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

   1 //! Test that monitor update failures don't get our channel state out of sync.
   2 //! One of the biggest concern with the monitor update failure handling code is that messages
   3 //! resent after monitor updating is restored are delivered out-of-order, resulting in
   4 //! commitment_signed messages having "invalid signatures".
   5 //! To test this we stand up a network of three nodes and read bytes from the fuzz input to denote
   6 //! actions such as sending payments, handling events, or changing monitor update return values on
   7 //! a per-node basis. This should allow it to find any cases where the ordering of actions results
   8 //! in us getting out of sync with ourselves, and, assuming at least one of our recieve- or
   9 //! send-side handling is correct, other peers. We consider it a failure if any action results in a
  10 //! channel being force-closed.
  11
  12 use bitcoin::BitcoinHash;
  13 use bitcoin::blockdata::block::BlockHeader;
  14 use bitcoin::blockdata::transaction::{Transaction, TxOut};
  15 use bitcoin::blockdata::script::{Builder, Script};
  16 use bitcoin::blockdata::opcodes;
  17 use bitcoin::network::constants::Network;
  18
  19 use bitcoin_hashes::Hash as TraitImport;
  20 use bitcoin_hashes::hash160::Hash as Hash160;
  21 use bitcoin_hashes::sha256::Hash as Sha256;
  22 use bitcoin_hashes::sha256d::Hash as Sha256d;
  23
  24 use lightning::chain::chaininterface;
  25 use lightning::chain::transaction::OutPoint;
  26 use lightning::chain::chaininterface::{BroadcasterInterface,ConfirmationTarget,ChainListener,FeeEstimator,ChainWatchInterfaceUtil};
  27 use lightning::chain::keysinterface::{ChannelKeys, KeysInterface};
  28 use lightning::ln::channelmonitor;
  29 use lightning::ln::channelmonitor::{ChannelMonitor, ChannelMonitorUpdateErr, HTLCUpdate};
  30 use lightning::ln::channelmanager::{ChannelManager, PaymentHash, PaymentPreimage, ChannelManagerReadArgs};
  31 use lightning::ln::router::{Route, RouteHop};
  32 use lightning::ln::msgs::{CommitmentUpdate, ChannelMessageHandler, ErrorAction, LightningError, UpdateAddHTLC, LocalFeatures};
  33 use lightning::util::events;
  34 use lightning::util::logger::Logger;
  35 use lightning::util::config::UserConfig;
  36 use lightning::util::events::{EventsProvider, MessageSendEventsProvider};
  37 use lightning::util::ser::{Readable, ReadableArgs, Writeable, Writer};
  38
  39 use utils::test_logger;
  40
  41 use secp256k1::key::{PublicKey,SecretKey};
  42 use secp256k1::Secp256k1;
  43
  44 use std::mem;
  45 use std::cmp::Ordering;
  46 use std::collections::{HashSet, hash_map, HashMap};
  47 use std::sync::{Arc,Mutex};
  48 use std::sync::atomic;
  49 use std::io::Cursor;
  50
  51 struct FuzzEstimator {}
  52 impl FeeEstimator for FuzzEstimator {
  53         fn get_est_sat_per_1000_weight(&self, _: ConfirmationTarget) -> u64 {
  54                 253
  55         }
  56 }
  57
  58 pub struct TestBroadcaster {}
  59 impl BroadcasterInterface for TestBroadcaster {
  60         fn broadcast_transaction(&self, _tx: &Transaction) { }
  61 }
  62
  63 pub struct VecWriter(pub Vec<u8>);
  64 impl Writer for VecWriter {
  65         fn write_all(&mut self, buf: &[u8]) -> Result<(), ::std::io::Error> {
  66                 self.0.extend_from_slice(buf);
  67                 Ok(())
  68         }
  69         fn size_hint(&mut self, size: usize) {
  70                 self.0.reserve_exact(size);
  71         }
  72 }
  73
  74 static mut IN_RESTORE: bool = false;
  75 pub struct TestChannelMonitor {
  76         pub simple_monitor: Arc<channelmonitor::SimpleManyChannelMonitor<OutPoint>>,
  77         pub update_ret: Mutex<Result<(), channelmonitor::ChannelMonitorUpdateErr>>,
  78         pub latest_good_update: Mutex<HashMap<OutPoint, Vec<u8>>>,
  79         pub latest_update_good: Mutex<HashMap<OutPoint, bool>>,
  80         pub latest_updates_good_at_last_ser: Mutex<HashMap<OutPoint, bool>>,
  81         pub should_update_manager: atomic::AtomicBool,
  82 }
  83 impl TestChannelMonitor {
  84         pub fn new(chain_monitor: Arc<dyn chaininterface::ChainWatchInterface>, broadcaster: Arc<dyn chaininterface::BroadcasterInterface>, logger: Arc<dyn Logger>, feeest: Arc<dyn chaininterface::FeeEstimator>) -> Self {
  85                 Self {
  86                         simple_monitor: channelmonitor::SimpleManyChannelMonitor::new(chain_monitor, broadcaster, logger, feeest),
  87                         update_ret: Mutex::new(Ok(())),
  88                         latest_good_update: Mutex::new(HashMap::new()),
  89                         latest_update_good: Mutex::new(HashMap::new()),
  90                         latest_updates_good_at_last_ser: Mutex::new(HashMap::new()),
  91                         should_update_manager: atomic::AtomicBool::new(false),
  92                 }
  93         }
  94 }
  95 impl channelmonitor::ManyChannelMonitor for TestChannelMonitor {
  96         fn add_update_monitor(&self, funding_txo: OutPoint, monitor: channelmonitor::ChannelMonitor) -> Result<(), channelmonitor::ChannelMonitorUpdateErr> {
  97                 let ret = self.update_ret.lock().unwrap().clone();
  98                 if let Ok(()) = ret {
  99                         let mut ser = VecWriter(Vec::new());
 100                         monitor.write_for_disk(&mut ser).unwrap();
