_ Git - rust-lightning/blob - fuzz/src/chanmon_consistency.rs

   1 // This file is Copyright its original authors, visible in version control
   2 // history.
   3 //
   4 // This file is licensed under the Apache License, Version 2.0 <LICENSE-APACHE
   5 // or http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   6 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your option.
   7 // You may not use this file except in accordance with one or both of these
   8 // licenses.
   9
  10 //! Test that monitor update failures don't get our channel state out of sync.
  11 //! One of the biggest concern with the monitor update failure handling code is that messages
  12 //! resent after monitor updating is restored are delivered out-of-order, resulting in
  13 //! commitment_signed messages having "invalid signatures".
  14 //! To test this we stand up a network of three nodes and read bytes from the fuzz input to denote
  15 //! actions such as sending payments, handling events, or changing monitor update return values on
  16 //! a per-node basis. This should allow it to find any cases where the ordering of actions results
  17 //! in us getting out of sync with ourselves, and, assuming at least one of our recieve- or
  18 //! send-side handling is correct, other peers. We consider it a failure if any action results in a
  19 //! channel being force-closed.
  20
  21 use bitcoin::blockdata::block::BlockHeader;
  22 use bitcoin::blockdata::transaction::{Transaction, TxOut};
  23 use bitcoin::blockdata::script::{Builder, Script};
  24 use bitcoin::blockdata::opcodes;
  25 use bitcoin::network::constants::Network;
  26
  27 use bitcoin::hashes::Hash as TraitImport;
  28 use bitcoin::hashes::sha256::Hash as Sha256;
  29 use bitcoin::hash_types::{BlockHash, WPubkeyHash};
  30
  31 use lightning::chain;
  32 use lightning::chain::chainmonitor;
  33 use lightning::chain::channelmonitor;
  34 use lightning::chain::channelmonitor::{ChannelMonitor, ChannelMonitorUpdateErr, MonitorEvent};
  35 use lightning::chain::transaction::OutPoint;
  36 use lightning::chain::chaininterface::{BroadcasterInterface, ConfirmationTarget, FeeEstimator};
  37 use lightning::chain::keysinterface::{KeysInterface, InMemoryChannelKeys};
  38 use lightning::ln::channelmanager::{ChannelManager, PaymentHash, PaymentPreimage, PaymentSecret, PaymentSendFailure, ChannelManagerReadArgs};
  39 use lightning::ln::features::{ChannelFeatures, InitFeatures, NodeFeatures};
  40 use lightning::ln::msgs::{CommitmentUpdate, ChannelMessageHandler, ErrorAction, UpdateAddHTLC, Init};
  41 use lightning::util::enforcing_trait_impls::EnforcingChannelKeys;
  42 use lightning::util::errors::APIError;
  43 use lightning::util::events;
  44 use lightning::util::logger::Logger;
  45 use lightning::util::config::UserConfig;
  46 use lightning::util::events::{EventsProvider, MessageSendEventsProvider};
  47 use lightning::util::ser::{Readable, ReadableArgs, Writeable, Writer};
  48 use lightning::routing::router::{Route, RouteHop};
  49
  50
  51 use utils::test_logger;
  52 use utils::test_persister::TestPersister;
  53
  54 use bitcoin::secp256k1::key::{PublicKey,SecretKey};
  55 use bitcoin::secp256k1::Secp256k1;
  56
  57 use std::mem;
  58 use std::cmp::Ordering;
  59 use std::collections::{HashSet, hash_map, HashMap};
  60 use std::sync::{Arc,Mutex};
  61 use std::sync::atomic;
  62 use std::io::Cursor;
  63
  64 struct FuzzEstimator {}
  65 impl FeeEstimator for FuzzEstimator {
  66         fn get_est_sat_per_1000_weight(&self, _: ConfirmationTarget) -> u32 {
  67                 253
  68         }
  69 }
  70
  71 pub struct TestBroadcaster {}
  72 impl BroadcasterInterface for TestBroadcaster {
  73         fn broadcast_transaction(&self, _tx: &Transaction) { }
  74 }
  75
  76 pub struct VecWriter(pub Vec<u8>);
  77 impl Writer for VecWriter {
  78         fn write_all(&mut self, buf: &[u8]) -> Result<(), ::std::io::Error> {
  79                 self.0.extend_from_slice(buf);
  80                 Ok(())
  81         }
  82         fn size_hint(&mut self, size: usize) {
  83                 self.0.reserve_exact(size);
  84         }
  85 }
  86
  87 struct TestChainMonitor {
  88         pub logger: Arc<dyn Logger>,
  89         pub chain_monitor: Arc<chainmonitor::ChainMonitor<EnforcingChannelKeys, Arc<dyn chain::Filter>, Arc<TestBroadcaster>, Arc<FuzzEstimator>, Arc<dyn Logger>, Arc<TestPersister>>>,
  90         pub update_ret: Mutex<Result<(), channelmonitor::ChannelMonitorUpdateErr>>,
  91         // If we reload a node with an old copy of ChannelMonitors, the ChannelManager deserialization
  92         // logic will automatically force-close our channels for us (as we don't have an up-to-date
  93         // monitor implying we are not able to punish misbehaving counterparties). Because this test
  94         // "fails" if we ever force-close a channel, we avoid doing so, always saving the latest
  95         // fully-serialized monitor state here, as well as the corresponding update_id.
