_ 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::TxMerkleNode;
  22 use bitcoin::blockdata::block::BlockHeader;
  23 use bitcoin::blockdata::constants::genesis_block;
  24 use bitcoin::blockdata::transaction::{Transaction, TxOut};
  25 use bitcoin::blockdata::script::{Builder, Script};
  26 use bitcoin::blockdata::opcodes;
  27 use bitcoin::blockdata::locktime::PackedLockTime;
  28 use bitcoin::network::constants::Network;
  29
  30 use bitcoin::hashes::Hash as TraitImport;
  31 use bitcoin::hashes::sha256::Hash as Sha256;
  32 use bitcoin::hash_types::{BlockHash, WPubkeyHash};
  33
  34 use lightning::chain;
  35 use lightning::chain::{BestBlock, ChannelMonitorUpdateStatus, chainmonitor, channelmonitor, Confirm, Watch};
  36 use lightning::chain::channelmonitor::{ChannelMonitor, MonitorEvent};
  37 use lightning::chain::transaction::OutPoint;
  38 use lightning::chain::chaininterface::{BroadcasterInterface, ConfirmationTarget, FeeEstimator};
  39 use lightning::chain::keysinterface::{KeyMaterial, KeysInterface, InMemorySigner, Recipient};
  40 use lightning::ln::{PaymentHash, PaymentPreimage, PaymentSecret};
  41 use lightning::ln::channelmanager::{self, ChainParameters, ChannelManager, PaymentSendFailure, ChannelManagerReadArgs, PaymentId};
  42 use lightning::ln::channel::FEE_SPIKE_BUFFER_FEE_INCREASE_MULTIPLE;
  43 use lightning::ln::msgs::{CommitmentUpdate, ChannelMessageHandler, DecodeError, UpdateAddHTLC, Init};
  44 use lightning::ln::script::ShutdownScript;
  45 use lightning::util::enforcing_trait_impls::{EnforcingSigner, EnforcementState};
  46 use lightning::util::errors::APIError;
  47 use lightning::util::events;
  48 use lightning::util::logger::Logger;
  49 use lightning::util::config::UserConfig;
  50 use lightning::util::events::MessageSendEventsProvider;
  51 use lightning::util::ser::{Readable, ReadableArgs, Writeable, Writer};
  52 use lightning::routing::router::{Route, RouteHop};
  53
  54 use crate::utils::test_logger::{self, Output};
  55 use crate::utils::test_persister::TestPersister;
  56
  57 use bitcoin::secp256k1::{PublicKey, SecretKey, Scalar};
  58 use bitcoin::secp256k1::ecdh::SharedSecret;
  59 use bitcoin::secp256k1::ecdsa::RecoverableSignature;
  60 use bitcoin::secp256k1::Secp256k1;
  61
  62 use std::mem;
  63 use std::cmp::{self, Ordering};
  64 use std::collections::{HashSet, hash_map, HashMap};
  65 use std::sync::{Arc,Mutex};
  66 use std::sync::atomic;
  67 use std::io::Cursor;
  68 use bitcoin::bech32::u5;
  69
  70 const MAX_FEE: u32 = 10_000;
  71 struct FuzzEstimator {
  72         ret_val: atomic::AtomicU32,
  73 }
  74 impl FeeEstimator for FuzzEstimator {
  75         fn get_est_sat_per_1000_weight(&self, conf_target: ConfirmationTarget) -> u32 {
  76                 // We force-close channels if our counterparty sends us a feerate which is a small multiple
  77                 // of our HighPriority fee estimate or smaller than our Background fee estimate. Thus, we
  78                 // always return a HighPriority feerate here which is >= the maximum Normal feerate and a
  79                 // Background feerate which is <= the minimum Normal feerate.
  80                 match conf_target {
  81                         ConfirmationTarget::HighPriority => MAX_FEE,
  82                         ConfirmationTarget::Background => 253,
  83                         ConfirmationTarget::Normal => cmp::min(self.ret_val.load(atomic::Ordering::Acquire), MAX_FEE),
  84                 }
  85         }
  86 }
  87
  88 pub struct TestBroadcaster {}
  89 impl BroadcasterInterface for TestBroadcaster {
  90         fn broadcast_transaction(&self, _tx: &Transaction) { }
  91 }
  92
  93 pub struct VecWriter(pub Vec<u8>);
  94 impl Writer for VecWriter {
  95         fn write_all(&mut self, buf: &[u8]) -> Result<(), ::std::io::Error> {
  96                 self.0.extend_from_slice(buf);
  97                 Ok(())
  98         }
  99 }
 100
 101 struct TestChainMonitor {
 102         pub logger: Arc<dyn Logger>,
 103         pub keys: Arc<KeyProvider>,
 104         pub persister: Arc<TestPersister>,
 105         pub chain_monitor: Arc<chainmonitor::ChainMonitor<EnforcingSigner, Arc<dyn chain::Filter>, Arc<TestBroadcaster>, Arc<FuzzEstimator>, Arc<dyn Logger>, Arc<TestPersister>>>,
 106         // If we reload a node with an old copy of ChannelMonitors, the ChannelManager deserialization
 107         // logic will automatically force-close our channels for us (as we don't have an up-to-date
 108         // monitor implying we are not able to punish misbehaving counterparties). Because this test
 109         // "fails" if we ever force-close a channel, we avoid doing so, always saving the latest
 110         // fully-serialized monitor state here, as well as the corresponding update_id.
 111         pub latest_monitors: Mutex<HashMap<OutPoint, (u64, Vec<u8>)>>,
 112         pub should_update_manager: atomic::AtomicBool,
 113 }
 114 impl TestChainMonitor {
 115         pub fn new(broadcaster: Arc<TestBroadcaster>, logger: Arc<dyn Logger>, feeest: Arc<FuzzEstimator>, persister: Arc<TestPersister>, keys: Arc<KeyProvider>) -> Self {
 116                 Self {
 117                         chain_monitor: Arc::new(chainmonitor::ChainMonitor::new(None, broadcaster, logger.clone(), feeest, Arc::clone(&persister))),
 118                         logger,
 119                         keys,
 120                         persister,
 121                         latest_monitors: Mutex::new(HashMap::new()),
 122                         should_update_manager: atomic::AtomicBool::new(false),
 123                 }
 124         }
 125 }
 126 impl chain::Watch<EnforcingSigner> for TestChainMonitor {
 127         fn watch_channel(&self, funding_txo: OutPoint, monitor: channelmonitor::ChannelMonitor<EnforcingSigner>) -> chain::ChannelMonitorUpdateStatus {
 128                 let mut ser = VecWriter(Vec::new());
 129                 monitor.write(&mut ser).unwrap();
 130                 if let Some(_) = self.latest_monitors.lock().unwrap().insert(funding_txo, (monitor.get_latest_update_id(), ser.0)) {
 131                         panic!("Already had monitor pre-watch_channel");
 132                 }
 133                 self.should_update_manager.store(true, atomic::Ordering::Relaxed);
 134                 self.chain_monitor.watch_channel(funding_txo, monitor)
 135         }
 136
 137         fn update_channel(&self, funding_txo: OutPoint, update: channelmonitor::ChannelMonitorUpdate) -> chain::ChannelMonitorUpdateStatus {
 138                 let mut map_lock = self.latest_monitors.lock().unwrap();
 139                 let mut map_entry = match map_lock.entry(funding_txo) {
 140                         hash_map::Entry::Occupied(entry) => entry,
 141                         hash_map::Entry::Vacant(_) => panic!("Didn't have monitor on update call"),
 142                 };
 143                 let deserialized_monitor = <(BlockHash, channelmonitor::ChannelMonitor<EnforcingSigner>)>::
 144                         read(&mut Cursor::new(&map_entry.get().1), &*self.keys).unwrap().1;
 145                 deserialized_monitor.update_monitor(&update, &&TestBroadcaster{}, &FuzzEstimator { ret_val: atomic::AtomicU32::new(253) }, &self.logger).unwrap();
 146                 let mut ser = VecWriter(Vec::new());
 147                 deserialized_monitor.write(&mut ser).unwrap();
 148                 map_entry.insert((update.update_id, ser.0));
 149                 self.should_update_manager.store(true, atomic::Ordering::Relaxed);
 150                 self.chain_monitor.update_channel(funding_txo, update)
 151         }
 152
 153         fn release_pending_monitor_events(&self) -> Vec<(OutPoint, Vec<MonitorEvent>, Option<PublicKey>)> {
 154                 return self.chain_monitor.release_pending_monitor_events();
 155         }
 156 }
 157
 158 struct KeyProvider {
 159         node_id: u8,
 160         rand_bytes_id: atomic::AtomicU32,
 161         enforcement_states: Mutex<HashMap<[u8;32], Arc<Mutex<EnforcementState>>>>,
 162 }
 163 impl KeysInterface for KeyProvider {
 164         type Signer = EnforcingSigner;
 165
 166         fn get_node_secret(&self, _recipient: Recipient) -> Result<SecretKey, ()> {
 167                 Ok(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())
 168         }
 169
 170         fn ecdh(&self, recipient: Recipient, other_key: &PublicKey, tweak: Option<&Scalar>) -> Result<SharedSecret, ()> {
 171                 let mut node_secret = self.get_node_secret(recipient)?;
 172                 if let Some(tweak) = tweak {
 173                         node_secret = node_secret.mul_tweak(tweak).unwrap();
 174                 }
 175                 Ok(SharedSecret::new(other_key, &node_secret))
 176         }
 177
 178         fn get_inbound_payment_key_material(&self) -> KeyMaterial {
 179                 KeyMaterial([0, 0, 0, 0, 0, 0, 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])
 180         }
 181
 182         fn get_destination_script(&self) -> Script {
 183                 let secp_ctx = Secp256k1::signing_only();
 184                 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();
 185                 let our_channel_monitor_claim_key_hash = WPubkeyHash::hash(&PublicKey::from_secret_key(&secp_ctx, &channel_monitor_claim_key).serialize());
 186                 Builder::new().push_opcode(opcodes::all::OP_PUSHBYTES_0).push_slice(&our_channel_monitor_claim_key_hash[..]).into_script()
 187         }
 188
 189         fn get_shutdown_scriptpubkey(&self) -> ShutdownScript {
 190                 let secp_ctx = Secp256k1::signing_only();
 191                 let secret_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, 3, self.node_id]).unwrap();
 192                 let pubkey_hash = WPubkeyHash::hash(&PublicKey::from_secret_key(&secp_ctx, &secret_key).serialize());
 193                 ShutdownScript::new_p2wpkh(&pubkey_hash)
 194         }
 195
 196         fn get_channel_signer(&self, _inbound: bool, channel_value_satoshis: u64) -> EnforcingSigner {
 197                 let secp_ctx = Secp256k1::signing_only();
 198                 let id = self.rand_bytes_id.fetch_add(1, atomic::Ordering::Relaxed);
 199                 let keys = InMemorySigner::new(
 200                         &secp_ctx,
 201                         self.get_node_secret(Recipient::Node).unwrap(),
 202                         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(),
 203                         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(),
 204                         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(),
 205                         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(),
