_ 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::chainmonitor;
  34 use lightning::chain::channelmonitor;
  35 use lightning::chain::channelmonitor::{ChannelMonitor, ChannelMonitorUpdateErr, MonitorEvent};
  36 use lightning::chain::transaction::OutPoint;
  37 use lightning::chain::chaininterface::{BroadcasterInterface, ConfirmationTarget, FeeEstimator};
  38 use lightning::chain::keysinterface::{KeysInterface, InMemorySigner};
  39 use lightning::ln::channelmanager::{ChainParameters, ChannelManager, PaymentHash, PaymentPreimage, PaymentSecret, PaymentSendFailure, ChannelManagerReadArgs};
  40 use lightning::ln::features::{ChannelFeatures, InitFeatures, NodeFeatures};
  41 use lightning::ln::msgs::{CommitmentUpdate, ChannelMessageHandler, DecodeError, ErrorAction, UpdateAddHTLC, Init};
  42 use lightning::util::enforcing_trait_impls::{EnforcingSigner, INITIAL_REVOKED_COMMITMENT_NUMBER};
  43 use lightning::util::errors::APIError;
  44 use lightning::util::events;
  45 use lightning::util::logger::Logger;
  46 use lightning::util::config::UserConfig;
  47 use lightning::util::events::{EventsProvider, MessageSendEventsProvider};
  48 use lightning::util::ser::{Readable, ReadableArgs, Writeable, Writer};
  49 use lightning::util::test_utils::OnlyReadsKeysInterface;
  50 use lightning::routing::router::{Route, RouteHop};
  51
  52
  53 use utils::test_logger;
  54 use utils::test_persister::TestPersister;
  55
  56 use bitcoin::secp256k1::key::{PublicKey,SecretKey};
  57 use bitcoin::secp256k1::Secp256k1;
  58
  59 use std::mem;
  60 use std::cmp::Ordering;
  61 use std::collections::{HashSet, hash_map, HashMap};
  62 use std::sync::{Arc,Mutex};
  63 use std::sync::atomic;
  64 use std::io::Cursor;
  65
  66 struct FuzzEstimator {}
  67 impl FeeEstimator for FuzzEstimator {
  68         fn get_est_sat_per_1000_weight(&self, _: ConfirmationTarget) -> u32 {
  69                 253
  70         }
  71 }
  72
  73 pub struct TestBroadcaster {}
  74 impl BroadcasterInterface for TestBroadcaster {
  75         fn broadcast_transaction(&self, _tx: &Transaction) { }
  76 }
  77
  78 pub struct VecWriter(pub Vec<u8>);
  79 impl Writer for VecWriter {
  80         fn write_all(&mut self, buf: &[u8]) -> Result<(), ::std::io::Error> {
  81                 self.0.extend_from_slice(buf);
  82                 Ok(())
  83         }
  84         fn size_hint(&mut self, size: usize) {
  85                 self.0.reserve_exact(size);
  86         }
  87 }
  88
  89 struct TestChainMonitor {
  90         pub logger: Arc<dyn Logger>,
  91         pub chain_monitor: Arc<chainmonitor::ChainMonitor<EnforcingSigner, Arc<dyn chain::Filter>, Arc<TestBroadcaster>, Arc<FuzzEstimator>, Arc<dyn Logger>, Arc<TestPersister>>>,
  92         pub update_ret: Mutex<Result<(), channelmonitor::ChannelMonitorUpdateErr>>,
  93         // If we reload a node with an old copy of ChannelMonitors, the ChannelManager deserialization
  94         // logic will automatically force-close our channels for us (as we don't have an up-to-date
  95         // monitor implying we are not able to punish misbehaving counterparties). Because this test
  96         // "fails" if we ever force-close a channel, we avoid doing so, always saving the latest
  97         // fully-serialized monitor state here, as well as the corresponding update_id.
  98         pub latest_monitors: Mutex<HashMap<OutPoint, (u64, Vec<u8>)>>,
  99         pub should_update_manager: atomic::AtomicBool,
 100 }
 101 impl TestChainMonitor {
 102         pub fn new(broadcaster: Arc<TestBroadcaster>, logger: Arc<dyn Logger>, feeest: Arc<FuzzEstimator>, persister: Arc<TestPersister>) -> Self {
 103                 Self {
 104                         chain_monitor: Arc::new(chainmonitor::ChainMonitor::new(None, broadcaster, logger.clone(), feeest, persister)),
 105                         logger,
 106                         update_ret: Mutex::new(Ok(())),
 107                         latest_monitors: Mutex::new(HashMap::new()),
 108                         should_update_manager: atomic::AtomicBool::new(false),
 109                 }
 110         }
 111 }
 112 impl chain::Watch<EnforcingSigner> for TestChainMonitor {
 113         fn watch_channel(&self, funding_txo: OutPoint, monitor: channelmonitor::ChannelMonitor<EnforcingSigner>) -> Result<(), channelmonitor::ChannelMonitorUpdateErr> {
 114                 let mut ser = VecWriter(Vec::new());
 115                 monitor.write(&mut ser).unwrap();
 116                 if let Some(_) = self.latest_monitors.lock().unwrap().insert(funding_txo, (monitor.get_latest_update_id(), ser.0)) {
 117                         panic!("Already had monitor pre-watch_channel");
 118                 }
 119                 self.should_update_manager.store(true, atomic::Ordering::Relaxed);
 120                 assert!(self.chain_monitor.watch_channel(funding_txo, monitor).is_ok());
 121                 self.update_ret.lock().unwrap().clone()
 122         }
 123
 124         fn update_channel(&self, funding_txo: OutPoint, update: channelmonitor::ChannelMonitorUpdate) -> Result<(), channelmonitor::ChannelMonitorUpdateErr> {
 125                 let mut map_lock = self.latest_monitors.lock().unwrap();
 126                 let mut map_entry = match map_lock.entry(funding_txo) {
 127                         hash_map::Entry::Occupied(entry) => entry,
 128                         hash_map::Entry::Vacant(_) => panic!("Didn't have monitor on update call"),
 129                 };
 130                 let deserialized_monitor = <(BlockHash, channelmonitor::ChannelMonitor<EnforcingSigner>)>::
 131                         read(&mut Cursor::new(&map_entry.get().1), &OnlyReadsKeysInterface {}).unwrap().1;
 132                 deserialized_monitor.update_monitor(&update, &&TestBroadcaster{}, &&FuzzEstimator{}, &self.logger).unwrap();
 133                 let mut ser = VecWriter(Vec::new());
 134                 deserialized_monitor.write(&mut ser).unwrap();
 135                 map_entry.insert((update.update_id, ser.0));
 136                 self.should_update_manager.store(true, atomic::Ordering::Relaxed);
 137                 self.update_ret.lock().unwrap().clone()
 138         }
 139
 140         fn release_pending_monitor_events(&self) -> Vec<MonitorEvent> {
 141                 return self.chain_monitor.release_pending_monitor_events();
 142         }
 143 }
 144
 145 struct KeyProvider {
 146         node_id: u8,
 147         rand_bytes_id: atomic::AtomicU8,
 148         revoked_commitments: Mutex<HashMap<[u8;32], Arc<Mutex<u64>>>>,
 149 }
 150 impl KeysInterface for KeyProvider {
 151         type Signer = EnforcingSigner;
 152
 153         fn get_node_secret(&self) -> SecretKey {
 154                 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()
 155         }
 156
 157         fn get_destination_script(&self) -> Script {
 158                 let secp_ctx = Secp256k1::signing_only();
 159                 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();
 160                 let our_channel_monitor_claim_key_hash = WPubkeyHash::hash(&PublicKey::from_secret_key(&secp_ctx, &channel_monitor_claim_key).serialize());
 161                 Builder::new().push_opcode(opcodes::all::OP_PUSHBYTES_0).push_slice(&our_channel_monitor_claim_key_hash[..]).into_script()
 162         }
 163
 164         fn get_shutdown_pubkey(&self) -> PublicKey {
 165                 let secp_ctx = Secp256k1::signing_only();
 166                 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())
 167         }
 168
 169         fn get_channel_signer(&self, _inbound: bool, channel_value_satoshis: u64) -> EnforcingSigner {
 170                 let secp_ctx = Secp256k1::signing_only();
 171                 let id = self.rand_bytes_id.fetch_add(1, atomic::Ordering::Relaxed);
 172                 let keys = InMemorySigner::new(
 173                         &secp_ctx,
 174                         SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, self.node_id]).unwrap(),
 175                         SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 5, self.node_id]).unwrap(),
 176                         SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 6, 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, 7, 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, 8, self.node_id]).unwrap(),
 179                         [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],
 180                         channel_value_satoshis,
 181                         [0; 32],
 182                 );
 183                 let revoked_commitment = self.make_revoked_commitment_cell(keys.commitment_seed);
 184                 EnforcingSigner::new_with_revoked(keys, revoked_commitment, false)
 185         }
 186
 187         fn get_secure_random_bytes(&self) -> [u8; 32] {
