_ 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::constants::genesis_block;
  23 use bitcoin::blockdata::transaction::{Transaction, TxOut};
  24 use bitcoin::blockdata::script::{Builder, Script};
  25 use bitcoin::blockdata::opcodes;
  26 use bitcoin::network::constants::Network;
  27
  28 use bitcoin::hashes::Hash as TraitImport;
  29 use bitcoin::hashes::sha256::Hash as Sha256;
  30 use bitcoin::hash_types::{BlockHash, WPubkeyHash};
  31
  32 use lightning::chain;
  33 use lightning::chain::Confirm;
  34 use lightning::chain::chainmonitor;
  35 use lightning::chain::channelmonitor;
  36 use lightning::chain::channelmonitor::{ChannelMonitor, ChannelMonitorUpdateErr, MonitorEvent};
  37 use lightning::chain::transaction::OutPoint;
  38 use lightning::chain::chaininterface::{BroadcasterInterface, ConfirmationTarget, FeeEstimator};
  39 use lightning::chain::keysinterface::{KeysInterface, InMemorySigner};
  40 use lightning::ln::{PaymentHash, PaymentPreimage, PaymentSecret};
  41 use lightning::ln::channelmanager::{BestBlock, ChainParameters, ChannelManager, PaymentSendFailure, ChannelManagerReadArgs};
  42 use lightning::ln::features::{ChannelFeatures, InitFeatures, NodeFeatures};
  43 use lightning::ln::msgs::{CommitmentUpdate, ChannelMessageHandler, DecodeError, ErrorAction, UpdateAddHTLC, Init};
  44 use lightning::util::enforcing_trait_impls::{EnforcingSigner, INITIAL_REVOKED_COMMITMENT_NUMBER};
  45 use lightning::util::errors::APIError;
  46 use lightning::util::events;
  47 use lightning::util::logger::Logger;
  48 use lightning::util::config::UserConfig;
  49 use lightning::util::events::{EventsProvider, MessageSendEventsProvider};
  50 use lightning::util::ser::{Readable, ReadableArgs, Writeable, Writer};
  51 use lightning::util::test_utils::OnlyReadsKeysInterface;
  52 use lightning::routing::router::{Route, RouteHop};
  53
  54
  55 use utils::test_logger;
  56 use utils::test_persister::TestPersister;
  57
  58 use bitcoin::secp256k1::key::{PublicKey,SecretKey};
  59 use bitcoin::secp256k1::Secp256k1;
  60
  61 use std::mem;
  62 use std::cmp::Ordering;
  63 use std::collections::{HashSet, hash_map, HashMap};
  64 use std::sync::{Arc,Mutex};
  65 use std::sync::atomic;
  66 use std::io::Cursor;
  67
  68 struct FuzzEstimator {}
  69 impl FeeEstimator for FuzzEstimator {
  70         fn get_est_sat_per_1000_weight(&self, _: ConfirmationTarget) -> u32 {
  71                 253
  72         }
  73 }
  74
  75 pub struct TestBroadcaster {}
  76 impl BroadcasterInterface for TestBroadcaster {
  77         fn broadcast_transaction(&self, _tx: &Transaction) { }
  78 }
  79
  80 pub struct VecWriter(pub Vec<u8>);
  81 impl Writer for VecWriter {
  82         fn write_all(&mut self, buf: &[u8]) -> Result<(), ::std::io::Error> {
  83                 self.0.extend_from_slice(buf);
  84                 Ok(())
  85         }
  86         fn size_hint(&mut self, size: usize) {
  87                 self.0.reserve_exact(size);
  88         }
  89 }
  90
  91 struct TestChainMonitor {
  92         pub logger: Arc<dyn Logger>,
  93         pub chain_monitor: Arc<chainmonitor::ChainMonitor<EnforcingSigner, Arc<dyn chain::Filter>, Arc<TestBroadcaster>, Arc<FuzzEstimator>, Arc<dyn Logger>, Arc<TestPersister>>>,
  94         pub update_ret: Mutex<Result<(), channelmonitor::ChannelMonitorUpdateErr>>,
  95         // If we reload a node with an old copy of ChannelMonitors, the ChannelManager deserialization
  96         // logic will automatically force-close our channels for us (as we don't have an up-to-date
  97         // monitor implying we are not able to punish misbehaving counterparties). Because this test
  98         // "fails" if we ever force-close a channel, we avoid doing so, always saving the latest
  99         // fully-serialized monitor state here, as well as the corresponding update_id.
 100         pub latest_monitors: Mutex<HashMap<OutPoint, (u64, Vec<u8>)>>,
 101         pub should_update_manager: atomic::AtomicBool,
 102 }
 103 impl TestChainMonitor {
 104         pub fn new(broadcaster: Arc<TestBroadcaster>, logger: Arc<dyn Logger>, feeest: Arc<FuzzEstimator>, persister: Arc<TestPersister>) -> Self {
 105                 Self {
 106                         chain_monitor: Arc::new(chainmonitor::ChainMonitor::new(None, broadcaster, logger.clone(), feeest, persister)),
 107                         logger,
 108                         update_ret: Mutex::new(Ok(())),
 109                         latest_monitors: Mutex::new(HashMap::new()),
 110                         should_update_manager: atomic::AtomicBool::new(false),
 111                 }
 112         }
 113 }
 114 impl chain::Watch<EnforcingSigner> for TestChainMonitor {
 115         fn watch_channel(&self, funding_txo: OutPoint, monitor: channelmonitor::ChannelMonitor<EnforcingSigner>) -> Result<(), channelmonitor::ChannelMonitorUpdateErr> {
 116                 let mut ser = VecWriter(Vec::new());
 117                 monitor.write(&mut ser).unwrap();
 118                 if let Some(_) = self.latest_monitors.lock().unwrap().insert(funding_txo, (monitor.get_latest_update_id(), ser.0)) {
 119                         panic!("Already had monitor pre-watch_channel");
 120                 }
 121                 self.should_update_manager.store(true, atomic::Ordering::Relaxed);
 122                 assert!(self.chain_monitor.watch_channel(funding_txo, monitor).is_ok());
 123                 self.update_ret.lock().unwrap().clone()
 124         }
 125
 126         fn update_channel(&self, funding_txo: OutPoint, update: channelmonitor::ChannelMonitorUpdate) -> Result<(), channelmonitor::ChannelMonitorUpdateErr> {
 127                 let mut map_lock = self.latest_monitors.lock().unwrap();
 128                 let mut map_entry = match map_lock.entry(funding_txo) {
