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

   1 // This file is Copyright its original authors, visible in version control
   2 // history.
   3 //
   4 // This file is licensed under the Apache License, Version 2.0 <LICENSE-APACHE
   5 // or http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   6 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your option.
   7 // You may not use this file except in accordance with one or both of these
   8 // licenses.
   9
  10 //! Tests that test the payment retry logic in ChannelManager, including various edge-cases around
  11 //! serialization ordering between ChannelManager/ChannelMonitors and ensuring we can still retry
  12 //! payments thereafter.
  13
  14 use chain::{ChannelMonitorUpdateErr, Confirm, Listen, Watch};
  15 use chain::channelmonitor::{ANTI_REORG_DELAY, ChannelMonitor, LATENCY_GRACE_PERIOD_BLOCKS};
  16 use chain::transaction::OutPoint;
  17 use chain::keysinterface::KeysInterface;
  18 use ln::channel::EXPIRE_PREV_CONFIG_TICKS;
  19 use ln::channelmanager::{BREAKDOWN_TIMEOUT, ChannelManager, ChannelManagerReadArgs, MPP_TIMEOUT_TICKS, PaymentId, PaymentSendFailure};
  20 use ln::features::{InitFeatures, InvoiceFeatures};
  21 use ln::msgs;
  22 use ln::msgs::ChannelMessageHandler;
  23 use routing::router::{PaymentParameters, get_route};
  24 use util::events::{ClosureReason, Event, MessageSendEvent, MessageSendEventsProvider};
  25 use util::test_utils;
  26 use util::errors::APIError;
  27 use util::enforcing_trait_impls::EnforcingSigner;
  28 use util::ser::{ReadableArgs, Writeable};
  29 use io;
  30
  31 use bitcoin::{Block, BlockHeader, BlockHash};
  32 use bitcoin::network::constants::Network;
  33
  34 use prelude::*;
  35
  36 use ln::functional_test_utils::*;
  37
  38 #[test]
  39 fn retry_single_path_payment() {
  40         let chanmon_cfgs = create_chanmon_cfgs(3);
  41         let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
  42         let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[None, None, None]);
  43         let mut nodes = create_network(3, &node_cfgs, &node_chanmgrs);
  44
  45         let _chan_0 = create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known());
  46         let _chan_1 = create_announced_chan_between_nodes(&nodes, 2, 1, InitFeatures::known(), InitFeatures::known());
  47         // Rebalance to find a route
  48         send_payment(&nodes[2], &vec!(&nodes[1])[..], 3_000_000);
  49
  50         let (route, payment_hash, payment_preimage, payment_secret) = get_route_and_payment_hash!(nodes[0], nodes[2], 100_000);
  51
  52         // Rebalance so that the first hop fails.
  53         send_payment(&nodes[1], &vec!(&nodes[2])[..], 2_000_000);
  54
  55         // Make sure the payment fails on the first hop.
  56         let payment_id = nodes[0].node.send_payment(&route, payment_hash, &Some(payment_secret)).unwrap();
  57         check_added_monitors!(nodes[0], 1);
  58         let mut events = nodes[0].node.get_and_clear_pending_msg_events();
  59         assert_eq!(events.len(), 1);
  60         let mut payment_event = SendEvent::from_event(events.pop().unwrap());
  61         nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &payment_event.msgs[0]);
  62         check_added_monitors!(nodes[1], 0);
  63         commitment_signed_dance!(nodes[1], nodes[0], payment_event.commitment_msg, false);
  64         expect_pending_htlcs_forwardable!(nodes[1]);
  65         expect_pending_htlcs_forwardable!(&nodes[1]);
  66         let htlc_updates = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
  67         assert!(htlc_updates.update_add_htlcs.is_empty());
  68         assert_eq!(htlc_updates.update_fail_htlcs.len(), 1);
  69         assert!(htlc_updates.update_fulfill_htlcs.is_empty());
  70         assert!(htlc_updates.update_fail_malformed_htlcs.is_empty());
  71         check_added_monitors!(nodes[1], 1);
  72         nodes[0].node.handle_update_fail_htlc(&nodes[1].node.get_our_node_id(), &htlc_updates.update_fail_htlcs[0]);
  73         commitment_signed_dance!(nodes[0], nodes[1], htlc_updates.commitment_signed, false);
  74         expect_payment_failed_conditions(&nodes[0], payment_hash, false, PaymentFailedConditions::new().mpp_parts_remain());
  75
  76         // Rebalance the channel so the retry succeeds.
  77         send_payment(&nodes[2], &vec!(&nodes[1])[..], 3_000_000);
  78
  79         // Mine two blocks (we expire retries after 3, so this will check that we don't expire early)
  80         connect_blocks(&nodes[0], 2);
  81
  82         // Retry the payment and make sure it succeeds.
  83         nodes[0].node.retry_payment(&route, payment_id).unwrap();
  84         check_added_monitors!(nodes[0], 1);
  85         let mut events = nodes[0].node.get_and_clear_pending_msg_events();
  86         assert_eq!(events.len(), 1);
  87         pass_along_path(&nodes[0], &[&nodes[1], &nodes[2]], 100_000, payment_hash, Some(payment_secret), events.pop().unwrap(), true, None);
  88         claim_payment_along_route(&nodes[0], &[&[&nodes[1], &nodes[2]]], false, payment_preimage);
  89 }
  90
  91 #[test]
  92 fn mpp_failure() {
  93         let chanmon_cfgs = create_chanmon_cfgs(4);
  94         let node_cfgs = create_node_cfgs(4, &chanmon_cfgs);
  95         let node_chanmgrs = create_node_chanmgrs(4, &node_cfgs, &[None, None, None, None]);
  96         let nodes = create_network(4, &node_cfgs, &node_chanmgrs);
  97
  98         let chan_1_id = create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known()).0.contents.short_channel_id;
  99         let chan_2_id = create_announced_chan_between_nodes(&nodes, 0, 2, InitFeatures::known(), InitFeatures::known()).0.contents.short_channel_id;
 100         let chan_3_id = create_announced_chan_between_nodes(&nodes, 1, 3, InitFeatures::known(), InitFeatures::known()).0.contents.short_channel_id;
 101         let chan_4_id = create_announced_chan_between_nodes(&nodes, 2, 3, InitFeatures::known(), InitFeatures::known()).0.contents.short_channel_id;
 102
 103         let (mut route, payment_hash, _, payment_secret) = get_route_and_payment_hash!(&nodes[0], nodes[3], 100000);