 101                         self.latest_good_update.lock().unwrap().insert(funding_txo, ser.0);
 102                         match self.latest_update_good.lock().unwrap().entry(funding_txo) {
 103                                 hash_map::Entry::Vacant(e) => { e.insert(true); },
 104                                 hash_map::Entry::Occupied(mut e) => {
 105                                         if !e.get() && unsafe { IN_RESTORE } {
 106                                                 // Technically we can't consider an update to be "good" unless we're doing
 107                                                 // it in response to a test_restore_channel_monitor as the channel may
 108                                                 // still be waiting on such a call, so only set us to good if we're in the
 109                                                 // middle of a restore call.
 110                                                 e.insert(true);
 111                                         }
 112                                 },
 113                         }
 114                         self.should_update_manager.store(true, atomic::Ordering::Relaxed);
 115                 } else {
 116                         self.latest_update_good.lock().unwrap().insert(funding_txo, false);
 117                 }
 118                 assert!(self.simple_monitor.add_update_monitor(funding_txo, monitor).is_ok());
 119                 ret
 120         }
 121
 122         fn fetch_pending_htlc_updated(&self) -> Vec<HTLCUpdate> {
 123                 return self.simple_monitor.fetch_pending_htlc_updated();
 124         }
 125 }
 126
 127 struct KeyProvider {
 128         node_id: u8,
 129         session_id: atomic::AtomicU8,
 130         channel_id: atomic::AtomicU8,
 131 }
 132 impl KeysInterface for KeyProvider {
 133         fn get_node_secret(&self) -> SecretKey {
 134                 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()
 135         }
 136
 137         fn get_destination_script(&self) -> Script {
 138                 let secp_ctx = Secp256k1::signing_only();
 139                 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();
 140                 let our_channel_monitor_claim_key_hash = Hash160::hash(&PublicKey::from_secret_key(&secp_ctx, &channel_monitor_claim_key).serialize());
 141                 Builder::new().push_opcode(opcodes::all::OP_PUSHBYTES_0).push_slice(&our_channel_monitor_claim_key_hash[..]).into_script()
 142         }
 143
 144         fn get_shutdown_pubkey(&self) -> PublicKey {
 145                 let secp_ctx = Secp256k1::signing_only();
 146                 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())
 147         }
 148
 149         fn get_channel_keys(&self, _inbound: bool) -> ChannelKeys {
 150                 ChannelKeys {
 151                         funding_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, 4, self.node_id]).unwrap(),
 152                         revocation_base_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, 5, self.node_id]).unwrap(),
 153                         payment_base_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, 6, self.node_id]).unwrap(),
 154                         delayed_payment_base_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, 7, self.node_id]).unwrap(),
 155                         htlc_base_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, 8, self.node_id]).unwrap(),
 156                         commitment_seed: [0, 0, 0, 0, 0, 0, 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],
 157                 }
 158         }
 159
 160         fn get_onion_rand(&self) -> (SecretKey, [u8; 32]) {
 161                 let id = self.session_id.fetch_add(1, atomic::Ordering::Relaxed);
 162                 (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(),
 163                 [0; 32])
 164         }
 165
 166         fn get_channel_id(&self) -> [u8; 32] {
 167                 let id = self.channel_id.fetch_add(1, atomic::Ordering::Relaxed);
 168                 [0, 0, 0, 0, 0, 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]
 169         }
 170 }
 171
 172 #[inline]
 173 pub fn do_test(data: &[u8]) {
 174         let fee_est = Arc::new(FuzzEstimator{});
 175         let broadcast = Arc::new(TestBroadcaster{});
 176
 177         macro_rules! make_node {
 178                 ($node_id: expr) => { {
 179                         let logger: Arc<dyn Logger> = Arc::new(test_logger::TestLogger::new($node_id.to_string()));
 180                         let watch = Arc::new(ChainWatchInterfaceUtil::new(Network::Bitcoin, Arc::clone(&logger)));
 181                         let monitor = Arc::new(TestChannelMonitor::new(watch.clone(), broadcast.clone(), logger.clone(), fee_est.clone()));
 182
 183                         let keys_manager = Arc::new(KeyProvider { node_id: $node_id, session_id: atomic::AtomicU8::new(0), channel_id: atomic::AtomicU8::new(0) });
 184                         let mut config = UserConfig::default();
 185                         config.channel_options.fee_proportional_millionths = 0;
 186                         config.channel_options.announced_channel = true;
 187                         config.peer_channel_config_limits.min_dust_limit_satoshis = 0;