 129                         hash_map::Entry::Occupied(entry) => entry,
 130                         hash_map::Entry::Vacant(_) => panic!("Didn't have monitor on update call"),
 131                 };
 132                 let deserialized_monitor = <(BlockHash, channelmonitor::ChannelMonitor<EnforcingSigner>)>::
 133                         read(&mut Cursor::new(&map_entry.get().1), &OnlyReadsKeysInterface {}).unwrap().1;
 134                 deserialized_monitor.update_monitor(&update, &&TestBroadcaster{}, &&FuzzEstimator{}, &self.logger).unwrap();
 135                 let mut ser = VecWriter(Vec::new());
 136                 deserialized_monitor.write(&mut ser).unwrap();
 137                 map_entry.insert((update.update_id, ser.0));
 138                 self.should_update_manager.store(true, atomic::Ordering::Relaxed);
 139                 self.update_ret.lock().unwrap().clone()
 140         }
 141
 142         fn release_pending_monitor_events(&self) -> Vec<MonitorEvent> {
 143                 return self.chain_monitor.release_pending_monitor_events();
 144         }
 145 }
 146
 147 struct KeyProvider {
 148         node_id: u8,
 149         rand_bytes_id: atomic::AtomicU8,
 150         revoked_commitments: Mutex<HashMap<[u8;32], Arc<Mutex<u64>>>>,
 151 }
 152 impl KeysInterface for KeyProvider {
 153         type Signer = EnforcingSigner;
 154
 155         fn get_node_secret(&self) -> SecretKey {
 156                 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()
 157         }
 158
 159         fn get_destination_script(&self) -> Script {
 160                 let secp_ctx = Secp256k1::signing_only();
 161                 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();
 162                 let our_channel_monitor_claim_key_hash = WPubkeyHash::hash(&PublicKey::from_secret_key(&secp_ctx, &channel_monitor_claim_key).serialize());
 163                 Builder::new().push_opcode(opcodes::all::OP_PUSHBYTES_0).push_slice(&our_channel_monitor_claim_key_hash[..]).into_script()
 164         }
 165
 166         fn get_shutdown_pubkey(&self) -> PublicKey {
 167                 let secp_ctx = Secp256k1::signing_only();
 168                 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())
 169         }
 170
 171         fn get_channel_signer(&self, _inbound: bool, channel_value_satoshis: u64) -> EnforcingSigner {
 172                 let secp_ctx = Secp256k1::signing_only();
 173                 let id = self.rand_bytes_id.fetch_add(1, atomic::Ordering::Relaxed);
 174                 let keys = InMemorySigner::new(
 175                         &secp_ctx,
 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, 4, 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, 5, self.node_id]).unwrap(),
 178                         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(),
 179                         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(),
 180                         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(),
 181                         [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],
 182                         channel_value_satoshis,
 183                         [0; 32],
 184                 );
 185                 let revoked_commitment = self.make_revoked_commitment_cell(keys.commitment_seed);
 186                 EnforcingSigner::new_with_revoked(keys, revoked_commitment, false)
 187         }
 188
 189         fn get_secure_random_bytes(&self) -> [u8; 32] {
 190                 let id = self.rand_bytes_id.fetch_add(1, atomic::Ordering::Relaxed);
 191                 [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]
 192         }
 193
 194         fn read_chan_signer(&self, buffer: &[u8]) -> Result<Self::Signer, DecodeError> {
 195                 let mut reader = std::io::Cursor::new(buffer);
 196
 197                 let inner: InMemorySigner = Readable::read(&mut reader)?;
 198                 let revoked_commitment = self.make_revoked_commitment_cell(inner.commitment_seed);
 199
 200                 let last_commitment_number = Readable::read(&mut reader)?;
 201
 202                 Ok(EnforcingSigner {
 203                         inner,
 204                         last_commitment_number: Arc::new(Mutex::new(last_commitment_number)),
 205                         revoked_commitment,
 206                         disable_revocation_policy_check: false,
 207                 })
 208         }
 209 }
 210
 211 impl KeyProvider {
 212         fn make_revoked_commitment_cell(&self, commitment_seed: [u8; 32]) -> Arc<Mutex<u64>> {
 213                 let mut revoked_commitments = self.revoked_commitments.lock().unwrap();
 214                 if !revoked_commitments.contains_key(&commitment_seed) {
 215                         revoked_commitments.insert(commitment_seed, Arc::new(Mutex::new(INITIAL_REVOKED_COMMITMENT_NUMBER)));
 216                 }
 217                 let cell = revoked_commitments.get(&commitment_seed).unwrap();
 218                 Arc::clone(cell)
 219         }
 220 }
 221
 222 #[inline]
 223 fn check_api_err(api_err: APIError) {
 224         match api_err {
 225                 APIError::APIMisuseError { .. } => panic!("We can't misuse the API"),
 226                 APIError::FeeRateTooHigh { .. } => panic!("We can't send too much fee?"),
 227                 APIError::RouteError { .. } => panic!("Our routes should work"),
 228                 APIError::ChannelUnavailable { err } => {
 229                         // Test the error against a list of errors we can hit, and reject
 230                         // all others. If you hit this panic, the list of acceptable errors
 231                         // is probably just stale and you should add new messages here.
