_ Git - rust-lightning/blob - lightning/src/ln/functional_test_utils.rs

   1 //! A bunch of useful utilities for building networks of nodes and exchanging messages between
   2 //! nodes for functional tests.
   3
   4 use chain::chaininterface;
   5 use chain::transaction::OutPoint;
   6 use chain::keysinterface::KeysInterface;
   7 use ln::channelmanager::{ChannelManager, ChannelManagerReadArgs, RAACommitmentOrder, PaymentPreimage, PaymentHash};
   8 use ln::channelmonitor::{ChannelMonitor, ManyChannelMonitor};
   9 use ln::router::{Route, Router, RouterReadArgs};
  10 use ln::features::InitFeatures;
  11 use ln::msgs;
  12 use ln::msgs::{ChannelMessageHandler,RoutingMessageHandler};
  13 use util::enforcing_trait_impls::EnforcingChannelKeys;
  14 use util::test_utils;
  15 use util::test_utils::TestChannelMonitor;
  16 use util::events::{Event, EventsProvider, MessageSendEvent, MessageSendEventsProvider};
  17 use util::errors::APIError;
  18 use util::logger::Logger;
  19 use util::config::UserConfig;
  20 use util::ser::{ReadableArgs, Writeable};
  21
  22 use bitcoin::util::hash::BitcoinHash;
  23 use bitcoin::blockdata::block::BlockHeader;
  24 use bitcoin::blockdata::transaction::{Transaction, TxOut};
  25 use bitcoin::network::constants::Network;
  26
  27 use bitcoin_hashes::sha256::Hash as Sha256;
  28 use bitcoin_hashes::sha256d::Hash as Sha256d;
  29 use bitcoin_hashes::Hash;
  30
  31 use secp256k1::Secp256k1;
  32 use secp256k1::key::PublicKey;
  33
  34 use rand::{thread_rng,Rng};
  35
  36 use std::cell::RefCell;
  37 use std::rc::Rc;
  38 use std::sync::{Arc, Mutex};
  39 use std::mem;
  40 use std::collections::HashMap;
  41
  42 pub const CHAN_CONFIRM_DEPTH: u32 = 100;
  43 pub fn confirm_transaction<'a, 'b: 'a>(notifier: &'a chaininterface::BlockNotifierRef<'b>, chain: &chaininterface::ChainWatchInterfaceUtil, tx: &Transaction, chan_id: u32) {
  44         assert!(chain.does_match_tx(tx));
  45         let mut header = BlockHeader { version: 0x20000000, prev_blockhash: Default::default(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
  46         notifier.block_connected_checked(&header, 1, &[tx; 1], &[chan_id; 1]);
  47         for i in 2..CHAN_CONFIRM_DEPTH {
  48                 header = BlockHeader { version: 0x20000000, prev_blockhash: header.bitcoin_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
  49                 notifier.block_connected_checked(&header, i, &vec![], &[0; 0]);
  50         }
  51 }
  52
  53 pub fn connect_blocks<'a, 'b>(notifier: &'a chaininterface::BlockNotifierRef<'b>, depth: u32, height: u32, parent: bool, prev_blockhash: Sha256d) -> Sha256d {
  54         let mut header = BlockHeader { version: 0x2000000, prev_blockhash: if parent { prev_blockhash } else { Default::default() }, merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
  55         notifier.block_connected_checked(&header, height + 1, &Vec::new(), &Vec::new());
  56         for i in 2..depth + 1 {
  57                 header = BlockHeader { version: 0x20000000, prev_blockhash: header.bitcoin_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
  58                 notifier.block_connected_checked(&header, height + i, &Vec::new(), &Vec::new());
  59         }
  60         header.bitcoin_hash()
  61 }
  62
  63 pub struct TestChanMonCfg {
  64         pub tx_broadcaster: test_utils::TestBroadcaster,
  65         pub fee_estimator: test_utils::TestFeeEstimator,
  66 }
  67
  68 pub struct NodeCfg<'a> {
  69         pub chain_monitor: Arc<chaininterface::ChainWatchInterfaceUtil>,
  70         pub tx_broadcaster: &'a test_utils::TestBroadcaster,
  71         pub fee_estimator: &'a test_utils::TestFeeEstimator,
  72         pub chan_monitor: test_utils::TestChannelMonitor<'a>,
  73         pub keys_manager: test_utils::TestKeysInterface,
  74         pub logger: Arc<test_utils::TestLogger>,
  75         pub node_seed: [u8; 32],
  76 }
  77
  78 pub struct Node<'a, 'b: 'a, 'c: 'b> {
  79         pub block_notifier: chaininterface::BlockNotifierRef<'a>,
  80         pub chain_monitor: Arc<chaininterface::ChainWatchInterfaceUtil>,
  81         pub tx_broadcaster: &'c test_utils::TestBroadcaster,
  82         pub chan_monitor: &'b test_utils::TestChannelMonitor<'c>,
  83         pub keys_manager: &'b test_utils::TestKeysInterface,
  84         pub node: &'a ChannelManager<EnforcingChannelKeys, &'b TestChannelMonitor<'c>, &'c test_utils::TestBroadcaster, &'b test_utils::TestKeysInterface, &'c test_utils::TestFeeEstimator>,
  85         pub router: Router,
  86         pub node_seed: [u8; 32],
  87         pub network_payment_count: Rc<RefCell<u8>>,
  88         pub network_chan_count: Rc<RefCell<u32>>,
  89         pub logger: Arc<test_utils::TestLogger>
  90 }
  91
  92 impl<'a, 'b, 'c> Drop for Node<'a, 'b, 'c> {
  93         fn drop(&mut self) {
  94                 if !::std::thread::panicking() {
  95                         // Check that we processed all pending events
  96                         assert!(self.node.get_and_clear_pending_msg_events().is_empty());
  97                         assert!(self.node.get_and_clear_pending_events().is_empty());
  98                         assert!(self.chan_monitor.added_monitors.lock().unwrap().is_empty());
  99
 100                         // Check that if we serialize the Router, we can deserialize it again.
 101                         {
 102                                 let mut w = test_utils::TestVecWriter(Vec::new());
 103                                 self.router.write(&mut w).unwrap();
 104                                 let deserialized_router = Router::read(&mut ::std::io::Cursor::new(&w.0), RouterReadArgs {
 105                                         chain_monitor: Arc::clone(&self.chain_monitor) as Arc<chaininterface::ChainWatchInterface>,
 106                                         logger: Arc::clone(&self.logger) as Arc<Logger>
 107                                 }).unwrap();
 108                                 let mut chan_progress = 0;
 109                                 loop {
 110                                         let orig_announcements = self.router.get_next_channel_announcements(chan_progress, 255);
 111                                         let deserialized_announcements = deserialized_router.get_next_channel_announcements(chan_progress, 255);
 112                                         assert!(orig_announcements == deserialized_announcements);
 113                                         chan_progress = match orig_announcements.last() {
 114                                                 Some(announcement) => announcement.0.contents.short_channel_id + 1,
 115                                                 None => break,
 116                                         };
 117                                 }
 118                                 let mut node_progress = None;
 119                                 loop {
 120                                         let orig_announcements = self.router.get_next_node_announcements(node_progress.as_ref(), 255);
 121                                         let deserialized_announcements = deserialized_router.get_next_node_announcements(node_progress.as_ref(), 255);
 122                                         assert!(orig_announcements == deserialized_announcements);
 123                                         node_progress = match orig_announcements.last() {
 124                                                 Some(announcement) => Some(announcement.contents.node_id),
 125                                                 None => break,
 126                                         };
 127                                 }
 128                         }
 129
 130                         // Check that if we serialize and then deserialize all our channel monitors we get the
 131                         // same set of outputs to watch for on chain as we have now. Note that if we write
 132                         // tests that fully close channels and remove the monitors at some point this may break.
 133                         let feeest = test_utils::TestFeeEstimator { sat_per_kw: 253 };
 134                         let mut deserialized_monitors = Vec::new();
 135                         {
 136                                 let old_monitors = self.chan_monitor.simple_monitor.monitors.lock().unwrap();
 137                                 for (_, old_monitor) in old_monitors.iter() {
 138                                         let mut w = test_utils::TestVecWriter(Vec::new());
 139                                         old_monitor.write_for_disk(&mut w).unwrap();
 140                                         let (_, deserialized_monitor) = <(Sha256d, ChannelMonitor<EnforcingChannelKeys>)>::read(
 141                                                 &mut ::std::io::Cursor::new(&w.0), Arc::clone(&self.logger) as Arc<Logger>).unwrap();
 142                                         deserialized_monitors.push(deserialized_monitor);
 143                                 }
 144                         }
 145
 146                         // Before using all the new monitors to check the watch outpoints, use the full set of
 147                         // them to ensure we can write and reload our ChannelManager.