 104         let path = route.paths[0].clone();
 105         route.paths.push(path);
 106         route.paths[0][0].pubkey = nodes[1].node.get_our_node_id();
 107         route.paths[0][0].short_channel_id = chan_1_id;
 108         route.paths[0][1].short_channel_id = chan_3_id;
 109         route.paths[1][0].pubkey = nodes[2].node.get_our_node_id();
 110         route.paths[1][0].short_channel_id = chan_2_id;
 111         route.paths[1][1].short_channel_id = chan_4_id;
 112         send_along_route_with_secret(&nodes[0], route, &[&[&nodes[1], &nodes[3]], &[&nodes[2], &nodes[3]]], 200_000, payment_hash, payment_secret);
 113         fail_payment_along_route(&nodes[0], &[&[&nodes[1], &nodes[3]], &[&nodes[2], &nodes[3]]], false, payment_hash);
 114 }
 115
 116 #[test]
 117 fn mpp_retry() {
 118         let chanmon_cfgs = create_chanmon_cfgs(4);
 119         let node_cfgs = create_node_cfgs(4, &chanmon_cfgs);
 120         let node_chanmgrs = create_node_chanmgrs(4, &node_cfgs, &[None, None, None, None]);
 121         let nodes = create_network(4, &node_cfgs, &node_chanmgrs);
 122
 123         let chan_1_id = create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known()).0.contents.short_channel_id;
 124         let chan_2_id = create_announced_chan_between_nodes(&nodes, 0, 2, InitFeatures::known(), InitFeatures::known()).0.contents.short_channel_id;
 125         let chan_3_id = create_announced_chan_between_nodes(&nodes, 1, 3, InitFeatures::known(), InitFeatures::known()).0.contents.short_channel_id;
 126         let chan_4_id = create_announced_chan_between_nodes(&nodes, 3, 2, InitFeatures::known(), InitFeatures::known()).0.contents.short_channel_id;
 127         // Rebalance
 128         send_payment(&nodes[3], &vec!(&nodes[2])[..], 1_500_000);
 129
 130         let (mut route, payment_hash, payment_preimage, payment_secret) = get_route_and_payment_hash!(nodes[0], nodes[3], 1_000_000);
 131         let path = route.paths[0].clone();
 132         route.paths.push(path);
 133         route.paths[0][0].pubkey = nodes[1].node.get_our_node_id();
 134         route.paths[0][0].short_channel_id = chan_1_id;
 135         route.paths[0][1].short_channel_id = chan_3_id;
 136         route.paths[1][0].pubkey = nodes[2].node.get_our_node_id();
 137         route.paths[1][0].short_channel_id = chan_2_id;
 138         route.paths[1][1].short_channel_id = chan_4_id;
 139
 140         // Initiate the MPP payment.
 141         let payment_id = nodes[0].node.send_payment(&route, payment_hash, &Some(payment_secret)).unwrap();
 142         check_added_monitors!(nodes[0], 2); // one monitor per path
 143         let mut events = nodes[0].node.get_and_clear_pending_msg_events();
 144         assert_eq!(events.len(), 2);
 145
 146         // Pass half of the payment along the success path.
 147         let success_path_msgs = events.remove(0);
 148         pass_along_path(&nodes[0], &[&nodes[1], &nodes[3]], 2_000_000, payment_hash, Some(payment_secret), success_path_msgs, false, None);
 149
 150         // Add the HTLC along the first hop.
 151         let fail_path_msgs_1 = events.remove(0);
 152         let (update_add, commitment_signed) = match fail_path_msgs_1 {
 153                 MessageSendEvent::UpdateHTLCs { node_id: _, updates: msgs::CommitmentUpdate { ref update_add_htlcs, ref update_fulfill_htlcs, ref update_fail_htlcs, ref update_fail_malformed_htlcs, ref update_fee, ref commitment_signed } } => {
 154                         assert_eq!(update_add_htlcs.len(), 1);
 155                         assert!(update_fail_htlcs.is_empty());
 156                         assert!(update_fulfill_htlcs.is_empty());
 157                         assert!(update_fail_malformed_htlcs.is_empty());
 158                         assert!(update_fee.is_none());
 159                         (update_add_htlcs[0].clone(), commitment_signed.clone())
 160                 },
 161                 _ => panic!("Unexpected event"),
 162         };
 163         nodes[2].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &update_add);
 164         commitment_signed_dance!(nodes[2], nodes[0], commitment_signed, false);
 165
 166         // Attempt to forward the payment and complete the 2nd path's failure.
 167         expect_pending_htlcs_forwardable!(&nodes[2]);
 168         expect_pending_htlcs_forwardable!(&nodes[2]);
 169         let htlc_updates = get_htlc_update_msgs!(nodes[2], nodes[0].node.get_our_node_id());
 170         assert!(htlc_updates.update_add_htlcs.is_empty());
 171         assert_eq!(htlc_updates.update_fail_htlcs.len(), 1);
 172         assert!(htlc_updates.update_fulfill_htlcs.is_empty());
 173         assert!(htlc_updates.update_fail_malformed_htlcs.is_empty());
 174         check_added_monitors!(nodes[2], 1);
 175         nodes[0].node.handle_update_fail_htlc(&nodes[2].node.get_our_node_id(), &htlc_updates.update_fail_htlcs[0]);
 176         commitment_signed_dance!(nodes[0], nodes[2], htlc_updates.commitment_signed, false);
 177         expect_payment_failed_conditions(&nodes[0], payment_hash, false, PaymentFailedConditions::new().mpp_parts_remain());
 178
 179         // Rebalance the channel so the second half of the payment can succeed.
 180         send_payment(&nodes[3], &vec!(&nodes[2])[..], 1_500_000);
 181
 182         // Make sure it errors as expected given a too-large amount.
 183         if let Err(PaymentSendFailure::ParameterError(APIError::APIMisuseError { err })) = nodes[0].node.retry_payment(&route, payment_id) {
 184                 assert!(err.contains("over total_payment_amt_msat"));
 185         } else { panic!("Unexpected error"); }
 186
 187         // Make sure it errors as expected given the wrong payment_id.
 188         if let Err(PaymentSendFailure::ParameterError(APIError::APIMisuseError { err })) = nodes[0].node.retry_payment(&route, PaymentId([0; 32])) {
 189                 assert!(err.contains("not found"));
 190         } else { panic!("Unexpected error"); }
 191
 192         // Retry the second half of the payment and make sure it succeeds.
