_ 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::amount::Amount;
  22 use bitcoin::blockdata::constants::genesis_block;
  23 use bitcoin::blockdata::transaction::{Transaction, TxOut};
  24 use bitcoin::blockdata::script::{Builder, ScriptBuf};
  25 use bitcoin::blockdata::opcodes;
  26 use bitcoin::blockdata::locktime::absolute::LockTime;
  27 use bitcoin::network::Network;
  28 use bitcoin::transaction::Version;
  29
  30 use bitcoin::WPubkeyHash;
  31 use bitcoin::hashes::Hash as TraitImport;
  32 use bitcoin::hashes::sha256::Hash as Sha256;
  33 use bitcoin::hashes::sha256d::Hash as Sha256dHash;
  34 use bitcoin::hash_types::BlockHash;
  35
  36 use lightning::blinded_path::BlindedPath;
  37 use lightning::blinded_path::message::ForwardNode;
  38 use lightning::blinded_path::payment::ReceiveTlvs;
  39 use lightning::chain;
  40 use lightning::chain::{BestBlock, ChannelMonitorUpdateStatus, chainmonitor, channelmonitor, Confirm, Watch};
  41 use lightning::chain::channelmonitor::{ChannelMonitor, MonitorEvent};
  42 use lightning::chain::transaction::OutPoint;
  43 use lightning::chain::chaininterface::{BroadcasterInterface, ConfirmationTarget, FeeEstimator};
  44 use lightning::sign::{KeyMaterial, InMemorySigner, Recipient, EntropySource, NodeSigner, SignerProvider};
  45 use lightning::events;
  46 use lightning::events::MessageSendEventsProvider;
  47 use lightning::ln::{ChannelId, PaymentHash, PaymentPreimage, PaymentSecret};
  48 use lightning::ln::channel_state::ChannelDetails;
  49 use lightning::ln::channelmanager::{ChainParameters,ChannelManager, PaymentSendFailure, ChannelManagerReadArgs, PaymentId, RecipientOnionFields};
  50 use lightning::ln::channel::FEE_SPIKE_BUFFER_FEE_INCREASE_MULTIPLE;
  51 use lightning::ln::msgs::{self, CommitmentUpdate, ChannelMessageHandler, DecodeError, UpdateAddHTLC, Init};
  52 use lightning::ln::script::ShutdownScript;
  53 use lightning::ln::functional_test_utils::*;
  54 use lightning::offers::invoice::{BlindedPayInfo, UnsignedBolt12Invoice};
  55 use lightning::offers::invoice_request::UnsignedInvoiceRequest;
  56 use lightning::onion_message::messenger::{Destination, MessageRouter, OnionMessagePath};
  57 use lightning::util::test_channel_signer::{TestChannelSigner, EnforcementState};
  58 use lightning::util::errors::APIError;
  59 use lightning::util::hash_tables::*;
  60 use lightning::util::logger::Logger;
  61 use lightning::util::config::UserConfig;
  62 use lightning::util::ser::{Readable, ReadableArgs, Writeable, Writer};
  63 use lightning::routing::router::{InFlightHtlcs, Path, Route, RouteHop, RouteParameters, Router};
  64
  65 use crate::utils::test_logger::{self, Output};
  66 use crate::utils::test_persister::TestPersister;
  67
  68 use bitcoin::secp256k1::{Message, PublicKey, SecretKey, Scalar, Secp256k1, self};
  69 use bitcoin::secp256k1::ecdh::SharedSecret;
  70 use bitcoin::secp256k1::ecdsa::{RecoverableSignature, Signature};
  71 use bitcoin::secp256k1::schnorr;
  72
  73 use std::mem;
  74 use std::cmp::{self, Ordering};
  75 use std::sync::{Arc,Mutex};
  76 use std::sync::atomic;
  77 use std::io::Cursor;
  78 use bech32::u5;
  79
  80 const MAX_FEE: u32 = 10_000;
  81 struct FuzzEstimator {
  82         ret_val: atomic::AtomicU32,
  83 }
  84 impl FeeEstimator for FuzzEstimator {
  85         fn get_est_sat_per_1000_weight(&self, conf_target: ConfirmationTarget) -> u32 {
  86                 // We force-close channels if our counterparty sends us a feerate which is a small multiple
  87                 // of our HighPriority fee estimate or smaller than our Background fee estimate. Thus, we
  88                 // always return a HighPriority feerate here which is >= the maximum Normal feerate and a
  89                 // Background feerate which is <= the minimum Normal feerate.
  90                 match conf_target {
  91                         ConfirmationTarget::OnChainSweep => MAX_FEE,
  92                         ConfirmationTarget::ChannelCloseMinimum|ConfirmationTarget::AnchorChannelFee|ConfirmationTarget::MinAllowedAnchorChannelRemoteFee|ConfirmationTarget::MinAllowedNonAnchorChannelRemoteFee|ConfirmationTarget::OutputSpendingFee => 253,
  93                         ConfirmationTarget::NonAnchorChannelFee => cmp::min(self.ret_val.load(atomic::Ordering::Acquire), MAX_FEE),
  94                 }
  95         }
  96 }
  97
  98 struct FuzzRouter {}
  99
 100 impl Router for FuzzRouter {
 101         fn find_route(
 102                 &self, _payer: &PublicKey, _params: &RouteParameters, _first_hops: Option<&[&ChannelDetails]>,
 103                 _inflight_htlcs: InFlightHtlcs
 104         ) -> Result<Route, msgs::LightningError> {
 105                 Err(msgs::LightningError {
 106                         err: String::from("Not implemented"),
 107                         action: msgs::ErrorAction::IgnoreError
 108                 })
 109         }
 110
 111         fn create_blinded_payment_paths<T: secp256k1::Signing + secp256k1::Verification>(
 112                 &self, _recipient: PublicKey, _first_hops: Vec<ChannelDetails>, _tlvs: ReceiveTlvs,
 113                 _amount_msats: u64, _secp_ctx: &Secp256k1<T>,
 114         ) -> Result<Vec<(BlindedPayInfo, BlindedPath)>, ()> {
 115                 unreachable!()
 116         }
 117 }
 118
 119 impl MessageRouter for FuzzRouter {
 120         fn find_path(
 121                 &self, _sender: PublicKey, _peers: Vec<PublicKey>, _destination: Destination
 122         ) -> Result<OnionMessagePath, ()> {
 123                 unreachable!()
 124         }
 125
 126         fn create_blinded_paths<T: secp256k1::Signing + secp256k1::Verification>(
 127                 &self, _recipient: PublicKey, _peers: Vec<ForwardNode>, _secp_ctx: &Secp256k1<T>,
 128         ) -> Result<Vec<BlindedPath>, ()> {
 129                 unreachable!()
 130         }
 131 }
 132
 133 pub struct TestBroadcaster {}
 134 impl BroadcasterInterface for TestBroadcaster {
 135         fn broadcast_transactions(&self, _txs: &[&Transaction]) { }
 136 }
 137
 138 pub struct VecWriter(pub Vec<u8>);
 139 impl Writer for VecWriter {
 140         fn write_all(&mut self, buf: &[u8]) -> Result<(), ::std::io::Error> {
 141                 self.0.extend_from_slice(buf);
 142                 Ok(())
 143         }
 144 }
 145
 146 struct TestChainMonitor {
 147         pub logger: Arc<dyn Logger>,
 148         pub keys: Arc<KeyProvider>,
 149         pub persister: Arc<TestPersister>,
 150         pub chain_monitor: Arc<chainmonitor::ChainMonitor<TestChannelSigner, Arc<dyn chain::Filter>, Arc<TestBroadcaster>, Arc<FuzzEstimator>, Arc<dyn Logger>, Arc<TestPersister>>>,
 151         // If we reload a node with an old copy of ChannelMonitors, the ChannelManager deserialization
 152         // logic will automatically force-close our channels for us (as we don't have an up-to-date
 153         // monitor implying we are not able to punish misbehaving counterparties). Because this test
 154         // "fails" if we ever force-close a channel, we avoid doing so, always saving the latest
 155         // fully-serialized monitor state here, as well as the corresponding update_id.
