_ 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, PaymentSecret, PaymentSendFailure};
   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(), 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(), 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() == $channel_id {
 267                                         commitment_txn = Some(monitor.unsafe_get_latest_local_commitment_txn());
 268                                         break;
 269                                 }
 270                         }
 271                         commitment_txn.unwrap()
 272                 }
 273         }
 274 }
 275
 276 macro_rules! unwrap_send_err {
 277         ($res: expr, $all_failed: expr, $type: pat, $check: expr) => {
 278                 match &$res {
 279                         &Err(PaymentSendFailure::AllFailedRetrySafe(ref fails)) if $all_failed => {
 280                                 assert_eq!(fails.len(), 1);
 281                                 match fails[0] {
 282                                         $type => { $check },
 283                                         _ => panic!(),
 284                                 }
 285                         },
 286                         &Err(PaymentSendFailure::PartialFailure(ref fails)) if !$all_failed => {
 287                                 assert_eq!(fails.len(), 1);
 288                                 match fails[0] {
 289                                         Err($type) => { $check },
 290                                         _ => panic!(),
 291                                 }
 292                         },
 293                         _ => panic!(),
 294                 }
 295         }
 296 }
 297
 298 macro_rules! check_added_monitors {
 299         ($node: expr, $count: expr) => {
 300                 {
 301                         let mut added_monitors = $node.chan_monitor.added_monitors.lock().unwrap();
 302                         assert_eq!(added_monitors.len(), $count);
 303                         added_monitors.clear();
 304                 }
 305         }
 306 }
 307
 308 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) {
 309         let chan_id = *node.network_chan_count.borrow();
 310
 311         let events = node.node.get_and_clear_pending_events();
 312         assert_eq!(events.len(), 1);
 313         match events[0] {
 314                 Event::FundingGenerationReady { ref temporary_channel_id, ref channel_value_satoshis, ref output_script, user_channel_id } => {
 315                         assert_eq!(*channel_value_satoshis, expected_chan_value);
 316                         assert_eq!(user_channel_id, expected_user_chan_id);
 317
 318                         let tx = Transaction { version: chan_id as u32, lock_time: 0, input: Vec::new(), output: vec![TxOut {
 319                                 value: *channel_value_satoshis, script_pubkey: output_script.clone(),
 320                         }]};
 321                         let funding_outpoint = OutPoint::new(tx.txid(), 0);
 322                         (*temporary_channel_id, tx, funding_outpoint)
 323                 },
 324                 _ => panic!("Unexpected event"),
 325         }
 326 }
 327
 328 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 {
 329         node_a.node.create_channel(node_b.node.get_our_node_id(), channel_value, push_msat, 42, None).unwrap();
 330         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()));
 331         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()));
 332
 333         let (temporary_channel_id, tx, funding_output) = create_funding_transaction(node_a, channel_value, 42);
 334
 335         node_a.node.funding_transaction_generated(&temporary_channel_id, funding_output);
 336         check_added_monitors!(node_a, 0);
 337
 338         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()));
 339         {
 340                 let mut added_monitors = node_b.chan_monitor.added_monitors.lock().unwrap();
 341                 assert_eq!(added_monitors.len(), 1);
 342                 assert_eq!(added_monitors[0].0, funding_output);
 343                 added_monitors.clear();
 344         }
 345
 346         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()));
 347         {
 348                 let mut added_monitors = node_a.chan_monitor.added_monitors.lock().unwrap();
 349                 assert_eq!(added_monitors.len(), 1);
 350                 assert_eq!(added_monitors[0].0, funding_output);
 351                 added_monitors.clear();
 352         }
 353
 354         let events_4 = node_a.node.get_and_clear_pending_events();
 355         assert_eq!(events_4.len(), 1);
 356         match events_4[0] {
 357                 Event::FundingBroadcastSafe { ref funding_txo, user_channel_id } => {
 358                         assert_eq!(user_channel_id, 42);
 359                         assert_eq!(*funding_txo, funding_output);
 360                 },
 361                 _ => panic!("Unexpected event"),
 362         };
 363
 364         tx
 365 }
 366
 367 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) {
 368         confirm_transaction(&node_conf.block_notifier, &node_conf.chain_monitor, &tx, tx.version);
 369         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()));
 370 }
 371
 372 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]) {
 373         let channel_id;
 374         let events_6 = node_conf.node.get_and_clear_pending_msg_events();
 375         assert_eq!(events_6.len(), 2);
 376         ((match events_6[0] {
 377                 MessageSendEvent::SendFundingLocked { ref node_id, ref msg } => {
 378                         channel_id = msg.channel_id.clone();
 379                         assert_eq!(*node_id, node_recv.node.get_our_node_id());
 380                         msg.clone()
 381                 },
 382                 _ => panic!("Unexpected event"),
 383         }, match events_6[1] {
 384                 MessageSendEvent::SendAnnouncementSignatures { ref node_id, ref msg } => {
 385                         assert_eq!(*node_id, node_recv.node.get_our_node_id());
 386                         msg.clone()
 387                 },
 388                 _ => panic!("Unexpected event"),
 389         }), channel_id)
 390 }
 391
 392 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]) {
 393         create_chan_between_nodes_with_value_confirm_first(node_a, node_b, tx);
 394         confirm_transaction(&node_a.block_notifier, &node_a.chain_monitor, &tx, tx.version);
 395         create_chan_between_nodes_with_value_confirm_second(node_b, node_a)
 396 }
 397
 398 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) {
 399         let tx = create_chan_between_nodes_with_value_init(node_a, node_b, channel_value, push_msat, a_flags, b_flags);
 400         let (msgs, chan_id) = create_chan_between_nodes_with_value_confirm(node_a, node_b, &tx);
 401         (msgs, chan_id, tx)
 402 }
 403
 404 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) {
 405         node_b.node.handle_funding_locked(&node_a.node.get_our_node_id(), &as_funding_msgs.0);
 406         let bs_announcement_sigs = get_event_msg!(node_b, MessageSendEvent::SendAnnouncementSignatures, node_a.node.get_our_node_id());
 407         node_b.node.handle_announcement_signatures(&node_a.node.get_our_node_id(), &as_funding_msgs.1);
 408
 409         let events_7 = node_b.node.get_and_clear_pending_msg_events();
 410         assert_eq!(events_7.len(), 1);
 411         let (announcement, bs_update) = match events_7[0] {
 412                 MessageSendEvent::BroadcastChannelAnnouncement { ref msg, ref update_msg } => {
 413                         (msg, update_msg)
 414                 },
 415                 _ => panic!("Unexpected event"),
 416         };
 417
 418         node_a.node.handle_announcement_signatures(&node_b.node.get_our_node_id(), &bs_announcement_sigs);
 419         let events_8 = node_a.node.get_and_clear_pending_msg_events();
 420         assert_eq!(events_8.len(), 1);
 421         let as_update = match events_8[0] {
 422                 MessageSendEvent::BroadcastChannelAnnouncement { ref msg, ref update_msg } => {
 423                         assert!(*announcement == *msg);
 424                         assert_eq!(update_msg.contents.short_channel_id, announcement.contents.short_channel_id);
