_ 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::recovery::RecoverableSignature;
  60 use bitcoin::secp256k1::Secp256k1;
  61
  62 use std::mem;
  63 use std::cmp::Ordering;
  64 use std::collections::{HashSet, hash_map, HashMap};
  65 use std::sync::{Arc,Mutex};
  66 use std::sync::atomic;
  67 use std::io::Cursor;
  68
  69 struct FuzzEstimator {}
  70 impl FeeEstimator for FuzzEstimator {
  71         fn get_est_sat_per_1000_weight(&self, _: ConfirmationTarget) -> u32 {
  72                 253
  73         }
  74 }
  75
  76 pub struct TestBroadcaster {}
  77 impl BroadcasterInterface for TestBroadcaster {
  78         fn broadcast_transaction(&self, _tx: &Transaction) { }
  79 }
  80
  81 pub struct VecWriter(pub Vec<u8>);
  82 impl Writer for VecWriter {
  83         fn write_all(&mut self, buf: &[u8]) -> Result<(), ::std::io::Error> {
  84                 self.0.extend_from_slice(buf);
  85                 Ok(())
  86         }
  87         fn size_hint(&mut self, size: usize) {
  88                 self.0.reserve_exact(size);
  89         }
  90 }
  91
  92 struct TestChainMonitor {
  93         pub logger: Arc<dyn Logger>,
  94         pub chain_monitor: Arc<chainmonitor::ChainMonitor<EnforcingSigner, Arc<dyn chain::Filter>, Arc<TestBroadcaster>, Arc<FuzzEstimator>, Arc<dyn Logger>, Arc<TestPersister>>>,
  95         pub update_ret: Mutex<Result<(), channelmonitor::ChannelMonitorUpdateErr>>,
  96         // If we reload a node with an old copy of ChannelMonitors, the ChannelManager deserialization
  97         // logic will automatically force-close our channels for us (as we don't have an up-to-date
  98         // monitor implying we are not able to punish misbehaving counterparties). Because this test
  99         // "fails" if we ever force-close a channel, we avoid doing so, always saving the latest
 100         // fully-serialized monitor state here, as well as the corresponding update_id.
 101         pub latest_monitors: Mutex<HashMap<OutPoint, (u64, Vec<u8>)>>,
 102         pub should_update_manager: atomic::AtomicBool,
 103 }
 104 impl TestChainMonitor {
 105         pub fn new(broadcaster: Arc<TestBroadcaster>, logger: Arc<dyn Logger>, feeest: Arc<FuzzEstimator>, persister: Arc<TestPersister>) -> Self {
 106                 Self {
 107                         chain_monitor: Arc::new(chainmonitor::ChainMonitor::new(None, broadcaster, logger.clone(), feeest, persister)),
 108                         logger,
 109                         update_ret: Mutex::new(Ok(())),
 110                         latest_monitors: Mutex::new(HashMap::new()),
 111                         should_update_manager: atomic::AtomicBool::new(false),
 112                 }
 113         }
 114 }
 115 impl chain::Watch<EnforcingSigner> for TestChainMonitor {
 116         fn watch_channel(&self, funding_txo: OutPoint, monitor: channelmonitor::ChannelMonitor<EnforcingSigner>) -> Result<(), channelmonitor::ChannelMonitorUpdateErr> {
 117                 let mut ser = VecWriter(Vec::new());
 118                 monitor.write(&mut ser).unwrap();
 119                 if let Some(_) = self.latest_monitors.lock().unwrap().insert(funding_txo, (monitor.get_latest_update_id(), ser.0)) {
 120                         panic!("Already had monitor pre-watch_channel");
 121                 }
 122                 self.should_update_manager.store(true, atomic::Ordering::Relaxed);
 123                 assert!(self.chain_monitor.watch_channel(funding_txo, monitor).is_ok());
 124                 self.update_ret.lock().unwrap().clone()
 125         }
 126
 127         fn update_channel(&self, funding_txo: OutPoint, update: channelmonitor::ChannelMonitorUpdate) -> Result<(), channelmonitor::ChannelMonitorUpdateErr> {
 128                 let mut map_lock = self.latest_monitors.lock().unwrap();
 129                 let mut map_entry = match map_lock.entry(funding_txo) {
 130                         hash_map::Entry::Occupied(entry) => entry,
 131                         hash_map::Entry::Vacant(_) => panic!("Didn't have monitor on update call"),
 132                 };
 133                 let deserialized_monitor = <(BlockHash, channelmonitor::ChannelMonitor<EnforcingSigner>)>::
 134                         read(&mut Cursor::new(&map_entry.get().1), &OnlyReadsKeysInterface {}).unwrap().1;
 135                 deserialized_monitor.update_monitor(&update, &&TestBroadcaster{}, &&FuzzEstimator{}, &self.logger).unwrap();
 136                 let mut ser = VecWriter(Vec::new());
 137                 deserialized_monitor.write(&mut ser).unwrap();
 138                 map_entry.insert((update.update_id, ser.0));
 139                 self.should_update_manager.store(true, atomic::Ordering::Relaxed);
 140                 self.update_ret.lock().unwrap().clone()
 141         }
 142
 143         fn release_pending_monitor_events(&self) -> Vec<MonitorEvent> {
 144                 return self.chain_monitor.release_pending_monitor_events();
 145         }
 146 }
 147
 148 struct KeyProvider {
 149         node_id: u8,
 150         rand_bytes_id: atomic::AtomicU8,
 151         revoked_commitments: Mutex<HashMap<[u8;32], Arc<Mutex<u64>>>>,
 152 }
 153 impl KeysInterface for KeyProvider {
 154         type Signer = EnforcingSigner;
 155
 156         fn get_node_secret(&self) -> SecretKey {
 157                 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()
 158         }
 159
 160         fn get_destination_script(&self) -> Script {
 161                 let secp_ctx = Secp256k1::signing_only();
 162                 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();
 163                 let our_channel_monitor_claim_key_hash = WPubkeyHash::hash(&PublicKey::from_secret_key(&secp_ctx, &channel_monitor_claim_key).serialize());
 164                 Builder::new().push_opcode(opcodes::all::OP_PUSHBYTES_0).push_slice(&our_channel_monitor_claim_key_hash[..]).into_script()
 165         }
 166
 167         fn get_shutdown_pubkey(&self) -> PublicKey {
 168                 let secp_ctx = Secp256k1::signing_only();
 169                 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())
 170         }
 171
 172         fn get_channel_signer(&self, _inbound: bool, channel_value_satoshis: u64) -> EnforcingSigner {
 173                 let secp_ctx = Secp256k1::signing_only();
 174                 let id = self.rand_bytes_id.fetch_add(1, atomic::Ordering::Relaxed);
 175                 let keys = InMemorySigner::new(
 176                         &secp_ctx,
 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, 4, 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, 5, 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, 6, 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, 7, self.node_id]).unwrap(),
 181                         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(),
 182                         [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],
 183                         channel_value_satoshis,
 184                         [0; 32],
 185                 );
 186                 let revoked_commitment = self.make_revoked_commitment_cell(keys.commitment_seed);
 187                 EnforcingSigner::new_with_revoked(keys, revoked_commitment, false)
 188         }
 189
 190         fn get_secure_random_bytes(&self) -> [u8; 32] {
 191                 let id = self.rand_bytes_id.fetch_add(1, atomic::Ordering::Relaxed);
 192                 [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]
 193         }
 194
 195         fn read_chan_signer(&self, buffer: &[u8]) -> Result<Self::Signer, DecodeError> {
