_ Git - rust-lightning/blob - fuzz/src/chanmon_consistency.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 //! Test that monitor update failures don't get our channel state out of sync.
  11 //! One of the biggest concern with the monitor update failure handling code is that messages
  12 //! resent after monitor updating is restored are delivered out-of-order, resulting in
  13 //! commitment_signed messages having "invalid signatures".
  14 //! To test this we stand up a network of three nodes and read bytes from the fuzz input to denote
  15 //! actions such as sending payments, handling events, or changing monitor update return values on
  16 //! a per-node basis. This should allow it to find any cases where the ordering of actions results
  17 //! in us getting out of sync with ourselves, and, assuming at least one of our recieve- or
  18 //! send-side handling is correct, other peers. We consider it a failure if any action results in a
  19 //! channel being force-closed.
  20
  21 use bitcoin::blockdata::block::BlockHeader;
  22 use bitcoin::blockdata::transaction::{Transaction, TxOut};
  23 use bitcoin::blockdata::script::{Builder, Script};
  24 use bitcoin::blockdata::opcodes;
  25 use bitcoin::network::constants::Network;
  26
  27 use bitcoin::hashes::Hash as TraitImport;
  28 use bitcoin::hashes::sha256::Hash as Sha256;
  29 use bitcoin::hash_types::{BlockHash, WPubkeyHash};
  30
  31 use lightning::chain;
  32 use lightning::chain::chainmonitor;
  33 use lightning::chain::channelmonitor;
  34 use lightning::chain::channelmonitor::{ChannelMonitor, ChannelMonitorUpdateErr, MonitorEvent};
  35 use lightning::chain::transaction::OutPoint;
  36 use lightning::chain::chaininterface::{BroadcasterInterface, ConfirmationTarget, FeeEstimator};
  37 use lightning::chain::keysinterface::{KeysInterface, InMemorySigner};
  38 use lightning::ln::channelmanager::{ChannelManager, PaymentHash, PaymentPreimage, PaymentSecret, PaymentSendFailure, ChannelManagerReadArgs};
  39 use lightning::ln::features::{ChannelFeatures, InitFeatures, NodeFeatures};
  40 use lightning::ln::msgs::{CommitmentUpdate, ChannelMessageHandler, DecodeError, ErrorAction, UpdateAddHTLC, Init};
  41 use lightning::util::enforcing_trait_impls::{EnforcingSigner, INITIAL_REVOKED_COMMITMENT_NUMBER};
  42 use lightning::util::errors::APIError;
  43 use lightning::util::events;
  44 use lightning::util::logger::Logger;
  45 use lightning::util::config::UserConfig;
  46 use lightning::util::events::{EventsProvider, MessageSendEventsProvider};
  47 use lightning::util::ser::{Readable, ReadableArgs, Writeable, Writer};
  48 use lightning::util::test_utils::OnlyReadsKeysInterface;
  49 use lightning::routing::router::{Route, RouteHop};
  50
  51
  52 use utils::test_logger;
  53 use utils::test_persister::TestPersister;
  54
  55 use bitcoin::secp256k1::key::{PublicKey,SecretKey};
  56 use bitcoin::secp256k1::Secp256k1;
  57
  58 use std::mem;
  59 use std::cmp::Ordering;
  60 use std::collections::{HashSet, hash_map, HashMap};
  61 use std::sync::{Arc,Mutex};
  62 use std::sync::atomic;
  63 use std::io::Cursor;
  64
  65 struct FuzzEstimator {}
  66 impl FeeEstimator for FuzzEstimator {
  67         fn get_est_sat_per_1000_weight(&self, _: ConfirmationTarget) -> u32 {
  68                 253
  69         }
  70 }
  71
  72 pub struct TestBroadcaster {}
  73 impl BroadcasterInterface for TestBroadcaster {
  74         fn broadcast_transaction(&self, _tx: &Transaction) { }
  75 }
  76
  77 pub struct VecWriter(pub Vec<u8>);
  78 impl Writer for VecWriter {
  79         fn write_all(&mut self, buf: &[u8]) -> Result<(), ::std::io::Error> {
  80                 self.0.extend_from_slice(buf);
  81                 Ok(())
  82         }
  83         fn size_hint(&mut self, size: usize) {
  84                 self.0.reserve_exact(size);
  85         }
  86 }
  87
  88 struct TestChainMonitor {
  89         pub logger: Arc<dyn Logger>,
  90         pub chain_monitor: Arc<chainmonitor::ChainMonitor<EnforcingSigner, Arc<dyn chain::Filter>, Arc<TestBroadcaster>, Arc<FuzzEstimator>, Arc<dyn Logger>, Arc<TestPersister>>>,
  91         pub update_ret: Mutex<Result<(), channelmonitor::ChannelMonitorUpdateErr>>,
  92         // If we reload a node with an old copy of ChannelMonitors, the ChannelManager deserialization
  93         // logic will automatically force-close our channels for us (as we don't have an up-to-date
  94         // monitor implying we are not able to punish misbehaving counterparties). Because this test
  95         // "fails" if we ever force-close a channel, we avoid doing so, always saving the latest
  96         // fully-serialized monitor state here, as well as the corresponding update_id.