 425                         assert_eq!(update_msg.contents.short_channel_id, bs_update.contents.short_channel_id);
 426                         update_msg
 427                 },
 428                 _ => panic!("Unexpected event"),
 429         };
 430
 431         *node_a.network_chan_count.borrow_mut() += 1;
 432
 433         ((*announcement).clone(), (*as_update).clone(), (*bs_update).clone())
 434 }
 435
 436 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) {
 437         create_announced_chan_between_nodes_with_value(nodes, a, b, 100000, 10001, a_flags, b_flags)
 438 }
 439
 440 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) {
 441         let chan_announcement = create_chan_between_nodes_with_value(&nodes[a], &nodes[b], channel_value, push_msat, a_flags, b_flags);
 442
 443         nodes[a].node.broadcast_node_announcement([0, 0, 0], [0; 32], Vec::new());
 444         let a_events = nodes[a].node.get_and_clear_pending_msg_events();
 445         assert_eq!(a_events.len(), 1);
 446         let a_node_announcement = match a_events[0] {
 447                 MessageSendEvent::BroadcastNodeAnnouncement { ref msg } => {
 448                         (*msg).clone()
 449                 },
 450                 _ => panic!("Unexpected event"),
 451         };
 452
 453         nodes[b].node.broadcast_node_announcement([1, 1, 1], [1; 32], Vec::new());
 454         let b_events = nodes[b].node.get_and_clear_pending_msg_events();
 455         assert_eq!(b_events.len(), 1);
 456         let b_node_announcement = match b_events[0] {
 457                 MessageSendEvent::BroadcastNodeAnnouncement { ref msg } => {
 458                         (*msg).clone()
 459                 },
 460                 _ => panic!("Unexpected event"),
 461         };
 462
 463         for node in nodes {
 464                 assert!(node.router.handle_channel_announcement(&chan_announcement.0).unwrap());
 465                 node.router.handle_channel_update(&chan_announcement.1).unwrap();
 466                 node.router.handle_channel_update(&chan_announcement.2).unwrap();
 467                 node.router.handle_node_announcement(&a_node_announcement).unwrap();
 468                 node.router.handle_node_announcement(&b_node_announcement).unwrap();
 469         }
 470         (chan_announcement.1, chan_announcement.2, chan_announcement.3, chan_announcement.4)
 471 }
 472
 473 macro_rules! check_spends {
 474         ($tx: expr, $($spends_txn: expr),*) => {
 475                 {
 476                         $tx.verify(|out_point| {
 477                                 $(
 478                                         if out_point.txid == $spends_txn.txid() {
 479                                                 return $spends_txn.output.get(out_point.vout as usize).cloned()
 480                                         }
 481                                 )*
 482                                 None
 483                         }).unwrap();
 484                 }
 485         }
 486 }
 487
 488 macro_rules! get_closing_signed_broadcast {
 489         ($node: expr, $dest_pubkey: expr) => {
 490                 {
 491                         let events = $node.get_and_clear_pending_msg_events();
 492                         assert!(events.len() == 1 || events.len() == 2);
 493                         (match events[events.len() - 1] {
 494                                 MessageSendEvent::BroadcastChannelUpdate { ref msg } => {
 495                                         assert_eq!(msg.contents.flags & 2, 2);
 496                                         msg.clone()
 497                                 },
 498                                 _ => panic!("Unexpected event"),
 499                         }, if events.len() == 2 {
 500                                 match events[0] {
 501                                         MessageSendEvent::SendClosingSigned { ref node_id, ref msg } => {
 502                                                 assert_eq!(*node_id, $dest_pubkey);
 503                                                 Some(msg.clone())
 504                                         },
 505                                         _ => panic!("Unexpected event"),
 506                                 }
 507                         } else { None })
 508                 }
 509         }
 510 }
 511
 512 macro_rules! check_closed_broadcast {
 513         ($node: expr, $with_error_msg: expr) => {{
 514                 let events = $node.node.get_and_clear_pending_msg_events();
 515                 assert_eq!(events.len(), if $with_error_msg { 2 } else { 1 });
 516                 match events[0] {
 517                         MessageSendEvent::BroadcastChannelUpdate { ref msg } => {
 518                                 assert_eq!(msg.contents.flags & 2, 2);
 519                         },
 520                         _ => panic!("Unexpected event"),
 521                 }
 522                 if $with_error_msg {
 523                         match events[1] {
 524                                 MessageSendEvent::HandleError { action: ErrorAction::SendErrorMessage { ref msg }, node_id: _ } => {
 525                                         // TODO: Check node_id
 526                                         Some(msg.clone())
 527                                 },
 528                                 _ => panic!("Unexpected event"),
 529                         }
 530                 } else { None }
 531         }}
 532 }
 533
 534 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) {
 535         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) };
 536         let (node_b, broadcaster_b) = if close_inbound_first { (&outbound_node.node, &outbound_node.tx_broadcaster) } else { (&inbound_node.node, &inbound_node.tx_broadcaster) };
 537         let (tx_a, tx_b);
 538
 539         node_a.close_channel(channel_id).unwrap();
 540         node_b.handle_shutdown(&node_a.get_our_node_id(), &get_event_msg!(struct_a, MessageSendEvent::SendShutdown, node_b.get_our_node_id()));
 541
 542         let events_1 = node_b.get_and_clear_pending_msg_events();
 543         assert!(events_1.len() >= 1);
 544         let shutdown_b = match events_1[0] {
 545                 MessageSendEvent::SendShutdown { ref node_id, ref msg } => {
 546                         assert_eq!(node_id, &node_a.get_our_node_id());
 547                         msg.clone()
 548                 },
 549                 _ => panic!("Unexpected event"),
 550         };
 551
 552         let closing_signed_b = if !close_inbound_first {
 553                 assert_eq!(events_1.len(), 1);
 554                 None
 555         } else {
 556                 Some(match events_1[1] {
 557                         MessageSendEvent::SendClosingSigned { ref node_id, ref msg } => {
 558                                 assert_eq!(node_id, &node_a.get_our_node_id());
 559                                 msg.clone()
 560                         },
 561                         _ => panic!("Unexpected event"),
 562                 })
 563         };
 564
 565         node_a.handle_shutdown(&node_b.get_our_node_id(), &shutdown_b);
 566         let (as_update, bs_update) = if close_inbound_first {
 567                 assert!(node_a.get_and_clear_pending_msg_events().is_empty());
 568                 node_a.handle_closing_signed(&node_b.get_our_node_id(), &closing_signed_b.unwrap());
 569                 assert_eq!(broadcaster_a.txn_broadcasted.lock().unwrap().len(), 1);
 570                 tx_a = broadcaster_a.txn_broadcasted.lock().unwrap().remove(0);
 571                 let (as_update, closing_signed_a) = get_closing_signed_broadcast!(node_a, node_b.get_our_node_id());
 572
 573                 node_b.handle_closing_signed(&node_a.get_our_node_id(), &closing_signed_a.unwrap());
 574                 let (bs_update, none_b) = get_closing_signed_broadcast!(node_b, node_a.get_our_node_id());
 575                 assert!(none_b.is_none());
 576                 assert_eq!(broadcaster_b.txn_broadcasted.lock().unwrap().len(), 1);
 577                 tx_b = broadcaster_b.txn_broadcasted.lock().unwrap().remove(0);
 578                 (as_update, bs_update)
 579         } else {
 580                 let closing_signed_a = get_event_msg!(struct_a, MessageSendEvent::SendClosingSigned, node_b.get_our_node_id());
 581
 582                 node_b.handle_closing_signed(&node_a.get_our_node_id(), &closing_signed_a);