  96         pub latest_monitors: Mutex<HashMap<OutPoint, (u64, Vec<u8>)>>,
  97         pub should_update_manager: atomic::AtomicBool,
  98 }
  99 impl TestChainMonitor {
 100         pub fn new(broadcaster: Arc<TestBroadcaster>, logger: Arc<dyn Logger>, feeest: Arc<FuzzEstimator>, persister: Arc<TestPersister>) -> Self {
 101                 Self {
 102                         chain_monitor: Arc::new(chainmonitor::ChainMonitor::new(None, broadcaster, logger.clone(), feeest, persister)),
 103                         logger,
 104                         update_ret: Mutex::new(Ok(())),
 105                         latest_monitors: Mutex::new(HashMap::new()),
 106                         should_update_manager: atomic::AtomicBool::new(false),
 107                 }
 108         }
 109 }
 110 impl chain::Watch for TestChainMonitor {
 111         type Keys = EnforcingChannelKeys;
 112
 113         fn watch_channel(&self, funding_txo: OutPoint, monitor: channelmonitor::ChannelMonitor<EnforcingChannelKeys>) -> Result<(), channelmonitor::ChannelMonitorUpdateErr> {
 114                 let mut ser = VecWriter(Vec::new());
 115                 monitor.serialize_for_disk(&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 mut deserialized_monitor = <(BlockHash, channelmonitor::ChannelMonitor<EnforcingChannelKeys>)>::
 131                         read(&mut Cursor::new(&map_entry.get().1)).unwrap().1;
 132                 deserialized_monitor.update_monitor(&update, &&TestBroadcaster{}, &&FuzzEstimator{}, &self.logger).unwrap();
 133                 let mut ser = VecWriter(Vec::new());
 134                 deserialized_monitor.serialize_for_disk(&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 }
 149 impl KeysInterface for KeyProvider {
 150         type ChanKeySigner = EnforcingChannelKeys;
 151
 152         fn get_node_secret(&self) -> SecretKey {
 153                 SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, self.node_id]).unwrap()
 154         }
 155
 156         fn get_destination_script(&self) -> Script {
 157                 let secp_ctx = Secp256k1::signing_only();
 158                 let channel_monitor_claim_key = SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, self.node_id]).unwrap();
 159                 let our_channel_monitor_claim_key_hash = WPubkeyHash::hash(&PublicKey::from_secret_key(&secp_ctx, &channel_monitor_claim_key).serialize());
 160                 Builder::new().push_opcode(opcodes::all::OP_PUSHBYTES_0).push_slice(&our_channel_monitor_claim_key_hash[..]).into_script()
 161         }
 162
 163         fn get_shutdown_pubkey(&self) -> PublicKey {
 164                 let secp_ctx = Secp256k1::signing_only();
 165                 PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, self.node_id]).unwrap())
 166         }
 167
 168         fn get_channel_keys(&self, _inbound: bool, channel_value_satoshis: u64) -> EnforcingChannelKeys {
 169                 let secp_ctx = Secp256k1::signing_only();
 170                 EnforcingChannelKeys::new(InMemoryChannelKeys::new(
 171                         &secp_ctx,
 172                         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(),
 173                         SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 5, self.node_id]).unwrap(),
 174                         SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 6, 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, 7, 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, 8, self.node_id]).unwrap(),
 177                         [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, 9, self.node_id],
 178                         channel_value_satoshis,
 179                         (0, 0),
 180                 ))
 181         }
 182
 183         fn get_secure_random_bytes(&self) -> [u8; 32] {
 184                 let id = self.rand_bytes_id.fetch_add(1, atomic::Ordering::Relaxed);
 185                 [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]
 186         }
 187 }
 188
 189 #[inline]
 190 fn check_api_err(api_err: APIError) {
 191         match api_err {
 192                 APIError::APIMisuseError { .. } => panic!("We can't misuse the API"),
 193                 APIError::FeeRateTooHigh { .. } => panic!("We can't send too much fee?"),
 194                 APIError::RouteError { .. } => panic!("Our routes should work"),
 195                 APIError::ChannelUnavailable { err } => {
 196                         // Test the error against a list of errors we can hit, and reject
 197                         // all others. If you hit this panic, the list of acceptable errors
 198                         // is probably just stale and you should add new messages here.
 199                         match err.as_str() {
 200                                 "Peer for first hop currently disconnected/pending monitor update!" => {},
 201                                 _ if err.starts_with("Cannot push more than their max accepted HTLCs ") => {},
 202                                 _ if err.starts_with("Cannot send value that would put us over the max HTLC value in flight our peer will accept ") => {},
 203                                 _ if err.starts_with("Cannot send value that would put our balance under counterparty-announced channel reserve value") => {},
 204                                 _ if err.starts_with("Cannot send value that would overdraw remaining funds.") => {},
 205                                 _ if err.starts_with("Cannot send value that would not leave enough to pay for fees.") => {},
 206                                 _ => panic!(err),
 207                         }
 208                 },
 209                 APIError::MonitorUpdateFailed => {
 210                         // We can (obviously) temp-fail a monitor update
 211                 },
 212         }
 213 }
 214 #[inline]
 215 fn check_payment_err(send_err: PaymentSendFailure) {
 216         match send_err {
 217                 PaymentSendFailure::ParameterError(api_err) => check_api_err(api_err),
 218                 PaymentSendFailure::PathParameterError(per_path_results) => {
 219                         for res in per_path_results { if let Err(api_err) = res { check_api_err(api_err); } }
 220                 },
 221                 PaymentSendFailure::AllFailedRetrySafe(per_path_results) => {
 222                         for api_err in per_path_results { check_api_err(api_err); }
 223                 },
 224                 PaymentSendFailure::PartialFailure(per_path_results) => {
 225                         for res in per_path_results { if let Err(api_err) = res { check_api_err(api_err); } }
 226                 },
 227         }
 228 }
 229
 230 type ChanMan = ChannelManager<EnforcingChannelKeys, Arc<TestChainMonitor>, Arc<TestBroadcaster>, Arc<KeyProvider>, Arc<FuzzEstimator>, Arc<dyn Logger>>;
 231
 232 #[inline]
 233 fn send_payment(source: &ChanMan, dest: &ChanMan, dest_chan_id: u64, amt: u64, payment_id: &mut u8) -> bool {
 234         let payment_hash = Sha256::hash(&[*payment_id; 1]);
 235         *payment_id = payment_id.wrapping_add(1);
 236         if let Err(err) = source.send_payment(&Route {
 237                 paths: vec![vec![RouteHop {
 238                         pubkey: dest.get_our_node_id(),
 239                         node_features: NodeFeatures::empty(),
 240                         short_channel_id: dest_chan_id,
 241                         channel_features: ChannelFeatures::empty(),
 242                         fee_msat: amt,
 243                         cltv_expiry_delta: 200,
 244                 }]],
 245         }, PaymentHash(payment_hash.into_inner()), &None) {
 246                 check_payment_err(err);
 247                 false
 248         } else { true }
 249 }
 250 #[inline]
 251 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 {
 252         let payment_hash = Sha256::hash(&[*payment_id; 1]);
 253         *payment_id = payment_id.wrapping_add(1);
 254         if let Err(err) = source.send_payment(&Route {
 255                 paths: vec![vec![RouteHop {
 256                         pubkey: middle.get_our_node_id(),
 257                         node_features: NodeFeatures::empty(),
 258                         short_channel_id: middle_chan_id,
 259                         channel_features: ChannelFeatures::empty(),
 260                         fee_msat: 50000,
 261                         cltv_expiry_delta: 100,
 262                 },RouteHop {
 263                         pubkey: dest.get_our_node_id(),
 264                         node_features: NodeFeatures::empty(),
 265                         short_channel_id: dest_chan_id,
 266                         channel_features: ChannelFeatures::empty(),
 267                         fee_msat: amt,
 268                         cltv_expiry_delta: 200,
 269                 }]],
 270         }, PaymentHash(payment_hash.into_inner()), &None) {
 271                 check_payment_err(err);
 272                 false
 273         } else { true }
 274 }
 275
 276 #[inline]
 277 pub fn do_test<Out: test_logger::Output>(data: &[u8], out: Out) {
 278         let fee_est = Arc::new(FuzzEstimator{});
 279         let broadcast = Arc::new(TestBroadcaster{});