 196                 let mut reader = std::io::Cursor::new(buffer);
 197
 198                 let inner: InMemorySigner = Readable::read(&mut reader)?;
 199                 let revoked_commitment = self.make_revoked_commitment_cell(inner.commitment_seed);
 200
 201                 let last_commitment_number = Readable::read(&mut reader)?;
 202
 203                 Ok(EnforcingSigner {
 204                         inner,
 205                         last_commitment_number: Arc::new(Mutex::new(last_commitment_number)),
 206                         revoked_commitment,
 207                         disable_revocation_policy_check: false,
 208                 })
 209         }
 210
 211         fn sign_invoice(&self, _invoice_preimage: Vec<u8>) -> Result<RecoverableSignature, ()> {
 212                 unreachable!()
 213         }
 214 }
 215
 216 impl KeyProvider {
 217         fn make_revoked_commitment_cell(&self, commitment_seed: [u8; 32]) -> Arc<Mutex<u64>> {
 218                 let mut revoked_commitments = self.revoked_commitments.lock().unwrap();
 219                 if !revoked_commitments.contains_key(&commitment_seed) {
 220                         revoked_commitments.insert(commitment_seed, Arc::new(Mutex::new(INITIAL_REVOKED_COMMITMENT_NUMBER)));
 221                 }
 222                 let cell = revoked_commitments.get(&commitment_seed).unwrap();
 223                 Arc::clone(cell)
 224         }
 225 }
 226
 227 #[inline]
 228 fn check_api_err(api_err: APIError) {
 229         match api_err {
 230                 APIError::APIMisuseError { .. } => panic!("We can't misuse the API"),
 231                 APIError::FeeRateTooHigh { .. } => panic!("We can't send too much fee?"),
 232                 APIError::RouteError { .. } => panic!("Our routes should work"),
 233                 APIError::ChannelUnavailable { err } => {
 234                         // Test the error against a list of errors we can hit, and reject
 235                         // all others. If you hit this panic, the list of acceptable errors
 236                         // is probably just stale and you should add new messages here.
 237                         match err.as_str() {
 238                                 "Peer for first hop currently disconnected/pending monitor update!" => {},
 239                                 _ if err.starts_with("Cannot push more than their max accepted HTLCs ") => {},
 240                                 _ if err.starts_with("Cannot send value that would put us over the max HTLC value in flight our peer will accept ") => {},
 241                                 _ if err.starts_with("Cannot send value that would put our balance under counterparty-announced channel reserve value") => {},
 242                                 _ if err.starts_with("Cannot send value that would overdraw remaining funds.") => {},
 243                                 _ if err.starts_with("Cannot send value that would not leave enough to pay for fees.") => {},
 244                                 _ => panic!("{}", err),
 245                         }
 246                 },
 247                 APIError::MonitorUpdateFailed => {
 248                         // We can (obviously) temp-fail a monitor update
 249                 },
 250         }
 251 }
 252 #[inline]
 253 fn check_payment_err(send_err: PaymentSendFailure) {
 254         match send_err {
 255                 PaymentSendFailure::ParameterError(api_err) => check_api_err(api_err),
 256                 PaymentSendFailure::PathParameterError(per_path_results) => {
 257                         for res in per_path_results { if let Err(api_err) = res { check_api_err(api_err); } }
 258                 },
 259                 PaymentSendFailure::AllFailedRetrySafe(per_path_results) => {
 260                         for api_err in per_path_results { check_api_err(api_err); }
 261                 },
 262                 PaymentSendFailure::PartialFailure(per_path_results) => {
 263                         for res in per_path_results { if let Err(api_err) = res { check_api_err(api_err); } }
 264                 },
 265         }
 266 }
 267
 268 type ChanMan = ChannelManager<EnforcingSigner, Arc<TestChainMonitor>, Arc<TestBroadcaster>, Arc<KeyProvider>, Arc<FuzzEstimator>, Arc<dyn Logger>>;
 269
 270 #[inline]
 271 fn get_payment_secret_hash(dest: &ChanMan, payment_id: &mut u8) -> Option<(PaymentSecret, PaymentHash)> {
 272         let mut payment_hash;
 273         for _ in 0..256 {
 274                 payment_hash = PaymentHash(Sha256::hash(&[*payment_id; 1]).into_inner());
 275                 if let Ok(payment_secret) = dest.create_inbound_payment_for_hash(payment_hash, None, 7200, 0) {
 276                         return Some((payment_secret, payment_hash));
 277                 }
 278                 *payment_id = payment_id.wrapping_add(1);
 279         }
 280         None
 281 }
 282
 283 #[inline]
 284 fn send_payment(source: &ChanMan, dest: &ChanMan, dest_chan_id: u64, amt: u64, payment_id: &mut u8) -> bool {
 285         let (payment_secret, payment_hash) =
 286                 if let Some((secret, hash)) = get_payment_secret_hash(dest, payment_id) { (secret, hash) } else { return true; };
 287         if let Err(err) = source.send_payment(&Route {
 288                 paths: vec![vec![RouteHop {
 289                         pubkey: dest.get_our_node_id(),
 290                         node_features: NodeFeatures::known(),
 291                         short_channel_id: dest_chan_id,
 292                         channel_features: ChannelFeatures::known(),
 293                         fee_msat: amt,
 294                         cltv_expiry_delta: 200,
 295                 }]],
 296         }, payment_hash, &Some(payment_secret)) {
 297                 check_payment_err(err);
 298                 false
 299         } else { true }
 300 }
 301 #[inline]
 302 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 {
 303         let (payment_secret, payment_hash) =
 304                 if let Some((secret, hash)) = get_payment_secret_hash(dest, payment_id) { (secret, hash) } else { return true; };
 305         if let Err(err) = source.send_payment(&Route {
 306                 paths: vec![vec![RouteHop {
 307                         pubkey: middle.get_our_node_id(),
 308                         node_features: NodeFeatures::known(),
 309                         short_channel_id: middle_chan_id,
 310                         channel_features: ChannelFeatures::known(),
 311                         fee_msat: 50000,
 312                         cltv_expiry_delta: 100,
 313                 },RouteHop {
 314                         pubkey: dest.get_our_node_id(),
 315                         node_features: NodeFeatures::known(),
 316                         short_channel_id: dest_chan_id,
 317                         channel_features: ChannelFeatures::known(),
 318                         fee_msat: amt,
 319                         cltv_expiry_delta: 200,
 320                 }]],
 321         }, payment_hash, &Some(payment_secret)) {
 322                 check_payment_err(err);
 323                 false
 324         } else { true }
 325 }
 326
 327 #[inline]
 328 pub fn do_test<Out: test_logger::Output>(data: &[u8], out: Out) {
 329         let fee_est = Arc::new(FuzzEstimator{});
 330         let broadcast = Arc::new(TestBroadcaster{});
 331
 332         macro_rules! make_node {
 333                 ($node_id: expr) => { {