 583                 assert_eq!(broadcaster_b.txn_broadcasted.lock().unwrap().len(), 1);
 584                 tx_b = broadcaster_b.txn_broadcasted.lock().unwrap().remove(0);
 585                 let (bs_update, closing_signed_b) = get_closing_signed_broadcast!(node_b, node_a.get_our_node_id());
 586
 587                 node_a.handle_closing_signed(&node_b.get_our_node_id(), &closing_signed_b.unwrap());
 588                 let (as_update, none_a) = get_closing_signed_broadcast!(node_a, node_b.get_our_node_id());
 589                 assert!(none_a.is_none());
 590                 assert_eq!(broadcaster_a.txn_broadcasted.lock().unwrap().len(), 1);
 591                 tx_a = broadcaster_a.txn_broadcasted.lock().unwrap().remove(0);
 592                 (as_update, bs_update)
 593         };
 594         assert_eq!(tx_a, tx_b);
 595         check_spends!(tx_a, funding_tx);
 596
 597         (as_update, bs_update, tx_a)
 598 }
 599
 600 pub struct SendEvent {
 601         pub node_id: PublicKey,
 602         pub msgs: Vec<msgs::UpdateAddHTLC>,
 603         pub commitment_msg: msgs::CommitmentSigned,
 604 }
 605 impl SendEvent {
 606         pub fn from_commitment_update(node_id: PublicKey, updates: msgs::CommitmentUpdate) -> SendEvent {
 607                 assert!(updates.update_fulfill_htlcs.is_empty());
 608                 assert!(updates.update_fail_htlcs.is_empty());
 609                 assert!(updates.update_fail_malformed_htlcs.is_empty());
 610                 assert!(updates.update_fee.is_none());
 611                 SendEvent { node_id: node_id, msgs: updates.update_add_htlcs, commitment_msg: updates.commitment_signed }
 612         }
 613
 614         pub fn from_event(event: MessageSendEvent) -> SendEvent {
 615                 match event {
 616                         MessageSendEvent::UpdateHTLCs { node_id, updates } => SendEvent::from_commitment_update(node_id, updates),
 617                         _ => panic!("Unexpected event type!"),
 618                 }
 619         }
 620
 621         pub fn from_node<'a, 'b, 'c>(node: &Node<'a, 'b, 'c>) -> SendEvent {
 622                 let mut events = node.node.get_and_clear_pending_msg_events();
 623                 assert_eq!(events.len(), 1);
 624                 SendEvent::from_event(events.pop().unwrap())
 625         }
 626 }
 627
 628 macro_rules! commitment_signed_dance {
 629         ($node_a: expr, $node_b: expr, $commitment_signed: expr, $fail_backwards: expr, true /* skip last step */) => {
 630                 {
 631                         check_added_monitors!($node_a, 0);
 632                         assert!($node_a.node.get_and_clear_pending_msg_events().is_empty());
 633                         $node_a.node.handle_commitment_signed(&$node_b.node.get_our_node_id(), &$commitment_signed);
 634                         check_added_monitors!($node_a, 1);
 635                         commitment_signed_dance!($node_a, $node_b, (), $fail_backwards, true, false);
 636                 }
 637         };
 638         ($node_a: expr, $node_b: expr, (), $fail_backwards: expr, true /* skip last step */, true /* return extra message */, true /* return last RAA */) => {
 639                 {
 640                         let (as_revoke_and_ack, as_commitment_signed) = get_revoke_commit_msgs!($node_a, $node_b.node.get_our_node_id());
 641                         check_added_monitors!($node_b, 0);
 642                         assert!($node_b.node.get_and_clear_pending_msg_events().is_empty());
 643                         $node_b.node.handle_revoke_and_ack(&$node_a.node.get_our_node_id(), &as_revoke_and_ack);
 644                         assert!($node_b.node.get_and_clear_pending_msg_events().is_empty());
 645                         check_added_monitors!($node_b, 1);
 646                         $node_b.node.handle_commitment_signed(&$node_a.node.get_our_node_id(), &as_commitment_signed);
 647                         let (bs_revoke_and_ack, extra_msg_option) = {
 648                                 let events = $node_b.node.get_and_clear_pending_msg_events();
 649                                 assert!(events.len() <= 2);
 650                                 (match events[0] {
 651                                         MessageSendEvent::SendRevokeAndACK { ref node_id, ref msg } => {
 652                                                 assert_eq!(*node_id, $node_a.node.get_our_node_id());
 653                                                 (*msg).clone()
 654                                         },
 655                                         _ => panic!("Unexpected event"),
 656                                 }, events.get(1).map(|e| e.clone()))
 657                         };
 658                         check_added_monitors!($node_b, 1);
 659                         if $fail_backwards {
 660                                 assert!($node_a.node.get_and_clear_pending_events().is_empty());
 661                                 assert!($node_a.node.get_and_clear_pending_msg_events().is_empty());
 662                         }
 663                         (extra_msg_option, bs_revoke_and_ack)
 664                 }
 665         };
 666         ($node_a: expr, $node_b: expr, $commitment_signed: expr, $fail_backwards: expr, true /* skip last step */, false /* return extra message */, true /* return last RAA */) => {
 667                 {
 668                         check_added_monitors!($node_a, 0);
 669                         assert!($node_a.node.get_and_clear_pending_msg_events().is_empty());
 670                         $node_a.node.handle_commitment_signed(&$node_b.node.get_our_node_id(), &$commitment_signed);
 671                         check_added_monitors!($node_a, 1);
 672                         let (extra_msg_option, bs_revoke_and_ack) = commitment_signed_dance!($node_a, $node_b, (), $fail_backwards, true, true, true);
 673                         assert!(extra_msg_option.is_none());
 674                         bs_revoke_and_ack
 675                 }
 676         };
 677         ($node_a: expr, $node_b: expr, (), $fail_backwards: expr, true /* skip last step */, true /* return extra message */) => {
 678                 {
 679                         let (extra_msg_option, bs_revoke_and_ack) = commitment_signed_dance!($node_a, $node_b, (), $fail_backwards, true, true, true);
 680                         $node_a.node.handle_revoke_and_ack(&$node_b.node.get_our_node_id(), &bs_revoke_and_ack);
 681                         check_added_monitors!($node_a, 1);
 682                         extra_msg_option
 683                 }
 684         };
 685         ($node_a: expr, $node_b: expr, (), $fail_backwards: expr, true /* skip last step */, false /* no extra message */) => {
 686                 {
 687                         assert!(commitment_signed_dance!($node_a, $node_b, (), $fail_backwards, true, true).is_none());
 688                 }
 689         };
 690         ($node_a: expr, $node_b: expr, $commitment_signed: expr, $fail_backwards: expr) => {
 691                 {
 692                         commitment_signed_dance!($node_a, $node_b, $commitment_signed, $fail_backwards, true);
 693                         if $fail_backwards {
 694                                 expect_pending_htlcs_forwardable!($node_a);
 695                                 check_added_monitors!($node_a, 1);
 696
 697                                 let channel_state = $node_a.node.channel_state.lock().unwrap();
 698                                 assert_eq!(channel_state.pending_msg_events.len(), 1);
 699                                 if let MessageSendEvent::UpdateHTLCs { ref node_id, .. } = channel_state.pending_msg_events[0] {
 700                                         assert_ne!(*node_id, $node_b.node.get_our_node_id());
 701                                 } else { panic!("Unexpected event"); }
 702                         } else {
 703                                 assert!($node_a.node.get_and_clear_pending_msg_events().is_empty());
 704                         }
 705                 }
 706         }
 707 }
 708
 709 macro_rules! get_payment_preimage_hash {
 710         ($node: expr) => {
 711                 {
 712                         let payment_preimage = PaymentPreimage([*$node.network_payment_count.borrow(); 32]);
 713                         *$node.network_payment_count.borrow_mut() += 1;
