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

   1 // This file is Copyright its original authors, visible in version control
   2 // history.
   3 //
   4 // This file is licensed under the Apache License, Version 2.0 <LICENSE-APACHE
   5 // or http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   6 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your option.
   7 // You may not use this file except in accordance with one or both of these
   8 // licenses.
   9
  10 //! A bunch of useful utilities for building networks of nodes and exchanging messages between
  11 //! nodes for functional tests.
  12
  13 use crate::chain::{BestBlock, ChannelMonitorUpdateStatus, Confirm, Listen, Watch, keysinterface::KeysInterface};
  14 use crate::chain::channelmonitor::ChannelMonitor;
  15 use crate::chain::transaction::OutPoint;
  16 use crate::ln::{PaymentPreimage, PaymentHash, PaymentSecret};
  17 use crate::ln::channelmanager::{self, ChainParameters, ChannelManager, ChannelManagerReadArgs, RAACommitmentOrder, PaymentSendFailure, PaymentId, MIN_CLTV_EXPIRY_DELTA};
  18 use crate::routing::gossip::{P2PGossipSync, NetworkGraph, NetworkUpdate};
  19 use crate::routing::router::{PaymentParameters, Route, get_route};
  20 use crate::ln::features::InitFeatures;
  21 use crate::ln::msgs;
  22 use crate::ln::msgs::{ChannelMessageHandler,RoutingMessageHandler};
  23 use crate::util::enforcing_trait_impls::EnforcingSigner;
  24 use crate::util::scid_utils;
  25 use crate::util::test_utils;
  26 use crate::util::test_utils::{panicking, TestChainMonitor};
  27 use crate::util::events::{Event, HTLCDestination, MessageSendEvent, MessageSendEventsProvider, PaymentPurpose};
  28 use crate::util::errors::APIError;
  29 use crate::util::config::UserConfig;
  30 use crate::util::ser::{ReadableArgs, Writeable};
  31
  32 use bitcoin::blockdata::block::{Block, BlockHeader};
  33 use bitcoin::blockdata::constants::genesis_block;
  34 use bitcoin::blockdata::transaction::{Transaction, TxOut};
  35 use bitcoin::network::constants::Network;
  36
  37 use bitcoin::hash_types::BlockHash;
  38 use bitcoin::hashes::sha256::Hash as Sha256;
  39 use bitcoin::hashes::Hash as _;
  40
  41 use bitcoin::secp256k1::PublicKey;
  42
  43 use crate::io;
  44 use crate::prelude::*;
  45 use core::cell::RefCell;
  46 use alloc::rc::Rc;
  47 use crate::sync::{Arc, Mutex};
  48 use core::mem;
  49 use core::iter::repeat;
  50 use bitcoin::{PackedLockTime, TxMerkleNode};
  51
  52 pub const CHAN_CONFIRM_DEPTH: u32 = 10;
  53
  54 /// Mine the given transaction in the next block and then mine CHAN_CONFIRM_DEPTH - 1 blocks on
  55 /// top, giving the given transaction CHAN_CONFIRM_DEPTH confirmations.
  56 ///
  57 /// Returns the SCID a channel confirmed in the given transaction will have, assuming the funding
  58 /// output is the 1st output in the transaction.
  59 pub fn confirm_transaction<'a, 'b, 'c, 'd>(node: &'a Node<'b, 'c, 'd>, tx: &Transaction) -> u64 {
  60         let scid = confirm_transaction_at(node, tx, node.best_block_info().1 + 1);
  61         connect_blocks(node, CHAN_CONFIRM_DEPTH - 1);
  62         scid
  63 }
  64 /// Mine a signle block containing the given transaction
  65 pub fn mine_transaction<'a, 'b, 'c, 'd>(node: &'a Node<'b, 'c, 'd>, tx: &Transaction) {
  66         let height = node.best_block_info().1 + 1;
  67         confirm_transaction_at(node, tx, height);
  68 }
  69 /// Mine the given transaction at the given height, mining blocks as required to build to that
  70 /// height
  71 ///
  72 /// Returns the SCID a channel confirmed in the given transaction will have, assuming the funding
  73 /// output is the 1st output in the transaction.
  74 pub fn confirm_transaction_at<'a, 'b, 'c, 'd>(node: &'a Node<'b, 'c, 'd>, tx: &Transaction, conf_height: u32) -> u64 {
  75         let first_connect_height = node.best_block_info().1 + 1;
  76         assert!(first_connect_height <= conf_height);
  77         if conf_height > first_connect_height {
  78                 connect_blocks(node, conf_height - first_connect_height);
  79         }
  80         let mut block = Block {
  81                 header: BlockHeader { version: 0x20000000, prev_blockhash: node.best_block_hash(), merkle_root: TxMerkleNode::all_zeros(), time: conf_height, bits: 42, nonce: 42 },
  82                 txdata: Vec::new(),
  83         };
  84         for _ in 0..*node.network_chan_count.borrow() { // Make sure we don't end up with channels at the same short id by offsetting by chan_count
  85                 block.txdata.push(Transaction { version: 0, lock_time: PackedLockTime::ZERO, input: Vec::new(), output: Vec::new() });
  86         }
  87         block.txdata.push(tx.clone());
  88         connect_block(node, &block);
  89         scid_utils::scid_from_parts(conf_height as u64, block.txdata.len() as u64 - 1, 0).unwrap()
  90 }
  91
  92 /// The possible ways we may notify a ChannelManager of a new block
  93 #[derive(Clone, Copy, Debug, PartialEq)]
  94 pub enum ConnectStyle {
  95         /// Calls `best_block_updated` first, detecting transactions in the block only after receiving
  96         /// the header and height information.
  97         BestBlockFirst,
  98         /// The same as `BestBlockFirst`, however when we have multiple blocks to connect, we only
  99         /// make a single `best_block_updated` call.
 100         BestBlockFirstSkippingBlocks,
 101         /// The same as `BestBlockFirst` when connecting blocks. During disconnection only
 102         /// `transaction_unconfirmed` is called.
 103         BestBlockFirstReorgsOnlyTip,
 104         /// Calls `transactions_confirmed` first, detecting transactions in the block before updating
 105         /// the header and height information.
 106         TransactionsFirst,
 107         /// The same as `TransactionsFirst`, however when we have multiple blocks to connect, we only
 108         /// make a single `best_block_updated` call.
 109         TransactionsFirstSkippingBlocks,
 110         /// The same as `TransactionsFirst` when connecting blocks. During disconnection only
 111         /// `transaction_unconfirmed` is called.
 112         TransactionsFirstReorgsOnlyTip,
 113         /// Provides the full block via the `chain::Listen` interface. In the current code this is
 114         /// equivalent to `TransactionsFirst` with some additional assertions.
 115         FullBlockViaListen,
 116 }
 117
 118 impl ConnectStyle {
 119         fn random_style() -> ConnectStyle {
 120                 #[cfg(feature = "std")] {
 121                         use core::hash::{BuildHasher, Hasher};
 122                         // Get a random value using the only std API to do so - the DefaultHasher
 123                         let rand_val = std::collections::hash_map::RandomState::new().build_hasher().finish();
 124                         let res = match rand_val % 7 {
 125                                 0 => ConnectStyle::BestBlockFirst,
 126                                 1 => ConnectStyle::BestBlockFirstSkippingBlocks,
 127                                 2 => ConnectStyle::BestBlockFirstReorgsOnlyTip,
 128                                 3 => ConnectStyle::TransactionsFirst,
 129                                 4 => ConnectStyle::TransactionsFirstSkippingBlocks,
 130                                 5 => ConnectStyle::TransactionsFirstReorgsOnlyTip,
 131                                 6 => ConnectStyle::FullBlockViaListen,
 132                                 _ => unreachable!(),
 133                         };
 134                         eprintln!("Using Block Connection Style: {:?}", res);
 135                         res
 136                 }
 137                 #[cfg(not(feature = "std"))] {
 138                         ConnectStyle::FullBlockViaListen
 139                 }
 140         }
 141 }
 142
 143 pub fn connect_blocks<'a, 'b, 'c, 'd>(node: &'a Node<'b, 'c, 'd>, depth: u32) -> BlockHash {
 144         let skip_intermediaries = match *node.connect_style.borrow() {
 145                 ConnectStyle::BestBlockFirstSkippingBlocks|ConnectStyle::TransactionsFirstSkippingBlocks|
 146                         ConnectStyle::BestBlockFirstReorgsOnlyTip|ConnectStyle::TransactionsFirstReorgsOnlyTip => true,
 147                 _ => false,
 148         };
 149
 150         let height = node.best_block_info().1 + 1;
 151         let mut block = Block {
 152                 header: BlockHeader { version: 0x2000000, prev_blockhash: node.best_block_hash(), merkle_root: TxMerkleNode::all_zeros(), time: height, bits: 42, nonce: 42 },
 153                 txdata: vec![],
 154         };
 155         assert!(depth >= 1);
 156         for i in 1..depth {
 157                 let prev_blockhash = block.header.block_hash();
 158                 do_connect_block(node, block, skip_intermediaries);
 159                 block = Block {
 160                         header: BlockHeader { version: 0x20000000, prev_blockhash, merkle_root: TxMerkleNode::all_zeros(), time: height + i, bits: 42, nonce: 42 },
 161                         txdata: vec![],
 162                 };
 163         }
 164         let hash = block.header.block_hash();
 165         do_connect_block(node, block, false);
 166         hash
 167 }
 168
 169 pub fn connect_block<'a, 'b, 'c, 'd>(node: &'a Node<'b, 'c, 'd>, block: &Block) {
 170         do_connect_block(node, block.clone(), false);
 171 }
 172
 173 fn call_claimable_balances<'a, 'b, 'c, 'd>(node: &'a Node<'b, 'c, 'd>) {
 174         // Ensure `get_claimable_balances`' self-tests never panic
 175         for funding_outpoint in node.chain_monitor.chain_monitor.list_monitors() {
 176                 node.chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances();
 177         }
 178 }
 179
 180 fn do_connect_block<'a, 'b, 'c, 'd>(node: &'a Node<'b, 'c, 'd>, block: Block, skip_intermediaries: bool) {
 181         call_claimable_balances(node);
 182         let height = node.best_block_info().1 + 1;
 183         #[cfg(feature = "std")] {
 184                 eprintln!("Connecting block using Block Connection Style: {:?}", *node.connect_style.borrow());
 185         }
 186         if !skip_intermediaries {
 187                 let txdata: Vec<_> = block.txdata.iter().enumerate().collect();
 188                 match *node.connect_style.borrow() {
 189                         ConnectStyle::BestBlockFirst|ConnectStyle::BestBlockFirstSkippingBlocks|ConnectStyle::BestBlockFirstReorgsOnlyTip => {
 190                                 node.chain_monitor.chain_monitor.best_block_updated(&block.header, height);
 191                                 call_claimable_balances(node);
 192                                 node.chain_monitor.chain_monitor.transactions_confirmed(&block.header, &txdata, height);
 193                                 node.node.best_block_updated(&block.header, height);
 194                                 node.node.transactions_confirmed(&block.header, &txdata, height);
 195                         },
 196                         ConnectStyle::TransactionsFirst|ConnectStyle::TransactionsFirstSkippingBlocks|ConnectStyle::TransactionsFirstReorgsOnlyTip => {
 197                                 node.chain_monitor.chain_monitor.transactions_confirmed(&block.header, &txdata, height);
 198                                 call_claimable_balances(node);
 199                                 node.chain_monitor.chain_monitor.best_block_updated(&block.header, height);
 200                                 node.node.transactions_confirmed(&block.header, &txdata, height);
 201                                 node.node.best_block_updated(&block.header, height);
 202                         },
 203                         ConnectStyle::FullBlockViaListen => {
 204                                 node.chain_monitor.chain_monitor.block_connected(&block, height);
 205                                 node.node.block_connected(&block, height);
 206                         }
 207                 }
 208         }
 209         call_claimable_balances(node);
 210         node.node.test_process_background_events();
 211         node.blocks.lock().unwrap().push((block, height));
 212 }
 213
 214 pub fn disconnect_blocks<'a, 'b, 'c, 'd>(node: &'a Node<'b, 'c, 'd>, count: u32) {
 215         call_claimable_balances(node);
 216         #[cfg(feature = "std")] {
 217                 eprintln!("Disconnecting {} blocks using Block Connection Style: {:?}", count, *node.connect_style.borrow());
 218         }
 219         for i in 0..count {
 220                 let orig = node.blocks.lock().unwrap().pop().unwrap();
 221                 assert!(orig.1 > 0); // Cannot disconnect genesis
 222                 let prev = node.blocks.lock().unwrap().last().unwrap().clone();
 223
 224                 match *node.connect_style.borrow() {
 225                         ConnectStyle::FullBlockViaListen => {
 226                                 node.chain_monitor.chain_monitor.block_disconnected(&orig.0.header, orig.1);
 227                                 Listen::block_disconnected(node.node, &orig.0.header, orig.1);
 228                         },
 229                         ConnectStyle::BestBlockFirstSkippingBlocks|ConnectStyle::TransactionsFirstSkippingBlocks => {
 230                                 if i == count - 1 {
 231                                         node.chain_monitor.chain_monitor.best_block_updated(&prev.0.header, prev.1);
 232                                         node.node.best_block_updated(&prev.0.header, prev.1);
 233                                 }
 234                         },
 235                         ConnectStyle::BestBlockFirstReorgsOnlyTip|ConnectStyle::TransactionsFirstReorgsOnlyTip => {
 236                                 for tx in orig.0.txdata {
 237                                         node.chain_monitor.chain_monitor.transaction_unconfirmed(&tx.txid());
 238                                         node.node.transaction_unconfirmed(&tx.txid());
 239                                 }
 240                         },
 241                         _ => {
 242                                 node.chain_monitor.chain_monitor.best_block_updated(&prev.0.header, prev.1);
 243                                 node.node.best_block_updated(&prev.0.header, prev.1);
 244                         },
 245                 }
 246                 call_claimable_balances(node);
 247         }
 248 }
 249
 250 pub fn disconnect_all_blocks<'a, 'b, 'c, 'd>(node: &'a Node<'b, 'c, 'd>) {
 251         let count = node.blocks.lock().unwrap().len() as u32 - 1;
 252         disconnect_blocks(node, count);
 253 }
 254
 255 pub struct TestChanMonCfg {
 256         pub tx_broadcaster: test_utils::TestBroadcaster,
 257         pub fee_estimator: test_utils::TestFeeEstimator,
 258         pub chain_source: test_utils::TestChainSource,
 259         pub persister: test_utils::TestPersister,
 260         pub logger: test_utils::TestLogger,
 261         pub keys_manager: test_utils::TestKeysInterface,
 262 }
 263
 264 pub struct NodeCfg<'a> {
 265         pub chain_source: &'a test_utils::TestChainSource,
 266         pub tx_broadcaster: &'a test_utils::TestBroadcaster,
 267         pub fee_estimator: &'a test_utils::TestFeeEstimator,
 268         pub chain_monitor: test_utils::TestChainMonitor<'a>,
 269         pub keys_manager: &'a test_utils::TestKeysInterface,
 270         pub logger: &'a test_utils::TestLogger,
 271         pub network_graph: NetworkGraph<&'a test_utils::TestLogger>,
 272         pub node_seed: [u8; 32],
 273         pub features: InitFeatures,
 274 }
 275
 276 pub struct Node<'a, 'b: 'a, 'c: 'b> {
 277         pub chain_source: &'c test_utils::TestChainSource,
 278         pub tx_broadcaster: &'c test_utils::TestBroadcaster,
 279         pub chain_monitor: &'b test_utils::TestChainMonitor<'c>,
 280         pub keys_manager: &'b test_utils::TestKeysInterface,
 281         pub node: &'a ChannelManager<&'b TestChainMonitor<'c>, &'c test_utils::TestBroadcaster, &'b test_utils::TestKeysInterface, &'c test_utils::TestFeeEstimator, &'c test_utils::TestLogger>,
 282         pub network_graph: &'b NetworkGraph<&'c test_utils::TestLogger>,
 283         pub gossip_sync: P2PGossipSync<&'b NetworkGraph<&'c test_utils::TestLogger>, &'c test_utils::TestChainSource, &'c test_utils::TestLogger>,
 284         pub node_seed: [u8; 32],
 285         pub network_payment_count: Rc<RefCell<u8>>,
 286         pub network_chan_count: Rc<RefCell<u32>>,
 287         pub logger: &'c test_utils::TestLogger,
 288         pub blocks: Arc<Mutex<Vec<(Block, u32)>>>,
 289         pub connect_style: Rc<RefCell<ConnectStyle>>,
 290 }
 291 impl<'a, 'b, 'c> Node<'a, 'b, 'c> {
 292         pub fn best_block_hash(&self) -> BlockHash {
 293                 self.blocks.lock().unwrap().last().unwrap().0.block_hash()
 294         }
 295         pub fn best_block_info(&self) -> (BlockHash, u32) {
 296                 self.blocks.lock().unwrap().last().map(|(a, b)| (a.block_hash(), *b)).unwrap()
 297         }
 298         pub fn get_block_header(&self, height: u32) -> BlockHeader {
 299                 self.blocks.lock().unwrap()[height as usize].0.header
 300         }
 301 }
 302
 303 impl<'a, 'b, 'c> Drop for Node<'a, 'b, 'c> {
 304         fn drop(&mut self) {
 305                 if !panicking() {
 306                         // Check that we processed all pending events
 307                         let msg_events = self.node.get_and_clear_pending_msg_events();
 308                         if !msg_events.is_empty() {
 309                                 panic!("Had excess message events on node {}: {:?}", self.logger.id, msg_events);
 310                         }
 311                         let events = self.node.get_and_clear_pending_events();
 312                         if !events.is_empty() {
 313                                 panic!("Had excess events on node {}: {:?}", self.logger.id, events);
 314                         }
 315                         let added_monitors = self.chain_monitor.added_monitors.lock().unwrap().split_off(0);
 316                         if !added_monitors.is_empty() {
 317                                 panic!("Had {} excess added monitors on node {}", added_monitors.len(), self.logger.id);
 318                         }
 319
 320                         // Check that if we serialize the Router, we can deserialize it again.
