_ 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::BitcoinHash;
  22 use bitcoin::blockdata::block::BlockHeader;
  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::chaininterface;
  33 use lightning::chain::transaction::OutPoint;
  34 use lightning::chain::chaininterface::{BroadcasterInterface,ConfirmationTarget,ChainListener,FeeEstimator,ChainWatchInterfaceUtil,ChainWatchInterface};
  35 use lightning::chain::keysinterface::{KeysInterface, InMemoryChannelKeys};
  36 use lightning::ln::channelmonitor;
  37 use lightning::ln::channelmonitor::{ChannelMonitor, ChannelMonitorUpdateErr, HTLCUpdate};
  38 use lightning::ln::channelmanager::{ChannelManager, PaymentHash, PaymentPreimage, PaymentSecret, 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::events;
  43 use lightning::util::logger::Logger;
  44 use lightning::util::config::UserConfig;
  45 use lightning::util::events::{EventsProvider, MessageSendEventsProvider};
  46 use lightning::util::ser::{Readable, ReadableArgs, Writeable, Writer};
  47 use lightning::routing::router::{Route, RouteHop};
  48
  49
  50 use utils::test_logger;
  51
  52 use bitcoin::secp256k1::key::{PublicKey,SecretKey};
  53 use bitcoin::secp256k1::Secp256k1;
  54
  55 use std::mem;
  56 use std::cmp::Ordering;
  57 use std::collections::{HashSet, hash_map, HashMap};
  58 use std::sync::{Arc,Mutex};
  59 use std::sync::atomic;
  60 use std::io::Cursor;
  61
  62 struct FuzzEstimator {}
  63 impl FeeEstimator for FuzzEstimator {
  64         fn get_est_sat_per_1000_weight(&self, _: ConfirmationTarget) -> u32 {
  65                 253
  66         }
  67 }
  68
  69 pub struct TestBroadcaster {}
  70 impl BroadcasterInterface for TestBroadcaster {
  71         fn broadcast_transaction(&self, _tx: &Transaction) { }
  72 }
  73
  74 pub struct VecWriter(pub Vec<u8>);
  75 impl Writer for VecWriter {
  76         fn write_all(&mut self, buf: &[u8]) -> Result<(), ::std::io::Error> {
  77                 self.0.extend_from_slice(buf);
  78                 Ok(())
  79         }
  80         fn size_hint(&mut self, size: usize) {
  81                 self.0.reserve_exact(size);
  82         }
  83 }
  84
  85 struct TestChannelMonitor {
  86         pub logger: Arc<dyn Logger>,
  87         pub simple_monitor: Arc<channelmonitor::SimpleManyChannelMonitor<OutPoint, EnforcingChannelKeys, Arc<TestBroadcaster>, Arc<FuzzEstimator>, Arc<dyn Logger>, Arc<dyn ChainWatchInterface>>>,
  88         pub update_ret: Mutex<Result<(), channelmonitor::ChannelMonitorUpdateErr>>,
  89         // If we reload a node with an old copy of ChannelMonitors, the ChannelManager deserialization
  90         // logic will automatically force-close our channels for us (as we don't have an up-to-date
  91         // monitor implying we are not able to punish misbehaving counterparties). Because this test
  92         // "fails" if we ever force-close a channel, we avoid doing so, always saving the latest
  93         // fully-serialized monitor state here, as well as the corresponding update_id.
  94         pub latest_monitors: Mutex<HashMap<OutPoint, (u64, Vec<u8>)>>,
  95         pub should_update_manager: atomic::AtomicBool,
  96 }
  97 impl TestChannelMonitor {
  98         pub fn new(chain_monitor: Arc<dyn chaininterface::ChainWatchInterface>, broadcaster: Arc<TestBroadcaster>, logger: Arc<dyn Logger>, feeest: Arc<FuzzEstimator>) -> Self {
  99                 Self {
 100                         simple_monitor: Arc::new(channelmonitor::SimpleManyChannelMonitor::new(chain_monitor, broadcaster, logger.clone(), feeest)),
 101                         logger,
 102                         update_ret: Mutex::new(Ok(())),
 103                         latest_monitors: Mutex::new(HashMap::new()),
 104                         should_update_manager: atomic::AtomicBool::new(false),
 105                 }
 106         }
 107 }
 108 impl channelmonitor::ManyChannelMonitor for TestChannelMonitor {
 109         type Keys = EnforcingChannelKeys;
 110
 111         fn add_monitor(&self, funding_txo: OutPoint, monitor: channelmonitor::ChannelMonitor<EnforcingChannelKeys>) -> Result<(), channelmonitor::ChannelMonitorUpdateErr> {
 112                 let mut ser = VecWriter(Vec::new());
 113                 monitor.write_for_disk(&mut ser).unwrap();
 114                 if let Some(_) = self.latest_monitors.lock().unwrap().insert(funding_txo, (monitor.get_latest_update_id(), ser.0)) {
 115                         panic!("Already had monitor pre-add_monitor");
 116                 }
 117                 self.should_update_manager.store(true, atomic::Ordering::Relaxed);
 118                 assert!(self.simple_monitor.add_monitor(funding_txo, monitor).is_ok());
 119                 self.update_ret.lock().unwrap().clone()
 120         }
 121
 122         fn update_monitor(&self, funding_txo: OutPoint, update: channelmonitor::ChannelMonitorUpdate) -> Result<(), channelmonitor::ChannelMonitorUpdateErr> {
 123                 let mut map_lock = self.latest_monitors.lock().unwrap();
 124                 let mut map_entry = match map_lock.entry(funding_txo) {
 125                         hash_map::Entry::Occupied(entry) => entry,
 126                         hash_map::Entry::Vacant(_) => panic!("Didn't have monitor on update call"),
 127                 };
 128                 let mut deserialized_monitor = <(BlockHash, channelmonitor::ChannelMonitor<EnforcingChannelKeys>)>::
 129                         read(&mut Cursor::new(&map_entry.get().1)).unwrap().1;
 130                 deserialized_monitor.update_monitor(update.clone(), &&TestBroadcaster {}, &self.logger).unwrap();
 131                 let mut ser = VecWriter(Vec::new());
 132                 deserialized_monitor.write_for_disk(&mut ser).unwrap();
 133                 map_entry.insert((update.update_id, ser.0));
 134                 self.should_update_manager.store(true, atomic::Ordering::Relaxed);
 135                 self.update_ret.lock().unwrap().clone()
 136         }
 137
 138         fn get_monitor_would_broadcast(&self, funding_txo: &OutPoint, height: u32) -> bool {
 139                 self.simple_monitor.get_monitor_would_broadcast(funding_txo, height)
 140         }
 141
 142         fn get_and_clear_pending_htlcs_updated(&self) -> Vec<HTLCUpdate> {
