_ Git - rust-lightning/blob - lightning/src/ln/reload_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 //! Functional tests which test for correct behavior across node restarts.
  11
  12 use crate::chain::{ChannelMonitorUpdateStatus, Watch};
  13 use crate::chain::chaininterface::LowerBoundedFeeEstimator;
  14 use crate::chain::channelmonitor::ChannelMonitor;
  15 use crate::sign::EntropySource;
  16 use crate::chain::transaction::OutPoint;
  17 use crate::events::{ClosureReason, Event, HTLCDestination, MessageSendEvent, MessageSendEventsProvider};
  18 use crate::ln::channelmanager::{ChannelManager, ChannelManagerReadArgs, PaymentId, RecipientOnionFields};
  19 use crate::ln::msgs;
  20 use crate::ln::msgs::{ChannelMessageHandler, RoutingMessageHandler, ErrorAction};
  21 use crate::util::enforcing_trait_impls::EnforcingSigner;
  22 use crate::util::test_utils;
  23 use crate::util::errors::APIError;
  24 use crate::util::ser::{Writeable, ReadableArgs};
  25 use crate::util::config::UserConfig;
  26 use crate::util::string::UntrustedString;
  27
  28 use bitcoin::hash_types::BlockHash;
  29
  30 use crate::prelude::*;
  31 use core::default::Default;
  32 use crate::sync::Mutex;
  33
  34 use crate::ln::functional_test_utils::*;
  35
  36 #[test]
  37 fn test_funding_peer_disconnect() {
  38         // Test that we can lock in our funding tx while disconnected
  39         let chanmon_cfgs = create_chanmon_cfgs(2);
  40         let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
  41         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
  42         let persister: test_utils::TestPersister;
  43         let new_chain_monitor: test_utils::TestChainMonitor;
  44         let nodes_0_deserialized: ChannelManager<&test_utils::TestChainMonitor, &test_utils::TestBroadcaster, &test_utils::TestKeysInterface, &test_utils::TestKeysInterface, &test_utils::TestKeysInterface, &test_utils::TestFeeEstimator, &test_utils::TestRouter, &test_utils::TestLogger>;
  45         let mut nodes = create_network(2, &node_cfgs, &node_chanmgrs);
  46         let tx = create_chan_between_nodes_with_value_init(&nodes[0], &nodes[1], 100000, 10001);
  47
  48         nodes[0].node.peer_disconnected(&nodes[1].node.get_our_node_id());
  49         nodes[1].node.peer_disconnected(&nodes[0].node.get_our_node_id());
  50
  51         confirm_transaction(&nodes[0], &tx);
  52         let events_1 = nodes[0].node.get_and_clear_pending_msg_events();
  53         assert!(events_1.is_empty());
  54
  55         let mut reconnect_args = ReconnectArgs::new(&nodes[0], &nodes[1]);
  56         reconnect_args.send_channel_ready.1 = true;
  57         reconnect_nodes(reconnect_args);
  58
  59         nodes[0].node.peer_disconnected(&nodes[1].node.get_our_node_id());
  60         nodes[1].node.peer_disconnected(&nodes[0].node.get_our_node_id());
  61
  62         confirm_transaction(&nodes[1], &tx);
  63         let events_2 = nodes[1].node.get_and_clear_pending_msg_events();
  64         assert!(events_2.is_empty());
  65
  66         nodes[0].node.peer_connected(&nodes[1].node.get_our_node_id(), &msgs::Init {
  67                 features: nodes[1].node.init_features(), networks: None, remote_network_address: None
  68         }, true).unwrap();
  69         let as_reestablish = get_chan_reestablish_msgs!(nodes[0], nodes[1]).pop().unwrap();
  70         nodes[1].node.peer_connected(&nodes[0].node.get_our_node_id(), &msgs::Init {
  71                 features: nodes[0].node.init_features(), networks: None, remote_network_address: None
  72         }, false).unwrap();
  73         let bs_reestablish = get_chan_reestablish_msgs!(nodes[1], nodes[0]).pop().unwrap();
  74
  75         // nodes[0] hasn't yet received a channel_ready, so it only sends that on reconnect.
  76         nodes[0].node.handle_channel_reestablish(&nodes[1].node.get_our_node_id(), &bs_reestablish);
  77         let events_3 = nodes[0].node.get_and_clear_pending_msg_events();
  78         assert_eq!(events_3.len(), 1);
  79         let as_channel_ready = match events_3[0] {
  80                 MessageSendEvent::SendChannelReady { ref node_id, ref msg } => {
  81                         assert_eq!(*node_id, nodes[1].node.get_our_node_id());
  82                         msg.clone()
  83                 },
  84                 _ => panic!("Unexpected event {:?}", events_3[0]),
  85         };
  86
  87         // nodes[1] received nodes[0]'s channel_ready on the first reconnect above, so it should send
  88         // announcement_signatures as well as channel_update.
  89         nodes[1].node.handle_channel_reestablish(&nodes[0].node.get_our_node_id(), &as_reestablish);
  90         let events_4 = nodes[1].node.get_and_clear_pending_msg_events();
  91         assert_eq!(events_4.len(), 3);
  92         let chan_id;
  93         let bs_channel_ready = match events_4[0] {
  94                 MessageSendEvent::SendChannelReady { ref node_id, ref msg } => {
  95                         assert_eq!(*node_id, nodes[0].node.get_our_node_id());
  96                         chan_id = msg.channel_id;
  97                         msg.clone()
  98                 },
  99                 _ => panic!("Unexpected event {:?}", events_4[0]),
 100         };
 101         let bs_announcement_sigs = match events_4[1] {
 102                 MessageSendEvent::SendAnnouncementSignatures { ref node_id, ref msg } => {
 103                         assert_eq!(*node_id, nodes[0].node.get_our_node_id());
 104                         msg.clone()
 105                 },
 106                 _ => panic!("Unexpected event {:?}", events_4[1]),
 107         };
 108         match events_4[2] {
 109                 MessageSendEvent::SendChannelUpdate { ref node_id, msg: _ } => {
 110                         assert_eq!(*node_id, nodes[0].node.get_our_node_id());
 111                 },
 112                 _ => panic!("Unexpected event {:?}", events_4[2]),
 113         }
 114
 115         // Re-deliver nodes[0]'s channel_ready, which nodes[1] can safely ignore. It currently
 116         // generates a duplicative private channel_update
 117         nodes[1].node.handle_channel_ready(&nodes[0].node.get_our_node_id(), &as_channel_ready);
 118         let events_5 = nodes[1].node.get_and_clear_pending_msg_events();
 119         assert_eq!(events_5.len(), 1);
 120         match events_5[0] {
 121                 MessageSendEvent::SendChannelUpdate { ref node_id, msg: _ } => {
 122                         assert_eq!(*node_id, nodes[0].node.get_our_node_id());
 123                 },
 124                 _ => panic!("Unexpected event {:?}", events_5[0]),
 125         };
 126
 127         // When we deliver nodes[1]'s channel_ready, however, nodes[0] will generate its
 128         // announcement_signatures.
 129         nodes[0].node.handle_channel_ready(&nodes[1].node.get_our_node_id(), &bs_channel_ready);
 130         let events_6 = nodes[0].node.get_and_clear_pending_msg_events();
 131         assert_eq!(events_6.len(), 1);
 132         let as_announcement_sigs = match events_6[0] {
 133                 MessageSendEvent::SendAnnouncementSignatures { ref node_id, ref msg } => {
 134                         assert_eq!(*node_id, nodes[1].node.get_our_node_id());
 135                         msg.clone()
 136                 },
 137                 _ => panic!("Unexpected event {:?}", events_6[0]),
 138         };
 139         expect_channel_ready_event(&nodes[0], &nodes[1].node.get_our_node_id());
 140         expect_channel_ready_event(&nodes[1], &nodes[0].node.get_our_node_id());
 141
 142         // When we deliver nodes[1]'s announcement_signatures to nodes[0], nodes[0] should immediately
 143         // broadcast the channel announcement globally, as well as re-send its (now-public)
 144         // channel_update.
 145         nodes[0].node.handle_announcement_signatures(&nodes[1].node.get_our_node_id(), &bs_announcement_sigs);
 146         let events_7 = nodes[0].node.get_and_clear_pending_msg_events();
 147         assert_eq!(events_7.len(), 1);
 148         let (chan_announcement, as_update) = match events_7[0] {
 149                 MessageSendEvent::BroadcastChannelAnnouncement { ref msg, ref update_msg } => {
 150                         (msg.clone(), update_msg.clone().unwrap())
 151                 },
 152                 _ => panic!("Unexpected event {:?}", events_7[0]),
 153         };
 154
 155         // Finally, deliver nodes[0]'s announcement_signatures to nodes[1] and make sure it creates the
 156         // same channel_announcement.
