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