 143                 return self.simple_monitor.get_and_clear_pending_htlcs_updated();
 144         }
 145 }
 146
 147 struct KeyProvider {
 148         node_id: u8,
 149         session_id: atomic::AtomicU8,
 150         channel_id: atomic::AtomicU8,
 151 }
 152 impl KeysInterface for KeyProvider {
 153         type ChanKeySigner = EnforcingChannelKeys;
 154
 155         fn get_node_secret(&self) -> SecretKey {
 156                 SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, self.node_id]).unwrap()
 157         }
 158
 159         fn get_destination_script(&self) -> Script {
 160                 let secp_ctx = Secp256k1::signing_only();
 161                 let channel_monitor_claim_key = SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, self.node_id]).unwrap();
 162                 let our_channel_monitor_claim_key_hash = WPubkeyHash::hash(&PublicKey::from_secret_key(&secp_ctx, &channel_monitor_claim_key).serialize());
 163                 Builder::new().push_opcode(opcodes::all::OP_PUSHBYTES_0).push_slice(&our_channel_monitor_claim_key_hash[..]).into_script()
 164         }
 165
 166         fn get_shutdown_pubkey(&self) -> PublicKey {
 167                 let secp_ctx = Secp256k1::signing_only();
 168                 PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, self.node_id]).unwrap())
 169         }
 170
 171         fn get_channel_keys(&self, _inbound: bool, channel_value_satoshis: u64) -> EnforcingChannelKeys {
 172                 let secp_ctx = Secp256k1::signing_only();
 173                 EnforcingChannelKeys::new(InMemoryChannelKeys::new(
 174                         &secp_ctx,
 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, 4, 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, 5, 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, 6, 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, 7, self.node_id]).unwrap(),
 179                         SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, self.node_id]).unwrap(),
 180                         [0, 0, 0, 0, 0, 0, 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],
 181                         channel_value_satoshis,
 182                         (0, 0),
 183                 ))
 184         }
 185
 186         fn get_onion_rand(&self) -> (SecretKey, [u8; 32]) {
 187                 let id = self.session_id.fetch_add(1, atomic::Ordering::Relaxed);
 188                 (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, id, 10, self.node_id]).unwrap(),
 189                 [0; 32])
 190         }
 191
 192         fn get_channel_id(&self) -> [u8; 32] {
 193                 let id = self.channel_id.fetch_add(1, atomic::Ordering::Relaxed);
 194                 [0, 0, 0, 0, 0, 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]
 195         }
 196 }
 197
 198 #[inline]
 199 pub fn do_test<Out: test_logger::Output>(data: &[u8], out: Out) {
 200         let fee_est = Arc::new(FuzzEstimator{});
 201         let broadcast = Arc::new(TestBroadcaster{});
 202
 203         macro_rules! make_node {
 204                 ($node_id: expr) => { {
 205                         let logger: Arc<dyn Logger> = Arc::new(test_logger::TestLogger::new($node_id.to_string(), out.clone()));
 206                         let watch = Arc::new(ChainWatchInterfaceUtil::new(Network::Bitcoin));
 207                         let monitor = Arc::new(TestChannelMonitor::new(watch.clone(), broadcast.clone(), logger.clone(), fee_est.clone()));
 208
 209                         let keys_manager = Arc::new(KeyProvider { node_id: $node_id, session_id: atomic::AtomicU8::new(0), channel_id: atomic::AtomicU8::new(0) });
 210                         let mut config = UserConfig::default();
 211                         config.channel_options.fee_proportional_millionths = 0;
 212                         config.channel_options.announced_channel = true;
 213                         config.peer_channel_config_limits.min_dust_limit_satoshis = 0;
 214                         (Arc::new(ChannelManager::new(Network::Bitcoin, fee_est.clone(), monitor.clone(), broadcast.clone(), Arc::clone(&logger), keys_manager.clone(), config, 0)),
 215                         monitor)
 216                 } }
 217         }
 218
 219         macro_rules! reload_node {
 220                 ($ser: expr, $node_id: expr, $old_monitors: expr) => { {
 221                         let logger: Arc<dyn Logger> = Arc::new(test_logger::TestLogger::new($node_id.to_string(), out.clone()));
 222                         let watch = Arc::new(ChainWatchInterfaceUtil::new(Network::Bitcoin));
 223                         let monitor = Arc::new(TestChannelMonitor::new(watch.clone(), broadcast.clone(), logger.clone(), fee_est.clone()));
 224
 225                         let keys_manager = Arc::new(KeyProvider { node_id: $node_id, session_id: atomic::AtomicU8::new(0), channel_id: atomic::AtomicU8::new(0) });
 226                         let mut config = UserConfig::default();
 227                         config.channel_options.fee_proportional_millionths = 0;
 228                         config.channel_options.announced_channel = true;
 229                         config.peer_channel_config_limits.min_dust_limit_satoshis = 0;
 230
 231                         let mut monitors = HashMap::new();
 232                         let mut old_monitors = $old_monitors.latest_monitors.lock().unwrap();
 233                         for (outpoint, (update_id, monitor_ser)) in old_monitors.drain() {
 234                                 monitors.insert(outpoint, <(BlockHash, ChannelMonitor<EnforcingChannelKeys>)>::read(&mut Cursor::new(&monitor_ser)).expect("Failed to read monitor").1);
 235                                 monitor.latest_monitors.lock().unwrap().insert(outpoint, (update_id, monitor_ser));
 236                         }
 237                         let mut monitor_refs = HashMap::new();
 238                         for (outpoint, monitor) in monitors.iter_mut() {
 239                                 monitor_refs.insert(*outpoint, monitor);
 240                         }
 241
 242                         let read_args = ChannelManagerReadArgs {
 243                                 keys_manager,
 244                                 fee_estimator: fee_est.clone(),
