_ 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::blinded_path::payment::ReceiveTlvs;
  35 use lightning::chain;
  36 use lightning::chain::{BestBlock, ChannelMonitorUpdateStatus, chainmonitor, channelmonitor, Confirm, Watch};
  37 use lightning::chain::channelmonitor::{ChannelMonitor, MonitorEvent};
  38 use lightning::chain::transaction::OutPoint;
  39 use lightning::chain::chaininterface::{BroadcasterInterface, ConfirmationTarget, FeeEstimator};
  40 use lightning::sign::{KeyMaterial, InMemorySigner, Recipient, EntropySource, NodeSigner, SignerProvider};
  41 use lightning::events;
  42 use lightning::events::MessageSendEventsProvider;
  43 use lightning::ln::{PaymentHash, PaymentPreimage, PaymentSecret};
  44 use lightning::ln::channelmanager::{ChainParameters, ChannelDetails, ChannelManager, ChannelManagerReadArgs, PaymentId};
  45 use lightning::ln::outbound_payment::{RecipientOnionFields, PaymentSendFailure};
  46 use lightning::ln::channel::FEE_SPIKE_BUFFER_FEE_INCREASE_MULTIPLE;
  47 use lightning::ln::msgs::{self, CommitmentUpdate, ChannelMessageHandler, DecodeError, UpdateAddHTLC, Init};
  48 use lightning::ln::script::ShutdownScript;
  49 use lightning::ln::functional_test_utils::*;
  50 use lightning::offers::invoice::{BlindedPayInfo, UnsignedBolt12Invoice};
  51 use lightning::offers::invoice_request::UnsignedInvoiceRequest;
  52 use lightning::onion_message::messenger::{Destination, MessageRouter, OnionMessagePath};
  53 use lightning::util::test_channel_signer::{TestChannelSigner, EnforcementState};
  54 use lightning::util::errors::APIError;
  55 use lightning::util::logger::Logger;
  56 use lightning::util::config::UserConfig;
  57 use lightning::util::ser::{Readable, ReadableArgs, Writeable, Writer};
  58 use lightning::routing::router::{InFlightHtlcs, Path, Route, RouteHop, RouteParameters, Router};
  59
  60 use crate::utils::test_logger::{self, Output};
  61 use crate::utils::test_persister::TestPersister;
  62
  63 use bitcoin::secp256k1::{Message, PublicKey, SecretKey, Scalar, Secp256k1, self};
  64 use bitcoin::secp256k1::ecdh::SharedSecret;
  65 use bitcoin::secp256k1::ecdsa::{RecoverableSignature, Signature};
  66 use bitcoin::secp256k1::schnorr;
  67
  68 use std::mem;
  69 use std::cmp::{self, Ordering};
  70 use hashbrown::{HashSet, hash_map, HashMap};
  71 use std::sync::{Arc,Mutex};
  72 use std::sync::atomic;
  73 use std::io::Cursor;
  74 use bitcoin::bech32::u5;
  75
  76 const MAX_FEE: u32 = 10_000;
  77 struct FuzzEstimator {
  78         ret_val: atomic::AtomicU32,
  79 }
  80 impl FeeEstimator for FuzzEstimator {
  81         fn get_est_sat_per_1000_weight(&self, conf_target: ConfirmationTarget) -> u32 {
  82                 // We force-close channels if our counterparty sends us a feerate which is a small multiple
  83                 // of our HighPriority fee estimate or smaller than our Background fee estimate. Thus, we
  84                 // always return a HighPriority feerate here which is >= the maximum Normal feerate and a
  85                 // Background feerate which is <= the minimum Normal feerate.
  86                 match conf_target {
  87                         ConfirmationTarget::OnChainSweep => MAX_FEE,
  88                         ConfirmationTarget::ChannelCloseMinimum|ConfirmationTarget::AnchorChannelFee|ConfirmationTarget::MinAllowedAnchorChannelRemoteFee|ConfirmationTarget::MinAllowedNonAnchorChannelRemoteFee => 253,
  89                         ConfirmationTarget::NonAnchorChannelFee => cmp::min(self.ret_val.load(atomic::Ordering::Acquire), MAX_FEE),
  90                 }
  91         }
  92 }
  93
  94 struct FuzzRouter {}
  95
  96 impl Router for FuzzRouter {
  97         fn find_route(
  98                 &self, _payer: &PublicKey, _params: &RouteParameters, _first_hops: Option<&[&ChannelDetails]>,
  99                 _inflight_htlcs: InFlightHtlcs
 100         ) -> Result<Route, msgs::LightningError> {
 101                 Err(msgs::LightningError {
 102                         err: String::from("Not implemented"),
 103                         action: msgs::ErrorAction::IgnoreError
 104                 })
 105         }
 106
 107         fn create_blinded_payment_paths<
 108                 ES: EntropySource + ?Sized, T: secp256k1::Signing + secp256k1::Verification
 109         >(
 110                 &self, _recipient: PublicKey, _first_hops: Vec<ChannelDetails>, _tlvs: ReceiveTlvs,
 111                 _amount_msats: u64, _entropy_source: &ES, _secp_ctx: &Secp256k1<T>
 112         ) -> Result<Vec<(BlindedPayInfo, BlindedPath)>, ()> {
 113                 unreachable!()
 114         }
 115 }
 116
 117 impl MessageRouter for FuzzRouter {
 118         fn find_path(
 119                 &self, _sender: PublicKey, _peers: Vec<PublicKey>, _destination: Destination
 120         ) -> Result<OnionMessagePath, ()> {
 121                 unreachable!()
 122         }
 123
 124         fn create_blinded_paths<
 125                 ES: EntropySource + ?Sized, T: secp256k1::Signing + secp256k1::Verification
 126         >(
 127                 &self, _recipient: PublicKey, _peers: Vec<PublicKey>, _entropy_source: &ES,
 128                 _secp_ctx: &Secp256k1<T>
 129         ) -> Result<Vec<BlindedPath>, ()> {
 130                 unreachable!()
 131         }
 132 }
 133
 134 pub struct TestBroadcaster {}
 135 impl BroadcasterInterface for TestBroadcaster {
 136         fn broadcast_transactions(&self, _txs: &[&Transaction]) { }
 137 }
 138
 139 pub struct VecWriter(pub Vec<u8>);
 140 impl Writer for VecWriter {
 141         fn write_all(&mut self, buf: &[u8]) -> Result<(), ::std::io::Error> {
 142                 self.0.extend_from_slice(buf);
 143                 Ok(())
 144         }
 145 }
 146
 147 struct TestChainMonitor {
 148         pub logger: Arc<dyn Logger>,
 149         pub keys: Arc<KeyProvider>,
 150         pub persister: Arc<TestPersister>,
 151         pub chain_monitor: Arc<chainmonitor::ChainMonitor<TestChannelSigner, Arc<dyn chain::Filter>, Arc<TestBroadcaster>, Arc<FuzzEstimator>, Arc<dyn Logger>, Arc<TestPersister>>>,
 152         // If we reload a node with an old copy of ChannelMonitors, the ChannelManager deserialization
 153         // logic will automatically force-close our channels for us (as we don't have an up-to-date
 154         // monitor implying we are not able to punish misbehaving counterparties). Because this test
 155         // "fails" if we ever force-close a channel, we avoid doing so, always saving the latest
 156         // fully-serialized monitor state here, as well as the corresponding update_id.
 157         pub latest_monitors: Mutex<HashMap<OutPoint, (u64, Vec<u8>)>>,
 158 }
 159 impl TestChainMonitor {
 160         pub fn new(broadcaster: Arc<TestBroadcaster>, logger: Arc<dyn Logger>, feeest: Arc<FuzzEstimator>, persister: Arc<TestPersister>, keys: Arc<KeyProvider>) -> Self {
 161                 Self {
 162                         chain_monitor: Arc::new(chainmonitor::ChainMonitor::new(None, broadcaster, logger.clone(), feeest, Arc::clone(&persister))),
 163                         logger,
 164                         keys,
 165                         persister,
 166                         latest_monitors: Mutex::new(HashMap::new()),
 167                 }
 168         }
 169 }
 170 impl chain::Watch<TestChannelSigner> for TestChainMonitor {
 171         fn watch_channel(&self, funding_txo: OutPoint, monitor: channelmonitor::ChannelMonitor<TestChannelSigner>) -> Result<chain::ChannelMonitorUpdateStatus, ()> {
 172                 let mut ser = VecWriter(Vec::new());
 173                 monitor.write(&mut ser).unwrap();
 174                 if let Some(_) = self.latest_monitors.lock().unwrap().insert(funding_txo, (monitor.get_latest_update_id(), ser.0)) {
 175                         panic!("Already had monitor pre-watch_channel");
 176                 }
 177                 self.chain_monitor.watch_channel(funding_txo, monitor)
 178         }
 179
 180         fn update_channel(&self, funding_txo: OutPoint, update: &channelmonitor::ChannelMonitorUpdate) -> chain::ChannelMonitorUpdateStatus {
 181                 let mut map_lock = self.latest_monitors.lock().unwrap();
 182                 let mut map_entry = match map_lock.entry(funding_txo) {
 183                         hash_map::Entry::Occupied(entry) => entry,
 184                         hash_map::Entry::Vacant(_) => panic!("Didn't have monitor on update call"),
 185                 };
 186                 let deserialized_monitor = <(BlockHash, channelmonitor::ChannelMonitor<TestChannelSigner>)>::
 187                         read(&mut Cursor::new(&map_entry.get().1), (&*self.keys, &*self.keys)).unwrap().1;
 188                 deserialized_monitor.update_monitor(update, &&TestBroadcaster{}, &&FuzzEstimator { ret_val: atomic::AtomicU32::new(253) }, &self.logger).unwrap();
 189                 let mut ser = VecWriter(Vec::new());
 190                 deserialized_monitor.write(&mut ser).unwrap();
 191                 map_entry.insert((update.update_id, ser.0));
 192                 self.chain_monitor.update_channel(funding_txo, update)
 193         }
 194
 195         fn release_pending_monitor_events(&self) -> Vec<(OutPoint, Vec<MonitorEvent>, Option<PublicKey>)> {
 196                 return self.chain_monitor.release_pending_monitor_events();
 197         }
 198 }
 199
 200 struct KeyProvider {
 201         node_secret: SecretKey,
 202         rand_bytes_id: atomic::AtomicU32,
 203         enforcement_states: Mutex<HashMap<[u8;32], Arc<Mutex<EnforcementState>>>>,
 204 }
 205
 206 impl EntropySource for KeyProvider {
 207         fn get_secure_random_bytes(&self) -> [u8; 32] {
 208                 let id = self.rand_bytes_id.fetch_add(1, atomic::Ordering::Relaxed);
 209                 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]];
 210                 res[30-4..30].copy_from_slice(&id.to_le_bytes());
 211                 res
 212         }
 213 }
 214
 215 impl NodeSigner for KeyProvider {
 216         fn get_node_id(&self, recipient: Recipient) -> Result<PublicKey, ()> {
 217                 let node_secret = match recipient {
 218                         Recipient::Node => Ok(&self.node_secret),
 219                         Recipient::PhantomNode => Err(())
 220                 }?;
 221                 Ok(PublicKey::from_secret_key(&Secp256k1::signing_only(), node_secret))
 222         }
 223
 224         fn ecdh(&self, recipient: Recipient, other_key: &PublicKey, tweak: Option<&Scalar>) -> Result<SharedSecret, ()> {
 225                 let mut node_secret = match recipient {
 226                         Recipient::Node => Ok(self.node_secret.clone()),
 227                         Recipient::PhantomNode => Err(())
 228                 }?;
