Merge pull request #949 from TheBlueMatt/2021-06-send-priv-update
[rust-lightning] / lightning / src / ln / functional_tests.rs
index b2dce269c3caf818a3907166641440813c94da78..073f3578de60b4419ed196d4b39ae5758942d0fe 100644 (file)
 //! 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;
 use chain::keysinterface::{KeysInterface, BaseSign};
+use ln::{PaymentPreimage, PaymentSecret, PaymentHash};
 use ln::channel::{COMMITMENT_TX_BASE_WEIGHT, COMMITMENT_TX_WEIGHT_PER_HTLC};
-use ln::channelmanager::{ChannelManager, ChannelManagerReadArgs, RAACommitmentOrder, PaymentPreimage, PaymentHash, PaymentSecret, PaymentSendFailure, BREAKDOWN_TIMEOUT};
+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};
@@ -28,7 +28,7 @@ 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, EventsProvider, MessageSendEvent, MessageSendEventsProvider};
+use util::events::{Event, MessageSendEvent, MessageSendEventsProvider};
 use util::errors::APIError;
 use util::ser::{Writeable, ReadableArgs};
 use util::config::UserConfig;
@@ -49,9 +49,10 @@ use bitcoin::secp256k1::key::{PublicKey,SecretKey};
 
 use regex;
 
-use std::collections::{BTreeSet, HashMap, HashSet};
-use std::default::Default;
-use std::sync::Mutex;
+use prelude::*;
+use alloc::collections::BTreeSet;
+use core::default::Default;
+use std::sync::{Arc, Mutex};
 
 use ln::functional_test_utils::*;
 use ln::chan_utils::CommitmentTransaction;
@@ -128,7 +129,7 @@ fn test_async_inbound_update_fee() {
        let channel_id = chan.2;
 
        // balancing
-       send_payment(&nodes[0], &vec!(&nodes[1])[..], 8000000, 8_000_000);
+       send_payment(&nodes[0], &vec!(&nodes[1])[..], 8000000);
 
        // A                                        B
        // update_fee                            ->
@@ -165,7 +166,7 @@ fn test_async_inbound_update_fee() {
        // ...but before it's delivered, nodes[1] starts to send a payment back to nodes[0]...
        let (_, our_payment_hash, our_payment_secret) = get_payment_preimage_hash!(nodes[0]);
        let net_graph_msg_handler = &nodes[1].net_graph_msg_handler;
-       nodes[1].node.send_payment(&get_route(&nodes[1].node.get_our_node_id(), &net_graph_msg_handler.network_graph.read().unwrap(), &nodes[0].node.get_our_node_id(), None, None, &Vec::new(), 40000, TEST_FINAL_CLTV, &logger).unwrap(), our_payment_hash, &None).unwrap();
+       nodes[1].node.send_payment(&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(), 40000, TEST_FINAL_CLTV, &logger).unwrap(), our_payment_hash, &Some(our_payment_secret)).unwrap();
        check_added_monitors!(nodes[1], 1);
 
        let payment_event = {
@@ -243,7 +244,7 @@ fn test_update_fee_unordered_raa() {
        let logger = test_utils::TestLogger::new();
 
        // balancing
-       send_payment(&nodes[0], &vec!(&nodes[1])[..], 8000000, 8_000_000);
+       send_payment(&nodes[0], &vec!(&nodes[1])[..], 8000000);
 
        // First nodes[0] generates an update_fee
        nodes[0].node.update_fee(channel_id, get_feerate!(nodes[0], channel_id) + 20).unwrap();
@@ -263,7 +264,7 @@ fn test_update_fee_unordered_raa() {
        // ...but before it's delivered, nodes[1] starts to send a payment back to nodes[0]...
        let (_, our_payment_hash, our_payment_secret) = get_payment_preimage_hash!(nodes[0]);
        let net_graph_msg_handler = &nodes[1].net_graph_msg_handler;
-       nodes[1].node.send_payment(&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(), 40000, TEST_FINAL_CLTV, &logger).unwrap(), our_payment_hash, &None).unwrap();
+       nodes[1].node.send_payment(&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(), 40000, TEST_FINAL_CLTV, &logger).unwrap(), our_payment_hash, &Some(our_payment_secret)).unwrap();
        check_added_monitors!(nodes[1], 1);
 
        let payment_event = {
@@ -625,7 +626,7 @@ fn test_update_fee_with_fundee_update_add_htlc() {
        let logger = test_utils::TestLogger::new();
 
        // balancing
-       send_payment(&nodes[0], &vec!(&nodes[1])[..], 8000000, 8_000_000);
+       send_payment(&nodes[0], &vec!(&nodes[1])[..], 8000000);
 
        let feerate = get_feerate!(nodes[0], channel_id);
        nodes[0].node.update_fee(channel_id, feerate+20).unwrap();
@@ -649,7 +650,7 @@ fn test_update_fee_with_fundee_update_add_htlc() {
        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(), 800000, TEST_FINAL_CLTV, &logger).unwrap();
 
        // nothing happens since node[1] is in AwaitingRemoteRevoke
-       nodes[1].node.send_payment(&route, our_payment_hash, &None).unwrap();
+       nodes[1].node.send_payment(&route, our_payment_hash, &Some(our_payment_secret)).unwrap();
        {
                let mut added_monitors = nodes[0].chain_monitor.added_monitors.lock().unwrap();
                assert_eq!(added_monitors.len(), 0);
@@ -705,10 +706,10 @@ fn test_update_fee_with_fundee_update_add_htlc() {
                _ => panic!("Unexpected event"),
        };
 
-       claim_payment(&nodes[1], &vec!(&nodes[0])[..], our_payment_preimage, 800_000);
+       claim_payment(&nodes[1], &vec!(&nodes[0])[..], our_payment_preimage);
 
-       send_payment(&nodes[1], &vec!(&nodes[0])[..], 800000, 800_000);
-       send_payment(&nodes[0], &vec!(&nodes[1])[..], 800000, 800_000);
+       send_payment(&nodes[1], &vec!(&nodes[0])[..], 800000);
+       send_payment(&nodes[0], &vec!(&nodes[1])[..], 800000);
        close_channel(&nodes[0], &nodes[1], &chan.2, chan.3, true);
 }
 
@@ -871,10 +872,10 @@ fn updates_shutdown_wait() {
        let net_graph_msg_handler1 = &nodes[1].net_graph_msg_handler;
        let route_1 = get_route(&nodes[0].node.get_our_node_id(), &net_graph_msg_handler0.network_graph.read().unwrap(), &nodes[1].node.get_our_node_id(), Some(InvoiceFeatures::known()), None, &[], 100000, TEST_FINAL_CLTV, &logger).unwrap();
        let route_2 = get_route(&nodes[1].node.get_our_node_id(), &net_graph_msg_handler1.network_graph.read().unwrap(), &nodes[0].node.get_our_node_id(), Some(InvoiceFeatures::known()), None, &[], 100000, TEST_FINAL_CLTV, &logger).unwrap();
-       unwrap_send_err!(nodes[0].node.send_payment(&route_1, payment_hash, &None), true, APIError::ChannelUnavailable {..}, {});
-       unwrap_send_err!(nodes[1].node.send_payment(&route_2, payment_hash, &None), true, APIError::ChannelUnavailable {..}, {});
+       unwrap_send_err!(nodes[0].node.send_payment(&route_1, payment_hash, &Some(payment_secret)), true, APIError::ChannelUnavailable {..}, {});
+       unwrap_send_err!(nodes[1].node.send_payment(&route_2, payment_hash, &Some(payment_secret)), true, APIError::ChannelUnavailable {..}, {});
 
-       assert!(nodes[2].node.claim_funds(our_payment_preimage, &None, 100_000));
+       assert!(nodes[2].node.claim_funds(our_payment_preimage));
        check_added_monitors!(nodes[2], 1);
        let updates = get_htlc_update_msgs!(nodes[2], nodes[1].node.get_our_node_id());
        assert!(updates.update_add_htlcs.is_empty());
@@ -934,7 +935,7 @@ fn htlc_fail_async_shutdown() {
        let (_, our_payment_hash, our_payment_secret) = get_payment_preimage_hash!(nodes[2]);
        let net_graph_msg_handler = &nodes[0].net_graph_msg_handler;
        let route = get_route(&nodes[0].node.get_our_node_id(), &net_graph_msg_handler.network_graph.read().unwrap(), &nodes[2].node.get_our_node_id(), Some(InvoiceFeatures::known()), None, &[], 100000, TEST_FINAL_CLTV, &logger).unwrap();
-       nodes[0].node.send_payment(&route, our_payment_hash, &None).unwrap();
+       nodes[0].node.send_payment(&route, our_payment_hash, &Some(our_payment_secret)).unwrap();
        check_added_monitors!(nodes[0], 1);
        let updates = get_htlc_update_msgs!(nodes[0], nodes[1].node.get_our_node_id());
        assert_eq!(updates.update_add_htlcs.len(), 1);
@@ -1008,7 +1009,7 @@ fn do_test_shutdown_rebroadcast(recv_count: u8) {
        let chan_1 = 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());
 
-       let (our_payment_preimage, _, our_payment_secret) = route_payment(&nodes[0], &[&nodes[1], &nodes[2]], 100000);
+       let (our_payment_preimage, _, _) = route_payment(&nodes[0], &[&nodes[1], &nodes[2]], 100000);
 
        nodes[1].node.close_channel(&chan_1.2).unwrap();
        let node_1_shutdown = get_event_msg!(nodes[1], MessageSendEvent::SendShutdown, nodes[0].node.get_our_node_id());
@@ -1038,7 +1039,8 @@ 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())
        };
@@ -1047,7 +1049,7 @@ fn do_test_shutdown_rebroadcast(recv_count: u8) {
        assert!(nodes[0].node.get_and_clear_pending_msg_events().is_empty());
        assert!(nodes[1].node.get_and_clear_pending_msg_events().is_empty());
 
-       assert!(nodes[2].node.claim_funds(our_payment_preimage, &None, 100_000));
+       assert!(nodes[2].node.claim_funds(our_payment_preimage));
        check_added_monitors!(nodes[2], 1);
        let updates = get_htlc_update_msgs!(nodes[2], nodes[1].node.get_our_node_id());
        assert!(updates.update_add_htlcs.is_empty());
@@ -1175,15 +1177,15 @@ fn fake_network_test() {
        let chan_3 = create_announced_chan_between_nodes(&nodes, 2, 3, InitFeatures::known(), InitFeatures::known());
 
        // Rebalance the network a bit by relaying one payment through all the channels...
-       send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3])[..], 8000000, 8_000_000);
-       send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3])[..], 8000000, 8_000_000);
-       send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3])[..], 8000000, 8_000_000);
-       send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3])[..], 8000000, 8_000_000);
+       send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3])[..], 8000000);
+       send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3])[..], 8000000);
+       send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3])[..], 8000000);
+       send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3])[..], 8000000);
 
        // Send some more payments
-       send_payment(&nodes[1], &vec!(&nodes[2], &nodes[3])[..], 1000000, 1_000_000);
-       send_payment(&nodes[3], &vec!(&nodes[2], &nodes[1], &nodes[0])[..], 1000000, 1_000_000);
-       send_payment(&nodes[3], &vec!(&nodes[2], &nodes[1])[..], 1000000, 1_000_000);
+       send_payment(&nodes[1], &vec!(&nodes[2], &nodes[3])[..], 1000000);
+       send_payment(&nodes[3], &vec!(&nodes[2], &nodes[1], &nodes[0])[..], 1000000);
+       send_payment(&nodes[3], &vec!(&nodes[2], &nodes[1])[..], 1000000);
 
        // Test failure packets
        let payment_hash_1 = route_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3])[..], 1000000).1;
@@ -1192,13 +1194,13 @@ fn fake_network_test() {
        // Add a new channel that skips 3
        let chan_4 = create_announced_chan_between_nodes(&nodes, 1, 3, InitFeatures::known(), InitFeatures::known());
 
-       send_payment(&nodes[0], &vec!(&nodes[1], &nodes[3])[..], 1000000, 1_000_000);
-       send_payment(&nodes[2], &vec!(&nodes[3])[..], 1000000, 1_000_000);
-       send_payment(&nodes[1], &vec!(&nodes[3])[..], 8000000, 8_000_000);
-       send_payment(&nodes[1], &vec!(&nodes[3])[..], 8000000, 8_000_000);
-       send_payment(&nodes[1], &vec!(&nodes[3])[..], 8000000, 8_000_000);
-       send_payment(&nodes[1], &vec!(&nodes[3])[..], 8000000, 8_000_000);
-       send_payment(&nodes[1], &vec!(&nodes[3])[..], 8000000, 8_000_000);
+       send_payment(&nodes[0], &vec!(&nodes[1], &nodes[3])[..], 1000000);
+       send_payment(&nodes[2], &vec!(&nodes[3])[..], 1000000);
+       send_payment(&nodes[1], &vec!(&nodes[3])[..], 8000000);
+       send_payment(&nodes[1], &vec!(&nodes[3])[..], 8000000);
+       send_payment(&nodes[1], &vec!(&nodes[3])[..], 8000000);
+       send_payment(&nodes[1], &vec!(&nodes[3])[..], 8000000);
+       send_payment(&nodes[1], &vec!(&nodes[3])[..], 8000000);
 
        // Do some rebalance loop payments, simultaneously
        let mut hops = Vec::with_capacity(3);
@@ -1261,7 +1263,7 @@ fn fake_network_test() {
 
        // Claim the rebalances...
        fail_payment(&nodes[1], &vec!(&nodes[3], &nodes[2], &nodes[1])[..], payment_hash_2);
-       claim_payment(&nodes[1], &vec!(&nodes[2], &nodes[3], &nodes[1])[..], payment_preimage_1, 1_000_000);
+       claim_payment(&nodes[1], &vec!(&nodes[2], &nodes[3], &nodes[1])[..], payment_preimage_1);
 
        // Add a duplicate new channel from 2 to 4
        let chan_5 = create_announced_chan_between_nodes(&nodes, 1, 3, InitFeatures::known(), InitFeatures::known());
@@ -1279,9 +1281,9 @@ fn fake_network_test() {
 
        //TODO: Test that routes work again here as we've been notified that the channel is full
 
-       claim_payment(&nodes[0], &vec!(&nodes[1], &nodes[3])[..], payment_preimage_3, 3_000_000);
-       claim_payment(&nodes[0], &vec!(&nodes[1], &nodes[3])[..], payment_preimage_4, 3_000_000);
-       claim_payment(&nodes[0], &vec!(&nodes[1], &nodes[3])[..], payment_preimage_5, 3_000_000);
+       claim_payment(&nodes[0], &vec!(&nodes[1], &nodes[3])[..], payment_preimage_3);
+       claim_payment(&nodes[0], &vec!(&nodes[1], &nodes[3])[..], payment_preimage_4);
+       claim_payment(&nodes[0], &vec!(&nodes[1], &nodes[3])[..], payment_preimage_5);
 
        // Close down the channels...
        close_channel(&nodes[0], &nodes[1], &chan_1.2, chan_1.3, true);
@@ -1309,7 +1311,7 @@ fn holding_cell_htlc_counting() {
                let (payment_preimage, payment_hash, payment_secret) = get_payment_preimage_hash!(nodes[2]);
                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[2].node.get_our_node_id(), Some(InvoiceFeatures::known()), None, &Vec::new(), 100000, TEST_FINAL_CLTV, &logger).unwrap();
-               nodes[1].node.send_payment(&route, payment_hash, &None).unwrap();
+               nodes[1].node.send_payment(&route, payment_hash, &Some(payment_secret)).unwrap();
                payments.push((payment_preimage, payment_hash));
        }
        check_added_monitors!(nodes[1], 1);
@@ -1326,7 +1328,7 @@ fn holding_cell_htlc_counting() {
        {
                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[2].node.get_our_node_id(), Some(InvoiceFeatures::known()), None, &Vec::new(), 100000, TEST_FINAL_CLTV, &logger).unwrap();
-               unwrap_send_err!(nodes[1].node.send_payment(&route, payment_hash_1, &None), true, APIError::ChannelUnavailable { ref err },
+               unwrap_send_err!(nodes[1].node.send_payment(&route, payment_hash_1, &Some(payment_secret_1)), true, APIError::ChannelUnavailable { ref err },
                        assert!(regex::Regex::new(r"Cannot push more than their max accepted HTLCs \(\d+\)").unwrap().is_match(err)));
                assert!(nodes[1].node.get_and_clear_pending_msg_events().is_empty());
                nodes[1].logger.assert_log_contains("lightning::ln::channelmanager".to_string(), "Cannot push more than their max accepted HTLCs".to_string(), 1);
@@ -1337,7 +1339,7 @@ fn holding_cell_htlc_counting() {
        {
                let net_graph_msg_handler = &nodes[0].net_graph_msg_handler;
                let route = get_route(&nodes[0].node.get_our_node_id(), &net_graph_msg_handler.network_graph.read().unwrap(), &nodes[2].node.get_our_node_id(), Some(InvoiceFeatures::known()), None, &Vec::new(), 100000, TEST_FINAL_CLTV, &logger).unwrap();
-               nodes[0].node.send_payment(&route, payment_hash_2, &None).unwrap();
+               nodes[0].node.send_payment(&route, payment_hash_2, &Some(payment_secret_2)).unwrap();
                check_added_monitors!(nodes[0], 1);
        }
 
@@ -1358,15 +1360,7 @@ 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
@@ -1415,10 +1409,10 @@ fn holding_cell_htlc_counting() {
        }
 
        for (preimage, _) in payments.drain(..) {
-               claim_payment(&nodes[1], &[&nodes[2]], preimage, 100_000);
+               claim_payment(&nodes[1], &[&nodes[2]], preimage);
        }
 
-       send_payment(&nodes[0], &[&nodes[1], &nodes[2]], 1000000, 1_000_000);
+       send_payment(&nodes[0], &[&nodes[1], &nodes[2]], 1000000);
 }
 
 #[test]
@@ -1445,16 +1439,16 @@ fn duplicate_htlc_test() {
        *nodes[0].network_payment_count.borrow_mut() -= 1;
        assert_eq!(route_payment(&nodes[2], &vec!(&nodes[3], &nodes[5])[..], 1000000).0, payment_preimage);
 
-       claim_payment(&nodes[0], &vec!(&nodes[3], &nodes[4])[..], payment_preimage, 1_000_000);
+       claim_payment(&nodes[0], &vec!(&nodes[3], &nodes[4])[..], payment_preimage);
        fail_payment(&nodes[2], &vec!(&nodes[3], &nodes[5])[..], payment_hash);
-       claim_payment(&nodes[1], &vec!(&nodes[3])[..], payment_preimage, 1_000_000);
+       claim_payment(&nodes[1], &vec!(&nodes[3])[..], payment_preimage);
 }
 
 #[test]
 fn test_duplicate_htlc_different_direction_onchain() {
        // Test that ChannelMonitor doesn't generate 2 preimage txn
        // when we have 2 HTLCs with same preimage that go across a node
-       // in opposite directions.
+       // in opposite directions, even with the same payment secret.
        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]);
@@ -1464,16 +1458,17 @@ fn test_duplicate_htlc_different_direction_onchain() {
        let logger = test_utils::TestLogger::new();
 
        // balancing
-       send_payment(&nodes[0], &vec!(&nodes[1])[..], 8000000, 8_000_000);
+       send_payment(&nodes[0], &vec!(&nodes[1])[..], 8000000);
 
-       let (payment_preimage, payment_hash, payment_secret) = route_payment(&nodes[0], &vec!(&nodes[1])[..], 900_000);
+       let (payment_preimage, payment_hash, _) = route_payment(&nodes[0], &vec!(&nodes[1])[..], 900_000);
 
        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(), 800_000, TEST_FINAL_CLTV, &logger).unwrap();
-       send_along_route_with_hash(&nodes[1], route, &vec!(&nodes[0])[..], 800_000, payment_hash);
+       let node_a_payment_secret = nodes[0].node.create_inbound_payment_for_hash(payment_hash, None, 7200, 0).unwrap();
+       send_along_route_with_secret(&nodes[1], route, &[&[&nodes[0]]], 800_000, payment_hash, node_a_payment_secret);
 
        // Provide preimage to node 0 by claiming payment
-       nodes[0].node.claim_funds(payment_preimage, &None, 800_000);
+       nodes[0].node.claim_funds(payment_preimage);
        check_added_monitors!(nodes[0], 1);
 
        // Broadcast node 1 commitment txn
@@ -1492,19 +1487,29 @@ fn test_duplicate_htlc_different_direction_onchain() {
 
        mine_transaction(&nodes[0], &remote_txn[0]);
        check_added_monitors!(nodes[0], 1);
+       connect_blocks(&nodes[0], TEST_FINAL_CLTV - 1); // Confirm blocks until the HTLC expires
 
        // Check we only broadcast 1 timeout tx
        let claim_txn = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().clone();
-       let htlc_pair = if claim_txn[0].output[0].value == 800_000 / 1000 { (claim_txn[0].clone(), claim_txn[1].clone()) } else { (claim_txn[1].clone(), claim_txn[0].clone()) };
-       assert_eq!(claim_txn.len(), 5);
-       check_spends!(claim_txn[2], chan_1.3);
-       check_spends!(claim_txn[3], claim_txn[2]);
-       assert_eq!(htlc_pair.0.input.len(), 1);
-       assert_eq!(htlc_pair.0.input[0].witness.last().unwrap().len(), OFFERED_HTLC_SCRIPT_WEIGHT); // HTLC 1 <--> 0, preimage tx
-       check_spends!(htlc_pair.0, remote_txn[0]);
-       assert_eq!(htlc_pair.1.input.len(), 1);
-       assert_eq!(htlc_pair.1.input[0].witness.last().unwrap().len(), ACCEPTED_HTLC_SCRIPT_WEIGHT); // HTLC 0 <--> 1, timeout tx
-       check_spends!(htlc_pair.1, remote_txn[0]);
+       assert_eq!(claim_txn.len(), 8);
+       assert_eq!(claim_txn[1], claim_txn[4]);
+       assert_eq!(claim_txn[2], claim_txn[5]);
+       check_spends!(claim_txn[1], chan_1.3);
+       check_spends!(claim_txn[2], claim_txn[1]);
+       check_spends!(claim_txn[7], claim_txn[1]);
+
+       assert_eq!(claim_txn[0].input.len(), 1);
+       assert_eq!(claim_txn[3].input.len(), 1);
+       assert_eq!(claim_txn[0].input[0].previous_output, claim_txn[3].input[0].previous_output);
+
+       assert_eq!(claim_txn[0].input.len(), 1);
+       assert_eq!(claim_txn[0].input[0].witness.last().unwrap().len(), OFFERED_HTLC_SCRIPT_WEIGHT); // HTLC 1 <--> 0, preimage tx
+       check_spends!(claim_txn[0], remote_txn[0]);
+       assert_eq!(remote_txn[0].output[claim_txn[0].input[0].previous_output.vout as usize].value, 800);
+       assert_eq!(claim_txn[6].input.len(), 1);
+       assert_eq!(claim_txn[6].input[0].witness.last().unwrap().len(), ACCEPTED_HTLC_SCRIPT_WEIGHT); // HTLC 0 <--> 1, timeout tx
+       check_spends!(claim_txn[6], remote_txn[0]);
+       assert_eq!(remote_txn[0].output[claim_txn[6].input[0].previous_output.vout as usize].value, 900);
 
        let events = nodes[0].node.get_and_clear_pending_msg_events();
        assert_eq!(events.len(), 3);
@@ -1545,7 +1550,7 @@ fn test_basic_channel_reserve() {
        let max_can_send = 5000000 - channel_reserve - commit_tx_fee;
        let net_graph_msg_handler = &nodes[0].net_graph_msg_handler;
        let route = get_route(&nodes[0].node.get_our_node_id(), &net_graph_msg_handler.network_graph.read().unwrap(), &nodes.last().unwrap().node.get_our_node_id(), Some(InvoiceFeatures::known()), None, &Vec::new(), max_can_send + 1, TEST_FINAL_CLTV, &logger).unwrap();
-       let err = nodes[0].node.send_payment(&route, our_payment_hash, &None).err().unwrap();
+       let err = nodes[0].node.send_payment(&route, our_payment_hash, &Some(our_payment_secret)).err().unwrap();
        match err {
                PaymentSendFailure::AllFailedRetrySafe(ref fails) => {
                        match &fails[0] {
@@ -1559,7 +1564,7 @@ fn test_basic_channel_reserve() {
        assert!(nodes[0].node.get_and_clear_pending_msg_events().is_empty());
        nodes[0].logger.assert_log_contains("lightning::ln::channelmanager".to_string(), "Cannot send value that would put our balance under counterparty-announced channel reserve value".to_string(), 1);
 
-       send_payment(&nodes[0], &vec![&nodes[1]], max_can_send, max_can_send);
+       send_payment(&nodes[0], &vec![&nodes[1]], max_can_send);
 }
 
 #[test]
@@ -1578,7 +1583,7 @@ 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, &None, cur_height).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_packet = onion_utils::construct_onion_packet(onion_payloads, onion_keys, [0; 32], &payment_hash);
        let msg = msgs::UpdateAddHTLC {
                channel_id: chan.2,
@@ -1681,7 +1686,8 @@ 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);
 }
@@ -1701,7 +1707,7 @@ fn test_chan_reserve_violation_outbound_htlc_inbound_chan() {
        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);
-       unwrap_send_err!(nodes[1].node.send_payment(&route, our_payment_hash, &None), true, APIError::ChannelUnavailable { ref err },
+       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());
        nodes[1].logger.assert_log("lightning::ln::channelmanager".to_string(), "Cannot send value that would put counterparty balance under holder-announced channel reserve value".to_string(), 1);
@@ -1728,7 +1734,7 @@ 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, &None, cur_height).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_packet = onion_utils::construct_onion_packet(onion_payloads, onion_keys, [0; 32], &payment_hash);
        let msg = msgs::UpdateAddHTLC {
                channel_id: chan.2,
@@ -1762,7 +1768,7 @@ fn test_chan_reserve_dust_inbound_htlcs_outbound_chan() {
        // transaction fee with 0 HTLCs (183 sats)).
        create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 100000, 98817000, InitFeatures::known(), InitFeatures::known());
 
