_ Git - rust-lightning/blob - lightning/src/ln/priv_short_conf_tests.rs

   1 // This file is Copyright its original authors, visible in version control
   2 // history.
   3 //
   4 // This file is licensed under the Apache License, Version 2.0 <LICENSE-APACHE
   5 // or http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   6 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your option.
   7 // You may not use this file except in accordance with one or both of these
   8 // licenses.
   9
  10 //! Tests that test ChannelManager behavior with fewer confirmations required than the default and
  11 //! other behavior that exists only on private channels or with a semi-trusted counterparty (eg
  12 //! LSP).
  13
  14 use chain::{ChannelMonitorUpdateErr, Watch};
  15 use chain::channelmonitor::ChannelMonitor;
  16 use chain::keysinterface::{Recipient, KeysInterface};
  17 use ln::channelmanager::{ChannelManager, ChannelManagerReadArgs, MIN_CLTV_EXPIRY_DELTA};
  18 use routing::network_graph::RoutingFees;
  19 use routing::router::{PaymentParameters, RouteHint, RouteHintHop};
  20 use ln::features::{InitFeatures, InvoiceFeatures};
  21 use ln::msgs;
  22 use ln::msgs::{ChannelMessageHandler, RoutingMessageHandler, OptionalField, ChannelUpdate};
  23 use ln::wire::Encode;
  24 use util::enforcing_trait_impls::EnforcingSigner;
  25 use util::events::{Event, MessageSendEvent, MessageSendEventsProvider};
  26 use util::config::UserConfig;
  27 use util::ser::{Writeable, ReadableArgs};
  28 use util::test_utils;
  29
  30 use prelude::*;
  31 use core::default::Default;
  32
  33 use ln::functional_test_utils::*;
  34
  35 use bitcoin::blockdata::constants::genesis_block;
  36 use bitcoin::hash_types::BlockHash;
  37 use bitcoin::hashes::Hash;
  38 use bitcoin::hashes::sha256d::Hash as Sha256dHash;
  39 use bitcoin::network::constants::Network;
  40 use bitcoin::secp256k1::Secp256k1;
  41
  42 #[test]
  43 fn test_priv_forwarding_rejection() {
  44         // If we have a private channel with outbound liquidity, and
  45         // UserConfig::accept_forwards_to_priv_channels is set to false, we should reject any attempts
  46         // to forward through that channel.
  47         let chanmon_cfgs = create_chanmon_cfgs(3);
  48         let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
  49         let mut no_announce_cfg = test_default_channel_config();
  50         no_announce_cfg.accept_forwards_to_priv_channels = false;
  51         let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[None, Some(no_announce_cfg), None]);
  52         let persister: test_utils::TestPersister;
  53         let new_chain_monitor: test_utils::TestChainMonitor;
  54         let nodes_1_deserialized: ChannelManager<EnforcingSigner, &test_utils::TestChainMonitor, &test_utils::TestBroadcaster, &test_utils::TestKeysInterface, &test_utils::TestFeeEstimator, &test_utils::TestLogger>;
  55         let mut nodes = create_network(3, &node_cfgs, &node_chanmgrs);
  56
  57         let chan_id_1 = create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1_000_000, 500_000_000, InitFeatures::known(), InitFeatures::known()).2;
  58         let chan_id_2 = create_unannounced_chan_between_nodes_with_value(&nodes, 1, 2, 1_000_000, 500_000_000, InitFeatures::known(), InitFeatures::known()).0.channel_id;
  59
  60         // We should always be able to forward through nodes[1] as long as its out through a public
  61         // channel:
  62         send_payment(&nodes[2], &[&nodes[1], &nodes[0]], 10_000);
  63
  64         // ... however, if we send to nodes[2], we will have to pass the private channel from nodes[1]
  65         // to nodes[2], which should be rejected:
  66         let route_hint = RouteHint(vec![RouteHintHop {
  67                 src_node_id: nodes[1].node.get_our_node_id(),
  68                 short_channel_id: nodes[2].node.list_channels()[0].short_channel_id.unwrap(),
  69                 fees: RoutingFees { base_msat: 1000, proportional_millionths: 0 },
  70                 cltv_expiry_delta: MIN_CLTV_EXPIRY_DELTA,
  71                 htlc_minimum_msat: None,
  72                 htlc_maximum_msat: None,
  73         }]);
  74         let last_hops = vec![route_hint];
  75         let payment_params = PaymentParameters::from_node_id(nodes[2].node.get_our_node_id())
  76                 .with_features(InvoiceFeatures::known())
  77                 .with_route_hints(last_hops);
  78         let (route, our_payment_hash, our_payment_preimage, our_payment_secret) = get_route_and_payment_hash!(nodes[0], nodes[2], payment_params, 10_000, TEST_FINAL_CLTV);
  79
  80         nodes[0].node.send_payment(&route, our_payment_hash, &Some(our_payment_secret)).unwrap();
  81         check_added_monitors!(nodes[0], 1);
  82         let payment_event = SendEvent::from_event(nodes[0].node.get_and_clear_pending_msg_events().remove(0));
  83         nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &payment_event.msgs[0]);
  84         commitment_signed_dance!(nodes[1], nodes[0], payment_event.commitment_msg, false, true);
  85
  86         let htlc_fail_updates = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
  87         assert!(htlc_fail_updates.update_add_htlcs.is_empty());
  88         assert_eq!(htlc_fail_updates.update_fail_htlcs.len(), 1);
  89         assert!(htlc_fail_updates.update_fail_malformed_htlcs.is_empty());
  90         assert!(htlc_fail_updates.update_fee.is_none());
  91
  92         nodes[0].node.handle_update_fail_htlc(&nodes[1].node.get_our_node_id(), &htlc_fail_updates.update_fail_htlcs[0]);
  93         commitment_signed_dance!(nodes[0], nodes[1], htlc_fail_updates.commitment_signed, true, true);
  94         expect_payment_failed_with_update!(nodes[0], our_payment_hash, false, nodes[2].node.list_channels()[0].short_channel_id.unwrap(), true);
  95
  96         // Now disconnect nodes[1] from its peers and restart with accept_forwards_to_priv_channels set
  97         // to true. Sadly there is currently no way to change it at runtime.
