git.bitcoin.ninja Git - rust-lightning/blob - fuzz/src/chanmon_consistency.rs

   1 // This file is Copyright its original authors, visible in version control
   2 // history.
   3 //
   4 // This file is licensed under the Apache License, Version 2.0 <LICENSE-APACHE
   5 // or http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   6 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your option.
   7 // You may not use this file except in accordance with one or both of these
   8 // licenses.
   9
  10 //! Test that monitor update failures don't get our channel state out of sync.
  11 //! One of the biggest concern with the monitor update failure handling code is that messages
  12 //! resent after monitor updating is restored are delivered out-of-order, resulting in
  13 //! commitment_signed messages having "invalid signatures".
  14 //! To test this we stand up a network of three nodes and read bytes from the fuzz input to denote
  15 //! actions such as sending payments, handling events, or changing monitor update return values on
  16 //! a per-node basis. This should allow it to find any cases where the ordering of actions results
  17 //! in us getting out of sync with ourselves, and, assuming at least one of our recieve- or
  18 //! send-side handling is correct, other peers. We consider it a failure if any action results in a
  19 //! channel being force-closed.
  20
  21 use bitcoin::blockdata::constants::genesis_block;
  22 use bitcoin::blockdata::transaction::{Transaction, TxOut};
  23 use bitcoin::blockdata::script::{Builder, ScriptBuf};
  24 use bitcoin::blockdata::opcodes;
  25 use bitcoin::blockdata::locktime::absolute::LockTime;
  26 use bitcoin::network::constants::Network;
  27
  28 use bitcoin::hashes::Hash as TraitImport;
  29 use bitcoin::hashes::sha256::Hash as Sha256;
  30 use bitcoin::hashes::sha256d::Hash as Sha256dHash;
  31 use bitcoin::hash_types::{BlockHash, WPubkeyHash};
  32
  33 use lightning::blinded_path::BlindedPath;
  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::sign::{KeyMaterial, InMemorySigner, Recipient, EntropySource, NodeSigner, SignerProvider};
  40 use lightning::events;
  41 use lightning::events::MessageSendEventsProvider;
  42 use lightning::ln::{PaymentHash, PaymentPreimage, PaymentSecret};
  43 use lightning::ln::channelmanager::{ChainParameters, ChannelDetails, ChannelManager, PaymentSendFailure, ChannelManagerReadArgs, PaymentId, RecipientOnionFields};
  44 use lightning::ln::channel::FEE_SPIKE_BUFFER_FEE_INCREASE_MULTIPLE;
  45 use lightning::ln::msgs::{self, CommitmentUpdate, ChannelMessageHandler, DecodeError, UpdateAddHTLC, Init};
  46 use lightning::ln::script::ShutdownScript;
  47 use lightning::ln::functional_test_utils::*;
  48 use lightning::offers::invoice::UnsignedBolt12Invoice;
  49 use lightning::offers::invoice_request::UnsignedInvoiceRequest;
  50 use lightning::onion_message::{Destination, MessageRouter, OnionMessagePath};
  51 use lightning::util::test_channel_signer::{TestChannelSigner, EnforcementState};
  52 use lightning::util::errors::APIError;
  53 use lightning::util::logger::Logger;
  54 use lightning::util::config::UserConfig;
  55 use lightning::util::ser::{Readable, ReadableArgs, Writeable, Writer};
  56 use lightning::routing::router::{InFlightHtlcs, Path, Route, RouteHop, RouteParameters, Router};
  57
  58 use crate::utils::test_logger::{self, Output};
  59 use crate::utils::test_persister::TestPersister;
  60
  61 use bitcoin::secp256k1::{Message, PublicKey, SecretKey, Scalar, Secp256k1, self};
  62 use bitcoin::secp256k1::ecdh::SharedSecret;
  63 use bitcoin::secp256k1::ecdsa::{RecoverableSignature, Signature};
  64 use bitcoin::secp256k1::schnorr;
  65
  66 use std::mem;
  67 use std::cmp::{self, Ordering};
  68 use hashbrown::{HashSet, hash_map, HashMap};
  69 use std::sync::{Arc,Mutex};
  70 use std::sync::atomic;
  71 use std::io::Cursor;
  72 use bitcoin::bech32::u5;
  73
  74 const MAX_FEE: u32 = 10_000;
  75 struct FuzzEstimator {
  76         ret_val: atomic::AtomicU32,
  77 }
  78 impl FeeEstimator for FuzzEstimator {
  79         fn get_est_sat_per_1000_weight(&self, conf_target: ConfirmationTarget) -> u32 {
  80                 // We force-close channels if our counterparty sends us a feerate which is a small multiple
  81                 // of our HighPriority fee estimate or smaller than our Background fee estimate. Thus, we
  82                 // always return a HighPriority feerate here which is >= the maximum Normal feerate and a
  83                 // Background feerate which is <= the minimum Normal feerate.
  84                 match conf_target {
  85                         ConfirmationTarget::OnChainSweep => MAX_FEE,
  86                         ConfirmationTarget::ChannelCloseMinimum|ConfirmationTarget::AnchorChannelFee|ConfirmationTarget::MinAllowedAnchorChannelRemoteFee|ConfirmationTarget::MinAllowedNonAnchorChannelRemoteFee => 253,
  87                         ConfirmationTarget::NonAnchorChannelFee => cmp::min(self.ret_val.load(atomic::Ordering::Acquire), MAX_FEE),
  88                 }
  89         }
  90 }
  91
  92 struct FuzzRouter {}
  93
  94 impl Router for FuzzRouter {
  95         fn find_route(
  96                 &self, _payer: &PublicKey, _params: &RouteParameters, _first_hops: Option<&[&ChannelDetails]>,
  97                 _inflight_htlcs: InFlightHtlcs
  98         ) -> Result<Route, msgs::LightningError> {
  99                 Err(msgs::LightningError {
 100                         err: String::from("Not implemented"),
 101                         action: msgs::ErrorAction::IgnoreError
 102                 })
 103         }
 104 }
 105
 106 impl MessageRouter for FuzzRouter {
 107         fn find_path(
 108                 &self, _sender: PublicKey, _peers: Vec<PublicKey>, _destination: Destination
 109         ) -> Result<OnionMessagePath, ()> {
 110                 unreachable!()
 111         }
 112
 113         fn create_blinded_paths<
 114                 ES: EntropySource + ?Sized, T: secp256k1::Signing + secp256k1::Verification
 115         >(
 116                 &self, _recipient: PublicKey, _peers: Vec<PublicKey>, _entropy_source: &ES,
 117                 _secp_ctx: &Secp256k1<T>
 118         ) -> Result<Vec<BlindedPath>, ()> {
 119                 unreachable!()
 120         }
 121 }
 122
 123 pub struct TestBroadcaster {}
 124 impl BroadcasterInterface for TestBroadcaster {
 125         fn broadcast_transactions(&self, _txs: &[&Transaction]) { }
 126 }
 127
 128 pub struct VecWriter(pub Vec<u8>);
 129 impl Writer for VecWriter {
 130         fn write_all(&mut self, buf: &[u8]) -> Result<(), ::std::io::Error> {
 131                 self.0.extend_from_slice(buf);
 132                 Ok(())
 133         }
 134 }
 135
 136 struct TestChainMonitor {
 137         pub logger: Arc<dyn Logger>,
 138         pub keys: Arc<KeyProvider>,
 139         pub persister: Arc<TestPersister>,
 140         pub chain_monitor: Arc<chainmonitor::ChainMonitor<TestChannelSigner, Arc<dyn chain::Filter>, Arc<TestBroadcaster>, Arc<FuzzEstimator>, Arc<dyn Logger>, Arc<TestPersister>>>,
 141         // If we reload a node with an old copy of ChannelMonitors, the ChannelManager deserialization
 142         // logic will automatically force-close our channels for us (as we don't have an up-to-date
 143         // monitor implying we are not able to punish misbehaving counterparties). Because this test
 144         // "fails" if we ever force-close a channel, we avoid doing so, always saving the latest
 145         // fully-serialized monitor state here, as well as the corresponding update_id.
