git.bitcoin.ninja 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, 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         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         expect_channel_pending_event(&node_a, &node_b.node.get_our_node_id());
 265         expect_channel_pending_event(&node_b, &node_a.node.get_our_node_id());
 266
 267         nodes.push(node_a);
 268         nodes.push(node_b);
 269
 270         // Start the de/seriailization process mid-channel creation to check that the channel manager will hold onto events that are serialized
 271         let chan_0_monitor_serialized = get_monitor!(nodes[0], bs_funding_signed.channel_id).encode();
 272         reload_node!(nodes[0], nodes[0].node.encode(), &[&chan_0_monitor_serialized], persister, new_chain_monitor, nodes_0_deserialized);
 273
 274         nodes[1].node.peer_disconnected(&nodes[0].node.get_our_node_id());
 275
 276         // After deserializing, make sure the funding_transaction is still held by the channel manager
 277         let events_4 = nodes[0].node.get_and_clear_pending_events();
 278         assert_eq!(events_4.len(), 0);
 279         assert_eq!(nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().len(), 1);
 280         assert_eq!(nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap()[0].txid(), funding_output.txid);
 281
 282         // Make sure the channel is functioning as though the de/serialization never happened
 283         assert_eq!(nodes[0].node.list_channels().len(), 1);
 284
 285         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();
 286         let reestablish_1 = get_chan_reestablish_msgs!(nodes[0], nodes[1]);
 287         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();
 288         let reestablish_2 = get_chan_reestablish_msgs!(nodes[1], nodes[0]);
 289
 290         nodes[1].node.handle_channel_reestablish(&nodes[0].node.get_our_node_id(), &reestablish_1[0]);
 291         assert!(nodes[1].node.get_and_clear_pending_msg_events().is_empty());
 292         nodes[0].node.handle_channel_reestablish(&nodes[1].node.get_our_node_id(), &reestablish_2[0]);
 293         assert!(nodes[0].node.get_and_clear_pending_msg_events().is_empty());
 294
 295         let (channel_ready, _) = create_chan_between_nodes_with_value_confirm(&nodes[0], &nodes[1], &tx);
 296         let (announcement, as_update, bs_update) = create_chan_between_nodes_with_value_b(&nodes[0], &nodes[1], &channel_ready);
 297         for node in nodes.iter() {
 298                 assert!(node.gossip_sync.handle_channel_announcement(&announcement).unwrap());
 299                 node.gossip_sync.handle_channel_update(&as_update).unwrap();
 300                 node.gossip_sync.handle_channel_update(&bs_update).unwrap();
 301         }
 302
 303         send_payment(&nodes[0], &[&nodes[1]], 1000000);
 304 }
 305
 306 #[test]
 307 fn test_simple_manager_serialize_deserialize() {
 308         let chanmon_cfgs = create_chanmon_cfgs(2);
 309         let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
 310         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
 311         let persister: test_utils::TestPersister;
 312         let new_chain_monitor: test_utils::TestChainMonitor;
 313         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>;
 314         let mut nodes = create_network(2, &node_cfgs, &node_chanmgrs);
 315         let chan_id = create_announced_chan_between_nodes(&nodes, 0, 1).2;
 316
 317         let (our_payment_preimage, _, _) = route_payment(&nodes[0], &[&nodes[1]], 1000000);
 318         let (_, our_payment_hash, _) = route_payment(&nodes[0], &[&nodes[1]], 1000000);
 319
 320         nodes[1].node.peer_disconnected(&nodes[0].node.get_our_node_id());
 321
 322         let chan_0_monitor_serialized = get_monitor!(nodes[0], chan_id).encode();
 323         reload_node!(nodes[0], nodes[0].node.encode(), &[&chan_0_monitor_serialized], persister, new_chain_monitor, nodes_0_deserialized);
 324
 325         reconnect_nodes(&nodes[0], &nodes[1], (false, false), (0, 0), (0, 0), (0, 0), (0, 0), (0, 0), (false, false));
 326
 327         fail_payment(&nodes[0], &[&nodes[1]], our_payment_hash);
 328         claim_payment(&nodes[0], &[&nodes[1]], our_payment_preimage);
 329 }
 330
 331 #[test]
 332 fn test_manager_serialize_deserialize_inconsistent_monitor() {
 333         // Test deserializing a ChannelManager with an out-of-date ChannelMonitor
 334         let chanmon_cfgs = create_chanmon_cfgs(4);
 335         let node_cfgs = create_node_cfgs(4, &chanmon_cfgs);
 336         let node_chanmgrs = create_node_chanmgrs(4, &node_cfgs, &[None, None, None, None]);
 337         let logger: test_utils::TestLogger;
 338         let fee_estimator: test_utils::TestFeeEstimator;
 339         let persister: test_utils::TestPersister;
 340         let new_chain_monitor: test_utils::TestChainMonitor;
 341         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>;
 342         let mut nodes = create_network(4, &node_cfgs, &node_chanmgrs);
 343         let chan_id_1 = create_announced_chan_between_nodes(&nodes, 0, 1).2;
 344         let chan_id_2 = create_announced_chan_between_nodes(&nodes, 2, 0).2;
 345         let (_, _, channel_id, funding_tx) = create_announced_chan_between_nodes(&nodes, 0, 3);
 346
 347         let mut node_0_stale_monitors_serialized = Vec::new();
 348         for chan_id_iter in &[chan_id_1, chan_id_2, channel_id] {
 349                 let mut writer = test_utils::TestVecWriter(Vec::new());
 350                 get_monitor!(nodes[0], chan_id_iter).write(&mut writer).unwrap();