  98
  99         nodes[0].node.peer_disconnected(&nodes[1].node.get_our_node_id(), false);
 100         nodes[2].node.peer_disconnected(&nodes[1].node.get_our_node_id(), false);
 101
 102         let nodes_1_serialized = nodes[1].node.encode();
 103         let mut monitor_a_serialized = test_utils::TestVecWriter(Vec::new());
 104         let mut monitor_b_serialized = test_utils::TestVecWriter(Vec::new());
 105         get_monitor!(nodes[1], chan_id_1).write(&mut monitor_a_serialized).unwrap();
 106         get_monitor!(nodes[1], chan_id_2).write(&mut monitor_b_serialized).unwrap();
 107
 108         persister = test_utils::TestPersister::new();
 109         let keys_manager = &chanmon_cfgs[1].keys_manager;
 110         new_chain_monitor = test_utils::TestChainMonitor::new(Some(nodes[1].chain_source), nodes[1].tx_broadcaster.clone(), nodes[1].logger, node_cfgs[1].fee_estimator, &persister, keys_manager);
 111         nodes[1].chain_monitor = &new_chain_monitor;
 112
 113         let mut monitor_a_read = &monitor_a_serialized.0[..];
 114         let mut monitor_b_read = &monitor_b_serialized.0[..];
 115         let (_, mut monitor_a) = <(BlockHash, ChannelMonitor<EnforcingSigner>)>::read(&mut monitor_a_read, keys_manager).unwrap();
 116         let (_, mut monitor_b) = <(BlockHash, ChannelMonitor<EnforcingSigner>)>::read(&mut monitor_b_read, keys_manager).unwrap();
 117         assert!(monitor_a_read.is_empty());
 118         assert!(monitor_b_read.is_empty());
 119
 120         no_announce_cfg.accept_forwards_to_priv_channels = true;
 121
 122         let mut nodes_1_read = &nodes_1_serialized[..];
 123         let (_, nodes_1_deserialized_tmp) = {
 124                 let mut channel_monitors = HashMap::new();
 125                 channel_monitors.insert(monitor_a.get_funding_txo().0, &mut monitor_a);
 126                 channel_monitors.insert(monitor_b.get_funding_txo().0, &mut monitor_b);
 127                 <(BlockHash, ChannelManager<EnforcingSigner, &test_utils::TestChainMonitor, &test_utils::TestBroadcaster, &test_utils::TestKeysInterface, &test_utils::TestFeeEstimator, &test_utils::TestLogger>)>::read(&mut nodes_1_read, ChannelManagerReadArgs {
 128                         default_config: no_announce_cfg,
 129                         keys_manager,
 130                         fee_estimator: node_cfgs[1].fee_estimator,
 131                         chain_monitor: nodes[1].chain_monitor,
 132                         tx_broadcaster: nodes[1].tx_broadcaster.clone(),
 133                         logger: nodes[1].logger,
 134                         channel_monitors,
 135                 }).unwrap()
 136         };
 137         assert!(nodes_1_read.is_empty());
 138         nodes_1_deserialized = nodes_1_deserialized_tmp;
 139
 140         assert!(nodes[1].chain_monitor.watch_channel(monitor_a.get_funding_txo().0, monitor_a).is_ok());
 141         assert!(nodes[1].chain_monitor.watch_channel(monitor_b.get_funding_txo().0, monitor_b).is_ok());
 142         check_added_monitors!(nodes[1], 2);
 143         nodes[1].node = &nodes_1_deserialized;
 144
 145         nodes[0].node.peer_connected(&nodes[1].node.get_our_node_id(), &msgs::Init { features: InitFeatures::known(), remote_network_address: None });
 146         nodes[1].node.peer_connected(&nodes[0].node.get_our_node_id(), &msgs::Init { features: InitFeatures::empty(), remote_network_address: None });
 147         let as_reestablish = get_event_msg!(nodes[0], MessageSendEvent::SendChannelReestablish, nodes[1].node.get_our_node_id());
 148         let bs_reestablish = get_event_msg!(nodes[1], MessageSendEvent::SendChannelReestablish, nodes[0].node.get_our_node_id());
 149         nodes[1].node.handle_channel_reestablish(&nodes[0].node.get_our_node_id(), &as_reestablish);
 150         nodes[0].node.handle_channel_reestablish(&nodes[1].node.get_our_node_id(), &bs_reestablish);
 151         get_event_msg!(nodes[0], MessageSendEvent::SendChannelUpdate, nodes[1].node.get_our_node_id());
 152         get_event_msg!(nodes[1], MessageSendEvent::SendChannelUpdate, nodes[0].node.get_our_node_id());
 153
 154         nodes[1].node.peer_connected(&nodes[2].node.get_our_node_id(), &msgs::Init { features: InitFeatures::known(), remote_network_address: None });
 155         nodes[2].node.peer_connected(&nodes[1].node.get_our_node_id(), &msgs::Init { features: InitFeatures::empty(), remote_network_address: None });
 156         let bs_reestablish = get_event_msg!(nodes[1], MessageSendEvent::SendChannelReestablish, nodes[2].node.get_our_node_id());
 157         let cs_reestablish = get_event_msg!(nodes[2], MessageSendEvent::SendChannelReestablish, nodes[1].node.get_our_node_id());
 158         nodes[2].node.handle_channel_reestablish(&nodes[1].node.get_our_node_id(), &bs_reestablish);
 159         nodes[1].node.handle_channel_reestablish(&nodes[2].node.get_our_node_id(), &cs_reestablish);
 160         get_event_msg!(nodes[1], MessageSendEvent::SendChannelUpdate, nodes[2].node.get_our_node_id());
 161         get_event_msg!(nodes[2], MessageSendEvent::SendChannelUpdate, nodes[1].node.get_our_node_id());
 162
 163         nodes[0].node.send_payment(&route, our_payment_hash, &Some(our_payment_secret)).unwrap();
 164         check_added_monitors!(nodes[0], 1);
 165         pass_along_route(&nodes[0], &[&[&nodes[1], &nodes[2]]], 10_000, our_payment_hash, our_payment_secret);
 166         claim_payment(&nodes[0], &[&nodes[1], &nodes[2]], our_payment_preimage);
 167 }
 168
 169 fn do_test_1_conf_open(connect_style: ConnectStyle) {
 170         // Previously, if the minium_depth config was set to 1, we'd never send a funding_locked. This
 171         // tests that we properly send one in that case.