 232                         match err.as_str() {
 233                                 "Peer for first hop currently disconnected/pending monitor update!" => {},
 234                                 _ if err.starts_with("Cannot push more than their max accepted HTLCs ") => {},
 235                                 _ if err.starts_with("Cannot send value that would put us over the max HTLC value in flight our peer will accept ") => {},
 236                                 _ if err.starts_with("Cannot send value that would put our balance under counterparty-announced channel reserve value") => {},
 237                                 _ if err.starts_with("Cannot send value that would overdraw remaining funds.") => {},
 238                                 _ if err.starts_with("Cannot send value that would not leave enough to pay for fees.") => {},
 239                                 _ => panic!("{}", err),
 240                         }
 241                 },
 242                 APIError::MonitorUpdateFailed => {
 243                         // We can (obviously) temp-fail a monitor update
 244                 },
 245         }
 246 }
 247 #[inline]
 248 fn check_payment_err(send_err: PaymentSendFailure) {
 249         match send_err {
 250                 PaymentSendFailure::ParameterError(api_err) => check_api_err(api_err),
 251                 PaymentSendFailure::PathParameterError(per_path_results) => {
 252                         for res in per_path_results { if let Err(api_err) = res { check_api_err(api_err); } }
 253                 },
 254                 PaymentSendFailure::AllFailedRetrySafe(per_path_results) => {
 255                         for api_err in per_path_results { check_api_err(api_err); }
 256                 },
 257                 PaymentSendFailure::PartialFailure(per_path_results) => {
 258                         for res in per_path_results { if let Err(api_err) = res { check_api_err(api_err); } }
 259                 },
 260         }
 261 }
 262
 263 type ChanMan = ChannelManager<EnforcingSigner, Arc<TestChainMonitor>, Arc<TestBroadcaster>, Arc<KeyProvider>, Arc<FuzzEstimator>, Arc<dyn Logger>>;
 264
 265 #[inline]
 266 fn get_payment_secret_hash(dest: &ChanMan, payment_id: &mut u8) -> Option<(PaymentSecret, PaymentHash)> {
 267         let mut payment_hash;
 268         for _ in 0..256 {
 269                 payment_hash = PaymentHash(Sha256::hash(&[*payment_id; 1]).into_inner());
 270                 if let Ok(payment_secret) = dest.create_inbound_payment_for_hash(payment_hash, None, 7200, 0) {
 271                         return Some((payment_secret, payment_hash));
 272                 }
 273                 *payment_id = payment_id.wrapping_add(1);
 274         }
 275         None
 276 }
 277
 278 #[inline]
 279 fn send_payment(source: &ChanMan, dest: &ChanMan, dest_chan_id: u64, amt: u64, payment_id: &mut u8) -> bool {
 280         let (payment_secret, payment_hash) =
 281                 if let Some((secret, hash)) = get_payment_secret_hash(dest, payment_id) { (secret, hash) } else { return true; };
 282         if let Err(err) = source.send_payment(&Route {
 283                 paths: vec![vec![RouteHop {
 284                         pubkey: dest.get_our_node_id(),
 285                         node_features: NodeFeatures::known(),
 286                         short_channel_id: dest_chan_id,
 287                         channel_features: ChannelFeatures::known(),
 288                         fee_msat: amt,
 289                         cltv_expiry_delta: 200,
 290                 }]],
 291         }, payment_hash, &Some(payment_secret)) {
 292                 check_payment_err(err);
 293                 false
 294         } else { true }
 295 }
 296 #[inline]
 297 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 {
 298         let (payment_secret, payment_hash) =
 299                 if let Some((secret, hash)) = get_payment_secret_hash(dest, payment_id) { (secret, hash) } else { return true; };
 300         if let Err(err) = source.send_payment(&Route {
 301                 paths: vec![vec![RouteHop {
 302                         pubkey: middle.get_our_node_id(),
 303                         node_features: NodeFeatures::known(),
 304                         short_channel_id: middle_chan_id,
 305                         channel_features: ChannelFeatures::known(),
 306                         fee_msat: 50000,
 307                         cltv_expiry_delta: 100,
 308                 },RouteHop {
 309                         pubkey: dest.get_our_node_id(),
 310                         node_features: NodeFeatures::known(),
 311                         short_channel_id: dest_chan_id,
 312                         channel_features: ChannelFeatures::known(),
 313                         fee_msat: amt,
 314                         cltv_expiry_delta: 200,
 315                 }]],
 316         }, payment_hash, &Some(payment_secret)) {
 317                 check_payment_err(err);
 318                 false
 319         } else { true }
 320 }
 321
 322 #[inline]
 323 pub fn do_test<Out: test_logger::Output>(data: &[u8], out: Out) {
 324         let fee_est = Arc::new(FuzzEstimator{});
 325         let broadcast = Arc::new(TestBroadcaster{});
 326
 327         macro_rules! make_node {
 328                 ($node_id: expr) => { {
 329                         let logger: Arc<dyn Logger> = Arc::new(test_logger::TestLogger::new($node_id.to_string(), out.clone()));
 330                         let monitor = Arc::new(TestChainMonitor::new(broadcast.clone(), logger.clone(), fee_est.clone(), Arc::new(TestPersister{})));
 331
 332                         let keys_manager = Arc::new(KeyProvider { node_id: $node_id, rand_bytes_id: atomic::AtomicU8::new(0), revoked_commitments: Mutex::new(HashMap::new()) });
 333                         let mut config = UserConfig::default();
 334                         config.channel_options.fee_proportional_millionths = 0;
 335                         config.channel_options.announced_channel = true;
 336                         config.peer_channel_config_limits.min_dust_limit_satoshis = 0;
 337                         let network = Network::Bitcoin;
 338                         let params = ChainParameters {
 339                                 network,
 340                                 best_block: BestBlock::from_genesis(network),
 341                         };
 342                         (ChannelManager::new(fee_est.clone(), monitor.clone(), broadcast.clone(), Arc::clone(&logger), keys_manager.clone(), config, params),
 343                         monitor, keys_manager)
 344                 } }
 345         }
 346
 347         macro_rules! reload_node {
 348                 ($ser: expr, $node_id: expr, $old_monitors: expr, $keys_manager: expr) => { {
 349                     let keys_manager = Arc::clone(& $keys_manager);
 350                         let logger: Arc<dyn Logger> = Arc::new(test_logger::TestLogger::new($node_id.to_string(), out.clone()));
 351                         let chain_monitor = Arc::new(TestChainMonitor::new(broadcast.clone(), logger.clone(), fee_est.clone(), Arc::new(TestPersister{})));
 352
 353                         let mut config = UserConfig::default();
 354                         config.channel_options.fee_proportional_millionths = 0;
 355                         config.channel_options.announced_channel = true;
 356                         config.peer_channel_config_limits.min_dust_limit_satoshis = 0;
 357
 358                         let mut monitors = HashMap::new();
 359                         let mut old_monitors = $old_monitors.latest_monitors.lock().unwrap();
 360                         for (outpoint, (update_id, monitor_ser)) in old_monitors.drain() {
 361                                 monitors.insert(outpoint, <(BlockHash, ChannelMonitor<EnforcingSigner>)>::read(&mut Cursor::new(&monitor_ser), &OnlyReadsKeysInterface {}).expect("Failed to read monitor").1);