 321                         {
 322                                 let mut w = test_utils::TestVecWriter(Vec::new());
 323                                 self.network_graph.write(&mut w).unwrap();
 324                                 let network_graph_deser = <NetworkGraph<_>>::read(&mut io::Cursor::new(&w.0), self.logger).unwrap();
 325                                 assert!(network_graph_deser == *self.network_graph);
 326                                 let gossip_sync = P2PGossipSync::new(
 327                                         &network_graph_deser, Some(self.chain_source), self.logger
 328                                 );
 329                                 let mut chan_progress = 0;
 330                                 loop {
 331                                         let orig_announcements = self.gossip_sync.get_next_channel_announcement(chan_progress);
 332                                         let deserialized_announcements = gossip_sync.get_next_channel_announcement(chan_progress);
 333                                         assert!(orig_announcements == deserialized_announcements);
 334                                         chan_progress = match orig_announcements {
 335                                                 Some(announcement) => announcement.0.contents.short_channel_id + 1,
 336                                                 None => break,
 337                                         };
 338                                 }
 339                                 let mut node_progress = None;
 340                                 loop {
 341                                         let orig_announcements = self.gossip_sync.get_next_node_announcement(node_progress.as_ref());
 342                                         let deserialized_announcements = gossip_sync.get_next_node_announcement(node_progress.as_ref());
 343                                         assert!(orig_announcements == deserialized_announcements);
 344                                         node_progress = match orig_announcements {
 345                                                 Some(announcement) => Some(announcement.contents.node_id),
 346                                                 None => break,
 347                                         };
 348                                 }
 349                         }
 350
 351                         // Check that if we serialize and then deserialize all our channel monitors we get the
 352                         // same set of outputs to watch for on chain as we have now. Note that if we write
 353                         // tests that fully close channels and remove the monitors at some point this may break.
 354                         let feeest = test_utils::TestFeeEstimator { sat_per_kw: Mutex::new(253) };
 355                         let mut deserialized_monitors = Vec::new();
 356                         {
 357                                 for outpoint in self.chain_monitor.chain_monitor.list_monitors() {
 358                                         let mut w = test_utils::TestVecWriter(Vec::new());
 359                                         self.chain_monitor.chain_monitor.get_monitor(outpoint).unwrap().write(&mut w).unwrap();
 360                                         let (_, deserialized_monitor) = <(BlockHash, ChannelMonitor<EnforcingSigner>)>::read(
 361                                                 &mut io::Cursor::new(&w.0), self.keys_manager).unwrap();
 362                                         deserialized_monitors.push(deserialized_monitor);
 363                                 }
 364                         }
 365
 366                         let broadcaster = test_utils::TestBroadcaster {
 367                                 txn_broadcasted: Mutex::new(self.tx_broadcaster.txn_broadcasted.lock().unwrap().clone()),
 368                                 blocks: Arc::new(Mutex::new(self.tx_broadcaster.blocks.lock().unwrap().clone())),
 369                         };
 370
 371                         // Before using all the new monitors to check the watch outpoints, use the full set of
 372                         // them to ensure we can write and reload our ChannelManager.
 373                         {
 374                                 let mut channel_monitors = HashMap::new();
 375                                 for monitor in deserialized_monitors.iter_mut() {
 376                                         channel_monitors.insert(monitor.get_funding_txo().0, monitor);
 377                                 }
 378
 379                                 let mut w = test_utils::TestVecWriter(Vec::new());
 380                                 self.node.write(&mut w).unwrap();
 381                                 <(BlockHash, ChannelManager<&test_utils::TestChainMonitor, &test_utils::TestBroadcaster, &test_utils::TestKeysInterface, &test_utils::TestFeeEstimator, &test_utils::TestLogger>)>::read(&mut io::Cursor::new(w.0), ChannelManagerReadArgs {
 382                                         default_config: *self.node.get_current_default_configuration(),
 383                                         keys_manager: self.keys_manager,
 384                                         fee_estimator: &test_utils::TestFeeEstimator { sat_per_kw: Mutex::new(253) },
 385                                         chain_monitor: self.chain_monitor,
 386                                         tx_broadcaster: &broadcaster,
 387                                         logger: &self.logger,
 388                                         channel_monitors,
 389                                 }).unwrap();
 390                         }
 391
 392                         let persister = test_utils::TestPersister::new();
 393                         let chain_source = test_utils::TestChainSource::new(Network::Testnet);
 394                         let chain_monitor = test_utils::TestChainMonitor::new(Some(&chain_source), &broadcaster, &self.logger, &feeest, &persister, &self.keys_manager);
 395                         for deserialized_monitor in deserialized_monitors.drain(..) {
 396                                 if chain_monitor.watch_channel(deserialized_monitor.get_funding_txo().0, deserialized_monitor) != ChannelMonitorUpdateStatus::Completed {
 397                                         panic!();
 398                                 }
 399                         }
 400                         assert_eq!(*chain_source.watched_txn.lock().unwrap(), *self.chain_source.watched_txn.lock().unwrap());
 401                         assert_eq!(*chain_source.watched_outputs.lock().unwrap(), *self.chain_source.watched_outputs.lock().unwrap());
 402                 }
 403         }
 404 }
 405
 406 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) {
 407         create_chan_between_nodes_with_value(node_a, node_b, 100000, 10001, a_flags, b_flags)
 408 }
 409
 410 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) {
 411         let (channel_ready, channel_id, tx) = create_chan_between_nodes_with_value_a(node_a, node_b, channel_value, push_msat, a_flags, b_flags);
 412         let (announcement, as_update, bs_update) = create_chan_between_nodes_with_value_b(node_a, node_b, &channel_ready);
 413         (announcement, as_update, bs_update, channel_id, tx)
 414 }
 415
 416 #[macro_export]
 417 /// Gets an RAA and CS which were sent in response to a commitment update
 418 macro_rules! get_revoke_commit_msgs {
 419         ($node: expr, $node_id: expr) => {
 420                 {
 421                         use $crate::util::events::MessageSendEvent;
 422                         let events = $node.node.get_and_clear_pending_msg_events();
 423                         assert_eq!(events.len(), 2);
 424                         (match events[0] {
 425                                 MessageSendEvent::SendRevokeAndACK { ref node_id, ref msg } => {
 426                                         assert_eq!(*node_id, $node_id);
 427                                         (*msg).clone()
 428                                 },
 429                                 _ => panic!("Unexpected event"),
 430                         }, match events[1] {
 431                                 MessageSendEvent::UpdateHTLCs { ref node_id, ref updates } => {
 432                                         assert_eq!(*node_id, $node_id);
 433                                         assert!(updates.update_add_htlcs.is_empty());
 434                                         assert!(updates.update_fulfill_htlcs.is_empty());
 435                                         assert!(updates.update_fail_htlcs.is_empty());
 436                                         assert!(updates.update_fail_malformed_htlcs.is_empty());
 437                                         assert!(updates.update_fee.is_none());
 438                                         updates.commitment_signed.clone()
 439                                 },
 440                                 _ => panic!("Unexpected event"),
 441                         })
 442                 }
 443         }
 444 }
 445
 446 /// Get an specific event message from the pending events queue.
 447 #[macro_export]
 448 macro_rules! get_event_msg {
 449         ($node: expr, $event_type: path, $node_id: expr) => {
 450                 {
 451                         let events = $node.node.get_and_clear_pending_msg_events();
 452                         assert_eq!(events.len(), 1);
 453                         match events[0] {
 454                                 $event_type { ref node_id, ref msg } => {
 455                                         assert_eq!(*node_id, $node_id);
 456                                         (*msg).clone()
 457                                 },
 458                                 _ => panic!("Unexpected event"),
 459                         }
 460                 }
 461         }
 462 }
 463
 464 /// Get an error message from the pending events queue.
 465 #[macro_export]
 466 macro_rules! get_err_msg {
 467         ($node: expr, $node_id: expr) => {
 468                 {
 469                         let events = $node.node.get_and_clear_pending_msg_events();
 470                         assert_eq!(events.len(), 1);
 471                         match events[0] {
 472                                 $crate::util::events::MessageSendEvent::HandleError {
 473                                         action: $crate::ln::msgs::ErrorAction::SendErrorMessage { ref msg }, ref node_id
 474                                 } => {
 475                                         assert_eq!(*node_id, $node_id);
 476                                         (*msg).clone()
 477                                 },
 478                                 _ => panic!("Unexpected event"),
 479                         }
 480                 }
 481         }
 482 }
 483
 484 /// Get a specific event from the pending events queue.
 485 #[macro_export]
 486 macro_rules! get_event {
 487         ($node: expr, $event_type: path) => {
 488                 {
 489                         let mut events = $node.node.get_and_clear_pending_events();
 490                         assert_eq!(events.len(), 1);
 491                         let ev = events.pop().unwrap();
 492                         match ev {
 493                                 $event_type { .. } => {
 494                                         ev
 495                                 },
 496                                 _ => panic!("Unexpected event"),
 497                         }
 498                 }
 499         }
 500 }
 501
 502 #[macro_export]
 503 /// Gets an UpdateHTLCs MessageSendEvent
 504 macro_rules! get_htlc_update_msgs {
 505         ($node: expr, $node_id: expr) => {
 506                 {
 507                         let events = $node.node.get_and_clear_pending_msg_events();
 508                         assert_eq!(events.len(), 1);
 509                         match events[0] {
 510                                 $crate::util::events::MessageSendEvent::UpdateHTLCs { ref node_id, ref updates } => {
 511                                         assert_eq!(*node_id, $node_id);
 512                                         (*updates).clone()
 513                                 },
 514                                 _ => panic!("Unexpected event"),
 515                         }
 516                 }
 517         }
 518 }
 519
 520 #[cfg(test)]
 521 macro_rules! get_channel_ref {
 522         ($node: expr, $lock: ident, $channel_id: expr) => {
 523                 {
 524                         $lock = $node.node.channel_state.lock().unwrap();
 525                         $lock.by_id.get_mut(&$channel_id).unwrap()
 526                 }
 527         }
 528 }
 529
 530 #[cfg(test)]
 531 macro_rules! get_feerate {
 532         ($node: expr, $channel_id: expr) => {
 533                 {
 534                         let mut lock;
 535                         let chan = get_channel_ref!($node, lock, $channel_id);
 536                         chan.get_feerate()
 537                 }
 538         }
 539 }
 540
 541 #[cfg(test)]
 542 macro_rules! get_opt_anchors {
 543         ($node: expr, $channel_id: expr) => {
 544                 {
 545                         let mut lock;
 546                         let chan = get_channel_ref!($node, lock, $channel_id);
 547                         chan.opt_anchors()
 548                 }
 549         }
 550 }
 551
 552 /// Returns a channel monitor given a channel id, making some naive assumptions
 553 #[macro_export]
 554 macro_rules! get_monitor {
 555         ($node: expr, $channel_id: expr) => {
 556                 {
 557                         use bitcoin::hashes::Hash;
 558                         let mut monitor = None;
 559                         // Assume funding vout is either 0 or 1 blindly
 560                         for index in 0..2 {
 561                                 if let Ok(mon) = $node.chain_monitor.chain_monitor.get_monitor(
 562                                         $crate::chain::transaction::OutPoint {
 563                                                 txid: bitcoin::Txid::from_slice(&$channel_id[..]).unwrap(), index
 564                                         })
 565                                 {
 566                                         monitor = Some(mon);
 567                                         break;
 568                                 }
 569                         }
 570                         monitor.unwrap()
 571                 }
 572         }
 573 }
 574
 575 /// Returns any local commitment transactions for the channel.
 576 #[macro_export]
 577 macro_rules! get_local_commitment_txn {
 578         ($node: expr, $channel_id: expr) => {
 579                 {
 580                         $crate::get_monitor!($node, $channel_id).unsafe_get_latest_holder_commitment_txn(&$node.logger)
 581                 }
 582         }
 583 }
 584
 585 /// Check the error from attempting a payment.
 586 #[macro_export]
 587 macro_rules! unwrap_send_err {
 588         ($res: expr, $all_failed: expr, $type: pat, $check: expr) => {
 589                 match &$res {
 590                         &Err(PaymentSendFailure::AllFailedResendSafe(ref fails)) if $all_failed => {
 591                                 assert_eq!(fails.len(), 1);
 592                                 match fails[0] {
 593                                         $type => { $check },
 594                                         _ => panic!(),
 595                                 }
 596                         },
 597                         &Err(PaymentSendFailure::PartialFailure { ref results, .. }) if !$all_failed => {
 598                                 assert_eq!(results.len(), 1);
 599                                 match results[0] {
 600                                         Err($type) => { $check },
 601                                         _ => panic!(),
 602                                 }
 603                         },
 604                         _ => panic!(),
 605                 }
 606         }
 607 }
 608
 609 /// Check whether N channel monitor(s) have been added.
 610 #[macro_export]
 611 macro_rules! check_added_monitors {
 612         ($node: expr, $count: expr) => {
 613                 {
 614                         let mut added_monitors = $node.chain_monitor.added_monitors.lock().unwrap();
 615                         assert_eq!(added_monitors.len(), $count);
 616                         added_monitors.clear();
 617                 }
 618         }
 619 }
 620
 621 pub fn create_funding_transaction<'a, 'b, 'c>(node: &Node<'a, 'b, 'c>, expected_counterparty_node_id: &PublicKey, expected_chan_value: u64, expected_user_chan_id: u64) -> ([u8; 32], Transaction, OutPoint) {
 622         let chan_id = *node.network_chan_count.borrow();
 623
 624         let events = node.node.get_and_clear_pending_events();
 625         assert_eq!(events.len(), 1);
 626         match events[0] {
 627                 Event::FundingGenerationReady { ref temporary_channel_id, ref counterparty_node_id, ref channel_value_satoshis, ref output_script, user_channel_id } => {
 628                         assert_eq!(counterparty_node_id, expected_counterparty_node_id);
 629                         assert_eq!(*channel_value_satoshis, expected_chan_value);
 630                         assert_eq!(user_channel_id, expected_user_chan_id);
 631
 632                         let tx = Transaction { version: chan_id as i32, lock_time: PackedLockTime::ZERO, input: Vec::new(), output: vec![TxOut {
 633                                 value: *channel_value_satoshis, script_pubkey: output_script.clone(),
 634                         }]};
 635                         let funding_outpoint = OutPoint { txid: tx.txid(), index: 0 };
 636                         (*temporary_channel_id, tx, funding_outpoint)
 637                 },
 638                 _ => panic!("Unexpected event"),
 639         }
 640 }
 641 pub fn sign_funding_transaction<'a, 'b, 'c>(node_a: &Node<'a, 'b, 'c>, node_b: &Node<'a, 'b, 'c>, channel_value: u64, expected_temporary_channel_id: [u8; 32]) -> Transaction {
 642         let (temporary_channel_id, tx, funding_output) = create_funding_transaction(node_a, &node_b.node.get_our_node_id(), channel_value, 42);
 643         assert_eq!(temporary_channel_id, expected_temporary_channel_id);
 644
 645         assert!(node_a.node.funding_transaction_generated(&temporary_channel_id, &node_b.node.get_our_node_id(), tx.clone()).is_ok());
 646         check_added_monitors!(node_a, 0);
 647
 648         let funding_created_msg = get_event_msg!(node_a, MessageSendEvent::SendFundingCreated, node_b.node.get_our_node_id());
 649         assert_eq!(funding_created_msg.temporary_channel_id, expected_temporary_channel_id);
 650         node_b.node.handle_funding_created(&node_a.node.get_our_node_id(), &funding_created_msg);
 651         {
 652                 let mut added_monitors = node_b.chain_monitor.added_monitors.lock().unwrap();
 653                 assert_eq!(added_monitors.len(), 1);
 654                 assert_eq!(added_monitors[0].0, funding_output);
 655                 added_monitors.clear();
 656         }
 657
 658         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()));
 659         {
 660                 let mut added_monitors = node_a.chain_monitor.added_monitors.lock().unwrap();
 661                 assert_eq!(added_monitors.len(), 1);
 662                 assert_eq!(added_monitors[0].0, funding_output);
 663                 added_monitors.clear();
 664         }
 665
 666         let events_4 = node_a.node.get_and_clear_pending_events();
 667         assert_eq!(events_4.len(), 0);
 668
 669         assert_eq!(node_a.tx_broadcaster.txn_broadcasted.lock().unwrap().len(), 1);
 670         assert_eq!(node_a.tx_broadcaster.txn_broadcasted.lock().unwrap()[0], tx);
 671         node_a.tx_broadcaster.txn_broadcasted.lock().unwrap().clear();
 672
 673         // Ensure that funding_transaction_generated is idempotent.
 674         assert!(node_a.node.funding_transaction_generated(&temporary_channel_id, &node_b.node.get_our_node_id(), tx.clone()).is_err());
 675         assert!(node_a.node.get_and_clear_pending_msg_events().is_empty());
 676         check_added_monitors!(node_a, 0);
 677
 678         tx
 679 }
 680
 681 // Receiver must have been initialized with manually_accept_inbound_channels set to true.