 156         pub latest_monitors: Mutex<HashMap<OutPoint, (u64, Vec<u8>)>>,
 157 }
 158 impl TestChainMonitor {
 159         pub fn new(broadcaster: Arc<TestBroadcaster>, logger: Arc<dyn Logger>, feeest: Arc<FuzzEstimator>, persister: Arc<TestPersister>, keys: Arc<KeyProvider>) -> Self {
 160                 Self {
 161                         chain_monitor: Arc::new(chainmonitor::ChainMonitor::new(None, broadcaster, logger.clone(), feeest, Arc::clone(&persister))),
 162                         logger,
 163                         keys,
 164                         persister,
 165                         latest_monitors: Mutex::new(new_hash_map()),
 166                 }
 167         }
 168 }
 169 impl chain::Watch<TestChannelSigner> for TestChainMonitor {
 170         fn watch_channel(&self, funding_txo: OutPoint, monitor: channelmonitor::ChannelMonitor<TestChannelSigner>) -> Result<chain::ChannelMonitorUpdateStatus, ()> {
 171                 let mut ser = VecWriter(Vec::new());
 172                 monitor.write(&mut ser).unwrap();
 173                 if let Some(_) = self.latest_monitors.lock().unwrap().insert(funding_txo, (monitor.get_latest_update_id(), ser.0)) {
 174                         panic!("Already had monitor pre-watch_channel");
 175                 }
 176                 self.chain_monitor.watch_channel(funding_txo, monitor)
 177         }
 178
 179         fn update_channel(&self, funding_txo: OutPoint, update: &channelmonitor::ChannelMonitorUpdate) -> chain::ChannelMonitorUpdateStatus {
 180                 let mut map_lock = self.latest_monitors.lock().unwrap();
 181                 let map_entry = map_lock.get_mut(&funding_txo).expect("Didn't have monitor on update call");
 182                 let deserialized_monitor = <(BlockHash, channelmonitor::ChannelMonitor<TestChannelSigner>)>::
 183                         read(&mut Cursor::new(&map_entry.1), (&*self.keys, &*self.keys)).unwrap().1;
 184                 deserialized_monitor.update_monitor(update, &&TestBroadcaster{}, &&FuzzEstimator { ret_val: atomic::AtomicU32::new(253) }, &self.logger).unwrap();
 185                 let mut ser = VecWriter(Vec::new());
 186                 deserialized_monitor.write(&mut ser).unwrap();
 187                 *map_entry = (update.update_id, ser.0);
 188                 self.chain_monitor.update_channel(funding_txo, update)
 189         }
 190
 191         fn release_pending_monitor_events(&self) -> Vec<(OutPoint, ChannelId, Vec<MonitorEvent>, Option<PublicKey>)> {
 192                 return self.chain_monitor.release_pending_monitor_events();
 193         }
 194 }
 195
 196 struct KeyProvider {
 197         node_secret: SecretKey,
 198         rand_bytes_id: atomic::AtomicU32,
 199         enforcement_states: Mutex<HashMap<[u8;32], Arc<Mutex<EnforcementState>>>>,
 200 }
 201
 202 impl EntropySource for KeyProvider {
 203         fn get_secure_random_bytes(&self) -> [u8; 32] {
 204                 let id = self.rand_bytes_id.fetch_add(1, atomic::Ordering::Relaxed);
 205                 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]];
 206                 res[30-4..30].copy_from_slice(&id.to_le_bytes());
 207                 res
 208         }
 209 }
 210
 211 impl NodeSigner for KeyProvider {
 212         fn get_node_id(&self, recipient: Recipient) -> Result<PublicKey, ()> {
 213                 let node_secret = match recipient {
 214                         Recipient::Node => Ok(&self.node_secret),
 215                         Recipient::PhantomNode => Err(())
 216                 }?;
 217                 Ok(PublicKey::from_secret_key(&Secp256k1::signing_only(), node_secret))
 218         }
 219
 220         fn ecdh(&self, recipient: Recipient, other_key: &PublicKey, tweak: Option<&Scalar>) -> Result<SharedSecret, ()> {
 221                 let mut node_secret = match recipient {
 222                         Recipient::Node => Ok(self.node_secret.clone()),
 223                         Recipient::PhantomNode => Err(())
 224                 }?;
 225                 if let Some(tweak) = tweak {
 226                         node_secret = node_secret.mul_tweak(tweak).map_err(|_| ())?;
 227                 }
 228                 Ok(SharedSecret::new(other_key, &node_secret))
 229         }
 230
 231         fn get_inbound_payment_key_material(&self) -> KeyMaterial {
 232                 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]])
 233         }
 234
 235         fn sign_invoice(&self, _hrp_bytes: &[u8], _invoice_data: &[u5], _recipient: Recipient) -> Result<RecoverableSignature, ()> {
 236                 unreachable!()
 237         }
 238
 239         fn sign_bolt12_invoice_request(
 240                 &self, _invoice_request: &UnsignedInvoiceRequest
 241         ) -> Result<schnorr::Signature, ()> {
 242                 unreachable!()
 243         }
 244
 245         fn sign_bolt12_invoice(
 246                 &self, _invoice: &UnsignedBolt12Invoice,
 247         ) -> Result<schnorr::Signature, ()> {
 248                 unreachable!()
 249         }
 250
 251         fn sign_gossip_message(&self, msg: lightning::ln::msgs::UnsignedGossipMessage) -> Result<Signature, ()> {
 252                 let msg_hash = Message::from_digest(Sha256dHash::hash(&msg.encode()[..]).to_byte_array());
 253                 let secp_ctx = Secp256k1::signing_only();
 254                 Ok(secp_ctx.sign_ecdsa(&msg_hash, &self.node_secret))
 255         }
 256 }
 257
 258 impl SignerProvider for KeyProvider {
 259         type EcdsaSigner = TestChannelSigner;
 260         #[cfg(taproot)]
 261         type TaprootSigner = TestChannelSigner;
 262
 263         fn generate_channel_keys_id(&self, _inbound: bool, _channel_value_satoshis: u64, _user_channel_id: u128) -> [u8; 32] {
 264                 let id = self.rand_bytes_id.fetch_add(1, atomic::Ordering::Relaxed) as u8;
 265                 [id; 32]
 266         }
 267
 268         fn derive_channel_signer(&self, channel_value_satoshis: u64, channel_keys_id: [u8; 32]) -> Self::EcdsaSigner {
 269                 let secp_ctx = Secp256k1::signing_only();
 270                 let id = channel_keys_id[0];
 271                 let keys = InMemorySigner::new(
 272                         &secp_ctx,
 273                         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(),
 274                         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(),
 275                         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(),
 276                         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(),
 277                         SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, self.node_secret[31]]).unwrap(),
 278                         [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]],
 279                         channel_value_satoshis,
 280                         channel_keys_id,
 281                         channel_keys_id,
 282                 );
 283                 let revoked_commitment = self.make_enforcement_state_cell(keys.commitment_seed);
 284                 TestChannelSigner::new_with_revoked(keys, revoked_commitment, false)
 285         }
 286
 287         fn read_chan_signer(&self, buffer: &[u8]) -> Result<Self::EcdsaSigner, DecodeError> {
 288                 let mut reader = std::io::Cursor::new(buffer);
 289
 290                 let inner: InMemorySigner = ReadableArgs::read(&mut reader, self)?;
 291                 let state = self.make_enforcement_state_cell(inner.commitment_seed);
 292
 293                 Ok(TestChannelSigner {
 294                         inner,
 295                         state,
 296                         disable_revocation_policy_check: false,
 297                         available: Arc::new(Mutex::new(true)),
 298                 })
 299         }
 300
 301         fn get_destination_script(&self, _channel_keys_id: [u8; 32]) -> Result<ScriptBuf, ()> {
 302                 let secp_ctx = Secp256k1::signing_only();
 303                 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();
 304                 let our_channel_monitor_claim_key_hash = WPubkeyHash::hash(&PublicKey::from_secret_key(&secp_ctx, &channel_monitor_claim_key).serialize());
 305                 Ok(Builder::new().push_opcode(opcodes::all::OP_PUSHBYTES_0).push_slice(our_channel_monitor_claim_key_hash).into_script())
 306         }
 307
 308         fn get_shutdown_scriptpubkey(&self) -> Result<ShutdownScript, ()> {
 309                 let secp_ctx = Secp256k1::signing_only();
 310                 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();
 311                 let pubkey_hash = WPubkeyHash::hash(&PublicKey::from_secret_key(&secp_ctx, &secret_key).serialize());
 312                 Ok(ShutdownScript::new_p2wpkh(&pubkey_hash))
 313         }
 314 }
 315
 316 impl KeyProvider {
 317         fn make_enforcement_state_cell(&self, commitment_seed: [u8; 32]) -> Arc<Mutex<EnforcementState>> {
 318                 let mut revoked_commitments = self.enforcement_states.lock().unwrap();
 319                 if !revoked_commitments.contains_key(&commitment_seed) {
 320                         revoked_commitments.insert(commitment_seed, Arc::new(Mutex::new(EnforcementState::new())));
 321                 }
 322                 let cell = revoked_commitments.get(&commitment_seed).unwrap();
 323                 Arc::clone(cell)
 324         }
 325 }
 326
 327 #[inline]
 328 fn check_api_err(api_err: APIError, sendable_bounds_violated: bool) {
 329         match api_err {
 330                 APIError::APIMisuseError { .. } => panic!("We can't misuse the API"),
 331                 APIError::FeeRateTooHigh { .. } => panic!("We can't send too much fee?"),
 332                 APIError::InvalidRoute { .. } => panic!("Our routes should work"),
 333                 APIError::ChannelUnavailable { err } => {
 334                         // Test the error against a list of errors we can hit, and reject
 335                         // all others. If you hit this panic, the list of acceptable errors
 336                         // is probably just stale and you should add new messages here.
 337                         match err.as_str() {
 338                                 "Peer for first hop currently disconnected" => {},
 339                                 _ if err.starts_with("Cannot send less than our next-HTLC minimum - ") => {},
 340                                 _ if err.starts_with("Cannot send more than our next-HTLC maximum - ") => {},
 341                                 _ => panic!("{}", err),
 342                         }
 343                         assert!(sendable_bounds_violated);
 344                 },
 345                 APIError::MonitorUpdateInProgress => {
 346                         // We can (obviously) temp-fail a monitor update
 347                 },
 348                 APIError::IncompatibleShutdownScript { .. } => panic!("Cannot send an incompatible shutdown script"),
 349         }
 350 }
 351 #[inline]
 352 fn check_payment_err(send_err: PaymentSendFailure, sendable_bounds_violated: bool) {
 353         match send_err {
 354                 PaymentSendFailure::ParameterError(api_err) => check_api_err(api_err, sendable_bounds_violated),
 355                 PaymentSendFailure::PathParameterError(per_path_results) => {
 356                         for res in per_path_results { if let Err(api_err) = res { check_api_err(api_err, sendable_bounds_violated); } }
 357                 },
 358                 PaymentSendFailure::AllFailedResendSafe(per_path_results) => {
 359                         for api_err in per_path_results { check_api_err(api_err, sendable_bounds_violated); }
 360                 },
 361                 PaymentSendFailure::PartialFailure { results, .. } => {
 362                         for res in results { if let Err(api_err) = res { check_api_err(api_err, sendable_bounds_violated); } }
 363                 },
 364                 PaymentSendFailure::DuplicatePayment => panic!(),
 365         }
 366 }
 367
 368 type ChanMan<'a> = ChannelManager<Arc<TestChainMonitor>, Arc<TestBroadcaster>, Arc<KeyProvider>, Arc<KeyProvider>, Arc<KeyProvider>, Arc<FuzzEstimator>, &'a FuzzRouter, Arc<dyn Logger>>;
 369
 370 #[inline]
 371 fn get_payment_secret_hash(dest: &ChanMan, payment_id: &mut u8) -> Option<(PaymentSecret, PaymentHash)> {
 372         let mut payment_hash;
 373         for _ in 0..256 {
 374                 payment_hash = PaymentHash(Sha256::hash(&[*payment_id; 1]).to_byte_array());
 375                 if let Ok(payment_secret) = dest.create_inbound_payment_for_hash(payment_hash, None, 3600, None) {
 376                         return Some((payment_secret, payment_hash));
 377                 }
 378                 *payment_id = payment_id.wrapping_add(1);
 379         }
 380         None
 381 }
 382
 383 #[inline]
 384 fn send_payment(source: &ChanMan, dest: &ChanMan, dest_chan_id: u64, amt: u64, payment_id: &mut u8, payment_idx: &mut u64) -> bool {
 385         let (payment_secret, payment_hash) =
 386                 if let Some((secret, hash)) = get_payment_secret_hash(dest, payment_id) { (secret, hash) } else { return true; };
 387         let mut payment_id = [0; 32];
 388         payment_id[0..8].copy_from_slice(&payment_idx.to_ne_bytes());
 389         *payment_idx += 1;
 390         let (min_value_sendable, max_value_sendable) = source.list_usable_channels()
 391                 .iter().find(|chan| chan.short_channel_id == Some(dest_chan_id))
 392                 .map(|chan|
 393                         (chan.next_outbound_htlc_minimum_msat, chan.next_outbound_htlc_limit_msat))
 394                 .unwrap_or((0, 0));
 395         if let Err(err) = source.send_payment_with_route(&Route {
 396                 paths: vec![Path { hops: vec![RouteHop {
 397                         pubkey: dest.get_our_node_id(),
 398                         node_features: dest.node_features(),
 399                         short_channel_id: dest_chan_id,
 400                         channel_features: dest.channel_features(),
 401                         fee_msat: amt,
 402                         cltv_expiry_delta: 200,
 403                         maybe_announced_channel: true,
 404                 }], blinded_tail: None }],
 405                 route_params: None,
 406         }, payment_hash, RecipientOnionFields::secret_only(payment_secret), PaymentId(payment_id)) {
 407                 check_payment_err(err, amt > max_value_sendable || amt < min_value_sendable);
 408                 false
 409         } else {
 410                 // Note that while the max is a strict upper-bound, we can occasionally send substantially
 411                 // below the minimum, with some gap which is unusable immediately below the minimum. Thus,
 412                 // we don't check against min_value_sendable here.