 334                         let logger: Arc<dyn Logger> = Arc::new(test_logger::TestLogger::new($node_id.to_string(), out.clone()));
 335                         let monitor = Arc::new(TestChainMonitor::new(broadcast.clone(), logger.clone(), fee_est.clone(), Arc::new(TestPersister{})));
 336
 337                         let keys_manager = Arc::new(KeyProvider { node_id: $node_id, rand_bytes_id: atomic::AtomicU8::new(0), revoked_commitments: Mutex::new(HashMap::new()) });
 338                         let mut config = UserConfig::default();
 339                         config.channel_options.fee_proportional_millionths = 0;
 340                         config.channel_options.announced_channel = true;
 341                         config.peer_channel_config_limits.min_dust_limit_satoshis = 0;
 342                         let network = Network::Bitcoin;
 343                         let params = ChainParameters {
 344                                 network,
 345                                 best_block: BestBlock::from_genesis(network),
 346                         };
 347                         (ChannelManager::new(fee_est.clone(), monitor.clone(), broadcast.clone(), Arc::clone(&logger), keys_manager.clone(), config, params),
 348                         monitor, keys_manager)
 349                 } }
 350         }
 351
 352         macro_rules! reload_node {
 353                 ($ser: expr, $node_id: expr, $old_monitors: expr, $keys_manager: expr) => { {
 354                     let keys_manager = Arc::clone(& $keys_manager);
 355                         let logger: Arc<dyn Logger> = Arc::new(test_logger::TestLogger::new($node_id.to_string(), out.clone()));
 356                         let chain_monitor = Arc::new(TestChainMonitor::new(broadcast.clone(), logger.clone(), fee_est.clone(), Arc::new(TestPersister{})));
 357
 358                         let mut config = UserConfig::default();
 359                         config.channel_options.fee_proportional_millionths = 0;
 360                         config.channel_options.announced_channel = true;
 361                         config.peer_channel_config_limits.min_dust_limit_satoshis = 0;
 362
 363                         let mut monitors = HashMap::new();
 364                         let mut old_monitors = $old_monitors.latest_monitors.lock().unwrap();
 365                         for (outpoint, (update_id, monitor_ser)) in old_monitors.drain() {
 366                                 monitors.insert(outpoint, <(BlockHash, ChannelMonitor<EnforcingSigner>)>::read(&mut Cursor::new(&monitor_ser), &OnlyReadsKeysInterface {}).expect("Failed to read monitor").1);
 367                                 chain_monitor.latest_monitors.lock().unwrap().insert(outpoint, (update_id, monitor_ser));
 368                         }
 369                         let mut monitor_refs = HashMap::new();
 370                         for (outpoint, monitor) in monitors.iter_mut() {
 371                                 monitor_refs.insert(*outpoint, monitor);
 372                         }
 373
 374                         let read_args = ChannelManagerReadArgs {
 375                                 keys_manager,
 376                                 fee_estimator: fee_est.clone(),
 377                                 chain_monitor: chain_monitor.clone(),
 378                                 tx_broadcaster: broadcast.clone(),
 379                                 logger,
 380                                 default_config: config,
 381                                 channel_monitors: monitor_refs,
 382                         };
 383
 384                         (<(BlockHash, ChanMan)>::read(&mut Cursor::new(&$ser.0), read_args).expect("Failed to read manager").1, chain_monitor)
 385                 } }
 386         }
 387
 388         let mut channel_txn = Vec::new();
 389         macro_rules! make_channel {
 390                 ($source: expr, $dest: expr, $chan_id: expr) => { {
 391                         $source.create_channel($dest.get_our_node_id(), 100_000, 42, 0, None).unwrap();
 392                         let open_channel = {
 393                                 let events = $source.get_and_clear_pending_msg_events();
 394                                 assert_eq!(events.len(), 1);
 395                                 if let events::MessageSendEvent::SendOpenChannel { ref msg, .. } = events[0] {
 396                                         msg.clone()
 397                                 } else { panic!("Wrong event type"); }
 398                         };
 399
 400                         $dest.handle_open_channel(&$source.get_our_node_id(), InitFeatures::known(), &open_channel);
 401                         let accept_channel = {
 402                                 let events = $dest.get_and_clear_pending_msg_events();
 403                                 assert_eq!(events.len(), 1);
 404                                 if let events::MessageSendEvent::SendAcceptChannel { ref msg, .. } = events[0] {
 405                                         msg.clone()
 406                                 } else { panic!("Wrong event type"); }
 407                         };
 408
 409                         $source.handle_accept_channel(&$dest.get_our_node_id(), InitFeatures::known(), &accept_channel);
 410                         let funding_output;
 411                         {
 412                                 let events = $source.get_and_clear_pending_events();
 413                                 assert_eq!(events.len(), 1);
 414                                 if let events::Event::FundingGenerationReady { ref temporary_channel_id, ref channel_value_satoshis, ref output_script, .. } = events[0] {
 415                                         let tx = Transaction { version: $chan_id, lock_time: 0, input: Vec::new(), output: vec![TxOut {
 416                                                 value: *channel_value_satoshis, script_pubkey: output_script.clone(),
 417                                         }]};
 418                                         funding_output = OutPoint { txid: tx.txid(), index: 0 };
 419                                         $source.funding_transaction_generated(&temporary_channel_id, tx.clone()).unwrap();
 420                                         channel_txn.push(tx);
 421                                 } else { panic!("Wrong event type"); }
 422                         }
 423
 424                         let funding_created = {
 425                                 let events = $source.get_and_clear_pending_msg_events();
 426                                 assert_eq!(events.len(), 1);
 427                                 if let events::MessageSendEvent::SendFundingCreated { ref msg, .. } = events[0] {
 428                                         msg.clone()
 429                                 } else { panic!("Wrong event type"); }
 430                         };
 431                         $dest.handle_funding_created(&$source.get_our_node_id(), &funding_created);
 432
 433                         let funding_signed = {
 434                                 let events = $dest.get_and_clear_pending_msg_events();
 435                                 assert_eq!(events.len(), 1);
 436                                 if let events::MessageSendEvent::SendFundingSigned { ref msg, .. } = events[0] {
 437                                         msg.clone()
 438                                 } else { panic!("Wrong event type"); }
 439                         };
 440                         $source.handle_funding_signed(&$dest.get_our_node_id(), &funding_signed);