 362                                 chain_monitor.latest_monitors.lock().unwrap().insert(outpoint, (update_id, monitor_ser));
 363                         }
 364                         let mut monitor_refs = HashMap::new();
 365                         for (outpoint, monitor) in monitors.iter_mut() {
 366                                 monitor_refs.insert(*outpoint, monitor);
 367                         }
 368
 369                         let read_args = ChannelManagerReadArgs {
 370                                 keys_manager,
 371                                 fee_estimator: fee_est.clone(),
 372                                 chain_monitor: chain_monitor.clone(),
 373                                 tx_broadcaster: broadcast.clone(),
 374                                 logger,
 375                                 default_config: config,
 376                                 channel_monitors: monitor_refs,
 377                         };
 378
 379                         (<(BlockHash, ChanMan)>::read(&mut Cursor::new(&$ser.0), read_args).expect("Failed to read manager").1, chain_monitor)
 380                 } }
 381         }
 382
 383         let mut channel_txn = Vec::new();
 384         macro_rules! make_channel {
 385                 ($source: expr, $dest: expr, $chan_id: expr) => { {
 386                         $source.create_channel($dest.get_our_node_id(), 100_000, 42, 0, None).unwrap();
 387                         let open_channel = {
 388                                 let events = $source.get_and_clear_pending_msg_events();
 389                                 assert_eq!(events.len(), 1);
 390                                 if let events::MessageSendEvent::SendOpenChannel { ref msg, .. } = events[0] {
 391                                         msg.clone()
 392                                 } else { panic!("Wrong event type"); }
 393                         };
 394
 395                         $dest.handle_open_channel(&$source.get_our_node_id(), InitFeatures::known(), &open_channel);
 396                         let accept_channel = {
 397                                 let events = $dest.get_and_clear_pending_msg_events();
 398                                 assert_eq!(events.len(), 1);
 399                                 if let events::MessageSendEvent::SendAcceptChannel { ref msg, .. } = events[0] {
 400                                         msg.clone()
 401                                 } else { panic!("Wrong event type"); }
 402                         };
 403
 404                         $source.handle_accept_channel(&$dest.get_our_node_id(), InitFeatures::known(), &accept_channel);
 405                         let funding_output;
 406                         {
 407                                 let events = $source.get_and_clear_pending_events();
 408                                 assert_eq!(events.len(), 1);
 409                                 if let events::Event::FundingGenerationReady { ref temporary_channel_id, ref channel_value_satoshis, ref output_script, .. } = events[0] {
 410                                         let tx = Transaction { version: $chan_id, lock_time: 0, input: Vec::new(), output: vec![TxOut {
 411                                                 value: *channel_value_satoshis, script_pubkey: output_script.clone(),
 412                                         }]};
 413                                         funding_output = OutPoint { txid: tx.txid(), index: 0 };
 414                                         $source.funding_transaction_generated(&temporary_channel_id, tx.clone()).unwrap();
 415                                         channel_txn.push(tx);
 416                                 } else { panic!("Wrong event type"); }
 417                         }
 418
 419                         let funding_created = {
 420                                 let events = $source.get_and_clear_pending_msg_events();
 421                                 assert_eq!(events.len(), 1);
 422                                 if let events::MessageSendEvent::SendFundingCreated { ref msg, .. } = events[0] {
 423                                         msg.clone()
 424                                 } else { panic!("Wrong event type"); }
 425                         };
 426                         $dest.handle_funding_created(&$source.get_our_node_id(), &funding_created);
 427
 428                         let funding_signed = {
 429                                 let events = $dest.get_and_clear_pending_msg_events();
 430                                 assert_eq!(events.len(), 1);
 431                                 if let events::MessageSendEvent::SendFundingSigned { ref msg, .. } = events[0] {
 432                                         msg.clone()
 433                                 } else { panic!("Wrong event type"); }
 434                         };
 435                         $source.handle_funding_signed(&$dest.get_our_node_id(), &funding_signed);
 436
 437                         funding_output
 438                 } }
 439         }
 440
 441         macro_rules! confirm_txn {
 442                 ($node: expr) => { {
 443                         let chain_hash = genesis_block(Network::Bitcoin).block_hash();
 444                         let mut header = BlockHeader { version: 0x20000000, prev_blockhash: chain_hash, merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
 445                         let txdata: Vec<_> = channel_txn.iter().enumerate().map(|(i, tx)| (i + 1, tx)).collect();
 446                         $node.transactions_confirmed(&header, &txdata, 1);
 447                         for _ in 2..100 {
 448                                 header = BlockHeader { version: 0x20000000, prev_blockhash: header.block_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
 449                         }
 450                         $node.best_block_updated(&header, 99);
 451                 } }
 452         }
 453
 454         macro_rules! lock_fundings {
 455                 ($nodes: expr) => { {
 456                         let mut node_events = Vec::new();
 457                         for node in $nodes.iter() {
 458                                 node_events.push(node.get_and_clear_pending_msg_events());
 459                         }
 460                         for (idx, node_event) in node_events.iter().enumerate() {
 461                                 for event in node_event {
 462                                         if let events::MessageSendEvent::SendFundingLocked { ref node_id, ref msg } = event {
 463                                                 for node in $nodes.iter() {
 464                                                         if node.get_our_node_id() == *node_id {
 465                                                                 node.handle_funding_locked(&$nodes[idx].get_our_node_id(), msg);
 466                                                         }
 467                                                 }
 468                                         } else { panic!("Wrong event type"); }
 469                                 }
 470                         }
 471
 472                         for node in $nodes.iter() {
 473                                 let events = node.get_and_clear_pending_msg_events();
 474                                 for event in events {
 475                                         if let events::MessageSendEvent::SendAnnouncementSignatures { .. } = event {
 476                                         } else { panic!("Wrong event type"); }
 477                                 }
 478                         }
 479                 } }
 480         }
 481
 482         // 3 nodes is enough to hit all the possible cases, notably unknown-source-unknown-dest
 483         // forwarding.