 229                 if let Some(tweak) = tweak {
 230                         node_secret = node_secret.mul_tweak(tweak).map_err(|_| ())?;
 231                 }
 232                 Ok(SharedSecret::new(other_key, &node_secret))
 233         }
 234
 235         fn get_inbound_payment_key_material(&self) -> KeyMaterial {
 236                 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]])
 237         }
 238
 239         fn sign_invoice(&self, _hrp_bytes: &[u8], _invoice_data: &[u5], _recipient: Recipient) -> Result<RecoverableSignature, ()> {
 240                 unreachable!()
 241         }
 242
 243         fn sign_bolt12_invoice_request(
 244                 &self, _invoice_request: &UnsignedInvoiceRequest
 245         ) -> Result<schnorr::Signature, ()> {
 246                 unreachable!()
 247         }
 248
 249         fn sign_bolt12_invoice(
 250                 &self, _invoice: &UnsignedBolt12Invoice,
 251         ) -> Result<schnorr::Signature, ()> {
 252                 unreachable!()
 253         }
 254
 255         fn sign_gossip_message(&self, msg: lightning::ln::msgs::UnsignedGossipMessage) -> Result<Signature, ()> {
 256                 let msg_hash = Message::from_slice(&Sha256dHash::hash(&msg.encode()[..])[..]).map_err(|_| ())?;
 257                 let secp_ctx = Secp256k1::signing_only();
 258                 Ok(secp_ctx.sign_ecdsa(&msg_hash, &self.node_secret))
 259         }
 260 }
 261
 262 impl SignerProvider for KeyProvider {
 263         type EcdsaSigner = TestChannelSigner;
 264         #[cfg(taproot)]
 265         type TaprootSigner = TestChannelSigner;
 266
 267         fn generate_channel_keys_id(&self, _inbound: bool, _channel_value_satoshis: u64, _user_channel_id: u128) -> [u8; 32] {
 268                 let id = self.rand_bytes_id.fetch_add(1, atomic::Ordering::Relaxed) as u8;
 269                 [id; 32]
 270         }
 271
 272         fn derive_channel_signer(&self, channel_value_satoshis: u64, channel_keys_id: [u8; 32]) -> Self::EcdsaSigner {
 273                 let secp_ctx = Secp256k1::signing_only();
 274                 let id = channel_keys_id[0];
 275                 let keys = InMemorySigner::new(
 276                         &secp_ctx,
 277                         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(),
 278                         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(),
 279                         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(),
 280                         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(),
 281                         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(),
 282                         [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]],
 283                         channel_value_satoshis,
 284                         channel_keys_id,
 285                         channel_keys_id,
 286                 );
 287                 let revoked_commitment = self.make_enforcement_state_cell(keys.commitment_seed);
 288                 TestChannelSigner::new_with_revoked(keys, revoked_commitment, false)
 289         }
 290
 291         fn read_chan_signer(&self, buffer: &[u8]) -> Result<Self::EcdsaSigner, DecodeError> {
 292                 let mut reader = std::io::Cursor::new(buffer);
 293
 294                 let inner: InMemorySigner = ReadableArgs::read(&mut reader, self)?;
 295                 let state = self.make_enforcement_state_cell(inner.commitment_seed);
 296
 297                 Ok(TestChannelSigner {
 298                         inner,
 299                         state,
 300                         disable_revocation_policy_check: false,
 301                         available: Arc::new(Mutex::new(true)),
 302                 })
 303         }
 304
 305         fn get_destination_script(&self, _channel_keys_id: [u8; 32]) -> Result<ScriptBuf, ()> {
 306                 let secp_ctx = Secp256k1::signing_only();
 307                 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();
 308                 let our_channel_monitor_claim_key_hash = WPubkeyHash::hash(&PublicKey::from_secret_key(&secp_ctx, &channel_monitor_claim_key).serialize());
 309                 Ok(Builder::new().push_opcode(opcodes::all::OP_PUSHBYTES_0).push_slice(our_channel_monitor_claim_key_hash).into_script())
 310         }
 311
 312         fn get_shutdown_scriptpubkey(&self) -> Result<ShutdownScript, ()> {
 313                 let secp_ctx = Secp256k1::signing_only();
 314                 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();
 315                 let pubkey_hash = WPubkeyHash::hash(&PublicKey::from_secret_key(&secp_ctx, &secret_key).serialize());
 316                 Ok(ShutdownScript::new_p2wpkh(&pubkey_hash))
 317         }
 318 }
 319
 320 impl KeyProvider {
 321         fn make_enforcement_state_cell(&self, commitment_seed: [u8; 32]) -> Arc<Mutex<EnforcementState>> {
 322                 let mut revoked_commitments = self.enforcement_states.lock().unwrap();
 323                 if !revoked_commitments.contains_key(&commitment_seed) {
 324                         revoked_commitments.insert(commitment_seed, Arc::new(Mutex::new(EnforcementState::new())));
 325                 }
 326                 let cell = revoked_commitments.get(&commitment_seed).unwrap();
 327                 Arc::clone(cell)
 328         }
 329 }
 330
 331 #[inline]
 332 fn check_api_err(api_err: APIError, sendable_bounds_violated: bool) {
 333         match api_err {
 334                 APIError::APIMisuseError { .. } => panic!("We can't misuse the API"),
 335                 APIError::FeeRateTooHigh { .. } => panic!("We can't send too much fee?"),
 336                 APIError::InvalidRoute { .. } => panic!("Our routes should work"),
 337                 APIError::ChannelUnavailable { err } => {
 338                         // Test the error against a list of errors we can hit, and reject
 339                         // all others. If you hit this panic, the list of acceptable errors
 340                         // is probably just stale and you should add new messages here.
 341                         match err.as_str() {
 342                                 "Peer for first hop currently disconnected" => {},
 343                                 _ if err.starts_with("Cannot send less than our next-HTLC minimum - ") => {},
 344                                 _ if err.starts_with("Cannot send more than our next-HTLC maximum - ") => {},
 345                                 _ => panic!("{}", err),
 346                         }
 347                         assert!(sendable_bounds_violated);
 348                 },
 349                 APIError::MonitorUpdateInProgress => {
 350                         // We can (obviously) temp-fail a monitor update
 351                 },
 352                 APIError::IncompatibleShutdownScript { .. } => panic!("Cannot send an incompatible shutdown script"),
 353         }
 354 }
 355 #[inline]
 356 fn check_payment_err(send_err: PaymentSendFailure, sendable_bounds_violated: bool) {
 357         match send_err {
 358                 PaymentSendFailure::ParameterError(api_err) => check_api_err(api_err, sendable_bounds_violated),
 359                 PaymentSendFailure::PathParameterError(per_path_results) => {
 360                         for res in per_path_results { if let Err(api_err) = res { check_api_err(api_err, sendable_bounds_violated); } }
 361                 },
 362                 PaymentSendFailure::AllFailedResendSafe(per_path_results) => {
 363                         for api_err in per_path_results { check_api_err(api_err, sendable_bounds_violated); }
 364                 },
 365                 PaymentSendFailure::PartialFailure { results, .. } => {
 366                         for res in results { if let Err(api_err) = res { check_api_err(api_err, sendable_bounds_violated); } }
 367                 },
 368                 PaymentSendFailure::DuplicatePayment => panic!(),
 369         }
 370 }
 371
 372 type ChanMan<'a> = ChannelManager<Arc<TestChainMonitor>, Arc<TestBroadcaster>, Arc<KeyProvider>, Arc<KeyProvider>, Arc<KeyProvider>, Arc<FuzzEstimator>, &'a FuzzRouter, Arc<dyn Logger>>;
 373
 374 #[inline]
 375 fn get_payment_secret_hash(dest: &ChanMan, payment_id: &mut u8) -> Option<(PaymentSecret, PaymentHash)> {
 376         let mut payment_hash;
 377         for _ in 0..256 {
 378                 payment_hash = PaymentHash(Sha256::hash(&[*payment_id; 1]).to_byte_array());
 379                 if let Ok(payment_secret) = dest.create_inbound_payment_for_hash(payment_hash, None, 3600, None) {
 380                         return Some((payment_secret, payment_hash));
 381                 }
 382                 *payment_id = payment_id.wrapping_add(1);
 383         }
 384         None
 385 }
 386
 387 #[inline]
 388 fn send_payment(source: &ChanMan, dest: &ChanMan, dest_chan_id: u64, amt: u64, payment_id: &mut u8, payment_idx: &mut u64) -> bool {
 389         let (payment_secret, payment_hash) =
 390                 if let Some((secret, hash)) = get_payment_secret_hash(dest, payment_id) { (secret, hash) } else { return true; };
 391         let mut payment_id = [0; 32];
 392         payment_id[0..8].copy_from_slice(&payment_idx.to_ne_bytes());
 393         *payment_idx += 1;
 394         let (min_value_sendable, max_value_sendable) = source.list_usable_channels()
 395                 .iter().find(|chan| chan.short_channel_id == Some(dest_chan_id))
 396                 .map(|chan|
 397                         (chan.next_outbound_htlc_minimum_msat, chan.next_outbound_htlc_limit_msat))
 398                 .unwrap_or((0, 0));
 399         if let Err(err) = source.send_payment_with_route(&Route {
 400                 paths: vec![Path { hops: vec![RouteHop {
 401                         pubkey: dest.get_our_node_id(),
 402                         node_features: dest.node_features(),
 403                         short_channel_id: dest_chan_id,
 404                         channel_features: dest.channel_features(),
 405                         fee_msat: amt,
 406                         cltv_expiry_delta: 200,
 407                         maybe_announced_channel: true,
 408                 }], blinded_tail: None }],
 409                 route_params: None,
 410         }, payment_hash, RecipientOnionFields::secret_only(payment_secret), PaymentId(payment_id)) {
 411                 check_payment_err(err, amt > max_value_sendable || amt < min_value_sendable);
 412                 false
 413         } else {
 414                 // Note that while the max is a strict upper-bound, we can occasionally send substantially
 415                 // below the minimum, with some gap which is unusable immediately below the minimum. Thus,
 416                 // we don't check against min_value_sendable here.