 413                 assert!(amt <= max_value_sendable);
 414                 true
 415         }
 416 }
 417 #[inline]
 418 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 {
 419         let (payment_secret, payment_hash) =
 420                 if let Some((secret, hash)) = get_payment_secret_hash(dest, payment_id) { (secret, hash) } else { return true; };
 421         let mut payment_id = [0; 32];
 422         payment_id[0..8].copy_from_slice(&payment_idx.to_ne_bytes());
 423         *payment_idx += 1;
 424         let (min_value_sendable, max_value_sendable) = source.list_usable_channels()
 425                 .iter().find(|chan| chan.short_channel_id == Some(middle_chan_id))
 426                 .map(|chan|
 427                         (chan.next_outbound_htlc_minimum_msat, chan.next_outbound_htlc_limit_msat))
 428                 .unwrap_or((0, 0));
 429         let first_hop_fee = 50_000;
 430         if let Err(err) = source.send_payment_with_route(&Route {
 431                 paths: vec![Path { hops: vec![RouteHop {
 432                         pubkey: middle.get_our_node_id(),
 433                         node_features: middle.node_features(),
 434                         short_channel_id: middle_chan_id,
 435                         channel_features: middle.channel_features(),
 436                         fee_msat: first_hop_fee,
 437                         cltv_expiry_delta: 100,
 438                         maybe_announced_channel: true,
 439                 }, RouteHop {
 440                         pubkey: dest.get_our_node_id(),
 441                         node_features: dest.node_features(),
 442                         short_channel_id: dest_chan_id,
 443                         channel_features: dest.channel_features(),
 444                         fee_msat: amt,
 445                         cltv_expiry_delta: 200,
 446                         maybe_announced_channel: true,
 447                 }], blinded_tail: None }],
 448                 route_params: None,
 449         }, payment_hash, RecipientOnionFields::secret_only(payment_secret), PaymentId(payment_id)) {
 450                 let sent_amt = amt + first_hop_fee;
 451                 check_payment_err(err, sent_amt < min_value_sendable || sent_amt > max_value_sendable);
 452                 false
 453         } else {
 454                 // Note that while the max is a strict upper-bound, we can occasionally send substantially
 455                 // below the minimum, with some gap which is unusable immediately below the minimum. Thus,
 456                 // we don't check against min_value_sendable here.
 457                 assert!(amt + first_hop_fee <= max_value_sendable);
 458                 true
 459         }
 460 }
 461
 462 #[inline]
 463 pub fn do_test<Out: Output>(data: &[u8], underlying_out: Out, anchors: bool) {
 464         let out = SearchingOutput::new(underlying_out);
 465         let broadcast = Arc::new(TestBroadcaster{});
 466         let router = FuzzRouter {};
 467
 468         macro_rules! make_node {
 469                 ($node_id: expr, $fee_estimator: expr) => { {
 470                         let logger: Arc<dyn Logger> = Arc::new(test_logger::TestLogger::new($node_id.to_string(), out.clone()));
 471                         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();
 472                         let keys_manager = Arc::new(KeyProvider { node_secret, rand_bytes_id: atomic::AtomicU32::new(0), enforcement_states: Mutex::new(new_hash_map()) });
 473                         let monitor = Arc::new(TestChainMonitor::new(broadcast.clone(), logger.clone(), $fee_estimator.clone(),
 474                                 Arc::new(TestPersister {
 475                                         update_ret: Mutex::new(ChannelMonitorUpdateStatus::Completed)
 476                                 }), Arc::clone(&keys_manager)));
 477
 478                         let mut config = UserConfig::default();
 479                         config.channel_config.forwarding_fee_proportional_millionths = 0;
 480                         config.channel_handshake_config.announced_channel = true;
 481                         if anchors {
 482                                 config.channel_handshake_config.negotiate_anchors_zero_fee_htlc_tx = true;
 483                                 config.manually_accept_inbound_channels = true;
 484                         }
 485                         let network = Network::Bitcoin;
 486                         let best_block_timestamp = genesis_block(network).header.time;
 487                         let params = ChainParameters {
 488                                 network,
 489                                 best_block: BestBlock::from_network(network),
 490                         };
 491                         (ChannelManager::new($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),
 492                         monitor, keys_manager)
 493                 } }
 494         }
 495
 496         macro_rules! reload_node {
 497                 ($ser: expr, $node_id: expr, $old_monitors: expr, $keys_manager: expr, $fee_estimator: expr) => { {
 498                     let keys_manager = Arc::clone(& $keys_manager);
 499                         let logger: Arc<dyn Logger> = Arc::new(test_logger::TestLogger::new($node_id.to_string(), out.clone()));
 500                         let chain_monitor = Arc::new(TestChainMonitor::new(broadcast.clone(), logger.clone(), $fee_estimator.clone(),
 501                                 Arc::new(TestPersister {
 502                                         update_ret: Mutex::new(ChannelMonitorUpdateStatus::Completed)
 503                                 }), Arc::clone(& $keys_manager)));
 504
 505                         let mut config = UserConfig::default();
 506                         config.channel_config.forwarding_fee_proportional_millionths = 0;
 507                         config.channel_handshake_config.announced_channel = true;
 508                         if anchors {
 509                                 config.channel_handshake_config.negotiate_anchors_zero_fee_htlc_tx = true;
 510                                 config.manually_accept_inbound_channels = true;
 511                         }
 512
 513                         let mut monitors = new_hash_map();
 514                         let mut old_monitors = $old_monitors.latest_monitors.lock().unwrap();
 515                         for (outpoint, (update_id, monitor_ser)) in old_monitors.drain() {
 516                                 monitors.insert(outpoint, <(BlockHash, ChannelMonitor<TestChannelSigner>)>::read(&mut Cursor::new(&monitor_ser), (&*$keys_manager, &*$keys_manager)).expect("Failed to read monitor").1);
 517                                 chain_monitor.latest_monitors.lock().unwrap().insert(outpoint, (update_id, monitor_ser));
 518                         }
 519                         let mut monitor_refs = new_hash_map();
 520                         for (outpoint, monitor) in monitors.iter_mut() {
 521                                 monitor_refs.insert(*outpoint, monitor);
 522                         }
 523
 524                         let read_args = ChannelManagerReadArgs {
 525                                 entropy_source: keys_manager.clone(),
 526                                 node_signer: keys_manager.clone(),
 527                                 signer_provider: keys_manager.clone(),
 528                                 fee_estimator: $fee_estimator.clone(),
 529                                 chain_monitor: chain_monitor.clone(),
 530                                 tx_broadcaster: broadcast.clone(),
 531                                 router: &router,
 532                                 logger,
 533                                 default_config: config,
 534                                 channel_monitors: monitor_refs,
 535                         };
 536
 537                         let res = (<(BlockHash, ChanMan)>::read(&mut Cursor::new(&$ser.0), read_args).expect("Failed to read manager").1, chain_monitor.clone());
 538                         for (funding_txo, mon) in monitors.drain() {
 539                                 assert_eq!(chain_monitor.chain_monitor.watch_channel(funding_txo, mon),
 540                                         Ok(ChannelMonitorUpdateStatus::Completed));
 541                         }
 542                         res
 543                 } }
 544         }
 545
 546         let mut channel_txn = Vec::new();
 547         macro_rules! make_channel {
 548                 ($source: expr, $dest: expr, $dest_keys_manager: expr, $chan_id: expr) => { {
 549                         $source.peer_connected(&$dest.get_our_node_id(), &Init {
 550                                 features: $dest.init_features(), networks: None, remote_network_address: None
 551                         }, true).unwrap();
 552                         $dest.peer_connected(&$source.get_our_node_id(), &Init {
 553                                 features: $source.init_features(), networks: None, remote_network_address: None
 554                         }, false).unwrap();
 555
 556                         $source.create_channel($dest.get_our_node_id(), 100_000, 42, 0, None, None).unwrap();
 557                         let open_channel = {
 558                                 let events = $source.get_and_clear_pending_msg_events();
 559                                 assert_eq!(events.len(), 1);
 560                                 if let events::MessageSendEvent::SendOpenChannel { ref msg, .. } = events[0] {
 561                                         msg.clone()
 562                                 } else { panic!("Wrong event type"); }
 563                         };
 564
 565                         $dest.handle_open_channel(&$source.get_our_node_id(), &open_channel);
 566                         let accept_channel = {
 567                                 if anchors {
 568                                         let events = $dest.get_and_clear_pending_events();
 569                                         assert_eq!(events.len(), 1);
 570                                         if let events::Event::OpenChannelRequest {
 571                                                 ref temporary_channel_id, ref counterparty_node_id, ..