-       let dust_amt = 546000; // Dust amount
+       let dust_amt = 329000; // Dust amount
        // 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.
@@ -1821,7 +1827,7 @@ fn test_chan_reserve_violation_inbound_htlc_inbound_chan() {
        // Add a pending HTLC.
        let (route_1, our_payment_hash_1, _, our_payment_secret_1) = get_route_and_payment_hash!(nodes[0], nodes[2], amt_msat_1);
        let payment_event_1 = {
-               nodes[0].node.send_payment(&route_1, our_payment_hash_1, &None).unwrap();
+               nodes[0].node.send_payment(&route_1, our_payment_hash_1, &Some(our_payment_secret_1)).unwrap();
                check_added_monitors!(nodes[0], 1);
 
                let mut events = nodes[0].node.get_and_clear_pending_msg_events();
@@ -1873,11 +1879,12 @@ 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 {
@@ -1920,7 +1927,7 @@ fn test_channel_reserve_holding_cell_htlcs() {
                let (mut route, our_payment_hash, _, our_payment_secret) = get_route_and_payment_hash!(nodes[0], nodes[2], recv_value_0);
                route.paths[0].last_mut().unwrap().fee_msat += 1;
                assert!(route.paths[0].iter().rev().skip(1).all(|h| h.fee_msat == feemsat));
-               unwrap_send_err!(nodes[0].node.send_payment(&route, our_payment_hash, &None), true, APIError::ChannelUnavailable { ref err },
+               unwrap_send_err!(nodes[0].node.send_payment(&route, our_payment_hash, &Some(our_payment_secret)), true, APIError::ChannelUnavailable { ref err },
                        assert!(regex::Regex::new(r"Cannot send value that would put us over the max HTLC value in flight our peer will accept \(\d+\)").unwrap().is_match(err)));
                assert!(nodes[0].node.get_and_clear_pending_msg_events().is_empty());
                nodes[0].logger.assert_log_contains("lightning::ln::channelmanager".to_string(), "Cannot send value that would put us over the max HTLC value in flight our peer will accept".to_string(), 1);
@@ -1938,7 +1945,7 @@ fn test_channel_reserve_holding_cell_htlcs() {
                if stat01.value_to_self_msat < stat01.channel_reserve_msat + commit_tx_fee_all_htlcs + ensure_htlc_amounts_above_dust_buffer + amt_msat {
                        break;
                }
-               send_payment(&nodes[0], &vec![&nodes[1], &nodes[2]][..], recv_value_0, recv_value_0);
+               send_payment(&nodes[0], &vec![&nodes[1], &nodes[2]][..], recv_value_0);
 
                let (stat01_, stat11_, stat12_, stat22_) = (
                        get_channel_value_stat!(nodes[0], chan_1.2),
@@ -1971,7 +1978,7 @@ fn test_channel_reserve_holding_cell_htlcs() {
 
        let (route_1, our_payment_hash_1, our_payment_preimage_1, our_payment_secret_1) = get_route_and_payment_hash!(nodes[0], nodes[2], recv_value_1);
        let payment_event_1 = {
-               nodes[0].node.send_payment(&route_1, our_payment_hash_1, &None).unwrap();
+               nodes[0].node.send_payment(&route_1, our_payment_hash_1, &Some(our_payment_secret_1)).unwrap();
                check_added_monitors!(nodes[0], 1);
 
                let mut events = nodes[0].node.get_and_clear_pending_msg_events();
@@ -1984,7 +1991,7 @@ fn test_channel_reserve_holding_cell_htlcs() {
        let recv_value_2 = stat01.value_to_self_msat - amt_msat_1 - stat01.channel_reserve_msat - total_fee_msat - commit_tx_fee_2_htlcs;
        {
                let (route, our_payment_hash, _, our_payment_secret) = get_route_and_payment_hash!(nodes[0], nodes[2], recv_value_2 + 1);
-               unwrap_send_err!(nodes[0].node.send_payment(&route, our_payment_hash, &None), true, APIError::ChannelUnavailable { ref err },
+               unwrap_send_err!(nodes[0].node.send_payment(&route, our_payment_hash, &Some(our_payment_secret)), true, APIError::ChannelUnavailable { ref err },
                        assert!(regex::Regex::new(r"Cannot send value that would put our balance under counterparty-announced channel reserve value \(\d+\)").unwrap().is_match(err)));
                assert!(nodes[0].node.get_and_clear_pending_msg_events().is_empty());
        }
@@ -2002,7 +2009,7 @@ fn test_channel_reserve_holding_cell_htlcs() {
        // now see if they go through on both sides
        let (route_21, our_payment_hash_21, our_payment_preimage_21, our_payment_secret_21) = get_route_and_payment_hash!(nodes[0], nodes[2], recv_value_21);
        // but this will stuck in the holding cell
-       nodes[0].node.send_payment(&route_21, our_payment_hash_21, &None).unwrap();
+       nodes[0].node.send_payment(&route_21, our_payment_hash_21, &Some(our_payment_secret_21)).unwrap();
        check_added_monitors!(nodes[0], 0);
        let events = nodes[0].node.get_and_clear_pending_events();
        assert_eq!(events.len(), 0);
@@ -2010,7 +2017,7 @@ fn test_channel_reserve_holding_cell_htlcs() {
        // test with outbound holding cell amount > 0
        {
                let (route, our_payment_hash, _, our_payment_secret) = get_route_and_payment_hash!(nodes[0], nodes[2], recv_value_22+1);
-               unwrap_send_err!(nodes[0].node.send_payment(&route, our_payment_hash, &None), true, APIError::ChannelUnavailable { ref err },
+               unwrap_send_err!(nodes[0].node.send_payment(&route, our_payment_hash, &Some(our_payment_secret)), true, APIError::ChannelUnavailable { ref err },
                        assert!(regex::Regex::new(r"Cannot send value that would put our balance under counterparty-announced channel reserve value \(\d+\)").unwrap().is_match(err)));
                assert!(nodes[0].node.get_and_clear_pending_msg_events().is_empty());
                nodes[0].logger.assert_log_contains("lightning::ln::channelmanager".to_string(), "Cannot send value that would put our balance under counterparty-announced channel reserve value".to_string(), 2);
@@ -2018,7 +2025,7 @@ fn test_channel_reserve_holding_cell_htlcs() {
 
        let (route_22, our_payment_hash_22, our_payment_preimage_22, our_payment_secret_22) = get_route_and_payment_hash!(nodes[0], nodes[2], recv_value_22);
        // this will also stuck in the holding cell
-       nodes[0].node.send_payment(&route_22, our_payment_hash_22, &None).unwrap();
+       nodes[0].node.send_payment(&route_22, our_payment_hash_22, &Some(our_payment_secret_22)).unwrap();
        check_added_monitors!(nodes[0], 0);
        assert!(nodes[0].node.get_and_clear_pending_events().is_empty());
        assert!(nodes[0].node.get_and_clear_pending_msg_events().is_empty());
@@ -2049,7 +2056,7 @@ fn test_channel_reserve_holding_cell_htlcs() {
        commitment_signed_dance!(nodes[2], nodes[1], payment_event_11.commitment_msg, false);
 
        expect_pending_htlcs_forwardable!(nodes[2]);
-       expect_payment_received!(nodes[2], our_payment_hash_1, recv_value_1);
+       expect_payment_received!(nodes[2], our_payment_hash_1, our_payment_secret_1, recv_value_1);
 
        // flush the htlcs in the holding cell
        assert_eq!(commitment_update_2.update_add_htlcs.len(), 2);
@@ -2069,29 +2076,31 @@ 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_secret, amt } => {
+               Event::PaymentReceived { ref payment_hash, ref payment_preimage, ref payment_secret, amt, user_payment_id: _ } => {
                        assert_eq!(our_payment_hash_21, *payment_hash);
-                       assert_eq!(*payment_secret, None);
+                       assert!(payment_preimage.is_none());
+                       assert_eq!(our_payment_secret_21, *payment_secret);
                        assert_eq!(recv_value_21, amt);
                },
                _ => panic!("Unexpected event"),
        }
        match events[1] {
-               Event::PaymentReceived { ref payment_hash, ref payment_secret, amt } => {
+               Event::PaymentReceived { ref payment_hash, ref payment_preimage, ref payment_secret, amt, user_payment_id: _ } => {
                        assert_eq!(our_payment_hash_22, *payment_hash);
-                       assert_eq!(None, *payment_secret);
+                       assert!(payment_preimage.is_none());
+                       assert_eq!(our_payment_secret_22, *payment_secret);
                        assert_eq!(recv_value_22, amt);
                },
                _ => panic!("Unexpected event"),
        }
 
-       claim_payment(&nodes[0], &vec!(&nodes[1], &nodes[2]), our_payment_preimage_1, recv_value_1);
-       claim_payment(&nodes[0], &vec!(&nodes[1], &nodes[2]), our_payment_preimage_21, recv_value_21);
-       claim_payment(&nodes[0], &vec!(&nodes[1], &nodes[2]), our_payment_preimage_22, recv_value_22);
+       claim_payment(&nodes[0], &vec!(&nodes[1], &nodes[2]), our_payment_preimage_1);
+       claim_payment(&nodes[0], &vec!(&nodes[1], &nodes[2]), our_payment_preimage_21);
+       claim_payment(&nodes[0], &vec!(&nodes[1], &nodes[2]), our_payment_preimage_22);
 
        let commit_tx_fee_0_htlcs = 2*commit_tx_fee_msat(feerate, 1);
        let recv_value_3 = commit_tx_fee_2_htlcs - commit_tx_fee_0_htlcs - total_fee_msat;
-       send_payment(&nodes[0], &vec![&nodes[1], &nodes[2]][..], recv_value_3, recv_value_3);
+       send_payment(&nodes[0], &vec![&nodes[1], &nodes[2]][..], recv_value_3);
 
        let commit_tx_fee_1_htlc = 2*commit_tx_fee_msat(feerate, 1 + 1);
        let expected_value_to_self = stat01.value_to_self_msat - (recv_value_1 + total_fee_msat) - (recv_value_21 + total_fee_msat) - (recv_value_22 + total_fee_msat) - (recv_value_3 + total_fee_msat);
@@ -2144,7 +2153,7 @@ fn channel_reserve_in_flight_removes() {
        let send_1 = {
                let net_graph_msg_handler = &nodes[0].net_graph_msg_handler;
                let route = get_route(&nodes[0].node.get_our_node_id(), &net_graph_msg_handler.network_graph.read().unwrap(), &nodes[1].node.get_our_node_id(), Some(InvoiceFeatures::known()), None, &[], 100000, TEST_FINAL_CLTV, &logger).unwrap();
-               nodes[0].node.send_payment(&route, payment_hash_3, &None).unwrap();
+               nodes[0].node.send_payment(&route, payment_hash_3, &Some(payment_secret_3)).unwrap();
                check_added_monitors!(nodes[0], 1);
                let mut events = nodes[0].node.get_and_clear_pending_msg_events();
                assert_eq!(events.len(), 1);
@@ -2153,13 +2162,13 @@ fn channel_reserve_in_flight_removes() {
 
        // Now claim both of the first two HTLCs on B's end, putting B in AwaitingRAA and generating an
        // initial fulfill/CS.
-       assert!(nodes[1].node.claim_funds(payment_preimage_1, &None, b_chan_values.channel_reserve_msat - b_chan_values.value_to_self_msat - 10000));
+       assert!(nodes[1].node.claim_funds(payment_preimage_1));
        check_added_monitors!(nodes[1], 1);
        let bs_removes = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
 
        // This claim goes in B's holding cell, allowing us to have a pending B->A RAA which does not
        // remove the second HTLC when we send the HTLC back from B to A.
-       assert!(nodes[1].node.claim_funds(payment_preimage_2, &None, 20000));
+       assert!(nodes[1].node.claim_funds(payment_preimage_2));
        check_added_monitors!(nodes[1], 1);
        assert!(nodes[1].node.get_and_clear_pending_msg_events().is_empty());
 
@@ -2203,7 +2212,7 @@ fn channel_reserve_in_flight_removes() {
        assert!(nodes[1].node.get_and_clear_pending_msg_events().is_empty());
 
        expect_pending_htlcs_forwardable!(nodes[1]);
-       expect_payment_received!(nodes[1], payment_hash_3, 100000);
+       expect_payment_received!(nodes[1], payment_hash_3, payment_secret_3, 100000);
 
        // Note that as this RAA was generated before the delivery of the update_fulfill it shouldn't
        // resolve the second HTLC from A's point of view.
@@ -2217,7 +2226,7 @@ fn channel_reserve_in_flight_removes() {
        let send_2 = {
                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, &[], 10000, TEST_FINAL_CLTV, &logger).unwrap();
-               nodes[1].node.send_payment(&route, payment_hash_4, &None).unwrap();
+               nodes[1].node.send_payment(&route, payment_hash_4, &Some(payment_secret_4)).unwrap();
                check_added_monitors!(nodes[1], 1);
                let mut events = nodes[1].node.get_and_clear_pending_msg_events();
                assert_eq!(events.len(), 1);
@@ -2250,10 +2259,10 @@ fn channel_reserve_in_flight_removes() {
        check_added_monitors!(nodes[0], 1);
 
        expect_pending_htlcs_forwardable!(nodes[0]);
-       expect_payment_received!(nodes[0], payment_hash_4, 10000);
+       expect_payment_received!(nodes[0], payment_hash_4, payment_secret_4, 10000);
 
-       claim_payment(&nodes[1], &[&nodes[0]], payment_preimage_4, 10_000);
-       claim_payment(&nodes[0], &[&nodes[1]], payment_preimage_3, 100_000);
+       claim_payment(&nodes[1], &[&nodes[0]], payment_preimage_4);
+       claim_payment(&nodes[0], &[&nodes[1]], payment_preimage_3);
 }
 
 #[test]
@@ -2279,10 +2288,10 @@ fn channel_monitor_network_test() {
        connect_blocks(&nodes[4], 4*CHAN_CONFIRM_DEPTH + 1 - nodes[4].best_block_info().1);
 
        // Rebalance the network a bit by relaying one payment through all the channels...
-       send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3], &nodes[4])[..], 8000000, 8_000_000);
-       send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3], &nodes[4])[..], 8000000, 8_000_000);
-       send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3], &nodes[4])[..], 8000000, 8_000_000);
-       send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3], &nodes[4])[..], 8000000, 8_000_000);
+       send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3], &nodes[4])[..], 8000000);
+       send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3], &nodes[4])[..], 8000000);
+       send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3], &nodes[4])[..], 8000000);
+       send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3], &nodes[4])[..], 8000000);
 
        // Simple case with no pending HTLCs:
        nodes[1].node.peer_disconnected(&nodes[0].node.get_our_node_id(), true);
@@ -2302,12 +2311,15 @@ fn channel_monitor_network_test() {
        // One pending HTLC is discarded by the force-close:
        let payment_preimage_1 = route_payment(&nodes[1], &vec!(&nodes[2], &nodes[3])[..], 3000000).0;
 
-       // Simple case of one pending HTLC to HTLC-Timeout
+       // Simple case of one pending HTLC to HTLC-Timeout (note that the HTLC-Timeout is not
+       // broadcasted until we reach the timelock time).
        nodes[1].node.peer_disconnected(&nodes[2].node.get_our_node_id(), true);
        check_closed_broadcast!(nodes[1], false);
        check_added_monitors!(nodes[1], 1);
        {
-               let mut node_txn = test_txn_broadcast(&nodes[1], &chan_2, None, HTLCType::TIMEOUT);
+               let mut node_txn = test_txn_broadcast(&nodes[1], &chan_2, None, HTLCType::NONE);
+               connect_blocks(&nodes[1], TEST_FINAL_CLTV + LATENCY_GRACE_PERIOD_BLOCKS + MIN_CLTV_EXPIRY_DELTA as u32 + 1);
+               test_txn_broadcast(&nodes[1], &chan_2, None, HTLCType::TIMEOUT);
                mine_transaction(&nodes[2], &node_txn[0]);
                check_added_monitors!(nodes[2], 1);
                test_txn_broadcast(&nodes[2], &chan_2, None, HTLCType::NONE);
@@ -2317,9 +2329,9 @@ fn channel_monitor_network_test() {
        assert_eq!(nodes[2].node.list_channels().len(), 1);
 
        macro_rules! claim_funds {
-               ($node: expr, $prev_node: expr, $preimage: expr, $amount: expr) => {
+               ($node: expr, $prev_node: expr, $preimage: expr) => {
                        {
-                               assert!($node.node.claim_funds($preimage, &None, $amount));
+                               assert!($node.node.claim_funds($preimage));
                                check_added_monitors!($node, 1);
 
                                let events = $node.node.get_and_clear_pending_msg_events();
@@ -2343,11 +2355,13 @@ fn channel_monitor_network_test() {
        check_closed_broadcast!(nodes[2], false);
        let node2_commitment_txid;
        {
-               let node_txn = test_txn_broadcast(&nodes[2], &chan_3, None, HTLCType::TIMEOUT);
+               let node_txn = test_txn_broadcast(&nodes[2], &chan_3, None, HTLCType::NONE);
+               connect_blocks(&nodes[2], TEST_FINAL_CLTV + LATENCY_GRACE_PERIOD_BLOCKS + MIN_CLTV_EXPIRY_DELTA as u32 + 1);
+               test_txn_broadcast(&nodes[2], &chan_3, None, HTLCType::TIMEOUT);
                node2_commitment_txid = node_txn[0].txid();
 
                // Claim the payment on nodes[3], giving it knowledge of the preimage
-               claim_funds!(nodes[3], nodes[2], payment_preimage_1, 3_000_000);
+               claim_funds!(nodes[3], nodes[2], payment_preimage_1);
                mine_transaction(&nodes[3], &node_txn[0]);
                check_added_monitors!(nodes[3], 1);
                check_preimage_claim(&nodes[3], &node_txn);
@@ -2396,7 +2410,7 @@ fn channel_monitor_network_test() {
                let node_txn = test_txn_broadcast(&nodes[3], &chan_4, None, HTLCType::TIMEOUT);
 
                // Claim the payment on nodes[4], giving it knowledge of the preimage
-               claim_funds!(nodes[4], nodes[3], payment_preimage_2, 3_000_000);
+               claim_funds!(nodes[4], nodes[3], payment_preimage_2);
 
                connect_blocks(&nodes[4], TEST_FINAL_CLTV - CLTV_CLAIM_BUFFER + 2);
                let events = nodes[4].node.get_and_clear_pending_msg_events();
@@ -2461,7 +2475,7 @@ fn test_justice_tx() {
        assert_eq!(revoked_local_txn[1].input[0].previous_output.txid, revoked_local_txn[0].txid());
        assert_eq!(revoked_local_txn[1].input[0].witness.last().unwrap().len(), OFFERED_HTLC_SCRIPT_WEIGHT); // HTLC-Timeout
        // Revoke the old state
-       claim_payment(&nodes[0], &vec!(&nodes[1])[..], payment_preimage_3, 3_000_000);
+       claim_payment(&nodes[0], &vec!(&nodes[1])[..], payment_preimage_3);
 
        {
                mine_transaction(&nodes[1], &revoked_local_txn[0]);
@@ -2478,6 +2492,7 @@ fn test_justice_tx() {
                test_txn_broadcast(&nodes[1], &chan_5, None, HTLCType::NONE);
 
                mine_transaction(&nodes[0], &revoked_local_txn[0]);
+               connect_blocks(&nodes[0], TEST_FINAL_CLTV - 1); // Confirm blocks until the HTLC expires
                // Verify broadcast of revoked HTLC-timeout
                let node_txn = test_txn_broadcast(&nodes[0], &chan_5, Some(revoked_local_txn[0].clone()), HTLCType::TIMEOUT);
                check_added_monitors!(nodes[0], 1);
@@ -2507,7 +2522,7 @@ fn test_justice_tx() {
        assert_eq!(revoked_local_txn[0].input[0].previous_output.txid, chan_6.3.txid());
        assert_eq!(revoked_local_txn[0].output.len(), 2); // Only HTLC and output back to A are present
        // Revoke the old state
-       claim_payment(&nodes[0], &vec!(&nodes[1])[..], payment_preimage_4, 3_000_000);
+       claim_payment(&nodes[0], &vec!(&nodes[1])[..], payment_preimage_4);
        {
                mine_transaction(&nodes[0], &revoked_local_txn[0]);
                {
@@ -2547,7 +2562,7 @@ fn revoked_output_claim() {
        // Only output is the full channel value back to nodes[0]:
        assert_eq!(revoked_local_txn[0].output.len(), 1);
        // Send a payment through, updating everyone's latest commitment txn
-       send_payment(&nodes[0], &vec!(&nodes[1])[..], 5000000, 5_000_000);
+       send_payment(&nodes[0], &vec!(&nodes[1])[..], 5000000);
 
        // Inform nodes[1] that nodes[0] broadcast a stale tx
        mine_transaction(&nodes[1], &revoked_local_txn[0]);
@@ -2577,7 +2592,7 @@ fn claim_htlc_outputs_shared_tx() {
        let chan_1 = create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known());
 
        // Rebalance the network to generate htlc in the two directions
-       send_payment(&nodes[0], &vec!(&nodes[1])[..], 8000000, 8_000_000);
+       send_payment(&nodes[0], &vec!(&nodes[1])[..], 8000000);
        // node[0] is gonna to revoke an old state thus node[1] should be able to claim both offered/received HTLC outputs on top of commitment tx
        let payment_preimage_1 = route_payment(&nodes[0], &vec!(&nodes[1])[..], 3000000).0;
        let (_payment_preimage_2, payment_hash_2, _) = route_payment(&nodes[1], &vec!(&nodes[0])[..], 3000000);
@@ -2593,7 +2608,7 @@ fn claim_htlc_outputs_shared_tx() {
        check_spends!(revoked_local_txn[1], revoked_local_txn[0]);
 
        //Revoke the old state
-       claim_payment(&nodes[0], &vec!(&nodes[1])[..], payment_preimage_1, 3_000_000);
+       claim_payment(&nodes[0], &vec!(&nodes[1])[..], payment_preimage_1);
 
        {
                mine_transaction(&nodes[0], &revoked_local_txn[0]);
@@ -2604,7 +2619,7 @@ fn claim_htlc_outputs_shared_tx() {
                expect_payment_failed!(nodes[1], payment_hash_2, true);
 
                let node_txn = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap();
-               assert_eq!(node_txn.len(), 3); // ChannelMonitor: penalty tx, ChannelManager: local commitment + HTLC-timeout
+               assert_eq!(node_txn.len(), 2); // ChannelMonitor: penalty tx, ChannelManager: local commitment
 
                assert_eq!(node_txn[0].input.len(), 3); // Claim the revoked output + both revoked HTLC outputs
                check_spends!(node_txn[0], revoked_local_txn[0]);
@@ -2621,13 +2636,6 @@ fn claim_htlc_outputs_shared_tx() {
                // Next nodes[1] broadcasts its current local tx state:
                assert_eq!(node_txn[1].input.len(), 1);
                assert_eq!(node_txn[1].input[0].previous_output.txid, chan_1.3.txid()); //Spending funding tx unique txouput, tx broadcasted by ChannelManager
-
-               assert_eq!(node_txn[2].input.len(), 1);
-               let witness_script = node_txn[2].clone().input[0].witness.pop().unwrap();
-               assert_eq!(witness_script.len(), OFFERED_HTLC_SCRIPT_WEIGHT); //Spending an offered htlc output
-               assert_eq!(node_txn[2].input[0].previous_output.txid, node_txn[1].txid());
-               assert_ne!(node_txn[2].input[0].previous_output.txid, node_txn[0].input[0].previous_output.txid);
-               assert_ne!(node_txn[2].input[0].previous_output.txid, node_txn[0].input[1].previous_output.txid);
        }
        get_announce_close_broadcast_events(&nodes, 0, 1);
        assert_eq!(nodes[0].node.list_channels().len(), 0);
@@ -2646,7 +2654,7 @@ fn claim_htlc_outputs_single_tx() {
        let chan_1 = create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known());
 
        // Rebalance the network to generate htlc in the two directions
-       send_payment(&nodes[0], &vec!(&nodes[1])[..], 8000000, 8_000_000);
+       send_payment(&nodes[0], &vec!(&nodes[1])[..], 8000000);
        // node[0] is gonna to revoke an old state thus node[1] should be able to claim both offered/received HTLC outputs on top of commitment tx, but this
        // time as two different claim transactions as we're gonna to timeout htlc with given a high current height
        let payment_preimage_1 = route_payment(&nodes[0], &vec!(&nodes[1])[..], 3000000).0;
@@ -2656,7 +2664,7 @@ fn claim_htlc_outputs_single_tx() {
        let revoked_local_txn = get_local_commitment_txn!(nodes[0], chan_1.2);
 
        //Revoke the old state
-       claim_payment(&nodes[0], &vec!(&nodes[1])[..], payment_preimage_1, 3_000_000);
+       claim_payment(&nodes[0], &vec!(&nodes[1])[..], payment_preimage_1);
 
        {
                confirm_transaction_at(&nodes[0], &revoked_local_txn[0], 100);
@@ -2731,9 +2739,15 @@ fn test_htlc_on_chain_success() {
        let chan_1 = 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());
 