 172         let mut alice_config = UserConfig::default();
 173         alice_config.own_channel_config.minimum_depth = 1;
 174         alice_config.channel_options.announced_channel = true;
 175         alice_config.peer_channel_config_limits.force_announced_channel_preference = false;
 176         let mut bob_config = UserConfig::default();
 177         bob_config.own_channel_config.minimum_depth = 1;
 178         bob_config.channel_options.announced_channel = true;
 179         bob_config.peer_channel_config_limits.force_announced_channel_preference = false;
 180         let chanmon_cfgs = create_chanmon_cfgs(2);
 181         let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
 182         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[Some(alice_config), Some(bob_config)]);
 183         let mut nodes = create_network(2, &node_cfgs, &node_chanmgrs);
 184         *nodes[0].connect_style.borrow_mut() = connect_style;
 185
 186         let tx = create_chan_between_nodes_with_value_init(&nodes[0], &nodes[1], 100000, 10001, InitFeatures::known(), InitFeatures::known());
 187         mine_transaction(&nodes[1], &tx);
 188         nodes[0].node.handle_funding_locked(&nodes[1].node.get_our_node_id(), &get_event_msg!(nodes[1], MessageSendEvent::SendFundingLocked, nodes[0].node.get_our_node_id()));
 189         assert!(nodes[0].node.get_and_clear_pending_msg_events().is_empty());
 190
 191         mine_transaction(&nodes[0], &tx);
 192         let as_msg_events = nodes[0].node.get_and_clear_pending_msg_events();
 193         assert_eq!(as_msg_events.len(), 2);
 194         let as_funding_locked = if let MessageSendEvent::SendFundingLocked { ref node_id, ref msg } = as_msg_events[0] {
 195                 assert_eq!(*node_id, nodes[1].node.get_our_node_id());
 196                 msg.clone()
 197         } else { panic!("Unexpected event"); };
 198         if let MessageSendEvent::SendChannelUpdate { ref node_id, msg: _ } = as_msg_events[1] {
 199                 assert_eq!(*node_id, nodes[1].node.get_our_node_id());
 200         } else { panic!("Unexpected event"); }
 201
 202         nodes[1].node.handle_funding_locked(&nodes[0].node.get_our_node_id(), &as_funding_locked);
 203         let bs_msg_events = nodes[1].node.get_and_clear_pending_msg_events();
 204         assert_eq!(bs_msg_events.len(), 1);
 205         if let MessageSendEvent::SendChannelUpdate { ref node_id, msg: _ } = bs_msg_events[0] {
 206                 assert_eq!(*node_id, nodes[0].node.get_our_node_id());
 207         } else { panic!("Unexpected event"); }
 208
 209         send_payment(&nodes[0], &[&nodes[1]], 100_000);
 210
 211         // After 6 confirmations, as required by the spec, we'll send announcement_signatures and
 212         // broadcast the channel_announcement (but not before exactly 6 confirmations).
 213         connect_blocks(&nodes[0], 4);
 214         assert!(nodes[0].node.get_and_clear_pending_msg_events().is_empty());
 215         connect_blocks(&nodes[0], 1);
 216         nodes[1].node.handle_announcement_signatures(&nodes[0].node.get_our_node_id(), &get_event_msg!(nodes[0], MessageSendEvent::SendAnnouncementSignatures, nodes[1].node.get_our_node_id()));
 217         assert!(nodes[1].node.get_and_clear_pending_msg_events().is_empty());
 218
 219         connect_blocks(&nodes[1], 5);
 220         let bs_announce_events = nodes[1].node.get_and_clear_pending_msg_events();
 221         assert_eq!(bs_announce_events.len(), 2);
 222         let bs_announcement_sigs = if let MessageSendEvent::SendAnnouncementSignatures { ref node_id, ref msg } = bs_announce_events[0] {
 223                 assert_eq!(*node_id, nodes[0].node.get_our_node_id());
 224                 msg.clone()
 225         } else { panic!("Unexpected event"); };
 226         let (bs_announcement, bs_update) = if let MessageSendEvent::BroadcastChannelAnnouncement { ref msg, ref update_msg } = bs_announce_events[1] {
 227                 (msg.clone(), update_msg.clone())
 228         } else { panic!("Unexpected event"); };
 229
 230         nodes[0].node.handle_announcement_signatures(&nodes[1].node.get_our_node_id(), &bs_announcement_sigs);
 231         let as_announce_events = nodes[0].node.get_and_clear_pending_msg_events();
 232         assert_eq!(as_announce_events.len(), 1);
 233         let (announcement, as_update) = if let MessageSendEvent::BroadcastChannelAnnouncement { ref msg, ref update_msg } = as_announce_events[0] {
 234                 (msg.clone(), update_msg.clone())
 235         } else { panic!("Unexpected event"); };
 236         assert_eq!(announcement, bs_announcement);
 237
 238         for node in nodes {
 239                 assert!(node.net_graph_msg_handler.handle_channel_announcement(&announcement).unwrap());
 240                 node.net_graph_msg_handler.handle_channel_update(&as_update).unwrap();
 241                 node.net_graph_msg_handler.handle_channel_update(&bs_update).unwrap();
 242         }
 243 }
 244 #[test]
 245 fn test_1_conf_open() {
 246         do_test_1_conf_open(ConnectStyle::BestBlockFirst);
 247         do_test_1_conf_open(ConnectStyle::TransactionsFirst);
 248         do_test_1_conf_open(ConnectStyle::FullBlockViaListen);
 249 }
 250
 251 #[test]
 252 fn test_routed_scid_alias() {
 253         // Trivially test sending a payment which is routed through an SCID alias.
 254         let chanmon_cfgs = create_chanmon_cfgs(3);
 255         let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
 256         let mut no_announce_cfg = test_default_channel_config();
 257         no_announce_cfg.accept_forwards_to_priv_channels = true;
 258         let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[None, Some(no_announce_cfg), None]);
 259         let mut nodes = create_network(3, &node_cfgs, &node_chanmgrs);
 260
 261         create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1_000_000, 500_000_000, InitFeatures::known(), InitFeatures::known()).2;
 262         let mut as_funding_locked = create_unannounced_chan_between_nodes_with_value(&nodes, 1, 2, 1_000_000, 500_000_000, InitFeatures::known(), InitFeatures::known()).0;
 263
 264         let last_hop = nodes[2].node.list_usable_channels();
 265         let hop_hints = vec![RouteHint(vec![RouteHintHop {
 266                 src_node_id: nodes[1].node.get_our_node_id(),
 267                 short_channel_id: last_hop[0].inbound_scid_alias.unwrap(),
 268                 fees: RoutingFees {
 269                         base_msat: last_hop[0].counterparty.forwarding_info.as_ref().unwrap().fee_base_msat,
 270                         proportional_millionths: last_hop[0].counterparty.forwarding_info.as_ref().unwrap().fee_proportional_millionths,
 271                 },
 272                 cltv_expiry_delta: last_hop[0].counterparty.forwarding_info.as_ref().unwrap().cltv_expiry_delta,
 273                 htlc_maximum_msat: None,
 274                 htlc_minimum_msat: None,
 275         }])];
 276         let payment_params = PaymentParameters::from_node_id(nodes[2].node.get_our_node_id())
 277                 .with_features(InvoiceFeatures::known())
 278                 .with_route_hints(hop_hints);
 279         let (route, payment_hash, payment_preimage, payment_secret) = get_route_and_payment_hash!(nodes[0], nodes[2], payment_params, 100_000, 42);
 280         assert_eq!(route.paths[0][1].short_channel_id, last_hop[0].inbound_scid_alias.unwrap());
 281         nodes[0].node.send_payment(&route, payment_hash, &Some(payment_secret)).unwrap();
 282         check_added_monitors!(nodes[0], 1);
 283
 284         pass_along_route(&nodes[0], &[&[&nodes[1], &nodes[2]]], 100_000, payment_hash, payment_secret);
 285         claim_payment(&nodes[0], &[&nodes[1], &nodes[2]], payment_preimage);
 286
 287         // Now test that if a peer sends us a second funding_locked after the channel is operational we
 288         // will use the new alias.