 245                                 monitor: monitor.clone(),
 246                                 tx_broadcaster: broadcast.clone(),
 247                                 logger,
 248                                 default_config: config,
 249                                 channel_monitors: &mut monitor_refs,
 250                         };
 251
 252                         (<(BlockHash, ChannelManager<EnforcingChannelKeys, Arc<TestChannelMonitor>, Arc<TestBroadcaster>, Arc<KeyProvider>, Arc<FuzzEstimator>, Arc<dyn Logger>>)>::read(&mut Cursor::new(&$ser.0), read_args).expect("Failed to read manager").1, monitor)
 253                 } }
 254         }
 255
 256         let mut channel_txn = Vec::new();
 257         macro_rules! make_channel {
 258                 ($source: expr, $dest: expr, $chan_id: expr) => { {
 259                         $source.create_channel($dest.get_our_node_id(), 10000000, 42, 0, None).unwrap();
 260                         let open_channel = {
 261                                 let events = $source.get_and_clear_pending_msg_events();
 262                                 assert_eq!(events.len(), 1);
 263                                 if let events::MessageSendEvent::SendOpenChannel { ref msg, .. } = events[0] {
 264                                         msg.clone()
 265                                 } else { panic!("Wrong event type"); }
 266                         };
 267
 268                         $dest.handle_open_channel(&$source.get_our_node_id(), InitFeatures::known(), &open_channel);
 269                         let accept_channel = {
 270                                 let events = $dest.get_and_clear_pending_msg_events();
 271                                 assert_eq!(events.len(), 1);
 272                                 if let events::MessageSendEvent::SendAcceptChannel { ref msg, .. } = events[0] {
 273                                         msg.clone()
 274                                 } else { panic!("Wrong event type"); }
 275                         };
 276
 277                         $source.handle_accept_channel(&$dest.get_our_node_id(), InitFeatures::known(), &accept_channel);
 278                         let funding_output;
 279                         {
 280                                 let events = $source.get_and_clear_pending_events();
 281                                 assert_eq!(events.len(), 1);
 282                                 if let events::Event::FundingGenerationReady { ref temporary_channel_id, ref channel_value_satoshis, ref output_script, .. } = events[0] {
 283                                         let tx = Transaction { version: $chan_id, lock_time: 0, input: Vec::new(), output: vec![TxOut {
 284                                                 value: *channel_value_satoshis, script_pubkey: output_script.clone(),
 285                                         }]};
 286                                         funding_output = OutPoint { txid: tx.txid(), index: 0 };
 287                                         $source.funding_transaction_generated(&temporary_channel_id, funding_output);
 288                                         channel_txn.push(tx);
 289                                 } else { panic!("Wrong event type"); }
 290                         }
 291
 292                         let funding_created = {
 293                                 let events = $source.get_and_clear_pending_msg_events();
 294                                 assert_eq!(events.len(), 1);
 295                                 if let events::MessageSendEvent::SendFundingCreated { ref msg, .. } = events[0] {
 296                                         msg.clone()
 297                                 } else { panic!("Wrong event type"); }
 298                         };
 299                         $dest.handle_funding_created(&$source.get_our_node_id(), &funding_created);
 300
 301                         let funding_signed = {
 302                                 let events = $dest.get_and_clear_pending_msg_events();
 303                                 assert_eq!(events.len(), 1);
 304                                 if let events::MessageSendEvent::SendFundingSigned { ref msg, .. } = events[0] {
 305                                         msg.clone()
 306                                 } else { panic!("Wrong event type"); }
 307                         };
 308                         $source.handle_funding_signed(&$dest.get_our_node_id(), &funding_signed);
 309
 310                         {
 311                                 let events = $source.get_and_clear_pending_events();
 312                                 assert_eq!(events.len(), 1);
 313                                 if let events::Event::FundingBroadcastSafe { .. } = events[0] {
 314                                 } else { panic!("Wrong event type"); }
 315                         }
 316                         funding_output
 317                 } }
 318         }
 319
 320         macro_rules! confirm_txn {
 321                 ($node: expr) => { {
 322                         let mut header = BlockHeader { version: 0x20000000, prev_blockhash: Default::default(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
 323                         let mut txn = Vec::with_capacity(channel_txn.len());
 324                         let mut posn = Vec::with_capacity(channel_txn.len());
 325                         for i in 0..channel_txn.len() {
 326                                 txn.push(&channel_txn[i]);
 327                                 posn.push(i + 1);
 328                         }
 329                         $node.block_connected(&header, 1, &txn, &posn);
 330                         for i in 2..100 {
 331                                 header = BlockHeader { version: 0x20000000, prev_blockhash: header.bitcoin_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
 332                                 $node.block_connected(&header, i, &Vec::new(), &[0; 0]);
 333                         }
 334                 } }
 335         }
 336
 337         macro_rules! lock_fundings {
 338                 ($nodes: expr) => { {
 339                         let mut node_events = Vec::new();
 340                         for node in $nodes.iter() {