  97         pub latest_monitors: Mutex<HashMap<OutPoint, (u64, Vec<u8>)>>,
  98         pub should_update_manager: atomic::AtomicBool,
  99 }
 100 impl TestChainMonitor {
 101         pub fn new(broadcaster: Arc<TestBroadcaster>, logger: Arc<dyn Logger>, feeest: Arc<FuzzEstimator>, persister: Arc<TestPersister>) -> Self {
 102                 Self {
 103                         chain_monitor: Arc::new(chainmonitor::ChainMonitor::new(None, broadcaster, logger.clone(), feeest, persister)),
 104                         logger,
 105                         update_ret: Mutex::new(Ok(())),
 106                         latest_monitors: Mutex::new(HashMap::new()),
 107                         should_update_manager: atomic::AtomicBool::new(false),
 108                 }
 109         }
 110 }
 111 impl chain::Watch<EnforcingSigner> for TestChainMonitor {
 112         fn watch_channel(&self, funding_txo: OutPoint, monitor: channelmonitor::ChannelMonitor<EnforcingSigner>) -> Result<(), channelmonitor::ChannelMonitorUpdateErr> {
 113                 let mut ser = VecWriter(Vec::new());
 114                 monitor.write(&mut ser).unwrap();
 115                 if let Some(_) = self.latest_monitors.lock().unwrap().insert(funding_txo, (monitor.get_latest_update_id(), ser.0)) {
 116                         panic!("Already had monitor pre-watch_channel");
 117                 }
 118                 self.should_update_manager.store(true, atomic::Ordering::Relaxed);
 119                 assert!(self.chain_monitor.watch_channel(funding_txo, monitor).is_ok());
 120                 self.update_ret.lock().unwrap().clone()
 121         }
 122
 123         fn update_channel(&self, funding_txo: OutPoint, update: channelmonitor::ChannelMonitorUpdate) -> Result<(), channelmonitor::ChannelMonitorUpdateErr> {
 124                 let mut map_lock = self.latest_monitors.lock().unwrap();
 125                 let mut map_entry = match map_lock.entry(funding_txo) {
 126                         hash_map::Entry::Occupied(entry) => entry,
 127                         hash_map::Entry::Vacant(_) => panic!("Didn't have monitor on update call"),
 128                 };
 129                 let deserialized_monitor = <(Option<BlockHash>, channelmonitor::ChannelMonitor<EnforcingSigner>)>::
 130                         read(&mut Cursor::new(&map_entry.get().1), &OnlyReadsKeysInterface {}).unwrap().1;
 131                 deserialized_monitor.update_monitor(&update, &&TestBroadcaster{}, &&FuzzEstimator{}, &self.logger).unwrap();
 132                 let mut ser = VecWriter(Vec::new());
 133                 deserialized_monitor.write(&mut ser).unwrap();
 134                 map_entry.insert((update.update_id, ser.0));
 135                 self.should_update_manager.store(true, atomic::Ordering::Relaxed);
 136                 self.update_ret.lock().unwrap().clone()
 137         }
 138
 139         fn release_pending_monitor_events(&self) -> Vec<MonitorEvent> {
 140                 return self.chain_monitor.release_pending_monitor_events();
 141         }
 142 }
 143
 144 struct KeyProvider {
 145         node_id: u8,
 146         rand_bytes_id: atomic::AtomicU8,
 147         revoked_commitments: Mutex<HashMap<[u8;32], Arc<Mutex<u64>>>>,
 148 }
 149 impl KeysInterface for KeyProvider {
 150         type Signer = EnforcingSigner;
 151
 152         fn get_node_secret(&self) -> SecretKey {
 153                 SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, self.node_id]).unwrap()
 154         }
 155
 156         fn get_destination_script(&self) -> Script {
 157                 let secp_ctx = Secp256k1::signing_only();
 158                 let channel_monitor_claim_key = SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, self.node_id]).unwrap();
 159                 let our_channel_monitor_claim_key_hash = WPubkeyHash::hash(&PublicKey::from_secret_key(&secp_ctx, &channel_monitor_claim_key).serialize());
 160                 Builder::new().push_opcode(opcodes::all::OP_PUSHBYTES_0).push_slice(&our_channel_monitor_claim_key_hash[..]).into_script()
 161         }
 162
 163         fn get_shutdown_pubkey(&self) -> PublicKey {
 164                 let secp_ctx = Secp256k1::signing_only();
 165                 PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, self.node_id]).unwrap())
 166         }
 167
 168         fn get_channel_signer(&self, _inbound: bool, channel_value_satoshis: u64) -> EnforcingSigner {
 169                 let secp_ctx = Secp256k1::signing_only();
 170                 let id = self.rand_bytes_id.fetch_add(1, atomic::Ordering::Relaxed);
 171                 let keys = InMemorySigner::new(
 172                         &secp_ctx,
 173                         SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, self.node_id]).unwrap(),
 174                         SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 5, self.node_id]).unwrap(),
 175                         SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 6, self.node_id]).unwrap(),
 176                         SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 7, self.node_id]).unwrap(),
 177                         SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, self.node_id]).unwrap(),
 178                         [id, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 9, self.node_id],
 179                         channel_value_satoshis,
 180                         [0; 32],
 181                 );
 182                 let revoked_commitment = self.make_revoked_commitment_cell(keys.commitment_seed);
 183                 EnforcingSigner::new_with_revoked(keys, revoked_commitment, false)
 184         }
 185
 186         fn get_secure_random_bytes(&self) -> [u8; 32] {
 187                 let id = self.rand_bytes_id.fetch_add(1, atomic::Ordering::Relaxed);
 188                 [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, id, 11, self.node_id]
 189         }
 190
 191         fn read_chan_signer(&self, buffer: &[u8]) -> Result<Self::Signer, DecodeError> {
 192                 let mut reader = std::io::Cursor::new(buffer);
 193
 194                 let inner: InMemorySigner = Readable::read(&mut reader)?;
 195                 let revoked_commitment = self.make_revoked_commitment_cell(inner.commitment_seed);
 196
 197                 let last_commitment_number = Readable::read(&mut reader)?;
 198
 199                 Ok(EnforcingSigner {
 200                         inner,
 201                         last_commitment_number: Arc::new(Mutex::new(last_commitment_number)),
 202                         revoked_commitment,
 203                         disable_revocation_policy_check: false,
 204                 })
 205         }
 206 }
 207
 208 impl KeyProvider {
 209         fn make_revoked_commitment_cell(&self, commitment_seed: [u8; 32]) -> Arc<Mutex<u64>> {
 210                 let mut revoked_commitments = self.revoked_commitments.lock().unwrap();
 211                 if !revoked_commitments.contains_key(&commitment_seed) {
 212                         revoked_commitments.insert(commitment_seed, Arc::new(Mutex::new(INITIAL_REVOKED_COMMITMENT_NUMBER)));
 213                 }
 214                 let cell = revoked_commitments.get(&commitment_seed).unwrap();
 215                 Arc::clone(cell)
 216         }
 217 }
 218
 219 #[inline]
 220 fn check_api_err(api_err: APIError) {
 221         match api_err {
 222                 APIError::APIMisuseError { .. } => panic!("We can't misuse the API"),
 223                 APIError::FeeRateTooHigh { .. } => panic!("We can't send too much fee?"),
 224                 APIError::RouteError { .. } => panic!("Our routes should work"),
 225                 APIError::ChannelUnavailable { err } => {
 226                         // Test the error against a list of errors we can hit, and reject
 227                         // all others. If you hit this panic, the list of acceptable errors
 228                         // is probably just stale and you should add new messages here.