 714                         let payment_hash = PaymentHash(Sha256::hash(&payment_preimage.0[..]).into_inner());
 715                         (payment_preimage, payment_hash)
 716                 }
 717         }
 718 }
 719
 720 macro_rules! expect_pending_htlcs_forwardable_ignore {
 721         ($node: expr) => {{
 722                 let events = $node.node.get_and_clear_pending_events();
 723                 assert_eq!(events.len(), 1);
 724                 match events[0] {
 725                         Event::PendingHTLCsForwardable { .. } => { },
 726                         _ => panic!("Unexpected event"),
 727                 };
 728         }}
 729 }
 730
 731 macro_rules! expect_pending_htlcs_forwardable {
 732         ($node: expr) => {{
 733                 expect_pending_htlcs_forwardable_ignore!($node);
 734                 $node.node.process_pending_htlc_forwards();
 735         }}
 736 }
 737
 738 macro_rules! expect_payment_received {
 739         ($node: expr, $expected_payment_hash: expr, $expected_recv_value: expr) => {
 740                 let events = $node.node.get_and_clear_pending_events();
 741                 assert_eq!(events.len(), 1);
 742                 match events[0] {
 743                         Event::PaymentReceived { ref payment_hash, ref payment_secret, amt } => {
 744                                 assert_eq!($expected_payment_hash, *payment_hash);
 745                                 assert_eq!(None, *payment_secret);
 746                                 assert_eq!($expected_recv_value, amt);
 747                         },
 748                         _ => panic!("Unexpected event"),
 749                 }
 750         }
 751 }
 752
 753 macro_rules! expect_payment_sent {
 754         ($node: expr, $expected_payment_preimage: expr) => {
 755                 let events = $node.node.get_and_clear_pending_events();
 756                 assert_eq!(events.len(), 1);
 757                 match events[0] {
 758                         Event::PaymentSent { ref payment_preimage } => {
 759                                 assert_eq!($expected_payment_preimage, *payment_preimage);
 760                         },
 761                         _ => panic!("Unexpected event"),
 762                 }
 763         }
 764 }
 765
 766 macro_rules! expect_payment_failed {
 767         ($node: expr, $expected_payment_hash: expr, $rejected_by_dest: expr) => {
 768                 let events = $node.node.get_and_clear_pending_events();
 769                 assert_eq!(events.len(), 1);
 770                 match events[0] {
 771                         Event::PaymentFailed { ref payment_hash, rejected_by_dest, .. } => {
 772                                 assert_eq!(*payment_hash, $expected_payment_hash);
 773                                 assert_eq!(rejected_by_dest, $rejected_by_dest);
 774                         },
 775                         _ => panic!("Unexpected event"),
 776                 }
 777         }
 778 }
 779
 780 pub fn send_along_route_with_secret<'a, 'b, 'c>(origin_node: &Node<'a, 'b, 'c>, route: Route, expected_paths: &[&[&Node<'a, 'b, 'c>]], recv_value: u64, our_payment_hash: PaymentHash, our_payment_secret: Option<PaymentSecret>) {
 781         origin_node.node.send_payment(&route, our_payment_hash, &our_payment_secret).unwrap();
 782         check_added_monitors!(origin_node, expected_paths.len());
 783
 784         let mut events = origin_node.node.get_and_clear_pending_msg_events();
 785         assert_eq!(events.len(), expected_paths.len());
 786         for (path_idx, (ev, expected_route)) in events.drain(..).zip(expected_paths.iter()).enumerate() {
 787                 let mut payment_event = SendEvent::from_event(ev);
 788                 let mut prev_node = origin_node;
 789
 790                 for (idx, &node) in expected_route.iter().enumerate() {
 791                         assert_eq!(node.node.get_our_node_id(), payment_event.node_id);
 792
 793                         node.node.handle_update_add_htlc(&prev_node.node.get_our_node_id(), &payment_event.msgs[0]);
 794                         check_added_monitors!(node, 0);
 795                         commitment_signed_dance!(node, prev_node, payment_event.commitment_msg, false);
 796
 797                         expect_pending_htlcs_forwardable!(node);
 798
 799                         if idx == expected_route.len() - 1 {
 800                                 let events_2 = node.node.get_and_clear_pending_events();
 801                                 // Once we've gotten through all the HTLCs, the last one should result in a
 802                                 // PaymentReceived (but each previous one should not!).
 803                                 if path_idx == expected_paths.len() - 1 {
 804                                         assert_eq!(events_2.len(), 1);
 805                                         match events_2[0] {
 806                                                 Event::PaymentReceived { ref payment_hash, ref payment_secret, amt } => {
 807                                                         assert_eq!(our_payment_hash, *payment_hash);
 808                                                         assert_eq!(our_payment_secret, *payment_secret);
 809                                                         assert_eq!(amt, recv_value);
 810                                                 },
 811                                                 _ => panic!("Unexpected event"),
 812                                         }
 813                                 } else {
 814                                         assert!(events_2.is_empty());
 815                                 }
 816                         } else {
 817                                 let mut events_2 = node.node.get_and_clear_pending_msg_events();
 818                                 assert_eq!(events_2.len(), 1);
 819                                 check_added_monitors!(node, 1);
 820                                 payment_event = SendEvent::from_event(events_2.remove(0));
 821                                 assert_eq!(payment_event.msgs.len(), 1);
 822                         }
 823
 824                         prev_node = node;
 825                 }
 826         }
 827 }
 828
 829 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) {
 830         send_along_route_with_secret(origin_node, route, &[expected_route], recv_value, our_payment_hash, None);
 831 }
 832
 833 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) {
 834         let (our_payment_preimage, our_payment_hash) = get_payment_preimage_hash!(origin_node);
 835         send_along_route_with_hash(origin_node, route, expected_route, recv_value, our_payment_hash);
 836         (our_payment_preimage, our_payment_hash)
 837 }
 838
 839 pub fn claim_payment_along_route_with_secret<'a, 'b, 'c>(origin_node: &Node<'a, 'b, 'c>, expected_paths: &[&[&Node<'a, 'b, 'c>]], skip_last: bool, our_payment_preimage: PaymentPreimage, our_payment_secret: Option<PaymentSecret>, expected_amount: u64) {
 840         for path in expected_paths.iter() {
 841                 assert_eq!(path.last().unwrap().node.get_our_node_id(), expected_paths[0].last().unwrap().node.get_our_node_id());
 842         }
 843         assert!(expected_paths[0].last().unwrap().node.claim_funds(our_payment_preimage, &our_payment_secret, expected_amount));
 844         check_added_monitors!(expected_paths[0].last().unwrap(), expected_paths.len());
 845
 846         macro_rules! msgs_from_ev {
 847                 ($ev: expr) => {
 848                         match $ev {
 849                                 &MessageSendEvent::UpdateHTLCs { ref node_id, updates: msgs::CommitmentUpdate { ref update_add_htlcs, ref update_fulfill_htlcs, ref update_fail_htlcs, ref update_fail_malformed_htlcs, ref update_fee, ref commitment_signed } } => {
 850                                         assert!(update_add_htlcs.is_empty());
 851                                         assert_eq!(update_fulfill_htlcs.len(), 1);
 852                                         assert!(update_fail_htlcs.is_empty());
 853                                         assert!(update_fail_malformed_htlcs.is_empty());
 854                                         assert!(update_fee.is_none());
 855                                         ((update_fulfill_htlcs[0].clone(), commitment_signed.clone()), node_id.clone())