 148                         {
 149                                 let mut channel_monitors = HashMap::new();
 150                                 for monitor in deserialized_monitors.iter_mut() {
 151                                         channel_monitors.insert(monitor.get_funding_txo().unwrap(), monitor);
 152                                 }
 153
 154                                 let mut w = test_utils::TestVecWriter(Vec::new());
 155                                 self.node.write(&mut w).unwrap();
 156                                 <(Sha256d, ChannelManager<EnforcingChannelKeys, &test_utils::TestChannelMonitor, &test_utils::TestBroadcaster, &test_utils::TestKeysInterface, &test_utils::TestFeeEstimator>)>::read(&mut ::std::io::Cursor::new(w.0), ChannelManagerReadArgs {
 157                                         default_config: UserConfig::default(),
 158                                         keys_manager: self.keys_manager,
 159                                         fee_estimator: &test_utils::TestFeeEstimator { sat_per_kw: 253 },
 160                                         monitor: self.chan_monitor,
 161                                         tx_broadcaster: self.tx_broadcaster.clone(),
 162                                         logger: Arc::new(test_utils::TestLogger::new()),
 163                                         channel_monitors: &mut channel_monitors,
 164                                 }).unwrap();
 165                         }
 166
 167                         let chain_watch = Arc::new(chaininterface::ChainWatchInterfaceUtil::new(Network::Testnet, Arc::clone(&self.logger) as Arc<Logger>));
 168                         let channel_monitor = test_utils::TestChannelMonitor::new(chain_watch.clone(), self.tx_broadcaster.clone(), self.logger.clone(), &feeest);
 169                         for deserialized_monitor in deserialized_monitors.drain(..) {
 170                                 if let Err(_) = channel_monitor.add_monitor(deserialized_monitor.get_funding_txo().unwrap(), deserialized_monitor) {
 171                                         panic!();
 172                                 }
 173                         }
 174                         if *chain_watch != *self.chain_monitor {
 175                                 panic!();
 176                         }
 177                 }
 178         }
 179 }
 180
 181 pub fn create_chan_between_nodes<'a, 'b, 'c, 'd>(node_a: &'a Node<'b, 'c, 'd>, node_b: &'a Node<'b, 'c, 'd>, a_flags: InitFeatures, b_flags: InitFeatures) -> (msgs::ChannelAnnouncement, msgs::ChannelUpdate, msgs::ChannelUpdate, [u8; 32], Transaction) {
 182         create_chan_between_nodes_with_value(node_a, node_b, 100000, 10001, a_flags, b_flags)
 183 }
 184
 185 pub fn create_chan_between_nodes_with_value<'a, 'b, 'c, 'd>(node_a: &'a Node<'b, 'c, 'd>, node_b: &'a Node<'b, 'c, 'd>, channel_value: u64, push_msat: u64, a_flags: InitFeatures, b_flags: InitFeatures) -> (msgs::ChannelAnnouncement, msgs::ChannelUpdate, msgs::ChannelUpdate, [u8; 32], Transaction) {
 186         let (funding_locked, channel_id, tx) = create_chan_between_nodes_with_value_a(node_a, node_b, channel_value, push_msat, a_flags, b_flags);
 187         let (announcement, as_update, bs_update) = create_chan_between_nodes_with_value_b(node_a, node_b, &funding_locked);
 188         (announcement, as_update, bs_update, channel_id, tx)
 189 }
 190
 191 macro_rules! get_revoke_commit_msgs {
 192         ($node: expr, $node_id: expr) => {
 193                 {
 194                         let events = $node.node.get_and_clear_pending_msg_events();
 195                         assert_eq!(events.len(), 2);
 196                         (match events[0] {
 197                                 MessageSendEvent::SendRevokeAndACK { ref node_id, ref msg } => {
 198                                         assert_eq!(*node_id, $node_id);
 199                                         (*msg).clone()
 200                                 },
 201                                 _ => panic!("Unexpected event"),
 202                         }, match events[1] {
 203                                 MessageSendEvent::UpdateHTLCs { ref node_id, ref updates } => {
 204                                         assert_eq!(*node_id, $node_id);
 205                                         assert!(updates.update_add_htlcs.is_empty());
 206                                         assert!(updates.update_fulfill_htlcs.is_empty());
 207                                         assert!(updates.update_fail_htlcs.is_empty());
 208                                         assert!(updates.update_fail_malformed_htlcs.is_empty());
 209                                         assert!(updates.update_fee.is_none());
 210                                         updates.commitment_signed.clone()
 211                                 },
 212                                 _ => panic!("Unexpected event"),
 213                         })
 214                 }
 215         }
 216 }
 217
 218 macro_rules! get_event_msg {
 219         ($node: expr, $event_type: path, $node_id: expr) => {
 220                 {
 221                         let events = $node.node.get_and_clear_pending_msg_events();
 222                         assert_eq!(events.len(), 1);
 223                         match events[0] {
 224                                 $event_type { ref node_id, ref msg } => {
 225                                         assert_eq!(*node_id, $node_id);
 226                                         (*msg).clone()
 227                                 },
 228                                 _ => panic!("Unexpected event"),
 229                         }
 230                 }
 231         }
 232 }
 233
 234 macro_rules! get_htlc_update_msgs {
 235         ($node: expr, $node_id: expr) => {
 236                 {
 237                         let events = $node.node.get_and_clear_pending_msg_events();
 238                         assert_eq!(events.len(), 1);
 239                         match events[0] {
 240                                 MessageSendEvent::UpdateHTLCs { ref node_id, ref updates } => {
 241                                         assert_eq!(*node_id, $node_id);
 242                                         (*updates).clone()
 243                                 },
 244                                 _ => panic!("Unexpected event"),
 245                         }
 246                 }
 247         }
 248 }
 249
 250 macro_rules! get_feerate {
 251         ($node: expr, $channel_id: expr) => {
 252                 {
 253                         let chan_lock = $node.node.channel_state.lock().unwrap();
 254                         let chan = chan_lock.by_id.get(&$channel_id).unwrap();
 255                         chan.get_feerate()
 256                 }
 257         }
 258 }
 259
 260 macro_rules! get_local_commitment_txn {
 261         ($node: expr, $channel_id: expr) => {
 262                 {
 263                         let mut monitors = $node.chan_monitor.simple_monitor.monitors.lock().unwrap();
 264                         let mut commitment_txn = None;
 265                         for (funding_txo, monitor) in monitors.iter_mut() {
 266                                 if funding_txo.to_channel_id() == $channel_id {
 267                                         commitment_txn = Some(monitor.get_latest_local_commitment_txn());
 268                                         break;
 269                                 }
 270                         }
 271                         commitment_txn.unwrap()
 272                 }
 273         }
 274 }
 275
 276 pub fn create_funding_transaction<'a, 'b, 'c>(node: &Node<'a, 'b, 'c>, expected_chan_value: u64, expected_user_chan_id: u64) -> ([u8; 32], Transaction, OutPoint) {
 277         let chan_id = *node.network_chan_count.borrow();
 278
 279         let events = node.node.get_and_clear_pending_events();
 280         assert_eq!(events.len(), 1);
 281         match events[0] {
 282                 Event::FundingGenerationReady { ref temporary_channel_id, ref channel_value_satoshis, ref output_script, user_channel_id } => {
 283                         assert_eq!(*channel_value_satoshis, expected_chan_value);
 284                         assert_eq!(user_channel_id, expected_user_chan_id);
 285
 286                         let tx = Transaction { version: chan_id as u32, lock_time: 0, input: Vec::new(), output: vec![TxOut {
 287                                 value: *channel_value_satoshis, script_pubkey: output_script.clone(),
 288                         }]};
 289                         let funding_outpoint = OutPoint::new(tx.txid(), 0);
 290                         (*temporary_channel_id, tx, funding_outpoint)
 291                 },
 292                 _ => panic!("Unexpected event"),
 293         }
 294 }
 295
 296 pub fn create_chan_between_nodes_with_value_init<'a, 'b, 'c>(node_a: &Node<'a, 'b, 'c>, node_b: &Node<'a, 'b, 'c>, channel_value: u64, push_msat: u64, a_flags: InitFeatures, b_flags: InitFeatures) -> Transaction {
 297         node_a.node.create_channel(node_b.node.get_our_node_id(), channel_value, push_msat, 42, None).unwrap();
 298         node_b.node.handle_open_channel(&node_a.node.get_our_node_id(), a_flags, &get_event_msg!(node_a, MessageSendEvent::SendOpenChannel, node_b.node.get_our_node_id()));
 299         node_a.node.handle_accept_channel(&node_b.node.get_our_node_id(), b_flags, &get_event_msg!(node_b, MessageSendEvent::SendAcceptChannel, node_a.node.get_our_node_id()));
 300
 301         let (temporary_channel_id, tx, funding_output) = create_funding_transaction(node_a, channel_value, 42);
 302
 303         {
 304                 node_a.node.funding_transaction_generated(&temporary_channel_id, funding_output);
 305                 let mut added_monitors = node_a.chan_monitor.added_monitors.lock().unwrap();
 306                 assert_eq!(added_monitors.len(), 1);
 307                 assert_eq!(added_monitors[0].0, funding_output);
 308                 added_monitors.clear();
 309         }
 310
 311         node_b.node.handle_funding_created(&node_a.node.get_our_node_id(), &get_event_msg!(node_a, MessageSendEvent::SendFundingCreated, node_b.node.get_our_node_id()));
 312         {
 313                 let mut added_monitors = node_b.chan_monitor.added_monitors.lock().unwrap();
 314                 assert_eq!(added_monitors.len(), 1);
 315                 assert_eq!(added_monitors[0].0, funding_output);
 316                 added_monitors.clear();
 317         }
 318
 319         node_a.node.handle_funding_signed(&node_b.node.get_our_node_id(), &get_event_msg!(node_b, MessageSendEvent::SendFundingSigned, node_a.node.get_our_node_id()));
 320         {
 321                 let mut added_monitors = node_a.chan_monitor.added_monitors.lock().unwrap();
 322                 assert_eq!(added_monitors.len(), 1);
 323                 assert_eq!(added_monitors[0].0, funding_output);
 324                 added_monitors.clear();
 325         }
 326
 327         let events_4 = node_a.node.get_and_clear_pending_events();
 328         assert_eq!(events_4.len(), 1);
 329         match events_4[0] {
 330                 Event::FundingBroadcastSafe { ref funding_txo, user_channel_id } => {
 331                         assert_eq!(user_channel_id, 42);
 332                         assert_eq!(*funding_txo, funding_output);
 333                 },
 334                 _ => panic!("Unexpected event"),
 335         };
 336
 337         tx
 338 }
 339
 340 pub fn create_chan_between_nodes_with_value_confirm_first<'a, 'b, 'c, 'd>(node_recv: &'a Node<'b, 'c, 'c>, node_conf: &'a Node<'b, 'c, 'd>, tx: &Transaction) {
 341         confirm_transaction(&node_conf.block_notifier, &node_conf.chain_monitor, &tx, tx.version);
 342         node_recv.node.handle_funding_locked(&node_conf.node.get_our_node_id(), &get_event_msg!(node_conf, MessageSendEvent::SendFundingLocked, node_recv.node.get_our_node_id()));
 343 }
 344