 157         nodes[1].node.handle_announcement_signatures(&nodes[0].node.get_our_node_id(), &as_announcement_sigs);
 158         let events_8 = nodes[1].node.get_and_clear_pending_msg_events();
 159         assert_eq!(events_8.len(), 1);
 160         let bs_update = match events_8[0] {
 161                 MessageSendEvent::BroadcastChannelAnnouncement { ref msg, ref update_msg } => {
 162                         assert_eq!(*msg, chan_announcement);
 163                         update_msg.clone().unwrap()
 164                 },
 165                 _ => panic!("Unexpected event {:?}", events_8[0]),
 166         };
 167
 168         // Provide the channel announcement and public updates to the network graph
 169         nodes[0].gossip_sync.handle_channel_announcement(&chan_announcement).unwrap();
 170         nodes[0].gossip_sync.handle_channel_update(&bs_update).unwrap();
 171         nodes[0].gossip_sync.handle_channel_update(&as_update).unwrap();
 172
 173         let (route, _, _, _) = get_route_and_payment_hash!(nodes[0], nodes[1], 1000000);
 174         let payment_preimage = send_along_route(&nodes[0], route, &[&nodes[1]], 1000000).0;
 175         claim_payment(&nodes[0], &[&nodes[1]], payment_preimage);
 176
 177         // Check that after deserialization and reconnection we can still generate an identical
 178         // channel_announcement from the cached signatures.
 179         nodes[1].node.peer_disconnected(&nodes[0].node.get_our_node_id());
 180
 181         let chan_0_monitor_serialized = get_monitor!(nodes[0], chan_id).encode();
 182
 183         reload_node!(nodes[0], &nodes[0].node.encode(), &[&chan_0_monitor_serialized], persister, new_chain_monitor, nodes_0_deserialized);
 184
 185         reconnect_nodes(ReconnectArgs::new(&nodes[0], &nodes[1]));
 186 }
 187
 188 #[test]
 189 fn test_no_txn_manager_serialize_deserialize() {
 190         let chanmon_cfgs = create_chanmon_cfgs(2);
 191         let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
 192         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
 193         let persister: test_utils::TestPersister;
 194         let new_chain_monitor: test_utils::TestChainMonitor;
 195         let nodes_0_deserialized: ChannelManager<&test_utils::TestChainMonitor, &test_utils::TestBroadcaster, &test_utils::TestKeysInterface, &test_utils::TestKeysInterface, &test_utils::TestKeysInterface, &test_utils::TestFeeEstimator, &test_utils::TestRouter, &test_utils::TestLogger>;
 196         let mut nodes = create_network(2, &node_cfgs, &node_chanmgrs);
 197
 198         let tx = create_chan_between_nodes_with_value_init(&nodes[0], &nodes[1], 100000, 10001);
 199
 200         nodes[1].node.peer_disconnected(&nodes[0].node.get_our_node_id());
 201
 202         let chan_0_monitor_serialized =
 203                 get_monitor!(nodes[0], OutPoint { txid: tx.txid(), index: 0 }.to_channel_id()).encode();
 204         reload_node!(nodes[0], nodes[0].node.encode(), &[&chan_0_monitor_serialized], persister, new_chain_monitor, nodes_0_deserialized);
 205
 206         nodes[0].node.peer_connected(&nodes[1].node.get_our_node_id(), &msgs::Init {
 207                 features: nodes[1].node.init_features(), networks: None, remote_network_address: None
 208         }, true).unwrap();
 209         let reestablish_1 = get_chan_reestablish_msgs!(nodes[0], nodes[1]);
 210         nodes[1].node.peer_connected(&nodes[0].node.get_our_node_id(), &msgs::Init {
 211                 features: nodes[0].node.init_features(), networks: None, remote_network_address: None
 212         }, false).unwrap();
 213         let reestablish_2 = get_chan_reestablish_msgs!(nodes[1], nodes[0]);
 214
 215         nodes[1].node.handle_channel_reestablish(&nodes[0].node.get_our_node_id(), &reestablish_1[0]);
 216         assert!(nodes[1].node.get_and_clear_pending_msg_events().is_empty());
 217         nodes[0].node.handle_channel_reestablish(&nodes[1].node.get_our_node_id(), &reestablish_2[0]);
 218         assert!(nodes[0].node.get_and_clear_pending_msg_events().is_empty());
 219
 220         let (channel_ready, _) = create_chan_between_nodes_with_value_confirm(&nodes[0], &nodes[1], &tx);
 221         let (announcement, as_update, bs_update) = create_chan_between_nodes_with_value_b(&nodes[0], &nodes[1], &channel_ready);
 222         for node in nodes.iter() {
 223                 assert!(node.gossip_sync.handle_channel_announcement(&announcement).unwrap());
 224                 node.gossip_sync.handle_channel_update(&as_update).unwrap();
 225                 node.gossip_sync.handle_channel_update(&bs_update).unwrap();
 226         }
 227
 228         send_payment(&nodes[0], &[&nodes[1]], 1000000);
 229 }
 230
 231 #[test]
 232 fn test_manager_serialize_deserialize_events() {
 233         // This test makes sure the events field in ChannelManager survives de/serialization
 234         let chanmon_cfgs = create_chanmon_cfgs(2);
 235         let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
 236         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
 237         let persister: test_utils::TestPersister;
 238         let new_chain_monitor: test_utils::TestChainMonitor;
 239         let nodes_0_deserialized: ChannelManager<&test_utils::TestChainMonitor, &test_utils::TestBroadcaster, &test_utils::TestKeysInterface, &test_utils::TestKeysInterface, &test_utils::TestKeysInterface, &test_utils::TestFeeEstimator, &test_utils::TestRouter, &test_utils::TestLogger>;
 240         let mut nodes = create_network(2, &node_cfgs, &node_chanmgrs);
 241
 242         // Start creating a channel, but stop right before broadcasting the funding transaction
 243         let channel_value = 100000;
 244         let push_msat = 10001;
 245         let node_a = nodes.remove(0);
 246         let node_b = nodes.remove(0);
 247         node_a.node.create_channel(node_b.node.get_our_node_id(), channel_value, push_msat, 42, None).unwrap();
 248         node_b.node.handle_open_channel(&node_a.node.get_our_node_id(), &get_event_msg!(node_a, MessageSendEvent::SendOpenChannel, node_b.node.get_our_node_id()));
 249         node_a.node.handle_accept_channel(&node_b.node.get_our_node_id(), &get_event_msg!(node_b, MessageSendEvent::SendAcceptChannel, node_a.node.get_our_node_id()));
 250
 251         let (temporary_channel_id, tx, funding_output) = create_funding_transaction(&node_a, &node_b.node.get_our_node_id(), channel_value, 42);
 252
 253         node_a.node.funding_transaction_generated(&temporary_channel_id, &node_b.node.get_our_node_id(), tx.clone()).unwrap();
 254         check_added_monitors!(node_a, 0);
 255
 256         node_b.node.handle_funding_created(&node_a.node.get_our_node_id(), &get_event_msg!(node_a, MessageSendEvent::SendFundingCreated, node_b.node.get_our_node_id()));
 257         {
 258                 let mut added_monitors = node_b.chain_monitor.added_monitors.lock().unwrap();
 259                 assert_eq!(added_monitors.len(), 1);
 260                 assert_eq!(added_monitors[0].0, funding_output);
 261                 added_monitors.clear();
 262         }
 263
 264         let bs_funding_signed = get_event_msg!(node_b, MessageSendEvent::SendFundingSigned, node_a.node.get_our_node_id());
 265         node_a.node.handle_funding_signed(&node_b.node.get_our_node_id(), &bs_funding_signed);
 266         {
 267                 let mut added_monitors = node_a.chain_monitor.added_monitors.lock().unwrap();
 268                 assert_eq!(added_monitors.len(), 1);
 269                 assert_eq!(added_monitors[0].0, funding_output);
 270                 added_monitors.clear();
 271         }
 272         // Normally, this is where node_a would broadcast the funding transaction, but the test de/serializes first instead
 273
 274         expect_channel_pending_event(&node_a, &node_b.node.get_our_node_id());
 275         expect_channel_pending_event(&node_b, &node_a.node.get_our_node_id());
 276
 277         nodes.push(node_a);
 278         nodes.push(node_b);
 279
 280         // Start the de/seriailization process mid-channel creation to check that the channel manager will hold onto events that are serialized
 281         let chan_0_monitor_serialized = get_monitor!(nodes[0], bs_funding_signed.channel_id).encode();
 282         reload_node!(nodes[0], nodes[0].node.encode(), &[&chan_0_monitor_serialized], persister, new_chain_monitor, nodes_0_deserialized);
 283