+       // Ensure all nodes are at the same height
+       let node_max_height = nodes.iter().map(|node| node.blocks.lock().unwrap().len()).max().unwrap() as u32;
+       connect_blocks(&nodes[0], node_max_height - nodes[0].best_block_info().1);
+       connect_blocks(&nodes[1], node_max_height - nodes[1].best_block_info().1);
+       connect_blocks(&nodes[2], node_max_height - nodes[2].best_block_info().1);
+
        // Rebalance the network a bit by relaying one payment through all the channels...
-       send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2])[..], 8000000, 8_000_000);
-       send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2])[..], 8000000, 8_000_000);
+       send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2])[..], 8000000);
+       send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2])[..], 8000000);
 
        let (our_payment_preimage, _payment_hash, _payment_secret) = route_payment(&nodes[0], &vec!(&nodes[1], &nodes[2]), 3000000);
        let (our_payment_preimage_2, _payment_hash_2, _payment_secret_2) = route_payment(&nodes[0], &vec!(&nodes[1], &nodes[2]), 3000000);
@@ -2743,8 +2757,8 @@ fn test_htlc_on_chain_success() {
        let commitment_tx = get_local_commitment_txn!(nodes[2], chan_2.2);
        assert_eq!(commitment_tx.len(), 1);
        check_spends!(commitment_tx[0], chan_2.3);
-       nodes[2].node.claim_funds(our_payment_preimage, &None, 3_000_000);
-       nodes[2].node.claim_funds(our_payment_preimage_2, &None, 3_000_000);
+       nodes[2].node.claim_funds(our_payment_preimage);
+       nodes[2].node.claim_funds(our_payment_preimage_2);
        check_added_monitors!(nodes[2], 2);
        let updates = get_htlc_update_msgs!(nodes[2], nodes[1].node.get_our_node_id());
        assert!(updates.update_add_htlcs.is_empty());
@@ -2772,6 +2786,7 @@ fn test_htlc_on_chain_success() {
        // Verify that B's ChannelManager is able to extract preimage from HTLC Success tx and pass it backward
        let header = BlockHeader { version: 0x20000000, prev_blockhash: nodes[1].best_block_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42};
        connect_block(&nodes[1], &Block { header, txdata: node_txn});
+       connect_blocks(&nodes[1], TEST_FINAL_CLTV - 1); // Confirm blocks until the HTLC expires
        {
                let mut added_monitors = nodes[1].chain_monitor.added_monitors.lock().unwrap();
                assert_eq!(added_monitors.len(), 1);
@@ -2809,34 +2824,26 @@ fn test_htlc_on_chain_success() {
        macro_rules! check_tx_local_broadcast {
                ($node: expr, $htlc_offered: expr, $commitment_tx: expr, $chan_tx: expr) => { {
                        let mut node_txn = $node.tx_broadcaster.txn_broadcasted.lock().unwrap();
-                       assert_eq!(node_txn.len(), 5);
+                       assert_eq!(node_txn.len(), 3);
                        // Node[1]: ChannelManager: 3 (commitment tx, 2*HTLC-Timeout tx), ChannelMonitor: 2 (timeout tx)
                        // Node[0]: ChannelManager: 3 (commtiemtn tx, 2*HTLC-Timeout tx), ChannelMonitor: 2 HTLC-timeout
-                       check_spends!(node_txn[0], $commitment_tx);
                        check_spends!(node_txn[1], $commitment_tx);
-                       assert_ne!(node_txn[0].lock_time, 0);
+                       check_spends!(node_txn[2], $commitment_tx);
                        assert_ne!(node_txn[1].lock_time, 0);
+                       assert_ne!(node_txn[2].lock_time, 0);
                        if $htlc_offered {
-                               assert_eq!(node_txn[0].input[0].witness.last().unwrap().len(), OFFERED_HTLC_SCRIPT_WEIGHT);
                                assert_eq!(node_txn[1].input[0].witness.last().unwrap().len(), OFFERED_HTLC_SCRIPT_WEIGHT);
-                               assert!(node_txn[0].output[0].script_pubkey.is_v0_p2wsh()); // revokeable output
+                               assert_eq!(node_txn[2].input[0].witness.last().unwrap().len(), OFFERED_HTLC_SCRIPT_WEIGHT);
                                assert!(node_txn[1].output[0].script_pubkey.is_v0_p2wsh()); // revokeable output
+                               assert!(node_txn[2].output[0].script_pubkey.is_v0_p2wsh()); // revokeable output
                        } else {
-                               assert_eq!(node_txn[0].input[0].witness.last().unwrap().len(), ACCEPTED_HTLC_SCRIPT_WEIGHT);
                                assert_eq!(node_txn[1].input[0].witness.last().unwrap().len(), ACCEPTED_HTLC_SCRIPT_WEIGHT);
-                               assert!(node_txn[0].output[0].script_pubkey.is_v0_p2wpkh()); // direct payment
+                               assert_eq!(node_txn[2].input[0].witness.last().unwrap().len(), ACCEPTED_HTLC_SCRIPT_WEIGHT);
                                assert!(node_txn[1].output[0].script_pubkey.is_v0_p2wpkh()); // direct payment
+                               assert!(node_txn[2].output[0].script_pubkey.is_v0_p2wpkh()); // direct payment
                        }
-                       check_spends!(node_txn[2], $chan_tx);
-                       check_spends!(node_txn[3], node_txn[2]);
-                       check_spends!(node_txn[4], node_txn[2]);
-                       assert_eq!(node_txn[2].input[0].witness.last().unwrap().len(), 71);
-                       assert_eq!(node_txn[3].input[0].witness.last().unwrap().len(), OFFERED_HTLC_SCRIPT_WEIGHT);
-                       assert_eq!(node_txn[4].input[0].witness.last().unwrap().len(), OFFERED_HTLC_SCRIPT_WEIGHT);
-                       assert!(node_txn[3].output[0].script_pubkey.is_v0_p2wsh()); // revokeable output
-                       assert!(node_txn[4].output[0].script_pubkey.is_v0_p2wsh()); // revokeable output
-                       assert_ne!(node_txn[3].lock_time, 0);
-                       assert_ne!(node_txn[4].lock_time, 0);
+                       check_spends!(node_txn[0], $chan_tx);
+                       assert_eq!(node_txn[0].input[0].witness.last().unwrap().len(), 71);
                        node_txn.clear();
                } }
        }
@@ -2847,29 +2854,43 @@ fn test_htlc_on_chain_success() {
 
        // Broadcast legit commitment tx from A on B's chain
        // Broadcast preimage tx by B on offered output from A commitment tx  on A's chain
-       let commitment_tx = get_local_commitment_txn!(nodes[0], chan_1.2);
-       check_spends!(commitment_tx[0], chan_1.3);
-       mine_transaction(&nodes[1], &commitment_tx[0]);
+       let node_a_commitment_tx = get_local_commitment_txn!(nodes[0], chan_1.2);
+       check_spends!(node_a_commitment_tx[0], chan_1.3);
+       mine_transaction(&nodes[1], &node_a_commitment_tx[0]);
        check_closed_broadcast!(nodes[1], true);
        check_added_monitors!(nodes[1], 1);
-       let node_txn = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().clone(); // ChannelManager : 3 (commitment tx + HTLC-Sucess * 2), ChannelMonitor : 1 (HTLC-Success)
-       assert_eq!(node_txn.len(), 4);
-       check_spends!(node_txn[0], commitment_tx[0]);
-       assert_eq!(node_txn[0].input.len(), 2);
-       assert_eq!(node_txn[0].input[0].witness.last().unwrap().len(), OFFERED_HTLC_SCRIPT_WEIGHT);
-       assert_eq!(node_txn[0].input[1].witness.last().unwrap().len(), OFFERED_HTLC_SCRIPT_WEIGHT);
-       assert_eq!(node_txn[0].lock_time, 0);
-       assert!(node_txn[0].output[0].script_pubkey.is_v0_p2wpkh()); // direct payment
-       check_spends!(node_txn[1], chan_1.3);
-       assert_eq!(node_txn[1].input[0].witness.clone().last().unwrap().len(), 71);
-       check_spends!(node_txn[2], node_txn[1]);
-       check_spends!(node_txn[3], node_txn[1]);
+       let node_txn = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().clone();
+       assert_eq!(node_txn.len(), 6); // ChannelManager : 3 (commitment tx + HTLC-Sucess * 2), ChannelMonitor : 3 (HTLC-Success, 2* RBF bumps of above HTLC txn)
+       let commitment_spend =
+               if node_txn[0].input[0].previous_output.txid == node_a_commitment_tx[0].txid() {
+                       check_spends!(node_txn[1], commitment_tx[0]);
+                       check_spends!(node_txn[2], commitment_tx[0]);
+                       assert_ne!(node_txn[1].input[0].previous_output.vout, node_txn[2].input[0].previous_output.vout);
+                       &node_txn[0]
+               } else {
+                       check_spends!(node_txn[0], commitment_tx[0]);
+                       check_spends!(node_txn[1], commitment_tx[0]);
+                       assert_ne!(node_txn[0].input[0].previous_output.vout, node_txn[1].input[0].previous_output.vout);
+                       &node_txn[2]
+               };
+
+       check_spends!(commitment_spend, node_a_commitment_tx[0]);
+       assert_eq!(commitment_spend.input.len(), 2);
+       assert_eq!(commitment_spend.input[0].witness.last().unwrap().len(), OFFERED_HTLC_SCRIPT_WEIGHT);
+       assert_eq!(commitment_spend.input[1].witness.last().unwrap().len(), OFFERED_HTLC_SCRIPT_WEIGHT);
+       assert_eq!(commitment_spend.lock_time, 0);
+       assert!(commitment_spend.output[0].script_pubkey.is_v0_p2wpkh()); // direct payment
+       check_spends!(node_txn[3], chan_1.3);
+       assert_eq!(node_txn[3].input[0].witness.clone().last().unwrap().len(), 71);
+       check_spends!(node_txn[4], node_txn[3]);
+       check_spends!(node_txn[5], node_txn[3]);
        // We don't bother to check that B can claim the HTLC output on its commitment tx here as
        // we already checked the same situation with A.
 
        // Verify that A's ChannelManager is able to extract preimage from preimage tx and generate PaymentSent
        let mut header = BlockHeader { version: 0x20000000, prev_blockhash: nodes[0].best_block_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42};
-       connect_block(&nodes[0], &Block { header, txdata: vec![commitment_tx[0].clone(), node_txn[0].clone()] });
+       connect_block(&nodes[0], &Block { header, txdata: vec![node_a_commitment_tx[0].clone(), commitment_spend.clone()] });
+       connect_blocks(&nodes[0], TEST_FINAL_CLTV + MIN_CLTV_EXPIRY_DELTA as u32 - 1); // Confirm blocks until the HTLC expires
        check_closed_broadcast!(nodes[0], true);
        check_added_monitors!(nodes[0], 1);
        let events = nodes[0].node.get_and_clear_pending_events();
@@ -2888,7 +2909,7 @@ fn test_htlc_on_chain_success() {
                        _ => panic!("Unexpected event"),
                }
        }
-       check_tx_local_broadcast!(nodes[0], true, commitment_tx[0], chan_1.3);
+       check_tx_local_broadcast!(nodes[0], true, node_a_commitment_tx[0], chan_1.3);
 }
 
 fn do_test_htlc_on_chain_timeout(connect_style: ConnectStyle) {
@@ -2913,15 +2934,15 @@ fn do_test_htlc_on_chain_timeout(connect_style: ConnectStyle) {
        let chan_2 = create_announced_chan_between_nodes(&nodes, 1, 2, InitFeatures::known(), InitFeatures::known());
 
        // Rebalance the network a bit by relaying one payment thorugh all the channels...
-       send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2])[..], 8000000, 8_000_000);
-       send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2])[..], 8000000, 8_000_000);
+       send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2])[..], 8000000);
+       send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2])[..], 8000000);
 
        let (_payment_preimage, payment_hash, _payment_secret) = route_payment(&nodes[0], &vec!(&nodes[1], &nodes[2]), 3000000);
 
        // Broadcast legit commitment tx from C on B's chain
        let commitment_tx = get_local_commitment_txn!(nodes[2], chan_2.2);
        check_spends!(commitment_tx[0], chan_2.3);
-       nodes[2].node.fail_htlc_backwards(&payment_hash, &None);
+       nodes[2].node.fail_htlc_backwards(&payment_hash);
        check_added_monitors!(nodes[2], 0);
        expect_pending_htlcs_forwardable!(nodes[2]);
        check_added_monitors!(nodes[2], 1);
@@ -2981,10 +3002,16 @@ 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]);
@@ -3007,17 +3034,16 @@ fn do_test_htlc_on_chain_timeout(connect_style: ConnectStyle) {
        check_spends!(commitment_tx[0], chan_1.3);
 
        mine_transaction(&nodes[0], &commitment_tx[0]);
+       connect_blocks(&nodes[0], TEST_FINAL_CLTV + MIN_CLTV_EXPIRY_DELTA as u32 - 1); // Confirm blocks until the HTLC expires
 
        check_closed_broadcast!(nodes[0], true);
        check_added_monitors!(nodes[0], 1);
-       let node_txn = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().clone(); // ChannelManager : 2 (commitment tx, HTLC-Timeout tx), ChannelMonitor : 1 timeout tx
-       assert_eq!(node_txn.len(), 3);
-       check_spends!(node_txn[0], commitment_tx[0]);
-       assert_eq!(node_txn[0].clone().input[0].witness.last().unwrap().len(), ACCEPTED_HTLC_SCRIPT_WEIGHT);
-       check_spends!(node_txn[1], chan_1.3);
-       check_spends!(node_txn[2], node_txn[1]);
-       assert_eq!(node_txn[1].clone().input[0].witness.last().unwrap().len(), 71);
-       assert_eq!(node_txn[2].clone().input[0].witness.last().unwrap().len(), OFFERED_HTLC_SCRIPT_WEIGHT);
+       let node_txn = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().clone(); // ChannelManager : 1 commitment tx, ChannelMonitor : 1 timeout tx
+       assert_eq!(node_txn.len(), 2);
+       check_spends!(node_txn[0], chan_1.3);
+       assert_eq!(node_txn[0].clone().input[0].witness.last().unwrap().len(), 71);
+       check_spends!(node_txn[1], commitment_tx[0]);
+       assert_eq!(node_txn[1].clone().input[0].witness.last().unwrap().len(), ACCEPTED_HTLC_SCRIPT_WEIGHT);
 }
 
 #[test]
@@ -3045,7 +3071,7 @@ fn test_simple_commitment_revoked_fail_backward() {
        // Get the will-be-revoked local txn from nodes[2]
        let revoked_local_txn = get_local_commitment_txn!(nodes[2], chan_2.2);
        // Revoke the old state
-       claim_payment(&nodes[0], &[&nodes[1], &nodes[2]], payment_preimage, 3_000_000);
+       claim_payment(&nodes[0], &[&nodes[1], &nodes[2]], payment_preimage);
 
        let (_, payment_hash, _) = route_payment(&nodes[0], &[&nodes[1], &nodes[2]], 3000000);
 
@@ -3068,13 +3094,7 @@ 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"),
@@ -3111,7 +3131,7 @@ fn do_test_commitment_revoked_fail_backward_exhaustive(deliver_bs_raa: bool, use
        let revoked_local_txn = get_local_commitment_txn!(nodes[2], chan_2.2);
        assert_eq!(revoked_local_txn[0].output.len(), if no_to_remote { 1 } else { 2 });
        // Revoke the old state
-       claim_payment(&nodes[0], &[&nodes[1], &nodes[2]], payment_preimage, if no_to_remote { 10_000 } else { 3_000_000});
+       claim_payment(&nodes[0], &[&nodes[1], &nodes[2]], payment_preimage);
 
        let value = if use_dust {
                // The dust limit applied to HTLC outputs considers the fee of the HTLC transaction as
@@ -3123,7 +3143,7 @@ fn do_test_commitment_revoked_fail_backward_exhaustive(deliver_bs_raa: bool, use
        let (_, second_payment_hash, _) = route_payment(&nodes[0], &[&nodes[1], &nodes[2]], value);
        let (_, third_payment_hash, _) = route_payment(&nodes[0], &[&nodes[1], &nodes[2]], value);
 
-       assert!(nodes[2].node.fail_htlc_backwards(&first_payment_hash, &None));
+       assert!(nodes[2].node.fail_htlc_backwards(&first_payment_hash));
        expect_pending_htlcs_forwardable!(nodes[2]);
        check_added_monitors!(nodes[2], 1);
        let updates = get_htlc_update_msgs!(nodes[2], nodes[1].node.get_our_node_id());
@@ -3136,7 +3156,7 @@ fn do_test_commitment_revoked_fail_backward_exhaustive(deliver_bs_raa: bool, use
        let bs_raa = commitment_signed_dance!(nodes[1], nodes[2], updates.commitment_signed, false, true, false, true);
        // Drop the last RAA from 3 -> 2
 
-       assert!(nodes[2].node.fail_htlc_backwards(&second_payment_hash, &None));
+       assert!(nodes[2].node.fail_htlc_backwards(&second_payment_hash));
        expect_pending_htlcs_forwardable!(nodes[2]);
        check_added_monitors!(nodes[2], 1);
        let updates = get_htlc_update_msgs!(nodes[2], nodes[1].node.get_our_node_id());
@@ -3153,7 +3173,7 @@ fn do_test_commitment_revoked_fail_backward_exhaustive(deliver_bs_raa: bool, use
        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.fail_htlc_backwards(&third_payment_hash, &None));
+       assert!(nodes[2].node.fail_htlc_backwards(&third_payment_hash));
        expect_pending_htlcs_forwardable!(nodes[2]);
        check_added_monitors!(nodes[2], 1);
        let updates = get_htlc_update_msgs!(nodes[2], nodes[1].node.get_our_node_id());
@@ -3178,7 +3198,7 @@ fn do_test_commitment_revoked_fail_backward_exhaustive(deliver_bs_raa: bool, use
        let net_graph_msg_handler = &nodes[1].net_graph_msg_handler;
        let logger = test_utils::TestLogger::new();
        let route = get_route(&nodes[1].node.get_our_node_id(), &net_graph_msg_handler.network_graph.read().unwrap(), &nodes[2].node.get_our_node_id(), Some(InvoiceFeatures::known()), None, &Vec::new(), 1000000, TEST_FINAL_CLTV, &logger).unwrap();
-       nodes[1].node.send_payment(&route, fourth_payment_hash, &None).unwrap();
+       nodes[1].node.send_payment(&route, fourth_payment_hash, &Some(fourth_payment_secret)).unwrap();
        assert!(nodes[1].node.get_and_clear_pending_msg_events().is_empty());
        assert!(nodes[1].node.get_and_clear_pending_events().is_empty());
        check_added_monitors!(nodes[1], 0);
@@ -3330,7 +3350,7 @@ fn fail_backward_pending_htlc_upon_channel_failure() {
                let (_, payment_hash, payment_secret) = get_payment_preimage_hash!(nodes[1]);
                let net_graph_msg_handler = &nodes[0].net_graph_msg_handler;
                let route = get_route(&nodes[0].node.get_our_node_id(), &net_graph_msg_handler.network_graph.read().unwrap(), &nodes[1].node.get_our_node_id(), Some(InvoiceFeatures::known()), None, &Vec::new(), 50_000, TEST_FINAL_CLTV, &logger).unwrap();
-               nodes[0].node.send_payment(&route, payment_hash, &None).unwrap();
+               nodes[0].node.send_payment(&route, payment_hash, &Some(payment_secret)).unwrap();
                check_added_monitors!(nodes[0], 1);
 
                let payment_event = {
@@ -3347,7 +3367,7 @@ fn fail_backward_pending_htlc_upon_channel_failure() {
        {
                let net_graph_msg_handler = &nodes[0].net_graph_msg_handler;
                let route = get_route(&nodes[0].node.get_our_node_id(), &net_graph_msg_handler.network_graph.read().unwrap(), &nodes[1].node.get_our_node_id(), Some(InvoiceFeatures::known()), None, &Vec::new(), 50_000, TEST_FINAL_CLTV, &logger).unwrap();
-               nodes[0].node.send_payment(&route, failed_payment_hash, &None).unwrap();
+               nodes[0].node.send_payment(&route, failed_payment_hash, &Some(failed_payment_secret)).unwrap();
                check_added_monitors!(nodes[0], 0);
 
                assert!(nodes[0].node.get_and_clear_pending_msg_events().is_empty());
@@ -3362,7 +3382,7 @@ 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, &None, 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).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);
 
@@ -3396,11 +3416,13 @@ fn test_htlc_ignore_latest_remote_commitment() {
 
        route_payment(&nodes[0], &[&nodes[1]], 10000000);
        nodes[0].node.force_close_channel(&nodes[0].node.list_channels()[0].channel_id).unwrap();
+       connect_blocks(&nodes[0], TEST_FINAL_CLTV + LATENCY_GRACE_PERIOD_BLOCKS + 1);
        check_closed_broadcast!(nodes[0], true);
        check_added_monitors!(nodes[0], 1);
 
        let node_txn = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap();
-       assert_eq!(node_txn.len(), 2);
+       assert_eq!(node_txn.len(), 3);
+       assert_eq!(node_txn[0], node_txn[1]);
 
        let mut header = BlockHeader { version: 0x20000000, prev_blockhash: nodes[1].best_block_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
        connect_block(&nodes[1], &Block { header, txdata: vec![node_txn[0].clone(), node_txn[1].clone()]});
@@ -3410,7 +3432,7 @@ fn test_htlc_ignore_latest_remote_commitment() {
        // Duplicate the connect_block call since this may happen due to other listeners
        // registering new transactions
        header.prev_blockhash = header.block_hash();
-       connect_block(&nodes[1], &Block { header, txdata: vec![node_txn[0].clone(), node_txn[1].clone()]});
+       connect_block(&nodes[1], &Block { header, txdata: vec![node_txn[0].clone(), node_txn[2].clone()]});
 }
 
 #[test]
@@ -3429,7 +3451,7 @@ fn test_force_close_fail_back() {
        let mut payment_event = {
                let net_graph_msg_handler = &nodes[0].net_graph_msg_handler;
                let route = get_route(&nodes[0].node.get_our_node_id(), &net_graph_msg_handler.network_graph.read().unwrap(), &nodes[2].node.get_our_node_id(), Some(InvoiceFeatures::known()), None, &Vec::new(), 1000000, 42, &logger).unwrap();
-               nodes[0].node.send_payment(&route, our_payment_hash, &None).unwrap();
+               nodes[0].node.send_payment(&route, our_payment_hash, &Some(our_payment_secret)).unwrap();
                check_added_monitors!(nodes[0], 1);
 
                let mut events = nodes[0].node.get_and_clear_pending_msg_events();
@@ -3492,6 +3514,34 @@ fn test_force_close_fail_back() {
        check_spends!(node_txn[0], tx);
 }
 
+#[test]
+fn test_dup_events_on_peer_disconnect() {
+       // Test that if we receive a duplicative update_fulfill_htlc message after a reconnect we do
+       // not generate a corresponding duplicative PaymentSent event. This did not use to be the case
+       // as we used to generate the event immediately upon receipt of the payment preimage in the
+       // update_fulfill_htlc message.
+
+       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);
+       create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known());
+
+       let payment_preimage = route_payment(&nodes[0], &[&nodes[1]], 1000000).0;
+
+       assert!(nodes[1].node.claim_funds(payment_preimage));
+       check_added_monitors!(nodes[1], 1);
+       let claim_msgs = 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(), &claim_msgs.update_fulfill_htlcs[0]);
+       expect_payment_sent!(nodes[0], payment_preimage);
+
+       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));
+       assert!(nodes[0].node.get_and_clear_pending_events().is_empty());
+}
+
 #[test]
 fn test_simple_peer_disconnect() {
        // Test that we can reconnect when there are no lost messages
@@ -3509,7 +3559,7 @@ fn test_simple_peer_disconnect() {
        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;
        fail_payment(&nodes[0], &vec!(&nodes[1], &nodes[2]), payment_hash_2);
-       claim_payment(&nodes[0], &vec!(&nodes[1], &nodes[2]), payment_preimage_1, 1_000_000);
+       claim_payment(&nodes[0], &vec!(&nodes[1], &nodes[2]), payment_preimage_1);
 
        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);
@@ -3523,7 +3573,7 @@ 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);
 
-       claim_payment_along_route(&nodes[0], &vec!(&nodes[1], &nodes[2]), true, payment_preimage_3, 1_000_000);
+       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));
@@ -3545,19 +3595,24 @@ fn test_simple_peer_disconnect() {
                }
        }
 
-       claim_payment(&nodes[0], &vec!(&nodes[1], &nodes[2]), payment_preimage_4, 1_000_000);
+       claim_payment(&nodes[0], &vec!(&nodes[1], &nodes[2]), payment_preimage_4);
        fail_payment(&nodes[0], &vec!(&nodes[1], &nodes[2]), payment_hash_6);
 }
 
-fn do_test_drop_messages_peer_disconnect(messages_delivered: u8) {
+fn do_test_drop_messages_peer_disconnect(messages_delivered: u8, simulate_broken_lnd: bool) {
        // Test that we can reconnect when in-flight HTLC updates get dropped
        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);
+
+       let mut as_funding_locked = None;
        if messages_delivered == 0 {
-               create_chan_between_nodes_with_value_a(&nodes[0], &nodes[1], 100000, 10001, InitFeatures::known(), InitFeatures::known());
+               let (funding_locked, _, _) = create_chan_between_nodes_with_value_a(&nodes[0], &nodes[1], 100000, 10001, InitFeatures::known(), InitFeatures::known());
+               as_funding_locked = Some(funding_locked);
                // nodes[1] doesn't receive the funding_locked message (it'll be re-sent on reconnect)
+               // Note that we store it so that if we're running with `simulate_broken_lnd` we can deliver
+               // it before the channel_reestablish message.
        } else {
                create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known());
        }
@@ -3570,7 +3625,7 @@ fn do_test_drop_messages_peer_disconnect(messages_delivered: u8) {
                let route = get_route(&nodes[0].node.get_our_node_id(), &net_graph_msg_handler.network_graph.read().unwrap(),
                        &nodes[1].node.get_our_node_id(), Some(InvoiceFeatures::known()), Some(&nodes[0].node.list_usable_channels().iter().collect::<Vec<_>>()),
                        &Vec::new(), 1000000, TEST_FINAL_CLTV, &logger).unwrap();
-               nodes[0].node.send_payment(&route, payment_hash_1, &None).unwrap();
+               nodes[0].node.send_payment(&route, payment_hash_1, &Some(payment_secret_1)).unwrap();
                check_added_monitors!(nodes[0], 1);
 
                let mut events = nodes[0].node.get_and_clear_pending_msg_events();
@@ -3612,6 +3667,17 @@ fn do_test_drop_messages_peer_disconnect(messages_delivered: u8) {
        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 < 3 {
+               if simulate_broken_lnd {
+                       // lnd has a long-standing bug where they send a funding_locked prior to a
+                       // channel_reestablish if you reconnect prior to funding_locked time.
+                       //
+                       // Here we simulate that behavior, delivering a funding_locked immediately on
+                       // reconnect. Note that we don't bother skipping the now-duplicate funding_locked sent
+                       // in `reconnect_nodes` but we currently don't fail based on that.
+                       //
+                       // See-also <https://github.com/lightningnetwork/lnd/issues/4006>
+                       nodes[1].node.handle_funding_locked(&nodes[0].node.get_our_node_id(), &as_funding_locked.as_ref().unwrap().0);
+               }
                // 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));
@@ -3645,15 +3711,16 @@ fn do_test_drop_messages_peer_disconnect(messages_delivered: u8) {
        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_secret, amt } => {
+               Event::PaymentReceived { ref payment_hash, ref payment_preimage, ref payment_secret, amt, user_payment_id: _ } => {
                        assert_eq!(payment_hash_1, *payment_hash);
-                       assert_eq!(*payment_secret, None);
+                       assert!(payment_preimage.is_none());
+                       assert_eq!(payment_secret_1, *payment_secret);
                        assert_eq!(amt, 1000000);
                },
                _ => panic!("Unexpected event"),
        }
 
-       nodes[1].node.claim_funds(payment_preimage_1, &None, 1_000_000);
+       nodes[1].node.claim_funds(payment_preimage_1);
        check_added_monitors!(nodes[1], 1);
 
        let events_3 = nodes[1].node.get_and_clear_pending_msg_events();
@@ -3713,8 +3780,7 @@ fn do_test_drop_messages_peer_disconnect(messages_delivered: u8) {
        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));
-               //TODO: Deduplicate PaymentSent events, then enable this if:
-               //if messages_delivered < 1 {
+               if messages_delivered < 1 {
                        let events_4 = nodes[0].node.get_and_clear_pending_events();
                        assert_eq!(events_4.len(), 1);
                        match events_4[0] {
@@ -3723,7 +3789,9 @@ fn do_test_drop_messages_peer_disconnect(messages_delivered: u8) {
                                },
                                _ => panic!("Unexpected event"),
                        }
-               //}
+               } else {
+                       assert!(nodes[0].node.get_and_clear_pending_msg_events().is_empty());
+               }
        } 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));
@@ -3748,22 +3816,23 @@ fn do_test_drop_messages_peer_disconnect(messages_delivered: u8) {
                &nodes[1].node.get_our_node_id(), Some(InvoiceFeatures::known()), Some(&nodes[0].node.list_usable_channels().iter().collect::<Vec<_>>()),
                &Vec::new(), 1000000, TEST_FINAL_CLTV, &logger).unwrap();
        let payment_preimage_2 = send_along_route(&nodes[0], route, &[&nodes[1]], 1000000).0;
-       claim_payment(&nodes[0], &[&nodes[1]], payment_preimage_2, 1_000_000);
+       claim_payment(&nodes[0], &[&nodes[1]], payment_preimage_2);
 }
 