 146         pub latest_monitors: Mutex<HashMap<OutPoint, (u64, Vec<u8>)>>,
 147 }
 148 impl TestChainMonitor {
 149         pub fn new(broadcaster: Arc<TestBroadcaster>, logger: Arc<dyn Logger>, feeest: Arc<FuzzEstimator>, persister: Arc<TestPersister>, keys: Arc<KeyProvider>) -> Self {
 150                 Self {
 151                         chain_monitor: Arc::new(chainmonitor::ChainMonitor::new(None, broadcaster, logger.clone(), feeest, Arc::clone(&persister))),
 152                         logger,
 153                         keys,
 154                         persister,
 155                         latest_monitors: Mutex::new(HashMap::new()),
 156                 }
 157         }
 158 }
 159 impl chain::Watch<TestChannelSigner> for TestChainMonitor {
 160         fn watch_channel(&self, funding_txo: OutPoint, monitor: channelmonitor::ChannelMonitor<TestChannelSigner>) -> Result<chain::ChannelMonitorUpdateStatus, ()> {
 161                 let mut ser = VecWriter(Vec::new());
 162                 monitor.write(&mut ser).unwrap();
 163                 if let Some(_) = self.latest_monitors.lock().unwrap().insert(funding_txo, (monitor.get_latest_update_id(), ser.0)) {
 164                         panic!("Already had monitor pre-watch_channel");
 165                 }
 166                 self.chain_monitor.watch_channel(funding_txo, monitor)
 167         }
 168
 169         fn update_channel(&self, funding_txo: OutPoint, update: &channelmonitor::ChannelMonitorUpdate) -> chain::ChannelMonitorUpdateStatus {
 170                 let mut map_lock = self.latest_monitors.lock().unwrap();
 171                 let mut map_entry = match map_lock.entry(funding_txo) {
 172                         hash_map::Entry::Occupied(entry) => entry,
 173                         hash_map::Entry::Vacant(_) => panic!("Didn't have monitor on update call"),
 174                 };
 175                 let deserialized_monitor = <(BlockHash, channelmonitor::ChannelMonitor<TestChannelSigner>)>::
 176                         read(&mut Cursor::new(&map_entry.get().1), (&*self.keys, &*self.keys)).unwrap().1;
 177                 deserialized_monitor.update_monitor(update, &&TestBroadcaster{}, &&FuzzEstimator { ret_val: atomic::AtomicU32::new(253) }, &self.logger).unwrap();
 178                 let mut ser = VecWriter(Vec::new());
 179                 deserialized_monitor.write(&mut ser).unwrap();
 180                 map_entry.insert((update.update_id, ser.0));
 181                 self.chain_monitor.update_channel(funding_txo, update)
 182         }
 183
 184         fn release_pending_monitor_events(&self) -> Vec<(OutPoint, Vec<MonitorEvent>, Option<PublicKey>)> {
 185                 return self.chain_monitor.release_pending_monitor_events();
 186         }
 187 }
 188
 189 struct KeyProvider {
 190         node_secret: SecretKey,
 191         rand_bytes_id: atomic::AtomicU32,
 192         enforcement_states: Mutex<HashMap<[u8;32], Arc<Mutex<EnforcementState>>>>,
 193 }
 194
 195 impl EntropySource for KeyProvider {
 196         fn get_secure_random_bytes(&self) -> [u8; 32] {
 197                 let id = self.rand_bytes_id.fetch_add(1, atomic::Ordering::Relaxed);
 198                 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_secret[31]];
 199                 res[30-4..30].copy_from_slice(&id.to_le_bytes());
 200                 res
 201         }
 202 }
 203
 204 impl NodeSigner for KeyProvider {
 205         fn get_node_id(&self, recipient: Recipient) -> Result<PublicKey, ()> {
 206                 let node_secret = match recipient {
 207                         Recipient::Node => Ok(&self.node_secret),
 208                         Recipient::PhantomNode => Err(())
 209                 }?;
 210                 Ok(PublicKey::from_secret_key(&Secp256k1::signing_only(), node_secret))
 211         }
 212
 213         fn ecdh(&self, recipient: Recipient, other_key: &PublicKey, tweak: Option<&Scalar>) -> Result<SharedSecret, ()> {
 214                 let mut node_secret = match recipient {
 215                         Recipient::Node => Ok(self.node_secret.clone()),
 216                         Recipient::PhantomNode => Err(())
 217                 }?;
 218                 if let Some(tweak) = tweak {
 219                         node_secret = node_secret.mul_tweak(tweak).map_err(|_| ())?;
 220                 }
 221                 Ok(SharedSecret::new(other_key, &node_secret))
 222         }
 223
 224         fn get_inbound_payment_key_material(&self) -> KeyMaterial {
 225                 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_secret[31]])
 226         }
 227
 228         fn sign_invoice(&self, _hrp_bytes: &[u8], _invoice_data: &[u5], _recipient: Recipient) -> Result<RecoverableSignature, ()> {
 229                 unreachable!()
 230         }
 231
 232         fn sign_bolt12_invoice_request(
 233                 &self, _invoice_request: &UnsignedInvoiceRequest
 234         ) -> Result<schnorr::Signature, ()> {
 235                 unreachable!()
 236         }
 237
 238         fn sign_bolt12_invoice(
 239                 &self, _invoice: &UnsignedBolt12Invoice,
 240         ) -> Result<schnorr::Signature, ()> {
 241                 unreachable!()
 242         }
 243
 244         fn sign_gossip_message(&self, msg: lightning::ln::msgs::UnsignedGossipMessage) -> Result<Signature, ()> {
 245                 let msg_hash = Message::from_slice(&Sha256dHash::hash(&msg.encode()[..])[..]).map_err(|_| ())?;
 246                 let secp_ctx = Secp256k1::signing_only();
 247                 Ok(secp_ctx.sign_ecdsa(&msg_hash, &self.node_secret))
 248         }
 249 }
 250
 251 impl SignerProvider for KeyProvider {
 252         type EcdsaSigner = TestChannelSigner;
 253         #[cfg(taproot)]
 254         type TaprootSigner = TestChannelSigner;
 255
 256         fn generate_channel_keys_id(&self, _inbound: bool, _channel_value_satoshis: u64, _user_channel_id: u128) -> [u8; 32] {
 257                 let id = self.rand_bytes_id.fetch_add(1, atomic::Ordering::Relaxed) as u8;
 258                 [id; 32]
 259         }
 260
 261         fn derive_channel_signer(&self, channel_value_satoshis: u64, channel_keys_id: [u8; 32]) -> Self::EcdsaSigner {
 262                 let secp_ctx = Secp256k1::signing_only();
 263                 let id = channel_keys_id[0];
 264                 let keys = InMemorySigner::new(
 265                         &secp_ctx,
 266                         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_secret[31]]).unwrap(),
 267                         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_secret[31]]).unwrap(),
 268                         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_secret[31]]).unwrap(),
 269                         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_secret[31]]).unwrap(),
 270                         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_secret[31]]).unwrap(),
 271                         [id, 0, 0, 0, 0, 0, 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_secret[31]],
 272                         channel_value_satoshis,
 273                         channel_keys_id,
 274                         channel_keys_id,
 275                 );
 276                 let revoked_commitment = self.make_enforcement_state_cell(keys.commitment_seed);
 277                 TestChannelSigner::new_with_revoked(keys, revoked_commitment, false)
 278         }
 279
 280         fn read_chan_signer(&self, buffer: &[u8]) -> Result<Self::EcdsaSigner, DecodeError> {
 281                 let mut reader = std::io::Cursor::new(buffer);
 282
 283                 let inner: InMemorySigner = ReadableArgs::read(&mut reader, self)?;
 284                 let state = self.make_enforcement_state_cell(inner.commitment_seed);
 285
 286                 Ok(TestChannelSigner {
 287                         inner,
 288                         state,
 289                         disable_revocation_policy_check: false,
 290                         available: Arc::new(Mutex::new(true)),
 291                 })
 292         }
 293
 294         fn get_destination_script(&self, _channel_keys_id: [u8; 32]) -> Result<ScriptBuf, ()> {
 295                 let secp_ctx = Secp256k1::signing_only();
 296                 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_secret[31]]).unwrap();
 297                 let our_channel_monitor_claim_key_hash = WPubkeyHash::hash(&PublicKey::from_secret_key(&secp_ctx, &channel_monitor_claim_key).serialize());
 298                 Ok(Builder::new().push_opcode(opcodes::all::OP_PUSHBYTES_0).push_slice(our_channel_monitor_claim_key_hash).into_script())
 299         }
 300
 301         fn get_shutdown_scriptpubkey(&self) -> Result<ShutdownScript, ()> {
 302                 let secp_ctx = Secp256k1::signing_only();
 303                 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_secret[31]]).unwrap();
 304                 let pubkey_hash = WPubkeyHash::hash(&PublicKey::from_secret_key(&secp_ctx, &secret_key).serialize());
 305                 Ok(ShutdownScript::new_p2wpkh(&pubkey_hash))
 306         }
 307 }
 308
 309 impl KeyProvider {
 310         fn make_enforcement_state_cell(&self, commitment_seed: [u8; 32]) -> Arc<Mutex<EnforcementState>> {
 311                 let mut revoked_commitments = self.enforcement_states.lock().unwrap();
 312                 if !revoked_commitments.contains_key(&commitment_seed) {
 313                         revoked_commitments.insert(commitment_seed, Arc::new(Mutex::new(EnforcementState::new())));
 314                 }
 315                 let cell = revoked_commitments.get(&commitment_seed).unwrap();
 316                 Arc::clone(cell)
 317         }
 318 }
 319
 320 #[inline]
 321 fn check_api_err(api_err: APIError, sendable_bounds_violated: bool) {
 322         match api_err {
 323                 APIError::APIMisuseError { .. } => panic!("We can't misuse the API"),
 324                 APIError::FeeRateTooHigh { .. } => panic!("We can't send too much fee?"),
 325                 APIError::InvalidRoute { .. } => panic!("Our routes should work"),
 326                 APIError::ChannelUnavailable { err } => {
 327                         // Test the error against a list of errors we can hit, and reject
 328                         // all others. If you hit this panic, the list of acceptable errors
 329                         // is probably just stale and you should add new messages here.