 284         nodes[1].node.peer_disconnected(&nodes[0].node.get_our_node_id());
 285
 286         // After deserializing, make sure the funding_transaction is still held by the channel manager
 287         let events_4 = nodes[0].node.get_and_clear_pending_events();
 288         assert_eq!(events_4.len(), 0);
 289         assert_eq!(nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().len(), 1);
 290         assert_eq!(nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap()[0].txid(), funding_output.txid);
 291
 292         // Make sure the channel is functioning as though the de/serialization never happened
 293         assert_eq!(nodes[0].node.list_channels().len(), 1);
 294
 295         nodes[0].node.peer_connected(&nodes[1].node.get_our_node_id(), &msgs::Init {
 296                 features: nodes[1].node.init_features(), networks: None, remote_network_address: None
 297         }, true).unwrap();
 298         let reestablish_1 = get_chan_reestablish_msgs!(nodes[0], nodes[1]);
 299         nodes[1].node.peer_connected(&nodes[0].node.get_our_node_id(), &msgs::Init {
 300                 features: nodes[0].node.init_features(), networks: None, remote_network_address: None
 301         }, false).unwrap();
 302         let reestablish_2 = get_chan_reestablish_msgs!(nodes[1], nodes[0]);
 303
 304         nodes[1].node.handle_channel_reestablish(&nodes[0].node.get_our_node_id(), &reestablish_1[0]);
 305         assert!(nodes[1].node.get_and_clear_pending_msg_events().is_empty());
 306         nodes[0].node.handle_channel_reestablish(&nodes[1].node.get_our_node_id(), &reestablish_2[0]);
 307         assert!(nodes[0].node.get_and_clear_pending_msg_events().is_empty());
 308
 309         let (channel_ready, _) = create_chan_between_nodes_with_value_confirm(&nodes[0], &nodes[1], &tx);
 310         let (announcement, as_update, bs_update) = create_chan_between_nodes_with_value_b(&nodes[0], &nodes[1], &channel_ready);
 311         for node in nodes.iter() {
 312                 assert!(node.gossip_sync.handle_channel_announcement(&announcement).unwrap());
 313                 node.gossip_sync.handle_channel_update(&as_update).unwrap();
 314                 node.gossip_sync.handle_channel_update(&bs_update).unwrap();
 315         }
 316
 317         send_payment(&nodes[0], &[&nodes[1]], 1000000);
 318 }
 319
 320 #[test]
 321 fn test_simple_manager_serialize_deserialize() {
 322         let chanmon_cfgs = create_chanmon_cfgs(2);
 323         let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
 324         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
 325         let persister: test_utils::TestPersister;
 326         let new_chain_monitor: test_utils::TestChainMonitor;
 327         let nodes_0_deserialized: ChannelManager<&test_utils::TestChainMonitor, &test_utils::TestBroadcaster, &test_utils::TestKeysInterface, &test_utils::TestKeysInterface, &test_utils::TestKeysInterface, &test_utils::TestFeeEstimator, &test_utils::TestRouter, &test_utils::TestLogger>;
 328         let mut nodes = create_network(2, &node_cfgs, &node_chanmgrs);
 329         let chan_id = create_announced_chan_between_nodes(&nodes, 0, 1).2;
 330
 331         let (our_payment_preimage, _, _) = route_payment(&nodes[0], &[&nodes[1]], 1000000);
 332         let (_, our_payment_hash, _) = route_payment(&nodes[0], &[&nodes[1]], 1000000);
 333
 334         nodes[1].node.peer_disconnected(&nodes[0].node.get_our_node_id());
 335
 336         let chan_0_monitor_serialized = get_monitor!(nodes[0], chan_id).encode();
 337         reload_node!(nodes[0], nodes[0].node.encode(), &[&chan_0_monitor_serialized], persister, new_chain_monitor, nodes_0_deserialized);
 338
 339         reconnect_nodes(ReconnectArgs::new(&nodes[0], &nodes[1]));
 340
 341         fail_payment(&nodes[0], &[&nodes[1]], our_payment_hash);
 342         claim_payment(&nodes[0], &[&nodes[1]], our_payment_preimage);
 343 }
 344
 345 #[test]
 346 fn test_manager_serialize_deserialize_inconsistent_monitor() {
 347         // Test deserializing a ChannelManager with an out-of-date ChannelMonitor
 348         let chanmon_cfgs = create_chanmon_cfgs(4);
 349         let node_cfgs = create_node_cfgs(4, &chanmon_cfgs);
 350         let node_chanmgrs = create_node_chanmgrs(4, &node_cfgs, &[None, None, None, None]);
 351         let logger: test_utils::TestLogger;
 352         let fee_estimator: test_utils::TestFeeEstimator;
 353         let persister: test_utils::TestPersister;
 354         let new_chain_monitor: test_utils::TestChainMonitor;
 355         let nodes_0_deserialized: ChannelManager<&test_utils::TestChainMonitor, &test_utils::TestBroadcaster, &test_utils::TestKeysInterface, &test_utils::TestKeysInterface, &test_utils::TestKeysInterface, &test_utils::TestFeeEstimator, &test_utils::TestRouter, &test_utils::TestLogger>;
 356         let mut nodes = create_network(4, &node_cfgs, &node_chanmgrs);
 357         let chan_id_1 = create_announced_chan_between_nodes(&nodes, 0, 1).2;
 358         let chan_id_2 = create_announced_chan_between_nodes(&nodes, 2, 0).2;
 359         let (_, _, channel_id, funding_tx) = create_announced_chan_between_nodes(&nodes, 0, 3);
 360
 361         let mut node_0_stale_monitors_serialized = Vec::new();
 362         for chan_id_iter in &[chan_id_1, chan_id_2, channel_id] {
 363                 let mut writer = test_utils::TestVecWriter(Vec::new());
 364                 get_monitor!(nodes[0], chan_id_iter).write(&mut writer).unwrap();
 365                 node_0_stale_monitors_serialized.push(writer.0);
 366         }
 367
 368         let (our_payment_preimage, _, _) = route_payment(&nodes[2], &[&nodes[0], &nodes[1]], 1000000);
 369
 370         // Serialize the ChannelManager here, but the monitor we keep up-to-date
 371         let nodes_0_serialized = nodes[0].node.encode();
 372
 373         route_payment(&nodes[0], &[&nodes[3]], 1000000);
 374         nodes[1].node.peer_disconnected(&nodes[0].node.get_our_node_id());
 375         nodes[2].node.peer_disconnected(&nodes[0].node.get_our_node_id());
 376         nodes[3].node.peer_disconnected(&nodes[0].node.get_our_node_id());
 377
 378         // Now the ChannelMonitor (which is now out-of-sync with ChannelManager for channel w/
 379         // nodes[3])
 380         let mut node_0_monitors_serialized = Vec::new();
 381         for chan_id_iter in &[chan_id_1, chan_id_2, channel_id] {
 382                 node_0_monitors_serialized.push(get_monitor!(nodes[0], chan_id_iter).encode());
 383         }
 384
 385         logger = test_utils::TestLogger::new();
 386         fee_estimator = test_utils::TestFeeEstimator { sat_per_kw: Mutex::new(253) };
 387         persister = test_utils::TestPersister::new();
 388         let keys_manager = &chanmon_cfgs[0].keys_manager;
 389         new_chain_monitor = test_utils::TestChainMonitor::new(Some(nodes[0].chain_source), nodes[0].tx_broadcaster, &logger, &fee_estimator, &persister, keys_manager);
 390         nodes[0].chain_monitor = &new_chain_monitor;
 391
 392
 393         let mut node_0_stale_monitors = Vec::new();
 394         for serialized in node_0_stale_monitors_serialized.iter() {
 395                 let mut read = &serialized[..];
 396                 let (_, monitor) = <(BlockHash, ChannelMonitor<EnforcingSigner>)>::read(&mut read, (keys_manager, keys_manager)).unwrap();
 397                 assert!(read.is_empty());
 398                 node_0_stale_monitors.push(monitor);
 399         }
 400
 401         let mut node_0_monitors = Vec::new();
 402         for serialized in node_0_monitors_serialized.iter() {
 403                 let mut read = &serialized[..];
 404                 let (_, monitor) = <(BlockHash, ChannelMonitor<EnforcingSigner>)>::read(&mut read, (keys_manager, keys_manager)).unwrap();
 405                 assert!(read.is_empty());
 406                 node_0_monitors.push(monitor);
 407         }
 408
 409         let mut nodes_0_read = &nodes_0_serialized[..];
 410         if let Err(msgs::DecodeError::InvalidValue) =
 411                 <(BlockHash, ChannelManager<&test_utils::TestChainMonitor, &test_utils::TestBroadcaster, &test_utils::TestKeysInterface, &test_utils::TestKeysInterface, &test_utils::TestKeysInterface, &test_utils::TestFeeEstimator, &test_utils::TestRouter, &test_utils::TestLogger>)>::read(&mut nodes_0_read, ChannelManagerReadArgs {
 412                 default_config: UserConfig::default(),