 484         let (node_a, mut monitor_a, keys_manager_a) = make_node!(0);
 485         let (node_b, mut monitor_b, keys_manager_b) = make_node!(1);
 486         let (node_c, mut monitor_c, keys_manager_c) = make_node!(2);
 487
 488         let mut nodes = [node_a, node_b, node_c];
 489
 490         let chan_1_funding = make_channel!(nodes[0], nodes[1], 0);
 491         let chan_2_funding = make_channel!(nodes[1], nodes[2], 1);
 492
 493         for node in nodes.iter() {
 494                 confirm_txn!(node);
 495         }
 496
 497         lock_fundings!(nodes);
 498
 499         let chan_a = nodes[0].list_usable_channels()[0].short_channel_id.unwrap();
 500         let chan_b = nodes[2].list_usable_channels()[0].short_channel_id.unwrap();
 501
 502         let mut payment_id: u8 = 0;
 503
 504         let mut chan_a_disconnected = false;
 505         let mut chan_b_disconnected = false;
 506         let mut ba_events = Vec::new();
 507         let mut bc_events = Vec::new();
 508
 509         let mut node_a_ser = VecWriter(Vec::new());
 510         nodes[0].write(&mut node_a_ser).unwrap();
 511         let mut node_b_ser = VecWriter(Vec::new());
 512         nodes[1].write(&mut node_b_ser).unwrap();
 513         let mut node_c_ser = VecWriter(Vec::new());
 514         nodes[2].write(&mut node_c_ser).unwrap();
 515
 516         macro_rules! test_return {
 517                 () => { {
 518                         assert_eq!(nodes[0].list_channels().len(), 1);
 519                         assert_eq!(nodes[1].list_channels().len(), 2);
 520                         assert_eq!(nodes[2].list_channels().len(), 1);
 521                         return;
 522                 } }
 523         }
 524
 525         let mut read_pos = 0;
 526         macro_rules! get_slice {
 527                 ($len: expr) => {
 528                         {
 529                                 let slice_len = $len as usize;
 530                                 if data.len() < read_pos + slice_len {
 531                                         test_return!();
 532                                 }
 533                                 read_pos += slice_len;
 534                                 &data[read_pos - slice_len..read_pos]
 535                         }
 536                 }
 537         }
 538
 539         loop {
 540                 macro_rules! process_msg_events {
 541                         ($node: expr, $corrupt_forward: expr) => { {
 542                                 let events = if $node == 1 {
 543                                         let mut new_events = Vec::new();
 544                                         mem::swap(&mut new_events, &mut ba_events);
 545                                         new_events.extend_from_slice(&bc_events[..]);
 546                                         bc_events.clear();
 547                                         new_events
 548                                 } else { Vec::new() };
 549                                 let mut had_events = false;
 550                                 for event in events.iter().chain(nodes[$node].get_and_clear_pending_msg_events().iter()) {
 551                                         had_events = true;
 552                                         match event {
 553                                                 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 } } => {
 554                                                         for dest in nodes.iter() {
 555                                                                 if dest.get_our_node_id() == *node_id {
 556                                                                         assert!(update_fee.is_none());
 557                                                                         for update_add in update_add_htlcs {
 558                                                                                 if !$corrupt_forward {
 559                                                                                         dest.handle_update_add_htlc(&nodes[$node].get_our_node_id(), &update_add);
 560                                                                                 } else {
 561                                                                                         // Corrupt the update_add_htlc message so that its HMAC
 562                                                                                         // check will fail and we generate a
 563                                                                                         // update_fail_malformed_htlc instead of an
 564                                                                                         // update_fail_htlc as we do when we reject a payment.
 565                                                                                         let mut msg_ser = update_add.encode();
 566                                                                                         msg_ser[1000] ^= 0xff;
 567                                                                                         let new_msg = UpdateAddHTLC::read(&mut Cursor::new(&msg_ser)).unwrap();
 568                                                                                         dest.handle_update_add_htlc(&nodes[$node].get_our_node_id(), &new_msg);
 569                                                                                 }
 570                                                                         }
 571                                                                         for update_fulfill in update_fulfill_htlcs {
 572                                                                                 dest.handle_update_fulfill_htlc(&nodes[$node].get_our_node_id(), &update_fulfill);
 573                                                                         }
 574                                                                         for update_fail in update_fail_htlcs {
 575                                                                                 dest.handle_update_fail_htlc(&nodes[$node].get_our_node_id(), &update_fail);
 576                                                                         }
 577                                                                         for update_fail_malformed in update_fail_malformed_htlcs {
 578                                                                                 dest.handle_update_fail_malformed_htlc(&nodes[$node].get_our_node_id(), &update_fail_malformed);
 579                                                                         }
 580                                                                         dest.handle_commitment_signed(&nodes[$node].get_our_node_id(), &commitment_signed);
 581                                                                 }
 582                                                         }
 583                                                 },
 584                                                 events::MessageSendEvent::SendRevokeAndACK { ref node_id, ref msg } => {
 585                                                         for dest in nodes.iter() {
 586                                                                 if dest.get_our_node_id() == *node_id {
 587                                                                         dest.handle_revoke_and_ack(&nodes[$node].get_our_node_id(), msg);
 588                                                                 }
 589                                                         }
 590                                                 },
 591                                                 events::MessageSendEvent::SendChannelReestablish { ref node_id, ref msg } => {
 592                                                         for dest in nodes.iter() {
 593                                                                 if dest.get_our_node_id() == *node_id {
 594                                                                         dest.handle_channel_reestablish(&nodes[$node].get_our_node_id(), msg);
 595                                                                 }
 596                                                         }
 597                                                 },
 598                                                 events::MessageSendEvent::SendFundingLocked { .. } => {
 599                                                         // Can be generated as a reestablish response
 600                                                 },
 601                                                 events::MessageSendEvent::PaymentFailureNetworkUpdate { .. } => {
 602                                                         // Can be generated due to a payment forward being rejected due to a
 603                                                         // channel having previously failed a monitor update
 604                                                 },
 605                                                 _ => panic!("Unhandled message event"),
 606                                         }
 607                                 }
 608                                 had_events
 609                         } }
 610                 }
 611
 612                 macro_rules! drain_msg_events_on_disconnect {
 613                         ($counterparty_id: expr) => { {
 614                                 if $counterparty_id == 0 {
 615                                         for event in nodes[0].get_and_clear_pending_msg_events() {
 616                                                 match event {
 617                                                         events::MessageSendEvent::UpdateHTLCs { .. } => {},
 618                                                         events::MessageSendEvent::SendRevokeAndACK { .. } => {},
 619                                                         events::MessageSendEvent::SendChannelReestablish { .. } => {},
 620                                                         events::MessageSendEvent::SendFundingLocked { .. } => {},
 621                                                         events::MessageSendEvent::PaymentFailureNetworkUpdate { .. } => {},
 622                                                         events::MessageSendEvent::HandleError { action: ErrorAction::IgnoreError, .. } => {},
 623                                                         _ => panic!("Unhandled message event"),
 624                                                 }
 625                                         }
 626                                         ba_events.clear();
 627                                 } else {
 628                                         for event in nodes[2].get_and_clear_pending_msg_events() {
 629                                                 match event {
 630                                                         events::MessageSendEvent::UpdateHTLCs { .. } => {},
 631                                                         events::MessageSendEvent::SendRevokeAndACK { .. } => {},
 632                                                         events::MessageSendEvent::SendChannelReestablish { .. } => {},
 633                                                         events::MessageSendEvent::SendFundingLocked { .. } => {},
 634                                                         events::MessageSendEvent::PaymentFailureNetworkUpdate { .. } => {},
 635                                                         events::MessageSendEvent::HandleError { action: ErrorAction::IgnoreError, .. } => {},
 636                                                         _ => panic!("Unhandled message event"),
 637                                                 }
 638                                         }
 639                                         bc_events.clear();
 640                                 }
 641                                 let mut events = nodes[1].get_and_clear_pending_msg_events();
 642                                 let drop_node_id = if $counterparty_id == 0 { nodes[0].get_our_node_id() } else { nodes[2].get_our_node_id() };
 643                                 let msg_sink = if $counterparty_id == 0 { &mut bc_events } else { &mut ba_events };
 644                                 for event in events.drain(..) {
 645                                         let push = match event {
 646                                                 events::MessageSendEvent::UpdateHTLCs { ref node_id, .. } => {
 647                                                         if *node_id != drop_node_id { true } else { false }
 648                                                 },
 649                                                 events::MessageSendEvent::SendRevokeAndACK { ref node_id, .. } => {
 650                                                         if *node_id != drop_node_id { true } else { false }
 651                                                 },
 652                                                 events::MessageSendEvent::SendChannelReestablish { ref node_id, .. } => {
 653                                                         if *node_id != drop_node_id { true } else { false }
 654                                                 },
 655                                                 events::MessageSendEvent::SendFundingLocked { .. } => false,
 656                                                 events::MessageSendEvent::PaymentFailureNetworkUpdate { .. } => false,
 657                                                 events::MessageSendEvent::HandleError { action: ErrorAction::IgnoreError, .. } => false,
 658                                                 _ => panic!("Unhandled message event"),
 659                                         };
 660                                         if push { msg_sink.push(event); }
 661                                 }
 662                         } }
 663                 }
 664
 665                 macro_rules! process_events {
 666                         ($node: expr, $fail: expr) => { {
 667                                 // In case we get 256 payments we may have a hash collision, resulting in the
 668                                 // second claim/fail call not finding the duplicate-hash HTLC, so we have to
 669                                 // deduplicate the calls here.