 #[test]
 fn test_drop_messages_peer_disconnect_a() {
-       do_test_drop_messages_peer_disconnect(0);
-       do_test_drop_messages_peer_disconnect(1);
-       do_test_drop_messages_peer_disconnect(2);
-       do_test_drop_messages_peer_disconnect(3);
+       do_test_drop_messages_peer_disconnect(0, true);
+       do_test_drop_messages_peer_disconnect(0, false);
+       do_test_drop_messages_peer_disconnect(1, false);
+       do_test_drop_messages_peer_disconnect(2, false);
 }
 
 #[test]
 fn test_drop_messages_peer_disconnect_b() {
-       do_test_drop_messages_peer_disconnect(4);
-       do_test_drop_messages_peer_disconnect(5);
-       do_test_drop_messages_peer_disconnect(6);
+       do_test_drop_messages_peer_disconnect(3, false);
+       do_test_drop_messages_peer_disconnect(4, false);
+       do_test_drop_messages_peer_disconnect(5, false);
+       do_test_drop_messages_peer_disconnect(6, false);
 }
 
 #[test]
@@ -3772,7 +3841,10 @@ fn test_funding_peer_disconnect() {
        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 persister: test_utils::TestPersister;
+       let new_chain_monitor: test_utils::TestChainMonitor;
+       let nodes_0_deserialized: ChannelManager<EnforcingSigner, &test_utils::TestChainMonitor, &test_utils::TestBroadcaster, &test_utils::TestKeysInterface, &test_utils::TestFeeEstimator, &test_utils::TestLogger>;
+       let mut nodes = create_network(2, &node_cfgs, &node_chanmgrs);
        let tx = create_chan_between_nodes_with_value_init(&nodes[0], &nodes[1], 100000, 10001, InitFeatures::known(), InitFeatures::known());
 
        nodes[0].node.peer_disconnected(&nodes[1].node.get_our_node_id(), false);
@@ -3849,7 +3921,62 @@ fn test_funding_peer_disconnect() {
        let logger = test_utils::TestLogger::new();
        let route = get_route(&nodes[0].node.get_our_node_id(), &net_graph_msg_handler.network_graph.read().unwrap(), &nodes[1].node.get_our_node_id(), Some(InvoiceFeatures::known()), None, &Vec::new(), 1000000, TEST_FINAL_CLTV, &logger).unwrap();
        let (payment_preimage, _, _) = send_along_route(&nodes[0], route, &[&nodes[1]], 1000000);
-       claim_payment(&nodes[0], &[&nodes[1]], payment_preimage, 1_000_000);
+       claim_payment(&nodes[0], &[&nodes[1]], payment_preimage);
+
+       // Check that after deserialization and reconnection we can still generate an identical
+       // channel_announcement from the cached signatures.
+       nodes[1].node.peer_disconnected(&nodes[0].node.get_our_node_id(), false);
+
+       let nodes_0_serialized = nodes[0].node.encode();
+       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();
+
+       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(), nodes[0].logger, node_cfgs[0].fee_estimator, &persister, keys_manager);
+       nodes[0].chain_monitor = &new_chain_monitor;
+       let mut chan_0_monitor_read = &chan_0_monitor_serialized.0[..];
+       let (_, mut chan_0_monitor) = <(BlockHash, ChannelMonitor<EnforcingSigner>)>::read(
+               &mut chan_0_monitor_read, keys_manager).unwrap();
+       assert!(chan_0_monitor_read.is_empty());
+
+       let mut nodes_0_read = &nodes_0_serialized[..];
+       let (_, nodes_0_deserialized_tmp) = {
+               let mut channel_monitors = HashMap::new();
+               channel_monitors.insert(chan_0_monitor.get_funding_txo().0, &mut chan_0_monitor);
+               <(BlockHash, ChannelManager<EnforcingSigner, &test_utils::TestChainMonitor, &test_utils::TestBroadcaster, &test_utils::TestKeysInterface, &test_utils::TestFeeEstimator, &test_utils::TestLogger>)>::read(&mut nodes_0_read, ChannelManagerReadArgs {
+                       default_config: UserConfig::default(),
+                       keys_manager,
+                       fee_estimator: node_cfgs[0].fee_estimator,
+                       chain_monitor: nodes[0].chain_monitor,
+                       tx_broadcaster: nodes[0].tx_broadcaster.clone(),
+                       logger: nodes[0].logger,
+                       channel_monitors,
+               }).unwrap()
+       };
+       nodes_0_deserialized = nodes_0_deserialized_tmp;
+       assert!(nodes_0_read.is_empty());
+
+       assert!(nodes[0].chain_monitor.watch_channel(chan_0_monitor.get_funding_txo().0, chan_0_monitor).is_ok());
+       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));
+
+       // as_announcement should be re-generated exactly by broadcast_node_announcement.
+       nodes[0].node.broadcast_node_announcement([0, 0, 0], [0; 32], Vec::new());
+       let msgs = nodes[0].node.get_and_clear_pending_msg_events();
+       let mut found_announcement = false;
+       for event in msgs.iter() {
+               match event {
+                       MessageSendEvent::BroadcastChannelAnnouncement { ref msg, .. } => {
+                               if *msg == as_announcement { found_announcement = true; }
+                       },
+                       MessageSendEvent::BroadcastNodeAnnouncement { .. } => {},
+                       _ => panic!("Unexpected event"),
+               }
+       }
+       assert!(found_announcement);
 }
 
 #[test]
@@ -3869,7 +3996,7 @@ fn test_drop_messages_peer_disconnect_dual_htlc() {
        let (payment_preimage_2, payment_hash_2, payment_secret_2) = get_payment_preimage_hash!(nodes[1]);
        let net_graph_msg_handler = &nodes[0].net_graph_msg_handler;
        let route = get_route(&nodes[0].node.get_our_node_id(), &net_graph_msg_handler.network_graph.read().unwrap(), &nodes[1].node.get_our_node_id(), Some(InvoiceFeatures::known()), None, &Vec::new(), 1000000, TEST_FINAL_CLTV, &logger).unwrap();
-       nodes[0].node.send_payment(&route, payment_hash_2, &None).unwrap();
+       nodes[0].node.send_payment(&route, payment_hash_2, &Some(payment_secret_2)).unwrap();
        check_added_monitors!(nodes[0], 1);
 
        let events_1 = nodes[0].node.get_and_clear_pending_msg_events();
@@ -3879,7 +4006,7 @@ fn test_drop_messages_peer_disconnect_dual_htlc() {
                _ => panic!("Unexpected event"),
        }
 
-       assert!(nodes[1].node.claim_funds(payment_preimage_1, &None, 1_000_000));
+       assert!(nodes[1].node.claim_funds(payment_preimage_1));
        check_added_monitors!(nodes[1], 1);
 
        let events_2 = nodes[1].node.get_and_clear_pending_msg_events();
@@ -3982,9 +4109,10 @@ 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_secret, amt: _ } => {
+               Event::PaymentReceived { ref payment_hash, ref payment_preimage, ref payment_secret, amt: _, user_payment_id: _ } => {
                        assert_eq!(payment_hash_2, *payment_hash);
-                       assert_eq!(*payment_secret, None);
+                       assert!(payment_preimage.is_none());
+                       assert_eq!(payment_secret_2, *payment_secret);
                },
                _ => panic!("Unexpected event"),
        }
@@ -3993,7 +4121,7 @@ fn test_drop_messages_peer_disconnect_dual_htlc() {
        assert!(nodes[0].node.get_and_clear_pending_msg_events().is_empty());
        check_added_monitors!(nodes[0], 1);
 
-       claim_payment(&nodes[0], &[&nodes[1]], payment_preimage_2, 1_000_000);
+       claim_payment(&nodes[0], &[&nodes[1]], payment_preimage_2);
 }
 
 fn do_test_htlc_timeout(send_partial_mpp: bool) {
@@ -4020,7 +4148,7 @@ fn do_test_htlc_timeout(send_partial_mpp: bool) {
                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, Some(payment_secret), events.drain(..).next().unwrap(), false);
+               pass_along_path(&nodes[0], &[&nodes[1]], 100000, our_payment_hash, payment_secret, events.drain(..).next().unwrap(), false);
                our_payment_hash
        } else {
                route_payment(&nodes[0], &[&nodes[1]], 100000).1
@@ -4032,7 +4160,8 @@ fn do_test_htlc_timeout(send_partial_mpp: bool) {
        };
        connect_block(&nodes[0], &block);
        connect_block(&nodes[1], &block);
-       for _ in CHAN_CONFIRM_DEPTH + 2 ..TEST_FINAL_CLTV + CHAN_CONFIRM_DEPTH + 2 - CLTV_CLAIM_BUFFER - LATENCY_GRACE_PERIOD_BLOCKS {
+       let block_count = TEST_FINAL_CLTV + CHAN_CONFIRM_DEPTH + 2 - CLTV_CLAIM_BUFFER - LATENCY_GRACE_PERIOD_BLOCKS;
+       for _ in CHAN_CONFIRM_DEPTH + 2..block_count {
                block.header.prev_blockhash = block.block_hash();
                connect_block(&nodes[0], &block);
                connect_block(&nodes[1], &block);
@@ -4049,9 +4178,9 @@ fn do_test_htlc_timeout(send_partial_mpp: bool) {
 
        nodes[0].node.handle_update_fail_htlc(&nodes[1].node.get_our_node_id(), &htlc_timeout_updates.update_fail_htlcs[0]);
        commitment_signed_dance!(nodes[0], nodes[1], htlc_timeout_updates.commitment_signed, false);
-       // 100_000 msat as u64, followed by a height of TEST_FINAL_CLTV + 2 as u32
+       // 100_000 msat as u64, followed by the height at which we failed back above
        let mut expected_failure_data = byte_utils::be64_to_array(100_000).to_vec();
-       expected_failure_data.extend_from_slice(&byte_utils::be32_to_array(TEST_FINAL_CLTV + 2));
+       expected_failure_data.extend_from_slice(&byte_utils::be32_to_array(block_count - 1));
        expect_payment_failed!(nodes[0], our_payment_hash, true, 0x4000 | 15, &expected_failure_data[..]);
 }
 
@@ -4068,7 +4197,7 @@ 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);
@@ -4082,7 +4211,7 @@ fn do_test_holding_cell_htlc_add_timeouts(forwarded_htlc: bool) {
        {
                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[2].node.get_our_node_id(), Some(InvoiceFeatures::known()), None, &Vec::new(), 100000, TEST_FINAL_CLTV, &logger).unwrap();
-               nodes[1].node.send_payment(&route, first_payment_hash, &None).unwrap();
+               nodes[1].node.send_payment(&route, first_payment_hash, &Some(first_payment_secret)).unwrap();
        }
        assert_eq!(nodes[1].node.get_and_clear_pending_msg_events().len(), 1);
        check_added_monitors!(nodes[1], 1);
@@ -4092,7 +4221,7 @@ fn do_test_holding_cell_htlc_add_timeouts(forwarded_htlc: bool) {
        if forwarded_htlc {
                let net_graph_msg_handler = &nodes[0].net_graph_msg_handler;
                let route = get_route(&nodes[0].node.get_our_node_id(), &net_graph_msg_handler.network_graph.read().unwrap(), &nodes[2].node.get_our_node_id(), Some(InvoiceFeatures::known()), None, &Vec::new(), 100000, TEST_FINAL_CLTV, &logger).unwrap();
-               nodes[0].node.send_payment(&route, second_payment_hash, &None).unwrap();
+               nodes[0].node.send_payment(&route, second_payment_hash, &Some(first_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]);
@@ -4102,7 +4231,7 @@ fn do_test_holding_cell_htlc_add_timeouts(forwarded_htlc: bool) {
        } else {
                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[2].node.get_our_node_id(), Some(InvoiceFeatures::known()), None, &Vec::new(), 100000, TEST_FINAL_CLTV, &logger).unwrap();
-               nodes[1].node.send_payment(&route, second_payment_hash, &None).unwrap();
+               nodes[1].node.send_payment(&route, second_payment_hash, &Some(second_payment_secret)).unwrap();
                check_added_monitors!(nodes[1], 0);
        }
 
@@ -4124,14 +4253,7 @@ 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);
        }
@@ -4292,7 +4414,114 @@ fn test_no_txn_manager_serialize_deserialize() {
                node.net_graph_msg_handler.handle_channel_update(&bs_update).unwrap();
        }
 
-       send_payment(&nodes[0], &[&nodes[1]], 1000000, 1_000_000);
+       send_payment(&nodes[0], &[&nodes[1]], 1000000);
+}
+
+#[test]
+fn test_dup_htlc_onchain_fails_on_reload() {
+       // When a Channel is closed, any outbound HTLCs which were relayed through it are simply
+       // dropped when the Channel is. From there, the ChannelManager relies on the ChannelMonitor
+       // having a copy of the relevant fail-/claim-back data and processes the HTLC fail/claim when
+       // the ChannelMonitor tells it to.
+       //
+       // If, due to an on-chain event, an HTLC is failed/claimed, and then we serialize the
+       // ChannelManager, we generally expect there not to be a duplicate HTLC fail/claim (eg via a
+       // PaymentFailed event appearing). However, because we may not serialize the relevant
+       // ChannelMonitor at the same time, this isn't strictly guaranteed. In order to provide this
+       // consistency, the ChannelManager explicitly tracks pending-onchain-resolution outbound HTLCs
+       // and de-duplicates ChannelMonitor events.
+       //
+       // This tests that explicit tracking behavior.
+       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 persister: test_utils::TestPersister;
+       let new_chain_monitor: test_utils::TestChainMonitor;
+       let nodes_0_deserialized: ChannelManager<EnforcingSigner, &test_utils::TestChainMonitor, &test_utils::TestBroadcaster, &test_utils::TestKeysInterface, &test_utils::TestFeeEstimator, &test_utils::TestLogger>;
+       let mut nodes = create_network(2, &node_cfgs, &node_chanmgrs);
+
+       create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known());
+
+       // Route a payment, but force-close the channel before the HTLC fulfill message arrives at
+       // nodes[0].
+       let (payment_preimage, _, _) = route_payment(&nodes[0], &[&nodes[1]], 10000000);
+       nodes[0].node.force_close_channel(&nodes[0].node.list_channels()[0].channel_id).unwrap();
+       check_closed_broadcast!(nodes[0], true);
+       check_added_monitors!(nodes[0], 1);
+
+       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);
+
+       // Connect blocks until the CLTV timeout is up so that we get an HTLC-Timeout transaction
+       connect_blocks(&nodes[0], TEST_FINAL_CLTV + LATENCY_GRACE_PERIOD_BLOCKS + 1);
+       let node_txn = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0);
+       assert_eq!(node_txn.len(), 3);
+       assert_eq!(node_txn[0], node_txn[1]);
+
+       assert!(nodes[1].node.claim_funds(payment_preimage));
+       check_added_monitors!(nodes[1], 1);
+
+       let mut header = BlockHeader { version: 0x20000000, prev_blockhash: nodes[1].best_block_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
+       connect_block(&nodes[1], &Block { header, txdata: vec![node_txn[1].clone(), node_txn[2].clone()]});
+       check_closed_broadcast!(nodes[1], true);
+       check_added_monitors!(nodes[1], 1);
+       let claim_txn = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0);
+
+       header.prev_blockhash = nodes[0].best_block_hash();
+       connect_block(&nodes[0], &Block { header, txdata: vec![node_txn[1].clone(), node_txn[2].clone()]});
+
+       // Serialize out the ChannelMonitor before connecting the on-chain claim transactions. This is
+       // fairly normal behavior as ChannelMonitor(s) are often not re-serialized when on-chain events
+       // happen, unlike ChannelManager which tends to be re-serialized after any relevant event(s).
+       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();
+
+       header.prev_blockhash = nodes[0].best_block_hash();
+       let claim_block = Block { header, txdata: claim_txn};
+       connect_block(&nodes[0], &claim_block);
+       expect_payment_sent!(nodes[0], payment_preimage);
+
+       // ChannelManagers generally get re-serialized after any relevant event(s). Since we just
+       // connected a highly-relevant block, it likely gets serialized out now.
+       let mut chan_manager_serialized = test_utils::TestVecWriter(Vec::new());
+       nodes[0].node.write(&mut chan_manager_serialized).unwrap();
+
+       // Now reload nodes[0]...
+       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(), nodes[0].logger, node_cfgs[0].fee_estimator, &persister, keys_manager);
+       nodes[0].chain_monitor = &new_chain_monitor;
+       let mut chan_0_monitor_read = &chan_0_monitor_serialized.0[..];
+       let (_, mut chan_0_monitor) = <(BlockHash, ChannelMonitor<EnforcingSigner>)>::read(
+               &mut chan_0_monitor_read, keys_manager).unwrap();
+       assert!(chan_0_monitor_read.is_empty());
+
+       let (_, nodes_0_deserialized_tmp) = {
+               let mut channel_monitors = HashMap::new();
+               channel_monitors.insert(chan_0_monitor.get_funding_txo().0, &mut chan_0_monitor);
+               <(BlockHash, ChannelManager<EnforcingSigner, &test_utils::TestChainMonitor, &test_utils::TestBroadcaster, &test_utils::TestKeysInterface, &test_utils::TestFeeEstimator, &test_utils::TestLogger>)>
+                       ::read(&mut std::io::Cursor::new(&chan_manager_serialized.0[..]), ChannelManagerReadArgs {
+                               default_config: Default::default(),
+                               keys_manager,
+                               fee_estimator: node_cfgs[0].fee_estimator,
+                               chain_monitor: nodes[0].chain_monitor,
+                               tx_broadcaster: nodes[0].tx_broadcaster.clone(),
+                               logger: nodes[0].logger,
+                               channel_monitors,
+                       }).unwrap()
+       };
+       nodes_0_deserialized = nodes_0_deserialized_tmp;
+
+       assert!(nodes[0].chain_monitor.watch_channel(chan_0_monitor.get_funding_txo().0, chan_0_monitor).is_ok());
+       check_added_monitors!(nodes[0], 1);
+       nodes[0].node = &nodes_0_deserialized;
+
+       // Note that if we re-connect the block which exposed nodes[0] to the payment preimage (but
+       // which the current ChannelMonitor has not seen), the ChannelManager's de-duplication of
+       // payment events should kick in, leaving us with no pending events here.
+       let height = nodes[0].blocks.lock().unwrap().len() as u32 - 1;
+       nodes[0].chain_monitor.chain_monitor.block_connected(&claim_block, height);
+       assert!(nodes[0].node.get_and_clear_pending_events().is_empty());
 }
 
 #[test]
@@ -4411,7 +4640,7 @@ fn test_manager_serialize_deserialize_events() {
                node.net_graph_msg_handler.handle_channel_update(&bs_update).unwrap();
        }
 
-       send_payment(&nodes[0], &[&nodes[1]], 1000000, 1_000_000);
+       send_payment(&nodes[0], &[&nodes[1]], 1000000);
 }
 
 #[test]
@@ -4471,7 +4700,7 @@ fn test_simple_manager_serialize_deserialize() {
        reconnect_nodes(&nodes[0], &nodes[1], (false, false), (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, 1_000_000);
+       claim_payment(&nodes[0], &[&nodes[1]], our_payment_preimage);
 }
 
 #[test]
@@ -4568,11 +4797,11 @@ fn test_manager_serialize_deserialize_inconsistent_monitor() {
        nodes_0_deserialized = nodes_0_deserialized_tmp;
        assert!(nodes_0_read.is_empty());
 
-       { // Channel close should result in a commitment tx and an HTLC tx
+       { // Channel close should result in a commitment tx
                let txn = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap();
-               assert_eq!(txn.len(), 2);
+               assert_eq!(txn.len(), 1);
+               check_spends!(txn[0], funding_tx);
                assert_eq!(txn[0].input[0].previous_output.txid, funding_tx.txid());
-               assert_eq!(txn[1].input[0].previous_output.txid, txn[0].txid());
        }
 
        for monitor in node_0_monitors.drain(..) {
@@ -4585,7 +4814,7 @@ fn test_manager_serialize_deserialize_inconsistent_monitor() {
        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));
        //... and we can even still claim the payment!
-       claim_payment(&nodes[2], &[&nodes[0], &nodes[1]], our_payment_preimage, 1_000_000);
+       claim_payment(&nodes[2], &[&nodes[0], &nodes[1]], our_payment_preimage);
 
        nodes[3].node.peer_connected(&nodes[0].node.get_our_node_id(), &msgs::Init { features: InitFeatures::empty() });
        let reestablish = get_event_msg!(nodes[3], MessageSendEvent::SendChannelReestablish, nodes[0].node.get_our_node_id());
@@ -4604,7 +4833,7 @@ 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();
@@ -4649,11 +4878,13 @@ fn test_claim_sizeable_push_msat() {
        assert_eq!(node_txn[0].output.len(), 2); // We can't force trimming of to_remote output as channel_reserve_satoshis block us to do so at channel opening
 
        mine_transaction(&nodes[1], &node_txn[0]);
-       connect_blocks(&nodes[1], ANTI_REORG_DELAY - 1);
+       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]);
+       assert_eq!(spend_txn[0].input[0].sequence, BREAKDOWN_TIMEOUT as u32);
 }
 
 #[test]
@@ -4680,7 +4911,7 @@ 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]);
 }
@@ -4701,7 +4932,7 @@ fn test_claim_on_remote_revoked_sizeable_push_msat() {
        assert_eq!(revoked_local_txn[0].input.len(), 1);
        assert_eq!(revoked_local_txn[0].input[0].previous_output.txid, chan.3.txid());
 
-       claim_payment(&nodes[0], &vec!(&nodes[1])[..], payment_preimage, 3_000_000);
+       claim_payment(&nodes[0], &vec!(&nodes[1])[..], payment_preimage);
        mine_transaction(&nodes[1], &revoked_local_txn[0]);
        check_closed_broadcast!(nodes[1], true);
        check_added_monitors!(nodes[1], 1);
@@ -4710,7 +4941,7 @@ 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]);
@@ -4734,7 +4965,7 @@ fn test_static_spendable_outputs_preimage_tx() {
        assert_eq!(commitment_tx[0].input[0].previous_output.txid, chan_1.3.txid());
 
        // Settle A's commitment tx on B's chain
-       assert!(nodes[1].node.claim_funds(payment_preimage, &None, 3_000_000));
+       assert!(nodes[1].node.claim_funds(payment_preimage));
        check_added_monitors!(nodes[1], 1);
        mine_transaction(&nodes[1], &commitment_tx[0]);
        check_added_monitors!(nodes[1], 1);
@@ -4759,7 +4990,7 @@ 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]);
 }
@@ -4775,7 +5006,7 @@ fn test_static_spendable_outputs_timeout_tx() {
        let chan_1 = create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known());
 
        // Rebalance the network a bit by relaying one payment through all the channels ...
-       send_payment(&nodes[0], &vec!(&nodes[1])[..], 8000000, 8_000_000);
+       send_payment(&nodes[0], &vec!(&nodes[1])[..], 8000000);
 
        let (_, our_payment_hash, _) = route_payment(&nodes[1], &vec!(&nodes[0])[..], 3_000_000);
 
@@ -4791,24 +5022,24 @@ fn test_static_spendable_outputs_timeout_tx() {
                MessageSendEvent::BroadcastChannelUpdate { .. } => {},
                _ => panic!("Unexpected event"),
        }
+       connect_blocks(&nodes[1], TEST_FINAL_CLTV - 1); // Confirm blocks until the HTLC expires
 
        // Check B's monitor was able to send back output descriptor event for timeout tx on A's commitment tx
-       let node_txn = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap();
-       assert_eq!(node_txn.len(), 3); // ChannelManager : 2 (local commitent tx + HTLC-timeout), ChannelMonitor: timeout tx
-       check_spends!(node_txn[0],  commitment_tx[0].clone());
-       assert_eq!(node_txn[0].input[0].witness.last().unwrap().len(), ACCEPTED_HTLC_SCRIPT_WEIGHT);
-       check_spends!(node_txn[1], chan_1.3.clone());
-       check_spends!(node_txn[2], node_txn[1]);
+       let node_txn = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0);
+       assert_eq!(node_txn.len(), 2); // ChannelManager : 1 local commitent tx, ChannelMonitor: timeout tx
+       check_spends!(node_txn[0], chan_1.3.clone());
+       check_spends!(node_txn[1],  commitment_tx[0].clone());
+       assert_eq!(node_txn[1].input[0].witness.last().unwrap().len(), ACCEPTED_HTLC_SCRIPT_WEIGHT);
 
-       mine_transaction(&nodes[1], &node_txn[0]);
+       mine_transaction(&nodes[1], &node_txn[1]);
        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[0]);
-       check_spends!(spend_txn[2], node_txn[0], commitment_tx[0]); // All outputs
+       check_spends!(spend_txn[1], node_txn[1]);
+       check_spends!(spend_txn[2], node_txn[1], commitment_tx[0]); // All outputs
 }
 
 #[test]
@@ -4826,7 +5057,7 @@ fn test_static_spendable_outputs_justice_tx_revoked_commitment_tx() {
        assert_eq!(revoked_local_txn[0].input.len(), 1);
        assert_eq!(revoked_local_txn[0].input[0].previous_output.txid, chan_1.3.txid());
 
-       claim_payment(&nodes[0], &vec!(&nodes[1])[..], payment_preimage, 3_000_000);
+       claim_payment(&nodes[0], &vec!(&nodes[1])[..], payment_preimage);
 
        mine_transaction(&nodes[1], &revoked_local_txn[0]);
        check_closed_broadcast!(nodes[1], true);
@@ -4840,7 +5071,7 @@ 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]);
 }
@@ -4861,41 +5092,43 @@ fn test_static_spendable_outputs_justice_tx_revoked_htlc_timeout_tx() {
        assert_eq!(revoked_local_txn[0].input.len(), 1);
        assert_eq!(revoked_local_txn[0].input[0].previous_output.txid, chan_1.3.txid());
 
-       claim_payment(&nodes[0], &vec!(&nodes[1])[..], payment_preimage, 3_000_000);
+       claim_payment(&nodes[0], &vec!(&nodes[1])[..], payment_preimage);
 