 345 pub fn create_chan_between_nodes_with_value_confirm_second<'a, 'b, 'c>(node_recv: &Node<'a, 'b, 'c>, node_conf: &Node<'a, 'b, 'c>) -> ((msgs::FundingLocked, msgs::AnnouncementSignatures), [u8; 32]) {
 346         let channel_id;
 347         let events_6 = node_conf.node.get_and_clear_pending_msg_events();
 348         assert_eq!(events_6.len(), 2);
 349         ((match events_6[0] {
 350                 MessageSendEvent::SendFundingLocked { ref node_id, ref msg } => {
 351                         channel_id = msg.channel_id.clone();
 352                         assert_eq!(*node_id, node_recv.node.get_our_node_id());
 353                         msg.clone()
 354                 },
 355                 _ => panic!("Unexpected event"),
 356         }, match events_6[1] {
 357                 MessageSendEvent::SendAnnouncementSignatures { ref node_id, ref msg } => {
 358                         assert_eq!(*node_id, node_recv.node.get_our_node_id());
 359                         msg.clone()
 360                 },
 361                 _ => panic!("Unexpected event"),
 362         }), channel_id)
 363 }
 364
 365 pub fn create_chan_between_nodes_with_value_confirm<'a, 'b, 'c, 'd>(node_a: &'a Node<'b, 'c, 'd>, node_b: &'a Node<'b, 'c, 'd>, tx: &Transaction) -> ((msgs::FundingLocked, msgs::AnnouncementSignatures), [u8; 32]) {
 366         create_chan_between_nodes_with_value_confirm_first(node_a, node_b, tx);
 367         confirm_transaction(&node_a.block_notifier, &node_a.chain_monitor, &tx, tx.version);
 368         create_chan_between_nodes_with_value_confirm_second(node_b, node_a)
 369 }
 370
 371 pub fn create_chan_between_nodes_with_value_a<'a, 'b, 'c, 'd>(node_a: &'a Node<'b, 'c, 'd>, node_b: &'a Node<'b, 'c, 'd>, channel_value: u64, push_msat: u64, a_flags: InitFeatures, b_flags: InitFeatures) -> ((msgs::FundingLocked, msgs::AnnouncementSignatures), [u8; 32], Transaction) {
 372         let tx = create_chan_between_nodes_with_value_init(node_a, node_b, channel_value, push_msat, a_flags, b_flags);
 373         let (msgs, chan_id) = create_chan_between_nodes_with_value_confirm(node_a, node_b, &tx);
 374         (msgs, chan_id, tx)
 375 }
 376
 377 pub fn create_chan_between_nodes_with_value_b<'a, 'b, 'c>(node_a: &Node<'a, 'b, 'c>, node_b: &Node<'a, 'b, 'c>, as_funding_msgs: &(msgs::FundingLocked, msgs::AnnouncementSignatures)) -> (msgs::ChannelAnnouncement, msgs::ChannelUpdate, msgs::ChannelUpdate) {
 378         node_b.node.handle_funding_locked(&node_a.node.get_our_node_id(), &as_funding_msgs.0);
 379         let bs_announcement_sigs = get_event_msg!(node_b, MessageSendEvent::SendAnnouncementSignatures, node_a.node.get_our_node_id());
 380         node_b.node.handle_announcement_signatures(&node_a.node.get_our_node_id(), &as_funding_msgs.1);
 381
 382         let events_7 = node_b.node.get_and_clear_pending_msg_events();
 383         assert_eq!(events_7.len(), 1);
 384         let (announcement, bs_update) = match events_7[0] {
 385                 MessageSendEvent::BroadcastChannelAnnouncement { ref msg, ref update_msg } => {
 386                         (msg, update_msg)
 387                 },
 388                 _ => panic!("Unexpected event"),
 389         };
 390
 391         node_a.node.handle_announcement_signatures(&node_b.node.get_our_node_id(), &bs_announcement_sigs);
 392         let events_8 = node_a.node.get_and_clear_pending_msg_events();
 393         assert_eq!(events_8.len(), 1);
 394         let as_update = match events_8[0] {
 395                 MessageSendEvent::BroadcastChannelAnnouncement { ref msg, ref update_msg } => {
 396                         assert!(*announcement == *msg);
 397                         assert_eq!(update_msg.contents.short_channel_id, announcement.contents.short_channel_id);
 398                         assert_eq!(update_msg.contents.short_channel_id, bs_update.contents.short_channel_id);
 399                         update_msg
 400                 },
 401                 _ => panic!("Unexpected event"),
 402         };
 403
 404         *node_a.network_chan_count.borrow_mut() += 1;
 405
 406         ((*announcement).clone(), (*as_update).clone(), (*bs_update).clone())
 407 }
 408
 409 pub fn create_announced_chan_between_nodes<'a, 'b, 'c, 'd>(nodes: &'a Vec<Node<'b, 'c, 'd>>, a: usize, b: usize, a_flags: InitFeatures, b_flags: InitFeatures) -> (msgs::ChannelUpdate, msgs::ChannelUpdate, [u8; 32], Transaction) {
 410         create_announced_chan_between_nodes_with_value(nodes, a, b, 100000, 10001, a_flags, b_flags)
 411 }
 412
 413 pub fn create_announced_chan_between_nodes_with_value<'a, 'b, 'c, 'd>(nodes: &'a Vec<Node<'b, 'c, 'd>>, a: usize, b: usize, channel_value: u64, push_msat: u64, a_flags: InitFeatures, b_flags: InitFeatures) -> (msgs::ChannelUpdate, msgs::ChannelUpdate, [u8; 32], Transaction) {
 414         let chan_announcement = create_chan_between_nodes_with_value(&nodes[a], &nodes[b], channel_value, push_msat, a_flags, b_flags);
 415
 416         nodes[a].node.broadcast_node_announcement([0, 0, 0], [0; 32], Vec::new());
 417         let a_events = nodes[a].node.get_and_clear_pending_msg_events();
 418         assert_eq!(a_events.len(), 1);
 419         let a_node_announcement = match a_events[0] {
 420                 MessageSendEvent::BroadcastNodeAnnouncement { ref msg } => {
 421                         (*msg).clone()
 422                 },
 423                 _ => panic!("Unexpected event"),
 424         };
 425
 426         nodes[b].node.broadcast_node_announcement([1, 1, 1], [1; 32], Vec::new());
 427         let b_events = nodes[b].node.get_and_clear_pending_msg_events();
 428         assert_eq!(b_events.len(), 1);
 429         let b_node_announcement = match b_events[0] {
 430                 MessageSendEvent::BroadcastNodeAnnouncement { ref msg } => {
 431                         (*msg).clone()
 432                 },
 433                 _ => panic!("Unexpected event"),
 434         };
 435
 436         for node in nodes {
 437                 assert!(node.router.handle_channel_announcement(&chan_announcement.0).unwrap());
 438                 node.router.handle_channel_update(&chan_announcement.1).unwrap();
 439                 node.router.handle_channel_update(&chan_announcement.2).unwrap();
 440                 node.router.handle_node_announcement(&a_node_announcement).unwrap();
 441                 node.router.handle_node_announcement(&b_node_announcement).unwrap();
 442         }
 443         (chan_announcement.1, chan_announcement.2, chan_announcement.3, chan_announcement.4)
 444 }
 445
 446 macro_rules! check_spends {
 447         ($tx: expr, $($spends_txn: expr),*) => {
 448                 {
 449                         $tx.verify(|out_point| {
 450                                 $(
 451                                         if out_point.txid == $spends_txn.txid() {
 452                                                 return $spends_txn.output.get(out_point.vout as usize).cloned()
 453                                         }
 454                                 )*
 455                                 None
 456                         }).unwrap();
 457                 }
 458         }
 459 }
 460
 461 macro_rules! get_closing_signed_broadcast {
 462         ($node: expr, $dest_pubkey: expr) => {
 463                 {
 464                         let events = $node.get_and_clear_pending_msg_events();
 465                         assert!(events.len() == 1 || events.len() == 2);
 466                         (match events[events.len() - 1] {
 467                                 MessageSendEvent::BroadcastChannelUpdate { ref msg } => {
 468                                         assert_eq!(msg.contents.flags & 2, 2);
 469                                         msg.clone()
 470                                 },
 471                                 _ => panic!("Unexpected event"),
 472                         }, if events.len() == 2 {
 473                                 match events[0] {
 474                                         MessageSendEvent::SendClosingSigned { ref node_id, ref msg } => {
 475                                                 assert_eq!(*node_id, $dest_pubkey);
 476                                                 Some(msg.clone())
 477                                         },
 478                                         _ => panic!("Unexpected event"),
 479                                 }
 480                         } else { None })
 481                 }
 482         }
 483 }
 484
 485 macro_rules! check_closed_broadcast {
 486         ($node: expr, $with_error_msg: expr) => {{
 487                 let events = $node.node.get_and_clear_pending_msg_events();
 488                 assert_eq!(events.len(), if $with_error_msg { 2 } else { 1 });
 489                 match events[0] {
 490                         MessageSendEvent::BroadcastChannelUpdate { ref msg } => {
 491                                 assert_eq!(msg.contents.flags & 2, 2);
 492                         },
 493                         _ => panic!("Unexpected event"),
 494                 }
 495                 if $with_error_msg {
 496                         match events[1] {
 497                                 MessageSendEvent::HandleError { action: ErrorAction::SendErrorMessage { ref msg }, node_id: _ } => {
 498                                         // TODO: Check node_id
 499                                         Some(msg.clone())
 500                                 },
 501                                 _ => panic!("Unexpected event"),
 502                         }
 503                 } else { None }
 504         }}
 505 }
 506
 507 pub fn close_channel<'a, 'b, 'c>(outbound_node: &Node<'a, 'b, 'c>, inbound_node: &Node<'a, 'b, 'c>, channel_id: &[u8; 32], funding_tx: Transaction, close_inbound_first: bool) -> (msgs::ChannelUpdate, msgs::ChannelUpdate, Transaction) {
 508         let (node_a, broadcaster_a, struct_a) = if close_inbound_first { (&inbound_node.node, &inbound_node.tx_broadcaster, inbound_node) } else { (&outbound_node.node, &outbound_node.tx_broadcaster, outbound_node) };
 509         let (node_b, broadcaster_b) = if close_inbound_first { (&outbound_node.node, &outbound_node.tx_broadcaster) } else { (&inbound_node.node, &inbound_node.tx_broadcaster) };
 510         let (tx_a, tx_b);
 511
 512         node_a.close_channel(channel_id).unwrap();
 513         node_b.handle_shutdown(&node_a.get_our_node_id(), &get_event_msg!(struct_a, MessageSendEvent::SendShutdown, node_b.get_our_node_id()));
 514
 515         let events_1 = node_b.get_and_clear_pending_msg_events();
 516         assert!(events_1.len() >= 1);
 517         let shutdown_b = match events_1[0] {
 518                 MessageSendEvent::SendShutdown { ref node_id, ref msg } => {
 519                         assert_eq!(node_id, &node_a.get_our_node_id());
 520                         msg.clone()
 521                 },
 522                 _ => panic!("Unexpected event"),
 523         };
 524
 525         let closing_signed_b = if !close_inbound_first {
 526                 assert_eq!(events_1.len(), 1);
 527                 None
 528         } else {
 529                 Some(match events_1[1] {
 530                         MessageSendEvent::SendClosingSigned { ref node_id, ref msg } => {
 531                                 assert_eq!(node_id, &node_a.get_our_node_id());
 532                                 msg.clone()
 533                         },
 534                         _ => panic!("Unexpected event"),
 535                 })
 536         };
 537
 538         node_a.handle_shutdown(&node_b.get_our_node_id(), &shutdown_b);
 539         let (as_update, bs_update) = if close_inbound_first {
 540                 assert!(node_a.get_and_clear_pending_msg_events().is_empty());
 541                 node_a.handle_closing_signed(&node_b.get_our_node_id(), &closing_signed_b.unwrap());
 542                 assert_eq!(broadcaster_a.txn_broadcasted.lock().unwrap().len(), 1);
 543                 tx_a = broadcaster_a.txn_broadcasted.lock().unwrap().remove(0);