 413                 entropy_source: keys_manager,
 414                 node_signer: keys_manager,
 415                 signer_provider: keys_manager,
 416                 fee_estimator: &fee_estimator,
 417                 router: &nodes[0].router,
 418                 chain_monitor: nodes[0].chain_monitor,
 419                 tx_broadcaster: nodes[0].tx_broadcaster.clone(),
 420                 logger: &logger,
 421                 channel_monitors: node_0_stale_monitors.iter_mut().map(|monitor| { (monitor.get_funding_txo().0, monitor) }).collect(),
 422         }) { } else {
 423                 panic!("If the monitor(s) are stale, this indicates a bug and we should get an Err return");
 424         };
 425
 426         let mut nodes_0_read = &nodes_0_serialized[..];
 427         let (_, nodes_0_deserialized_tmp) =
 428                 <(BlockHash, ChannelManager<&test_utils::TestChainMonitor, &test_utils::TestBroadcaster, &test_utils::TestKeysInterface, &test_utils::TestKeysInterface, &test_utils::TestKeysInterface, &test_utils::TestFeeEstimator, &test_utils::TestRouter, &test_utils::TestLogger>)>::read(&mut nodes_0_read, ChannelManagerReadArgs {
 429                 default_config: UserConfig::default(),
 430                 entropy_source: keys_manager,
 431                 node_signer: keys_manager,
 432                 signer_provider: keys_manager,
 433                 fee_estimator: &fee_estimator,
 434                 router: nodes[0].router,
 435                 chain_monitor: nodes[0].chain_monitor,
 436                 tx_broadcaster: nodes[0].tx_broadcaster.clone(),
 437                 logger: &logger,
 438                 channel_monitors: node_0_monitors.iter_mut().map(|monitor| { (monitor.get_funding_txo().0, monitor) }).collect(),
 439         }).unwrap();
 440         nodes_0_deserialized = nodes_0_deserialized_tmp;
 441         assert!(nodes_0_read.is_empty());
 442
 443         for monitor in node_0_monitors.drain(..) {
 444                 assert_eq!(nodes[0].chain_monitor.watch_channel(monitor.get_funding_txo().0, monitor),
 445                         ChannelMonitorUpdateStatus::Completed);
 446                 check_added_monitors!(nodes[0], 1);
 447         }
 448         nodes[0].node = &nodes_0_deserialized;
 449
 450         check_closed_event!(nodes[0], 1, ClosureReason::OutdatedChannelManager);
 451         { // Channel close should result in a commitment tx
 452                 nodes[0].node.timer_tick_occurred();
 453                 let txn = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap();
 454                 assert_eq!(txn.len(), 1);
 455                 check_spends!(txn[0], funding_tx);
 456                 assert_eq!(txn[0].input[0].previous_output.txid, funding_tx.txid());
 457         }
 458         check_added_monitors!(nodes[0], 1);
 459
 460         // nodes[1] and nodes[2] have no lost state with nodes[0]...
 461         reconnect_nodes(ReconnectArgs::new(&nodes[0], &nodes[1]));
 462         reconnect_nodes(ReconnectArgs::new(&nodes[0], &nodes[2]));
 463         //... and we can even still claim the payment!
 464         claim_payment(&nodes[2], &[&nodes[0], &nodes[1]], our_payment_preimage);
 465
 466         nodes[3].node.peer_connected(&nodes[0].node.get_our_node_id(), &msgs::Init {
 467                 features: nodes[0].node.init_features(), networks: None, remote_network_address: None
 468         }, true).unwrap();
 469         let reestablish = get_chan_reestablish_msgs!(nodes[3], nodes[0]).pop().unwrap();
 470         nodes[0].node.peer_connected(&nodes[3].node.get_our_node_id(), &msgs::Init {
 471                 features: nodes[3].node.init_features(), networks: None, remote_network_address: None
 472         }, false).unwrap();
 473         nodes[0].node.handle_channel_reestablish(&nodes[3].node.get_our_node_id(), &reestablish);
 474         let mut found_err = false;
 475         for msg_event in nodes[0].node.get_and_clear_pending_msg_events() {
 476                 if let MessageSendEvent::HandleError { ref action, .. } = msg_event {
 477                         match action {
 478                                 &ErrorAction::SendErrorMessage { ref msg } => {
 479                                         assert_eq!(msg.channel_id, channel_id);
 480                                         assert!(!found_err);
 481                                         found_err = true;
 482                                 },
 483                                 _ => panic!("Unexpected event!"),
 484                         }
 485                 }
 486         }
 487         assert!(found_err);
 488 }
 489
 490 fn do_test_data_loss_protect(reconnect_panicing: bool) {
 491         // When we get a data_loss_protect proving we're behind, we immediately panic as the
 492         // chain::Watch API requirements have been violated (e.g. the user restored from a backup). The
 493         // panic message informs the user they should force-close without broadcasting, which is tested
 494         // if `reconnect_panicing` is not set.
 495         let mut chanmon_cfgs = create_chanmon_cfgs(2);
 496         // We broadcast during Drop because chanmon is out of sync with chanmgr, which would cause a panic
 497         // during signing due to revoked tx
 498         chanmon_cfgs[0].keys_manager.disable_revocation_policy_check = true;
 499         let persister;
 500         let new_chain_monitor;
 501         let nodes_0_deserialized;
 502         let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
 503         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
 504         let mut nodes = create_network(2, &node_cfgs, &node_chanmgrs);
 505
 506         let chan = create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1000000, 1000000);
 507
 508         // Cache node A state before any channel update
 509         let previous_node_state = nodes[0].node.encode();
 510         let previous_chain_monitor_state = get_monitor!(nodes[0], chan.2).encode();
 511
 512         send_payment(&nodes[0], &vec!(&nodes[1])[..], 8000000);
 513         send_payment(&nodes[0], &vec!(&nodes[1])[..], 8000000);
 514
 515         nodes[0].node.peer_disconnected(&nodes[1].node.get_our_node_id());
 516         nodes[1].node.peer_disconnected(&nodes[0].node.get_our_node_id());
 517
 518         reload_node!(nodes[0], previous_node_state, &[&previous_chain_monitor_state], persister, new_chain_monitor, nodes_0_deserialized);
 519
 520         if reconnect_panicing {
 521                 nodes[0].node.peer_connected(&nodes[1].node.get_our_node_id(), &msgs::Init {
 522                         features: nodes[1].node.init_features(), networks: None, remote_network_address: None
 523                 }, true).unwrap();
 524                 nodes[1].node.peer_connected(&nodes[0].node.get_our_node_id(), &msgs::Init {
 525                         features: nodes[0].node.init_features(), networks: None, remote_network_address: None
 526                 }, false).unwrap();
 527
 528                 let reestablish_1 = get_chan_reestablish_msgs!(nodes[0], nodes[1]);
 529
 530                 // Check we close channel detecting A is fallen-behind
 531                 // Check that we sent the warning message when we detected that A has fallen behind,
 532                 // and give the possibility for A to recover from the warning.
 533                 nodes[1].node.handle_channel_reestablish(&nodes[0].node.get_our_node_id(), &reestablish_1[0]);
 534                 let warn_msg = "Peer attempted to reestablish channel with a very old local commitment transaction".to_owned();
 535                 assert!(check_warn_msg!(nodes[1], nodes[0].node.get_our_node_id(), chan.2).contains(&warn_msg));
 536
 537                 {
 538                         let mut node_txn = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().clone();
 539                         // The node B should not broadcast the transaction to force close the channel!
 540                         assert!(node_txn.is_empty());
 541                 }
 542
 543                 let reestablish_0 = get_chan_reestablish_msgs!(nodes[1], nodes[0]);
 544                 // Check A panics upon seeing proof it has fallen behind.
 545                 nodes[0].node.handle_channel_reestablish(&nodes[1].node.get_our_node_id(), &reestablish_0[0]);
 546                 return; // By this point we should have panic'ed!