 206                         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(),
 207                         [id as u8, 0, 0, 0, 0, 0, 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],
 208                         channel_value_satoshis,
 209                         [0; 32],
 210                 );
 211                 let revoked_commitment = self.make_enforcement_state_cell(keys.commitment_seed);
 212                 EnforcingSigner::new_with_revoked(keys, revoked_commitment, false)
 213         }
 214
 215         fn get_secure_random_bytes(&self) -> [u8; 32] {
 216                 let id = self.rand_bytes_id.fetch_add(1, atomic::Ordering::Relaxed);
 217                 let mut res = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 11, self.node_id];
 218                 res[30-4..30].copy_from_slice(&id.to_le_bytes());
 219                 res
 220         }
 221
 222         fn read_chan_signer(&self, buffer: &[u8]) -> Result<Self::Signer, DecodeError> {
 223                 let mut reader = std::io::Cursor::new(buffer);
 224
 225                 let inner: InMemorySigner = ReadableArgs::read(&mut reader, self.get_node_secret(Recipient::Node).unwrap())?;
 226                 let state = self.make_enforcement_state_cell(inner.commitment_seed);
 227
 228                 Ok(EnforcingSigner {
 229                         inner,
 230                         state,
 231                         disable_revocation_policy_check: false,
 232                 })
 233         }
 234
 235         fn sign_invoice(&self, _hrp_bytes: &[u8], _invoice_data: &[u5], _recipient: Recipient) -> Result<RecoverableSignature, ()> {
 236                 unreachable!()
 237         }
 238 }
 239
 240 impl KeyProvider {
 241         fn make_enforcement_state_cell(&self, commitment_seed: [u8; 32]) -> Arc<Mutex<EnforcementState>> {
 242                 let mut revoked_commitments = self.enforcement_states.lock().unwrap();
 243                 if !revoked_commitments.contains_key(&commitment_seed) {
 244                         revoked_commitments.insert(commitment_seed, Arc::new(Mutex::new(EnforcementState::new())));
 245                 }
 246                 let cell = revoked_commitments.get(&commitment_seed).unwrap();
 247                 Arc::clone(cell)
 248         }
 249 }
 250
 251 #[inline]
 252 fn check_api_err(api_err: APIError) {
 253         match api_err {
 254                 APIError::APIMisuseError { .. } => panic!("We can't misuse the API"),
 255                 APIError::FeeRateTooHigh { .. } => panic!("We can't send too much fee?"),
 256                 APIError::RouteError { .. } => panic!("Our routes should work"),
 257                 APIError::ChannelUnavailable { err } => {
 258                         // Test the error against a list of errors we can hit, and reject
 259                         // all others. If you hit this panic, the list of acceptable errors
 260                         // is probably just stale and you should add new messages here.
 261                         match err.as_str() {
 262                                 "Peer for first hop currently disconnected/pending monitor update!" => {},
 263                                 _ if err.starts_with("Cannot push more than their max accepted HTLCs ") => {},
 264                                 _ if err.starts_with("Cannot send value that would put us over the max HTLC value in flight our peer will accept ") => {},
 265                                 _ if err.starts_with("Cannot send value that would put our balance under counterparty-announced channel reserve value") => {},
 266                                 _ if err.starts_with("Cannot send value that would put counterparty balance under holder-announced channel reserve value") => {},
 267                                 _ if err.starts_with("Cannot send value that would overdraw remaining funds.") => {},
 268                                 _ if err.starts_with("Cannot send value that would not leave enough to pay for fees.") => {},
 269                                 _ if err.starts_with("Cannot send value that would put our exposure to dust HTLCs at") => {},
 270                                 _ => panic!("{}", err),
 271                         }
 272                 },
 273                 APIError::MonitorUpdateInProgress => {
 274                         // We can (obviously) temp-fail a monitor update
 275                 },
 276                 APIError::IncompatibleShutdownScript { .. } => panic!("Cannot send an incompatible shutdown script"),
 277         }
 278 }
 279 #[inline]
 280 fn check_payment_err(send_err: PaymentSendFailure) {
 281         match send_err {
 282                 PaymentSendFailure::ParameterError(api_err) => check_api_err(api_err),
 283                 PaymentSendFailure::PathParameterError(per_path_results) => {
 284                         for res in per_path_results { if let Err(api_err) = res { check_api_err(api_err); } }
 285                 },
 286                 PaymentSendFailure::AllFailedResendSafe(per_path_results) => {
 287                         for api_err in per_path_results { check_api_err(api_err); }
 288                 },
 289                 PaymentSendFailure::PartialFailure { results, .. } => {
 290                         for res in results { if let Err(api_err) = res { check_api_err(api_err); } }
 291                 },
 292                 PaymentSendFailure::DuplicatePayment => panic!(),
 293         }
 294 }
 295
 296 type ChanMan = ChannelManager<Arc<TestChainMonitor>, Arc<TestBroadcaster>, Arc<KeyProvider>, Arc<FuzzEstimator>, Arc<dyn Logger>>;
 297
 298 #[inline]
 299 fn get_payment_secret_hash(dest: &ChanMan, payment_id: &mut u8) -> Option<(PaymentSecret, PaymentHash)> {
 300         let mut payment_hash;
 301         for _ in 0..256 {
 302                 payment_hash = PaymentHash(Sha256::hash(&[*payment_id; 1]).into_inner());
 303                 if let Ok(payment_secret) = dest.create_inbound_payment_for_hash(payment_hash, None, 3600) {
 304                         return Some((payment_secret, payment_hash));
 305                 }
 306                 *payment_id = payment_id.wrapping_add(1);
 307         }
 308         None
 309 }
 310
 311 #[inline]
 312 fn send_payment(source: &ChanMan, dest: &ChanMan, dest_chan_id: u64, amt: u64, payment_id: &mut u8, payment_idx: &mut u64) -> bool {
 313         let (payment_secret, payment_hash) =
 314                 if let Some((secret, hash)) = get_payment_secret_hash(dest, payment_id) { (secret, hash) } else { return true; };
 315         let mut payment_id = [0; 32];
 316         payment_id[0..8].copy_from_slice(&payment_idx.to_ne_bytes());
 317         *payment_idx += 1;
 318         if let Err(err) = source.send_payment(&Route {
 319                 paths: vec![vec![RouteHop {
 320                         pubkey: dest.get_our_node_id(),
 321                         node_features: channelmanager::provided_node_features(),
 322                         short_channel_id: dest_chan_id,
 323                         channel_features: channelmanager::provided_channel_features(),
 324                         fee_msat: amt,
 325                         cltv_expiry_delta: 200,
 326                 }]],
 327                 payment_params: None,
 328         }, payment_hash, &Some(payment_secret), PaymentId(payment_id)) {
 329                 check_payment_err(err);
 330                 false
 331         } else { true }
 332 }
 333 #[inline]
 334 fn send_hop_payment(source: &ChanMan, middle: &ChanMan, middle_chan_id: u64, dest: &ChanMan, dest_chan_id: u64, amt: u64, payment_id: &mut u8, payment_idx: &mut u64) -> bool {
 335         let (payment_secret, payment_hash) =
 336                 if let Some((secret, hash)) = get_payment_secret_hash(dest, payment_id) { (secret, hash) } else { return true; };
 337         let mut payment_id = [0; 32];
 338         payment_id[0..8].copy_from_slice(&payment_idx.to_ne_bytes());
 339         *payment_idx += 1;
 340         if let Err(err) = source.send_payment(&Route {
 341                 paths: vec![vec![RouteHop {
 342                         pubkey: middle.get_our_node_id(),
 343                         node_features: channelmanager::provided_node_features(),
 344                         short_channel_id: middle_chan_id,
 345                         channel_features: channelmanager::provided_channel_features(),
 346                         fee_msat: 50000,
 347                         cltv_expiry_delta: 100,
 348                 },RouteHop {
 349                         pubkey: dest.get_our_node_id(),
 350                         node_features: channelmanager::provided_node_features(),
 351                         short_channel_id: dest_chan_id,
 352                         channel_features: channelmanager::provided_channel_features(),
 353                         fee_msat: amt,
 354                         cltv_expiry_delta: 200,
 355                 }]],
 356                 payment_params: None,
 357         }, payment_hash, &Some(payment_secret), PaymentId(payment_id)) {
 358                 check_payment_err(err);
 359                 false
 360         } else { true }
 361 }
 362
 363 #[inline]
 364 pub fn do_test<Out: Output>(data: &[u8], underlying_out: Out) {
 365         let out = SearchingOutput::new(underlying_out);
 366         let broadcast = Arc::new(TestBroadcaster{});
 367
 368         macro_rules! make_node {
 369                 ($node_id: expr, $fee_estimator: expr) => { {
 370                         let logger: Arc<dyn Logger> = Arc::new(test_logger::TestLogger::new($node_id.to_string(), out.clone()));
 371                         let keys_manager = Arc::new(KeyProvider { node_id: $node_id, rand_bytes_id: atomic::AtomicU32::new(0), enforcement_states: Mutex::new(HashMap::new()) });
 372                         let monitor = Arc::new(TestChainMonitor::new(broadcast.clone(), logger.clone(), $fee_estimator.clone(),
 373                                 Arc::new(TestPersister {
 374                                         update_ret: Mutex::new(ChannelMonitorUpdateStatus::Completed)
 375                                 }), Arc::clone(&keys_manager)));
 376
 377                         let mut config = UserConfig::default();
 378                         config.channel_config.forwarding_fee_proportional_millionths = 0;
 379                         config.channel_handshake_config.announced_channel = true;
 380                         let network = Network::Bitcoin;
 381                         let params = ChainParameters {
 382                                 network,
 383                                 best_block: BestBlock::from_genesis(network),
 384                         };