 544                 let (as_update, closing_signed_a) = get_closing_signed_broadcast!(node_a, node_b.get_our_node_id());
 545
 546                 node_b.handle_closing_signed(&node_a.get_our_node_id(), &closing_signed_a.unwrap());
 547                 let (bs_update, none_b) = get_closing_signed_broadcast!(node_b, node_a.get_our_node_id());
 548                 assert!(none_b.is_none());
 549                 assert_eq!(broadcaster_b.txn_broadcasted.lock().unwrap().len(), 1);
 550                 tx_b = broadcaster_b.txn_broadcasted.lock().unwrap().remove(0);
 551                 (as_update, bs_update)
 552         } else {
 553                 let closing_signed_a = get_event_msg!(struct_a, MessageSendEvent::SendClosingSigned, node_b.get_our_node_id());
 554
 555                 node_b.handle_closing_signed(&node_a.get_our_node_id(), &closing_signed_a);
 556                 assert_eq!(broadcaster_b.txn_broadcasted.lock().unwrap().len(), 1);
 557                 tx_b = broadcaster_b.txn_broadcasted.lock().unwrap().remove(0);
 558                 let (bs_update, closing_signed_b) = get_closing_signed_broadcast!(node_b, node_a.get_our_node_id());
 559
 560                 node_a.handle_closing_signed(&node_b.get_our_node_id(), &closing_signed_b.unwrap());
 561                 let (as_update, none_a) = get_closing_signed_broadcast!(node_a, node_b.get_our_node_id());
 562                 assert!(none_a.is_none());
 563                 assert_eq!(broadcaster_a.txn_broadcasted.lock().unwrap().len(), 1);
 564                 tx_a = broadcaster_a.txn_broadcasted.lock().unwrap().remove(0);
 565                 (as_update, bs_update)
 566         };
 567         assert_eq!(tx_a, tx_b);
 568         check_spends!(tx_a, funding_tx);
 569
 570         (as_update, bs_update, tx_a)
 571 }
 572
 573 pub struct SendEvent {
 574         pub node_id: PublicKey,
 575         pub msgs: Vec<msgs::UpdateAddHTLC>,
 576         pub commitment_msg: msgs::CommitmentSigned,
 577 }
 578 impl SendEvent {
 579         pub fn from_commitment_update(node_id: PublicKey, updates: msgs::CommitmentUpdate) -> SendEvent {
 580                 assert!(updates.update_fulfill_htlcs.is_empty());
 581                 assert!(updates.update_fail_htlcs.is_empty());
 582                 assert!(updates.update_fail_malformed_htlcs.is_empty());
 583                 assert!(updates.update_fee.is_none());
 584                 SendEvent { node_id: node_id, msgs: updates.update_add_htlcs, commitment_msg: updates.commitment_signed }
 585         }
 586
 587         pub fn from_event(event: MessageSendEvent) -> SendEvent {
 588                 match event {
 589                         MessageSendEvent::UpdateHTLCs { node_id, updates } => SendEvent::from_commitment_update(node_id, updates),
 590                         _ => panic!("Unexpected event type!"),
 591                 }
 592         }
 593
 594         pub fn from_node<'a, 'b, 'c>(node: &Node<'a, 'b, 'c>) -> SendEvent {
 595                 let mut events = node.node.get_and_clear_pending_msg_events();
 596                 assert_eq!(events.len(), 1);
 597                 SendEvent::from_event(events.pop().unwrap())
 598         }
 599 }
 600
 601 macro_rules! check_added_monitors {
 602         ($node: expr, $count: expr) => {
 603                 {
 604                         let mut added_monitors = $node.chan_monitor.added_monitors.lock().unwrap();
 605                         assert_eq!(added_monitors.len(), $count);
 606                         added_monitors.clear();
 607                 }
 608         }
 609 }
 610
 611 macro_rules! commitment_signed_dance {
 612         ($node_a: expr, $node_b: expr, $commitment_signed: expr, $fail_backwards: expr, true /* skip last step */) => {
 613                 {
 614                         check_added_monitors!($node_a, 0);
 615                         assert!($node_a.node.get_and_clear_pending_msg_events().is_empty());
 616                         $node_a.node.handle_commitment_signed(&$node_b.node.get_our_node_id(), &$commitment_signed);
 617                         check_added_monitors!($node_a, 1);
 618                         commitment_signed_dance!($node_a, $node_b, (), $fail_backwards, true, false);
 619                 }
 620         };
 621         ($node_a: expr, $node_b: expr, (), $fail_backwards: expr, true /* skip last step */, true /* return extra message */, true /* return last RAA */) => {
 622                 {
 623                         let (as_revoke_and_ack, as_commitment_signed) = get_revoke_commit_msgs!($node_a, $node_b.node.get_our_node_id());
 624                         check_added_monitors!($node_b, 0);
 625                         assert!($node_b.node.get_and_clear_pending_msg_events().is_empty());
 626                         $node_b.node.handle_revoke_and_ack(&$node_a.node.get_our_node_id(), &as_revoke_and_ack);
 627                         assert!($node_b.node.get_and_clear_pending_msg_events().is_empty());
 628                         check_added_monitors!($node_b, 1);
 629                         $node_b.node.handle_commitment_signed(&$node_a.node.get_our_node_id(), &as_commitment_signed);
 630                         let (bs_revoke_and_ack, extra_msg_option) = {
 631                                 let events = $node_b.node.get_and_clear_pending_msg_events();
 632                                 assert!(events.len() <= 2);
 633                                 (match events[0] {
 634                                         MessageSendEvent::SendRevokeAndACK { ref node_id, ref msg } => {
 635                                                 assert_eq!(*node_id, $node_a.node.get_our_node_id());
 636                                                 (*msg).clone()
 637                                         },
 638                                         _ => panic!("Unexpected event"),
 639                                 }, events.get(1).map(|e| e.clone()))
 640                         };
 641                         check_added_monitors!($node_b, 1);
 642                         if $fail_backwards {
 643                                 assert!($node_a.node.get_and_clear_pending_events().is_empty());
 644                                 assert!($node_a.node.get_and_clear_pending_msg_events().is_empty());
 645                         }
 646                         (extra_msg_option, bs_revoke_and_ack)
 647                 }
 648         };
 649         ($node_a: expr, $node_b: expr, $commitment_signed: expr, $fail_backwards: expr, true /* skip last step */, false /* return extra message */, true /* return last RAA */) => {
 650                 {
 651                         check_added_monitors!($node_a, 0);
 652                         assert!($node_a.node.get_and_clear_pending_msg_events().is_empty());
 653                         $node_a.node.handle_commitment_signed(&$node_b.node.get_our_node_id(), &$commitment_signed);
 654                         check_added_monitors!($node_a, 1);
 655                         let (extra_msg_option, bs_revoke_and_ack) = commitment_signed_dance!($node_a, $node_b, (), $fail_backwards, true, true, true);
 656                         assert!(extra_msg_option.is_none());
 657                         bs_revoke_and_ack
 658                 }
 659         };
 660         ($node_a: expr, $node_b: expr, (), $fail_backwards: expr, true /* skip last step */, true /* return extra message */) => {
 661                 {
 662                         let (extra_msg_option, bs_revoke_and_ack) = commitment_signed_dance!($node_a, $node_b, (), $fail_backwards, true, true, true);
 663                         $node_a.node.handle_revoke_and_ack(&$node_b.node.get_our_node_id(), &bs_revoke_and_ack);
 664                         check_added_monitors!($node_a, 1);
 665                         extra_msg_option
 666                 }
 667         };
 668         ($node_a: expr, $node_b: expr, (), $fail_backwards: expr, true /* skip last step */, false /* no extra message */) => {
 669                 {
 670                         assert!(commitment_signed_dance!($node_a, $node_b, (), $fail_backwards, true, true).is_none());
 671                 }
 672         };
 673         ($node_a: expr, $node_b: expr, $commitment_signed: expr, $fail_backwards: expr) => {
 674                 {
 675                         commitment_signed_dance!($node_a, $node_b, $commitment_signed, $fail_backwards, true);
 676                         if $fail_backwards {
 677                                 expect_pending_htlcs_forwardable!($node_a);
 678                                 check_added_monitors!($node_a, 1);
 679
 680                                 let channel_state = $node_a.node.channel_state.lock().unwrap();
 681                                 assert_eq!(channel_state.pending_msg_events.len(), 1);
 682                                 if let MessageSendEvent::UpdateHTLCs { ref node_id, .. } = channel_state.pending_msg_events[0] {
 683                                         assert_ne!(*node_id, $node_b.node.get_our_node_id());
 684                                 } else { panic!("Unexpected event"); }
 685                         } else {
 686                                 assert!($node_a.node.get_and_clear_pending_msg_events().is_empty());
 687                         }
 688                 }
 689         }
 690 }
 691
 692 macro_rules! get_payment_preimage_hash {
 693         ($node: expr) => {
 694                 {
 695                         let payment_preimage = PaymentPreimage([*$node.network_payment_count.borrow(); 32]);
 696                         *$node.network_payment_count.borrow_mut() += 1;
 697                         let payment_hash = PaymentHash(Sha256::hash(&payment_preimage.0[..]).into_inner());
 698                         (payment_preimage, payment_hash)
 699                 }
 700         }
 701 }
 702
 703 macro_rules! expect_pending_htlcs_forwardable {
 704         ($node: expr) => {{
 705                 let events = $node.node.get_and_clear_pending_events();
 706                 assert_eq!(events.len(), 1);
 707                 match events[0] {
 708                         Event::PendingHTLCsForwardable { .. } => { },
 709                         _ => panic!("Unexpected event"),
 710                 };
 711                 $node.node.process_pending_htlc_forwards();
 712         }}
 713 }
 714
 715 macro_rules! expect_payment_received {
 716         ($node: expr, $expected_payment_hash: expr, $expected_recv_value: expr) => {
 717                 let events = $node.node.get_and_clear_pending_events();
 718                 assert_eq!(events.len(), 1);
 719                 match events[0] {
 720                         Event::PaymentReceived { ref payment_hash, amt } => {
 721                                 assert_eq!($expected_payment_hash, *payment_hash);
 722                                 assert_eq!($expected_recv_value, amt);
 723                         },
 724                         _ => panic!("Unexpected event"),
 725                 }
 726         }
 727 }
 728
 729 macro_rules! expect_payment_sent {
 730         ($node: expr, $expected_payment_preimage: expr) => {
 731                 let events = $node.node.get_and_clear_pending_events();
 732                 assert_eq!(events.len(), 1);
 733                 match events[0] {
 734                         Event::PaymentSent { ref payment_preimage } => {
 735                                 assert_eq!($expected_payment_preimage, *payment_preimage);
 736                         },
 737                         _ => panic!("Unexpected event"),
 738                 }
 739         }
 740 }
 741
 742 macro_rules! expect_payment_failed {
 743         ($node: expr, $expected_payment_hash: expr, $rejected_by_dest: expr) => {
 744                 let events = $node.node.get_and_clear_pending_events();
 745                 assert_eq!(events.len(), 1);
 746                 match events[0] {
 747                         Event::PaymentFailed { ref payment_hash, rejected_by_dest, .. } => {
 748                                 assert_eq!(*payment_hash, $expected_payment_hash);