 417                 assert!(amt <= max_value_sendable);
 418                 true
 419         }
 420 }
 421 #[inline]
 422 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 {
 423         let (payment_secret, payment_hash) =
 424                 if let Some((secret, hash)) = get_payment_secret_hash(dest, payment_id) { (secret, hash) } else { return true; };
 425         let mut payment_id = [0; 32];
 426         payment_id[0..8].copy_from_slice(&payment_idx.to_ne_bytes());
 427         *payment_idx += 1;
 428         let (min_value_sendable, max_value_sendable) = source.list_usable_channels()
 429                 .iter().find(|chan| chan.short_channel_id == Some(middle_chan_id))
 430                 .map(|chan|
 431                         (chan.next_outbound_htlc_minimum_msat, chan.next_outbound_htlc_limit_msat))
 432                 .unwrap_or((0, 0));
 433         let first_hop_fee = 50_000;
 434         if let Err(err) = source.send_payment_with_route(&Route {
 435                 paths: vec![Path { hops: vec![RouteHop {
 436                         pubkey: middle.get_our_node_id(),
 437                         node_features: middle.node_features(),
 438                         short_channel_id: middle_chan_id,
 439                         channel_features: middle.channel_features(),
 440                         fee_msat: first_hop_fee,
 441                         cltv_expiry_delta: 100,
 442                         maybe_announced_channel: true,
 443                 }, RouteHop {
 444                         pubkey: dest.get_our_node_id(),
 445                         node_features: dest.node_features(),
 446                         short_channel_id: dest_chan_id,
 447                         channel_features: dest.channel_features(),
 448                         fee_msat: amt,
 449                         cltv_expiry_delta: 200,
 450                         maybe_announced_channel: true,
 451                 }], blinded_tail: None }],
 452                 route_params: None,
 453         }, payment_hash, RecipientOnionFields::secret_only(payment_secret), PaymentId(payment_id)) {
 454                 let sent_amt = amt + first_hop_fee;
 455                 check_payment_err(err, sent_amt < min_value_sendable || sent_amt > max_value_sendable);
 456                 false
 457         } else {
 458                 // Note that while the max is a strict upper-bound, we can occasionally send substantially
 459                 // below the minimum, with some gap which is unusable immediately below the minimum. Thus,
 460                 // we don't check against min_value_sendable here.
 461                 assert!(amt + first_hop_fee <= max_value_sendable);
 462                 true
 463         }
 464 }
 465
 466 #[inline]
 467 pub fn do_test<Out: Output>(data: &[u8], underlying_out: Out, anchors: bool) {
 468         let out = SearchingOutput::new(underlying_out);
 469         let broadcast = Arc::new(TestBroadcaster{});
 470         let router = FuzzRouter {};
 471
 472         macro_rules! make_node {
 473                 ($node_id: expr, $fee_estimator: expr) => { {
 474                         let logger: Arc<dyn Logger> = Arc::new(test_logger::TestLogger::new($node_id.to_string(), out.clone()));
 475                         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();
 476                         let keys_manager = Arc::new(KeyProvider { node_secret, rand_bytes_id: atomic::AtomicU32::new(0), enforcement_states: Mutex::new(HashMap::new()) });
 477                         let monitor = Arc::new(TestChainMonitor::new(broadcast.clone(), logger.clone(), $fee_estimator.clone(),
 478                                 Arc::new(TestPersister {
 479                                         update_ret: Mutex::new(ChannelMonitorUpdateStatus::Completed)
 480                                 }), Arc::clone(&keys_manager)));
 481
 482                         let mut config = UserConfig::default();
 483                         config.channel_config.forwarding_fee_proportional_millionths = 0;
 484                         config.channel_handshake_config.announced_channel = true;
 485                         if anchors {
 486                                 config.channel_handshake_config.negotiate_anchors_zero_fee_htlc_tx = true;
 487                                 config.manually_accept_inbound_channels = true;
 488                         }
 489                         let network = Network::Bitcoin;
 490                         let best_block_timestamp = genesis_block(network).header.time;
 491                         let params = ChainParameters {
 492                                 network,
 493                                 best_block: BestBlock::from_network(network),
 494                         };
 495                         (ChannelManager::new($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),
 496                         monitor, keys_manager)
 497                 } }
 498         }
 499
 500         macro_rules! reload_node {
 501                 ($ser: expr, $node_id: expr, $old_monitors: expr, $keys_manager: expr, $fee_estimator: expr) => { {
 502                     let keys_manager = Arc::clone(& $keys_manager);
 503                         let logger: Arc<dyn Logger> = Arc::new(test_logger::TestLogger::new($node_id.to_string(), out.clone()));
 504                         let chain_monitor = Arc::new(TestChainMonitor::new(broadcast.clone(), logger.clone(), $fee_estimator.clone(),
 505                                 Arc::new(TestPersister {
 506                                         update_ret: Mutex::new(ChannelMonitorUpdateStatus::Completed)
 507                                 }), Arc::clone(& $keys_manager)));
 508
 509                         let mut config = UserConfig::default();
 510                         config.channel_config.forwarding_fee_proportional_millionths = 0;
 511                         config.channel_handshake_config.announced_channel = true;
 512                         if anchors {
 513                                 config.channel_handshake_config.negotiate_anchors_zero_fee_htlc_tx = true;
 514                                 config.manually_accept_inbound_channels = true;
 515                         }
 516
 517                         let mut monitors = HashMap::new();
 518                         let mut old_monitors = $old_monitors.latest_monitors.lock().unwrap();
 519                         for (outpoint, (update_id, monitor_ser)) in old_monitors.drain() {
 520                                 monitors.insert(outpoint, <(BlockHash, ChannelMonitor<TestChannelSigner>)>::read(&mut Cursor::new(&monitor_ser), (&*$keys_manager, &*$keys_manager)).expect("Failed to read monitor").1);
 521                                 chain_monitor.latest_monitors.lock().unwrap().insert(outpoint, (update_id, monitor_ser));
 522                         }
 523                         let mut monitor_refs = HashMap::new();
 524                         for (outpoint, monitor) in monitors.iter_mut() {
 525                                 monitor_refs.insert(*outpoint, monitor);
 526                         }
 527
 528                         let read_args = ChannelManagerReadArgs {
 529                                 entropy_source: keys_manager.clone(),
 530                                 node_signer: keys_manager.clone(),
 531                                 signer_provider: keys_manager.clone(),
 532                                 fee_estimator: $fee_estimator.clone(),
 533                                 chain_monitor: chain_monitor.clone(),
 534                                 tx_broadcaster: broadcast.clone(),
 535                                 router: &router,
 536                                 logger,
 537                                 default_config: config,
 538                                 channel_monitors: monitor_refs,
 539                         };
 540
 541                         let res = (<(BlockHash, ChanMan)>::read(&mut Cursor::new(&$ser.0), read_args).expect("Failed to read manager").1, chain_monitor.clone());
 542                         for (funding_txo, mon) in monitors.drain() {
 543                                 assert_eq!(chain_monitor.chain_monitor.watch_channel(funding_txo, mon),
 544                                         Ok(ChannelMonitorUpdateStatus::Completed));
 545                         }
 546                         res
 547                 } }
 548         }
 549
 550         let mut channel_txn = Vec::new();
 551         macro_rules! make_channel {
 552                 ($source: expr, $dest: expr, $dest_keys_manager: expr, $chan_id: expr) => { {
 553                         $source.peer_connected(&$dest.get_our_node_id(), &Init {
 554                                 features: $dest.init_features(), networks: None, remote_network_address: None
 555                         }, true).unwrap();
 556                         $dest.peer_connected(&$source.get_our_node_id(), &Init {
 557                                 features: $source.init_features(), networks: None, remote_network_address: None
 558                         }, false).unwrap();
 559
 560                         $source.create_channel($dest.get_our_node_id(), 100_000, 42, 0, None, None).unwrap();
 561                         let open_channel = {
 562                                 let events = $source.get_and_clear_pending_msg_events();
 563                                 assert_eq!(events.len(), 1);
 564                                 if let events::MessageSendEvent::SendOpenChannel { ref msg, .. } = events[0] {
 565                                         msg.clone()
 566                                 } else { panic!("Wrong event type"); }
 567                         };
 568
 569                         $dest.handle_open_channel(&$source.get_our_node_id(), &open_channel);
 570                         let accept_channel = {
 571                                 if anchors {
 572                                         let events = $dest.get_and_clear_pending_events();
 573                                         assert_eq!(events.len(), 1);
 574                                         if let events::Event::OpenChannelRequest {
 575                                                 ref temporary_channel_id, ref counterparty_node_id, ..