 188                 let id = self.rand_bytes_id.fetch_add(1, atomic::Ordering::Relaxed);
 189                 [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]
 190         }
 191
 192         fn read_chan_signer(&self, buffer: &[u8]) -> Result<Self::Signer, DecodeError> {
 193                 let mut reader = std::io::Cursor::new(buffer);
 194
 195                 let inner: InMemorySigner = Readable::read(&mut reader)?;
 196                 let revoked_commitment = self.make_revoked_commitment_cell(inner.commitment_seed);
 197
 198                 let last_commitment_number = Readable::read(&mut reader)?;
 199
 200                 Ok(EnforcingSigner {
 201                         inner,
 202                         last_commitment_number: Arc::new(Mutex::new(last_commitment_number)),
 203                         revoked_commitment,
 204                         disable_revocation_policy_check: false,
 205                 })
 206         }
 207 }
 208
 209 impl KeyProvider {
 210         fn make_revoked_commitment_cell(&self, commitment_seed: [u8; 32]) -> Arc<Mutex<u64>> {
 211                 let mut revoked_commitments = self.revoked_commitments.lock().unwrap();
 212                 if !revoked_commitments.contains_key(&commitment_seed) {
 213                         revoked_commitments.insert(commitment_seed, Arc::new(Mutex::new(INITIAL_REVOKED_COMMITMENT_NUMBER)));
 214                 }
 215                 let cell = revoked_commitments.get(&commitment_seed).unwrap();
 216                 Arc::clone(cell)
 217         }
 218 }
 219
 220 #[inline]
 221 fn check_api_err(api_err: APIError) {
 222         match api_err {
 223                 APIError::APIMisuseError { .. } => panic!("We can't misuse the API"),
 224                 APIError::FeeRateTooHigh { .. } => panic!("We can't send too much fee?"),
 225                 APIError::RouteError { .. } => panic!("Our routes should work"),
 226                 APIError::ChannelUnavailable { err } => {
 227                         // Test the error against a list of errors we can hit, and reject
 228                         // all others. If you hit this panic, the list of acceptable errors
 229                         // is probably just stale and you should add new messages here.
 230                         match err.as_str() {
 231                                 "Peer for first hop currently disconnected/pending monitor update!" => {},
 232                                 _ if err.starts_with("Cannot push more than their max accepted HTLCs ") => {},
 233                                 _ if err.starts_with("Cannot send value that would put us over the max HTLC value in flight our peer will accept ") => {},
 234                                 _ if err.starts_with("Cannot send value that would put our balance under counterparty-announced channel reserve value") => {},
 235                                 _ if err.starts_with("Cannot send value that would overdraw remaining funds.") => {},
 236                                 _ if err.starts_with("Cannot send value that would not leave enough to pay for fees.") => {},
 237                                 _ => panic!(err),
 238                         }
 239                 },
 240                 APIError::MonitorUpdateFailed => {
 241                         // We can (obviously) temp-fail a monitor update
 242                 },
 243         }
 244 }
 245 #[inline]
 246 fn check_payment_err(send_err: PaymentSendFailure) {
 247         match send_err {
 248                 PaymentSendFailure::ParameterError(api_err) => check_api_err(api_err),
 249                 PaymentSendFailure::PathParameterError(per_path_results) => {
 250                         for res in per_path_results { if let Err(api_err) = res { check_api_err(api_err); } }
 251                 },
 252                 PaymentSendFailure::AllFailedRetrySafe(per_path_results) => {
 253                         for api_err in per_path_results { check_api_err(api_err); }
 254                 },
 255                 PaymentSendFailure::PartialFailure(per_path_results) => {
 256                         for res in per_path_results { if let Err(api_err) = res { check_api_err(api_err); } }
 257                 },
 258         }
 259 }
 260
 261 type ChanMan = ChannelManager<EnforcingSigner, Arc<TestChainMonitor>, Arc<TestBroadcaster>, Arc<KeyProvider>, Arc<FuzzEstimator>, Arc<dyn Logger>>;
 262
 263 #[inline]
 264 fn send_payment(source: &ChanMan, dest: &ChanMan, dest_chan_id: u64, amt: u64, payment_id: &mut u8) -> bool {
 265         let payment_hash = Sha256::hash(&[*payment_id; 1]);
 266         *payment_id = payment_id.wrapping_add(1);
 267         if let Err(err) = source.send_payment(&Route {
 268                 paths: vec![vec![RouteHop {
 269                         pubkey: dest.get_our_node_id(),
 270                         node_features: NodeFeatures::empty(),
 271                         short_channel_id: dest_chan_id,
 272                         channel_features: ChannelFeatures::empty(),
 273                         fee_msat: amt,
 274                         cltv_expiry_delta: 200,
 275                 }]],
 276         }, PaymentHash(payment_hash.into_inner()), &None) {
 277                 check_payment_err(err);
 278                 false
 279         } else { true }
 280 }
 281 #[inline]
 282 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 {
 283         let payment_hash = Sha256::hash(&[*payment_id; 1]);
 284         *payment_id = payment_id.wrapping_add(1);
 285         if let Err(err) = source.send_payment(&Route {
 286                 paths: vec![vec![RouteHop {
 287                         pubkey: middle.get_our_node_id(),
 288                         node_features: NodeFeatures::empty(),
 289                         short_channel_id: middle_chan_id,
 290                         channel_features: ChannelFeatures::empty(),
 291                         fee_msat: 50000,
 292                         cltv_expiry_delta: 100,
 293                 },RouteHop {
 294                         pubkey: dest.get_our_node_id(),
 295                         node_features: NodeFeatures::empty(),
 296                         short_channel_id: dest_chan_id,
 297                         channel_features: ChannelFeatures::empty(),
 298                         fee_msat: amt,
 299                         cltv_expiry_delta: 200,
 300                 }]],
 301         }, PaymentHash(payment_hash.into_inner()), &None) {
 302                 check_payment_err(err);
 303                 false
 304         } else { true }
 305 }
 306
 307 #[inline]
 308 pub fn do_test<Out: test_logger::Output>(data: &[u8], out: Out) {
 309         let fee_est = Arc::new(FuzzEstimator{});
 310         let broadcast = Arc::new(TestBroadcaster{});
 311
 312         macro_rules! make_node {
 313                 ($node_id: expr) => { {
 314                         let logger: Arc<dyn Logger> = Arc::new(test_logger::TestLogger::new($node_id.to_string(), out.clone()));
 315                         let monitor = Arc::new(TestChainMonitor::new(broadcast.clone(), logger.clone(), fee_est.clone(), Arc::new(TestPersister{})));
 316
 317                         let keys_manager = Arc::new(KeyProvider { node_id: $node_id, rand_bytes_id: atomic::AtomicU8::new(0), revoked_commitments: Mutex::new(HashMap::new()) });
 318                         let mut config = UserConfig::default();
 319                         config.channel_options.fee_proportional_millionths = 0;
 320                         config.channel_options.announced_channel = true;
 321                         config.peer_channel_config_limits.min_dust_limit_satoshis = 0;
 322                         let network = Network::Bitcoin;
 323                         let params = ChainParameters {
 324                                 network,
 325                                 latest_hash: genesis_block(network).block_hash(),
 326                                 latest_height: 0,
 327                         };
 328                         (ChannelManager::new(fee_est.clone(), monitor.clone(), broadcast.clone(), Arc::clone(&logger), keys_manager.clone(), config, params),
 329                         monitor, keys_manager)
 330                 } }
 331         }
 332
 333         macro_rules! reload_node {
 334                 ($ser: expr, $node_id: expr, $old_monitors: expr, $keys_manager: expr) => { {
 335                     let keys_manager = Arc::clone(& $keys_manager);
 336                         let logger: Arc<dyn Logger> = Arc::new(test_logger::TestLogger::new($node_id.to_string(), out.clone()));
 337                         let chain_monitor = Arc::new(TestChainMonitor::new(broadcast.clone(), logger.clone(), fee_est.clone(), Arc::new(TestPersister{})));
 338
