_ 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::EntropySource};
  14 use crate::chain::channelmonitor::ChannelMonitor;
  15 use crate::chain::transaction::OutPoint;
  16 use crate::ln::{PaymentPreimage, PaymentHash, PaymentSecret};
  17 use crate::ln::channelmanager::{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 single 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 a single block containing the given transactions
  70 pub fn mine_transactions<'a, 'b, 'c, 'd>(node: &'a Node<'b, 'c, 'd>, txn: &[&Transaction]) {
  71         let height = node.best_block_info().1 + 1;
  72         confirm_transactions_at(node, txn, height);
  73 }
  74 /// Mine the given transaction at the given height, mining blocks as required to build to that
  75 /// height
  76 ///
  77 /// Returns the SCID a channel confirmed in the given transaction will have, assuming the funding
  78 /// output is the 1st output in the transaction.
  79 pub fn confirm_transactions_at<'a, 'b, 'c, 'd>(node: &'a Node<'b, 'c, 'd>, txn: &[&Transaction], conf_height: u32) -> u64 {
  80         let first_connect_height = node.best_block_info().1 + 1;
  81         assert!(first_connect_height <= conf_height);
  82         if conf_height > first_connect_height {
  83                 connect_blocks(node, conf_height - first_connect_height);
  84         }
  85         let mut block = Block {
  86                 header: BlockHeader { version: 0x20000000, prev_blockhash: node.best_block_hash(), merkle_root: TxMerkleNode::all_zeros(), time: conf_height, bits: 42, nonce: 42 },
  87                 txdata: Vec::new(),
  88         };
  89         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
  90                 block.txdata.push(Transaction { version: 0, lock_time: PackedLockTime::ZERO, input: Vec::new(), output: Vec::new() });
  91         }
  92         for tx in txn {
  93                 block.txdata.push((*tx).clone());
  94         }
  95         connect_block(node, &block);
  96         scid_utils::scid_from_parts(conf_height as u64, block.txdata.len() as u64 - 1, 0).unwrap()
  97 }
  98 pub fn confirm_transaction_at<'a, 'b, 'c, 'd>(node: &'a Node<'b, 'c, 'd>, tx: &Transaction, conf_height: u32) -> u64 {
  99         confirm_transactions_at(node, &[tx], conf_height)
 100 }
 101
 102 /// The possible ways we may notify a ChannelManager of a new block
 103 #[derive(Clone, Copy, Debug, PartialEq)]
 104 pub enum ConnectStyle {
 105         /// Calls `best_block_updated` first, detecting transactions in the block only after receiving
 106         /// the header and height information.
 107         BestBlockFirst,
 108         /// The same as `BestBlockFirst`, however when we have multiple blocks to connect, we only
 109         /// make a single `best_block_updated` call.
 110         BestBlockFirstSkippingBlocks,
 111         /// The same as `BestBlockFirst` when connecting blocks. During disconnection only
 112         /// `transaction_unconfirmed` is called.
 113         BestBlockFirstReorgsOnlyTip,
 114         /// Calls `transactions_confirmed` first, detecting transactions in the block before updating
 115         /// the header and height information.
 116         TransactionsFirst,
 117         /// The same as `TransactionsFirst`, however when we have multiple blocks to connect, we only
 118         /// make a single `best_block_updated` call.
 119         TransactionsFirstSkippingBlocks,
 120         /// The same as `TransactionsFirst`, however when we have multiple blocks to connect, we only
 121         /// make a single `best_block_updated` call. Further, we call `transactions_confirmed` multiple
 122         /// times to ensure it's idempotent.
 123         TransactionsDuplicativelyFirstSkippingBlocks,
 124         /// The same as `TransactionsFirst`, however when we have multiple blocks to connect, we only
 125         /// make a single `best_block_updated` call. Further, we call `transactions_confirmed` multiple
 126         /// times to ensure it's idempotent.
 127         HighlyRedundantTransactionsFirstSkippingBlocks,
 128         /// The same as `TransactionsFirst` when connecting blocks. During disconnection only
 129         /// `transaction_unconfirmed` is called.
 130         TransactionsFirstReorgsOnlyTip,
 131         /// Provides the full block via the `chain::Listen` interface. In the current code this is
 132         /// equivalent to `TransactionsFirst` with some additional assertions.
 133         FullBlockViaListen,
 134 }
 135
 136 impl ConnectStyle {
 137         fn random_style() -> ConnectStyle {
 138                 #[cfg(feature = "std")] {
 139                         use core::hash::{BuildHasher, Hasher};
 140                         // Get a random value using the only std API to do so - the DefaultHasher
 141                         let rand_val = std::collections::hash_map::RandomState::new().build_hasher().finish();
 142                         let res = match rand_val % 9 {
 143                                 0 => ConnectStyle::BestBlockFirst,
 144                                 1 => ConnectStyle::BestBlockFirstSkippingBlocks,
 145                                 2 => ConnectStyle::BestBlockFirstReorgsOnlyTip,
 146                                 3 => ConnectStyle::TransactionsFirst,
 147                                 4 => ConnectStyle::TransactionsFirstSkippingBlocks,
 148                                 5 => ConnectStyle::TransactionsDuplicativelyFirstSkippingBlocks,
 149                                 6 => ConnectStyle::HighlyRedundantTransactionsFirstSkippingBlocks,
 150                                 7 => ConnectStyle::TransactionsFirstReorgsOnlyTip,
 151                                 8 => ConnectStyle::FullBlockViaListen,
 152                                 _ => unreachable!(),
 153                         };
 154                         eprintln!("Using Block Connection Style: {:?}", res);
 155                         res
 156                 }
 157                 #[cfg(not(feature = "std"))] {
 158                         ConnectStyle::FullBlockViaListen
 159                 }
 160         }
 161 }
 162
 163 pub fn connect_blocks<'a, 'b, 'c, 'd>(node: &'a Node<'b, 'c, 'd>, depth: u32) -> BlockHash {
 164         let skip_intermediaries = match *node.connect_style.borrow() {
 165                 ConnectStyle::BestBlockFirstSkippingBlocks|ConnectStyle::TransactionsFirstSkippingBlocks|
 166                         ConnectStyle::TransactionsDuplicativelyFirstSkippingBlocks|ConnectStyle::HighlyRedundantTransactionsFirstSkippingBlocks|
 167                         ConnectStyle::BestBlockFirstReorgsOnlyTip|ConnectStyle::TransactionsFirstReorgsOnlyTip => true,
 168                 _ => false,
 169         };
 170
 171         let height = node.best_block_info().1 + 1;
 172         let mut block = Block {
 173                 header: BlockHeader { version: 0x2000000, prev_blockhash: node.best_block_hash(), merkle_root: TxMerkleNode::all_zeros(), time: height, bits: 42, nonce: 42 },
 174                 txdata: vec![],
 175         };
 176         assert!(depth >= 1);
 177         for i in 1..depth {
 178                 let prev_blockhash = block.header.block_hash();
 179                 do_connect_block(node, block, skip_intermediaries);
 180                 block = Block {
 181                         header: BlockHeader { version: 0x20000000, prev_blockhash, merkle_root: TxMerkleNode::all_zeros(), time: height + i, bits: 42, nonce: 42 },
 182                         txdata: vec![],
 183                 };
 184         }
 185         let hash = block.header.block_hash();
 186         do_connect_block(node, block, false);
 187         hash
 188 }
 189
 190 pub fn connect_block<'a, 'b, 'c, 'd>(node: &'a Node<'b, 'c, 'd>, block: &Block) {
 191         do_connect_block(node, block.clone(), false);
 192 }
 193
 194 fn call_claimable_balances<'a, 'b, 'c, 'd>(node: &'a Node<'b, 'c, 'd>) {
 195         // Ensure `get_claimable_balances`' self-tests never panic
 196         for funding_outpoint in node.chain_monitor.chain_monitor.list_monitors() {
 197                 node.chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances();
 198         }
 199 }
 200
 201 fn do_connect_block<'a, 'b, 'c, 'd>(node: &'a Node<'b, 'c, 'd>, block: Block, skip_intermediaries: bool) {
 202         call_claimable_balances(node);
 203         let height = node.best_block_info().1 + 1;
 204         #[cfg(feature = "std")] {
 205                 eprintln!("Connecting block using Block Connection Style: {:?}", *node.connect_style.borrow());
 206         }
 207         if !skip_intermediaries {
 208                 let txdata: Vec<_> = block.txdata.iter().enumerate().collect();
 209                 match *node.connect_style.borrow() {
 210                         ConnectStyle::BestBlockFirst|ConnectStyle::BestBlockFirstSkippingBlocks|ConnectStyle::BestBlockFirstReorgsOnlyTip => {
 211                                 node.chain_monitor.chain_monitor.best_block_updated(&block.header, height);
 212                                 call_claimable_balances(node);
 213                                 node.chain_monitor.chain_monitor.transactions_confirmed(&block.header, &txdata, height);
 214                                 node.node.best_block_updated(&block.header, height);
 215                                 node.node.transactions_confirmed(&block.header, &txdata, height);
 216                         },
 217                         ConnectStyle::TransactionsFirst|ConnectStyle::TransactionsFirstSkippingBlocks|
 218                         ConnectStyle::TransactionsDuplicativelyFirstSkippingBlocks|ConnectStyle::HighlyRedundantTransactionsFirstSkippingBlocks|
 219                         ConnectStyle::TransactionsFirstReorgsOnlyTip => {
 220                                 if *node.connect_style.borrow() == ConnectStyle::HighlyRedundantTransactionsFirstSkippingBlocks {
 221                                         let mut connections = Vec::new();
 222                                         for (block, height) in node.blocks.lock().unwrap().iter() {
 223                                                 if !block.txdata.is_empty() {
 224                                                         // Reconnect all transactions we've ever seen to ensure transaction connection
 225                                                         // is *really* idempotent. This is a somewhat likely deployment for some
 226                                                         // esplora implementations of chain sync which try to reduce state and
 227                                                         // complexity as much as possible.
 228                                                         //
 229                                                         // Sadly we have to clone the block here to maintain lockorder. In the
 230                                                         // future we should consider Arc'ing the blocks to avoid this.