        // A will generate HTLC-Timeout from revoked commitment tx
        mine_transaction(&nodes[0], &revoked_local_txn[0]);
        check_closed_broadcast!(nodes[0], true);
        check_added_monitors!(nodes[0], 1);
+       connect_blocks(&nodes[0], TEST_FINAL_CLTV - 1); // Confirm blocks until the HTLC expires
 
        let revoked_htlc_txn = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap();
        assert_eq!(revoked_htlc_txn.len(), 2);
-       assert_eq!(revoked_htlc_txn[0].input.len(), 1);
-       assert_eq!(revoked_htlc_txn[0].input[0].witness.last().unwrap().len(), OFFERED_HTLC_SCRIPT_WEIGHT);
-       check_spends!(revoked_htlc_txn[0], revoked_local_txn[0]);
-       check_spends!(revoked_htlc_txn[1], chan_1.3);
+       check_spends!(revoked_htlc_txn[0], chan_1.3);
+       assert_eq!(revoked_htlc_txn[1].input.len(), 1);
+       assert_eq!(revoked_htlc_txn[1].input[0].witness.last().unwrap().len(), OFFERED_HTLC_SCRIPT_WEIGHT);
+       check_spends!(revoked_htlc_txn[1], revoked_local_txn[0]);
+       assert_ne!(revoked_htlc_txn[1].lock_time, 0); // HTLC-Timeout
 
        // B will generate justice tx from A's revoked commitment/HTLC tx
        let header = BlockHeader { version: 0x20000000, prev_blockhash: nodes[1].best_block_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
-       connect_block(&nodes[1], &Block { header, txdata: vec![revoked_local_txn[0].clone(), revoked_htlc_txn[0].clone()] });
+       connect_block(&nodes[1], &Block { header, txdata: vec![revoked_local_txn[0].clone(), revoked_htlc_txn[1].clone()] });
        check_closed_broadcast!(nodes[1], true);
        check_added_monitors!(nodes[1], 1);
 
        let node_txn = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap();
        assert_eq!(node_txn.len(), 3); // ChannelMonitor: bogus justice tx, justice tx on revoked outputs, ChannelManager: local commitment tx
        // The first transaction generated is bogus - it spends both outputs of revoked_local_txn[0]
-       // including the one already spent by revoked_htlc_txn[0]. That's OK, we'll spend with valid
+       // including the one already spent by revoked_htlc_txn[1]. That's OK, we'll spend with valid
        // transactions next...
        assert_eq!(node_txn[0].input.len(), 3);
-       check_spends!(node_txn[0], revoked_local_txn[0], revoked_htlc_txn[0]);
+       check_spends!(node_txn[0], revoked_local_txn[0], revoked_htlc_txn[1]);
 
        assert_eq!(node_txn[1].input.len(), 2);
-       check_spends!(node_txn[1], revoked_local_txn[0], revoked_htlc_txn[0]);
-       if node_txn[1].input[1].previous_output.txid == revoked_htlc_txn[0].txid() {
-               assert_ne!(node_txn[1].input[0].previous_output, revoked_htlc_txn[0].input[0].previous_output);
+       check_spends!(node_txn[1], revoked_local_txn[0], revoked_htlc_txn[1]);
+       if node_txn[1].input[1].previous_output.txid == revoked_htlc_txn[1].txid() {
+               assert_ne!(node_txn[1].input[0].previous_output, revoked_htlc_txn[1].input[0].previous_output);
        } else {
-               assert_eq!(node_txn[1].input[0].previous_output.txid, revoked_htlc_txn[0].txid());
-               assert_ne!(node_txn[1].input[1].previous_output, revoked_htlc_txn[0].input[0].previous_output);
+               assert_eq!(node_txn[1].input[0].previous_output.txid, revoked_htlc_txn[1].txid());
+               assert_ne!(node_txn[1].input[1].previous_output, revoked_htlc_txn[1].input[0].previous_output);
        }
 
        assert_eq!(node_txn[2].input.len(), 1);
@@ -4905,7 +5138,7 @@ 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]);
@@ -4930,7 +5163,7 @@ fn test_static_spendable_outputs_justice_tx_revoked_htlc_success_tx() {
        // The to-be-revoked commitment tx should have one HTLC and one to_remote output
        assert_eq!(revoked_local_txn[0].output.len(), 2);
 
-       claim_payment(&nodes[0], &vec!(&nodes[1])[..], payment_preimage, 3_000_000);
+       claim_payment(&nodes[0], &vec!(&nodes[1])[..], payment_preimage);
 
        // B will generate HTLC-Success from revoked commitment tx
        mine_transaction(&nodes[1], &revoked_local_txn[0]);
@@ -4980,7 +5213,7 @@ 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
@@ -5008,14 +5241,20 @@ fn test_onchain_to_onchain_claim() {
        let chan_1 = 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());
 
+       // Ensure all nodes are at the same height
+       let node_max_height = nodes.iter().map(|node| node.blocks.lock().unwrap().len()).max().unwrap() as u32;
+       connect_blocks(&nodes[0], node_max_height - nodes[0].best_block_info().1);
+       connect_blocks(&nodes[1], node_max_height - nodes[1].best_block_info().1);
+       connect_blocks(&nodes[2], node_max_height - nodes[2].best_block_info().1);
+
        // Rebalance the network a bit by relaying one payment through all the channels ...
-       send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2])[..], 8000000, 8_000_000);
-       send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2])[..], 8000000, 8_000_000);
+       send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2])[..], 8000000);
+       send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2])[..], 8000000);
 
        let (payment_preimage, _payment_hash, _payment_secret) = route_payment(&nodes[0], &vec!(&nodes[1], &nodes[2]), 3000000);
        let commitment_tx = get_local_commitment_txn!(nodes[2], chan_2.2);
        check_spends!(commitment_tx[0], chan_2.3);
-       nodes[2].node.claim_funds(payment_preimage, &None, 3_000_000);
+       nodes[2].node.claim_funds(payment_preimage);
        check_added_monitors!(nodes[2], 1);
        let updates = get_htlc_update_msgs!(nodes[2], nodes[1].node.get_our_node_id());
        assert!(updates.update_add_htlcs.is_empty());
@@ -5041,19 +5280,16 @@ fn test_onchain_to_onchain_claim() {
        // So we broadcast C's commitment tx and HTLC-Success on B's chain, we should successfully be able to extract preimage and update downstream monitor
        let header = BlockHeader { version: 0x20000000, prev_blockhash: nodes[1].best_block_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42};
        connect_block(&nodes[1], &Block { header, txdata: vec![c_txn[1].clone(), c_txn[2].clone()]});
+       connect_blocks(&nodes[1], TEST_FINAL_CLTV - 1); // Confirm blocks until the HTLC expires
        {
                let mut b_txn = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap();
-               // ChannelMonitor: claim tx, ChannelManager: local commitment tx + HTLC-timeout tx
-               assert_eq!(b_txn.len(), 3);
-               check_spends!(b_txn[1], chan_2.3); // B local commitment tx, issued by ChannelManager
-               check_spends!(b_txn[2], b_txn[1]); // HTLC-Timeout on B local commitment tx, issued by ChannelManager
-               assert_eq!(b_txn[2].input[0].witness.clone().last().unwrap().len(), OFFERED_HTLC_SCRIPT_WEIGHT);
-               assert!(b_txn[2].output[0].script_pubkey.is_v0_p2wsh()); // revokeable output
-               assert_ne!(b_txn[2].lock_time, 0); // Timeout tx
-               check_spends!(b_txn[0], c_txn[1]); // timeout tx on C remote commitment tx, issued by ChannelMonitor
-               assert_eq!(b_txn[0].input[0].witness.clone().last().unwrap().len(), ACCEPTED_HTLC_SCRIPT_WEIGHT);
-               assert!(b_txn[0].output[0].script_pubkey.is_v0_p2wpkh()); // direct payment
-               assert_ne!(b_txn[2].lock_time, 0); // Timeout tx
+               // ChannelMonitor: claim tx, ChannelManager: local commitment tx
+               assert_eq!(b_txn.len(), 2);
+               check_spends!(b_txn[0], chan_2.3); // B local commitment tx, issued by ChannelManager
+               check_spends!(b_txn[1], c_txn[1]); // timeout tx on C remote commitment tx, issued by ChannelMonitor
+               assert_eq!(b_txn[1].input[0].witness.clone().last().unwrap().len(), ACCEPTED_HTLC_SCRIPT_WEIGHT);
+               assert!(b_txn[1].output[0].script_pubkey.is_v0_p2wpkh()); // direct payment
+               assert_ne!(b_txn[1].lock_time, 0); // Timeout tx
                b_txn.clear();
        }
        check_added_monitors!(nodes[1], 1);
@@ -5082,14 +5318,19 @@ fn test_onchain_to_onchain_claim() {
        let commitment_tx = get_local_commitment_txn!(nodes[0], chan_1.2);
        mine_transaction(&nodes[1], &commitment_tx[0]);
        let b_txn = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap();
-       // ChannelMonitor: HTLC-Success tx, ChannelManager: local commitment tx + HTLC-Success tx
-       assert_eq!(b_txn.len(), 3);
-       check_spends!(b_txn[1], chan_1.3);
-       check_spends!(b_txn[2], b_txn[1]);
-       check_spends!(b_txn[0], commitment_tx[0]);
-       assert_eq!(b_txn[0].input[0].witness.clone().last().unwrap().len(), OFFERED_HTLC_SCRIPT_WEIGHT);
-       assert!(b_txn[0].output[0].script_pubkey.is_v0_p2wpkh()); // direct payment
-       assert_eq!(b_txn[0].lock_time, 0); // Success tx
+       // ChannelMonitor: HTLC-Success tx + HTLC-Timeout RBF Bump, ChannelManager: local commitment tx + HTLC-Success tx
+       assert_eq!(b_txn.len(), 4);
+       check_spends!(b_txn[2], chan_1.3);
+       check_spends!(b_txn[3], b_txn[2]);
+       let (htlc_success_claim, htlc_timeout_bumped) =
+               if b_txn[0].input[0].previous_output.txid == commitment_tx[0].txid()
+                       { (&b_txn[0], &b_txn[1]) } else { (&b_txn[1], &b_txn[0]) };
+       check_spends!(htlc_success_claim, commitment_tx[0]);
+       assert_eq!(htlc_success_claim.input[0].witness.clone().last().unwrap().len(), OFFERED_HTLC_SCRIPT_WEIGHT);
+       assert!(htlc_success_claim.output[0].script_pubkey.is_v0_p2wpkh()); // direct payment
+       assert_eq!(htlc_success_claim.lock_time, 0); // Success tx
+       check_spends!(htlc_timeout_bumped, c_txn[1]); // timeout tx on C remote commitment tx, issued by ChannelMonitor
+       assert_ne!(htlc_timeout_bumped.lock_time, 0); // Success tx
 
        check_closed_broadcast!(nodes[1], true);
        check_added_monitors!(nodes[1], 1);
@@ -5097,21 +5338,34 @@ fn test_onchain_to_onchain_claim() {
 
 #[test]
 fn test_duplicate_payment_hash_one_failure_one_success() {
-       // Topology : A --> B --> C
+       // Topology : A --> B --> C --> D
        // We route 2 payments with same hash between B and C, one will be timeout, the other successfully claim
-       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);
+       // Note that because C will refuse to generate two payment secrets for the same payment hash,
+       // 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]);
+       let mut nodes = create_network(4, &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());
+       create_announced_chan_between_nodes(&nodes, 2, 3, InitFeatures::known(), InitFeatures::known());
+
+       let node_max_height = nodes.iter().map(|node| node.blocks.lock().unwrap().len()).max().unwrap() as u32;
+       connect_blocks(&nodes[0], node_max_height - nodes[0].best_block_info().1);
+       connect_blocks(&nodes[1], node_max_height - nodes[1].best_block_info().1);
+       connect_blocks(&nodes[2], node_max_height - nodes[2].best_block_info().1);
+       connect_blocks(&nodes[3], node_max_height - nodes[3].best_block_info().1);
 
        let (our_payment_preimage, duplicate_payment_hash, _) = route_payment(&nodes[0], &vec!(&nodes[1], &nodes[2])[..], 900000);
 
+       let payment_secret = nodes[3].node.create_inbound_payment_for_hash(duplicate_payment_hash, None, 7200, 0).unwrap();
+       // We reduce the final CLTV here by a somewhat arbitrary constant to keep it under the one-byte
+       // script push size limit so that the below script length checks match
+       // ACCEPTED_HTLC_SCRIPT_WEIGHT.
        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, &Vec::new(), 900000, TEST_FINAL_CLTV, nodes[0].logger).unwrap();
-       send_along_route_with_hash(&nodes[0], route, &[&nodes[1], &nodes[2]], 900000, duplicate_payment_hash);
+               &nodes[3].node.get_our_node_id(), Some(InvoiceFeatures::known()), None, &Vec::new(), 900000, TEST_FINAL_CLTV - 40, nodes[0].logger).unwrap();
+       send_along_route_with_secret(&nodes[0], route, &[&[&nodes[1], &nodes[2], &nodes[3]]], 900000, duplicate_payment_hash, payment_secret);
 
        let commitment_txn = get_local_commitment_txn!(nodes[2], chan_2.2);
        assert_eq!(commitment_txn[0].input.len(), 1);
@@ -5120,28 +5374,32 @@ fn test_duplicate_payment_hash_one_failure_one_success() {
        mine_transaction(&nodes[1], &commitment_txn[0]);
        check_closed_broadcast!(nodes[1], true);
        check_added_monitors!(nodes[1], 1);
+       connect_blocks(&nodes[1], TEST_FINAL_CLTV - 40 + MIN_CLTV_EXPIRY_DELTA as u32 - 1); // Confirm blocks until the HTLC expires
 
        let htlc_timeout_tx;
        { // Extract one of the two HTLC-Timeout transaction
                let node_txn = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap();
-               // ChannelMonitor: timeout tx * 2, ChannelManager: local commitment tx + HTLC-timeout * 2
-               assert_eq!(node_txn.len(), 5);
-               check_spends!(node_txn[0], commitment_txn[0]);
-               assert_eq!(node_txn[0].input.len(), 1);
+               // ChannelMonitor: timeout tx * 3, ChannelManager: local commitment tx
+               assert_eq!(node_txn.len(), 4);
+               check_spends!(node_txn[0], chan_2.3);
+
                check_spends!(node_txn[1], commitment_txn[0]);
                assert_eq!(node_txn[1].input.len(), 1);
-               assert_ne!(node_txn[0].input[0], node_txn[1].input[0]);
-               assert_eq!(node_txn[0].input[0].witness.last().unwrap().len(), ACCEPTED_HTLC_SCRIPT_WEIGHT);
+               check_spends!(node_txn[2], commitment_txn[0]);
+               assert_eq!(node_txn[2].input.len(), 1);
+               assert_eq!(node_txn[1].input[0].previous_output, node_txn[2].input[0].previous_output);
+               check_spends!(node_txn[3], commitment_txn[0]);
+               assert_ne!(node_txn[1].input[0].previous_output, node_txn[3].input[0].previous_output);
+
                assert_eq!(node_txn[1].input[0].witness.last().unwrap().len(), ACCEPTED_HTLC_SCRIPT_WEIGHT);
-               check_spends!(node_txn[2], chan_2.3);
-               check_spends!(node_txn[3], node_txn[2]);
-               check_spends!(node_txn[4], node_txn[2]);
+               assert_eq!(node_txn[2].input[0].witness.last().unwrap().len(), ACCEPTED_HTLC_SCRIPT_WEIGHT);
+               assert_eq!(node_txn[3].input[0].witness.last().unwrap().len(), ACCEPTED_HTLC_SCRIPT_WEIGHT);
                htlc_timeout_tx = node_txn[1].clone();
        }
 
-       nodes[2].node.claim_funds(our_payment_preimage, &None, 900_000);
+       nodes[2].node.claim_funds(our_payment_preimage);
        mine_transaction(&nodes[2], &commitment_txn[0]);
-       check_added_monitors!(nodes[2], 3);
+       check_added_monitors!(nodes[2], 2);
        let events = nodes[2].node.get_and_clear_pending_msg_events();
        match events[0] {
                MessageSendEvent::UpdateHTLCs { .. } => {},
@@ -5153,18 +5411,17 @@ fn test_duplicate_payment_hash_one_failure_one_success() {
        }
        let htlc_success_txn: Vec<_> = nodes[2].tx_broadcaster.txn_broadcasted.lock().unwrap().clone();
        assert_eq!(htlc_success_txn.len(), 5); // ChannelMonitor: HTLC-Success txn (*2 due to 2-HTLC outputs), ChannelManager: local commitment tx + HTLC-Success txn (*2 due to 2-HTLC outputs)
-       check_spends!(htlc_success_txn[2], chan_2.3);
-       check_spends!(htlc_success_txn[3], htlc_success_txn[2]);
-       check_spends!(htlc_success_txn[4], htlc_success_txn[2]);
-       assert_eq!(htlc_success_txn[0], htlc_success_txn[3]);
+       check_spends!(htlc_success_txn[0], commitment_txn[0]);
+       check_spends!(htlc_success_txn[1], commitment_txn[0]);
        assert_eq!(htlc_success_txn[0].input.len(), 1);
        assert_eq!(htlc_success_txn[0].input[0].witness.last().unwrap().len(), ACCEPTED_HTLC_SCRIPT_WEIGHT);
-       assert_eq!(htlc_success_txn[1], htlc_success_txn[4]);
        assert_eq!(htlc_success_txn[1].input.len(), 1);
        assert_eq!(htlc_success_txn[1].input[0].witness.last().unwrap().len(), ACCEPTED_HTLC_SCRIPT_WEIGHT);
-       assert_ne!(htlc_success_txn[0].input[0], htlc_success_txn[1].input[0]);
-       check_spends!(htlc_success_txn[0], commitment_txn[0]);
-       check_spends!(htlc_success_txn[1], commitment_txn[0]);
+       assert_ne!(htlc_success_txn[0].input[0].previous_output, htlc_success_txn[1].input[0].previous_output);
+       assert_eq!(htlc_success_txn[2], commitment_txn[0]);
+       assert_eq!(htlc_success_txn[3], htlc_success_txn[0]);
+       assert_eq!(htlc_success_txn[4], htlc_success_txn[1]);
+       assert_ne!(htlc_success_txn[0].input[0].previous_output, htlc_timeout_tx.input[0].previous_output);
 
        mine_transaction(&nodes[1], &htlc_timeout_tx);
        connect_blocks(&nodes[1], ANTI_REORG_DELAY - 1);
@@ -5172,7 +5429,7 @@ fn test_duplicate_payment_hash_one_failure_one_success() {
        let htlc_updates = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
        assert!(htlc_updates.update_add_htlcs.is_empty());
        assert_eq!(htlc_updates.update_fail_htlcs.len(), 1);
-       assert_eq!(htlc_updates.update_fail_htlcs[0].htlc_id, 1);
+       let first_htlc_id = htlc_updates.update_fail_htlcs[0].htlc_id;
        assert!(htlc_updates.update_fulfill_htlcs.is_empty());
        assert!(htlc_updates.update_fail_malformed_htlcs.is_empty());
        check_added_monitors!(nodes[1], 1);
@@ -5181,13 +5438,7 @@ 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);
 
@@ -5197,7 +5448,7 @@ fn test_duplicate_payment_hash_one_failure_one_success() {
        assert!(updates.update_add_htlcs.is_empty());
        assert!(updates.update_fail_htlcs.is_empty());
        assert_eq!(updates.update_fulfill_htlcs.len(), 1);
-       assert_eq!(updates.update_fulfill_htlcs[0].htlc_id, 0);
+       assert_ne!(updates.update_fulfill_htlcs[0].htlc_id, first_htlc_id);
        assert!(updates.update_fail_malformed_htlcs.is_empty());
        check_added_monitors!(nodes[1], 1);
 
@@ -5230,7 +5481,7 @@ fn test_dynamic_spendable_outputs_local_htlc_success_tx() {
        check_spends!(local_txn[0], chan_1.3);
 
        // Give B knowledge of preimage to be able to generate a local HTLC-Success Tx
-       nodes[1].node.claim_funds(payment_preimage, &None, 9_000_000);
+       nodes[1].node.claim_funds(payment_preimage);
        check_added_monitors!(nodes[1], 1);
        mine_transaction(&nodes[1], &local_txn[0]);
        check_added_monitors!(nodes[1], 1);
@@ -5255,12 +5506,14 @@ fn test_dynamic_spendable_outputs_local_htlc_success_tx() {
        };
 
        mine_transaction(&nodes[1], &node_tx);
-       connect_blocks(&nodes[1], ANTI_REORG_DELAY - 1);
+       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);
+       assert_eq!(spend_txn[0].input[0].sequence, BREAKDOWN_TIMEOUT as u32);
 }
 
 fn do_test_fail_backwards_unrevoked_remote_announce(deliver_last_raa: bool, announce_latest: bool) {
@@ -5289,43 +5542,43 @@ fn do_test_fail_backwards_unrevoked_remote_announce(deliver_last_raa: bool, anno
        create_announced_chan_between_nodes(&nodes, 3, 5, InitFeatures::known(), InitFeatures::known());
 
        // Rebalance and check output sanity...
-       send_payment(&nodes[0], &[&nodes[2], &nodes[3], &nodes[4]], 500000, 500_000);
-       send_payment(&nodes[1], &[&nodes[2], &nodes[3], &nodes[5]], 500000, 500_000);
+       send_payment(&nodes[0], &[&nodes[2], &nodes[3], &nodes[4]], 500000);
+       send_payment(&nodes[1], &[&nodes[2], &nodes[3], &nodes[5]], 500000);
        assert_eq!(get_local_commitment_txn!(nodes[3], chan.2)[0].output.len(), 2);
 
        let ds_dust_limit = nodes[3].node.channel_state.lock().unwrap().by_id.get(&chan.2).unwrap().holder_dust_limit_satoshis;
        // 0th HTLC:
        let (_, payment_hash_1, _) = route_payment(&nodes[0], &[&nodes[2], &nodes[3], &nodes[4]], ds_dust_limit*1000); // not added < dust limit + HTLC tx fee
        // 1st HTLC:
-       let (_, payment_hash_2, payment_secret_2) = route_payment(&nodes[0], &[&nodes[2], &nodes[3], &nodes[4]], ds_dust_limit*1000); // not added < dust limit + HTLC tx fee
+       let (_, payment_hash_2, _) = route_payment(&nodes[0], &[&nodes[2], &nodes[3], &nodes[4]], ds_dust_limit*1000); // not added < dust limit + HTLC tx fee
        let net_graph_msg_handler = &nodes[1].net_graph_msg_handler;
        let our_node_id = &nodes[1].node.get_our_node_id();
        let route = get_route(our_node_id, &net_graph_msg_handler.network_graph.read().unwrap(), &nodes[5].node.get_our_node_id(), Some(InvoiceFeatures::known()), None, &Vec::new(), ds_dust_limit*1000, TEST_FINAL_CLTV, &logger).unwrap();
        // 2nd HTLC:
-       send_along_route_with_hash(&nodes[1], route.clone(), &[&nodes[2], &nodes[3], &nodes[5]], ds_dust_limit*1000, payment_hash_1); // not added < dust limit + HTLC tx fee
+       send_along_route_with_secret(&nodes[1], route.clone(), &[&[&nodes[2], &nodes[3], &nodes[5]]], ds_dust_limit*1000, payment_hash_1, nodes[5].node.create_inbound_payment_for_hash(payment_hash_1, None, 7200, 0).unwrap()); // not added < dust limit + HTLC tx fee
        // 3rd HTLC:
-       send_along_route_with_hash(&nodes[1], route, &[&nodes[2], &nodes[3], &nodes[5]], ds_dust_limit*1000, payment_hash_2); // not added < dust limit + HTLC tx fee
+       send_along_route_with_secret(&nodes[1], route, &[&[&nodes[2], &nodes[3], &nodes[5]]], ds_dust_limit*1000, payment_hash_2, nodes[5].node.create_inbound_payment_for_hash(payment_hash_2, None, 7200, 0).unwrap()); // not added < dust limit + HTLC tx fee
        // 4th HTLC:
        let (_, payment_hash_3, _) = route_payment(&nodes[0], &[&nodes[2], &nodes[3], &nodes[4]], 1000000);
        // 5th HTLC:
-       let (_, payment_hash_4, payment_secret_4) = route_payment(&nodes[0], &[&nodes[2], &nodes[3], &nodes[4]], 1000000);
+       let (_, payment_hash_4, _) = route_payment(&nodes[0], &[&nodes[2], &nodes[3], &nodes[4]], 1000000);
        let route = get_route(our_node_id, &net_graph_msg_handler.network_graph.read().unwrap(), &nodes[5].node.get_our_node_id(), Some(InvoiceFeatures::known()), None, &Vec::new(), 1000000, TEST_FINAL_CLTV, &logger).unwrap();
        // 6th HTLC:
-       send_along_route_with_hash(&nodes[1], route.clone(), &[&nodes[2], &nodes[3], &nodes[5]], 1000000, payment_hash_3);
+       send_along_route_with_secret(&nodes[1], route.clone(), &[&[&nodes[2], &nodes[3], &nodes[5]]], 1000000, payment_hash_3, nodes[5].node.create_inbound_payment_for_hash(payment_hash_3, None, 7200, 0).unwrap());
        // 7th HTLC:
-       send_along_route_with_hash(&nodes[1], route, &[&nodes[2], &nodes[3], &nodes[5]], 1000000, payment_hash_4);
+       send_along_route_with_secret(&nodes[1], route, &[&[&nodes[2], &nodes[3], &nodes[5]]], 1000000, payment_hash_4, nodes[5].node.create_inbound_payment_for_hash(payment_hash_4, None, 7200, 0).unwrap());
 
        // 8th HTLC:
        let (_, payment_hash_5, _) = route_payment(&nodes[0], &[&nodes[2], &nodes[3], &nodes[4]], 1000000);
        // 9th HTLC:
        let route = get_route(our_node_id, &net_graph_msg_handler.network_graph.read().unwrap(), &nodes[5].node.get_our_node_id(), Some(InvoiceFeatures::known()), None, &Vec::new(), ds_dust_limit*1000, TEST_FINAL_CLTV, &logger).unwrap();
-       send_along_route_with_hash(&nodes[1], route, &[&nodes[2], &nodes[3], &nodes[5]], ds_dust_limit*1000, payment_hash_5); // not added < dust limit + HTLC tx fee
+       send_along_route_with_secret(&nodes[1], route, &[&[&nodes[2], &nodes[3], &nodes[5]]], ds_dust_limit*1000, payment_hash_5, nodes[5].node.create_inbound_payment_for_hash(payment_hash_5, None, 7200, 0).unwrap()); // not added < dust limit + HTLC tx fee
 