 193         let mut path = route.clone();
 194         path.paths.remove(0);
 195         nodes[0].node.retry_payment(&path, payment_id).unwrap();
 196         check_added_monitors!(nodes[0], 1);
 197         let mut events = nodes[0].node.get_and_clear_pending_msg_events();
 198         assert_eq!(events.len(), 1);
 199         pass_along_path(&nodes[0], &[&nodes[2], &nodes[3]], 2_000_000, payment_hash, Some(payment_secret), events.pop().unwrap(), true, None);
 200         claim_payment_along_route(&nodes[0], &[&[&nodes[1], &nodes[3]], &[&nodes[2], &nodes[3]]], false, payment_preimage);
 201 }
 202
 203 fn do_mpp_receive_timeout(send_partial_mpp: bool) {
 204         let chanmon_cfgs = create_chanmon_cfgs(4);
 205         let node_cfgs = create_node_cfgs(4, &chanmon_cfgs);
 206         let node_chanmgrs = create_node_chanmgrs(4, &node_cfgs, &[None, None, None, None]);
 207         let nodes = create_network(4, &node_cfgs, &node_chanmgrs);
 208
 209         let chan_1_id = create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known()).0.contents.short_channel_id;
 210         let chan_2_id = create_announced_chan_between_nodes(&nodes, 0, 2, InitFeatures::known(), InitFeatures::known()).0.contents.short_channel_id;
 211         let chan_3_id = create_announced_chan_between_nodes(&nodes, 1, 3, InitFeatures::known(), InitFeatures::known()).0.contents.short_channel_id;
 212         let chan_4_id = create_announced_chan_between_nodes(&nodes, 2, 3, InitFeatures::known(), InitFeatures::known()).0.contents.short_channel_id;
 213
 214         let (mut route, payment_hash, payment_preimage, payment_secret) = get_route_and_payment_hash!(nodes[0], nodes[3], 100_000);
 215         let path = route.paths[0].clone();
 216         route.paths.push(path);
 217         route.paths[0][0].pubkey = nodes[1].node.get_our_node_id();
 218         route.paths[0][0].short_channel_id = chan_1_id;
 219         route.paths[0][1].short_channel_id = chan_3_id;
 220         route.paths[1][0].pubkey = nodes[2].node.get_our_node_id();
 221         route.paths[1][0].short_channel_id = chan_2_id;
 222         route.paths[1][1].short_channel_id = chan_4_id;
 223
 224         // Initiate the MPP payment.
 225         let _ = nodes[0].node.send_payment(&route, payment_hash, &Some(payment_secret)).unwrap();
 226         check_added_monitors!(nodes[0], 2); // one monitor per path
 227         let mut events = nodes[0].node.get_and_clear_pending_msg_events();
 228         assert_eq!(events.len(), 2);
 229
 230         // Pass half of the payment along the first path.
 231         pass_along_path(&nodes[0], &[&nodes[1], &nodes[3]], 200_000, payment_hash, Some(payment_secret), events.remove(0), false, None);
 232
 233         if send_partial_mpp {
 234                 // Time out the partial MPP
 235                 for _ in 0..MPP_TIMEOUT_TICKS {
 236                         nodes[3].node.timer_tick_occurred();
 237                 }
 238
 239                 // Failed HTLC from node 3 -> 1
 240                 expect_pending_htlcs_forwardable!(nodes[3]);
 241                 let htlc_fail_updates_3_1 = get_htlc_update_msgs!(nodes[3], nodes[1].node.get_our_node_id());
 242                 assert_eq!(htlc_fail_updates_3_1.update_fail_htlcs.len(), 1);
 243                 nodes[1].node.handle_update_fail_htlc(&nodes[3].node.get_our_node_id(), &htlc_fail_updates_3_1.update_fail_htlcs[0]);
 244                 check_added_monitors!(nodes[3], 1);
 245                 commitment_signed_dance!(nodes[1], nodes[3], htlc_fail_updates_3_1.commitment_signed, false);
 246
 247                 // Failed HTLC from node 1 -> 0
 248                 expect_pending_htlcs_forwardable!(nodes[1]);
 249                 let htlc_fail_updates_1_0 = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
 250                 assert_eq!(htlc_fail_updates_1_0.update_fail_htlcs.len(), 1);
 251                 nodes[0].node.handle_update_fail_htlc(&nodes[1].node.get_our_node_id(), &htlc_fail_updates_1_0.update_fail_htlcs[0]);
 252                 check_added_monitors!(nodes[1], 1);
 253                 commitment_signed_dance!(nodes[0], nodes[1], htlc_fail_updates_1_0.commitment_signed, false);
 254
 255                 expect_payment_failed_conditions(&nodes[0], payment_hash, false, PaymentFailedConditions::new().mpp_parts_remain().expected_htlc_error_data(23, &[][..]));
 256         } else {
 257                 // Pass half of the payment along the second path.
 258                 pass_along_path(&nodes[0], &[&nodes[2], &nodes[3]], 200_000, payment_hash, Some(payment_secret), events.remove(0), true, None);
 259
 260                 // Even after MPP_TIMEOUT_TICKS we should not timeout the MPP if we have all the parts
 261                 for _ in 0..MPP_TIMEOUT_TICKS {
 262                         nodes[3].node.timer_tick_occurred();
 263                 }
 264
 265                 claim_payment_along_route(&nodes[0], &[&[&nodes[1], &nodes[3]], &[&nodes[2], &nodes[3]]], false, payment_preimage);
 266         }
 267 }
 268
 269 #[test]
 270 fn mpp_receive_timeout() {
 271         do_mpp_receive_timeout(true);
 272         do_mpp_receive_timeout(false);
 273 }
 274
 275 #[test]
 276 fn retry_expired_payment() {
 277         let chanmon_cfgs = create_chanmon_cfgs(3);
 278         let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
 279         let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[None, None, None]);
 280         let mut nodes = create_network(3, &node_cfgs, &node_chanmgrs);
 281
 282         let _chan_0 = create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known());
 283         let _chan_1 = create_announced_chan_between_nodes(&nodes, 2, 1, InitFeatures::known(), InitFeatures::known());
 284         // Rebalance to find a route
 285         send_payment(&nodes[2], &vec!(&nodes[1])[..], 3_000_000);
 286
 287         let (route, payment_hash, _, payment_secret) = get_route_and_payment_hash!(nodes[0], nodes[2], 100_000);
 288
 289         // Rebalance so that the first hop fails.
 290         send_payment(&nodes[1], &vec!(&nodes[2])[..], 2_000_000);
 291
 292         // Make sure the payment fails on the first hop.
 293         let payment_id = nodes[0].node.send_payment(&route, payment_hash, &Some(payment_secret)).unwrap();
 294         check_added_monitors!(nodes[0], 1);
 295         let mut events = nodes[0].node.get_and_clear_pending_msg_events();
 296         assert_eq!(events.len(), 1);
 297         let mut payment_event = SendEvent::from_event(events.pop().unwrap());
 298         nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &payment_event.msgs[0]);
 299         check_added_monitors!(nodes[1], 0);
 300         commitment_signed_dance!(nodes[1], nodes[0], payment_event.commitment_msg, false);
 301         expect_pending_htlcs_forwardable!(nodes[1]);
 302         expect_pending_htlcs_forwardable!(&nodes[1]);
 303         let htlc_updates = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
 304         assert!(htlc_updates.update_add_htlcs.is_empty());
 305         assert_eq!(htlc_updates.update_fail_htlcs.len(), 1);
 306         assert!(htlc_updates.update_fulfill_htlcs.is_empty());
 307         assert!(htlc_updates.update_fail_malformed_htlcs.is_empty());
 308         check_added_monitors!(nodes[1], 1);
 309         nodes[0].node.handle_update_fail_htlc(&nodes[1].node.get_our_node_id(), &htlc_updates.update_fail_htlcs[0]);
 310         commitment_signed_dance!(nodes[0], nodes[1], htlc_updates.commitment_signed, false);
 311         expect_payment_failed!(nodes[0], payment_hash, false);
 312
 313         // Mine blocks so the payment will have expired.