 856                                 },
 857                                 _ => panic!("Unexpected event"),
 858                         }
 859                 }
 860         }
 861         let mut per_path_msgs: Vec<((msgs::UpdateFulfillHTLC, msgs::CommitmentSigned), PublicKey)> = Vec::with_capacity(expected_paths.len());
 862         let events = expected_paths[0].last().unwrap().node.get_and_clear_pending_msg_events();
 863         assert_eq!(events.len(), expected_paths.len());
 864         for ev in events.iter() {
 865                 per_path_msgs.push(msgs_from_ev!(ev));
 866         }
 867
 868         for (expected_route, (path_msgs, next_hop)) in expected_paths.iter().zip(per_path_msgs.drain(..)) {
 869                 let mut next_msgs = Some(path_msgs);
 870                 let mut expected_next_node = next_hop;
 871
 872                 macro_rules! last_update_fulfill_dance {
 873                         ($node: expr, $prev_node: expr) => {
 874                                 {
 875                                         $node.node.handle_update_fulfill_htlc(&$prev_node.node.get_our_node_id(), &next_msgs.as_ref().unwrap().0);
 876                                         check_added_monitors!($node, 0);
 877                                         assert!($node.node.get_and_clear_pending_msg_events().is_empty());
 878                                         commitment_signed_dance!($node, $prev_node, next_msgs.as_ref().unwrap().1, false);
 879                                 }
 880                         }
 881                 }
 882                 macro_rules! mid_update_fulfill_dance {
 883                         ($node: expr, $prev_node: expr, $new_msgs: expr) => {
 884                                 {
 885                                         $node.node.handle_update_fulfill_htlc(&$prev_node.node.get_our_node_id(), &next_msgs.as_ref().unwrap().0);
 886                                         check_added_monitors!($node, 1);
 887                                         let new_next_msgs = if $new_msgs {
 888                                                 let events = $node.node.get_and_clear_pending_msg_events();
 889                                                 assert_eq!(events.len(), 1);
 890                                                 let (res, nexthop) = msgs_from_ev!(&events[0]);
 891                                                 expected_next_node = nexthop;
 892                                                 Some(res)
 893                                         } else {
 894                                                 assert!($node.node.get_and_clear_pending_msg_events().is_empty());
 895                                                 None
 896                                         };
 897                                         commitment_signed_dance!($node, $prev_node, next_msgs.as_ref().unwrap().1, false);
 898                                         next_msgs = new_next_msgs;
 899                                 }
 900                         }
 901                 }
 902
 903                 let mut prev_node = expected_route.last().unwrap();
 904                 for (idx, node) in expected_route.iter().rev().enumerate().skip(1) {
 905                         assert_eq!(expected_next_node, node.node.get_our_node_id());
 906                         let update_next_msgs = !skip_last || idx != expected_route.len() - 1;
 907                         if next_msgs.is_some() {
 908                                 mid_update_fulfill_dance!(node, prev_node, update_next_msgs);
 909                         } else {
 910                                 assert!(!update_next_msgs);
 911                                 assert!(node.node.get_and_clear_pending_msg_events().is_empty());
 912                         }
 913                         if !skip_last && idx == expected_route.len() - 1 {
 914                                 assert_eq!(expected_next_node, origin_node.node.get_our_node_id());
 915                         }
 916
 917                         prev_node = node;
 918                 }
 919
 920                 if !skip_last {
 921                         last_update_fulfill_dance!(origin_node, expected_route.first().unwrap());
 922                         expect_payment_sent!(origin_node, our_payment_preimage);
 923                 }
 924         }
 925 }
 926
 927 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) {
 928         claim_payment_along_route_with_secret(origin_node, &[expected_route], skip_last, our_payment_preimage, None, expected_amount);
 929 }
 930
 931 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) {
 932         claim_payment_along_route(origin_node, expected_route, false, our_payment_preimage, expected_amount);
 933 }
 934
 935 pub const TEST_FINAL_CLTV: u32 = 32;
 936
 937 pub fn route_payment<'a, 'b, 'c>(origin_node: &Node<'a, 'b, 'c>, expected_route: &[&Node<'a, 'b, 'c>], recv_value: u64) -> (PaymentPreimage, PaymentHash) {
 938         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();
 939         assert_eq!(route.paths.len(), 1);
 940         assert_eq!(route.paths[0].len(), expected_route.len());
 941         for (node, hop) in expected_route.iter().zip(route.paths[0].iter()) {
 942                 assert_eq!(hop.pubkey, node.node.get_our_node_id());
 943         }
 944
 945         send_along_route(origin_node, route, expected_route, recv_value)
 946 }
 947
 948 pub fn route_over_limit<'a, 'b, 'c>(origin_node: &Node<'a, 'b, 'c>, expected_route: &[&Node<'a, 'b, 'c>], recv_value: u64)  {
 949         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();
 950         assert_eq!(route.paths.len(), 1);
 951         assert_eq!(route.paths[0].len(), expected_route.len());
 952         for (node, hop) in expected_route.iter().zip(route.paths[0].iter()) {
 953                 assert_eq!(hop.pubkey, node.node.get_our_node_id());
 954         }
 955
 956         let (_, our_payment_hash) = get_payment_preimage_hash!(origin_node);
 957         unwrap_send_err!(origin_node.node.send_payment(&route, our_payment_hash, &None), true, APIError::ChannelUnavailable { err },
 958                 assert_eq!(err, "Cannot send value that would put us over the max HTLC value in flight our peer will accept"));
 959 }
 960
 961 pub fn send_payment<'a, 'b, 'c>(origin: &Node<'a, 'b, 'c>, expected_route: &[&Node<'a, 'b, 'c>], recv_value: u64, expected_value: u64)  {
 962         let our_payment_preimage = route_payment(&origin, expected_route, recv_value).0;
 963         claim_payment(&origin, expected_route, our_payment_preimage, expected_value);
 964 }
 965
 966 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)  {
 967         assert!(expected_route.last().unwrap().node.fail_htlc_backwards(&our_payment_hash, &None));
 968         expect_pending_htlcs_forwardable!(expected_route.last().unwrap());
 969         check_added_monitors!(expected_route.last().unwrap(), 1);
 970
 971         let mut next_msgs: Option<(msgs::UpdateFailHTLC, msgs::CommitmentSigned)> = None;
 972         macro_rules! update_fail_dance {
 973                 ($node: expr, $prev_node: expr, $last_node: expr) => {
 974                         {
 975                                 $node.node.handle_update_fail_htlc(&$prev_node.node.get_our_node_id(), &next_msgs.as_ref().unwrap().0);
 976                                 commitment_signed_dance!($node, $prev_node, next_msgs.as_ref().unwrap().1, !$last_node);
 977                                 if skip_last && $last_node {
 978                                         expect_pending_htlcs_forwardable!($node);
 979                                 }
 980                         }
 981                 }
 982         }
 983
 984         let mut expected_next_node = expected_route.last().unwrap().node.get_our_node_id();
 985         let mut prev_node = expected_route.last().unwrap();
 986         for (idx, node) in expected_route.iter().rev().enumerate() {
 987                 assert_eq!(expected_next_node, node.node.get_our_node_id());
 988                 if next_msgs.is_some() {
 989                         // We may be the "last node" for the purpose of the commitment dance if we're
 990                         // skipping the last node (implying it is disconnected) and we're the
 991                         // second-to-last node!