 339                         let mut config = UserConfig::default();
 340                         config.channel_options.fee_proportional_millionths = 0;
 341                         config.channel_options.announced_channel = true;
 342                         config.peer_channel_config_limits.min_dust_limit_satoshis = 0;
 343
 344                         let mut monitors = HashMap::new();
 345                         let mut old_monitors = $old_monitors.latest_monitors.lock().unwrap();
 346                         for (outpoint, (update_id, monitor_ser)) in old_monitors.drain() {
 347                                 monitors.insert(outpoint, <(BlockHash, ChannelMonitor<EnforcingSigner>)>::read(&mut Cursor::new(&monitor_ser), &OnlyReadsKeysInterface {}).expect("Failed to read monitor").1);
 348                                 chain_monitor.latest_monitors.lock().unwrap().insert(outpoint, (update_id, monitor_ser));
 349                         }
 350                         let mut monitor_refs = HashMap::new();
 351                         for (outpoint, monitor) in monitors.iter_mut() {
 352                                 monitor_refs.insert(*outpoint, monitor);
 353                         }
 354
 355                         let read_args = ChannelManagerReadArgs {
 356                                 keys_manager,
 357                                 fee_estimator: fee_est.clone(),
 358                                 chain_monitor: chain_monitor.clone(),
 359                                 tx_broadcaster: broadcast.clone(),
 360                                 logger,
 361                                 default_config: config,
 362                                 channel_monitors: monitor_refs,
 363                         };
 364
 365                         (<(BlockHash, ChanMan)>::read(&mut Cursor::new(&$ser.0), read_args).expect("Failed to read manager").1, chain_monitor)
 366                 } }
 367         }
 368
 369         let mut channel_txn = Vec::new();
 370         macro_rules! make_channel {
 371                 ($source: expr, $dest: expr, $chan_id: expr) => { {
 372                         $source.create_channel($dest.get_our_node_id(), 100_000, 42, 0, None).unwrap();
 373                         let open_channel = {
 374                                 let events = $source.get_and_clear_pending_msg_events();
 375                                 assert_eq!(events.len(), 1);
 376                                 if let events::MessageSendEvent::SendOpenChannel { ref msg, .. } = events[0] {
 377                                         msg.clone()
 378                                 } else { panic!("Wrong event type"); }
 379                         };
 380
 381                         $dest.handle_open_channel(&$source.get_our_node_id(), InitFeatures::known(), &open_channel);
 382                         let accept_channel = {
 383                                 let events = $dest.get_and_clear_pending_msg_events();
 384                                 assert_eq!(events.len(), 1);
 385                                 if let events::MessageSendEvent::SendAcceptChannel { ref msg, .. } = events[0] {
 386                                         msg.clone()
 387                                 } else { panic!("Wrong event type"); }
 388                         };
 389
 390                         $source.handle_accept_channel(&$dest.get_our_node_id(), InitFeatures::known(), &accept_channel);
 391                         let funding_output;
 392                         {
 393                                 let events = $source.get_and_clear_pending_events();
 394                                 assert_eq!(events.len(), 1);
 395                                 if let events::Event::FundingGenerationReady { ref temporary_channel_id, ref channel_value_satoshis, ref output_script, .. } = events[0] {
 396                                         let tx = Transaction { version: $chan_id, lock_time: 0, input: Vec::new(), output: vec![TxOut {
 397                                                 value: *channel_value_satoshis, script_pubkey: output_script.clone(),
 398                                         }]};
 399                                         funding_output = OutPoint { txid: tx.txid(), index: 0 };
 400                                         $source.funding_transaction_generated(&temporary_channel_id, funding_output);
 401                                         channel_txn.push(tx);
 402                                 } else { panic!("Wrong event type"); }
 403                         }
 404
 405                         let funding_created = {
 406                                 let events = $source.get_and_clear_pending_msg_events();
 407                                 assert_eq!(events.len(), 1);
 408                                 if let events::MessageSendEvent::SendFundingCreated { ref msg, .. } = events[0] {
 409                                         msg.clone()
 410                                 } else { panic!("Wrong event type"); }
 411                         };
 412                         $dest.handle_funding_created(&$source.get_our_node_id(), &funding_created);
 413
 414                         let funding_signed = {
 415                                 let events = $dest.get_and_clear_pending_msg_events();
 416                                 assert_eq!(events.len(), 1);
 417                                 if let events::MessageSendEvent::SendFundingSigned { ref msg, .. } = events[0] {
 418                                         msg.clone()
 419                                 } else { panic!("Wrong event type"); }
 420                         };
 421                         $source.handle_funding_signed(&$dest.get_our_node_id(), &funding_signed);
 422
 423                         {
 424                                 let events = $source.get_and_clear_pending_events();
 425                                 assert_eq!(events.len(), 1);
 426                                 if let events::Event::FundingBroadcastSafe { .. } = events[0] {
 427                                 } else { panic!("Wrong event type"); }
 428                         }
 429                         funding_output
 430                 } }
 431         }
 432
 433         macro_rules! confirm_txn {
 434                 ($node: expr) => { {
 435                         let mut header = BlockHeader { version: 0x20000000, prev_blockhash: Default::default(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
 436                         let txdata: Vec<_> = channel_txn.iter().enumerate().map(|(i, tx)| (i + 1, tx)).collect();
 437                         $node.block_connected(&header, &txdata, 1);
 438                         for i in 2..100 {
 439                                 header = BlockHeader { version: 0x20000000, prev_blockhash: header.block_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
 440                                 $node.block_connected(&header, &[], i);
 441                         }
 442                 } }
 443         }
 444
 445         macro_rules! lock_fundings {
 446                 ($nodes: expr) => { {
 447                         let mut node_events = Vec::new();
 448                         for node in $nodes.iter() {
 449                                 node_events.push(node.get_and_clear_pending_msg_events());
 450                         }
 451                         for (idx, node_event) in node_events.iter().enumerate() {
 452                                 for event in node_event {
 453                                         if let events::MessageSendEvent::SendFundingLocked { ref node_id, ref msg } = event {
 454                                                 for node in $nodes.iter() {
 455                                                         if node.get_our_node_id() == *node_id {
 456                                                                 node.handle_funding_locked(&$nodes[idx].get_our_node_id(), msg);
 457                                                         }
 458                                                 }
 459                                         } else { panic!("Wrong event type"); }
 460                                 }
 461                         }
 462
 463                         for node in $nodes.iter() {
 464                                 let events = node.get_and_clear_pending_msg_events();
 465                                 for event in events {
 466                                         if let events::MessageSendEvent::SendAnnouncementSignatures { .. } = event {
 467                                         } else { panic!("Wrong event type"); }
 468                                 }
 469                         }
 470                 } }
 471         }
 472