 330                         match err.as_str() {
 331                                 "Peer for first hop currently disconnected" => {},
 332                                 _ if err.starts_with("Cannot send less than our next-HTLC minimum - ") => {},
 333                                 _ if err.starts_with("Cannot send more than our next-HTLC maximum - ") => {},
 334                                 _ => panic!("{}", err),
 335                         }
 336                         assert!(sendable_bounds_violated);
 337                 },
 338                 APIError::MonitorUpdateInProgress => {
 339                         // We can (obviously) temp-fail a monitor update
 340                 },
 341                 APIError::IncompatibleShutdownScript { .. } => panic!("Cannot send an incompatible shutdown script"),
 342         }
 343 }
 344 #[inline]
 345 fn check_payment_err(send_err: PaymentSendFailure, sendable_bounds_violated: bool) {
 346         match send_err {
 347                 PaymentSendFailure::ParameterError(api_err) => check_api_err(api_err, sendable_bounds_violated),
 348                 PaymentSendFailure::PathParameterError(per_path_results) => {
 349                         for res in per_path_results { if let Err(api_err) = res { check_api_err(api_err, sendable_bounds_violated); } }
 350                 },
 351                 PaymentSendFailure::AllFailedResendSafe(per_path_results) => {
 352                         for api_err in per_path_results { check_api_err(api_err, sendable_bounds_violated); }
 353                 },
 354                 PaymentSendFailure::PartialFailure { results, .. } => {
 355                         for res in results { if let Err(api_err) = res { check_api_err(api_err, sendable_bounds_violated); } }
 356                 },
 357                 PaymentSendFailure::DuplicatePayment => panic!(),
 358         }
 359 }
 360
 361 type ChanMan<'a> = ChannelManager<Arc<TestChainMonitor>, Arc<TestBroadcaster>, Arc<KeyProvider>, Arc<KeyProvider>, Arc<KeyProvider>, Arc<FuzzEstimator>, &'a FuzzRouter, Arc<dyn Logger>>;
 362
 363 #[inline]
 364 fn get_payment_secret_hash(dest: &ChanMan, payment_id: &mut u8) -> Option<(PaymentSecret, PaymentHash)> {
 365         let mut payment_hash;
 366         for _ in 0..256 {
 367                 payment_hash = PaymentHash(Sha256::hash(&[*payment_id; 1]).to_byte_array());
 368                 if let Ok(payment_secret) = dest.create_inbound_payment_for_hash(payment_hash, None, 3600, None) {
 369                         return Some((payment_secret, payment_hash));
 370                 }
 371                 *payment_id = payment_id.wrapping_add(1);
 372         }
 373         None
 374 }
 375
 376 #[inline]
 377 fn send_payment(source: &ChanMan, dest: &ChanMan, dest_chan_id: u64, amt: u64, payment_id: &mut u8, payment_idx: &mut u64) -> bool {
 378         let (payment_secret, payment_hash) =
 379                 if let Some((secret, hash)) = get_payment_secret_hash(dest, payment_id) { (secret, hash) } else { return true; };
 380         let mut payment_id = [0; 32];
 381         payment_id[0..8].copy_from_slice(&payment_idx.to_ne_bytes());
 382         *payment_idx += 1;
 383         let (min_value_sendable, max_value_sendable) = source.list_usable_channels()
 384                 .iter().find(|chan| chan.short_channel_id == Some(dest_chan_id))
 385                 .map(|chan|
 386                         (chan.next_outbound_htlc_minimum_msat, chan.next_outbound_htlc_limit_msat))
 387                 .unwrap_or((0, 0));
 388         if let Err(err) = source.send_payment_with_route(&Route {
 389                 paths: vec![Path { hops: vec![RouteHop {
 390                         pubkey: dest.get_our_node_id(),
 391                         node_features: dest.node_features(),
 392                         short_channel_id: dest_chan_id,
 393                         channel_features: dest.channel_features(),
 394                         fee_msat: amt,
 395                         cltv_expiry_delta: 200,
 396                         maybe_announced_channel: true,
 397                 }], blinded_tail: None }],
 398                 route_params: None,
 399         }, payment_hash, RecipientOnionFields::secret_only(payment_secret), PaymentId(payment_id)) {
 400                 check_payment_err(err, amt > max_value_sendable || amt < min_value_sendable);
 401                 false
 402         } else {
 403                 // Note that while the max is a strict upper-bound, we can occasionally send substantially
 404                 // below the minimum, with some gap which is unusable immediately below the minimum. Thus,
 405                 // we don't check against min_value_sendable here.
 406                 assert!(amt <= max_value_sendable);
 407                 true
 408         }
 409 }
 410 #[inline]
 411 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 {
 412         let (payment_secret, payment_hash) =
 413                 if let Some((secret, hash)) = get_payment_secret_hash(dest, payment_id) { (secret, hash) } else { return true; };
 414         let mut payment_id = [0; 32];
 415         payment_id[0..8].copy_from_slice(&payment_idx.to_ne_bytes());
 416         *payment_idx += 1;
 417         let (min_value_sendable, max_value_sendable) = source.list_usable_channels()
 418                 .iter().find(|chan| chan.short_channel_id == Some(middle_chan_id))
 419                 .map(|chan|
 420                         (chan.next_outbound_htlc_minimum_msat, chan.next_outbound_htlc_limit_msat))
 421                 .unwrap_or((0, 0));
 422         let first_hop_fee = 50_000;
 423         if let Err(err) = source.send_payment_with_route(&Route {
 424                 paths: vec![Path { hops: vec![RouteHop {
 425                         pubkey: middle.get_our_node_id(),
 426                         node_features: middle.node_features(),
 427                         short_channel_id: middle_chan_id,
 428                         channel_features: middle.channel_features(),
 429                         fee_msat: first_hop_fee,
 430                         cltv_expiry_delta: 100,
 431                         maybe_announced_channel: true,
 432                 }, RouteHop {
 433                         pubkey: dest.get_our_node_id(),
 434                         node_features: dest.node_features(),
 435                         short_channel_id: dest_chan_id,
 436                         channel_features: dest.channel_features(),
 437                         fee_msat: amt,
 438                         cltv_expiry_delta: 200,
 439                         maybe_announced_channel: true,
 440                 }], blinded_tail: None }],
 441                 route_params: None,
 442         }, payment_hash, RecipientOnionFields::secret_only(payment_secret), PaymentId(payment_id)) {
 443                 let sent_amt = amt + first_hop_fee;
 444                 check_payment_err(err, sent_amt < min_value_sendable || sent_amt > max_value_sendable);
 445                 false
 446         } else {
 447                 // Note that while the max is a strict upper-bound, we can occasionally send substantially
 448                 // below the minimum, with some gap which is unusable immediately below the minimum. Thus,
 449                 // we don't check against min_value_sendable here.
 450                 assert!(amt + first_hop_fee <= max_value_sendable);
 451                 true
 452         }
 453 }
 454
 455 #[inline]
 456 pub fn do_test<Out: Output>(data: &[u8], underlying_out: Out, anchors: bool) {
 457         let out = SearchingOutput::new(underlying_out);
 458         let broadcast = Arc::new(TestBroadcaster{});
 459         let router = FuzzRouter {};
 460
 461         macro_rules! make_node {
 462                 ($node_id: expr, $fee_estimator: expr) => { {
 463                         let logger: Arc<dyn Logger> = Arc::new(test_logger::TestLogger::new($node_id.to_string(), out.clone()));
 464                         let node_secret = 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, $node_id]).unwrap();
 465                         let keys_manager = Arc::new(KeyProvider { node_secret, rand_bytes_id: atomic::AtomicU32::new(0), enforcement_states: Mutex::new(HashMap::new()) });
 466                         let monitor = Arc::new(TestChainMonitor::new(broadcast.clone(), logger.clone(), $fee_estimator.clone(),
 467                                 Arc::new(TestPersister {
 468                                         update_ret: Mutex::new(ChannelMonitorUpdateStatus::Completed)
 469                                 }), Arc::clone(&keys_manager)));
 470
 471                         let mut config = UserConfig::default();
 472                         config.channel_config.forwarding_fee_proportional_millionths = 0;
 473                         config.channel_handshake_config.announced_channel = true;
 474                         if anchors {
 475                                 config.channel_handshake_config.negotiate_anchors_zero_fee_htlc_tx = true;
 476                                 config.manually_accept_inbound_channels = true;
 477                         }
 478                         let network = Network::Bitcoin;
 479                         let best_block_timestamp = genesis_block(network).header.time;
 480                         let params = ChainParameters {
 481                                 network,
 482                                 best_block: BestBlock::from_network(network),
 483                         };
 484                         (ChannelManager::new($fee_estimator.clone(), monitor.clone(), broadcast.clone(), &router, Arc::clone(&logger), keys_manager.clone(), keys_manager.clone(), keys_manager.clone(), config, params, best_block_timestamp),
 485                         monitor, keys_manager)
 486                 } }
 487         }
 488
 489         macro_rules! reload_node {
 490                 ($ser: expr, $node_id: expr, $old_monitors: expr, $keys_manager: expr, $fee_estimator: expr) => { {
 491                     let keys_manager = Arc::clone(& $keys_manager);
 492                         let logger: Arc<dyn Logger> = Arc::new(test_logger::TestLogger::new($node_id.to_string(), out.clone()));
 493                         let chain_monitor = Arc::new(TestChainMonitor::new(broadcast.clone(), logger.clone(), $fee_estimator.clone(),
 494                                 Arc::new(TestPersister {
 495                                         update_ret: Mutex::new(ChannelMonitorUpdateStatus::Completed)
 496                                 }), Arc::clone(& $keys_manager)));
 497
 498                         let mut config = UserConfig::default();
 499                         config.channel_config.forwarding_fee_proportional_millionths = 0;
 500                         config.channel_handshake_config.announced_channel = true;
 501                         if anchors {
 502                                 config.channel_handshake_config.negotiate_anchors_zero_fee_htlc_tx = true;
 503                                 config.manually_accept_inbound_channels = true;
 504                         }
 505
 506                         let mut monitors = HashMap::new();
 507                         let mut old_monitors = $old_monitors.latest_monitors.lock().unwrap();
 508                         for (outpoint, (update_id, monitor_ser)) in old_monitors.drain() {
 509                                 monitors.insert(outpoint, <(BlockHash, ChannelMonitor<TestChannelSigner>)>::read(&mut Cursor::new(&monitor_ser), (&*$keys_manager, &*$keys_manager)).expect("Failed to read monitor").1);
 510                                 chain_monitor.latest_monitors.lock().unwrap().insert(outpoint, (update_id, monitor_ser));
 511                         }
 512                         let mut monitor_refs = HashMap::new();
 513                         for (outpoint, monitor) in monitors.iter_mut() {
 514                                 monitor_refs.insert(*outpoint, monitor);
 515                         }
 516
 517                         let read_args = ChannelManagerReadArgs {
 518                                 entropy_source: keys_manager.clone(),
 519                                 node_signer: keys_manager.clone(),
 520                                 signer_provider: keys_manager.clone(),
 521                                 fee_estimator: $fee_estimator.clone(),
 522                                 chain_monitor: chain_monitor.clone(),
 523                                 tx_broadcaster: broadcast.clone(),
 524                                 router: &router,
 525                                 logger,
 526                                 default_config: config,
 527                                 channel_monitors: monitor_refs,
 528                         };
 529
 530                         let res = (<(BlockHash, ChanMan)>::read(&mut Cursor::new(&$ser.0), read_args).expect("Failed to read manager").1, chain_monitor.clone());
 531                         for (funding_txo, mon) in monitors.drain() {
 532                                 assert_eq!(chain_monitor.chain_monitor.watch_channel(funding_txo, mon),
 533                                         Ok(ChannelMonitorUpdateStatus::Completed));
 534                         }
 535                         res
 536                 } }
 537         }
 538
 539         let mut channel_txn = Vec::new();
 540         macro_rules! make_channel {
 541                 ($source: expr, $dest: expr, $dest_keys_manager: expr, $chan_id: expr) => { {
 542                         $source.peer_connected(&$dest.get_our_node_id(), &Init {
 543                                 features: $dest.init_features(), networks: None, remote_network_address: None
 544                         }, true).unwrap();
 545                         $dest.peer_connected(&$source.get_our_node_id(), &Init {
 546                                 features: $source.init_features(), networks: None, remote_network_address: None
 547                         }, false).unwrap();
 548
 549                         $source.create_channel($dest.get_our_node_id(), 100_000, 42, 0, None, None).unwrap();
 550                         let open_channel = {
 551                                 let events = $source.get_and_clear_pending_msg_events();
 552                                 assert_eq!(events.len(), 1);
 553                                 if let events::MessageSendEvent::SendOpenChannel { ref msg, .. } = events[0] {
 554                                         msg.clone()
 555                                 } else { panic!("Wrong event type"); }
 556                         };
 557
 558                         $dest.handle_open_channel(&$source.get_our_node_id(), &open_channel);
 559                         let accept_channel = {
 560                                 if anchors {
 561                                         let events = $dest.get_and_clear_pending_events();
 562                                         assert_eq!(events.len(), 1);
 563                                         if let events::Event::OpenChannelRequest {
 564                                                 ref temporary_channel_id, ref counterparty_node_id, ..