 547         }
 548
 549         nodes[0].node.force_close_without_broadcasting_txn(&chan.2, &nodes[1].node.get_our_node_id()).unwrap();
 550         check_added_monitors!(nodes[0], 1);
 551         check_closed_event!(nodes[0], 1, ClosureReason::HolderForceClosed);
 552         {
 553                 let node_txn = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap();
 554                 assert_eq!(node_txn.len(), 0);
 555         }
 556
 557         for msg in nodes[0].node.get_and_clear_pending_msg_events() {
 558                 if let MessageSendEvent::BroadcastChannelUpdate { .. } = msg {
 559                 } else if let MessageSendEvent::HandleError { ref action, .. } = msg {
 560                         match action {
 561                                 &ErrorAction::SendErrorMessage { ref msg } => {
 562                                         assert_eq!(msg.data, "Channel force-closed");
 563                                 },
 564                                 _ => panic!("Unexpected event!"),
 565                         }
 566                 } else {
 567                         panic!("Unexpected event {:?}", msg)
 568                 }
 569         }
 570
 571         // after the warning message sent by B, we should not able to
 572         // use the channel, or reconnect with success to the channel.
 573         assert!(nodes[0].node.list_usable_channels().is_empty());
 574         nodes[0].node.peer_connected(&nodes[1].node.get_our_node_id(), &msgs::Init {
 575                 features: nodes[1].node.init_features(), networks: None, remote_network_address: None
 576         }, true).unwrap();
 577         nodes[1].node.peer_connected(&nodes[0].node.get_our_node_id(), &msgs::Init {
 578                 features: nodes[0].node.init_features(), networks: None, remote_network_address: None
 579         }, false).unwrap();
 580         let retry_reestablish = get_chan_reestablish_msgs!(nodes[1], nodes[0]);
 581
 582         nodes[0].node.handle_channel_reestablish(&nodes[1].node.get_our_node_id(), &retry_reestablish[0]);
 583         let mut err_msgs_0 = Vec::with_capacity(1);
 584         for msg in nodes[0].node.get_and_clear_pending_msg_events() {
 585                 if let MessageSendEvent::HandleError { ref action, .. } = msg {
 586                         match action {
 587                                 &ErrorAction::SendErrorMessage { ref msg } => {
 588                                         assert_eq!(msg.data, format!("Got a message for a channel from the wrong node! No such channel for the passed counterparty_node_id {}", &nodes[1].node.get_our_node_id()));
 589                                         err_msgs_0.push(msg.clone());
 590                                 },
 591                                 _ => panic!("Unexpected event!"),
 592                         }
 593                 } else {
 594                         panic!("Unexpected event!");
 595                 }
 596         }
 597         assert_eq!(err_msgs_0.len(), 1);
 598         nodes[1].node.handle_error(&nodes[0].node.get_our_node_id(), &err_msgs_0[0]);
 599         assert!(nodes[1].node.list_usable_channels().is_empty());
 600         check_added_monitors!(nodes[1], 1);
 601         check_closed_event!(nodes[1], 1, ClosureReason::CounterpartyForceClosed { peer_msg: UntrustedString(format!("Got a message for a channel from the wrong node! No such channel for the passed counterparty_node_id {}", &nodes[1].node.get_our_node_id())) });
 602         check_closed_broadcast!(nodes[1], false);
 603 }
 604
 605 #[test]
 606 #[should_panic]
 607 fn test_data_loss_protect_showing_stale_state_panics() {
 608         do_test_data_loss_protect(true);
 609 }
 610
 611 #[test]
 612 fn test_force_close_without_broadcast() {
 613         do_test_data_loss_protect(false);
 614 }
 615
 616 #[test]
 617 fn test_forwardable_regen() {
 618         // Tests that if we reload a ChannelManager while forwards are pending we will regenerate the
 619         // PendingHTLCsForwardable event automatically, ensuring we don't forget to forward/receive
 620         // HTLCs.
 621         // We test it for both payment receipt and payment forwarding.
 622
 623         let chanmon_cfgs = create_chanmon_cfgs(3);
 624         let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
 625         let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[None, None, None]);
 626         let persister: test_utils::TestPersister;
 627         let new_chain_monitor: test_utils::TestChainMonitor;
 628         let nodes_1_deserialized: ChannelManager<&test_utils::TestChainMonitor, &test_utils::TestBroadcaster, &test_utils::TestKeysInterface, &test_utils::TestKeysInterface, &test_utils::TestKeysInterface, &test_utils::TestFeeEstimator, &test_utils::TestRouter, &test_utils::TestLogger>;
 629         let mut nodes = create_network(3, &node_cfgs, &node_chanmgrs);
 630         let chan_id_1 = create_announced_chan_between_nodes(&nodes, 0, 1).2;
 631         let chan_id_2 = create_announced_chan_between_nodes(&nodes, 1, 2).2;
 632
 633         // First send a payment to nodes[1]
 634         let (route, payment_hash, payment_preimage, payment_secret) = get_route_and_payment_hash!(nodes[0], nodes[1], 100_000);
 635         nodes[0].node.send_payment_with_route(&route, payment_hash,
 636                 RecipientOnionFields::secret_only(payment_secret), PaymentId(payment_hash.0)).unwrap();
 637         check_added_monitors!(nodes[0], 1);
 638
 639         let mut events = nodes[0].node.get_and_clear_pending_msg_events();
 640         assert_eq!(events.len(), 1);
 641         let payment_event = SendEvent::from_event(events.pop().unwrap());
 642         nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &payment_event.msgs[0]);
 643         commitment_signed_dance!(nodes[1], nodes[0], payment_event.commitment_msg, false);
 644
 645         expect_pending_htlcs_forwardable_ignore!(nodes[1]);
 646
 647         // Next send a payment which is forwarded by nodes[1]
 648         let (route_2, payment_hash_2, payment_preimage_2, payment_secret_2) = get_route_and_payment_hash!(nodes[0], nodes[2], 200_000);
 649         nodes[0].node.send_payment_with_route(&route_2, payment_hash_2,
 650                 RecipientOnionFields::secret_only(payment_secret_2), PaymentId(payment_hash_2.0)).unwrap();
 651         check_added_monitors!(nodes[0], 1);
 652
 653         let mut events = nodes[0].node.get_and_clear_pending_msg_events();
 654         assert_eq!(events.len(), 1);
 655         let payment_event = SendEvent::from_event(events.pop().unwrap());
 656         nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &payment_event.msgs[0]);
 657         commitment_signed_dance!(nodes[1], nodes[0], payment_event.commitment_msg, false);
 658
 659         // There is already a PendingHTLCsForwardable event "pending" so another one will not be
 660         // generated
 661         assert!(nodes[1].node.get_and_clear_pending_events().is_empty());
 662
 663         // Now restart nodes[1] and make sure it regenerates a single PendingHTLCsForwardable
 664         nodes[0].node.peer_disconnected(&nodes[1].node.get_our_node_id());
 665         nodes[2].node.peer_disconnected(&nodes[1].node.get_our_node_id());
 666
 667         let chan_0_monitor_serialized = get_monitor!(nodes[1], chan_id_1).encode();
 668         let chan_1_monitor_serialized = get_monitor!(nodes[1], chan_id_2).encode();
 669         reload_node!(nodes[1], nodes[1].node.encode(), &[&chan_0_monitor_serialized, &chan_1_monitor_serialized], persister, new_chain_monitor, nodes_1_deserialized);
 670
 671         reconnect_nodes(ReconnectArgs::new(&nodes[0], &nodes[1]));
 672         // Note that nodes[1] and nodes[2] resend their channel_ready here since they haven't updated
 673         // the commitment state.
 674         let mut reconnect_args = ReconnectArgs::new(&nodes[1], &nodes[2]);
 675         reconnect_args.send_channel_ready = (true, true);
 676         reconnect_nodes(reconnect_args);
 677
 678         assert!(nodes[1].node.get_and_clear_pending_msg_events().is_empty());
 679
 680         expect_pending_htlcs_forwardable!(nodes[1]);
 681         expect_payment_claimable!(nodes[1], payment_hash, payment_secret, 100_000);
 682         check_added_monitors!(nodes[1], 1);
 683
 684         let mut events = nodes[1].node.get_and_clear_pending_msg_events();
 685         assert_eq!(events.len(), 1);
 686         let payment_event = SendEvent::from_event(events.pop().unwrap());
 687         nodes[2].node.handle_update_add_htlc(&nodes[1].node.get_our_node_id(), &payment_event.msgs[0]);
 688         commitment_signed_dance!(nodes[2], nodes[1], payment_event.commitment_msg, false);
 689         expect_pending_htlcs_forwardable!(nodes[2]);
 690         expect_payment_claimable!(nodes[2], payment_hash_2, payment_secret_2, 200_000);
 691
 692         claim_payment(&nodes[0], &[&nodes[1]], payment_preimage);
 693         claim_payment(&nodes[0], &[&nodes[1], &nodes[2]], payment_preimage_2);
 694 }
 695
 696 fn do_test_partial_claim_before_restart(persist_both_monitors: bool) {
 697         // Test what happens if a node receives an MPP payment, claims it, but crashes before
 698         // persisting the ChannelManager. If `persist_both_monitors` is false, also crash after only
 699         // updating one of the two channels' ChannelMonitors. As a result, on startup, we'll (a) still
 700         // have the PaymentClaimable event, (b) have one (or two) channel(s) that goes on chain with the
 701         // HTLC preimage in them, and (c) optionally have one channel that is live off-chain but does
 702         // not have the preimage tied to the still-pending HTLC.