 576                                         } = events[0] {
 577                                                 let mut random_bytes = [0u8; 16];
 578                                                 random_bytes.copy_from_slice(&$dest_keys_manager.get_secure_random_bytes()[..16]);
 579                                                 let user_channel_id = u128::from_be_bytes(random_bytes);
 580                                                 $dest.accept_inbound_channel(
 581                                                         temporary_channel_id,
 582                                                         counterparty_node_id,
 583                                                         user_channel_id,
 584                                                 ).unwrap();
 585                                         } else { panic!("Wrong event type"); }
 586                                 }
 587                                 let events = $dest.get_and_clear_pending_msg_events();
 588                                 assert_eq!(events.len(), 1);
 589                                 if let events::MessageSendEvent::SendAcceptChannel { ref msg, .. } = events[0] {
 590                                         msg.clone()
 591                                 } else { panic!("Wrong event type"); }
 592                         };
 593
 594                         $source.handle_accept_channel(&$dest.get_our_node_id(), &accept_channel);
 595                         let funding_output;
 596                         {
 597                                 let events = $source.get_and_clear_pending_events();
 598                                 assert_eq!(events.len(), 1);
 599                                 if let events::Event::FundingGenerationReady { ref temporary_channel_id, ref channel_value_satoshis, ref output_script, .. } = events[0] {
 600                                         let tx = Transaction { version: $chan_id, lock_time: LockTime::ZERO, input: Vec::new(), output: vec![TxOut {
 601                                                 value: *channel_value_satoshis, script_pubkey: output_script.clone(),
 602                                         }]};
 603                                         funding_output = OutPoint { txid: tx.txid(), index: 0 };
 604                                         $source.funding_transaction_generated(&temporary_channel_id, &$dest.get_our_node_id(), tx.clone()).unwrap();
 605                                         channel_txn.push(tx);
 606                                 } else { panic!("Wrong event type"); }
 607                         }
 608
 609                         let funding_created = {
 610                                 let events = $source.get_and_clear_pending_msg_events();
 611                                 assert_eq!(events.len(), 1);
 612                                 if let events::MessageSendEvent::SendFundingCreated { ref msg, .. } = events[0] {
 613                                         msg.clone()
 614                                 } else { panic!("Wrong event type"); }
 615                         };
 616                         $dest.handle_funding_created(&$source.get_our_node_id(), &funding_created);
 617
 618                         let funding_signed = {
 619                                 let events = $dest.get_and_clear_pending_msg_events();
 620                                 assert_eq!(events.len(), 1);
 621                                 if let events::MessageSendEvent::SendFundingSigned { ref msg, .. } = events[0] {
 622                                         msg.clone()
 623                                 } else { panic!("Wrong event type"); }
 624                         };
 625                         let events = $dest.get_and_clear_pending_events();
 626                         assert_eq!(events.len(), 1);
 627                         if let events::Event::ChannelPending{ ref counterparty_node_id, .. } = events[0] {
 628                                 assert_eq!(counterparty_node_id, &$source.get_our_node_id());
 629                         } else { panic!("Wrong event type"); }
 630
 631                         $source.handle_funding_signed(&$dest.get_our_node_id(), &funding_signed);
 632                         let events = $source.get_and_clear_pending_events();
 633                         assert_eq!(events.len(), 1);
 634                         if let events::Event::ChannelPending{ ref counterparty_node_id, .. } = events[0] {
 635                                 assert_eq!(counterparty_node_id, &$dest.get_our_node_id());
 636                         } else { panic!("Wrong event type"); }
 637
 638                         funding_output
 639                 } }
 640         }
 641
 642         macro_rules! confirm_txn {
 643                 ($node: expr) => { {
 644                         let chain_hash = genesis_block(Network::Bitcoin).block_hash();
 645                         let mut header = create_dummy_header(chain_hash, 42);
 646                         let txdata: Vec<_> = channel_txn.iter().enumerate().map(|(i, tx)| (i + 1, tx)).collect();
 647                         $node.transactions_confirmed(&header, &txdata, 1);
 648                         for _ in 2..100 {
 649                                 header = create_dummy_header(header.block_hash(), 42);
 650                         }
 651                         $node.best_block_updated(&header, 99);
 652                 } }
 653         }
 654
 655         macro_rules! lock_fundings {
 656                 ($nodes: expr) => { {
 657                         let mut node_events = Vec::new();
 658                         for node in $nodes.iter() {
 659                                 node_events.push(node.get_and_clear_pending_msg_events());
 660                         }
 661                         for (idx, node_event) in node_events.iter().enumerate() {
 662                                 for event in node_event {
 663                                         if let events::MessageSendEvent::SendChannelReady { ref node_id, ref msg } = event {
 664                                                 for node in $nodes.iter() {
 665                                                         if node.get_our_node_id() == *node_id {
 666                                                                 node.handle_channel_ready(&$nodes[idx].get_our_node_id(), msg);
 667                                                         }
 668                                                 }
 669                                         } else { panic!("Wrong event type"); }
 670                                 }
 671                         }
 672
 673                         for node in $nodes.iter() {
 674                                 let events = node.get_and_clear_pending_msg_events();
 675                                 for event in events {
 676                                         if let events::MessageSendEvent::SendAnnouncementSignatures { .. } = event {
 677                                         } else { panic!("Wrong event type"); }
 678                                 }
 679                         }
 680                 } }
 681         }
 682
 683         let fee_est_a = Arc::new(FuzzEstimator { ret_val: atomic::AtomicU32::new(253) });
 684         let mut last_htlc_clear_fee_a =  253;
 685         let fee_est_b = Arc::new(FuzzEstimator { ret_val: atomic::AtomicU32::new(253) });
 686         let mut last_htlc_clear_fee_b =  253;
 687         let fee_est_c = Arc::new(FuzzEstimator { ret_val: atomic::AtomicU32::new(253) });
 688         let mut last_htlc_clear_fee_c =  253;
 689
 690         // 3 nodes is enough to hit all the possible cases, notably unknown-source-unknown-dest
 691         // forwarding.
 692         let (node_a, mut monitor_a, keys_manager_a) = make_node!(0, fee_est_a);
 693         let (node_b, mut monitor_b, keys_manager_b) = make_node!(1, fee_est_b);
 694         let (node_c, mut monitor_c, keys_manager_c) = make_node!(2, fee_est_c);
 695
 696         let mut nodes = [node_a, node_b, node_c];
 697
 698         let chan_1_funding = make_channel!(nodes[0], nodes[1], keys_manager_b, 0);
 699         let chan_2_funding = make_channel!(nodes[1], nodes[2], keys_manager_c, 1);
 700
 701         for node in nodes.iter() {
 702                 confirm_txn!(node);
 703         }
 704
 705         lock_fundings!(nodes);
 706
 707         let chan_a = nodes[0].list_usable_channels()[0].short_channel_id.unwrap();
 708         let chan_b = nodes[2].list_usable_channels()[0].short_channel_id.unwrap();
 709
 710         let mut payment_id: u8 = 0;
 711         let mut payment_idx: u64 = 0;
 712
 713         let mut chan_a_disconnected = false;
 714         let mut chan_b_disconnected = false;
 715         let mut ab_events = Vec::new();
 716         let mut ba_events = Vec::new();
 717         let mut bc_events = Vec::new();
 718         let mut cb_events = Vec::new();
 719
 720         let mut node_a_ser = VecWriter(Vec::new());
 721         nodes[0].write(&mut node_a_ser).unwrap();
 722         let mut node_b_ser = VecWriter(Vec::new());
 723         nodes[1].write(&mut node_b_ser).unwrap();
 724         let mut node_c_ser = VecWriter(Vec::new());
 725         nodes[2].write(&mut node_c_ser).unwrap();
 726
 727         macro_rules! test_return {
 728                 () => { {
 729                         assert_eq!(nodes[0].list_channels().len(), 1);
 730                         assert_eq!(nodes[1].list_channels().len(), 2);
 731                         assert_eq!(nodes[2].list_channels().len(), 1);
 732                         return;
 733                 } }
 734         }
 735
 736         let mut read_pos = 0;
 737         macro_rules! get_slice {
 738                 ($len: expr) => {
 739                         {
 740                                 let slice_len = $len as usize;
 741                                 if data.len() < read_pos + slice_len {
 742                                         test_return!();
 743                                 }
 744                                 read_pos += slice_len;
 745                                 &data[read_pos - slice_len..read_pos]
 746                         }
 747                 }
 748         }
 749
 750         loop {
 751                 // Push any events from Node B onto ba_events and bc_events
 752                 macro_rules! push_excess_b_events {
 753                         ($excess_events: expr, $expect_drop_node: expr) => { {
 754                                 let a_id = nodes[0].get_our_node_id();
 755                                 let expect_drop_node: Option<usize> = $expect_drop_node;
 756                                 let expect_drop_id = if let Some(id) = expect_drop_node { Some(nodes[id].get_our_node_id()) } else { None };
 757                                 for event in $excess_events {
 758                                         let push_a = match event {
 759                                                 events::MessageSendEvent::UpdateHTLCs { ref node_id, .. } => {
 760                                                         if Some(*node_id) == expect_drop_id { panic!("peer_disconnected should drop msgs bound for the disconnected peer"); }
 761                                                         *node_id == a_id
 762                                                 },
 763                                                 events::MessageSendEvent::SendRevokeAndACK { ref node_id, .. } => {
 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                                                 events::MessageSendEvent::SendChannelReestablish { ref node_id, .. } => {
 768                                                         if Some(*node_id) == expect_drop_id { panic!("peer_disconnected should drop msgs bound for the disconnected peer"); }
 769                                                         *node_id == a_id
 770                                                 },
 771                                                 events::MessageSendEvent::SendChannelReady { .. } => continue,
 772                                                 events::MessageSendEvent::SendAnnouncementSignatures { .. } => continue,
 773                                                 events::MessageSendEvent::SendChannelUpdate { ref node_id, ref msg } => {
 774                                                         assert_eq!(msg.contents.flags & 2, 0); // The disable bit must never be set!
 775                                                         if Some(*node_id) == expect_drop_id { panic!("peer_disconnected should drop msgs bound for the disconnected peer"); }
 776                                                         *node_id == a_id
 777                                                 },
 778                                                 _ => panic!("Unhandled message event {:?}", event),
 779                                         };
 780                                         if push_a { ba_events.push(event); } else { bc_events.push(event); }
 781                                 }
 782                         } }
 783                 }
 784
 785                 // While delivering messages, we select across three possible message selection processes
 786                 // to ensure we get as much coverage as possible. See the individual enum variants for more
 787                 // details.
 788                 #[derive(PartialEq)]
 789                 enum ProcessMessages {
 790                         /// Deliver all available messages, including fetching any new messages from
 791                         /// `get_and_clear_pending_msg_events()` (which may have side effects).
 792                         AllMessages,
 793                         /// Call `get_and_clear_pending_msg_events()` first, and then deliver up to one
 794                         /// message (which may already be queued).
 795                         OneMessage,
 796                         /// Deliver up to one already-queued message. This avoids any potential side-effects
 797                         /// of `get_and_clear_pending_msg_events()` (eg freeing the HTLC holding cell), which
 798                         /// provides potentially more coverage.