 231                                                         connections.push((block.clone(), *height));
 232                                                 }
 233                                         }
 234                                         for (old_block, height) in connections {
 235                                                 node.chain_monitor.chain_monitor.transactions_confirmed(&old_block.header,
 236                                                         &old_block.txdata.iter().enumerate().collect::<Vec<_>>(), height);
 237                                         }
 238                                 }
 239                                 node.chain_monitor.chain_monitor.transactions_confirmed(&block.header, &txdata, height);
 240                                 if *node.connect_style.borrow() == ConnectStyle::TransactionsDuplicativelyFirstSkippingBlocks {
 241                                         node.chain_monitor.chain_monitor.transactions_confirmed(&block.header, &txdata, height);
 242                                 }
 243                                 call_claimable_balances(node);
 244                                 node.chain_monitor.chain_monitor.best_block_updated(&block.header, height);
 245                                 node.node.transactions_confirmed(&block.header, &txdata, height);
 246                                 node.node.best_block_updated(&block.header, height);
 247                         },
 248                         ConnectStyle::FullBlockViaListen => {
 249                                 node.chain_monitor.chain_monitor.block_connected(&block, height);
 250                                 node.node.block_connected(&block, height);
 251                         }
 252                 }
 253         }
 254         call_claimable_balances(node);
 255         node.node.test_process_background_events();
 256         node.blocks.lock().unwrap().push((block, height));
 257 }
 258
 259 pub fn disconnect_blocks<'a, 'b, 'c, 'd>(node: &'a Node<'b, 'c, 'd>, count: u32) {
 260         call_claimable_balances(node);
 261         #[cfg(feature = "std")] {
 262                 eprintln!("Disconnecting {} blocks using Block Connection Style: {:?}", count, *node.connect_style.borrow());
 263         }
 264         for i in 0..count {
 265                 let orig = node.blocks.lock().unwrap().pop().unwrap();
 266                 assert!(orig.1 > 0); // Cannot disconnect genesis
 267                 let prev = node.blocks.lock().unwrap().last().unwrap().clone();
 268
 269                 match *node.connect_style.borrow() {
 270                         ConnectStyle::FullBlockViaListen => {
 271                                 node.chain_monitor.chain_monitor.block_disconnected(&orig.0.header, orig.1);
 272                                 Listen::block_disconnected(node.node, &orig.0.header, orig.1);
 273                         },
 274                         ConnectStyle::BestBlockFirstSkippingBlocks|ConnectStyle::TransactionsFirstSkippingBlocks|
 275                         ConnectStyle::HighlyRedundantTransactionsFirstSkippingBlocks|ConnectStyle::TransactionsDuplicativelyFirstSkippingBlocks => {
 276                                 if i == count - 1 {
 277                                         node.chain_monitor.chain_monitor.best_block_updated(&prev.0.header, prev.1);
 278                                         node.node.best_block_updated(&prev.0.header, prev.1);
 279                                 }
 280                         },
 281                         ConnectStyle::BestBlockFirstReorgsOnlyTip|ConnectStyle::TransactionsFirstReorgsOnlyTip => {
 282                                 for tx in orig.0.txdata {
 283                                         node.chain_monitor.chain_monitor.transaction_unconfirmed(&tx.txid());
 284                                         node.node.transaction_unconfirmed(&tx.txid());
 285                                 }
 286                         },
 287                         _ => {
 288                                 node.chain_monitor.chain_monitor.best_block_updated(&prev.0.header, prev.1);
 289                                 node.node.best_block_updated(&prev.0.header, prev.1);
 290                         },
 291                 }
 292                 call_claimable_balances(node);
 293         }
 294 }
 295
 296 pub fn disconnect_all_blocks<'a, 'b, 'c, 'd>(node: &'a Node<'b, 'c, 'd>) {
 297         let count = node.blocks.lock().unwrap().len() as u32 - 1;
 298         disconnect_blocks(node, count);
 299 }
 300
 301 pub struct TestChanMonCfg {
 302         pub tx_broadcaster: test_utils::TestBroadcaster,
 303         pub fee_estimator: test_utils::TestFeeEstimator,
 304         pub chain_source: test_utils::TestChainSource,
 305         pub persister: test_utils::TestPersister,
 306         pub logger: test_utils::TestLogger,
 307         pub keys_manager: test_utils::TestKeysInterface,
 308 }
 309
 310 pub struct NodeCfg<'a> {
 311         pub chain_source: &'a test_utils::TestChainSource,
 312         pub tx_broadcaster: &'a test_utils::TestBroadcaster,
 313         pub fee_estimator: &'a test_utils::TestFeeEstimator,
 314         pub router: test_utils::TestRouter<'a>,
 315         pub chain_monitor: test_utils::TestChainMonitor<'a>,
 316         pub keys_manager: &'a test_utils::TestKeysInterface,
 317         pub logger: &'a test_utils::TestLogger,
 318         pub network_graph: Arc<NetworkGraph<&'a test_utils::TestLogger>>,
 319         pub node_seed: [u8; 32],
 320         pub override_init_features: Rc<RefCell<Option<InitFeatures>>>,
 321 }
 322
 323 pub struct Node<'a, 'b: 'a, 'c: 'b> {
 324         pub chain_source: &'c test_utils::TestChainSource,
 325         pub tx_broadcaster: &'c test_utils::TestBroadcaster,
 326         pub fee_estimator: &'c test_utils::TestFeeEstimator,
 327         pub router: &'b test_utils::TestRouter<'c>,
 328         pub chain_monitor: &'b test_utils::TestChainMonitor<'c>,
 329         pub keys_manager: &'b test_utils::TestKeysInterface,
 330         pub node: &'a ChannelManager<&'b TestChainMonitor<'c>, &'c test_utils::TestBroadcaster, &'b test_utils::TestKeysInterface, &'b test_utils::TestKeysInterface, &'b test_utils::TestKeysInterface, &'c test_utils::TestFeeEstimator, &'b test_utils::TestRouter<'c>, &'c test_utils::TestLogger>,
 331         pub network_graph: &'a NetworkGraph<&'c test_utils::TestLogger>,
 332         pub gossip_sync: P2PGossipSync<&'b NetworkGraph<&'c test_utils::TestLogger>, &'c test_utils::TestChainSource, &'c test_utils::TestLogger>,
 333         pub node_seed: [u8; 32],
 334         pub network_payment_count: Rc<RefCell<u8>>,
 335         pub network_chan_count: Rc<RefCell<u32>>,
 336         pub logger: &'c test_utils::TestLogger,
 337         pub blocks: Arc<Mutex<Vec<(Block, u32)>>>,
 338         pub connect_style: Rc<RefCell<ConnectStyle>>,
 339         pub override_init_features: Rc<RefCell<Option<InitFeatures>>>,
 340 }
 341 impl<'a, 'b, 'c> Node<'a, 'b, 'c> {
 342         pub fn best_block_hash(&self) -> BlockHash {
 343                 self.blocks.lock().unwrap().last().unwrap().0.block_hash()
 344         }
 345         pub fn best_block_info(&self) -> (BlockHash, u32) {
 346                 self.blocks.lock().unwrap().last().map(|(a, b)| (a.block_hash(), *b)).unwrap()
 347         }
 348         pub fn get_block_header(&self, height: u32) -> BlockHeader {
 349                 self.blocks.lock().unwrap()[height as usize].0.header
 350         }
 351 }
 352
 353 impl<'a, 'b, 'c> Drop for Node<'a, 'b, 'c> {
 354         fn drop(&mut self) {
 355                 if !panicking() {
 356                         // Check that we processed all pending events
 357                         let msg_events = self.node.get_and_clear_pending_msg_events();
 358                         if !msg_events.is_empty() {
 359                                 panic!("Had excess message events on node {}: {:?}", self.logger.id, msg_events);
 360                         }
 361                         let events = self.node.get_and_clear_pending_events();
 362                         if !events.is_empty() {
 363                                 panic!("Had excess events on node {}: {:?}", self.logger.id, events);
 364                         }
 365                         let added_monitors = self.chain_monitor.added_monitors.lock().unwrap().split_off(0);
 366                         if !added_monitors.is_empty() {
 367                                 panic!("Had {} excess added monitors on node {}", added_monitors.len(), self.logger.id);
 368                         }
 369
 370                         // Check that if we serialize the network graph, we can deserialize it again.
 371                         let network_graph = {
 372                                 let mut w = test_utils::TestVecWriter(Vec::new());
 373                                 self.network_graph.write(&mut w).unwrap();
 374                                 let network_graph_deser = <NetworkGraph<_>>::read(&mut io::Cursor::new(&w.0), self.logger).unwrap();
 375                                 assert!(network_graph_deser == *self.network_graph);
 376                                 let gossip_sync = P2PGossipSync::new(
 377                                         &network_graph_deser, Some(self.chain_source), self.logger
 378                                 );
 379                                 let mut chan_progress = 0;
 380                                 loop {
 381                                         let orig_announcements = self.gossip_sync.get_next_channel_announcement(chan_progress);
 382                                         let deserialized_announcements = gossip_sync.get_next_channel_announcement(chan_progress);
 383                                         assert!(orig_announcements == deserialized_announcements);
 384                                         chan_progress = match orig_announcements {
 385                                                 Some(announcement) => announcement.0.contents.short_channel_id + 1,
 386                                                 None => break,
 387                                         };
 388                                 }
 389                                 let mut node_progress = None;
 390                                 loop {
 391                                         let orig_announcements = self.gossip_sync.get_next_node_announcement(node_progress.as_ref());
 392                                         let deserialized_announcements = gossip_sync.get_next_node_announcement(node_progress.as_ref());
 393                                         assert!(orig_announcements == deserialized_announcements);
 394                                         node_progress = match orig_announcements {
 395                                                 Some(announcement) => Some(announcement.contents.node_id),
 396                                                 None => break,
 397                                         };
 398                                 }
 399                                 network_graph_deser
 400                         };
 401
 402                         // Check that if we serialize and then deserialize all our channel monitors we get the
 403                         // same set of outputs to watch for on chain as we have now. Note that if we write
 404                         // tests that fully close channels and remove the monitors at some point this may break.
