_ 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_and_clear_pending_htlcs_updated(&self) -> Vec<HTLCUpdate> {
 139                 return self.simple_monitor.get_and_clear_pending_htlcs_updated();
 140         }
 141 }
 142
 143 struct KeyProvider {
 144         node_id: u8,
 145         session_id: atomic::AtomicU8,
 146         channel_id: atomic::AtomicU8,
 147 }
 148 impl KeysInterface for KeyProvider {
 149         type ChanKeySigner = EnforcingChannelKeys;
 150
 151         fn get_node_secret(&self) -> SecretKey {
 152                 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()
 153         }
 154
 155         fn get_destination_script(&self) -> Script {
 156                 let secp_ctx = Secp256k1::signing_only();
 157                 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();
 158                 let our_channel_monitor_claim_key_hash = WPubkeyHash::hash(&PublicKey::from_secret_key(&secp_ctx, &channel_monitor_claim_key).serialize());
 159                 Builder::new().push_opcode(opcodes::all::OP_PUSHBYTES_0).push_slice(&our_channel_monitor_claim_key_hash[..]).into_script()
 160         }
 161
 162         fn get_shutdown_pubkey(&self) -> PublicKey {
 163                 let secp_ctx = Secp256k1::signing_only();
 164                 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())
 165         }
 166
 167         fn get_channel_keys(&self, _inbound: bool, channel_value_satoshis: u64) -> EnforcingChannelKeys {
 168                 let secp_ctx = Secp256k1::signing_only();
 169                 EnforcingChannelKeys::new(InMemoryChannelKeys::new(
 170                         &secp_ctx,
 171                         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(),
 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, 5, 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, 6, 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, 7, 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, 8, self.node_id]).unwrap(),
 176                         [0, 0, 0, 0, 0, 0, 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],
 177                         channel_value_satoshis,
 178                         (0, 0),
 179                 ))
 180         }
 181
 182         fn get_onion_rand(&self) -> (SecretKey, [u8; 32]) {
 183                 let id = self.session_id.fetch_add(1, atomic::Ordering::Relaxed);
 184                 (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(),
 185                 [0; 32])
 186         }
 187
 188         fn get_channel_id(&self) -> [u8; 32] {
 189                 let id = self.channel_id.fetch_add(1, atomic::Ordering::Relaxed);
 190                 [0, 0, 0, 0, 0, 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]
 191         }
 192 }
 193
 194 #[inline]
 195 pub fn do_test<Out: test_logger::Output>(data: &[u8], out: Out) {
 196         let fee_est = Arc::new(FuzzEstimator{});
 197         let broadcast = Arc::new(TestBroadcaster{});
 198
 199         macro_rules! make_node {
 200                 ($node_id: expr) => { {
 201                         let logger: Arc<dyn Logger> = Arc::new(test_logger::TestLogger::new($node_id.to_string(), out.clone()));
 202                         let watch = Arc::new(ChainWatchInterfaceUtil::new(Network::Bitcoin));
 203                         let monitor = Arc::new(TestChannelMonitor::new(watch.clone(), broadcast.clone(), logger.clone(), fee_est.clone()));
 204
 205                         let keys_manager = Arc::new(KeyProvider { node_id: $node_id, session_id: atomic::AtomicU8::new(0), channel_id: atomic::AtomicU8::new(0) });
 206                         let mut config = UserConfig::default();
 207                         config.channel_options.fee_proportional_millionths = 0;
 208                         config.channel_options.announced_channel = true;
 209                         config.peer_channel_config_limits.min_dust_limit_satoshis = 0;
 210                         (Arc::new(ChannelManager::new(Network::Bitcoin, fee_est.clone(), monitor.clone(), broadcast.clone(), Arc::clone(&logger), keys_manager.clone(), config, 0)),
 211                         monitor)
 212                 } }
 213         }
 214
 215         macro_rules! reload_node {
 216                 ($ser: expr, $node_id: expr, $old_monitors: expr) => { {
 217                         let logger: Arc<dyn Logger> = Arc::new(test_logger::TestLogger::new($node_id.to_string(), out.clone()));
 218                         let watch = Arc::new(ChainWatchInterfaceUtil::new(Network::Bitcoin));
 219                         let monitor = Arc::new(TestChannelMonitor::new(watch.clone(), broadcast.clone(), logger.clone(), fee_est.clone()));
 220
 221                         let keys_manager = Arc::new(KeyProvider { node_id: $node_id, session_id: atomic::AtomicU8::new(0), channel_id: atomic::AtomicU8::new(0) });
 222                         let mut config = UserConfig::default();
 223                         config.channel_options.fee_proportional_millionths = 0;
 224                         config.channel_options.announced_channel = true;
 225                         config.peer_channel_config_limits.min_dust_limit_satoshis = 0;
 226
 227                         let mut monitors = HashMap::new();
 228                         let mut old_monitors = $old_monitors.latest_monitors.lock().unwrap();
 229                         for (outpoint, (update_id, monitor_ser)) in old_monitors.drain() {
 230                                 monitors.insert(outpoint, <(BlockHash, ChannelMonitor<EnforcingChannelKeys>)>::read(&mut Cursor::new(&monitor_ser)).expect("Failed to read monitor").1);
 231                                 monitor.latest_monitors.lock().unwrap().insert(outpoint, (update_id, monitor_ser));
 232                         }
 233                         let mut monitor_refs = HashMap::new();
 234                         for (outpoint, monitor) in monitors.iter_mut() {
 235                                 monitor_refs.insert(*outpoint, monitor);
 236                         }
 237
 238                         let read_args = ChannelManagerReadArgs {
 239                                 keys_manager,
 240                                 fee_estimator: fee_est.clone(),
 241                                 monitor: monitor.clone(),