 799                         OnePendingMessage,
 800                 }
 801
 802                 macro_rules! process_msg_events {
 803                         ($node: expr, $corrupt_forward: expr, $limit_events: expr) => { {
 804                                 let mut events = if $node == 1 {
 805                                         let mut new_events = Vec::new();
 806                                         mem::swap(&mut new_events, &mut ba_events);
 807                                         new_events.extend_from_slice(&bc_events[..]);
 808                                         bc_events.clear();
 809                                         new_events
 810                                 } else if $node == 0 {
 811                                         let mut new_events = Vec::new();
 812                                         mem::swap(&mut new_events, &mut ab_events);
 813                                         new_events
 814                                 } else {
 815                                         let mut new_events = Vec::new();
 816                                         mem::swap(&mut new_events, &mut cb_events);
 817                                         new_events
 818                                 };
 819                                 let mut new_events = Vec::new();
 820                                 if $limit_events != ProcessMessages::OnePendingMessage {
 821                                         new_events = nodes[$node].get_and_clear_pending_msg_events();
 822                                 }
 823                                 let mut had_events = false;
 824                                 let mut events_iter = events.drain(..).chain(new_events.drain(..));
 825                                 let mut extra_ev = None;
 826                                 for event in &mut events_iter {
 827                                         had_events = true;
 828                                         match event {
 829                                                 events::MessageSendEvent::UpdateHTLCs { node_id, updates: CommitmentUpdate { update_add_htlcs, update_fail_htlcs, update_fulfill_htlcs, update_fail_malformed_htlcs, update_fee, commitment_signed } } => {
 830                                                         for (idx, dest) in nodes.iter().enumerate() {
 831                                                                 if dest.get_our_node_id() == node_id {
 832                                                                         for update_add in update_add_htlcs.iter() {
 833                                                                                 out.locked_write(format!("Delivering update_add_htlc to node {}.\n", idx).as_bytes());
 834                                                                                 if !$corrupt_forward {
 835                                                                                         dest.handle_update_add_htlc(&nodes[$node].get_our_node_id(), update_add);
 836                                                                                 } else {
 837                                                                                         // Corrupt the update_add_htlc message so that its HMAC
 838                                                                                         // check will fail and we generate a
 839                                                                                         // update_fail_malformed_htlc instead of an
 840                                                                                         // update_fail_htlc as we do when we reject a payment.
 841                                                                                         let mut msg_ser = update_add.encode();
 842                                                                                         msg_ser[1000] ^= 0xff;
 843                                                                                         let new_msg = UpdateAddHTLC::read(&mut Cursor::new(&msg_ser)).unwrap();
 844                                                                                         dest.handle_update_add_htlc(&nodes[$node].get_our_node_id(), &new_msg);
 845                                                                                 }
 846                                                                         }
 847                                                                         for update_fulfill in update_fulfill_htlcs.iter() {
 848                                                                                 out.locked_write(format!("Delivering update_fulfill_htlc to node {}.\n", idx).as_bytes());
 849                                                                                 dest.handle_update_fulfill_htlc(&nodes[$node].get_our_node_id(), update_fulfill);
 850                                                                         }
 851                                                                         for update_fail in update_fail_htlcs.iter() {
 852                                                                                 out.locked_write(format!("Delivering update_fail_htlc to node {}.\n", idx).as_bytes());
 853                                                                                 dest.handle_update_fail_htlc(&nodes[$node].get_our_node_id(), update_fail);
 854                                                                         }
 855                                                                         for update_fail_malformed in update_fail_malformed_htlcs.iter() {
 856                                                                                 out.locked_write(format!("Delivering update_fail_malformed_htlc to node {}.\n", idx).as_bytes());
 857                                                                                 dest.handle_update_fail_malformed_htlc(&nodes[$node].get_our_node_id(), update_fail_malformed);
 858                                                                         }
 859                                                                         if let Some(msg) = update_fee {
 860                                                                                 out.locked_write(format!("Delivering update_fee to node {}.\n", idx).as_bytes());
 861                                                                                 dest.handle_update_fee(&nodes[$node].get_our_node_id(), &msg);
 862                                                                         }
 863                                                                         let processed_change = !update_add_htlcs.is_empty() || !update_fulfill_htlcs.is_empty() ||
 864                                                                                 !update_fail_htlcs.is_empty() || !update_fail_malformed_htlcs.is_empty();
 865                                                                         if $limit_events != ProcessMessages::AllMessages && processed_change {
 866                                                                                 // If we only want to process some messages, don't deliver the CS until later.
 867                                                                                 extra_ev = Some(events::MessageSendEvent::UpdateHTLCs { node_id, updates: CommitmentUpdate {
 868                                                                                         update_add_htlcs: Vec::new(),
 869                                                                                         update_fail_htlcs: Vec::new(),
 870                                                                                         update_fulfill_htlcs: Vec::new(),
 871                                                                                         update_fail_malformed_htlcs: Vec::new(),
 872                                                                                         update_fee: None,
 873                                                                                         commitment_signed
 874                                                                                 } });
 875                                                                                 break;
 876                                                                         }
 877                                                                         out.locked_write(format!("Delivering commitment_signed to node {}.\n", idx).as_bytes());
 878                                                                         dest.handle_commitment_signed(&nodes[$node].get_our_node_id(), &commitment_signed);
 879                                                                         break;
 880                                                                 }
 881                                                         }
 882                                                 },
 883                                                 events::MessageSendEvent::SendRevokeAndACK { ref node_id, ref msg } => {
 884                                                         for (idx, dest) in nodes.iter().enumerate() {
 885                                                                 if dest.get_our_node_id() == *node_id {
 886                                                                         out.locked_write(format!("Delivering revoke_and_ack to node {}.\n", idx).as_bytes());
 887                                                                         dest.handle_revoke_and_ack(&nodes[$node].get_our_node_id(), msg);
 888                                                                 }
 889                                                         }
 890                                                 },
 891                                                 events::MessageSendEvent::SendChannelReestablish { ref node_id, ref msg } => {
 892                                                         for (idx, dest) in nodes.iter().enumerate() {
 893                                                                 if dest.get_our_node_id() == *node_id {
 894                                                                         out.locked_write(format!("Delivering channel_reestablish to node {}.\n", idx).as_bytes());
 895                                                                         dest.handle_channel_reestablish(&nodes[$node].get_our_node_id(), msg);
 896                                                                 }
 897                                                         }
 898                                                 },
 899                                                 events::MessageSendEvent::SendChannelReady { .. } => {
 900                                                         // Can be generated as a reestablish response
 901                                                 },
 902                                                 events::MessageSendEvent::SendAnnouncementSignatures { .. } => {
 903                                                         // Can be generated as a reestablish response
 904                                                 },
 905                                                 events::MessageSendEvent::SendChannelUpdate { ref msg, .. } => {
 906                                                         // When we reconnect we will resend a channel_update to make sure our
 907                                                         // counterparty has the latest parameters for receiving payments
 908                                                         // through us. We do, however, check that the message does not include
 909                                                         // the "disabled" bit, as we should never ever have a channel which is
 910                                                         // disabled when we send such an update (or it may indicate channel
 911                                                         // force-close which we should detect as an error).
 912                                                         assert_eq!(msg.contents.flags & 2, 0);
 913                                                 },
 914                                                 _ => if out.may_fail.load(atomic::Ordering::Acquire) {
 915                                                         return;
 916                                                 } else {
 917                                                         panic!("Unhandled message event {:?}", event)
 918                                                 },
 919                                         }
 920                                         if $limit_events != ProcessMessages::AllMessages {
 921                                                 break;
 922                                         }
 923                                 }
 924                                 if $node == 1 {
 925                                         push_excess_b_events!(extra_ev.into_iter().chain(events_iter), None);
 926                                 } else if $node == 0 {
 927                                         if let Some(ev) = extra_ev { ab_events.push(ev); }
 928                                         for event in events_iter { ab_events.push(event); }
 929                                 } else {
 930                                         if let Some(ev) = extra_ev { cb_events.push(ev); }
 931                                         for event in events_iter { cb_events.push(event); }
 932                                 }
 933                                 had_events
 934                         } }
 935                 }
 936
 937                 macro_rules! drain_msg_events_on_disconnect {
 938                         ($counterparty_id: expr) => { {
 939                                 if $counterparty_id == 0 {
 940                                         for event in nodes[0].get_and_clear_pending_msg_events() {
 941                                                 match event {
 942                                                         events::MessageSendEvent::UpdateHTLCs { .. } => {},
 943                                                         events::MessageSendEvent::SendRevokeAndACK { .. } => {},
 944                                                         events::MessageSendEvent::SendChannelReestablish { .. } => {},
 945                                                         events::MessageSendEvent::SendChannelReady { .. } => {},
 946                                                         events::MessageSendEvent::SendAnnouncementSignatures { .. } => {},
 947                                                         events::MessageSendEvent::SendChannelUpdate { ref msg, .. } => {
 948                                                                 assert_eq!(msg.contents.flags & 2, 0); // The disable bit must never be set!
 949                                                         },
 950                                                         _ => if out.may_fail.load(atomic::Ordering::Acquire) {
 951                                                                 return;
 952                                                         } else {
 953                                                                 panic!("Unhandled message event")
 954                                                         },
 955                                                 }
 956                                         }
 957                                         push_excess_b_events!(nodes[1].get_and_clear_pending_msg_events().drain(..), Some(0));
 958                                         ab_events.clear();
 959                                         ba_events.clear();
 960                                 } else {
 961                                         for event in nodes[2].get_and_clear_pending_msg_events() {
 962                                                 match event {
 963                                                         events::MessageSendEvent::UpdateHTLCs { .. } => {},
 964                                                         events::MessageSendEvent::SendRevokeAndACK { .. } => {},
 965                                                         events::MessageSendEvent::SendChannelReestablish { .. } => {},
 966                                                         events::MessageSendEvent::SendChannelReady { .. } => {},
 967                                                         events::MessageSendEvent::SendAnnouncementSignatures { .. } => {},
 968                                                         events::MessageSendEvent::SendChannelUpdate { ref msg, .. } => {
 969                                                                 assert_eq!(msg.contents.flags & 2, 0); // The disable bit must never be set!
 970                                                         },
 971                                                         _ => if out.may_fail.load(atomic::Ordering::Acquire) {
 972                                                                 return;
 973                                                         } else {
 974                                                                 panic!("Unhandled message event")
 975                                                         },
 976                                                 }
 977                                         }
 978                                         push_excess_b_events!(nodes[1].get_and_clear_pending_msg_events().drain(..), Some(2));
 979                                         bc_events.clear();
 980                                         cb_events.clear();
 981                                 }
 982                         } }
 983                 }
 984
 985                 macro_rules! process_events {
 986                         ($node: expr, $fail: expr) => { {
 987                                 // In case we get 256 payments we may have a hash collision, resulting in the
 988                                 // second claim/fail call not finding the duplicate-hash HTLC, so we have to
 989                                 // deduplicate the calls here.
 990                                 let mut claim_set = HashSet::new();
 991                                 let mut events = nodes[$node].get_and_clear_pending_events();
 992                                 // Sort events so that PendingHTLCsForwardable get processed last. This avoids a
 993                                 // case where we first process a PendingHTLCsForwardable, then claim/fail on a
 994                                 // PaymentClaimable, claiming/failing two HTLCs, but leaving a just-generated
 995                                 // PaymentClaimable event for the second HTLC in our pending_events (and breaking
 996                                 // our claim_set deduplication).