 280
 281         macro_rules! make_node {
 282                 ($node_id: expr) => { {
 283                         let logger: Arc<dyn Logger> = Arc::new(test_logger::TestLogger::new($node_id.to_string(), out.clone()));
 284                         let monitor = Arc::new(TestChainMonitor::new(broadcast.clone(), logger.clone(), fee_est.clone(), Arc::new(TestPersister{})));
 285
 286                         let keys_manager = Arc::new(KeyProvider { node_id: $node_id, rand_bytes_id: atomic::AtomicU8::new(0) });
 287                         let mut config = UserConfig::default();
 288                         config.channel_options.fee_proportional_millionths = 0;
 289                         config.channel_options.announced_channel = true;
 290                         config.peer_channel_config_limits.min_dust_limit_satoshis = 0;
 291                         (ChannelManager::new(Network::Bitcoin, fee_est.clone(), monitor.clone(), broadcast.clone(), Arc::clone(&logger), keys_manager.clone(), config, 0),
 292                         monitor)
 293                 } }
 294         }
 295
 296         macro_rules! reload_node {
 297                 ($ser: expr, $node_id: expr, $old_monitors: expr) => { {
 298                         let logger: Arc<dyn Logger> = Arc::new(test_logger::TestLogger::new($node_id.to_string(), out.clone()));
 299                         let chain_monitor = Arc::new(TestChainMonitor::new(broadcast.clone(), logger.clone(), fee_est.clone(), Arc::new(TestPersister{})));
 300
 301                         let keys_manager = Arc::new(KeyProvider { node_id: $node_id, rand_bytes_id: atomic::AtomicU8::new(0) });
 302                         let mut config = UserConfig::default();
 303                         config.channel_options.fee_proportional_millionths = 0;
 304                         config.channel_options.announced_channel = true;
 305                         config.peer_channel_config_limits.min_dust_limit_satoshis = 0;
 306
 307                         let mut monitors = HashMap::new();
 308                         let mut old_monitors = $old_monitors.latest_monitors.lock().unwrap();
 309                         for (outpoint, (update_id, monitor_ser)) in old_monitors.drain() {
 310                                 monitors.insert(outpoint, <(BlockHash, ChannelMonitor<EnforcingChannelKeys>)>::read(&mut Cursor::new(&monitor_ser)).expect("Failed to read monitor").1);
 311                                 chain_monitor.latest_monitors.lock().unwrap().insert(outpoint, (update_id, monitor_ser));
 312                         }
 313                         let mut monitor_refs = HashMap::new();
 314                         for (outpoint, monitor) in monitors.iter_mut() {
 315                                 monitor_refs.insert(*outpoint, monitor);
 316                         }
 317
 318                         let read_args = ChannelManagerReadArgs {
 319                                 keys_manager,
 320                                 fee_estimator: fee_est.clone(),
 321                                 chain_monitor: chain_monitor.clone(),
 322                                 tx_broadcaster: broadcast.clone(),
 323                                 logger,
 324                                 default_config: config,
 325                                 channel_monitors: monitor_refs,
 326                         };
 327
 328                         (<(BlockHash, ChanMan)>::read(&mut Cursor::new(&$ser.0), read_args).expect("Failed to read manager").1, chain_monitor)
 329                 } }
 330         }
 331
 332         let mut channel_txn = Vec::new();
 333         macro_rules! make_channel {
 334                 ($source: expr, $dest: expr, $chan_id: expr) => { {
 335                         $source.create_channel($dest.get_our_node_id(), 100_000, 42, 0, None).unwrap();
 336                         let open_channel = {
 337                                 let events = $source.get_and_clear_pending_msg_events();
 338                                 assert_eq!(events.len(), 1);
 339                                 if let events::MessageSendEvent::SendOpenChannel { ref msg, .. } = events[0] {
 340                                         msg.clone()
 341                                 } else { panic!("Wrong event type"); }
 342                         };
 343
 344                         $dest.handle_open_channel(&$source.get_our_node_id(), InitFeatures::known(), &open_channel);
 345                         let accept_channel = {
 346                                 let events = $dest.get_and_clear_pending_msg_events();
 347                                 assert_eq!(events.len(), 1);
 348                                 if let events::MessageSendEvent::SendAcceptChannel { ref msg, .. } = events[0] {
 349                                         msg.clone()
 350                                 } else { panic!("Wrong event type"); }
 351                         };
 352
 353                         $source.handle_accept_channel(&$dest.get_our_node_id(), InitFeatures::known(), &accept_channel);
 354                         let funding_output;
 355                         {
 356                                 let events = $source.get_and_clear_pending_events();
 357                                 assert_eq!(events.len(), 1);
 358                                 if let events::Event::FundingGenerationReady { ref temporary_channel_id, ref channel_value_satoshis, ref output_script, .. } = events[0] {
 359                                         let tx = Transaction { version: $chan_id, lock_time: 0, input: Vec::new(), output: vec![TxOut {
 360                                                 value: *channel_value_satoshis, script_pubkey: output_script.clone(),
 361                                         }]};
 362                                         funding_output = OutPoint { txid: tx.txid(), index: 0 };
 363                                         $source.funding_transaction_generated(&temporary_channel_id, funding_output);
 364                                         channel_txn.push(tx);
 365                                 } else { panic!("Wrong event type"); }
 366                         }
 367
 368                         let funding_created = {
 369                                 let events = $source.get_and_clear_pending_msg_events();
 370                                 assert_eq!(events.len(), 1);
 371                                 if let events::MessageSendEvent::SendFundingCreated { ref msg, .. } = events[0] {
 372                                         msg.clone()
 373                                 } else { panic!("Wrong event type"); }
 374                         };
 375                         $dest.handle_funding_created(&$source.get_our_node_id(), &funding_created);
 376
 377                         let funding_signed = {
 378                                 let events = $dest.get_and_clear_pending_msg_events();
 379                                 assert_eq!(events.len(), 1);
 380                                 if let events::MessageSendEvent::SendFundingSigned { ref msg, .. } = events[0] {
 381                                         msg.clone()
 382                                 } else { panic!("Wrong event type"); }
 383                         };
 384                         $source.handle_funding_signed(&$dest.get_our_node_id(), &funding_signed);
 385
 386                         {
 387                                 let events = $source.get_and_clear_pending_events();
 388                                 assert_eq!(events.len(), 1);
 389                                 if let events::Event::FundingBroadcastSafe { .. } = events[0] {
 390                                 } else { panic!("Wrong event type"); }
 391                         }
 392                         funding_output
 393                 } }
 394         }
 395
 396         macro_rules! confirm_txn {
 397                 ($node: expr) => { {
 398                         let mut header = BlockHeader { version: 0x20000000, prev_blockhash: Default::default(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
 399                         let txdata: Vec<_> = channel_txn.iter().enumerate().map(|(i, tx)| (i + 1, tx)).collect();
 400                         $node.block_connected(&header, &txdata, 1);
 401                         for i in 2..100 {
 402                                 header = BlockHeader { version: 0x20000000, prev_blockhash: header.block_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
 403                                 $node.block_connected(&header, &[], i);
 404                         }
 405                 } }
 406         }
 407
 408         macro_rules! lock_fundings {
 409                 ($nodes: expr) => { {
 410                         let mut node_events = Vec::new();
 411                         for node in $nodes.iter() {
 412                                 node_events.push(node.get_and_clear_pending_msg_events());
 413                         }
 414                         for (idx, node_event) in node_events.iter().enumerate() {
 415                                 for event in node_event {