 289         as_funding_locked.short_channel_id_alias = Some(0xdeadbeef);
 290         nodes[2].node.handle_funding_locked(&nodes[1].node.get_our_node_id(), &as_funding_locked);
 291         // Note that we always respond to a funding_locked with a channel_update. Not a lot of reason
 292         // to bother updating that code, so just drop the message here.
 293         get_event_msg!(nodes[2], MessageSendEvent::SendChannelUpdate, nodes[1].node.get_our_node_id());
 294         let updated_channel_info = nodes[2].node.list_usable_channels();
 295         assert_eq!(updated_channel_info.len(), 1);
 296         assert_eq!(updated_channel_info[0].inbound_scid_alias.unwrap(), 0xdeadbeef);
 297         // Note that because we never send a duplicate funding_locked we can't send a payment through
 298         // the 0xdeadbeef SCID alias.
 299 }
 300
 301 #[test]
 302 fn test_scid_privacy_on_pub_channel() {
 303         // Tests rejecting the scid_privacy feature for public channels and that we don't ever try to
 304         // send them.
 305         let chanmon_cfgs = create_chanmon_cfgs(2);
 306         let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
 307         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
 308         let mut nodes = create_network(2, &node_cfgs, &node_chanmgrs);
 309
 310         let mut scid_privacy_cfg = test_default_channel_config();
 311         scid_privacy_cfg.channel_options.announced_channel = true;
 312         scid_privacy_cfg.own_channel_config.negotiate_scid_privacy = true;
 313         nodes[0].node.create_channel(nodes[1].node.get_our_node_id(), 100000, 10001, 42, Some(scid_privacy_cfg)).unwrap();
 314         let mut open_channel = get_event_msg!(nodes[0], MessageSendEvent::SendOpenChannel, nodes[1].node.get_our_node_id());
 315
 316         assert!(!open_channel.channel_type.as_ref().unwrap().supports_scid_privacy()); // we ignore `negotiate_scid_privacy` on pub channels
 317         open_channel.channel_type.as_mut().unwrap().set_scid_privacy_required();
 318         assert_eq!(open_channel.channel_flags & 1, 1); // The `announce_channel` bit is set.
 319
 320         nodes[1].node.handle_open_channel(&nodes[0].node.get_our_node_id(), InitFeatures::known(), &open_channel);
 321         let err = get_err_msg!(nodes[1], nodes[0].node.get_our_node_id());
 322         assert_eq!(err.data, "SCID Alias/Privacy Channel Type cannot be set on a public channel");
 323 }
 324
 325 #[test]
 326 fn test_scid_privacy_negotiation() {
 327         // Tests of the negotiation of SCID alias and falling back to non-SCID-alias if our
 328         // counterparty doesn't support it.
 329         let chanmon_cfgs = create_chanmon_cfgs(2);
 330         let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
 331         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
 332         let mut nodes = create_network(2, &node_cfgs, &node_chanmgrs);
 333
 334         let mut scid_privacy_cfg = test_default_channel_config();
 335         scid_privacy_cfg.channel_options.announced_channel = false;
 336         scid_privacy_cfg.own_channel_config.negotiate_scid_privacy = true;
 337         nodes[0].node.create_channel(nodes[1].node.get_our_node_id(), 100000, 10001, 42, Some(scid_privacy_cfg)).unwrap();
 338
 339         let init_open_channel = get_event_msg!(nodes[0], MessageSendEvent::SendOpenChannel, nodes[1].node.get_our_node_id());
 340         assert!(init_open_channel.channel_type.as_ref().unwrap().supports_scid_privacy());
 341         assert!(nodes[0].node.list_channels()[0].channel_type.is_none()); // channel_type is none until counterparty accepts
 342
 343         // now simulate nodes[1] responding with an Error message, indicating it doesn't understand
 344         // SCID alias.
 345         nodes[0].node.handle_error(&nodes[1].node.get_our_node_id(), &msgs::ErrorMessage {
 346                 channel_id: init_open_channel.temporary_channel_id,
 347                 data: "Yo, no SCID aliases, no privacy here!".to_string()
 348         });
 349         assert!(nodes[0].node.list_channels()[0].channel_type.is_none()); // channel_type is none until counterparty accepts
 350
 351         let second_open_channel = get_event_msg!(nodes[0], MessageSendEvent::SendOpenChannel, nodes[1].node.get_our_node_id());
 352         assert!(!second_open_channel.channel_type.as_ref().unwrap().supports_scid_privacy());
 353         nodes[1].node.handle_open_channel(&nodes[0].node.get_our_node_id(), InitFeatures::known(), &second_open_channel);
 354         nodes[0].node.handle_accept_channel(&nodes[1].node.get_our_node_id(), InitFeatures::known(), &get_event_msg!(nodes[1], MessageSendEvent::SendAcceptChannel, nodes[0].node.get_our_node_id()));
 355
 356         let events = nodes[0].node.get_and_clear_pending_events();
 357         assert_eq!(events.len(), 1);
 358         match events[0] {
 359                 Event::FundingGenerationReady { .. } => {},
 360                 _ => panic!("Unexpected event"),
 361         }
 362
 363         assert!(!nodes[0].node.list_channels()[0].channel_type.as_ref().unwrap().supports_scid_privacy());
 364         assert!(!nodes[1].node.list_channels()[0].channel_type.as_ref().unwrap().supports_scid_privacy());
 365 }
 366
 367 #[test]
 368 fn test_inbound_scid_privacy() {
 369         // Tests accepting channels with the scid_privacy feature and rejecting forwards using the
 370         // channel's real SCID as required by the channel feature.