 997                                 events.sort_by(|a, b| {
 998                                         if let events::Event::PaymentClaimable { .. } = a {
 999                                                 if let events::Event::PendingHTLCsForwardable { .. } = b {
1000                                                         Ordering::Less
1001                                                 } else { Ordering::Equal }
1002                                         } else if let events::Event::PendingHTLCsForwardable { .. } = a {
1003                                                 if let events::Event::PaymentClaimable { .. } = b {
1004                                                         Ordering::Greater
1005                                                 } else { Ordering::Equal }
1006                                         } else { Ordering::Equal }
1007                                 });
1008                                 let had_events = !events.is_empty();
1009                                 for event in events.drain(..) {
1010                                         match event {
1011                                                 events::Event::PaymentClaimable { payment_hash, .. } => {
1012                                                         if claim_set.insert(payment_hash.0) {
1013                                                                 if $fail {
1014                                                                         nodes[$node].fail_htlc_backwards(&payment_hash);
1015                                                                 } else {
1016                                                                         nodes[$node].claim_funds(PaymentPreimage(payment_hash.0));
1017                                                                 }
1018                                                         }
1019                                                 },
1020                                                 events::Event::PaymentSent { .. } => {},
1021                                                 events::Event::PaymentClaimed { .. } => {},
1022                                                 events::Event::PaymentPathSuccessful { .. } => {},
1023                                                 events::Event::PaymentPathFailed { .. } => {},
1024                                                 events::Event::PaymentFailed { .. } => {},
1025                                                 events::Event::ProbeSuccessful { .. } | events::Event::ProbeFailed { .. } => {
1026                                                         // Even though we don't explicitly send probes, because probes are
1027                                                         // detected based on hashing the payment hash+preimage, its rather
1028                                                         // trivial for the fuzzer to build payments that accidentally end up
1029                                                         // looking like probes.
1030                                                 },
1031                                                 events::Event::PaymentForwarded { .. } if $node == 1 => {},
1032                                                 events::Event::ChannelReady { .. } => {},
1033                                                 events::Event::PendingHTLCsForwardable { .. } => {
1034                                                         nodes[$node].process_pending_htlc_forwards();
1035                                                 },
1036                                                 events::Event::HTLCHandlingFailed { .. } => {},
1037                                                 _ => if out.may_fail.load(atomic::Ordering::Acquire) {
1038                                                         return;
1039                                                 } else {
1040                                                         panic!("Unhandled event")
1041                                                 },
1042                                         }
1043                                 }
1044                                 had_events
1045                         } }
1046                 }
1047
1048                 let v = get_slice!(1)[0];
1049                 out.locked_write(format!("READ A BYTE! HANDLING INPUT {:x}...........\n", v).as_bytes());
1050                 match v {
1051                         // In general, we keep related message groups close together in binary form, allowing
1052                         // bit-twiddling mutations to have similar effects. This is probably overkill, but no
1053                         // harm in doing so.
1054
1055                         0x00 => *monitor_a.persister.update_ret.lock().unwrap() = ChannelMonitorUpdateStatus::InProgress,
1056                         0x01 => *monitor_b.persister.update_ret.lock().unwrap() = ChannelMonitorUpdateStatus::InProgress,
1057                         0x02 => *monitor_c.persister.update_ret.lock().unwrap() = ChannelMonitorUpdateStatus::InProgress,
1058                         0x04 => *monitor_a.persister.update_ret.lock().unwrap() = ChannelMonitorUpdateStatus::Completed,
1059                         0x05 => *monitor_b.persister.update_ret.lock().unwrap() = ChannelMonitorUpdateStatus::Completed,
1060                         0x06 => *monitor_c.persister.update_ret.lock().unwrap() = ChannelMonitorUpdateStatus::Completed,
1061
1062                         0x08 => {
1063                                 if let Some((id, _)) = monitor_a.latest_monitors.lock().unwrap().get(&chan_1_funding) {
1064                                         monitor_a.chain_monitor.force_channel_monitor_updated(chan_1_funding, *id);
1065                                         nodes[0].process_monitor_events();
1066                                 }
1067                         },
1068                         0x09 => {
1069                                 if let Some((id, _)) = monitor_b.latest_monitors.lock().unwrap().get(&chan_1_funding) {
1070                                         monitor_b.chain_monitor.force_channel_monitor_updated(chan_1_funding, *id);
1071                                         nodes[1].process_monitor_events();
1072                                 }
1073                         },
1074                         0x0a => {
1075                                 if let Some((id, _)) = monitor_b.latest_monitors.lock().unwrap().get(&chan_2_funding) {
1076                                         monitor_b.chain_monitor.force_channel_monitor_updated(chan_2_funding, *id);
1077                                         nodes[1].process_monitor_events();
1078                                 }
1079                         },
1080                         0x0b => {
1081                                 if let Some((id, _)) = monitor_c.latest_monitors.lock().unwrap().get(&chan_2_funding) {
1082                                         monitor_c.chain_monitor.force_channel_monitor_updated(chan_2_funding, *id);
1083                                         nodes[2].process_monitor_events();
1084                                 }
1085                         },
1086
1087                         0x0c => {
1088                                 if !chan_a_disconnected {
1089                                         nodes[0].peer_disconnected(&nodes[1].get_our_node_id());
1090                                         nodes[1].peer_disconnected(&nodes[0].get_our_node_id());
1091                                         chan_a_disconnected = true;
1092                                         drain_msg_events_on_disconnect!(0);
1093                                 }
1094                         },
1095                         0x0d => {
1096                                 if !chan_b_disconnected {
1097                                         nodes[1].peer_disconnected(&nodes[2].get_our_node_id());
1098                                         nodes[2].peer_disconnected(&nodes[1].get_our_node_id());
1099                                         chan_b_disconnected = true;
1100                                         drain_msg_events_on_disconnect!(2);
1101                                 }
1102                         },
1103                         0x0e => {
1104                                 if chan_a_disconnected {
1105                                         nodes[0].peer_connected(&nodes[1].get_our_node_id(), &Init {
1106                                                 features: nodes[1].init_features(), networks: None, remote_network_address: None
1107                                         }, true).unwrap();
1108                                         nodes[1].peer_connected(&nodes[0].get_our_node_id(), &Init {
1109                                                 features: nodes[0].init_features(), networks: None, remote_network_address: None
1110                                         }, false).unwrap();
1111                                         chan_a_disconnected = false;
1112                                 }
1113                         },
1114                         0x0f => {
1115                                 if chan_b_disconnected {
1116                                         nodes[1].peer_connected(&nodes[2].get_our_node_id(), &Init {
1117                                                 features: nodes[2].init_features(), networks: None, remote_network_address: None
1118                                         }, true).unwrap();
1119                                         nodes[2].peer_connected(&nodes[1].get_our_node_id(), &Init {
1120                                                 features: nodes[1].init_features(), networks: None, remote_network_address: None
1121                                         }, false).unwrap();
1122                                         chan_b_disconnected = false;
1123                                 }
1124                         },
1125
1126                         0x10 => { process_msg_events!(0, true, ProcessMessages::AllMessages); },
1127                         0x11 => { process_msg_events!(0, false, ProcessMessages::AllMessages); },
1128                         0x12 => { process_msg_events!(0, true, ProcessMessages::OneMessage); },
1129                         0x13 => { process_msg_events!(0, false, ProcessMessages::OneMessage); },
1130                         0x14 => { process_msg_events!(0, true, ProcessMessages::OnePendingMessage); },
1131                         0x15 => { process_msg_events!(0, false, ProcessMessages::OnePendingMessage); },
1132
1133                         0x16 => { process_events!(0, true); },
1134                         0x17 => { process_events!(0, false); },
1135
1136                         0x18 => { process_msg_events!(1, true, ProcessMessages::AllMessages); },
1137                         0x19 => { process_msg_events!(1, false, ProcessMessages::AllMessages); },
1138                         0x1a => { process_msg_events!(1, true, ProcessMessages::OneMessage); },
1139                         0x1b => { process_msg_events!(1, false, ProcessMessages::OneMessage); },
1140                         0x1c => { process_msg_events!(1, true, ProcessMessages::OnePendingMessage); },
1141                         0x1d => { process_msg_events!(1, false, ProcessMessages::OnePendingMessage); },
1142
1143                         0x1e => { process_events!(1, true); },
1144                         0x1f => { process_events!(1, false); },
1145
1146                         0x20 => { process_msg_events!(2, true, ProcessMessages::AllMessages); },
1147                         0x21 => { process_msg_events!(2, false, ProcessMessages::AllMessages); },
1148                         0x22 => { process_msg_events!(2, true, ProcessMessages::OneMessage); },
1149                         0x23 => { process_msg_events!(2, false, ProcessMessages::OneMessage); },
1150                         0x24 => { process_msg_events!(2, true, ProcessMessages::OnePendingMessage); },
1151                         0x25 => { process_msg_events!(2, false, ProcessMessages::OnePendingMessage); },
1152
1153                         0x26 => { process_events!(2, true); },
1154                         0x27 => { process_events!(2, false); },
1155
1156                         0x2c => {
1157                                 if !chan_a_disconnected {
1158                                         nodes[1].peer_disconnected(&nodes[0].get_our_node_id());
1159                                         chan_a_disconnected = true;
1160                                         push_excess_b_events!(nodes[1].get_and_clear_pending_msg_events().drain(..), Some(0));
1161                                         ab_events.clear();
1162                                         ba_events.clear();
1163                                 }
1164                                 let (new_node_a, new_monitor_a) = reload_node!(node_a_ser, 0, monitor_a, keys_manager_a, fee_est_a);
1165                                 nodes[0] = new_node_a;