 416                                         if let events::MessageSendEvent::SendFundingLocked { ref node_id, ref msg } = event {
 417                                                 for node in $nodes.iter() {
 418                                                         if node.get_our_node_id() == *node_id {
 419                                                                 node.handle_funding_locked(&$nodes[idx].get_our_node_id(), msg);
 420                                                         }
 421                                                 }
 422                                         } else { panic!("Wrong event type"); }
 423                                 }
 424                         }
 425
 426                         for node in $nodes.iter() {
 427                                 let events = node.get_and_clear_pending_msg_events();
 428                                 for event in events {
 429                                         if let events::MessageSendEvent::SendAnnouncementSignatures { .. } = event {
 430                                         } else { panic!("Wrong event type"); }
 431                                 }
 432                         }
 433                 } }
 434         }
 435
 436         // 3 nodes is enough to hit all the possible cases, notably unknown-source-unknown-dest
 437         // forwarding.
 438         let (node_a, mut monitor_a) = make_node!(0);
 439         let (node_b, mut monitor_b) = make_node!(1);
 440         let (node_c, mut monitor_c) = make_node!(2);
 441
 442         let mut nodes = [node_a, node_b, node_c];
 443
 444         let chan_1_funding = make_channel!(nodes[0], nodes[1], 0);
 445         let chan_2_funding = make_channel!(nodes[1], nodes[2], 1);
 446
 447         for node in nodes.iter() {
 448                 confirm_txn!(node);
 449         }
 450
 451         lock_fundings!(nodes);
 452
 453         let chan_a = nodes[0].list_usable_channels()[0].short_channel_id.unwrap();
 454         let chan_b = nodes[2].list_usable_channels()[0].short_channel_id.unwrap();
 455
 456         let mut payment_id: u8 = 0;
 457
 458         let mut chan_a_disconnected = false;
 459         let mut chan_b_disconnected = false;
 460         let mut ba_events = Vec::new();
 461         let mut bc_events = Vec::new();
 462
 463         let mut node_a_ser = VecWriter(Vec::new());
 464         nodes[0].write(&mut node_a_ser).unwrap();
 465         let mut node_b_ser = VecWriter(Vec::new());
 466         nodes[1].write(&mut node_b_ser).unwrap();
 467         let mut node_c_ser = VecWriter(Vec::new());
 468         nodes[2].write(&mut node_c_ser).unwrap();
 469
 470         macro_rules! test_return {
 471                 () => { {
 472                         assert_eq!(nodes[0].list_channels().len(), 1);
 473                         assert_eq!(nodes[1].list_channels().len(), 2);
 474                         assert_eq!(nodes[2].list_channels().len(), 1);
 475                         return;
 476                 } }
 477         }
 478
 479         let mut read_pos = 0;
 480         macro_rules! get_slice {
 481                 ($len: expr) => {
 482                         {
 483                                 let slice_len = $len as usize;
 484                                 if data.len() < read_pos + slice_len {
 485                                         test_return!();
 486                                 }
 487                                 read_pos += slice_len;
 488                                 &data[read_pos - slice_len..read_pos]
 489                         }
 490                 }
 491         }
 492
 493         loop {
 494                 macro_rules! send_payment_with_secret {
 495                         ($source: expr, $middle: expr, $dest: expr) => { {
 496                                 let payment_hash = Sha256::hash(&[payment_id; 1]);
 497                                 payment_id = payment_id.wrapping_add(1);
 498                                 let payment_secret = Sha256::hash(&[payment_id; 1]);
 499                                 payment_id = payment_id.wrapping_add(1);
 500                                 if let Err(err) = $source.send_payment(&Route {
 501                                         paths: vec![vec![RouteHop {
 502                                                 pubkey: $middle.0.get_our_node_id(),
 503                                                 node_features: NodeFeatures::empty(),
 504                                                 short_channel_id: $middle.1,
 505                                                 channel_features: ChannelFeatures::empty(),
 506                                                 fee_msat: 50_000,
 507                                                 cltv_expiry_delta: 100,
 508                                         },RouteHop {
 509                                                 pubkey: $dest.0.get_our_node_id(),
 510                                                 node_features: NodeFeatures::empty(),
 511                                                 short_channel_id: $dest.1,
 512                                                 channel_features: ChannelFeatures::empty(),
 513                                                 fee_msat: 10_000_000,
 514                                                 cltv_expiry_delta: 200,
 515                                         }],vec![RouteHop {
 516                                                 pubkey: $middle.0.get_our_node_id(),
 517                                                 node_features: NodeFeatures::empty(),
 518                                                 short_channel_id: $middle.1,
 519                                                 channel_features: ChannelFeatures::empty(),
 520                                                 fee_msat: 50_000,
 521                                                 cltv_expiry_delta: 100,
 522                                         },RouteHop {
 523                                                 pubkey: $dest.0.get_our_node_id(),
 524                                                 node_features: NodeFeatures::empty(),
 525                                                 short_channel_id: $dest.1,
 526                                                 channel_features: ChannelFeatures::empty(),
 527                                                 fee_msat: 10_000_000,
 528                                                 cltv_expiry_delta: 200,
 529                                         }]],
 530                                 }, PaymentHash(payment_hash.into_inner()), &Some(PaymentSecret(payment_secret.into_inner()))) {
 531                                         check_payment_err(err);
 532                                 }
 533                         } }
 534                 }
 535
 536                 macro_rules! process_msg_events {
 537                         ($node: expr, $corrupt_forward: expr) => { {
 538                                 let events = if $node == 1 {
 539                                         let mut new_events = Vec::new();
 540                                         mem::swap(&mut new_events, &mut ba_events);
 541                                         new_events.extend_from_slice(&bc_events[..]);
 542                                         bc_events.clear();
 543                                         new_events
 544                                 } else { Vec::new() };
 545                                 let mut had_events = false;
 546                                 for event in events.iter().chain(nodes[$node].get_and_clear_pending_msg_events().iter()) {
 547                                         had_events = true;
 548                                         match event {
 549                                                 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 } } => {
 550                                                         for dest in nodes.iter() {
 551                                                                 if dest.get_our_node_id() == *node_id {
 552                                                                         assert!(update_fee.is_none());
 553                                                                         for update_add in update_add_htlcs {
 554                                                                                 if !$corrupt_forward {
 555                                                                                         dest.handle_update_add_htlc(&nodes[$node].get_our_node_id(), &update_add);
 556                                                                                 } else {
 557                                                                                         // Corrupt the update_add_htlc message so that its HMAC
 558                                                                                         // check will fail and we generate a
 559                                                                                         // update_fail_malformed_htlc instead of an
 560                                                                                         // update_fail_htlc as we do when we reject a payment.
