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