 371         let chanmon_cfgs = create_chanmon_cfgs(3);
 372         let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
 373         let mut accept_forward_cfg = test_default_channel_config();
 374         accept_forward_cfg.accept_forwards_to_priv_channels = true;
 375         let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[None, Some(accept_forward_cfg), None]);
 376         let mut nodes = create_network(3, &node_cfgs, &node_chanmgrs);
 377
 378         create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1_000_000, 0, InitFeatures::known(), InitFeatures::known());
 379
 380         let mut no_announce_cfg = test_default_channel_config();
 381         no_announce_cfg.channel_options.announced_channel = false;
 382         no_announce_cfg.own_channel_config.negotiate_scid_privacy = true;
 383         nodes[1].node.create_channel(nodes[2].node.get_our_node_id(), 100_000, 10_000, 42, Some(no_announce_cfg)).unwrap();
 384         let mut open_channel = get_event_msg!(nodes[1], MessageSendEvent::SendOpenChannel, nodes[2].node.get_our_node_id());
 385
 386         assert!(open_channel.channel_type.as_ref().unwrap().requires_scid_privacy());
 387
 388         nodes[2].node.handle_open_channel(&nodes[1].node.get_our_node_id(), InitFeatures::known(), &open_channel);
 389         let accept_channel = get_event_msg!(nodes[2], MessageSendEvent::SendAcceptChannel, nodes[1].node.get_our_node_id());
 390         nodes[1].node.handle_accept_channel(&nodes[2].node.get_our_node_id(), InitFeatures::known(), &accept_channel);
 391
 392         let (temporary_channel_id, tx, _) = create_funding_transaction(&nodes[1], &nodes[2].node.get_our_node_id(), 100_000, 42);
 393         nodes[1].node.funding_transaction_generated(&temporary_channel_id, &nodes[2].node.get_our_node_id(), tx.clone()).unwrap();
 394         nodes[2].node.handle_funding_created(&nodes[1].node.get_our_node_id(), &get_event_msg!(nodes[1], MessageSendEvent::SendFundingCreated, nodes[2].node.get_our_node_id()));
 395         check_added_monitors!(nodes[2], 1);
 396
 397         let cs_funding_signed = get_event_msg!(nodes[2], MessageSendEvent::SendFundingSigned, nodes[1].node.get_our_node_id());
 398         nodes[1].node.handle_funding_signed(&nodes[2].node.get_our_node_id(), &cs_funding_signed);
 399         check_added_monitors!(nodes[1], 1);
 400
 401         let conf_height = core::cmp::max(nodes[1].best_block_info().1 + 1, nodes[2].best_block_info().1 + 1);
 402         confirm_transaction_at(&nodes[1], &tx, conf_height);
 403         connect_blocks(&nodes[1], CHAN_CONFIRM_DEPTH - 1);
 404         confirm_transaction_at(&nodes[2], &tx, conf_height);
 405         connect_blocks(&nodes[2], CHAN_CONFIRM_DEPTH - 1);
 406         let bs_funding_locked = get_event_msg!(nodes[1], MessageSendEvent::SendFundingLocked, nodes[2].node.get_our_node_id());
 407         nodes[1].node.handle_funding_locked(&nodes[2].node.get_our_node_id(), &get_event_msg!(nodes[2], MessageSendEvent::SendFundingLocked, nodes[1].node.get_our_node_id()));
 408         let bs_update = get_event_msg!(nodes[1], MessageSendEvent::SendChannelUpdate, nodes[2].node.get_our_node_id());
 409         nodes[2].node.handle_funding_locked(&nodes[1].node.get_our_node_id(), &bs_funding_locked);
 410         let cs_update = get_event_msg!(nodes[2], MessageSendEvent::SendChannelUpdate, nodes[1].node.get_our_node_id());
 411
 412         nodes[1].node.handle_channel_update(&nodes[2].node.get_our_node_id(), &cs_update);
 413         nodes[2].node.handle_channel_update(&nodes[1].node.get_our_node_id(), &bs_update);
 414
 415         // Now we can pay just fine using the SCID alias nodes[2] gave to nodes[1]...
 416
 417         let last_hop = nodes[2].node.list_usable_channels();
 418         let mut hop_hints = vec![RouteHint(vec![RouteHintHop {
 419                 src_node_id: nodes[1].node.get_our_node_id(),
 420                 short_channel_id: last_hop[0].inbound_scid_alias.unwrap(),
 421                 fees: RoutingFees {
 422                         base_msat: last_hop[0].counterparty.forwarding_info.as_ref().unwrap().fee_base_msat,
 423                         proportional_millionths: last_hop[0].counterparty.forwarding_info.as_ref().unwrap().fee_proportional_millionths,
 424                 },
 425                 cltv_expiry_delta: last_hop[0].counterparty.forwarding_info.as_ref().unwrap().cltv_expiry_delta,
 426                 htlc_maximum_msat: None,
 427                 htlc_minimum_msat: None,
 428         }])];
 429         let payment_params = PaymentParameters::from_node_id(nodes[2].node.get_our_node_id())
 430                 .with_features(InvoiceFeatures::known())
 431                 .with_route_hints(hop_hints.clone());
 432         let (route, payment_hash, payment_preimage, payment_secret) = get_route_and_payment_hash!(nodes[0], nodes[2], payment_params, 100_000, 42);
 433         assert_eq!(route.paths[0][1].short_channel_id, last_hop[0].inbound_scid_alias.unwrap());
 434         nodes[0].node.send_payment(&route, payment_hash, &Some(payment_secret)).unwrap();
 435         check_added_monitors!(nodes[0], 1);
 436
 437         pass_along_route(&nodes[0], &[&[&nodes[1], &nodes[2]]], 100_000, payment_hash, payment_secret);
 438         claim_payment(&nodes[0], &[&nodes[1], &nodes[2]], payment_preimage);
 439
 440         // ... but if we try to pay using the real SCID, nodes[1] will just tell us they don't know
 441         // what channel we're talking about.
 442         hop_hints[0].0[0].short_channel_id = last_hop[0].short_channel_id.unwrap();
 443
 444         let payment_params_2 = PaymentParameters::from_node_id(nodes[2].node.get_our_node_id())
 445                 .with_features(InvoiceFeatures::known())
 446                 .with_route_hints(hop_hints);
 447         let (route_2, payment_hash_2, _, payment_secret_2) = get_route_and_payment_hash!(nodes[0], nodes[2], payment_params_2, 100_000, 42);
 448         assert_eq!(route_2.paths[0][1].short_channel_id, last_hop[0].short_channel_id.unwrap());
 449         nodes[0].node.send_payment(&route_2, payment_hash_2, &Some(payment_secret_2)).unwrap();
 450         check_added_monitors!(nodes[0], 1);
 451
 452         let payment_event = SendEvent::from_node(&nodes[0]);
 453         assert_eq!(nodes[1].node.get_our_node_id(), payment_event.node_id);
 454         nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &payment_event.msgs[0]);
 455         commitment_signed_dance!(nodes[1], nodes[0], payment_event.commitment_msg, true, true);
 456
 457         nodes[1].logger.assert_log_regex("lightning::ln::channelmanager".to_string(), regex::Regex::new(r"Refusing to forward over real channel SCID as our counterparty requested").unwrap(), 1);
 458
 459         let mut updates = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
 460         nodes[0].node.handle_update_fail_htlc(&nodes[1].node.get_our_node_id(), &updates.update_fail_htlcs[0]);
 461         commitment_signed_dance!(nodes[0], nodes[1], updates.commitment_signed, false);
 462
 463         expect_payment_failed_conditions!(nodes[0], payment_hash_2, false,
 464                 PaymentFailedConditions::new().blamed_scid(last_hop[0].short_channel_id.unwrap())
 465                         .blamed_chan_closed(true).expected_htlc_error_data(0x4000|10, &[0; 0]));
 466 }
 467
 468 #[test]
 469 fn test_scid_alias_returned() {
 470         // Tests that when we fail an HTLC (in this case due to attempting to forward more than the
 471         // channel's available balance) we use the correct (in this case the aliased) SCID in the
 472         // channel_update which is returned in the onion to the sender.