 242                                 tx_broadcaster: broadcast.clone(),
 243                                 logger,
 244                                 default_config: config,
 245                                 channel_monitors: &mut monitor_refs,
 246                         };
 247
 248                         (<(BlockHash, ChannelManager<EnforcingChannelKeys, Arc<TestChannelMonitor>, Arc<TestBroadcaster>, Arc<KeyProvider>, Arc<FuzzEstimator>, Arc<dyn Logger>>)>::read(&mut Cursor::new(&$ser.0), read_args).expect("Failed to read manager").1, monitor)
 249                 } }
 250         }
 251
 252         let mut channel_txn = Vec::new();
 253         macro_rules! make_channel {
 254                 ($source: expr, $dest: expr, $chan_id: expr) => { {
 255                         $source.create_channel($dest.get_our_node_id(), 10000000, 42, 0, None).unwrap();
 256                         let open_channel = {
 257                                 let events = $source.get_and_clear_pending_msg_events();
 258                                 assert_eq!(events.len(), 1);
 259                                 if let events::MessageSendEvent::SendOpenChannel { ref msg, .. } = events[0] {
 260                                         msg.clone()
 261                                 } else { panic!("Wrong event type"); }
 262                         };
 263
 264                         $dest.handle_open_channel(&$source.get_our_node_id(), InitFeatures::known(), &open_channel);
 265                         let accept_channel = {
 266                                 let events = $dest.get_and_clear_pending_msg_events();
 267                                 assert_eq!(events.len(), 1);
 268                                 if let events::MessageSendEvent::SendAcceptChannel { ref msg, .. } = events[0] {
 269                                         msg.clone()
 270                                 } else { panic!("Wrong event type"); }
 271                         };
 272
 273                         $source.handle_accept_channel(&$dest.get_our_node_id(), InitFeatures::known(), &accept_channel);
 274                         let funding_output;
 275                         {
 276                                 let events = $source.get_and_clear_pending_events();
 277                                 assert_eq!(events.len(), 1);
 278                                 if let events::Event::FundingGenerationReady { ref temporary_channel_id, ref channel_value_satoshis, ref output_script, .. } = events[0] {
 279                                         let tx = Transaction { version: $chan_id, lock_time: 0, input: Vec::new(), output: vec![TxOut {
 280                                                 value: *channel_value_satoshis, script_pubkey: output_script.clone(),
 281                                         }]};
 282                                         funding_output = OutPoint { txid: tx.txid(), index: 0 };
 283                                         $source.funding_transaction_generated(&temporary_channel_id, funding_output);
 284                                         channel_txn.push(tx);
 285                                 } else { panic!("Wrong event type"); }
 286                         }
 287
 288                         let funding_created = {
 289                                 let events = $source.get_and_clear_pending_msg_events();
 290                                 assert_eq!(events.len(), 1);
 291                                 if let events::MessageSendEvent::SendFundingCreated { ref msg, .. } = events[0] {
 292                                         msg.clone()
 293                                 } else { panic!("Wrong event type"); }
 294                         };
 295                         $dest.handle_funding_created(&$source.get_our_node_id(), &funding_created);
 296
 297                         let funding_signed = {
 298                                 let events = $dest.get_and_clear_pending_msg_events();
 299                                 assert_eq!(events.len(), 1);
 300                                 if let events::MessageSendEvent::SendFundingSigned { ref msg, .. } = events[0] {
 301                                         msg.clone()
 302                                 } else { panic!("Wrong event type"); }
 303                         };
 304                         $source.handle_funding_signed(&$dest.get_our_node_id(), &funding_signed);
 305
 306                         {
 307                                 let events = $source.get_and_clear_pending_events();
 308                                 assert_eq!(events.len(), 1);
 309                                 if let events::Event::FundingBroadcastSafe { .. } = events[0] {
 310                                 } else { panic!("Wrong event type"); }
 311                         }
 312                         funding_output
 313                 } }
 314         }
 315
 316         macro_rules! confirm_txn {
 317                 ($node: expr) => { {
 318                         let mut header = BlockHeader { version: 0x20000000, prev_blockhash: Default::default(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
 319                         let mut txn = Vec::with_capacity(channel_txn.len());
 320                         let mut posn = Vec::with_capacity(channel_txn.len());
 321                         for i in 0..channel_txn.len() {
 322                                 txn.push(&channel_txn[i]);
 323                                 posn.push(i + 1);
 324                         }
 325                         $node.block_connected(&header, 1, &txn, &posn);
 326                         for i in 2..100 {
 327                                 header = BlockHeader { version: 0x20000000, prev_blockhash: header.bitcoin_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
 328                                 $node.block_connected(&header, i, &Vec::new(), &[0; 0]);
 329                         }
 330                 } }
 331         }
 332
 333         macro_rules! lock_fundings {
 334                 ($nodes: expr) => { {
 335                         let mut node_events = Vec::new();
 336                         for node in $nodes.iter() {