 385                         (ChannelManager::new($fee_estimator.clone(), monitor.clone(), broadcast.clone(), Arc::clone(&logger), keys_manager.clone(), config, params),
 386                         monitor, keys_manager)
 387                 } }
 388         }
 389
 390         macro_rules! reload_node {
 391                 ($ser: expr, $node_id: expr, $old_monitors: expr, $keys_manager: expr, $fee_estimator: expr) => { {
 392                     let keys_manager = Arc::clone(& $keys_manager);
 393                         let logger: Arc<dyn Logger> = Arc::new(test_logger::TestLogger::new($node_id.to_string(), out.clone()));
 394                         let chain_monitor = Arc::new(TestChainMonitor::new(broadcast.clone(), logger.clone(), $fee_estimator.clone(),
 395                                 Arc::new(TestPersister {
 396                                         update_ret: Mutex::new(ChannelMonitorUpdateStatus::Completed)
 397                                 }), Arc::clone(& $keys_manager)));
 398
 399                         let mut config = UserConfig::default();
 400                         config.channel_config.forwarding_fee_proportional_millionths = 0;
 401                         config.channel_handshake_config.announced_channel = true;
 402
 403                         let mut monitors = HashMap::new();
 404                         let mut old_monitors = $old_monitors.latest_monitors.lock().unwrap();
 405                         for (outpoint, (update_id, monitor_ser)) in old_monitors.drain() {
 406                                 monitors.insert(outpoint, <(BlockHash, ChannelMonitor<EnforcingSigner>)>::read(&mut Cursor::new(&monitor_ser), &*$keys_manager).expect("Failed to read monitor").1);
 407                                 chain_monitor.latest_monitors.lock().unwrap().insert(outpoint, (update_id, monitor_ser));
 408                         }
 409                         let mut monitor_refs = HashMap::new();
 410                         for (outpoint, monitor) in monitors.iter_mut() {
 411                                 monitor_refs.insert(*outpoint, monitor);
 412                         }
 413
 414                         let read_args = ChannelManagerReadArgs {
 415                                 keys_manager,
 416                                 fee_estimator: $fee_estimator.clone(),
 417                                 chain_monitor: chain_monitor.clone(),
 418                                 tx_broadcaster: broadcast.clone(),
 419                                 logger,
 420                                 default_config: config,
 421                                 channel_monitors: monitor_refs,
 422                         };
 423
 424                         let res = (<(BlockHash, ChanMan)>::read(&mut Cursor::new(&$ser.0), read_args).expect("Failed to read manager").1, chain_monitor.clone());
 425                         for (funding_txo, mon) in monitors.drain() {
 426                                 assert_eq!(chain_monitor.chain_monitor.watch_channel(funding_txo, mon),
 427                                         ChannelMonitorUpdateStatus::Completed);
 428                         }
 429                         res
 430                 } }
 431         }
 432
 433         let mut channel_txn = Vec::new();
 434         macro_rules! make_channel {
 435                 ($source: expr, $dest: expr, $chan_id: expr) => { {
 436                         $source.peer_connected(&$dest.get_our_node_id(), &Init { features: channelmanager::provided_init_features(), remote_network_address: None }).unwrap();
 437                         $dest.peer_connected(&$source.get_our_node_id(), &Init { features: channelmanager::provided_init_features(), remote_network_address: None }).unwrap();
 438
 439                         $source.create_channel($dest.get_our_node_id(), 100_000, 42, 0, None).unwrap();
 440                         let open_channel = {
 441                                 let events = $source.get_and_clear_pending_msg_events();
 442                                 assert_eq!(events.len(), 1);
 443                                 if let events::MessageSendEvent::SendOpenChannel { ref msg, .. } = events[0] {
 444                                         msg.clone()
 445                                 } else { panic!("Wrong event type"); }
 446                         };
 447
 448                         $dest.handle_open_channel(&$source.get_our_node_id(), channelmanager::provided_init_features(), &open_channel);
 449                         let accept_channel = {
 450                                 let events = $dest.get_and_clear_pending_msg_events();
 451                                 assert_eq!(events.len(), 1);
 452                                 if let events::MessageSendEvent::SendAcceptChannel { ref msg, .. } = events[0] {
 453                                         msg.clone()
 454                                 } else { panic!("Wrong event type"); }
 455                         };
 456
 457                         $source.handle_accept_channel(&$dest.get_our_node_id(), channelmanager::provided_init_features(), &accept_channel);
 458                         let funding_output;
 459                         {
 460                                 let events = $source.get_and_clear_pending_events();
 461                                 assert_eq!(events.len(), 1);
 462                                 if let events::Event::FundingGenerationReady { ref temporary_channel_id, ref channel_value_satoshis, ref output_script, .. } = events[0] {
 463                                         let tx = Transaction { version: $chan_id, lock_time: PackedLockTime::ZERO, input: Vec::new(), output: vec![TxOut {
 464                                                 value: *channel_value_satoshis, script_pubkey: output_script.clone(),
 465                                         }]};
 466                                         funding_output = OutPoint { txid: tx.txid(), index: 0 };
 467                                         $source.funding_transaction_generated(&temporary_channel_id, &$dest.get_our_node_id(), tx.clone()).unwrap();
 468                                         channel_txn.push(tx);
 469                                 } else { panic!("Wrong event type"); }
 470                         }
 471
 472                         let funding_created = {
 473                                 let events = $source.get_and_clear_pending_msg_events();
 474                                 assert_eq!(events.len(), 1);
 475                                 if let events::MessageSendEvent::SendFundingCreated { ref msg, .. } = events[0] {
 476                                         msg.clone()
 477                                 } else { panic!("Wrong event type"); }
 478                         };
 479                         $dest.handle_funding_created(&$source.get_our_node_id(), &funding_created);
 480
 481                         let funding_signed = {
 482                                 let events = $dest.get_and_clear_pending_msg_events();
 483                                 assert_eq!(events.len(), 1);
 484                                 if let events::MessageSendEvent::SendFundingSigned { ref msg, .. } = events[0] {
 485                                         msg.clone()
 486                                 } else { panic!("Wrong event type"); }
 487                         };
 488                         $source.handle_funding_signed(&$dest.get_our_node_id(), &funding_signed);
 489
 490                         funding_output
 491                 } }
 492         }
 493
 494         macro_rules! confirm_txn {
 495                 ($node: expr) => { {
 496                         let chain_hash = genesis_block(Network::Bitcoin).block_hash();
 497                         let mut header = BlockHeader { version: 0x20000000, prev_blockhash: chain_hash, merkle_root: TxMerkleNode::all_zeros(), time: 42, bits: 42, nonce: 42 };
 498                         let txdata: Vec<_> = channel_txn.iter().enumerate().map(|(i, tx)| (i + 1, tx)).collect();
 499                         $node.transactions_confirmed(&header, &txdata, 1);
 500                         for _ in 2..100 {
 501                                 header = BlockHeader { version: 0x20000000, prev_blockhash: header.block_hash(), merkle_root: TxMerkleNode::all_zeros(), time: 42, bits: 42, nonce: 42 };
 502                         }
 503                         $node.best_block_updated(&header, 99);
 504                 } }
 505         }
 506
 507         macro_rules! lock_fundings {
 508                 ($nodes: expr) => { {
 509                         let mut node_events = Vec::new();
 510                         for node in $nodes.iter() {
 511                                 node_events.push(node.get_and_clear_pending_msg_events());
 512                         }
 513                         for (idx, node_event) in node_events.iter().enumerate() {
 514                                 for event in node_event {
 515                                         if let events::MessageSendEvent::SendChannelReady { ref node_id, ref msg } = event {
 516                                                 for node in $nodes.iter() {
 517                                                         if node.get_our_node_id() == *node_id {
 518                                                                 node.handle_channel_ready(&$nodes[idx].get_our_node_id(), msg);
 519                                                         }
 520                                                 }
 521                                         } else { panic!("Wrong event type"); }
 522                                 }
 523                         }
 524
 525                         for node in $nodes.iter() {
 526                                 let events = node.get_and_clear_pending_msg_events();
 527                                 for event in events {
 528                                         if let events::MessageSendEvent::SendAnnouncementSignatures { .. } = event {
 529                                         } else { panic!("Wrong event type"); }
 530                                 }
 531                         }
 532                 } }
 533         }
 534
 535         let fee_est_a = Arc::new(FuzzEstimator { ret_val: atomic::AtomicU32::new(253) });
 536         let mut last_htlc_clear_fee_a =  253;
 537         let fee_est_b = Arc::new(FuzzEstimator { ret_val: atomic::AtomicU32::new(253) });
 538         let mut last_htlc_clear_fee_b =  253;
 539         let fee_est_c = Arc::new(FuzzEstimator { ret_val: atomic::AtomicU32::new(253) });
 540         let mut last_htlc_clear_fee_c =  253;
 541
 542         // 3 nodes is enough to hit all the possible cases, notably unknown-source-unknown-dest
 543         // forwarding.