 565                                         } = events[0] {
 566                                                 let mut random_bytes = [0u8; 16];
 567                                                 random_bytes.copy_from_slice(&$dest_keys_manager.get_secure_random_bytes()[..16]);
 568                                                 let user_channel_id = u128::from_be_bytes(random_bytes);
 569                                                 $dest.accept_inbound_channel(
 570                                                         temporary_channel_id,
 571                                                         counterparty_node_id,
 572                                                         user_channel_id,
 573                                                 ).unwrap();
 574                                         } else { panic!("Wrong event type"); }
 575                                 }
 576                                 let events = $dest.get_and_clear_pending_msg_events();
 577                                 assert_eq!(events.len(), 1);
 578                                 if let events::MessageSendEvent::SendAcceptChannel { ref msg, .. } = events[0] {
 579                                         msg.clone()
 580                                 } else { panic!("Wrong event type"); }
 581                         };
 582
 583                         $source.handle_accept_channel(&$dest.get_our_node_id(), &accept_channel);
 584                         let funding_output;
 585                         {
 586                                 let events = $source.get_and_clear_pending_events();
 587                                 assert_eq!(events.len(), 1);
 588                                 if let events::Event::FundingGenerationReady { ref temporary_channel_id, ref channel_value_satoshis, ref output_script, .. } = events[0] {
 589                                         let tx = Transaction { version: $chan_id, lock_time: LockTime::ZERO, input: Vec::new(), output: vec![TxOut {
 590                                                 value: *channel_value_satoshis, script_pubkey: output_script.clone(),
 591                                         }]};
 592                                         funding_output = OutPoint { txid: tx.txid(), index: 0 };
 593                                         $source.funding_transaction_generated(&temporary_channel_id, &$dest.get_our_node_id(), tx.clone()).unwrap();
 594                                         channel_txn.push(tx);
 595                                 } else { panic!("Wrong event type"); }
 596                         }
 597
 598                         let funding_created = {
 599                                 let events = $source.get_and_clear_pending_msg_events();
 600                                 assert_eq!(events.len(), 1);
 601                                 if let events::MessageSendEvent::SendFundingCreated { ref msg, .. } = events[0] {
 602                                         msg.clone()
 603                                 } else { panic!("Wrong event type"); }
 604                         };
 605                         $dest.handle_funding_created(&$source.get_our_node_id(), &funding_created);
 606
 607                         let funding_signed = {
 608                                 let events = $dest.get_and_clear_pending_msg_events();
 609                                 assert_eq!(events.len(), 1);
 610                                 if let events::MessageSendEvent::SendFundingSigned { ref msg, .. } = events[0] {
 611                                         msg.clone()
 612                                 } else { panic!("Wrong event type"); }
 613                         };
 614                         let events = $dest.get_and_clear_pending_events();
 615                         assert_eq!(events.len(), 1);
 616                         if let events::Event::ChannelPending{ ref counterparty_node_id, .. } = events[0] {
 617                                 assert_eq!(counterparty_node_id, &$source.get_our_node_id());
 618                         } else { panic!("Wrong event type"); }
 619
 620                         $source.handle_funding_signed(&$dest.get_our_node_id(), &funding_signed);
 621                         let events = $source.get_and_clear_pending_events();
 622                         assert_eq!(events.len(), 1);
 623                         if let events::Event::ChannelPending{ ref counterparty_node_id, .. } = events[0] {
 624                                 assert_eq!(counterparty_node_id, &$dest.get_our_node_id());
 625                         } else { panic!("Wrong event type"); }
 626
 627                         funding_output
 628                 } }
 629         }
 630
 631         macro_rules! confirm_txn {
 632                 ($node: expr) => { {
 633                         let chain_hash = genesis_block(Network::Bitcoin).block_hash();
 634                         let mut header = create_dummy_header(chain_hash, 42);
 635                         let txdata: Vec<_> = channel_txn.iter().enumerate().map(|(i, tx)| (i + 1, tx)).collect();
 636                         $node.transactions_confirmed(&header, &txdata, 1);
 637                         for _ in 2..100 {
 638                                 header = create_dummy_header(header.block_hash(), 42);
 639                         }
 640                         $node.best_block_updated(&header, 99);
 641                 } }
 642         }
 643
 644         macro_rules! lock_fundings {
 645                 ($nodes: expr) => { {
 646                         let mut node_events = Vec::new();
 647                         for node in $nodes.iter() {
 648                                 node_events.push(node.get_and_clear_pending_msg_events());
 649                         }
 650                         for (idx, node_event) in node_events.iter().enumerate() {
 651                                 for event in node_event {
 652                                         if let events::MessageSendEvent::SendChannelReady { ref node_id, ref msg } = event {
 653                                                 for node in $nodes.iter() {
 654                                                         if node.get_our_node_id() == *node_id {
 655                                                                 node.handle_channel_ready(&$nodes[idx].get_our_node_id(), msg);
 656                                                         }
 657                                                 }
 658                                         } else { panic!("Wrong event type"); }
 659                                 }
 660                         }
 661
 662                         for node in $nodes.iter() {
 663                                 let events = node.get_and_clear_pending_msg_events();
 664                                 for event in events {
 665                                         if let events::MessageSendEvent::SendAnnouncementSignatures { .. } = event {
 666                                         } else { panic!("Wrong event type"); }
 667                                 }
 668                         }
 669                 } }
 670         }
 671
 672         let fee_est_a = Arc::new(FuzzEstimator { ret_val: atomic::AtomicU32::new(253) });
 673         let mut last_htlc_clear_fee_a =  253;
 674         let fee_est_b = Arc::new(FuzzEstimator { ret_val: atomic::AtomicU32::new(253) });
 675         let mut last_htlc_clear_fee_b =  253;
 676         let fee_est_c = Arc::new(FuzzEstimator { ret_val: atomic::AtomicU32::new(253) });
 677         let mut last_htlc_clear_fee_c =  253;
 678
 679         // 3 nodes is enough to hit all the possible cases, notably unknown-source-unknown-dest
 680         // forwarding.
 681         let (node_a, mut monitor_a, keys_manager_a) = make_node!(0, fee_est_a);
 682         let (node_b, mut monitor_b, keys_manager_b) = make_node!(1, fee_est_b);
 683         let (node_c, mut monitor_c, keys_manager_c) = make_node!(2, fee_est_c);
 684
 685         let mut nodes = [node_a, node_b, node_c];
 686
 687         let chan_1_funding = make_channel!(nodes[0], nodes[1], keys_manager_b, 0);
 688         let chan_2_funding = make_channel!(nodes[1], nodes[2], keys_manager_c, 1);
 689
 690         for node in nodes.iter() {
 691                 confirm_txn!(node);
 692         }
 693
 694         lock_fundings!(nodes);
 695
 696         let chan_a = nodes[0].list_usable_channels()[0].short_channel_id.unwrap();
 697         let chan_b = nodes[2].list_usable_channels()[0].short_channel_id.unwrap();
 698
 699         let mut payment_id: u8 = 0;
 700         let mut payment_idx: u64 = 0;
 701
 702         let mut chan_a_disconnected = false;
 703         let mut chan_b_disconnected = false;
 704         let mut ab_events = Vec::new();
 705         let mut ba_events = Vec::new();
 706         let mut bc_events = Vec::new();
 707         let mut cb_events = Vec::new();
 708
 709         let mut node_a_ser = VecWriter(Vec::new());
 710         nodes[0].write(&mut node_a_ser).unwrap();
 711         let mut node_b_ser = VecWriter(Vec::new());
 712         nodes[1].write(&mut node_b_ser).unwrap();
 713         let mut node_c_ser = VecWriter(Vec::new());
 714         nodes[2].write(&mut node_c_ser).unwrap();
 715
 716         macro_rules! test_return {
 717                 () => { {
 718                         assert_eq!(nodes[0].list_channels().len(), 1);
 719                         assert_eq!(nodes[1].list_channels().len(), 2);
 720                         assert_eq!(nodes[2].list_channels().len(), 1);
 721                         return;
 722                 } }
 723         }
 724
 725         let mut read_pos = 0;
 726         macro_rules! get_slice {
 727                 ($len: expr) => {
 728                         {
 729                                 let slice_len = $len as usize;
 730                                 if data.len() < read_pos + slice_len {
 731                                         test_return!();
 732                                 }
 733                                 read_pos += slice_len;
 734                                 &data[read_pos - slice_len..read_pos]
 735                         }
 736                 }
 737         }
 738
 739         loop {
 740                 // Push any events from Node B onto ba_events and bc_events
 741                 macro_rules! push_excess_b_events {
 742                         ($excess_events: expr, $expect_drop_node: expr) => { {
 743                                 let a_id = nodes[0].get_our_node_id();
 744                                 let expect_drop_node: Option<usize> = $expect_drop_node;
 745                                 let expect_drop_id = if let Some(id) = expect_drop_node { Some(nodes[id].get_our_node_id()) } else { None };
 746                                 for event in $excess_events {
 747                                         let push_a = match event {
 748                                                 events::MessageSendEvent::UpdateHTLCs { ref node_id, .. } => {
 749                                                         if Some(*node_id) == expect_drop_id { panic!("peer_disconnected should drop msgs bound for the disconnected peer"); }
 750                                                         *node_id == a_id
 751                                                 },
 752                                                 events::MessageSendEvent::SendRevokeAndACK { ref node_id, .. } => {
 753                                                         if Some(*node_id) == expect_drop_id { panic!("peer_disconnected should drop msgs bound for the disconnected peer"); }
 754                                                         *node_id == a_id
 755                                                 },
 756                                                 events::MessageSendEvent::SendChannelReestablish { ref node_id, .. } => {
 757                                                         if Some(*node_id) == expect_drop_id { panic!("peer_disconnected should drop msgs bound for the disconnected peer"); }
 758                                                         *node_id == a_id
 759                                                 },
 760                                                 events::MessageSendEvent::SendChannelReady { .. } => continue,
 761                                                 events::MessageSendEvent::SendAnnouncementSignatures { .. } => continue,
 762                                                 events::MessageSendEvent::SendChannelUpdate { ref node_id, ref msg } => {
 763                                                         assert_eq!(msg.contents.flags & 2, 0); // The disable bit must never be set!