 473         // 3 nodes is enough to hit all the possible cases, notably unknown-source-unknown-dest
 474         // forwarding.
 475         let (node_a, mut monitor_a, keys_manager_a) = make_node!(0);
 476         let (node_b, mut monitor_b, keys_manager_b) = make_node!(1);
 477         let (node_c, mut monitor_c, keys_manager_c) = make_node!(2);
 478
 479         let mut nodes = [node_a, node_b, node_c];
 480
 481         let chan_1_funding = make_channel!(nodes[0], nodes[1], 0);
 482         let chan_2_funding = make_channel!(nodes[1], nodes[2], 1);
 483
 484         for node in nodes.iter() {
 485                 confirm_txn!(node);
 486         }
 487
 488         lock_fundings!(nodes);
 489
 490         let chan_a = nodes[0].list_usable_channels()[0].short_channel_id.unwrap();
 491         let chan_b = nodes[2].list_usable_channels()[0].short_channel_id.unwrap();
 492
 493         let mut payment_id: u8 = 0;
 494
 495         let mut chan_a_disconnected = false;
 496         let mut chan_b_disconnected = false;
 497         let mut ba_events = Vec::new();
 498         let mut bc_events = Vec::new();
 499
 500         let mut node_a_ser = VecWriter(Vec::new());
 501         nodes[0].write(&mut node_a_ser).unwrap();
 502         let mut node_b_ser = VecWriter(Vec::new());
 503         nodes[1].write(&mut node_b_ser).unwrap();
 504         let mut node_c_ser = VecWriter(Vec::new());
 505         nodes[2].write(&mut node_c_ser).unwrap();
 506
 507         macro_rules! test_return {
 508                 () => { {
 509                         assert_eq!(nodes[0].list_channels().len(), 1);
 510                         assert_eq!(nodes[1].list_channels().len(), 2);
 511                         assert_eq!(nodes[2].list_channels().len(), 1);
 512                         return;
 513                 } }
 514         }
 515
 516         let mut read_pos = 0;
 517         macro_rules! get_slice {
 518                 ($len: expr) => {
 519                         {
 520                                 let slice_len = $len as usize;
 521                                 if data.len() < read_pos + slice_len {
 522                                         test_return!();
 523                                 }
 524                                 read_pos += slice_len;
 525                                 &data[read_pos - slice_len..read_pos]
 526                         }
 527                 }
 528         }
 529
 530         loop {
 531                 macro_rules! send_payment_with_secret {
 532                         ($source: expr, $middle: expr, $dest: expr) => { {
 533                                 let payment_hash = Sha256::hash(&[payment_id; 1]);
 534                                 payment_id = payment_id.wrapping_add(1);
 535                                 let payment_secret = Sha256::hash(&[payment_id; 1]);
 536                                 payment_id = payment_id.wrapping_add(1);
 537                                 if let Err(err) = $source.send_payment(&Route {
 538                                         paths: vec![vec![RouteHop {
 539                                                 pubkey: $middle.0.get_our_node_id(),
 540                                                 node_features: NodeFeatures::empty(),
 541                                                 short_channel_id: $middle.1,
 542                                                 channel_features: ChannelFeatures::empty(),
 543                                                 fee_msat: 50_000,
 544                                                 cltv_expiry_delta: 100,
 545                                         },RouteHop {
 546                                                 pubkey: $dest.0.get_our_node_id(),
 547                                                 node_features: NodeFeatures::empty(),
 548                                                 short_channel_id: $dest.1,
 549                                                 channel_features: ChannelFeatures::empty(),
 550                                                 fee_msat: 10_000_000,
 551                                                 cltv_expiry_delta: 200,
 552                                         }],vec![RouteHop {
 553                                                 pubkey: $middle.0.get_our_node_id(),
 554                                                 node_features: NodeFeatures::empty(),
 555                                                 short_channel_id: $middle.1,
 556                                                 channel_features: ChannelFeatures::empty(),
 557                                                 fee_msat: 50_000,
 558                                                 cltv_expiry_delta: 100,
 559                                         },RouteHop {
 560                                                 pubkey: $dest.0.get_our_node_id(),
 561                                                 node_features: NodeFeatures::empty(),
 562                                                 short_channel_id: $dest.1,
 563                                                 channel_features: ChannelFeatures::empty(),
 564                                                 fee_msat: 10_000_000,
 565                                                 cltv_expiry_delta: 200,
 566                                         }]],
 567                                 }, PaymentHash(payment_hash.into_inner()), &Some(PaymentSecret(payment_secret.into_inner()))) {
 568                                         check_payment_err(err);
 569                                 }
 570                         } }
 571                 }
 572
 573                 macro_rules! process_msg_events {
 574                         ($node: expr, $corrupt_forward: expr) => { {
 575                                 let events = if $node == 1 {
 576                                         let mut new_events = Vec::new();
 577                                         mem::swap(&mut new_events, &mut ba_events);
 578                                         new_events.extend_from_slice(&bc_events[..]);
 579                                         bc_events.clear();
 580                                         new_events
 581                                 } else { Vec::new() };
 582                                 let mut had_events = false;
 583                                 for event in events.iter().chain(nodes[$node].get_and_clear_pending_msg_events().iter()) {
 584                                         had_events = true;
 585                                         match event {
 586                                                 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 } } => {
 587                                                         for dest in nodes.iter() {
 588                                                                 if dest.get_our_node_id() == *node_id {
 589                                                                         assert!(update_fee.is_none());
 590                                                                         for update_add in update_add_htlcs {
 591                                                                                 if !$corrupt_forward {
 592                                                                                         dest.handle_update_add_htlc(&nodes[$node].get_our_node_id(), &update_add);
 593                                                                                 } else {
 594                                                                                         // Corrupt the update_add_htlc message so that its HMAC
 595                                                                                         // check will fail and we generate a
 596                                                                                         // update_fail_malformed_htlc instead of an
 597                                                                                         // update_fail_htlc as we do when we reject a payment.
 598                                                                                         let mut msg_ser = update_add.encode();
 599                                                                                         msg_ser[1000] ^= 0xff;
 600                                                                                         let new_msg = UpdateAddHTLC::read(&mut Cursor::new(&msg_ser)).unwrap();
 601                                                                                         dest.handle_update_add_htlc(&nodes[$node].get_our_node_id(), &new_msg);
 602                                                                                 }
 603                                                                         }
 604                                                                         for update_fulfill in update_fulfill_htlcs {