 314         connect_blocks(&nodes[0], 3);
 315
 316         // Retry the payment and make sure it errors as expected.
 317         if let Err(PaymentSendFailure::ParameterError(APIError::APIMisuseError { err })) = nodes[0].node.retry_payment(&route, payment_id) {
 318                 assert!(err.contains("not found"));
 319         } else {
 320                 panic!("Unexpected error");
 321         }
 322 }
 323
 324 #[test]
 325 fn no_pending_leak_on_initial_send_failure() {
 326         // In an earlier version of our payment tracking, we'd have a retry entry even when the initial
 327         // HTLC for payment failed to send due to local channel errors (e.g. peer disconnected). In this
 328         // case, the user wouldn't have a PaymentId to retry the payment with, but we'd think we have a
 329         // pending payment forever and never time it out.
 330         // Here we test exactly that - retrying a payment when a peer was disconnected on the first
 331         // try, and then check that no pending payment is being tracked.
 332         let chanmon_cfgs = create_chanmon_cfgs(2);
 333         let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
 334         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
 335         let mut nodes = create_network(2, &node_cfgs, &node_chanmgrs);
 336
 337         create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known());
 338
 339         let (route, payment_hash, _, payment_secret) = get_route_and_payment_hash!(nodes[0], nodes[1], 100_000);
 340
 341         nodes[0].node.peer_disconnected(&nodes[1].node.get_our_node_id(), false);
 342         nodes[1].node.peer_disconnected(&nodes[1].node.get_our_node_id(), false);
 343
 344         unwrap_send_err!(nodes[0].node.send_payment(&route, payment_hash, &Some(payment_secret)),
 345                 true, APIError::ChannelUnavailable { ref err },
 346                 assert_eq!(err, "Peer for first hop currently disconnected/pending monitor update!"));
 347
 348         assert!(!nodes[0].node.has_pending_payments());
 349 }
 350
 351 fn do_retry_with_no_persist(confirm_before_reload: bool) {
 352         // If we send a pending payment and `send_payment` returns success, we should always either
 353         // return a payment failure event or a payment success event, and on failure the payment should
 354         // be retryable.
 355         //
 356         // In order to do so when the ChannelManager isn't immediately persisted (which is normal - its
 357         // always persisted asynchronously), the ChannelManager has to reload some payment data from
 358         // ChannelMonitor(s) in some cases. This tests that reloading.
 359         //
 360         // `confirm_before_reload` confirms the channel-closing commitment transaction on-chain prior
 361         // to reloading the ChannelManager, increasing test coverage in ChannelMonitor HTLC tracking
 362         // which has separate codepaths for "commitment transaction already confirmed" and not.
 363         let chanmon_cfgs = create_chanmon_cfgs(3);
 364         let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
 365         let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[None, None, None]);
 366         let persister: test_utils::TestPersister;
 367         let new_chain_monitor: test_utils::TestChainMonitor;
 368         let nodes_0_deserialized: ChannelManager<EnforcingSigner, &test_utils::TestChainMonitor, &test_utils::TestBroadcaster, &test_utils::TestKeysInterface, &test_utils::TestFeeEstimator, &test_utils::TestLogger>;
 369         let mut nodes = create_network(3, &node_cfgs, &node_chanmgrs);
 370
 371         let chan_id = create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known()).2;
 372         let (_, _, chan_id_2, _) = create_announced_chan_between_nodes(&nodes, 1, 2, InitFeatures::known(), InitFeatures::known());
 373
 374         // Serialize the ChannelManager prior to sending payments
 375         let nodes_0_serialized = nodes[0].node.encode();
 376
 377         // Send two payments - one which will get to nodes[2] and will be claimed, one which we'll time
 378         // out and retry.
 379         let (route, payment_hash, payment_preimage, payment_secret) = get_route_and_payment_hash!(nodes[0], nodes[2], 1_000_000);
 380         let (payment_preimage_1, payment_hash_1, _, payment_id_1) = send_along_route(&nodes[0], route.clone(), &[&nodes[1], &nodes[2]], 1_000_000);
 381         let payment_id = nodes[0].node.send_payment(&route, payment_hash, &Some(payment_secret)).unwrap();
 382         check_added_monitors!(nodes[0], 1);
 383
 384         let mut events = nodes[0].node.get_and_clear_pending_msg_events();
 385         assert_eq!(events.len(), 1);
 386         let payment_event = SendEvent::from_event(events.pop().unwrap());
 387         assert_eq!(payment_event.node_id, nodes[1].node.get_our_node_id());
 388
 389         // We relay the payment to nodes[1] while its disconnected from nodes[2], causing the payment
 390         // to be returned immediately to nodes[0], without having nodes[2] fail the inbound payment
 391         // which would prevent retry.
 392         nodes[1].node.peer_disconnected(&nodes[2].node.get_our_node_id(), false);
 393         nodes[2].node.peer_disconnected(&nodes[1].node.get_our_node_id(), false);
 394
 395         nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &payment_event.msgs[0]);
 396         commitment_signed_dance!(nodes[1], nodes[0], payment_event.commitment_msg, false, true);
 397         // nodes[1] now immediately fails the HTLC as the next-hop channel is disconnected
 398         let _ = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
 399
 400         reconnect_nodes(&nodes[1], &nodes[2], (false, false), (0, 0), (0, 0), (0, 0), (0, 0), (0, 0), (false, false));
 401
 402         let as_commitment_tx = get_local_commitment_txn!(nodes[0], chan_id)[0].clone();
 403         if confirm_before_reload {
 404                 mine_transaction(&nodes[0], &as_commitment_tx);
 405                 nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().clear();
 406         }
 407
 408         // The ChannelMonitor should always be the latest version, as we're required to persist it
 409         // during the `commitment_signed_dance!()`.