 749                                 assert_eq!(rejected_by_dest, $rejected_by_dest);
 750                         },
 751                         _ => panic!("Unexpected event"),
 752                 }
 753         }
 754 }
 755
 756 pub fn send_along_route_with_hash<'a, 'b, 'c>(origin_node: &Node<'a, 'b, 'c>, route: Route, expected_route: &[&Node<'a, 'b, 'c>], recv_value: u64, our_payment_hash: PaymentHash) {
 757         let mut payment_event = {
 758                 origin_node.node.send_payment(route, our_payment_hash).unwrap();
 759                 check_added_monitors!(origin_node, 1);
 760
 761                 let mut events = origin_node.node.get_and_clear_pending_msg_events();
 762                 assert_eq!(events.len(), 1);
 763                 SendEvent::from_event(events.remove(0))
 764         };
 765         let mut prev_node = origin_node;
 766
 767         for (idx, &node) in expected_route.iter().enumerate() {
 768                 assert_eq!(node.node.get_our_node_id(), payment_event.node_id);
 769
 770                 node.node.handle_update_add_htlc(&prev_node.node.get_our_node_id(), &payment_event.msgs[0]);
 771                 check_added_monitors!(node, 0);
 772                 commitment_signed_dance!(node, prev_node, payment_event.commitment_msg, false);
 773
 774                 expect_pending_htlcs_forwardable!(node);
 775
 776                 if idx == expected_route.len() - 1 {
 777                         let events_2 = node.node.get_and_clear_pending_events();
 778                         assert_eq!(events_2.len(), 1);
 779                         match events_2[0] {
 780                                 Event::PaymentReceived { ref payment_hash, amt } => {
 781                                         assert_eq!(our_payment_hash, *payment_hash);
 782                                         assert_eq!(amt, recv_value);
 783                                 },
 784                                 _ => panic!("Unexpected event"),
 785                         }
 786                 } else {
 787                         let mut events_2 = node.node.get_and_clear_pending_msg_events();
 788                         assert_eq!(events_2.len(), 1);
 789                         check_added_monitors!(node, 1);
 790                         payment_event = SendEvent::from_event(events_2.remove(0));
 791                         assert_eq!(payment_event.msgs.len(), 1);
 792                 }
 793
 794                 prev_node = node;
 795         }
 796 }
 797
 798 pub fn send_along_route<'a, 'b, 'c>(origin_node: &Node<'a, 'b, 'c>, route: Route, expected_route: &[&Node<'a, 'b, 'c>], recv_value: u64) -> (PaymentPreimage, PaymentHash) {
 799         let (our_payment_preimage, our_payment_hash) = get_payment_preimage_hash!(origin_node);
 800         send_along_route_with_hash(origin_node, route, expected_route, recv_value, our_payment_hash);
 801         (our_payment_preimage, our_payment_hash)
 802 }
 803
 804 pub fn claim_payment_along_route<'a, 'b, 'c>(origin_node: &Node<'a, 'b, 'c>, expected_route: &[&Node<'a, 'b, 'c>], skip_last: bool, our_payment_preimage: PaymentPreimage, expected_amount: u64) {
 805         assert!(expected_route.last().unwrap().node.claim_funds(our_payment_preimage, expected_amount));
 806         check_added_monitors!(expected_route.last().unwrap(), 1);
 807
 808         let mut next_msgs: Option<(msgs::UpdateFulfillHTLC, msgs::CommitmentSigned)> = None;
 809         let mut expected_next_node = expected_route.last().unwrap().node.get_our_node_id();
 810         macro_rules! get_next_msgs {
 811                 ($node: expr) => {
 812                         {
 813                                 let events = $node.node.get_and_clear_pending_msg_events();
 814                                 assert_eq!(events.len(), 1);
 815                                 match events[0] {
 816                                         MessageSendEvent::UpdateHTLCs { ref node_id, updates: msgs::CommitmentUpdate { ref update_add_htlcs, ref update_fulfill_htlcs, ref update_fail_htlcs, ref update_fail_malformed_htlcs, ref update_fee, ref commitment_signed } } => {
 817                                                 assert!(update_add_htlcs.is_empty());
 818                                                 assert_eq!(update_fulfill_htlcs.len(), 1);
 819                                                 assert!(update_fail_htlcs.is_empty());
 820                                                 assert!(update_fail_malformed_htlcs.is_empty());
 821                                                 assert!(update_fee.is_none());
 822                                                 expected_next_node = node_id.clone();
 823                                                 Some((update_fulfill_htlcs[0].clone(), commitment_signed.clone()))
 824                                         },
 825                                         _ => panic!("Unexpected event"),
 826                                 }
 827                         }
 828                 }
 829         }
 830
 831         macro_rules! last_update_fulfill_dance {
 832                 ($node: expr, $prev_node: expr) => {
 833                         {
 834                                 $node.node.handle_update_fulfill_htlc(&$prev_node.node.get_our_node_id(), &next_msgs.as_ref().unwrap().0);
 835                                 check_added_monitors!($node, 0);
 836                                 assert!($node.node.get_and_clear_pending_msg_events().is_empty());
 837                                 commitment_signed_dance!($node, $prev_node, next_msgs.as_ref().unwrap().1, false);
 838                         }
 839                 }
 840         }
 841         macro_rules! mid_update_fulfill_dance {
 842                 ($node: expr, $prev_node: expr, $new_msgs: expr) => {
 843                         {
 844                                 $node.node.handle_update_fulfill_htlc(&$prev_node.node.get_our_node_id(), &next_msgs.as_ref().unwrap().0);
 845                                 check_added_monitors!($node, 1);
 846                                 let new_next_msgs = if $new_msgs {
 847                                         get_next_msgs!($node)
 848                                 } else {
 849                                         assert!($node.node.get_and_clear_pending_msg_events().is_empty());
 850                                         None
 851                                 };
 852                                 commitment_signed_dance!($node, $prev_node, next_msgs.as_ref().unwrap().1, false);
 853                                 next_msgs = new_next_msgs;
 854                         }
 855                 }
 856         }
 857
 858         let mut prev_node = expected_route.last().unwrap();
 859         for (idx, node) in expected_route.iter().rev().enumerate() {
 860                 assert_eq!(expected_next_node, node.node.get_our_node_id());
 861                 let update_next_msgs = !skip_last || idx != expected_route.len() - 1;
 862                 if next_msgs.is_some() {
 863                         mid_update_fulfill_dance!(node, prev_node, update_next_msgs);
 864                 } else if update_next_msgs {
 865                         next_msgs = get_next_msgs!(node);
 866                 } else {
 867                         assert!(node.node.get_and_clear_pending_msg_events().is_empty());
 868                 }
 869                 if !skip_last && idx == expected_route.len() - 1 {
 870                         assert_eq!(expected_next_node, origin_node.node.get_our_node_id());
 871                 }
 872
 873                 prev_node = node;
 874         }
 875
 876         if !skip_last {
 877                 last_update_fulfill_dance!(origin_node, expected_route.first().unwrap());
 878                 expect_payment_sent!(origin_node, our_payment_preimage);
 879         }
 880 }
 881
 882 pub fn claim_payment<'a, 'b, 'c>(origin_node: &Node<'a, 'b, 'c>, expected_route: &[&Node<'a, 'b, 'c>], our_payment_preimage: PaymentPreimage, expected_amount: u64) {
 883         claim_payment_along_route(origin_node, expected_route, false, our_payment_preimage, expected_amount);
 884 }
 885
 886 pub const TEST_FINAL_CLTV: u32 = 32;
 887
 888 pub fn route_payment<'a, 'b, 'c>(origin_node: &Node<'a, 'b, 'c>, expected_route: &[&Node<'a, 'b, 'c>], recv_value: u64) -> (PaymentPreimage, PaymentHash) {
 889         let route = origin_node.router.get_route(&expected_route.last().unwrap().node.get_our_node_id(), None, &Vec::new(), recv_value, TEST_FINAL_CLTV).unwrap();
 890         assert_eq!(route.hops.len(), expected_route.len());
 891         for (node, hop) in expected_route.iter().zip(route.hops.iter()) {
 892                 assert_eq!(hop.pubkey, node.node.get_our_node_id());
 893         }
 894
 895         send_along_route(origin_node, route, expected_route, recv_value)
 896 }
 897
 898 pub fn route_over_limit<'a, 'b, 'c>(origin_node: &Node<'a, 'b, 'c>, expected_route: &[&Node<'a, 'b, 'c>], recv_value: u64)  {
 899         let route = origin_node.router.get_route(&expected_route.last().unwrap().node.get_our_node_id(), None, &Vec::new(), recv_value, TEST_FINAL_CLTV).unwrap();
 900         assert_eq!(route.hops.len(), expected_route.len());
 901         for (node, hop) in expected_route.iter().zip(route.hops.iter()) {
 902                 assert_eq!(hop.pubkey, node.node.get_our_node_id());
 903         }
 904
 905         let (_, our_payment_hash) = get_payment_preimage_hash!(origin_node);
 906
 907         let err = origin_node.node.send_payment(route, our_payment_hash).err().unwrap();
 908         match err {
 909                 APIError::ChannelUnavailable{err} => assert_eq!(err, "Cannot send value that would put us over the max HTLC value in flight our peer will accept"),
 910                 _ => panic!("Unknown error variants"),
 911         };
 912 }
 913
 914 pub fn send_payment<'a, 'b, 'c>(origin: &Node<'a, 'b, 'c>, expected_route: &[&Node<'a, 'b, 'c>], recv_value: u64, expected_value: u64)  {
 915         let our_payment_preimage = route_payment(&origin, expected_route, recv_value).0;
 916         claim_payment(&origin, expected_route, our_payment_preimage, expected_value);
 917 }
 918
 919 pub fn fail_payment_along_route<'a, 'b, 'c>(origin_node: &Node<'a, 'b, 'c>, expected_route: &[&Node<'a, 'b, 'c>], skip_last: bool, our_payment_hash: PaymentHash)  {
 920         assert!(expected_route.last().unwrap().node.fail_htlc_backwards(&our_payment_hash));
 921         expect_pending_htlcs_forwardable!(expected_route.last().unwrap());
 922         check_added_monitors!(expected_route.last().unwrap(), 1);
 923
 924         let mut next_msgs: Option<(msgs::UpdateFailHTLC, msgs::CommitmentSigned)> = None;
 925         macro_rules! update_fail_dance {
 926                 ($node: expr, $prev_node: expr, $last_node: expr) => {
 927                         {
 928                                 $node.node.handle_update_fail_htlc(&$prev_node.node.get_our_node_id(), &next_msgs.as_ref().unwrap().0);
 929                                 commitment_signed_dance!($node, $prev_node, next_msgs.as_ref().unwrap().1, !$last_node);
 930                                 if skip_last && $last_node {
 931                                         expect_pending_htlcs_forwardable!($node);
 932                                 }
 933                         }
 934                 }
 935         }
 936
 937         let mut expected_next_node = expected_route.last().unwrap().node.get_our_node_id();
 938         let mut prev_node = expected_route.last().unwrap();
 939         for (idx, node) in expected_route.iter().rev().enumerate() {
 940                 assert_eq!(expected_next_node, node.node.get_our_node_id());
 941                 if next_msgs.is_some() {
 942                         // We may be the "last node" for the purpose of the commitment dance if we're
 943                         // skipping the last node (implying it is disconnected) and we're the
 944                         // second-to-last node!