 605                                                                                 dest.handle_update_fulfill_htlc(&nodes[$node].get_our_node_id(), &update_fulfill);
 606                                                                         }
 607                                                                         for update_fail in update_fail_htlcs {
 608                                                                                 dest.handle_update_fail_htlc(&nodes[$node].get_our_node_id(), &update_fail);
 609                                                                         }
 610                                                                         for update_fail_malformed in update_fail_malformed_htlcs {
 611                                                                                 dest.handle_update_fail_malformed_htlc(&nodes[$node].get_our_node_id(), &update_fail_malformed);
 612                                                                         }
 613                                                                         dest.handle_commitment_signed(&nodes[$node].get_our_node_id(), &commitment_signed);
 614                                                                 }
 615                                                         }
 616                                                 },
 617                                                 events::MessageSendEvent::SendRevokeAndACK { ref node_id, ref msg } => {
 618                                                         for dest in nodes.iter() {
 619                                                                 if dest.get_our_node_id() == *node_id {
 620                                                                         dest.handle_revoke_and_ack(&nodes[$node].get_our_node_id(), msg);
 621                                                                 }
 622                                                         }
 623                                                 },
 624                                                 events::MessageSendEvent::SendChannelReestablish { ref node_id, ref msg } => {
 625                                                         for dest in nodes.iter() {
 626                                                                 if dest.get_our_node_id() == *node_id {
 627                                                                         dest.handle_channel_reestablish(&nodes[$node].get_our_node_id(), msg);
 628                                                                 }
 629                                                         }
 630                                                 },
 631                                                 events::MessageSendEvent::SendFundingLocked { .. } => {
 632                                                         // Can be generated as a reestablish response
 633                                                 },
 634                                                 events::MessageSendEvent::PaymentFailureNetworkUpdate { .. } => {
 635                                                         // Can be generated due to a payment forward being rejected due to a
 636                                                         // channel having previously failed a monitor update
 637                                                 },
 638                                                 _ => panic!("Unhandled message event"),
 639                                         }
 640                                 }
 641                                 had_events
 642                         } }
 643                 }
 644
 645                 macro_rules! drain_msg_events_on_disconnect {
 646                         ($counterparty_id: expr) => { {
 647                                 if $counterparty_id == 0 {
 648                                         for event in nodes[0].get_and_clear_pending_msg_events() {
 649                                                 match event {
 650                                                         events::MessageSendEvent::UpdateHTLCs { .. } => {},
 651                                                         events::MessageSendEvent::SendRevokeAndACK { .. } => {},
 652                                                         events::MessageSendEvent::SendChannelReestablish { .. } => {},
 653                                                         events::MessageSendEvent::SendFundingLocked { .. } => {},
 654                                                         events::MessageSendEvent::PaymentFailureNetworkUpdate { .. } => {},
 655                                                         events::MessageSendEvent::HandleError { action: ErrorAction::IgnoreError, .. } => {},
 656                                                         _ => panic!("Unhandled message event"),
 657                                                 }
 658                                         }
 659                                         ba_events.clear();
 660                                 } else {
 661                                         for event in nodes[2].get_and_clear_pending_msg_events() {
 662                                                 match event {
 663                                                         events::MessageSendEvent::UpdateHTLCs { .. } => {},
 664                                                         events::MessageSendEvent::SendRevokeAndACK { .. } => {},
 665                                                         events::MessageSendEvent::SendChannelReestablish { .. } => {},
 666                                                         events::MessageSendEvent::SendFundingLocked { .. } => {},
 667                                                         events::MessageSendEvent::PaymentFailureNetworkUpdate { .. } => {},
 668                                                         events::MessageSendEvent::HandleError { action: ErrorAction::IgnoreError, .. } => {},
 669                                                         _ => panic!("Unhandled message event"),
 670                                                 }
 671                                         }
 672                                         bc_events.clear();
 673                                 }
 674                                 let mut events = nodes[1].get_and_clear_pending_msg_events();
 675                                 let drop_node_id = if $counterparty_id == 0 { nodes[0].get_our_node_id() } else { nodes[2].get_our_node_id() };
 676                                 let msg_sink = if $counterparty_id == 0 { &mut bc_events } else { &mut ba_events };
 677                                 for event in events.drain(..) {
 678                                         let push = match event {
 679                                                 events::MessageSendEvent::UpdateHTLCs { ref node_id, .. } => {
 680                                                         if *node_id != drop_node_id { true } else { false }
 681                                                 },
 682                                                 events::MessageSendEvent::SendRevokeAndACK { ref node_id, .. } => {
 683                                                         if *node_id != drop_node_id { true } else { false }
 684                                                 },
 685                                                 events::MessageSendEvent::SendChannelReestablish { ref node_id, .. } => {
 686                                                         if *node_id != drop_node_id { true } else { false }
 687                                                 },
 688                                                 events::MessageSendEvent::SendFundingLocked { .. } => false,
 689                                                 events::MessageSendEvent::PaymentFailureNetworkUpdate { .. } => false,
 690                                                 events::MessageSendEvent::HandleError { action: ErrorAction::IgnoreError, .. } => false,
 691                                                 _ => panic!("Unhandled message event"),
 692                                         };
 693                                         if push { msg_sink.push(event); }
 694                                 }
 695                         } }
 696                 }
 697
 698                 macro_rules! process_events {
 699                         ($node: expr, $fail: expr) => { {
 700                                 // In case we get 256 payments we may have a hash collision, resulting in the
 701                                 // second claim/fail call not finding the duplicate-hash HTLC, so we have to
 702                                 // deduplicate the calls here.