1166                                 monitor_a = new_monitor_a;
1167                         },
1168                         0x2d => {
1169                                 if !chan_a_disconnected {
1170                                         nodes[0].peer_disconnected(&nodes[1].get_our_node_id());
1171                                         chan_a_disconnected = true;
1172                                         nodes[0].get_and_clear_pending_msg_events();
1173                                         ab_events.clear();
1174                                         ba_events.clear();
1175                                 }
1176                                 if !chan_b_disconnected {
1177                                         nodes[2].peer_disconnected(&nodes[1].get_our_node_id());
1178                                         chan_b_disconnected = true;
1179                                         nodes[2].get_and_clear_pending_msg_events();
1180                                         bc_events.clear();
1181                                         cb_events.clear();
1182                                 }
1183                                 let (new_node_b, new_monitor_b) = reload_node!(node_b_ser, 1, monitor_b, keys_manager_b, fee_est_b);
1184                                 nodes[1] = new_node_b;
1185                                 monitor_b = new_monitor_b;
1186                         },
1187                         0x2e => {
1188                                 if !chan_b_disconnected {
1189                                         nodes[1].peer_disconnected(&nodes[2].get_our_node_id());
1190                                         chan_b_disconnected = true;
1191                                         push_excess_b_events!(nodes[1].get_and_clear_pending_msg_events().drain(..), Some(2));
1192                                         bc_events.clear();
1193                                         cb_events.clear();
1194                                 }
1195                                 let (new_node_c, new_monitor_c) = reload_node!(node_c_ser, 2, monitor_c, keys_manager_c, fee_est_c);
1196                                 nodes[2] = new_node_c;
1197                                 monitor_c = new_monitor_c;
1198                         },
1199
1200                         // 1/10th the channel size:
1201                         0x30 => { send_payment(&nodes[0], &nodes[1], chan_a, 10_000_000, &mut payment_id, &mut payment_idx); },
1202                         0x31 => { send_payment(&nodes[1], &nodes[0], chan_a, 10_000_000, &mut payment_id, &mut payment_idx); },
1203                         0x32 => { send_payment(&nodes[1], &nodes[2], chan_b, 10_000_000, &mut payment_id, &mut payment_idx); },
1204                         0x33 => { send_payment(&nodes[2], &nodes[1], chan_b, 10_000_000, &mut payment_id, &mut payment_idx); },
1205                         0x34 => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 10_000_000, &mut payment_id, &mut payment_idx); },
1206                         0x35 => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 10_000_000, &mut payment_id, &mut payment_idx); },
1207
1208                         0x38 => { send_payment(&nodes[0], &nodes[1], chan_a, 1_000_000, &mut payment_id, &mut payment_idx); },
1209                         0x39 => { send_payment(&nodes[1], &nodes[0], chan_a, 1_000_000, &mut payment_id, &mut payment_idx); },
1210                         0x3a => { send_payment(&nodes[1], &nodes[2], chan_b, 1_000_000, &mut payment_id, &mut payment_idx); },
1211                         0x3b => { send_payment(&nodes[2], &nodes[1], chan_b, 1_000_000, &mut payment_id, &mut payment_idx); },
1212                         0x3c => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 1_000_000, &mut payment_id, &mut payment_idx); },
1213                         0x3d => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 1_000_000, &mut payment_id, &mut payment_idx); },
1214
1215                         0x40 => { send_payment(&nodes[0], &nodes[1], chan_a, 100_000, &mut payment_id, &mut payment_idx); },
1216                         0x41 => { send_payment(&nodes[1], &nodes[0], chan_a, 100_000, &mut payment_id, &mut payment_idx); },
1217                         0x42 => { send_payment(&nodes[1], &nodes[2], chan_b, 100_000, &mut payment_id, &mut payment_idx); },
1218                         0x43 => { send_payment(&nodes[2], &nodes[1], chan_b, 100_000, &mut payment_id, &mut payment_idx); },
1219                         0x44 => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 100_000, &mut payment_id, &mut payment_idx); },
1220                         0x45 => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 100_000, &mut payment_id, &mut payment_idx); },
1221
1222                         0x48 => { send_payment(&nodes[0], &nodes[1], chan_a, 10_000, &mut payment_id, &mut payment_idx); },
1223                         0x49 => { send_payment(&nodes[1], &nodes[0], chan_a, 10_000, &mut payment_id, &mut payment_idx); },
1224                         0x4a => { send_payment(&nodes[1], &nodes[2], chan_b, 10_000, &mut payment_id, &mut payment_idx); },
1225                         0x4b => { send_payment(&nodes[2], &nodes[1], chan_b, 10_000, &mut payment_id, &mut payment_idx); },
1226                         0x4c => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 10_000, &mut payment_id, &mut payment_idx); },
1227                         0x4d => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 10_000, &mut payment_id, &mut payment_idx); },
1228
1229                         0x50 => { send_payment(&nodes[0], &nodes[1], chan_a, 1_000, &mut payment_id, &mut payment_idx); },
1230                         0x51 => { send_payment(&nodes[1], &nodes[0], chan_a, 1_000, &mut payment_id, &mut payment_idx); },
1231                         0x52 => { send_payment(&nodes[1], &nodes[2], chan_b, 1_000, &mut payment_id, &mut payment_idx); },
1232                         0x53 => { send_payment(&nodes[2], &nodes[1], chan_b, 1_000, &mut payment_id, &mut payment_idx); },
1233                         0x54 => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 1_000, &mut payment_id, &mut payment_idx); },
1234                         0x55 => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 1_000, &mut payment_id, &mut payment_idx); },
1235
1236                         0x58 => { send_payment(&nodes[0], &nodes[1], chan_a, 100, &mut payment_id, &mut payment_idx); },
1237                         0x59 => { send_payment(&nodes[1], &nodes[0], chan_a, 100, &mut payment_id, &mut payment_idx); },
1238                         0x5a => { send_payment(&nodes[1], &nodes[2], chan_b, 100, &mut payment_id, &mut payment_idx); },
1239                         0x5b => { send_payment(&nodes[2], &nodes[1], chan_b, 100, &mut payment_id, &mut payment_idx); },
1240                         0x5c => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 100, &mut payment_id, &mut payment_idx); },
1241                         0x5d => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 100, &mut payment_id, &mut payment_idx); },
1242
1243                         0x60 => { send_payment(&nodes[0], &nodes[1], chan_a, 10, &mut payment_id, &mut payment_idx); },
1244                         0x61 => { send_payment(&nodes[1], &nodes[0], chan_a, 10, &mut payment_id, &mut payment_idx); },
1245                         0x62 => { send_payment(&nodes[1], &nodes[2], chan_b, 10, &mut payment_id, &mut payment_idx); },
1246                         0x63 => { send_payment(&nodes[2], &nodes[1], chan_b, 10, &mut payment_id, &mut payment_idx); },
1247                         0x64 => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 10, &mut payment_id, &mut payment_idx); },
1248                         0x65 => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 10, &mut payment_id, &mut payment_idx); },
1249
1250                         0x68 => { send_payment(&nodes[0], &nodes[1], chan_a, 1, &mut payment_id, &mut payment_idx); },
1251                         0x69 => { send_payment(&nodes[1], &nodes[0], chan_a, 1, &mut payment_id, &mut payment_idx); },
1252                         0x6a => { send_payment(&nodes[1], &nodes[2], chan_b, 1, &mut payment_id, &mut payment_idx); },
1253                         0x6b => { send_payment(&nodes[2], &nodes[1], chan_b, 1, &mut payment_id, &mut payment_idx); },
1254                         0x6c => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 1, &mut payment_id, &mut payment_idx); },
1255                         0x6d => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 1, &mut payment_id, &mut payment_idx); },
1256
1257                         0x80 => {
1258                                 let mut max_feerate = last_htlc_clear_fee_a;
1259                                 if !anchors {
1260                                         max_feerate *= FEE_SPIKE_BUFFER_FEE_INCREASE_MULTIPLE as u32;
1261                                 }
1262                                 if fee_est_a.ret_val.fetch_add(250, atomic::Ordering::AcqRel) + 250 > max_feerate {
1263                                         fee_est_a.ret_val.store(max_feerate, atomic::Ordering::Release);
1264                                 }
1265                                 nodes[0].maybe_update_chan_fees();
1266                         },
1267                         0x81 => { fee_est_a.ret_val.store(253, atomic::Ordering::Release); nodes[0].maybe_update_chan_fees(); },
1268
1269                         0x84 => {
1270                                 let mut max_feerate = last_htlc_clear_fee_b;
1271                                 if !anchors {
1272                                         max_feerate *= FEE_SPIKE_BUFFER_FEE_INCREASE_MULTIPLE as u32;
1273                                 }
1274                                 if fee_est_b.ret_val.fetch_add(250, atomic::Ordering::AcqRel) + 250 > max_feerate {
1275                                         fee_est_b.ret_val.store(max_feerate, atomic::Ordering::Release);
1276                                 }
1277                                 nodes[1].maybe_update_chan_fees();
1278                         },
1279                         0x85 => { fee_est_b.ret_val.store(253, atomic::Ordering::Release); nodes[1].maybe_update_chan_fees(); },
1280
1281                         0x88 => {
1282                                 let mut max_feerate = last_htlc_clear_fee_c;
1283                                 if !anchors {
1284                                         max_feerate *= FEE_SPIKE_BUFFER_FEE_INCREASE_MULTIPLE as u32;
1285                                 }
1286                                 if fee_est_c.ret_val.fetch_add(250, atomic::Ordering::AcqRel) + 250 > max_feerate {
1287                                         fee_est_c.ret_val.store(max_feerate, atomic::Ordering::Release);
1288                                 }
1289                                 nodes[2].maybe_update_chan_fees();
1290                         },
1291                         0x89 => { fee_est_c.ret_val.store(253, atomic::Ordering::Release); nodes[2].maybe_update_chan_fees(); },
1292
1293                         0xf0 => {
1294                                 let pending_updates = monitor_a.chain_monitor.list_pending_monitor_updates().remove(&chan_1_funding).unwrap();
1295                                 if let Some(id) = pending_updates.get(0) {
1296                                         monitor_a.chain_monitor.channel_monitor_updated(chan_1_funding, *id).unwrap();
1297                                 }
1298                                 nodes[0].process_monitor_events();
1299                         }
1300                         0xf1 => {
1301                                 let pending_updates = monitor_a.chain_monitor.list_pending_monitor_updates().remove(&chan_1_funding).unwrap();
1302                                 if let Some(id) = pending_updates.get(1) {
1303                                         monitor_a.chain_monitor.channel_monitor_updated(chan_1_funding, *id).unwrap();
1304                                 }
1305                                 nodes[0].process_monitor_events();
1306                         }
1307                         0xf2 => {
1308                                 let pending_updates = monitor_a.chain_monitor.list_pending_monitor_updates().remove(&chan_1_funding).unwrap();
1309                                 if let Some(id) = pending_updates.last() {
1310                                         monitor_a.chain_monitor.channel_monitor_updated(chan_1_funding, *id).unwrap();
1311                                 }
1312                                 nodes[0].process_monitor_events();
1313                         }
1314
1315                         0xf4 => {
1316                                 let pending_updates = monitor_b.chain_monitor.list_pending_monitor_updates().remove(&chan_1_funding).unwrap();
1317                                 if let Some(id) = pending_updates.get(0) {
1318                                         monitor_b.chain_monitor.channel_monitor_updated(chan_1_funding, *id).unwrap();