 229                         match err.as_str() {
 230                                 "Peer for first hop currently disconnected/pending monitor update!" => {},
 231                                 _ if err.starts_with("Cannot push more than their max accepted HTLCs ") => {},
 232                                 _ if err.starts_with("Cannot send value that would put us over the max HTLC value in flight our peer will accept ") => {},
 233                                 _ if err.starts_with("Cannot send value that would put our balance under counterparty-announced channel reserve value") => {},
 234                                 _ if err.starts_with("Cannot send value that would overdraw remaining funds.") => {},
 235                                 _ if err.starts_with("Cannot send value that would not leave enough to pay for fees.") => {},
 236                                 _ => panic!(err),
 237                         }
 238                 },
 239                 APIError::MonitorUpdateFailed => {
 240                         // We can (obviously) temp-fail a monitor update
 241                 },
 242         }
 243 }
 244 #[inline]
 245 fn check_payment_err(send_err: PaymentSendFailure) {
 246         match send_err {
 247                 PaymentSendFailure::ParameterError(api_err) => check_api_err(api_err),
 248                 PaymentSendFailure::PathParameterError(per_path_results) => {
 249                         for res in per_path_results { if let Err(api_err) = res { check_api_err(api_err); } }
 250                 },
 251                 PaymentSendFailure::AllFailedRetrySafe(per_path_results) => {
 252                         for api_err in per_path_results { check_api_err(api_err); }
 253                 },
 254                 PaymentSendFailure::PartialFailure(per_path_results) => {
 255                         for res in per_path_results { if let Err(api_err) = res { check_api_err(api_err); } }
 256                 },
 257         }
 258 }
 259
 260 type ChanMan = ChannelManager<EnforcingSigner, Arc<TestChainMonitor>, Arc<TestBroadcaster>, Arc<KeyProvider>, Arc<FuzzEstimator>, Arc<dyn Logger>>;
 261
 262 #[inline]
 263 fn send_payment(source: &ChanMan, dest: &ChanMan, dest_chan_id: u64, amt: u64, payment_id: &mut u8) -> bool {
 264         let payment_hash = Sha256::hash(&[*payment_id; 1]);
 265         *payment_id = payment_id.wrapping_add(1);
 266         if let Err(err) = source.send_payment(&Route {
 267                 paths: vec![vec![RouteHop {
 268                         pubkey: dest.get_our_node_id(),
 269                         node_features: NodeFeatures::empty(),
 270                         short_channel_id: dest_chan_id,
 271                         channel_features: ChannelFeatures::empty(),
 272                         fee_msat: amt,
 273                         cltv_expiry_delta: 200,
 274                 }]],
 275         }, PaymentHash(payment_hash.into_inner()), &None) {
 276                 check_payment_err(err);
 277                 false
 278         } else { true }
 279 }
 280 #[inline]
 281 fn send_hop_payment(source: &ChanMan, middle: &ChanMan, middle_chan_id: u64, dest: &ChanMan, dest_chan_id: u64, amt: u64, payment_id: &mut u8) -> bool {
 282         let payment_hash = Sha256::hash(&[*payment_id; 1]);
 283         *payment_id = payment_id.wrapping_add(1);
 284         if let Err(err) = source.send_payment(&Route {
 285                 paths: vec![vec![RouteHop {
 286                         pubkey: middle.get_our_node_id(),
 287                         node_features: NodeFeatures::empty(),
 288                         short_channel_id: middle_chan_id,
 289                         channel_features: ChannelFeatures::empty(),
 290                         fee_msat: 50000,
 291                         cltv_expiry_delta: 100,
 292                 },RouteHop {
 293                         pubkey: dest.get_our_node_id(),
 294                         node_features: NodeFeatures::empty(),
 295                         short_channel_id: dest_chan_id,
 296                         channel_features: ChannelFeatures::empty(),
 297                         fee_msat: amt,
 298                         cltv_expiry_delta: 200,
 299                 }]],
 300         }, PaymentHash(payment_hash.into_inner()), &None) {
 301                 check_payment_err(err);
 302                 false
 303         } else { true }
 304 }
 305
 306 #[inline]
 307 pub fn do_test<Out: test_logger::Output>(data: &[u8], out: Out) {
 308         let fee_est = Arc::new(FuzzEstimator{});
 309         let broadcast = Arc::new(TestBroadcaster{});
 310
 311         macro_rules! make_node {
 312                 ($node_id: expr) => { {
 313                         let logger: Arc<dyn Logger> = Arc::new(test_logger::TestLogger::new($node_id.to_string(), out.clone()));
 314                         let monitor = Arc::new(TestChainMonitor::new(broadcast.clone(), logger.clone(), fee_est.clone(), Arc::new(TestPersister{})));
 315
 316                         let keys_manager = Arc::new(KeyProvider { node_id: $node_id, rand_bytes_id: atomic::AtomicU8::new(0), revoked_commitments: Mutex::new(HashMap::new()) });
 317                         let mut config = UserConfig::default();
 318                         config.channel_options.fee_proportional_millionths = 0;
 319                         config.channel_options.announced_channel = true;
 320                         config.peer_channel_config_limits.min_dust_limit_satoshis = 0;
 321                         (ChannelManager::new(Network::Bitcoin, fee_est.clone(), monitor.clone(), broadcast.clone(), Arc::clone(&logger), keys_manager.clone(), config, 0),
 322                         monitor, keys_manager)
 323                 } }
 324         }
 325
 326         macro_rules! reload_node {
 327                 ($ser: expr, $node_id: expr, $old_monitors: expr, $keys_manager: expr) => { {
 328                     let keys_manager = Arc::clone(& $keys_manager);
 329                         let logger: Arc<dyn Logger> = Arc::new(test_logger::TestLogger::new($node_id.to_string(), out.clone()));
 330                         let chain_monitor = Arc::new(TestChainMonitor::new(broadcast.clone(), logger.clone(), fee_est.clone(), Arc::new(TestPersister{})));
 331
 332                         let mut config = UserConfig::default();
 333                         config.channel_options.fee_proportional_millionths = 0;
 334                         config.channel_options.announced_channel = true;
 335                         config.peer_channel_config_limits.min_dust_limit_satoshis = 0;
 336
 337                         let mut monitors = HashMap::new();
 338                         let mut old_monitors = $old_monitors.latest_monitors.lock().unwrap();
 339                         for (outpoint, (update_id, monitor_ser)) in old_monitors.drain() {
 340                                 monitors.insert(outpoint, <(Option<BlockHash>, ChannelMonitor<EnforcingSigner>)>::read(&mut Cursor::new(&monitor_ser), &OnlyReadsKeysInterface {}).expect("Failed to read monitor").1);
 341                                 chain_monitor.latest_monitors.lock().unwrap().insert(outpoint, (update_id, monitor_ser));
 342                         }
 343                         let mut monitor_refs = HashMap::new();
 344                         for (outpoint, monitor) in monitors.iter_mut() {
 345                                 monitor_refs.insert(*outpoint, monitor);
 346                         }
 347
 348                         let read_args = ChannelManagerReadArgs {
 349                                 keys_manager,
 350                                 fee_estimator: fee_est.clone(),
 351                                 chain_monitor: chain_monitor.clone(),
 352                                 tx_broadcaster: broadcast.clone(),
 353                                 logger,
 354                                 default_config: config,
 355                                 channel_monitors: monitor_refs,
 356                         };
 357
 358                         (<(Option<BlockHash>, ChanMan)>::read(&mut Cursor::new(&$ser.0), read_args).expect("Failed to read manager").1, chain_monitor)
 359                 } }
 360         }
 361
 362         let mut channel_txn = Vec::new();
 363         macro_rules! make_channel {
 364                 ($source: expr, $dest: expr, $chan_id: expr) => { {
 365                         $source.create_channel($dest.get_our_node_id(), 100_000, 42, 0, None).unwrap();
 366                         let open_channel = {
 367                                 let events = $source.get_and_clear_pending_msg_events();
 368                                 assert_eq!(events.len(), 1);
 369                                 if let events::MessageSendEvent::SendOpenChannel { ref msg, .. } = events[0] {
 370                                         msg.clone()
 371                                 } else { panic!("Wrong event type"); }
 372                         };
 373
 374                         $dest.handle_open_channel(&$source.get_our_node_id(), InitFeatures::known(), &open_channel);
 375                         let accept_channel = {