 703         //
 704         // To get to the correct state, on startup we should propagate the preimage to the
 705         // still-off-chain channel, claiming the HTLC as soon as the peer connects, with the monitor
 706         // receiving the preimage without a state update.
 707         //
 708         // Further, we should generate a `PaymentClaimed` event to inform the user that the payment was
 709         // definitely claimed.
 710         let chanmon_cfgs = create_chanmon_cfgs(4);
 711         let node_cfgs = create_node_cfgs(4, &chanmon_cfgs);
 712         let node_chanmgrs = create_node_chanmgrs(4, &node_cfgs, &[None, None, None, None]);
 713
 714         let persister: test_utils::TestPersister;
 715         let new_chain_monitor: test_utils::TestChainMonitor;
 716         let nodes_3_deserialized: ChannelManager<&test_utils::TestChainMonitor, &test_utils::TestBroadcaster, &test_utils::TestKeysInterface, &test_utils::TestKeysInterface, &test_utils::TestKeysInterface, &test_utils::TestFeeEstimator, &test_utils::TestRouter, &test_utils::TestLogger>;
 717
 718         let mut nodes = create_network(4, &node_cfgs, &node_chanmgrs);
 719
 720         create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 100_000, 0);
 721         create_announced_chan_between_nodes_with_value(&nodes, 0, 2, 100_000, 0);
 722         let chan_id_persisted = create_announced_chan_between_nodes_with_value(&nodes, 1, 3, 100_000, 0).2;
 723         let chan_id_not_persisted = create_announced_chan_between_nodes_with_value(&nodes, 2, 3, 100_000, 0).2;
 724
 725         // Create an MPP route for 15k sats, more than the default htlc-max of 10%
 726         let (mut route, payment_hash, payment_preimage, payment_secret) = get_route_and_payment_hash!(nodes[0], nodes[3], 15_000_000);
 727         assert_eq!(route.paths.len(), 2);
 728         route.paths.sort_by(|path_a, _| {
 729                 // Sort the path so that the path through nodes[1] comes first
 730                 if path_a.hops[0].pubkey == nodes[1].node.get_our_node_id() {
 731                         core::cmp::Ordering::Less } else { core::cmp::Ordering::Greater }
 732         });
 733
 734         nodes[0].node.send_payment_with_route(&route, payment_hash,
 735                 RecipientOnionFields::secret_only(payment_secret), PaymentId(payment_hash.0)).unwrap();
 736         check_added_monitors!(nodes[0], 2);
 737
 738         // Send the payment through to nodes[3] *without* clearing the PaymentClaimable event
 739         let mut send_events = nodes[0].node.get_and_clear_pending_msg_events();
 740         assert_eq!(send_events.len(), 2);
 741         let node_1_msgs = remove_first_msg_event_to_node(&nodes[1].node.get_our_node_id(), &mut send_events);
 742         let node_2_msgs = remove_first_msg_event_to_node(&nodes[2].node.get_our_node_id(), &mut send_events);
 743         do_pass_along_path(&nodes[0], &[&nodes[1], &nodes[3]], 15_000_000, payment_hash, Some(payment_secret), node_1_msgs, true, false, None);
 744         do_pass_along_path(&nodes[0], &[&nodes[2], &nodes[3]], 15_000_000, payment_hash, Some(payment_secret), node_2_msgs, true, false, None);
 745
 746         // Now that we have an MPP payment pending, get the latest encoded copies of nodes[3]'s
 747         // monitors and ChannelManager, for use later, if we don't want to persist both monitors.
 748         let mut original_monitor = test_utils::TestVecWriter(Vec::new());
 749         if !persist_both_monitors {
 750                 for outpoint in nodes[3].chain_monitor.chain_monitor.list_monitors() {
 751                         if outpoint.to_channel_id() == chan_id_not_persisted {
 752                                 assert!(original_monitor.0.is_empty());
 753                                 nodes[3].chain_monitor.chain_monitor.get_monitor(outpoint).unwrap().write(&mut original_monitor).unwrap();
 754                         }
 755                 }
 756         }
 757
 758         let original_manager = nodes[3].node.encode();
 759
 760         expect_payment_claimable!(nodes[3], payment_hash, payment_secret, 15_000_000);
 761
 762         nodes[3].node.claim_funds(payment_preimage);
 763         check_added_monitors!(nodes[3], 2);
 764         expect_payment_claimed!(nodes[3], payment_hash, 15_000_000);
 765
 766         // Now fetch one of the two updated ChannelMonitors from nodes[3], and restart pretending we
 767         // crashed in between the two persistence calls - using one old ChannelMonitor and one new one,
 768         // with the old ChannelManager.
 769         let mut updated_monitor = test_utils::TestVecWriter(Vec::new());
 770         for outpoint in nodes[3].chain_monitor.chain_monitor.list_monitors() {
 771                 if outpoint.to_channel_id() == chan_id_persisted {
 772                         assert!(updated_monitor.0.is_empty());
 773                         nodes[3].chain_monitor.chain_monitor.get_monitor(outpoint).unwrap().write(&mut updated_monitor).unwrap();
 774                 }
 775         }
 776         // If `persist_both_monitors` is set, get the second monitor here as well
 777         if persist_both_monitors {
 778                 for outpoint in nodes[3].chain_monitor.chain_monitor.list_monitors() {
 779                         if outpoint.to_channel_id() == chan_id_not_persisted {
 780                                 assert!(original_monitor.0.is_empty());
 781                                 nodes[3].chain_monitor.chain_monitor.get_monitor(outpoint).unwrap().write(&mut original_monitor).unwrap();
 782                         }
 783                 }
 784         }
 785
 786         // Now restart nodes[3].
 787         reload_node!(nodes[3], original_manager, &[&updated_monitor.0, &original_monitor.0], persister, new_chain_monitor, nodes_3_deserialized);
 788
 789         // On startup the preimage should have been copied into the non-persisted monitor:
 790         assert!(get_monitor!(nodes[3], chan_id_persisted).get_stored_preimages().contains_key(&payment_hash));
 791         assert!(get_monitor!(nodes[3], chan_id_not_persisted).get_stored_preimages().contains_key(&payment_hash));
 792
 793         nodes[1].node.peer_disconnected(&nodes[3].node.get_our_node_id());
 794         nodes[2].node.peer_disconnected(&nodes[3].node.get_our_node_id());
 795
 796         // During deserialization, we should have closed one channel and broadcast its latest
 797         // commitment transaction. We should also still have the original PaymentClaimable event we
 798         // never finished processing.
 799         let events = nodes[3].node.get_and_clear_pending_events();
 800         assert_eq!(events.len(), if persist_both_monitors { 4 } else { 3 });
 801         if let Event::PaymentClaimable { amount_msat: 15_000_000, .. } = events[0] { } else { panic!(); }
 802         if let Event::ChannelClosed { reason: ClosureReason::OutdatedChannelManager, .. } = events[1] { } else { panic!(); }
 803         if persist_both_monitors {
 804                 if let Event::ChannelClosed { reason: ClosureReason::OutdatedChannelManager, .. } = events[2] { } else { panic!(); }
 805                 check_added_monitors(&nodes[3], 2);
 806         } else {
 807                 check_added_monitors(&nodes[3], 1);
 808         }
 809
 810         // On restart, we should also get a duplicate PaymentClaimed event as we persisted the
 811         // ChannelManager prior to handling the original one.
 812         if let Event::PaymentClaimed { payment_hash: our_payment_hash, amount_msat: 15_000_000, .. } =
 813                 events[if persist_both_monitors { 3 } else { 2 }]
 814         {
 815                 assert_eq!(payment_hash, our_payment_hash);
 816         } else { panic!(); }
 817
 818         assert_eq!(nodes[3].node.list_channels().len(), if persist_both_monitors { 0 } else { 1 });
 819         if !persist_both_monitors {
 820                 // If one of the two channels is still live, reveal the payment preimage over it.