1319                                 }
1320                                 nodes[1].process_monitor_events();
1321                         }
1322                         0xf5 => {
1323                                 let pending_updates = monitor_b.chain_monitor.list_pending_monitor_updates().remove(&chan_1_funding).unwrap();
1324                                 if let Some(id) = pending_updates.get(1) {
1325                                         monitor_b.chain_monitor.channel_monitor_updated(chan_1_funding, *id).unwrap();
1326                                 }
1327                                 nodes[1].process_monitor_events();
1328                         }
1329                         0xf6 => {
1330                                 let pending_updates = monitor_b.chain_monitor.list_pending_monitor_updates().remove(&chan_1_funding).unwrap();
1331                                 if let Some(id) = pending_updates.last() {
1332                                         monitor_b.chain_monitor.channel_monitor_updated(chan_1_funding, *id).unwrap();
1333                                 }
1334                                 nodes[1].process_monitor_events();
1335                         }
1336
1337                         0xf8 => {
1338                                 let pending_updates = monitor_b.chain_monitor.list_pending_monitor_updates().remove(&chan_2_funding).unwrap();
1339                                 if let Some(id) = pending_updates.get(0) {
1340                                         monitor_b.chain_monitor.channel_monitor_updated(chan_2_funding, *id).unwrap();
1341                                 }
1342                                 nodes[1].process_monitor_events();
1343                         }
1344                         0xf9 => {
1345                                 let pending_updates = monitor_b.chain_monitor.list_pending_monitor_updates().remove(&chan_2_funding).unwrap();
1346                                 if let Some(id) = pending_updates.get(1) {
1347                                         monitor_b.chain_monitor.channel_monitor_updated(chan_2_funding, *id).unwrap();
1348                                 }
1349                                 nodes[1].process_monitor_events();
1350                         }
1351                         0xfa => {
1352                                 let pending_updates = monitor_b.chain_monitor.list_pending_monitor_updates().remove(&chan_2_funding).unwrap();
1353                                 if let Some(id) = pending_updates.last() {
1354                                         monitor_b.chain_monitor.channel_monitor_updated(chan_2_funding, *id).unwrap();
1355                                 }
1356                                 nodes[1].process_monitor_events();
1357                         }
1358
1359                         0xfc => {
1360                                 let pending_updates = monitor_c.chain_monitor.list_pending_monitor_updates().remove(&chan_2_funding).unwrap();
1361                                 if let Some(id) = pending_updates.get(0) {
1362                                         monitor_c.chain_monitor.channel_monitor_updated(chan_2_funding, *id).unwrap();
1363                                 }
1364                                 nodes[2].process_monitor_events();
1365                         }
1366                         0xfd => {
1367                                 let pending_updates = monitor_c.chain_monitor.list_pending_monitor_updates().remove(&chan_2_funding).unwrap();
1368                                 if let Some(id) = pending_updates.get(1) {
1369                                         monitor_c.chain_monitor.channel_monitor_updated(chan_2_funding, *id).unwrap();
1370                                 }
1371                                 nodes[2].process_monitor_events();
1372                         }
1373                         0xfe => {
1374                                 let pending_updates = monitor_c.chain_monitor.list_pending_monitor_updates().remove(&chan_2_funding).unwrap();
1375                                 if let Some(id) = pending_updates.last() {
1376                                         monitor_c.chain_monitor.channel_monitor_updated(chan_2_funding, *id).unwrap();
1377                                 }
1378                                 nodes[2].process_monitor_events();
1379                         }
1380
1381                         0xff => {
1382                                 // Test that no channel is in a stuck state where neither party can send funds even
1383                                 // after we resolve all pending events.
1384                                 // First make sure there are no pending monitor updates, resetting the error state
1385                                 // and calling force_channel_monitor_updated for each monitor.
1386                                 *monitor_a.persister.update_ret.lock().unwrap() = ChannelMonitorUpdateStatus::Completed;
1387                                 *monitor_b.persister.update_ret.lock().unwrap() = ChannelMonitorUpdateStatus::Completed;
1388                                 *monitor_c.persister.update_ret.lock().unwrap() = ChannelMonitorUpdateStatus::Completed;
1389
1390                                 if let Some((id, _)) = monitor_a.latest_monitors.lock().unwrap().get(&chan_1_funding) {
1391                                         monitor_a.chain_monitor.force_channel_monitor_updated(chan_1_funding, *id);
1392                                         nodes[0].process_monitor_events();
1393                                 }
1394                                 if let Some((id, _)) = monitor_b.latest_monitors.lock().unwrap().get(&chan_1_funding) {
1395                                         monitor_b.chain_monitor.force_channel_monitor_updated(chan_1_funding, *id);
1396                                         nodes[1].process_monitor_events();
1397                                 }
1398                                 if let Some((id, _)) = monitor_b.latest_monitors.lock().unwrap().get(&chan_2_funding) {
1399                                         monitor_b.chain_monitor.force_channel_monitor_updated(chan_2_funding, *id);
1400                                         nodes[1].process_monitor_events();
1401                                 }
1402                                 if let Some((id, _)) = monitor_c.latest_monitors.lock().unwrap().get(&chan_2_funding) {
1403                                         monitor_c.chain_monitor.force_channel_monitor_updated(chan_2_funding, *id);
1404                                         nodes[2].process_monitor_events();
1405                                 }
1406
1407                                 // Next, make sure peers are all connected to each other
1408                                 if chan_a_disconnected {
1409                                         nodes[0].peer_connected(&nodes[1].get_our_node_id(), &Init {
1410                                                 features: nodes[1].init_features(), networks: None, remote_network_address: None
1411                                         }, true).unwrap();
1412                                         nodes[1].peer_connected(&nodes[0].get_our_node_id(), &Init {
1413                                                 features: nodes[0].init_features(), networks: None, remote_network_address: None
1414                                         }, false).unwrap();
1415                                         chan_a_disconnected = false;
1416                                 }
1417                                 if chan_b_disconnected {
1418                                         nodes[1].peer_connected(&nodes[2].get_our_node_id(), &Init {
1419                                                 features: nodes[2].init_features(), networks: None, remote_network_address: None
1420                                         }, true).unwrap();
1421                                         nodes[2].peer_connected(&nodes[1].get_our_node_id(), &Init {
1422                                                 features: nodes[1].init_features(), networks: None, remote_network_address: None
1423                                         }, false).unwrap();
1424                                         chan_b_disconnected = false;
1425                                 }
1426
1427                                 for i in 0..std::usize::MAX {
1428                                         if i == 100 { panic!("It may take may iterations to settle the state, but it should not take forever"); }
1429                                         // Then, make sure any current forwards make their way to their destination
1430                                         if process_msg_events!(0, false, ProcessMessages::AllMessages) { continue; }
1431                                         if process_msg_events!(1, false, ProcessMessages::AllMessages) { continue; }
1432                                         if process_msg_events!(2, false, ProcessMessages::AllMessages) { continue; }
1433                                         // ...making sure any pending PendingHTLCsForwardable events are handled and
1434                                         // payments claimed.
1435                                         if process_events!(0, false) { continue; }
1436                                         if process_events!(1, false) { continue; }
1437                                         if process_events!(2, false) { continue; }
1438                                         break;
1439                                 }
1440
1441                                 // Finally, make sure that at least one end of each channel can make a substantial payment
1442                                 assert!(
1443                                         send_payment(&nodes[0], &nodes[1], chan_a, 10_000_000, &mut payment_id, &mut payment_idx) ||
1444                                         send_payment(&nodes[1], &nodes[0], chan_a, 10_000_000, &mut payment_id, &mut payment_idx));
1445                                 assert!(
1446                                         send_payment(&nodes[1], &nodes[2], chan_b, 10_000_000, &mut payment_id, &mut payment_idx) ||
1447                                         send_payment(&nodes[2], &nodes[1], chan_b, 10_000_000, &mut payment_id, &mut payment_idx));
1448
1449                                 last_htlc_clear_fee_a = fee_est_a.ret_val.load(atomic::Ordering::Acquire);
1450                                 last_htlc_clear_fee_b = fee_est_b.ret_val.load(atomic::Ordering::Acquire);
1451                                 last_htlc_clear_fee_c = fee_est_c.ret_val.load(atomic::Ordering::Acquire);
1452                         },
1453                         _ => test_return!(),
1454                 }
1455
1456                 if nodes[0].get_and_clear_needs_persistence() == true {
1457                         node_a_ser.0.clear();
1458                         nodes[0].write(&mut node_a_ser).unwrap();
1459                 }
1460                 if nodes[1].get_and_clear_needs_persistence() == true {
1461                         node_b_ser.0.clear();
1462                         nodes[1].write(&mut node_b_ser).unwrap();
1463                 }
1464                 if nodes[2].get_and_clear_needs_persistence() == true {
1465                         node_c_ser.0.clear();
1466                         nodes[2].write(&mut node_c_ser).unwrap();
1467                 }
1468         }
1469 }
1470
1471 /// We actually have different behavior based on if a certain log string has been seen, so we have
1472 /// to do a bit more tracking.
1473 #[derive(Clone)]
1474 struct SearchingOutput<O: Output> {
1475         output: O,
1476         may_fail: Arc<atomic::AtomicBool>,
1477 }
1478 impl<O: Output> Output for SearchingOutput<O> {
1479         fn locked_write(&self, data: &[u8]) {
1480                 // We hit a design limitation of LN state machine (see CONCURRENT_INBOUND_HTLC_FEE_BUFFER)
1481                 if std::str::from_utf8(data).unwrap().contains("Outbound update_fee HTLC buffer overflow - counterparty should force-close this channel") {
1482                         self.may_fail.store(true, atomic::Ordering::Release);
1483                 }
1484                 self.output.locked_write(data)
1485         }
1486 }
1487 impl<O: Output> SearchingOutput<O> {
1488         pub fn new(output: O) -> Self {
1489                 Self { output, may_fail: Arc::new(atomic::AtomicBool::new(false)) }
1490         }
1491 }
1492
1493 pub fn chanmon_consistency_test<Out: Output>(data: &[u8], out: Out) {
1494         do_test(data, out.clone(), false);
1495         do_test(data, out, true);
1496 }
1497
1498 #[no_mangle]
1499 pub extern "C" fn chanmon_consistency_run(data: *const u8, datalen: usize) {
1500         do_test(unsafe { std::slice::from_raw_parts(data, datalen) }, test_logger::DevNull{}, false);
1501         do_test(unsafe { std::slice::from_raw_parts(data, datalen) }, test_logger::DevNull{}, true);
1502 }