 188                         (ChannelManager::new(Network::Bitcoin, fee_est.clone(), monitor.clone(), broadcast.clone(), Arc::clone(&logger), keys_manager.clone(), config, 0).unwrap(),
 189                         monitor)
 190                 } }
 191         }
 192
 193         macro_rules! reload_node {
 194                 ($ser: expr, $node_id: expr, $old_monitors: expr) => { {
 195                         let logger: Arc<dyn Logger> = Arc::new(test_logger::TestLogger::new($node_id.to_string()));
 196                         let watch = Arc::new(ChainWatchInterfaceUtil::new(Network::Bitcoin, Arc::clone(&logger)));
 197                         let monitor = Arc::new(TestChannelMonitor::new(watch.clone(), broadcast.clone(), logger.clone(), fee_est.clone()));
 198
 199                         let keys_manager = Arc::new(KeyProvider { node_id: $node_id, session_id: atomic::AtomicU8::new(0), channel_id: atomic::AtomicU8::new(0) });
 200                         let mut config = UserConfig::default();
 201                         config.channel_options.fee_proportional_millionths = 0;
 202                         config.channel_options.announced_channel = true;
 203                         config.peer_channel_config_limits.min_dust_limit_satoshis = 0;
 204
 205                         let mut monitors = HashMap::new();
 206                         let mut old_monitors = $old_monitors.latest_good_update.lock().unwrap();
 207                         for (outpoint, monitor_ser) in old_monitors.drain() {
 208                                 monitors.insert(outpoint, <(Sha256d, ChannelMonitor)>::read(&mut Cursor::new(&monitor_ser), Arc::clone(&logger)).expect("Failed to read monitor").1);
 209                                 monitor.latest_good_update.lock().unwrap().insert(outpoint, monitor_ser);
 210                         }
 211                         let mut monitor_refs = HashMap::new();
 212                         for (outpoint, monitor) in monitors.iter() {
 213                                 monitor_refs.insert(*outpoint, monitor);
 214                         }
 215
 216                         let read_args = ChannelManagerReadArgs {
 217                                 keys_manager,
 218                                 fee_estimator: fee_est.clone(),
 219                                 monitor: monitor.clone(),
 220                                 tx_broadcaster: broadcast.clone(),
 221                                 logger,
 222                                 default_config: config,
 223                                 channel_monitors: &monitor_refs,
 224                         };
 225
 226                         let res = (<(Sha256d, ChannelManager)>::read(&mut Cursor::new(&$ser.0), read_args).expect("Failed to read manager").1, monitor);
 227                         for (_, was_good) in $old_monitors.latest_updates_good_at_last_ser.lock().unwrap().iter() {
 228                                 if !was_good {
 229                                         // If the last time we updated a monitor we didn't successfully update (and we
 230                                         // have sense updated our serialized copy of the ChannelManager) we may
 231                                         // force-close the channel on our counterparty cause we know we're missing
 232                                         // something. Thus, we just return here since we can't continue to test.
 233                                         return;
 234                                 }
 235                         }
 236                         res
 237                 } }
 238         }
 239
 240         let mut channel_txn = Vec::new();
 241         macro_rules! make_channel {
 242                 ($source: expr, $dest: expr, $chan_id: expr) => { {
 243                         $source.create_channel($dest.get_our_node_id(), 10000000, 42, 0).unwrap();
 244                         let open_channel = {
 245                                 let events = $source.get_and_clear_pending_msg_events();
 246                                 assert_eq!(events.len(), 1);
 247                                 if let events::MessageSendEvent::SendOpenChannel { ref msg, .. } = events[0] {
 248                                         msg.clone()
 249                                 } else { panic!("Wrong event type"); }
 250                         };
 251
 252                         $dest.handle_open_channel(&$source.get_our_node_id(), LocalFeatures::new(), &open_channel).unwrap();
 253                         let accept_channel = {
 254                                 let events = $dest.get_and_clear_pending_msg_events();
 255                                 assert_eq!(events.len(), 1);
 256                                 if let events::MessageSendEvent::SendAcceptChannel { ref msg, .. } = events[0] {
 257                                         msg.clone()
 258                                 } else { panic!("Wrong event type"); }
 259                         };
 260
 261                         $source.handle_accept_channel(&$dest.get_our_node_id(), LocalFeatures::new(), &accept_channel).unwrap();
 262                         {
 263                                 let events = $source.get_and_clear_pending_events();
 264                                 assert_eq!(events.len(), 1);
 265                                 if let events::Event::FundingGenerationReady { ref temporary_channel_id, ref channel_value_satoshis, ref output_script, .. } = events[0] {