 405                         let feeest = test_utils::TestFeeEstimator { sat_per_kw: Mutex::new(253) };
 406                         let mut deserialized_monitors = Vec::new();
 407                         {
 408                                 for outpoint in self.chain_monitor.chain_monitor.list_monitors() {
 409                                         let mut w = test_utils::TestVecWriter(Vec::new());
 410                                         self.chain_monitor.chain_monitor.get_monitor(outpoint).unwrap().write(&mut w).unwrap();
 411                                         let (_, deserialized_monitor) = <(BlockHash, ChannelMonitor<EnforcingSigner>)>::read(
 412                                                 &mut io::Cursor::new(&w.0), (self.keys_manager, self.keys_manager)).unwrap();
 413                                         deserialized_monitors.push(deserialized_monitor);
 414                                 }
 415                         }
 416
 417                         let broadcaster = test_utils::TestBroadcaster {
 418                                 txn_broadcasted: Mutex::new(self.tx_broadcaster.txn_broadcasted.lock().unwrap().clone()),
 419                                 blocks: Arc::new(Mutex::new(self.tx_broadcaster.blocks.lock().unwrap().clone())),
 420                         };
 421
 422                         // Before using all the new monitors to check the watch outpoints, use the full set of
 423                         // them to ensure we can write and reload our ChannelManager.
 424                         {
 425                                 let mut channel_monitors = HashMap::new();
 426                                 for monitor in deserialized_monitors.iter_mut() {
 427                                         channel_monitors.insert(monitor.get_funding_txo().0, monitor);
 428                                 }
 429
 430                                 let mut w = test_utils::TestVecWriter(Vec::new());
 431                                 self.node.write(&mut w).unwrap();
 432                                 <(BlockHash, ChannelManager<&test_utils::TestChainMonitor, &test_utils::TestBroadcaster, &test_utils::TestKeysInterface, &test_utils::TestKeysInterface, &test_utils::TestKeysInterface, &test_utils::TestFeeEstimator, &test_utils::TestRouter, &test_utils::TestLogger>)>::read(&mut io::Cursor::new(w.0), ChannelManagerReadArgs {
 433                                         default_config: *self.node.get_current_default_configuration(),
 434                                         entropy_source: self.keys_manager,
 435                                         node_signer: self.keys_manager,
 436                                         signer_provider: self.keys_manager,
 437                                         fee_estimator: &test_utils::TestFeeEstimator { sat_per_kw: Mutex::new(253) },
 438                                         router: &test_utils::TestRouter::new(Arc::new(network_graph)),
 439                                         chain_monitor: self.chain_monitor,
 440                                         tx_broadcaster: &broadcaster,
 441                                         logger: &self.logger,
 442                                         channel_monitors,
 443                                 }).unwrap();
 444                         }
 445
 446                         let persister = test_utils::TestPersister::new();
 447                         let chain_source = test_utils::TestChainSource::new(Network::Testnet);
 448                         let chain_monitor = test_utils::TestChainMonitor::new(Some(&chain_source), &broadcaster, &self.logger, &feeest, &persister, &self.keys_manager);
 449                         for deserialized_monitor in deserialized_monitors.drain(..) {
 450                                 if chain_monitor.watch_channel(deserialized_monitor.get_funding_txo().0, deserialized_monitor) != ChannelMonitorUpdateStatus::Completed {
 451                                         panic!();
 452                                 }
 453                         }
 454                         assert_eq!(*chain_source.watched_txn.lock().unwrap(), *self.chain_source.watched_txn.lock().unwrap());
 455                         assert_eq!(*chain_source.watched_outputs.lock().unwrap(), *self.chain_source.watched_outputs.lock().unwrap());
 456                 }
 457         }
 458 }
 459
 460 pub fn create_chan_between_nodes<'a, 'b, 'c, 'd>(node_a: &'a Node<'b, 'c, 'd>, node_b: &'a Node<'b, 'c, 'd>) -> (msgs::ChannelAnnouncement, msgs::ChannelUpdate, msgs::ChannelUpdate, [u8; 32], Transaction) {
 461         create_chan_between_nodes_with_value(node_a, node_b, 100000, 10001)
 462 }
 463
 464 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) -> (msgs::ChannelAnnouncement, msgs::ChannelUpdate, msgs::ChannelUpdate, [u8; 32], Transaction) {
 465         let (channel_ready, channel_id, tx) = create_chan_between_nodes_with_value_a(node_a, node_b, channel_value, push_msat);
 466         let (announcement, as_update, bs_update) = create_chan_between_nodes_with_value_b(node_a, node_b, &channel_ready);
 467         (announcement, as_update, bs_update, channel_id, tx)
 468 }
 469
 470 #[macro_export]
 471 /// Gets an RAA and CS which were sent in response to a commitment update
 472 macro_rules! get_revoke_commit_msgs {
 473         ($node: expr, $node_id: expr) => {
 474                 {
 475                         use $crate::util::events::MessageSendEvent;
 476                         let events = $node.node.get_and_clear_pending_msg_events();
 477                         assert_eq!(events.len(), 2);
 478                         (match events[0] {
 479                                 MessageSendEvent::SendRevokeAndACK { ref node_id, ref msg } => {
 480                                         assert_eq!(*node_id, $node_id);
 481                                         (*msg).clone()
 482                                 },
 483                                 _ => panic!("Unexpected event"),
 484                         }, match events[1] {
 485                                 MessageSendEvent::UpdateHTLCs { ref node_id, ref updates } => {
 486                                         assert_eq!(*node_id, $node_id);
 487                                         assert!(updates.update_add_htlcs.is_empty());
 488                                         assert!(updates.update_fulfill_htlcs.is_empty());
 489                                         assert!(updates.update_fail_htlcs.is_empty());
 490                                         assert!(updates.update_fail_malformed_htlcs.is_empty());
 491                                         assert!(updates.update_fee.is_none());
 492                                         updates.commitment_signed.clone()
 493                                 },
 494                                 _ => panic!("Unexpected event"),
 495                         })
 496                 }
 497         }
 498 }
 499
 500 /// Get an specific event message from the pending events queue.
 501 #[macro_export]
 502 macro_rules! get_event_msg {
 503         ($node: expr, $event_type: path, $node_id: expr) => {
 504                 {
 505                         let events = $node.node.get_and_clear_pending_msg_events();
 506                         assert_eq!(events.len(), 1);
 507                         match events[0] {
 508                                 $event_type { ref node_id, ref msg } => {
 509                                         assert_eq!(*node_id, $node_id);
 510                                         (*msg).clone()
 511                                 },
 512                                 _ => panic!("Unexpected event"),
 513                         }
 514                 }
 515         }
 516 }
 517
 518 /// Get an error message from the pending events queue.
 519 #[macro_export]
 520 macro_rules! get_err_msg {
 521         ($node: expr, $node_id: expr) => {
 522                 {
 523                         let events = $node.node.get_and_clear_pending_msg_events();
 524                         assert_eq!(events.len(), 1);
 525                         match events[0] {
 526                                 $crate::util::events::MessageSendEvent::HandleError {
 527                                         action: $crate::ln::msgs::ErrorAction::SendErrorMessage { ref msg }, ref node_id
 528                                 } => {
 529                                         assert_eq!(*node_id, $node_id);
 530                                         (*msg).clone()
 531                                 },
 532                                 _ => panic!("Unexpected event"),
 533                         }
 534                 }
 535         }
 536 }
 537
 538 /// Get a specific event from the pending events queue.
 539 #[macro_export]
 540 macro_rules! get_event {
 541         ($node: expr, $event_type: path) => {
 542                 {
 543                         let mut events = $node.node.get_and_clear_pending_events();
 544                         assert_eq!(events.len(), 1);
 545                         let ev = events.pop().unwrap();
 546                         match ev {
 547                                 $event_type { .. } => {
 548                                         ev
 549                                 },
 550                                 _ => panic!("Unexpected event"),
 551                         }
 552                 }
 553         }
 554 }
 555
 556 #[macro_export]
 557 /// Gets an UpdateHTLCs MessageSendEvent
 558 macro_rules! get_htlc_update_msgs {
 559         ($node: expr, $node_id: expr) => {
 560                 {
 561                         let events = $node.node.get_and_clear_pending_msg_events();
 562                         assert_eq!(events.len(), 1);
 563                         match events[0] {
 564                                 $crate::util::events::MessageSendEvent::UpdateHTLCs { ref node_id, ref updates } => {
 565                                         assert_eq!(*node_id, $node_id);
 566                                         (*updates).clone()
 567                                 },
 568                                 _ => panic!("Unexpected event"),
 569                         }
 570                 }
 571         }
 572 }
 573
 574 /// Fetches the first `msg_event` to the passed `node_id` in the passed `msg_events` vec.
 575 /// Returns the `msg_event`, along with an updated `msg_events` vec with the message removed.
 576 ///
 577 /// Note that even though `BroadcastChannelAnnouncement` and `BroadcastChannelUpdate`
 578 /// `msg_events` are stored under specific peers, this function does not fetch such `msg_events` as
 579 /// such messages are intended to all peers.
 580 pub fn remove_first_msg_event_to_node(msg_node_id: &PublicKey, msg_events: &Vec<MessageSendEvent>) -> (MessageSendEvent, Vec<MessageSendEvent>) {
 581         let ev_index = msg_events.iter().position(|e| { match e {
 582                 MessageSendEvent::SendAcceptChannel { node_id, .. } => {
 583                         node_id == msg_node_id
 584                 },
 585                 MessageSendEvent::SendOpenChannel { node_id, .. } => {
 586                         node_id == msg_node_id
 587                 },
 588                 MessageSendEvent::SendFundingCreated { node_id, .. } => {
 589                         node_id == msg_node_id
 590                 },
 591                 MessageSendEvent::SendFundingSigned { node_id, .. } => {
 592                         node_id == msg_node_id
 593                 },
 594                 MessageSendEvent::SendChannelReady { node_id, .. } => {
 595                         node_id == msg_node_id
 596                 },
 597                 MessageSendEvent::SendAnnouncementSignatures { node_id, .. } => {
 598                         node_id == msg_node_id
 599                 },
 600                 MessageSendEvent::UpdateHTLCs { node_id, .. } => {
 601                         node_id == msg_node_id
 602                 },
 603                 MessageSendEvent::SendRevokeAndACK { node_id, .. } => {
 604                         node_id == msg_node_id
 605                 },
 606                 MessageSendEvent::SendClosingSigned { node_id, .. } => {
 607                         node_id == msg_node_id
 608                 },
 609                 MessageSendEvent::SendShutdown { node_id, .. } => {
 610                         node_id == msg_node_id
 611                 },
 612                 MessageSendEvent::SendChannelReestablish { node_id, .. } => {
 613                         node_id == msg_node_id
 614                 },
 615                 MessageSendEvent::SendChannelAnnouncement { node_id, .. } => {
 616                         node_id == msg_node_id
 617                 },
 618                 MessageSendEvent::BroadcastChannelAnnouncement { .. } => {
 619                         false
 620                 },
 621                 MessageSendEvent::BroadcastChannelUpdate { .. } => {
 622                         false
 623                 },
 624                 MessageSendEvent::SendChannelUpdate { node_id, .. } => {
 625                         node_id == msg_node_id
 626                 },
 627                 MessageSendEvent::HandleError { node_id, .. } => {
 628                         node_id == msg_node_id
 629                 },
 630                 MessageSendEvent::SendChannelRangeQuery { node_id, .. } => {
 631                         node_id == msg_node_id
 632                 },
 633                 MessageSendEvent::SendShortIdsQuery { node_id, .. } => {
 634                         node_id == msg_node_id
 635                 },
 636                 MessageSendEvent::SendReplyChannelRange { node_id, .. } => {
 637                         node_id == msg_node_id
 638                 },
 639                 MessageSendEvent::SendGossipTimestampFilter { node_id, .. } => {
 640                         node_id == msg_node_id
 641                 },
 642         }});
 643         if ev_index.is_some() {
 644                 let mut updated_msg_events = msg_events.to_vec();
 645                 let ev = updated_msg_events.remove(ev_index.unwrap());
 646                 (ev, updated_msg_events)
 647         } else {
 648                 panic!("Couldn't find any MessageSendEvent to the node!")