 341                                 node_events.push(node.get_and_clear_pending_msg_events());
 342                         }
 343                         for (idx, node_event) in node_events.iter().enumerate() {
 344                                 for event in node_event {
 345                                         if let events::MessageSendEvent::SendFundingLocked { ref node_id, ref msg } = event {
 346                                                 for node in $nodes.iter() {
 347                                                         if node.get_our_node_id() == *node_id {
 348                                                                 node.handle_funding_locked(&$nodes[idx].get_our_node_id(), msg);
 349                                                         }
 350                                                 }
 351                                         } else { panic!("Wrong event type"); }
 352                                 }
 353                         }
 354
 355                         for node in $nodes.iter() {
 356                                 let events = node.get_and_clear_pending_msg_events();
 357                                 for event in events {
 358                                         if let events::MessageSendEvent::SendAnnouncementSignatures { .. } = event {
 359                                         } else { panic!("Wrong event type"); }
 360                                 }
 361                         }
 362                 } }
 363         }
 364
 365         // 3 nodes is enough to hit all the possible cases, notably unknown-source-unknown-dest
 366         // forwarding.
 367         let (mut node_a, mut monitor_a) = make_node!(0);
 368         let (mut node_b, mut monitor_b) = make_node!(1);
 369         let (mut node_c, mut monitor_c) = make_node!(2);
 370
 371         let mut nodes = [node_a, node_b, node_c];
 372
 373         let chan_1_funding = make_channel!(nodes[0], nodes[1], 0);
 374         let chan_2_funding = make_channel!(nodes[1], nodes[2], 1);
 375
 376         for node in nodes.iter() {
 377                 confirm_txn!(node);
 378         }
 379
 380         lock_fundings!(nodes);
 381
 382         let chan_a = nodes[0].list_usable_channels()[0].short_channel_id.unwrap();
 383         let chan_b = nodes[2].list_usable_channels()[0].short_channel_id.unwrap();
 384
 385         let mut payment_id = 0;
 386
 387         let mut chan_a_disconnected = false;
 388         let mut chan_b_disconnected = false;
 389         let mut ba_events = Vec::new();
 390         let mut bc_events = Vec::new();
 391
 392         let mut node_a_ser = VecWriter(Vec::new());
 393         nodes[0].write(&mut node_a_ser).unwrap();
 394         let mut node_b_ser = VecWriter(Vec::new());
 395         nodes[1].write(&mut node_b_ser).unwrap();
 396         let mut node_c_ser = VecWriter(Vec::new());
 397         nodes[2].write(&mut node_c_ser).unwrap();
 398
 399         macro_rules! test_return {
 400                 () => { {
 401                         assert_eq!(nodes[0].list_channels().len(), 1);
 402                         assert_eq!(nodes[1].list_channels().len(), 2);
 403                         assert_eq!(nodes[2].list_channels().len(), 1);
 404                         return;
 405                 } }
 406         }
 407
 408         let mut read_pos = 0;
 409         macro_rules! get_slice {
 410                 ($len: expr) => {
 411                         {
 412                                 let slice_len = $len as usize;
 413                                 if data.len() < read_pos + slice_len {
 414                                         test_return!();
 415                                 }
 416                                 read_pos += slice_len;
 417                                 &data[read_pos - slice_len..read_pos]
 418                         }
 419                 }
 420         }
 421
 422         loop {
 423                 macro_rules! send_payment {
 424                         ($source: expr, $dest: expr, $amt: expr) => { {
 425                                 let payment_hash = Sha256::hash(&[payment_id; 1]);
 426                                 payment_id = payment_id.wrapping_add(1);
 427                                 if let Err(_) = $source.send_payment(&Route {
 428                                         paths: vec![vec![RouteHop {
 429                                                 pubkey: $dest.0.get_our_node_id(),
 430                                                 node_features: NodeFeatures::empty(),
 431                                                 short_channel_id: $dest.1,
 432                                                 channel_features: ChannelFeatures::empty(),
 433                                                 fee_msat: $amt,
 434                                                 cltv_expiry_delta: 200,
 435                                         }]],
 436                                 }, PaymentHash(payment_hash.into_inner()), &None) {
 437                                         // Probably ran out of funds
 438                                         test_return!();
 439                                 }
 440                         } };
 441                         ($source: expr, $middle: expr, $dest: expr, $amt: expr) => { {
 442                                 let payment_hash = Sha256::hash(&[payment_id; 1]);
 443                                 payment_id = payment_id.wrapping_add(1);
 444                                 if let Err(_) = $source.send_payment(&Route {
 445                                         paths: vec![vec![RouteHop {
 446                                                 pubkey: $middle.0.get_our_node_id(),
 447                                                 node_features: NodeFeatures::empty(),
 448                                                 short_channel_id: $middle.1,
 449                                                 channel_features: ChannelFeatures::empty(),
 450                                                 fee_msat: 50000,
 451                                                 cltv_expiry_delta: 100,
 452                                         },RouteHop {
 453                                                 pubkey: $dest.0.get_our_node_id(),