 266                                         let tx = Transaction { version: $chan_id, lock_time: 0, input: Vec::new(), output: vec![TxOut {
 267                                                 value: *channel_value_satoshis, script_pubkey: output_script.clone(),
 268                                         }]};
 269                                         let funding_output = OutPoint::new(tx.txid(), 0);
 270                                         $source.funding_transaction_generated(&temporary_channel_id, funding_output);
 271                                         channel_txn.push(tx);
 272                                 } else { panic!("Wrong event type"); }
 273                         }
 274
 275                         let funding_created = {
 276                                 let events = $source.get_and_clear_pending_msg_events();
 277                                 assert_eq!(events.len(), 1);
 278                                 if let events::MessageSendEvent::SendFundingCreated { ref msg, .. } = events[0] {
 279                                         msg.clone()
 280                                 } else { panic!("Wrong event type"); }
 281                         };
 282                         $dest.handle_funding_created(&$source.get_our_node_id(), &funding_created).unwrap();
 283
 284                         let funding_signed = {
 285                                 let events = $dest.get_and_clear_pending_msg_events();
 286                                 assert_eq!(events.len(), 1);
 287                                 if let events::MessageSendEvent::SendFundingSigned { ref msg, .. } = events[0] {
 288                                         msg.clone()
 289                                 } else { panic!("Wrong event type"); }
 290                         };
 291                         $source.handle_funding_signed(&$dest.get_our_node_id(), &funding_signed).unwrap();
 292
 293                         {
 294                                 let events = $source.get_and_clear_pending_events();
 295                                 assert_eq!(events.len(), 1);
 296                                 if let events::Event::FundingBroadcastSafe { .. } = events[0] {
 297                                 } else { panic!("Wrong event type"); }
 298                         }
 299                 } }
 300         }
 301
 302         macro_rules! confirm_txn {
 303                 ($node: expr) => { {
 304                         let mut header = BlockHeader { version: 0x20000000, prev_blockhash: Default::default(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
 305                         let mut txn = Vec::with_capacity(channel_txn.len());
 306                         let mut posn = Vec::with_capacity(channel_txn.len());
 307                         for i in 0..channel_txn.len() {
 308                                 txn.push(&channel_txn[i]);
 309                                 posn.push(i as u32 + 1);
 310                         }
 311                         $node.block_connected(&header, 1, &txn, &posn);
 312                         for i in 2..100 {
 313                                 header = BlockHeader { version: 0x20000000, prev_blockhash: header.bitcoin_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
 314                                 $node.block_connected(&header, i, &Vec::new(), &[0; 0]);
 315                         }
 316                 } }
 317         }
 318
 319         macro_rules! lock_fundings {
 320                 ($nodes: expr) => { {
 321                         let mut node_events = Vec::new();
 322                         for node in $nodes.iter() {
 323                                 node_events.push(node.get_and_clear_pending_msg_events());
 324                         }
 325                         for (idx, node_event) in node_events.iter().enumerate() {
 326                                 for event in node_event {
 327                                         if let events::MessageSendEvent::SendFundingLocked { ref node_id, ref msg } = event {
 328                                                 for node in $nodes.iter() {
 329                                                         if node.get_our_node_id() == *node_id {
 330                                                                 node.handle_funding_locked(&$nodes[idx].get_our_node_id(), msg).unwrap();
 331                                                         }
 332                                                 }
 333                                         } else { panic!("Wrong event type"); }
 334                                 }
 335                         }
 336
 337                         for node in $nodes.iter() {
 338                                 let events = node.get_and_clear_pending_msg_events();
 339                                 for event in events {
 340                                         if let events::MessageSendEvent::SendAnnouncementSignatures { .. } = event {
 341                                         } else { panic!("Wrong event type"); }
 342                                 }
 343                         }
 344                 } }
 345         }
 346
 347         // 3 nodes is enough to hit all the possible cases, notably unknown-source-unknown-dest
 348         // forwarding.