 337                                 node_events.push(node.get_and_clear_pending_msg_events());
 338                         }
 339                         for (idx, node_event) in node_events.iter().enumerate() {
 340                                 for event in node_event {
 341                                         if let events::MessageSendEvent::SendFundingLocked { ref node_id, ref msg } = event {
 342                                                 for node in $nodes.iter() {
 343                                                         if node.get_our_node_id() == *node_id {
 344                                                                 node.handle_funding_locked(&$nodes[idx].get_our_node_id(), msg);
 345                                                         }
 346                                                 }
 347                                         } else { panic!("Wrong event type"); }
 348                                 }
 349                         }
 350
 351                         for node in $nodes.iter() {
 352                                 let events = node.get_and_clear_pending_msg_events();
 353                                 for event in events {
 354                                         if let events::MessageSendEvent::SendAnnouncementSignatures { .. } = event {
 355                                         } else { panic!("Wrong event type"); }
 356                                 }
 357                         }
 358                 } }
 359         }
 360
 361         // 3 nodes is enough to hit all the possible cases, notably unknown-source-unknown-dest
 362         // forwarding.
 363         let (mut node_a, mut monitor_a) = make_node!(0);
 364         let (mut node_b, mut monitor_b) = make_node!(1);
 365         let (mut node_c, mut monitor_c) = make_node!(2);
 366
 367         let mut nodes = [node_a, node_b, node_c];
 368
 369         let chan_1_funding = make_channel!(nodes[0], nodes[1], 0);
 370         let chan_2_funding = make_channel!(nodes[1], nodes[2], 1);
 371
 372         for node in nodes.iter() {
 373                 confirm_txn!(node);
 374         }
 375
 376         lock_fundings!(nodes);
 377
 378         let chan_a = nodes[0].list_usable_channels()[0].short_channel_id.unwrap();
 379         let chan_b = nodes[2].list_usable_channels()[0].short_channel_id.unwrap();
 380
 381         let mut payment_id = 0;
 382
 383         let mut chan_a_disconnected = false;
 384         let mut chan_b_disconnected = false;
 385         let mut ba_events = Vec::new();
 386         let mut bc_events = Vec::new();
 387
 388         let mut node_a_ser = VecWriter(Vec::new());
 389         nodes[0].write(&mut node_a_ser).unwrap();
 390         let mut node_b_ser = VecWriter(Vec::new());
 391         nodes[1].write(&mut node_b_ser).unwrap();
 392         let mut node_c_ser = VecWriter(Vec::new());
 393         nodes[2].write(&mut node_c_ser).unwrap();
 394
 395         macro_rules! test_return {
 396                 () => { {
 397                         assert_eq!(nodes[0].list_channels().len(), 1);
 398                         assert_eq!(nodes[1].list_channels().len(), 2);
 399                         assert_eq!(nodes[2].list_channels().len(), 1);
 400                         return;
 401                 } }
 402         }
 403
 404         let mut read_pos = 0;
 405         macro_rules! get_slice {
 406                 ($len: expr) => {
 407                         {
 408                                 let slice_len = $len as usize;
 409                                 if data.len() < read_pos + slice_len {
 410                                         test_return!();
 411                                 }
 412                                 read_pos += slice_len;
 413                                 &data[read_pos - slice_len..read_pos]
 414                         }
 415                 }
 416         }
 417
 418         loop {
 419                 macro_rules! send_payment {
 420                         ($source: expr, $dest: expr, $amt: expr) => { {
 421                                 let payment_hash = Sha256::hash(&[payment_id; 1]);
 422                                 payment_id = payment_id.wrapping_add(1);
 423                                 if let Err(_) = $source.send_payment(&Route {
 424                                         paths: vec![vec![RouteHop {
 425                                                 pubkey: $dest.0.get_our_node_id(),
 426                                                 node_features: NodeFeatures::empty(),
 427                                                 short_channel_id: $dest.1,
 428                                                 channel_features: ChannelFeatures::empty(),
 429                                                 fee_msat: $amt,
 430                                                 cltv_expiry_delta: 200,
 431                                         }]],
 432                                 }, PaymentHash(payment_hash.into_inner()), &None) {
 433                                         // Probably ran out of funds
 434                                         test_return!();
 435                                 }
 436                         } };
 437                         ($source: expr, $middle: expr, $dest: expr, $amt: expr) => { {
 438                                 let payment_hash = Sha256::hash(&[payment_id; 1]);
 439                                 payment_id = payment_id.wrapping_add(1);
 440                                 if let Err(_) = $source.send_payment(&Route {
 441                                         paths: vec![vec![RouteHop {
 442                                                 pubkey: $middle.0.get_our_node_id(),
 443                                                 node_features: NodeFeatures::empty(),
 444                                                 short_channel_id: $middle.1,
 445                                                 channel_features: ChannelFeatures::empty(),
 446                                                 fee_msat: 50000,
 447                                                 cltv_expiry_delta: 100,
 448                                         },RouteHop {
 449                                                 pubkey: $dest.0.get_our_node_id(),