 945                         update_fail_dance!(node, prev_node, skip_last && idx == expected_route.len() - 1);
 946                 }
 947
 948                 let events = node.node.get_and_clear_pending_msg_events();
 949                 if !skip_last || idx != expected_route.len() - 1 {
 950                         assert_eq!(events.len(), 1);
 951                         match events[0] {
 952                                 MessageSendEvent::UpdateHTLCs { ref node_id, updates: msgs::CommitmentUpdate { ref update_add_htlcs, ref update_fulfill_htlcs, ref update_fail_htlcs, ref update_fail_malformed_htlcs, ref update_fee, ref commitment_signed } } => {
 953                                         assert!(update_add_htlcs.is_empty());
 954                                         assert!(update_fulfill_htlcs.is_empty());
 955                                         assert_eq!(update_fail_htlcs.len(), 1);
 956                                         assert!(update_fail_malformed_htlcs.is_empty());
 957                                         assert!(update_fee.is_none());
 958                                         expected_next_node = node_id.clone();
 959                                         next_msgs = Some((update_fail_htlcs[0].clone(), commitment_signed.clone()));
 960                                 },
 961                                 _ => panic!("Unexpected event"),
 962                         }
 963                 } else {
 964                         assert!(events.is_empty());
 965                 }
 966                 if !skip_last && idx == expected_route.len() - 1 {
 967                         assert_eq!(expected_next_node, origin_node.node.get_our_node_id());
 968                 }
 969
 970                 prev_node = node;
 971         }
 972
 973         if !skip_last {
 974                 update_fail_dance!(origin_node, expected_route.first().unwrap(), true);
 975
 976                 let events = origin_node.node.get_and_clear_pending_events();
 977                 assert_eq!(events.len(), 1);
 978                 match events[0] {
 979                         Event::PaymentFailed { payment_hash, rejected_by_dest, .. } => {
 980                                 assert_eq!(payment_hash, our_payment_hash);
 981                                 assert!(rejected_by_dest);
 982                         },
 983                         _ => panic!("Unexpected event"),
 984                 }
 985         }
 986 }
 987
 988 pub fn fail_payment<'a, 'b, 'c>(origin_node: &Node<'a, 'b, 'c>, expected_route: &[&Node<'a, 'b, 'c>], our_payment_hash: PaymentHash)  {
 989         fail_payment_along_route(origin_node, expected_route, false, our_payment_hash);
 990 }
 991
 992 pub fn create_chanmon_cfgs(node_count: usize) -> Vec<TestChanMonCfg> {
 993         let mut chan_mon_cfgs = Vec::new();
 994         for _ in 0..node_count {
 995                 let tx_broadcaster = test_utils::TestBroadcaster{txn_broadcasted: Mutex::new(Vec::new())};
 996                 let fee_estimator = test_utils::TestFeeEstimator { sat_per_kw: 253 };
 997                 chan_mon_cfgs.push(TestChanMonCfg{ tx_broadcaster, fee_estimator });
 998         }
 999
1000         chan_mon_cfgs
1001 }
1002
1003 pub fn create_node_cfgs<'a>(node_count: usize, chanmon_cfgs: &'a Vec<TestChanMonCfg>) -> Vec<NodeCfg<'a>> {
1004         let mut nodes = Vec::new();
1005         let mut rng = thread_rng();
1006
1007         for i in 0..node_count {
1008                 let logger = Arc::new(test_utils::TestLogger::with_id(format!("node {}", i)));
1009                 let chain_monitor = Arc::new(chaininterface::ChainWatchInterfaceUtil::new(Network::Testnet, logger.clone() as Arc<Logger>));
1010                 let mut seed = [0; 32];
1011                 rng.fill_bytes(&mut seed);
1012                 let keys_manager = test_utils::TestKeysInterface::new(&seed, Network::Testnet, logger.clone() as Arc<Logger>);
1013                 let chan_monitor = test_utils::TestChannelMonitor::new(chain_monitor.clone(), &chanmon_cfgs[i].tx_broadcaster, logger.clone(), &chanmon_cfgs[i].fee_estimator);
1014                 nodes.push(NodeCfg { chain_monitor, logger, tx_broadcaster: &chanmon_cfgs[i].tx_broadcaster, fee_estimator: &chanmon_cfgs[i].fee_estimator, chan_monitor, keys_manager, node_seed: seed });
1015         }
1016
1017         nodes
1018 }
1019
1020 pub fn create_node_chanmgrs<'a, 'b>(node_count: usize, cfgs: &'a Vec<NodeCfg<'b>>, node_config: &[Option<UserConfig>]) -> Vec<ChannelManager<EnforcingChannelKeys, &'a TestChannelMonitor<'b>, &'b test_utils::TestBroadcaster, &'a test_utils::TestKeysInterface, &'b test_utils::TestFeeEstimator>> {
1021         let mut chanmgrs = Vec::new();
1022         for i in 0..node_count {
1023                 let mut default_config = UserConfig::default();
1024                 default_config.channel_options.announced_channel = true;
1025                 default_config.peer_channel_config_limits.force_announced_channel_preference = false;
1026                 default_config.own_channel_config.our_htlc_minimum_msat = 1000; // sanitization being done by the sender, to exerce receiver logic we need to lift of limit
1027                 let node = ChannelManager::new(Network::Testnet, cfgs[i].fee_estimator, &cfgs[i].chan_monitor, cfgs[i].tx_broadcaster, cfgs[i].logger.clone(), &cfgs[i].keys_manager, if node_config[i].is_some() { node_config[i].clone().unwrap() } else { default_config }, 0).unwrap();
1028                 chanmgrs.push(node);
1029         }
1030
1031         chanmgrs
1032 }
1033
1034 pub fn create_network<'a, 'b: 'a, 'c: 'b>(node_count: usize, cfgs: &'b Vec<NodeCfg<'c>>, chan_mgrs: &'a Vec<ChannelManager<EnforcingChannelKeys, &'b TestChannelMonitor<'c>, &'c test_utils::TestBroadcaster, &'b test_utils::TestKeysInterface, &'c test_utils::TestFeeEstimator>>) -> Vec<Node<'a, 'b, 'c>> {
1035         let secp_ctx = Secp256k1::new();
1036         let mut nodes = Vec::new();
1037         let chan_count = Rc::new(RefCell::new(0));
1038         let payment_count = Rc::new(RefCell::new(0));
1039
1040         for i in 0..node_count {
1041                 let block_notifier = chaininterface::BlockNotifier::new(cfgs[i].chain_monitor.clone());
1042                 block_notifier.register_listener(&cfgs[i].chan_monitor.simple_monitor as &chaininterface::ChainListener);
1043                 block_notifier.register_listener(&chan_mgrs[i] as &chaininterface::ChainListener);
1044                 let router = Router::new(PublicKey::from_secret_key(&secp_ctx, &cfgs[i].keys_manager.get_node_secret()), cfgs[i].chain_monitor.clone(), cfgs[i].logger.clone() as Arc<Logger>);
1045                 nodes.push(Node{ chain_monitor: cfgs[i].chain_monitor.clone(), block_notifier,
1046                                                                                  tx_broadcaster: cfgs[i].tx_broadcaster, chan_monitor: &cfgs[i].chan_monitor,
1047                                                                                  keys_manager: &cfgs[i].keys_manager, node: &chan_mgrs[i], router,
1048                                                                                  node_seed: cfgs[i].node_seed, network_chan_count: chan_count.clone(),
1049                                                                                  network_payment_count: payment_count.clone(), logger: cfgs[i].logger.clone(),
1050                 })
1051         }
1052
1053         nodes
1054 }
1055
1056 pub const ACCEPTED_HTLC_SCRIPT_WEIGHT: usize = 138; //Here we have a diff due to HTLC CLTV expiry being < 2^15 in test
1057 pub const OFFERED_HTLC_SCRIPT_WEIGHT: usize = 133;
1058
1059 #[derive(PartialEq)]
1060 pub enum HTLCType { NONE, TIMEOUT, SUCCESS }
1061 /// Tests that the given node has broadcast transactions for the given Channel
1062 ///
1063 /// First checks that the latest local commitment tx has been broadcast, unless an explicit
1064 /// commitment_tx is provided, which may be used to test that a remote commitment tx was
1065 /// broadcast and the revoked outputs were claimed.