 349         let (mut node_a, mut monitor_a) = make_node!(0);
 350         let (mut node_b, mut monitor_b) = make_node!(1);
 351         let (mut node_c, mut monitor_c) = make_node!(2);
 352
 353         let mut nodes = [node_a, node_b, node_c];
 354
 355         make_channel!(nodes[0], nodes[1], 0);
 356         make_channel!(nodes[1], nodes[2], 1);
 357
 358         for node in nodes.iter() {
 359                 confirm_txn!(node);
 360         }
 361
 362         lock_fundings!(nodes);
 363
 364         let chan_a = nodes[0].list_usable_channels()[0].short_channel_id.unwrap();
 365         let chan_b = nodes[2].list_usable_channels()[0].short_channel_id.unwrap();
 366
 367         let mut payment_id = 0;
 368
 369         let mut chan_a_disconnected = false;
 370         let mut chan_b_disconnected = false;
 371         let mut ba_events = Vec::new();
 372         let mut bc_events = Vec::new();
 373
 374         let mut node_a_ser = VecWriter(Vec::new());
 375         nodes[0].write(&mut node_a_ser).unwrap();
 376         let mut node_b_ser = VecWriter(Vec::new());
 377         nodes[1].write(&mut node_b_ser).unwrap();
 378         let mut node_c_ser = VecWriter(Vec::new());
 379         nodes[2].write(&mut node_c_ser).unwrap();
 380
 381         macro_rules! test_err {
 382                 ($res: expr) => {
 383                         match $res {
 384                                 Ok(()) => {},
 385                                 Err(LightningError { action: ErrorAction::IgnoreError, .. }) => { },
 386                                 _ => { $res.unwrap() },
 387                         }
 388                 }
 389         }
 390
 391         macro_rules! test_return {
 392                 () => { {
 393                         assert_eq!(nodes[0].list_channels().len(), 1);
 394                         assert_eq!(nodes[1].list_channels().len(), 2);
 395                         assert_eq!(nodes[2].list_channels().len(), 1);
 396                         return;
 397                 } }
 398         }
 399
 400         let mut read_pos = 0;
 401         macro_rules! get_slice {
 402                 ($len: expr) => {
 403                         {
 404                                 let slice_len = $len as usize;
 405                                 if data.len() < read_pos + slice_len {
 406                                         test_return!();
 407                                 }
 408                                 read_pos += slice_len;
 409                                 &data[read_pos - slice_len..read_pos]
 410                         }
 411                 }
 412         }
 413
 414         loop {
 415                 macro_rules! send_payment {
 416                         ($source: expr, $dest: expr) => { {
 417                                 let payment_hash = Sha256::hash(&[payment_id; 1]);
 418                                 payment_id = payment_id.wrapping_add(1);
 419                                 if let Err(_) = $source.send_payment(Route {
 420                                         hops: vec![RouteHop {
 421                                                 pubkey: $dest.0.get_our_node_id(),
 422                                                 short_channel_id: $dest.1,
 423                                                 fee_msat: 5000000,
 424                                                 cltv_expiry_delta: 200,
 425                                         }],
 426                                 }, PaymentHash(payment_hash.into_inner())) {
 427                                         // Probably ran out of funds
 428                                         test_return!();
 429                                 }
 430                         } };
 431                         ($source: expr, $middle: expr, $dest: expr) => { {
 432                                 let payment_hash = Sha256::hash(&[payment_id; 1]);
 433                                 payment_id = payment_id.wrapping_add(1);
 434                                 if let Err(_) = $source.send_payment(Route {
 435                                         hops: vec![RouteHop {
 436                                                 pubkey: $middle.0.get_our_node_id(),
 437                                                 short_channel_id: $middle.1,
 438                                                 fee_msat: 50000,
 439                                                 cltv_expiry_delta: 100,
 440                                         },RouteHop {
 441                                                 pubkey: $dest.0.get_our_node_id(),
 442                                                 short_channel_id: $dest.1,
 443                                                 fee_msat: 5000000,
 444                                                 cltv_expiry_delta: 200,
 445                                         }],
 446                                 }, PaymentHash(payment_hash.into_inner())) {
 447                                         // Probably ran out of funds
 448                                         test_return!();
 449                                 }
 450                         } }
 451                 }
 452
 453                 macro_rules! process_msg_events {
 454                         ($node: expr, $corrupt_forward: expr) => { {
 455                                 let events = if $node == 1 {
 456                                         let mut new_events = Vec::new();
 457                                         mem::swap(&mut new_events, &mut ba_events);
 458                                         new_events.extend_from_slice(&bc_events[..]);
 459                                         bc_events.clear();
 460                                         new_events
 461                                 } else { Vec::new() };
 462                                 for event in events.iter().chain(nodes[$node].get_and_clear_pending_msg_events().iter()) {
 463                                         match event {
 464                                                 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 } } => {
 465                                                         for dest in nodes.iter() {
 466                                                                 if dest.get_our_node_id() == *node_id {
 467                                                                         assert!(update_fee.is_none());
 468                                                                         for update_add in update_add_htlcs {
 469                                                                                 if !$corrupt_forward {
 470                                                                                         test_err!(dest.handle_update_add_htlc(&nodes[$node].get_our_node_id(), &update_add));
 471                                                                                 } else {
 472                                                                                         // Corrupt the update_add_htlc message so that its HMAC
 473                                                                                         // check will fail and we generate a
 474                                                                                         // update_fail_malformed_htlc instead of an
 475                                                                                         // update_fail_htlc as we do when we reject a payment.