 376                                 let events = $dest.get_and_clear_pending_msg_events();
 377                                 assert_eq!(events.len(), 1);
 378                                 if let events::MessageSendEvent::SendAcceptChannel { ref msg, .. } = events[0] {
 379                                         msg.clone()
 380                                 } else { panic!("Wrong event type"); }
 381                         };
 382
 383                         $source.handle_accept_channel(&$dest.get_our_node_id(), InitFeatures::known(), &accept_channel);
 384                         let funding_output;
 385                         {
 386                                 let events = $source.get_and_clear_pending_events();
 387                                 assert_eq!(events.len(), 1);
 388                                 if let events::Event::FundingGenerationReady { ref temporary_channel_id, ref channel_value_satoshis, ref output_script, .. } = events[0] {
 389                                         let tx = Transaction { version: $chan_id, lock_time: 0, input: Vec::new(), output: vec![TxOut {
 390                                                 value: *channel_value_satoshis, script_pubkey: output_script.clone(),
 391                                         }]};
 392                                         funding_output = OutPoint { txid: tx.txid(), index: 0 };
 393                                         $source.funding_transaction_generated(&temporary_channel_id, funding_output);
 394                                         channel_txn.push(tx);
 395                                 } else { panic!("Wrong event type"); }
 396                         }
 397
 398                         let funding_created = {
 399                                 let events = $source.get_and_clear_pending_msg_events();
 400                                 assert_eq!(events.len(), 1);
 401                                 if let events::MessageSendEvent::SendFundingCreated { ref msg, .. } = events[0] {
 402                                         msg.clone()
 403                                 } else { panic!("Wrong event type"); }
 404                         };
 405                         $dest.handle_funding_created(&$source.get_our_node_id(), &funding_created);
 406
 407                         let funding_signed = {
 408                                 let events = $dest.get_and_clear_pending_msg_events();
 409                                 assert_eq!(events.len(), 1);
 410                                 if let events::MessageSendEvent::SendFundingSigned { ref msg, .. } = events[0] {
 411                                         msg.clone()
 412                                 } else { panic!("Wrong event type"); }
 413                         };
 414                         $source.handle_funding_signed(&$dest.get_our_node_id(), &funding_signed);
 415
 416                         {
 417                                 let events = $source.get_and_clear_pending_events();
 418                                 assert_eq!(events.len(), 1);
 419                                 if let events::Event::FundingBroadcastSafe { .. } = events[0] {
 420                                 } else { panic!("Wrong event type"); }
 421                         }
 422                         funding_output
 423                 } }
 424         }
 425
 426         macro_rules! confirm_txn {
 427                 ($node: expr) => { {
 428                         let mut header = BlockHeader { version: 0x20000000, prev_blockhash: Default::default(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
 429                         let txdata: Vec<_> = channel_txn.iter().enumerate().map(|(i, tx)| (i + 1, tx)).collect();
 430                         $node.block_connected(&header, &txdata, 1);
 431                         for i in 2..100 {
 432                                 header = BlockHeader { version: 0x20000000, prev_blockhash: header.block_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
 433                                 $node.block_connected(&header, &[], i);
 434                         }
 435                 } }
 436         }
 437
 438         macro_rules! lock_fundings {
 439                 ($nodes: expr) => { {
 440                         let mut node_events = Vec::new();
 441                         for node in $nodes.iter() {
 442                                 node_events.push(node.get_and_clear_pending_msg_events());
 443                         }
 444                         for (idx, node_event) in node_events.iter().enumerate() {
 445                                 for event in node_event {
 446                                         if let events::MessageSendEvent::SendFundingLocked { ref node_id, ref msg } = event {
 447                                                 for node in $nodes.iter() {
 448                                                         if node.get_our_node_id() == *node_id {
 449                                                                 node.handle_funding_locked(&$nodes[idx].get_our_node_id(), msg);
 450                                                         }
 451                                                 }
 452                                         } else { panic!("Wrong event type"); }
 453                                 }
 454                         }
 455
 456                         for node in $nodes.iter() {
 457                                 let events = node.get_and_clear_pending_msg_events();
 458                                 for event in events {
 459                                         if let events::MessageSendEvent::SendAnnouncementSignatures { .. } = event {
 460                                         } else { panic!("Wrong event type"); }
 461                                 }
 462                         }
 463                 } }
 464         }
 465
 466         // 3 nodes is enough to hit all the possible cases, notably unknown-source-unknown-dest
 467         // forwarding.
 468         let (node_a, mut monitor_a, keys_manager_a) = make_node!(0);
 469         let (node_b, mut monitor_b, keys_manager_b) = make_node!(1);
 470         let (node_c, mut monitor_c, keys_manager_c) = make_node!(2);
 471
 472         let mut nodes = [node_a, node_b, node_c];
 473
 474         let chan_1_funding = make_channel!(nodes[0], nodes[1], 0);
 475         let chan_2_funding = make_channel!(nodes[1], nodes[2], 1);
 476
 477         for node in nodes.iter() {
 478                 confirm_txn!(node);
 479         }
 480
 481         lock_fundings!(nodes);
 482
 483         let chan_a = nodes[0].list_usable_channels()[0].short_channel_id.unwrap();
 484         let chan_b = nodes[2].list_usable_channels()[0].short_channel_id.unwrap();
 485
 486         let mut payment_id: u8 = 0;
 487
 488         let mut chan_a_disconnected = false;
 489         let mut chan_b_disconnected = false;
 490         let mut ba_events = Vec::new();
 491         let mut bc_events = Vec::new();
 492
 493         let mut node_a_ser = VecWriter(Vec::new());
 494         nodes[0].write(&mut node_a_ser).unwrap();
 495         let mut node_b_ser = VecWriter(Vec::new());
 496         nodes[1].write(&mut node_b_ser).unwrap();
 497         let mut node_c_ser = VecWriter(Vec::new());
 498         nodes[2].write(&mut node_c_ser).unwrap();
 499
 500         macro_rules! test_return {
 501                 () => { {
 502                         assert_eq!(nodes[0].list_channels().len(), 1);
 503                         assert_eq!(nodes[1].list_channels().len(), 2);
 504                         assert_eq!(nodes[2].list_channels().len(), 1);
 505                         return;
 506                 } }
 507         }
 508
 509         let mut read_pos = 0;
 510         macro_rules! get_slice {
 511                 ($len: expr) => {
 512                         {
 513                                 let slice_len = $len as usize;
 514                                 if data.len() < read_pos + slice_len {
 515                                         test_return!();
 516                                 }
 517                                 read_pos += slice_len;
 518                                 &data[read_pos - slice_len..read_pos]
 519                         }
 520                 }
 521         }
 522
 523         loop {
 524                 macro_rules! send_payment_with_secret {
 525                         ($source: expr, $middle: expr, $dest: expr) => { {
 526                                 let payment_hash = Sha256::hash(&[payment_id; 1]);
 527                                 payment_id = payment_id.wrapping_add(1);
 528                                 let payment_secret = Sha256::hash(&[payment_id; 1]);
 529                                 payment_id = payment_id.wrapping_add(1);
 530                                 if let Err(err) = $source.send_payment(&Route {
 531                                         paths: vec![vec![RouteHop {
 532                                                 pubkey: $middle.0.get_our_node_id(),
 533                                                 node_features: NodeFeatures::empty(),