 473         let chanmon_cfgs = create_chanmon_cfgs(3);
 474         let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
 475         let mut accept_forward_cfg = test_default_channel_config();
 476         accept_forward_cfg.accept_forwards_to_priv_channels = true;
 477         let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[None, Some(accept_forward_cfg), None]);
 478         let nodes = create_network(3, &node_cfgs, &node_chanmgrs);
 479
 480         create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 10_000_000, 0, InitFeatures::known(), InitFeatures::known());
 481         create_unannounced_chan_between_nodes_with_value(&nodes, 1, 2, 10_000, 0, InitFeatures::known(), InitFeatures::known());
 482
 483         let last_hop = nodes[2].node.list_usable_channels();
 484         let mut hop_hints = vec![RouteHint(vec![RouteHintHop {
 485                 src_node_id: nodes[1].node.get_our_node_id(),
 486                 short_channel_id: last_hop[0].inbound_scid_alias.unwrap(),
 487                 fees: RoutingFees {
 488                         base_msat: last_hop[0].counterparty.forwarding_info.as_ref().unwrap().fee_base_msat,
 489                         proportional_millionths: last_hop[0].counterparty.forwarding_info.as_ref().unwrap().fee_proportional_millionths,
 490                 },
 491                 cltv_expiry_delta: last_hop[0].counterparty.forwarding_info.as_ref().unwrap().cltv_expiry_delta,
 492                 htlc_maximum_msat: None,
 493                 htlc_minimum_msat: None,
 494         }])];
 495         let payment_params = PaymentParameters::from_node_id(nodes[2].node.get_our_node_id())
 496                 .with_features(InvoiceFeatures::known())
 497                 .with_route_hints(hop_hints);
 498         let (mut route, payment_hash, _, payment_secret) = get_route_and_payment_hash!(nodes[0], nodes[2], payment_params, 10_000, 42);
 499         assert_eq!(route.paths[0][1].short_channel_id, nodes[2].node.list_usable_channels()[0].inbound_scid_alias.unwrap());
 500
 501         route.paths[0][1].fee_msat = 10_000_000; // Overshoot the last channel's value
 502
 503         // Route the HTLC through to the destination.
 504         nodes[0].node.send_payment(&route, payment_hash, &Some(payment_secret)).unwrap();
 505         check_added_monitors!(nodes[0], 1);
 506         let as_updates = get_htlc_update_msgs!(nodes[0], nodes[1].node.get_our_node_id());
 507         nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &as_updates.update_add_htlcs[0]);
 508         commitment_signed_dance!(nodes[1], nodes[0], &as_updates.commitment_signed, false, true);
 509
 510         expect_pending_htlcs_forwardable!(nodes[1]);
 511         expect_pending_htlcs_forwardable!(nodes[1]);
 512         check_added_monitors!(nodes[1], 1);
 513
 514         let bs_updates = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
 515         nodes[0].node.handle_update_fail_htlc(&nodes[1].node.get_our_node_id(), &bs_updates.update_fail_htlcs[0]);
 516         commitment_signed_dance!(nodes[0], nodes[1], bs_updates.commitment_signed, false, true);
 517
 518         // Build the expected channel update
 519         let contents = msgs::UnsignedChannelUpdate {
 520                 chain_hash: genesis_block(Network::Testnet).header.block_hash(),
 521                 short_channel_id: last_hop[0].inbound_scid_alias.unwrap(),
 522                 timestamp: 21,
 523                 flags: 1,
 524                 cltv_expiry_delta: accept_forward_cfg.channel_options.cltv_expiry_delta,
 525                 htlc_minimum_msat: 1_000,
 526                 htlc_maximum_msat: OptionalField::Present(1_000_000), // Defaults to 10% of the channel value
 527                 fee_base_msat: last_hop[0].counterparty.forwarding_info.as_ref().unwrap().fee_base_msat,
 528                 fee_proportional_millionths: last_hop[0].counterparty.forwarding_info.as_ref().unwrap().fee_proportional_millionths,
 529                 excess_data: Vec::new(),
 530         };
 531         let msg_hash = Sha256dHash::hash(&contents.encode()[..]);
 532         let signature = Secp256k1::new().sign_ecdsa(&hash_to_message!(&msg_hash[..]), &nodes[1].keys_manager.get_node_secret(Recipient::Node).unwrap());
 533         let msg = msgs::ChannelUpdate { signature, contents };
 534
 535         let mut err_data = Vec::new();
 536         err_data.extend_from_slice(&(msg.serialized_length() as u16 + 2).to_be_bytes());
 537         err_data.extend_from_slice(&ChannelUpdate::TYPE.to_be_bytes());
 538         err_data.extend_from_slice(&msg.encode());
 539
 540         expect_payment_failed_conditions!(nodes[0], payment_hash, false,
 541                 PaymentFailedConditions::new().blamed_scid(last_hop[0].inbound_scid_alias.unwrap())
 542                         .blamed_chan_closed(false).expected_htlc_error_data(0x1000|7, &err_data));
 543
 544         route.paths[0][1].fee_msat = 10_000; // Reset to the correct payment amount
 545         route.paths[0][0].fee_msat = 0; // But set fee paid to the middle hop to 0
 546
 547         // Route the HTLC through to the destination.
 548         nodes[0].node.send_payment(&route, payment_hash, &Some(payment_secret)).unwrap();
 549         check_added_monitors!(nodes[0], 1);
 550         let as_updates = get_htlc_update_msgs!(nodes[0], nodes[1].node.get_our_node_id());
 551         nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &as_updates.update_add_htlcs[0]);
 552         commitment_signed_dance!(nodes[1], nodes[0], &as_updates.commitment_signed, false, true);
 553
 554         let bs_updates = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
 555         nodes[0].node.handle_update_fail_htlc(&nodes[1].node.get_our_node_id(), &bs_updates.update_fail_htlcs[0]);
 556         commitment_signed_dance!(nodes[0], nodes[1], bs_updates.commitment_signed, false, true);
 557
 558         let mut err_data = Vec::new();
 559         err_data.extend_from_slice(&10_000u64.to_be_bytes());
 560         err_data.extend_from_slice(&(msg.serialized_length() as u16 + 2).to_be_bytes());
 561         err_data.extend_from_slice(&ChannelUpdate::TYPE.to_be_bytes());
 562         err_data.extend_from_slice(&msg.encode());
 563         expect_payment_failed_conditions!(nodes[0], payment_hash, false,
 564                 PaymentFailedConditions::new().blamed_scid(last_hop[0].inbound_scid_alias.unwrap())
 565                         .blamed_chan_closed(false).expected_htlc_error_data(0x1000|12, &err_data));
 566 }
 567
 568 #[test]
 569 fn test_simple_0conf_channel() {
 570         // If our peer tells us they will accept our channel with 0 confs, and we funded the channel,
 571         // we should trust the funding won't be double-spent (assuming `trust_own_funding_0conf` is
 572         // set)!
 573         // Further, if we `accept_inbound_channel_from_trusted_peer_0conf`, funding locked messages
 574         // should fly immediately and the channel should be available for use as soon as they are
 575         // received.