 476                                                                                         let mut msg_ser = update_add.encode();
 477                                                                                         msg_ser[1000] ^= 0xff;
 478                                                                                         let new_msg = UpdateAddHTLC::read(&mut Cursor::new(&msg_ser)).unwrap();
 479                                                                                         test_err!(dest.handle_update_add_htlc(&nodes[$node].get_our_node_id(), &new_msg));
 480                                                                                 }
 481                                                                         }
 482                                                                         for update_fulfill in update_fulfill_htlcs {
 483                                                                                 test_err!(dest.handle_update_fulfill_htlc(&nodes[$node].get_our_node_id(), &update_fulfill));
 484                                                                         }
 485                                                                         for update_fail in update_fail_htlcs {
 486                                                                                 test_err!(dest.handle_update_fail_htlc(&nodes[$node].get_our_node_id(), &update_fail));
 487                                                                         }
 488                                                                         for update_fail_malformed in update_fail_malformed_htlcs {
 489                                                                                 test_err!(dest.handle_update_fail_malformed_htlc(&nodes[$node].get_our_node_id(), &update_fail_malformed));
 490                                                                         }
 491                                                                         test_err!(dest.handle_commitment_signed(&nodes[$node].get_our_node_id(), &commitment_signed));
 492                                                                 }
 493                                                         }
 494                                                 },
 495                                                 events::MessageSendEvent::SendRevokeAndACK { ref node_id, ref msg } => {
 496                                                         for dest in nodes.iter() {
 497                                                                 if dest.get_our_node_id() == *node_id {
 498                                                                         test_err!(dest.handle_revoke_and_ack(&nodes[$node].get_our_node_id(), msg));
 499                                                                 }
 500                                                         }
 501                                                 },
 502                                                 events::MessageSendEvent::SendChannelReestablish { ref node_id, ref msg } => {
 503                                                         for dest in nodes.iter() {
 504                                                                 if dest.get_our_node_id() == *node_id {
 505                                                                         test_err!(dest.handle_channel_reestablish(&nodes[$node].get_our_node_id(), msg));
 506                                                                 }
 507                                                         }
 508                                                 },
 509                                                 events::MessageSendEvent::SendFundingLocked { .. } => {
 510                                                         // Can be generated as a reestablish response
 511                                                 },
 512                                                 events::MessageSendEvent::PaymentFailureNetworkUpdate { .. } => {
 513                                                         // Can be generated due to a payment forward being rejected due to a
 514                                                         // channel having previously failed a monitor update
 515                                                 },
 516                                                 _ => panic!("Unhandled message event"),
 517                                         }
 518                                 }
 519                         } }
 520                 }
 521
 522                 macro_rules! drain_msg_events_on_disconnect {
 523                         ($counterparty_id: expr) => { {
 524                                 if $counterparty_id == 0 {
 525                                         for event in nodes[0].get_and_clear_pending_msg_events() {
 526                                                 match event {
 527                                                         events::MessageSendEvent::UpdateHTLCs { .. } => {},
 528                                                         events::MessageSendEvent::SendRevokeAndACK { .. } => {},
 529                                                         events::MessageSendEvent::SendChannelReestablish { .. } => {},
 530                                                         events::MessageSendEvent::SendFundingLocked { .. } => {},
 531                                                         events::MessageSendEvent::PaymentFailureNetworkUpdate { .. } => {},
 532                                                         _ => panic!("Unhandled message event"),
 533                                                 }
 534                                         }
 535                                         ba_events.clear();
 536                                 } else {
 537                                         for event in nodes[2].get_and_clear_pending_msg_events() {
 538                                                 match event {
 539                                                         events::MessageSendEvent::UpdateHTLCs { .. } => {},
 540                                                         events::MessageSendEvent::SendRevokeAndACK { .. } => {},
 541                                                         events::MessageSendEvent::SendChannelReestablish { .. } => {},
 542                                                         events::MessageSendEvent::SendFundingLocked { .. } => {},
 543                                                         events::MessageSendEvent::PaymentFailureNetworkUpdate { .. } => {},
 544                                                         _ => panic!("Unhandled message event"),
 545                                                 }
 546                                         }
 547                                         bc_events.clear();
 548                                 }
 549                                 let mut events = nodes[1].get_and_clear_pending_msg_events();
 550                                 let drop_node_id = if $counterparty_id == 0 { nodes[0].get_our_node_id() } else { nodes[2].get_our_node_id() };
 551                                 let msg_sink = if $counterparty_id == 0 { &mut bc_events } else { &mut ba_events };
 552                                 for event in events.drain(..) {
 553                                         let push = match event {
 554                                                 events::MessageSendEvent::UpdateHTLCs { ref node_id, .. } => {
 555                                                         if *node_id != drop_node_id { true } else { false }
 556                                                 },
 557                                                 events::MessageSendEvent::SendRevokeAndACK { ref node_id, .. } => {
 558                                                         if *node_id != drop_node_id { true } else { false }
 559                                                 },
 560                                                 events::MessageSendEvent::SendChannelReestablish { ref node_id, .. } => {
 561                                                         if *node_id != drop_node_id { true } else { false }
 562                                                 },
 563                                                 events::MessageSendEvent::SendFundingLocked { .. } => false,
 564                                                 events::MessageSendEvent::PaymentFailureNetworkUpdate { .. } => false,
 565                                                 _ => panic!("Unhandled message event"),
 566                                         };
 567                                         if push { msg_sink.push(event); }
 568                                 }
 569                         } }
 570                 }
 571
 572                 macro_rules! process_events {
 573                         ($node: expr, $fail: expr) => { {
 574                                 // In case we get 256 payments we may have a hash collision, resulting in the
 575                                 // second claim/fail call not finding the duplicate-hash HTLC, so we have to
 576                                 // deduplicate the calls here.