 441
 442                         funding_output
 443                 } }
 444         }
 445
 446         macro_rules! confirm_txn {
 447                 ($node: expr) => { {
 448                         let chain_hash = genesis_block(Network::Bitcoin).block_hash();
 449                         let mut header = BlockHeader { version: 0x20000000, prev_blockhash: chain_hash, merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
 450                         let txdata: Vec<_> = channel_txn.iter().enumerate().map(|(i, tx)| (i + 1, tx)).collect();
 451                         $node.transactions_confirmed(&header, &txdata, 1);
 452                         for _ in 2..100 {
 453                                 header = BlockHeader { version: 0x20000000, prev_blockhash: header.block_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
 454                         }
 455                         $node.best_block_updated(&header, 99);
 456                 } }
 457         }
 458
 459         macro_rules! lock_fundings {
 460                 ($nodes: expr) => { {
 461                         let mut node_events = Vec::new();
 462                         for node in $nodes.iter() {
 463                                 node_events.push(node.get_and_clear_pending_msg_events());
 464                         }
 465                         for (idx, node_event) in node_events.iter().enumerate() {
 466                                 for event in node_event {
 467                                         if let events::MessageSendEvent::SendFundingLocked { ref node_id, ref msg } = event {
 468                                                 for node in $nodes.iter() {
 469                                                         if node.get_our_node_id() == *node_id {
 470                                                                 node.handle_funding_locked(&$nodes[idx].get_our_node_id(), msg);
 471                                                         }
 472                                                 }
 473                                         } else { panic!("Wrong event type"); }
 474                                 }
 475                         }
 476
 477                         for node in $nodes.iter() {
 478                                 let events = node.get_and_clear_pending_msg_events();
 479                                 for event in events {
 480                                         if let events::MessageSendEvent::SendAnnouncementSignatures { .. } = event {
 481                                         } else { panic!("Wrong event type"); }
 482                                 }
 483                         }
 484                 } }
 485         }
 486
 487         // 3 nodes is enough to hit all the possible cases, notably unknown-source-unknown-dest
 488         // forwarding.
 489         let (node_a, mut monitor_a, keys_manager_a) = make_node!(0);
 490         let (node_b, mut monitor_b, keys_manager_b) = make_node!(1);
 491         let (node_c, mut monitor_c, keys_manager_c) = make_node!(2);
 492
 493         let mut nodes = [node_a, node_b, node_c];
 494
 495         let chan_1_funding = make_channel!(nodes[0], nodes[1], 0);
 496         let chan_2_funding = make_channel!(nodes[1], nodes[2], 1);
 497
 498         for node in nodes.iter() {
 499                 confirm_txn!(node);
 500         }
 501
 502         lock_fundings!(nodes);
 503
 504         let chan_a = nodes[0].list_usable_channels()[0].short_channel_id.unwrap();
 505         let chan_b = nodes[2].list_usable_channels()[0].short_channel_id.unwrap();
 506
 507         let mut payment_id: u8 = 0;
 508
 509         let mut chan_a_disconnected = false;
 510         let mut chan_b_disconnected = false;
 511         let mut ba_events = Vec::new();
 512         let mut bc_events = Vec::new();
 513
 514         let mut node_a_ser = VecWriter(Vec::new());
 515         nodes[0].write(&mut node_a_ser).unwrap();
 516         let mut node_b_ser = VecWriter(Vec::new());
 517         nodes[1].write(&mut node_b_ser).unwrap();
 518         let mut node_c_ser = VecWriter(Vec::new());
 519         nodes[2].write(&mut node_c_ser).unwrap();
 520
 521         macro_rules! test_return {
 522                 () => { {
 523                         assert_eq!(nodes[0].list_channels().len(), 1);
 524                         assert_eq!(nodes[1].list_channels().len(), 2);
 525                         assert_eq!(nodes[2].list_channels().len(), 1);
 526                         return;
 527                 } }
 528         }
 529
 530         let mut read_pos = 0;
 531         macro_rules! get_slice {
 532                 ($len: expr) => {
 533                         {
 534                                 let slice_len = $len as usize;
 535                                 if data.len() < read_pos + slice_len {
 536                                         test_return!();
 537                                 }
 538                                 read_pos += slice_len;
 539                                 &data[read_pos - slice_len..read_pos]
 540                         }
 541                 }
 542         }
 543
 544         loop {
 545                 macro_rules! process_msg_events {
 546                         ($node: expr, $corrupt_forward: expr) => { {
 547                                 let events = if $node == 1 {
 548                                         let mut new_events = Vec::new();
 549                                         mem::swap(&mut new_events, &mut ba_events);
 550                                         new_events.extend_from_slice(&bc_events[..]);
 551                                         bc_events.clear();
 552                                         new_events
 553                                 } else { Vec::new() };
 554                                 let mut had_events = false;
 555                                 for event in events.iter().chain(nodes[$node].get_and_clear_pending_msg_events().iter()) {
 556                                         had_events = true;
 557                                         match event {
 558                                                 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 } } => {
 559                                                         for dest in nodes.iter() {
 560                                                                 if dest.get_our_node_id() == *node_id {
 561                                                                         assert!(update_fee.is_none());
 562                                                                         for update_add in update_add_htlcs {
 563                                                                                 if !$corrupt_forward {
 564                                                                                         dest.handle_update_add_htlc(&nodes[$node].get_our_node_id(), &update_add);
 565                                                                                 } else {
 566                                                                                         // Corrupt the update_add_htlc message so that its HMAC
 567                                                                                         // check will fail and we generate a
 568                                                                                         // update_fail_malformed_htlc instead of an
 569                                                                                         // update_fail_htlc as we do when we reject a payment.