 561                                                                                         let mut msg_ser = update_add.encode();
 562                                                                                         msg_ser[1000] ^= 0xff;
 563                                                                                         let new_msg = UpdateAddHTLC::read(&mut Cursor::new(&msg_ser)).unwrap();
 564                                                                                         dest.handle_update_add_htlc(&nodes[$node].get_our_node_id(), &new_msg);
 565                                                                                 }
 566                                                                         }
 567                                                                         for update_fulfill in update_fulfill_htlcs {
 568                                                                                 dest.handle_update_fulfill_htlc(&nodes[$node].get_our_node_id(), &update_fulfill);
 569                                                                         }
 570                                                                         for update_fail in update_fail_htlcs {
 571                                                                                 dest.handle_update_fail_htlc(&nodes[$node].get_our_node_id(), &update_fail);
 572                                                                         }
 573                                                                         for update_fail_malformed in update_fail_malformed_htlcs {
 574                                                                                 dest.handle_update_fail_malformed_htlc(&nodes[$node].get_our_node_id(), &update_fail_malformed);
 575                                                                         }
 576                                                                         dest.handle_commitment_signed(&nodes[$node].get_our_node_id(), &commitment_signed);
 577                                                                 }
 578                                                         }
 579                                                 },
 580                                                 events::MessageSendEvent::SendRevokeAndACK { ref node_id, ref msg } => {
 581                                                         for dest in nodes.iter() {
 582                                                                 if dest.get_our_node_id() == *node_id {
 583                                                                         dest.handle_revoke_and_ack(&nodes[$node].get_our_node_id(), msg);
 584                                                                 }
 585                                                         }
 586                                                 },
 587                                                 events::MessageSendEvent::SendChannelReestablish { ref node_id, ref msg } => {
 588                                                         for dest in nodes.iter() {
 589                                                                 if dest.get_our_node_id() == *node_id {
 590                                                                         dest.handle_channel_reestablish(&nodes[$node].get_our_node_id(), msg);
 591                                                                 }
 592                                                         }
 593                                                 },
 594                                                 events::MessageSendEvent::SendFundingLocked { .. } => {
 595                                                         // Can be generated as a reestablish response
 596                                                 },
 597                                                 events::MessageSendEvent::PaymentFailureNetworkUpdate { .. } => {
 598                                                         // Can be generated due to a payment forward being rejected due to a
 599                                                         // channel having previously failed a monitor update
 600                                                 },
 601                                                 _ => panic!("Unhandled message event"),
 602                                         }
 603                                 }
 604                                 had_events
 605                         } }
 606                 }
 607
 608                 macro_rules! drain_msg_events_on_disconnect {
 609                         ($counterparty_id: expr) => { {
 610                                 if $counterparty_id == 0 {
 611                                         for event in nodes[0].get_and_clear_pending_msg_events() {
 612                                                 match event {
 613                                                         events::MessageSendEvent::UpdateHTLCs { .. } => {},
 614                                                         events::MessageSendEvent::SendRevokeAndACK { .. } => {},
 615                                                         events::MessageSendEvent::SendChannelReestablish { .. } => {},
 616                                                         events::MessageSendEvent::SendFundingLocked { .. } => {},
 617                                                         events::MessageSendEvent::PaymentFailureNetworkUpdate { .. } => {},
 618                                                         events::MessageSendEvent::HandleError { action: ErrorAction::IgnoreError, .. } => {},
 619                                                         _ => panic!("Unhandled message event"),
 620                                                 }
 621                                         }
 622                                         ba_events.clear();
 623                                 } else {
 624                                         for event in nodes[2].get_and_clear_pending_msg_events() {
 625                                                 match event {
 626                                                         events::MessageSendEvent::UpdateHTLCs { .. } => {},
 627                                                         events::MessageSendEvent::SendRevokeAndACK { .. } => {},
 628                                                         events::MessageSendEvent::SendChannelReestablish { .. } => {},
 629                                                         events::MessageSendEvent::SendFundingLocked { .. } => {},
 630                                                         events::MessageSendEvent::PaymentFailureNetworkUpdate { .. } => {},
 631                                                         events::MessageSendEvent::HandleError { action: ErrorAction::IgnoreError, .. } => {},
 632                                                         _ => panic!("Unhandled message event"),
 633                                                 }
 634                                         }
 635                                         bc_events.clear();
 636                                 }
 637                                 let mut events = nodes[1].get_and_clear_pending_msg_events();
 638                                 let drop_node_id = if $counterparty_id == 0 { nodes[0].get_our_node_id() } else { nodes[2].get_our_node_id() };
 639                                 let msg_sink = if $counterparty_id == 0 { &mut bc_events } else { &mut ba_events };
 640                                 for event in events.drain(..) {
 641                                         let push = match event {
 642                                                 events::MessageSendEvent::UpdateHTLCs { ref node_id, .. } => {
 643                                                         if *node_id != drop_node_id { true } else { false }
 644                                                 },
 645                                                 events::MessageSendEvent::SendRevokeAndACK { ref node_id, .. } => {
 646                                                         if *node_id != drop_node_id { true } else { false }
 647                                                 },
 648                                                 events::MessageSendEvent::SendChannelReestablish { ref node_id, .. } => {
 649                                                         if *node_id != drop_node_id { true } else { false }
 650                                                 },
 651                                                 events::MessageSendEvent::SendFundingLocked { .. } => false,
 652                                                 events::MessageSendEvent::PaymentFailureNetworkUpdate { .. } => false,
 653                                                 events::MessageSendEvent::HandleError { action: ErrorAction::IgnoreError, .. } => false,
 654                                                 _ => panic!("Unhandled message event"),
 655                                         };
 656                                         if push { msg_sink.push(event); }
 657                                 }
 658                         } }
 659                 }
 660
 661                 macro_rules! process_events {
 662                         ($node: expr, $fail: expr) => { {
 663                                 // In case we get 256 payments we may have a hash collision, resulting in the
 664                                 // second claim/fail call not finding the duplicate-hash HTLC, so we have to
 665                                 // deduplicate the calls here.