 649         }
 650 }
 651
 652 #[cfg(test)]
 653 macro_rules! get_channel_ref {
 654         ($node: expr, $counterparty_node: expr, $per_peer_state_lock: ident, $peer_state_lock: ident, $channel_id: expr) => {
 655                 {
 656                         $per_peer_state_lock = $node.node.per_peer_state.read().unwrap();
 657                         $peer_state_lock = $per_peer_state_lock.get(&$counterparty_node.node.get_our_node_id()).unwrap().lock().unwrap();
 658                         $peer_state_lock.channel_by_id.get_mut(&$channel_id).unwrap()
 659                 }
 660         }
 661 }
 662
 663 #[cfg(test)]
 664 macro_rules! get_feerate {
 665         ($node: expr, $counterparty_node: expr, $channel_id: expr) => {
 666                 {
 667                         let mut per_peer_state_lock;
 668                         let mut peer_state_lock;
 669                         let chan = get_channel_ref!($node, $counterparty_node, per_peer_state_lock, peer_state_lock, $channel_id);
 670                         chan.get_feerate()
 671                 }
 672         }
 673 }
 674
 675 #[cfg(test)]
 676 macro_rules! get_opt_anchors {
 677         ($node: expr, $counterparty_node: expr, $channel_id: expr) => {
 678                 {
 679                         let mut per_peer_state_lock;
 680                         let mut peer_state_lock;
 681                         let chan = get_channel_ref!($node, $counterparty_node, per_peer_state_lock, peer_state_lock, $channel_id);
 682                         chan.opt_anchors()
 683                 }
 684         }
 685 }
 686
 687 /// Returns a channel monitor given a channel id, making some naive assumptions
 688 #[macro_export]
 689 macro_rules! get_monitor {
 690         ($node: expr, $channel_id: expr) => {
 691                 {
 692                         use bitcoin::hashes::Hash;
 693                         let mut monitor = None;
 694                         // Assume funding vout is either 0 or 1 blindly
 695                         for index in 0..2 {
 696                                 if let Ok(mon) = $node.chain_monitor.chain_monitor.get_monitor(
 697                                         $crate::chain::transaction::OutPoint {
 698                                                 txid: bitcoin::Txid::from_slice(&$channel_id[..]).unwrap(), index
 699                                         })
 700                                 {
 701                                         monitor = Some(mon);
 702                                         break;
 703                                 }
 704                         }
 705                         monitor.unwrap()
 706                 }
 707         }
 708 }
 709
 710 /// Returns any local commitment transactions for the channel.
 711 #[macro_export]
 712 macro_rules! get_local_commitment_txn {
 713         ($node: expr, $channel_id: expr) => {
 714                 {
 715                         $crate::get_monitor!($node, $channel_id).unsafe_get_latest_holder_commitment_txn(&$node.logger)
 716                 }
 717         }
 718 }
 719
 720 /// Check the error from attempting a payment.
 721 #[macro_export]
 722 macro_rules! unwrap_send_err {
 723         ($res: expr, $all_failed: expr, $type: pat, $check: expr) => {
 724                 match &$res {
 725                         &Err(PaymentSendFailure::AllFailedResendSafe(ref fails)) if $all_failed => {
 726                                 assert_eq!(fails.len(), 1);
 727                                 match fails[0] {
 728                                         $type => { $check },
 729                                         _ => panic!(),
 730                                 }
 731                         },
 732                         &Err(PaymentSendFailure::PartialFailure { ref results, .. }) if !$all_failed => {
 733                                 assert_eq!(results.len(), 1);
 734                                 match results[0] {
 735                                         Err($type) => { $check },
 736                                         _ => panic!(),
 737                                 }
 738                         },
 739                         _ => panic!(),
 740                 }
 741         }
 742 }
 743
 744 /// Check whether N channel monitor(s) have been added.
 745 #[macro_export]
 746 macro_rules! check_added_monitors {
 747         ($node: expr, $count: expr) => {
 748                 {
 749                         let mut added_monitors = $node.chain_monitor.added_monitors.lock().unwrap();
 750                         assert_eq!(added_monitors.len(), $count);
 751                         added_monitors.clear();
 752                 }
 753         }
 754 }
 755
 756 pub fn _reload_node<'a, 'b, 'c, 'd>(node: &'a Node<'b, 'c, 'd>, default_config: UserConfig, chanman_encoded: &[u8], monitors_encoded: &[&[u8]]) -> ChannelManager<&'b TestChainMonitor<'c>, &'c test_utils::TestBroadcaster, &'b test_utils::TestKeysInterface, &'b test_utils::TestKeysInterface, &'b test_utils::TestKeysInterface, &'c test_utils::TestFeeEstimator, &'b test_utils::TestRouter<'c>, &'c test_utils::TestLogger> {
 757         let mut monitors_read = Vec::with_capacity(monitors_encoded.len());
 758         for encoded in monitors_encoded {
 759                 let mut monitor_read = &encoded[..];
 760                 let (_, monitor) = <(BlockHash, ChannelMonitor<EnforcingSigner>)>
 761                         ::read(&mut monitor_read, (node.keys_manager, node.keys_manager)).unwrap();
 762                 assert!(monitor_read.is_empty());
 763                 monitors_read.push(monitor);
 764         }
 765
 766         let mut node_read = &chanman_encoded[..];
 767         let (_, node_deserialized) = {
 768                 let mut channel_monitors = HashMap::new();
 769                 for monitor in monitors_read.iter_mut() {
 770                         assert!(channel_monitors.insert(monitor.get_funding_txo().0, monitor).is_none());
 771                 }
 772                 <(BlockHash, ChannelManager<&test_utils::TestChainMonitor, &test_utils::TestBroadcaster, &test_utils::TestKeysInterface, &test_utils::TestKeysInterface, &test_utils::TestKeysInterface, &test_utils::TestFeeEstimator, &test_utils::TestRouter, &test_utils::TestLogger>)>::read(&mut node_read, ChannelManagerReadArgs {
 773                         default_config,
 774                         entropy_source: node.keys_manager,
 775                         node_signer: node.keys_manager,
 776                         signer_provider: node.keys_manager,
 777                         fee_estimator: node.fee_estimator,
 778                         router: node.router,
 779                         chain_monitor: node.chain_monitor,
 780                         tx_broadcaster: node.tx_broadcaster,
 781                         logger: node.logger,
 782                         channel_monitors,
 783                 }).unwrap()
 784         };
 785         assert!(node_read.is_empty());
 786
 787         for monitor in monitors_read.drain(..) {
 788                 assert_eq!(node.chain_monitor.watch_channel(monitor.get_funding_txo().0, monitor),
 789                         ChannelMonitorUpdateStatus::Completed);
 790                 check_added_monitors!(node, 1);
 791         }
 792
 793         node_deserialized
 794 }
 795
 796 #[cfg(test)]
 797 macro_rules! reload_node {
 798         ($node: expr, $new_config: expr, $chanman_encoded: expr, $monitors_encoded: expr, $persister: ident, $new_chain_monitor: ident, $new_channelmanager: ident) => {
 799                 let chanman_encoded = $chanman_encoded;
 800
 801                 $persister = test_utils::TestPersister::new();
 802                 $new_chain_monitor = test_utils::TestChainMonitor::new(Some($node.chain_source), $node.tx_broadcaster.clone(), $node.logger, $node.fee_estimator, &$persister, &$node.keys_manager);
 803                 $node.chain_monitor = &$new_chain_monitor;
 804
 805                 $new_channelmanager = _reload_node(&$node, $new_config, &chanman_encoded, $monitors_encoded);
 806                 $node.node = &$new_channelmanager;
 807         };
 808         ($node: expr, $chanman_encoded: expr, $monitors_encoded: expr, $persister: ident, $new_chain_monitor: ident, $new_channelmanager: ident) => {
 809                 reload_node!($node, $crate::util::config::UserConfig::default(), $chanman_encoded, $monitors_encoded, $persister, $new_chain_monitor, $new_channelmanager);
 810         };
 811 }
 812
 813 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: u128) -> ([u8; 32], Transaction, OutPoint) {
 814         let chan_id = *node.network_chan_count.borrow();
 815
 816         let events = node.node.get_and_clear_pending_events();
 817         assert_eq!(events.len(), 1);
 818         match events[0] {
 819                 Event::FundingGenerationReady { ref temporary_channel_id, ref counterparty_node_id, ref channel_value_satoshis, ref output_script, user_channel_id } => {
 820                         assert_eq!(counterparty_node_id, expected_counterparty_node_id);
 821                         assert_eq!(*channel_value_satoshis, expected_chan_value);
 822                         assert_eq!(user_channel_id, expected_user_chan_id);
 823
 824                         let tx = Transaction { version: chan_id as i32, lock_time: PackedLockTime::ZERO, input: Vec::new(), output: vec![TxOut {
 825                                 value: *channel_value_satoshis, script_pubkey: output_script.clone(),
 826                         }]};
 827                         let funding_outpoint = OutPoint { txid: tx.txid(), index: 0 };
 828                         (*temporary_channel_id, tx, funding_outpoint)
 829                 },
 830                 _ => panic!("Unexpected event"),
 831         }
 832 }
 833 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 {
 834         let (temporary_channel_id, tx, funding_output) = create_funding_transaction(node_a, &node_b.node.get_our_node_id(), channel_value, 42);
 835         assert_eq!(temporary_channel_id, expected_temporary_channel_id);
 836
 837         assert!(node_a.node.funding_transaction_generated(&temporary_channel_id, &node_b.node.get_our_node_id(), tx.clone()).is_ok());
 838         check_added_monitors!(node_a, 0);
 839
 840         let funding_created_msg = get_event_msg!(node_a, MessageSendEvent::SendFundingCreated, node_b.node.get_our_node_id());
 841         assert_eq!(funding_created_msg.temporary_channel_id, expected_temporary_channel_id);
 842         node_b.node.handle_funding_created(&node_a.node.get_our_node_id(), &funding_created_msg);
 843         {
 844                 let mut added_monitors = node_b.chain_monitor.added_monitors.lock().unwrap();
 845                 assert_eq!(added_monitors.len(), 1);
 846                 assert_eq!(added_monitors[0].0, funding_output);
 847                 added_monitors.clear();
 848         }
 849
 850         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()));
 851         {
 852                 let mut added_monitors = node_a.chain_monitor.added_monitors.lock().unwrap();
 853                 assert_eq!(added_monitors.len(), 1);
 854                 assert_eq!(added_monitors[0].0, funding_output);
 855                 added_monitors.clear();
 856         }
 857
 858         let events_4 = node_a.node.get_and_clear_pending_events();
 859         assert_eq!(events_4.len(), 0);
 860
 861         assert_eq!(node_a.tx_broadcaster.txn_broadcasted.lock().unwrap().len(), 1);
 862         assert_eq!(node_a.tx_broadcaster.txn_broadcasted.lock().unwrap()[0], tx);
 863         node_a.tx_broadcaster.txn_broadcasted.lock().unwrap().clear();
 864
 865         // Ensure that funding_transaction_generated is idempotent.