 534                                                 short_channel_id: $middle.1,
 535                                                 channel_features: ChannelFeatures::empty(),
 536                                                 fee_msat: 50_000,
 537                                                 cltv_expiry_delta: 100,
 538                                         },RouteHop {
 539                                                 pubkey: $dest.0.get_our_node_id(),
 540                                                 node_features: NodeFeatures::empty(),
 541                                                 short_channel_id: $dest.1,
 542                                                 channel_features: ChannelFeatures::empty(),
 543                                                 fee_msat: 10_000_000,
 544                                                 cltv_expiry_delta: 200,
 545                                         }],vec![RouteHop {
 546                                                 pubkey: $middle.0.get_our_node_id(),
 547                                                 node_features: NodeFeatures::empty(),
 548                                                 short_channel_id: $middle.1,
 549                                                 channel_features: ChannelFeatures::empty(),
 550                                                 fee_msat: 50_000,
 551                                                 cltv_expiry_delta: 100,
 552                                         },RouteHop {
 553                                                 pubkey: $dest.0.get_our_node_id(),
 554                                                 node_features: NodeFeatures::empty(),
 555                                                 short_channel_id: $dest.1,
 556                                                 channel_features: ChannelFeatures::empty(),
 557                                                 fee_msat: 10_000_000,
 558                                                 cltv_expiry_delta: 200,
 559                                         }]],
 560                                 }, PaymentHash(payment_hash.into_inner()), &Some(PaymentSecret(payment_secret.into_inner()))) {
 561                                         check_payment_err(err);
 562                                 }
 563                         } }
 564                 }
 565
 566                 macro_rules! process_msg_events {
 567                         ($node: expr, $corrupt_forward: expr) => { {
 568                                 let events = if $node == 1 {
 569                                         let mut new_events = Vec::new();
 570                                         mem::swap(&mut new_events, &mut ba_events);
 571                                         new_events.extend_from_slice(&bc_events[..]);
 572                                         bc_events.clear();
 573                                         new_events
 574                                 } else { Vec::new() };
 575                                 let mut had_events = false;
 576                                 for event in events.iter().chain(nodes[$node].get_and_clear_pending_msg_events().iter()) {
 577                                         had_events = true;
 578                                         match event {
 579                                                 events::MessageSendEvent::UpdateHTLCs { ref node_id, updates: CommitmentUpdate { ref update_add_htlcs, ref update_fail_htlcs, ref update_fulfill_htlcs, ref update_fail_malformed_htlcs, ref update_fee, ref commitment_signed } } => {
 580                                                         for dest in nodes.iter() {
 581                                                                 if dest.get_our_node_id() == *node_id {
 582                                                                         assert!(update_fee.is_none());
 583                                                                         for update_add in update_add_htlcs {
 584                                                                                 if !$corrupt_forward {
 585                                                                                         dest.handle_update_add_htlc(&nodes[$node].get_our_node_id(), &update_add);
 586                                                                                 } else {
 587                                                                                         // Corrupt the update_add_htlc message so that its HMAC
 588                                                                                         // check will fail and we generate a
 589                                                                                         // update_fail_malformed_htlc instead of an
 590                                                                                         // update_fail_htlc as we do when we reject a payment.
 591                                                                                         let mut msg_ser = update_add.encode();
 592                                                                                         msg_ser[1000] ^= 0xff;
 593                                                                                         let new_msg = UpdateAddHTLC::read(&mut Cursor::new(&msg_ser)).unwrap();
 594                                                                                         dest.handle_update_add_htlc(&nodes[$node].get_our_node_id(), &new_msg);
 595                                                                                 }
 596                                                                         }
 597                                                                         for update_fulfill in update_fulfill_htlcs {
 598                                                                                 dest.handle_update_fulfill_htlc(&nodes[$node].get_our_node_id(), &update_fulfill);
 599                                                                         }
 600                                                                         for update_fail in update_fail_htlcs {
 601                                                                                 dest.handle_update_fail_htlc(&nodes[$node].get_our_node_id(), &update_fail);
 602                                                                         }
 603                                                                         for update_fail_malformed in update_fail_malformed_htlcs {
 604                                                                                 dest.handle_update_fail_malformed_htlc(&nodes[$node].get_our_node_id(), &update_fail_malformed);
 605                                                                         }
 606                                                                         dest.handle_commitment_signed(&nodes[$node].get_our_node_id(), &commitment_signed);
 607                                                                 }
 608                                                         }
 609                                                 },
 610                                                 events::MessageSendEvent::SendRevokeAndACK { ref node_id, ref msg } => {
 611                                                         for dest in nodes.iter() {
 612                                                                 if dest.get_our_node_id() == *node_id {
 613                                                                         dest.handle_revoke_and_ack(&nodes[$node].get_our_node_id(), msg);
 614                                                                 }
 615                                                         }
 616                                                 },
 617                                                 events::MessageSendEvent::SendChannelReestablish { ref node_id, ref msg } => {
 618                                                         for dest in nodes.iter() {
 619                                                                 if dest.get_our_node_id() == *node_id {
 620                                                                         dest.handle_channel_reestablish(&nodes[$node].get_our_node_id(), msg);
 621                                                                 }
 622                                                         }
 623                                                 },
 624                                                 events::MessageSendEvent::SendFundingLocked { .. } => {
 625                                                         // Can be generated as a reestablish response
 626                                                 },
 627                                                 events::MessageSendEvent::PaymentFailureNetworkUpdate { .. } => {
 628                                                         // Can be generated due to a payment forward being rejected due to a
 629                                                         // channel having previously failed a monitor update
 630                                                 },