        // 10th HTLC:
        let (_, payment_hash_6, _) = route_payment(&nodes[0], &[&nodes[2], &nodes[3], &nodes[4]], ds_dust_limit*1000); // not added < dust limit + HTLC tx fee
        // 11th HTLC:
        let route = get_route(our_node_id, &net_graph_msg_handler.network_graph.read().unwrap(), &nodes[5].node.get_our_node_id(), Some(InvoiceFeatures::known()), None, &Vec::new(), 1000000, TEST_FINAL_CLTV, &logger).unwrap();
-       send_along_route_with_hash(&nodes[1], route, &[&nodes[2], &nodes[3], &nodes[5]], 1000000, payment_hash_6);
+       send_along_route_with_secret(&nodes[1], route, &[&[&nodes[2], &nodes[3], &nodes[5]]], 1000000, payment_hash_6, nodes[5].node.create_inbound_payment_for_hash(payment_hash_6, None, 7200, 0).unwrap());
 
        // Double-check that six of the new HTLC were added
        // We now have six HTLCs pending over the dust limit and six HTLCs under the dust limit (ie,
@@ -5335,10 +5588,10 @@ fn do_test_fail_backwards_unrevoked_remote_announce(deliver_last_raa: bool, anno
 
        // Now fail back three of the over-dust-limit and three of the under-dust-limit payments in one go.
        // Fail 0th below-dust, 4th above-dust, 8th above-dust, 10th below-dust HTLCs
-       assert!(nodes[4].node.fail_htlc_backwards(&payment_hash_1, &None));
-       assert!(nodes[4].node.fail_htlc_backwards(&payment_hash_3, &None));
-       assert!(nodes[4].node.fail_htlc_backwards(&payment_hash_5, &None));
-       assert!(nodes[4].node.fail_htlc_backwards(&payment_hash_6, &None));
+       assert!(nodes[4].node.fail_htlc_backwards(&payment_hash_1));
+       assert!(nodes[4].node.fail_htlc_backwards(&payment_hash_3));
+       assert!(nodes[4].node.fail_htlc_backwards(&payment_hash_5));
+       assert!(nodes[4].node.fail_htlc_backwards(&payment_hash_6));
        check_added_monitors!(nodes[4], 0);
        expect_pending_htlcs_forwardable!(nodes[4]);
        check_added_monitors!(nodes[4], 1);
@@ -5351,8 +5604,8 @@ fn do_test_fail_backwards_unrevoked_remote_announce(deliver_last_raa: bool, anno
        commitment_signed_dance!(nodes[3], nodes[4], four_removes.commitment_signed, false);
 
        // Fail 3rd below-dust and 7th above-dust HTLCs
-       assert!(nodes[5].node.fail_htlc_backwards(&payment_hash_2, &None));
-       assert!(nodes[5].node.fail_htlc_backwards(&payment_hash_4, &None));
+       assert!(nodes[5].node.fail_htlc_backwards(&payment_hash_2));
+       assert!(nodes[5].node.fail_htlc_backwards(&payment_hash_4));
        check_added_monitors!(nodes[5], 0);
        expect_pending_htlcs_forwardable!(nodes[5]);
        check_added_monitors!(nodes[5], 1);
@@ -5537,25 +5790,33 @@ fn test_dynamic_spendable_outputs_local_htlc_timeout_tx() {
        mine_transaction(&nodes[0], &local_txn[0]);
        check_closed_broadcast!(nodes[0], true);
        check_added_monitors!(nodes[0], 1);
+       connect_blocks(&nodes[0], TEST_FINAL_CLTV - 1); // Confirm blocks until the HTLC expires
 
        let htlc_timeout = {
                let node_txn = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap();
-               assert_eq!(node_txn[0].input.len(), 1);
-               assert_eq!(node_txn[0].input[0].witness.last().unwrap().len(), OFFERED_HTLC_SCRIPT_WEIGHT);
-               check_spends!(node_txn[0], local_txn[0]);
-               node_txn[0].clone()
+               assert_eq!(node_txn.len(), 2);
+               check_spends!(node_txn[0], chan_1.3);
+               assert_eq!(node_txn[1].input.len(), 1);
+               assert_eq!(node_txn[1].input[0].witness.last().unwrap().len(), OFFERED_HTLC_SCRIPT_WEIGHT);
+               check_spends!(node_txn[1], local_txn[0]);
+               node_txn[1].clone()
        };
 
        mine_transaction(&nodes[0], &htlc_timeout);
-       connect_blocks(&nodes[0], ANTI_REORG_DELAY - 1);
+       connect_blocks(&nodes[0], BREAKDOWN_TIMEOUT as u32 - 1);
        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);
        check_spends!(spend_txn[1], htlc_timeout);
+       assert_eq!(spend_txn[1].input[0].sequence, BREAKDOWN_TIMEOUT as u32);
+       assert_eq!(spend_txn[2].input.len(), 2);
        check_spends!(spend_txn[2], local_txn[0], htlc_timeout);
+       assert!(spend_txn[2].input[0].sequence == BREAKDOWN_TIMEOUT as u32 ||
+               spend_txn[2].input[1].sequence == BREAKDOWN_TIMEOUT as u32);
 }
 
 #[test]
@@ -5585,6 +5846,12 @@ fn test_key_derivation_params() {
        let chan_1 = create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known());
        assert_ne!(chan_0.3.output[0].script_pubkey, chan_1.3.output[0].script_pubkey);
 
+       // Ensure all nodes are at the same height
+       let node_max_height = nodes.iter().map(|node| node.blocks.lock().unwrap().len()).max().unwrap() as u32;
+       connect_blocks(&nodes[0], node_max_height - nodes[0].best_block_info().1);
+       connect_blocks(&nodes[1], node_max_height - nodes[1].best_block_info().1);
+       connect_blocks(&nodes[2], node_max_height - nodes[2].best_block_info().1);
+
        let (_, our_payment_hash, _) = route_payment(&nodes[0], &vec!(&nodes[1])[..], 9000000);
        let local_txn_0 = get_local_commitment_txn!(nodes[0], chan_0.2);
        let local_txn_1 = get_local_commitment_txn!(nodes[0], chan_1.2);
@@ -5603,28 +5870,34 @@ fn test_key_derivation_params() {
 
        // Timeout HTLC on A's chain and so it can generate a HTLC-Timeout tx
        mine_transaction(&nodes[0], &local_txn_1[0]);
+       connect_blocks(&nodes[0], TEST_FINAL_CLTV - 1); // Confirm blocks until the HTLC expires
        check_closed_broadcast!(nodes[0], true);
        check_added_monitors!(nodes[0], 1);
 
        let htlc_timeout = {
                let node_txn = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap();
-               assert_eq!(node_txn[0].input.len(), 1);
-               assert_eq!(node_txn[0].input[0].witness.last().unwrap().len(), OFFERED_HTLC_SCRIPT_WEIGHT);
-               check_spends!(node_txn[0], local_txn_1[0]);
-               node_txn[0].clone()
+               assert_eq!(node_txn[1].input.len(), 1);
+               assert_eq!(node_txn[1].input[0].witness.last().unwrap().len(), OFFERED_HTLC_SCRIPT_WEIGHT);
+               check_spends!(node_txn[1], local_txn_1[0]);
+               node_txn[1].clone()
        };
 
        mine_transaction(&nodes[0], &htlc_timeout);
-       connect_blocks(&nodes[0], ANTI_REORG_DELAY - 1);
+       connect_blocks(&nodes[0], BREAKDOWN_TIMEOUT as u32 - 1);
        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 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);
        check_spends!(spend_txn[1], htlc_timeout);
+       assert_eq!(spend_txn[1].input[0].sequence, BREAKDOWN_TIMEOUT as u32);
+       assert_eq!(spend_txn[2].input.len(), 2);
        check_spends!(spend_txn[2], local_txn_1[0], htlc_timeout);
+       assert!(spend_txn[2].input[0].sequence == BREAKDOWN_TIMEOUT as u32 ||
+               spend_txn[2].input[1].sequence == BREAKDOWN_TIMEOUT as u32);
 }
 
 #[test]
@@ -5636,20 +5909,20 @@ fn test_static_output_closing_tx() {
 
        let chan = create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known());
 
-       send_payment(&nodes[0], &vec!(&nodes[1])[..], 8000000, 8_000_000);
+       send_payment(&nodes[0], &vec!(&nodes[1])[..], 8000000);
        let closing_tx = close_channel(&nodes[0], &nodes[1], &chan.2, chan.3, true).2;
 
        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);
 }
@@ -5665,7 +5938,7 @@ fn do_htlc_claim_local_commitment_only(use_dust: bool) {
 
        // Claim the payment, but don't deliver A's commitment_signed, resulting in the HTLC only being
        // present in B's local commitment transaction, but none of A's commitment transactions.
-       assert!(nodes[1].node.claim_funds(our_payment_preimage, &None, if use_dust { 50_000 } else { 3_000_000 }));
+       assert!(nodes[1].node.claim_funds(our_payment_preimage));
        check_added_monitors!(nodes[1], 1);
 
        let bs_updates = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
@@ -5710,7 +5983,7 @@ fn do_htlc_claim_current_remote_commitment_only(use_dust: bool) {
        let (_, payment_hash, payment_secret) = get_payment_preimage_hash!(nodes[1]);
        let net_graph_msg_handler = &nodes[0].net_graph_msg_handler;
        let route = get_route(&nodes[0].node.get_our_node_id(), &net_graph_msg_handler.network_graph.read().unwrap(), &nodes[1].node.get_our_node_id(), Some(InvoiceFeatures::known()), None, &Vec::new(), if use_dust { 50000 } else { 3000000 }, TEST_FINAL_CLTV, &logger).unwrap();
-       nodes[0].node.send_payment(&route, payment_hash, &None).unwrap();
+       nodes[0].node.send_payment(&route, payment_hash, &Some(payment_secret)).unwrap();
        check_added_monitors!(nodes[0], 1);
 
        let _as_update = get_htlc_update_msgs!(nodes[0], nodes[1].node.get_our_node_id());
@@ -5744,7 +6017,7 @@ fn do_htlc_claim_previous_remote_commitment_only(use_dust: bool, check_revoke_no
        // actually revoked.
        let htlc_value = if use_dust { 50000 } else { 3000000 };
        let (_, our_payment_hash, _) = route_payment(&nodes[0], &[&nodes[1]], htlc_value);
-       assert!(nodes[1].node.fail_htlc_backwards(&our_payment_hash, &None));
+       assert!(nodes[1].node.fail_htlc_backwards(&our_payment_hash));
        expect_pending_htlcs_forwardable!(nodes[1]);
        check_added_monitors!(nodes[1], 1);
 
@@ -5878,6 +6151,31 @@ fn bolt2_open_channel_sending_node_checks_part2() {
        assert!(PublicKey::from_slice(&node0_to_1_send_open_channel.delayed_payment_basepoint.serialize()).is_ok());
 }
 
+#[test]
+fn bolt2_open_channel_sane_dust_limit() {
+       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 channel_value_satoshis=1000000;
+       let push_msat=10001;
+       nodes[0].node.create_channel(nodes[1].node.get_our_node_id(), channel_value_satoshis, push_msat, 42, None).unwrap();
+       let mut node0_to_1_send_open_channel = get_event_msg!(nodes[0], MessageSendEvent::SendOpenChannel, nodes[1].node.get_our_node_id());
+       node0_to_1_send_open_channel.dust_limit_satoshis = 661;
+       node0_to_1_send_open_channel.channel_reserve_satoshis = 100001;
+
+       nodes[1].node.handle_open_channel(&nodes[0].node.get_our_node_id(), InitFeatures::known(), &node0_to_1_send_open_channel);
+       let events = nodes[1].node.get_and_clear_pending_msg_events();
+       let err_msg = match events[0] {
+               MessageSendEvent::HandleError { action: ErrorAction::SendErrorMessage { ref msg }, node_id: _ } => {
+                       msg.clone()
+               },
+               _ => panic!("Unexpected event"),
+       };
+       assert_eq!(err_msg.data, "dust_limit_satoshis (661) is greater than the implementation limit (660)");
+}
+
 // Test that if we fail to send an HTLC that is being freed from the holding cell, and the HTLC
 // originated from our node, its failure is surfaced to the user. We trigger this failure to
 // free the HTLC by increasing our fee while the HTLC is in the holding cell such that the HTLC
@@ -5918,7 +6216,7 @@ fn test_fail_holding_cell_htlc_upon_free() {
        let route = get_route(&nodes[0].node.get_our_node_id(), &net_graph_msg_handler.network_graph.read().unwrap(), &nodes[1].node.get_our_node_id(), Some(InvoiceFeatures::known()), None, &[], max_can_send, TEST_FINAL_CLTV, &logger).unwrap();
 
        // Send a payment which passes reserve checks but gets stuck in the holding cell.
-       nodes[0].node.send_payment(&route, our_payment_hash, &None).unwrap();
+       nodes[0].node.send_payment(&route, our_payment_hash, &Some(our_payment_secret)).unwrap();
        chan_stat = get_channel_value_stat!(nodes[0], chan.2);
        assert_eq!(chan_stat.holding_cell_outbound_amount_msat, max_can_send);
 
@@ -5934,8 +6232,9 @@ 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.
@@ -5994,10 +6293,10 @@ fn test_free_and_fail_holding_cell_htlcs() {
        let route_2 = get_route(&nodes[0].node.get_our_node_id(), &net_graph_msg_handler.network_graph.read().unwrap(), &nodes[1].node.get_our_node_id(), Some(InvoiceFeatures::known()), None, &[], amt_2, TEST_FINAL_CLTV, &logger).unwrap();
 
        // Send 2 payments which pass reserve checks but get stuck in the holding cell.
-       nodes[0].node.send_payment(&route_1, payment_hash_1, &None).unwrap();
+       nodes[0].node.send_payment(&route_1, payment_hash_1, &Some(payment_secret_1)).unwrap();
        chan_stat = get_channel_value_stat!(nodes[0], chan.2);
        assert_eq!(chan_stat.holding_cell_outbound_amount_msat, amt_1);
-       nodes[0].node.send_payment(&route_2, payment_hash_2, &None).unwrap();
+       nodes[0].node.send_payment(&route_2, payment_hash_2, &Some(payment_secret_2)).unwrap();
        chan_stat = get_channel_value_stat!(nodes[0], chan.2);
        assert_eq!(chan_stat.holding_cell_outbound_amount_msat, amt_1 + amt_2);
 
@@ -6014,8 +6313,9 @@ 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.
@@ -6058,7 +6358,7 @@ fn test_free_and_fail_holding_cell_htlcs() {
                Event::PaymentReceived { .. } => {},
                _ => panic!("Unexpected event"),
        }
-       nodes[1].node.claim_funds(payment_preimage_1, &None, amt_1);
+       nodes[1].node.claim_funds(payment_preimage_1);
        check_added_monitors!(nodes[1], 1);
        let update_msgs = 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(), &update_msgs.update_fulfill_htlcs[0]);
@@ -6115,7 +6415,7 @@ fn test_fail_holding_cell_htlc_upon_free_multihop() {
        let payment_event = {
                let net_graph_msg_handler = &nodes[0].net_graph_msg_handler;
                let route = get_route(&nodes[0].node.get_our_node_id(), &net_graph_msg_handler.network_graph.read().unwrap(), &nodes[2].node.get_our_node_id(), Some(InvoiceFeatures::known()), None, &[], max_can_send, TEST_FINAL_CLTV, &logger).unwrap();
-               nodes[0].node.send_payment(&route, our_payment_hash, &None).unwrap();
+               nodes[0].node.send_payment(&route, our_payment_hash, &Some(our_payment_secret)).unwrap();
                check_added_monitors!(nodes[0], 1);
 
                let mut events = nodes[0].node.get_and_clear_pending_msg_events();
@@ -6197,20 +6497,8 @@ 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);
 }
 
@@ -6233,7 +6521,7 @@ fn test_update_add_htlc_bolt2_sender_value_below_minimum_msat() {
        let mut route = get_route(&nodes[0].node.get_our_node_id(), &net_graph_msg_handler.network_graph.read().unwrap(), &nodes[1].node.get_our_node_id(), Some(InvoiceFeatures::known()), None, &[], 100000, TEST_FINAL_CLTV, &logger).unwrap();
        route.paths[0][0].fee_msat = 100;
 
-       unwrap_send_err!(nodes[0].node.send_payment(&route, our_payment_hash, &None), true, APIError::ChannelUnavailable { ref err },
+       unwrap_send_err!(nodes[0].node.send_payment(&route, our_payment_hash, &Some(our_payment_secret)), true, APIError::ChannelUnavailable { ref err },
                assert!(regex::Regex::new(r"Cannot send less than their minimum HTLC value \(\d+\)").unwrap().is_match(err)));
        assert!(nodes[0].node.get_and_clear_pending_msg_events().is_empty());
        nodes[0].logger.assert_log_contains("lightning::ln::channelmanager".to_string(), "Cannot send less than their minimum HTLC value".to_string(), 1);
@@ -6253,7 +6541,7 @@ fn test_update_add_htlc_bolt2_sender_zero_value_msat() {
        let logger = test_utils::TestLogger::new();
        let mut route = get_route(&nodes[0].node.get_our_node_id(), &net_graph_msg_handler.network_graph.read().unwrap(), &nodes[1].node.get_our_node_id(), Some(InvoiceFeatures::known()), None, &[], 100000, TEST_FINAL_CLTV, &logger).unwrap();
        route.paths[0][0].fee_msat = 0;
-       unwrap_send_err!(nodes[0].node.send_payment(&route, our_payment_hash, &None), true, APIError::ChannelUnavailable { ref err },
+       unwrap_send_err!(nodes[0].node.send_payment(&route, our_payment_hash, &Some(our_payment_secret)), true, APIError::ChannelUnavailable { ref err },
                assert_eq!(err, "Cannot send 0-msat HTLC"));
 
        assert!(nodes[0].node.get_and_clear_pending_msg_events().is_empty());
@@ -6273,7 +6561,7 @@ fn test_update_add_htlc_bolt2_receiver_zero_value_msat() {
        let net_graph_msg_handler = &nodes[0].net_graph_msg_handler;
        let logger = test_utils::TestLogger::new();
        let route = get_route(&nodes[0].node.get_our_node_id(), &net_graph_msg_handler.network_graph.read().unwrap(), &nodes[1].node.get_our_node_id(), Some(InvoiceFeatures::known()), None, &[], 100000, TEST_FINAL_CLTV, &logger).unwrap();
-       nodes[0].node.send_payment(&route, our_payment_hash, &None).unwrap();
+       nodes[0].node.send_payment(&route, our_payment_hash, &Some(our_payment_secret)).unwrap();
        check_added_monitors!(nodes[0], 1);
        let mut updates = get_htlc_update_msgs!(nodes[0], nodes[1].node.get_our_node_id());
        updates.update_add_htlcs[0].amount_msat = 0;
@@ -6299,7 +6587,7 @@ fn test_update_add_htlc_bolt2_sender_cltv_expiry_too_high() {
 
        let net_graph_msg_handler = &nodes[0].net_graph_msg_handler;
        let route = get_route(&nodes[0].node.get_our_node_id(), &net_graph_msg_handler.network_graph.read().unwrap(), &nodes[1].node.get_our_node_id(), Some(InvoiceFeatures::known()), None, &[], 100000000, 500000001, &logger).unwrap();
-       unwrap_send_err!(nodes[0].node.send_payment(&route, our_payment_hash, &None), true, APIError::RouteError { ref err },
+       unwrap_send_err!(nodes[0].node.send_payment(&route, our_payment_hash, &Some(our_payment_secret)), true, APIError::RouteError { ref err },
                assert_eq!(err, &"Channel CLTV overflowed?"));
 }
 
@@ -6321,7 +6609,7 @@ fn test_update_add_htlc_bolt2_sender_exceed_max_htlc_num_and_htlc_id_increment()
                let payment_event = {
                        let net_graph_msg_handler = &nodes[0].net_graph_msg_handler;
                        let route = get_route(&nodes[0].node.get_our_node_id(), &net_graph_msg_handler.network_graph.read().unwrap(), &nodes[1].node.get_our_node_id(), Some(InvoiceFeatures::known()), None, &[], 100000, TEST_FINAL_CLTV, &logger).unwrap();
-                       nodes[0].node.send_payment(&route, our_payment_hash, &None).unwrap();
+                       nodes[0].node.send_payment(&route, our_payment_hash, &Some(our_payment_secret)).unwrap();
                        check_added_monitors!(nodes[0], 1);
 
                        let mut events = nodes[0].node.get_and_clear_pending_msg_events();
@@ -6338,12 +6626,12 @@ fn test_update_add_htlc_bolt2_sender_exceed_max_htlc_num_and_htlc_id_increment()
                commitment_signed_dance!(nodes[1], nodes[0], payment_event.commitment_msg, false);
 
                expect_pending_htlcs_forwardable!(nodes[1]);
-               expect_payment_received!(nodes[1], our_payment_hash, 100000);
+               expect_payment_received!(nodes[1], our_payment_hash, our_payment_secret, 100000);
        }
        let (_, our_payment_hash, our_payment_secret) = get_payment_preimage_hash!(nodes[1]);
        let net_graph_msg_handler = &nodes[0].net_graph_msg_handler;
        let route = get_route(&nodes[0].node.get_our_node_id(), &net_graph_msg_handler.network_graph.read().unwrap(), &nodes[1].node.get_our_node_id(), Some(InvoiceFeatures::known()), None, &[], 100000, TEST_FINAL_CLTV, &logger).unwrap();
-       unwrap_send_err!(nodes[0].node.send_payment(&route, our_payment_hash, &None), true, APIError::ChannelUnavailable { ref err },
+       unwrap_send_err!(nodes[0].node.send_payment(&route, our_payment_hash, &Some(our_payment_secret)), true, APIError::ChannelUnavailable { ref err },
                assert!(regex::Regex::new(r"Cannot push more than their max accepted HTLCs \(\d+\)").unwrap().is_match(err)));
 
        assert!(nodes[0].node.get_and_clear_pending_msg_events().is_empty());
@@ -6361,7 +6649,7 @@ fn test_update_add_htlc_bolt2_sender_exceed_max_htlc_value_in_flight() {
        let chan = create_announced_chan_between_nodes_with_value(&nodes, 0, 1, channel_value, 0, InitFeatures::known(), InitFeatures::known());
        let max_in_flight = get_channel_value_stat!(nodes[0], chan.2).counterparty_max_htlc_value_in_flight_msat;
 
-       send_payment(&nodes[0], &vec!(&nodes[1])[..], max_in_flight, max_in_flight);
+       send_payment(&nodes[0], &vec!(&nodes[1])[..], max_in_flight);
 
        let (_, our_payment_hash, our_payment_secret) = get_payment_preimage_hash!(nodes[1]);
        // Manually create a route over our max in flight (which our router normally automatically
@@ -6371,13 +6659,13 @@ fn test_update_add_htlc_bolt2_sender_exceed_max_htlc_value_in_flight() {
           short_channel_id: nodes[1].node.list_usable_channels()[0].short_channel_id.unwrap(),
           fee_msat: max_in_flight + 1, cltv_expiry_delta: TEST_FINAL_CLTV
        }]] };
-       unwrap_send_err!(nodes[0].node.send_payment(&route, our_payment_hash, &None), true, APIError::ChannelUnavailable { ref err },
+       unwrap_send_err!(nodes[0].node.send_payment(&route, our_payment_hash, &Some(our_payment_secret)), true, APIError::ChannelUnavailable { ref err },
                assert!(regex::Regex::new(r"Cannot send value that would put us over the max HTLC value in flight our peer will accept \(\d+\)").unwrap().is_match(err)));
 
        assert!(nodes[0].node.get_and_clear_pending_msg_events().is_empty());
        nodes[0].logger.assert_log_contains("lightning::ln::channelmanager".to_string(), "Cannot send value that would put us over the max HTLC value in flight our peer will accept".to_string(), 1);
 
-       send_payment(&nodes[0], &[&nodes[1]], max_in_flight, max_in_flight);
+       send_payment(&nodes[0], &[&nodes[1]], max_in_flight);
 }
 
 // BOLT 2 Requirements for the Receiver when handling an update_add_htlc message.
@@ -6400,7 +6688,7 @@ fn test_update_add_htlc_bolt2_receiver_check_amount_received_more_than_min() {
        let net_graph_msg_handler = &nodes[0].net_graph_msg_handler;
        let logger = test_utils::TestLogger::new();
        let route = get_route(&nodes[0].node.get_our_node_id(), &net_graph_msg_handler.network_graph.read().unwrap(), &nodes[1].node.get_our_node_id(), Some(InvoiceFeatures::known()), None, &[], htlc_minimum_msat, TEST_FINAL_CLTV, &logger).unwrap();
-       nodes[0].node.send_payment(&route, our_payment_hash, &None).unwrap();
+       nodes[0].node.send_payment(&route, our_payment_hash, &Some(our_payment_secret)).unwrap();
        check_added_monitors!(nodes[0], 1);
        let mut updates = get_htlc_update_msgs!(nodes[0], nodes[1].node.get_our_node_id());
        updates.update_add_htlcs[0].amount_msat = htlc_minimum_msat-1;
@@ -6431,7 +6719,7 @@ fn test_update_add_htlc_bolt2_receiver_sender_can_afford_amount_sent() {
        let (_, our_payment_hash, our_payment_secret) = get_payment_preimage_hash!(nodes[1]);
        let net_graph_msg_handler = &nodes[0].net_graph_msg_handler;
        let route = get_route(&nodes[0].node.get_our_node_id(), &net_graph_msg_handler.network_graph.read().unwrap(), &nodes[1].node.get_our_node_id(), Some(InvoiceFeatures::known()), None, &[], max_can_send, TEST_FINAL_CLTV, &logger).unwrap();
-       nodes[0].node.send_payment(&route, our_payment_hash, &None).unwrap();
+       nodes[0].node.send_payment(&route, our_payment_hash, &Some(our_payment_secret)).unwrap();
        check_added_monitors!(nodes[0], 1);
        let mut updates = get_htlc_update_msgs!(nodes[0], nodes[1].node.get_our_node_id());
 