 572                                         } = events[0] {
 573                                                 let mut random_bytes = [0u8; 16];
 574                                                 random_bytes.copy_from_slice(&$dest_keys_manager.get_secure_random_bytes()[..16]);
 575                                                 let user_channel_id = u128::from_be_bytes(random_bytes);
 576                                                 $dest.accept_inbound_channel(
 577                                                         temporary_channel_id,
 578                                                         counterparty_node_id,
 579                                                         user_channel_id,
 580                                                 ).unwrap();
 581                                         } else { panic!("Wrong event type"); }
 582                                 }
 583                                 let events = $dest.get_and_clear_pending_msg_events();
 584                                 assert_eq!(events.len(), 1);
 585                                 if let events::MessageSendEvent::SendAcceptChannel { ref msg, .. } = events[0] {
 586                                         msg.clone()
 587                                 } else { panic!("Wrong event type"); }
 588                         };
 589
 590                         $source.handle_accept_channel(&$dest.get_our_node_id(), &accept_channel);
 591                         let funding_output;
 592                         {
 593                                 let events = $source.get_and_clear_pending_events();
 594                                 assert_eq!(events.len(), 1);
 595                                 if let events::Event::FundingGenerationReady { ref temporary_channel_id, ref channel_value_satoshis, ref output_script, .. } = events[0] {
 596                                         let tx = Transaction { version: Version($chan_id), lock_time: LockTime::ZERO, input: Vec::new(), output: vec![TxOut {
 597                                                 value: Amount::from_sat(*channel_value_satoshis), script_pubkey: output_script.clone(),
 598                                         }]};
 599                                         funding_output = OutPoint { txid: tx.txid(), index: 0 };
 600                                         $source.funding_transaction_generated(&temporary_channel_id, &$dest.get_our_node_id(), tx.clone()).unwrap();
 601                                         channel_txn.push(tx);
 602                                 } else { panic!("Wrong event type"); }
 603                         }
 604
 605                         let funding_created = {
 606                                 let events = $source.get_and_clear_pending_msg_events();
 607                                 assert_eq!(events.len(), 1);
 608                                 if let events::MessageSendEvent::SendFundingCreated { ref msg, .. } = events[0] {
 609                                         msg.clone()
 610                                 } else { panic!("Wrong event type"); }
 611                         };
 612                         $dest.handle_funding_created(&$source.get_our_node_id(), &funding_created);
 613
 614                         let funding_signed = {
 615                                 let events = $dest.get_and_clear_pending_msg_events();
 616                                 assert_eq!(events.len(), 1);
 617                                 if let events::MessageSendEvent::SendFundingSigned { ref msg, .. } = events[0] {
 618                                         msg.clone()
 619                                 } else { panic!("Wrong event type"); }
 620                         };
 621                         let events = $dest.get_and_clear_pending_events();
 622                         assert_eq!(events.len(), 1);
 623                         if let events::Event::ChannelPending{ ref counterparty_node_id, .. } = events[0] {
 624                                 assert_eq!(counterparty_node_id, &$source.get_our_node_id());
 625                         } else { panic!("Wrong event type"); }
 626
 627                         $source.handle_funding_signed(&$dest.get_our_node_id(), &funding_signed);
 628                         let events = $source.get_and_clear_pending_events();
 629                         assert_eq!(events.len(), 1);
 630                         if let events::Event::ChannelPending{ ref counterparty_node_id, .. } = events[0] {
 631                                 assert_eq!(counterparty_node_id, &$dest.get_our_node_id());
 632                         } else { panic!("Wrong event type"); }
 633
 634                         funding_output
 635                 } }
 636         }
 637
 638         macro_rules! confirm_txn {
 639                 ($node: expr) => { {
 640                         let chain_hash = genesis_block(Network::Bitcoin).block_hash();
 641                         let mut header = create_dummy_header(chain_hash, 42);
 642                         let txdata: Vec<_> = channel_txn.iter().enumerate().map(|(i, tx)| (i + 1, tx)).collect();
 643                         $node.transactions_confirmed(&header, &txdata, 1);
 644                         for _ in 2..100 {
 645                                 header = create_dummy_header(header.block_hash(), 42);
 646                         }
 647                         $node.best_block_updated(&header, 99);
 648                 } }
 649         }
 650
 651         macro_rules! lock_fundings {
 652                 ($nodes: expr) => { {
 653                         let mut node_events = Vec::new();
 654                         for node in $nodes.iter() {
 655                                 node_events.push(node.get_and_clear_pending_msg_events());
 656                         }
 657                         for (idx, node_event) in node_events.iter().enumerate() {
 658                                 for event in node_event {
 659                                         if let events::MessageSendEvent::SendChannelReady { ref node_id, ref msg } = event {
 660                                                 for node in $nodes.iter() {
 661                                                         if node.get_our_node_id() == *node_id {
 662                                                                 node.handle_channel_ready(&$nodes[idx].get_our_node_id(), msg);
 663                                                         }
 664                                                 }
 665                                         } else { panic!("Wrong event type"); }
 666                                 }
 667                         }
 668
 669                         for node in $nodes.iter() {
 670                                 let events = node.get_and_clear_pending_msg_events();
 671                                 for event in events {
 672                                         if let events::MessageSendEvent::SendAnnouncementSignatures { .. } = event {
 673                                         } else { panic!("Wrong event type"); }
 674                                 }
 675                         }
 676                 } }
 677         }
 678
 679         let fee_est_a = Arc::new(FuzzEstimator { ret_val: atomic::AtomicU32::new(253) });
 680         let mut last_htlc_clear_fee_a =  253;
 681         let fee_est_b = Arc::new(FuzzEstimator { ret_val: atomic::AtomicU32::new(253) });
 682         let mut last_htlc_clear_fee_b =  253;
 683         let fee_est_c = Arc::new(FuzzEstimator { ret_val: atomic::AtomicU32::new(253) });
 684         let mut last_htlc_clear_fee_c =  253;
 685
 686         // 3 nodes is enough to hit all the possible cases, notably unknown-source-unknown-dest
 687         // forwarding.
 688         let (node_a, mut monitor_a, keys_manager_a) = make_node!(0, fee_est_a);
 689         let (node_b, mut monitor_b, keys_manager_b) = make_node!(1, fee_est_b);
 690         let (node_c, mut monitor_c, keys_manager_c) = make_node!(2, fee_est_c);
 691
 692         let mut nodes = [node_a, node_b, node_c];
 693
 694         let chan_1_funding = make_channel!(nodes[0], nodes[1], keys_manager_b, 0);
 695         let chan_2_funding = make_channel!(nodes[1], nodes[2], keys_manager_c, 1);
 696
 697         for node in nodes.iter() {
 698                 confirm_txn!(node);
 699         }
 700
 701         lock_fundings!(nodes);
 702
 703         let chan_a = nodes[0].list_usable_channels()[0].short_channel_id.unwrap();
 704         let chan_b = nodes[2].list_usable_channels()[0].short_channel_id.unwrap();
 705
 706         let mut payment_id: u8 = 0;
 707         let mut payment_idx: u64 = 0;
 708
 709         let mut chan_a_disconnected = false;
 710         let mut chan_b_disconnected = false;
 711         let mut ab_events = Vec::new();
 712         let mut ba_events = Vec::new();
 713         let mut bc_events = Vec::new();
 714         let mut cb_events = Vec::new();
 715
 716         let mut node_a_ser = VecWriter(Vec::new());
 717         nodes[0].write(&mut node_a_ser).unwrap();
 718         let mut node_b_ser = VecWriter(Vec::new());
 719         nodes[1].write(&mut node_b_ser).unwrap();
 720         let mut node_c_ser = VecWriter(Vec::new());
 721         nodes[2].write(&mut node_c_ser).unwrap();
 722
 723         macro_rules! test_return {
 724                 () => { {
 725                         assert_eq!(nodes[0].list_channels().len(), 1);
 726                         assert_eq!(nodes[1].list_channels().len(), 2);
 727                         assert_eq!(nodes[2].list_channels().len(), 1);
 728                         return;
 729                 } }
 730         }
 731
 732         let mut read_pos = 0;
 733         macro_rules! get_slice {
 734                 ($len: expr) => {
 735                         {
 736                                 let slice_len = $len as usize;
 737                                 if data.len() < read_pos + slice_len {
 738                                         test_return!();
 739                                 }
 740                                 read_pos += slice_len;
 741                                 &data[read_pos - slice_len..read_pos]
 742                         }
 743                 }
 744         }
 745
 746         loop {
 747                 // Push any events from Node B onto ba_events and bc_events
 748                 macro_rules! push_excess_b_events {
 749                         ($excess_events: expr, $expect_drop_node: expr) => { {
 750                                 let a_id = nodes[0].get_our_node_id();
 751                                 let expect_drop_node: Option<usize> = $expect_drop_node;
 752                                 let expect_drop_id = if let Some(id) = expect_drop_node { Some(nodes[id].get_our_node_id()) } else { None };
 753                                 for event in $excess_events {
 754                                         let push_a = match event {
 755                                                 events::MessageSendEvent::UpdateHTLCs { ref node_id, .. } => {
 756                                                         if Some(*node_id) == expect_drop_id { panic!("peer_disconnected should drop msgs bound for the disconnected peer"); }
 757                                                         *node_id == a_id
 758                                                 },
 759                                                 events::MessageSendEvent::SendRevokeAndACK { ref node_id, .. } => {
 760                                                         if Some(*node_id) == expect_drop_id { panic!("peer_disconnected should drop msgs bound for the disconnected peer"); }
 761                                                         *node_id == a_id
 762                                                 },
 763                                                 events::MessageSendEvent::SendChannelReestablish { ref node_id, .. } => {
 764                                                         if Some(*node_id) == expect_drop_id { panic!("peer_disconnected should drop msgs bound for the disconnected peer"); }
 765                                                         *node_id == a_id
 766                                                 },
 767                                                 events::MessageSendEvent::SendChannelReady { .. } => continue,
 768                                                 events::MessageSendEvent::SendAnnouncementSignatures { .. } => continue,
 769                                                 events::MessageSendEvent::SendChannelUpdate { ref node_id, ref msg } => {
 770                                                         assert_eq!(msg.contents.flags & 2, 0); // The disable bit must never be set!
 771                                                         if Some(*node_id) == expect_drop_id { panic!("peer_disconnected should drop msgs bound for the disconnected peer"); }
 772                                                         *node_id == a_id
 773                                                 },
 774                                                 _ => panic!("Unhandled message event {:?}", event),
 775                                         };
 776                                         if push_a { ba_events.push(event); } else { bc_events.push(event); }
 777                                 }
 778                         } }
 779                 }
 780
 781                 // While delivering messages, we select across three possible message selection processes
 782                 // to ensure we get as much coverage as possible. See the individual enum variants for more
 783                 // details.
 784                 #[derive(PartialEq)]
 785                 enum ProcessMessages {
 786                         /// Deliver all available messages, including fetching any new messages from
 787                         /// `get_and_clear_pending_msg_events()` (which may have side effects).
 788                         AllMessages,
 789                         /// Call `get_and_clear_pending_msg_events()` first, and then deliver up to one
 790                         /// message (which may already be queued).
 791                         OneMessage,
 792                         /// Deliver up to one already-queued message. This avoids any potential side-effects
 793                         /// of `get_and_clear_pending_msg_events()` (eg freeing the HTLC holding cell), which
 794                         /// provides potentially more coverage.