 631                                                 _ => panic!("Unhandled message event"),
 632                                         }
 633                                 }
 634                                 had_events
 635                         } }
 636                 }
 637
 638                 macro_rules! drain_msg_events_on_disconnect {
 639                         ($counterparty_id: expr) => { {
 640                                 if $counterparty_id == 0 {
 641                                         for event in nodes[0].get_and_clear_pending_msg_events() {
 642                                                 match event {
 643                                                         events::MessageSendEvent::UpdateHTLCs { .. } => {},
 644                                                         events::MessageSendEvent::SendRevokeAndACK { .. } => {},
 645                                                         events::MessageSendEvent::SendChannelReestablish { .. } => {},
 646                                                         events::MessageSendEvent::SendFundingLocked { .. } => {},
 647                                                         events::MessageSendEvent::PaymentFailureNetworkUpdate { .. } => {},
 648                                                         events::MessageSendEvent::HandleError { action: ErrorAction::IgnoreError, .. } => {},
 649                                                         _ => panic!("Unhandled message event"),
 650                                                 }
 651                                         }
 652                                         ba_events.clear();
 653                                 } else {
 654                                         for event in nodes[2].get_and_clear_pending_msg_events() {
 655                                                 match event {
 656                                                         events::MessageSendEvent::UpdateHTLCs { .. } => {},
 657                                                         events::MessageSendEvent::SendRevokeAndACK { .. } => {},
 658                                                         events::MessageSendEvent::SendChannelReestablish { .. } => {},
 659                                                         events::MessageSendEvent::SendFundingLocked { .. } => {},
 660                                                         events::MessageSendEvent::PaymentFailureNetworkUpdate { .. } => {},
 661                                                         events::MessageSendEvent::HandleError { action: ErrorAction::IgnoreError, .. } => {},
 662                                                         _ => panic!("Unhandled message event"),
 663                                                 }
 664                                         }
 665                                         bc_events.clear();
 666                                 }
 667                                 let mut events = nodes[1].get_and_clear_pending_msg_events();
 668                                 let drop_node_id = if $counterparty_id == 0 { nodes[0].get_our_node_id() } else { nodes[2].get_our_node_id() };
 669                                 let msg_sink = if $counterparty_id == 0 { &mut bc_events } else { &mut ba_events };
 670                                 for event in events.drain(..) {
 671                                         let push = match event {
 672                                                 events::MessageSendEvent::UpdateHTLCs { ref node_id, .. } => {
 673                                                         if *node_id != drop_node_id { true } else { false }
 674                                                 },
 675                                                 events::MessageSendEvent::SendRevokeAndACK { ref node_id, .. } => {
 676                                                         if *node_id != drop_node_id { true } else { false }
 677                                                 },
 678                                                 events::MessageSendEvent::SendChannelReestablish { ref node_id, .. } => {
 679                                                         if *node_id != drop_node_id { true } else { false }
 680                                                 },
 681                                                 events::MessageSendEvent::SendFundingLocked { .. } => false,
 682                                                 events::MessageSendEvent::PaymentFailureNetworkUpdate { .. } => false,
 683                                                 events::MessageSendEvent::HandleError { action: ErrorAction::IgnoreError, .. } => false,
 684                                                 _ => panic!("Unhandled message event"),
 685                                         };
 686                                         if push { msg_sink.push(event); }
 687                                 }
 688                         } }
 689                 }
 690
 691                 macro_rules! process_events {
 692                         ($node: expr, $fail: expr) => { {
 693                                 // In case we get 256 payments we may have a hash collision, resulting in the
 694                                 // second claim/fail call not finding the duplicate-hash HTLC, so we have to
 695                                 // deduplicate the calls here.
 696                                 let mut claim_set = HashSet::new();
 697                                 let mut events = nodes[$node].get_and_clear_pending_events();
 698                                 // Sort events so that PendingHTLCsForwardable get processed last. This avoids a
 699                                 // case where we first process a PendingHTLCsForwardable, then claim/fail on a
 700                                 // PaymentReceived, claiming/failing two HTLCs, but leaving a just-generated
 701                                 // PaymentReceived event for the second HTLC in our pending_events (and breaking
 702                                 // our claim_set deduplication).
 703                                 events.sort_by(|a, b| {
 704                                         if let events::Event::PaymentReceived { .. } = a {
 705                                                 if let events::Event::PendingHTLCsForwardable { .. } = b {
 706                                                         Ordering::Less
 707                                                 } else { Ordering::Equal }
 708                                         } else if let events::Event::PendingHTLCsForwardable { .. } = a {
 709                                                 if let events::Event::PaymentReceived { .. } = b {
 710                                                         Ordering::Greater
 711                                                 } else { Ordering::Equal }
 712                                         } else { Ordering::Equal }
 713                                 });
 714                                 let had_events = !events.is_empty();
 715                                 for event in events.drain(..) {
 716                                         match event {
 717                                                 events::Event::PaymentReceived { payment_hash, payment_secret, amt } => {
 718                                                         if claim_set.insert(payment_hash.0) {
 719                                                                 if $fail {
 720                                                                         assert!(nodes[$node].fail_htlc_backwards(&payment_hash, &payment_secret));
 721                                                                 } else {
 722                                                                         assert!(nodes[$node].claim_funds(PaymentPreimage(payment_hash.0), &payment_secret, amt));
 723                                                                 }
 724                                                         }
 725                                                 },
 726                                                 events::Event::PaymentSent { .. } => {},
 727                                                 events::Event::PaymentFailed { .. } => {},
 728                                                 events::Event::PendingHTLCsForwardable { .. } => {
 729                                                         nodes[$node].process_pending_htlc_forwards();
 730                                                 },
 731                                                 _ => panic!("Unhandled event"),
 732                                         }
 733                                 }
 734                                 had_events
 735                         } }
 736                 }
 737
 738                 match get_slice!(1)[0] {
 739                         // In general, we keep related message groups close together in binary form, allowing
 740                         // bit-twiddling mutations to have similar effects. This is probably overkill, but no
 741                         // harm in doing so.