@@ -6466,7 +6754,7 @@ 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, &None, 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).unwrap();
        let onion_packet = onion_utils::construct_onion_packet(onion_payloads, onion_keys, [0; 32], &our_payment_hash);
 
        let mut msg = msgs::UpdateAddHTLC {
@@ -6504,7 +6792,7 @@ fn test_update_add_htlc_bolt2_receiver_check_max_in_flight_msat() {
        let (_, our_payment_hash, our_payment_secret) = get_payment_preimage_hash!(nodes[1]);
        let net_graph_msg_handler = &nodes[0].net_graph_msg_handler;
        let route = get_route(&nodes[0].node.get_our_node_id(), &net_graph_msg_handler.network_graph.read().unwrap(), &nodes[1].node.get_our_node_id(), Some(InvoiceFeatures::known()), None, &[], 1000000, TEST_FINAL_CLTV, &logger).unwrap();
-       nodes[0].node.send_payment(&route, our_payment_hash, &None).unwrap();
+       nodes[0].node.send_payment(&route, our_payment_hash, &Some(our_payment_secret)).unwrap();
        check_added_monitors!(nodes[0], 1);
        let mut updates = get_htlc_update_msgs!(nodes[0], nodes[1].node.get_our_node_id());
        updates.update_add_htlcs[0].amount_msat = get_channel_value_stat!(nodes[1], chan.2).counterparty_max_htlc_value_in_flight_msat + 1;
@@ -6529,7 +6817,7 @@ fn test_update_add_htlc_bolt2_receiver_check_cltv_expiry() {
        let (_, our_payment_hash, our_payment_secret) = get_payment_preimage_hash!(nodes[1]);
        let net_graph_msg_handler = &nodes[0].net_graph_msg_handler;
        let route = get_route(&nodes[0].node.get_our_node_id(), &net_graph_msg_handler.network_graph.read().unwrap(), &nodes[1].node.get_our_node_id(), Some(InvoiceFeatures::known()), None, &[], 1000000, TEST_FINAL_CLTV, &logger).unwrap();
-       nodes[0].node.send_payment(&route, our_payment_hash, &None).unwrap();
+       nodes[0].node.send_payment(&route, our_payment_hash, &Some(our_payment_secret)).unwrap();
        check_added_monitors!(nodes[0], 1);
        let mut updates = get_htlc_update_msgs!(nodes[0], nodes[1].node.get_our_node_id());
        updates.update_add_htlcs[0].cltv_expiry = 500000000;
@@ -6556,7 +6844,7 @@ fn test_update_add_htlc_bolt2_receiver_check_repeated_id_ignore() {
        let (_, our_payment_hash, our_payment_secret) = get_payment_preimage_hash!(nodes[1]);
        let net_graph_msg_handler = &nodes[0].net_graph_msg_handler;
        let route = get_route(&nodes[0].node.get_our_node_id(), &net_graph_msg_handler.network_graph.read().unwrap(), &nodes[1].node.get_our_node_id(), Some(InvoiceFeatures::known()), None, &[], 1000000, TEST_FINAL_CLTV, &logger).unwrap();
-       nodes[0].node.send_payment(&route, our_payment_hash, &None).unwrap();
+       nodes[0].node.send_payment(&route, our_payment_hash, &Some(our_payment_secret)).unwrap();
        check_added_monitors!(nodes[0], 1);
        let updates = get_htlc_update_msgs!(nodes[0], nodes[1].node.get_our_node_id());
        nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &updates.update_add_htlcs[0]);
@@ -6603,7 +6891,7 @@ fn test_update_fulfill_htlc_bolt2_update_fulfill_htlc_before_commitment() {
        let (our_payment_preimage, our_payment_hash, our_payment_secret) = get_payment_preimage_hash!(nodes[1]);
        let net_graph_msg_handler = &nodes[0].net_graph_msg_handler;
        let route = get_route(&nodes[0].node.get_our_node_id(), &net_graph_msg_handler.network_graph.read().unwrap(), &nodes[1].node.get_our_node_id(), Some(InvoiceFeatures::known()), None, &[], 1000000, TEST_FINAL_CLTV, &logger).unwrap();
-       nodes[0].node.send_payment(&route, our_payment_hash, &None).unwrap();
+       nodes[0].node.send_payment(&route, our_payment_hash, &Some(our_payment_secret)).unwrap();
 
        check_added_monitors!(nodes[0], 1);
        let updates = get_htlc_update_msgs!(nodes[0], nodes[1].node.get_our_node_id());
@@ -6637,7 +6925,7 @@ fn test_update_fulfill_htlc_bolt2_update_fail_htlc_before_commitment() {
        let (_, our_payment_hash, our_payment_secret) = get_payment_preimage_hash!(nodes[1]);
        let net_graph_msg_handler = &nodes[0].net_graph_msg_handler;
        let route = get_route(&nodes[0].node.get_our_node_id(), &net_graph_msg_handler.network_graph.read().unwrap(), &nodes[1].node.get_our_node_id(), Some(InvoiceFeatures::known()), None, &[], 1000000, TEST_FINAL_CLTV, &logger).unwrap();
-       nodes[0].node.send_payment(&route, our_payment_hash, &None).unwrap();
+       nodes[0].node.send_payment(&route, our_payment_hash, &Some(our_payment_secret)).unwrap();
        check_added_monitors!(nodes[0], 1);
        let updates = get_htlc_update_msgs!(nodes[0], nodes[1].node.get_our_node_id());
        nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &updates.update_add_htlcs[0]);
@@ -6670,7 +6958,7 @@ fn test_update_fulfill_htlc_bolt2_update_fail_malformed_htlc_before_commitment()
        let (_, our_payment_hash, our_payment_secret) = get_payment_preimage_hash!(nodes[1]);
        let net_graph_msg_handler = &nodes[0].net_graph_msg_handler;
        let route = get_route(&nodes[0].node.get_our_node_id(), &net_graph_msg_handler.network_graph.read().unwrap(), &nodes[1].node.get_our_node_id(), Some(InvoiceFeatures::known()), None, &[], 1000000, TEST_FINAL_CLTV, &logger).unwrap();
-       nodes[0].node.send_payment(&route, our_payment_hash, &None).unwrap();
+       nodes[0].node.send_payment(&route, our_payment_hash, &Some(our_payment_secret)).unwrap();
        check_added_monitors!(nodes[0], 1);
        let updates = get_htlc_update_msgs!(nodes[0], nodes[1].node.get_our_node_id());
        nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &updates.update_add_htlcs[0]);
@@ -6701,7 +6989,7 @@ fn test_update_fulfill_htlc_bolt2_incorrect_htlc_id() {
 
        let our_payment_preimage = route_payment(&nodes[0], &[&nodes[1]], 100000).0;
 
-       nodes[1].node.claim_funds(our_payment_preimage, &None, 100_000);
+       nodes[1].node.claim_funds(our_payment_preimage);
        check_added_monitors!(nodes[1], 1);
 
        let events = nodes[1].node.get_and_clear_pending_msg_events();
@@ -6742,7 +7030,7 @@ fn test_update_fulfill_htlc_bolt2_wrong_preimage() {
 
        let our_payment_preimage = route_payment(&nodes[0], &[&nodes[1]], 100000).0;
 
-       nodes[1].node.claim_funds(our_payment_preimage, &None, 100_000);
+       nodes[1].node.claim_funds(our_payment_preimage);
        check_added_monitors!(nodes[1], 1);
 
        let events = nodes[1].node.get_and_clear_pending_msg_events();
@@ -6785,7 +7073,7 @@ fn test_update_fulfill_htlc_bolt2_missing_badonion_bit_for_malformed_htlc_messag
        let (_, our_payment_hash, our_payment_secret) = get_payment_preimage_hash!(nodes[1]);
        let net_graph_msg_handler = &nodes[0].net_graph_msg_handler;
        let route = get_route(&nodes[0].node.get_our_node_id(), &net_graph_msg_handler.network_graph.read().unwrap(), &nodes[1].node.get_our_node_id(), Some(InvoiceFeatures::known()), None, &[], 1000000, TEST_FINAL_CLTV, &logger).unwrap();
-       nodes[0].node.send_payment(&route, our_payment_hash, &None).unwrap();
+       nodes[0].node.send_payment(&route, our_payment_hash, &Some(our_payment_secret)).unwrap();
        check_added_monitors!(nodes[0], 1);
 
        let mut updates = get_htlc_update_msgs!(nodes[0], nodes[1].node.get_our_node_id());
@@ -6838,7 +7126,7 @@ fn test_update_fulfill_htlc_bolt2_after_malformed_htlc_message_must_forward_upda
        let mut payment_event = {
                let net_graph_msg_handler = &nodes[0].net_graph_msg_handler;
                let route = get_route(&nodes[0].node.get_our_node_id(), &net_graph_msg_handler.network_graph.read().unwrap(), &nodes[2].node.get_our_node_id(), Some(InvoiceFeatures::known()), None, &Vec::new(), 100000, TEST_FINAL_CLTV, &logger).unwrap();
-               nodes[0].node.send_payment(&route, our_payment_hash, &None).unwrap();
+               nodes[0].node.send_payment(&route, our_payment_hash, &Some(our_payment_secret)).unwrap();
                check_added_monitors!(nodes[0], 1);
                let mut events = nodes[0].node.get_and_clear_pending_msg_events();
                assert_eq!(events.len(), 1);
@@ -6922,7 +7210,7 @@ fn do_test_failure_delay_dust_htlc_local_commitment(announce_latest: bool) {
        let as_prev_commitment_tx = get_local_commitment_txn!(nodes[0], chan.2);
 
        // Fail one HTLC to prune it in the will-be-latest-local commitment tx
-       assert!(nodes[1].node.fail_htlc_backwards(&payment_hash_2, &None));
+       assert!(nodes[1].node.fail_htlc_backwards(&payment_hash_2));
        check_added_monitors!(nodes[1], 0);
        expect_pending_htlcs_forwardable!(nodes[1]);
        check_added_monitors!(nodes[1], 1);
@@ -7012,19 +7300,21 @@ fn do_test_sweep_outbound_htlc_failure_update(revoked: bool, local: bool) {
        // We revoked bs_commitment_tx
        if revoked {
                let (payment_preimage_3, _, _) = route_payment(&nodes[0], &[&nodes[1]], 1000000);
-               claim_payment(&nodes[0], &vec!(&nodes[1])[..], payment_preimage_3, 1_000_000);
+               claim_payment(&nodes[0], &vec!(&nodes[1])[..], payment_preimage_3);
        }
 
        let mut timeout_tx = Vec::new();
        if local {
                // We fail dust-HTLC 1 by broadcast of local commitment tx
                mine_transaction(&nodes[0], &as_commitment_tx[0]);
+               connect_blocks(&nodes[0], ANTI_REORG_DELAY - 1);
+               expect_payment_failed!(nodes[0], dust_hash, true);
+
+               connect_blocks(&nodes[0], TEST_FINAL_CLTV + LATENCY_GRACE_PERIOD_BLOCKS - ANTI_REORG_DELAY);
                check_closed_broadcast!(nodes[0], true);
                check_added_monitors!(nodes[0], 1);
                assert_eq!(nodes[0].node.get_and_clear_pending_events().len(), 0);
-               timeout_tx.push(nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap()[0].clone());
-               connect_blocks(&nodes[0], ANTI_REORG_DELAY - 1);
-               expect_payment_failed!(nodes[0], dust_hash, true);
+               timeout_tx.push(nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap()[1].clone());
                assert_eq!(timeout_tx[0].input[0].witness.last().unwrap().len(), OFFERED_HTLC_SCRIPT_WEIGHT);
                // We fail non-dust-HTLC 2 by broadcast of local HTLC-timeout tx on local commitment tx
                assert_eq!(nodes[0].node.get_and_clear_pending_events().len(), 0);
@@ -7037,8 +7327,8 @@ fn do_test_sweep_outbound_htlc_failure_update(revoked: bool, local: bool) {
                check_closed_broadcast!(nodes[0], true);
                check_added_monitors!(nodes[0], 1);
                assert_eq!(nodes[0].node.get_and_clear_pending_events().len(), 0);
-               timeout_tx.push(nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap()[0].clone());
-               connect_blocks(&nodes[0], ANTI_REORG_DELAY - 1);
+               connect_blocks(&nodes[0], TEST_FINAL_CLTV - 1); // Confirm blocks until the HTLC expires
+               timeout_tx.push(nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap()[1].clone());
                if !revoked {
                        expect_payment_failed!(nodes[0], dust_hash, true);
                        assert_eq!(timeout_tx[0].input[0].witness.last().unwrap().len(), ACCEPTED_HTLC_SCRIPT_WEIGHT);
@@ -7385,8 +7675,8 @@ fn test_data_loss_protect() {
        let mut previous_chain_monitor_state = test_utils::TestVecWriter(Vec::new());
        nodes[0].chain_monitor.chain_monitor.monitors.read().unwrap().iter().next().unwrap().1.write(&mut previous_chain_monitor_state).unwrap();
 
-       send_payment(&nodes[0], &vec!(&nodes[1])[..], 8000000, 8_000_000);
-       send_payment(&nodes[0], &vec!(&nodes[1])[..], 8000000, 8_000_000);
+       send_payment(&nodes[0], &vec!(&nodes[1])[..], 8000000);
+       send_payment(&nodes[0], &vec!(&nodes[1])[..], 8000000);
 
        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);
@@ -7395,7 +7685,7 @@ fn test_data_loss_protect() {
        logger = test_utils::TestLogger::with_id(format!("node {}", 0));
        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())};
+       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 };
        persister = test_utils::TestPersister::new();
        monitor = test_utils::TestChainMonitor::new(Some(&chain_source), &tx_broadcaster, &logger, &fee_estimator, &persister, keys_manager);
@@ -7464,7 +7754,7 @@ 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]);
 }
@@ -7478,16 +7768,30 @@ fn test_check_htlc_underpaying() {
        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 mut nodes = create_network(2, &node_cfgs, &node_chanmgrs);
 
        // Create some initial channels
        create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known());
 
-       let (payment_preimage, payment_hash, _) = route_payment(&nodes[0], &[&nodes[1]], 10_000);
+       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(), 10_000, TEST_FINAL_CLTV, nodes[0].logger).unwrap();
+       let (_, our_payment_hash, _) = get_payment_preimage_hash!(nodes[0]);
+       let our_payment_secret = nodes[1].node.create_inbound_payment_for_hash(our_payment_hash, Some(100_000), 7200, 0).unwrap();
+       nodes[0].node.send_payment(&route, our_payment_hash, &Some(our_payment_secret)).unwrap();
+       check_added_monitors!(nodes[0], 1);
 
-       // Node 3 is expecting payment of 100_000 but receive 10_000,
-       // fail htlc like we didn't know the preimage.
-       nodes[1].node.claim_funds(payment_preimage, &None, 100_000);
+       let mut events = nodes[0].node.get_and_clear_pending_msg_events();
+       assert_eq!(events.len(), 1);
+       let mut payment_event = SendEvent::from_event(events.pop().unwrap());
+       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);
+
+       // Note that we first have to wait a random delay before processing the receipt of the HTLC,
+       // and then will wait a second random delay before failing the HTLC back:
+       expect_pending_htlcs_forwardable!(nodes[1]);
+       expect_pending_htlcs_forwardable!(nodes[1]);
+
+       // Node 3 is expecting payment of 100_000 but received 10_000,
+       // it should fail htlc like we didn't know the preimage.
        nodes[1].node.process_pending_htlc_forwards();
 
        let events = nodes[1].node.get_and_clear_pending_msg_events();
@@ -7511,8 +7815,7 @@ fn test_check_htlc_underpaying() {
        // 10_000 msat as u64, followed by a height of CHAN_CONFIRM_DEPTH as u32
        let mut expected_failure_data = byte_utils::be64_to_array(10_000).to_vec();
        expected_failure_data.extend_from_slice(&byte_utils::be32_to_array(CHAN_CONFIRM_DEPTH));
-       expect_payment_failed!(nodes[0], payment_hash, true, 0x4000|15, &expected_failure_data[..]);
-       nodes[1].node.get_and_clear_pending_events();
+       expect_payment_failed!(nodes[0], our_payment_hash, true, 0x4000|15, &expected_failure_data[..]);
 }
 
 #[test]
@@ -7533,16 +7836,17 @@ fn test_announce_disable_channels() {
        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.timer_tick_occurred(); // dirty -> stagged
-       nodes[0].node.timer_tick_occurred(); // staged -> fresh
+       nodes[0].node.timer_tick_occurred(); // Enabled -> DisabledStaged
+       nodes[0].node.timer_tick_occurred(); // DisabledStaged -> Disabled
        let msg_events = nodes[0].node.get_and_clear_pending_msg_events();
        assert_eq!(msg_events.len(), 3);
+       let mut chans_disabled: HashSet<u64> = [short_id_1, short_id_2, short_id_3].iter().map(|a| *a).collect();
        for e in msg_events {
                match e {
                        MessageSendEvent::BroadcastChannelUpdate { ref msg } => {
-                               let short_id = msg.contents.short_channel_id;
-                               // Check generated channel_update match list in PendingChannelUpdate
-                               if short_id != short_id_1 && short_id != short_id_2 && short_id != short_id_3 {
+                               assert_eq!(msg.contents.flags & (1<<1), 1<<1); // The "channel disabled" bit should be set
+                               // Check that each channel gets updated exactly once
+                               if !chans_disabled.remove(&msg.contents.short_channel_id) {
                                        panic!("Generated ChannelUpdate for wrong chan!");
                                }
                        },
@@ -7575,6 +7879,22 @@ fn test_announce_disable_channels() {
 
        nodes[0].node.timer_tick_occurred();
        assert!(nodes[0].node.get_and_clear_pending_msg_events().is_empty());
+       nodes[0].node.timer_tick_occurred();
+       let msg_events = nodes[0].node.get_and_clear_pending_msg_events();
+       assert_eq!(msg_events.len(), 3);
+       chans_disabled = [short_id_1, short_id_2, short_id_3].iter().map(|a| *a).collect();
+       for e in msg_events {
+               match e {
+                       MessageSendEvent::BroadcastChannelUpdate { ref msg } => {
+                               assert_eq!(msg.contents.flags & (1<<1), 0); // The "channel disabled" bit should be off
+                               // Check that each channel gets updated exactly once
+                               if !chans_disabled.remove(&msg.contents.short_channel_id) {
+                                       panic!("Generated ChannelUpdate for wrong chan!");
+                               }
+                       },
+                       _ => panic!("Unexpected event"),
+               }
+       }
 }
 
 #[test]
@@ -7613,7 +7933,7 @@ fn test_bump_penalty_txn_on_revoked_commitment() {
        let header_114 = connect_blocks(&nodes[1], 14);
 
        // Actually revoke tx by claiming a HTLC
-       claim_payment(&nodes[0], &vec!(&nodes[1])[..], payment_preimage, 3_000_000);
+       claim_payment(&nodes[0], &vec!(&nodes[1])[..], payment_preimage);
        let header = BlockHeader { version: 0x20000000, prev_blockhash: header_114, merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
        connect_block(&nodes[1], &Block { header, txdata: vec![revoked_txn[0].clone()] });
        check_added_monitors!(nodes[1], 1);
@@ -7623,7 +7943,7 @@ fn test_bump_penalty_txn_on_revoked_commitment() {
        let feerate_1;
        {
                let mut node_txn = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap();
-               assert_eq!(node_txn.len(), 3); // justice tx (broadcasted from ChannelMonitor) + local commitment tx + local HTLC-timeout (broadcasted from ChannelManager)
+               assert_eq!(node_txn.len(), 2); // justice tx (broadcasted from ChannelMonitor) + local commitment tx
                assert_eq!(node_txn[0].input.len(), 3); // Penalty txn claims to_local, offered_htlc and received_htlc outputs
                assert_eq!(node_txn[0].output.len(), 1);
                check_spends!(node_txn[0], revoked_txn[0]);
@@ -7695,47 +8015,47 @@ fn test_bump_penalty_txn_on_revoked_htlcs() {
        let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
 
        let chan = create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1000000, 59000000, InitFeatures::known(), InitFeatures::known());
-       // Lock HTLC in both directions
-       let payment_preimage = route_payment(&nodes[0], &vec!(&nodes[1])[..], 3_000_000).0;
-       route_payment(&nodes[1], &vec!(&nodes[0])[..], 3_000_000).0;
+       // Lock HTLC in both directions (using a slightly lower CLTV delay to provide timely RBF bumps)
+       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(), 3_000_000, 50, nodes[0].logger).unwrap();
+       let payment_preimage = send_along_route(&nodes[0], route, &[&nodes[1]], 3_000_000).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(), 3_000_000, 50, nodes[0].logger).unwrap();
+       send_along_route(&nodes[1], route, &[&nodes[0]], 3_000_000);
 
        let revoked_local_txn = get_local_commitment_txn!(nodes[1], chan.2);
        assert_eq!(revoked_local_txn[0].input.len(), 1);
        assert_eq!(revoked_local_txn[0].input[0].previous_output.txid, chan.3.txid());
 
        // Revoke local commitment tx
-       claim_payment(&nodes[0], &vec!(&nodes[1])[..], payment_preimage, 3_000_000);
+       claim_payment(&nodes[0], &vec!(&nodes[1])[..], payment_preimage);
 
        let header = BlockHeader { version: 0x20000000, prev_blockhash: nodes[1].best_block_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
        // B will generate both revoked HTLC-timeout/HTLC-preimage txn from revoked commitment tx
        connect_block(&nodes[1], &Block { header, txdata: vec![revoked_local_txn[0].clone()] });
        check_closed_broadcast!(nodes[1], true);
        check_added_monitors!(nodes[1], 1);
+       connect_blocks(&nodes[1], 49); // Confirm blocks until the HTLC expires (note CLTV was explicitly 50 above)
 
        let revoked_htlc_txn = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap();
-       assert_eq!(revoked_htlc_txn.len(), 4);
-       if revoked_htlc_txn[0].input[0].witness.last().unwrap().len() == ACCEPTED_HTLC_SCRIPT_WEIGHT {
-               assert_eq!(revoked_htlc_txn[0].input.len(), 1);
-               check_spends!(revoked_htlc_txn[0], revoked_local_txn[0]);
-               assert_eq!(revoked_htlc_txn[1].input.len(), 1);
-               assert_eq!(revoked_htlc_txn[1].input[0].witness.last().unwrap().len(), OFFERED_HTLC_SCRIPT_WEIGHT);
-               assert_eq!(revoked_htlc_txn[1].output.len(), 1);
-               check_spends!(revoked_htlc_txn[1], revoked_local_txn[0]);
-       } else if revoked_htlc_txn[1].input[0].witness.last().unwrap().len() == ACCEPTED_HTLC_SCRIPT_WEIGHT {
-               assert_eq!(revoked_htlc_txn[1].input.len(), 1);
-               check_spends!(revoked_htlc_txn[1], revoked_local_txn[0]);
-               assert_eq!(revoked_htlc_txn[0].input.len(), 1);
-               assert_eq!(revoked_htlc_txn[0].input[0].witness.last().unwrap().len(), OFFERED_HTLC_SCRIPT_WEIGHT);
-               assert_eq!(revoked_htlc_txn[0].output.len(), 1);
-               check_spends!(revoked_htlc_txn[0], revoked_local_txn[0]);
-       }
+       assert_eq!(revoked_htlc_txn.len(), 3);
+       check_spends!(revoked_htlc_txn[1], chan.3);
+
+       assert_eq!(revoked_htlc_txn[0].input[0].witness.last().unwrap().len(), ACCEPTED_HTLC_SCRIPT_WEIGHT);
+       assert_eq!(revoked_htlc_txn[0].input.len(), 1);
+       check_spends!(revoked_htlc_txn[0], revoked_local_txn[0]);
+
+       assert_eq!(revoked_htlc_txn[2].input.len(), 1);
+       assert_eq!(revoked_htlc_txn[2].input[0].witness.last().unwrap().len(), OFFERED_HTLC_SCRIPT_WEIGHT);
+       assert_eq!(revoked_htlc_txn[2].output.len(), 1);
+       check_spends!(revoked_htlc_txn[2], revoked_local_txn[0]);
 
        // Broadcast set of revoked txn on A
        let hash_128 = connect_blocks(&nodes[0], 40);
        let header_11 = BlockHeader { version: 0x20000000, prev_blockhash: hash_128, merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
        connect_block(&nodes[0], &Block { header: header_11, txdata: vec![revoked_local_txn[0].clone()] });
        let header_129 = BlockHeader { version: 0x20000000, prev_blockhash: header_11.block_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
-       connect_block(&nodes[0], &Block { header: header_129, txdata: vec![revoked_htlc_txn[0].clone(), revoked_htlc_txn[1].clone()] });
+       connect_block(&nodes[0], &Block { header: header_129, txdata: vec![revoked_htlc_txn[0].clone(), revoked_htlc_txn[2].clone()] });
        expect_pending_htlcs_forwardable_ignore!(nodes[0]);
        let first;
        let feerate_1;
@@ -7764,7 +8084,7 @@ fn test_bump_penalty_txn_on_revoked_htlcs() {
                assert_ne!(node_txn[1].input[0].previous_output, node_txn[2].input[0].previous_output);
 
                assert_eq!(node_txn[0].input[0].previous_output, revoked_htlc_txn[0].input[0].previous_output);
-               assert_eq!(node_txn[1].input[0].previous_output, revoked_htlc_txn[1].input[0].previous_output);
+               assert_eq!(node_txn[1].input[0].previous_output, revoked_htlc_txn[2].input[0].previous_output);
 
                // node_txn[3] is the local commitment tx broadcast just because (and somewhat in case of
                // reorgs, though its not clear its ever worth broadcasting conflicting txn like this when
@@ -7775,11 +8095,11 @@ fn test_bump_penalty_txn_on_revoked_htlcs() {
                // output, checked above).
                assert_eq!(node_txn[4].input.len(), 2);
                assert_eq!(node_txn[4].output.len(), 1);
-               check_spends!(node_txn[4], revoked_htlc_txn[0], revoked_htlc_txn[1]);
+               check_spends!(node_txn[4], revoked_htlc_txn[0], revoked_htlc_txn[2]);
 
                first = node_txn[4].txid();
                // Store both feerates for later comparison
-               let fee_1 = revoked_htlc_txn[0].output[0].value + revoked_htlc_txn[1].output[0].value - node_txn[4].output[0].value;
+               let fee_1 = revoked_htlc_txn[0].output[0].value + revoked_htlc_txn[2].output[0].value - node_txn[4].output[0].value;
                feerate_1 = fee_1 * 1000 / node_txn[4].get_weight() as u64;
                penalty_txn = vec![node_txn[2].clone()];
                node_txn.clear();
@@ -7798,9 +8118,9 @@ fn test_bump_penalty_txn_on_revoked_htlcs() {
                check_spends!(node_txn[1], revoked_local_txn[0]);
                // Note that these are both bogus - they spend outputs already claimed in block 129:
                if node_txn[0].input[0].previous_output == revoked_htlc_txn[0].input[0].previous_output  {
-                       assert_eq!(node_txn[1].input[0].previous_output, revoked_htlc_txn[1].input[0].previous_output);
+                       assert_eq!(node_txn[1].input[0].previous_output, revoked_htlc_txn[2].input[0].previous_output);
                } else {
-                       assert_eq!(node_txn[0].input[0].previous_output, revoked_htlc_txn[1].input[0].previous_output);
+                       assert_eq!(node_txn[0].input[0].previous_output, revoked_htlc_txn[2].input[0].previous_output);
                        assert_eq!(node_txn[1].input[0].previous_output, revoked_htlc_txn[0].input[0].previous_output);
                }
 