 682 pub fn open_zero_conf_channel<'a, 'b, 'c, 'd>(initiator: &'a Node<'b, 'c, 'd>, receiver: &'a Node<'b, 'c, 'd>, initiator_config: Option<UserConfig>) -> (bitcoin::Transaction, [u8; 32]) {
 683         let initiator_channels = initiator.node.list_usable_channels().len();
 684         let receiver_channels = receiver.node.list_usable_channels().len();
 685
 686         initiator.node.create_channel(receiver.node.get_our_node_id(), 100_000, 10_001, 42, initiator_config).unwrap();
 687         let open_channel = get_event_msg!(initiator, MessageSendEvent::SendOpenChannel, receiver.node.get_our_node_id());
 688
 689         receiver.node.handle_open_channel(&initiator.node.get_our_node_id(), channelmanager::provided_init_features(), &open_channel);
 690         let events = receiver.node.get_and_clear_pending_events();
 691         assert_eq!(events.len(), 1);
 692         match events[0] {
 693                 Event::OpenChannelRequest { temporary_channel_id, .. } => {
 694                         receiver.node.accept_inbound_channel_from_trusted_peer_0conf(&temporary_channel_id, &initiator.node.get_our_node_id(), 0).unwrap();
 695                 },
 696                 _ => panic!("Unexpected event"),
 697         };
 698
 699         let accept_channel = get_event_msg!(receiver, MessageSendEvent::SendAcceptChannel, initiator.node.get_our_node_id());
 700         assert_eq!(accept_channel.minimum_depth, 0);
 701         initiator.node.handle_accept_channel(&receiver.node.get_our_node_id(), channelmanager::provided_init_features(), &accept_channel);
 702
 703         let (temporary_channel_id, tx, _) = create_funding_transaction(&initiator, &receiver.node.get_our_node_id(), 100_000, 42);
 704         initiator.node.funding_transaction_generated(&temporary_channel_id, &receiver.node.get_our_node_id(), tx.clone()).unwrap();
 705         let funding_created = get_event_msg!(initiator, MessageSendEvent::SendFundingCreated, receiver.node.get_our_node_id());
 706
 707         receiver.node.handle_funding_created(&initiator.node.get_our_node_id(), &funding_created);
 708         check_added_monitors!(receiver, 1);
 709         let bs_signed_locked = receiver.node.get_and_clear_pending_msg_events();
 710         assert_eq!(bs_signed_locked.len(), 2);
 711         let as_channel_ready;
 712         match &bs_signed_locked[0] {
 713                 MessageSendEvent::SendFundingSigned { node_id, msg } => {
 714                         assert_eq!(*node_id, initiator.node.get_our_node_id());
 715                         initiator.node.handle_funding_signed(&receiver.node.get_our_node_id(), &msg);
 716                         check_added_monitors!(initiator, 1);
 717
 718                         assert_eq!(initiator.tx_broadcaster.txn_broadcasted.lock().unwrap().len(), 1);
 719                         assert_eq!(initiator.tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0)[0], tx);
 720
 721                         as_channel_ready = get_event_msg!(initiator, MessageSendEvent::SendChannelReady, receiver.node.get_our_node_id());
 722                 }
 723                 _ => panic!("Unexpected event"),
 724         }
 725         match &bs_signed_locked[1] {
 726                 MessageSendEvent::SendChannelReady { node_id, msg } => {
 727                         assert_eq!(*node_id, initiator.node.get_our_node_id());
 728                         initiator.node.handle_channel_ready(&receiver.node.get_our_node_id(), &msg);
 729                 }
 730                 _ => panic!("Unexpected event"),
 731         }
 732
 733         receiver.node.handle_channel_ready(&initiator.node.get_our_node_id(), &as_channel_ready);
 734
 735         let as_channel_update = get_event_msg!(initiator, MessageSendEvent::SendChannelUpdate, receiver.node.get_our_node_id());
 736         let bs_channel_update = get_event_msg!(receiver, MessageSendEvent::SendChannelUpdate, initiator.node.get_our_node_id());
 737
 738         initiator.node.handle_channel_update(&receiver.node.get_our_node_id(), &bs_channel_update);
 739         receiver.node.handle_channel_update(&initiator.node.get_our_node_id(), &as_channel_update);
 740
 741         assert_eq!(initiator.node.list_usable_channels().len(), initiator_channels + 1);
 742         assert_eq!(receiver.node.list_usable_channels().len(), receiver_channels + 1);
 743
 744         expect_channel_ready_event(&initiator, &receiver.node.get_our_node_id());
 745         expect_channel_ready_event(&receiver, &initiator.node.get_our_node_id());
 746
 747         (tx, as_channel_ready.channel_id)
 748 }
 749
 750 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 {
 751         let create_chan_id = node_a.node.create_channel(node_b.node.get_our_node_id(), channel_value, push_msat, 42, None).unwrap();
 752         let open_channel_msg = get_event_msg!(node_a, MessageSendEvent::SendOpenChannel, node_b.node.get_our_node_id());
 753         assert_eq!(open_channel_msg.temporary_channel_id, create_chan_id);
 754         node_b.node.handle_open_channel(&node_a.node.get_our_node_id(), a_flags, &open_channel_msg);
 755         let accept_channel_msg = get_event_msg!(node_b, MessageSendEvent::SendAcceptChannel, node_a.node.get_our_node_id());
 756         assert_eq!(accept_channel_msg.temporary_channel_id, create_chan_id);
 757         node_a.node.handle_accept_channel(&node_b.node.get_our_node_id(), b_flags, &accept_channel_msg);
 758
 759         sign_funding_transaction(node_a, node_b, channel_value, create_chan_id)
 760 }
 761
 762 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, conf_height: u32) {
 763         confirm_transaction_at(node_conf, tx, conf_height);
 764         connect_blocks(node_conf, CHAN_CONFIRM_DEPTH - 1);
 765         node_recv.node.handle_channel_ready(&node_conf.node.get_our_node_id(), &get_event_msg!(node_conf, MessageSendEvent::SendChannelReady, node_recv.node.get_our_node_id()));
 766 }
 767
 768 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::ChannelReady, msgs::AnnouncementSignatures), [u8; 32]) {
 769         let channel_id;
 770         let events_6 = node_conf.node.get_and_clear_pending_msg_events();
 771         assert_eq!(events_6.len(), 3);
 772         let announcement_sigs_idx = if let MessageSendEvent::SendChannelUpdate { ref node_id, msg: _ } = events_6[1] {
 773                 assert_eq!(*node_id, node_recv.node.get_our_node_id());
 774                 2
 775         } else if let MessageSendEvent::SendChannelUpdate { ref node_id, msg: _ } = events_6[2] {
 776                 assert_eq!(*node_id, node_recv.node.get_our_node_id());
 777                 1
 778         } else { panic!("Unexpected event: {:?}", events_6[1]); };
 779         ((match events_6[0] {
 780                 MessageSendEvent::SendChannelReady { ref node_id, ref msg } => {
 781                         channel_id = msg.channel_id.clone();
 782                         assert_eq!(*node_id, node_recv.node.get_our_node_id());
 783                         msg.clone()
 784                 },
 785                 _ => panic!("Unexpected event"),
 786         }, match events_6[announcement_sigs_idx] {
 787                 MessageSendEvent::SendAnnouncementSignatures { ref node_id, ref msg } => {
 788                         assert_eq!(*node_id, node_recv.node.get_our_node_id());
 789                         msg.clone()
 790                 },
 791                 _ => panic!("Unexpected event"),
 792         }), channel_id)
 793 }
 794
 795 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::ChannelReady, msgs::AnnouncementSignatures), [u8; 32]) {
 796         let conf_height = core::cmp::max(node_a.best_block_info().1 + 1, node_b.best_block_info().1 + 1);
 797         create_chan_between_nodes_with_value_confirm_first(node_a, node_b, tx, conf_height);
 798         confirm_transaction_at(node_a, tx, conf_height);
 799         connect_blocks(node_a, CHAN_CONFIRM_DEPTH - 1);
 800         expect_channel_ready_event(&node_a, &node_b.node.get_our_node_id());
 801         create_chan_between_nodes_with_value_confirm_second(node_b, node_a)
 802 }
 803
 804 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::ChannelReady, msgs::AnnouncementSignatures), [u8; 32], Transaction) {
 805         let tx = create_chan_between_nodes_with_value_init(node_a, node_b, channel_value, push_msat, a_flags, b_flags);
 806         let (msgs, chan_id) = create_chan_between_nodes_with_value_confirm(node_a, node_b, &tx);
 807         (msgs, chan_id, tx)
 808 }
 809
 810 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::ChannelReady, msgs::AnnouncementSignatures)) -> (msgs::ChannelAnnouncement, msgs::ChannelUpdate, msgs::ChannelUpdate) {
 811         node_b.node.handle_channel_ready(&node_a.node.get_our_node_id(), &as_funding_msgs.0);
 812         let bs_announcement_sigs = get_event_msg!(node_b, MessageSendEvent::SendAnnouncementSignatures, node_a.node.get_our_node_id());
 813         node_b.node.handle_announcement_signatures(&node_a.node.get_our_node_id(), &as_funding_msgs.1);
 814
 815         let events_7 = node_b.node.get_and_clear_pending_msg_events();
 816         assert_eq!(events_7.len(), 1);
 817         let (announcement, bs_update) = match events_7[0] {
 818                 MessageSendEvent::BroadcastChannelAnnouncement { ref msg, ref update_msg } => {
 819                         (msg, update_msg)
 820                 },
 821                 _ => panic!("Unexpected event"),
 822         };
 823
 824         node_a.node.handle_announcement_signatures(&node_b.node.get_our_node_id(), &bs_announcement_sigs);
 825         let events_8 = node_a.node.get_and_clear_pending_msg_events();
 826         assert_eq!(events_8.len(), 1);
 827         let as_update = match events_8[0] {
 828                 MessageSendEvent::BroadcastChannelAnnouncement { ref msg, ref update_msg } => {
 829                         assert!(*announcement == *msg);
 830                         assert_eq!(update_msg.contents.short_channel_id, announcement.contents.short_channel_id);
 831                         assert_eq!(update_msg.contents.short_channel_id, bs_update.contents.short_channel_id);
 832                         update_msg
 833                 },
 834                 _ => panic!("Unexpected event"),
 835         };
 836
 837         *node_a.network_chan_count.borrow_mut() += 1;
 838
 839         expect_channel_ready_event(&node_b, &node_a.node.get_our_node_id());
 840         ((*announcement).clone(), (*as_update).clone(), (*bs_update).clone())
 841 }
 842
 843 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) {
 844         create_announced_chan_between_nodes_with_value(nodes, a, b, 100000, 10001, a_flags, b_flags)
 845 }
 846
 847 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) {
 848         let chan_announcement = create_chan_between_nodes_with_value(&nodes[a], &nodes[b], channel_value, push_msat, a_flags, b_flags);
 849         update_nodes_with_chan_announce(nodes, a, b, &chan_announcement.0, &chan_announcement.1, &chan_announcement.2);
 850         (chan_announcement.1, chan_announcement.2, chan_announcement.3, chan_announcement.4)
 851 }
 852
 853 pub fn create_unannounced_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::ChannelReady, Transaction) {
 854         let mut no_announce_cfg = test_default_channel_config();
 855         no_announce_cfg.channel_handshake_config.announced_channel = false;
 856         nodes[a].node.create_channel(nodes[b].node.get_our_node_id(), channel_value, push_msat, 42, Some(no_announce_cfg)).unwrap();
 857         let open_channel = get_event_msg!(nodes[a], MessageSendEvent::SendOpenChannel, nodes[b].node.get_our_node_id());
 858         nodes[b].node.handle_open_channel(&nodes[a].node.get_our_node_id(), a_flags, &open_channel);
 859         let accept_channel = get_event_msg!(nodes[b], MessageSendEvent::SendAcceptChannel, nodes[a].node.get_our_node_id());
 860         nodes[a].node.handle_accept_channel(&nodes[b].node.get_our_node_id(), b_flags, &accept_channel);
 861
 862         let (temporary_channel_id, tx, _) = create_funding_transaction(&nodes[a], &nodes[b].node.get_our_node_id(), channel_value, 42);
 863         nodes[a].node.funding_transaction_generated(&temporary_channel_id, &nodes[b].node.get_our_node_id(), tx.clone()).unwrap();
 864         nodes[b].node.handle_funding_created(&nodes[a].node.get_our_node_id(), &get_event_msg!(nodes[a], MessageSendEvent::SendFundingCreated, nodes[b].node.get_our_node_id()));
 865         check_added_monitors!(nodes[b], 1);
 866
 867         let cs_funding_signed = get_event_msg!(nodes[b], MessageSendEvent::SendFundingSigned, nodes[a].node.get_our_node_id());
 868         nodes[a].node.handle_funding_signed(&nodes[b].node.get_our_node_id(), &cs_funding_signed);
 869         check_added_monitors!(nodes[a], 1);
 870
 871         let conf_height = core::cmp::max(nodes[a].best_block_info().1 + 1, nodes[b].best_block_info().1 + 1);
 872         confirm_transaction_at(&nodes[a], &tx, conf_height);
 873         connect_blocks(&nodes[a], CHAN_CONFIRM_DEPTH - 1);
 874         confirm_transaction_at(&nodes[b], &tx, conf_height);
 875         connect_blocks(&nodes[b], CHAN_CONFIRM_DEPTH - 1);
 876         let as_channel_ready = get_event_msg!(nodes[a], MessageSendEvent::SendChannelReady, nodes[b].node.get_our_node_id());
 877         nodes[a].node.handle_channel_ready(&nodes[b].node.get_our_node_id(), &get_event_msg!(nodes[b], MessageSendEvent::SendChannelReady, nodes[a].node.get_our_node_id()));
 878         expect_channel_ready_event(&nodes[a], &nodes[b].node.get_our_node_id());
 879         let as_update = get_event_msg!(nodes[a], MessageSendEvent::SendChannelUpdate, nodes[b].node.get_our_node_id());
 880         nodes[b].node.handle_channel_ready(&nodes[a].node.get_our_node_id(), &as_channel_ready);
 881         expect_channel_ready_event(&nodes[b], &nodes[a].node.get_our_node_id());
 882         let bs_update = get_event_msg!(nodes[b], MessageSendEvent::SendChannelUpdate, nodes[a].node.get_our_node_id());
 883
 884         nodes[a].node.handle_channel_update(&nodes[b].node.get_our_node_id(), &bs_update);
 885         nodes[b].node.handle_channel_update(&nodes[a].node.get_our_node_id(), &as_update);
 886
 887         let mut found_a = false;
 888         for chan in nodes[a].node.list_usable_channels() {
 889                 if chan.channel_id == as_channel_ready.channel_id {
 890                         assert!(!found_a);
 891                         found_a = true;
 892                         assert!(!chan.is_public);
 893                 }
 894         }
 895         assert!(found_a);
 896
 897         let mut found_b = false;
 898         for chan in nodes[b].node.list_usable_channels() {
 899                 if chan.channel_id == as_channel_ready.channel_id {
 900                         assert!(!found_b);
 901                         found_b = true;
 902                         assert!(!chan.is_public);
 903                 }
 904         }
 905         assert!(found_b);
 906
 907         (as_channel_ready, tx)
 908 }
 909
 910 pub fn update_nodes_with_chan_announce<'a, 'b, 'c, 'd>(nodes: &'a Vec<Node<'b, 'c, 'd>>, a: usize, b: usize, ann: &msgs::ChannelAnnouncement, upd_1: &msgs::ChannelUpdate, upd_2: &msgs::ChannelUpdate) {
 911         for node in nodes {
 912                 assert!(node.gossip_sync.handle_channel_announcement(ann).unwrap());
 913                 node.gossip_sync.handle_channel_update(upd_1).unwrap();
 914                 node.gossip_sync.handle_channel_update(upd_2).unwrap();
 915
 916                 // Note that channel_updates are also delivered to ChannelManagers to ensure we have
 917                 // forwarding info for local channels even if its not accepted in the network graph.
 918                 node.node.handle_channel_update(&nodes[a].node.get_our_node_id(), &upd_1);
 919                 node.node.handle_channel_update(&nodes[b].node.get_our_node_id(), &upd_2);
 920         }
 921 }
 922
 923 #[macro_export]
 924 macro_rules! check_spends {
 925         ($tx: expr, $($spends_txn: expr),*) => {
 926                 {
 927                         $(
 928                         for outp in $spends_txn.output.iter() {
 929                                 assert!(outp.value >= outp.script_pubkey.dust_value().to_sat(), "Input tx output didn't meet dust limit");
 930                         }
 931                         )*
 932                         for outp in $tx.output.iter() {
 933                                 assert!(outp.value >= outp.script_pubkey.dust_value().to_sat(), "Spending tx output didn't meet dust limit");
 934                         }
 935                         let get_output = |out_point: &bitcoin::blockdata::transaction::OutPoint| {
 936                                 $(
 937                                         if out_point.txid == $spends_txn.txid() {
 938                                                 return $spends_txn.output.get(out_point.vout as usize).cloned()
 939                                         }
 940                                 )*
 941                                 None
 942                         };
 943                         let mut total_value_in = 0;
 944                         for input in $tx.input.iter() {
 945                                 total_value_in += get_output(&input.previous_output).unwrap().value;
 946                         }
 947                         let mut total_value_out = 0;
 948                         for output in $tx.output.iter() {
 949                                 total_value_out += output.value;
 950                         }
 951                         let min_fee = ($tx.weight() as u64 + 3) / 4; // One sat per vbyte (ie per weight/4, rounded up)
 952                         // Input amount - output amount = fee, so check that out + min_fee is smaller than input
 953                         assert!(total_value_out + min_fee <= total_value_in);
 954                         $tx.verify(get_output).unwrap();
 955                 }
 956         }
 957 }
 958
 959 macro_rules! get_closing_signed_broadcast {
 960         ($node: expr, $dest_pubkey: expr) => {
 961                 {
 962                         let events = $node.get_and_clear_pending_msg_events();
 963                         assert!(events.len() == 1 || events.len() == 2);
 964                         (match events[events.len() - 1] {
 965                                 MessageSendEvent::BroadcastChannelUpdate { ref msg } => {
 966                                         assert_eq!(msg.contents.flags & 2, 2);
 967                                         msg.clone()
 968                                 },
 969                                 _ => panic!("Unexpected event"),
 970                         }, if events.len() == 2 {
 971                                 match events[0] {
 972                                         MessageSendEvent::SendClosingSigned { ref node_id, ref msg } => {
 973                                                 assert_eq!(*node_id, $dest_pubkey);
 974                                                 Some(msg.clone())
 975                                         },
 976                                         _ => panic!("Unexpected event"),
 977                                 }
 978                         } else { None })
 979                 }
 980         }
 981 }
 982
 983 #[cfg(test)]
 984 macro_rules! check_warn_msg {
 985         ($node: expr, $recipient_node_id: expr, $chan_id: expr) => {{
 986                 let msg_events = $node.node.get_and_clear_pending_msg_events();
 987                 assert_eq!(msg_events.len(), 1);
 988                 match msg_events[0] {
 989                         MessageSendEvent::HandleError { action: ErrorAction::SendWarningMessage { ref msg, log_level: _ }, node_id } => {
 990                                 assert_eq!(node_id, $recipient_node_id);
 991                                 assert_eq!(msg.channel_id, $chan_id);
 992                                 msg.data.clone()
 993                         },
 994                         _ => panic!("Unexpected event"),
 995                 }
 996         }}
 997 }
 998
 999 /// Check that a channel's closing channel update has been broadcasted, and optionally
1000 /// check whether an error message event has occurred.