 764                                                         if Some(*node_id) == expect_drop_id { panic!("peer_disconnected should drop msgs bound for the disconnected peer"); }
 765                                                         *node_id == a_id
 766                                                 },
 767                                                 _ => panic!("Unhandled message event {:?}", event),
 768                                         };
 769                                         if push_a { ba_events.push(event); } else { bc_events.push(event); }
 770                                 }
 771                         } }
 772                 }
 773
 774                 // While delivering messages, we select across three possible message selection processes
 775                 // to ensure we get as much coverage as possible. See the individual enum variants for more
 776                 // details.
 777                 #[derive(PartialEq)]
 778                 enum ProcessMessages {
 779                         /// Deliver all available messages, including fetching any new messages from
 780                         /// `get_and_clear_pending_msg_events()` (which may have side effects).
 781                         AllMessages,
 782                         /// Call `get_and_clear_pending_msg_events()` first, and then deliver up to one
 783                         /// message (which may already be queued).
 784                         OneMessage,
 785                         /// Deliver up to one already-queued message. This avoids any potential side-effects
 786                         /// of `get_and_clear_pending_msg_events()` (eg freeing the HTLC holding cell), which
 787                         /// provides potentially more coverage.
 788                         OnePendingMessage,
 789                 }
 790
 791                 macro_rules! process_msg_events {
 792                         ($node: expr, $corrupt_forward: expr, $limit_events: expr) => { {
 793                                 let mut events = if $node == 1 {
 794                                         let mut new_events = Vec::new();
 795                                         mem::swap(&mut new_events, &mut ba_events);
 796                                         new_events.extend_from_slice(&bc_events[..]);
 797                                         bc_events.clear();
 798                                         new_events
 799                                 } else if $node == 0 {
 800                                         let mut new_events = Vec::new();
 801                                         mem::swap(&mut new_events, &mut ab_events);
 802                                         new_events
 803                                 } else {
 804                                         let mut new_events = Vec::new();
 805                                         mem::swap(&mut new_events, &mut cb_events);
 806                                         new_events
 807                                 };
 808                                 let mut new_events = Vec::new();
 809                                 if $limit_events != ProcessMessages::OnePendingMessage {
 810                                         new_events = nodes[$node].get_and_clear_pending_msg_events();
 811                                 }
 812                                 let mut had_events = false;
 813                                 let mut events_iter = events.drain(..).chain(new_events.drain(..));
 814                                 let mut extra_ev = None;
 815                                 for event in &mut events_iter {
 816                                         had_events = true;
 817                                         match event {
 818                                                 events::MessageSendEvent::UpdateHTLCs { node_id, updates: CommitmentUpdate { update_add_htlcs, update_fail_htlcs, update_fulfill_htlcs, update_fail_malformed_htlcs, update_fee, commitment_signed } } => {
 819                                                         for (idx, dest) in nodes.iter().enumerate() {
 820                                                                 if dest.get_our_node_id() == node_id {
 821                                                                         for update_add in update_add_htlcs.iter() {
 822                                                                                 out.locked_write(format!("Delivering update_add_htlc to node {}.\n", idx).as_bytes());
 823                                                                                 if !$corrupt_forward {
 824                                                                                         dest.handle_update_add_htlc(&nodes[$node].get_our_node_id(), update_add);
 825                                                                                 } else {
 826                                                                                         // Corrupt the update_add_htlc message so that its HMAC
 827                                                                                         // check will fail and we generate a
 828                                                                                         // update_fail_malformed_htlc instead of an
 829                                                                                         // update_fail_htlc as we do when we reject a payment.
 830                                                                                         let mut msg_ser = update_add.encode();
 831                                                                                         msg_ser[1000] ^= 0xff;
 832                                                                                         let new_msg = UpdateAddHTLC::read(&mut Cursor::new(&msg_ser)).unwrap();
 833                                                                                         dest.handle_update_add_htlc(&nodes[$node].get_our_node_id(), &new_msg);
 834                                                                                 }
 835                                                                         }
 836                                                                         for update_fulfill in update_fulfill_htlcs.iter() {
 837                                                                                 out.locked_write(format!("Delivering update_fulfill_htlc to node {}.\n", idx).as_bytes());
 838                                                                                 dest.handle_update_fulfill_htlc(&nodes[$node].get_our_node_id(), update_fulfill);
 839                                                                         }
 840                                                                         for update_fail in update_fail_htlcs.iter() {
 841                                                                                 out.locked_write(format!("Delivering update_fail_htlc to node {}.\n", idx).as_bytes());
 842                                                                                 dest.handle_update_fail_htlc(&nodes[$node].get_our_node_id(), update_fail);
 843                                                                         }
 844                                                                         for update_fail_malformed in update_fail_malformed_htlcs.iter() {
 845                                                                                 out.locked_write(format!("Delivering update_fail_malformed_htlc to node {}.\n", idx).as_bytes());
 846                                                                                 dest.handle_update_fail_malformed_htlc(&nodes[$node].get_our_node_id(), update_fail_malformed);
 847                                                                         }
 848                                                                         if let Some(msg) = update_fee {
 849                                                                                 out.locked_write(format!("Delivering update_fee to node {}.\n", idx).as_bytes());
 850                                                                                 dest.handle_update_fee(&nodes[$node].get_our_node_id(), &msg);
 851                                                                         }
 852                                                                         let processed_change = !update_add_htlcs.is_empty() || !update_fulfill_htlcs.is_empty() ||
 853                                                                                 !update_fail_htlcs.is_empty() || !update_fail_malformed_htlcs.is_empty();
 854                                                                         if $limit_events != ProcessMessages::AllMessages && processed_change {
 855                                                                                 // If we only want to process some messages, don't deliver the CS until later.
 856                                                                                 extra_ev = Some(events::MessageSendEvent::UpdateHTLCs { node_id, updates: CommitmentUpdate {
 857                                                                                         update_add_htlcs: Vec::new(),
 858                                                                                         update_fail_htlcs: Vec::new(),
 859                                                                                         update_fulfill_htlcs: Vec::new(),
 860                                                                                         update_fail_malformed_htlcs: Vec::new(),
 861                                                                                         update_fee: None,
 862                                                                                         commitment_signed
 863                                                                                 } });
 864                                                                                 break;
 865                                                                         }
 866                                                                         out.locked_write(format!("Delivering commitment_signed to node {}.\n", idx).as_bytes());
 867                                                                         dest.handle_commitment_signed(&nodes[$node].get_our_node_id(), &commitment_signed);
 868                                                                         break;
 869                                                                 }
 870                                                         }
 871                                                 },
 872                                                 events::MessageSendEvent::SendRevokeAndACK { ref node_id, ref msg } => {
 873                                                         for (idx, dest) in nodes.iter().enumerate() {
 874                                                                 if dest.get_our_node_id() == *node_id {
 875                                                                         out.locked_write(format!("Delivering revoke_and_ack to node {}.\n", idx).as_bytes());
 876                                                                         dest.handle_revoke_and_ack(&nodes[$node].get_our_node_id(), msg);
 877                                                                 }
 878                                                         }
 879                                                 },
 880                                                 events::MessageSendEvent::SendChannelReestablish { ref node_id, ref msg } => {
 881                                                         for (idx, dest) in nodes.iter().enumerate() {
 882                                                                 if dest.get_our_node_id() == *node_id {
 883                                                                         out.locked_write(format!("Delivering channel_reestablish to node {}.\n", idx).as_bytes());
 884                                                                         dest.handle_channel_reestablish(&nodes[$node].get_our_node_id(), msg);
 885                                                                 }
 886                                                         }
 887                                                 },
 888                                                 events::MessageSendEvent::SendChannelReady { .. } => {
 889                                                         // Can be generated as a reestablish response
 890                                                 },
 891                                                 events::MessageSendEvent::SendAnnouncementSignatures { .. } => {
 892                                                         // Can be generated as a reestablish response
 893                                                 },
 894                                                 events::MessageSendEvent::SendChannelUpdate { ref msg, .. } => {
 895                                                         // When we reconnect we will resend a channel_update to make sure our
 896                                                         // counterparty has the latest parameters for receiving payments
 897                                                         // through us. We do, however, check that the message does not include
 898                                                         // the "disabled" bit, as we should never ever have a channel which is
 899                                                         // disabled when we send such an update (or it may indicate channel
 900                                                         // force-close which we should detect as an error).