 670                                 let mut claim_set = HashSet::new();
 671                                 let mut events = nodes[$node].get_and_clear_pending_events();
 672                                 // Sort events so that PendingHTLCsForwardable get processed last. This avoids a
 673                                 // case where we first process a PendingHTLCsForwardable, then claim/fail on a
 674                                 // PaymentReceived, claiming/failing two HTLCs, but leaving a just-generated
 675                                 // PaymentReceived event for the second HTLC in our pending_events (and breaking
 676                                 // our claim_set deduplication).
 677                                 events.sort_by(|a, b| {
 678                                         if let events::Event::PaymentReceived { .. } = a {
 679                                                 if let events::Event::PendingHTLCsForwardable { .. } = b {
 680                                                         Ordering::Less
 681                                                 } else { Ordering::Equal }
 682                                         } else if let events::Event::PendingHTLCsForwardable { .. } = a {
 683                                                 if let events::Event::PaymentReceived { .. } = b {
 684                                                         Ordering::Greater
 685                                                 } else { Ordering::Equal }
 686                                         } else { Ordering::Equal }
 687                                 });
 688                                 let had_events = !events.is_empty();
 689                                 for event in events.drain(..) {
 690                                         match event {
 691                                                 events::Event::PaymentReceived { payment_hash, .. } => {
 692                                                         if claim_set.insert(payment_hash.0) {
 693                                                                 if $fail {
 694                                                                         assert!(nodes[$node].fail_htlc_backwards(&payment_hash));
 695                                                                 } else {
 696                                                                         assert!(nodes[$node].claim_funds(PaymentPreimage(payment_hash.0)));
 697                                                                 }
 698                                                         }
 699                                                 },
 700                                                 events::Event::PaymentSent { .. } => {},
 701                                                 events::Event::PaymentFailed { .. } => {},
 702                                                 events::Event::PendingHTLCsForwardable { .. } => {
 703                                                         nodes[$node].process_pending_htlc_forwards();
 704                                                 },
 705                                                 _ => panic!("Unhandled event"),
 706                                         }
 707                                 }
 708                                 had_events
 709                         } }
 710                 }
 711
 712                 match get_slice!(1)[0] {
 713                         // In general, we keep related message groups close together in binary form, allowing
 714                         // bit-twiddling mutations to have similar effects. This is probably overkill, but no
 715                         // harm in doing so.
 716
 717                         0x00 => *monitor_a.update_ret.lock().unwrap() = Err(ChannelMonitorUpdateErr::TemporaryFailure),
 718                         0x01 => *monitor_b.update_ret.lock().unwrap() = Err(ChannelMonitorUpdateErr::TemporaryFailure),
 719                         0x02 => *monitor_c.update_ret.lock().unwrap() = Err(ChannelMonitorUpdateErr::TemporaryFailure),
 720                         0x04 => *monitor_a.update_ret.lock().unwrap() = Ok(()),
 721                         0x05 => *monitor_b.update_ret.lock().unwrap() = Ok(()),
 722                         0x06 => *monitor_c.update_ret.lock().unwrap() = Ok(()),
 723
 724                         0x08 => {
 725                                 if let Some((id, _)) = monitor_a.latest_monitors.lock().unwrap().get(&chan_1_funding) {
 726                                         nodes[0].channel_monitor_updated(&chan_1_funding, *id);
 727                                 }
 728                         },
 729                         0x09 => {
 730                                 if let Some((id, _)) = monitor_b.latest_monitors.lock().unwrap().get(&chan_1_funding) {
 731                                         nodes[1].channel_monitor_updated(&chan_1_funding, *id);
 732                                 }
 733                         },
 734                         0x0a => {
 735                                 if let Some((id, _)) = monitor_b.latest_monitors.lock().unwrap().get(&chan_2_funding) {
 736                                         nodes[1].channel_monitor_updated(&chan_2_funding, *id);
 737                                 }
 738                         },
 739                         0x0b => {
 740                                 if let Some((id, _)) = monitor_c.latest_monitors.lock().unwrap().get(&chan_2_funding) {
 741                                         nodes[2].channel_monitor_updated(&chan_2_funding, *id);
 742                                 }
 743                         },
 744
 745                         0x0c => {
 746                                 if !chan_a_disconnected {
 747                                         nodes[0].peer_disconnected(&nodes[1].get_our_node_id(), false);
 748                                         nodes[1].peer_disconnected(&nodes[0].get_our_node_id(), false);
 749                                         chan_a_disconnected = true;
 750                                         drain_msg_events_on_disconnect!(0);
 751                                 }
 752                         },
 753                         0x0d => {
 754                                 if !chan_b_disconnected {
 755                                         nodes[1].peer_disconnected(&nodes[2].get_our_node_id(), false);
 756                                         nodes[2].peer_disconnected(&nodes[1].get_our_node_id(), false);
 757                                         chan_b_disconnected = true;
 758                                         drain_msg_events_on_disconnect!(2);
 759                                 }
 760                         },
 761                         0x0e => {
 762                                 if chan_a_disconnected {
 763                                         nodes[0].peer_connected(&nodes[1].get_our_node_id(), &Init { features: InitFeatures::known() });
 764                                         nodes[1].peer_connected(&nodes[0].get_our_node_id(), &Init { features: InitFeatures::known() });
 765                                         chan_a_disconnected = false;
 766                                 }
 767                         },
 768                         0x0f => {
 769                                 if chan_b_disconnected {
 770                                         nodes[1].peer_connected(&nodes[2].get_our_node_id(), &Init { features: InitFeatures::known() });