 351                 node_0_stale_monitors_serialized.push(writer.0);
 352         }
 353
 354         let (our_payment_preimage, _, _) = route_payment(&nodes[2], &[&nodes[0], &nodes[1]], 1000000);
 355
 356         // Serialize the ChannelManager here, but the monitor we keep up-to-date
 357         let nodes_0_serialized = nodes[0].node.encode();
 358
 359         route_payment(&nodes[0], &[&nodes[3]], 1000000);
 360         nodes[1].node.peer_disconnected(&nodes[0].node.get_our_node_id());
 361         nodes[2].node.peer_disconnected(&nodes[0].node.get_our_node_id());
 362         nodes[3].node.peer_disconnected(&nodes[0].node.get_our_node_id());
 363
 364         // Now the ChannelMonitor (which is now out-of-sync with ChannelManager for channel w/
 365         // nodes[3])
 366         let mut node_0_monitors_serialized = Vec::new();
 367         for chan_id_iter in &[chan_id_1, chan_id_2, channel_id] {
 368                 node_0_monitors_serialized.push(get_monitor!(nodes[0], chan_id_iter).encode());
 369         }
 370
 371         logger = test_utils::TestLogger::new();
 372         fee_estimator = test_utils::TestFeeEstimator { sat_per_kw: Mutex::new(253) };
 373         persister = test_utils::TestPersister::new();
 374         let keys_manager = &chanmon_cfgs[0].keys_manager;
 375         new_chain_monitor = test_utils::TestChainMonitor::new(Some(nodes[0].chain_source), nodes[0].tx_broadcaster.clone(), &logger, &fee_estimator, &persister, keys_manager);
 376         nodes[0].chain_monitor = &new_chain_monitor;
 377
 378
 379         let mut node_0_stale_monitors = Vec::new();
 380         for serialized in node_0_stale_monitors_serialized.iter() {
 381                 let mut read = &serialized[..];
 382                 let (_, monitor) = <(BlockHash, ChannelMonitor<EnforcingSigner>)>::read(&mut read, (keys_manager, keys_manager)).unwrap();
 383                 assert!(read.is_empty());
 384                 node_0_stale_monitors.push(monitor);
 385         }
 386
 387         let mut node_0_monitors = Vec::new();
 388         for serialized in node_0_monitors_serialized.iter() {
 389                 let mut read = &serialized[..];
 390                 let (_, monitor) = <(BlockHash, ChannelMonitor<EnforcingSigner>)>::read(&mut read, (keys_manager, keys_manager)).unwrap();
 391                 assert!(read.is_empty());
 392                 node_0_monitors.push(monitor);
 393         }
 394
 395         let mut nodes_0_read = &nodes_0_serialized[..];
 396         if let Err(msgs::DecodeError::InvalidValue) =
 397                 <(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 {
 398                 default_config: UserConfig::default(),
 399                 entropy_source: keys_manager,
 400                 node_signer: keys_manager,
 401                 signer_provider: keys_manager,
 402                 fee_estimator: &fee_estimator,
 403                 router: &nodes[0].router,
 404                 chain_monitor: nodes[0].chain_monitor,
 405                 tx_broadcaster: nodes[0].tx_broadcaster.clone(),
 406                 logger: &logger,
 407                 channel_monitors: node_0_stale_monitors.iter_mut().map(|monitor| { (monitor.get_funding_txo().0, monitor) }).collect(),
 408         }) { } else {
 409                 panic!("If the monitor(s) are stale, this indicates a bug and we should get an Err return");
 410         };
 411
 412         let mut nodes_0_read = &nodes_0_serialized[..];
 413         let (_, nodes_0_deserialized_tmp) =
 414                 <(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 {
 415                 default_config: UserConfig::default(),
 416                 entropy_source: keys_manager,
 417                 node_signer: keys_manager,
 418                 signer_provider: keys_manager,
 419                 fee_estimator: &fee_estimator,
 420                 router: nodes[0].router,
 421                 chain_monitor: nodes[0].chain_monitor,
 422                 tx_broadcaster: nodes[0].tx_broadcaster.clone(),
 423                 logger: &logger,
 424                 channel_monitors: node_0_monitors.iter_mut().map(|monitor| { (monitor.get_funding_txo().0, monitor) }).collect(),
 425         }).unwrap();
 426         nodes_0_deserialized = nodes_0_deserialized_tmp;
 427         assert!(nodes_0_read.is_empty());
 428
 429         for monitor in node_0_monitors.drain(..) {
 430                 assert_eq!(nodes[0].chain_monitor.watch_channel(monitor.get_funding_txo().0, monitor),
 431                         ChannelMonitorUpdateStatus::Completed);
 432                 check_added_monitors!(nodes[0], 1);
 433         }
 434         nodes[0].node = &nodes_0_deserialized;
 435
 436         check_closed_event!(nodes[0], 1, ClosureReason::OutdatedChannelManager);
 437         { // Channel close should result in a commitment tx
 438                 nodes[0].node.timer_tick_occurred();
 439                 let txn = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap();
 440                 assert_eq!(txn.len(), 1);
 441                 check_spends!(txn[0], funding_tx);
 442                 assert_eq!(txn[0].input[0].previous_output.txid, funding_tx.txid());
 443         }
 444         check_added_monitors!(nodes[0], 1);
 445
 446         // nodes[1] and nodes[2] have no lost state with nodes[0]...
 447         reconnect_nodes(&nodes[0], &nodes[1], (false, false), (0, 0), (0, 0), (0, 0), (0, 0), (0, 0), (false, false));
 448         reconnect_nodes(&nodes[0], &nodes[2], (false, false), (0, 0), (0, 0), (0, 0), (0, 0), (0, 0), (false, false));
 449         //... and we can even still claim the payment!