 901                                                         assert_eq!(msg.contents.flags & 2, 0);
 902                                                 },
 903                                                 _ => if out.may_fail.load(atomic::Ordering::Acquire) {
 904                                                         return;
 905                                                 } else {
 906                                                         panic!("Unhandled message event {:?}", event)
 907                                                 },
 908                                         }
 909                                         if $limit_events != ProcessMessages::AllMessages {
 910                                                 break;
 911                                         }
 912                                 }
 913                                 if $node == 1 {
 914                                         push_excess_b_events!(extra_ev.into_iter().chain(events_iter), None);
 915                                 } else if $node == 0 {
 916                                         if let Some(ev) = extra_ev { ab_events.push(ev); }
 917                                         for event in events_iter { ab_events.push(event); }
 918                                 } else {
 919                                         if let Some(ev) = extra_ev { cb_events.push(ev); }
 920                                         for event in events_iter { cb_events.push(event); }
 921                                 }
 922                                 had_events
 923                         } }
 924                 }
 925
 926                 macro_rules! drain_msg_events_on_disconnect {
 927                         ($counterparty_id: expr) => { {
 928                                 if $counterparty_id == 0 {
 929                                         for event in nodes[0].get_and_clear_pending_msg_events() {
 930                                                 match event {
 931                                                         events::MessageSendEvent::UpdateHTLCs { .. } => {},
 932                                                         events::MessageSendEvent::SendRevokeAndACK { .. } => {},
 933                                                         events::MessageSendEvent::SendChannelReestablish { .. } => {},
 934                                                         events::MessageSendEvent::SendChannelReady { .. } => {},
 935                                                         events::MessageSendEvent::SendAnnouncementSignatures { .. } => {},
 936                                                         events::MessageSendEvent::SendChannelUpdate { ref msg, .. } => {
 937                                                                 assert_eq!(msg.contents.flags & 2, 0); // The disable bit must never be set!
 938                                                         },
 939                                                         _ => if out.may_fail.load(atomic::Ordering::Acquire) {
 940                                                                 return;
 941                                                         } else {
 942                                                                 panic!("Unhandled message event")
 943                                                         },
 944                                                 }
 945                                         }
 946                                         push_excess_b_events!(nodes[1].get_and_clear_pending_msg_events().drain(..), Some(0));
 947                                         ab_events.clear();
 948                                         ba_events.clear();
 949                                 } else {
 950                                         for event in nodes[2].get_and_clear_pending_msg_events() {
 951                                                 match event {
 952                                                         events::MessageSendEvent::UpdateHTLCs { .. } => {},
 953                                                         events::MessageSendEvent::SendRevokeAndACK { .. } => {},
 954                                                         events::MessageSendEvent::SendChannelReestablish { .. } => {},
 955                                                         events::MessageSendEvent::SendChannelReady { .. } => {},
 956                                                         events::MessageSendEvent::SendAnnouncementSignatures { .. } => {},
 957                                                         events::MessageSendEvent::SendChannelUpdate { ref msg, .. } => {
 958                                                                 assert_eq!(msg.contents.flags & 2, 0); // The disable bit must never be set!
 959                                                         },
 960                                                         _ => if out.may_fail.load(atomic::Ordering::Acquire) {
 961                                                                 return;
 962                                                         } else {
 963                                                                 panic!("Unhandled message event")
 964                                                         },
 965                                                 }
 966                                         }
 967                                         push_excess_b_events!(nodes[1].get_and_clear_pending_msg_events().drain(..), Some(2));
 968                                         bc_events.clear();
 969                                         cb_events.clear();
 970                                 }
 971                         } }
 972                 }
 973
 974                 macro_rules! process_events {
 975                         ($node: expr, $fail: expr) => { {
 976                                 // In case we get 256 payments we may have a hash collision, resulting in the
 977                                 // second claim/fail call not finding the duplicate-hash HTLC, so we have to
 978                                 // deduplicate the calls here.
 979                                 let mut claim_set = HashSet::new();
 980                                 let mut events = nodes[$node].get_and_clear_pending_events();
 981                                 // Sort events so that PendingHTLCsForwardable get processed last. This avoids a
 982                                 // case where we first process a PendingHTLCsForwardable, then claim/fail on a
 983                                 // PaymentClaimable, claiming/failing two HTLCs, but leaving a just-generated
 984                                 // PaymentClaimable event for the second HTLC in our pending_events (and breaking
 985                                 // our claim_set deduplication).
 986                                 events.sort_by(|a, b| {
 987                                         if let events::Event::PaymentClaimable { .. } = a {
 988                                                 if let events::Event::PendingHTLCsForwardable { .. } = b {
 989                                                         Ordering::Less
 990                                                 } else { Ordering::Equal }
 991                                         } else if let events::Event::PendingHTLCsForwardable { .. } = a {
 992                                                 if let events::Event::PaymentClaimable { .. } = b {
 993                                                         Ordering::Greater
 994                                                 } else { Ordering::Equal }
 995                                         } else { Ordering::Equal }
 996                                 });
 997                                 let had_events = !events.is_empty();
 998                                 for event in events.drain(..) {
 999                                         match event {
1000                                                 events::Event::PaymentClaimable { payment_hash, .. } => {
1001                                                         if claim_set.insert(payment_hash.0) {
1002                                                                 if $fail {
1003                                                                         nodes[$node].fail_htlc_backwards(&payment_hash);
1004                                                                 } else {
1005                                                                         nodes[$node].claim_funds(PaymentPreimage(payment_hash.0));
1006                                                                 }
1007                                                         }
1008                                                 },
1009                                                 events::Event::PaymentSent { .. } => {},
1010                                                 events::Event::PaymentClaimed { .. } => {},
1011                                                 events::Event::PaymentPathSuccessful { .. } => {},
1012                                                 events::Event::PaymentPathFailed { .. } => {},
1013                                                 events::Event::PaymentFailed { .. } => {},
1014                                                 events::Event::ProbeSuccessful { .. } | events::Event::ProbeFailed { .. } => {
1015                                                         // Even though we don't explicitly send probes, because probes are
1016                                                         // detected based on hashing the payment hash+preimage, its rather
1017                                                         // trivial for the fuzzer to build payments that accidentally end up
1018                                                         // looking like probes.
1019                                                 },
1020                                                 events::Event::PaymentForwarded { .. } if $node == 1 => {},
1021                                                 events::Event::ChannelReady { .. } => {},
1022                                                 events::Event::PendingHTLCsForwardable { .. } => {
1023                                                         nodes[$node].process_pending_htlc_forwards();
1024                                                 },
1025                                                 events::Event::HTLCHandlingFailed { .. } => {},
1026                                                 _ => if out.may_fail.load(atomic::Ordering::Acquire) {
1027                                                         return;
1028                                                 } else {
1029                                                         panic!("Unhandled event")
1030                                                 },
1031                                         }
1032                                 }
1033                                 had_events
1034                         } }
1035                 }
1036
1037                 let v = get_slice!(1)[0];
1038                 out.locked_write(format!("READ A BYTE! HANDLING INPUT {:x}...........\n", v).as_bytes());
1039                 match v {
1040                         // In general, we keep related message groups close together in binary form, allowing
1041                         // bit-twiddling mutations to have similar effects. This is probably overkill, but no
1042                         // harm in doing so.
1043
1044                         0x00 => *monitor_a.persister.update_ret.lock().unwrap() = ChannelMonitorUpdateStatus::InProgress,
1045                         0x01 => *monitor_b.persister.update_ret.lock().unwrap() = ChannelMonitorUpdateStatus::InProgress,
1046                         0x02 => *monitor_c.persister.update_ret.lock().unwrap() = ChannelMonitorUpdateStatus::InProgress,
1047                         0x04 => *monitor_a.persister.update_ret.lock().unwrap() = ChannelMonitorUpdateStatus::Completed,
1048                         0x05 => *monitor_b.persister.update_ret.lock().unwrap() = ChannelMonitorUpdateStatus::Completed,
1049                         0x06 => *monitor_c.persister.update_ret.lock().unwrap() = ChannelMonitorUpdateStatus::Completed,
1050
1051                         0x08 => {
1052                                 if let Some((id, _)) = monitor_a.latest_monitors.lock().unwrap().get(&chan_1_funding) {
1053                                         monitor_a.chain_monitor.force_channel_monitor_updated(chan_1_funding, *id);
1054                                         nodes[0].process_monitor_events();
1055                                 }
1056                         },
1057                         0x09 => {
1058                                 if let Some((id, _)) = monitor_b.latest_monitors.lock().unwrap().get(&chan_1_funding) {
1059                                         monitor_b.chain_monitor.force_channel_monitor_updated(chan_1_funding, *id);
1060                                         nodes[1].process_monitor_events();
1061                                 }
1062                         },
1063                         0x0a => {