 570                                                                                         let mut msg_ser = update_add.encode();
 571                                                                                         msg_ser[1000] ^= 0xff;
 572                                                                                         let new_msg = UpdateAddHTLC::read(&mut Cursor::new(&msg_ser)).unwrap();
 573                                                                                         dest.handle_update_add_htlc(&nodes[$node].get_our_node_id(), &new_msg);
 574                                                                                 }
 575                                                                         }
 576                                                                         for update_fulfill in update_fulfill_htlcs {
 577                                                                                 dest.handle_update_fulfill_htlc(&nodes[$node].get_our_node_id(), &update_fulfill);
 578                                                                         }
 579                                                                         for update_fail in update_fail_htlcs {
 580                                                                                 dest.handle_update_fail_htlc(&nodes[$node].get_our_node_id(), &update_fail);
 581                                                                         }
 582                                                                         for update_fail_malformed in update_fail_malformed_htlcs {
 583                                                                                 dest.handle_update_fail_malformed_htlc(&nodes[$node].get_our_node_id(), &update_fail_malformed);
 584                                                                         }
 585                                                                         dest.handle_commitment_signed(&nodes[$node].get_our_node_id(), &commitment_signed);
 586                                                                 }
 587                                                         }
 588                                                 },
 589                                                 events::MessageSendEvent::SendRevokeAndACK { ref node_id, ref msg } => {
 590                                                         for dest in nodes.iter() {
 591                                                                 if dest.get_our_node_id() == *node_id {
 592                                                                         dest.handle_revoke_and_ack(&nodes[$node].get_our_node_id(), msg);
 593                                                                 }
 594                                                         }
 595                                                 },
 596                                                 events::MessageSendEvent::SendChannelReestablish { ref node_id, ref msg } => {
 597                                                         for dest in nodes.iter() {
 598                                                                 if dest.get_our_node_id() == *node_id {
 599                                                                         dest.handle_channel_reestablish(&nodes[$node].get_our_node_id(), msg);
 600                                                                 }
 601                                                         }
 602                                                 },
 603                                                 events::MessageSendEvent::SendFundingLocked { .. } => {
 604                                                         // Can be generated as a reestablish response
 605                                                 },
 606                                                 events::MessageSendEvent::PaymentFailureNetworkUpdate { .. } => {
 607                                                         // Can be generated due to a payment forward being rejected due to a
 608                                                         // channel having previously failed a monitor update
 609                                                 },
 610                                                 _ => panic!("Unhandled message event"),
 611                                         }
 612                                 }
 613                                 had_events
 614                         } }
 615                 }
 616
 617                 macro_rules! drain_msg_events_on_disconnect {
 618                         ($counterparty_id: expr) => { {
 619                                 if $counterparty_id == 0 {
 620                                         for event in nodes[0].get_and_clear_pending_msg_events() {
 621                                                 match event {
 622                                                         events::MessageSendEvent::UpdateHTLCs { .. } => {},
 623                                                         events::MessageSendEvent::SendRevokeAndACK { .. } => {},
 624                                                         events::MessageSendEvent::SendChannelReestablish { .. } => {},
 625                                                         events::MessageSendEvent::SendFundingLocked { .. } => {},
 626                                                         events::MessageSendEvent::PaymentFailureNetworkUpdate { .. } => {},
 627                                                         events::MessageSendEvent::HandleError { action: ErrorAction::IgnoreError, .. } => {},
 628                                                         _ => panic!("Unhandled message event"),
 629                                                 }
 630                                         }
 631                                         ba_events.clear();
 632                                 } else {
 633                                         for event in nodes[2].get_and_clear_pending_msg_events() {
 634                                                 match event {
 635                                                         events::MessageSendEvent::UpdateHTLCs { .. } => {},
 636                                                         events::MessageSendEvent::SendRevokeAndACK { .. } => {},
 637                                                         events::MessageSendEvent::SendChannelReestablish { .. } => {},
 638                                                         events::MessageSendEvent::SendFundingLocked { .. } => {},
 639                                                         events::MessageSendEvent::PaymentFailureNetworkUpdate { .. } => {},
 640                                                         events::MessageSendEvent::HandleError { action: ErrorAction::IgnoreError, .. } => {},
 641                                                         _ => panic!("Unhandled message event"),
 642                                                 }
 643                                         }
 644                                         bc_events.clear();
 645                                 }
 646                                 let mut events = nodes[1].get_and_clear_pending_msg_events();
 647                                 let drop_node_id = if $counterparty_id == 0 { nodes[0].get_our_node_id() } else { nodes[2].get_our_node_id() };
 648                                 let msg_sink = if $counterparty_id == 0 { &mut bc_events } else { &mut ba_events };
 649                                 for event in events.drain(..) {
 650                                         let push = match event {
 651                                                 events::MessageSendEvent::UpdateHTLCs { ref node_id, .. } => {
 652                                                         if *node_id != drop_node_id { true } else { false }
 653                                                 },
 654                                                 events::MessageSendEvent::SendRevokeAndACK { ref node_id, .. } => {
 655                                                         if *node_id != drop_node_id { true } else { false }
 656                                                 },
 657                                                 events::MessageSendEvent::SendChannelReestablish { ref node_id, .. } => {
 658                                                         if *node_id != drop_node_id { true } else { false }
 659                                                 },
 660                                                 events::MessageSendEvent::SendFundingLocked { .. } => false,
 661                                                 events::MessageSendEvent::PaymentFailureNetworkUpdate { .. } => false,
 662                                                 events::MessageSendEvent::HandleError { action: ErrorAction::IgnoreError, .. } => false,
 663                                                 _ => panic!("Unhandled message event"),
 664                                         };
 665                                         if push { msg_sink.push(event); }
 666                                 }
 667                         } }
 668                 }
 669
 670                 macro_rules! process_events {
 671                         ($node: expr, $fail: expr) => { {
 672                                 // In case we get 256 payments we may have a hash collision, resulting in the
 673                                 // second claim/fail call not finding the duplicate-hash HTLC, so we have to
 674                                 // deduplicate the calls here.