 450         claim_payment(&nodes[2], &[&nodes[0], &nodes[1]], our_payment_preimage);
 451
 452         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();
 453         let reestablish = get_chan_reestablish_msgs!(nodes[3], nodes[0]).pop().unwrap();
 454         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();
 455         nodes[0].node.handle_channel_reestablish(&nodes[3].node.get_our_node_id(), &reestablish);
 456         let mut found_err = false;
 457         for msg_event in nodes[0].node.get_and_clear_pending_msg_events() {
 458                 if let MessageSendEvent::HandleError { ref action, .. } = msg_event {
 459                         match action {
 460                                 &ErrorAction::SendErrorMessage { ref msg } => {
 461                                         assert_eq!(msg.channel_id, channel_id);
 462                                         assert!(!found_err);
 463                                         found_err = true;
 464                                 },
 465                                 _ => panic!("Unexpected event!"),
 466                         }
 467                 }
 468         }
 469         assert!(found_err);
 470 }
 471
 472 fn do_test_data_loss_protect(reconnect_panicing: bool) {
 473         // When we get a data_loss_protect proving we're behind, we immediately panic as the
 474         // chain::Watch API requirements have been violated (e.g. the user restored from a backup). The
 475         // panic message informs the user they should force-close without broadcasting, which is tested
 476         // if `reconnect_panicing` is not set.
 477         let mut chanmon_cfgs = create_chanmon_cfgs(2);
 478         // We broadcast during Drop because chanmon is out of sync with chanmgr, which would cause a panic
 479         // during signing due to revoked tx
 480         chanmon_cfgs[0].keys_manager.disable_revocation_policy_check = true;
 481         let persister;
 482         let new_chain_monitor;
 483         let nodes_0_deserialized;
 484         let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
 485         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
 486         let mut nodes = create_network(2, &node_cfgs, &node_chanmgrs);
 487
 488         let chan = create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1000000, 1000000);
 489
 490         // Cache node A state before any channel update
 491         let previous_node_state = nodes[0].node.encode();
 492         let previous_chain_monitor_state = get_monitor!(nodes[0], chan.2).encode();
 493
 494         send_payment(&nodes[0], &vec!(&nodes[1])[..], 8000000);
 495         send_payment(&nodes[0], &vec!(&nodes[1])[..], 8000000);
 496
 497         nodes[0].node.peer_disconnected(&nodes[1].node.get_our_node_id());
 498         nodes[1].node.peer_disconnected(&nodes[0].node.get_our_node_id());
 499
 500         reload_node!(nodes[0], previous_node_state, &[&previous_chain_monitor_state], persister, new_chain_monitor, nodes_0_deserialized);
 501
 502         if reconnect_panicing {
 503                 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();
 504                 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();
 505
 506                 let reestablish_1 = get_chan_reestablish_msgs!(nodes[0], nodes[1]);
 507
 508                 // Check we close channel detecting A is fallen-behind
 509                 // Check that we sent the warning message when we detected that A has fallen behind,
 510                 // and give the possibility for A to recover from the warning.
 511                 nodes[1].node.handle_channel_reestablish(&nodes[0].node.get_our_node_id(), &reestablish_1[0]);
 512                 let warn_msg = "Peer attempted to reestablish channel with a very old local commitment transaction".to_owned();
 513                 assert!(check_warn_msg!(nodes[1], nodes[0].node.get_our_node_id(), chan.2).contains(&warn_msg));
 514
 515                 {
 516                         let mut node_txn = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().clone();
 517                         // The node B should not broadcast the transaction to force close the channel!
 518                         assert!(node_txn.is_empty());
 519                 }
 520
 521                 let reestablish_0 = get_chan_reestablish_msgs!(nodes[1], nodes[0]);
 522                 // Check A panics upon seeing proof it has fallen behind.
 523                 nodes[0].node.handle_channel_reestablish(&nodes[1].node.get_our_node_id(), &reestablish_0[0]);
 524                 return; // By this point we should have panic'ed!
 525         }
 526
 527         nodes[0].node.force_close_without_broadcasting_txn(&chan.2, &nodes[1].node.get_our_node_id()).unwrap();
 528         check_added_monitors!(nodes[0], 1);
 529         check_closed_event!(nodes[0], 1, ClosureReason::HolderForceClosed);
 530         {
 531                 let node_txn = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap();
 532                 assert_eq!(node_txn.len(), 0);
 533         }
 534
 535         for msg in nodes[0].node.get_and_clear_pending_msg_events() {
 536                 if let MessageSendEvent::BroadcastChannelUpdate { .. } = msg {
 537                 } else if let MessageSendEvent::HandleError { ref action, .. } = msg {
 538                         match action {
 539                                 &ErrorAction::SendErrorMessage { ref msg } => {
 540                                         assert_eq!(msg.data, "Channel force-closed");
 541                                 },
 542                                 _ => panic!("Unexpected event!"),
 543                         }
 544                 } else {
 545                         panic!("Unexpected event {:?}", msg)
 546                 }
 547         }
 548
 549         // after the warning message sent by B, we should not able to
 550         // use the channel, or reconnect with success to the channel.
 551         assert!(nodes[0].node.list_usable_channels().is_empty());
 552         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();
 553         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();
 554         let retry_reestablish = get_chan_reestablish_msgs!(nodes[1], nodes[0]);
 555
 556         nodes[0].node.handle_channel_reestablish(&nodes[1].node.get_our_node_id(), &retry_reestablish[0]);
 557         let mut err_msgs_0 = Vec::with_capacity(1);
 558         for msg in nodes[0].node.get_and_clear_pending_msg_events() {
 559                 if let MessageSendEvent::HandleError { ref action, .. } = msg {
 560                         match action {
 561                                 &ErrorAction::SendErrorMessage { ref msg } => {
 562                                         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()));
 563                                         err_msgs_0.push(msg.clone());
 564                                 },
 565                                 _ => panic!("Unexpected event!"),
 566                         }
 567                 } else {
 568                         panic!("Unexpected event!");
 569                 }
 570         }
 571         assert_eq!(err_msgs_0.len(), 1);
 572         nodes[1].node.handle_error(&nodes[0].node.get_our_node_id(), &err_msgs_0[0]);
 573         assert!(nodes[1].node.list_usable_channels().is_empty());
 574         check_added_monitors!(nodes[1], 1);
 575         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())) });
 576         check_closed_broadcast!(nodes[1], false);
 577 }
 578
 579 #[test]
 580 #[should_panic]
 581 fn test_data_loss_protect_showing_stale_state_panics() {
 582         do_test_data_loss_protect(true);
 583 }
 584
 585 #[test]
 586 fn test_force_close_without_broadcast() {
 587         do_test_data_loss_protect(false);
 588 }
 589
 590 #[test]
 591 fn test_forwardable_regen() {
 592         // Tests that if we reload a ChannelManager while forwards are pending we will regenerate the
 593         // PendingHTLCsForwardable event automatically, ensuring we don't forget to forward/receive
 594         // HTLCs.