1001 #[macro_export]
1002 macro_rules! check_closed_broadcast {
1003         ($node: expr, $with_error_msg: expr) => {{
1004                 use $crate::util::events::MessageSendEvent;
1005                 use $crate::ln::msgs::ErrorAction;
1006
1007                 let msg_events = $node.node.get_and_clear_pending_msg_events();
1008                 assert_eq!(msg_events.len(), if $with_error_msg { 2 } else { 1 });
1009                 match msg_events[0] {
1010                         MessageSendEvent::BroadcastChannelUpdate { ref msg } => {
1011                                 assert_eq!(msg.contents.flags & 2, 2);
1012                         },
1013                         _ => panic!("Unexpected event"),
1014                 }
1015                 if $with_error_msg {
1016                         match msg_events[1] {
1017                                 MessageSendEvent::HandleError { action: ErrorAction::SendErrorMessage { ref msg }, node_id: _ } => {
1018                                         // TODO: Check node_id
1019                                         Some(msg.clone())
1020                                 },
1021                                 _ => panic!("Unexpected event"),
1022                         }
1023                 } else { None }
1024         }}
1025 }
1026
1027 /// Check that a channel's closing channel events has been issued
1028 #[macro_export]
1029 macro_rules! check_closed_event {
1030         ($node: expr, $events: expr, $reason: expr) => {
1031                 check_closed_event!($node, $events, $reason, false);
1032         };
1033         ($node: expr, $events: expr, $reason: expr, $is_check_discard_funding: expr) => {{
1034                 use $crate::util::events::Event;
1035
1036                 let events = $node.node.get_and_clear_pending_events();
1037                 assert_eq!(events.len(), $events);
1038                 let expected_reason = $reason;
1039                 let mut issues_discard_funding = false;
1040                 for event in events {
1041                         match event {
1042                                 Event::ChannelClosed { ref reason, .. } => {
1043                                         assert_eq!(*reason, expected_reason);
1044                                 },
1045                                 Event::DiscardFunding { .. } => {
1046                                         issues_discard_funding = true;
1047                                 }
1048                                 _ => panic!("Unexpected event"),
1049                         }
1050                 }
1051                 assert_eq!($is_check_discard_funding, issues_discard_funding);
1052         }}
1053 }
1054
1055 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) {
1056         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) };
1057         let (node_b, broadcaster_b, struct_b) = if close_inbound_first { (&outbound_node.node, &outbound_node.tx_broadcaster, outbound_node) } else { (&inbound_node.node, &inbound_node.tx_broadcaster, inbound_node) };
1058         let (tx_a, tx_b);
1059
1060         node_a.close_channel(channel_id, &node_b.get_our_node_id()).unwrap();
1061         node_b.handle_shutdown(&node_a.get_our_node_id(), &channelmanager::provided_init_features(), &get_event_msg!(struct_a, MessageSendEvent::SendShutdown, node_b.get_our_node_id()));
1062
1063         let events_1 = node_b.get_and_clear_pending_msg_events();
1064         assert!(events_1.len() >= 1);
1065         let shutdown_b = match events_1[0] {
1066                 MessageSendEvent::SendShutdown { ref node_id, ref msg } => {
1067                         assert_eq!(node_id, &node_a.get_our_node_id());
1068                         msg.clone()
1069                 },
1070                 _ => panic!("Unexpected event"),
1071         };
1072
1073         let closing_signed_b = if !close_inbound_first {
1074                 assert_eq!(events_1.len(), 1);
1075                 None
1076         } else {
1077                 Some(match events_1[1] {
1078                         MessageSendEvent::SendClosingSigned { ref node_id, ref msg } => {
1079                                 assert_eq!(node_id, &node_a.get_our_node_id());
1080                                 msg.clone()
1081                         },
1082                         _ => panic!("Unexpected event"),
1083                 })
1084         };
1085
1086         node_a.handle_shutdown(&node_b.get_our_node_id(), &channelmanager::provided_init_features(), &shutdown_b);
1087         let (as_update, bs_update) = if close_inbound_first {
1088                 assert!(node_a.get_and_clear_pending_msg_events().is_empty());
1089                 node_a.handle_closing_signed(&node_b.get_our_node_id(), &closing_signed_b.unwrap());
1090
1091                 node_b.handle_closing_signed(&node_a.get_our_node_id(), &get_event_msg!(struct_a, MessageSendEvent::SendClosingSigned, node_b.get_our_node_id()));
1092                 assert_eq!(broadcaster_b.txn_broadcasted.lock().unwrap().len(), 1);
1093                 tx_b = broadcaster_b.txn_broadcasted.lock().unwrap().remove(0);
1094                 let (bs_update, closing_signed_b) = get_closing_signed_broadcast!(node_b, node_a.get_our_node_id());
1095
1096                 node_a.handle_closing_signed(&node_b.get_our_node_id(), &closing_signed_b.unwrap());
1097                 let (as_update, none_a) = get_closing_signed_broadcast!(node_a, node_b.get_our_node_id());
1098                 assert!(none_a.is_none());
1099                 assert_eq!(broadcaster_a.txn_broadcasted.lock().unwrap().len(), 1);
1100                 tx_a = broadcaster_a.txn_broadcasted.lock().unwrap().remove(0);
1101                 (as_update, bs_update)
1102         } else {
1103                 let closing_signed_a = get_event_msg!(struct_a, MessageSendEvent::SendClosingSigned, node_b.get_our_node_id());
1104
1105                 node_b.handle_closing_signed(&node_a.get_our_node_id(), &closing_signed_a);
1106                 node_a.handle_closing_signed(&node_b.get_our_node_id(), &get_event_msg!(struct_b, MessageSendEvent::SendClosingSigned, node_a.get_our_node_id()));
1107
1108                 assert_eq!(broadcaster_a.txn_broadcasted.lock().unwrap().len(), 1);
1109                 tx_a = broadcaster_a.txn_broadcasted.lock().unwrap().remove(0);
1110                 let (as_update, closing_signed_a) = get_closing_signed_broadcast!(node_a, node_b.get_our_node_id());
1111
1112                 node_b.handle_closing_signed(&node_a.get_our_node_id(), &closing_signed_a.unwrap());
1113                 let (bs_update, none_b) = get_closing_signed_broadcast!(node_b, node_a.get_our_node_id());
1114                 assert!(none_b.is_none());
1115                 assert_eq!(broadcaster_b.txn_broadcasted.lock().unwrap().len(), 1);
1116                 tx_b = broadcaster_b.txn_broadcasted.lock().unwrap().remove(0);
1117                 (as_update, bs_update)
1118         };
1119         assert_eq!(tx_a, tx_b);
1120         check_spends!(tx_a, funding_tx);
1121
1122         (as_update, bs_update, tx_a)
1123 }
1124
1125 pub struct SendEvent {
1126         pub node_id: PublicKey,
1127         pub msgs: Vec<msgs::UpdateAddHTLC>,
1128         pub commitment_msg: msgs::CommitmentSigned,
1129 }
1130 impl SendEvent {
1131         pub fn from_commitment_update(node_id: PublicKey, updates: msgs::CommitmentUpdate) -> SendEvent {
1132                 assert!(updates.update_fulfill_htlcs.is_empty());
1133                 assert!(updates.update_fail_htlcs.is_empty());
1134                 assert!(updates.update_fail_malformed_htlcs.is_empty());
1135                 assert!(updates.update_fee.is_none());
1136                 SendEvent { node_id, msgs: updates.update_add_htlcs, commitment_msg: updates.commitment_signed }
1137         }
1138
1139         pub fn from_event(event: MessageSendEvent) -> SendEvent {
1140                 match event {
1141                         MessageSendEvent::UpdateHTLCs { node_id, updates } => SendEvent::from_commitment_update(node_id, updates),
1142                         _ => panic!("Unexpected event type!"),
1143                 }
1144         }
1145
1146         pub fn from_node<'a, 'b, 'c>(node: &Node<'a, 'b, 'c>) -> SendEvent {
1147                 let mut events = node.node.get_and_clear_pending_msg_events();
1148                 assert_eq!(events.len(), 1);
1149                 SendEvent::from_event(events.pop().unwrap())
1150         }
1151 }
1152
1153 #[macro_export]
1154 /// Performs the "commitment signed dance" - the series of message exchanges which occur after a
1155 /// commitment update.
1156 macro_rules! commitment_signed_dance {
1157         ($node_a: expr, $node_b: expr, $commitment_signed: expr, $fail_backwards: expr, true /* skip last step */) => {
1158                 {
1159                         check_added_monitors!($node_a, 0);
1160                         assert!($node_a.node.get_and_clear_pending_msg_events().is_empty());
1161                         $node_a.node.handle_commitment_signed(&$node_b.node.get_our_node_id(), &$commitment_signed);
1162                         check_added_monitors!($node_a, 1);
1163                         commitment_signed_dance!($node_a, $node_b, (), $fail_backwards, true, false);
1164                 }
1165         };
1166         ($node_a: expr, $node_b: expr, (), $fail_backwards: expr, true /* skip last step */, true /* return extra message */, true /* return last RAA */) => {
1167                 {
1168                         let (as_revoke_and_ack, as_commitment_signed) = get_revoke_commit_msgs!($node_a, $node_b.node.get_our_node_id());
1169                         check_added_monitors!($node_b, 0);
1170                         assert!($node_b.node.get_and_clear_pending_msg_events().is_empty());
1171                         $node_b.node.handle_revoke_and_ack(&$node_a.node.get_our_node_id(), &as_revoke_and_ack);
1172                         assert!($node_b.node.get_and_clear_pending_msg_events().is_empty());
1173                         check_added_monitors!($node_b, 1);
1174                         $node_b.node.handle_commitment_signed(&$node_a.node.get_our_node_id(), &as_commitment_signed);
1175                         let (bs_revoke_and_ack, extra_msg_option) = {
1176                                 let events = $node_b.node.get_and_clear_pending_msg_events();
1177                                 assert!(events.len() <= 2);
1178                                 (match events[0] {
1179                                         MessageSendEvent::SendRevokeAndACK { ref node_id, ref msg } => {
1180                                                 assert_eq!(*node_id, $node_a.node.get_our_node_id());
1181                                                 (*msg).clone()
1182                                         },
1183                                         _ => panic!("Unexpected event"),
1184                                 }, events.get(1).map(|e| e.clone()))
1185                         };
1186                         check_added_monitors!($node_b, 1);
1187                         if $fail_backwards {
1188                                 assert!($node_a.node.get_and_clear_pending_events().is_empty());
1189                                 assert!($node_a.node.get_and_clear_pending_msg_events().is_empty());
1190                         }
1191                         (extra_msg_option, bs_revoke_and_ack)
1192                 }
1193         };
1194         ($node_a: expr, $node_b: expr, $commitment_signed: expr, $fail_backwards: expr, true /* skip last step */, false /* return extra message */, true /* return last RAA */) => {
1195                 {
1196                         check_added_monitors!($node_a, 0);
1197                         assert!($node_a.node.get_and_clear_pending_msg_events().is_empty());
1198                         $node_a.node.handle_commitment_signed(&$node_b.node.get_our_node_id(), &$commitment_signed);
1199                         check_added_monitors!($node_a, 1);
1200                         let (extra_msg_option, bs_revoke_and_ack) = commitment_signed_dance!($node_a, $node_b, (), $fail_backwards, true, true, true);
1201                         assert!(extra_msg_option.is_none());
1202                         bs_revoke_and_ack
1203                 }
1204         };
1205         ($node_a: expr, $node_b: expr, (), $fail_backwards: expr, true /* skip last step */, true /* return extra message */) => {
1206                 {
1207                         let (extra_msg_option, bs_revoke_and_ack) = commitment_signed_dance!($node_a, $node_b, (), $fail_backwards, true, true, true);
1208                         $node_a.node.handle_revoke_and_ack(&$node_b.node.get_our_node_id(), &bs_revoke_and_ack);
1209                         check_added_monitors!($node_a, 1);
1210                         extra_msg_option
1211                 }
1212         };
1213         ($node_a: expr, $node_b: expr, (), $fail_backwards: expr, true /* skip last step */, false /* no extra message */) => {
1214                 {
1215                         assert!(commitment_signed_dance!($node_a, $node_b, (), $fail_backwards, true, true).is_none());
1216                 }
1217         };
1218         ($node_a: expr, $node_b: expr, $commitment_signed: expr, $fail_backwards: expr) => {
1219                 {
1220                         commitment_signed_dance!($node_a, $node_b, $commitment_signed, $fail_backwards, true);
1221                         if $fail_backwards {
1222                                 expect_pending_htlcs_forwardable_and_htlc_handling_failed!($node_a, vec![$crate::util::events::HTLCDestination::NextHopChannel{ node_id: Some($node_b.node.get_our_node_id()), channel_id: $commitment_signed.channel_id }]);
1223                                 check_added_monitors!($node_a, 1);
1224
1225                                 let channel_state = $node_a.node.channel_state.lock().unwrap();
1226                                 assert_eq!(channel_state.pending_msg_events.len(), 1);
1227                                 if let MessageSendEvent::UpdateHTLCs { ref node_id, .. } = channel_state.pending_msg_events[0] {
1228                                         assert_ne!(*node_id, $node_b.node.get_our_node_id());
1229                                 } else { panic!("Unexpected event"); }
1230                         } else {
1231                                 assert!($node_a.node.get_and_clear_pending_msg_events().is_empty());
1232                         }
1233                 }
1234         }
1235 }
1236
1237 /// Get a payment preimage and hash.
1238 #[macro_export]
1239 macro_rules! get_payment_preimage_hash {
1240         ($dest_node: expr) => {
1241                 {
1242                         get_payment_preimage_hash!($dest_node, None)
1243                 }
1244         };
1245         ($dest_node: expr, $min_value_msat: expr) => {
1246                 {
1247                         use bitcoin::hashes::Hash as _;
1248                         let mut payment_count = $dest_node.network_payment_count.borrow_mut();
1249                         let payment_preimage = $crate::ln::PaymentPreimage([*payment_count; 32]);
1250                         *payment_count += 1;
1251                         let payment_hash = $crate::ln::PaymentHash(
1252                                 bitcoin::hashes::sha256::Hash::hash(&payment_preimage.0[..]).into_inner());
1253                         let payment_secret = $dest_node.node.create_inbound_payment_for_hash(payment_hash, $min_value_msat, 7200).unwrap();
1254                         (payment_preimage, payment_hash, payment_secret)
1255                 }
1256         }
1257 }
1258
1259 #[macro_export]
1260 macro_rules! get_route {
1261         ($send_node: expr, $payment_params: expr, $recv_value: expr, $cltv: expr) => {{
1262                 use $crate::chain::keysinterface::KeysInterface;
1263                 let scorer = $crate::util::test_utils::TestScorer::with_penalty(0);
1264                 let keys_manager = $crate::util::test_utils::TestKeysInterface::new(&[0u8; 32], bitcoin::network::constants::Network::Testnet);
1265                 let random_seed_bytes = keys_manager.get_secure_random_bytes();
1266                 $crate::routing::router::get_route(
1267                         &$send_node.node.get_our_node_id(), &$payment_params, &$send_node.network_graph.read_only(),
1268                         Some(&$send_node.node.list_usable_channels().iter().collect::<Vec<_>>()),
1269                         $recv_value, $cltv, $send_node.logger, &scorer, &random_seed_bytes
1270                 )
1271         }}
1272 }
1273
1274 #[cfg(test)]
1275 #[macro_export]
1276 macro_rules! get_route_and_payment_hash {
1277         ($send_node: expr, $recv_node: expr, $recv_value: expr) => {{
1278                 let payment_params = $crate::routing::router::PaymentParameters::from_node_id($recv_node.node.get_our_node_id())
1279                         .with_features($crate::ln::channelmanager::provided_invoice_features());
1280                 $crate::get_route_and_payment_hash!($send_node, $recv_node, payment_params, $recv_value, TEST_FINAL_CLTV)
1281         }};
1282         ($send_node: expr, $recv_node: expr, $payment_params: expr, $recv_value: expr, $cltv: expr) => {{
1283                 let (payment_preimage, payment_hash, payment_secret) = $crate::get_payment_preimage_hash!($recv_node, Some($recv_value));
1284                 let route = $crate::get_route!($send_node, $payment_params, $recv_value, $cltv);
1285                 (route.unwrap(), payment_hash, payment_preimage, payment_secret)
1286         }}
1287 }
1288
1289 #[macro_export]
1290 macro_rules! expect_pending_htlcs_forwardable_conditions {
1291         ($node: expr, $expected_failures: expr) => {{
1292                 let expected_failures = $expected_failures;
1293                 let events = $node.node.get_and_clear_pending_events();
1294                 match events[0] {
1295                         $crate::util::events::Event::PendingHTLCsForwardable { .. } => { },
1296                         _ => panic!("Unexpected event"),
1297                 };
1298
1299                 let count = expected_failures.len() + 1;
1300                 assert_eq!(events.len(), count);
1301
1302                 if expected_failures.len() > 0 {
1303                         expect_htlc_handling_failed_destinations!(events, expected_failures)
1304                 }
1305         }}
1306 }
1307
1308 #[macro_export]
1309 macro_rules! expect_htlc_handling_failed_destinations {
1310         ($events: expr, $expected_failures: expr) => {{
1311                 for event in $events {
1312                         match event {
1313                                 $crate::util::events::Event::PendingHTLCsForwardable { .. } => { },
1314                                 $crate::util::events::Event::HTLCHandlingFailed { ref failed_next_destination, .. } => {
1315                                         assert!($expected_failures.contains(&failed_next_destination))
1316                                 },
1317                                 _ => panic!("Unexpected destination"),
1318                         }
1319                 }
1320         }}
1321 }
1322
1323 #[macro_export]
1324 /// Clears (and ignores) a PendingHTLCsForwardable event
1325 macro_rules! expect_pending_htlcs_forwardable_ignore {
1326         ($node: expr) => {{
1327                 expect_pending_htlcs_forwardable_conditions!($node, vec![]);
1328         }};
1329 }
1330
1331 #[macro_export]
1332 /// Clears (and ignores) PendingHTLCsForwardable and HTLCHandlingFailed events
1333 macro_rules! expect_pending_htlcs_forwardable_and_htlc_handling_failed_ignore {
1334         ($node: expr, $expected_failures: expr) => {{
1335                 expect_pending_htlcs_forwardable_conditions!($node, $expected_failures);
1336         }};
1337 }
1338
1339 #[macro_export]
1340 /// Handles a PendingHTLCsForwardable event
1341 macro_rules! expect_pending_htlcs_forwardable {
1342         ($node: expr) => {{
1343                 expect_pending_htlcs_forwardable_ignore!($node);
1344                 $node.node.process_pending_htlc_forwards();
1345
1346                 // Ensure process_pending_htlc_forwards is idempotent.