 703                                 let mut claim_set = HashSet::new();
 704                                 let mut events = nodes[$node].get_and_clear_pending_events();
 705                                 // Sort events so that PendingHTLCsForwardable get processed last. This avoids a
 706                                 // case where we first process a PendingHTLCsForwardable, then claim/fail on a
 707                                 // PaymentReceived, claiming/failing two HTLCs, but leaving a just-generated
 708                                 // PaymentReceived event for the second HTLC in our pending_events (and breaking
 709                                 // our claim_set deduplication).
 710                                 events.sort_by(|a, b| {
 711                                         if let events::Event::PaymentReceived { .. } = a {
 712                                                 if let events::Event::PendingHTLCsForwardable { .. } = b {
 713                                                         Ordering::Less
 714                                                 } else { Ordering::Equal }
 715                                         } else if let events::Event::PendingHTLCsForwardable { .. } = a {
 716                                                 if let events::Event::PaymentReceived { .. } = b {
 717                                                         Ordering::Greater
 718                                                 } else { Ordering::Equal }
 719                                         } else { Ordering::Equal }
 720                                 });
 721                                 let had_events = !events.is_empty();
 722                                 for event in events.drain(..) {
 723                                         match event {
 724                                                 events::Event::PaymentReceived { payment_hash, payment_secret, amt } => {
 725                                                         if claim_set.insert(payment_hash.0) {
 726                                                                 if $fail {
 727                                                                         assert!(nodes[$node].fail_htlc_backwards(&payment_hash, &payment_secret));
 728                                                                 } else {
 729                                                                         assert!(nodes[$node].claim_funds(PaymentPreimage(payment_hash.0), &payment_secret, amt));
 730                                                                 }
 731                                                         }
 732                                                 },
 733                                                 events::Event::PaymentSent { .. } => {},
 734                                                 events::Event::PaymentFailed { .. } => {},
 735                                                 events::Event::PendingHTLCsForwardable { .. } => {
 736                                                         nodes[$node].process_pending_htlc_forwards();
 737                                                 },
 738                                                 _ => panic!("Unhandled event"),
 739                                         }
 740                                 }
 741                                 had_events
 742                         } }
 743                 }
 744
 745                 match get_slice!(1)[0] {
 746                         // In general, we keep related message groups close together in binary form, allowing
 747                         // bit-twiddling mutations to have similar effects. This is probably overkill, but no
 748                         // harm in doing so.
 749
 750                         0x00 => *monitor_a.update_ret.lock().unwrap() = Err(ChannelMonitorUpdateErr::TemporaryFailure),
 751                         0x01 => *monitor_b.update_ret.lock().unwrap() = Err(ChannelMonitorUpdateErr::TemporaryFailure),
 752                         0x02 => *monitor_c.update_ret.lock().unwrap() = Err(ChannelMonitorUpdateErr::TemporaryFailure),
 753                         0x04 => *monitor_a.update_ret.lock().unwrap() = Ok(()),
 754                         0x05 => *monitor_b.update_ret.lock().unwrap() = Ok(()),
 755                         0x06 => *monitor_c.update_ret.lock().unwrap() = Ok(()),
 756
 757                         0x08 => {
 758                                 if let Some((id, _)) = monitor_a.latest_monitors.lock().unwrap().get(&chan_1_funding) {
 759                                         nodes[0].channel_monitor_updated(&chan_1_funding, *id);
 760                                 }
 761                         },
 762                         0x09 => {
 763                                 if let Some((id, _)) = monitor_b.latest_monitors.lock().unwrap().get(&chan_1_funding) {
 764                                         nodes[1].channel_monitor_updated(&chan_1_funding, *id);
 765                                 }
 766                         },
 767                         0x0a => {
 768                                 if let Some((id, _)) = monitor_b.latest_monitors.lock().unwrap().get(&chan_2_funding) {
 769                                         nodes[1].channel_monitor_updated(&chan_2_funding, *id);
 770                                 }
 771                         },
 772                         0x0b => {
 773                                 if let Some((id, _)) = monitor_c.latest_monitors.lock().unwrap().get(&chan_2_funding) {
 774                                         nodes[2].channel_monitor_updated(&chan_2_funding, *id);
 775                                 }
 776                         },
 777
 778                         0x0c => {
 779                                 if !chan_a_disconnected {
 780                                         nodes[0].peer_disconnected(&nodes[1].get_our_node_id(), false);
 781                                         nodes[1].peer_disconnected(&nodes[0].get_our_node_id(), false);
 782                                         chan_a_disconnected = true;
 783                                         drain_msg_events_on_disconnect!(0);
 784                                 }
 785                         },
 786                         0x0d => {
 787                                 if !chan_b_disconnected {
 788                                         nodes[1].peer_disconnected(&nodes[2].get_our_node_id(), false);
 789                                         nodes[2].peer_disconnected(&nodes[1].get_our_node_id(), false);
 790                                         chan_b_disconnected = true;
 791                                         drain_msg_events_on_disconnect!(2);
 792                                 }
 793                         },
 794                         0x0e => {
 795                                 if chan_a_disconnected {
 796                                         nodes[0].peer_connected(&nodes[1].get_our_node_id(), &Init { features: InitFeatures::empty() });
 797                                         nodes[1].peer_connected(&nodes[0].get_our_node_id(), &Init { features: InitFeatures::empty() });
 798                                         chan_a_disconnected = false;
 799                                 }
 800                         },
 801                         0x0f => {
 802                                 if chan_b_disconnected {
 803                                         nodes[1].peer_connected(&nodes[2].get_our_node_id(), &Init { features: InitFeatures::empty() });