 795                         OnePendingMessage,
 796                 }
 797
 798                 macro_rules! process_msg_events {
 799                         ($node: expr, $corrupt_forward: expr, $limit_events: expr) => { {
 800                                 let mut events = if $node == 1 {
 801                                         let mut new_events = Vec::new();
 802                                         mem::swap(&mut new_events, &mut ba_events);
 803                                         new_events.extend_from_slice(&bc_events[..]);
 804                                         bc_events.clear();
 805                                         new_events
 806                                 } else if $node == 0 {
 807                                         let mut new_events = Vec::new();
 808                                         mem::swap(&mut new_events, &mut ab_events);
 809                                         new_events
 810                                 } else {
 811                                         let mut new_events = Vec::new();
 812                                         mem::swap(&mut new_events, &mut cb_events);
 813                                         new_events
 814                                 };
 815                                 let mut new_events = Vec::new();
 816                                 if $limit_events != ProcessMessages::OnePendingMessage {
 817                                         new_events = nodes[$node].get_and_clear_pending_msg_events();
 818                                 }
 819                                 let mut had_events = false;
 820                                 let mut events_iter = events.drain(..).chain(new_events.drain(..));
 821                                 let mut extra_ev = None;
 822                                 for event in &mut events_iter {
 823                                         had_events = true;
 824                                         match event {
 825                                                 events::MessageSendEvent::UpdateHTLCs { node_id, updates: CommitmentUpdate { update_add_htlcs, update_fail_htlcs, update_fulfill_htlcs, update_fail_malformed_htlcs, update_fee, commitment_signed } } => {
 826                                                         for (idx, dest) in nodes.iter().enumerate() {
 827                                                                 if dest.get_our_node_id() == node_id {
 828                                                                         for update_add in update_add_htlcs.iter() {
 829                                                                                 out.locked_write(format!("Delivering update_add_htlc to node {}.\n", idx).as_bytes());
 830                                                                                 if !$corrupt_forward {
 831                                                                                         dest.handle_update_add_htlc(&nodes[$node].get_our_node_id(), update_add);
 832                                                                                 } else {
 833                                                                                         // Corrupt the update_add_htlc message so that its HMAC
 834                                                                                         // check will fail and we generate a
 835                                                                                         // update_fail_malformed_htlc instead of an
 836                                                                                         // update_fail_htlc as we do when we reject a payment.
 837                                                                                         let mut msg_ser = update_add.encode();
 838                                                                                         msg_ser[1000] ^= 0xff;
 839                                                                                         let new_msg = UpdateAddHTLC::read(&mut Cursor::new(&msg_ser)).unwrap();
 840                                                                                         dest.handle_update_add_htlc(&nodes[$node].get_our_node_id(), &new_msg);
 841                                                                                 }
 842                                                                         }
 843                                                                         for update_fulfill in update_fulfill_htlcs.iter() {
 844                                                                                 out.locked_write(format!("Delivering update_fulfill_htlc to node {}.\n", idx).as_bytes());
 845                                                                                 dest.handle_update_fulfill_htlc(&nodes[$node].get_our_node_id(), update_fulfill);
 846                                                                         }
 847                                                                         for update_fail in update_fail_htlcs.iter() {
 848                                                                                 out.locked_write(format!("Delivering update_fail_htlc to node {}.\n", idx).as_bytes());
 849                                                                                 dest.handle_update_fail_htlc(&nodes[$node].get_our_node_id(), update_fail);
 850                                                                         }
 851                                                                         for update_fail_malformed in update_fail_malformed_htlcs.iter() {
 852                                                                                 out.locked_write(format!("Delivering update_fail_malformed_htlc to node {}.\n", idx).as_bytes());
 853                                                                                 dest.handle_update_fail_malformed_htlc(&nodes[$node].get_our_node_id(), update_fail_malformed);
 854                                                                         }
 855                                                                         if let Some(msg) = update_fee {
 856                                                                                 out.locked_write(format!("Delivering update_fee to node {}.\n", idx).as_bytes());
 857                                                                                 dest.handle_update_fee(&nodes[$node].get_our_node_id(), &msg);
 858                                                                         }
 859                                                                         let processed_change = !update_add_htlcs.is_empty() || !update_fulfill_htlcs.is_empty() ||
 860                                                                                 !update_fail_htlcs.is_empty() || !update_fail_malformed_htlcs.is_empty();
 861                                                                         if $limit_events != ProcessMessages::AllMessages && processed_change {
 862                                                                                 // If we only want to process some messages, don't deliver the CS until later.
 863                                                                                 extra_ev = Some(events::MessageSendEvent::UpdateHTLCs { node_id, updates: CommitmentUpdate {
 864                                                                                         update_add_htlcs: Vec::new(),
 865                                                                                         update_fail_htlcs: Vec::new(),
 866                                                                                         update_fulfill_htlcs: Vec::new(),
 867                                                                                         update_fail_malformed_htlcs: Vec::new(),
 868                                                                                         update_fee: None,
 869                                                                                         commitment_signed
 870                                                                                 } });
 871                                                                                 break;
 872                                                                         }
 873                                                                         out.locked_write(format!("Delivering commitment_signed to node {}.\n", idx).as_bytes());
 874                                                                         dest.handle_commitment_signed(&nodes[$node].get_our_node_id(), &commitment_signed);
 875                                                                         break;
 876                                                                 }
 877                                                         }
 878                                                 },
 879                                                 events::MessageSendEvent::SendRevokeAndACK { ref node_id, ref msg } => {
 880                                                         for (idx, dest) in nodes.iter().enumerate() {
 881                                                                 if dest.get_our_node_id() == *node_id {
 882                                                                         out.locked_write(format!("Delivering revoke_and_ack to node {}.\n", idx).as_bytes());
 883                                                                         dest.handle_revoke_and_ack(&nodes[$node].get_our_node_id(), msg);
 884                                                                 }
 885                                                         }
 886                                                 },
 887                                                 events::MessageSendEvent::SendChannelReestablish { ref node_id, ref msg } => {
 888                                                         for (idx, dest) in nodes.iter().enumerate() {
 889                                                                 if dest.get_our_node_id() == *node_id {
 890                                                                         out.locked_write(format!("Delivering channel_reestablish to node {}.\n", idx).as_bytes());
 891                                                                         dest.handle_channel_reestablish(&nodes[$node].get_our_node_id(), msg);
 892                                                                 }
 893                                                         }
 894                                                 },
 895                                                 events::MessageSendEvent::SendChannelReady { .. } => {
 896                                                         // Can be generated as a reestablish response
 897                                                 },
 898                                                 events::MessageSendEvent::SendAnnouncementSignatures { .. } => {
 899                                                         // Can be generated as a reestablish response
 900                                                 },
 901                                                 events::MessageSendEvent::SendChannelUpdate { ref msg, .. } => {
 902                                                         // When we reconnect we will resend a channel_update to make sure our
 903                                                         // counterparty has the latest parameters for receiving payments
 904                                                         // through us. We do, however, check that the message does not include
 905                                                         // the "disabled" bit, as we should never ever have a channel which is
 906                                                         // disabled when we send such an update (or it may indicate channel
 907                                                         // force-close which we should detect as an error).
 908                                                         assert_eq!(msg.contents.flags & 2, 0);
 909                                                 },
 910                                                 _ => if out.may_fail.load(atomic::Ordering::Acquire) {
 911                                                         return;
 912                                                 } else {
 913                                                         panic!("Unhandled message event {:?}", event)
 914                                                 },
 915                                         }
 916                                         if $limit_events != ProcessMessages::AllMessages {
 917                                                 break;
 918                                         }
 919                                 }
 920                                 if $node == 1 {
 921                                         push_excess_b_events!(extra_ev.into_iter().chain(events_iter), None);
 922                                 } else if $node == 0 {
 923                                         if let Some(ev) = extra_ev { ab_events.push(ev); }
 924                                         for event in events_iter { ab_events.push(event); }
 925                                 } else {
 926                                         if let Some(ev) = extra_ev { cb_events.push(ev); }
 927                                         for event in events_iter { cb_events.push(event); }
 928                                 }
 929                                 had_events
 930                         } }
 931                 }
 932
 933                 macro_rules! drain_msg_events_on_disconnect {
 934                         ($counterparty_id: expr) => { {
 935                                 if $counterparty_id == 0 {
 936                                         for event in nodes[0].get_and_clear_pending_msg_events() {
 937                                                 match event {
 938                                                         events::MessageSendEvent::UpdateHTLCs { .. } => {},
 939                                                         events::MessageSendEvent::SendRevokeAndACK { .. } => {},
 940                                                         events::MessageSendEvent::SendChannelReestablish { .. } => {},
 941                                                         events::MessageSendEvent::SendChannelReady { .. } => {},
 942                                                         events::MessageSendEvent::SendAnnouncementSignatures { .. } => {},
 943                                                         events::MessageSendEvent::SendChannelUpdate { ref msg, .. } => {
 944                                                                 assert_eq!(msg.contents.flags & 2, 0); // The disable bit must never be set!
 945                                                         },
 946                                                         _ => if out.may_fail.load(atomic::Ordering::Acquire) {
 947                                                                 return;
 948                                                         } else {
 949                                                                 panic!("Unhandled message event")
 950                                                         },
 951                                                 }
 952                                         }
 953                                         push_excess_b_events!(nodes[1].get_and_clear_pending_msg_events().drain(..), Some(0));
 954                                         ab_events.clear();
 955                                         ba_events.clear();
 956                                 } else {
 957                                         for event in nodes[2].get_and_clear_pending_msg_events() {
 958                                                 match event {
 959                                                         events::MessageSendEvent::UpdateHTLCs { .. } => {},
 960                                                         events::MessageSendEvent::SendRevokeAndACK { .. } => {},
 961                                                         events::MessageSendEvent::SendChannelReestablish { .. } => {},
 962                                                         events::MessageSendEvent::SendChannelReady { .. } => {},
 963                                                         events::MessageSendEvent::SendAnnouncementSignatures { .. } => {},
 964                                                         events::MessageSendEvent::SendChannelUpdate { ref msg, .. } => {
 965                                                                 assert_eq!(msg.contents.flags & 2, 0); // The disable bit must never be set!
 966                                                         },
 967                                                         _ => if out.may_fail.load(atomic::Ordering::Acquire) {
 968                                                                 return;
 969                                                         } else {
 970                                                                 panic!("Unhandled message event")
 971                                                         },
 972                                                 }
 973                                         }
 974                                         push_excess_b_events!(nodes[1].get_and_clear_pending_msg_events().drain(..), Some(2));
 975                                         bc_events.clear();
 976                                         cb_events.clear();
 977                                 }
 978                         } }
 979                 }
 980
 981                 macro_rules! process_events {
 982                         ($node: expr, $fail: expr) => { {
 983                                 // In case we get 256 payments we may have a hash collision, resulting in the
 984                                 // second claim/fail call not finding the duplicate-hash HTLC, so we have to
 985                                 // deduplicate the calls here.