 454                                                 node_features: NodeFeatures::empty(),
 455                                                 short_channel_id: $dest.1,
 456                                                 channel_features: ChannelFeatures::empty(),
 457                                                 fee_msat: $amt,
 458                                                 cltv_expiry_delta: 200,
 459                                         }]],
 460                                 }, PaymentHash(payment_hash.into_inner()), &None) {
 461                                         // Probably ran out of funds
 462                                         test_return!();
 463                                 }
 464                         } }
 465                 }
 466                 macro_rules! send_payment_with_secret {
 467                         ($source: expr, $middle: expr, $dest: expr) => { {
 468                                 let payment_hash = Sha256::hash(&[payment_id; 1]);
 469                                 payment_id = payment_id.wrapping_add(1);
 470                                 let payment_secret = Sha256::hash(&[payment_id; 1]);
 471                                 payment_id = payment_id.wrapping_add(1);
 472                                 if let Err(_) = $source.send_payment(&Route {
 473                                         paths: vec![vec![RouteHop {
 474                                                 pubkey: $middle.0.get_our_node_id(),
 475                                                 node_features: NodeFeatures::empty(),
 476                                                 short_channel_id: $middle.1,
 477                                                 channel_features: ChannelFeatures::empty(),
 478                                                 fee_msat: 50000,
 479                                                 cltv_expiry_delta: 100,
 480                                         },RouteHop {
 481                                                 pubkey: $dest.0.get_our_node_id(),
 482                                                 node_features: NodeFeatures::empty(),
 483                                                 short_channel_id: $dest.1,
 484                                                 channel_features: ChannelFeatures::empty(),
 485                                                 fee_msat: 5000000,
 486                                                 cltv_expiry_delta: 200,
 487                                         }],vec![RouteHop {
 488                                                 pubkey: $middle.0.get_our_node_id(),
 489                                                 node_features: NodeFeatures::empty(),
 490                                                 short_channel_id: $middle.1,
 491                                                 channel_features: ChannelFeatures::empty(),
 492                                                 fee_msat: 50000,
 493                                                 cltv_expiry_delta: 100,
 494                                         },RouteHop {
 495                                                 pubkey: $dest.0.get_our_node_id(),
 496                                                 node_features: NodeFeatures::empty(),
 497                                                 short_channel_id: $dest.1,
 498                                                 channel_features: ChannelFeatures::empty(),
 499                                                 fee_msat: 5000000,
 500                                                 cltv_expiry_delta: 200,
 501                                         }]],
 502                                 }, PaymentHash(payment_hash.into_inner()), &Some(PaymentSecret(payment_secret.into_inner()))) {
 503                                         // Probably ran out of funds
 504                                         test_return!();
 505                                 }
 506                         } }
 507                 }
 508
 509                 macro_rules! process_msg_events {
 510                         ($node: expr, $corrupt_forward: expr) => { {
 511                                 let events = if $node == 1 {
 512                                         let mut new_events = Vec::new();
 513                                         mem::swap(&mut new_events, &mut ba_events);
 514                                         new_events.extend_from_slice(&bc_events[..]);
 515                                         bc_events.clear();
 516                                         new_events
 517                                 } else { Vec::new() };
 518                                 for event in events.iter().chain(nodes[$node].get_and_clear_pending_msg_events().iter()) {
 519                                         match event {
 520                                                 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 } } => {
 521                                                         for dest in nodes.iter() {
 522                                                                 if dest.get_our_node_id() == *node_id {
 523                                                                         assert!(update_fee.is_none());
 524                                                                         for update_add in update_add_htlcs {
 525                                                                                 if !$corrupt_forward {
 526                                                                                         dest.handle_update_add_htlc(&nodes[$node].get_our_node_id(), &update_add);
 527                                                                                 } else {
 528                                                                                         // Corrupt the update_add_htlc message so that its HMAC
 529                                                                                         // check will fail and we generate a
 530                                                                                         // update_fail_malformed_htlc instead of an
 531                                                                                         // update_fail_htlc as we do when we reject a payment.