 804                                         nodes[2].peer_connected(&nodes[1].get_our_node_id(), &Init { features: InitFeatures::empty() });
 805                                         chan_b_disconnected = false;
 806                                 }
 807                         },
 808
 809                         0x10 => { process_msg_events!(0, true); },
 810                         0x11 => { process_msg_events!(0, false); },
 811                         0x12 => { process_events!(0, true); },
 812                         0x13 => { process_events!(0, false); },
 813                         0x14 => { process_msg_events!(1, true); },
 814                         0x15 => { process_msg_events!(1, false); },
 815                         0x16 => { process_events!(1, true); },
 816                         0x17 => { process_events!(1, false); },
 817                         0x18 => { process_msg_events!(2, true); },
 818                         0x19 => { process_msg_events!(2, false); },
 819                         0x1a => { process_events!(2, true); },
 820                         0x1b => { process_events!(2, false); },
 821
 822                         0x1c => {
 823                                 if !chan_a_disconnected {
 824                                         nodes[1].peer_disconnected(&nodes[0].get_our_node_id(), false);
 825                                         chan_a_disconnected = true;
 826                                         drain_msg_events_on_disconnect!(0);
 827                                 }
 828                                 let (new_node_a, new_monitor_a) = reload_node!(node_a_ser, 0, monitor_a, keys_manager_a);
 829                                 nodes[0] = new_node_a;
 830                                 monitor_a = new_monitor_a;
 831                         },
 832                         0x1d => {
 833                                 if !chan_a_disconnected {
 834                                         nodes[0].peer_disconnected(&nodes[1].get_our_node_id(), false);
 835                                         chan_a_disconnected = true;
 836                                         nodes[0].get_and_clear_pending_msg_events();
 837                                         ba_events.clear();
 838                                 }
 839                                 if !chan_b_disconnected {
 840                                         nodes[2].peer_disconnected(&nodes[1].get_our_node_id(), false);
 841                                         chan_b_disconnected = true;
 842                                         nodes[2].get_and_clear_pending_msg_events();
 843                                         bc_events.clear();
 844                                 }
 845                                 let (new_node_b, new_monitor_b) = reload_node!(node_b_ser, 1, monitor_b, keys_manager_b);
 846                                 nodes[1] = new_node_b;
 847                                 monitor_b = new_monitor_b;
 848                         },
 849                         0x1e => {
 850                                 if !chan_b_disconnected {
 851                                         nodes[1].peer_disconnected(&nodes[2].get_our_node_id(), false);
 852                                         chan_b_disconnected = true;
 853                                         drain_msg_events_on_disconnect!(2);
 854                                 }
 855                                 let (new_node_c, new_monitor_c) = reload_node!(node_c_ser, 2, monitor_c, keys_manager_c);
 856                                 nodes[2] = new_node_c;
 857                                 monitor_c = new_monitor_c;
 858                         },
 859
 860                         // 1/10th the channel size:
 861                         0x20 => { send_payment(&nodes[0], &nodes[1], chan_a, 10_000_000, &mut payment_id); },
 862                         0x21 => { send_payment(&nodes[1], &nodes[0], chan_a, 10_000_000, &mut payment_id); },
 863                         0x22 => { send_payment(&nodes[1], &nodes[2], chan_b, 10_000_000, &mut payment_id); },
 864                         0x23 => { send_payment(&nodes[2], &nodes[1], chan_b, 10_000_000, &mut payment_id); },
 865                         0x24 => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 10_000_000, &mut payment_id); },
 866                         0x25 => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 10_000_000, &mut payment_id); },
 867
 868                         0x26 => { send_payment_with_secret!(nodes[0], (&nodes[1], chan_a), (&nodes[2], chan_b)); },
 869                         0x27 => { send_payment_with_secret!(nodes[2], (&nodes[1], chan_b), (&nodes[0], chan_a)); },
 870
 871                         0x28 => { send_payment(&nodes[0], &nodes[1], chan_a, 1_000_000, &mut payment_id); },
 872                         0x29 => { send_payment(&nodes[1], &nodes[0], chan_a, 1_000_000, &mut payment_id); },
 873                         0x2a => { send_payment(&nodes[1], &nodes[2], chan_b, 1_000_000, &mut payment_id); },
 874                         0x2b => { send_payment(&nodes[2], &nodes[1], chan_b, 1_000_000, &mut payment_id); },
 875                         0x2c => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 1_000_000, &mut payment_id); },
 876                         0x2d => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 1_000_000, &mut payment_id); },
 877
 878                         0x30 => { send_payment(&nodes[0], &nodes[1], chan_a, 100_000, &mut payment_id); },
 879                         0x31 => { send_payment(&nodes[1], &nodes[0], chan_a, 100_000, &mut payment_id); },
 880                         0x32 => { send_payment(&nodes[1], &nodes[2], chan_b, 100_000, &mut payment_id); },
 881                         0x33 => { send_payment(&nodes[2], &nodes[1], chan_b, 100_000, &mut payment_id); },
 882                         0x34 => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 100_000, &mut payment_id); },
 883                         0x35 => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 100_000, &mut payment_id); },
 884
 885                         0x38 => { send_payment(&nodes[0], &nodes[1], chan_a, 10_000, &mut payment_id); },
 886                         0x39 => { send_payment(&nodes[1], &nodes[0], chan_a, 10_000, &mut payment_id); },
 887                         0x3a => { send_payment(&nodes[1], &nodes[2], chan_b, 10_000, &mut payment_id); },
 888                         0x3b => { send_payment(&nodes[2], &nodes[1], chan_b, 10_000, &mut payment_id); },
 889                         0x3c => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 10_000, &mut payment_id); },
 890                         0x3d => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 10_000, &mut payment_id); },
 891
 892                         0x40 => { send_payment(&nodes[0], &nodes[1], chan_a, 1_000, &mut payment_id); },
 893                         0x41 => { send_payment(&nodes[1], &nodes[0], chan_a, 1_000, &mut payment_id); },
 894                         0x42 => { send_payment(&nodes[1], &nodes[2], chan_b, 1_000, &mut payment_id); },
 895                         0x43 => { send_payment(&nodes[2], &nodes[1], chan_b, 1_000, &mut payment_id); },
 896                         0x44 => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 1_000, &mut payment_id); },
 897                         0x45 => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 1_000, &mut payment_id); },
 898
 899                         0x48 => { send_payment(&nodes[0], &nodes[1], chan_a, 100, &mut payment_id); },