 666                                 let mut claim_set = HashSet::new();
 667                                 let mut events = nodes[$node].get_and_clear_pending_events();
 668                                 // Sort events so that PendingHTLCsForwardable get processed last. This avoids a
 669                                 // case where we first process a PendingHTLCsForwardable, then claim/fail on a
 670                                 // PaymentReceived, claiming/failing two HTLCs, but leaving a just-generated
 671                                 // PaymentReceived event for the second HTLC in our pending_events (and breaking
 672                                 // our claim_set deduplication).
 673                                 events.sort_by(|a, b| {
 674                                         if let events::Event::PaymentReceived { .. } = a {
 675                                                 if let events::Event::PendingHTLCsForwardable { .. } = b {
 676                                                         Ordering::Less
 677                                                 } else { Ordering::Equal }
 678                                         } else if let events::Event::PendingHTLCsForwardable { .. } = a {
 679                                                 if let events::Event::PaymentReceived { .. } = b {
 680                                                         Ordering::Greater
 681                                                 } else { Ordering::Equal }
 682                                         } else { Ordering::Equal }
 683                                 });
 684                                 let had_events = !events.is_empty();
 685                                 for event in events.drain(..) {
 686                                         match event {
 687                                                 events::Event::PaymentReceived { payment_hash, payment_secret, amt } => {
 688                                                         if claim_set.insert(payment_hash.0) {
 689                                                                 if $fail {
 690                                                                         assert!(nodes[$node].fail_htlc_backwards(&payment_hash, &payment_secret));
 691                                                                 } else {
 692                                                                         assert!(nodes[$node].claim_funds(PaymentPreimage(payment_hash.0), &payment_secret, amt));
 693                                                                 }
 694                                                         }
 695                                                 },
 696                                                 events::Event::PaymentSent { .. } => {},
 697                                                 events::Event::PaymentFailed { .. } => {},
 698                                                 events::Event::PendingHTLCsForwardable { .. } => {
 699                                                         nodes[$node].process_pending_htlc_forwards();
 700                                                 },
 701                                                 _ => panic!("Unhandled event"),
 702                                         }
 703                                 }
 704                                 had_events
 705                         } }
 706                 }
 707
 708                 match get_slice!(1)[0] {
 709                         // In general, we keep related message groups close together in binary form, allowing
 710                         // bit-twiddling mutations to have similar effects. This is probably overkill, but no
 711                         // harm in doing so.
 712
 713                         0x00 => *monitor_a.update_ret.lock().unwrap() = Err(ChannelMonitorUpdateErr::TemporaryFailure),
 714                         0x01 => *monitor_b.update_ret.lock().unwrap() = Err(ChannelMonitorUpdateErr::TemporaryFailure),
 715                         0x02 => *monitor_c.update_ret.lock().unwrap() = Err(ChannelMonitorUpdateErr::TemporaryFailure),
 716                         0x04 => *monitor_a.update_ret.lock().unwrap() = Ok(()),
 717                         0x05 => *monitor_b.update_ret.lock().unwrap() = Ok(()),
 718                         0x06 => *monitor_c.update_ret.lock().unwrap() = Ok(()),
 719
 720                         0x08 => {
 721                                 if let Some((id, _)) = monitor_a.latest_monitors.lock().unwrap().get(&chan_1_funding) {
 722                                         nodes[0].channel_monitor_updated(&chan_1_funding, *id);
 723                                 }
 724                         },
 725                         0x09 => {
 726                                 if let Some((id, _)) = monitor_b.latest_monitors.lock().unwrap().get(&chan_1_funding) {
 727                                         nodes[1].channel_monitor_updated(&chan_1_funding, *id);
 728                                 }
 729                         },
 730                         0x0a => {
 731                                 if let Some((id, _)) = monitor_b.latest_monitors.lock().unwrap().get(&chan_2_funding) {
 732                                         nodes[1].channel_monitor_updated(&chan_2_funding, *id);
 733                                 }
 734                         },
 735                         0x0b => {
 736                                 if let Some((id, _)) = monitor_c.latest_monitors.lock().unwrap().get(&chan_2_funding) {
 737                                         nodes[2].channel_monitor_updated(&chan_2_funding, *id);
 738                                 }
 739                         },
 740
 741                         0x0c => {
 742                                 if !chan_a_disconnected {
 743                                         nodes[0].peer_disconnected(&nodes[1].get_our_node_id(), false);
 744                                         nodes[1].peer_disconnected(&nodes[0].get_our_node_id(), false);
 745                                         chan_a_disconnected = true;
 746                                         drain_msg_events_on_disconnect!(0);
 747                                 }
 748                         },
 749                         0x0d => {
 750                                 if !chan_b_disconnected {
 751                                         nodes[1].peer_disconnected(&nodes[2].get_our_node_id(), false);
 752                                         nodes[2].peer_disconnected(&nodes[1].get_our_node_id(), false);
 753                                         chan_b_disconnected = true;
 754                                         drain_msg_events_on_disconnect!(2);
 755                                 }
 756                         },
 757                         0x0e => {
 758                                 if chan_a_disconnected {
 759                                         nodes[0].peer_connected(&nodes[1].get_our_node_id(), &Init { features: InitFeatures::empty() });
 760                                         nodes[1].peer_connected(&nodes[0].get_our_node_id(), &Init { features: InitFeatures::empty() });
 761                                         chan_a_disconnected = false;
 762                                 }
 763                         },
 764                         0x0f => {
 765                                 if chan_b_disconnected {
 766                                         nodes[1].peer_connected(&nodes[2].get_our_node_id(), &Init { features: InitFeatures::empty() });