 410         let mut chan_0_monitor_serialized = test_utils::TestVecWriter(Vec::new());
 411         get_monitor!(nodes[0], chan_id).write(&mut chan_0_monitor_serialized).unwrap();
 412
 413         persister = test_utils::TestPersister::new();
 414         let keys_manager = &chanmon_cfgs[0].keys_manager;
 415         new_chain_monitor = test_utils::TestChainMonitor::new(Some(nodes[0].chain_source), nodes[0].tx_broadcaster.clone(), nodes[0].logger, node_cfgs[0].fee_estimator, &persister, keys_manager);
 416         nodes[0].chain_monitor = &new_chain_monitor;
 417         let mut chan_0_monitor_read = &chan_0_monitor_serialized.0[..];
 418         let (_, mut chan_0_monitor) = <(BlockHash, ChannelMonitor<EnforcingSigner>)>::read(
 419                 &mut chan_0_monitor_read, keys_manager).unwrap();
 420         assert!(chan_0_monitor_read.is_empty());
 421
 422         let mut nodes_0_read = &nodes_0_serialized[..];
 423         let (_, nodes_0_deserialized_tmp) = {
 424                 let mut channel_monitors = HashMap::new();
 425                 channel_monitors.insert(chan_0_monitor.get_funding_txo().0, &mut chan_0_monitor);
 426                 <(BlockHash, ChannelManager<EnforcingSigner, &test_utils::TestChainMonitor, &test_utils::TestBroadcaster, &test_utils::TestKeysInterface, &test_utils::TestFeeEstimator, &test_utils::TestLogger>)>::read(&mut nodes_0_read, ChannelManagerReadArgs {
 427                         default_config: test_default_channel_config(),
 428                         keys_manager,
 429                         fee_estimator: node_cfgs[0].fee_estimator,
 430                         chain_monitor: nodes[0].chain_monitor,
 431                         tx_broadcaster: nodes[0].tx_broadcaster.clone(),
 432                         logger: nodes[0].logger,
 433                         channel_monitors,
 434                 }).unwrap()
 435         };
 436         nodes_0_deserialized = nodes_0_deserialized_tmp;
 437         assert!(nodes_0_read.is_empty());
 438
 439         assert!(nodes[0].chain_monitor.watch_channel(chan_0_monitor.get_funding_txo().0, chan_0_monitor).is_ok());
 440         nodes[0].node = &nodes_0_deserialized;
 441         check_added_monitors!(nodes[0], 1);
 442
 443         // On reload, the ChannelManager should realize it is stale compared to the ChannelMonitor and
 444         // force-close the channel.
 445         check_closed_event!(nodes[0], 1, ClosureReason::OutdatedChannelManager);
 446         assert!(nodes[0].node.list_channels().is_empty());
 447         assert!(nodes[0].node.has_pending_payments());
 448         let as_broadcasted_txn = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0);
 449         assert_eq!(as_broadcasted_txn.len(), 1);
 450         assert_eq!(as_broadcasted_txn[0], as_commitment_tx);
 451
 452         nodes[1].node.peer_disconnected(&nodes[0].node.get_our_node_id(), false);
 453         nodes[0].node.peer_connected(&nodes[1].node.get_our_node_id(), &msgs::Init { features: InitFeatures::known(), remote_network_address: None });
 454         assert!(nodes[0].node.get_and_clear_pending_msg_events().is_empty());
 455
 456         // Now nodes[1] should send a channel reestablish, which nodes[0] will respond to with an
 457         // error, as the channel has hit the chain.
 458         nodes[1].node.peer_connected(&nodes[0].node.get_our_node_id(), &msgs::Init { features: InitFeatures::known(), remote_network_address: None });
 459         let bs_reestablish = get_event_msg!(nodes[1], MessageSendEvent::SendChannelReestablish, nodes[0].node.get_our_node_id());
 460         nodes[0].node.handle_channel_reestablish(&nodes[1].node.get_our_node_id(), &bs_reestablish);
 461         let as_err = nodes[0].node.get_and_clear_pending_msg_events();
 462         assert_eq!(as_err.len(), 1);
 463         match as_err[0] {
 464                 MessageSendEvent::HandleError { node_id, action: msgs::ErrorAction::SendErrorMessage { ref msg } } => {
 465                         assert_eq!(node_id, nodes[1].node.get_our_node_id());
 466                         nodes[1].node.handle_error(&nodes[0].node.get_our_node_id(), msg);
 467                         check_closed_event!(nodes[1], 1, ClosureReason::CounterpartyForceClosed { peer_msg: "Failed to find corresponding channel".to_string() });
 468                         check_added_monitors!(nodes[1], 1);
 469                         assert_eq!(nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0).len(), 1);
 470                 },
 471                 _ => panic!("Unexpected event"),
 472         }
 473         check_closed_broadcast!(nodes[1], false);
 474
 475         // Now claim the first payment, which should allow nodes[1] to claim the payment on-chain when
 476         // we close in a moment.
 477         nodes[2].node.claim_funds(payment_preimage_1);
 478         check_added_monitors!(nodes[2], 1);
 479         expect_payment_claimed!(nodes[2], payment_hash_1, 1_000_000);
 480
 481         let htlc_fulfill_updates = get_htlc_update_msgs!(nodes[2], nodes[1].node.get_our_node_id());
 482         nodes[1].node.handle_update_fulfill_htlc(&nodes[2].node.get_our_node_id(), &htlc_fulfill_updates.update_fulfill_htlcs[0]);
 483         check_added_monitors!(nodes[1], 1);
 484         commitment_signed_dance!(nodes[1], nodes[2], htlc_fulfill_updates.commitment_signed, false);
 485
 486         if confirm_before_reload {
 487                 let best_block = nodes[0].blocks.lock().unwrap().last().unwrap().clone();
 488                 nodes[0].node.best_block_updated(&best_block.0.header, best_block.1);
 489         }
 490
 491         // Create a new channel on which to retry the payment before we fail the payment via the
 492         // HTLC-Timeout transaction. This avoids ChannelManager timing out the payment due to us
 493         // connecting several blocks while creating the channel (implying time has passed).
 494         create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known());
 495         assert_eq!(nodes[0].node.list_usable_channels().len(), 1);
 496
 497         mine_transaction(&nodes[1], &as_commitment_tx);
 498         let bs_htlc_claim_txn = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0);
 499         assert_eq!(bs_htlc_claim_txn.len(), 1);
 500         check_spends!(bs_htlc_claim_txn[0], as_commitment_tx);
 501         expect_payment_forwarded!(nodes[1], nodes[0], nodes[2], None, false, false);
 502
 503         if !confirm_before_reload {
 504                 mine_transaction(&nodes[0], &as_commitment_tx);
 505         }
 506         mine_transaction(&nodes[0], &bs_htlc_claim_txn[0]);
 507         expect_payment_sent!(nodes[0], payment_preimage_1);
 508         connect_blocks(&nodes[0], TEST_FINAL_CLTV*4 + 20);
 509         let as_htlc_timeout_txn = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0);
 510         assert_eq!(as_htlc_timeout_txn.len(), 3);
 511         let (first_htlc_timeout_tx, second_htlc_timeout_tx) = if as_htlc_timeout_txn[0] == as_commitment_tx {
 512                 (&as_htlc_timeout_txn[1], &as_htlc_timeout_txn[2])
 513         } else {
 514                 assert_eq!(as_htlc_timeout_txn[2], as_commitment_tx);
 515                 (&as_htlc_timeout_txn[0], &as_htlc_timeout_txn[1])
 516         };
 517         check_spends!(first_htlc_timeout_tx, as_commitment_tx);
 518         check_spends!(second_htlc_timeout_tx, as_commitment_tx);
 519         if first_htlc_timeout_tx.input[0].previous_output == bs_htlc_claim_txn[0].input[0].previous_output {
 520                 confirm_transaction(&nodes[0], &second_htlc_timeout_tx);
 521         } else {
 522                 confirm_transaction(&nodes[0], &first_htlc_timeout_tx);
 523         }
 524         nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().clear();
 525         expect_payment_failed_conditions(&nodes[0], payment_hash, false, PaymentFailedConditions::new().mpp_parts_remain());
 526
 527         // Finally, retry the payment (which was reloaded from the ChannelMonitor when nodes[0] was
 528         // reloaded) via a route over the new channel, which work without issue and eventually be
 529         // received and claimed at the recipient just like any other payment.