 532                                                                                         let mut msg_ser = update_add.encode();
 533                                                                                         msg_ser[1000] ^= 0xff;
 534                                                                                         let new_msg = UpdateAddHTLC::read(&mut Cursor::new(&msg_ser)).unwrap();
 535                                                                                         dest.handle_update_add_htlc(&nodes[$node].get_our_node_id(), &new_msg);
 536                                                                                 }
 537                                                                         }
 538                                                                         for update_fulfill in update_fulfill_htlcs {
 539                                                                                 dest.handle_update_fulfill_htlc(&nodes[$node].get_our_node_id(), &update_fulfill);
 540                                                                         }
 541                                                                         for update_fail in update_fail_htlcs {
 542                                                                                 dest.handle_update_fail_htlc(&nodes[$node].get_our_node_id(), &update_fail);
 543                                                                         }
 544                                                                         for update_fail_malformed in update_fail_malformed_htlcs {
 545                                                                                 dest.handle_update_fail_malformed_htlc(&nodes[$node].get_our_node_id(), &update_fail_malformed);
 546                                                                         }
 547                                                                         dest.handle_commitment_signed(&nodes[$node].get_our_node_id(), &commitment_signed);
 548                                                                 }
 549                                                         }
 550                                                 },
 551                                                 events::MessageSendEvent::SendRevokeAndACK { ref node_id, ref msg } => {
 552                                                         for dest in nodes.iter() {
 553                                                                 if dest.get_our_node_id() == *node_id {
 554                                                                         dest.handle_revoke_and_ack(&nodes[$node].get_our_node_id(), msg);
 555                                                                 }
 556                                                         }
 557                                                 },
 558                                                 events::MessageSendEvent::SendChannelReestablish { ref node_id, ref msg } => {
 559                                                         for dest in nodes.iter() {
 560                                                                 if dest.get_our_node_id() == *node_id {
 561                                                                         dest.handle_channel_reestablish(&nodes[$node].get_our_node_id(), msg);
 562                                                                 }
 563                                                         }
 564                                                 },
 565                                                 events::MessageSendEvent::SendFundingLocked { .. } => {
 566                                                         // Can be generated as a reestablish response
 567                                                 },
 568                                                 events::MessageSendEvent::PaymentFailureNetworkUpdate { .. } => {
 569                                                         // Can be generated due to a payment forward being rejected due to a
 570                                                         // channel having previously failed a monitor update
 571                                                 },
 572                                                 events::MessageSendEvent::HandleError { action: ErrorAction::IgnoreError, .. } => {
 573                                                         // Can be generated at any processing step to send back an error, disconnect
 574                                                         // peer or just ignore
 575                                                 },
 576                                                 _ => panic!("Unhandled message event"),
 577                                         }
 578                                 }
 579                         } }
 580                 }
 581
 582                 macro_rules! drain_msg_events_on_disconnect {
 583                         ($counterparty_id: expr) => { {
 584                                 if $counterparty_id == 0 {
 585                                         for event in nodes[0].get_and_clear_pending_msg_events() {
 586                                                 match event {
 587                                                         events::MessageSendEvent::UpdateHTLCs { .. } => {},
 588                                                         events::MessageSendEvent::SendRevokeAndACK { .. } => {},
 589                                                         events::MessageSendEvent::SendChannelReestablish { .. } => {},
 590                                                         events::MessageSendEvent::SendFundingLocked { .. } => {},
 591                                                         events::MessageSendEvent::PaymentFailureNetworkUpdate { .. } => {},
 592                                                         events::MessageSendEvent::HandleError { action: ErrorAction::IgnoreError, .. } => {},
 593                                                         _ => panic!("Unhandled message event"),
 594                                                 }
 595                                         }
 596                                         ba_events.clear();
 597                                 } else {
 598                                         for event in nodes[2].get_and_clear_pending_msg_events() {
 599                                                 match event {
 600                                                         events::MessageSendEvent::UpdateHTLCs { .. } => {},
 601                                                         events::MessageSendEvent::SendRevokeAndACK { .. } => {},
 602                                                         events::MessageSendEvent::SendChannelReestablish { .. } => {},
 603                                                         events::MessageSendEvent::SendFundingLocked { .. } => {},
 604                                                         events::MessageSendEvent::PaymentFailureNetworkUpdate { .. } => {},
 605                                                         events::MessageSendEvent::HandleError { action: ErrorAction::IgnoreError, .. } => {},
 606                                                         _ => panic!("Unhandled message event"),
 607                                                 }
 608                                         }
 609                                         bc_events.clear();
 610                                 }
 611                                 let mut events = nodes[1].get_and_clear_pending_msg_events();
 612                                 let drop_node_id = if $counterparty_id == 0 { nodes[0].get_our_node_id() } else { nodes[2].get_our_node_id() };
 613                                 let msg_sink = if $counterparty_id == 0 { &mut bc_events } else { &mut ba_events };
 614                                 for event in events.drain(..) {
 615                                         let push = match event {
 616                                                 events::MessageSendEvent::UpdateHTLCs { ref node_id, .. } => {
 617                                                         if *node_id != drop_node_id { true } else { false }
 618                                                 },
 619                                                 events::MessageSendEvent::SendRevokeAndACK { ref node_id, .. } => {
 620                                                         if *node_id != drop_node_id { true } else { false }
 621                                                 },
 622                                                 events::MessageSendEvent::SendChannelReestablish { ref node_id, .. } => {
 623                                                         if *node_id != drop_node_id { true } else { false }
 624                                                 },
 625                                                 events::MessageSendEvent::SendFundingLocked { .. } => false,
 626                                                 events::MessageSendEvent::PaymentFailureNetworkUpdate { .. } => false,
 627                                                 events::MessageSendEvent::HandleError { action: ErrorAction::IgnoreError, .. } => false,
 628                                                 _ => panic!("Unhandled message event"),
 629                                         };
 630                                         if push { msg_sink.push(event); }
 631                                 }
 632                         } }
 633                 }
 634
 635                 macro_rules! process_events {
 636                         ($node: expr, $fail: expr) => { {
 637                                 // In case we get 256 payments we may have a hash collision, resulting in the
 638                                 // second claim/fail call not finding the duplicate-hash HTLC, so we have to
 639                                 // deduplicate the calls here.
 640                                 let mut claim_set = HashSet::new();
 641                                 let mut events = nodes[$node].get_and_clear_pending_events();
 642                                 // Sort events so that PendingHTLCsForwardable get processed last. This avoids a
 643                                 // case where we first process a PendingHTLCsForwardable, then claim/fail on a
 644                                 // PaymentReceived, claiming/failing two HTLCs, but leaving a just-generated
 645                                 // PaymentReceived event for the second HTLC in our pending_events (and breaking
 646                                 // our claim_set deduplication).