 595         // We test it for both payment receipt and payment forwarding.
 596
 597         let chanmon_cfgs = create_chanmon_cfgs(3);
 598         let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
 599         let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[None, None, None]);
 600         let persister: test_utils::TestPersister;
 601         let new_chain_monitor: test_utils::TestChainMonitor;
 602         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>;
 603         let mut nodes = create_network(3, &node_cfgs, &node_chanmgrs);
 604         let chan_id_1 = create_announced_chan_between_nodes(&nodes, 0, 1).2;
 605         let chan_id_2 = create_announced_chan_between_nodes(&nodes, 1, 2).2;
 606
 607         // First send a payment to nodes[1]
 608         let (route, payment_hash, payment_preimage, payment_secret) = get_route_and_payment_hash!(nodes[0], nodes[1], 100_000);
 609         nodes[0].node.send_payment_with_route(&route, payment_hash,
 610                 RecipientOnionFields::secret_only(payment_secret), PaymentId(payment_hash.0)).unwrap();
 611         check_added_monitors!(nodes[0], 1);
 612
 613         let mut events = nodes[0].node.get_and_clear_pending_msg_events();
 614         assert_eq!(events.len(), 1);
 615         let payment_event = SendEvent::from_event(events.pop().unwrap());
 616         nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &payment_event.msgs[0]);
 617         commitment_signed_dance!(nodes[1], nodes[0], payment_event.commitment_msg, false);
 618
 619         expect_pending_htlcs_forwardable_ignore!(nodes[1]);
 620
 621         // Next send a payment which is forwarded by nodes[1]
 622         let (route_2, payment_hash_2, payment_preimage_2, payment_secret_2) = get_route_and_payment_hash!(nodes[0], nodes[2], 200_000);
 623         nodes[0].node.send_payment_with_route(&route_2, payment_hash_2,
 624                 RecipientOnionFields::secret_only(payment_secret_2), PaymentId(payment_hash_2.0)).unwrap();
 625         check_added_monitors!(nodes[0], 1);
 626
 627         let mut events = nodes[0].node.get_and_clear_pending_msg_events();
 628         assert_eq!(events.len(), 1);
 629         let payment_event = SendEvent::from_event(events.pop().unwrap());
 630         nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &payment_event.msgs[0]);
 631         commitment_signed_dance!(nodes[1], nodes[0], payment_event.commitment_msg, false);
 632
 633         // There is already a PendingHTLCsForwardable event "pending" so another one will not be
 634         // generated
 635         assert!(nodes[1].node.get_and_clear_pending_events().is_empty());
 636
 637         // Now restart nodes[1] and make sure it regenerates a single PendingHTLCsForwardable
 638         nodes[0].node.peer_disconnected(&nodes[1].node.get_our_node_id());
 639         nodes[2].node.peer_disconnected(&nodes[1].node.get_our_node_id());
 640
 641         let chan_0_monitor_serialized = get_monitor!(nodes[1], chan_id_1).encode();
 642         let chan_1_monitor_serialized = get_monitor!(nodes[1], chan_id_2).encode();
 643         reload_node!(nodes[1], nodes[1].node.encode(), &[&chan_0_monitor_serialized, &chan_1_monitor_serialized], persister, new_chain_monitor, nodes_1_deserialized);
 644
 645         reconnect_nodes(&nodes[0], &nodes[1], (false, false), (0, 0), (0, 0), (0, 0), (0, 0), (0, 0), (false, false));
 646         // Note that nodes[1] and nodes[2] resend their channel_ready here since they haven't updated
 647         // the commitment state.
 648         reconnect_nodes(&nodes[1], &nodes[2], (true, true), (0, 0), (0, 0), (0, 0), (0, 0), (0, 0), (false, false));
 649
 650         assert!(nodes[1].node.get_and_clear_pending_msg_events().is_empty());
 651
 652         expect_pending_htlcs_forwardable!(nodes[1]);
 653         expect_payment_claimable!(nodes[1], payment_hash, payment_secret, 100_000);
 654         check_added_monitors!(nodes[1], 1);
 655
 656         let mut events = nodes[1].node.get_and_clear_pending_msg_events();
 657         assert_eq!(events.len(), 1);
 658         let payment_event = SendEvent::from_event(events.pop().unwrap());
 659         nodes[2].node.handle_update_add_htlc(&nodes[1].node.get_our_node_id(), &payment_event.msgs[0]);
 660         commitment_signed_dance!(nodes[2], nodes[1], payment_event.commitment_msg, false);
 661         expect_pending_htlcs_forwardable!(nodes[2]);
 662         expect_payment_claimable!(nodes[2], payment_hash_2, payment_secret_2, 200_000);
 663
 664         claim_payment(&nodes[0], &[&nodes[1]], payment_preimage);
 665         claim_payment(&nodes[0], &[&nodes[1], &nodes[2]], payment_preimage_2);
 666 }
 667
 668 fn do_test_partial_claim_before_restart(persist_both_monitors: bool) {
 669         // Test what happens if a node receives an MPP payment, claims it, but crashes before
 670         // persisting the ChannelManager. If `persist_both_monitors` is false, also crash after only
 671         // updating one of the two channels' ChannelMonitors. As a result, on startup, we'll (a) still
 672         // have the PaymentClaimable event, (b) have one (or two) channel(s) that goes on chain with the
 673         // HTLC preimage in them, and (c) optionally have one channel that is live off-chain but does
 674         // not have the preimage tied to the still-pending HTLC.