 767                                         nodes[2].peer_connected(&nodes[1].get_our_node_id(), &Init { features: InitFeatures::empty() });
 768                                         chan_b_disconnected = false;
 769                                 }
 770                         },
 771
 772                         0x10 => { process_msg_events!(0, true); },
 773                         0x11 => { process_msg_events!(0, false); },
 774                         0x12 => { process_events!(0, true); },
 775                         0x13 => { process_events!(0, false); },
 776                         0x14 => { process_msg_events!(1, true); },
 777                         0x15 => { process_msg_events!(1, false); },
 778                         0x16 => { process_events!(1, true); },
 779                         0x17 => { process_events!(1, false); },
 780                         0x18 => { process_msg_events!(2, true); },
 781                         0x19 => { process_msg_events!(2, false); },
 782                         0x1a => { process_events!(2, true); },
 783                         0x1b => { process_events!(2, false); },
 784
 785                         0x1c => {
 786                                 if !chan_a_disconnected {
 787                                         nodes[1].peer_disconnected(&nodes[0].get_our_node_id(), false);
 788                                         chan_a_disconnected = true;
 789                                         drain_msg_events_on_disconnect!(0);
 790                                 }
 791                                 let (new_node_a, new_monitor_a) = reload_node!(node_a_ser, 0, monitor_a);
 792                                 nodes[0] = new_node_a;
 793                                 monitor_a = new_monitor_a;
 794                         },
 795                         0x1d => {
 796                                 if !chan_a_disconnected {
 797                                         nodes[0].peer_disconnected(&nodes[1].get_our_node_id(), false);
 798                                         chan_a_disconnected = true;
 799                                         nodes[0].get_and_clear_pending_msg_events();
 800                                         ba_events.clear();
 801                                 }
 802                                 if !chan_b_disconnected {
 803                                         nodes[2].peer_disconnected(&nodes[1].get_our_node_id(), false);
 804                                         chan_b_disconnected = true;
 805                                         nodes[2].get_and_clear_pending_msg_events();
 806                                         bc_events.clear();
 807                                 }
 808                                 let (new_node_b, new_monitor_b) = reload_node!(node_b_ser, 1, monitor_b);
 809                                 nodes[1] = new_node_b;
 810                                 monitor_b = new_monitor_b;
 811                         },
 812                         0x1e => {
 813                                 if !chan_b_disconnected {
 814                                         nodes[1].peer_disconnected(&nodes[2].get_our_node_id(), false);
 815                                         chan_b_disconnected = true;
 816                                         drain_msg_events_on_disconnect!(2);
 817                                 }
 818                                 let (new_node_c, new_monitor_c) = reload_node!(node_c_ser, 2, monitor_c);
 819                                 nodes[2] = new_node_c;
 820                                 monitor_c = new_monitor_c;
 821                         },
 822
 823                         // 1/10th the channel size:
 824                         0x20 => { send_payment(&nodes[0], &nodes[1], chan_a, 10_000_000, &mut payment_id); },
 825                         0x21 => { send_payment(&nodes[1], &nodes[0], chan_a, 10_000_000, &mut payment_id); },
 826                         0x22 => { send_payment(&nodes[1], &nodes[2], chan_b, 10_000_000, &mut payment_id); },
 827                         0x23 => { send_payment(&nodes[2], &nodes[1], chan_b, 10_000_000, &mut payment_id); },
 828                         0x24 => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 10_000_000, &mut payment_id); },
 829                         0x25 => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 10_000_000, &mut payment_id); },
 830
 831                         0x26 => { send_payment_with_secret!(nodes[0], (&nodes[1], chan_a), (&nodes[2], chan_b)); },
 832                         0x27 => { send_payment_with_secret!(nodes[2], (&nodes[1], chan_b), (&nodes[0], chan_a)); },
 833
 834                         0x28 => { send_payment(&nodes[0], &nodes[1], chan_a, 1_000_000, &mut payment_id); },
 835                         0x29 => { send_payment(&nodes[1], &nodes[0], chan_a, 1_000_000, &mut payment_id); },
 836                         0x2a => { send_payment(&nodes[1], &nodes[2], chan_b, 1_000_000, &mut payment_id); },
 837                         0x2b => { send_payment(&nodes[2], &nodes[1], chan_b, 1_000_000, &mut payment_id); },
 838                         0x2c => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 1_000_000, &mut payment_id); },
 839                         0x2d => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 1_000_000, &mut payment_id); },
 840
 841                         0x30 => { send_payment(&nodes[0], &nodes[1], chan_a, 100_000, &mut payment_id); },
 842                         0x31 => { send_payment(&nodes[1], &nodes[0], chan_a, 100_000, &mut payment_id); },
 843                         0x32 => { send_payment(&nodes[1], &nodes[2], chan_b, 100_000, &mut payment_id); },
 844                         0x33 => { send_payment(&nodes[2], &nodes[1], chan_b, 100_000, &mut payment_id); },
 845                         0x34 => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 100_000, &mut payment_id); },
 846                         0x35 => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 100_000, &mut payment_id); },
 847
 848                         0x38 => { send_payment(&nodes[0], &nodes[1], chan_a, 10_000, &mut payment_id); },
 849                         0x39 => { send_payment(&nodes[1], &nodes[0], chan_a, 10_000, &mut payment_id); },
 850                         0x3a => { send_payment(&nodes[1], &nodes[2], chan_b, 10_000, &mut payment_id); },
 851                         0x3b => { send_payment(&nodes[2], &nodes[1], chan_b, 10_000, &mut payment_id); },
 852                         0x3c => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 10_000, &mut payment_id); },
 853                         0x3d => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 10_000, &mut payment_id); },
 854
 855                         0x40 => { send_payment(&nodes[0], &nodes[1], chan_a, 1_000, &mut payment_id); },
 856                         0x41 => { send_payment(&nodes[1], &nodes[0], chan_a, 1_000, &mut payment_id); },
 857                         0x42 => { send_payment(&nodes[1], &nodes[2], chan_b, 1_000, &mut payment_id); },
 858                         0x43 => { send_payment(&nodes[2], &nodes[1], chan_b, 1_000, &mut payment_id); },
 859                         0x44 => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 1_000, &mut payment_id); },
 860                         0x45 => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 1_000, &mut payment_id); },
 861
 862                         0x48 => { send_payment(&nodes[0], &nodes[1], chan_a, 100, &mut payment_id); },