 900                         0x49 => { send_payment(&nodes[1], &nodes[0], chan_a, 100, &mut payment_id); },
 901                         0x4a => { send_payment(&nodes[1], &nodes[2], chan_b, 100, &mut payment_id); },
 902                         0x4b => { send_payment(&nodes[2], &nodes[1], chan_b, 100, &mut payment_id); },
 903                         0x4c => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 100, &mut payment_id); },
 904                         0x4d => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 100, &mut payment_id); },
 905
 906                         0x50 => { send_payment(&nodes[0], &nodes[1], chan_a, 10, &mut payment_id); },
 907                         0x51 => { send_payment(&nodes[1], &nodes[0], chan_a, 10, &mut payment_id); },
 908                         0x52 => { send_payment(&nodes[1], &nodes[2], chan_b, 10, &mut payment_id); },
 909                         0x53 => { send_payment(&nodes[2], &nodes[1], chan_b, 10, &mut payment_id); },
 910                         0x54 => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 10, &mut payment_id); },
 911                         0x55 => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 10, &mut payment_id); },
 912
 913                         0x58 => { send_payment(&nodes[0], &nodes[1], chan_a, 1, &mut payment_id); },
 914                         0x59 => { send_payment(&nodes[1], &nodes[0], chan_a, 1, &mut payment_id); },
 915                         0x5a => { send_payment(&nodes[1], &nodes[2], chan_b, 1, &mut payment_id); },
 916                         0x5b => { send_payment(&nodes[2], &nodes[1], chan_b, 1, &mut payment_id); },
 917                         0x5c => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 1, &mut payment_id); },
 918                         0x5d => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 1, &mut payment_id); },
 919
 920                         0xff => {
 921                                 // Test that no channel is in a stuck state where neither party can send funds even
 922                                 // after we resolve all pending events.
 923                                 // First make sure there are no pending monitor updates, resetting the error state
 924                                 // and calling channel_monitor_updated for each monitor.
 925                                 *monitor_a.update_ret.lock().unwrap() = Ok(());
 926                                 *monitor_b.update_ret.lock().unwrap() = Ok(());
 927                                 *monitor_c.update_ret.lock().unwrap() = Ok(());
 928
 929                                 if let Some((id, _)) = monitor_a.latest_monitors.lock().unwrap().get(&chan_1_funding) {
 930                                         nodes[0].channel_monitor_updated(&chan_1_funding, *id);
 931                                 }
 932                                 if let Some((id, _)) = monitor_b.latest_monitors.lock().unwrap().get(&chan_1_funding) {
 933                                         nodes[1].channel_monitor_updated(&chan_1_funding, *id);
 934                                 }
 935                                 if let Some((id, _)) = monitor_b.latest_monitors.lock().unwrap().get(&chan_2_funding) {
 936                                         nodes[1].channel_monitor_updated(&chan_2_funding, *id);
 937                                 }
 938                                 if let Some((id, _)) = monitor_c.latest_monitors.lock().unwrap().get(&chan_2_funding) {
 939                                         nodes[2].channel_monitor_updated(&chan_2_funding, *id);
 940                                 }
 941
 942                                 // Next, make sure peers are all connected to each other
 943                                 if chan_a_disconnected {
 944                                         nodes[0].peer_connected(&nodes[1].get_our_node_id(), &Init { features: InitFeatures::empty() });
 945                                         nodes[1].peer_connected(&nodes[0].get_our_node_id(), &Init { features: InitFeatures::empty() });
 946                                         chan_a_disconnected = false;
 947                                 }
 948                                 if chan_b_disconnected {
 949                                         nodes[1].peer_connected(&nodes[2].get_our_node_id(), &Init { features: InitFeatures::empty() });
 950                                         nodes[2].peer_connected(&nodes[1].get_our_node_id(), &Init { features: InitFeatures::empty() });
 951                                         chan_b_disconnected = false;
 952                                 }
 953
 954                                 for i in 0..std::usize::MAX {
 955                                         if i == 100 { panic!("It may take may iterations to settle the state, but it should not take forever"); }
 956                                         // Then, make sure any current forwards make their way to their destination
 957                                         if process_msg_events!(0, false) { continue; }
 958                                         if process_msg_events!(1, false) { continue; }
 959                                         if process_msg_events!(2, false) { continue; }
 960                                         // ...making sure any pending PendingHTLCsForwardable events are handled and
 961                                         // payments claimed.
 962                                         if process_events!(0, false) { continue; }
 963                                         if process_events!(1, false) { continue; }
 964                                         if process_events!(2, false) { continue; }
 965                                         break;
 966                                 }
 967
 968                                 // Finally, make sure that at least one end of each channel can make a substantial payment.
 969                                 assert!(
 970                                         send_payment(&nodes[0], &nodes[1], chan_a, 10_000_000, &mut payment_id) ||
 971                                         send_payment(&nodes[1], &nodes[0], chan_a, 10_000_000, &mut payment_id));
 972                                 assert!(
 973                                         send_payment(&nodes[1], &nodes[2], chan_b, 10_000_000, &mut payment_id) ||
 974                                         send_payment(&nodes[2], &nodes[1], chan_b, 10_000_000, &mut payment_id));
 975                         },
 976                         _ => test_return!(),
 977                 }
 978
 979                 node_a_ser.0.clear();
 980                 nodes[0].write(&mut node_a_ser).unwrap();
 981                 monitor_a.should_update_manager.store(false, atomic::Ordering::Relaxed);
 982                 node_b_ser.0.clear();
 983                 nodes[1].write(&mut node_b_ser).unwrap();
 984                 monitor_b.should_update_manager.store(false, atomic::Ordering::Relaxed);
 985                 node_c_ser.0.clear();
 986                 nodes[2].write(&mut node_c_ser).unwrap();
 987                 monitor_c.should_update_manager.store(false, atomic::Ordering::Relaxed);
 988         }
 989 }
 990
 991 pub fn chanmon_consistency_test<Out: test_logger::Output>(data: &[u8], out: Out) {
 992         do_test(data, out);
 993 }
 994
 995 #[no_mangle]
 996 pub extern "C" fn chanmon_consistency_run(data: *const u8, datalen: usize) {
 997         do_test(unsafe { std::slice::from_raw_parts(data, datalen) }, test_logger::DevNull{});
 998 }