 675         //
 676         // To get to the correct state, on startup we should propagate the preimage to the
 677         // still-off-chain channel, claiming the HTLC as soon as the peer connects, with the monitor
 678         // receiving the preimage without a state update.
 679         //
 680         // Further, we should generate a `PaymentClaimed` event to inform the user that the payment was
 681         // definitely claimed.
 682         let chanmon_cfgs = create_chanmon_cfgs(4);
 683         let node_cfgs = create_node_cfgs(4, &chanmon_cfgs);
 684         let node_chanmgrs = create_node_chanmgrs(4, &node_cfgs, &[None, None, None, None]);
 685
 686         let persister: test_utils::TestPersister;
 687         let new_chain_monitor: test_utils::TestChainMonitor;
 688         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>;
 689
 690         let mut nodes = create_network(4, &node_cfgs, &node_chanmgrs);
 691
 692         create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 100_000, 0);
 693         create_announced_chan_between_nodes_with_value(&nodes, 0, 2, 100_000, 0);
 694         let chan_id_persisted = create_announced_chan_between_nodes_with_value(&nodes, 1, 3, 100_000, 0).2;
 695         let chan_id_not_persisted = create_announced_chan_between_nodes_with_value(&nodes, 2, 3, 100_000, 0).2;
 696
 697         // Create an MPP route for 15k sats, more than the default htlc-max of 10%
 698         let (mut route, payment_hash, payment_preimage, payment_secret) = get_route_and_payment_hash!(nodes[0], nodes[3], 15_000_000);
 699         assert_eq!(route.paths.len(), 2);
 700         route.paths.sort_by(|path_a, _| {
 701                 // Sort the path so that the path through nodes[1] comes first
 702                 if path_a[0].pubkey == nodes[1].node.get_our_node_id() {
 703                         core::cmp::Ordering::Less } else { core::cmp::Ordering::Greater }
 704         });
 705
 706         nodes[0].node.send_payment_with_route(&route, payment_hash,
 707                 RecipientOnionFields::secret_only(payment_secret), PaymentId(payment_hash.0)).unwrap();
 708         check_added_monitors!(nodes[0], 2);
 709
 710         // Send the payment through to nodes[3] *without* clearing the PaymentClaimable event
 711         let mut send_events = nodes[0].node.get_and_clear_pending_msg_events();
 712         assert_eq!(send_events.len(), 2);
 713         let node_1_msgs = remove_first_msg_event_to_node(&nodes[1].node.get_our_node_id(), &mut send_events);
 714         let node_2_msgs = remove_first_msg_event_to_node(&nodes[2].node.get_our_node_id(), &mut send_events);
 715         do_pass_along_path(&nodes[0], &[&nodes[1], &nodes[3]], 15_000_000, payment_hash, Some(payment_secret), node_1_msgs, true, false, None);
 716         do_pass_along_path(&nodes[0], &[&nodes[2], &nodes[3]], 15_000_000, payment_hash, Some(payment_secret), node_2_msgs, true, false, None);
 717
 718         // Now that we have an MPP payment pending, get the latest encoded copies of nodes[3]'s
 719         // monitors and ChannelManager, for use later, if we don't want to persist both monitors.
 720         let mut original_monitor = test_utils::TestVecWriter(Vec::new());
 721         if !persist_both_monitors {
 722                 for outpoint in nodes[3].chain_monitor.chain_monitor.list_monitors() {
 723                         if outpoint.to_channel_id() == chan_id_not_persisted {
 724                                 assert!(original_monitor.0.is_empty());
 725                                 nodes[3].chain_monitor.chain_monitor.get_monitor(outpoint).unwrap().write(&mut original_monitor).unwrap();
 726                         }
 727                 }
 728         }
 729
 730         let original_manager = nodes[3].node.encode();
 731
 732         expect_payment_claimable!(nodes[3], payment_hash, payment_secret, 15_000_000);
 733
 734         nodes[3].node.claim_funds(payment_preimage);
 735         check_added_monitors!(nodes[3], 2);
 736         expect_payment_claimed!(nodes[3], payment_hash, 15_000_000);
 737
 738         // Now fetch one of the two updated ChannelMonitors from nodes[3], and restart pretending we
 739         // crashed in between the two persistence calls - using one old ChannelMonitor and one new one,
 740         // with the old ChannelManager.
 741         let mut updated_monitor = test_utils::TestVecWriter(Vec::new());
 742         for outpoint in nodes[3].chain_monitor.chain_monitor.list_monitors() {
 743                 if outpoint.to_channel_id() == chan_id_persisted {
 744                         assert!(updated_monitor.0.is_empty());
 745                         nodes[3].chain_monitor.chain_monitor.get_monitor(outpoint).unwrap().write(&mut updated_monitor).unwrap();
 746                 }
 747         }
 748         // If `persist_both_monitors` is set, get the second monitor here as well
 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         // Now restart nodes[3].
 759         reload_node!(nodes[3], original_manager, &[&updated_monitor.0, &original_monitor.0], persister, new_chain_monitor, nodes_3_deserialized);
 760
 761         // On startup the preimage should have been copied into the non-persisted monitor:
 762         assert!(get_monitor!(nodes[3], chan_id_persisted).get_stored_preimages().contains_key(&payment_hash));
 763         assert!(get_monitor!(nodes[3], chan_id_not_persisted).get_stored_preimages().contains_key(&payment_hash));
 764
 765         nodes[1].node.peer_disconnected(&nodes[3].node.get_our_node_id());
 766         nodes[2].node.peer_disconnected(&nodes[3].node.get_our_node_id());
 767
 768         // During deserialization, we should have closed one channel and broadcast its latest
 769         // commitment transaction. We should also still have the original PaymentClaimable event we
 770         // never finished processing.