 992                         update_fail_dance!(node, prev_node, skip_last && idx == expected_route.len() - 1);
 993                 }
 994
 995                 let events = node.node.get_and_clear_pending_msg_events();
 996                 if !skip_last || idx != expected_route.len() - 1 {
 997                         assert_eq!(events.len(), 1);
 998                         match events[0] {
 999                                 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 } } => {
1000                                         assert!(update_add_htlcs.is_empty());
1001                                         assert!(update_fulfill_htlcs.is_empty());
1002                                         assert_eq!(update_fail_htlcs.len(), 1);
1003                                         assert!(update_fail_malformed_htlcs.is_empty());
1004                                         assert!(update_fee.is_none());
1005                                         expected_next_node = node_id.clone();
1006                                         next_msgs = Some((update_fail_htlcs[0].clone(), commitment_signed.clone()));
1007                                 },
1008                                 _ => panic!("Unexpected event"),
1009                         }
1010                 } else {
1011                         assert!(events.is_empty());
1012                 }
1013                 if !skip_last && idx == expected_route.len() - 1 {
1014                         assert_eq!(expected_next_node, origin_node.node.get_our_node_id());
1015                 }
1016
1017                 prev_node = node;
1018         }
1019
1020         if !skip_last {
1021                 update_fail_dance!(origin_node, expected_route.first().unwrap(), true);
1022
1023                 let events = origin_node.node.get_and_clear_pending_events();
1024                 assert_eq!(events.len(), 1);
1025                 match events[0] {
1026                         Event::PaymentFailed { payment_hash, rejected_by_dest, .. } => {
1027                                 assert_eq!(payment_hash, our_payment_hash);
1028                                 assert!(rejected_by_dest);
1029                         },
1030                         _ => panic!("Unexpected event"),
1031                 }
1032         }
1033 }
1034
1035 pub fn fail_payment<'a, 'b, 'c>(origin_node: &Node<'a, 'b, 'c>, expected_route: &[&Node<'a, 'b, 'c>], our_payment_hash: PaymentHash)  {
1036         fail_payment_along_route(origin_node, expected_route, false, our_payment_hash);
1037 }
1038
1039 pub fn create_chanmon_cfgs(node_count: usize) -> Vec<TestChanMonCfg> {
1040         let mut chan_mon_cfgs = Vec::new();
1041         for _ in 0..node_count {
1042                 let tx_broadcaster = test_utils::TestBroadcaster{txn_broadcasted: Mutex::new(Vec::new())};
1043                 let fee_estimator = test_utils::TestFeeEstimator { sat_per_kw: 253 };
1044                 chan_mon_cfgs.push(TestChanMonCfg{ tx_broadcaster, fee_estimator });
1045         }
1046
1047         chan_mon_cfgs
1048 }
1049
1050 pub fn create_node_cfgs<'a>(node_count: usize, chanmon_cfgs: &'a Vec<TestChanMonCfg>) -> Vec<NodeCfg<'a>> {
1051         let mut nodes = Vec::new();
1052         let mut rng = thread_rng();
1053
1054         for i in 0..node_count {
1055                 let logger = Arc::new(test_utils::TestLogger::with_id(format!("node {}", i)));
1056                 let chain_monitor = Arc::new(chaininterface::ChainWatchInterfaceUtil::new(Network::Testnet, logger.clone() as Arc<Logger>));
1057                 let mut seed = [0; 32];
1058                 rng.fill_bytes(&mut seed);
1059                 let keys_manager = test_utils::TestKeysInterface::new(&seed, Network::Testnet, logger.clone() as Arc<Logger>);
1060                 let chan_monitor = test_utils::TestChannelMonitor::new(chain_monitor.clone(), &chanmon_cfgs[i].tx_broadcaster, logger.clone(), &chanmon_cfgs[i].fee_estimator);
1061                 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 });
1062         }
1063
1064         nodes
1065 }
1066
1067 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>> {
1068         let mut chanmgrs = Vec::new();
1069         for i in 0..node_count {
1070                 let mut default_config = UserConfig::default();
1071                 default_config.channel_options.announced_channel = true;
1072                 default_config.peer_channel_config_limits.force_announced_channel_preference = false;
1073                 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
1074                 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();
1075                 chanmgrs.push(node);
1076         }
1077
1078         chanmgrs
1079 }
1080
1081 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>> {
1082         let secp_ctx = Secp256k1::new();
1083         let mut nodes = Vec::new();
1084         let chan_count = Rc::new(RefCell::new(0));
1085         let payment_count = Rc::new(RefCell::new(0));
1086
1087         for i in 0..node_count {
1088                 let block_notifier = chaininterface::BlockNotifier::new(cfgs[i].chain_monitor.clone());
1089                 block_notifier.register_listener(&cfgs[i].chan_monitor.simple_monitor as &chaininterface::ChainListener);
1090                 block_notifier.register_listener(&chan_mgrs[i] as &chaininterface::ChainListener);
1091                 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>);
1092                 nodes.push(Node{ chain_monitor: cfgs[i].chain_monitor.clone(), block_notifier,
1093                                                                                  tx_broadcaster: cfgs[i].tx_broadcaster, chan_monitor: &cfgs[i].chan_monitor,
1094                                                                                  keys_manager: &cfgs[i].keys_manager, node: &chan_mgrs[i], router,
1095                                                                                  node_seed: cfgs[i].node_seed, network_chan_count: chan_count.clone(),
1096                                                                                  network_payment_count: payment_count.clone(), logger: cfgs[i].logger.clone(),
1097                 })
1098         }
1099
1100         nodes
1101 }
1102
1103 pub const ACCEPTED_HTLC_SCRIPT_WEIGHT: usize = 138; //Here we have a diff due to HTLC CLTV expiry being < 2^15 in test
1104 pub const OFFERED_HTLC_SCRIPT_WEIGHT: usize = 133;
1105
1106 #[derive(PartialEq)]
1107 pub enum HTLCType { NONE, TIMEOUT, SUCCESS }
1108 /// Tests that the given node has broadcast transactions for the given Channel
1109 ///
1110 /// First checks that the latest local commitment tx has been broadcast, unless an explicit
1111 /// commitment_tx is provided, which may be used to test that a remote commitment tx was
1112 /// broadcast and the revoked outputs were claimed.
1113 ///
1114 /// Next tests that there is (or is not) a transaction that spends the commitment transaction
1115 /// that appears to be the type of HTLC transaction specified in has_htlc_tx.
1116 ///
1117 /// All broadcast transactions must be accounted for in one of the above three types of we'll
1118 /// also fail.
1119 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>  {
1120         let mut node_txn = node.tx_broadcaster.txn_broadcasted.lock().unwrap();
1121         assert!(node_txn.len() >= if commitment_tx.is_some() { 0 } else { 1 } + if has_htlc_tx == HTLCType::NONE { 0 } else { 1 });
1122
1123         let mut res = Vec::with_capacity(2);
1124         node_txn.retain(|tx| {
1125                 if tx.input.len() == 1 && tx.input[0].previous_output.txid == chan.3.txid() {
1126                         check_spends!(tx, chan.3);
1127                         if commitment_tx.is_none() {
1128                                 res.push(tx.clone());
1129                         }
1130                         false
1131                 } else { true }
1132         });
1133         if let Some(explicit_tx) = commitment_tx {
1134                 res.push(explicit_tx.clone());
1135         }
1136
1137         assert_eq!(res.len(), 1);
1138
1139         if has_htlc_tx != HTLCType::NONE {
1140                 node_txn.retain(|tx| {
1141                         if tx.input.len() == 1 && tx.input[0].previous_output.txid == res[0].txid() {
1142                                 check_spends!(tx, res[0]);
1143                                 if has_htlc_tx == HTLCType::TIMEOUT {
1144                                         assert!(tx.lock_time != 0);
1145                                 } else {
1146                                         assert!(tx.lock_time == 0);
1147                                 }
1148                                 res.push(tx.clone());
1149                                 false
1150                         } else { true }
1151                 });
1152                 assert!(res.len() == 2 || res.len() == 3);
1153                 if res.len() == 3 {
1154                         assert_eq!(res[1], res[2]);
1155                 }
1156         }
1157
1158         assert!(node_txn.is_empty());
1159         res
1160 }
1161
1162 /// Tests that the given node has broadcast a claim transaction against the provided revoked
1163 /// HTLC transaction.