 866         assert!(node_a.node.funding_transaction_generated(&temporary_channel_id, &node_b.node.get_our_node_id(), tx.clone()).is_err());
 867         assert!(node_a.node.get_and_clear_pending_msg_events().is_empty());
 868         check_added_monitors!(node_a, 0);
 869
 870         tx
 871 }
 872
 873 // Receiver must have been initialized with manually_accept_inbound_channels set to true.
 874 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]) {
 875         let initiator_channels = initiator.node.list_usable_channels().len();
 876         let receiver_channels = receiver.node.list_usable_channels().len();
 877
 878         initiator.node.create_channel(receiver.node.get_our_node_id(), 100_000, 10_001, 42, initiator_config).unwrap();
 879         let open_channel = get_event_msg!(initiator, MessageSendEvent::SendOpenChannel, receiver.node.get_our_node_id());
 880
 881         receiver.node.handle_open_channel(&initiator.node.get_our_node_id(), &open_channel);
 882         let events = receiver.node.get_and_clear_pending_events();
 883         assert_eq!(events.len(), 1);
 884         match events[0] {
 885                 Event::OpenChannelRequest { temporary_channel_id, .. } => {
 886                         receiver.node.accept_inbound_channel_from_trusted_peer_0conf(&temporary_channel_id, &initiator.node.get_our_node_id(), 0).unwrap();
 887                 },
 888                 _ => panic!("Unexpected event"),
 889         };
 890
 891         let accept_channel = get_event_msg!(receiver, MessageSendEvent::SendAcceptChannel, initiator.node.get_our_node_id());
 892         assert_eq!(accept_channel.minimum_depth, 0);
 893         initiator.node.handle_accept_channel(&receiver.node.get_our_node_id(), &accept_channel);
 894
 895         let (temporary_channel_id, tx, _) = create_funding_transaction(&initiator, &receiver.node.get_our_node_id(), 100_000, 42);
 896         initiator.node.funding_transaction_generated(&temporary_channel_id, &receiver.node.get_our_node_id(), tx.clone()).unwrap();
 897         let funding_created = get_event_msg!(initiator, MessageSendEvent::SendFundingCreated, receiver.node.get_our_node_id());
 898
 899         receiver.node.handle_funding_created(&initiator.node.get_our_node_id(), &funding_created);
 900         check_added_monitors!(receiver, 1);
 901         let bs_signed_locked = receiver.node.get_and_clear_pending_msg_events();
 902         assert_eq!(bs_signed_locked.len(), 2);
 903         let as_channel_ready;
 904         match &bs_signed_locked[0] {
 905                 MessageSendEvent::SendFundingSigned { node_id, msg } => {
 906                         assert_eq!(*node_id, initiator.node.get_our_node_id());
 907                         initiator.node.handle_funding_signed(&receiver.node.get_our_node_id(), &msg);
 908                         check_added_monitors!(initiator, 1);
 909
 910                         assert_eq!(initiator.tx_broadcaster.txn_broadcasted.lock().unwrap().len(), 1);
 911                         assert_eq!(initiator.tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0)[0], tx);
 912
 913                         as_channel_ready = get_event_msg!(initiator, MessageSendEvent::SendChannelReady, receiver.node.get_our_node_id());
 914                 }
 915                 _ => panic!("Unexpected event"),
 916         }
 917         match &bs_signed_locked[1] {
 918                 MessageSendEvent::SendChannelReady { node_id, msg } => {
 919                         assert_eq!(*node_id, initiator.node.get_our_node_id());
 920                         initiator.node.handle_channel_ready(&receiver.node.get_our_node_id(), &msg);
 921                 }
 922                 _ => panic!("Unexpected event"),
 923         }
 924
 925         receiver.node.handle_channel_ready(&initiator.node.get_our_node_id(), &as_channel_ready);
 926
 927         let as_channel_update = get_event_msg!(initiator, MessageSendEvent::SendChannelUpdate, receiver.node.get_our_node_id());
 928         let bs_channel_update = get_event_msg!(receiver, MessageSendEvent::SendChannelUpdate, initiator.node.get_our_node_id());
 929
 930         initiator.node.handle_channel_update(&receiver.node.get_our_node_id(), &bs_channel_update);
 931         receiver.node.handle_channel_update(&initiator.node.get_our_node_id(), &as_channel_update);
 932
 933         assert_eq!(initiator.node.list_usable_channels().len(), initiator_channels + 1);
 934         assert_eq!(receiver.node.list_usable_channels().len(), receiver_channels + 1);
 935
 936         expect_channel_ready_event(&initiator, &receiver.node.get_our_node_id());
 937         expect_channel_ready_event(&receiver, &initiator.node.get_our_node_id());
 938
 939         (tx, as_channel_ready.channel_id)
 940 }
 941
 942 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) -> Transaction {
 943         let create_chan_id = node_a.node.create_channel(node_b.node.get_our_node_id(), channel_value, push_msat, 42, None).unwrap();
 944         let open_channel_msg = get_event_msg!(node_a, MessageSendEvent::SendOpenChannel, node_b.node.get_our_node_id());
 945         assert_eq!(open_channel_msg.temporary_channel_id, create_chan_id);
 946         assert_eq!(node_a.node.list_channels().iter().find(|channel| channel.channel_id == create_chan_id).unwrap().user_channel_id, 42);
 947         node_b.node.handle_open_channel(&node_a.node.get_our_node_id(), &open_channel_msg);
 948         let accept_channel_msg = get_event_msg!(node_b, MessageSendEvent::SendAcceptChannel, node_a.node.get_our_node_id());
 949         assert_eq!(accept_channel_msg.temporary_channel_id, create_chan_id);
 950         node_a.node.handle_accept_channel(&node_b.node.get_our_node_id(), &accept_channel_msg);
 951         assert_ne!(node_b.node.list_channels().iter().find(|channel| channel.channel_id == create_chan_id).unwrap().user_channel_id, 0);
 952
 953         sign_funding_transaction(node_a, node_b, channel_value, create_chan_id)
 954 }
 955
 956 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) {
 957         confirm_transaction_at(node_conf, tx, conf_height);
 958         connect_blocks(node_conf, CHAN_CONFIRM_DEPTH - 1);
 959         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()));
 960 }
 961
 962 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]) {
 963         let channel_id;
 964         let events_6 = node_conf.node.get_and_clear_pending_msg_events();
 965         assert_eq!(events_6.len(), 3);
 966         let announcement_sigs_idx = if let MessageSendEvent::SendChannelUpdate { ref node_id, msg: _ } = events_6[1] {
 967                 assert_eq!(*node_id, node_recv.node.get_our_node_id());
 968                 2
 969         } else if let MessageSendEvent::SendChannelUpdate { ref node_id, msg: _ } = events_6[2] {
 970                 assert_eq!(*node_id, node_recv.node.get_our_node_id());
 971                 1
 972         } else { panic!("Unexpected event: {:?}", events_6[1]); };
 973         ((match events_6[0] {
 974                 MessageSendEvent::SendChannelReady { ref node_id, ref msg } => {
 975                         channel_id = msg.channel_id.clone();
 976                         assert_eq!(*node_id, node_recv.node.get_our_node_id());
 977                         msg.clone()
 978                 },
 979                 _ => panic!("Unexpected event"),
 980         }, match events_6[announcement_sigs_idx] {
 981                 MessageSendEvent::SendAnnouncementSignatures { ref node_id, ref msg } => {
 982                         assert_eq!(*node_id, node_recv.node.get_our_node_id());
 983                         msg.clone()
 984                 },
 985                 _ => panic!("Unexpected event"),
 986         }), channel_id)
 987 }
 988
 989 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]) {
 990         let conf_height = core::cmp::max(node_a.best_block_info().1 + 1, node_b.best_block_info().1 + 1);
 991         create_chan_between_nodes_with_value_confirm_first(node_a, node_b, tx, conf_height);
 992         confirm_transaction_at(node_a, tx, conf_height);
 993         connect_blocks(node_a, CHAN_CONFIRM_DEPTH - 1);
 994         expect_channel_ready_event(&node_a, &node_b.node.get_our_node_id());
 995         create_chan_between_nodes_with_value_confirm_second(node_b, node_a)
 996 }
 997
 998 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) -> ((msgs::ChannelReady, msgs::AnnouncementSignatures), [u8; 32], Transaction) {
 999         let tx = create_chan_between_nodes_with_value_init(node_a, node_b, channel_value, push_msat);
1000         let (msgs, chan_id) = create_chan_between_nodes_with_value_confirm(node_a, node_b, &tx);
1001         (msgs, chan_id, tx)
1002 }
1003
1004 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) {
1005         node_b.node.handle_channel_ready(&node_a.node.get_our_node_id(), &as_funding_msgs.0);
1006         let bs_announcement_sigs = get_event_msg!(node_b, MessageSendEvent::SendAnnouncementSignatures, node_a.node.get_our_node_id());
1007         node_b.node.handle_announcement_signatures(&node_a.node.get_our_node_id(), &as_funding_msgs.1);
1008
1009         let events_7 = node_b.node.get_and_clear_pending_msg_events();
1010         assert_eq!(events_7.len(), 1);
1011         let (announcement, bs_update) = match events_7[0] {
1012                 MessageSendEvent::BroadcastChannelAnnouncement { ref msg, ref update_msg } => {
1013                         (msg, update_msg)
1014                 },
1015                 _ => panic!("Unexpected event"),
1016         };
1017
1018         node_a.node.handle_announcement_signatures(&node_b.node.get_our_node_id(), &bs_announcement_sigs);
1019         let events_8 = node_a.node.get_and_clear_pending_msg_events();
1020         assert_eq!(events_8.len(), 1);
1021         let as_update = match events_8[0] {
1022                 MessageSendEvent::BroadcastChannelAnnouncement { ref msg, ref update_msg } => {
1023                         assert!(*announcement == *msg);
1024                         assert_eq!(update_msg.contents.short_channel_id, announcement.contents.short_channel_id);