 544         let (node_a, mut monitor_a, keys_manager_a) = make_node!(0, fee_est_a);
 545         let (node_b, mut monitor_b, keys_manager_b) = make_node!(1, fee_est_b);
 546         let (node_c, mut monitor_c, keys_manager_c) = make_node!(2, fee_est_c);
 547
 548         let mut nodes = [node_a, node_b, node_c];
 549
 550         let chan_1_funding = make_channel!(nodes[0], nodes[1], 0);
 551         let chan_2_funding = make_channel!(nodes[1], nodes[2], 1);
 552
 553         for node in nodes.iter() {
 554                 confirm_txn!(node);
 555         }
 556
 557         lock_fundings!(nodes);
 558
 559         let chan_a = nodes[0].list_usable_channels()[0].short_channel_id.unwrap();
 560         let chan_b = nodes[2].list_usable_channels()[0].short_channel_id.unwrap();
 561
 562         let mut payment_id: u8 = 0;
 563         let mut payment_idx: u64 = 0;
 564
 565         let mut chan_a_disconnected = false;
 566         let mut chan_b_disconnected = false;
 567         let mut ab_events = Vec::new();
 568         let mut ba_events = Vec::new();
 569         let mut bc_events = Vec::new();
 570         let mut cb_events = Vec::new();
 571
 572         let mut node_a_ser = VecWriter(Vec::new());
 573         nodes[0].write(&mut node_a_ser).unwrap();
 574         let mut node_b_ser = VecWriter(Vec::new());
 575         nodes[1].write(&mut node_b_ser).unwrap();
 576         let mut node_c_ser = VecWriter(Vec::new());
 577         nodes[2].write(&mut node_c_ser).unwrap();
 578
 579         macro_rules! test_return {
 580                 () => { {
 581                         assert_eq!(nodes[0].list_channels().len(), 1);
 582                         assert_eq!(nodes[1].list_channels().len(), 2);
 583                         assert_eq!(nodes[2].list_channels().len(), 1);
 584                         return;
 585                 } }
 586         }
 587
 588         let mut read_pos = 0;
 589         macro_rules! get_slice {
 590                 ($len: expr) => {
 591                         {
 592                                 let slice_len = $len as usize;
 593                                 if data.len() < read_pos + slice_len {
 594                                         test_return!();
 595                                 }
 596                                 read_pos += slice_len;
 597                                 &data[read_pos - slice_len..read_pos]
 598                         }
 599                 }
 600         }
 601
 602         loop {
 603                 // Push any events from Node B onto ba_events and bc_events
 604                 macro_rules! push_excess_b_events {
 605                         ($excess_events: expr, $expect_drop_node: expr) => { {
 606                                 let a_id = nodes[0].get_our_node_id();
 607                                 let expect_drop_node: Option<usize> = $expect_drop_node;
 608                                 let expect_drop_id = if let Some(id) = expect_drop_node { Some(nodes[id].get_our_node_id()) } else { None };
 609                                 for event in $excess_events {
 610                                         let push_a = match event {
 611                                                 events::MessageSendEvent::UpdateHTLCs { ref node_id, .. } => {
 612                                                         if Some(*node_id) == expect_drop_id { panic!("peer_disconnected should drop msgs bound for the disconnected peer"); }
 613                                                         *node_id == a_id
 614                                                 },
 615                                                 events::MessageSendEvent::SendRevokeAndACK { ref node_id, .. } => {
 616                                                         if Some(*node_id) == expect_drop_id { panic!("peer_disconnected should drop msgs bound for the disconnected peer"); }
 617                                                         *node_id == a_id
 618                                                 },
 619                                                 events::MessageSendEvent::SendChannelReestablish { ref node_id, .. } => {
 620                                                         if Some(*node_id) == expect_drop_id { panic!("peer_disconnected should drop msgs bound for the disconnected peer"); }
 621                                                         *node_id == a_id
 622                                                 },
 623                                                 events::MessageSendEvent::SendChannelReady { .. } => continue,
 624                                                 events::MessageSendEvent::SendAnnouncementSignatures { .. } => continue,
 625                                                 events::MessageSendEvent::SendChannelUpdate { ref node_id, ref msg } => {
 626                                                         assert_eq!(msg.contents.flags & 2, 0); // The disable bit must never be set!
 627                                                         if Some(*node_id) == expect_drop_id { panic!("peer_disconnected should drop msgs bound for the disconnected peer"); }
 628                                                         *node_id == a_id
 629                                                 },
 630                                                 _ => panic!("Unhandled message event {:?}", event),
 631                                         };
 632                                         if push_a { ba_events.push(event); } else { bc_events.push(event); }
 633                                 }
 634                         } }
 635                 }
 636
 637                 // While delivering messages, we select across three possible message selection processes
 638                 // to ensure we get as much coverage as possible. See the individual enum variants for more
 639                 // details.
 640                 #[derive(PartialEq)]
 641                 enum ProcessMessages {
 642                         /// Deliver all available messages, including fetching any new messages from
 643                         /// `get_and_clear_pending_msg_events()` (which may have side effects).
 644                         AllMessages,
 645                         /// Call `get_and_clear_pending_msg_events()` first, and then deliver up to one
 646                         /// message (which may already be queued).
 647                         OneMessage,
 648                         /// Deliver up to one already-queued message. This avoids any potential side-effects
 649                         /// of `get_and_clear_pending_msg_events()` (eg freeing the HTLC holding cell), which
 650                         /// provides potentially more coverage.
 651                         OnePendingMessage,
 652                 }
 653
 654                 macro_rules! process_msg_events {
 655                         ($node: expr, $corrupt_forward: expr, $limit_events: expr) => { {
 656                                 let mut events = if $node == 1 {
 657                                         let mut new_events = Vec::new();
 658                                         mem::swap(&mut new_events, &mut ba_events);
 659                                         new_events.extend_from_slice(&bc_events[..]);
 660                                         bc_events.clear();
 661                                         new_events
 662                                 } else if $node == 0 {
 663                                         let mut new_events = Vec::new();
 664                                         mem::swap(&mut new_events, &mut ab_events);
 665                                         new_events
 666                                 } else {
 667                                         let mut new_events = Vec::new();
 668                                         mem::swap(&mut new_events, &mut cb_events);
 669                                         new_events
 670                                 };
 671                                 let mut new_events = Vec::new();
 672                                 if $limit_events != ProcessMessages::OnePendingMessage {
 673                                         new_events = nodes[$node].get_and_clear_pending_msg_events();
 674                                 }
 675                                 let mut had_events = false;
 676                                 let mut events_iter = events.drain(..).chain(new_events.drain(..));
 677                                 let mut extra_ev = None;
 678                                 for event in &mut events_iter {
 679                                         had_events = true;
 680                                         match event {
 681                                                 events::MessageSendEvent::UpdateHTLCs { node_id, updates: CommitmentUpdate { update_add_htlcs, update_fail_htlcs, update_fulfill_htlcs, update_fail_malformed_htlcs, update_fee, commitment_signed } } => {
 682                                                         for (idx, dest) in nodes.iter().enumerate() {
 683                                                                 if dest.get_our_node_id() == node_id {
 684                                                                         for update_add in update_add_htlcs.iter() {
 685                                                                                 out.locked_write(format!("Delivering update_add_htlc to node {}.\n", idx).as_bytes());
 686                                                                                 if !$corrupt_forward {
 687                                                                                         dest.handle_update_add_htlc(&nodes[$node].get_our_node_id(), update_add);
 688                                                                                 } else {
 689                                                                                         // Corrupt the update_add_htlc message so that its HMAC
 690                                                                                         // check will fail and we generate a
 691                                                                                         // update_fail_malformed_htlc instead of an
 692                                                                                         // update_fail_htlc as we do when we reject a payment.