 771                                         nodes[2].peer_connected(&nodes[1].get_our_node_id(), &Init { features: InitFeatures::known() });
 772                                         chan_b_disconnected = false;
 773                                 }
 774                         },
 775
 776                         0x10 => { process_msg_events!(0, true); },
 777                         0x11 => { process_msg_events!(0, false); },
 778                         0x12 => { process_events!(0, true); },
 779                         0x13 => { process_events!(0, false); },
 780                         0x14 => { process_msg_events!(1, true); },
 781                         0x15 => { process_msg_events!(1, false); },
 782                         0x16 => { process_events!(1, true); },
 783                         0x17 => { process_events!(1, false); },
 784                         0x18 => { process_msg_events!(2, true); },
 785                         0x19 => { process_msg_events!(2, false); },
 786                         0x1a => { process_events!(2, true); },
 787                         0x1b => { process_events!(2, false); },
 788
 789                         0x1c => {
 790                                 if !chan_a_disconnected {
 791                                         nodes[1].peer_disconnected(&nodes[0].get_our_node_id(), false);
 792                                         chan_a_disconnected = true;
 793                                         drain_msg_events_on_disconnect!(0);
 794                                 }
 795                                 let (new_node_a, new_monitor_a) = reload_node!(node_a_ser, 0, monitor_a, keys_manager_a);
 796                                 nodes[0] = new_node_a;
 797                                 monitor_a = new_monitor_a;
 798                         },
 799                         0x1d => {
 800                                 if !chan_a_disconnected {
 801                                         nodes[0].peer_disconnected(&nodes[1].get_our_node_id(), false);
 802                                         chan_a_disconnected = true;
 803                                         nodes[0].get_and_clear_pending_msg_events();
 804                                         ba_events.clear();
 805                                 }
 806                                 if !chan_b_disconnected {
 807                                         nodes[2].peer_disconnected(&nodes[1].get_our_node_id(), false);
 808                                         chan_b_disconnected = true;
 809                                         nodes[2].get_and_clear_pending_msg_events();
 810                                         bc_events.clear();
 811                                 }
 812                                 let (new_node_b, new_monitor_b) = reload_node!(node_b_ser, 1, monitor_b, keys_manager_b);
 813                                 nodes[1] = new_node_b;
 814                                 monitor_b = new_monitor_b;
 815                         },
 816                         0x1e => {
 817                                 if !chan_b_disconnected {
 818                                         nodes[1].peer_disconnected(&nodes[2].get_our_node_id(), false);
 819                                         chan_b_disconnected = true;
 820                                         drain_msg_events_on_disconnect!(2);
 821                                 }
 822                                 let (new_node_c, new_monitor_c) = reload_node!(node_c_ser, 2, monitor_c, keys_manager_c);
 823                                 nodes[2] = new_node_c;
 824                                 monitor_c = new_monitor_c;
 825                         },
 826
 827                         // 1/10th the channel size:
 828                         0x20 => { send_payment(&nodes[0], &nodes[1], chan_a, 10_000_000, &mut payment_id); },
 829                         0x21 => { send_payment(&nodes[1], &nodes[0], chan_a, 10_000_000, &mut payment_id); },
 830                         0x22 => { send_payment(&nodes[1], &nodes[2], chan_b, 10_000_000, &mut payment_id); },
 831                         0x23 => { send_payment(&nodes[2], &nodes[1], chan_b, 10_000_000, &mut payment_id); },
 832                         0x24 => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 10_000_000, &mut payment_id); },
 833                         0x25 => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 10_000_000, &mut payment_id); },
 834
 835                         0x28 => { send_payment(&nodes[0], &nodes[1], chan_a, 1_000_000, &mut payment_id); },
 836                         0x29 => { send_payment(&nodes[1], &nodes[0], chan_a, 1_000_000, &mut payment_id); },
 837                         0x2a => { send_payment(&nodes[1], &nodes[2], chan_b, 1_000_000, &mut payment_id); },
 838                         0x2b => { send_payment(&nodes[2], &nodes[1], chan_b, 1_000_000, &mut payment_id); },
 839                         0x2c => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 1_000_000, &mut payment_id); },
 840                         0x2d => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 1_000_000, &mut payment_id); },
 841
 842                         0x30 => { send_payment(&nodes[0], &nodes[1], chan_a, 100_000, &mut payment_id); },
 843                         0x31 => { send_payment(&nodes[1], &nodes[0], chan_a, 100_000, &mut payment_id); },
 844                         0x32 => { send_payment(&nodes[1], &nodes[2], chan_b, 100_000, &mut payment_id); },
 845                         0x33 => { send_payment(&nodes[2], &nodes[1], chan_b, 100_000, &mut payment_id); },
 846                         0x34 => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 100_000, &mut payment_id); },
 847                         0x35 => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 100_000, &mut payment_id); },
 848
 849                         0x38 => { send_payment(&nodes[0], &nodes[1], chan_a, 10_000, &mut payment_id); },
 850                         0x39 => { send_payment(&nodes[1], &nodes[0], chan_a, 10_000, &mut payment_id); },
 851                         0x3a => { send_payment(&nodes[1], &nodes[2], chan_b, 10_000, &mut payment_id); },
 852                         0x3b => { send_payment(&nodes[2], &nodes[1], chan_b, 10_000, &mut payment_id); },
 853                         0x3c => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 10_000, &mut payment_id); },
 854                         0x3d => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 10_000, &mut payment_id); },
 855
 856                         0x40 => { send_payment(&nodes[0], &nodes[1], chan_a, 1_000, &mut payment_id); },
 857                         0x41 => { send_payment(&nodes[1], &nodes[0], chan_a, 1_000, &mut payment_id); },
 858                         0x42 => { send_payment(&nodes[1], &nodes[2], chan_b, 1_000, &mut payment_id); },
 859                         0x43 => { send_payment(&nodes[2], &nodes[1], chan_b, 1_000, &mut payment_id); },
 860                         0x44 => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 1_000, &mut payment_id); },
 861                         0x45 => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 1_000, &mut payment_id); },
 862
 863                         0x48 => { send_payment(&nodes[0], &nodes[1], chan_a, 100, &mut payment_id); },
 864                         0x49 => { send_payment(&nodes[1], &nodes[0], chan_a, 100, &mut payment_id); },