 647                                 events.sort_by(|a, b| {
 648                                         if let events::Event::PaymentReceived { .. } = a {
 649                                                 if let events::Event::PendingHTLCsForwardable { .. } = b {
 650                                                         Ordering::Less
 651                                                 } else { Ordering::Equal }
 652                                         } else if let events::Event::PendingHTLCsForwardable { .. } = a {
 653                                                 if let events::Event::PaymentReceived { .. } = b {
 654                                                         Ordering::Greater
 655                                                 } else { Ordering::Equal }
 656                                         } else { Ordering::Equal }
 657                                 });
 658                                 for event in events.drain(..) {
 659                                         match event {
 660                                                 events::Event::PaymentReceived { payment_hash, payment_secret, amt } => {
 661                                                         if claim_set.insert(payment_hash.0) {
 662                                                                 if $fail {
 663                                                                         assert!(nodes[$node].fail_htlc_backwards(&payment_hash, &payment_secret));
 664                                                                 } else {
 665                                                                         assert!(nodes[$node].claim_funds(PaymentPreimage(payment_hash.0), &payment_secret, amt));
 666                                                                 }
 667                                                         }
 668                                                 },
 669                                                 events::Event::PaymentSent { .. } => {},
 670                                                 events::Event::PaymentFailed { .. } => {},
 671                                                 events::Event::PendingHTLCsForwardable { .. } => {
 672                                                         nodes[$node].process_pending_htlc_forwards();
 673                                                 },
 674                                                 _ => panic!("Unhandled event"),
 675                                         }
 676                                 }
 677                         } }
 678                 }
 679
 680                 match get_slice!(1)[0] {
 681                         0x00 => *monitor_a.update_ret.lock().unwrap() = Err(ChannelMonitorUpdateErr::TemporaryFailure),
 682                         0x01 => *monitor_b.update_ret.lock().unwrap() = Err(ChannelMonitorUpdateErr::TemporaryFailure),
 683                         0x02 => *monitor_c.update_ret.lock().unwrap() = Err(ChannelMonitorUpdateErr::TemporaryFailure),
 684                         0x03 => *monitor_a.update_ret.lock().unwrap() = Ok(()),
 685                         0x04 => *monitor_b.update_ret.lock().unwrap() = Ok(()),
 686                         0x05 => *monitor_c.update_ret.lock().unwrap() = Ok(()),
 687                         0x06 => {
 688                                 if let Some((id, _)) = monitor_a.latest_monitors.lock().unwrap().get(&chan_1_funding) {
 689                                         nodes[0].channel_monitor_updated(&chan_1_funding, *id);
 690                                 }
 691                         },
 692                         0x07 => {
 693                                 if let Some((id, _)) = monitor_b.latest_monitors.lock().unwrap().get(&chan_1_funding) {
 694                                         nodes[1].channel_monitor_updated(&chan_1_funding, *id);
 695                                 }
 696                         },
 697                         0x24 => {
 698                                 if let Some((id, _)) = monitor_b.latest_monitors.lock().unwrap().get(&chan_2_funding) {
 699                                         nodes[1].channel_monitor_updated(&chan_2_funding, *id);
 700                                 }
 701                         },
 702                         0x08 => {
 703                                 if let Some((id, _)) = monitor_c.latest_monitors.lock().unwrap().get(&chan_2_funding) {
 704                                         nodes[2].channel_monitor_updated(&chan_2_funding, *id);
 705                                 }
 706                         },
 707                         0x09 => send_payment!(nodes[0], (&nodes[1], chan_a), 5_000_000),
 708                         0x0a => send_payment!(nodes[1], (&nodes[0], chan_a), 5_000_000),
 709                         0x0b => send_payment!(nodes[1], (&nodes[2], chan_b), 5_000_000),
 710                         0x0c => send_payment!(nodes[2], (&nodes[1], chan_b), 5_000_000),
 711                         0x0d => send_payment!(nodes[0], (&nodes[1], chan_a), (&nodes[2], chan_b), 5_000_000),
 712                         0x0e => send_payment!(nodes[2], (&nodes[1], chan_b), (&nodes[0], chan_a), 5_000_000),
 713                         0x0f => {
 714                                 if !chan_a_disconnected {
 715                                         nodes[0].peer_disconnected(&nodes[1].get_our_node_id(), false);
 716                                         nodes[1].peer_disconnected(&nodes[0].get_our_node_id(), false);
 717                                         chan_a_disconnected = true;
 718                                         drain_msg_events_on_disconnect!(0);
 719                                 }
 720                         },
 721                         0x10 => {
 722                                 if !chan_b_disconnected {
 723                                         nodes[1].peer_disconnected(&nodes[2].get_our_node_id(), false);
 724                                         nodes[2].peer_disconnected(&nodes[1].get_our_node_id(), false);
 725                                         chan_b_disconnected = true;
 726                                         drain_msg_events_on_disconnect!(2);
 727                                 }
 728                         },
 729                         0x11 => {
 730                                 if chan_a_disconnected {
 731                                         nodes[0].peer_connected(&nodes[1].get_our_node_id(), &Init { features: InitFeatures::empty() });
 732                                         nodes[1].peer_connected(&nodes[0].get_our_node_id(), &Init { features: InitFeatures::empty() });
 733                                         chan_a_disconnected = false;
 734                                 }
 735                         },
 736                         0x12 => {
 737                                 if chan_b_disconnected {