 530         let (mut new_route, _, _, _) = get_route_and_payment_hash!(nodes[0], nodes[2], 1_000_000);
 531
 532         // Update the fee on the middle hop to ensure PaymentSent events have the correct (retried) fee
 533         // and not the original fee. We also update node[1]'s relevant config as
 534         // do_claim_payment_along_route expects us to never overpay.
 535         {
 536                 let mut channel_state = nodes[1].node.channel_state.lock().unwrap();
 537                 let mut channel = channel_state.by_id.get_mut(&chan_id_2).unwrap();
 538                 let mut new_config = channel.config();
 539                 new_config.forwarding_fee_base_msat += 100_000;
 540                 channel.update_config(&new_config);
 541                 new_route.paths[0][0].fee_msat += 100_000;
 542         }
 543
 544         // Force expiration of the channel's previous config.
 545         for _ in 0..EXPIRE_PREV_CONFIG_TICKS {
 546                 nodes[1].node.timer_tick_occurred();
 547         }
 548
 549         assert!(nodes[0].node.retry_payment(&new_route, payment_id_1).is_err()); // Shouldn't be allowed to retry a fulfilled payment
 550         nodes[0].node.retry_payment(&new_route, payment_id).unwrap();
 551         check_added_monitors!(nodes[0], 1);
 552         let mut events = nodes[0].node.get_and_clear_pending_msg_events();
 553         assert_eq!(events.len(), 1);
 554         pass_along_path(&nodes[0], &[&nodes[1], &nodes[2]], 1_000_000, payment_hash, Some(payment_secret), events.pop().unwrap(), true, None);
 555         do_claim_payment_along_route(&nodes[0], &[&[&nodes[1], &nodes[2]]], false, payment_preimage);
 556         expect_payment_sent!(nodes[0], payment_preimage, Some(new_route.paths[0][0].fee_msat));
 557 }
 558
 559 #[test]
 560 fn retry_with_no_persist() {
 561         do_retry_with_no_persist(true);
 562         do_retry_with_no_persist(false);
 563 }
 564
 565 fn do_test_dup_htlc_onchain_fails_on_reload(persist_manager_post_event: bool, confirm_commitment_tx: bool, payment_timeout: bool) {
 566         // When a Channel is closed, any outbound HTLCs which were relayed through it are simply
 567         // dropped when the Channel is. From there, the ChannelManager relies on the ChannelMonitor
 568         // having a copy of the relevant fail-/claim-back data and processes the HTLC fail/claim when
 569         // the ChannelMonitor tells it to.
 570         //
 571         // If, due to an on-chain event, an HTLC is failed/claimed, we should avoid providing the
 572         // ChannelManager the HTLC event until after the monitor is re-persisted. This should prevent a
 573         // duplicate HTLC fail/claim (e.g. via a PaymentPathFailed event).
 574         let chanmon_cfgs = create_chanmon_cfgs(2);
 575         let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
 576         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
 577         let persister: test_utils::TestPersister;
 578         let new_chain_monitor: test_utils::TestChainMonitor;
 579         let nodes_0_deserialized: ChannelManager<EnforcingSigner, &test_utils::TestChainMonitor, &test_utils::TestBroadcaster, &test_utils::TestKeysInterface, &test_utils::TestFeeEstimator, &test_utils::TestLogger>;
 580         let mut nodes = create_network(2, &node_cfgs, &node_chanmgrs);
 581
 582         let (_, _, chan_id, funding_tx) = create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known());
 583
 584         // Route a payment, but force-close the channel before the HTLC fulfill message arrives at
 585         // nodes[0].
 586         let (payment_preimage, payment_hash, _) = route_payment(&nodes[0], &[&nodes[1]], 10_000_000);
 587         nodes[0].node.force_close_channel(&nodes[0].node.list_channels()[0].channel_id, &nodes[1].node.get_our_node_id()).unwrap();
 588         check_closed_broadcast!(nodes[0], true);
 589         check_added_monitors!(nodes[0], 1);
 590         check_closed_event!(nodes[0], 1, ClosureReason::HolderForceClosed);
 591
 592         nodes[0].node.peer_disconnected(&nodes[1].node.get_our_node_id(), false);
 593         nodes[1].node.peer_disconnected(&nodes[0].node.get_our_node_id(), false);
 594
 595         // Connect blocks until the CLTV timeout is up so that we get an HTLC-Timeout transaction
 596         connect_blocks(&nodes[0], TEST_FINAL_CLTV + LATENCY_GRACE_PERIOD_BLOCKS + 1);
 597         let node_txn = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0);
 598         assert_eq!(node_txn.len(), 3);
 599         assert_eq!(node_txn[0], node_txn[1]);
 600         check_spends!(node_txn[1], funding_tx);
 601         check_spends!(node_txn[2], node_txn[1]);
 602         let timeout_txn = vec![node_txn[2].clone()];
 603
 604         nodes[1].node.claim_funds(payment_preimage);
 605         check_added_monitors!(nodes[1], 1);
 606         expect_payment_claimed!(nodes[1], payment_hash, 10_000_000);
 607
 608         let mut header = BlockHeader { version: 0x20000000, prev_blockhash: nodes[1].best_block_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
 609         connect_block(&nodes[1], &Block { header, txdata: vec![node_txn[1].clone()]});
 610         check_closed_broadcast!(nodes[1], true);
 611         check_added_monitors!(nodes[1], 1);
 612         check_closed_event!(nodes[1], 1, ClosureReason::CommitmentTxConfirmed);
 613         let claim_txn = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0);
 614         assert_eq!(claim_txn.len(), 3);
 615         check_spends!(claim_txn[0], node_txn[1]);
 616         check_spends!(claim_txn[1], funding_tx);
 617         check_spends!(claim_txn[2], claim_txn[1]);
 618
 619         header.prev_blockhash = nodes[0].best_block_hash();
 620         connect_block(&nodes[0], &Block { header, txdata: vec![node_txn[1].clone()]});
 621
 622         if confirm_commitment_tx {
 623                 connect_blocks(&nodes[0], BREAKDOWN_TIMEOUT as u32 - 1);
 624         }
 625
 626         header.prev_blockhash = nodes[0].best_block_hash();
 627         let claim_block = Block { header, txdata: if payment_timeout { timeout_txn } else { vec![claim_txn[0].clone()] } };
 628
 629         if payment_timeout {
 630                 assert!(confirm_commitment_tx); // Otherwise we're spending below our CSV!
 631                 connect_block(&nodes[0], &claim_block);
 632                 connect_blocks(&nodes[0], ANTI_REORG_DELAY - 2);
 633         }
 634
 635         // Now connect the HTLC claim transaction with the ChainMonitor-generated ChannelMonitor update
 636         // returning TemporaryFailure. This should cause the claim event to never make its way to the
 637         // ChannelManager.