 865                         0x4a => { send_payment(&nodes[1], &nodes[2], chan_b, 100, &mut payment_id); },
 866                         0x4b => { send_payment(&nodes[2], &nodes[1], chan_b, 100, &mut payment_id); },
 867                         0x4c => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 100, &mut payment_id); },
 868                         0x4d => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 100, &mut payment_id); },
 869
 870                         0x50 => { send_payment(&nodes[0], &nodes[1], chan_a, 10, &mut payment_id); },
 871                         0x51 => { send_payment(&nodes[1], &nodes[0], chan_a, 10, &mut payment_id); },
 872                         0x52 => { send_payment(&nodes[1], &nodes[2], chan_b, 10, &mut payment_id); },
 873                         0x53 => { send_payment(&nodes[2], &nodes[1], chan_b, 10, &mut payment_id); },
 874                         0x54 => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 10, &mut payment_id); },
 875                         0x55 => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 10, &mut payment_id); },
 876
 877                         0x58 => { send_payment(&nodes[0], &nodes[1], chan_a, 1, &mut payment_id); },
 878                         0x59 => { send_payment(&nodes[1], &nodes[0], chan_a, 1, &mut payment_id); },
 879                         0x5a => { send_payment(&nodes[1], &nodes[2], chan_b, 1, &mut payment_id); },
 880                         0x5b => { send_payment(&nodes[2], &nodes[1], chan_b, 1, &mut payment_id); },
 881                         0x5c => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 1, &mut payment_id); },
 882                         0x5d => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 1, &mut payment_id); },
 883
 884                         0xff => {
 885                                 // Test that no channel is in a stuck state where neither party can send funds even
 886                                 // after we resolve all pending events.
 887                                 // First make sure there are no pending monitor updates, resetting the error state
 888                                 // and calling channel_monitor_updated for each monitor.
 889                                 *monitor_a.update_ret.lock().unwrap() = Ok(());
 890                                 *monitor_b.update_ret.lock().unwrap() = Ok(());
 891                                 *monitor_c.update_ret.lock().unwrap() = Ok(());
 892
 893                                 if let Some((id, _)) = monitor_a.latest_monitors.lock().unwrap().get(&chan_1_funding) {
 894                                         nodes[0].channel_monitor_updated(&chan_1_funding, *id);
 895                                 }
 896                                 if let Some((id, _)) = monitor_b.latest_monitors.lock().unwrap().get(&chan_1_funding) {
 897                                         nodes[1].channel_monitor_updated(&chan_1_funding, *id);
 898                                 }
 899                                 if let Some((id, _)) = monitor_b.latest_monitors.lock().unwrap().get(&chan_2_funding) {
 900                                         nodes[1].channel_monitor_updated(&chan_2_funding, *id);
 901                                 }
 902                                 if let Some((id, _)) = monitor_c.latest_monitors.lock().unwrap().get(&chan_2_funding) {
 903                                         nodes[2].channel_monitor_updated(&chan_2_funding, *id);
 904                                 }
 905
 906                                 // Next, make sure peers are all connected to each other
 907                                 if chan_a_disconnected {
 908                                         nodes[0].peer_connected(&nodes[1].get_our_node_id(), &Init { features: InitFeatures::known() });
 909                                         nodes[1].peer_connected(&nodes[0].get_our_node_id(), &Init { features: InitFeatures::known() });
 910                                         chan_a_disconnected = false;
 911                                 }
 912                                 if chan_b_disconnected {
 913                                         nodes[1].peer_connected(&nodes[2].get_our_node_id(), &Init { features: InitFeatures::known() });
 914                                         nodes[2].peer_connected(&nodes[1].get_our_node_id(), &Init { features: InitFeatures::known() });
 915                                         chan_b_disconnected = false;
 916                                 }
 917
 918                                 for i in 0..std::usize::MAX {
 919                                         if i == 100 { panic!("It may take may iterations to settle the state, but it should not take forever"); }
 920                                         // Then, make sure any current forwards make their way to their destination
 921                                         if process_msg_events!(0, false) { continue; }
 922                                         if process_msg_events!(1, false) { continue; }
 923                                         if process_msg_events!(2, false) { continue; }
 924                                         // ...making sure any pending PendingHTLCsForwardable events are handled and
 925                                         // payments claimed.
 926                                         if process_events!(0, false) { continue; }
 927                                         if process_events!(1, false) { continue; }
 928                                         if process_events!(2, false) { continue; }
 929                                         break;
 930                                 }
 931
 932                                 // Finally, make sure that at least one end of each channel can make a substantial payment.
 933                                 assert!(
 934                                         send_payment(&nodes[0], &nodes[1], chan_a, 10_000_000, &mut payment_id) ||
 935                                         send_payment(&nodes[1], &nodes[0], chan_a, 10_000_000, &mut payment_id));
 936                                 assert!(
 937                                         send_payment(&nodes[1], &nodes[2], chan_b, 10_000_000, &mut payment_id) ||
 938                                         send_payment(&nodes[2], &nodes[1], chan_b, 10_000_000, &mut payment_id));
 939                         },
 940                         _ => test_return!(),
 941                 }
 942
 943                 node_a_ser.0.clear();
 944                 nodes[0].write(&mut node_a_ser).unwrap();
 945                 monitor_a.should_update_manager.store(false, atomic::Ordering::Relaxed);
 946                 node_b_ser.0.clear();
 947                 nodes[1].write(&mut node_b_ser).unwrap();
 948                 monitor_b.should_update_manager.store(false, atomic::Ordering::Relaxed);
 949                 node_c_ser.0.clear();
 950                 nodes[2].write(&mut node_c_ser).unwrap();
 951                 monitor_c.should_update_manager.store(false, atomic::Ordering::Relaxed);
 952         }
 953 }
 954
 955 pub fn chanmon_consistency_test<Out: test_logger::Output>(data: &[u8], out: Out) {
 956         do_test(data, out);
 957 }
 958
 959 #[no_mangle]
 960 pub extern "C" fn chanmon_consistency_run(data: *const u8, datalen: usize) {
 961         do_test(unsafe { std::slice::from_raw_parts(data, datalen) }, test_logger::DevNull{});
 962 }