 821
 822                 nodes[3].node.peer_connected(&nodes[2].node.get_our_node_id(), &msgs::Init {
 823                         features: nodes[2].node.init_features(), networks: None, remote_network_address: None
 824                 }, true).unwrap();
 825                 let reestablish_1 = get_chan_reestablish_msgs!(nodes[3], nodes[2]);
 826                 nodes[2].node.peer_connected(&nodes[3].node.get_our_node_id(), &msgs::Init {
 827                         features: nodes[3].node.init_features(), networks: None, remote_network_address: None
 828                 }, false).unwrap();
 829                 let reestablish_2 = get_chan_reestablish_msgs!(nodes[2], nodes[3]);
 830
 831                 nodes[2].node.handle_channel_reestablish(&nodes[3].node.get_our_node_id(), &reestablish_1[0]);
 832                 get_event_msg!(nodes[2], MessageSendEvent::SendChannelUpdate, nodes[3].node.get_our_node_id());
 833                 assert!(nodes[2].node.get_and_clear_pending_msg_events().is_empty());
 834
 835                 nodes[3].node.handle_channel_reestablish(&nodes[2].node.get_our_node_id(), &reestablish_2[0]);
 836
 837                 // Once we call `get_and_clear_pending_msg_events` the holding cell is cleared and the HTLC
 838                 // claim should fly.
 839                 let ds_msgs = nodes[3].node.get_and_clear_pending_msg_events();
 840                 check_added_monitors!(nodes[3], 1);
 841                 assert_eq!(ds_msgs.len(), 2);
 842                 if let MessageSendEvent::SendChannelUpdate { .. } = ds_msgs[0] {} else { panic!(); }
 843
 844                 let cs_updates = match ds_msgs[1] {
 845                         MessageSendEvent::UpdateHTLCs { ref updates, .. } => {
 846                                 nodes[2].node.handle_update_fulfill_htlc(&nodes[3].node.get_our_node_id(), &updates.update_fulfill_htlcs[0]);
 847                                 check_added_monitors!(nodes[2], 1);
 848                                 let cs_updates = get_htlc_update_msgs!(nodes[2], nodes[0].node.get_our_node_id());
 849                                 expect_payment_forwarded!(nodes[2], nodes[0], nodes[3], Some(1000), false, false);
 850                                 commitment_signed_dance!(nodes[2], nodes[3], updates.commitment_signed, false, true);
 851                                 cs_updates
 852                         }
 853                         _ => panic!(),
 854                 };
 855
 856                 nodes[0].node.handle_update_fulfill_htlc(&nodes[2].node.get_our_node_id(), &cs_updates.update_fulfill_htlcs[0]);
 857                 commitment_signed_dance!(nodes[0], nodes[2], cs_updates.commitment_signed, false, true);
 858                 expect_payment_sent!(nodes[0], payment_preimage);
 859         }
 860 }
 861
 862 #[test]
 863 fn test_partial_claim_before_restart() {
 864         do_test_partial_claim_before_restart(false);
 865         do_test_partial_claim_before_restart(true);
 866 }
 867
 868 fn do_forwarded_payment_no_manager_persistence(use_cs_commitment: bool, claim_htlc: bool, use_intercept: bool) {
 869         if !use_cs_commitment { assert!(!claim_htlc); }
 870         // If we go to forward a payment, and the ChannelMonitor persistence completes, but the
 871         // ChannelManager does not, we shouldn't try to forward the payment again, nor should we fail
 872         // it back until the ChannelMonitor decides the fate of the HTLC.
 873         // This was never an issue, but it may be easy to regress here going forward.
 874         let chanmon_cfgs = create_chanmon_cfgs(3);
 875         let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
 876         let mut intercept_forwards_config = test_default_channel_config();
 877         intercept_forwards_config.accept_intercept_htlcs = true;
 878         let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[None, Some(intercept_forwards_config), None]);
 879
 880         let persister;
 881         let new_chain_monitor;
 882         let nodes_1_deserialized;
 883
 884         let mut nodes = create_network(3, &node_cfgs, &node_chanmgrs);
 885
 886         let chan_id_1 = create_announced_chan_between_nodes(&nodes, 0, 1).2;
 887         let chan_id_2 = create_announced_chan_between_nodes(&nodes, 1, 2).2;
 888
 889         let intercept_scid = nodes[1].node.get_intercept_scid();
 890
 891         let (mut route, payment_hash, payment_preimage, payment_secret) =
 892                 get_route_and_payment_hash!(nodes[0], nodes[2], 1_000_000);
 893         if use_intercept {
 894                 route.paths[0].hops[1].short_channel_id = intercept_scid;
 895         }
 896         let payment_id = PaymentId(nodes[0].keys_manager.backing.get_secure_random_bytes());
 897         let htlc_expiry = nodes[0].best_block_info().1 + TEST_FINAL_CLTV;
 898         nodes[0].node.send_payment_with_route(&route, payment_hash,
 899                 RecipientOnionFields::secret_only(payment_secret), payment_id).unwrap();
 900         check_added_monitors!(nodes[0], 1);
 901
 902         let payment_event = SendEvent::from_node(&nodes[0]);
 903         nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &payment_event.msgs[0]);
 904         commitment_signed_dance!(nodes[1], nodes[0], payment_event.commitment_msg, false);
 905
 906         // Store the `ChannelManager` before handling the `PendingHTLCsForwardable`/`HTLCIntercepted`
 907         // events, expecting either event (and the HTLC itself) to be missing on reload even though its
 908         // present when we serialized.
 909         let node_encoded = nodes[1].node.encode();
 910
 911         let mut intercept_id = None;
 912         let mut expected_outbound_amount_msat = None;
 913         if use_intercept {
 914                 let events = nodes[1].node.get_and_clear_pending_events();
 915                 assert_eq!(events.len(), 1);
 916                 match events[0] {
 917                         Event::HTLCIntercepted { intercept_id: ev_id, expected_outbound_amount_msat: ev_amt, .. } => {
 918                                 intercept_id = Some(ev_id);
 919                                 expected_outbound_amount_msat = Some(ev_amt);
 920                         },
 921                         _ => panic!()
 922                 }
 923                 nodes[1].node.forward_intercepted_htlc(intercept_id.unwrap(), &chan_id_2,
 924                         nodes[2].node.get_our_node_id(), expected_outbound_amount_msat.unwrap()).unwrap();
 925         }
 926
 927         expect_pending_htlcs_forwardable!(nodes[1]);
 928
 929         let payment_event = SendEvent::from_node(&nodes[1]);
 930         nodes[2].node.handle_update_add_htlc(&nodes[1].node.get_our_node_id(), &payment_event.msgs[0]);
 931         nodes[2].node.handle_commitment_signed(&nodes[1].node.get_our_node_id(), &payment_event.commitment_msg);
 932         check_added_monitors!(nodes[2], 1);
 933
 934         if claim_htlc {
 935                 get_monitor!(nodes[2], chan_id_2).provide_payment_preimage(&payment_hash, &payment_preimage,
 936                         &nodes[2].tx_broadcaster, &LowerBoundedFeeEstimator(nodes[2].fee_estimator), &nodes[2].logger);
 937         }
 938         assert!(nodes[2].tx_broadcaster.txn_broadcasted.lock().unwrap().is_empty());
 939
 940         let _ = nodes[2].node.get_and_clear_pending_msg_events();
 941
 942         nodes[2].node.force_close_broadcasting_latest_txn(&chan_id_2, &nodes[1].node.get_our_node_id()).unwrap();
 943         let cs_commitment_tx = nodes[2].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0);
 944         assert_eq!(cs_commitment_tx.len(), if claim_htlc { 2 } else { 1 });
 945
 946         check_added_monitors!(nodes[2], 1);
 947         check_closed_event!(nodes[2], 1, ClosureReason::HolderForceClosed);
 948         check_closed_broadcast!(nodes[2], true);
 949
 950         let chan_0_monitor_serialized = get_monitor!(nodes[1], chan_id_1).encode();
 951         let chan_1_monitor_serialized = get_monitor!(nodes[1], chan_id_2).encode();
 952         reload_node!(nodes[1], node_encoded, &[&chan_0_monitor_serialized, &chan_1_monitor_serialized], persister, new_chain_monitor, nodes_1_deserialized);
 953
 954         // Note that this checks that this is the only event on nodes[1], implying the
 955         // `HTLCIntercepted` event has been removed in the `use_intercept` case.
 956         check_closed_event!(nodes[1], 1, ClosureReason::OutdatedChannelManager);
 957
 958         if use_intercept {
 959                 // Attempt to forward the HTLC back out over nodes[1]' still-open channel, ensuring we get
 960                 // a intercept-doesn't-exist error.