 638         chanmon_cfgs[0].persister.chain_sync_monitor_persistences.lock().unwrap().clear();
 639         chanmon_cfgs[0].persister.set_update_ret(Err(ChannelMonitorUpdateErr::TemporaryFailure));
 640
 641         if payment_timeout {
 642                 connect_blocks(&nodes[0], 1);
 643         } else {
 644                 connect_block(&nodes[0], &claim_block);
 645         }
 646
 647         let funding_txo = OutPoint { txid: funding_tx.txid(), index: 0 };
 648         let mon_updates: Vec<_> = chanmon_cfgs[0].persister.chain_sync_monitor_persistences.lock().unwrap()
 649                 .get_mut(&funding_txo).unwrap().drain().collect();
 650         // If we are using chain::Confirm instead of chain::Listen, we will get the same update twice
 651         assert!(mon_updates.len() == 1 || mon_updates.len() == 2);
 652         assert!(nodes[0].chain_monitor.release_pending_monitor_events().is_empty());
 653         assert!(nodes[0].node.get_and_clear_pending_events().is_empty());
 654
 655         // If we persist the ChannelManager here, we should get the PaymentSent event after
 656         // deserialization.
 657         let mut chan_manager_serialized = test_utils::TestVecWriter(Vec::new());
 658         if !persist_manager_post_event {
 659                 nodes[0].node.write(&mut chan_manager_serialized).unwrap();
 660         }
 661
 662         // Now persist the ChannelMonitor and inform the ChainMonitor that we're done, generating the
 663         // payment sent event.
 664         chanmon_cfgs[0].persister.set_update_ret(Ok(()));
 665         let mut chan_0_monitor_serialized = test_utils::TestVecWriter(Vec::new());
 666         get_monitor!(nodes[0], chan_id).write(&mut chan_0_monitor_serialized).unwrap();
 667         for update in mon_updates {
 668                 nodes[0].chain_monitor.chain_monitor.channel_monitor_updated(funding_txo, update).unwrap();
 669         }
 670         if payment_timeout {
 671                 expect_payment_failed!(nodes[0], payment_hash, true);
 672         } else {
 673                 expect_payment_sent!(nodes[0], payment_preimage);
 674         }
 675
 676         // If we persist the ChannelManager after we get the PaymentSent event, we shouldn't get it
 677         // twice.
 678         if persist_manager_post_event {
 679                 nodes[0].node.write(&mut chan_manager_serialized).unwrap();
 680         }
 681
 682         // Now reload nodes[0]...
 683         persister = test_utils::TestPersister::new();
 684         let keys_manager = &chanmon_cfgs[0].keys_manager;
 685         new_chain_monitor = test_utils::TestChainMonitor::new(Some(nodes[0].chain_source), nodes[0].tx_broadcaster.clone(), nodes[0].logger, node_cfgs[0].fee_estimator, &persister, keys_manager);
 686         nodes[0].chain_monitor = &new_chain_monitor;
 687         let mut chan_0_monitor_read = &chan_0_monitor_serialized.0[..];
 688         let (_, mut chan_0_monitor) = <(BlockHash, ChannelMonitor<EnforcingSigner>)>::read(
 689                 &mut chan_0_monitor_read, keys_manager).unwrap();
 690         assert!(chan_0_monitor_read.is_empty());
 691
 692         let (_, nodes_0_deserialized_tmp) = {
 693                 let mut channel_monitors = HashMap::new();
 694                 channel_monitors.insert(chan_0_monitor.get_funding_txo().0, &mut chan_0_monitor);
 695                 <(BlockHash, ChannelManager<EnforcingSigner, &test_utils::TestChainMonitor, &test_utils::TestBroadcaster, &test_utils::TestKeysInterface, &test_utils::TestFeeEstimator, &test_utils::TestLogger>)>
 696                         ::read(&mut io::Cursor::new(&chan_manager_serialized.0[..]), ChannelManagerReadArgs {
 697                                 default_config: Default::default(),
 698                                 keys_manager,
 699                                 fee_estimator: node_cfgs[0].fee_estimator,
 700                                 chain_monitor: nodes[0].chain_monitor,
 701                                 tx_broadcaster: nodes[0].tx_broadcaster.clone(),
 702                                 logger: nodes[0].logger,
 703                                 channel_monitors,
 704                         }).unwrap()
 705         };
 706         nodes_0_deserialized = nodes_0_deserialized_tmp;
 707
 708         assert!(nodes[0].chain_monitor.watch_channel(chan_0_monitor.get_funding_txo().0, chan_0_monitor).is_ok());
 709         check_added_monitors!(nodes[0], 1);
 710         nodes[0].node = &nodes_0_deserialized;
 711
 712         if persist_manager_post_event {
 713                 assert!(nodes[0].node.get_and_clear_pending_events().is_empty());
 714         } else if payment_timeout {
 715                 expect_payment_failed!(nodes[0], payment_hash, true);
 716         } else {
 717                 expect_payment_sent!(nodes[0], payment_preimage);
 718         }
 719
 720         // Note that if we re-connect the block which exposed nodes[0] to the payment preimage (but
 721         // which the current ChannelMonitor has not seen), the ChannelManager's de-duplication of
 722         // payment events should kick in, leaving us with no pending events here.
 723         let height = nodes[0].blocks.lock().unwrap().len() as u32 - 1;
 724         nodes[0].chain_monitor.chain_monitor.block_connected(&claim_block, height);
 725         assert!(nodes[0].node.get_and_clear_pending_events().is_empty());
 726 }
 727
 728 #[test]
 729 fn test_dup_htlc_onchain_fails_on_reload() {
 730         do_test_dup_htlc_onchain_fails_on_reload(true, true, true);
 731         do_test_dup_htlc_onchain_fails_on_reload(true, true, false);
 732         do_test_dup_htlc_onchain_fails_on_reload(true, false, false);
 733         do_test_dup_htlc_onchain_fails_on_reload(false, true, true);
 734         do_test_dup_htlc_onchain_fails_on_reload(false, true, false);
 735         do_test_dup_htlc_onchain_fails_on_reload(false, false, false);
 736 }
 737
 738 #[test]
 739 fn test_fulfill_restart_failure() {
 740         // When we receive an update_fulfill_htlc message, we immediately consider the HTLC fully
 741         // fulfilled. At this point, the peer can reconnect and decide to either fulfill the HTLC
 742         // again, or fail it, giving us free money.
 743         //
 744         // Of course probably they won't fail it and give us free money, but because we have code to
 745         // handle it, we should test the logic for it anyway. We do that here.