1164 pub fn test_revoked_htlc_claim_txn_broadcast<'a, 'b, 'c>(node: &Node<'a, 'b, 'c>, revoked_tx: Transaction, commitment_revoked_tx: Transaction)  {
1165         let mut node_txn = node.tx_broadcaster.txn_broadcasted.lock().unwrap();
1166         // We may issue multiple claiming transaction on revoked outputs due to block rescan
1167         // for revoked htlc outputs
1168         if node_txn.len() != 1 && node_txn.len() != 2 && node_txn.len() != 3 { assert!(false); }
1169         node_txn.retain(|tx| {
1170                 if tx.input.len() == 1 && tx.input[0].previous_output.txid == revoked_tx.txid() {
1171                         check_spends!(tx, revoked_tx);
1172                         false
1173                 } else { true }
1174         });
1175         node_txn.retain(|tx| {
1176                 check_spends!(tx, commitment_revoked_tx);
1177                 false
1178         });
1179         assert!(node_txn.is_empty());
1180 }
1181
1182 pub fn check_preimage_claim<'a, 'b, 'c>(node: &Node<'a, 'b, 'c>, prev_txn: &Vec<Transaction>) -> Vec<Transaction>  {
1183         let mut node_txn = node.tx_broadcaster.txn_broadcasted.lock().unwrap();
1184
1185         assert!(node_txn.len() >= 1);
1186         assert_eq!(node_txn[0].input.len(), 1);
1187         let mut found_prev = false;
1188
1189         for tx in prev_txn {
1190                 if node_txn[0].input[0].previous_output.txid == tx.txid() {
1191                         check_spends!(node_txn[0], tx);
1192                         assert!(node_txn[0].input[0].witness[2].len() > 106); // must spend an htlc output
1193                         assert_eq!(tx.input.len(), 1); // must spend a commitment tx
1194
1195                         found_prev = true;
1196                         break;
1197                 }
1198         }
1199         assert!(found_prev);
1200
1201         let mut res = Vec::new();
1202         mem::swap(&mut *node_txn, &mut res);
1203         res
1204 }
1205
1206 pub fn get_announce_close_broadcast_events<'a, 'b, 'c>(nodes: &Vec<Node<'a, 'b, 'c>>, a: usize, b: usize)  {
1207         let events_1 = nodes[a].node.get_and_clear_pending_msg_events();
1208         assert_eq!(events_1.len(), 1);
1209         let as_update = match events_1[0] {
1210                 MessageSendEvent::BroadcastChannelUpdate { ref msg } => {
1211                         msg.clone()
1212                 },
1213                 _ => panic!("Unexpected event"),
1214         };
1215
1216         let events_2 = nodes[b].node.get_and_clear_pending_msg_events();
1217         assert_eq!(events_2.len(), 1);
1218         let bs_update = match events_2[0] {
1219                 MessageSendEvent::BroadcastChannelUpdate { ref msg } => {
1220                         msg.clone()
1221                 },
1222                 _ => panic!("Unexpected event"),
1223         };
1224
1225         for node in nodes {
1226                 node.router.handle_channel_update(&as_update).unwrap();
1227                 node.router.handle_channel_update(&bs_update).unwrap();
1228         }
1229 }
1230
1231 macro_rules! get_channel_value_stat {
1232         ($node: expr, $channel_id: expr) => {{
1233                 let chan_lock = $node.node.channel_state.lock().unwrap();
1234                 let chan = chan_lock.by_id.get(&$channel_id).unwrap();
1235                 chan.get_value_stat()
1236         }}
1237 }
1238
1239 macro_rules! get_chan_reestablish_msgs {
1240         ($src_node: expr, $dst_node: expr) => {
1241                 {
1242                         let mut res = Vec::with_capacity(1);
1243                         for msg in $src_node.node.get_and_clear_pending_msg_events() {
1244                                 if let MessageSendEvent::SendChannelReestablish { ref node_id, ref msg } = msg {
1245                                         assert_eq!(*node_id, $dst_node.node.get_our_node_id());
1246                                         res.push(msg.clone());
1247                                 } else {
1248                                         panic!("Unexpected event")
1249                                 }
1250                         }
1251                         res
1252                 }
1253         }
1254 }
1255
1256 macro_rules! handle_chan_reestablish_msgs {
1257         ($src_node: expr, $dst_node: expr) => {
1258                 {
1259                         let msg_events = $src_node.node.get_and_clear_pending_msg_events();
1260                         let mut idx = 0;
1261                         let funding_locked = if let Some(&MessageSendEvent::SendFundingLocked { ref node_id, ref msg }) = msg_events.get(0) {
1262                                 idx += 1;
1263                                 assert_eq!(*node_id, $dst_node.node.get_our_node_id());
1264                                 Some(msg.clone())
1265                         } else {
1266                                 None
1267                         };
1268
1269                         let mut revoke_and_ack = None;
1270                         let mut commitment_update = None;
1271                         let order = if let Some(ev) = msg_events.get(idx) {
1272                                 idx += 1;
1273                                 match ev {
1274                                         &MessageSendEvent::SendRevokeAndACK { ref node_id, ref msg } => {
1275                                                 assert_eq!(*node_id, $dst_node.node.get_our_node_id());
1276                                                 revoke_and_ack = Some(msg.clone());
1277                                                 RAACommitmentOrder::RevokeAndACKFirst
1278                                         },
1279                                         &MessageSendEvent::UpdateHTLCs { ref node_id, ref updates } => {
1280                                                 assert_eq!(*node_id, $dst_node.node.get_our_node_id());
1281                                                 commitment_update = Some(updates.clone());
1282                                                 RAACommitmentOrder::CommitmentFirst
1283                                         },
1284                                         _ => panic!("Unexpected event"),
1285                                 }
1286                         } else {
1287                                 RAACommitmentOrder::CommitmentFirst
1288                         };
1289
1290                         if let Some(ev) = msg_events.get(idx) {
1291                                 match ev {
1292                                         &MessageSendEvent::SendRevokeAndACK { ref node_id, ref msg } => {
1293                                                 assert_eq!(*node_id, $dst_node.node.get_our_node_id());
1294                                                 assert!(revoke_and_ack.is_none());
1295                                                 revoke_and_ack = Some(msg.clone());
1296                                         },
1297                                         &MessageSendEvent::UpdateHTLCs { ref node_id, ref updates } => {
1298                                                 assert_eq!(*node_id, $dst_node.node.get_our_node_id());
1299                                                 assert!(commitment_update.is_none());
1300                                                 commitment_update = Some(updates.clone());
1301                                         },
1302                                         _ => panic!("Unexpected event"),
1303                                 }
1304                         }
1305
1306                         (funding_locked, revoke_and_ack, commitment_update, order)
1307                 }
1308         }
1309 }
1310
1311 /// pending_htlc_adds includes both the holding cell and in-flight update_add_htlcs, whereas
1312 /// for claims/fails they are separated out.
1313 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))  {
1314         node_a.node.peer_connected(&node_b.node.get_our_node_id(), &msgs::Init { features: InitFeatures::empty() });
1315         let reestablish_1 = get_chan_reestablish_msgs!(node_a, node_b);
1316         node_b.node.peer_connected(&node_a.node.get_our_node_id(), &msgs::Init { features: InitFeatures::empty() });
1317         let reestablish_2 = get_chan_reestablish_msgs!(node_b, node_a);
1318
1319         if send_funding_locked.0 {
1320                 // If a expects a funding_locked, it better not think it has received a revoke_and_ack
1321                 // from b
1322                 for reestablish in reestablish_1.iter() {
1323                         assert_eq!(reestablish.next_remote_commitment_number, 0);
1324                 }
1325         }
1326         if send_funding_locked.1 {
1327                 // If b expects a funding_locked, it better not think it has received a revoke_and_ack
1328                 // from a
1329                 for reestablish in reestablish_2.iter() {
1330                         assert_eq!(reestablish.next_remote_commitment_number, 0);
1331                 }
1332         }
1333         if send_funding_locked.0 || send_funding_locked.1 {
1334                 // If we expect any funding_locked's, both sides better have set
1335                 // next_local_commitment_number to 1
1336                 for reestablish in reestablish_1.iter() {
1337                         assert_eq!(reestablish.next_local_commitment_number, 1);
1338                 }
1339                 for reestablish in reestablish_2.iter() {
1340                         assert_eq!(reestablish.next_local_commitment_number, 1);
1341                 }
1342         }
1343
1344         let mut resp_1 = Vec::new();
1345         for msg in reestablish_1 {
1346                 node_b.node.handle_channel_reestablish(&node_a.node.get_our_node_id(), &msg);