 450                                                 node_features: NodeFeatures::empty(),
 451                                                 short_channel_id: $dest.1,
 452                                                 channel_features: ChannelFeatures::empty(),
 453                                                 fee_msat: $amt,
 454                                                 cltv_expiry_delta: 200,
 455                                         }]],
 456                                 }, PaymentHash(payment_hash.into_inner()), &None) {
 457                                         // Probably ran out of funds
 458                                         test_return!();
 459                                 }
 460                         } }
 461                 }
 462                 macro_rules! send_payment_with_secret {
 463                         ($source: expr, $middle: expr, $dest: expr) => { {
 464                                 let payment_hash = Sha256::hash(&[payment_id; 1]);
 465                                 payment_id = payment_id.wrapping_add(1);
 466                                 let payment_secret = Sha256::hash(&[payment_id; 1]);
 467                                 payment_id = payment_id.wrapping_add(1);
 468                                 if let Err(_) = $source.send_payment(&Route {
 469                                         paths: vec![vec![RouteHop {
 470                                                 pubkey: $middle.0.get_our_node_id(),
 471                                                 node_features: NodeFeatures::empty(),
 472                                                 short_channel_id: $middle.1,
 473                                                 channel_features: ChannelFeatures::empty(),
 474                                                 fee_msat: 50000,
 475                                                 cltv_expiry_delta: 100,
 476                                         },RouteHop {
 477                                                 pubkey: $dest.0.get_our_node_id(),
 478                                                 node_features: NodeFeatures::empty(),
 479                                                 short_channel_id: $dest.1,
 480                                                 channel_features: ChannelFeatures::empty(),
 481                                                 fee_msat: 5000000,
 482                                                 cltv_expiry_delta: 200,
 483                                         }],vec![RouteHop {
 484                                                 pubkey: $middle.0.get_our_node_id(),
 485                                                 node_features: NodeFeatures::empty(),
 486                                                 short_channel_id: $middle.1,
 487                                                 channel_features: ChannelFeatures::empty(),
 488                                                 fee_msat: 50000,
 489                                                 cltv_expiry_delta: 100,
 490                                         },RouteHop {
 491                                                 pubkey: $dest.0.get_our_node_id(),
 492                                                 node_features: NodeFeatures::empty(),
 493                                                 short_channel_id: $dest.1,
 494                                                 channel_features: ChannelFeatures::empty(),
 495                                                 fee_msat: 5000000,
 496                                                 cltv_expiry_delta: 200,
 497                                         }]],
 498                                 }, PaymentHash(payment_hash.into_inner()), &Some(PaymentSecret(payment_secret.into_inner()))) {
 499                                         // Probably ran out of funds
 500                                         test_return!();
 501                                 }
 502                         } }
 503                 }
 504
 505                 macro_rules! process_msg_events {
 506                         ($node: expr, $corrupt_forward: expr) => { {
 507                                 let events = if $node == 1 {
 508                                         let mut new_events = Vec::new();
 509                                         mem::swap(&mut new_events, &mut ba_events);
 510                                         new_events.extend_from_slice(&bc_events[..]);
 511                                         bc_events.clear();
 512                                         new_events
 513                                 } else { Vec::new() };
 514                                 for event in events.iter().chain(nodes[$node].get_and_clear_pending_msg_events().iter()) {
 515                                         match event {
 516                                                 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 } } => {
 517                                                         for dest in nodes.iter() {
 518                                                                 if dest.get_our_node_id() == *node_id {
 519                                                                         assert!(update_fee.is_none());
 520                                                                         for update_add in update_add_htlcs {
 521                                                                                 if !$corrupt_forward {
 522                                                                                         dest.handle_update_add_htlc(&nodes[$node].get_our_node_id(), &update_add);
 523                                                                                 } else {
 524                                                                                         // Corrupt the update_add_htlc message so that its HMAC
 525                                                                                         // check will fail and we generate a
 526                                                                                         // update_fail_malformed_htlc instead of an
 527                                                                                         // update_fail_htlc as we do when we reject a payment.