1066 ///
1067 /// Next tests that there is (or is not) a transaction that spends the commitment transaction
1068 /// that appears to be the type of HTLC transaction specified in has_htlc_tx.
1069 ///
1070 /// All broadcast transactions must be accounted for in one of the above three types of we'll
1071 /// also fail.
1072 pub fn test_txn_broadcast<'a, 'b, 'c>(node: &Node<'a, 'b, 'c>, chan: &(msgs::ChannelUpdate, msgs::ChannelUpdate, [u8; 32], Transaction), commitment_tx: Option<Transaction>, has_htlc_tx: HTLCType) -> Vec<Transaction>  {
1073         let mut node_txn = node.tx_broadcaster.txn_broadcasted.lock().unwrap();
1074         assert!(node_txn.len() >= if commitment_tx.is_some() { 0 } else { 1 } + if has_htlc_tx == HTLCType::NONE { 0 } else { 1 });
1075
1076         let mut res = Vec::with_capacity(2);
1077         node_txn.retain(|tx| {
1078                 if tx.input.len() == 1 && tx.input[0].previous_output.txid == chan.3.txid() {
1079                         check_spends!(tx, chan.3);
1080                         if commitment_tx.is_none() {
1081                                 res.push(tx.clone());
1082                         }
1083                         false
1084                 } else { true }
1085         });
1086         if let Some(explicit_tx) = commitment_tx {
1087                 res.push(explicit_tx.clone());
1088         }
1089
1090         assert_eq!(res.len(), 1);
1091
1092         if has_htlc_tx != HTLCType::NONE {
1093                 node_txn.retain(|tx| {
1094                         if tx.input.len() == 1 && tx.input[0].previous_output.txid == res[0].txid() {
1095                                 check_spends!(tx, res[0]);
1096                                 if has_htlc_tx == HTLCType::TIMEOUT {
1097                                         assert!(tx.lock_time != 0);
1098                                 } else {
1099                                         assert!(tx.lock_time == 0);
1100                                 }
1101                                 res.push(tx.clone());
1102                                 false
1103                         } else { true }
1104                 });
1105                 assert!(res.len() == 2 || res.len() == 3);
1106                 if res.len() == 3 {
1107                         assert_eq!(res[1], res[2]);
1108                 }
1109         }
1110
1111         assert!(node_txn.is_empty());
1112         res
1113 }
1114
1115 /// Tests that the given node has broadcast a claim transaction against the provided revoked
1116 /// HTLC transaction.
1117 pub fn test_revoked_htlc_claim_txn_broadcast<'a, 'b, 'c>(node: &Node<'a, 'b, 'c>, revoked_tx: Transaction, commitment_revoked_tx: Transaction)  {
1118         let mut node_txn = node.tx_broadcaster.txn_broadcasted.lock().unwrap();
1119         // We may issue multiple claiming transaction on revoked outputs due to block rescan
1120         // for revoked htlc outputs
1121         if node_txn.len() != 1 && node_txn.len() != 2 && node_txn.len() != 3 { assert!(false); }
1122         node_txn.retain(|tx| {
1123                 if tx.input.len() == 1 && tx.input[0].previous_output.txid == revoked_tx.txid() {
1124                         check_spends!(tx, revoked_tx);
1125                         false
1126                 } else { true }
1127         });
1128         node_txn.retain(|tx| {
1129                 check_spends!(tx, commitment_revoked_tx);
1130                 false
1131         });
1132         assert!(node_txn.is_empty());
1133 }
1134
1135 pub fn check_preimage_claim<'a, 'b, 'c>(node: &Node<'a, 'b, 'c>, prev_txn: &Vec<Transaction>) -> Vec<Transaction>  {
1136         let mut node_txn = node.tx_broadcaster.txn_broadcasted.lock().unwrap();
1137
1138         assert!(node_txn.len() >= 1);
1139         assert_eq!(node_txn[0].input.len(), 1);
1140         let mut found_prev = false;
1141
1142         for tx in prev_txn {
1143                 if node_txn[0].input[0].previous_output.txid == tx.txid() {
1144                         check_spends!(node_txn[0], tx);
1145                         assert!(node_txn[0].input[0].witness[2].len() > 106); // must spend an htlc output
1146                         assert_eq!(tx.input.len(), 1); // must spend a commitment tx
1147
1148                         found_prev = true;
1149                         break;
1150                 }
1151         }
1152         assert!(found_prev);
1153
1154         let mut res = Vec::new();
1155         mem::swap(&mut *node_txn, &mut res);
1156         res
1157 }
1158
1159 pub fn get_announce_close_broadcast_events<'a, 'b, 'c>(nodes: &Vec<Node<'a, 'b, 'c>>, a: usize, b: usize)  {
1160         let events_1 = nodes[a].node.get_and_clear_pending_msg_events();
1161         assert_eq!(events_1.len(), 1);
1162         let as_update = match events_1[0] {
1163                 MessageSendEvent::BroadcastChannelUpdate { ref msg } => {
1164                         msg.clone()
1165                 },
1166                 _ => panic!("Unexpected event"),
1167         };
1168
1169         let events_2 = nodes[b].node.get_and_clear_pending_msg_events();
1170         assert_eq!(events_2.len(), 1);
1171         let bs_update = match events_2[0] {
1172                 MessageSendEvent::BroadcastChannelUpdate { ref msg } => {
1173                         msg.clone()
1174                 },
1175                 _ => panic!("Unexpected event"),
1176         };
1177
1178         for node in nodes {
1179                 node.router.handle_channel_update(&as_update).unwrap();
1180                 node.router.handle_channel_update(&bs_update).unwrap();
1181         }
1182 }
1183
1184 macro_rules! get_channel_value_stat {
1185         ($node: expr, $channel_id: expr) => {{
1186                 let chan_lock = $node.node.channel_state.lock().unwrap();
1187                 let chan = chan_lock.by_id.get(&$channel_id).unwrap();
1188                 chan.get_value_stat()
1189         }}
1190 }
1191
1192 macro_rules! get_chan_reestablish_msgs {
1193         ($src_node: expr, $dst_node: expr) => {
1194                 {
1195                         let mut res = Vec::with_capacity(1);
1196                         for msg in $src_node.node.get_and_clear_pending_msg_events() {
1197                                 if let MessageSendEvent::SendChannelReestablish { ref node_id, ref msg } = msg {
1198                                         assert_eq!(*node_id, $dst_node.node.get_our_node_id());
1199                                         res.push(msg.clone());
1200                                 } else {
1201                                         panic!("Unexpected event")
1202                                 }
1203                         }
1204                         res
1205                 }
1206         }
1207 }
1208
1209 macro_rules! handle_chan_reestablish_msgs {
1210         ($src_node: expr, $dst_node: expr) => {
1211                 {
1212                         let msg_events = $src_node.node.get_and_clear_pending_msg_events();
1213                         let mut idx = 0;
1214                         let funding_locked = if let Some(&MessageSendEvent::SendFundingLocked { ref node_id, ref msg }) = msg_events.get(0) {
1215                                 idx += 1;
1216                                 assert_eq!(*node_id, $dst_node.node.get_our_node_id());
1217                                 Some(msg.clone())
1218                         } else {
1219                                 None
1220                         };
1221
1222                         let mut revoke_and_ack = None;
1223                         let mut commitment_update = None;
1224                         let order = if let Some(ev) = msg_events.get(idx) {
1225                                 idx += 1;
1226                                 match ev {
1227                                         &MessageSendEvent::SendRevokeAndACK { ref node_id, ref msg } => {
1228                                                 assert_eq!(*node_id, $dst_node.node.get_our_node_id());
1229                                                 revoke_and_ack = Some(msg.clone());
1230                                                 RAACommitmentOrder::RevokeAndACKFirst
1231                                         },
1232                                         &MessageSendEvent::UpdateHTLCs { ref node_id, ref updates } => {
1233                                                 assert_eq!(*node_id, $dst_node.node.get_our_node_id());
1234                                                 commitment_update = Some(updates.clone());
1235                                                 RAACommitmentOrder::CommitmentFirst
1236                                         },
1237                                         _ => panic!("Unexpected event"),
1238                                 }
1239                         } else {
1240                                 RAACommitmentOrder::CommitmentFirst
1241                         };
1242
1243                         if let Some(ev) = msg_events.get(idx) {
1244                                 match ev {
1245                                         &MessageSendEvent::SendRevokeAndACK { ref node_id, ref msg } => {
1246                                                 assert_eq!(*node_id, $dst_node.node.get_our_node_id());
1247                                                 assert!(revoke_and_ack.is_none());
1248                                                 revoke_and_ack = Some(msg.clone());
1249                                         },
1250                                         &MessageSendEvent::UpdateHTLCs { ref node_id, ref updates } => {
1251                                                 assert_eq!(*node_id, $dst_node.node.get_our_node_id());
1252                                                 assert!(commitment_update.is_none());
1253                                                 commitment_update = Some(updates.clone());
1254                                         },
1255                                         _ => panic!("Unexpected event"),
1256                                 }
1257                         }
1258
1259                         (funding_locked, revoke_and_ack, commitment_update, order)
1260                 }
1261         }
1262 }
1263
1264 /// pending_htlc_adds includes both the holding cell and in-flight update_add_htlcs, whereas
1265 /// for claims/fails they are separated out.