1347                 $node.node.process_pending_htlc_forwards();
1348         }};
1349 }
1350
1351 #[macro_export]
1352 /// Handles a PendingHTLCsForwardable and HTLCHandlingFailed event
1353 macro_rules! expect_pending_htlcs_forwardable_and_htlc_handling_failed {
1354         ($node: expr, $expected_failures: expr) => {{
1355                 expect_pending_htlcs_forwardable_and_htlc_handling_failed_ignore!($node, $expected_failures);
1356                 $node.node.process_pending_htlc_forwards();
1357
1358                 // Ensure process_pending_htlc_forwards is idempotent.
1359                 $node.node.process_pending_htlc_forwards();
1360         }}
1361 }
1362
1363 #[cfg(test)]
1364 macro_rules! expect_pending_htlcs_forwardable_from_events {
1365         ($node: expr, $events: expr, $ignore: expr) => {{
1366                 assert_eq!($events.len(), 1);
1367                 match $events[0] {
1368                         Event::PendingHTLCsForwardable { .. } => { },
1369                         _ => panic!("Unexpected event"),
1370                 };
1371                 if $ignore {
1372                         $node.node.process_pending_htlc_forwards();
1373
1374                         // Ensure process_pending_htlc_forwards is idempotent.
1375                         $node.node.process_pending_htlc_forwards();
1376                 }
1377         }}
1378 }
1379
1380 #[macro_export]
1381 #[cfg(any(test, feature = "_bench_unstable", feature = "_test_utils"))]
1382 macro_rules! expect_payment_received {
1383         ($node: expr, $expected_payment_hash: expr, $expected_payment_secret: expr, $expected_recv_value: expr) => {
1384                 expect_payment_received!($node, $expected_payment_hash, $expected_payment_secret, $expected_recv_value, None)
1385         };
1386         ($node: expr, $expected_payment_hash: expr, $expected_payment_secret: expr, $expected_recv_value: expr, $expected_payment_preimage: expr) => {
1387                 let events = $node.node.get_and_clear_pending_events();
1388                 assert_eq!(events.len(), 1);
1389                 match events[0] {
1390                         $crate::util::events::Event::PaymentReceived { ref payment_hash, ref purpose, amount_msat } => {
1391                                 assert_eq!($expected_payment_hash, *payment_hash);
1392                                 assert_eq!($expected_recv_value, amount_msat);
1393                                 match purpose {
1394                                         $crate::util::events::PaymentPurpose::InvoicePayment { payment_preimage, payment_secret, .. } => {
1395                                                 assert_eq!(&$expected_payment_preimage, payment_preimage);
1396                                                 assert_eq!($expected_payment_secret, *payment_secret);
1397                                         },
1398                                         _ => {},
1399                                 }
1400                         },
1401                         _ => panic!("Unexpected event"),
1402                 }
1403         }
1404 }
1405
1406 #[macro_export]
1407 #[cfg(any(test, feature = "_bench_unstable", feature = "_test_utils"))]
1408 macro_rules! expect_payment_claimed {
1409         ($node: expr, $expected_payment_hash: expr, $expected_recv_value: expr) => {
1410                 let events = $node.node.get_and_clear_pending_events();
1411                 assert_eq!(events.len(), 1);
1412                 match events[0] {
1413                         $crate::util::events::Event::PaymentClaimed { ref payment_hash, amount_msat, .. } => {
1414                                 assert_eq!($expected_payment_hash, *payment_hash);
1415                                 assert_eq!($expected_recv_value, amount_msat);
1416                         },
1417                         _ => panic!("Unexpected event"),
1418                 }
1419         }
1420 }
1421
1422 #[cfg(test)]
1423 #[macro_export]
1424 macro_rules! expect_payment_sent_without_paths {
1425         ($node: expr, $expected_payment_preimage: expr) => {
1426                 expect_payment_sent!($node, $expected_payment_preimage, None::<u64>, false);
1427         };
1428         ($node: expr, $expected_payment_preimage: expr, $expected_fee_msat_opt: expr) => {
1429                 expect_payment_sent!($node, $expected_payment_preimage, $expected_fee_msat_opt, false);
1430         }
1431 }
1432
1433 #[macro_export]
1434 macro_rules! expect_payment_sent {
1435         ($node: expr, $expected_payment_preimage: expr) => {
1436                 $crate::expect_payment_sent!($node, $expected_payment_preimage, None::<u64>, true);
1437         };
1438         ($node: expr, $expected_payment_preimage: expr, $expected_fee_msat_opt: expr) => {
1439                 $crate::expect_payment_sent!($node, $expected_payment_preimage, $expected_fee_msat_opt, true);
1440         };
1441         ($node: expr, $expected_payment_preimage: expr, $expected_fee_msat_opt: expr, $expect_paths: expr) => { {
1442                 use bitcoin::hashes::Hash as _;
1443                 let events = $node.node.get_and_clear_pending_events();
1444                 let expected_payment_hash = $crate::ln::PaymentHash(
1445                         bitcoin::hashes::sha256::Hash::hash(&$expected_payment_preimage.0).into_inner());
1446                 if $expect_paths {
1447                         assert!(events.len() > 1);
1448                 } else {
1449                         assert_eq!(events.len(), 1);
1450                 }
1451                 let expected_payment_id = match events[0] {
1452                         $crate::util::events::Event::PaymentSent { ref payment_id, ref payment_preimage, ref payment_hash, ref fee_paid_msat } => {
1453                                 assert_eq!($expected_payment_preimage, *payment_preimage);
1454                                 assert_eq!(expected_payment_hash, *payment_hash);
1455                                 assert!(fee_paid_msat.is_some());
1456                                 if $expected_fee_msat_opt.is_some() {
1457                                         assert_eq!(*fee_paid_msat, $expected_fee_msat_opt);
1458                                 }
1459                                 payment_id.unwrap()
1460                         },
1461                         _ => panic!("Unexpected event"),
1462                 };
1463                 if $expect_paths {
1464                         for i in 1..events.len() {
1465                                 match events[i] {
1466                                         $crate::util::events::Event::PaymentPathSuccessful { payment_id, payment_hash, .. } => {
1467                                                 assert_eq!(payment_id, expected_payment_id);
1468                                                 assert_eq!(payment_hash, Some(expected_payment_hash));
1469                                         },
1470                                         _ => panic!("Unexpected event"),
1471                                 }
1472                         }
1473                 }
1474         } }
1475 }
1476
1477 #[cfg(test)]
1478 #[macro_export]
1479 macro_rules! expect_payment_path_successful {
1480         ($node: expr) => {
1481                 let events = $node.node.get_and_clear_pending_events();
1482                 assert_eq!(events.len(), 1);
1483                 match events[0] {
1484                         $crate::util::events::Event::PaymentPathSuccessful { .. } => {},
1485                         _ => panic!("Unexpected event"),
1486                 }
1487         }
1488 }
1489
1490 macro_rules! expect_payment_forwarded {
1491         ($node: expr, $prev_node: expr, $next_node: expr, $expected_fee: expr, $upstream_force_closed: expr, $downstream_force_closed: expr) => {
1492                 let events = $node.node.get_and_clear_pending_events();
1493                 assert_eq!(events.len(), 1);
1494                 match events[0] {
1495                         Event::PaymentForwarded { fee_earned_msat, prev_channel_id, claim_from_onchain_tx, next_channel_id } => {
1496                                 assert_eq!(fee_earned_msat, $expected_fee);
1497                                 if fee_earned_msat.is_some() {
1498                                         // Is the event prev_channel_id in one of the channels between the two nodes?
1499                                         assert!($node.node.list_channels().iter().any(|x| x.counterparty.node_id == $prev_node.node.get_our_node_id() && x.channel_id == prev_channel_id.unwrap()));
1500                                 }
1501                                 // We check for force closures since a force closed channel is removed from the
1502                                 // node's channel list
1503                                 if !$downstream_force_closed {
1504                                         assert!($node.node.list_channels().iter().any(|x| x.counterparty.node_id == $next_node.node.get_our_node_id() && x.channel_id == next_channel_id.unwrap()));
1505                                 }
1506                                 assert_eq!(claim_from_onchain_tx, $upstream_force_closed);
1507                         },
1508                         _ => panic!("Unexpected event"),
1509                 }
1510         }
1511 }
1512
1513 #[cfg(any(test, feature = "_bench_unstable", feature = "_test_utils"))]
1514 pub fn expect_channel_ready_event<'a, 'b, 'c, 'd>(node: &'a Node<'b, 'c, 'd>, expected_counterparty_node_id: &PublicKey) {
1515         let events = node.node.get_and_clear_pending_events();
1516         assert_eq!(events.len(), 1);
1517         match events[0] {
1518                 crate::util::events::Event::ChannelReady{ ref counterparty_node_id, .. } => {
1519                         assert_eq!(*expected_counterparty_node_id, *counterparty_node_id);
1520                 },
1521                 _ => panic!("Unexpected event"),
1522         }
1523 }
1524
1525
1526 pub struct PaymentFailedConditions<'a> {
1527         pub(crate) expected_htlc_error_data: Option<(u16, &'a [u8])>,
1528         pub(crate) expected_blamed_scid: Option<u64>,
1529         pub(crate) expected_blamed_chan_closed: Option<bool>,
1530         pub(crate) expected_mpp_parts_remain: bool,
1531 }
1532
1533 impl<'a> PaymentFailedConditions<'a> {
1534         pub fn new() -> Self {
1535                 Self {
1536                         expected_htlc_error_data: None,
1537                         expected_blamed_scid: None,
1538                         expected_blamed_chan_closed: None,
1539                         expected_mpp_parts_remain: false,
1540                 }
1541         }
1542         pub fn mpp_parts_remain(mut self) -> Self {
1543                 self.expected_mpp_parts_remain = true;
1544                 self
1545         }
1546         pub fn blamed_scid(mut self, scid: u64) -> Self {
1547                 self.expected_blamed_scid = Some(scid);
1548                 self
1549         }
1550         pub fn blamed_chan_closed(mut self, closed: bool) -> Self {
1551                 self.expected_blamed_chan_closed = Some(closed);
1552                 self
1553         }
1554         pub fn expected_htlc_error_data(mut self, code: u16, data: &'a [u8]) -> Self {
1555                 self.expected_htlc_error_data = Some((code, data));
1556                 self
1557         }
1558 }
1559
1560 #[cfg(test)]
1561 macro_rules! expect_payment_failed_with_update {
1562         ($node: expr, $expected_payment_hash: expr, $payment_failed_permanently: expr, $scid: expr, $chan_closed: expr) => {
1563                 $crate::ln::functional_test_utils::expect_payment_failed_conditions(
1564                         &$node, $expected_payment_hash, $payment_failed_permanently,
1565                         $crate::ln::functional_test_utils::PaymentFailedConditions::new()
1566                                 .blamed_scid($scid).blamed_chan_closed($chan_closed));
1567         }
1568 }
1569
1570 #[cfg(test)]
1571 macro_rules! expect_payment_failed {
1572         ($node: expr, $expected_payment_hash: expr, $payment_failed_permanently: expr $(, $expected_error_code: expr, $expected_error_data: expr)*) => {
1573                 #[allow(unused_mut)]
1574                 let mut conditions = $crate::ln::functional_test_utils::PaymentFailedConditions::new();
1575                 $(
1576                         conditions = conditions.expected_htlc_error_data($expected_error_code, &$expected_error_data);
1577                 )*
1578                 $crate::ln::functional_test_utils::expect_payment_failed_conditions(&$node, $expected_payment_hash, $payment_failed_permanently, conditions);
1579         };
1580 }
1581
1582 pub fn expect_payment_failed_conditions_event<'a, 'b, 'c, 'd, 'e>(
1583         node: &'a Node<'b, 'c, 'd>, payment_failed_event: Event, expected_payment_hash: PaymentHash,
1584         expected_payment_failed_permanently: bool, conditions: PaymentFailedConditions<'e>
1585 ) {
1586         let expected_payment_id = match payment_failed_event {
1587                 Event::PaymentPathFailed { payment_hash, payment_failed_permanently, path, retry, payment_id, network_update, short_channel_id,
1588                         #[cfg(test)]
1589                         error_code,
1590                         #[cfg(test)]
1591                         error_data, .. } => {
1592                         assert_eq!(payment_hash, expected_payment_hash, "unexpected payment_hash");
1593                         assert_eq!(payment_failed_permanently, expected_payment_failed_permanently, "unexpected payment_failed_permanently value");
1594                         assert!(retry.is_some(), "expected retry.is_some()");
1595                         assert_eq!(retry.as_ref().unwrap().final_value_msat, path.last().unwrap().fee_msat, "Retry amount should match last hop in path");
1596                         assert_eq!(retry.as_ref().unwrap().payment_params.payee_pubkey, path.last().unwrap().pubkey, "Retry payee node_id should match last hop in path");
1597                         if let Some(scid) = short_channel_id {
1598                                 assert!(retry.as_ref().unwrap().payment_params.previously_failed_channels.contains(&scid));
1599                         }
1600
1601                         #[cfg(test)]
1602                         {
1603                                 assert!(error_code.is_some(), "expected error_code.is_some() = true");
1604                                 assert!(error_data.is_some(), "expected error_data.is_some() = true");
1605                                 if let Some((code, data)) = conditions.expected_htlc_error_data {
1606                                         assert_eq!(error_code.unwrap(), code, "unexpected error code");
1607                                         assert_eq!(&error_data.as_ref().unwrap()[..], data, "unexpected error data");
1608                                 }
1609                         }
1610
1611                         if let Some(chan_closed) = conditions.expected_blamed_chan_closed {
1612                                 match network_update {
1613                                         Some(NetworkUpdate::ChannelUpdateMessage { ref msg }) if !chan_closed => {
1614                                                 if let Some(scid) = conditions.expected_blamed_scid {
1615                                                         assert_eq!(msg.contents.short_channel_id, scid);
1616                                                 }
1617                                                 const CHAN_DISABLED_FLAG: u8 = 2;
1618                                                 assert_eq!(msg.contents.flags & CHAN_DISABLED_FLAG, 0);
1619                                         },
1620                                         Some(NetworkUpdate::ChannelFailure { short_channel_id, is_permanent }) if chan_closed => {
1621                                                 if let Some(scid) = conditions.expected_blamed_scid {
1622                                                         assert_eq!(short_channel_id, scid);
1623                                                 }
1624                                                 assert!(is_permanent);
1625                                         },
1626                                         Some(_) => panic!("Unexpected update type"),
1627                                         None => panic!("Expected update"),
1628                                 }
1629                         }
1630
1631                         payment_id.unwrap()
1632                 },
1633                 _ => panic!("Unexpected event"),
1634         };
1635         if !conditions.expected_mpp_parts_remain {
1636                 node.node.abandon_payment(expected_payment_id);
1637                 let events = node.node.get_and_clear_pending_events();
1638                 assert_eq!(events.len(), 1);
1639                 match events[0] {
1640                         Event::PaymentFailed { ref payment_hash, ref payment_id } => {
1641                                 assert_eq!(*payment_hash, expected_payment_hash, "unexpected second payment_hash");
1642                                 assert_eq!(*payment_id, expected_payment_id);
1643                         }
1644                         _ => panic!("Unexpected second event"),
1645                 }
1646         }
1647 }
1648
1649 pub fn expect_payment_failed_conditions<'a, 'b, 'c, 'd, 'e>(
1650         node: &'a Node<'b, 'c, 'd>, expected_payment_hash: PaymentHash, expected_payment_failed_permanently: bool,
1651         conditions: PaymentFailedConditions<'e>
1652 ) {
1653         let mut events = node.node.get_and_clear_pending_events();
1654         assert_eq!(events.len(), 1);
1655         expect_payment_failed_conditions_event(node, events.pop().unwrap(), expected_payment_hash, expected_payment_failed_permanently, conditions);
1656 }
1657
1658 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: PaymentSecret) -> PaymentId {
1659         let payment_id = PaymentId(origin_node.keys_manager.backing.get_secure_random_bytes());
1660         origin_node.node.send_payment(&route, our_payment_hash, &Some(our_payment_secret), payment_id).unwrap();
1661         check_added_monitors!(origin_node, expected_paths.len());
1662         pass_along_route(origin_node, expected_paths, recv_value, our_payment_hash, our_payment_secret);
1663         payment_id
1664 }
1665
1666 pub fn do_pass_along_path<'a, 'b, 'c>(origin_node: &Node<'a, 'b, 'c>, expected_path: &[&Node<'a, 'b, 'c>], recv_value: u64, our_payment_hash: PaymentHash, our_payment_secret: Option<PaymentSecret>, ev: MessageSendEvent, payment_received_expected: bool, clear_recipient_events: bool, expected_preimage: Option<PaymentPreimage>) {
1667         let mut payment_event = SendEvent::from_event(ev);
1668         let mut prev_node = origin_node;
1669
1670         for (idx, &node) in expected_path.iter().enumerate() {
1671                 assert_eq!(node.node.get_our_node_id(), payment_event.node_id);
1672
1673                 node.node.handle_update_add_htlc(&prev_node.node.get_our_node_id(), &payment_event.msgs[0]);
1674                 check_added_monitors!(node, 0);
1675                 commitment_signed_dance!(node, prev_node, payment_event.commitment_msg, false);
1676
1677                 expect_pending_htlcs_forwardable!(node);
1678
1679                 if idx == expected_path.len() - 1 && clear_recipient_events {
1680                         let events_2 = node.node.get_and_clear_pending_events();
1681                         if payment_received_expected {
1682                                 assert_eq!(events_2.len(), 1);
1683                                 match events_2[0] {
1684                                         Event::PaymentReceived { ref payment_hash, ref purpose, amount_msat } => {
1685                                                 assert_eq!(our_payment_hash, *payment_hash);
1686                                                 match &purpose {
1687                                                         PaymentPurpose::InvoicePayment { payment_preimage, payment_secret, .. } => {
1688                                                                 assert_eq!(expected_preimage, *payment_preimage);
1689                                                                 assert_eq!(our_payment_secret.unwrap(), *payment_secret);
1690                                                         },
1691                                                         PaymentPurpose::SpontaneousPayment(payment_preimage) => {
1692                                                                 assert_eq!(expected_preimage.unwrap(), *payment_preimage);
1693                                                                 assert!(our_payment_secret.is_none());
1694                                                         },
1695                                                 }
1696                                                 assert_eq!(amount_msat, recv_value);
1697                                         },
1698                                         _ => panic!("Unexpected event"),
1699                                 }
1700                         } else {
1701                                 assert!(events_2.is_empty());
1702                         }
1703                 } else if idx != expected_path.len() - 1 {
1704                         let mut events_2 = node.node.get_and_clear_pending_msg_events();
1705                         assert_eq!(events_2.len(), 1);
1706                         check_added_monitors!(node, 1);
1707                         payment_event = SendEvent::from_event(events_2.remove(0));
1708                         assert_eq!(payment_event.msgs.len(), 1);
1709                 }
1710
1711                 prev_node = node;
1712         }
1713 }
1714
1715 pub fn pass_along_path<'a, 'b, 'c>(origin_node: &Node<'a, 'b, 'c>, expected_path: &[&Node<'a, 'b, 'c>], recv_value: u64, our_payment_hash: PaymentHash, our_payment_secret: Option<PaymentSecret>, ev: MessageSendEvent, payment_received_expected: bool, expected_preimage: Option<PaymentPreimage>) {
1716         do_pass_along_path(origin_node, expected_path, recv_value, our_payment_hash, our_payment_secret, ev, payment_received_expected, true, expected_preimage);
1717 }
1718
1719 pub fn pass_along_route<'a, 'b, 'c>(origin_node: &Node<'a, 'b, 'c>, expected_route: &[&[&Node<'a, 'b, 'c>]], recv_value: u64, our_payment_hash: PaymentHash, our_payment_secret: PaymentSecret) {
1720         let mut events = origin_node.node.get_and_clear_pending_msg_events();
1721         assert_eq!(events.len(), expected_route.len());
1722         for (path_idx, (ev, expected_path)) in events.drain(..).zip(expected_route.iter()).enumerate() {
1723                 // Once we've gotten through all the HTLCs, the last one should result in a
1724                 // PaymentReceived (but each previous one should not!), .