 738                                         nodes[1].peer_connected(&nodes[2].get_our_node_id(), &Init { features: InitFeatures::empty() });
 739                                         nodes[2].peer_connected(&nodes[1].get_our_node_id(), &Init { features: InitFeatures::empty() });
 740                                         chan_b_disconnected = false;
 741                                 }
 742                         },
 743                         0x13 => process_msg_events!(0, true),
 744                         0x14 => process_msg_events!(0, false),
 745                         0x15 => process_events!(0, true),
 746                         0x16 => process_events!(0, false),
 747                         0x17 => process_msg_events!(1, true),
 748                         0x18 => process_msg_events!(1, false),
 749                         0x19 => process_events!(1, true),
 750                         0x1a => process_events!(1, false),
 751                         0x1b => process_msg_events!(2, true),
 752                         0x1c => process_msg_events!(2, false),
 753                         0x1d => process_events!(2, true),
 754                         0x1e => process_events!(2, false),
 755                         0x1f => {
 756                                 if !chan_a_disconnected {
 757                                         nodes[1].peer_disconnected(&nodes[0].get_our_node_id(), false);
 758                                         chan_a_disconnected = true;
 759                                         drain_msg_events_on_disconnect!(0);
 760                                 }
 761                                 let (new_node_a, new_monitor_a) = reload_node!(node_a_ser, 0, monitor_a);
 762                                 node_a = Arc::new(new_node_a);
 763                                 nodes[0] = node_a.clone();
 764                                 monitor_a = new_monitor_a;
 765                         },
 766                         0x20 => {
 767                                 if !chan_a_disconnected {
 768                                         nodes[0].peer_disconnected(&nodes[1].get_our_node_id(), false);
 769                                         chan_a_disconnected = true;
 770                                         nodes[0].get_and_clear_pending_msg_events();
 771                                         ba_events.clear();
 772                                 }
 773                                 if !chan_b_disconnected {
 774                                         nodes[2].peer_disconnected(&nodes[1].get_our_node_id(), false);
 775                                         chan_b_disconnected = true;
 776                                         nodes[2].get_and_clear_pending_msg_events();
 777                                         bc_events.clear();
 778                                 }
 779                                 let (new_node_b, new_monitor_b) = reload_node!(node_b_ser, 1, monitor_b);
 780                                 node_b = Arc::new(new_node_b);
 781                                 nodes[1] = node_b.clone();
 782                                 monitor_b = new_monitor_b;
 783                         },
 784                         0x21 => {
 785                                 if !chan_b_disconnected {
 786                                         nodes[1].peer_disconnected(&nodes[2].get_our_node_id(), false);
 787                                         chan_b_disconnected = true;
 788                                         drain_msg_events_on_disconnect!(2);
 789                                 }
 790                                 let (new_node_c, new_monitor_c) = reload_node!(node_c_ser, 2, monitor_c);
 791                                 node_c = Arc::new(new_node_c);
 792                                 nodes[2] = node_c.clone();
 793                                 monitor_c = new_monitor_c;
 794                         },
 795                         0x22 => send_payment_with_secret!(nodes[0], (&nodes[1], chan_a), (&nodes[2], chan_b)),
 796                         0x23 => send_payment_with_secret!(nodes[2], (&nodes[1], chan_b), (&nodes[0], chan_a)),
 797                         0x25 => send_payment!(nodes[0], (&nodes[1], chan_a), 10),
 798                         0x26 => send_payment!(nodes[1], (&nodes[0], chan_a), 10),
 799                         0x27 => send_payment!(nodes[1], (&nodes[2], chan_b), 10),
 800                         0x28 => send_payment!(nodes[2], (&nodes[1], chan_b), 10),
 801                         0x29 => send_payment!(nodes[0], (&nodes[1], chan_a), (&nodes[2], chan_b), 10),
 802                         0x2a => send_payment!(nodes[2], (&nodes[1], chan_b), (&nodes[0], chan_a), 10),
 803                         0x2b => send_payment!(nodes[0], (&nodes[1], chan_a), 1_000),
 804                         0x2c => send_payment!(nodes[1], (&nodes[0], chan_a), 1_000),
 805                         0x2d => send_payment!(nodes[1], (&nodes[2], chan_b), 1_000),
 806                         0x2e => send_payment!(nodes[2], (&nodes[1], chan_b), 1_000),
 807                         0x2f => send_payment!(nodes[0], (&nodes[1], chan_a), (&nodes[2], chan_b), 1_000),
 808                         0x30 => send_payment!(nodes[2], (&nodes[1], chan_b), (&nodes[0], chan_a), 1_000),
 809                         0x31 => send_payment!(nodes[0], (&nodes[1], chan_a), 100_000),
 810                         0x32 => send_payment!(nodes[1], (&nodes[0], chan_a), 100_000),
 811                         0x33 => send_payment!(nodes[1], (&nodes[2], chan_b), 100_000),
 812                         0x34 => send_payment!(nodes[2], (&nodes[1], chan_b), 100_000),
 813                         0x35 => send_payment!(nodes[0], (&nodes[1], chan_a), (&nodes[2], chan_b), 100_000),
 814                         0x36 => send_payment!(nodes[2], (&nodes[1], chan_b), (&nodes[0], chan_a), 100_000),
 815                         // 0x24 defined above
 816                         _ => test_return!(),
 817                 }
 818
 819                 node_a_ser.0.clear();
 820                 nodes[0].write(&mut node_a_ser).unwrap();
 821                 monitor_a.should_update_manager.store(false, atomic::Ordering::Relaxed);
 822                 node_b_ser.0.clear();
 823                 nodes[1].write(&mut node_b_ser).unwrap();
 824                 monitor_b.should_update_manager.store(false, atomic::Ordering::Relaxed);
 825                 node_c_ser.0.clear();
 826                 nodes[2].write(&mut node_c_ser).unwrap();
 827                 monitor_c.should_update_manager.store(false, atomic::Ordering::Relaxed);
 828         }
 829 }
 830
 831 pub fn chanmon_consistency_test<Out: test_logger::Output>(data: &[u8], out: Out) {
 832         do_test(data, out);
 833 }
 834
 835 #[no_mangle]
 836 pub extern "C" fn chanmon_consistency_run(data: *const u8, datalen: usize) {
 837         do_test(unsafe { std::slice::from_raw_parts(data, datalen) }, test_logger::DevNull{});
 838 }