1347                 resp_1.push(handle_chan_reestablish_msgs!(node_b, node_a));
1348         }
1349         if pending_cell_htlc_claims.0 != 0 || pending_cell_htlc_fails.0 != 0 {
1350                 check_added_monitors!(node_b, 1);
1351         } else {
1352                 check_added_monitors!(node_b, 0);
1353         }
1354
1355         let mut resp_2 = Vec::new();
1356         for msg in reestablish_2 {
1357                 node_a.node.handle_channel_reestablish(&node_b.node.get_our_node_id(), &msg);
1358                 resp_2.push(handle_chan_reestablish_msgs!(node_a, node_b));
1359         }
1360         if pending_cell_htlc_claims.1 != 0 || pending_cell_htlc_fails.1 != 0 {
1361                 check_added_monitors!(node_a, 1);
1362         } else {
1363                 check_added_monitors!(node_a, 0);
1364         }
1365
1366         // We don't yet support both needing updates, as that would require a different commitment dance:
1367         assert!((pending_htlc_adds.0 == 0 && pending_htlc_claims.0 == 0 && pending_cell_htlc_claims.0 == 0 && pending_cell_htlc_fails.0 == 0) ||
1368                         (pending_htlc_adds.1 == 0 && pending_htlc_claims.1 == 0 && pending_cell_htlc_claims.1 == 0 && pending_cell_htlc_fails.1 == 0));
1369
1370         for chan_msgs in resp_1.drain(..) {
1371                 if send_funding_locked.0 {
1372                         node_a.node.handle_funding_locked(&node_b.node.get_our_node_id(), &chan_msgs.0.unwrap());
1373                         let announcement_event = node_a.node.get_and_clear_pending_msg_events();
1374                         if !announcement_event.is_empty() {
1375                                 assert_eq!(announcement_event.len(), 1);
1376                                 if let MessageSendEvent::SendAnnouncementSignatures { .. } = announcement_event[0] {
1377                                         //TODO: Test announcement_sigs re-sending
1378                                 } else { panic!("Unexpected event!"); }
1379                         }
1380                 } else {
1381                         assert!(chan_msgs.0.is_none());
1382                 }
1383                 if pending_raa.0 {
1384                         assert!(chan_msgs.3 == RAACommitmentOrder::RevokeAndACKFirst);
1385                         node_a.node.handle_revoke_and_ack(&node_b.node.get_our_node_id(), &chan_msgs.1.unwrap());
1386                         assert!(node_a.node.get_and_clear_pending_msg_events().is_empty());
1387                         check_added_monitors!(node_a, 1);
1388                 } else {
1389                         assert!(chan_msgs.1.is_none());
1390                 }
1391                 if pending_htlc_adds.0 != 0 || pending_htlc_claims.0 != 0 || pending_cell_htlc_claims.0 != 0 || pending_cell_htlc_fails.0 != 0 {
1392                         let commitment_update = chan_msgs.2.unwrap();
1393                         if pending_htlc_adds.0 != -1 { // We use -1 to denote a response commitment_signed
1394                                 assert_eq!(commitment_update.update_add_htlcs.len(), pending_htlc_adds.0 as usize);
1395                         } else {
1396                                 assert!(commitment_update.update_add_htlcs.is_empty());
1397                         }
1398                         assert_eq!(commitment_update.update_fulfill_htlcs.len(), pending_htlc_claims.0 + pending_cell_htlc_claims.0);
1399                         assert_eq!(commitment_update.update_fail_htlcs.len(), pending_cell_htlc_fails.0);
1400                         assert!(commitment_update.update_fail_malformed_htlcs.is_empty());
1401                         for update_add in commitment_update.update_add_htlcs {
1402                                 node_a.node.handle_update_add_htlc(&node_b.node.get_our_node_id(), &update_add);
1403                         }
1404                         for update_fulfill in commitment_update.update_fulfill_htlcs {
1405                                 node_a.node.handle_update_fulfill_htlc(&node_b.node.get_our_node_id(), &update_fulfill);
1406                         }
1407                         for update_fail in commitment_update.update_fail_htlcs {
1408                                 node_a.node.handle_update_fail_htlc(&node_b.node.get_our_node_id(), &update_fail);
1409                         }
1410
1411                         if pending_htlc_adds.0 != -1 { // We use -1 to denote a response commitment_signed
1412                                 commitment_signed_dance!(node_a, node_b, commitment_update.commitment_signed, false);
1413                         } else {
1414                                 node_a.node.handle_commitment_signed(&node_b.node.get_our_node_id(), &commitment_update.commitment_signed);
1415                                 check_added_monitors!(node_a, 1);
1416                                 let as_revoke_and_ack = get_event_msg!(node_a, MessageSendEvent::SendRevokeAndACK, node_b.node.get_our_node_id());
1417                                 // No commitment_signed so get_event_msg's assert(len == 1) passes
1418                                 node_b.node.handle_revoke_and_ack(&node_a.node.get_our_node_id(), &as_revoke_and_ack);
1419                                 assert!(node_b.node.get_and_clear_pending_msg_events().is_empty());
1420                                 check_added_monitors!(node_b, 1);
1421                         }
1422                 } else {
1423                         assert!(chan_msgs.2.is_none());
1424                 }
1425         }
1426
1427         for chan_msgs in resp_2.drain(..) {
1428                 if send_funding_locked.1 {
1429                         node_b.node.handle_funding_locked(&node_a.node.get_our_node_id(), &chan_msgs.0.unwrap());
1430                         let announcement_event = node_b.node.get_and_clear_pending_msg_events();
1431                         if !announcement_event.is_empty() {
1432                                 assert_eq!(announcement_event.len(), 1);
1433                                 if let MessageSendEvent::SendAnnouncementSignatures { .. } = announcement_event[0] {
1434                                         //TODO: Test announcement_sigs re-sending
1435                                 } else { panic!("Unexpected event!"); }
1436                         }
1437                 } else {
1438                         assert!(chan_msgs.0.is_none());
1439                 }
1440                 if pending_raa.1 {
1441                         assert!(chan_msgs.3 == RAACommitmentOrder::RevokeAndACKFirst);
1442                         node_b.node.handle_revoke_and_ack(&node_a.node.get_our_node_id(), &chan_msgs.1.unwrap());
1443                         assert!(node_b.node.get_and_clear_pending_msg_events().is_empty());
1444                         check_added_monitors!(node_b, 1);
1445                 } else {
1446                         assert!(chan_msgs.1.is_none());
1447                 }
1448                 if pending_htlc_adds.1 != 0 || pending_htlc_claims.1 != 0 || pending_cell_htlc_claims.1 != 0 || pending_cell_htlc_fails.1 != 0 {
1449                         let commitment_update = chan_msgs.2.unwrap();
1450                         if pending_htlc_adds.1 != -1 { // We use -1 to denote a response commitment_signed
1451                                 assert_eq!(commitment_update.update_add_htlcs.len(), pending_htlc_adds.1 as usize);
1452                         }
1453                         assert_eq!(commitment_update.update_fulfill_htlcs.len(), pending_htlc_claims.0 + pending_cell_htlc_claims.0);
1454                         assert_eq!(commitment_update.update_fail_htlcs.len(), pending_cell_htlc_fails.0);
1455                         assert!(commitment_update.update_fail_malformed_htlcs.is_empty());
1456                         for update_add in commitment_update.update_add_htlcs {
1457                                 node_b.node.handle_update_add_htlc(&node_a.node.get_our_node_id(), &update_add);
1458                         }
1459                         for update_fulfill in commitment_update.update_fulfill_htlcs {
1460                                 node_b.node.handle_update_fulfill_htlc(&node_a.node.get_our_node_id(), &update_fulfill);
1461                         }
1462                         for update_fail in commitment_update.update_fail_htlcs {
1463                                 node_b.node.handle_update_fail_htlc(&node_a.node.get_our_node_id(), &update_fail);
1464                         }
1465
1466                         if pending_htlc_adds.1 != -1 { // We use -1 to denote a response commitment_signed
1467                                 commitment_signed_dance!(node_b, node_a, commitment_update.commitment_signed, false);
1468                         } else {
1469                                 node_b.node.handle_commitment_signed(&node_a.node.get_our_node_id(), &commitment_update.commitment_signed);
1470                                 check_added_monitors!(node_b, 1);
1471                                 let bs_revoke_and_ack = get_event_msg!(node_b, MessageSendEvent::SendRevokeAndACK, node_a.node.get_our_node_id());
1472                                 // No commitment_signed so get_event_msg's assert(len == 1) passes
1473                                 node_a.node.handle_revoke_and_ack(&node_b.node.get_our_node_id(), &bs_revoke_and_ack);
1474                                 assert!(node_a.node.get_and_clear_pending_msg_events().is_empty());
1475                                 check_added_monitors!(node_a, 1);
1476                         }
1477                 } else {
1478                         assert!(chan_msgs.2.is_none());
1479                 }
1480         }
1481 }