1725                 let expect_payment = path_idx == expected_route.len() - 1;
1726                 pass_along_path(origin_node, expected_path, recv_value, our_payment_hash.clone(), Some(our_payment_secret), ev, expect_payment, None);
1727         }
1728 }
1729
1730 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, PaymentSecret, PaymentId) {
1731         let (our_payment_preimage, our_payment_hash, our_payment_secret) = get_payment_preimage_hash!(expected_route.last().unwrap());
1732         let payment_id = send_along_route_with_secret(origin_node, route, &[expected_route], recv_value, our_payment_hash, our_payment_secret);
1733         (our_payment_preimage, our_payment_hash, our_payment_secret, payment_id)
1734 }
1735
1736 pub fn do_claim_payment_along_route<'a, 'b, 'c>(origin_node: &Node<'a, 'b, 'c>, expected_paths: &[&[&Node<'a, 'b, 'c>]], skip_last: bool, our_payment_preimage: PaymentPreimage) -> u64 {
1737         for path in expected_paths.iter() {
1738                 assert_eq!(path.last().unwrap().node.get_our_node_id(), expected_paths[0].last().unwrap().node.get_our_node_id());
1739         }
1740         expected_paths[0].last().unwrap().node.claim_funds(our_payment_preimage);
1741
1742         let claim_event = expected_paths[0].last().unwrap().node.get_and_clear_pending_events();
1743         assert_eq!(claim_event.len(), 1);
1744         match claim_event[0] {
1745                 Event::PaymentClaimed { purpose: PaymentPurpose::SpontaneousPayment(preimage), .. }|
1746                 Event::PaymentClaimed { purpose: PaymentPurpose::InvoicePayment { payment_preimage: Some(preimage), ..}, .. } =>
1747                         assert_eq!(preimage, our_payment_preimage),
1748                 Event::PaymentClaimed { purpose: PaymentPurpose::InvoicePayment { .. }, payment_hash, .. } =>
1749                         assert_eq!(&payment_hash.0, &Sha256::hash(&our_payment_preimage.0)[..]),
1750                 _ => panic!(),
1751         }
1752
1753         check_added_monitors!(expected_paths[0].last().unwrap(), expected_paths.len());
1754
1755         let mut expected_total_fee_msat = 0;
1756
1757         macro_rules! msgs_from_ev {
1758                 ($ev: expr) => {
1759                         match $ev {
1760                                 &MessageSendEvent::UpdateHTLCs { ref node_id, updates: msgs::CommitmentUpdate { ref update_add_htlcs, ref update_fulfill_htlcs, ref update_fail_htlcs, ref update_fail_malformed_htlcs, ref update_fee, ref commitment_signed } } => {
1761                                         assert!(update_add_htlcs.is_empty());
1762                                         assert_eq!(update_fulfill_htlcs.len(), 1);
1763                                         assert!(update_fail_htlcs.is_empty());
1764                                         assert!(update_fail_malformed_htlcs.is_empty());
1765                                         assert!(update_fee.is_none());
1766                                         ((update_fulfill_htlcs[0].clone(), commitment_signed.clone()), node_id.clone())
1767                                 },
1768                                 _ => panic!("Unexpected event"),
1769                         }
1770                 }
1771         }
1772         let mut per_path_msgs: Vec<((msgs::UpdateFulfillHTLC, msgs::CommitmentSigned), PublicKey)> = Vec::with_capacity(expected_paths.len());
1773         let events = expected_paths[0].last().unwrap().node.get_and_clear_pending_msg_events();
1774         assert_eq!(events.len(), expected_paths.len());
1775         for ev in events.iter() {
1776                 per_path_msgs.push(msgs_from_ev!(ev));
1777         }
1778
1779         for (expected_route, (path_msgs, next_hop)) in expected_paths.iter().zip(per_path_msgs.drain(..)) {
1780                 let mut next_msgs = Some(path_msgs);
1781                 let mut expected_next_node = next_hop;
1782
1783                 macro_rules! last_update_fulfill_dance {
1784                         ($node: expr, $prev_node: expr) => {
1785                                 {
1786                                         $node.node.handle_update_fulfill_htlc(&$prev_node.node.get_our_node_id(), &next_msgs.as_ref().unwrap().0);
1787                                         check_added_monitors!($node, 0);
1788                                         assert!($node.node.get_and_clear_pending_msg_events().is_empty());
1789                                         commitment_signed_dance!($node, $prev_node, next_msgs.as_ref().unwrap().1, false);
1790                                 }
1791                         }
1792                 }
1793                 macro_rules! mid_update_fulfill_dance {
1794                         ($node: expr, $prev_node: expr, $next_node: expr, $new_msgs: expr) => {
1795                                 {
1796                                         $node.node.handle_update_fulfill_htlc(&$prev_node.node.get_our_node_id(), &next_msgs.as_ref().unwrap().0);
1797                                         let fee = {
1798                                                 let channel_state = $node.node.channel_state.lock().unwrap();
1799                                                 let channel = channel_state
1800                                                         .by_id.get(&next_msgs.as_ref().unwrap().0.channel_id).unwrap();
1801                                                 if let Some(prev_config) = channel.prev_config() {
1802                                                         prev_config.forwarding_fee_base_msat
1803                                                 } else {
1804                                                         channel.config().forwarding_fee_base_msat
1805                                                 }
1806                                         };
1807                                         expect_payment_forwarded!($node, $next_node, $prev_node, Some(fee as u64), false, false);
1808                                         expected_total_fee_msat += fee as u64;
1809                                         check_added_monitors!($node, 1);
1810                                         let new_next_msgs = if $new_msgs {
1811                                                 let events = $node.node.get_and_clear_pending_msg_events();
1812                                                 assert_eq!(events.len(), 1);
1813                                                 let (res, nexthop) = msgs_from_ev!(&events[0]);
1814                                                 expected_next_node = nexthop;
1815                                                 Some(res)
1816                                         } else {
1817                                                 assert!($node.node.get_and_clear_pending_msg_events().is_empty());
1818                                                 None
1819                                         };
1820                                         commitment_signed_dance!($node, $prev_node, next_msgs.as_ref().unwrap().1, false);
1821                                         next_msgs = new_next_msgs;
1822                                 }
1823                         }
1824                 }
1825
1826                 let mut prev_node = expected_route.last().unwrap();
1827                 for (idx, node) in expected_route.iter().rev().enumerate().skip(1) {
1828                         assert_eq!(expected_next_node, node.node.get_our_node_id());
1829                         let update_next_msgs = !skip_last || idx != expected_route.len() - 1;
1830                         if next_msgs.is_some() {
1831                                 // Since we are traversing in reverse, next_node is actually the previous node
1832                                 let next_node: &Node;
1833                                 if idx == expected_route.len() - 1 {
1834                                         next_node = origin_node;
1835                                 } else {
1836                                         next_node = expected_route[expected_route.len() - 1 - idx - 1];
1837                                 }
1838                                 mid_update_fulfill_dance!(node, prev_node, next_node, update_next_msgs);
1839                         } else {
1840                                 assert!(!update_next_msgs);
1841                                 assert!(node.node.get_and_clear_pending_msg_events().is_empty());
1842                         }
1843                         if !skip_last && idx == expected_route.len() - 1 {
1844                                 assert_eq!(expected_next_node, origin_node.node.get_our_node_id());
1845                         }
1846
1847                         prev_node = node;
1848                 }
1849
1850                 if !skip_last {
1851                         last_update_fulfill_dance!(origin_node, expected_route.first().unwrap());
1852                 }
1853         }
1854
1855         // Ensure that claim_funds is idempotent.
1856         expected_paths[0].last().unwrap().node.claim_funds(our_payment_preimage);
1857         assert!(expected_paths[0].last().unwrap().node.get_and_clear_pending_msg_events().is_empty());
1858         check_added_monitors!(expected_paths[0].last().unwrap(), 0);
1859
1860         expected_total_fee_msat
1861 }
1862 pub fn claim_payment_along_route<'a, 'b, 'c>(origin_node: &Node<'a, 'b, 'c>, expected_paths: &[&[&Node<'a, 'b, 'c>]], skip_last: bool, our_payment_preimage: PaymentPreimage) {
1863         let expected_total_fee_msat = do_claim_payment_along_route(origin_node, expected_paths, skip_last, our_payment_preimage);
1864         if !skip_last {
1865                 expect_payment_sent!(origin_node, our_payment_preimage, Some(expected_total_fee_msat));
1866         }
1867 }
1868
1869 pub fn claim_payment<'a, 'b, 'c>(origin_node: &Node<'a, 'b, 'c>, expected_route: &[&Node<'a, 'b, 'c>], our_payment_preimage: PaymentPreimage) {
1870         claim_payment_along_route(origin_node, &[expected_route], false, our_payment_preimage);
1871 }
1872
1873 pub const TEST_FINAL_CLTV: u32 = 70;
1874
1875 pub fn route_payment<'a, 'b, 'c>(origin_node: &Node<'a, 'b, 'c>, expected_route: &[&Node<'a, 'b, 'c>], recv_value: u64) -> (PaymentPreimage, PaymentHash, PaymentSecret) {
1876         let payment_params = PaymentParameters::from_node_id(expected_route.last().unwrap().node.get_our_node_id())
1877                 .with_features(channelmanager::provided_invoice_features());
1878         let route = get_route!(origin_node, payment_params, recv_value, TEST_FINAL_CLTV).unwrap();
1879         assert_eq!(route.paths.len(), 1);
1880         assert_eq!(route.paths[0].len(), expected_route.len());
1881         for (node, hop) in expected_route.iter().zip(route.paths[0].iter()) {
1882                 assert_eq!(hop.pubkey, node.node.get_our_node_id());
1883         }
1884
1885         let res = send_along_route(origin_node, route, expected_route, recv_value);
1886         (res.0, res.1, res.2)
1887 }
1888
1889 pub fn route_over_limit<'a, 'b, 'c>(origin_node: &Node<'a, 'b, 'c>, expected_route: &[&Node<'a, 'b, 'c>], recv_value: u64)  {
1890         let payment_params = PaymentParameters::from_node_id(expected_route.last().unwrap().node.get_our_node_id())
1891                 .with_features(channelmanager::provided_invoice_features());
1892         let network_graph = origin_node.network_graph.read_only();
1893         let scorer = test_utils::TestScorer::with_penalty(0);
1894         let seed = [0u8; 32];
1895         let keys_manager = test_utils::TestKeysInterface::new(&seed, Network::Testnet);
1896         let random_seed_bytes = keys_manager.get_secure_random_bytes();
1897         let route = get_route(
1898                 &origin_node.node.get_our_node_id(), &payment_params, &network_graph,
1899                 None, recv_value, TEST_FINAL_CLTV, origin_node.logger, &scorer, &random_seed_bytes).unwrap();
1900         assert_eq!(route.paths.len(), 1);
1901         assert_eq!(route.paths[0].len(), expected_route.len());
1902         for (node, hop) in expected_route.iter().zip(route.paths[0].iter()) {
1903                 assert_eq!(hop.pubkey, node.node.get_our_node_id());
1904         }
1905
1906         let (_, our_payment_hash, our_payment_preimage) = get_payment_preimage_hash!(expected_route.last().unwrap());
1907         unwrap_send_err!(origin_node.node.send_payment(&route, our_payment_hash, &Some(our_payment_preimage), PaymentId(our_payment_hash.0)), true, APIError::ChannelUnavailable { ref err },
1908                 assert!(err.contains("Cannot send value that would put us over the max HTLC value in flight our peer will accept")));
1909 }
1910
1911 pub fn send_payment<'a, 'b, 'c>(origin: &Node<'a, 'b, 'c>, expected_route: &[&Node<'a, 'b, 'c>], recv_value: u64)  {
1912         let our_payment_preimage = route_payment(&origin, expected_route, recv_value).0;
1913         claim_payment(&origin, expected_route, our_payment_preimage);
1914 }
1915
1916 pub fn fail_payment_along_route<'a, 'b, 'c>(origin_node: &Node<'a, 'b, 'c>, expected_paths: &[&[&Node<'a, 'b, 'c>]], skip_last: bool, our_payment_hash: PaymentHash) {
1917         for path in expected_paths.iter() {
1918                 assert_eq!(path.last().unwrap().node.get_our_node_id(), expected_paths[0].last().unwrap().node.get_our_node_id());
1919         }
1920         expected_paths[0].last().unwrap().node.fail_htlc_backwards(&our_payment_hash);
1921         let expected_destinations: Vec<HTLCDestination> = repeat(HTLCDestination::FailedPayment { payment_hash: our_payment_hash }).take(expected_paths.len()).collect();
1922         expect_pending_htlcs_forwardable_and_htlc_handling_failed!(expected_paths[0].last().unwrap(), expected_destinations);
1923
1924         pass_failed_payment_back(origin_node, expected_paths, skip_last, our_payment_hash);
1925 }
1926
1927 pub fn pass_failed_payment_back<'a, 'b, 'c>(origin_node: &Node<'a, 'b, 'c>, expected_paths_slice: &[&[&Node<'a, 'b, 'c>]], skip_last: bool, our_payment_hash: PaymentHash) {
1928         let expected_payment_id = pass_failed_payment_back_no_abandon(origin_node, expected_paths_slice, skip_last, our_payment_hash);
1929         if !skip_last {
1930                 origin_node.node.abandon_payment(expected_payment_id.unwrap());
1931                 let events = origin_node.node.get_and_clear_pending_events();
1932                 assert_eq!(events.len(), 1);
1933                 match events[0] {
1934                         Event::PaymentFailed { ref payment_hash, ref payment_id } => {
1935                                 assert_eq!(*payment_hash, our_payment_hash, "unexpected second payment_hash");
1936                                 assert_eq!(*payment_id, expected_payment_id.unwrap());
1937                         }
1938                         _ => panic!("Unexpected second event"),
1939                 }
1940         }
1941 }
1942
1943 pub fn pass_failed_payment_back_no_abandon<'a, 'b, 'c>(origin_node: &Node<'a, 'b, 'c>, expected_paths_slice: &[&[&Node<'a, 'b, 'c>]], skip_last: bool, our_payment_hash: PaymentHash) -> Option<PaymentId> {
1944         let mut expected_paths: Vec<_> = expected_paths_slice.iter().collect();
1945         check_added_monitors!(expected_paths[0].last().unwrap(), expected_paths.len());
1946
1947         let mut per_path_msgs: Vec<((msgs::UpdateFailHTLC, msgs::CommitmentSigned), PublicKey)> = Vec::with_capacity(expected_paths.len());
1948         let events = expected_paths[0].last().unwrap().node.get_and_clear_pending_msg_events();
1949         assert_eq!(events.len(), expected_paths.len());
1950         for ev in events.iter() {
1951                 let (update_fail, commitment_signed, node_id) = match ev {
1952                         &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 } } => {
1953                                 assert!(update_add_htlcs.is_empty());
1954                                 assert!(update_fulfill_htlcs.is_empty());
1955                                 assert_eq!(update_fail_htlcs.len(), 1);
1956                                 assert!(update_fail_malformed_htlcs.is_empty());
1957                                 assert!(update_fee.is_none());
1958                                 (update_fail_htlcs[0].clone(), commitment_signed.clone(), node_id.clone())
1959                         },
1960                         _ => panic!("Unexpected event"),
1961                 };
1962                 per_path_msgs.push(((update_fail, commitment_signed), node_id));
1963         }
1964         per_path_msgs.sort_unstable_by(|(_, node_id_a), (_, node_id_b)| node_id_a.cmp(node_id_b));
1965         expected_paths.sort_unstable_by(|path_a, path_b| path_a[path_a.len() - 2].node.get_our_node_id().cmp(&path_b[path_b.len() - 2].node.get_our_node_id()));
1966
1967         let mut expected_payment_id = None;
1968
1969         for (i, (expected_route, (path_msgs, next_hop))) in expected_paths.iter().zip(per_path_msgs.drain(..)).enumerate() {
1970                 let mut next_msgs = Some(path_msgs);
1971                 let mut expected_next_node = next_hop;
1972                 let mut prev_node = expected_route.last().unwrap();
1973
1974                 for (idx, node) in expected_route.iter().rev().enumerate().skip(1) {
1975                         assert_eq!(expected_next_node, node.node.get_our_node_id());
1976                         let update_next_node = !skip_last || idx != expected_route.len() - 1;
1977                         if next_msgs.is_some() {
1978                                 node.node.handle_update_fail_htlc(&prev_node.node.get_our_node_id(), &next_msgs.as_ref().unwrap().0);
1979                                 commitment_signed_dance!(node, prev_node, next_msgs.as_ref().unwrap().1, update_next_node);
1980                                 if !update_next_node {
1981                                         expect_pending_htlcs_forwardable_and_htlc_handling_failed!(node, vec![HTLCDestination::NextHopChannel { node_id: Some(prev_node.node.get_our_node_id()), channel_id: next_msgs.as_ref().unwrap().0.channel_id }]);
1982                                 }
1983                         }
1984                         let events = node.node.get_and_clear_pending_msg_events();
1985                         if update_next_node {
1986                                 assert_eq!(events.len(), 1);
1987                                 match events[0] {
1988                                         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 } } => {
1989                                                 assert!(update_add_htlcs.is_empty());
1990                                                 assert!(update_fulfill_htlcs.is_empty());
1991                                                 assert_eq!(update_fail_htlcs.len(), 1);
1992                                                 assert!(update_fail_malformed_htlcs.is_empty());
1993                                                 assert!(update_fee.is_none());
1994                                                 expected_next_node = node_id.clone();
1995                                                 next_msgs = Some((update_fail_htlcs[0].clone(), commitment_signed.clone()));
1996                                         },
1997                                         _ => panic!("Unexpected event"),
1998                                 }
1999                         } else {
2000                                 assert!(events.is_empty());
2001                         }
2002                         if !skip_last && idx == expected_route.len() - 1 {
2003                                 assert_eq!(expected_next_node, origin_node.node.get_our_node_id());
2004                         }
2005
2006                         prev_node = node;
2007                 }
2008
2009                 if !skip_last {
2010                         let prev_node = expected_route.first().unwrap();
2011                         origin_node.node.handle_update_fail_htlc(&prev_node.node.get_our_node_id(), &next_msgs.as_ref().unwrap().0);
2012                         check_added_monitors!(origin_node, 0);
2013                         assert!(origin_node.node.get_and_clear_pending_msg_events().is_empty());
2014                         commitment_signed_dance!(origin_node, prev_node, next_msgs.as_ref().unwrap().1, false);
2015                         let events = origin_node.node.get_and_clear_pending_events();
2016                         assert_eq!(events.len(), 1);
2017                         expected_payment_id = Some(match events[0] {
2018                                 Event::PaymentPathFailed { payment_hash, payment_failed_permanently, all_paths_failed, ref path, ref payment_id, .. } => {
2019                                         assert_eq!(payment_hash, our_payment_hash);
2020                                         assert!(payment_failed_permanently);
2021                                         assert_eq!(all_paths_failed, i == expected_paths.len() - 1);
2022                                         for (idx, hop) in expected_route.iter().enumerate() {
2023                                                 assert_eq!(hop.node.get_our_node_id(), path[idx].pubkey);
2024                                         }
2025                                         payment_id.unwrap()
2026                                 },
2027                                 _ => panic!("Unexpected event"),
2028                         });
2029                 }
2030         }
2031
2032         // Ensure that fail_htlc_backwards is idempotent.