 528                                                                                         let mut msg_ser = update_add.encode();
 529                                                                                         msg_ser[1000] ^= 0xff;
 530                                                                                         let new_msg = UpdateAddHTLC::read(&mut Cursor::new(&msg_ser)).unwrap();
 531                                                                                         dest.handle_update_add_htlc(&nodes[$node].get_our_node_id(), &new_msg);
 532                                                                                 }
 533                                                                         }
 534                                                                         for update_fulfill in update_fulfill_htlcs {
 535                                                                                 dest.handle_update_fulfill_htlc(&nodes[$node].get_our_node_id(), &update_fulfill);
 536                                                                         }
 537                                                                         for update_fail in update_fail_htlcs {
 538                                                                                 dest.handle_update_fail_htlc(&nodes[$node].get_our_node_id(), &update_fail);
 539                                                                         }
 540                                                                         for update_fail_malformed in update_fail_malformed_htlcs {
 541                                                                                 dest.handle_update_fail_malformed_htlc(&nodes[$node].get_our_node_id(), &update_fail_malformed);
 542                                                                         }
 543                                                                         dest.handle_commitment_signed(&nodes[$node].get_our_node_id(), &commitment_signed);
 544                                                                 }
 545                                                         }
 546                                                 },
 547                                                 events::MessageSendEvent::SendRevokeAndACK { ref node_id, ref msg } => {
 548                                                         for dest in nodes.iter() {
 549                                                                 if dest.get_our_node_id() == *node_id {
 550                                                                         dest.handle_revoke_and_ack(&nodes[$node].get_our_node_id(), msg);
 551                                                                 }
 552                                                         }
 553                                                 },
 554                                                 events::MessageSendEvent::SendChannelReestablish { ref node_id, ref msg } => {
 555                                                         for dest in nodes.iter() {
 556                                                                 if dest.get_our_node_id() == *node_id {
 557                                                                         dest.handle_channel_reestablish(&nodes[$node].get_our_node_id(), msg);
 558                                                                 }
 559                                                         }
 560                                                 },
 561                                                 events::MessageSendEvent::SendFundingLocked { .. } => {
 562                                                         // Can be generated as a reestablish response
 563                                                 },
 564                                                 events::MessageSendEvent::PaymentFailureNetworkUpdate { .. } => {
 565                                                         // Can be generated due to a payment forward being rejected due to a
 566                                                         // channel having previously failed a monitor update
 567                                                 },
 568                                                 events::MessageSendEvent::HandleError { action: ErrorAction::IgnoreError, .. } => {
 569                                                         // Can be generated at any processing step to send back an error, disconnect
 570                                                         // peer or just ignore
 571                                                 },
 572                                                 _ => panic!("Unhandled message event"),
 573                                         }
 574                                 }
 575                         } }
 576                 }
 577
 578                 macro_rules! drain_msg_events_on_disconnect {
 579                         ($counterparty_id: expr) => { {
 580                                 if $counterparty_id == 0 {
 581                                         for event in nodes[0].get_and_clear_pending_msg_events() {
 582                                                 match event {
 583                                                         events::MessageSendEvent::UpdateHTLCs { .. } => {},
 584                                                         events::MessageSendEvent::SendRevokeAndACK { .. } => {},
 585                                                         events::MessageSendEvent::SendChannelReestablish { .. } => {},
 586                                                         events::MessageSendEvent::SendFundingLocked { .. } => {},
 587                                                         events::MessageSendEvent::PaymentFailureNetworkUpdate { .. } => {},
 588                                                         events::MessageSendEvent::HandleError { action: ErrorAction::IgnoreError, .. } => {},
 589                                                         _ => panic!("Unhandled message event"),
 590                                                 }
 591                                         }