1064                                 if let Some((id, _)) = monitor_b.latest_monitors.lock().unwrap().get(&chan_2_funding) {
1065                                         monitor_b.chain_monitor.force_channel_monitor_updated(chan_2_funding, *id);
1066                                         nodes[1].process_monitor_events();
1067                                 }
1068                         },
1069                         0x0b => {
1070                                 if let Some((id, _)) = monitor_c.latest_monitors.lock().unwrap().get(&chan_2_funding) {
1071                                         monitor_c.chain_monitor.force_channel_monitor_updated(chan_2_funding, *id);
1072                                         nodes[2].process_monitor_events();
1073                                 }
1074                         },
1075
1076                         0x0c => {
1077                                 if !chan_a_disconnected {
1078                                         nodes[0].peer_disconnected(&nodes[1].get_our_node_id());
1079                                         nodes[1].peer_disconnected(&nodes[0].get_our_node_id());
1080                                         chan_a_disconnected = true;
1081                                         drain_msg_events_on_disconnect!(0);
1082                                 }
1083                         },
1084                         0x0d => {
1085                                 if !chan_b_disconnected {
1086                                         nodes[1].peer_disconnected(&nodes[2].get_our_node_id());
1087                                         nodes[2].peer_disconnected(&nodes[1].get_our_node_id());
1088                                         chan_b_disconnected = true;
1089                                         drain_msg_events_on_disconnect!(2);
1090                                 }
1091                         },
1092                         0x0e => {
1093                                 if chan_a_disconnected {
1094                                         nodes[0].peer_connected(&nodes[1].get_our_node_id(), &Init {
1095                                                 features: nodes[1].init_features(), networks: None, remote_network_address: None
1096                                         }, true).unwrap();
1097                                         nodes[1].peer_connected(&nodes[0].get_our_node_id(), &Init {
1098                                                 features: nodes[0].init_features(), networks: None, remote_network_address: None
1099                                         }, false).unwrap();
1100                                         chan_a_disconnected = false;
1101                                 }
1102                         },
1103                         0x0f => {
1104                                 if chan_b_disconnected {
1105                                         nodes[1].peer_connected(&nodes[2].get_our_node_id(), &Init {
1106                                                 features: nodes[2].init_features(), networks: None, remote_network_address: None
1107                                         }, true).unwrap();
1108                                         nodes[2].peer_connected(&nodes[1].get_our_node_id(), &Init {
1109                                                 features: nodes[1].init_features(), networks: None, remote_network_address: None
1110                                         }, false).unwrap();
1111                                         chan_b_disconnected = false;
1112                                 }
1113                         },
1114
1115                         0x10 => { process_msg_events!(0, true, ProcessMessages::AllMessages); },
1116                         0x11 => { process_msg_events!(0, false, ProcessMessages::AllMessages); },
1117                         0x12 => { process_msg_events!(0, true, ProcessMessages::OneMessage); },
1118                         0x13 => { process_msg_events!(0, false, ProcessMessages::OneMessage); },
1119                         0x14 => { process_msg_events!(0, true, ProcessMessages::OnePendingMessage); },
1120                         0x15 => { process_msg_events!(0, false, ProcessMessages::OnePendingMessage); },
1121
1122                         0x16 => { process_events!(0, true); },
1123                         0x17 => { process_events!(0, false); },
1124
1125                         0x18 => { process_msg_events!(1, true, ProcessMessages::AllMessages); },
1126                         0x19 => { process_msg_events!(1, false, ProcessMessages::AllMessages); },
1127                         0x1a => { process_msg_events!(1, true, ProcessMessages::OneMessage); },
1128                         0x1b => { process_msg_events!(1, false, ProcessMessages::OneMessage); },
1129                         0x1c => { process_msg_events!(1, true, ProcessMessages::OnePendingMessage); },
1130                         0x1d => { process_msg_events!(1, false, ProcessMessages::OnePendingMessage); },
1131
1132                         0x1e => { process_events!(1, true); },
1133                         0x1f => { process_events!(1, false); },
1134
1135                         0x20 => { process_msg_events!(2, true, ProcessMessages::AllMessages); },
1136                         0x21 => { process_msg_events!(2, false, ProcessMessages::AllMessages); },
1137                         0x22 => { process_msg_events!(2, true, ProcessMessages::OneMessage); },
1138                         0x23 => { process_msg_events!(2, false, ProcessMessages::OneMessage); },
1139                         0x24 => { process_msg_events!(2, true, ProcessMessages::OnePendingMessage); },
1140                         0x25 => { process_msg_events!(2, false, ProcessMessages::OnePendingMessage); },
1141
1142                         0x26 => { process_events!(2, true); },
1143                         0x27 => { process_events!(2, false); },
1144
1145                         0x2c => {
1146                                 if !chan_a_disconnected {
1147                                         nodes[1].peer_disconnected(&nodes[0].get_our_node_id());
1148                                         chan_a_disconnected = true;
1149                                         push_excess_b_events!(nodes[1].get_and_clear_pending_msg_events().drain(..), Some(0));
1150                                         ab_events.clear();
1151                                         ba_events.clear();
1152                                 }
1153                                 let (new_node_a, new_monitor_a) = reload_node!(node_a_ser, 0, monitor_a, keys_manager_a, fee_est_a);
1154                                 nodes[0] = new_node_a;
1155                                 monitor_a = new_monitor_a;
1156                         },
1157                         0x2d => {
1158                                 if !chan_a_disconnected {
1159                                         nodes[0].peer_disconnected(&nodes[1].get_our_node_id());
1160                                         chan_a_disconnected = true;
1161                                         nodes[0].get_and_clear_pending_msg_events();
1162                                         ab_events.clear();
1163                                         ba_events.clear();
1164                                 }
1165                                 if !chan_b_disconnected {
1166                                         nodes[2].peer_disconnected(&nodes[1].get_our_node_id());
1167                                         chan_b_disconnected = true;
1168                                         nodes[2].get_and_clear_pending_msg_events();
1169                                         bc_events.clear();
1170                                         cb_events.clear();
1171                                 }
1172                                 let (new_node_b, new_monitor_b) = reload_node!(node_b_ser, 1, monitor_b, keys_manager_b, fee_est_b);
1173                                 nodes[1] = new_node_b;
1174                                 monitor_b = new_monitor_b;
1175                         },
1176                         0x2e => {
1177                                 if !chan_b_disconnected {
1178                                         nodes[1].peer_disconnected(&nodes[2].get_our_node_id());
1179                                         chan_b_disconnected = true;
1180                                         push_excess_b_events!(nodes[1].get_and_clear_pending_msg_events().drain(..), Some(2));
1181                                         bc_events.clear();
1182                                         cb_events.clear();
1183                                 }
1184                                 let (new_node_c, new_monitor_c) = reload_node!(node_c_ser, 2, monitor_c, keys_manager_c, fee_est_c);
1185                                 nodes[2] = new_node_c;
1186                                 monitor_c = new_monitor_c;
1187                         },
1188
1189                         // 1/10th the channel size:
1190                         0x30 => { send_payment(&nodes[0], &nodes[1], chan_a, 10_000_000, &mut payment_id, &mut payment_idx); },
1191                         0x31 => { send_payment(&nodes[1], &nodes[0], chan_a, 10_000_000, &mut payment_id, &mut payment_idx); },
1192                         0x32 => { send_payment(&nodes[1], &nodes[2], chan_b, 10_000_000, &mut payment_id, &mut payment_idx); },
1193                         0x33 => { send_payment(&nodes[2], &nodes[1], chan_b, 10_000_000, &mut payment_id, &mut payment_idx); },
1194                         0x34 => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 10_000_000, &mut payment_id, &mut payment_idx); },
1195                         0x35 => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 10_000_000, &mut payment_id, &mut payment_idx); },
1196
1197                         0x38 => { send_payment(&nodes[0], &nodes[1], chan_a, 1_000_000, &mut payment_id, &mut payment_idx); },
1198                         0x39 => { send_payment(&nodes[1], &nodes[0], chan_a, 1_000_000, &mut payment_id, &mut payment_idx); },
1199                         0x3a => { send_payment(&nodes[1], &nodes[2], chan_b, 1_000_000, &mut payment_id, &mut payment_idx); },
1200                         0x3b => { send_payment(&nodes[2], &nodes[1], chan_b, 1_000_000, &mut payment_id, &mut payment_idx); },
1201                         0x3c => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 1_000_000, &mut payment_id, &mut payment_idx); },
1202                         0x3d => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 1_000_000, &mut payment_id, &mut payment_idx); },
1203
1204                         0x40 => { send_payment(&nodes[0], &nodes[1], chan_a, 100_000, &mut payment_id, &mut payment_idx); },
1205                         0x41 => { send_payment(&nodes[1], &nodes[0], chan_a, 100_000, &mut payment_id, &mut payment_idx); },
1206                         0x42 => { send_payment(&nodes[1], &nodes[2], chan_b, 100_000, &mut payment_id, &mut payment_idx); },
1207                         0x43 => { send_payment(&nodes[2], &nodes[1], chan_b, 100_000, &mut payment_id, &mut payment_idx); },
1208                         0x44 => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 100_000, &mut payment_id, &mut payment_idx); },
1209                         0x45 => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 100_000, &mut payment_id, &mut payment_idx); },
1210
1211                         0x48 => { send_payment(&nodes[0], &nodes[1], chan_a, 10_000, &mut payment_id, &mut payment_idx); },
1212                         0x49 => { send_payment(&nodes[1], &nodes[0], chan_a, 10_000, &mut payment_id, &mut payment_idx); },
1213                         0x4a => { send_payment(&nodes[1], &nodes[2], chan_b, 10_000, &mut payment_id, &mut payment_idx); },
1214                         0x4b => { send_payment(&nodes[2], &nodes[1], chan_b, 10_000, &mut payment_id, &mut payment_idx); },
1215                         0x4c => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 10_000, &mut payment_id, &mut payment_idx); },
1216                         0x4d => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 10_000, &mut payment_id, &mut payment_idx); },
1217
1218                         0x50 => { send_payment(&nodes[0], &nodes[1], chan_a, 1_000, &mut payment_id, &mut payment_idx); },
1219                         0x51 => { send_payment(&nodes[1], &nodes[0], chan_a, 1_000, &mut payment_id, &mut payment_idx); },
1220                         0x52 => { send_payment(&nodes[1], &nodes[2], chan_b, 1_000, &mut payment_id, &mut payment_idx); },
1221                         0x53 => { send_payment(&nodes[2], &nodes[1], chan_b, 1_000, &mut payment_id, &mut payment_idx); },
1222                         0x54 => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 1_000, &mut payment_id, &mut payment_idx); },
1223                         0x55 => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 1_000, &mut payment_id, &mut payment_idx); },
1224
1225                         0x58 => { send_payment(&nodes[0], &nodes[1], chan_a, 100, &mut payment_id, &mut payment_idx); },
1226                         0x59 => { send_payment(&nodes[1], &nodes[0], chan_a, 100, &mut payment_id, &mut payment_idx); },