2033         expected_paths[0].last().unwrap().node.fail_htlc_backwards(&our_payment_hash);
2034         assert!(expected_paths[0].last().unwrap().node.get_and_clear_pending_events().is_empty());
2035         assert!(expected_paths[0].last().unwrap().node.get_and_clear_pending_msg_events().is_empty());
2036         check_added_monitors!(expected_paths[0].last().unwrap(), 0);
2037
2038         expected_payment_id
2039 }
2040
2041 pub fn fail_payment<'a, 'b, 'c>(origin_node: &Node<'a, 'b, 'c>, expected_path: &[&Node<'a, 'b, 'c>], our_payment_hash: PaymentHash)  {
2042         fail_payment_along_route(origin_node, &[&expected_path[..]], false, our_payment_hash);
2043 }
2044
2045 pub fn create_chanmon_cfgs(node_count: usize) -> Vec<TestChanMonCfg> {
2046         let mut chan_mon_cfgs = Vec::new();
2047         for i in 0..node_count {
2048                 let tx_broadcaster = test_utils::TestBroadcaster {
2049                         txn_broadcasted: Mutex::new(Vec::new()),
2050                         blocks: Arc::new(Mutex::new(vec![(genesis_block(Network::Testnet), 0)])),
2051                 };
2052                 let fee_estimator = test_utils::TestFeeEstimator { sat_per_kw: Mutex::new(253) };
2053                 let chain_source = test_utils::TestChainSource::new(Network::Testnet);
2054                 let logger = test_utils::TestLogger::with_id(format!("node {}", i));
2055                 let persister = test_utils::TestPersister::new();
2056                 let seed = [i as u8; 32];
2057                 let keys_manager = test_utils::TestKeysInterface::new(&seed, Network::Testnet);
2058
2059                 chan_mon_cfgs.push(TestChanMonCfg{ tx_broadcaster, fee_estimator, chain_source, logger, persister, keys_manager });
2060         }
2061
2062         chan_mon_cfgs
2063 }
2064
2065 pub fn create_node_cfgs<'a>(node_count: usize, chanmon_cfgs: &'a Vec<TestChanMonCfg>) -> Vec<NodeCfg<'a>> {
2066         let mut nodes = Vec::new();
2067
2068         for i in 0..node_count {
2069                 let chain_monitor = test_utils::TestChainMonitor::new(Some(&chanmon_cfgs[i].chain_source), &chanmon_cfgs[i].tx_broadcaster, &chanmon_cfgs[i].logger, &chanmon_cfgs[i].fee_estimator, &chanmon_cfgs[i].persister, &chanmon_cfgs[i].keys_manager);
2070                 let seed = [i as u8; 32];
2071                 nodes.push(NodeCfg {
2072                         chain_source: &chanmon_cfgs[i].chain_source,
2073                         logger: &chanmon_cfgs[i].logger,
2074                         tx_broadcaster: &chanmon_cfgs[i].tx_broadcaster,
2075                         fee_estimator: &chanmon_cfgs[i].fee_estimator,
2076                         chain_monitor,
2077                         keys_manager: &chanmon_cfgs[i].keys_manager,
2078                         node_seed: seed,
2079                         features: channelmanager::provided_init_features(),
2080                         network_graph: NetworkGraph::new(chanmon_cfgs[i].chain_source.genesis_hash, &chanmon_cfgs[i].logger),
2081                 });
2082         }
2083
2084         nodes
2085 }
2086
2087 pub fn test_default_channel_config() -> UserConfig {
2088         let mut default_config = UserConfig::default();
2089         // Set cltv_expiry_delta slightly lower to keep the final CLTV values inside one byte in our
2090         // tests so that our script-length checks don't fail (see ACCEPTED_HTLC_SCRIPT_WEIGHT).
2091         default_config.channel_config.cltv_expiry_delta = MIN_CLTV_EXPIRY_DELTA;
2092         default_config.channel_handshake_config.announced_channel = true;
2093         default_config.channel_handshake_limits.force_announced_channel_preference = false;
2094         // When most of our tests were written, the default HTLC minimum was fixed at 1000.
2095         // It now defaults to 1, so we simply set it to the expected value here.
2096         default_config.channel_handshake_config.our_htlc_minimum_msat = 1000;
2097         // When most of our tests were written, we didn't have the notion of a `max_dust_htlc_exposure_msat`,
2098         // It now defaults to 5_000_000 msat; to avoid interfering with tests we bump it to 50_000_000 msat.
2099         default_config.channel_config.max_dust_htlc_exposure_msat = 50_000_000;
2100         default_config
2101 }
2102
2103 pub fn create_node_chanmgrs<'a, 'b>(node_count: usize, cfgs: &'a Vec<NodeCfg<'b>>, node_config: &[Option<UserConfig>]) -> Vec<ChannelManager<&'a TestChainMonitor<'b>, &'b test_utils::TestBroadcaster, &'a test_utils::TestKeysInterface, &'b test_utils::TestFeeEstimator, &'b test_utils::TestLogger>> {
2104         let mut chanmgrs = Vec::new();
2105         for i in 0..node_count {
2106                 let network = Network::Testnet;
2107                 let params = ChainParameters {
2108                         network,
2109                         best_block: BestBlock::from_genesis(network),
2110                 };
2111                 let node = ChannelManager::new(cfgs[i].fee_estimator, &cfgs[i].chain_monitor, cfgs[i].tx_broadcaster, cfgs[i].logger, cfgs[i].keys_manager,
2112                         if node_config[i].is_some() { node_config[i].clone().unwrap() } else { test_default_channel_config() }, params);
2113                 chanmgrs.push(node);
2114         }
2115
2116         chanmgrs
2117 }
2118
2119 pub fn create_network<'a, 'b: 'a, 'c: 'b>(node_count: usize, cfgs: &'b Vec<NodeCfg<'c>>, chan_mgrs: &'a Vec<ChannelManager<&'b TestChainMonitor<'c>, &'c test_utils::TestBroadcaster, &'b test_utils::TestKeysInterface, &'c test_utils::TestFeeEstimator, &'c test_utils::TestLogger>>) -> Vec<Node<'a, 'b, 'c>> {
2120         let mut nodes = Vec::new();
2121         let chan_count = Rc::new(RefCell::new(0));
2122         let payment_count = Rc::new(RefCell::new(0));
2123         let connect_style = Rc::new(RefCell::new(ConnectStyle::random_style()));
2124
2125         for i in 0..node_count {
2126                 let gossip_sync = P2PGossipSync::new(&cfgs[i].network_graph, None, cfgs[i].logger);
2127                 nodes.push(Node{
2128                         chain_source: cfgs[i].chain_source, tx_broadcaster: cfgs[i].tx_broadcaster,
2129                         chain_monitor: &cfgs[i].chain_monitor, keys_manager: &cfgs[i].keys_manager,
2130                         node: &chan_mgrs[i], network_graph: &cfgs[i].network_graph, gossip_sync,
2131                         node_seed: cfgs[i].node_seed, network_chan_count: chan_count.clone(),
2132                         network_payment_count: payment_count.clone(), logger: cfgs[i].logger,
2133                         blocks: Arc::clone(&cfgs[i].tx_broadcaster.blocks),
2134                         connect_style: Rc::clone(&connect_style),
2135                 })
2136         }
2137
2138         for i in 0..node_count {
2139                 for j in (i+1)..node_count {
2140                         nodes[i].node.peer_connected(&nodes[j].node.get_our_node_id(), &msgs::Init { features: cfgs[j].features.clone(), remote_network_address: None }).unwrap();
2141                         nodes[j].node.peer_connected(&nodes[i].node.get_our_node_id(), &msgs::Init { features: cfgs[i].features.clone(), remote_network_address: None }).unwrap();
2142                 }
2143         }
2144
2145         nodes
2146 }
2147
2148 // Note that the following only works for CLTV values up to 128
2149 pub const ACCEPTED_HTLC_SCRIPT_WEIGHT: usize = 137; //Here we have a diff due to HTLC CLTV expiry being < 2^15 in test
2150
2151 #[derive(PartialEq)]
2152 pub enum HTLCType { NONE, TIMEOUT, SUCCESS }
2153 /// Tests that the given node has broadcast transactions for the given Channel
2154 ///
2155 /// First checks that the latest holder commitment tx has been broadcast, unless an explicit
2156 /// commitment_tx is provided, which may be used to test that a remote commitment tx was
2157 /// broadcast and the revoked outputs were claimed.
2158 ///
2159 /// Next tests that there is (or is not) a transaction that spends the commitment transaction
2160 /// that appears to be the type of HTLC transaction specified in has_htlc_tx.
2161 ///
2162 /// All broadcast transactions must be accounted for in one of the above three types of we'll
2163 /// also fail.
2164 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>  {
2165         let mut node_txn = node.tx_broadcaster.txn_broadcasted.lock().unwrap();
2166         assert!(node_txn.len() >= if commitment_tx.is_some() { 0 } else { 1 } + if has_htlc_tx == HTLCType::NONE { 0 } else { 1 });
2167
2168         let mut res = Vec::with_capacity(2);
2169         node_txn.retain(|tx| {
2170                 if tx.input.len() == 1 && tx.input[0].previous_output.txid == chan.3.txid() {
2171                         check_spends!(tx, chan.3);
2172                         if commitment_tx.is_none() {
2173                                 res.push(tx.clone());
2174                         }
2175                         false
2176                 } else { true }
2177         });
2178         if let Some(explicit_tx) = commitment_tx {
2179                 res.push(explicit_tx.clone());
2180         }
2181
2182         assert_eq!(res.len(), 1);
2183
2184         if has_htlc_tx != HTLCType::NONE {
2185                 node_txn.retain(|tx| {
2186                         if tx.input.len() == 1 && tx.input[0].previous_output.txid == res[0].txid() {
2187                                 check_spends!(tx, res[0]);
2188                                 if has_htlc_tx == HTLCType::TIMEOUT {
2189                                         assert!(tx.lock_time.0 != 0);
2190                                 } else {
2191                                         assert!(tx.lock_time.0 == 0);
2192                                 }
2193                                 res.push(tx.clone());
2194                                 false
2195                         } else { true }
2196                 });
2197                 assert!(res.len() == 2 || res.len() == 3);
2198                 if res.len() == 3 {
2199                         assert_eq!(res[1], res[2]);
2200                 }
2201         }
2202
2203         assert!(node_txn.is_empty());
2204         res
2205 }
2206
2207 /// Tests that the given node has broadcast a claim transaction against the provided revoked
2208 /// HTLC transaction.