 986                                 let mut claim_set = new_hash_map();
 987                                 let mut events = nodes[$node].get_and_clear_pending_events();
 988                                 // Sort events so that PendingHTLCsForwardable get processed last. This avoids a
 989                                 // case where we first process a PendingHTLCsForwardable, then claim/fail on a
 990                                 // PaymentClaimable, claiming/failing two HTLCs, but leaving a just-generated
 991                                 // PaymentClaimable event for the second HTLC in our pending_events (and breaking
 992                                 // our claim_set deduplication).
 993                                 events.sort_by(|a, b| {
 994                                         if let events::Event::PaymentClaimable { .. } = a {
 995                                                 if let events::Event::PendingHTLCsForwardable { .. } = b {
 996                                                         Ordering::Less
 997                                                 } else { Ordering::Equal }
 998                                         } else if let events::Event::PendingHTLCsForwardable { .. } = a {
 999                                                 if let events::Event::PaymentClaimable { .. } = b {
1000                                                         Ordering::Greater
1001                                                 } else { Ordering::Equal }
1002                                         } else { Ordering::Equal }
1003                                 });
1004                                 let had_events = !events.is_empty();
1005                                 for event in events.drain(..) {
1006                                         match event {
1007                                                 events::Event::PaymentClaimable { payment_hash, .. } => {
1008                                                         if claim_set.insert(payment_hash.0, ()).is_none() {
1009                                                                 if $fail {
1010                                                                         nodes[$node].fail_htlc_backwards(&payment_hash);
1011                                                                 } else {
1012                                                                         nodes[$node].claim_funds(PaymentPreimage(payment_hash.0));
1013                                                                 }
1014                                                         }
1015                                                 },
1016                                                 events::Event::PaymentSent { .. } => {},
1017                                                 events::Event::PaymentClaimed { .. } => {},
1018                                                 events::Event::PaymentPathSuccessful { .. } => {},
1019                                                 events::Event::PaymentPathFailed { .. } => {},
1020                                                 events::Event::PaymentFailed { .. } => {},
1021                                                 events::Event::ProbeSuccessful { .. } | events::Event::ProbeFailed { .. } => {
1022                                                         // Even though we don't explicitly send probes, because probes are
1023                                                         // detected based on hashing the payment hash+preimage, its rather
1024                                                         // trivial for the fuzzer to build payments that accidentally end up
1025                                                         // looking like probes.
1026                                                 },
1027                                                 events::Event::PaymentForwarded { .. } if $node == 1 => {},
1028                                                 events::Event::ChannelReady { .. } => {},
1029                                                 events::Event::PendingHTLCsForwardable { .. } => {
1030                                                         nodes[$node].process_pending_htlc_forwards();
1031                                                 },
1032                                                 events::Event::HTLCHandlingFailed { .. } => {},
1033                                                 _ => if out.may_fail.load(atomic::Ordering::Acquire) {
1034                                                         return;
1035                                                 } else {
1036                                                         panic!("Unhandled event")
1037                                                 },
1038                                         }
1039                                 }
1040                                 had_events
1041                         } }
1042                 }
1043
1044                 let v = get_slice!(1)[0];
1045                 out.locked_write(format!("READ A BYTE! HANDLING INPUT {:x}...........\n", v).as_bytes());
1046                 match v {
1047                         // In general, we keep related message groups close together in binary form, allowing
1048                         // bit-twiddling mutations to have similar effects. This is probably overkill, but no
1049                         // harm in doing so.
1050
1051                         0x00 => *monitor_a.persister.update_ret.lock().unwrap() = ChannelMonitorUpdateStatus::InProgress,
1052                         0x01 => *monitor_b.persister.update_ret.lock().unwrap() = ChannelMonitorUpdateStatus::InProgress,
1053                         0x02 => *monitor_c.persister.update_ret.lock().unwrap() = ChannelMonitorUpdateStatus::InProgress,
1054                         0x04 => *monitor_a.persister.update_ret.lock().unwrap() = ChannelMonitorUpdateStatus::Completed,
1055                         0x05 => *monitor_b.persister.update_ret.lock().unwrap() = ChannelMonitorUpdateStatus::Completed,
1056                         0x06 => *monitor_c.persister.update_ret.lock().unwrap() = ChannelMonitorUpdateStatus::Completed,
1057
1058                         0x08 => {
1059                                 if let Some((id, _)) = monitor_a.latest_monitors.lock().unwrap().get(&chan_1_funding) {
1060                                         monitor_a.chain_monitor.force_channel_monitor_updated(chan_1_funding, *id);
1061                                         nodes[0].process_monitor_events();
1062                                 }
1063                         },
1064                         0x09 => {
1065                                 if let Some((id, _)) = monitor_b.latest_monitors.lock().unwrap().get(&chan_1_funding) {
1066                                         monitor_b.chain_monitor.force_channel_monitor_updated(chan_1_funding, *id);
1067                                         nodes[1].process_monitor_events();
1068                                 }
1069                         },
1070                         0x0a => {
1071                                 if let Some((id, _)) = monitor_b.latest_monitors.lock().unwrap().get(&chan_2_funding) {
1072                                         monitor_b.chain_monitor.force_channel_monitor_updated(chan_2_funding, *id);
1073                                         nodes[1].process_monitor_events();
1074                                 }
1075                         },
1076                         0x0b => {
1077                                 if let Some((id, _)) = monitor_c.latest_monitors.lock().unwrap().get(&chan_2_funding) {
1078                                         monitor_c.chain_monitor.force_channel_monitor_updated(chan_2_funding, *id);
1079                                         nodes[2].process_monitor_events();
1080                                 }
1081                         },
1082
1083                         0x0c => {
1084                                 if !chan_a_disconnected {
1085                                         nodes[0].peer_disconnected(&nodes[1].get_our_node_id());
1086                                         nodes[1].peer_disconnected(&nodes[0].get_our_node_id());
1087                                         chan_a_disconnected = true;
1088                                         drain_msg_events_on_disconnect!(0);
1089                                 }
1090                         },
1091                         0x0d => {
1092                                 if !chan_b_disconnected {
1093                                         nodes[1].peer_disconnected(&nodes[2].get_our_node_id());
1094                                         nodes[2].peer_disconnected(&nodes[1].get_our_node_id());
1095                                         chan_b_disconnected = true;
1096                                         drain_msg_events_on_disconnect!(2);
1097                                 }
1098                         },
1099                         0x0e => {
1100                                 if chan_a_disconnected {
1101                                         nodes[0].peer_connected(&nodes[1].get_our_node_id(), &Init {
1102                                                 features: nodes[1].init_features(), networks: None, remote_network_address: None
1103                                         }, true).unwrap();
1104                                         nodes[1].peer_connected(&nodes[0].get_our_node_id(), &Init {
1105                                                 features: nodes[0].init_features(), networks: None, remote_network_address: None
1106                                         }, false).unwrap();
1107                                         chan_a_disconnected = false;
1108                                 }
1109                         },
1110                         0x0f => {
1111                                 if chan_b_disconnected {
1112                                         nodes[1].peer_connected(&nodes[2].get_our_node_id(), &Init {
1113                                                 features: nodes[2].init_features(), networks: None, remote_network_address: None
1114                                         }, true).unwrap();
1115                                         nodes[2].peer_connected(&nodes[1].get_our_node_id(), &Init {
1116                                                 features: nodes[1].init_features(), networks: None, remote_network_address: None
1117                                         }, false).unwrap();
1118                                         chan_b_disconnected = false;
1119                                 }
1120                         },
1121
1122                         0x10 => { process_msg_events!(0, true, ProcessMessages::AllMessages); },
1123                         0x11 => { process_msg_events!(0, false, ProcessMessages::AllMessages); },
1124                         0x12 => { process_msg_events!(0, true, ProcessMessages::OneMessage); },
1125                         0x13 => { process_msg_events!(0, false, ProcessMessages::OneMessage); },
1126                         0x14 => { process_msg_events!(0, true, ProcessMessages::OnePendingMessage); },
1127                         0x15 => { process_msg_events!(0, false, ProcessMessages::OnePendingMessage); },
1128
1129                         0x16 => { process_events!(0, true); },
1130                         0x17 => { process_events!(0, false); },
1131
1132                         0x18 => { process_msg_events!(1, true, ProcessMessages::AllMessages); },
1133                         0x19 => { process_msg_events!(1, false, ProcessMessages::AllMessages); },
1134                         0x1a => { process_msg_events!(1, true, ProcessMessages::OneMessage); },
1135                         0x1b => { process_msg_events!(1, false, ProcessMessages::OneMessage); },
1136                         0x1c => { process_msg_events!(1, true, ProcessMessages::OnePendingMessage); },
1137                         0x1d => { process_msg_events!(1, false, ProcessMessages::OnePendingMessage); },
1138
1139                         0x1e => { process_events!(1, true); },
1140                         0x1f => { process_events!(1, false); },
1141
1142                         0x20 => { process_msg_events!(2, true, ProcessMessages::AllMessages); },
1143                         0x21 => { process_msg_events!(2, false, ProcessMessages::AllMessages); },
1144                         0x22 => { process_msg_events!(2, true, ProcessMessages::OneMessage); },
1145                         0x23 => { process_msg_events!(2, false, ProcessMessages::OneMessage); },
1146                         0x24 => { process_msg_events!(2, true, ProcessMessages::OnePendingMessage); },
1147                         0x25 => { process_msg_events!(2, false, ProcessMessages::OnePendingMessage); },
1148
1149                         0x26 => { process_events!(2, true); },
1150                         0x27 => { process_events!(2, false); },
1151
1152                         0x2c => {
1153                                 if !chan_a_disconnected {
1154                                         nodes[1].peer_disconnected(&nodes[0].get_our_node_id());
1155                                         chan_a_disconnected = true;