1025                         assert_eq!(update_msg.contents.short_channel_id, bs_update.contents.short_channel_id);
1026                         update_msg
1027                 },
1028                 _ => panic!("Unexpected event"),
1029         };
1030
1031         *node_a.network_chan_count.borrow_mut() += 1;
1032
1033         expect_channel_ready_event(&node_b, &node_a.node.get_our_node_id());
1034         ((*announcement).clone(), (*as_update).clone(), (*bs_update).clone())
1035 }
1036
1037 pub fn create_announced_chan_between_nodes<'a, 'b, 'c, 'd>(nodes: &'a Vec<Node<'b, 'c, 'd>>, a: usize, b: usize) -> (msgs::ChannelUpdate, msgs::ChannelUpdate, [u8; 32], Transaction) {
1038         create_announced_chan_between_nodes_with_value(nodes, a, b, 100000, 10001)
1039 }
1040
1041 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) -> (msgs::ChannelUpdate, msgs::ChannelUpdate, [u8; 32], Transaction) {
1042         let chan_announcement = create_chan_between_nodes_with_value(&nodes[a], &nodes[b], channel_value, push_msat);
1043         update_nodes_with_chan_announce(nodes, a, b, &chan_announcement.0, &chan_announcement.1, &chan_announcement.2);
1044         (chan_announcement.1, chan_announcement.2, chan_announcement.3, chan_announcement.4)
1045 }
1046
1047 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) -> (msgs::ChannelReady, Transaction) {
1048         let mut no_announce_cfg = test_default_channel_config();
1049         no_announce_cfg.channel_handshake_config.announced_channel = false;
1050         nodes[a].node.create_channel(nodes[b].node.get_our_node_id(), channel_value, push_msat, 42, Some(no_announce_cfg)).unwrap();
1051         let open_channel = get_event_msg!(nodes[a], MessageSendEvent::SendOpenChannel, nodes[b].node.get_our_node_id());
1052         nodes[b].node.handle_open_channel(&nodes[a].node.get_our_node_id(), &open_channel);
1053         let accept_channel = get_event_msg!(nodes[b], MessageSendEvent::SendAcceptChannel, nodes[a].node.get_our_node_id());
1054         nodes[a].node.handle_accept_channel(&nodes[b].node.get_our_node_id(), &accept_channel);
1055
1056         let (temporary_channel_id, tx, _) = create_funding_transaction(&nodes[a], &nodes[b].node.get_our_node_id(), channel_value, 42);
1057         nodes[a].node.funding_transaction_generated(&temporary_channel_id, &nodes[b].node.get_our_node_id(), tx.clone()).unwrap();
1058         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()));
1059         check_added_monitors!(nodes[b], 1);
1060
1061         let cs_funding_signed = get_event_msg!(nodes[b], MessageSendEvent::SendFundingSigned, nodes[a].node.get_our_node_id());
1062         nodes[a].node.handle_funding_signed(&nodes[b].node.get_our_node_id(), &cs_funding_signed);
1063         check_added_monitors!(nodes[a], 1);
1064
1065         let conf_height = core::cmp::max(nodes[a].best_block_info().1 + 1, nodes[b].best_block_info().1 + 1);
1066         confirm_transaction_at(&nodes[a], &tx, conf_height);
1067         connect_blocks(&nodes[a], CHAN_CONFIRM_DEPTH - 1);
1068         confirm_transaction_at(&nodes[b], &tx, conf_height);
1069         connect_blocks(&nodes[b], CHAN_CONFIRM_DEPTH - 1);
1070         let as_channel_ready = get_event_msg!(nodes[a], MessageSendEvent::SendChannelReady, nodes[b].node.get_our_node_id());
1071         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()));
1072         expect_channel_ready_event(&nodes[a], &nodes[b].node.get_our_node_id());
1073         let as_update = get_event_msg!(nodes[a], MessageSendEvent::SendChannelUpdate, nodes[b].node.get_our_node_id());
1074         nodes[b].node.handle_channel_ready(&nodes[a].node.get_our_node_id(), &as_channel_ready);
1075         expect_channel_ready_event(&nodes[b], &nodes[a].node.get_our_node_id());
1076         let bs_update = get_event_msg!(nodes[b], MessageSendEvent::SendChannelUpdate, nodes[a].node.get_our_node_id());
1077
1078         nodes[a].node.handle_channel_update(&nodes[b].node.get_our_node_id(), &bs_update);
1079         nodes[b].node.handle_channel_update(&nodes[a].node.get_our_node_id(), &as_update);
1080
1081         let mut found_a = false;
1082         for chan in nodes[a].node.list_usable_channels() {
1083                 if chan.channel_id == as_channel_ready.channel_id {
1084                         assert!(!found_a);
1085                         found_a = true;
1086                         assert!(!chan.is_public);
1087                 }
1088         }
1089         assert!(found_a);
1090
1091         let mut found_b = false;
1092         for chan in nodes[b].node.list_usable_channels() {
1093                 if chan.channel_id == as_channel_ready.channel_id {
1094                         assert!(!found_b);
1095                         found_b = true;
1096                         assert!(!chan.is_public);
1097                 }
1098         }
1099         assert!(found_b);
1100
1101         (as_channel_ready, tx)
1102 }
1103
1104 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) {
1105         for node in nodes {
1106                 assert!(node.gossip_sync.handle_channel_announcement(ann).unwrap());
1107                 node.gossip_sync.handle_channel_update(upd_1).unwrap();
1108                 node.gossip_sync.handle_channel_update(upd_2).unwrap();
1109
1110                 // Note that channel_updates are also delivered to ChannelManagers to ensure we have
1111                 // forwarding info for local channels even if its not accepted in the network graph.
1112                 node.node.handle_channel_update(&nodes[a].node.get_our_node_id(), &upd_1);
1113                 node.node.handle_channel_update(&nodes[b].node.get_our_node_id(), &upd_2);
1114         }
1115 }
1116
1117 #[macro_export]
1118 macro_rules! check_spends {
1119         ($tx: expr, $($spends_txn: expr),*) => {
1120                 {
1121                         $(
1122                         for outp in $spends_txn.output.iter() {
1123                                 assert!(outp.value >= outp.script_pubkey.dust_value().to_sat(), "Input tx output didn't meet dust limit");
1124                         }
1125                         )*
1126                         for outp in $tx.output.iter() {
1127                                 assert!(outp.value >= outp.script_pubkey.dust_value().to_sat(), "Spending tx output didn't meet dust limit");
1128                         }
1129                         let get_output = |out_point: &bitcoin::blockdata::transaction::OutPoint| {
1130                                 $(
1131                                         if out_point.txid == $spends_txn.txid() {
1132                                                 return $spends_txn.output.get(out_point.vout as usize).cloned()
1133                                         }
1134                                 )*
1135                                 None
1136                         };
1137                         let mut total_value_in = 0;
1138                         for input in $tx.input.iter() {
1139                                 total_value_in += get_output(&input.previous_output).unwrap().value;
1140                         }
1141                         let mut total_value_out = 0;
1142                         for output in $tx.output.iter() {
1143                                 total_value_out += output.value;
1144                         }
1145                         let min_fee = ($tx.weight() as u64 + 3) / 4; // One sat per vbyte (ie per weight/4, rounded up)
1146                         // Input amount - output amount = fee, so check that out + min_fee is smaller than input
1147                         assert!(total_value_out + min_fee <= total_value_in);
1148                         $tx.verify(get_output).unwrap();
1149                 }
1150         }
1151 }
1152
1153 macro_rules! get_closing_signed_broadcast {
1154         ($node: expr, $dest_pubkey: expr) => {
1155                 {
1156                         let events = $node.get_and_clear_pending_msg_events();
1157                         assert!(events.len() == 1 || events.len() == 2);
1158                         (match events[events.len() - 1] {
1159                                 MessageSendEvent::BroadcastChannelUpdate { ref msg } => {
1160                                         assert_eq!(msg.contents.flags & 2, 2);
1161                                         msg.clone()
1162                                 },
1163                                 _ => panic!("Unexpected event"),
1164                         }, if events.len() == 2 {
1165                                 match events[0] {
1166                                         MessageSendEvent::SendClosingSigned { ref node_id, ref msg } => {
1167                                                 assert_eq!(*node_id, $dest_pubkey);
1168                                                 Some(msg.clone())
1169                                         },
1170                                         _ => panic!("Unexpected event"),
1171                                 }
1172                         } else { None })
1173                 }
1174         }
1175 }
1176
1177 #[cfg(test)]
1178 macro_rules! check_warn_msg {
1179         ($node: expr, $recipient_node_id: expr, $chan_id: expr) => {{
1180                 let msg_events = $node.node.get_and_clear_pending_msg_events();
1181                 assert_eq!(msg_events.len(), 1);
1182                 match msg_events[0] {
1183                         MessageSendEvent::HandleError { action: ErrorAction::SendWarningMessage { ref msg, log_level: _ }, node_id } => {
1184                                 assert_eq!(node_id, $recipient_node_id);
1185                                 assert_eq!(msg.channel_id, $chan_id);
1186                                 msg.data.clone()
1187                         },
1188                         _ => panic!("Unexpected event"),
1189                 }
1190         }}
1191 }
1192
1193 /// Check that a channel's closing channel update has been broadcasted, and optionally
1194 /// check whether an error message event has occurred.