 863                         0x49 => { send_payment(&nodes[1], &nodes[0], chan_a, 100, &mut payment_id); },
 864                         0x4a => { send_payment(&nodes[1], &nodes[2], chan_b, 100, &mut payment_id); },
 865                         0x4b => { send_payment(&nodes[2], &nodes[1], chan_b, 100, &mut payment_id); },
 866                         0x4c => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 100, &mut payment_id); },
 867                         0x4d => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 100, &mut payment_id); },
 868
 869                         0x50 => { send_payment(&nodes[0], &nodes[1], chan_a, 10, &mut payment_id); },
 870                         0x51 => { send_payment(&nodes[1], &nodes[0], chan_a, 10, &mut payment_id); },
 871                         0x52 => { send_payment(&nodes[1], &nodes[2], chan_b, 10, &mut payment_id); },
 872                         0x53 => { send_payment(&nodes[2], &nodes[1], chan_b, 10, &mut payment_id); },
 873                         0x54 => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 10, &mut payment_id); },
 874                         0x55 => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 10, &mut payment_id); },
 875
 876                         0x58 => { send_payment(&nodes[0], &nodes[1], chan_a, 1, &mut payment_id); },
 877                         0x59 => { send_payment(&nodes[1], &nodes[0], chan_a, 1, &mut payment_id); },
 878                         0x5a => { send_payment(&nodes[1], &nodes[2], chan_b, 1, &mut payment_id); },
 879                         0x5b => { send_payment(&nodes[2], &nodes[1], chan_b, 1, &mut payment_id); },
 880                         0x5c => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 1, &mut payment_id); },
 881                         0x5d => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 1, &mut payment_id); },
 882
 883                         0xff => {
 884                                 // Test that no channel is in a stuck state where neither party can send funds even
 885                                 // after we resolve all pending events.
 886                                 // First make sure there are no pending monitor updates, resetting the error state
 887                                 // and calling channel_monitor_updated for each monitor.
 888                                 *monitor_a.update_ret.lock().unwrap() = Ok(());
 889                                 *monitor_b.update_ret.lock().unwrap() = Ok(());
 890                                 *monitor_c.update_ret.lock().unwrap() = Ok(());
 891
 892                                 if let Some((id, _)) = monitor_a.latest_monitors.lock().unwrap().get(&chan_1_funding) {
 893                                         nodes[0].channel_monitor_updated(&chan_1_funding, *id);
 894                                 }
 895                                 if let Some((id, _)) = monitor_b.latest_monitors.lock().unwrap().get(&chan_1_funding) {
 896                                         nodes[1].channel_monitor_updated(&chan_1_funding, *id);
 897                                 }
 898                                 if let Some((id, _)) = monitor_b.latest_monitors.lock().unwrap().get(&chan_2_funding) {
 899                                         nodes[1].channel_monitor_updated(&chan_2_funding, *id);
 900                                 }
 901                                 if let Some((id, _)) = monitor_c.latest_monitors.lock().unwrap().get(&chan_2_funding) {
 902                                         nodes[2].channel_monitor_updated(&chan_2_funding, *id);
 903                                 }
 904
 905                                 // Next, make sure peers are all connected to each other
 906                                 if chan_a_disconnected {
 907                                         nodes[0].peer_connected(&nodes[1].get_our_node_id(), &Init { features: InitFeatures::empty() });
 908                                         nodes[1].peer_connected(&nodes[0].get_our_node_id(), &Init { features: InitFeatures::empty() });
 909                                         chan_a_disconnected = false;
 910                                 }
 911                                 if chan_b_disconnected {
 912                                         nodes[1].peer_connected(&nodes[2].get_our_node_id(), &Init { features: InitFeatures::empty() });
 913                                         nodes[2].peer_connected(&nodes[1].get_our_node_id(), &Init { features: InitFeatures::empty() });
 914                                         chan_b_disconnected = false;
 915                                 }
 916
 917                                 for i in 0..std::usize::MAX {
 918                                         if i == 100 { panic!("It may take may iterations to settle the state, but it should not take forever"); }
 919                                         // Then, make sure any current forwards make their way to their destination
 920                                         if process_msg_events!(0, false) { continue; }
 921                                         if process_msg_events!(1, false) { continue; }
 922                                         if process_msg_events!(2, false) { continue; }
 923                                         // ...making sure any pending PendingHTLCsForwardable events are handled and
 924                                         // payments claimed.
 925                                         if process_events!(0, false) { continue; }
 926                                         if process_events!(1, false) { continue; }
 927                                         if process_events!(2, false) { continue; }
 928                                         break;
 929                                 }
 930
 931                                 // Finally, make sure that at least one end of each channel can make a substantial payment.
 932                                 assert!(
 933                                         send_payment(&nodes[0], &nodes[1], chan_a, 10_000_000, &mut payment_id) ||
 934                                         send_payment(&nodes[1], &nodes[0], chan_a, 10_000_000, &mut payment_id));
 935                                 assert!(
 936                                         send_payment(&nodes[1], &nodes[2], chan_b, 10_000_000, &mut payment_id) ||
 937                                         send_payment(&nodes[2], &nodes[1], chan_b, 10_000_000, &mut payment_id));
 938                         },
 939                         _ => test_return!(),
 940                 }
 941
 942                 node_a_ser.0.clear();
 943                 nodes[0].write(&mut node_a_ser).unwrap();
 944                 monitor_a.should_update_manager.store(false, atomic::Ordering::Relaxed);
 945                 node_b_ser.0.clear();
 946                 nodes[1].write(&mut node_b_ser).unwrap();
 947                 monitor_b.should_update_manager.store(false, atomic::Ordering::Relaxed);
 948                 node_c_ser.0.clear();
 949                 nodes[2].write(&mut node_c_ser).unwrap();
 950                 monitor_c.should_update_manager.store(false, atomic::Ordering::Relaxed);
 951         }
 952 }
 953
 954 pub fn chanmon_consistency_test<Out: test_logger::Output>(data: &[u8], out: Out) {
 955         do_test(data, out);
 956 }
 957
 958 #[no_mangle]
 959 pub extern "C" fn chanmon_consistency_run(data: *const u8, datalen: usize) {
 960         do_test(unsafe { std::slice::from_raw_parts(data, datalen) }, test_logger::DevNull{});
 961 }