1156                                         push_excess_b_events!(nodes[1].get_and_clear_pending_msg_events().drain(..), Some(0));
1157                                         ab_events.clear();
1158                                         ba_events.clear();
1159                                 }
1160                                 let (new_node_a, new_monitor_a) = reload_node!(node_a_ser, 0, monitor_a, keys_manager_a, fee_est_a);
1161                                 nodes[0] = new_node_a;
1162                                 monitor_a = new_monitor_a;
1163                         },
1164                         0x2d => {
1165                                 if !chan_a_disconnected {
1166                                         nodes[0].peer_disconnected(&nodes[1].get_our_node_id());
1167                                         chan_a_disconnected = true;
1168                                         nodes[0].get_and_clear_pending_msg_events();
1169                                         ab_events.clear();
1170                                         ba_events.clear();
1171                                 }
1172                                 if !chan_b_disconnected {
1173                                         nodes[2].peer_disconnected(&nodes[1].get_our_node_id());
1174                                         chan_b_disconnected = true;
1175                                         nodes[2].get_and_clear_pending_msg_events();
1176                                         bc_events.clear();
1177                                         cb_events.clear();
1178                                 }
1179                                 let (new_node_b, new_monitor_b) = reload_node!(node_b_ser, 1, monitor_b, keys_manager_b, fee_est_b);
1180                                 nodes[1] = new_node_b;
1181                                 monitor_b = new_monitor_b;
1182                         },
1183                         0x2e => {
1184                                 if !chan_b_disconnected {
1185                                         nodes[1].peer_disconnected(&nodes[2].get_our_node_id());
1186                                         chan_b_disconnected = true;
1187                                         push_excess_b_events!(nodes[1].get_and_clear_pending_msg_events().drain(..), Some(2));
1188                                         bc_events.clear();
1189                                         cb_events.clear();
1190                                 }
1191                                 let (new_node_c, new_monitor_c) = reload_node!(node_c_ser, 2, monitor_c, keys_manager_c, fee_est_c);
1192                                 nodes[2] = new_node_c;
1193                                 monitor_c = new_monitor_c;
1194                         },
1195
1196                         // 1/10th the channel size:
1197                         0x30 => { send_payment(&nodes[0], &nodes[1], chan_a, 10_000_000, &mut payment_id, &mut payment_idx); },
1198                         0x31 => { send_payment(&nodes[1], &nodes[0], chan_a, 10_000_000, &mut payment_id, &mut payment_idx); },
1199                         0x32 => { send_payment(&nodes[1], &nodes[2], chan_b, 10_000_000, &mut payment_id, &mut payment_idx); },
1200                         0x33 => { send_payment(&nodes[2], &nodes[1], chan_b, 10_000_000, &mut payment_id, &mut payment_idx); },
1201                         0x34 => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 10_000_000, &mut payment_id, &mut payment_idx); },
1202                         0x35 => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 10_000_000, &mut payment_id, &mut payment_idx); },
1203
1204                         0x38 => { send_payment(&nodes[0], &nodes[1], chan_a, 1_000_000, &mut payment_id, &mut payment_idx); },
1205                         0x39 => { send_payment(&nodes[1], &nodes[0], chan_a, 1_000_000, &mut payment_id, &mut payment_idx); },
1206                         0x3a => { send_payment(&nodes[1], &nodes[2], chan_b, 1_000_000, &mut payment_id, &mut payment_idx); },
1207                         0x3b => { send_payment(&nodes[2], &nodes[1], chan_b, 1_000_000, &mut payment_id, &mut payment_idx); },
1208                         0x3c => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 1_000_000, &mut payment_id, &mut payment_idx); },
1209                         0x3d => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 1_000_000, &mut payment_id, &mut payment_idx); },
1210
1211                         0x40 => { send_payment(&nodes[0], &nodes[1], chan_a, 100_000, &mut payment_id, &mut payment_idx); },
1212                         0x41 => { send_payment(&nodes[1], &nodes[0], chan_a, 100_000, &mut payment_id, &mut payment_idx); },
1213                         0x42 => { send_payment(&nodes[1], &nodes[2], chan_b, 100_000, &mut payment_id, &mut payment_idx); },
1214                         0x43 => { send_payment(&nodes[2], &nodes[1], chan_b, 100_000, &mut payment_id, &mut payment_idx); },
1215                         0x44 => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 100_000, &mut payment_id, &mut payment_idx); },
1216                         0x45 => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 100_000, &mut payment_id, &mut payment_idx); },
1217
1218                         0x48 => { send_payment(&nodes[0], &nodes[1], chan_a, 10_000, &mut payment_id, &mut payment_idx); },
1219                         0x49 => { send_payment(&nodes[1], &nodes[0], chan_a, 10_000, &mut payment_id, &mut payment_idx); },
1220                         0x4a => { send_payment(&nodes[1], &nodes[2], chan_b, 10_000, &mut payment_id, &mut payment_idx); },
1221                         0x4b => { send_payment(&nodes[2], &nodes[1], chan_b, 10_000, &mut payment_id, &mut payment_idx); },
1222                         0x4c => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 10_000, &mut payment_id, &mut payment_idx); },
1223                         0x4d => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 10_000, &mut payment_id, &mut payment_idx); },
1224
1225                         0x50 => { send_payment(&nodes[0], &nodes[1], chan_a, 1_000, &mut payment_id, &mut payment_idx); },
1226                         0x51 => { send_payment(&nodes[1], &nodes[0], chan_a, 1_000, &mut payment_id, &mut payment_idx); },
1227                         0x52 => { send_payment(&nodes[1], &nodes[2], chan_b, 1_000, &mut payment_id, &mut payment_idx); },
1228                         0x53 => { send_payment(&nodes[2], &nodes[1], chan_b, 1_000, &mut payment_id, &mut payment_idx); },
1229                         0x54 => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 1_000, &mut payment_id, &mut payment_idx); },
1230                         0x55 => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 1_000, &mut payment_id, &mut payment_idx); },
1231
1232                         0x58 => { send_payment(&nodes[0], &nodes[1], chan_a, 100, &mut payment_id, &mut payment_idx); },
1233                         0x59 => { send_payment(&nodes[1], &nodes[0], chan_a, 100, &mut payment_id, &mut payment_idx); },
1234                         0x5a => { send_payment(&nodes[1], &nodes[2], chan_b, 100, &mut payment_id, &mut payment_idx); },
1235                         0x5b => { send_payment(&nodes[2], &nodes[1], chan_b, 100, &mut payment_id, &mut payment_idx); },
1236                         0x5c => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 100, &mut payment_id, &mut payment_idx); },
1237                         0x5d => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 100, &mut payment_id, &mut payment_idx); },
1238
1239                         0x60 => { send_payment(&nodes[0], &nodes[1], chan_a, 10, &mut payment_id, &mut payment_idx); },
1240                         0x61 => { send_payment(&nodes[1], &nodes[0], chan_a, 10, &mut payment_id, &mut payment_idx); },
1241                         0x62 => { send_payment(&nodes[1], &nodes[2], chan_b, 10, &mut payment_id, &mut payment_idx); },
1242                         0x63 => { send_payment(&nodes[2], &nodes[1], chan_b, 10, &mut payment_id, &mut payment_idx); },
1243                         0x64 => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 10, &mut payment_id, &mut payment_idx); },
1244                         0x65 => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 10, &mut payment_id, &mut payment_idx); },
1245
1246                         0x68 => { send_payment(&nodes[0], &nodes[1], chan_a, 1, &mut payment_id, &mut payment_idx); },
1247                         0x69 => { send_payment(&nodes[1], &nodes[0], chan_a, 1, &mut payment_id, &mut payment_idx); },
1248                         0x6a => { send_payment(&nodes[1], &nodes[2], chan_b, 1, &mut payment_id, &mut payment_idx); },
1249                         0x6b => { send_payment(&nodes[2], &nodes[1], chan_b, 1, &mut payment_id, &mut payment_idx); },
1250                         0x6c => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 1, &mut payment_id, &mut payment_idx); },
1251                         0x6d => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 1, &mut payment_id, &mut payment_idx); },
1252
1253                         0x80 => {
1254                                 let mut max_feerate = last_htlc_clear_fee_a;
1255                                 if !anchors {
1256                                         max_feerate *= FEE_SPIKE_BUFFER_FEE_INCREASE_MULTIPLE as u32;
1257                                 }
1258                                 if fee_est_a.ret_val.fetch_add(250, atomic::Ordering::AcqRel) + 250 > max_feerate {
1259                                         fee_est_a.ret_val.store(max_feerate, atomic::Ordering::Release);
1260                                 }
1261                                 nodes[0].maybe_update_chan_fees();
1262                         },
1263                         0x81 => { fee_est_a.ret_val.store(253, atomic::Ordering::Release); nodes[0].maybe_update_chan_fees(); },
1264
1265                         0x84 => {
1266                                 let mut max_feerate = last_htlc_clear_fee_b;
1267                                 if !anchors {
1268                                         max_feerate *= FEE_SPIKE_BUFFER_FEE_INCREASE_MULTIPLE as u32;
1269                                 }
1270                                 if fee_est_b.ret_val.fetch_add(250, atomic::Ordering::AcqRel) + 250 > max_feerate {
1271                                         fee_est_b.ret_val.store(max_feerate, atomic::Ordering::Release);
1272                                 }
1273                                 nodes[1].maybe_update_chan_fees();
1274                         },
1275                         0x85 => { fee_est_b.ret_val.store(253, atomic::Ordering::Release); nodes[1].maybe_update_chan_fees(); },
1276
1277                         0x88 => {
1278                                 let mut max_feerate = last_htlc_clear_fee_c;
1279                                 if !anchors {
1280                                         max_feerate *= FEE_SPIKE_BUFFER_FEE_INCREASE_MULTIPLE as u32;
1281                                 }
1282                                 if fee_est_c.ret_val.fetch_add(250, atomic::Ordering::AcqRel) + 250 > max_feerate {
1283                                         fee_est_c.ret_val.store(max_feerate, atomic::Ordering::Release);
1284                                 }
1285                                 nodes[2].maybe_update_chan_fees();
1286                         },
1287                         0x89 => { fee_est_c.ret_val.store(253, atomic::Ordering::Release); nodes[2].maybe_update_chan_fees(); },
1288
1289                         0xf0 => {
1290                                 let pending_updates = monitor_a.chain_monitor.list_pending_monitor_updates().remove(&chan_1_funding).unwrap();
1291                                 if let Some(id) = pending_updates.get(0) {
1292                                         monitor_a.chain_monitor.channel_monitor_updated(chan_1_funding, *id).unwrap();
1293                                 }
1294                                 nodes[0].process_monitor_events();
1295                         }
1296                         0xf1 => {
1297                                 let pending_updates = monitor_a.chain_monitor.list_pending_monitor_updates().remove(&chan_1_funding).unwrap();
1298                                 if let Some(id) = pending_updates.get(1) {
1299                                         monitor_a.chain_monitor.channel_monitor_updated(chan_1_funding, *id).unwrap();
1300                                 }
1301                                 nodes[0].process_monitor_events();
1302                         }
1303                         0xf2 => {
1304                                 let pending_updates = monitor_a.chain_monitor.list_pending_monitor_updates().remove(&chan_1_funding).unwrap();
1305                                 if let Some(id) = pending_updates.last() {
1306                                         monitor_a.chain_monitor.channel_monitor_updated(chan_1_funding, *id).unwrap();
1307                                 }
1308                                 nodes[0].process_monitor_events();
1309                         }
1310
1311                         0xf4 => {
1312                                 let pending_updates = monitor_b.chain_monitor.list_pending_monitor_updates().remove(&chan_1_funding).unwrap();