 693                                                                                         let mut msg_ser = update_add.encode();
 694                                                                                         msg_ser[1000] ^= 0xff;
 695                                                                                         let new_msg = UpdateAddHTLC::read(&mut Cursor::new(&msg_ser)).unwrap();
 696                                                                                         dest.handle_update_add_htlc(&nodes[$node].get_our_node_id(), &new_msg);
 697                                                                                 }
 698                                                                         }
 699                                                                         for update_fulfill in update_fulfill_htlcs.iter() {
 700                                                                                 out.locked_write(format!("Delivering update_fulfill_htlc to node {}.\n", idx).as_bytes());
 701                                                                                 dest.handle_update_fulfill_htlc(&nodes[$node].get_our_node_id(), update_fulfill);
 702                                                                         }
 703                                                                         for update_fail in update_fail_htlcs.iter() {
 704                                                                                 out.locked_write(format!("Delivering update_fail_htlc to node {}.\n", idx).as_bytes());
 705                                                                                 dest.handle_update_fail_htlc(&nodes[$node].get_our_node_id(), update_fail);
 706                                                                         }
 707                                                                         for update_fail_malformed in update_fail_malformed_htlcs.iter() {
 708                                                                                 out.locked_write(format!("Delivering update_fail_malformed_htlc to node {}.\n", idx).as_bytes());
 709                                                                                 dest.handle_update_fail_malformed_htlc(&nodes[$node].get_our_node_id(), update_fail_malformed);
 710                                                                         }
 711                                                                         if let Some(msg) = update_fee {
 712                                                                                 out.locked_write(format!("Delivering update_fee to node {}.\n", idx).as_bytes());
 713                                                                                 dest.handle_update_fee(&nodes[$node].get_our_node_id(), &msg);
 714                                                                         }
 715                                                                         let processed_change = !update_add_htlcs.is_empty() || !update_fulfill_htlcs.is_empty() ||
 716                                                                                 !update_fail_htlcs.is_empty() || !update_fail_malformed_htlcs.is_empty();
 717                                                                         if $limit_events != ProcessMessages::AllMessages && processed_change {
 718                                                                                 // If we only want to process some messages, don't deliver the CS until later.
 719                                                                                 extra_ev = Some(events::MessageSendEvent::UpdateHTLCs { node_id, updates: CommitmentUpdate {
 720                                                                                         update_add_htlcs: Vec::new(),
 721                                                                                         update_fail_htlcs: Vec::new(),
 722                                                                                         update_fulfill_htlcs: Vec::new(),
 723                                                                                         update_fail_malformed_htlcs: Vec::new(),
 724                                                                                         update_fee: None,
 725                                                                                         commitment_signed
 726                                                                                 } });
 727                                                                                 break;
 728                                                                         }
 729                                                                         out.locked_write(format!("Delivering commitment_signed to node {}.\n", idx).as_bytes());
 730                                                                         dest.handle_commitment_signed(&nodes[$node].get_our_node_id(), &commitment_signed);
 731                                                                         break;
 732                                                                 }
 733                                                         }
 734                                                 },
 735                                                 events::MessageSendEvent::SendRevokeAndACK { ref node_id, ref msg } => {
 736                                                         for (idx, dest) in nodes.iter().enumerate() {
 737                                                                 if dest.get_our_node_id() == *node_id {
 738                                                                         out.locked_write(format!("Delivering revoke_and_ack to node {}.\n", idx).as_bytes());
 739                                                                         dest.handle_revoke_and_ack(&nodes[$node].get_our_node_id(), msg);
 740                                                                 }
 741                                                         }
 742                                                 },
 743                                                 events::MessageSendEvent::SendChannelReestablish { ref node_id, ref msg } => {
 744                                                         for (idx, dest) in nodes.iter().enumerate() {
 745                                                                 if dest.get_our_node_id() == *node_id {
 746                                                                         out.locked_write(format!("Delivering channel_reestablish to node {}.\n", idx).as_bytes());
 747                                                                         dest.handle_channel_reestablish(&nodes[$node].get_our_node_id(), msg);
 748                                                                 }
 749                                                         }
 750                                                 },
 751                                                 events::MessageSendEvent::SendChannelReady { .. } => {
 752                                                         // Can be generated as a reestablish response
 753                                                 },
 754                                                 events::MessageSendEvent::SendAnnouncementSignatures { .. } => {
 755                                                         // Can be generated as a reestablish response
 756                                                 },
 757                                                 events::MessageSendEvent::SendChannelUpdate { ref msg, .. } => {
 758                                                         // When we reconnect we will resend a channel_update to make sure our
 759                                                         // counterparty has the latest parameters for receiving payments
 760                                                         // through us. We do, however, check that the message does not include
 761                                                         // the "disabled" bit, as we should never ever have a channel which is
 762                                                         // disabled when we send such an update (or it may indicate channel
 763                                                         // force-close which we should detect as an error).
 764                                                         assert_eq!(msg.contents.flags & 2, 0);
 765                                                 },
 766                                                 _ => if out.may_fail.load(atomic::Ordering::Acquire) {
 767                                                         return;
 768                                                 } else {
 769                                                         panic!("Unhandled message event {:?}", event)
 770                                                 },
 771                                         }
 772                                         if $limit_events != ProcessMessages::AllMessages {
 773                                                 break;
 774                                         }
 775                                 }
 776                                 if $node == 1 {
 777                                         push_excess_b_events!(extra_ev.into_iter().chain(events_iter), None);
 778                                 } else if $node == 0 {
 779                                         if let Some(ev) = extra_ev { ab_events.push(ev); }
 780                                         for event in events_iter { ab_events.push(event); }
 781                                 } else {
 782                                         if let Some(ev) = extra_ev { cb_events.push(ev); }
 783                                         for event in events_iter { cb_events.push(event); }
 784                                 }
 785                                 had_events
 786                         } }
 787                 }
 788
 789                 macro_rules! drain_msg_events_on_disconnect {
 790                         ($counterparty_id: expr) => { {
 791                                 if $counterparty_id == 0 {
 792                                         for event in nodes[0].get_and_clear_pending_msg_events() {
 793                                                 match event {
 794                                                         events::MessageSendEvent::UpdateHTLCs { .. } => {},
 795                                                         events::MessageSendEvent::SendRevokeAndACK { .. } => {},
 796                                                         events::MessageSendEvent::SendChannelReestablish { .. } => {},
 797                                                         events::MessageSendEvent::SendChannelReady { .. } => {},
 798                                                         events::MessageSendEvent::SendAnnouncementSignatures { .. } => {},
 799                                                         events::MessageSendEvent::SendChannelUpdate { ref msg, .. } => {
 800                                                                 assert_eq!(msg.contents.flags & 2, 0); // The disable bit must never be set!
 801                                                         },
 802                                                         _ => if out.may_fail.load(atomic::Ordering::Acquire) {
 803                                                                 return;
 804                                                         } else {
 805                                                                 panic!("Unhandled message event")
 806                                                         },
 807                                                 }
 808                                         }
 809                                         push_excess_b_events!(nodes[1].get_and_clear_pending_msg_events().drain(..), Some(0));
 810                                         ab_events.clear();
 811                                         ba_events.clear();
 812                                 } else {
 813                                         for event in nodes[2].get_and_clear_pending_msg_events() {
 814                                                 match event {
 815                                                         events::MessageSendEvent::UpdateHTLCs { .. } => {},
 816                                                         events::MessageSendEvent::SendRevokeAndACK { .. } => {},
 817                                                         events::MessageSendEvent::SendChannelReestablish { .. } => {},
 818                                                         events::MessageSendEvent::SendChannelReady { .. } => {},
 819                                                         events::MessageSendEvent::SendAnnouncementSignatures { .. } => {},
 820                                                         events::MessageSendEvent::SendChannelUpdate { ref msg, .. } => {
 821                                                                 assert_eq!(msg.contents.flags & 2, 0); // The disable bit must never be set!