 746         let chanmon_cfgs = create_chanmon_cfgs(2);
 747         let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
 748         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
 749         let persister: test_utils::TestPersister;
 750         let new_chain_monitor: test_utils::TestChainMonitor;
 751         let nodes_1_deserialized: ChannelManager<EnforcingSigner, &test_utils::TestChainMonitor, &test_utils::TestBroadcaster, &test_utils::TestKeysInterface, &test_utils::TestFeeEstimator, &test_utils::TestLogger>;
 752         let mut nodes = create_network(2, &node_cfgs, &node_chanmgrs);
 753
 754         let chan_id = create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known()).2;
 755         let (payment_preimage, payment_hash, _) = route_payment(&nodes[0], &[&nodes[1]], 100_000);
 756
 757         // The simplest way to get a failure after a fulfill is to reload nodes[1] from a state
 758         // pre-fulfill, which we do by serializing it here.
 759         let mut chan_manager_serialized = test_utils::TestVecWriter(Vec::new());
 760         nodes[1].node.write(&mut chan_manager_serialized).unwrap();
 761         let mut chan_0_monitor_serialized = test_utils::TestVecWriter(Vec::new());
 762         get_monitor!(nodes[1], chan_id).write(&mut chan_0_monitor_serialized).unwrap();
 763
 764         nodes[1].node.claim_funds(payment_preimage);
 765         check_added_monitors!(nodes[1], 1);
 766         expect_payment_claimed!(nodes[1], payment_hash, 100_000);
 767
 768         let htlc_fulfill_updates = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
 769         nodes[0].node.handle_update_fulfill_htlc(&nodes[1].node.get_our_node_id(), &htlc_fulfill_updates.update_fulfill_htlcs[0]);
 770         expect_payment_sent_without_paths!(nodes[0], payment_preimage);
 771
 772         // Now reload nodes[1]...
 773         persister = test_utils::TestPersister::new();
 774         let keys_manager = &chanmon_cfgs[1].keys_manager;
 775         new_chain_monitor = test_utils::TestChainMonitor::new(Some(nodes[1].chain_source), nodes[1].tx_broadcaster.clone(), nodes[1].logger, node_cfgs[1].fee_estimator, &persister, keys_manager);
 776         nodes[1].chain_monitor = &new_chain_monitor;
 777         let mut chan_0_monitor_read = &chan_0_monitor_serialized.0[..];
 778         let (_, mut chan_0_monitor) = <(BlockHash, ChannelMonitor<EnforcingSigner>)>::read(
 779                 &mut chan_0_monitor_read, keys_manager).unwrap();
 780         assert!(chan_0_monitor_read.is_empty());
 781
 782         let (_, nodes_1_deserialized_tmp) = {
 783                 let mut channel_monitors = HashMap::new();
 784                 channel_monitors.insert(chan_0_monitor.get_funding_txo().0, &mut chan_0_monitor);
 785                 <(BlockHash, ChannelManager<EnforcingSigner, &test_utils::TestChainMonitor, &test_utils::TestBroadcaster, &test_utils::TestKeysInterface, &test_utils::TestFeeEstimator, &test_utils::TestLogger>)>
 786                         ::read(&mut io::Cursor::new(&chan_manager_serialized.0[..]), ChannelManagerReadArgs {
 787                                 default_config: Default::default(),
 788                                 keys_manager,
 789                                 fee_estimator: node_cfgs[1].fee_estimator,
 790                                 chain_monitor: nodes[1].chain_monitor,
 791                                 tx_broadcaster: nodes[1].tx_broadcaster.clone(),
 792                                 logger: nodes[1].logger,
 793                                 channel_monitors,
 794                         }).unwrap()
 795         };
 796         nodes_1_deserialized = nodes_1_deserialized_tmp;
 797
 798         assert!(nodes[1].chain_monitor.watch_channel(chan_0_monitor.get_funding_txo().0, chan_0_monitor).is_ok());
 799         check_added_monitors!(nodes[1], 1);
 800         nodes[1].node = &nodes_1_deserialized;
 801
 802         nodes[0].node.peer_disconnected(&nodes[1].node.get_our_node_id(), false);
 803         reconnect_nodes(&nodes[0], &nodes[1], (false, false), (0, 0), (0, 0), (0, 0), (0, 0), (0, 0), (false, false));
 804
 805         nodes[1].node.fail_htlc_backwards(&payment_hash);
 806         expect_pending_htlcs_forwardable!(nodes[1]);
 807         check_added_monitors!(nodes[1], 1);
 808         let htlc_fail_updates = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
 809         nodes[0].node.handle_update_fail_htlc(&nodes[1].node.get_our_node_id(), &htlc_fail_updates.update_fail_htlcs[0]);
 810         commitment_signed_dance!(nodes[0], nodes[1], htlc_fail_updates.commitment_signed, false);
 811         // nodes[0] shouldn't generate any events here, while it just got a payment failure completion
 812         // it had already considered the payment fulfilled, and now they just got free money.
 813         assert!(nodes[0].node.get_and_clear_pending_events().is_empty());
 814 }
 815
 816 #[test]
 817 fn get_ldk_payment_preimage() {
 818         // Ensure that `ChannelManager::get_payment_preimage` can successfully be used to claim a payment.
 819         let chanmon_cfgs = create_chanmon_cfgs(2);
 820         let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
 821         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
 822         let mut nodes = create_network(2, &node_cfgs, &node_chanmgrs);
 823         create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known());
 824
 825         let amt_msat = 60_000;
 826         let expiry_secs = 60 * 60;
 827         let (payment_hash, payment_secret) = nodes[1].node.create_inbound_payment(Some(amt_msat), expiry_secs).unwrap();
 828
 829         let payment_params = PaymentParameters::from_node_id(nodes[1].node.get_our_node_id())
 830                 .with_features(InvoiceFeatures::known());
 831         let scorer = test_utils::TestScorer::with_penalty(0);
 832         let keys_manager = test_utils::TestKeysInterface::new(&[0u8; 32], Network::Testnet);
 833         let random_seed_bytes = keys_manager.get_secure_random_bytes();
 834         let route = get_route(
 835                 &nodes[0].node.get_our_node_id(), &payment_params, &nodes[0].network_graph.read_only(),
 836                 Some(&nodes[0].node.list_usable_channels().iter().collect::<Vec<_>>()),
 837                 amt_msat, TEST_FINAL_CLTV, nodes[0].logger, &scorer, &random_seed_bytes).unwrap();
 838         let _payment_id = nodes[0].node.send_payment(&route, payment_hash, &Some(payment_secret)).unwrap();
 839         check_added_monitors!(nodes[0], 1);
 840
 841         // Make sure to use `get_payment_preimage`
 842         let payment_preimage = nodes[1].node.get_payment_preimage(payment_hash, payment_secret).unwrap();
 843         let mut events = nodes[0].node.get_and_clear_pending_msg_events();
 844         assert_eq!(events.len(), 1);
 845         pass_along_path(&nodes[0], &[&nodes[1]], amt_msat, payment_hash, Some(payment_secret), events.pop().unwrap(), true, Some(payment_preimage));
 846         claim_payment_along_route(&nodes[0], &[&[&nodes[1]]], false, payment_preimage);
 847 }