1195 #[macro_export]
1196 macro_rules! check_closed_broadcast {
1197         ($node: expr, $with_error_msg: expr) => {{
1198                 use $crate::util::events::MessageSendEvent;
1199                 use $crate::ln::msgs::ErrorAction;
1200
1201                 let msg_events = $node.node.get_and_clear_pending_msg_events();
1202                 assert_eq!(msg_events.len(), if $with_error_msg { 2 } else { 1 });
1203                 match msg_events[0] {
1204                         MessageSendEvent::BroadcastChannelUpdate { ref msg } => {
1205                                 assert_eq!(msg.contents.flags & 2, 2);
1206                         },
1207                         _ => panic!("Unexpected event"),
1208                 }
1209                 if $with_error_msg {
1210                         match msg_events[1] {
1211                                 MessageSendEvent::HandleError { action: ErrorAction::SendErrorMessage { ref msg }, node_id: _ } => {
1212                                         // TODO: Check node_id
1213                                         Some(msg.clone())
1214                                 },
1215                                 _ => panic!("Unexpected event"),
1216                         }
1217                 } else { None }
1218         }}
1219 }
1220
1221 /// Check that a channel's closing channel events has been issued
1222 #[macro_export]
1223 macro_rules! check_closed_event {
1224         ($node: expr, $events: expr, $reason: expr) => {
1225                 check_closed_event!($node, $events, $reason, false);
1226         };
1227         ($node: expr, $events: expr, $reason: expr, $is_check_discard_funding: expr) => {{
1228                 use $crate::util::events::Event;
1229
1230                 let events = $node.node.get_and_clear_pending_events();
1231                 assert_eq!(events.len(), $events, "{:?}", events);
1232                 let expected_reason = $reason;
1233                 let mut issues_discard_funding = false;
1234                 for event in events {
1235                         match event {
1236                                 Event::ChannelClosed { ref reason, .. } => {
1237                                         assert_eq!(*reason, expected_reason);
1238                                 },
1239                                 Event::DiscardFunding { .. } => {
1240                                         issues_discard_funding = true;
1241                                 }
1242                                 _ => panic!("Unexpected event"),
1243                         }
1244                 }
1245                 assert_eq!($is_check_discard_funding, issues_discard_funding);
1246         }}
1247 }
1248
1249 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) {
1250         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) };
1251         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) };
1252         let (tx_a, tx_b);
1253
1254         node_a.close_channel(channel_id, &node_b.get_our_node_id()).unwrap();
1255         node_b.handle_shutdown(&node_a.get_our_node_id(), &get_event_msg!(struct_a, MessageSendEvent::SendShutdown, node_b.get_our_node_id()));
1256
1257         let events_1 = node_b.get_and_clear_pending_msg_events();
1258         assert!(events_1.len() >= 1);
1259         let shutdown_b = match events_1[0] {
1260                 MessageSendEvent::SendShutdown { ref node_id, ref msg } => {
1261                         assert_eq!(node_id, &node_a.get_our_node_id());
1262                         msg.clone()
1263                 },
1264                 _ => panic!("Unexpected event"),
1265         };
1266
1267         let closing_signed_b = if !close_inbound_first {
1268                 assert_eq!(events_1.len(), 1);
1269                 None
1270         } else {
1271                 Some(match events_1[1] {
1272                         MessageSendEvent::SendClosingSigned { ref node_id, ref msg } => {
1273                                 assert_eq!(node_id, &node_a.get_our_node_id());
1274                                 msg.clone()
1275                         },
1276                         _ => panic!("Unexpected event"),
1277                 })
1278         };
1279
1280         node_a.handle_shutdown(&node_b.get_our_node_id(), &shutdown_b);
1281         let (as_update, bs_update) = if close_inbound_first {
1282                 assert!(node_a.get_and_clear_pending_msg_events().is_empty());
1283                 node_a.handle_closing_signed(&node_b.get_our_node_id(), &closing_signed_b.unwrap());
1284
1285                 node_b.handle_closing_signed(&node_a.get_our_node_id(), &get_event_msg!(struct_a, MessageSendEvent::SendClosingSigned, node_b.get_our_node_id()));
1286                 assert_eq!(broadcaster_b.txn_broadcasted.lock().unwrap().len(), 1);
1287                 tx_b = broadcaster_b.txn_broadcasted.lock().unwrap().remove(0);
1288                 let (bs_update, closing_signed_b) = get_closing_signed_broadcast!(node_b, node_a.get_our_node_id());
1289
1290                 node_a.handle_closing_signed(&node_b.get_our_node_id(), &closing_signed_b.unwrap());
1291                 let (as_update, none_a) = get_closing_signed_broadcast!(node_a, node_b.get_our_node_id());
1292                 assert!(none_a.is_none());
1293                 assert_eq!(broadcaster_a.txn_broadcasted.lock().unwrap().len(), 1);
1294                 tx_a = broadcaster_a.txn_broadcasted.lock().unwrap().remove(0);
1295                 (as_update, bs_update)
1296         } else {
1297                 let closing_signed_a = get_event_msg!(struct_a, MessageSendEvent::SendClosingSigned, node_b.get_our_node_id());
1298
1299                 node_b.handle_closing_signed(&node_a.get_our_node_id(), &closing_signed_a);
1300                 node_a.handle_closing_signed(&node_b.get_our_node_id(), &get_event_msg!(struct_b, MessageSendEvent::SendClosingSigned, node_a.get_our_node_id()));
1301
1302                 assert_eq!(broadcaster_a.txn_broadcasted.lock().unwrap().len(), 1);
1303                 tx_a = broadcaster_a.txn_broadcasted.lock().unwrap().remove(0);
1304                 let (as_update, closing_signed_a) = get_closing_signed_broadcast!(node_a, node_b.get_our_node_id());
1305
1306                 node_b.handle_closing_signed(&node_a.get_our_node_id(), &closing_signed_a.unwrap());
1307                 let (bs_update, none_b) = get_closing_signed_broadcast!(node_b, node_a.get_our_node_id());
1308                 assert!(none_b.is_none());
1309                 assert_eq!(broadcaster_b.txn_broadcasted.lock().unwrap().len(), 1);
1310                 tx_b = broadcaster_b.txn_broadcasted.lock().unwrap().remove(0);
1311                 (as_update, bs_update)
1312         };
1313         assert_eq!(tx_a, tx_b);
1314         check_spends!(tx_a, funding_tx);
1315
1316         (as_update, bs_update, tx_a)
1317 }
1318
1319 pub struct SendEvent {
1320         pub node_id: PublicKey,
1321         pub msgs: Vec<msgs::UpdateAddHTLC>,
1322         pub commitment_msg: msgs::CommitmentSigned,
1323 }
1324 impl SendEvent {
1325         pub fn from_commitment_update(node_id: PublicKey, updates: msgs::CommitmentUpdate) -> SendEvent {
1326                 assert!(updates.update_fulfill_htlcs.is_empty());
1327                 assert!(updates.update_fail_htlcs.is_empty());
1328                 assert!(updates.update_fail_malformed_htlcs.is_empty());
1329                 assert!(updates.update_fee.is_none());
1330                 SendEvent { node_id, msgs: updates.update_add_htlcs, commitment_msg: updates.commitment_signed }
1331         }
1332
1333         pub fn from_event(event: MessageSendEvent) -> SendEvent {
1334                 match event {
1335                         MessageSendEvent::UpdateHTLCs { node_id, updates } => SendEvent::from_commitment_update(node_id, updates),
1336                         _ => panic!("Unexpected event type!"),
1337                 }
1338         }
1339
1340         pub fn from_node<'a, 'b, 'c>(node: &Node<'a, 'b, 'c>) -> SendEvent {
1341                 let mut events = node.node.get_and_clear_pending_msg_events();
1342                 assert_eq!(events.len(), 1);
1343                 SendEvent::from_event(events.pop().unwrap())
1344         }
1345 }
1346
1347 #[macro_export]
1348 /// Performs the "commitment signed dance" - the series of message exchanges which occur after a
1349 /// commitment update.