 771         let events = nodes[3].node.get_and_clear_pending_events();
 772         assert_eq!(events.len(), if persist_both_monitors { 4 } else { 3 });
 773         if let Event::PaymentClaimable { amount_msat: 15_000_000, .. } = events[0] { } else { panic!(); }
 774         if let Event::ChannelClosed { reason: ClosureReason::OutdatedChannelManager, .. } = events[1] { } else { panic!(); }
 775         if persist_both_monitors {
 776                 if let Event::ChannelClosed { reason: ClosureReason::OutdatedChannelManager, .. } = events[2] { } else { panic!(); }
 777         }
 778
 779         // On restart, we should also get a duplicate PaymentClaimed event as we persisted the
 780         // ChannelManager prior to handling the original one.
 781         if let Event::PaymentClaimed { payment_hash: our_payment_hash, amount_msat: 15_000_000, .. } =
 782                 events[if persist_both_monitors { 3 } else { 2 }]
 783         {
 784                 assert_eq!(payment_hash, our_payment_hash);
 785         } else { panic!(); }
 786
 787         assert_eq!(nodes[3].node.list_channels().len(), if persist_both_monitors { 0 } else { 1 });
 788         if !persist_both_monitors {
 789                 // If one of the two channels is still live, reveal the payment preimage over it.
 790
 791                 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();
 792                 let reestablish_1 = get_chan_reestablish_msgs!(nodes[3], nodes[2]);
 793                 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();
 794                 let reestablish_2 = get_chan_reestablish_msgs!(nodes[2], nodes[3]);
 795
 796                 nodes[2].node.handle_channel_reestablish(&nodes[3].node.get_our_node_id(), &reestablish_1[0]);
 797                 get_event_msg!(nodes[2], MessageSendEvent::SendChannelUpdate, nodes[3].node.get_our_node_id());
 798                 assert!(nodes[2].node.get_and_clear_pending_msg_events().is_empty());
 799
 800                 nodes[3].node.handle_channel_reestablish(&nodes[2].node.get_our_node_id(), &reestablish_2[0]);
 801
 802                 // Once we call `get_and_clear_pending_msg_events` the holding cell is cleared and the HTLC
 803                 // claim should fly.
 804                 let ds_msgs = nodes[3].node.get_and_clear_pending_msg_events();
 805                 check_added_monitors!(nodes[3], 1);
 806                 assert_eq!(ds_msgs.len(), 2);
 807                 if let MessageSendEvent::SendChannelUpdate { .. } = ds_msgs[0] {} else { panic!(); }
 808
 809                 let cs_updates = match ds_msgs[1] {
 810                         MessageSendEvent::UpdateHTLCs { ref updates, .. } => {
 811                                 nodes[2].node.handle_update_fulfill_htlc(&nodes[3].node.get_our_node_id(), &updates.update_fulfill_htlcs[0]);
 812                                 check_added_monitors!(nodes[2], 1);
 813                                 let cs_updates = get_htlc_update_msgs!(nodes[2], nodes[0].node.get_our_node_id());
 814                                 expect_payment_forwarded!(nodes[2], nodes[0], nodes[3], Some(1000), false, false);
 815                                 commitment_signed_dance!(nodes[2], nodes[3], updates.commitment_signed, false, true);
 816                                 cs_updates
 817                         }
 818                         _ => panic!(),
 819                 };
 820
 821                 nodes[0].node.handle_update_fulfill_htlc(&nodes[2].node.get_our_node_id(), &cs_updates.update_fulfill_htlcs[0]);
 822                 commitment_signed_dance!(nodes[0], nodes[2], cs_updates.commitment_signed, false, true);
 823                 expect_payment_sent!(nodes[0], payment_preimage);
 824         }
 825 }
 826
 827 #[test]
 828 fn test_partial_claim_before_restart() {
 829         do_test_partial_claim_before_restart(false);
 830         do_test_partial_claim_before_restart(true);
 831 }
 832
 833 fn do_forwarded_payment_no_manager_persistence(use_cs_commitment: bool, claim_htlc: bool, use_intercept: bool) {
 834         if !use_cs_commitment { assert!(!claim_htlc); }
 835         // If we go to forward a payment, and the ChannelMonitor persistence completes, but the
 836         // ChannelManager does not, we shouldn't try to forward the payment again, nor should we fail
 837         // it back until the ChannelMonitor decides the fate of the HTLC.
 838         // This was never an issue, but it may be easy to regress here going forward.
 839         let chanmon_cfgs = create_chanmon_cfgs(3);
 840         let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
 841         let mut intercept_forwards_config = test_default_channel_config();
 842         intercept_forwards_config.accept_intercept_htlcs = true;
 843         let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[None, Some(intercept_forwards_config), None]);
 844
 845         let persister;
 846         let new_chain_monitor;
 847         let nodes_1_deserialized;
 848
 849         let mut nodes = create_network(3, &node_cfgs, &node_chanmgrs);
 850
 851         let chan_id_1 = create_announced_chan_between_nodes(&nodes, 0, 1).2;
 852         let chan_id_2 = create_announced_chan_between_nodes(&nodes, 1, 2).2;
 853
 854         let intercept_scid = nodes[1].node.get_intercept_scid();
 855
 856         let (mut route, payment_hash, payment_preimage, payment_secret) =
 857                 get_route_and_payment_hash!(nodes[0], nodes[2], 1_000_000);
 858         if use_intercept {
 859                 route.paths[0][1].short_channel_id = intercept_scid;
 860         }
 861         let payment_id = PaymentId(nodes[0].keys_manager.backing.get_secure_random_bytes());
 862         let htlc_expiry = nodes[0].best_block_info().1 + TEST_FINAL_CLTV;
 863         nodes[0].node.send_payment_with_route(&route, payment_hash,
 864                 RecipientOnionFields::secret_only(payment_secret), payment_id).unwrap();
 865         check_added_monitors!(nodes[0], 1);
 866
 867         let payment_event = SendEvent::from_node(&nodes[0]);
 868         nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &payment_event.msgs[0]);
 869         commitment_signed_dance!(nodes[1], nodes[0], payment_event.commitment_msg, false);
 870
 871         // Store the `ChannelManager` before handling the `PendingHTLCsForwardable`/`HTLCIntercepted`
 872         // events, expecting either event (and the HTLC itself) to be missing on reload even though its
 873         // present when we serialized.