 577                                 let mut claim_set = HashSet::new();
 578                                 let mut events = nodes[$node].get_and_clear_pending_events();
 579                                 // Sort events so that PendingHTLCsForwardable get processed last. This avoids a
 580                                 // case where we first process a PendingHTLCsForwardable, then claim/fail on a
 581                                 // PaymentReceived, claiming/failing two HTLCs, but leaving a just-generated
 582                                 // PaymentReceived event for the second HTLC in our pending_events (and breaking
 583                                 // our claim_set deduplication).
 584                                 events.sort_by(|a, b| {
 585                                         if let events::Event::PaymentReceived { .. } = a {
 586                                                 if let events::Event::PendingHTLCsForwardable { .. } = b {
 587                                                         Ordering::Less
 588                                                 } else { Ordering::Equal }
 589                                         } else if let events::Event::PendingHTLCsForwardable { .. } = a {
 590                                                 if let events::Event::PaymentReceived { .. } = b {
 591                                                         Ordering::Greater
 592                                                 } else { Ordering::Equal }
 593                                         } else { Ordering::Equal }
 594                                 });
 595                                 for event in events.drain(..) {
 596                                         match event {
 597                                                 events::Event::PaymentReceived { payment_hash, .. } => {
 598                                                         if claim_set.insert(payment_hash.0) {
 599                                                                 if $fail {
 600                                                                         assert!(nodes[$node].fail_htlc_backwards(&payment_hash));
 601                                                                 } else {
 602                                                                         assert!(nodes[$node].claim_funds(PaymentPreimage(payment_hash.0), 5_000_000));
 603                                                                 }
 604                                                         }
 605                                                 },
 606                                                 events::Event::PaymentSent { .. } => {},
 607                                                 events::Event::PaymentFailed { .. } => {},
 608                                                 events::Event::PendingHTLCsForwardable { .. } => {
 609                                                         nodes[$node].process_pending_htlc_forwards();
 610                                                 },
 611                                                 _ => panic!("Unhandled event"),
 612                                         }
 613                                 }
 614                         } }
 615                 }
 616
 617                 match get_slice!(1)[0] {
 618                         0x00 => *monitor_a.update_ret.lock().unwrap() = Err(ChannelMonitorUpdateErr::TemporaryFailure),
 619                         0x01 => *monitor_b.update_ret.lock().unwrap() = Err(ChannelMonitorUpdateErr::TemporaryFailure),
 620                         0x02 => *monitor_c.update_ret.lock().unwrap() = Err(ChannelMonitorUpdateErr::TemporaryFailure),
 621                         0x03 => *monitor_a.update_ret.lock().unwrap() = Ok(()),
 622                         0x04 => *monitor_b.update_ret.lock().unwrap() = Ok(()),
 623                         0x05 => *monitor_c.update_ret.lock().unwrap() = Ok(()),
 624                         0x06 => { unsafe { IN_RESTORE = true }; nodes[0].test_restore_channel_monitor(); unsafe { IN_RESTORE = false }; },
 625                         0x07 => { unsafe { IN_RESTORE = true }; nodes[1].test_restore_channel_monitor(); unsafe { IN_RESTORE = false }; },
 626                         0x08 => { unsafe { IN_RESTORE = true }; nodes[2].test_restore_channel_monitor(); unsafe { IN_RESTORE = false }; },
 627                         0x09 => send_payment!(nodes[0], (&nodes[1], chan_a)),
 628                         0x0a => send_payment!(nodes[1], (&nodes[0], chan_a)),
 629                         0x0b => send_payment!(nodes[1], (&nodes[2], chan_b)),
 630                         0x0c => send_payment!(nodes[2], (&nodes[1], chan_b)),
 631                         0x0d => send_payment!(nodes[0], (&nodes[1], chan_a), (&nodes[2], chan_b)),
 632                         0x0e => send_payment!(nodes[2], (&nodes[1], chan_b), (&nodes[0], chan_a)),
 633                         0x0f => {
 634                                 if !chan_a_disconnected {
 635                                         nodes[0].peer_disconnected(&nodes[1].get_our_node_id(), false);
 636                                         nodes[1].peer_disconnected(&nodes[0].get_our_node_id(), false);
 637                                         chan_a_disconnected = true;
 638                                         drain_msg_events_on_disconnect!(0);
 639                                 }
 640                         },
 641                         0x10 => {
 642                                 if !chan_b_disconnected {
 643                                         nodes[1].peer_disconnected(&nodes[2].get_our_node_id(), false);
 644                                         nodes[2].peer_disconnected(&nodes[1].get_our_node_id(), false);
 645                                         chan_b_disconnected = true;
 646                                         drain_msg_events_on_disconnect!(2);
 647                                 }
 648                         },
 649                         0x11 => {
 650                                 if chan_a_disconnected {
 651                                         nodes[0].peer_connected(&nodes[1].get_our_node_id());