 961                 let forward_err = nodes[1].node.forward_intercepted_htlc(intercept_id.unwrap(), &chan_id_1,
 962                         nodes[0].node.get_our_node_id(), expected_outbound_amount_msat.unwrap()).unwrap_err();
 963                 assert_eq!(forward_err, APIError::APIMisuseError {
 964                         err: format!("Payment with intercept id {} not found", log_bytes!(intercept_id.unwrap().0))
 965                 });
 966         }
 967
 968         nodes[1].node.timer_tick_occurred();
 969         let bs_commitment_tx = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0);
 970         assert_eq!(bs_commitment_tx.len(), 1);
 971         check_added_monitors!(nodes[1], 1);
 972
 973         nodes[0].node.peer_disconnected(&nodes[1].node.get_our_node_id());
 974         reconnect_nodes(ReconnectArgs::new(&nodes[0], &nodes[1]));
 975
 976         if use_cs_commitment {
 977                 // If we confirm a commitment transaction that has the HTLC on-chain, nodes[1] should wait
 978                 // for an HTLC-spending transaction before it does anything with the HTLC upstream.
 979                 confirm_transaction(&nodes[1], &cs_commitment_tx[0]);
 980                 assert!(nodes[1].node.get_and_clear_pending_events().is_empty());
 981                 assert!(nodes[1].node.get_and_clear_pending_msg_events().is_empty());
 982
 983                 if claim_htlc {
 984                         confirm_transaction(&nodes[1], &cs_commitment_tx[1]);
 985                 } else {
 986                         connect_blocks(&nodes[1], htlc_expiry - nodes[1].best_block_info().1 + 1);
 987                         let bs_htlc_timeout_tx = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0);
 988                         assert_eq!(bs_htlc_timeout_tx.len(), 1);
 989                         confirm_transaction(&nodes[1], &bs_htlc_timeout_tx[0]);
 990                 }
 991         } else {
 992                 confirm_transaction(&nodes[1], &bs_commitment_tx[0]);
 993         }
 994
 995         if !claim_htlc {
 996                 expect_pending_htlcs_forwardable_and_htlc_handling_failed!(nodes[1], [HTLCDestination::NextHopChannel { node_id: Some(nodes[2].node.get_our_node_id()), channel_id: chan_id_2 }]);
 997         } else {
 998                 expect_payment_forwarded!(nodes[1], nodes[0], nodes[2], Some(1000), false, true);
 999         }
1000         check_added_monitors!(nodes[1], 1);
1001
1002         let events = nodes[1].node.get_and_clear_pending_msg_events();
1003         assert_eq!(events.len(), 1);
1004         match &events[0] {
1005                 MessageSendEvent::UpdateHTLCs { updates: msgs::CommitmentUpdate { update_fulfill_htlcs, update_fail_htlcs, commitment_signed, .. }, .. } => {
1006                         if claim_htlc {
1007                                 nodes[0].node.handle_update_fulfill_htlc(&nodes[1].node.get_our_node_id(), &update_fulfill_htlcs[0]);
1008                         } else {
1009                                 nodes[0].node.handle_update_fail_htlc(&nodes[1].node.get_our_node_id(), &update_fail_htlcs[0]);
1010                         }
1011                         commitment_signed_dance!(nodes[0], nodes[1], commitment_signed, false);
1012                 },
1013                 _ => panic!("Unexpected event"),
1014         }
1015
1016         if claim_htlc {
1017                 expect_payment_sent!(nodes[0], payment_preimage);
1018         } else {
1019                 expect_payment_failed!(nodes[0], payment_hash, false);
1020         }
1021 }
1022
1023 #[test]
1024 fn forwarded_payment_no_manager_persistence() {
1025         do_forwarded_payment_no_manager_persistence(true, true, false);
1026         do_forwarded_payment_no_manager_persistence(true, false, false);
1027         do_forwarded_payment_no_manager_persistence(false, false, false);
1028 }
1029
1030 #[test]
1031 fn intercepted_payment_no_manager_persistence() {
1032         do_forwarded_payment_no_manager_persistence(true, true, true);
1033         do_forwarded_payment_no_manager_persistence(true, false, true);
1034         do_forwarded_payment_no_manager_persistence(false, false, true);
1035 }
1036
1037 #[test]
1038 fn removed_payment_no_manager_persistence() {
1039         // If an HTLC is failed to us on a channel, and the ChannelMonitor persistence completes, but
1040         // the corresponding ChannelManager persistence does not, we need to ensure that the HTLC is
1041         // still failed back to the previous hop even though the ChannelMonitor now no longer is aware
1042         // of the HTLC. This was previously broken as no attempt was made to figure out which HTLCs
1043         // were left dangling when a channel was force-closed due to a stale ChannelManager.
1044         let chanmon_cfgs = create_chanmon_cfgs(3);
1045         let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
1046         let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[None, None, None]);
1047
1048         let persister;
1049         let new_chain_monitor;
1050         let nodes_1_deserialized;
1051
1052         let mut nodes = create_network(3, &node_cfgs, &node_chanmgrs);
1053
1054         let chan_id_1 = create_announced_chan_between_nodes(&nodes, 0, 1).2;
1055         let chan_id_2 = create_announced_chan_between_nodes(&nodes, 1, 2).2;
1056
1057         let (_, payment_hash, _) = route_payment(&nodes[0], &[&nodes[1], &nodes[2]], 1_000_000);
1058
1059         let node_encoded = nodes[1].node.encode();
1060
1061         nodes[2].node.fail_htlc_backwards(&payment_hash);
1062         expect_pending_htlcs_forwardable_and_htlc_handling_failed!(nodes[2], [HTLCDestination::FailedPayment { payment_hash }]);
1063         check_added_monitors!(nodes[2], 1);
1064         let events = nodes[2].node.get_and_clear_pending_msg_events();
1065         assert_eq!(events.len(), 1);
1066         match &events[0] {
1067                 MessageSendEvent::UpdateHTLCs { updates: msgs::CommitmentUpdate { update_fail_htlcs, commitment_signed, .. }, .. } => {
1068                         nodes[1].node.handle_update_fail_htlc(&nodes[2].node.get_our_node_id(), &update_fail_htlcs[0]);
1069                         commitment_signed_dance!(nodes[1], nodes[2], commitment_signed, false);
1070                 },
1071                 _ => panic!("Unexpected event"),
1072         }
1073
1074         let chan_0_monitor_serialized = get_monitor!(nodes[1], chan_id_1).encode();
1075         let chan_1_monitor_serialized = get_monitor!(nodes[1], chan_id_2).encode();
1076         reload_node!(nodes[1], node_encoded, &[&chan_0_monitor_serialized, &chan_1_monitor_serialized], persister, new_chain_monitor, nodes_1_deserialized);
1077
1078         match nodes[1].node.pop_pending_event().unwrap() {
1079                 Event::ChannelClosed { ref reason, .. } => {
1080                         assert_eq!(*reason, ClosureReason::OutdatedChannelManager);
1081                 },
1082                 _ => panic!("Unexpected event"),
1083         }
1084
1085         nodes[1].node.test_process_background_events();
1086         check_added_monitors(&nodes[1], 1);
1087
1088         // Now that the ChannelManager has force-closed the channel which had the HTLC removed, it is
1089         // now forgotten everywhere. The ChannelManager should have, as a side-effect of reload,
1090         // learned that the HTLC is gone from the ChannelMonitor and added it to the to-fail-back set.
1091         nodes[0].node.peer_disconnected(&nodes[1].node.get_our_node_id());
1092         reconnect_nodes(ReconnectArgs::new(&nodes[0], &nodes[1]));
1093
1094         expect_pending_htlcs_forwardable_and_htlc_handling_failed!(nodes[1], [HTLCDestination::NextHopChannel { node_id: Some(nodes[2].node.get_our_node_id()), channel_id: chan_id_2 }]);
1095         check_added_monitors!(nodes[1], 1);
1096         let events = nodes[1].node.get_and_clear_pending_msg_events();
1097         assert_eq!(events.len(), 1);
1098         match &events[0] {
1099                 MessageSendEvent::UpdateHTLCs { updates: msgs::CommitmentUpdate { update_fail_htlcs, commitment_signed, .. }, .. } => {
1100                         nodes[0].node.handle_update_fail_htlc(&nodes[1].node.get_our_node_id(), &update_fail_htlcs[0]);
1101                         commitment_signed_dance!(nodes[0], nodes[1], commitment_signed, false);
1102                 },
1103                 _ => panic!("Unexpected event"),
1104         }
1105
1106         expect_payment_failed!(nodes[0], payment_hash, false);
1107 }