 742
 743                         0x00 => *monitor_a.update_ret.lock().unwrap() = Err(ChannelMonitorUpdateErr::TemporaryFailure),
 744                         0x01 => *monitor_b.update_ret.lock().unwrap() = Err(ChannelMonitorUpdateErr::TemporaryFailure),
 745                         0x02 => *monitor_c.update_ret.lock().unwrap() = Err(ChannelMonitorUpdateErr::TemporaryFailure),
 746                         0x04 => *monitor_a.update_ret.lock().unwrap() = Ok(()),
 747                         0x05 => *monitor_b.update_ret.lock().unwrap() = Ok(()),
 748                         0x06 => *monitor_c.update_ret.lock().unwrap() = Ok(()),
 749
 750                         0x08 => {
 751                                 if let Some((id, _)) = monitor_a.latest_monitors.lock().unwrap().get(&chan_1_funding) {
 752                                         nodes[0].channel_monitor_updated(&chan_1_funding, *id);
 753                                 }
 754                         },
 755                         0x09 => {
 756                                 if let Some((id, _)) = monitor_b.latest_monitors.lock().unwrap().get(&chan_1_funding) {
 757                                         nodes[1].channel_monitor_updated(&chan_1_funding, *id);
 758                                 }
 759                         },
 760                         0x0a => {
 761                                 if let Some((id, _)) = monitor_b.latest_monitors.lock().unwrap().get(&chan_2_funding) {
 762                                         nodes[1].channel_monitor_updated(&chan_2_funding, *id);
 763                                 }
 764                         },
 765                         0x0b => {
 766                                 if let Some((id, _)) = monitor_c.latest_monitors.lock().unwrap().get(&chan_2_funding) {
 767                                         nodes[2].channel_monitor_updated(&chan_2_funding, *id);
 768                                 }
 769                         },
 770
 771                         0x0c => {
 772                                 if !chan_a_disconnected {
 773                                         nodes[0].peer_disconnected(&nodes[1].get_our_node_id(), false);
 774                                         nodes[1].peer_disconnected(&nodes[0].get_our_node_id(), false);
 775                                         chan_a_disconnected = true;
 776                                         drain_msg_events_on_disconnect!(0);
 777                                 }
 778                         },
 779                         0x0d => {
 780                                 if !chan_b_disconnected {
 781                                         nodes[1].peer_disconnected(&nodes[2].get_our_node_id(), false);
 782                                         nodes[2].peer_disconnected(&nodes[1].get_our_node_id(), false);
 783                                         chan_b_disconnected = true;
 784                                         drain_msg_events_on_disconnect!(2);
 785                                 }
 786                         },
 787                         0x0e => {
 788                                 if chan_a_disconnected {
 789                                         nodes[0].peer_connected(&nodes[1].get_our_node_id(), &Init { features: InitFeatures::empty() });
 790                                         nodes[1].peer_connected(&nodes[0].get_our_node_id(), &Init { features: InitFeatures::empty() });
 791                                         chan_a_disconnected = false;
 792                                 }
 793                         },
 794                         0x0f => {
 795                                 if chan_b_disconnected {
 796                                         nodes[1].peer_connected(&nodes[2].get_our_node_id(), &Init { features: InitFeatures::empty() });
 797                                         nodes[2].peer_connected(&nodes[1].get_our_node_id(), &Init { features: InitFeatures::empty() });
 798                                         chan_b_disconnected = false;
 799                                 }
 800                         },
 801
 802                         0x10 => { process_msg_events!(0, true); },
 803                         0x11 => { process_msg_events!(0, false); },
 804                         0x12 => { process_events!(0, true); },
 805                         0x13 => { process_events!(0, false); },
 806                         0x14 => { process_msg_events!(1, true); },
 807                         0x15 => { process_msg_events!(1, false); },
 808                         0x16 => { process_events!(1, true); },
 809                         0x17 => { process_events!(1, false); },
 810                         0x18 => { process_msg_events!(2, true); },
 811                         0x19 => { process_msg_events!(2, false); },
 812                         0x1a => { process_events!(2, true); },
 813                         0x1b => { process_events!(2, false); },
 814
 815                         0x1c => {
 816                                 if !chan_a_disconnected {
 817                                         nodes[1].peer_disconnected(&nodes[0].get_our_node_id(), false);
 818                                         chan_a_disconnected = true;
 819                                         drain_msg_events_on_disconnect!(0);
 820                                 }
 821                                 let (new_node_a, new_monitor_a) = reload_node!(node_a_ser, 0, monitor_a, keys_manager_a);
 822                                 nodes[0] = new_node_a;
 823                                 monitor_a = new_monitor_a;
 824                         },
 825                         0x1d => {
 826                                 if !chan_a_disconnected {
 827                                         nodes[0].peer_disconnected(&nodes[1].get_our_node_id(), false);
 828                                         chan_a_disconnected = true;
 829                                         nodes[0].get_and_clear_pending_msg_events();
 830                                         ba_events.clear();
 831                                 }
 832                                 if !chan_b_disconnected {
 833                                         nodes[2].peer_disconnected(&nodes[1].get_our_node_id(), false);
 834                                         chan_b_disconnected = true;
 835                                         nodes[2].get_and_clear_pending_msg_events();
 836                                         bc_events.clear();
 837                                 }
 838                                 let (new_node_b, new_monitor_b) = reload_node!(node_b_ser, 1, monitor_b, keys_manager_b);
 839                                 nodes[1] = new_node_b;
 840                                 monitor_b = new_monitor_b;
 841                         },
 842                         0x1e => {
 843                                 if !chan_b_disconnected {
 844                                         nodes[1].peer_disconnected(&nodes[2].get_our_node_id(), false);
 845                                         chan_b_disconnected = true;
 846                                         drain_msg_events_on_disconnect!(2);
 847                                 }
 848                                 let (new_node_c, new_monitor_c) = reload_node!(node_c_ser, 2, monitor_c, keys_manager_c);
 849                                 nodes[2] = new_node_c;
 850                                 monitor_c = new_monitor_c;
 851                         },
 852
 853                         // 1/10th the channel size:
 854                         0x20 => { send_payment(&nodes[0], &nodes[1], chan_a, 10_000_000, &mut payment_id); },
 855                         0x21 => { send_payment(&nodes[1], &nodes[0], chan_a, 10_000_000, &mut payment_id); },
 856                         0x22 => { send_payment(&nodes[1], &nodes[2], chan_b, 10_000_000, &mut payment_id); },
 857                         0x23 => { send_payment(&nodes[2], &nodes[1], chan_b, 10_000_000, &mut payment_id); },
 858                         0x24 => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 10_000_000, &mut payment_id); },
 859                         0x25 => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 10_000_000, &mut payment_id); },
 860
 861                         0x26 => { send_payment_with_secret!(nodes[0], (&nodes[1], chan_a), (&nodes[2], chan_b)); },
 862                         0x27 => { send_payment_with_secret!(nodes[2], (&nodes[1], chan_b), (&nodes[0], chan_a)); },
 863
 864                         0x28 => { send_payment(&nodes[0], &nodes[1], chan_a, 1_000_000, &mut payment_id); },
 865                         0x29 => { send_payment(&nodes[1], &nodes[0], chan_a, 1_000_000, &mut payment_id); },
 866                         0x2a => { send_payment(&nodes[1], &nodes[2], chan_b, 1_000_000, &mut payment_id); },
 867                         0x2b => { send_payment(&nodes[2], &nodes[1], chan_b, 1_000_000, &mut payment_id); },
 868                         0x2c => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 1_000_000, &mut payment_id); },
 869                         0x2d => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 1_000_000, &mut payment_id); },
 870
 871                         0x30 => { send_payment(&nodes[0], &nodes[1], chan_a, 100_000, &mut payment_id); },
 872                         0x31 => { send_payment(&nodes[1], &nodes[0], chan_a, 100_000, &mut payment_id); },