 675                                 let mut claim_set = HashSet::new();
 676                                 let mut events = nodes[$node].get_and_clear_pending_events();
 677                                 // Sort events so that PendingHTLCsForwardable get processed last. This avoids a
 678                                 // case where we first process a PendingHTLCsForwardable, then claim/fail on a
 679                                 // PaymentReceived, claiming/failing two HTLCs, but leaving a just-generated
 680                                 // PaymentReceived event for the second HTLC in our pending_events (and breaking
 681                                 // our claim_set deduplication).
 682                                 events.sort_by(|a, b| {
 683                                         if let events::Event::PaymentReceived { .. } = a {
 684                                                 if let events::Event::PendingHTLCsForwardable { .. } = b {
 685                                                         Ordering::Less
 686                                                 } else { Ordering::Equal }
 687                                         } else if let events::Event::PendingHTLCsForwardable { .. } = a {
 688                                                 if let events::Event::PaymentReceived { .. } = b {
 689                                                         Ordering::Greater
 690                                                 } else { Ordering::Equal }
 691                                         } else { Ordering::Equal }
 692                                 });
 693                                 let had_events = !events.is_empty();
 694                                 for event in events.drain(..) {
 695                                         match event {
 696                                                 events::Event::PaymentReceived { payment_hash, .. } => {
 697                                                         if claim_set.insert(payment_hash.0) {
 698                                                                 if $fail {
 699                                                                         assert!(nodes[$node].fail_htlc_backwards(&payment_hash));
 700                                                                 } else {
 701                                                                         assert!(nodes[$node].claim_funds(PaymentPreimage(payment_hash.0)));
 702                                                                 }
 703                                                         }
 704                                                 },
 705                                                 events::Event::PaymentSent { .. } => {},
 706                                                 events::Event::PaymentFailed { .. } => {},
 707                                                 events::Event::PendingHTLCsForwardable { .. } => {
 708                                                         nodes[$node].process_pending_htlc_forwards();
 709                                                 },
 710                                                 _ => panic!("Unhandled event"),
 711                                         }
 712                                 }
 713                                 had_events
 714                         } }
 715                 }
 716
 717                 match get_slice!(1)[0] {
 718                         // In general, we keep related message groups close together in binary form, allowing
 719                         // bit-twiddling mutations to have similar effects. This is probably overkill, but no
 720                         // harm in doing so.
 721
 722                         0x00 => *monitor_a.update_ret.lock().unwrap() = Err(ChannelMonitorUpdateErr::TemporaryFailure),
 723                         0x01 => *monitor_b.update_ret.lock().unwrap() = Err(ChannelMonitorUpdateErr::TemporaryFailure),
 724                         0x02 => *monitor_c.update_ret.lock().unwrap() = Err(ChannelMonitorUpdateErr::TemporaryFailure),
 725                         0x04 => *monitor_a.update_ret.lock().unwrap() = Ok(()),
 726                         0x05 => *monitor_b.update_ret.lock().unwrap() = Ok(()),
 727                         0x06 => *monitor_c.update_ret.lock().unwrap() = Ok(()),
 728
 729                         0x08 => {
 730                                 if let Some((id, _)) = monitor_a.latest_monitors.lock().unwrap().get(&chan_1_funding) {
 731                                         nodes[0].channel_monitor_updated(&chan_1_funding, *id);
 732                                 }
 733                         },
 734                         0x09 => {
 735                                 if let Some((id, _)) = monitor_b.latest_monitors.lock().unwrap().get(&chan_1_funding) {
 736                                         nodes[1].channel_monitor_updated(&chan_1_funding, *id);
 737                                 }
 738                         },
 739                         0x0a => {
 740                                 if let Some((id, _)) = monitor_b.latest_monitors.lock().unwrap().get(&chan_2_funding) {
 741                                         nodes[1].channel_monitor_updated(&chan_2_funding, *id);
 742                                 }
 743                         },
 744                         0x0b => {
 745                                 if let Some((id, _)) = monitor_c.latest_monitors.lock().unwrap().get(&chan_2_funding) {
 746                                         nodes[2].channel_monitor_updated(&chan_2_funding, *id);
 747                                 }
 748                         },
 749
 750                         0x0c => {
 751                                 if !chan_a_disconnected {
 752                                         nodes[0].peer_disconnected(&nodes[1].get_our_node_id(), false);
 753                                         nodes[1].peer_disconnected(&nodes[0].get_our_node_id(), false);
 754                                         chan_a_disconnected = true;
 755                                         drain_msg_events_on_disconnect!(0);
 756                                 }
 757                         },
 758                         0x0d => {
 759                                 if !chan_b_disconnected {
 760                                         nodes[1].peer_disconnected(&nodes[2].get_our_node_id(), false);
 761                                         nodes[2].peer_disconnected(&nodes[1].get_our_node_id(), false);
 762                                         chan_b_disconnected = true;
 763                                         drain_msg_events_on_disconnect!(2);
 764                                 }
 765                         },
 766                         0x0e => {
 767                                 if chan_a_disconnected {
 768                                         nodes[0].peer_connected(&nodes[1].get_our_node_id(), &Init { features: InitFeatures::known() });
 769                                         nodes[1].peer_connected(&nodes[0].get_our_node_id(), &Init { features: InitFeatures::known() });
 770                                         chan_a_disconnected = false;
 771                                 }
 772                         },
 773                         0x0f => {
 774                                 if chan_b_disconnected {
 775                                         nodes[1].peer_connected(&nodes[2].get_our_node_id(), &Init { features: InitFeatures::known() });
 776                                         nodes[2].peer_connected(&nodes[1].get_our_node_id(), &Init { features: InitFeatures::known() });
 777                                         chan_b_disconnected = false;
 778                                 }
 779                         },
 780
 781                         0x10 => { process_msg_events!(0, true); },
 782                         0x11 => { process_msg_events!(0, false); },
 783                         0x12 => { process_events!(0, true); },
 784                         0x13 => { process_events!(0, false); },
 785                         0x14 => { process_msg_events!(1, true); },
 786                         0x15 => { process_msg_events!(1, false); },
 787                         0x16 => { process_events!(1, true); },
 788                         0x17 => { process_events!(1, false); },
 789                         0x18 => { process_msg_events!(2, true); },