2209 pub fn test_revoked_htlc_claim_txn_broadcast<'a, 'b, 'c>(node: &Node<'a, 'b, 'c>, revoked_tx: Transaction, commitment_revoked_tx: Transaction)  {
2210         let mut node_txn = node.tx_broadcaster.txn_broadcasted.lock().unwrap();
2211         // We may issue multiple claiming transaction on revoked outputs due to block rescan
2212         // for revoked htlc outputs
2213         if node_txn.len() != 1 && node_txn.len() != 2 && node_txn.len() != 3 { assert!(false); }
2214         node_txn.retain(|tx| {
2215                 if tx.input.len() == 1 && tx.input[0].previous_output.txid == revoked_tx.txid() {
2216                         check_spends!(tx, revoked_tx);
2217                         false
2218                 } else { true }
2219         });
2220         node_txn.retain(|tx| {
2221                 check_spends!(tx, commitment_revoked_tx);
2222                 false
2223         });
2224         assert!(node_txn.is_empty());
2225 }
2226
2227 pub fn check_preimage_claim<'a, 'b, 'c>(node: &Node<'a, 'b, 'c>, prev_txn: &Vec<Transaction>) -> Vec<Transaction>  {
2228         let mut node_txn = node.tx_broadcaster.txn_broadcasted.lock().unwrap();
2229
2230         assert!(node_txn.len() >= 1);
2231         assert_eq!(node_txn[0].input.len(), 1);
2232         let mut found_prev = false;
2233
2234         for tx in prev_txn {
2235                 if node_txn[0].input[0].previous_output.txid == tx.txid() {
2236                         check_spends!(node_txn[0], tx);
2237                         let mut iter = node_txn[0].input[0].witness.iter();
2238                         iter.next().expect("expected 3 witness items");
2239                         iter.next().expect("expected 3 witness items");
2240                         assert!(iter.next().expect("expected 3 witness items").len() > 106); // must spend an htlc output
2241                         assert_eq!(tx.input.len(), 1); // must spend a commitment tx
2242
2243                         found_prev = true;
2244                         break;
2245                 }
2246         }
2247         assert!(found_prev);
2248
2249         let mut res = Vec::new();
2250         mem::swap(&mut *node_txn, &mut res);
2251         res
2252 }
2253
2254 pub fn handle_announce_close_broadcast_events<'a, 'b, 'c>(nodes: &Vec<Node<'a, 'b, 'c>>, a: usize, b: usize, needs_err_handle: bool, expected_error: &str)  {
2255         let events_1 = nodes[a].node.get_and_clear_pending_msg_events();
2256         assert_eq!(events_1.len(), 2);
2257         let as_update = match events_1[0] {
2258                 MessageSendEvent::BroadcastChannelUpdate { ref msg } => {
2259                         msg.clone()
2260                 },
2261                 _ => panic!("Unexpected event"),
2262         };
2263         match events_1[1] {
2264                 MessageSendEvent::HandleError { node_id, action: msgs::ErrorAction::SendErrorMessage { ref msg } } => {
2265                         assert_eq!(node_id, nodes[b].node.get_our_node_id());
2266                         assert_eq!(msg.data, expected_error);
2267                         if needs_err_handle {
2268                                 nodes[b].node.handle_error(&nodes[a].node.get_our_node_id(), msg);
2269                         }
2270                 },
2271                 _ => panic!("Unexpected event"),
2272         }
2273
2274         let events_2 = nodes[b].node.get_and_clear_pending_msg_events();
2275         assert_eq!(events_2.len(), if needs_err_handle { 1 } else { 2 });
2276         let bs_update = match events_2[0] {
2277                 MessageSendEvent::BroadcastChannelUpdate { ref msg } => {
2278                         msg.clone()
2279                 },
2280                 _ => panic!("Unexpected event"),
2281         };
2282         if !needs_err_handle {
2283                 match events_2[1] {
2284                         MessageSendEvent::HandleError { node_id, action: msgs::ErrorAction::SendErrorMessage { ref msg } } => {
2285                                 assert_eq!(node_id, nodes[a].node.get_our_node_id());
2286                                 assert_eq!(msg.data, expected_error);
2287                         },
2288                         _ => panic!("Unexpected event"),
2289                 }
2290         }
2291
2292         for node in nodes {
2293                 node.gossip_sync.handle_channel_update(&as_update).unwrap();
2294                 node.gossip_sync.handle_channel_update(&bs_update).unwrap();
2295         }
2296 }
2297
2298 pub fn get_announce_close_broadcast_events<'a, 'b, 'c>(nodes: &Vec<Node<'a, 'b, 'c>>, a: usize, b: usize)  {
2299         handle_announce_close_broadcast_events(nodes, a, b, false, "Channel closed because commitment or closing transaction was confirmed on chain.");
2300 }
2301
2302 #[cfg(test)]
2303 macro_rules! get_channel_value_stat {
2304         ($node: expr, $channel_id: expr) => {{
2305                 let chan_lock = $node.node.channel_state.lock().unwrap();
2306                 let chan = chan_lock.by_id.get(&$channel_id).unwrap();
2307                 chan.get_value_stat()
2308         }}
2309 }
2310
2311 macro_rules! get_chan_reestablish_msgs {
2312         ($src_node: expr, $dst_node: expr) => {
2313                 {
2314                         let mut announcements = $crate::prelude::HashSet::new();
2315                         let mut res = Vec::with_capacity(1);
2316                         for msg in $src_node.node.get_and_clear_pending_msg_events() {
2317                                 if let MessageSendEvent::SendChannelReestablish { ref node_id, ref msg } = msg {
2318                                         assert_eq!(*node_id, $dst_node.node.get_our_node_id());
2319                                         res.push(msg.clone());
2320                                 } else if let MessageSendEvent::SendChannelAnnouncement { ref node_id, ref msg, .. } = msg {
2321                                         assert_eq!(*node_id, $dst_node.node.get_our_node_id());
2322                                         announcements.insert(msg.contents.short_channel_id);
2323                                 } else {
2324                                         panic!("Unexpected event")
2325                                 }
2326                         }
2327                         for chan in $src_node.node.list_channels() {
2328                                 if chan.is_public && chan.counterparty.node_id != $dst_node.node.get_our_node_id() {
2329                                         if let Some(scid) = chan.short_channel_id {
2330                                                 assert!(announcements.remove(&scid));
2331                                         }
2332                                 }
2333                         }
2334                         assert!(announcements.is_empty());
2335                         res
2336                 }
2337         }
2338 }
2339
2340 macro_rules! handle_chan_reestablish_msgs {
2341         ($src_node: expr, $dst_node: expr) => {
2342                 {
2343                         let msg_events = $src_node.node.get_and_clear_pending_msg_events();
2344                         let mut idx = 0;
2345                         let channel_ready = if let Some(&MessageSendEvent::SendChannelReady { ref node_id, ref msg }) = msg_events.get(0) {
2346                                 idx += 1;
2347                                 assert_eq!(*node_id, $dst_node.node.get_our_node_id());
2348                                 Some(msg.clone())
2349                         } else {
2350                                 None
2351                         };
2352
2353                         if let Some(&MessageSendEvent::SendAnnouncementSignatures { ref node_id, msg: _ }) = msg_events.get(idx) {
2354                                 idx += 1;
2355                                 assert_eq!(*node_id, $dst_node.node.get_our_node_id());
2356                         }
2357
2358                         let mut revoke_and_ack = None;
2359                         let mut commitment_update = None;
2360                         let order = if let Some(ev) = msg_events.get(idx) {
2361                                 match ev {
2362                                         &MessageSendEvent::SendRevokeAndACK { ref node_id, ref msg } => {
2363                                                 assert_eq!(*node_id, $dst_node.node.get_our_node_id());
2364                                                 revoke_and_ack = Some(msg.clone());
2365                                                 idx += 1;
2366                                                 RAACommitmentOrder::RevokeAndACKFirst
2367                                         },
2368                                         &MessageSendEvent::UpdateHTLCs { ref node_id, ref updates } => {
2369                                                 assert_eq!(*node_id, $dst_node.node.get_our_node_id());
2370                                                 commitment_update = Some(updates.clone());
2371                                                 idx += 1;
2372                                                 RAACommitmentOrder::CommitmentFirst
2373                                         },
2374                                         _ => RAACommitmentOrder::CommitmentFirst,
2375                                 }
2376                         } else {
2377                                 RAACommitmentOrder::CommitmentFirst
2378                         };
2379
2380                         if let Some(ev) = msg_events.get(idx) {
2381                                 match ev {
2382                                         &MessageSendEvent::SendRevokeAndACK { ref node_id, ref msg } => {
2383                                                 assert_eq!(*node_id, $dst_node.node.get_our_node_id());
2384                                                 assert!(revoke_and_ack.is_none());
2385                                                 revoke_and_ack = Some(msg.clone());
2386                                                 idx += 1;
2387                                         },
2388                                         &MessageSendEvent::UpdateHTLCs { ref node_id, ref updates } => {
2389                                                 assert_eq!(*node_id, $dst_node.node.get_our_node_id());
2390                                                 assert!(commitment_update.is_none());
2391                                                 commitment_update = Some(updates.clone());
2392                                                 idx += 1;
2393                                         },
2394                                         _ => {},
2395                                 }
2396                         }
2397
2398                         if let Some(&MessageSendEvent::SendChannelUpdate { ref node_id, ref msg }) = msg_events.get(idx) {
2399                                 assert_eq!(*node_id, $dst_node.node.get_our_node_id());
2400                                 idx += 1;
2401                                 assert_eq!(msg.contents.flags & 2, 0); // "disabled" flag must not be set as we just reconnected.
2402                         }
2403
2404                         assert_eq!(msg_events.len(), idx);
2405
2406                         (channel_ready, revoke_and_ack, commitment_update, order)
2407                 }
2408         }
2409 }
2410
2411 /// pending_htlc_adds includes both the holding cell and in-flight update_add_htlcs, whereas
2412 /// for claims/fails they are separated out.
2413 pub fn reconnect_nodes<'a, 'b, 'c>(node_a: &Node<'a, 'b, 'c>, node_b: &Node<'a, 'b, 'c>, send_channel_ready: (bool, bool), pending_htlc_adds: (i64, i64), pending_htlc_claims: (usize, usize), pending_htlc_fails: (usize, usize), pending_cell_htlc_claims: (usize, usize), pending_cell_htlc_fails: (usize, usize), pending_raa: (bool, bool))  {
2414         node_a.node.peer_connected(&node_b.node.get_our_node_id(), &msgs::Init { features: channelmanager::provided_init_features(), remote_network_address: None }).unwrap();
2415         let reestablish_1 = get_chan_reestablish_msgs!(node_a, node_b);
2416         node_b.node.peer_connected(&node_a.node.get_our_node_id(), &msgs::Init { features: channelmanager::provided_init_features(), remote_network_address: None }).unwrap();
2417         let reestablish_2 = get_chan_reestablish_msgs!(node_b, node_a);
2418
2419         if send_channel_ready.0 {
2420                 // If a expects a channel_ready, it better not think it has received a revoke_and_ack
2421                 // from b
2422                 for reestablish in reestablish_1.iter() {
2423                         assert_eq!(reestablish.next_remote_commitment_number, 0);
2424                 }
2425         }
2426         if send_channel_ready.1 {
2427                 // If b expects a channel_ready, it better not think it has received a revoke_and_ack
2428                 // from a
2429                 for reestablish in reestablish_2.iter() {
2430                         assert_eq!(reestablish.next_remote_commitment_number, 0);
2431                 }
2432         }
2433         if send_channel_ready.0 || send_channel_ready.1 {
2434                 // If we expect any channel_ready's, both sides better have set
2435                 // next_holder_commitment_number to 1
2436                 for reestablish in reestablish_1.iter() {
2437                         assert_eq!(reestablish.next_local_commitment_number, 1);
2438                 }
2439                 for reestablish in reestablish_2.iter() {
2440                         assert_eq!(reestablish.next_local_commitment_number, 1);
2441                 }
2442         }
2443
2444         let mut resp_1 = Vec::new();
2445         for msg in reestablish_1 {
2446                 node_b.node.handle_channel_reestablish(&node_a.node.get_our_node_id(), &msg);
2447                 resp_1.push(handle_chan_reestablish_msgs!(node_b, node_a));
2448         }
2449         if pending_cell_htlc_claims.0 != 0 || pending_cell_htlc_fails.0 != 0 {
2450                 check_added_monitors!(node_b, 1);
2451         } else {
2452                 check_added_monitors!(node_b, 0);
2453         }
2454
2455         let mut resp_2 = Vec::new();
2456         for msg in reestablish_2 {
2457                 node_a.node.handle_channel_reestablish(&node_b.node.get_our_node_id(), &msg);
2458                 resp_2.push(handle_chan_reestablish_msgs!(node_a, node_b));
2459         }
2460         if pending_cell_htlc_claims.1 != 0 || pending_cell_htlc_fails.1 != 0 {
2461                 check_added_monitors!(node_a, 1);
2462         } else {
2463                 check_added_monitors!(node_a, 0);
2464         }
2465
2466         // We don't yet support both needing updates, as that would require a different commitment dance:
2467         assert!((pending_htlc_adds.0 == 0 && pending_htlc_claims.0 == 0 && pending_htlc_fails.0 == 0 &&
2468                          pending_cell_htlc_claims.0 == 0 && pending_cell_htlc_fails.0 == 0) ||
2469                         (pending_htlc_adds.1 == 0 && pending_htlc_claims.1 == 0 && pending_htlc_fails.1 == 0 &&
2470                          pending_cell_htlc_claims.1 == 0 && pending_cell_htlc_fails.1 == 0));
2471
2472         for chan_msgs in resp_1.drain(..) {
2473                 if send_channel_ready.0 {
2474                         node_a.node.handle_channel_ready(&node_b.node.get_our_node_id(), &chan_msgs.0.unwrap());
2475                         let announcement_event = node_a.node.get_and_clear_pending_msg_events();
2476                         if !announcement_event.is_empty() {
2477                                 assert_eq!(announcement_event.len(), 1);
2478                                 if let MessageSendEvent::SendChannelUpdate { .. } = announcement_event[0] {
2479                                         //TODO: Test announcement_sigs re-sending
2480                                 } else { panic!("Unexpected event! {:?}", announcement_event[0]); }
2481                         }
2482                 } else {
2483                         assert!(chan_msgs.0.is_none());
2484                 }
2485                 if pending_raa.0 {
2486                         assert!(chan_msgs.3 == RAACommitmentOrder::RevokeAndACKFirst);
2487                         node_a.node.handle_revoke_and_ack(&node_b.node.get_our_node_id(), &chan_msgs.1.unwrap());
2488                         assert!(node_a.node.get_and_clear_pending_msg_events().is_empty());
2489                         check_added_monitors!(node_a, 1);
2490                 } else {
2491                         assert!(chan_msgs.1.is_none());
2492                 }
2493                 if pending_htlc_adds.0 != 0 || pending_htlc_claims.0 != 0 || pending_htlc_fails.0 != 0 || pending_cell_htlc_claims.0 != 0 || pending_cell_htlc_fails.0 != 0 {
2494                         let commitment_update = chan_msgs.2.unwrap();
2495                         if pending_htlc_adds.0 != -1 { // We use -1 to denote a response commitment_signed
2496                                 assert_eq!(commitment_update.update_add_htlcs.len(), pending_htlc_adds.0 as usize);
2497                         } else {
2498                                 assert!(commitment_update.update_add_htlcs.is_empty());
2499                         }
2500                         assert_eq!(commitment_update.update_fulfill_htlcs.len(), pending_htlc_claims.0 + pending_cell_htlc_claims.0);
2501                         assert_eq!(commitment_update.update_fail_htlcs.len(), pending_htlc_fails.0 + pending_cell_htlc_fails.0);
2502                         assert!(commitment_update.update_fail_malformed_htlcs.is_empty());
2503                         for update_add in commitment_update.update_add_htlcs {
2504                                 node_a.node.handle_update_add_htlc(&node_b.node.get_our_node_id(), &update_add);
2505                         }
2506                         for update_fulfill in commitment_update.update_fulfill_htlcs {
2507                                 node_a.node.handle_update_fulfill_htlc(&node_b.node.get_our_node_id(), &update_fulfill);
2508                         }
2509                         for update_fail in commitment_update.update_fail_htlcs {
2510                                 node_a.node.handle_update_fail_htlc(&node_b.node.get_our_node_id(), &update_fail);
2511                         }
2512
2513                         if pending_htlc_adds.0 != -1 { // We use -1 to denote a response commitment_signed
2514                                 commitment_signed_dance!(node_a, node_b, commitment_update.commitment_signed, false);
2515                         } else {
2516                                 node_a.node.handle_commitment_signed(&node_b.node.get_our_node_id(), &commitment_update.commitment_signed);
2517                                 check_added_monitors!(node_a, 1);
2518                                 let as_revoke_and_ack = get_event_msg!(node_a, MessageSendEvent::SendRevokeAndACK, node_b.node.get_our_node_id());
2519                                 // No commitment_signed so get_event_msg's assert(len == 1) passes
2520                                 node_b.node.handle_revoke_and_ack(&node_a.node.get_our_node_id(), &as_revoke_and_ack);
2521                                 assert!(node_b.node.get_and_clear_pending_msg_events().is_empty());
2522                                 check_added_monitors!(node_b, 1);
2523                         }
2524                 } else {
2525                         assert!(chan_msgs.2.is_none());
2526                 }
2527         }
2528
2529         for chan_msgs in resp_2.drain(..) {
2530                 if send_channel_ready.1 {
2531                         node_b.node.handle_channel_ready(&node_a.node.get_our_node_id(), &chan_msgs.0.unwrap());
2532                         let announcement_event = node_b.node.get_and_clear_pending_msg_events();
2533                         if !announcement_event.is_empty() {
2534                                 assert_eq!(announcement_event.len(), 1);
2535                                 match announcement_event[0] {
2536                                         MessageSendEvent::SendChannelUpdate { .. } => {},
2537                                         MessageSendEvent::SendAnnouncementSignatures { .. } => {},
2538                                         _ => panic!("Unexpected event {:?}!", announcement_event[0]),
2539                                 }
2540                         }
2541                 } else {
2542                         assert!(chan_msgs.0.is_none());
2543                 }
2544                 if pending_raa.1 {
2545                         assert!(chan_msgs.3 == RAACommitmentOrder::RevokeAndACKFirst);
2546                         node_b.node.handle_revoke_and_ack(&node_a.node.get_our_node_id(), &chan_msgs.1.unwrap());
2547                         assert!(node_b.node.get_and_clear_pending_msg_events().is_empty());
2548                         check_added_monitors!(node_b, 1);
2549                 } else {
2550                         assert!(chan_msgs.1.is_none());
2551                 }
2552                 if pending_htlc_adds.1 != 0 || pending_htlc_claims.1 != 0 || pending_htlc_fails.1 != 0 || pending_cell_htlc_claims.1 != 0 || pending_cell_htlc_fails.1 != 0 {
2553                         let commitment_update = chan_msgs.2.unwrap();
2554                         if pending_htlc_adds.1 != -1 { // We use -1 to denote a response commitment_signed
2555                                 assert_eq!(commitment_update.update_add_htlcs.len(), pending_htlc_adds.1 as usize);
2556                         }
2557                         assert_eq!(commitment_update.update_fulfill_htlcs.len(), pending_htlc_claims.1 + pending_cell_htlc_claims.1);
2558                         assert_eq!(commitment_update.update_fail_htlcs.len(), pending_htlc_fails.1 + pending_cell_htlc_fails.1);
2559                         assert!(commitment_update.update_fail_malformed_htlcs.is_empty());
2560                         for update_add in commitment_update.update_add_htlcs {
2561                                 node_b.node.handle_update_add_htlc(&node_a.node.get_our_node_id(), &update_add);
2562                         }
2563                         for update_fulfill in commitment_update.update_fulfill_htlcs {
2564                                 node_b.node.handle_update_fulfill_htlc(&node_a.node.get_our_node_id(), &update_fulfill);
2565                         }
2566                         for update_fail in commitment_update.update_fail_htlcs {
2567                                 node_b.node.handle_update_fail_htlc(&node_a.node.get_our_node_id(), &update_fail);
2568                         }
2569
2570                         if pending_htlc_adds.1 != -1 { // We use -1 to denote a response commitment_signed
2571                                 commitment_signed_dance!(node_b, node_a, commitment_update.commitment_signed, false);
2572                         } else {
2573                                 node_b.node.handle_commitment_signed(&node_a.node.get_our_node_id(), &commitment_update.commitment_signed);
2574                                 check_added_monitors!(node_b, 1);
2575                                 let bs_revoke_and_ack = get_event_msg!(node_b, MessageSendEvent::SendRevokeAndACK, node_a.node.get_our_node_id());
2576                                 // No commitment_signed so get_event_msg's assert(len == 1) passes
2577                                 node_a.node.handle_revoke_and_ack(&node_b.node.get_our_node_id(), &bs_revoke_and_ack);
2578                                 assert!(node_a.node.get_and_clear_pending_msg_events().is_empty());
2579                                 check_added_monitors!(node_a, 1);
2580                         }
2581                 } else {
2582                         assert!(chan_msgs.2.is_none());
2583                 }
2584         }
2585 }