 592                                         ba_events.clear();
 593                                 } else {
 594                                         for event in nodes[2].get_and_clear_pending_msg_events() {
 595                                                 match event {
 596                                                         events::MessageSendEvent::UpdateHTLCs { .. } => {},
 597                                                         events::MessageSendEvent::SendRevokeAndACK { .. } => {},
 598                                                         events::MessageSendEvent::SendChannelReestablish { .. } => {},
 599                                                         events::MessageSendEvent::SendFundingLocked { .. } => {},
 600                                                         events::MessageSendEvent::PaymentFailureNetworkUpdate { .. } => {},
 601                                                         events::MessageSendEvent::HandleError { action: ErrorAction::IgnoreError, .. } => {},
 602                                                         _ => panic!("Unhandled message event"),
 603                                                 }
 604                                         }
 605                                         bc_events.clear();
 606                                 }
 607                                 let mut events = nodes[1].get_and_clear_pending_msg_events();
 608                                 let drop_node_id = if $counterparty_id == 0 { nodes[0].get_our_node_id() } else { nodes[2].get_our_node_id() };
 609                                 let msg_sink = if $counterparty_id == 0 { &mut bc_events } else { &mut ba_events };
 610                                 for event in events.drain(..) {
 611                                         let push = match event {
 612                                                 events::MessageSendEvent::UpdateHTLCs { ref node_id, .. } => {
 613                                                         if *node_id != drop_node_id { true } else { false }
 614                                                 },
 615                                                 events::MessageSendEvent::SendRevokeAndACK { ref node_id, .. } => {
 616                                                         if *node_id != drop_node_id { true } else { false }
 617                                                 },
 618                                                 events::MessageSendEvent::SendChannelReestablish { ref node_id, .. } => {
 619                                                         if *node_id != drop_node_id { true } else { false }
 620                                                 },
 621                                                 events::MessageSendEvent::SendFundingLocked { .. } => false,
 622                                                 events::MessageSendEvent::PaymentFailureNetworkUpdate { .. } => false,
 623                                                 events::MessageSendEvent::HandleError { action: ErrorAction::IgnoreError, .. } => false,
 624                                                 _ => panic!("Unhandled message event"),
 625                                         };
 626                                         if push { msg_sink.push(event); }
 627                                 }
 628                         } }
 629                 }
 630
 631                 macro_rules! process_events {
 632                         ($node: expr, $fail: expr) => { {
 633                                 // In case we get 256 payments we may have a hash collision, resulting in the
 634                                 // second claim/fail call not finding the duplicate-hash HTLC, so we have to
 635                                 // deduplicate the calls here.
 636                                 let mut claim_set = HashSet::new();
 637                                 let mut events = nodes[$node].get_and_clear_pending_events();
 638                                 // Sort events so that PendingHTLCsForwardable get processed last. This avoids a
 639                                 // case where we first process a PendingHTLCsForwardable, then claim/fail on a
 640                                 // PaymentReceived, claiming/failing two HTLCs, but leaving a just-generated
 641                                 // PaymentReceived event for the second HTLC in our pending_events (and breaking
 642                                 // our claim_set deduplication).
 643                                 events.sort_by(|a, b| {
 644                                         if let events::Event::PaymentReceived { .. } = a {
 645                                                 if let events::Event::PendingHTLCsForwardable { .. } = b {
 646                                                         Ordering::Less
 647                                                 } else { Ordering::Equal }
 648                                         } else if let events::Event::PendingHTLCsForwardable { .. } = a {
 649                                                 if let events::Event::PaymentReceived { .. } = b {
 650                                                         Ordering::Greater
 651                                                 } else { Ordering::Equal }
 652                                         } else { Ordering::Equal }
 653                                 });
 654                                 for event in events.drain(..) {
 655                                         match event {
 656                                                 events::Event::PaymentReceived { payment_hash, payment_secret, amt } => {
 657                                                         if claim_set.insert(payment_hash.0) {
 658                                                                 if $fail {
 659                                                                         assert!(nodes[$node].fail_htlc_backwards(&payment_hash, &payment_secret));
 660                                                                 } else {