 822                                                         },
 823                                                         _ => if out.may_fail.load(atomic::Ordering::Acquire) {
 824                                                                 return;
 825                                                         } else {
 826                                                                 panic!("Unhandled message event")
 827                                                         },
 828                                                 }
 829                                         }
 830                                         push_excess_b_events!(nodes[1].get_and_clear_pending_msg_events().drain(..), Some(2));
 831                                         bc_events.clear();
 832                                         cb_events.clear();
 833                                 }
 834                         } }
 835                 }
 836
 837                 macro_rules! process_events {
 838                         ($node: expr, $fail: expr) => { {
 839                                 // In case we get 256 payments we may have a hash collision, resulting in the
 840                                 // second claim/fail call not finding the duplicate-hash HTLC, so we have to
 841                                 // deduplicate the calls here.
 842                                 let mut claim_set = HashSet::new();
 843                                 let mut events = nodes[$node].get_and_clear_pending_events();
 844                                 // Sort events so that PendingHTLCsForwardable get processed last. This avoids a
 845                                 // case where we first process a PendingHTLCsForwardable, then claim/fail on a
 846                                 // PaymentReceived, claiming/failing two HTLCs, but leaving a just-generated
 847                                 // PaymentReceived event for the second HTLC in our pending_events (and breaking
 848                                 // our claim_set deduplication).
 849                                 events.sort_by(|a, b| {
 850                                         if let events::Event::PaymentReceived { .. } = a {
 851                                                 if let events::Event::PendingHTLCsForwardable { .. } = b {
 852                                                         Ordering::Less
 853                                                 } else { Ordering::Equal }
 854                                         } else if let events::Event::PendingHTLCsForwardable { .. } = a {
 855                                                 if let events::Event::PaymentReceived { .. } = b {
 856                                                         Ordering::Greater
 857                                                 } else { Ordering::Equal }
 858                                         } else { Ordering::Equal }
 859                                 });
 860                                 let had_events = !events.is_empty();
 861                                 for event in events.drain(..) {
 862                                         match event {
 863                                                 events::Event::PaymentReceived { payment_hash, .. } => {
 864                                                         if claim_set.insert(payment_hash.0) {
 865                                                                 if $fail {
 866                                                                         nodes[$node].fail_htlc_backwards(&payment_hash);
 867                                                                 } else {
 868                                                                         nodes[$node].claim_funds(PaymentPreimage(payment_hash.0));
 869                                                                 }
 870                                                         }
 871                                                 },
 872                                                 events::Event::PaymentSent { .. } => {},
 873                                                 events::Event::PaymentClaimed { .. } => {},
 874                                                 events::Event::PaymentPathSuccessful { .. } => {},
 875                                                 events::Event::PaymentPathFailed { .. } => {},
 876                                                 events::Event::ProbeSuccessful { .. } | events::Event::ProbeFailed { .. } => {
 877                                                         // Even though we don't explicitly send probes, because probes are
 878                                                         // detected based on hashing the payment hash+preimage, its rather
 879                                                         // trivial for the fuzzer to build payments that accidentally end up
 880                                                         // looking like probes.
 881                                                 },
 882                                                 events::Event::PaymentForwarded { .. } if $node == 1 => {},
 883                                                 events::Event::ChannelReady { .. } => {},
 884                                                 events::Event::PendingHTLCsForwardable { .. } => {
 885                                                         nodes[$node].process_pending_htlc_forwards();
 886                                                 },
 887                                                 events::Event::HTLCHandlingFailed { .. } => {},
 888                                                 _ => if out.may_fail.load(atomic::Ordering::Acquire) {
 889                                                         return;
 890                                                 } else {
 891                                                         panic!("Unhandled event")
 892                                                 },
 893                                         }
 894                                 }
 895                                 had_events
 896                         } }
 897                 }
 898
 899                 let v = get_slice!(1)[0];
 900                 out.locked_write(format!("READ A BYTE! HANDLING INPUT {:x}...........\n", v).as_bytes());
 901                 match v {
 902                         // In general, we keep related message groups close together in binary form, allowing
 903                         // bit-twiddling mutations to have similar effects. This is probably overkill, but no
 904                         // harm in doing so.
 905
 906                         0x00 => *monitor_a.persister.update_ret.lock().unwrap() = ChannelMonitorUpdateStatus::InProgress,
 907                         0x01 => *monitor_b.persister.update_ret.lock().unwrap() = ChannelMonitorUpdateStatus::InProgress,
 908                         0x02 => *monitor_c.persister.update_ret.lock().unwrap() = ChannelMonitorUpdateStatus::InProgress,
 909                         0x04 => *monitor_a.persister.update_ret.lock().unwrap() = ChannelMonitorUpdateStatus::Completed,
 910                         0x05 => *monitor_b.persister.update_ret.lock().unwrap() = ChannelMonitorUpdateStatus::Completed,
 911                         0x06 => *monitor_c.persister.update_ret.lock().unwrap() = ChannelMonitorUpdateStatus::Completed,
 912
 913                         0x08 => {
 914                                 if let Some((id, _)) = monitor_a.latest_monitors.lock().unwrap().get(&chan_1_funding) {
 915                                         monitor_a.chain_monitor.force_channel_monitor_updated(chan_1_funding, *id);
 916                                         nodes[0].process_monitor_events();
 917                                 }
 918                         },
 919                         0x09 => {
 920                                 if let Some((id, _)) = monitor_b.latest_monitors.lock().unwrap().get(&chan_1_funding) {
 921                                         monitor_b.chain_monitor.force_channel_monitor_updated(chan_1_funding, *id);
 922                                         nodes[1].process_monitor_events();
 923                                 }
 924                         },
 925                         0x0a => {
 926                                 if let Some((id, _)) = monitor_b.latest_monitors.lock().unwrap().get(&chan_2_funding) {
 927                                         monitor_b.chain_monitor.force_channel_monitor_updated(chan_2_funding, *id);
 928                                         nodes[1].process_monitor_events();
 929                                 }
 930                         },
 931                         0x0b => {
 932                                 if let Some((id, _)) = monitor_c.latest_monitors.lock().unwrap().get(&chan_2_funding) {
 933                                         monitor_c.chain_monitor.force_channel_monitor_updated(chan_2_funding, *id);
 934                                         nodes[2].process_monitor_events();
 935                                 }
 936                         },
 937
 938                         0x0c => {
 939                                 if !chan_a_disconnected {
 940                                         nodes[0].peer_disconnected(&nodes[1].get_our_node_id(), false);
 941                                         nodes[1].peer_disconnected(&nodes[0].get_our_node_id(), false);
 942                                         chan_a_disconnected = true;
 943                                         drain_msg_events_on_disconnect!(0);
 944                                 }
 945                         },
 946                         0x0d => {
 947                                 if !chan_b_disconnected {
 948                                         nodes[1].peer_disconnected(&nodes[2].get_our_node_id(), false);
 949                                         nodes[2].peer_disconnected(&nodes[1].get_our_node_id(), false);
 950                                         chan_b_disconnected = true;
 951                                         drain_msg_events_on_disconnect!(2);
 952                                 }
 953                         },
 954                         0x0e => {
 955                                 if chan_a_disconnected {
 956                                         nodes[0].peer_connected(&nodes[1].get_our_node_id(), &Init { features: channelmanager::provided_init_features(), remote_network_address: None }).unwrap();
 957                                         nodes[1].peer_connected(&nodes[0].get_our_node_id(), &Init { features: channelmanager::provided_init_features(), remote_network_address: None }).unwrap();
 958                                         chan_a_disconnected = false;
 959                                 }
 960                         },
 961                         0x0f => {
 962                                 if chan_b_disconnected {
 963                                         nodes[1].peer_connected(&nodes[2].get_our_node_id(), &Init { features: channelmanager::provided_init_features(), remote_network_address: None }).unwrap();
 964                                         nodes[2].peer_connected(&nodes[1].get_our_node_id(), &Init { features: channelmanager::provided_init_features(), remote_network_address: None }).unwrap();
 965                                         chan_b_disconnected = false;
 966                                 }
 967                         },
 968
 969                         0x10 => { process_msg_events!(0, true, ProcessMessages::AllMessages); },
 970                         0x11 => { process_msg_events!(0, false, ProcessMessages::AllMessages); },
 971                         0x12 => { process_msg_events!(0, true, ProcessMessages::OneMessage); },
 972                         0x13 => { process_msg_events!(0, false, ProcessMessages::OneMessage); },
 973                         0x14 => { process_msg_events!(0, true, ProcessMessages::OnePendingMessage); },
 974                         0x15 => { process_msg_events!(0, false, ProcessMessages::OnePendingMessage); },
 975
 976                         0x16 => { process_events!(0, true); },
 977                         0x17 => { process_events!(0, false); },
 978
 979                         0x18 => { process_msg_events!(1, true, ProcessMessages::AllMessages); },
 980                         0x19 => { process_msg_events!(1, false, ProcessMessages::AllMessages); },
 981                         0x1a => { process_msg_events!(1, true, ProcessMessages::OneMessage); },
 982                         0x1b => { process_msg_events!(1, false, ProcessMessages::OneMessage); },
 983                         0x1c => { process_msg_events!(1, true, ProcessMessages::OnePendingMessage); },
 984                         0x1d => { process_msg_events!(1, false, ProcessMessages::OnePendingMessage); },