 874         let node_encoded = nodes[1].node.encode();
 875
 876         let mut intercept_id = None;
 877         let mut expected_outbound_amount_msat = None;
 878         if use_intercept {
 879                 let events = nodes[1].node.get_and_clear_pending_events();
 880                 assert_eq!(events.len(), 1);
 881                 match events[0] {
 882                         Event::HTLCIntercepted { intercept_id: ev_id, expected_outbound_amount_msat: ev_amt, .. } => {
 883                                 intercept_id = Some(ev_id);
 884                                 expected_outbound_amount_msat = Some(ev_amt);
 885                         },
 886                         _ => panic!()
 887                 }
 888                 nodes[1].node.forward_intercepted_htlc(intercept_id.unwrap(), &chan_id_2,
 889                         nodes[2].node.get_our_node_id(), expected_outbound_amount_msat.unwrap()).unwrap();
 890         }
 891
 892         expect_pending_htlcs_forwardable!(nodes[1]);
 893
 894         let payment_event = SendEvent::from_node(&nodes[1]);
 895         nodes[2].node.handle_update_add_htlc(&nodes[1].node.get_our_node_id(), &payment_event.msgs[0]);
 896         nodes[2].node.handle_commitment_signed(&nodes[1].node.get_our_node_id(), &payment_event.commitment_msg);
 897         check_added_monitors!(nodes[2], 1);
 898
 899         if claim_htlc {
 900                 get_monitor!(nodes[2], chan_id_2).provide_payment_preimage(&payment_hash, &payment_preimage,
 901                         &nodes[2].tx_broadcaster, &LowerBoundedFeeEstimator(nodes[2].fee_estimator), &nodes[2].logger);
 902         }
 903         assert!(nodes[2].tx_broadcaster.txn_broadcasted.lock().unwrap().is_empty());
 904
 905         let _ = nodes[2].node.get_and_clear_pending_msg_events();
 906
 907         nodes[2].node.force_close_broadcasting_latest_txn(&chan_id_2, &nodes[1].node.get_our_node_id()).unwrap();
 908         let cs_commitment_tx = nodes[2].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0);
 909         assert_eq!(cs_commitment_tx.len(), if claim_htlc { 2 } else { 1 });
 910
 911         check_added_monitors!(nodes[2], 1);
 912         check_closed_event!(nodes[2], 1, ClosureReason::HolderForceClosed);
 913         check_closed_broadcast!(nodes[2], true);
 914
 915         let chan_0_monitor_serialized = get_monitor!(nodes[1], chan_id_1).encode();
 916         let chan_1_monitor_serialized = get_monitor!(nodes[1], chan_id_2).encode();
 917         reload_node!(nodes[1], node_encoded, &[&chan_0_monitor_serialized, &chan_1_monitor_serialized], persister, new_chain_monitor, nodes_1_deserialized);
 918
 919         // Note that this checks that this is the only event on nodes[1], implying the
 920         // `HTLCIntercepted` event has been removed in the `use_intercept` case.
 921         check_closed_event!(nodes[1], 1, ClosureReason::OutdatedChannelManager);
 922
 923         if use_intercept {
 924                 // Attempt to forward the HTLC back out over nodes[1]' still-open channel, ensuring we get
 925                 // a intercept-doesn't-exist error.
 926                 let forward_err = nodes[1].node.forward_intercepted_htlc(intercept_id.unwrap(), &chan_id_1,
 927                         nodes[0].node.get_our_node_id(), expected_outbound_amount_msat.unwrap()).unwrap_err();
 928                 assert_eq!(forward_err, APIError::APIMisuseError {
 929                         err: format!("Payment with intercept id {} not found", log_bytes!(intercept_id.unwrap().0))
 930                 });
 931         }
 932
 933         nodes[1].node.timer_tick_occurred();
 934         let bs_commitment_tx = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0);
 935         assert_eq!(bs_commitment_tx.len(), 1);
 936         check_added_monitors!(nodes[1], 1);
 937
 938         nodes[0].node.peer_disconnected(&nodes[1].node.get_our_node_id());
 939         reconnect_nodes(&nodes[0], &nodes[1], (false, false), (0, 0), (0, 0), (0, 0), (0, 0), (0, 0), (false, false));
 940
 941         if use_cs_commitment {
 942                 // If we confirm a commitment transaction that has the HTLC on-chain, nodes[1] should wait
 943                 // for an HTLC-spending transaction before it does anything with the HTLC upstream.