@@ -7816,10 +8136,10 @@ fn test_bump_penalty_txn_on_revoked_htlcs() {
                assert_eq!(node_txn.len(), 1);
 
                assert_eq!(node_txn[0].input.len(), 2);
-               check_spends!(node_txn[0], revoked_htlc_txn[0], revoked_htlc_txn[1]);
+               check_spends!(node_txn[0], revoked_htlc_txn[0], revoked_htlc_txn[2]);
                // Verify bumped tx is different and 25% bump heuristic
                assert_ne!(first, node_txn[0].txid());
-               let fee_2 = revoked_htlc_txn[0].output[0].value + revoked_htlc_txn[1].output[0].value - node_txn[0].output[0].value;
+               let fee_2 = revoked_htlc_txn[0].output[0].value + revoked_htlc_txn[2].output[0].value - node_txn[0].output[0].value;
                let feerate_2 = fee_2 * 1000 / node_txn[0].get_weight() as u64;
                assert!(feerate_2 * 100 > feerate_1 * 125);
                let txn = vec![node_txn[0].clone()];
@@ -7870,46 +8190,47 @@ fn test_bump_penalty_txn_on_remote_commitment() {
        assert_eq!(remote_txn[0].input[0].previous_output.txid, chan.3.txid());
 
        // Claim a HTLC without revocation (provide B monitor with preimage)
-       nodes[1].node.claim_funds(payment_preimage, &None, 3_000_000);
+       nodes[1].node.claim_funds(payment_preimage);
        mine_transaction(&nodes[1], &remote_txn[0]);
        check_added_monitors!(nodes[1], 2);
+       connect_blocks(&nodes[1], TEST_FINAL_CLTV - 1); // Confirm blocks until the HTLC expires
 
        // One or more claim tx should have been broadcast, check it
        let timeout;
        let preimage;
+       let preimage_bump;
        let feerate_timeout;
        let feerate_preimage;
        {
                let mut node_txn = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap();
-               assert_eq!(node_txn.len(), 5); // 2 * claim tx (broadcasted from ChannelMonitor) + local commitment tx + local HTLC-timeout + local HTLC-success (broadcasted from ChannelManager)
+               // 9 transactions including:
+               // 1*2 ChannelManager local broadcasts of commitment + HTLC-Success
+               // 1*3 ChannelManager local broadcasts of commitment + HTLC-Success + HTLC-Timeout
+               // 2 * HTLC-Success (one RBF bump we'll check later)
+               // 1 * HTLC-Timeout
+               assert_eq!(node_txn.len(), 8);
                assert_eq!(node_txn[0].input.len(), 1);
-               assert_eq!(node_txn[1].input.len(), 1);
+               assert_eq!(node_txn[6].input.len(), 1);
                check_spends!(node_txn[0], remote_txn[0]);
-               check_spends!(node_txn[1], remote_txn[0]);
-               check_spends!(node_txn[2], chan.3);
-               check_spends!(node_txn[3], node_txn[2]);
-               check_spends!(node_txn[4], node_txn[2]);
-               if node_txn[0].input[0].witness.last().unwrap().len() == ACCEPTED_HTLC_SCRIPT_WEIGHT {
-                       timeout = node_txn[0].txid();
-                       let index = node_txn[0].input[0].previous_output.vout;
-                       let fee = remote_txn[0].output[index as usize].value - node_txn[0].output[0].value;
-                       feerate_timeout = fee * 1000 / node_txn[0].get_weight() as u64;
-
-                       preimage = node_txn[1].txid();
-                       let index = node_txn[1].input[0].previous_output.vout;
-                       let fee = remote_txn[0].output[index as usize].value - node_txn[1].output[0].value;
-                       feerate_preimage = fee * 1000 / node_txn[1].get_weight() as u64;
-               } else {
-                       timeout = node_txn[1].txid();
-                       let index = node_txn[1].input[0].previous_output.vout;
-                       let fee = remote_txn[0].output[index as usize].value - node_txn[1].output[0].value;
-                       feerate_timeout = fee * 1000 / node_txn[1].get_weight() as u64;
-
-                       preimage = node_txn[0].txid();
-                       let index = node_txn[0].input[0].previous_output.vout;
-                       let fee = remote_txn[0].output[index as usize].value - node_txn[0].output[0].value;
-                       feerate_preimage = fee * 1000 / node_txn[0].get_weight() as u64;
-               }
+               check_spends!(node_txn[6], remote_txn[0]);
+               assert_eq!(node_txn[0].input[0].previous_output, node_txn[3].input[0].previous_output);
+               preimage_bump = node_txn[3].clone();
+
+               check_spends!(node_txn[1], chan.3);
+               check_spends!(node_txn[2], node_txn[1]);
+               assert_eq!(node_txn[1], node_txn[4]);
+               assert_eq!(node_txn[2], node_txn[5]);
+
+               timeout = node_txn[6].txid();
+               let index = node_txn[6].input[0].previous_output.vout;
+               let fee = remote_txn[0].output[index as usize].value - node_txn[6].output[0].value;
+               feerate_timeout = fee * 1000 / node_txn[6].get_weight() as u64;
+
+               preimage = node_txn[0].txid();
+               let index = node_txn[0].input[0].previous_output.vout;
+               let fee = remote_txn[0].output[index as usize].value - node_txn[0].output[0].value;
+               feerate_preimage = fee * 1000 / node_txn[0].get_weight() as u64;
+
                node_txn.clear();
        };
        assert_ne!(feerate_timeout, 0);
@@ -7919,36 +8240,24 @@ fn test_bump_penalty_txn_on_remote_commitment() {
        connect_blocks(&nodes[1], 15);
        {
                let mut node_txn = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap();
-               assert_eq!(node_txn.len(), 2);
+               assert_eq!(node_txn.len(), 1);
                assert_eq!(node_txn[0].input.len(), 1);
-               assert_eq!(node_txn[1].input.len(), 1);
+               assert_eq!(preimage_bump.input.len(), 1);
                check_spends!(node_txn[0], remote_txn[0]);
-               check_spends!(node_txn[1], remote_txn[0]);
-               if node_txn[0].input[0].witness.last().unwrap().len() == ACCEPTED_HTLC_SCRIPT_WEIGHT {
-                       let index = node_txn[0].input[0].previous_output.vout;
-                       let fee = remote_txn[0].output[index as usize].value - node_txn[0].output[0].value;
-                       let new_feerate = fee * 1000 / node_txn[0].get_weight() as u64;
-                       assert!(new_feerate * 100 > feerate_timeout * 125);
-                       assert_ne!(timeout, node_txn[0].txid());
-
-                       let index = node_txn[1].input[0].previous_output.vout;
-                       let fee = remote_txn[0].output[index as usize].value - node_txn[1].output[0].value;
-                       let new_feerate = fee * 1000 / node_txn[1].get_weight() as u64;
-                       assert!(new_feerate * 100 > feerate_preimage * 125);
-                       assert_ne!(preimage, node_txn[1].txid());
-               } else {
-                       let index = node_txn[1].input[0].previous_output.vout;
-                       let fee = remote_txn[0].output[index as usize].value - node_txn[1].output[0].value;
-                       let new_feerate = fee * 1000 / node_txn[1].get_weight() as u64;
-                       assert!(new_feerate * 100 > feerate_timeout * 125);
-                       assert_ne!(timeout, node_txn[1].txid());
-
-                       let index = node_txn[0].input[0].previous_output.vout;
-                       let fee = remote_txn[0].output[index as usize].value - node_txn[0].output[0].value;
-                       let new_feerate = fee * 1000 / node_txn[0].get_weight() as u64;
-                       assert!(new_feerate * 100 > feerate_preimage * 125);
-                       assert_ne!(preimage, node_txn[0].txid());
-               }
+               check_spends!(preimage_bump, remote_txn[0]);
+
+               let index = preimage_bump.input[0].previous_output.vout;
+               let fee = remote_txn[0].output[index as usize].value - preimage_bump.output[0].value;
+               let new_feerate = fee * 1000 / preimage_bump.get_weight() as u64;
+               assert!(new_feerate * 100 > feerate_timeout * 125);
+               assert_ne!(timeout, preimage_bump.txid());
+
+               let index = node_txn[0].input[0].previous_output.vout;
+               let fee = remote_txn[0].output[index as usize].value - node_txn[0].output[0].value;
+               let new_feerate = fee * 1000 / node_txn[0].get_weight() as u64;
+               assert!(new_feerate * 100 > feerate_preimage * 125);
+               assert_ne!(preimage, node_txn[0].txid());
+
                node_txn.clear();
        }
 
@@ -8007,10 +8316,10 @@ fn test_bump_txn_sanitize_tracking_maps() {
        assert_eq!(revoked_local_txn[0].input[0].previous_output.txid, chan.3.txid());
 
        // Revoke local commitment tx
-       claim_payment(&nodes[0], &vec!(&nodes[1])[..], payment_preimage, 9_000_000);
+       claim_payment(&nodes[0], &vec!(&nodes[1])[..], payment_preimage);
 
        // Broadcast set of revoked txn on A
-       connect_blocks(&nodes[0], 52 - CHAN_CONFIRM_DEPTH);
+       connect_blocks(&nodes[0], TEST_FINAL_CLTV + 2 - CHAN_CONFIRM_DEPTH);
        expect_pending_htlcs_forwardable_ignore!(nodes[0]);
        assert_eq!(nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().len(), 0);
 
@@ -8076,30 +8385,6 @@ fn test_override_0msat_htlc_minimum() {
        assert_eq!(res.htlc_minimum_msat, 1);
 }
 
-#[test]
-fn test_simple_payment_secret() {
-       // Simple test of sending a payment with a payment_secret present. This does not use any AMP
-       // features, however.
-       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 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 logger = test_utils::TestLogger::new();
-
-       let (payment_preimage, payment_hash, payment_secret) = get_payment_preimage_hash!(&nodes[0]);
-       let net_graph_msg_handler = &nodes[0].net_graph_msg_handler;
-       let route = get_route(&nodes[0].node.get_our_node_id(), &net_graph_msg_handler.network_graph.read().unwrap(), &nodes[2].node.get_our_node_id(), None, None, &[], 100000, TEST_FINAL_CLTV, &logger).unwrap();
-       send_along_route_with_secret(&nodes[0], route, &[&[&nodes[1], &nodes[2]]], 100000, payment_hash, Some(payment_secret.clone()));
-       // Claiming with all the correct values but the wrong secret should result in nothing...
-       assert_eq!(nodes[2].node.claim_funds(payment_preimage, &None, 100_000), false);
-       assert_eq!(nodes[2].node.claim_funds(payment_preimage, &Some(PaymentSecret([42; 32])), 100_000), false);
-       // ...but with the right secret we should be able to claim all the way back
-       claim_payment_along_route_with_secret(&nodes[0], &[&[&nodes[1], &nodes[2]]], false, payment_preimage, Some(payment_secret.clone()), 100_000);
-}
-
 #[test]
 fn test_simple_mpp() {
        // Simple test of sending a multi-path payment.
@@ -8125,12 +8410,179 @@ fn test_simple_mpp() {
        route.paths[1][0].pubkey = nodes[2].node.get_our_node_id();
        route.paths[1][0].short_channel_id = chan_2_id;
        route.paths[1][1].short_channel_id = chan_4_id;
-       send_along_route_with_secret(&nodes[0], route, &[&[&nodes[1], &nodes[3]], &[&nodes[2], &nodes[3]]], 200_000, payment_hash, Some(payment_secret.clone()));
-       // Claiming with all the correct values but the wrong secret should result in nothing...
-       assert_eq!(nodes[3].node.claim_funds(payment_preimage, &None, 200_000), false);
-       assert_eq!(nodes[3].node.claim_funds(payment_preimage, &Some(PaymentSecret([42; 32])), 200_000), false);
-       // ...but with the right secret we should be able to claim all the way back
-       claim_payment_along_route_with_secret(&nodes[0], &[&[&nodes[1], &nodes[3]], &[&nodes[2], &nodes[3]]], false, payment_preimage, Some(payment_secret), 200_000);
+       send_along_route_with_secret(&nodes[0], route, &[&[&nodes[1], &nodes[3]], &[&nodes[2], &nodes[3]]], 200_000, payment_hash, payment_secret);
+       claim_payment_along_route(&nodes[0], &[&[&nodes[1], &nodes[3]], &[&nodes[2], &nodes[3]]], false, payment_preimage);
+}
+
+#[test]
+fn test_preimage_storage() {
+       // Simple test of payment preimage storage allowing no client-side storage to claim payments
+       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);
+
+       create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known()).0.contents.short_channel_id;
+
+       {
+               let (payment_hash, payment_secret) = nodes[1].node.create_inbound_payment(Some(100_000), 7200, 42);
+
+               let logger = test_utils::TestLogger::new();
+               let net_graph_msg_handler = &nodes[0].net_graph_msg_handler;
+               let route = get_route(&nodes[0].node.get_our_node_id(), &net_graph_msg_handler.network_graph.read().unwrap(), &nodes[1].node.get_our_node_id(), Some(InvoiceFeatures::known()), None, &[], 100_000, TEST_FINAL_CLTV, &logger).unwrap();
+               nodes[0].node.send_payment(&route, payment_hash, &Some(payment_secret)).unwrap();
+               check_added_monitors!(nodes[0], 1);
+               let mut events = nodes[0].node.get_and_clear_pending_msg_events();
+               let mut payment_event = SendEvent::from_event(events.pop().unwrap());
+               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);
+       }
+       // Note that after leaving the above scope we have no knowledge of any arguments or return
+       // values from previous calls.
+       expect_pending_htlcs_forwardable!(nodes[1]);
+       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());
+               },
+               _ => panic!("Unexpected event"),
+       }
+}
+
+#[test]
+fn test_secret_timeout() {
+       // Simple test of payment secret storage time outs
+       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);
+
+       create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known()).0.contents.short_channel_id;
+
+       let (payment_hash, payment_secret_1) = nodes[1].node.create_inbound_payment(Some(100_000), 2, 0);
+
+       // We should fail to register the same payment hash twice, at least until we've connected a
+       // block with time 7200 + CHAN_CONFIRM_DEPTH + 1.
+       if let Err(APIError::APIMisuseError { err }) = nodes[1].node.create_inbound_payment_for_hash(payment_hash, Some(100_000), 2, 0) {
+               assert_eq!(err, "Duplicate payment hash");
+       } else { panic!(); }
+       let mut block = {
+               let node_1_blocks = nodes[1].blocks.lock().unwrap();
+               Block {
+                       header: BlockHeader {
+                               version: 0x2000000,
+                               prev_blockhash: node_1_blocks.last().unwrap().0.block_hash(),
+                               merkle_root: Default::default(),
+                               time: node_1_blocks.len() as u32 + 7200, bits: 42, nonce: 42 },
+                       txdata: vec![],
+               }
+       };
+       connect_block(&nodes[1], &block);
+       if let Err(APIError::APIMisuseError { err }) = nodes[1].node.create_inbound_payment_for_hash(payment_hash, Some(100_000), 2, 0) {
+               assert_eq!(err, "Duplicate payment hash");
+       } else { panic!(); }
+
+       // If we then connect the second block, we should be able to register the same payment hash
+       // again with a different user_payment_id (this time getting a new payment secret).
+       block.header.prev_blockhash = block.header.block_hash();
+       block.header.time += 1;
+       connect_block(&nodes[1], &block);
+       let our_payment_secret = nodes[1].node.create_inbound_payment_for_hash(payment_hash, Some(100_000), 2, 42).unwrap();
+       assert_ne!(payment_secret_1, our_payment_secret);
+
+       {
+               let logger = test_utils::TestLogger::new();
+               let net_graph_msg_handler = &nodes[0].net_graph_msg_handler;
+               let route = get_route(&nodes[0].node.get_our_node_id(), &net_graph_msg_handler.network_graph.read().unwrap(), &nodes[1].node.get_our_node_id(), Some(InvoiceFeatures::known()), None, &[], 100_000, TEST_FINAL_CLTV, &logger).unwrap();
+               nodes[0].node.send_payment(&route, payment_hash, &Some(our_payment_secret)).unwrap();
+               check_added_monitors!(nodes[0], 1);
+               let mut events = nodes[0].node.get_and_clear_pending_msg_events();
+               let mut payment_event = SendEvent::from_event(events.pop().unwrap());
+               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);
+       }
+       // Note that after leaving the above scope we have no knowledge of any arguments or return
+       // values from previous calls.
+       expect_pending_htlcs_forwardable!(nodes[1]);
+       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, .. } => {
+                       assert!(payment_preimage.is_none());
+                       assert_eq!(user_payment_id, 42);
+                       assert_eq!(payment_secret, our_payment_secret);
+                       // We don't actually have the payment preimage with which to claim this payment!
+               },
+               _ => panic!("Unexpected event"),
+       }
+}
+
+#[test]
+fn test_bad_secret_hash() {
+       // Simple test of unregistered payment hash/invalid payment secret handling
+       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);
+
+       create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known()).0.contents.short_channel_id;
+
+       let random_payment_hash = PaymentHash([42; 32]);
+       let random_payment_secret = PaymentSecret([43; 32]);
+       let (our_payment_hash, our_payment_secret) = nodes[1].node.create_inbound_payment(Some(100_000), 2, 0);
+
+       let logger = test_utils::TestLogger::new();
+       let net_graph_msg_handler = &nodes[0].net_graph_msg_handler;
+       let route = get_route(&nodes[0].node.get_our_node_id(), &net_graph_msg_handler.network_graph.read().unwrap(), &nodes[1].node.get_our_node_id(), Some(InvoiceFeatures::known()), None, &[], 100_000, TEST_FINAL_CLTV, &logger).unwrap();
+
+       // All the below cases should end up being handled exactly identically, so we macro the
+       // resulting events.
+       macro_rules! handle_unknown_invalid_payment_data {
+               () => {
+                       check_added_monitors!(nodes[0], 1);
+                       let mut events = nodes[0].node.get_and_clear_pending_msg_events();
+                       let payment_event = SendEvent::from_event(events.pop().unwrap());
+                       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);
+
+                       // We have to forward pending HTLCs once to process the receipt of the HTLC and then
+                       // again to process the pending backwards-failure of the HTLC
+                       expect_pending_htlcs_forwardable!(nodes[1]);
+                       expect_pending_htlcs_forwardable!(nodes[1]);
+                       check_added_monitors!(nodes[1], 1);
+
+                       // We should fail the payment back
+                       let mut events = nodes[1].node.get_and_clear_pending_msg_events();
+                       match events.pop().unwrap() {
+                               MessageSendEvent::UpdateHTLCs { node_id: _, updates: msgs::CommitmentUpdate { update_fail_htlcs, commitment_signed, .. } } => {
+                                       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);
+                               },
+                               _ => panic!("Unexpected event"),
+                       }
+               }
+       }
+
+       let expected_error_code = 0x4000|15; // incorrect_or_unknown_payment_details
+       // Error data is the HTLC value (100,000) and current block height
+       let expected_error_data = [0, 0, 0, 0, 0, 1, 0x86, 0xa0, 0, 0, 0, CHAN_CONFIRM_DEPTH as u8];
+
+       // Send a payment with the right payment hash but the wrong payment secret
+       nodes[0].node.send_payment(&route, our_payment_hash, &Some(random_payment_secret)).unwrap();
+       handle_unknown_invalid_payment_data!();
+       expect_payment_failed!(nodes[0], our_payment_hash, true, expected_error_code, expected_error_data);
+
+       // Send a payment with a random payment hash, but the right payment secret
+       nodes[0].node.send_payment(&route, random_payment_hash, &Some(our_payment_secret)).unwrap();
+       handle_unknown_invalid_payment_data!();
+       expect_payment_failed!(nodes[0], random_payment_hash, true, expected_error_code, expected_error_data);
+
+       // Send a payment with a random payment hash and random payment secret
+       nodes[0].node.send_payment(&route, random_payment_hash, &Some(random_payment_secret)).unwrap();
+       handle_unknown_invalid_payment_data!();
+       expect_payment_failed!(nodes[0], random_payment_hash, true, expected_error_code, expected_error_data);
 }
 
 #[test]
@@ -8153,7 +8605,7 @@ fn test_update_err_monitor_lockdown() {
        let outpoint = OutPoint { txid: chan_1.3.txid(), index: 0 };
 
        // Rebalance the network to generate htlc in the two directions
-       send_payment(&nodes[0], &vec!(&nodes[1])[..], 10_000_000, 10_000_000);
+       send_payment(&nodes[0], &vec!(&nodes[1])[..], 10_000_000);
 
        // Route a HTLC from node 0 to node 1 (but don't settle)
        let preimage = route_payment(&nodes[0], &vec!(&nodes[1])[..], 9_000_000).0;
@@ -8175,10 +8627,13 @@ fn test_update_err_monitor_lockdown() {
                watchtower
        };
        let header = BlockHeader { version: 0x20000000, prev_blockhash: Default::default(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
+       // Make the tx_broadcaster aware of enough blocks that it doesn't think we're violating
+       // transaction lock time requirements here.
+       chanmon_cfgs[0].tx_broadcaster.blocks.lock().unwrap().resize(200, (header, 0));
        watchtower.chain_monitor.block_connected(&Block { header, txdata: vec![] }, 200);
 
        // Try to update ChannelMonitor
-       assert!(nodes[1].node.claim_funds(preimage, &None, 9_000_000));
+       assert!(nodes[1].node.claim_funds(preimage));
        check_added_monitors!(nodes[1], 1);
        let updates = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
        assert_eq!(updates.update_fulfill_htlcs.len(), 1);
@@ -8212,7 +8667,7 @@ fn test_concurrent_monitor_claim() {
        let outpoint = OutPoint { txid: chan_1.3.txid(), index: 0 };
 
        // Rebalance the network to generate htlc in the two directions
-       send_payment(&nodes[0], &vec!(&nodes[1])[..], 10_000_000, 10_000_000);
+       send_payment(&nodes[0], &vec!(&nodes[1])[..], 10_000_000);
 
        // Route a HTLC from node 0 to node 1 (but don't settle)
        route_payment(&nodes[0], &vec!(&nodes[1])[..], 9_000_000).0;
@@ -8234,6 +8689,9 @@ fn test_concurrent_monitor_claim() {
                watchtower
        };
        let header = BlockHeader { version: 0x20000000, prev_blockhash: Default::default(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
+       // Make the tx_broadcaster aware of enough blocks that it doesn't think we're violating
+       // transaction lock time requirements here.
+       chanmon_cfgs[0].tx_broadcaster.blocks.lock().unwrap().resize((CHAN_CONFIRM_DEPTH + 1 + TEST_FINAL_CLTV + LATENCY_GRACE_PERIOD_BLOCKS) as usize, (header, 0));
        watchtower_alice.chain_monitor.block_connected(&Block { header, txdata: vec![] }, CHAN_CONFIRM_DEPTH + 1 + TEST_FINAL_CLTV + LATENCY_GRACE_PERIOD_BLOCKS);
 
        // Watchtower Alice should have broadcast a commitment/HTLC-timeout
@@ -8267,7 +8725,7 @@ fn test_concurrent_monitor_claim() {
        {
                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(), 3000000 , TEST_FINAL_CLTV, &logger).unwrap();
-               nodes[1].node.send_payment(&route, payment_hash, &None).unwrap();
+               nodes[1].node.send_payment(&route, payment_hash, &Some(payment_secret)).unwrap();
        }
        check_added_monitors!(nodes[1], 1);
 
@@ -8365,7 +8823,7 @@ fn test_htlc_no_detection() {
        // Create some initial channels
        let chan_1 = create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 100000, 10001, InitFeatures::known(), InitFeatures::known());
 
-       send_payment(&nodes[0], &vec!(&nodes[1])[..], 1_000_000, 1_000_000);
+       send_payment(&nodes[0], &vec!(&nodes[1])[..], 1_000_000);
        let (_, our_payment_hash, _) = route_payment(&nodes[0], &vec!(&nodes[1])[..], 2_000_000);
        let local_txn = get_local_commitment_txn!(nodes[0], chan_1.2);
        assert_eq!(local_txn[0].input.len(), 1);
@@ -8380,16 +8838,17 @@ fn test_htlc_no_detection() {
        chain::Listen::block_connected(&nodes[0].chain_monitor.chain_monitor, &Block { header, txdata: vec![local_txn[0].clone()] }, nodes[0].best_block_info().1 + 1);
        check_closed_broadcast!(nodes[0], true);
        check_added_monitors!(nodes[0], 1);
+       connect_blocks(&nodes[0], TEST_FINAL_CLTV - 1);
 
        let htlc_timeout = {
                let node_txn = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap();
-               assert_eq!(node_txn[0].input.len(), 1);
-               assert_eq!(node_txn[0].input[0].witness.last().unwrap().len(), OFFERED_HTLC_SCRIPT_WEIGHT);
-               check_spends!(node_txn[0], local_txn[0]);
-               node_txn[0].clone()
+               assert_eq!(node_txn[1].input.len(), 1);
+               assert_eq!(node_txn[1].input[0].witness.last().unwrap().len(), OFFERED_HTLC_SCRIPT_WEIGHT);
+               check_spends!(node_txn[1], local_txn[0]);
+               node_txn[1].clone()
        };
 
-       let header_201 = BlockHeader { version: 0x20000000, prev_blockhash: header.block_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
+       let header_201 = BlockHeader { version: 0x20000000, prev_blockhash: nodes[0].best_block_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
        connect_block(&nodes[0], &Block { header: header_201, txdata: vec![htlc_timeout.clone()] });
        connect_blocks(&nodes[0], ANTI_REORG_DELAY - 1);
        expect_payment_failed!(nodes[0], our_payment_hash, true);
@@ -8457,7 +8916,7 @@ fn do_test_onchain_htlc_settlement_after_close(broadcast_alice: bool, go_onchain
        // Step (5):
        // Carol then claims the funds and sends an update_fulfill message to Bob, and they go through the
        // process of removing the HTLC from their commitment transactions.
-       assert!(nodes[2].node.claim_funds(payment_preimage, &None, 3_000_000));
+       assert!(nodes[2].node.claim_funds(payment_preimage));
        check_added_monitors!(nodes[2], 1);
        let carol_updates = get_htlc_update_msgs!(nodes[2], nodes[1].node.get_our_node_id());
        assert!(carol_updates.update_add_htlcs.is_empty());
@@ -8711,7 +9170,7 @@ fn test_duplicate_chan_id() {
        let (funding_locked, _) = create_chan_between_nodes_with_value_confirm(&nodes[0], &nodes[1], &tx);
        let (announcement, as_update, bs_update) = create_chan_between_nodes_with_value_b(&nodes[0], &nodes[1], &funding_locked);
        update_nodes_with_chan_announce(&nodes, 0, 1, &announcement, &as_update, &bs_update);
-       send_payment(&nodes[0], &[&nodes[1]], 8000000, 8_000_000);
+       send_payment(&nodes[0], &[&nodes[1]], 8000000);
 }
 
 #[test]
@@ -8827,3 +9286,86 @@ 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);
+}