 576
 577         let chanmon_cfgs = create_chanmon_cfgs(2);
 578         let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
 579         let mut chan_config = test_default_channel_config();
 580         chan_config.manually_accept_inbound_channels = true;
 581
 582         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, Some(chan_config)]);
 583         let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
 584
 585         nodes[0].node.create_channel(nodes[1].node.get_our_node_id(), 100000, 10001, 42, None).unwrap();
 586         let open_channel = get_event_msg!(nodes[0], MessageSendEvent::SendOpenChannel, nodes[1].node.get_our_node_id());
 587
 588         nodes[1].node.handle_open_channel(&nodes[0].node.get_our_node_id(), InitFeatures::known(), &open_channel);
 589         let events = nodes[1].node.get_and_clear_pending_events();
 590         assert_eq!(events.len(), 1);
 591         match events[0] {
 592                 Event::OpenChannelRequest { temporary_channel_id, .. } => {
 593                         nodes[1].node.accept_inbound_channel_from_trusted_peer_0conf(&temporary_channel_id, &nodes[0].node.get_our_node_id(), 0).unwrap();
 594                 },
 595                 _ => panic!("Unexpected event"),
 596         };
 597
 598         let mut accept_channel = get_event_msg!(nodes[1], MessageSendEvent::SendAcceptChannel, nodes[0].node.get_our_node_id());
 599         assert_eq!(accept_channel.minimum_depth, 0);
 600         nodes[0].node.handle_accept_channel(&nodes[1].node.get_our_node_id(), InitFeatures::known(), &accept_channel);
 601
 602         let (temporary_channel_id, tx, _) = create_funding_transaction(&nodes[0], &nodes[1].node.get_our_node_id(), 100000, 42);
 603         nodes[0].node.funding_transaction_generated(&temporary_channel_id, &nodes[1].node.get_our_node_id(), tx.clone()).unwrap();
 604         let funding_created = get_event_msg!(nodes[0], MessageSendEvent::SendFundingCreated, nodes[1].node.get_our_node_id());
 605
 606         nodes[1].node.handle_funding_created(&nodes[0].node.get_our_node_id(), &funding_created);
 607         check_added_monitors!(nodes[1], 1);
 608         let bs_signed_locked = nodes[1].node.get_and_clear_pending_msg_events();
 609         assert_eq!(bs_signed_locked.len(), 2);
 610         let as_funding_locked;
 611         match &bs_signed_locked[0] {
 612                 MessageSendEvent::SendFundingSigned { node_id, msg } => {
 613                         assert_eq!(*node_id, nodes[0].node.get_our_node_id());
 614                         nodes[0].node.handle_funding_signed(&nodes[1].node.get_our_node_id(), &msg);
 615                         check_added_monitors!(nodes[0], 1);
 616
 617                         assert_eq!(nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().len(), 1);
 618                         assert_eq!(nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0)[0], tx);
 619
 620                         as_funding_locked = get_event_msg!(nodes[0], MessageSendEvent::SendFundingLocked, nodes[1].node.get_our_node_id());
 621                 }
 622                 _ => panic!("Unexpected event"),
 623         }
 624         match &bs_signed_locked[1] {
 625                 MessageSendEvent::SendFundingLocked { node_id, msg } => {
 626                         assert_eq!(*node_id, nodes[0].node.get_our_node_id());
 627                         nodes[0].node.handle_funding_locked(&nodes[1].node.get_our_node_id(), &msg);
 628                 }
 629                 _ => panic!("Unexpected event"),
 630         }
 631
 632         nodes[1].node.handle_funding_locked(&nodes[0].node.get_our_node_id(), &as_funding_locked);
 633
 634         let as_channel_update = get_event_msg!(nodes[0], MessageSendEvent::SendChannelUpdate, nodes[1].node.get_our_node_id());
 635         let bs_channel_update = get_event_msg!(nodes[1], MessageSendEvent::SendChannelUpdate, nodes[0].node.get_our_node_id());
 636
 637         nodes[0].node.handle_channel_update(&nodes[1].node.get_our_node_id(), &bs_channel_update);
 638         nodes[1].node.handle_channel_update(&nodes[0].node.get_our_node_id(), &as_channel_update);
 639
 640         assert_eq!(nodes[0].node.list_usable_channels().len(), 1);
 641         assert_eq!(nodes[1].node.list_usable_channels().len(), 1);
 642
 643         send_payment(&nodes[0], &[&nodes[1]], 100_000);
 644 }
 645
 646 #[test]
 647 fn test_0conf_channel_with_async_monitor() {
 648         // Test that we properly send out funding_locked in (both inbound- and outbound-) zero-conf
 649         // channels if ChannelMonitor updates return a `TemporaryFailure` during the initial channel
 650         // negotiation.
 651
 652         let chanmon_cfgs = create_chanmon_cfgs(3);
 653         let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
 654         let mut chan_config = test_default_channel_config();
 655         chan_config.manually_accept_inbound_channels = true;
 656         let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[None, Some(chan_config), None]);
 657         let nodes = create_network(3, &node_cfgs, &node_chanmgrs);
 658
 659         create_announced_chan_between_nodes_with_value(&nodes, 1, 2, 1_000_000, 0, InitFeatures::known(), InitFeatures::known());
 660
 661         chan_config.channel_options.announced_channel = false;
 662         nodes[0].node.create_channel(nodes[1].node.get_our_node_id(), 100000, 10001, 42, Some(chan_config)).unwrap();
 663         let open_channel = get_event_msg!(nodes[0], MessageSendEvent::SendOpenChannel, nodes[1].node.get_our_node_id());
 664
 665         nodes[1].node.handle_open_channel(&nodes[0].node.get_our_node_id(), InitFeatures::known(), &open_channel);
 666         let events = nodes[1].node.get_and_clear_pending_events();
 667         assert_eq!(events.len(), 1);
 668         match events[0] {
 669                 Event::OpenChannelRequest { temporary_channel_id, .. } => {
 670                         nodes[1].node.accept_inbound_channel_from_trusted_peer_0conf(&temporary_channel_id, &nodes[0].node.get_our_node_id(), 0).unwrap();
 671                 },
 672                 _ => panic!("Unexpected event"),
 673         };
 674
 675         let mut accept_channel = get_event_msg!(nodes[1], MessageSendEvent::SendAcceptChannel, nodes[0].node.get_our_node_id());
 676         assert_eq!(accept_channel.minimum_depth, 0);
 677         nodes[0].node.handle_accept_channel(&nodes[1].node.get_our_node_id(), InitFeatures::known(), &accept_channel);
 678
 679         let (temporary_channel_id, tx, funding_output) = create_funding_transaction(&nodes[0], &nodes[1].node.get_our_node_id(), 100000, 42);
 680         nodes[0].node.funding_transaction_generated(&temporary_channel_id, &nodes[1].node.get_our_node_id(), tx.clone()).unwrap();