1313                                 if let Some(id) = pending_updates.get(0) {
1314                                         monitor_b.chain_monitor.channel_monitor_updated(chan_1_funding, *id).unwrap();
1315                                 }
1316                                 nodes[1].process_monitor_events();
1317                         }
1318                         0xf5 => {
1319                                 let pending_updates = monitor_b.chain_monitor.list_pending_monitor_updates().remove(&chan_1_funding).unwrap();
1320                                 if let Some(id) = pending_updates.get(1) {
1321                                         monitor_b.chain_monitor.channel_monitor_updated(chan_1_funding, *id).unwrap();
1322                                 }
1323                                 nodes[1].process_monitor_events();
1324                         }
1325                         0xf6 => {
1326                                 let pending_updates = monitor_b.chain_monitor.list_pending_monitor_updates().remove(&chan_1_funding).unwrap();
1327                                 if let Some(id) = pending_updates.last() {
1328                                         monitor_b.chain_monitor.channel_monitor_updated(chan_1_funding, *id).unwrap();
1329                                 }
1330                                 nodes[1].process_monitor_events();
1331                         }
1332
1333                         0xf8 => {
1334                                 let pending_updates = monitor_b.chain_monitor.list_pending_monitor_updates().remove(&chan_2_funding).unwrap();
1335                                 if let Some(id) = pending_updates.get(0) {
1336                                         monitor_b.chain_monitor.channel_monitor_updated(chan_2_funding, *id).unwrap();
1337                                 }
1338                                 nodes[1].process_monitor_events();
1339                         }
1340                         0xf9 => {
1341                                 let pending_updates = monitor_b.chain_monitor.list_pending_monitor_updates().remove(&chan_2_funding).unwrap();
1342                                 if let Some(id) = pending_updates.get(1) {
1343                                         monitor_b.chain_monitor.channel_monitor_updated(chan_2_funding, *id).unwrap();
1344                                 }
1345                                 nodes[1].process_monitor_events();
1346                         }
1347                         0xfa => {
1348                                 let pending_updates = monitor_b.chain_monitor.list_pending_monitor_updates().remove(&chan_2_funding).unwrap();
1349                                 if let Some(id) = pending_updates.last() {
1350                                         monitor_b.chain_monitor.channel_monitor_updated(chan_2_funding, *id).unwrap();
1351                                 }
1352                                 nodes[1].process_monitor_events();
1353                         }
1354
1355                         0xfc => {
1356                                 let pending_updates = monitor_c.chain_monitor.list_pending_monitor_updates().remove(&chan_2_funding).unwrap();
1357                                 if let Some(id) = pending_updates.get(0) {
1358                                         monitor_c.chain_monitor.channel_monitor_updated(chan_2_funding, *id).unwrap();
1359                                 }
1360                                 nodes[2].process_monitor_events();
1361                         }
1362                         0xfd => {
1363                                 let pending_updates = monitor_c.chain_monitor.list_pending_monitor_updates().remove(&chan_2_funding).unwrap();
1364                                 if let Some(id) = pending_updates.get(1) {
1365                                         monitor_c.chain_monitor.channel_monitor_updated(chan_2_funding, *id).unwrap();
1366                                 }
1367                                 nodes[2].process_monitor_events();
1368                         }
1369                         0xfe => {
1370                                 let pending_updates = monitor_c.chain_monitor.list_pending_monitor_updates().remove(&chan_2_funding).unwrap();
1371                                 if let Some(id) = pending_updates.last() {
1372                                         monitor_c.chain_monitor.channel_monitor_updated(chan_2_funding, *id).unwrap();
1373                                 }
1374                                 nodes[2].process_monitor_events();
1375                         }
1376
1377                         0xff => {
1378                                 // Test that no channel is in a stuck state where neither party can send funds even
1379                                 // after we resolve all pending events.
1380                                 // First make sure there are no pending monitor updates, resetting the error state
1381                                 // and calling force_channel_monitor_updated for each monitor.
1382                                 *monitor_a.persister.update_ret.lock().unwrap() = ChannelMonitorUpdateStatus::Completed;
1383                                 *monitor_b.persister.update_ret.lock().unwrap() = ChannelMonitorUpdateStatus::Completed;
1384                                 *monitor_c.persister.update_ret.lock().unwrap() = ChannelMonitorUpdateStatus::Completed;
1385
1386                                 if let Some((id, _)) = monitor_a.latest_monitors.lock().unwrap().get(&chan_1_funding) {
1387                                         monitor_a.chain_monitor.force_channel_monitor_updated(chan_1_funding, *id);
1388                                         nodes[0].process_monitor_events();
1389                                 }
1390                                 if let Some((id, _)) = monitor_b.latest_monitors.lock().unwrap().get(&chan_1_funding) {
1391                                         monitor_b.chain_monitor.force_channel_monitor_updated(chan_1_funding, *id);
1392                                         nodes[1].process_monitor_events();
1393                                 }
1394                                 if let Some((id, _)) = monitor_b.latest_monitors.lock().unwrap().get(&chan_2_funding) {
1395                                         monitor_b.chain_monitor.force_channel_monitor_updated(chan_2_funding, *id);
1396                                         nodes[1].process_monitor_events();
1397                                 }
1398                                 if let Some((id, _)) = monitor_c.latest_monitors.lock().unwrap().get(&chan_2_funding) {
1399                                         monitor_c.chain_monitor.force_channel_monitor_updated(chan_2_funding, *id);
1400                                         nodes[2].process_monitor_events();
1401                                 }
1402
1403                                 // Next, make sure peers are all connected to each other
1404                                 if chan_a_disconnected {
1405                                         nodes[0].peer_connected(&nodes[1].get_our_node_id(), &Init {
1406                                                 features: nodes[1].init_features(), networks: None, remote_network_address: None
1407                                         }, true).unwrap();
1408                                         nodes[1].peer_connected(&nodes[0].get_our_node_id(), &Init {
1409                                                 features: nodes[0].init_features(), networks: None, remote_network_address: None
1410                                         }, false).unwrap();
1411                                         chan_a_disconnected = false;
1412                                 }
1413                                 if chan_b_disconnected {
1414                                         nodes[1].peer_connected(&nodes[2].get_our_node_id(), &Init {
1415                                                 features: nodes[2].init_features(), networks: None, remote_network_address: None
1416                                         }, true).unwrap();
1417                                         nodes[2].peer_connected(&nodes[1].get_our_node_id(), &Init {
1418                                                 features: nodes[1].init_features(), networks: None, remote_network_address: None
1419                                         }, false).unwrap();
1420                                         chan_b_disconnected = false;
1421                                 }
1422
1423                                 for i in 0..std::usize::MAX {
1424                                         if i == 100 { panic!("It may take may iterations to settle the state, but it should not take forever"); }
1425                                         // Then, make sure any current forwards make their way to their destination
1426                                         if process_msg_events!(0, false, ProcessMessages::AllMessages) { continue; }
1427                                         if process_msg_events!(1, false, ProcessMessages::AllMessages) { continue; }
1428                                         if process_msg_events!(2, false, ProcessMessages::AllMessages) { continue; }
1429                                         // ...making sure any pending PendingHTLCsForwardable events are handled and
1430                                         // payments claimed.
1431                                         if process_events!(0, false) { continue; }
1432                                         if process_events!(1, false) { continue; }
1433                                         if process_events!(2, false) { continue; }
1434                                         break;
1435                                 }
1436
1437                                 // Finally, make sure that at least one end of each channel can make a substantial payment
1438                                 assert!(
1439                                         send_payment(&nodes[0], &nodes[1], chan_a, 10_000_000, &mut payment_id, &mut payment_idx) ||
1440                                         send_payment(&nodes[1], &nodes[0], chan_a, 10_000_000, &mut payment_id, &mut payment_idx));
1441                                 assert!(
1442                                         send_payment(&nodes[1], &nodes[2], chan_b, 10_000_000, &mut payment_id, &mut payment_idx) ||
1443                                         send_payment(&nodes[2], &nodes[1], chan_b, 10_000_000, &mut payment_id, &mut payment_idx));
1444
1445                                 last_htlc_clear_fee_a = fee_est_a.ret_val.load(atomic::Ordering::Acquire);
1446                                 last_htlc_clear_fee_b = fee_est_b.ret_val.load(atomic::Ordering::Acquire);
1447                                 last_htlc_clear_fee_c = fee_est_c.ret_val.load(atomic::Ordering::Acquire);
1448                         },
1449                         _ => test_return!(),
1450                 }
1451
1452                 if nodes[0].get_and_clear_needs_persistence() == true {
1453                         node_a_ser.0.clear();
1454                         nodes[0].write(&mut node_a_ser).unwrap();
1455                 }
1456                 if nodes[1].get_and_clear_needs_persistence() == true {
1457                         node_b_ser.0.clear();
1458                         nodes[1].write(&mut node_b_ser).unwrap();
1459                 }
1460                 if nodes[2].get_and_clear_needs_persistence() == true {
1461                         node_c_ser.0.clear();
1462                         nodes[2].write(&mut node_c_ser).unwrap();
1463                 }
1464         }
1465 }
1466
1467 /// We actually have different behavior based on if a certain log string has been seen, so we have
1468 /// to do a bit more tracking.
1469 #[derive(Clone)]
1470 struct SearchingOutput<O: Output> {
1471         output: O,
1472         may_fail: Arc<atomic::AtomicBool>,
1473 }
1474 impl<O: Output> Output for SearchingOutput<O> {
1475         fn locked_write(&self, data: &[u8]) {
1476                 // We hit a design limitation of LN state machine (see CONCURRENT_INBOUND_HTLC_FEE_BUFFER)
1477                 if std::str::from_utf8(data).unwrap().contains("Outbound update_fee HTLC buffer overflow - counterparty should force-close this channel") {
1478                         self.may_fail.store(true, atomic::Ordering::Release);
1479                 }
1480                 self.output.locked_write(data)
1481         }
1482 }
1483 impl<O: Output> SearchingOutput<O> {
1484         pub fn new(output: O) -> Self {
1485                 Self { output, may_fail: Arc::new(atomic::AtomicBool::new(false)) }
1486         }
1487 }
1488
1489 pub fn chanmon_consistency_test<Out: Output>(data: &[u8], out: Out) {
1490         do_test(data, out.clone(), false);
1491         do_test(data, out, true);
1492 }
1493
1494 #[no_mangle]
1495 pub extern "C" fn chanmon_consistency_run(data: *const u8, datalen: usize) {
1496         do_test(unsafe { std::slice::from_raw_parts(data, datalen) }, test_logger::DevNull{}, false);
1497         do_test(unsafe { std::slice::from_raw_parts(data, datalen) }, test_logger::DevNull{}, true);
1498 }