 661                                                                         assert!(nodes[$node].claim_funds(PaymentPreimage(payment_hash.0), &payment_secret, amt));
 662                                                                 }
 663                                                         }
 664                                                 },
 665                                                 events::Event::PaymentSent { .. } => {},
 666                                                 events::Event::PaymentFailed { .. } => {},
 667                                                 events::Event::PendingHTLCsForwardable { .. } => {
 668                                                         nodes[$node].process_pending_htlc_forwards();
 669                                                 },
 670                                                 _ => panic!("Unhandled event"),
 671                                         }
 672                                 }
 673                         } }
 674                 }
 675
 676                 match get_slice!(1)[0] {
 677                         0x00 => *monitor_a.update_ret.lock().unwrap() = Err(ChannelMonitorUpdateErr::TemporaryFailure),
 678                         0x01 => *monitor_b.update_ret.lock().unwrap() = Err(ChannelMonitorUpdateErr::TemporaryFailure),
 679                         0x02 => *monitor_c.update_ret.lock().unwrap() = Err(ChannelMonitorUpdateErr::TemporaryFailure),
 680                         0x03 => *monitor_a.update_ret.lock().unwrap() = Ok(()),
 681                         0x04 => *monitor_b.update_ret.lock().unwrap() = Ok(()),
 682                         0x05 => *monitor_c.update_ret.lock().unwrap() = Ok(()),
 683                         0x06 => {
 684                                 if let Some((id, _)) = monitor_a.latest_monitors.lock().unwrap().get(&chan_1_funding) {
 685                                         nodes[0].channel_monitor_updated(&chan_1_funding, *id);
 686                                 }
 687                         },
 688                         0x07 => {
 689                                 if let Some((id, _)) = monitor_b.latest_monitors.lock().unwrap().get(&chan_1_funding) {
 690                                         nodes[1].channel_monitor_updated(&chan_1_funding, *id);
 691                                 }
 692                         },
 693                         0x24 => {
 694                                 if let Some((id, _)) = monitor_b.latest_monitors.lock().unwrap().get(&chan_2_funding) {
 695                                         nodes[1].channel_monitor_updated(&chan_2_funding, *id);
 696                                 }
 697                         },
 698                         0x08 => {
 699                                 if let Some((id, _)) = monitor_c.latest_monitors.lock().unwrap().get(&chan_2_funding) {
 700                                         nodes[2].channel_monitor_updated(&chan_2_funding, *id);
 701                                 }
 702                         },
 703                         0x09 => send_payment!(nodes[0], (&nodes[1], chan_a), 5_000_000),
 704                         0x0a => send_payment!(nodes[1], (&nodes[0], chan_a), 5_000_000),
 705                         0x0b => send_payment!(nodes[1], (&nodes[2], chan_b), 5_000_000),
 706                         0x0c => send_payment!(nodes[2], (&nodes[1], chan_b), 5_000_000),
 707                         0x0d => send_payment!(nodes[0], (&nodes[1], chan_a), (&nodes[2], chan_b), 5_000_000),
 708                         0x0e => send_payment!(nodes[2], (&nodes[1], chan_b), (&nodes[0], chan_a), 5_000_000),
 709                         0x0f => {
 710                                 if !chan_a_disconnected {
 711                                         nodes[0].peer_disconnected(&nodes[1].get_our_node_id(), false);
 712                                         nodes[1].peer_disconnected(&nodes[0].get_our_node_id(), false);
 713                                         chan_a_disconnected = true;
 714                                         drain_msg_events_on_disconnect!(0);
 715                                 }
 716                         },
 717                         0x10 => {
 718                                 if !chan_b_disconnected {
 719                                         nodes[1].peer_disconnected(&nodes[2].get_our_node_id(), false);
 720                                         nodes[2].peer_disconnected(&nodes[1].get_our_node_id(), false);
 721                                         chan_b_disconnected = true;
 722                                         drain_msg_events_on_disconnect!(2);
 723                                 }
 724                         },
 725                         0x11 => {
 726                                 if chan_a_disconnected {
 727                                         nodes[0].peer_connected(&nodes[1].get_our_node_id(), &Init { features: InitFeatures::empty() });
 728                                         nodes[1].peer_connected(&nodes[0].get_our_node_id(), &Init { features: InitFeatures::empty() });
 729                                         chan_a_disconnected = false;
 730                                 }
 731                         },
 732                         0x12 => {
 733                                 if chan_b_disconnected {
 734                                         nodes[1].peer_connected(&nodes[2].get_our_node_id(), &Init { features: InitFeatures::empty() });
 735                                         nodes[2].peer_connected(&nodes[1].get_our_node_id(), &Init { features: InitFeatures::empty() });
 736                                         chan_b_disconnected = false;
 737                                 }
 738                         },
 739                         0x13 => process_msg_events!(0, true),
 740                         0x14 => process_msg_events!(0, false),
 741                         0x15 => process_events!(0, true),
 742                         0x16 => process_events!(0, false),
 743                         0x17 => process_msg_events!(1, true),
 744                         0x18 => process_msg_events!(1, false),