 985
 986                         0x1e => { process_events!(1, true); },
 987                         0x1f => { process_events!(1, false); },
 988
 989                         0x20 => { process_msg_events!(2, true, ProcessMessages::AllMessages); },
 990                         0x21 => { process_msg_events!(2, false, ProcessMessages::AllMessages); },
 991                         0x22 => { process_msg_events!(2, true, ProcessMessages::OneMessage); },
 992                         0x23 => { process_msg_events!(2, false, ProcessMessages::OneMessage); },
 993                         0x24 => { process_msg_events!(2, true, ProcessMessages::OnePendingMessage); },
 994                         0x25 => { process_msg_events!(2, false, ProcessMessages::OnePendingMessage); },
 995
 996                         0x26 => { process_events!(2, true); },
 997                         0x27 => { process_events!(2, false); },
 998
 999                         0x2c => {
1000                                 if !chan_a_disconnected {
1001                                         nodes[1].peer_disconnected(&nodes[0].get_our_node_id(), false);
1002                                         chan_a_disconnected = true;
1003                                         drain_msg_events_on_disconnect!(0);
1004                                 }
1005                                 if monitor_a.should_update_manager.load(atomic::Ordering::Relaxed) {
1006                                         node_a_ser.0.clear();
1007                                         nodes[0].write(&mut node_a_ser).unwrap();
1008                                 }
1009                                 let (new_node_a, new_monitor_a) = reload_node!(node_a_ser, 0, monitor_a, keys_manager_a, fee_est_a);
1010                                 nodes[0] = new_node_a;
1011                                 monitor_a = new_monitor_a;
1012                         },
1013                         0x2d => {
1014                                 if !chan_a_disconnected {
1015                                         nodes[0].peer_disconnected(&nodes[1].get_our_node_id(), false);
1016                                         chan_a_disconnected = true;
1017                                         nodes[0].get_and_clear_pending_msg_events();
1018                                         ab_events.clear();
1019                                         ba_events.clear();
1020                                 }
1021                                 if !chan_b_disconnected {
1022                                         nodes[2].peer_disconnected(&nodes[1].get_our_node_id(), false);
1023                                         chan_b_disconnected = true;
1024                                         nodes[2].get_and_clear_pending_msg_events();
1025                                         bc_events.clear();
1026                                         cb_events.clear();
1027                                 }
1028                                 let (new_node_b, new_monitor_b) = reload_node!(node_b_ser, 1, monitor_b, keys_manager_b, fee_est_b);
1029                                 nodes[1] = new_node_b;
1030                                 monitor_b = new_monitor_b;
1031                         },
1032                         0x2e => {
1033                                 if !chan_b_disconnected {
1034                                         nodes[1].peer_disconnected(&nodes[2].get_our_node_id(), false);
1035                                         chan_b_disconnected = true;
1036                                         drain_msg_events_on_disconnect!(2);
1037                                 }
1038                                 if monitor_c.should_update_manager.load(atomic::Ordering::Relaxed) {
1039                                         node_c_ser.0.clear();
1040                                         nodes[2].write(&mut node_c_ser).unwrap();
1041                                 }
1042                                 let (new_node_c, new_monitor_c) = reload_node!(node_c_ser, 2, monitor_c, keys_manager_c, fee_est_c);
1043                                 nodes[2] = new_node_c;
1044                                 monitor_c = new_monitor_c;
1045                         },
1046
1047                         // 1/10th the channel size:
1048                         0x30 => { send_payment(&nodes[0], &nodes[1], chan_a, 10_000_000, &mut payment_id, &mut payment_idx); },
1049                         0x31 => { send_payment(&nodes[1], &nodes[0], chan_a, 10_000_000, &mut payment_id, &mut payment_idx); },
1050                         0x32 => { send_payment(&nodes[1], &nodes[2], chan_b, 10_000_000, &mut payment_id, &mut payment_idx); },
1051                         0x33 => { send_payment(&nodes[2], &nodes[1], chan_b, 10_000_000, &mut payment_id, &mut payment_idx); },
1052                         0x34 => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 10_000_000, &mut payment_id, &mut payment_idx); },
1053                         0x35 => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 10_000_000, &mut payment_id, &mut payment_idx); },
1054
1055                         0x38 => { send_payment(&nodes[0], &nodes[1], chan_a, 1_000_000, &mut payment_id, &mut payment_idx); },
1056                         0x39 => { send_payment(&nodes[1], &nodes[0], chan_a, 1_000_000, &mut payment_id, &mut payment_idx); },
1057                         0x3a => { send_payment(&nodes[1], &nodes[2], chan_b, 1_000_000, &mut payment_id, &mut payment_idx); },
1058                         0x3b => { send_payment(&nodes[2], &nodes[1], chan_b, 1_000_000, &mut payment_id, &mut payment_idx); },
1059                         0x3c => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 1_000_000, &mut payment_id, &mut payment_idx); },
1060                         0x3d => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 1_000_000, &mut payment_id, &mut payment_idx); },
1061
1062                         0x40 => { send_payment(&nodes[0], &nodes[1], chan_a, 100_000, &mut payment_id, &mut payment_idx); },
1063                         0x41 => { send_payment(&nodes[1], &nodes[0], chan_a, 100_000, &mut payment_id, &mut payment_idx); },
1064                         0x42 => { send_payment(&nodes[1], &nodes[2], chan_b, 100_000, &mut payment_id, &mut payment_idx); },
1065                         0x43 => { send_payment(&nodes[2], &nodes[1], chan_b, 100_000, &mut payment_id, &mut payment_idx); },
1066                         0x44 => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 100_000, &mut payment_id, &mut payment_idx); },
1067                         0x45 => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 100_000, &mut payment_id, &mut payment_idx); },
1068
1069                         0x48 => { send_payment(&nodes[0], &nodes[1], chan_a, 10_000, &mut payment_id, &mut payment_idx); },
1070                         0x49 => { send_payment(&nodes[1], &nodes[0], chan_a, 10_000, &mut payment_id, &mut payment_idx); },
1071                         0x4a => { send_payment(&nodes[1], &nodes[2], chan_b, 10_000, &mut payment_id, &mut payment_idx); },
1072                         0x4b => { send_payment(&nodes[2], &nodes[1], chan_b, 10_000, &mut payment_id, &mut payment_idx); },
1073                         0x4c => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 10_000, &mut payment_id, &mut payment_idx); },
1074                         0x4d => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 10_000, &mut payment_id, &mut payment_idx); },
1075
1076                         0x50 => { send_payment(&nodes[0], &nodes[1], chan_a, 1_000, &mut payment_id, &mut payment_idx); },
1077                         0x51 => { send_payment(&nodes[1], &nodes[0], chan_a, 1_000, &mut payment_id, &mut payment_idx); },
1078                         0x52 => { send_payment(&nodes[1], &nodes[2], chan_b, 1_000, &mut payment_id, &mut payment_idx); },
1079                         0x53 => { send_payment(&nodes[2], &nodes[1], chan_b, 1_000, &mut payment_id, &mut payment_idx); },
1080                         0x54 => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 1_000, &mut payment_id, &mut payment_idx); },
1081                         0x55 => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 1_000, &mut payment_id, &mut payment_idx); },
1082
1083                         0x58 => { send_payment(&nodes[0], &nodes[1], chan_a, 100, &mut payment_id, &mut payment_idx); },
1084                         0x59 => { send_payment(&nodes[1], &nodes[0], chan_a, 100, &mut payment_id, &mut payment_idx); },
1085                         0x5a => { send_payment(&nodes[1], &nodes[2], chan_b, 100, &mut payment_id, &mut payment_idx); },
1086                         0x5b => { send_payment(&nodes[2], &nodes[1], chan_b, 100, &mut payment_id, &mut payment_idx); },
1087                         0x5c => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 100, &mut payment_id, &mut payment_idx); },
1088                         0x5d => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 100, &mut payment_id, &mut payment_idx); },
1089
1090                         0x60 => { send_payment(&nodes[0], &nodes[1], chan_a, 10, &mut payment_id, &mut payment_idx); },
1091                         0x61 => { send_payment(&nodes[1], &nodes[0], chan_a, 10, &mut payment_id, &mut payment_idx); },
1092                         0x62 => { send_payment(&nodes[1], &nodes[2], chan_b, 10, &mut payment_id, &mut payment_idx); },
1093                         0x63 => { send_payment(&nodes[2], &nodes[1], chan_b, 10, &mut payment_id, &mut payment_idx); },
1094                         0x64 => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 10, &mut payment_id, &mut payment_idx); },
1095                         0x65 => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 10, &mut payment_id, &mut payment_idx); },
1096
1097                         0x68 => { send_payment(&nodes[0], &nodes[1], chan_a, 1, &mut payment_id, &mut payment_idx); },
1098                         0x69 => { send_payment(&nodes[1], &nodes[0], chan_a, 1, &mut payment_id, &mut payment_idx); },
1099                         0x6a => { send_payment(&nodes[1], &nodes[2], chan_b, 1, &mut payment_id, &mut payment_idx); },
1100                         0x6b => { send_payment(&nodes[2], &nodes[1], chan_b, 1, &mut payment_id, &mut payment_idx); },
1101                         0x6c => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 1, &mut payment_id, &mut payment_idx); },
1102                         0x6d => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 1, &mut payment_id, &mut payment_idx); },
1103
1104                         0x80 => {
1105                                 let max_feerate = last_htlc_clear_fee_a * FEE_SPIKE_BUFFER_FEE_INCREASE_MULTIPLE as u32;
1106                                 if fee_est_a.ret_val.fetch_add(250, atomic::Ordering::AcqRel) + 250 > max_feerate {
1107                                         fee_est_a.ret_val.store(max_feerate, atomic::Ordering::Release);
1108                                 }
1109                                 nodes[0].maybe_update_chan_fees();
1110                         },
1111                         0x81 => { fee_est_a.ret_val.store(253, atomic::Ordering::Release); nodes[0].maybe_update_chan_fees(); },
1112
1113                         0x84 => {
1114                                 let max_feerate = last_htlc_clear_fee_b * FEE_SPIKE_BUFFER_FEE_INCREASE_MULTIPLE as u32;
1115                                 if fee_est_b.ret_val.fetch_add(250, atomic::Ordering::AcqRel) + 250 > max_feerate {
1116                                         fee_est_b.ret_val.store(max_feerate, atomic::Ordering::Release);
1117                                 }
1118                                 nodes[1].maybe_update_chan_fees();
1119                         },
1120                         0x85 => { fee_est_b.ret_val.store(253, atomic::Ordering::Release); nodes[1].maybe_update_chan_fees(); },
1121
1122                         0x88 => {
1123                                 let max_feerate = last_htlc_clear_fee_c * FEE_SPIKE_BUFFER_FEE_INCREASE_MULTIPLE as u32;
1124                                 if fee_est_c.ret_val.fetch_add(250, atomic::Ordering::AcqRel) + 250 > max_feerate {
1125                                         fee_est_c.ret_val.store(max_feerate, atomic::Ordering::Release);
1126                                 }
1127                                 nodes[2].maybe_update_chan_fees();
1128                         },
1129                         0x89 => { fee_est_c.ret_val.store(253, atomic::Ordering::Release); nodes[2].maybe_update_chan_fees(); },
1130
1131                         0xff => {
1132                                 // Test that no channel is in a stuck state where neither party can send funds even
1133                                 // after we resolve all pending events.