 681         let funding_created = get_event_msg!(nodes[0], MessageSendEvent::SendFundingCreated, nodes[1].node.get_our_node_id());
 682
 683         chanmon_cfgs[1].persister.set_update_ret(Err(ChannelMonitorUpdateErr::TemporaryFailure));
 684         nodes[1].node.handle_funding_created(&nodes[0].node.get_our_node_id(), &funding_created);
 685         check_added_monitors!(nodes[1], 1);
 686         assert!(nodes[1].node.get_and_clear_pending_events().is_empty());
 687
 688         let channel_id = funding_output.to_channel_id();
 689         nodes[1].chain_monitor.complete_sole_pending_chan_update(&channel_id);
 690
 691         let bs_signed_locked = nodes[1].node.get_and_clear_pending_msg_events();
 692         assert_eq!(bs_signed_locked.len(), 2);
 693         chanmon_cfgs[0].persister.set_update_ret(Err(ChannelMonitorUpdateErr::TemporaryFailure));
 694
 695         match &bs_signed_locked[0] {
 696                 MessageSendEvent::SendFundingSigned { node_id, msg } => {
 697                         assert_eq!(*node_id, nodes[0].node.get_our_node_id());
 698                         nodes[0].node.handle_funding_signed(&nodes[1].node.get_our_node_id(), &msg);
 699                         check_added_monitors!(nodes[0], 1);
 700                 }
 701                 _ => panic!("Unexpected event"),
 702         }
 703         match &bs_signed_locked[1] {
 704                 MessageSendEvent::SendFundingLocked { node_id, msg } => {
 705                         assert_eq!(*node_id, nodes[0].node.get_our_node_id());
 706                         nodes[0].node.handle_funding_locked(&nodes[1].node.get_our_node_id(), &msg);
 707                 }
 708                 _ => panic!("Unexpected event"),
 709         }
 710
 711         assert!(nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().is_empty());
 712
 713         assert!(nodes[0].node.get_and_clear_pending_msg_events().is_empty());
 714         nodes[0].chain_monitor.complete_sole_pending_chan_update(&channel_id);
 715         let as_locked_update = nodes[0].node.get_and_clear_pending_msg_events();
 716
 717         // Note that the funding transaction is actually released when
 718         // get_and_clear_pending_msg_events, above, checks for monitor events.
 719         assert_eq!(nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().len(), 1);
 720         assert_eq!(nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0)[0], tx);
 721
 722         match &as_locked_update[0] {
 723                 MessageSendEvent::SendFundingLocked { node_id, msg } => {
 724                         assert_eq!(*node_id, nodes[1].node.get_our_node_id());
 725                         nodes[1].node.handle_funding_locked(&nodes[0].node.get_our_node_id(), &msg);
 726                 }
 727                 _ => panic!("Unexpected event"),
 728         }
 729         let bs_channel_update = get_event_msg!(nodes[1], MessageSendEvent::SendChannelUpdate, nodes[0].node.get_our_node_id());
 730
 731         let as_channel_update = match &as_locked_update[1] {
 732                 MessageSendEvent::SendChannelUpdate { node_id, msg } => {
 733                         assert_eq!(*node_id, nodes[1].node.get_our_node_id());
 734                         msg.clone()
 735                 }
 736                 _ => panic!("Unexpected event"),
 737         };
 738
 739         chanmon_cfgs[0].persister.set_update_ret(Ok(()));
 740         chanmon_cfgs[1].persister.set_update_ret(Ok(()));
 741
 742         nodes[0].node.handle_channel_update(&nodes[1].node.get_our_node_id(), &bs_channel_update);
 743         nodes[1].node.handle_channel_update(&nodes[0].node.get_our_node_id(), &as_channel_update);
 744
 745         assert_eq!(nodes[0].node.list_usable_channels().len(), 1);
 746         assert_eq!(nodes[1].node.list_usable_channels().len(), 2);
 747
 748         send_payment(&nodes[0], &[&nodes[1]], 100_000);
 749
 750         // Now that we have useful channels, try sending a payment where the we hit a temporary monitor
 751         // failure before we've ever confirmed the funding transaction. This previously caused a panic.
 752         let (route, payment_hash, payment_preimage, payment_secret) = get_route_and_payment_hash!(nodes[0], nodes[2], 1_000_000);
 753
 754         nodes[0].node.send_payment(&route, payment_hash, &Some(payment_secret)).unwrap();
 755         check_added_monitors!(nodes[0], 1);
 756
 757         let as_send = SendEvent::from_node(&nodes[0]);
 758         nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &as_send.msgs[0]);
 759         nodes[1].node.handle_commitment_signed(&nodes[0].node.get_our_node_id(), &as_send.commitment_msg);
 760         check_added_monitors!(nodes[1], 1);
 761
 762         let (bs_raa, bs_commitment_signed) = get_revoke_commit_msgs!(nodes[1], nodes[0].node.get_our_node_id());
 763         nodes[0].node.handle_revoke_and_ack(&nodes[1].node.get_our_node_id(), &bs_raa);
 764         check_added_monitors!(nodes[0], 1);
 765
 766         nodes[0].node.handle_commitment_signed(&nodes[1].node.get_our_node_id(), &bs_commitment_signed);
 767         check_added_monitors!(nodes[0], 1);
 768
 769         chanmon_cfgs[1].persister.set_update_ret(Err(ChannelMonitorUpdateErr::TemporaryFailure));
 770         nodes[1].node.handle_revoke_and_ack(&nodes[0].node.get_our_node_id(), &get_event_msg!(nodes[0], MessageSendEvent::SendRevokeAndACK, nodes[1].node.get_our_node_id()));
 771         check_added_monitors!(nodes[1], 1);
 772         assert!(nodes[1].node.get_and_clear_pending_msg_events().is_empty());
 773
 774         chanmon_cfgs[1].persister.set_update_ret(Ok(()));
 775         let (outpoint, _, latest_update) = nodes[1].chain_monitor.latest_monitor_update_id.lock().unwrap().get(&bs_raa.channel_id).unwrap().clone();
 776         nodes[1].chain_monitor.chain_monitor.channel_monitor_updated(outpoint, latest_update).unwrap();
 777         check_added_monitors!(nodes[1], 0);
 778         expect_pending_htlcs_forwardable!(nodes[1]);
 779         check_added_monitors!(nodes[1], 1);
 780
 781         let bs_send = SendEvent::from_node(&nodes[1]);
 782         nodes[2].node.handle_update_add_htlc(&nodes[1].node.get_our_node_id(), &bs_send.msgs[0]);
 783         commitment_signed_dance!(nodes[2], nodes[1], bs_send.commitment_msg, false);
 784         expect_pending_htlcs_forwardable!(nodes[2]);
 785         expect_payment_received!(nodes[2], payment_hash, payment_secret, 1_000_000);
 786         claim_payment(&nodes[0], &[&nodes[1], &nodes[2]], payment_preimage);
 787
 788         confirm_transaction(&nodes[0], &tx);
 789         confirm_transaction(&nodes[1], &tx);
 790
 791         send_payment(&nodes[0], &[&nodes[1]], 100_000);
 792 }