 790                         0x19 => { process_msg_events!(2, false); },
 791                         0x1a => { process_events!(2, true); },
 792                         0x1b => { process_events!(2, false); },
 793
 794                         0x1c => {
 795                                 if !chan_a_disconnected {
 796                                         nodes[1].peer_disconnected(&nodes[0].get_our_node_id(), false);
 797                                         chan_a_disconnected = true;
 798                                         drain_msg_events_on_disconnect!(0);
 799                                 }
 800                                 let (new_node_a, new_monitor_a) = reload_node!(node_a_ser, 0, monitor_a, keys_manager_a);
 801                                 nodes[0] = new_node_a;
 802                                 monitor_a = new_monitor_a;
 803                         },
 804                         0x1d => {
 805                                 if !chan_a_disconnected {
 806                                         nodes[0].peer_disconnected(&nodes[1].get_our_node_id(), false);
 807                                         chan_a_disconnected = true;
 808                                         nodes[0].get_and_clear_pending_msg_events();
 809                                         ba_events.clear();
 810                                 }
 811                                 if !chan_b_disconnected {
 812                                         nodes[2].peer_disconnected(&nodes[1].get_our_node_id(), false);
 813                                         chan_b_disconnected = true;
 814                                         nodes[2].get_and_clear_pending_msg_events();
 815                                         bc_events.clear();
 816                                 }
 817                                 let (new_node_b, new_monitor_b) = reload_node!(node_b_ser, 1, monitor_b, keys_manager_b);
 818                                 nodes[1] = new_node_b;
 819                                 monitor_b = new_monitor_b;
 820                         },
 821                         0x1e => {
 822                                 if !chan_b_disconnected {
 823                                         nodes[1].peer_disconnected(&nodes[2].get_our_node_id(), false);
 824                                         chan_b_disconnected = true;
 825                                         drain_msg_events_on_disconnect!(2);
 826                                 }
 827                                 let (new_node_c, new_monitor_c) = reload_node!(node_c_ser, 2, monitor_c, keys_manager_c);
 828                                 nodes[2] = new_node_c;
 829                                 monitor_c = new_monitor_c;
 830                         },
 831
 832                         // 1/10th the channel size:
 833                         0x20 => { send_payment(&nodes[0], &nodes[1], chan_a, 10_000_000, &mut payment_id); },
 834                         0x21 => { send_payment(&nodes[1], &nodes[0], chan_a, 10_000_000, &mut payment_id); },
 835                         0x22 => { send_payment(&nodes[1], &nodes[2], chan_b, 10_000_000, &mut payment_id); },
 836                         0x23 => { send_payment(&nodes[2], &nodes[1], chan_b, 10_000_000, &mut payment_id); },
 837                         0x24 => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 10_000_000, &mut payment_id); },
 838                         0x25 => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 10_000_000, &mut payment_id); },
 839
 840                         0x28 => { send_payment(&nodes[0], &nodes[1], chan_a, 1_000_000, &mut payment_id); },
 841                         0x29 => { send_payment(&nodes[1], &nodes[0], chan_a, 1_000_000, &mut payment_id); },
 842                         0x2a => { send_payment(&nodes[1], &nodes[2], chan_b, 1_000_000, &mut payment_id); },
 843                         0x2b => { send_payment(&nodes[2], &nodes[1], chan_b, 1_000_000, &mut payment_id); },
 844                         0x2c => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 1_000_000, &mut payment_id); },
 845                         0x2d => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 1_000_000, &mut payment_id); },
 846
 847                         0x30 => { send_payment(&nodes[0], &nodes[1], chan_a, 100_000, &mut payment_id); },
 848                         0x31 => { send_payment(&nodes[1], &nodes[0], chan_a, 100_000, &mut payment_id); },
 849                         0x32 => { send_payment(&nodes[1], &nodes[2], chan_b, 100_000, &mut payment_id); },
 850                         0x33 => { send_payment(&nodes[2], &nodes[1], chan_b, 100_000, &mut payment_id); },
 851                         0x34 => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 100_000, &mut payment_id); },
 852                         0x35 => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 100_000, &mut payment_id); },
 853
 854                         0x38 => { send_payment(&nodes[0], &nodes[1], chan_a, 10_000, &mut payment_id); },
 855                         0x39 => { send_payment(&nodes[1], &nodes[0], chan_a, 10_000, &mut payment_id); },
 856                         0x3a => { send_payment(&nodes[1], &nodes[2], chan_b, 10_000, &mut payment_id); },
 857                         0x3b => { send_payment(&nodes[2], &nodes[1], chan_b, 10_000, &mut payment_id); },
 858                         0x3c => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 10_000, &mut payment_id); },
 859                         0x3d => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 10_000, &mut payment_id); },
 860
 861                         0x40 => { send_payment(&nodes[0], &nodes[1], chan_a, 1_000, &mut payment_id); },
 862                         0x41 => { send_payment(&nodes[1], &nodes[0], chan_a, 1_000, &mut payment_id); },
 863                         0x42 => { send_payment(&nodes[1], &nodes[2], chan_b, 1_000, &mut payment_id); },
 864                         0x43 => { send_payment(&nodes[2], &nodes[1], chan_b, 1_000, &mut payment_id); },
 865                         0x44 => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 1_000, &mut payment_id); },
 866                         0x45 => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 1_000, &mut payment_id); },
 867
 868                         0x48 => { send_payment(&nodes[0], &nodes[1], chan_a, 100, &mut payment_id); },
 869                         0x49 => { send_payment(&nodes[1], &nodes[0], chan_a, 100, &mut payment_id); },
 870                         0x4a => { send_payment(&nodes[1], &nodes[2], chan_b, 100, &mut payment_id); },
 871                         0x4b => { send_payment(&nodes[2], &nodes[1], chan_b, 100, &mut payment_id); },
 872                         0x4c => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 100, &mut payment_id); },
 873                         0x4d => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 100, &mut payment_id); },
 874
 875                         0x50 => { send_payment(&nodes[0], &nodes[1], chan_a, 10, &mut payment_id); },
 876                         0x51 => { send_payment(&nodes[1], &nodes[0], chan_a, 10, &mut payment_id); },
 877                         0x52 => { send_payment(&nodes[1], &nodes[2], chan_b, 10, &mut payment_id); },
 878                         0x53 => { send_payment(&nodes[2], &nodes[1], chan_b, 10, &mut payment_id); },
 879                         0x54 => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 10, &mut payment_id); },
 880                         0x55 => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 10, &mut payment_id); },
 881
 882                         0x58 => { send_payment(&nodes[0], &nodes[1], chan_a, 1, &mut payment_id); },
 883                         0x59 => { send_payment(&nodes[1], &nodes[0], chan_a, 1, &mut payment_id); },
 884                         0x5a => { send_payment(&nodes[1], &nodes[2], chan_b, 1, &mut payment_id); },
 885                         0x5b => { send_payment(&nodes[2], &nodes[1], chan_b, 1, &mut payment_id); },
 886                         0x5c => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 1, &mut payment_id); },
 887                         0x5d => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 1, &mut payment_id); },
 888
 889                         0xff => {
 890                                 // Test that no channel is in a stuck state where neither party can send funds even
 891                                 // after we resolve all pending events.