1227                         0x5a => { send_payment(&nodes[1], &nodes[2], chan_b, 100, &mut payment_id, &mut payment_idx); },
1228                         0x5b => { send_payment(&nodes[2], &nodes[1], chan_b, 100, &mut payment_id, &mut payment_idx); },
1229                         0x5c => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 100, &mut payment_id, &mut payment_idx); },
1230                         0x5d => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 100, &mut payment_id, &mut payment_idx); },
1231
1232                         0x60 => { send_payment(&nodes[0], &nodes[1], chan_a, 10, &mut payment_id, &mut payment_idx); },
1233                         0x61 => { send_payment(&nodes[1], &nodes[0], chan_a, 10, &mut payment_id, &mut payment_idx); },
1234                         0x62 => { send_payment(&nodes[1], &nodes[2], chan_b, 10, &mut payment_id, &mut payment_idx); },
1235                         0x63 => { send_payment(&nodes[2], &nodes[1], chan_b, 10, &mut payment_id, &mut payment_idx); },
1236                         0x64 => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 10, &mut payment_id, &mut payment_idx); },
1237                         0x65 => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 10, &mut payment_id, &mut payment_idx); },
1238
1239                         0x68 => { send_payment(&nodes[0], &nodes[1], chan_a, 1, &mut payment_id, &mut payment_idx); },
1240                         0x69 => { send_payment(&nodes[1], &nodes[0], chan_a, 1, &mut payment_id, &mut payment_idx); },
1241                         0x6a => { send_payment(&nodes[1], &nodes[2], chan_b, 1, &mut payment_id, &mut payment_idx); },
1242                         0x6b => { send_payment(&nodes[2], &nodes[1], chan_b, 1, &mut payment_id, &mut payment_idx); },
1243                         0x6c => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 1, &mut payment_id, &mut payment_idx); },
1244                         0x6d => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 1, &mut payment_id, &mut payment_idx); },
1245
1246                         0x80 => {
1247                                 let mut max_feerate = last_htlc_clear_fee_a;
1248                                 if !anchors {
1249                                         max_feerate *= FEE_SPIKE_BUFFER_FEE_INCREASE_MULTIPLE as u32;
1250                                 }
1251                                 if fee_est_a.ret_val.fetch_add(250, atomic::Ordering::AcqRel) + 250 > max_feerate {
1252                                         fee_est_a.ret_val.store(max_feerate, atomic::Ordering::Release);
1253                                 }
1254                                 nodes[0].maybe_update_chan_fees();
1255                         },
1256                         0x81 => { fee_est_a.ret_val.store(253, atomic::Ordering::Release); nodes[0].maybe_update_chan_fees(); },
1257
1258                         0x84 => {
1259                                 let mut max_feerate = last_htlc_clear_fee_b;
1260                                 if !anchors {
1261                                         max_feerate *= FEE_SPIKE_BUFFER_FEE_INCREASE_MULTIPLE as u32;
1262                                 }
1263                                 if fee_est_b.ret_val.fetch_add(250, atomic::Ordering::AcqRel) + 250 > max_feerate {
1264                                         fee_est_b.ret_val.store(max_feerate, atomic::Ordering::Release);
1265                                 }
1266                                 nodes[1].maybe_update_chan_fees();
1267                         },
1268                         0x85 => { fee_est_b.ret_val.store(253, atomic::Ordering::Release); nodes[1].maybe_update_chan_fees(); },
1269
1270                         0x88 => {
1271                                 let mut max_feerate = last_htlc_clear_fee_c;
1272                                 if !anchors {
1273                                         max_feerate *= FEE_SPIKE_BUFFER_FEE_INCREASE_MULTIPLE as u32;
1274                                 }
1275                                 if fee_est_c.ret_val.fetch_add(250, atomic::Ordering::AcqRel) + 250 > max_feerate {
1276                                         fee_est_c.ret_val.store(max_feerate, atomic::Ordering::Release);
1277                                 }
1278                                 nodes[2].maybe_update_chan_fees();
1279                         },
1280                         0x89 => { fee_est_c.ret_val.store(253, atomic::Ordering::Release); nodes[2].maybe_update_chan_fees(); },
1281
1282                         0xff => {
1283                                 // Test that no channel is in a stuck state where neither party can send funds even
1284                                 // after we resolve all pending events.
1285                                 // First make sure there are no pending monitor updates, resetting the error state
1286                                 // and calling force_channel_monitor_updated for each monitor.
1287                                 *monitor_a.persister.update_ret.lock().unwrap() = ChannelMonitorUpdateStatus::Completed;
1288                                 *monitor_b.persister.update_ret.lock().unwrap() = ChannelMonitorUpdateStatus::Completed;
1289                                 *monitor_c.persister.update_ret.lock().unwrap() = ChannelMonitorUpdateStatus::Completed;
1290
1291                                 if let Some((id, _)) = monitor_a.latest_monitors.lock().unwrap().get(&chan_1_funding) {
1292                                         monitor_a.chain_monitor.force_channel_monitor_updated(chan_1_funding, *id);
1293                                         nodes[0].process_monitor_events();
1294                                 }
1295                                 if let Some((id, _)) = monitor_b.latest_monitors.lock().unwrap().get(&chan_1_funding) {
1296                                         monitor_b.chain_monitor.force_channel_monitor_updated(chan_1_funding, *id);
1297                                         nodes[1].process_monitor_events();
1298                                 }
1299                                 if let Some((id, _)) = monitor_b.latest_monitors.lock().unwrap().get(&chan_2_funding) {
1300                                         monitor_b.chain_monitor.force_channel_monitor_updated(chan_2_funding, *id);
1301                                         nodes[1].process_monitor_events();
1302                                 }
1303                                 if let Some((id, _)) = monitor_c.latest_monitors.lock().unwrap().get(&chan_2_funding) {
1304                                         monitor_c.chain_monitor.force_channel_monitor_updated(chan_2_funding, *id);
1305                                         nodes[2].process_monitor_events();
1306                                 }
1307
1308                                 // Next, make sure peers are all connected to each other
1309                                 if chan_a_disconnected {
1310                                         nodes[0].peer_connected(&nodes[1].get_our_node_id(), &Init {
1311                                                 features: nodes[1].init_features(), networks: None, remote_network_address: None
1312                                         }, true).unwrap();
1313                                         nodes[1].peer_connected(&nodes[0].get_our_node_id(), &Init {
1314                                                 features: nodes[0].init_features(), networks: None, remote_network_address: None
1315                                         }, false).unwrap();
1316                                         chan_a_disconnected = false;
1317                                 }
1318                                 if chan_b_disconnected {
1319                                         nodes[1].peer_connected(&nodes[2].get_our_node_id(), &Init {
1320                                                 features: nodes[2].init_features(), networks: None, remote_network_address: None
1321                                         }, true).unwrap();
1322                                         nodes[2].peer_connected(&nodes[1].get_our_node_id(), &Init {
1323                                                 features: nodes[1].init_features(), networks: None, remote_network_address: None
1324                                         }, false).unwrap();
1325                                         chan_b_disconnected = false;
1326                                 }
1327
1328                                 for i in 0..std::usize::MAX {
1329                                         if i == 100 { panic!("It may take may iterations to settle the state, but it should not take forever"); }
1330                                         // Then, make sure any current forwards make their way to their destination
1331                                         if process_msg_events!(0, false, ProcessMessages::AllMessages) { continue; }
1332                                         if process_msg_events!(1, false, ProcessMessages::AllMessages) { continue; }
1333                                         if process_msg_events!(2, false, ProcessMessages::AllMessages) { continue; }
1334                                         // ...making sure any pending PendingHTLCsForwardable events are handled and
1335                                         // payments claimed.
1336                                         if process_events!(0, false) { continue; }
1337                                         if process_events!(1, false) { continue; }
1338                                         if process_events!(2, false) { continue; }
1339                                         break;
1340                                 }
1341
1342                                 // Finally, make sure that at least one end of each channel can make a substantial payment
1343                                 assert!(
1344                                         send_payment(&nodes[0], &nodes[1], chan_a, 10_000_000, &mut payment_id, &mut payment_idx) ||
1345                                         send_payment(&nodes[1], &nodes[0], chan_a, 10_000_000, &mut payment_id, &mut payment_idx));
1346                                 assert!(
1347                                         send_payment(&nodes[1], &nodes[2], chan_b, 10_000_000, &mut payment_id, &mut payment_idx) ||
1348                                         send_payment(&nodes[2], &nodes[1], chan_b, 10_000_000, &mut payment_id, &mut payment_idx));
1349
1350                                 last_htlc_clear_fee_a = fee_est_a.ret_val.load(atomic::Ordering::Acquire);
1351                                 last_htlc_clear_fee_b = fee_est_b.ret_val.load(atomic::Ordering::Acquire);
1352                                 last_htlc_clear_fee_c = fee_est_c.ret_val.load(atomic::Ordering::Acquire);
1353                         },
1354                         _ => test_return!(),
1355                 }
1356
1357                 if nodes[0].get_and_clear_needs_persistence() == true {
1358                         node_a_ser.0.clear();
1359                         nodes[0].write(&mut node_a_ser).unwrap();
1360                 }
1361                 if nodes[1].get_and_clear_needs_persistence() == true {
1362                         node_b_ser.0.clear();
1363                         nodes[1].write(&mut node_b_ser).unwrap();
1364                 }
1365                 if nodes[2].get_and_clear_needs_persistence() == true {
1366                         node_c_ser.0.clear();
1367                         nodes[2].write(&mut node_c_ser).unwrap();
1368                 }
1369         }
1370 }
1371
1372 /// We actually have different behavior based on if a certain log string has been seen, so we have
1373 /// to do a bit more tracking.
1374 #[derive(Clone)]
1375 struct SearchingOutput<O: Output> {
1376         output: O,
1377         may_fail: Arc<atomic::AtomicBool>,
1378 }
1379 impl<O: Output> Output for SearchingOutput<O> {
1380         fn locked_write(&self, data: &[u8]) {
1381                 // We hit a design limitation of LN state machine (see CONCURRENT_INBOUND_HTLC_FEE_BUFFER)
1382                 if std::str::from_utf8(data).unwrap().contains("Outbound update_fee HTLC buffer overflow - counterparty should force-close this channel") {
1383                         self.may_fail.store(true, atomic::Ordering::Release);
1384                 }
1385                 self.output.locked_write(data)
1386         }
1387 }
1388 impl<O: Output> SearchingOutput<O> {
1389         pub fn new(output: O) -> Self {
1390                 Self { output, may_fail: Arc::new(atomic::AtomicBool::new(false)) }
1391         }
1392 }
1393
1394 pub fn chanmon_consistency_test<Out: Output>(data: &[u8], out: Out) {
1395         do_test(data, out.clone(), false);
1396         do_test(data, out, true);
1397 }
1398
1399 #[no_mangle]
1400 pub extern "C" fn chanmon_consistency_run(data: *const u8, datalen: usize) {
1401         do_test(unsafe { std::slice::from_raw_parts(data, datalen) }, test_logger::DevNull{}, false);
1402         do_test(unsafe { std::slice::from_raw_parts(data, datalen) }, test_logger::DevNull{}, true);
1403 }