 944                 confirm_transaction(&nodes[1], &cs_commitment_tx[0]);
 945                 assert!(nodes[1].node.get_and_clear_pending_events().is_empty());
 946                 assert!(nodes[1].node.get_and_clear_pending_msg_events().is_empty());
 947
 948                 if claim_htlc {
 949                         confirm_transaction(&nodes[1], &cs_commitment_tx[1]);
 950                 } else {
 951                         connect_blocks(&nodes[1], htlc_expiry - nodes[1].best_block_info().1);
 952                         let bs_htlc_timeout_tx = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0);
 953                         assert_eq!(bs_htlc_timeout_tx.len(), 1);
 954                         confirm_transaction(&nodes[1], &bs_htlc_timeout_tx[0]);
 955                 }
 956         } else {
 957                 confirm_transaction(&nodes[1], &bs_commitment_tx[0]);
 958         }
 959
 960         if !claim_htlc {
 961                 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 }]);
 962         } else {
 963                 expect_payment_forwarded!(nodes[1], nodes[0], nodes[2], Some(1000), false, true);
 964         }
 965         check_added_monitors!(nodes[1], 1);
 966
 967         let events = nodes[1].node.get_and_clear_pending_msg_events();
 968         assert_eq!(events.len(), 1);
 969         match &events[0] {
 970                 MessageSendEvent::UpdateHTLCs { updates: msgs::CommitmentUpdate { update_fulfill_htlcs, update_fail_htlcs, commitment_signed, .. }, .. } => {
 971                         if claim_htlc {
 972                                 nodes[0].node.handle_update_fulfill_htlc(&nodes[1].node.get_our_node_id(), &update_fulfill_htlcs[0]);
 973                         } else {
 974                                 nodes[0].node.handle_update_fail_htlc(&nodes[1].node.get_our_node_id(), &update_fail_htlcs[0]);
 975                         }
 976                         commitment_signed_dance!(nodes[0], nodes[1], commitment_signed, false);
 977                 },
 978                 _ => panic!("Unexpected event"),
 979         }
 980
 981         if claim_htlc {
 982                 expect_payment_sent!(nodes[0], payment_preimage);
 983         } else {
 984                 expect_payment_failed!(nodes[0], payment_hash, false);
 985         }
 986 }
 987
 988 #[test]
 989 fn forwarded_payment_no_manager_persistence() {
 990         do_forwarded_payment_no_manager_persistence(true, true, false);
 991         do_forwarded_payment_no_manager_persistence(true, false, false);
 992         do_forwarded_payment_no_manager_persistence(false, false, false);
 993 }
 994
 995 #[test]
 996 fn intercepted_payment_no_manager_persistence() {
 997         do_forwarded_payment_no_manager_persistence(true, true, true);
 998         do_forwarded_payment_no_manager_persistence(true, false, true);
 999         do_forwarded_payment_no_manager_persistence(false, false, true);
1000 }
1001
1002 #[test]
1003 fn removed_payment_no_manager_persistence() {
1004         // If an HTLC is failed to us on a channel, and the ChannelMonitor persistence completes, but
1005         // the corresponding ChannelManager persistence does not, we need to ensure that the HTLC is
1006         // still failed back to the previous hop even though the ChannelMonitor now no longer is aware
1007         // of the HTLC. This was previously broken as no attempt was made to figure out which HTLCs
1008         // were left dangling when a channel was force-closed due to a stale ChannelManager.
1009         let chanmon_cfgs = create_chanmon_cfgs(3);
1010         let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
1011         let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[None, None, None]);
1012
1013         let persister;
1014         let new_chain_monitor;
1015         let nodes_1_deserialized;
1016
1017         let mut nodes = create_network(3, &node_cfgs, &node_chanmgrs);
1018
1019         let chan_id_1 = create_announced_chan_between_nodes(&nodes, 0, 1).2;
1020         let chan_id_2 = create_announced_chan_between_nodes(&nodes, 1, 2).2;
1021
1022         let (_, payment_hash, _) = route_payment(&nodes[0], &[&nodes[1], &nodes[2]], 1_000_000);
1023
1024         let node_encoded = nodes[1].node.encode();
1025
1026         nodes[2].node.fail_htlc_backwards(&payment_hash);
1027         expect_pending_htlcs_forwardable_and_htlc_handling_failed!(nodes[2], [HTLCDestination::FailedPayment { payment_hash }]);
1028         check_added_monitors!(nodes[2], 1);
1029         let events = nodes[2].node.get_and_clear_pending_msg_events();
1030         assert_eq!(events.len(), 1);
1031         match &events[0] {
1032                 MessageSendEvent::UpdateHTLCs { updates: msgs::CommitmentUpdate { update_fail_htlcs, commitment_signed, .. }, .. } => {
1033                         nodes[1].node.handle_update_fail_htlc(&nodes[2].node.get_our_node_id(), &update_fail_htlcs[0]);
1034                         commitment_signed_dance!(nodes[1], nodes[2], commitment_signed, false);
1035                 },
1036                 _ => panic!("Unexpected event"),
1037         }
1038
1039         let chan_0_monitor_serialized = get_monitor!(nodes[1], chan_id_1).encode();
1040         let chan_1_monitor_serialized = get_monitor!(nodes[1], chan_id_2).encode();
1041         reload_node!(nodes[1], node_encoded, &[&chan_0_monitor_serialized, &chan_1_monitor_serialized], persister, new_chain_monitor, nodes_1_deserialized);
1042
1043         match nodes[1].node.pop_pending_event().unwrap() {
1044                 Event::ChannelClosed { ref reason, .. } => {
1045                         assert_eq!(*reason, ClosureReason::OutdatedChannelManager);
1046                 },
1047                 _ => panic!("Unexpected event"),
1048         }
1049
1050         // Now that the ChannelManager has force-closed the channel which had the HTLC removed, it is
1051         // now forgotten everywhere. The ChannelManager should have, as a side-effect of reload,
1052         // learned that the HTLC is gone from the ChannelMonitor and added it to the to-fail-back set.
1053         nodes[0].node.peer_disconnected(&nodes[1].node.get_our_node_id());
1054         reconnect_nodes(&nodes[0], &nodes[1], (false, false), (0, 0), (0, 0), (0, 0), (0, 0), (0, 0), (false, false));
1055
1056         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 }]);
1057         check_added_monitors!(nodes[1], 1);
1058         let events = nodes[1].node.get_and_clear_pending_msg_events();
1059         assert_eq!(events.len(), 1);
1060         match &events[0] {
1061                 MessageSendEvent::UpdateHTLCs { updates: msgs::CommitmentUpdate { update_fail_htlcs, commitment_signed, .. }, .. } => {
1062                         nodes[0].node.handle_update_fail_htlc(&nodes[1].node.get_our_node_id(), &update_fail_htlcs[0]);
1063                         commitment_signed_dance!(nodes[0], nodes[1], commitment_signed, false);
1064                 },
1065                 _ => panic!("Unexpected event"),
1066         }
1067
1068         expect_payment_failed!(nodes[0], payment_hash, false);
1069 }