 745                         0x19 => process_events!(1, true),
 746                         0x1a => process_events!(1, false),
 747                         0x1b => process_msg_events!(2, true),
 748                         0x1c => process_msg_events!(2, false),
 749                         0x1d => process_events!(2, true),
 750                         0x1e => process_events!(2, false),
 751                         0x1f => {
 752                                 if !chan_a_disconnected {
 753                                         nodes[1].peer_disconnected(&nodes[0].get_our_node_id(), false);
 754                                         chan_a_disconnected = true;
 755                                         drain_msg_events_on_disconnect!(0);
 756                                 }
 757                                 let (new_node_a, new_monitor_a) = reload_node!(node_a_ser, 0, monitor_a);
 758                                 node_a = Arc::new(new_node_a);
 759                                 nodes[0] = node_a.clone();
 760                                 monitor_a = new_monitor_a;
 761                         },
 762                         0x20 => {
 763                                 if !chan_a_disconnected {
 764                                         nodes[0].peer_disconnected(&nodes[1].get_our_node_id(), false);
 765                                         chan_a_disconnected = true;
 766                                         nodes[0].get_and_clear_pending_msg_events();
 767                                         ba_events.clear();
 768                                 }
 769                                 if !chan_b_disconnected {
 770                                         nodes[2].peer_disconnected(&nodes[1].get_our_node_id(), false);
 771                                         chan_b_disconnected = true;
 772                                         nodes[2].get_and_clear_pending_msg_events();
 773                                         bc_events.clear();
 774                                 }
 775                                 let (new_node_b, new_monitor_b) = reload_node!(node_b_ser, 1, monitor_b);
 776                                 node_b = Arc::new(new_node_b);
 777                                 nodes[1] = node_b.clone();
 778                                 monitor_b = new_monitor_b;
 779                         },
 780                         0x21 => {
 781                                 if !chan_b_disconnected {
 782                                         nodes[1].peer_disconnected(&nodes[2].get_our_node_id(), false);
 783                                         chan_b_disconnected = true;
 784                                         drain_msg_events_on_disconnect!(2);
 785                                 }
 786                                 let (new_node_c, new_monitor_c) = reload_node!(node_c_ser, 2, monitor_c);
 787                                 node_c = Arc::new(new_node_c);
 788                                 nodes[2] = node_c.clone();
 789                                 monitor_c = new_monitor_c;
 790                         },
 791                         0x22 => send_payment_with_secret!(nodes[0], (&nodes[1], chan_a), (&nodes[2], chan_b)),
 792                         0x23 => send_payment_with_secret!(nodes[2], (&nodes[1], chan_b), (&nodes[0], chan_a)),
 793                         0x25 => send_payment!(nodes[0], (&nodes[1], chan_a), 10),
 794                         0x26 => send_payment!(nodes[1], (&nodes[0], chan_a), 10),
 795                         0x27 => send_payment!(nodes[1], (&nodes[2], chan_b), 10),
 796                         0x28 => send_payment!(nodes[2], (&nodes[1], chan_b), 10),
 797                         0x29 => send_payment!(nodes[0], (&nodes[1], chan_a), (&nodes[2], chan_b), 10),
 798                         0x2a => send_payment!(nodes[2], (&nodes[1], chan_b), (&nodes[0], chan_a), 10),
 799                         0x2b => send_payment!(nodes[0], (&nodes[1], chan_a), 1_000),
 800                         0x2c => send_payment!(nodes[1], (&nodes[0], chan_a), 1_000),
 801                         0x2d => send_payment!(nodes[1], (&nodes[2], chan_b), 1_000),
 802                         0x2e => send_payment!(nodes[2], (&nodes[1], chan_b), 1_000),
 803                         0x2f => send_payment!(nodes[0], (&nodes[1], chan_a), (&nodes[2], chan_b), 1_000),
 804                         0x30 => send_payment!(nodes[2], (&nodes[1], chan_b), (&nodes[0], chan_a), 1_000),
 805                         0x31 => send_payment!(nodes[0], (&nodes[1], chan_a), 100_000),
 806                         0x32 => send_payment!(nodes[1], (&nodes[0], chan_a), 100_000),
 807                         0x33 => send_payment!(nodes[1], (&nodes[2], chan_b), 100_000),
 808                         0x34 => send_payment!(nodes[2], (&nodes[1], chan_b), 100_000),
 809                         0x35 => send_payment!(nodes[0], (&nodes[1], chan_a), (&nodes[2], chan_b), 100_000),
 810                         0x36 => send_payment!(nodes[2], (&nodes[1], chan_b), (&nodes[0], chan_a), 100_000),
 811                         // 0x24 defined above
 812                         _ => test_return!(),
 813                 }
 814
 815                 node_a_ser.0.clear();
 816                 nodes[0].write(&mut node_a_ser).unwrap();
 817                 monitor_a.should_update_manager.store(false, atomic::Ordering::Relaxed);
 818                 node_b_ser.0.clear();
 819                 nodes[1].write(&mut node_b_ser).unwrap();
 820                 monitor_b.should_update_manager.store(false, atomic::Ordering::Relaxed);
 821                 node_c_ser.0.clear();
 822                 nodes[2].write(&mut node_c_ser).unwrap();
 823                 monitor_c.should_update_manager.store(false, atomic::Ordering::Relaxed);
 824         }
 825 }
 826
 827 pub fn chanmon_consistency_test<Out: test_logger::Output>(data: &[u8], out: Out) {
 828         do_test(data, out);
 829 }
 830
 831 #[no_mangle]
 832 pub extern "C" fn chanmon_consistency_run(data: *const u8, datalen: usize) {
 833         do_test(unsafe { std::slice::from_raw_parts(data, datalen) }, test_logger::DevNull{});
 834 }