 652                                         nodes[1].peer_connected(&nodes[0].get_our_node_id());
 653                                         chan_a_disconnected = false;
 654                                 }
 655                         },
 656                         0x12 => {
 657                                 if chan_b_disconnected {
 658                                         nodes[1].peer_connected(&nodes[2].get_our_node_id());
 659                                         nodes[2].peer_connected(&nodes[1].get_our_node_id());
 660                                         chan_b_disconnected = false;
 661                                 }
 662                         },
 663                         0x13 => process_msg_events!(0, true),
 664                         0x14 => process_msg_events!(0, false),
 665                         0x15 => process_events!(0, true),
 666                         0x16 => process_events!(0, false),
 667                         0x17 => process_msg_events!(1, true),
 668                         0x18 => process_msg_events!(1, false),
 669                         0x19 => process_events!(1, true),
 670                         0x1a => process_events!(1, false),
 671                         0x1b => process_msg_events!(2, true),
 672                         0x1c => process_msg_events!(2, false),
 673                         0x1d => process_events!(2, true),
 674                         0x1e => process_events!(2, false),
 675                         0x1f => {
 676                                 if !chan_a_disconnected {
 677                                         nodes[1].peer_disconnected(&nodes[0].get_our_node_id(), false);
 678                                         chan_a_disconnected = true;
 679                                         drain_msg_events_on_disconnect!(0);
 680                                 }
 681                                 let (new_node_a, new_monitor_a) = reload_node!(node_a_ser, 0, monitor_a);
 682                                 node_a = Arc::new(new_node_a);
 683                                 nodes[0] = node_a.clone();
 684                                 monitor_a = new_monitor_a;
 685                         },
 686                         0x20 => {
 687                                 if !chan_a_disconnected {
 688                                         nodes[0].peer_disconnected(&nodes[1].get_our_node_id(), false);
 689                                         chan_a_disconnected = true;
 690                                         nodes[0].get_and_clear_pending_msg_events();
 691                                         ba_events.clear();
 692                                 }
 693                                 if !chan_b_disconnected {
 694                                         nodes[2].peer_disconnected(&nodes[1].get_our_node_id(), false);
 695                                         chan_b_disconnected = true;
 696                                         nodes[2].get_and_clear_pending_msg_events();
 697                                         bc_events.clear();
 698                                 }
 699                                 let (new_node_b, new_monitor_b) = reload_node!(node_b_ser, 1, monitor_b);
 700                                 node_b = Arc::new(new_node_b);
 701                                 nodes[1] = node_b.clone();
 702                                 monitor_b = new_monitor_b;
 703                         },
 704                         0x21 => {
 705                                 if !chan_b_disconnected {
 706                                         nodes[1].peer_disconnected(&nodes[2].get_our_node_id(), false);
 707                                         chan_b_disconnected = true;
 708                                         drain_msg_events_on_disconnect!(2);
 709                                 }
 710                                 let (new_node_c, new_monitor_c) = reload_node!(node_c_ser, 2, monitor_c);
 711                                 node_c = Arc::new(new_node_c);
 712                                 nodes[2] = node_c.clone();
 713                                 monitor_c = new_monitor_c;
 714                         },
 715                         _ => test_return!(),
 716                 }
 717
 718                 if monitor_a.should_update_manager.load(atomic::Ordering::Relaxed) {
 719                         node_a_ser.0.clear();
 720                         nodes[0].write(&mut node_a_ser).unwrap();
 721                         monitor_a.should_update_manager.store(false, atomic::Ordering::Relaxed);
 722                         *monitor_a.latest_updates_good_at_last_ser.lock().unwrap() = monitor_a.latest_update_good.lock().unwrap().clone();
 723                 }
 724                 if monitor_b.should_update_manager.load(atomic::Ordering::Relaxed) {
 725                         node_b_ser.0.clear();
 726                         nodes[1].write(&mut node_b_ser).unwrap();
 727                         monitor_b.should_update_manager.store(false, atomic::Ordering::Relaxed);
 728                         *monitor_b.latest_updates_good_at_last_ser.lock().unwrap() = monitor_b.latest_update_good.lock().unwrap().clone();
 729                 }
 730                 if monitor_c.should_update_manager.load(atomic::Ordering::Relaxed) {
 731                         node_c_ser.0.clear();
 732                         nodes[2].write(&mut node_c_ser).unwrap();
 733                         monitor_c.should_update_manager.store(false, atomic::Ordering::Relaxed);
 734                         *monitor_c.latest_updates_good_at_last_ser.lock().unwrap() = monitor_c.latest_update_good.lock().unwrap().clone();
 735                 }
 736         }
 737 }
 738
 739 #[no_mangle]
 740 pub extern "C" fn chanmon_consistency_run(data: *const u8, datalen: usize) {
 741         do_test(unsafe { std::slice::from_raw_parts(data, datalen) });
 742 }
 743
 744 #[cfg(test)]
 745 mod tests {
 746         #[test]
 747         fn duplicate_crash() {
 748                 super::do_test(&::hex::decode("00").unwrap());
 749         }
 750 }