 873                         0x32 => { send_payment(&nodes[1], &nodes[2], chan_b, 100_000, &mut payment_id); },
 874                         0x33 => { send_payment(&nodes[2], &nodes[1], chan_b, 100_000, &mut payment_id); },
 875                         0x34 => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 100_000, &mut payment_id); },
 876                         0x35 => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 100_000, &mut payment_id); },
 877
 878                         0x38 => { send_payment(&nodes[0], &nodes[1], chan_a, 10_000, &mut payment_id); },
 879                         0x39 => { send_payment(&nodes[1], &nodes[0], chan_a, 10_000, &mut payment_id); },
 880                         0x3a => { send_payment(&nodes[1], &nodes[2], chan_b, 10_000, &mut payment_id); },
 881                         0x3b => { send_payment(&nodes[2], &nodes[1], chan_b, 10_000, &mut payment_id); },
 882                         0x3c => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 10_000, &mut payment_id); },
 883                         0x3d => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 10_000, &mut payment_id); },
 884
 885                         0x40 => { send_payment(&nodes[0], &nodes[1], chan_a, 1_000, &mut payment_id); },
 886                         0x41 => { send_payment(&nodes[1], &nodes[0], chan_a, 1_000, &mut payment_id); },
 887                         0x42 => { send_payment(&nodes[1], &nodes[2], chan_b, 1_000, &mut payment_id); },
 888                         0x43 => { send_payment(&nodes[2], &nodes[1], chan_b, 1_000, &mut payment_id); },
 889                         0x44 => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 1_000, &mut payment_id); },
 890                         0x45 => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 1_000, &mut payment_id); },
 891
 892                         0x48 => { send_payment(&nodes[0], &nodes[1], chan_a, 100, &mut payment_id); },
 893                         0x49 => { send_payment(&nodes[1], &nodes[0], chan_a, 100, &mut payment_id); },
 894                         0x4a => { send_payment(&nodes[1], &nodes[2], chan_b, 100, &mut payment_id); },
 895                         0x4b => { send_payment(&nodes[2], &nodes[1], chan_b, 100, &mut payment_id); },
 896                         0x4c => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 100, &mut payment_id); },
 897                         0x4d => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 100, &mut payment_id); },
 898
 899                         0x50 => { send_payment(&nodes[0], &nodes[1], chan_a, 10, &mut payment_id); },
 900                         0x51 => { send_payment(&nodes[1], &nodes[0], chan_a, 10, &mut payment_id); },
 901                         0x52 => { send_payment(&nodes[1], &nodes[2], chan_b, 10, &mut payment_id); },
 902                         0x53 => { send_payment(&nodes[2], &nodes[1], chan_b, 10, &mut payment_id); },
 903                         0x54 => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 10, &mut payment_id); },
 904                         0x55 => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 10, &mut payment_id); },
 905
 906                         0x58 => { send_payment(&nodes[0], &nodes[1], chan_a, 1, &mut payment_id); },
 907                         0x59 => { send_payment(&nodes[1], &nodes[0], chan_a, 1, &mut payment_id); },
 908                         0x5a => { send_payment(&nodes[1], &nodes[2], chan_b, 1, &mut payment_id); },
 909                         0x5b => { send_payment(&nodes[2], &nodes[1], chan_b, 1, &mut payment_id); },
 910                         0x5c => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 1, &mut payment_id); },
 911                         0x5d => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 1, &mut payment_id); },
 912
 913                         0xff => {
 914                                 // Test that no channel is in a stuck state where neither party can send funds even
 915                                 // after we resolve all pending events.
 916                                 // First make sure there are no pending monitor updates, resetting the error state
 917                                 // and calling channel_monitor_updated for each monitor.
 918                                 *monitor_a.update_ret.lock().unwrap() = Ok(());
 919                                 *monitor_b.update_ret.lock().unwrap() = Ok(());
 920                                 *monitor_c.update_ret.lock().unwrap() = Ok(());
 921
 922                                 if let Some((id, _)) = monitor_a.latest_monitors.lock().unwrap().get(&chan_1_funding) {
 923                                         nodes[0].channel_monitor_updated(&chan_1_funding, *id);
 924                                 }
 925                                 if let Some((id, _)) = monitor_b.latest_monitors.lock().unwrap().get(&chan_1_funding) {
 926                                         nodes[1].channel_monitor_updated(&chan_1_funding, *id);
 927                                 }
 928                                 if let Some((id, _)) = monitor_b.latest_monitors.lock().unwrap().get(&chan_2_funding) {
 929                                         nodes[1].channel_monitor_updated(&chan_2_funding, *id);
 930                                 }
 931                                 if let Some((id, _)) = monitor_c.latest_monitors.lock().unwrap().get(&chan_2_funding) {
 932                                         nodes[2].channel_monitor_updated(&chan_2_funding, *id);
 933                                 }
 934
 935                                 // Next, make sure peers are all connected to each other
 936                                 if chan_a_disconnected {
 937                                         nodes[0].peer_connected(&nodes[1].get_our_node_id(), &Init { features: InitFeatures::empty() });
 938                                         nodes[1].peer_connected(&nodes[0].get_our_node_id(), &Init { features: InitFeatures::empty() });
 939                                         chan_a_disconnected = false;
 940                                 }
 941                                 if chan_b_disconnected {
 942                                         nodes[1].peer_connected(&nodes[2].get_our_node_id(), &Init { features: InitFeatures::empty() });
 943                                         nodes[2].peer_connected(&nodes[1].get_our_node_id(), &Init { features: InitFeatures::empty() });
 944                                         chan_b_disconnected = false;
 945                                 }
 946
 947                                 for i in 0..std::usize::MAX {
 948                                         if i == 100 { panic!("It may take may iterations to settle the state, but it should not take forever"); }
 949                                         // Then, make sure any current forwards make their way to their destination
 950                                         if process_msg_events!(0, false) { continue; }
 951                                         if process_msg_events!(1, false) { continue; }
 952                                         if process_msg_events!(2, false) { continue; }
 953                                         // ...making sure any pending PendingHTLCsForwardable events are handled and
 954                                         // payments claimed.
 955                                         if process_events!(0, false) { continue; }
 956                                         if process_events!(1, false) { continue; }
 957                                         if process_events!(2, false) { continue; }
 958                                         break;
 959                                 }
 960
 961                                 // Finally, make sure that at least one end of each channel can make a substantial payment.
 962                                 assert!(
 963                                         send_payment(&nodes[0], &nodes[1], chan_a, 10_000_000, &mut payment_id) ||
 964                                         send_payment(&nodes[1], &nodes[0], chan_a, 10_000_000, &mut payment_id));
 965                                 assert!(
 966                                         send_payment(&nodes[1], &nodes[2], chan_b, 10_000_000, &mut payment_id) ||
 967                                         send_payment(&nodes[2], &nodes[1], chan_b, 10_000_000, &mut payment_id));
 968                         },
 969                         _ => test_return!(),
 970                 }
 971
 972                 node_a_ser.0.clear();
 973                 nodes[0].write(&mut node_a_ser).unwrap();
 974                 monitor_a.should_update_manager.store(false, atomic::Ordering::Relaxed);
 975                 node_b_ser.0.clear();
 976                 nodes[1].write(&mut node_b_ser).unwrap();
 977                 monitor_b.should_update_manager.store(false, atomic::Ordering::Relaxed);
 978                 node_c_ser.0.clear();
 979                 nodes[2].write(&mut node_c_ser).unwrap();
 980                 monitor_c.should_update_manager.store(false, atomic::Ordering::Relaxed);
 981         }
 982 }
 983
 984 pub fn chanmon_consistency_test<Out: test_logger::Output>(data: &[u8], out: Out) {
 985         do_test(data, out);
 986 }
 987
 988 #[no_mangle]
 989 pub extern "C" fn chanmon_consistency_run(data: *const u8, datalen: usize) {
 990         do_test(unsafe { std::slice::from_raw_parts(data, datalen) }, test_logger::DevNull{});
 991 }