1134                                 // First make sure there are no pending monitor updates, resetting the error state
1135                                 // and calling force_channel_monitor_updated for each monitor.
1136                                 *monitor_a.persister.update_ret.lock().unwrap() = ChannelMonitorUpdateStatus::Completed;
1137                                 *monitor_b.persister.update_ret.lock().unwrap() = ChannelMonitorUpdateStatus::Completed;
1138                                 *monitor_c.persister.update_ret.lock().unwrap() = ChannelMonitorUpdateStatus::Completed;
1139
1140                                 if let Some((id, _)) = monitor_a.latest_monitors.lock().unwrap().get(&chan_1_funding) {
1141                                         monitor_a.chain_monitor.force_channel_monitor_updated(chan_1_funding, *id);
1142                                         nodes[0].process_monitor_events();
1143                                 }
1144                                 if let Some((id, _)) = monitor_b.latest_monitors.lock().unwrap().get(&chan_1_funding) {
1145                                         monitor_b.chain_monitor.force_channel_monitor_updated(chan_1_funding, *id);
1146                                         nodes[1].process_monitor_events();
1147                                 }
1148                                 if let Some((id, _)) = monitor_b.latest_monitors.lock().unwrap().get(&chan_2_funding) {
1149                                         monitor_b.chain_monitor.force_channel_monitor_updated(chan_2_funding, *id);
1150                                         nodes[1].process_monitor_events();
1151                                 }
1152                                 if let Some((id, _)) = monitor_c.latest_monitors.lock().unwrap().get(&chan_2_funding) {
1153                                         monitor_c.chain_monitor.force_channel_monitor_updated(chan_2_funding, *id);
1154                                         nodes[2].process_monitor_events();
1155                                 }
1156
1157                                 // Next, make sure peers are all connected to each other
1158                                 if chan_a_disconnected {
1159                                         nodes[0].peer_connected(&nodes[1].get_our_node_id(), &Init { features: channelmanager::provided_init_features(), remote_network_address: None }).unwrap();
1160                                         nodes[1].peer_connected(&nodes[0].get_our_node_id(), &Init { features: channelmanager::provided_init_features(), remote_network_address: None }).unwrap();
1161                                         chan_a_disconnected = false;
1162                                 }
1163                                 if chan_b_disconnected {
1164                                         nodes[1].peer_connected(&nodes[2].get_our_node_id(), &Init { features: channelmanager::provided_init_features(), remote_network_address: None }).unwrap();
1165                                         nodes[2].peer_connected(&nodes[1].get_our_node_id(), &Init { features: channelmanager::provided_init_features(), remote_network_address: None }).unwrap();
1166                                         chan_b_disconnected = false;
1167                                 }
1168
1169                                 for i in 0..std::usize::MAX {
1170                                         if i == 100 { panic!("It may take may iterations to settle the state, but it should not take forever"); }
1171                                         // Then, make sure any current forwards make their way to their destination
1172                                         if process_msg_events!(0, false, ProcessMessages::AllMessages) { continue; }
1173                                         if process_msg_events!(1, false, ProcessMessages::AllMessages) { continue; }
1174                                         if process_msg_events!(2, false, ProcessMessages::AllMessages) { continue; }
1175                                         // ...making sure any pending PendingHTLCsForwardable events are handled and
1176                                         // payments claimed.
1177                                         if process_events!(0, false) { continue; }
1178                                         if process_events!(1, false) { continue; }
1179                                         if process_events!(2, false) { continue; }
1180                                         break;
1181                                 }
1182
1183                                 // Finally, make sure that at least one end of each channel can make a substantial payment
1184                                 assert!(
1185                                         send_payment(&nodes[0], &nodes[1], chan_a, 10_000_000, &mut payment_id, &mut payment_idx) ||
1186                                         send_payment(&nodes[1], &nodes[0], chan_a, 10_000_000, &mut payment_id, &mut payment_idx));
1187                                 assert!(
1188                                         send_payment(&nodes[1], &nodes[2], chan_b, 10_000_000, &mut payment_id, &mut payment_idx) ||
1189                                         send_payment(&nodes[2], &nodes[1], chan_b, 10_000_000, &mut payment_id, &mut payment_idx));
1190
1191                                 last_htlc_clear_fee_a = fee_est_a.ret_val.load(atomic::Ordering::Acquire);
1192                                 last_htlc_clear_fee_b = fee_est_b.ret_val.load(atomic::Ordering::Acquire);
1193                                 last_htlc_clear_fee_c = fee_est_c.ret_val.load(atomic::Ordering::Acquire);
1194                         },
1195                         _ => test_return!(),
1196                 }
1197
1198                 node_a_ser.0.clear();
1199                 nodes[0].write(&mut node_a_ser).unwrap();
1200                 monitor_a.should_update_manager.store(false, atomic::Ordering::Relaxed);
1201                 node_b_ser.0.clear();
1202                 nodes[1].write(&mut node_b_ser).unwrap();
1203                 monitor_b.should_update_manager.store(false, atomic::Ordering::Relaxed);
1204                 node_c_ser.0.clear();
1205                 nodes[2].write(&mut node_c_ser).unwrap();
1206                 monitor_c.should_update_manager.store(false, atomic::Ordering::Relaxed);
1207         }
1208 }
1209
1210 /// We actually have different behavior based on if a certain log string has been seen, so we have
1211 /// to do a bit more tracking.
1212 #[derive(Clone)]
1213 struct SearchingOutput<O: Output> {
1214         output: O,
1215         may_fail: Arc<atomic::AtomicBool>,
1216 }
1217 impl<O: Output> Output for SearchingOutput<O> {
1218         fn locked_write(&self, data: &[u8]) {
1219                 // We hit a design limitation of LN state machine (see CONCURRENT_INBOUND_HTLC_FEE_BUFFER)
1220                 if std::str::from_utf8(data).unwrap().contains("Outbound update_fee HTLC buffer overflow - counterparty should force-close this channel") {
1221                         self.may_fail.store(true, atomic::Ordering::Release);
1222                 }
1223                 self.output.locked_write(data)
1224         }
1225 }
1226 impl<O: Output> SearchingOutput<O> {
1227         pub fn new(output: O) -> Self {
1228                 Self { output, may_fail: Arc::new(atomic::AtomicBool::new(false)) }
1229         }
1230 }
1231
1232 pub fn chanmon_consistency_test<Out: Output>(data: &[u8], out: Out) {
1233         do_test(data, out);
1234 }
1235
1236 #[no_mangle]
1237 pub extern "C" fn chanmon_consistency_run(data: *const u8, datalen: usize) {
1238         do_test(unsafe { std::slice::from_raw_parts(data, datalen) }, test_logger::DevNull{});
1239 }