1266 pub fn reconnect_nodes<'a, 'b, 'c>(node_a: &Node<'a, 'b, 'c>, node_b: &Node<'a, 'b, 'c>, send_funding_locked: (bool, bool), pending_htlc_adds: (i64, i64), pending_htlc_claims: (usize, usize), pending_cell_htlc_claims: (usize, usize), pending_cell_htlc_fails: (usize, usize), pending_raa: (bool, bool))  {
1267         node_a.node.peer_connected(&node_b.node.get_our_node_id(), &msgs::Init { features: InitFeatures::empty() });
1268         let reestablish_1 = get_chan_reestablish_msgs!(node_a, node_b);
1269         node_b.node.peer_connected(&node_a.node.get_our_node_id(), &msgs::Init { features: InitFeatures::empty() });
1270         let reestablish_2 = get_chan_reestablish_msgs!(node_b, node_a);
1271
1272         if send_funding_locked.0 {
1273                 // If a expects a funding_locked, it better not think it has received a revoke_and_ack
1274                 // from b
1275                 for reestablish in reestablish_1.iter() {
1276                         assert_eq!(reestablish.next_remote_commitment_number, 0);
1277                 }
1278         }
1279         if send_funding_locked.1 {
1280                 // If b expects a funding_locked, it better not think it has received a revoke_and_ack
1281                 // from a
1282                 for reestablish in reestablish_2.iter() {
1283                         assert_eq!(reestablish.next_remote_commitment_number, 0);
1284                 }
1285         }
1286         if send_funding_locked.0 || send_funding_locked.1 {
1287                 // If we expect any funding_locked's, both sides better have set
1288                 // next_local_commitment_number to 1
1289                 for reestablish in reestablish_1.iter() {
1290                         assert_eq!(reestablish.next_local_commitment_number, 1);
1291                 }
1292                 for reestablish in reestablish_2.iter() {
1293                         assert_eq!(reestablish.next_local_commitment_number, 1);
1294                 }
1295         }
1296
1297         let mut resp_1 = Vec::new();
1298         for msg in reestablish_1 {
1299                 node_b.node.handle_channel_reestablish(&node_a.node.get_our_node_id(), &msg);
1300                 resp_1.push(handle_chan_reestablish_msgs!(node_b, node_a));
1301         }
1302         if pending_cell_htlc_claims.0 != 0 || pending_cell_htlc_fails.0 != 0 {
1303                 check_added_monitors!(node_b, 1);
1304         } else {
1305                 check_added_monitors!(node_b, 0);
1306         }
1307
1308         let mut resp_2 = Vec::new();
1309         for msg in reestablish_2 {
1310                 node_a.node.handle_channel_reestablish(&node_b.node.get_our_node_id(), &msg);
1311                 resp_2.push(handle_chan_reestablish_msgs!(node_a, node_b));
1312         }
1313         if pending_cell_htlc_claims.1 != 0 || pending_cell_htlc_fails.1 != 0 {
1314                 check_added_monitors!(node_a, 1);
1315         } else {
1316                 check_added_monitors!(node_a, 0);
1317         }
1318
1319         // We don't yet support both needing updates, as that would require a different commitment dance:
1320         assert!((pending_htlc_adds.0 == 0 && pending_htlc_claims.0 == 0 && pending_cell_htlc_claims.0 == 0 && pending_cell_htlc_fails.0 == 0) ||
1321                         (pending_htlc_adds.1 == 0 && pending_htlc_claims.1 == 0 && pending_cell_htlc_claims.1 == 0 && pending_cell_htlc_fails.1 == 0));
1322
1323         for chan_msgs in resp_1.drain(..) {
1324                 if send_funding_locked.0 {
1325                         node_a.node.handle_funding_locked(&node_b.node.get_our_node_id(), &chan_msgs.0.unwrap());
1326                         let announcement_event = node_a.node.get_and_clear_pending_msg_events();
1327                         if !announcement_event.is_empty() {
1328                                 assert_eq!(announcement_event.len(), 1);
1329                                 if let MessageSendEvent::SendAnnouncementSignatures { .. } = announcement_event[0] {
1330                                         //TODO: Test announcement_sigs re-sending
1331                                 } else { panic!("Unexpected event!"); }
1332                         }
1333                 } else {
1334                         assert!(chan_msgs.0.is_none());
1335                 }
1336                 if pending_raa.0 {
1337                         assert!(chan_msgs.3 == RAACommitmentOrder::RevokeAndACKFirst);
1338                         node_a.node.handle_revoke_and_ack(&node_b.node.get_our_node_id(), &chan_msgs.1.unwrap());
1339                         assert!(node_a.node.get_and_clear_pending_msg_events().is_empty());
1340                         check_added_monitors!(node_a, 1);
1341                 } else {
1342                         assert!(chan_msgs.1.is_none());
1343                 }
1344                 if pending_htlc_adds.0 != 0 || pending_htlc_claims.0 != 0 || pending_cell_htlc_claims.0 != 0 || pending_cell_htlc_fails.0 != 0 {
1345                         let commitment_update = chan_msgs.2.unwrap();
1346                         if pending_htlc_adds.0 != -1 { // We use -1 to denote a response commitment_signed
1347                                 assert_eq!(commitment_update.update_add_htlcs.len(), pending_htlc_adds.0 as usize);
1348                         } else {
1349                                 assert!(commitment_update.update_add_htlcs.is_empty());
1350                         }
1351                         assert_eq!(commitment_update.update_fulfill_htlcs.len(), pending_htlc_claims.0 + pending_cell_htlc_claims.0);
1352                         assert_eq!(commitment_update.update_fail_htlcs.len(), pending_cell_htlc_fails.0);
1353                         assert!(commitment_update.update_fail_malformed_htlcs.is_empty());
1354                         for update_add in commitment_update.update_add_htlcs {
1355                                 node_a.node.handle_update_add_htlc(&node_b.node.get_our_node_id(), &update_add);
1356                         }
1357                         for update_fulfill in commitment_update.update_fulfill_htlcs {
1358                                 node_a.node.handle_update_fulfill_htlc(&node_b.node.get_our_node_id(), &update_fulfill);
1359                         }
1360                         for update_fail in commitment_update.update_fail_htlcs {
1361                                 node_a.node.handle_update_fail_htlc(&node_b.node.get_our_node_id(), &update_fail);
1362                         }
1363
1364                         if pending_htlc_adds.0 != -1 { // We use -1 to denote a response commitment_signed
1365                                 commitment_signed_dance!(node_a, node_b, commitment_update.commitment_signed, false);
1366                         } else {
1367                                 node_a.node.handle_commitment_signed(&node_b.node.get_our_node_id(), &commitment_update.commitment_signed);
1368                                 check_added_monitors!(node_a, 1);
1369                                 let as_revoke_and_ack = get_event_msg!(node_a, MessageSendEvent::SendRevokeAndACK, node_b.node.get_our_node_id());
1370                                 // No commitment_signed so get_event_msg's assert(len == 1) passes
1371                                 node_b.node.handle_revoke_and_ack(&node_a.node.get_our_node_id(), &as_revoke_and_ack);
1372                                 assert!(node_b.node.get_and_clear_pending_msg_events().is_empty());
1373                                 check_added_monitors!(node_b, 1);
1374                         }
1375                 } else {
1376                         assert!(chan_msgs.2.is_none());
1377                 }
1378         }
1379
1380         for chan_msgs in resp_2.drain(..) {
1381                 if send_funding_locked.1 {
1382                         node_b.node.handle_funding_locked(&node_a.node.get_our_node_id(), &chan_msgs.0.unwrap());
1383                         let announcement_event = node_b.node.get_and_clear_pending_msg_events();
1384                         if !announcement_event.is_empty() {
1385                                 assert_eq!(announcement_event.len(), 1);
1386                                 if let MessageSendEvent::SendAnnouncementSignatures { .. } = announcement_event[0] {
1387                                         //TODO: Test announcement_sigs re-sending
1388                                 } else { panic!("Unexpected event!"); }
1389                         }
1390                 } else {
1391                         assert!(chan_msgs.0.is_none());
1392                 }
1393                 if pending_raa.1 {
1394                         assert!(chan_msgs.3 == RAACommitmentOrder::RevokeAndACKFirst);
1395                         node_b.node.handle_revoke_and_ack(&node_a.node.get_our_node_id(), &chan_msgs.1.unwrap());
1396                         assert!(node_b.node.get_and_clear_pending_msg_events().is_empty());
1397                         check_added_monitors!(node_b, 1);
1398                 } else {
1399                         assert!(chan_msgs.1.is_none());
1400                 }
1401                 if pending_htlc_adds.1 != 0 || pending_htlc_claims.1 != 0 || pending_cell_htlc_claims.1 != 0 || pending_cell_htlc_fails.1 != 0 {
1402                         let commitment_update = chan_msgs.2.unwrap();
1403                         if pending_htlc_adds.1 != -1 { // We use -1 to denote a response commitment_signed
1404                                 assert_eq!(commitment_update.update_add_htlcs.len(), pending_htlc_adds.1 as usize);
1405                         }
1406                         assert_eq!(commitment_update.update_fulfill_htlcs.len(), pending_htlc_claims.0 + pending_cell_htlc_claims.0);
1407                         assert_eq!(commitment_update.update_fail_htlcs.len(), pending_cell_htlc_fails.0);
1408                         assert!(commitment_update.update_fail_malformed_htlcs.is_empty());
1409                         for update_add in commitment_update.update_add_htlcs {
1410                                 node_b.node.handle_update_add_htlc(&node_a.node.get_our_node_id(), &update_add);
1411                         }
1412                         for update_fulfill in commitment_update.update_fulfill_htlcs {
1413                                 node_b.node.handle_update_fulfill_htlc(&node_a.node.get_our_node_id(), &update_fulfill);
1414                         }
1415                         for update_fail in commitment_update.update_fail_htlcs {
1416                                 node_b.node.handle_update_fail_htlc(&node_a.node.get_our_node_id(), &update_fail);
1417                         }
1418
1419                         if pending_htlc_adds.1 != -1 { // We use -1 to denote a response commitment_signed
1420                                 commitment_signed_dance!(node_b, node_a, commitment_update.commitment_signed, false);
1421                         } else {
1422                                 node_b.node.handle_commitment_signed(&node_a.node.get_our_node_id(), &commitment_update.commitment_signed);
1423                                 check_added_monitors!(node_b, 1);
1424                                 let bs_revoke_and_ack = get_event_msg!(node_b, MessageSendEvent::SendRevokeAndACK, node_a.node.get_our_node_id());
1425                                 // No commitment_signed so get_event_msg's assert(len == 1) passes
1426                                 node_a.node.handle_revoke_and_ack(&node_b.node.get_our_node_id(), &bs_revoke_and_ack);
1427                                 assert!(node_a.node.get_and_clear_pending_msg_events().is_empty());
1428                                 check_added_monitors!(node_a, 1);
1429                         }
1430                 } else {
1431                         assert!(chan_msgs.2.is_none());
1432                 }
1433         }
1434 }