 892                                 // First make sure there are no pending monitor updates, resetting the error state
 893                                 // and calling channel_monitor_updated for each monitor.
 894                                 *monitor_a.update_ret.lock().unwrap() = Ok(());
 895                                 *monitor_b.update_ret.lock().unwrap() = Ok(());
 896                                 *monitor_c.update_ret.lock().unwrap() = Ok(());
 897
 898                                 if let Some((id, _)) = monitor_a.latest_monitors.lock().unwrap().get(&chan_1_funding) {
 899                                         nodes[0].channel_monitor_updated(&chan_1_funding, *id);
 900                                 }
 901                                 if let Some((id, _)) = monitor_b.latest_monitors.lock().unwrap().get(&chan_1_funding) {
 902                                         nodes[1].channel_monitor_updated(&chan_1_funding, *id);
 903                                 }
 904                                 if let Some((id, _)) = monitor_b.latest_monitors.lock().unwrap().get(&chan_2_funding) {
 905                                         nodes[1].channel_monitor_updated(&chan_2_funding, *id);
 906                                 }
 907                                 if let Some((id, _)) = monitor_c.latest_monitors.lock().unwrap().get(&chan_2_funding) {
 908                                         nodes[2].channel_monitor_updated(&chan_2_funding, *id);
 909                                 }
 910
 911                                 // Next, make sure peers are all connected to each other
 912                                 if chan_a_disconnected {
 913                                         nodes[0].peer_connected(&nodes[1].get_our_node_id(), &Init { features: InitFeatures::known() });
 914                                         nodes[1].peer_connected(&nodes[0].get_our_node_id(), &Init { features: InitFeatures::known() });
 915                                         chan_a_disconnected = false;
 916                                 }
 917                                 if chan_b_disconnected {
 918                                         nodes[1].peer_connected(&nodes[2].get_our_node_id(), &Init { features: InitFeatures::known() });
 919                                         nodes[2].peer_connected(&nodes[1].get_our_node_id(), &Init { features: InitFeatures::known() });
 920                                         chan_b_disconnected = false;
 921                                 }
 922
 923                                 for i in 0..std::usize::MAX {
 924                                         if i == 100 { panic!("It may take may iterations to settle the state, but it should not take forever"); }
 925                                         // Then, make sure any current forwards make their way to their destination
 926                                         if process_msg_events!(0, false) { continue; }
 927                                         if process_msg_events!(1, false) { continue; }
 928                                         if process_msg_events!(2, false) { continue; }
 929                                         // ...making sure any pending PendingHTLCsForwardable events are handled and
 930                                         // payments claimed.
 931                                         if process_events!(0, false) { continue; }
 932                                         if process_events!(1, false) { continue; }
 933                                         if process_events!(2, false) { continue; }
 934                                         break;
 935                                 }
 936
 937                                 // Finally, make sure that at least one end of each channel can make a substantial payment.
 938                                 assert!(
 939                                         send_payment(&nodes[0], &nodes[1], chan_a, 10_000_000, &mut payment_id) ||
 940                                         send_payment(&nodes[1], &nodes[0], chan_a, 10_000_000, &mut payment_id));
 941                                 assert!(
 942                                         send_payment(&nodes[1], &nodes[2], chan_b, 10_000_000, &mut payment_id) ||
 943                                         send_payment(&nodes[2], &nodes[1], chan_b, 10_000_000, &mut payment_id));
 944                         },
 945                         _ => test_return!(),
 946                 }
 947
 948                 node_a_ser.0.clear();
 949                 nodes[0].write(&mut node_a_ser).unwrap();
 950                 monitor_a.should_update_manager.store(false, atomic::Ordering::Relaxed);
 951                 node_b_ser.0.clear();
 952                 nodes[1].write(&mut node_b_ser).unwrap();
 953                 monitor_b.should_update_manager.store(false, atomic::Ordering::Relaxed);
 954                 node_c_ser.0.clear();
 955                 nodes[2].write(&mut node_c_ser).unwrap();
 956                 monitor_c.should_update_manager.store(false, atomic::Ordering::Relaxed);
 957         }
 958 }
 959
 960 pub fn chanmon_consistency_test<Out: test_logger::Output>(data: &[u8], out: Out) {
 961         do_test(data, out);
 962 }
 963
 964 #[no_mangle]
 965 pub extern "C" fn chanmon_consistency_run(data: *const u8, datalen: usize) {
 966         do_test(unsafe { std::slice::from_raw_parts(data, datalen) }, test_logger::DevNull{});
 967 }