1350 macro_rules! commitment_signed_dance {
1351         ($node_a: expr, $node_b: expr, $commitment_signed: expr, $fail_backwards: expr, true /* skip last step */) => {
1352                 {
1353                         check_added_monitors!($node_a, 0);
1354                         assert!($node_a.node.get_and_clear_pending_msg_events().is_empty());
1355                         $node_a.node.handle_commitment_signed(&$node_b.node.get_our_node_id(), &$commitment_signed);
1356                         check_added_monitors!($node_a, 1);
1357                         commitment_signed_dance!($node_a, $node_b, (), $fail_backwards, true, false);
1358                 }
1359         };
1360         ($node_a: expr, $node_b: expr, (), $fail_backwards: expr, true /* skip last step */, true /* return extra message */, true /* return last RAA */) => {
1361                 {
1362                         let (as_revoke_and_ack, as_commitment_signed) = get_revoke_commit_msgs!($node_a, $node_b.node.get_our_node_id());
1363                         check_added_monitors!($node_b, 0);
1364                         assert!($node_b.node.get_and_clear_pending_msg_events().is_empty());
1365                         $node_b.node.handle_revoke_and_ack(&$node_a.node.get_our_node_id(), &as_revoke_and_ack);
1366                         assert!($node_b.node.get_and_clear_pending_msg_events().is_empty());
1367                         check_added_monitors!($node_b, 1);
1368                         $node_b.node.handle_commitment_signed(&$node_a.node.get_our_node_id(), &as_commitment_signed);
1369                         let (bs_revoke_and_ack, extra_msg_option) = {
1370                                 let events = $node_b.node.get_and_clear_pending_msg_events();
1371                                 assert!(events.len() <= 2);
1372                                 let (node_a_event, events) = remove_first_msg_event_to_node(&$node_a.node.get_our_node_id(), &events);
1373                                 (match node_a_event {
1374                                         MessageSendEvent::SendRevokeAndACK { ref node_id, ref msg } => {
1375                                                 assert_eq!(*node_id, $node_a.node.get_our_node_id());
1376                                                 (*msg).clone()
1377                                         },
1378                                         _ => panic!("Unexpected event"),
1379                                 }, events.get(0).map(|e| e.clone()))
1380                         };
1381                         check_added_monitors!($node_b, 1);
1382                         if $fail_backwards {
1383                                 assert!($node_a.node.get_and_clear_pending_events().is_empty());
1384                                 assert!($node_a.node.get_and_clear_pending_msg_events().is_empty());
1385                         }
1386                         (extra_msg_option, bs_revoke_and_ack)
1387                 }
1388         };
1389         ($node_a: expr, $node_b: expr, $commitment_signed: expr, $fail_backwards: expr, true /* skip last step */, false /* return extra message */, true /* return last RAA */) => {
1390                 {
1391                         check_added_monitors!($node_a, 0);
1392                         assert!($node_a.node.get_and_clear_pending_msg_events().is_empty());
1393                         $node_a.node.handle_commitment_signed(&$node_b.node.get_our_node_id(), &$commitment_signed);
1394                         check_added_monitors!($node_a, 1);
1395                         let (extra_msg_option, bs_revoke_and_ack) = commitment_signed_dance!($node_a, $node_b, (), $fail_backwards, true, true, true);
1396                         assert!(extra_msg_option.is_none());
1397                         bs_revoke_and_ack
1398                 }
1399         };
1400         ($node_a: expr, $node_b: expr, (), $fail_backwards: expr, true /* skip last step */, true /* return extra message */) => {
1401                 {
1402                         let (extra_msg_option, bs_revoke_and_ack) = commitment_signed_dance!($node_a, $node_b, (), $fail_backwards, true, true, true);
1403                         $node_a.node.handle_revoke_and_ack(&$node_b.node.get_our_node_id(), &bs_revoke_and_ack);
1404                         check_added_monitors!($node_a, 1);
1405                         extra_msg_option
1406                 }
1407         };
1408         ($node_a: expr, $node_b: expr, (), $fail_backwards: expr, true /* skip last step */, false /* no extra message */) => {
1409                 {
1410                         assert!(commitment_signed_dance!($node_a, $node_b, (), $fail_backwards, true, true).is_none());
1411                 }
1412         };
1413         ($node_a: expr, $node_b: expr, $commitment_signed: expr, $fail_backwards: expr) => {
1414                 {
1415                         commitment_signed_dance!($node_a, $node_b, $commitment_signed, $fail_backwards, true);
1416                         if $fail_backwards {
1417                                 expect_pending_htlcs_forwardable_and_htlc_handling_failed!($node_a, vec![$crate::util::events::HTLCDestination::NextHopChannel{ node_id: Some($node_b.node.get_our_node_id()), channel_id: $commitment_signed.channel_id }]);
1418                                 check_added_monitors!($node_a, 1);
1419
1420                                 let node_a_per_peer_state = $node_a.node.per_peer_state.read().unwrap();
1421                                 let mut number_of_msg_events = 0;
1422                                 for (cp_id, peer_state_mutex) in node_a_per_peer_state.iter() {
1423                                         let peer_state = peer_state_mutex.lock().unwrap();
1424                                         let cp_pending_msg_events = &peer_state.pending_msg_events;
1425                                         number_of_msg_events += cp_pending_msg_events.len();
1426                                         if cp_pending_msg_events.len() == 1 {
1427                                                 if let MessageSendEvent::UpdateHTLCs { .. } = cp_pending_msg_events[0] {
1428                                                         assert_ne!(*cp_id, $node_b.node.get_our_node_id());
1429                                                 } else { panic!("Unexpected event"); }
1430                                         }
1431                                 }
1432                                 // Expecting the failure backwards event to the previous hop (not `node_b`)
1433                                 assert_eq!(number_of_msg_events, 1);
1434                         } else {
1435                                 assert!($node_a.node.get_and_clear_pending_msg_events().is_empty());
1436                         }
1437                 }
1438         }
1439 }
1440
1441 /// Get a payment preimage and hash.
1442 #[macro_export]
1443 macro_rules! get_payment_preimage_hash {
1444         ($dest_node: expr) => {
1445                 {
1446                         get_payment_preimage_hash!($dest_node, None)
1447                 }
1448         };
1449         ($dest_node: expr, $min_value_msat: expr) => {
1450                 {
1451                         crate::get_payment_preimage_hash!($dest_node, $min_value_msat, None)
1452                 }
1453         };
1454         ($dest_node: expr, $min_value_msat: expr, $min_final_cltv_expiry_delta: expr) => {
1455                 {
1456                         use bitcoin::hashes::Hash as _;
1457                         let mut payment_count = $dest_node.network_payment_count.borrow_mut();
1458                         let payment_preimage = $crate::ln::PaymentPreimage([*payment_count; 32]);
1459                         *payment_count += 1;
1460                         let payment_hash = $crate::ln::PaymentHash(
1461                                 bitcoin::hashes::sha256::Hash::hash(&payment_preimage.0[..]).into_inner());
1462                         let payment_secret = $dest_node.node.create_inbound_payment_for_hash(payment_hash, $min_value_msat, 7200, $min_final_cltv_expiry_delta).unwrap();
1463                         (payment_preimage, payment_hash, payment_secret)
1464                 }
1465         };
1466 }
1467
1468 #[macro_export]
1469 macro_rules! get_route {
1470         ($send_node: expr, $payment_params: expr, $recv_value: expr, $cltv: expr) => {{
1471                 use $crate::chain::keysinterface::EntropySource;
1472                 let scorer = $crate::util::test_utils::TestScorer::with_penalty(0);
1473                 let keys_manager = $crate::util::test_utils::TestKeysInterface::new(&[0u8; 32], bitcoin::network::constants::Network::Testnet);
1474                 let random_seed_bytes = keys_manager.get_secure_random_bytes();
1475                 $crate::routing::router::get_route(
1476                         &$send_node.node.get_our_node_id(), &$payment_params, &$send_node.network_graph.read_only(),
1477                         Some(&$send_node.node.list_usable_channels().iter().collect::<Vec<_>>()),
1478                         $recv_value, $cltv, $send_node.logger, &scorer, &random_seed_bytes
1479                 )
1480         }}
1481 }
1482
1483 #[cfg(test)]
1484 #[macro_export]
1485 macro_rules! get_route_and_payment_hash {
1486         ($send_node: expr, $recv_node: expr, $recv_value: expr) => {{
1487                 let payment_params = $crate::routing::router::PaymentParameters::from_node_id($recv_node.node.get_our_node_id(), TEST_FINAL_CLTV)
1488                         .with_features($recv_node.node.invoice_features());
1489                 $crate::get_route_and_payment_hash!($send_node, $recv_node, payment_params, $recv_value, TEST_FINAL_CLTV)
1490         }};
1491         ($send_node: expr, $recv_node: expr, $payment_params: expr, $recv_value: expr, $cltv: expr) => {{
1492                 let (payment_preimage, payment_hash, payment_secret) = $crate::get_payment_preimage_hash!($recv_node, Some($recv_value));
1493                 let route = $crate::get_route!($send_node, $payment_params, $recv_value, $cltv);
1494                 (route.unwrap(), payment_hash, payment_preimage, payment_secret)
1495         }}
1496 }
1497
1498 #[macro_export]
1499 macro_rules! expect_pending_htlcs_forwardable_conditions {
1500         ($node: expr, $expected_failures: expr) => {{
1501                 let expected_failures = $expected_failures;
1502                 let events = $node.node.get_and_clear_pending_events();
1503                 match events[0] {
1504                         $crate::util::events::Event::PendingHTLCsForwardable { .. } => { },
1505                         _ => panic!("Unexpected event {:?}", events),
1506                 };
1507
1508                 let count = expected_failures.len() + 1;
1509                 assert_eq!(events.len(), count);
1510
1511                 if expected_failures.len() > 0 {
1512                         expect_htlc_handling_failed_destinations!(events, expected_failures)
1513                 }
1514         }}
1515 }
1516
1517 #[macro_export]
1518 macro_rules! expect_htlc_handling_failed_destinations {
1519         ($events: expr, $expected_failures: expr) => {{
1520                 for event in $events {
1521                         match event {
1522                                 $crate::util::events::Event::PendingHTLCsForwardable { .. } => { },
1523                                 $crate::util::events::Event::HTLCHandlingFailed { ref failed_next_destination, .. } => {
1524                                         assert!($expected_failures.contains(&failed_next_destination))
1525                                 },
1526                                 _ => panic!("Unexpected destination"),
1527                         }
1528                 }
1529         }}
1530 }
1531
1532 #[macro_export]
1533 /// Clears (and ignores) a PendingHTLCsForwardable event
1534 macro_rules! expect_pending_htlcs_forwardable_ignore {
1535         ($node: expr) => {{
1536                 expect_pending_htlcs_forwardable_conditions!($node, vec![]);
1537         }};
1538 }
1539
1540 #[macro_export]
1541 /// Clears (and ignores) PendingHTLCsForwardable and HTLCHandlingFailed events
1542 macro_rules! expect_pending_htlcs_forwardable_and_htlc_handling_failed_ignore {
1543         ($node: expr, $expected_failures: expr) => {{
1544                 expect_pending_htlcs_forwardable_conditions!($node, $expected_failures);
1545         }};
1546 }
1547
1548 #[macro_export]
1549 /// Handles a PendingHTLCsForwardable event
1550 macro_rules! expect_pending_htlcs_forwardable {
1551         ($node: expr) => {{
1552                 expect_pending_htlcs_forwardable_ignore!($node);
1553                 $node.node.process_pending_htlc_forwards();
1554
1555                 // Ensure process_pending_htlc_forwards is idempotent.
1556                 $node.node.process_pending_htlc_forwards();
1557         }};
1558 }
1559
1560 #[macro_export]
1561 /// Handles a PendingHTLCsForwardable and HTLCHandlingFailed event
1562 macro_rules! expect_pending_htlcs_forwardable_and_htlc_handling_failed {
1563         ($node: expr, $expected_failures: expr) => {{
1564                 expect_pending_htlcs_forwardable_and_htlc_handling_failed_ignore!($node, $expected_failures);
1565                 $node.node.process_pending_htlc_forwards();
1566
1567                 // Ensure process_pending_htlc_forwards is idempotent.
1568                 $node.node.process_pending_htlc_forwards();
1569         }}
1570 }
1571
1572 #[cfg(test)]
1573 macro_rules! expect_pending_htlcs_forwardable_from_events {
1574         ($node: expr, $events: expr, $ignore: expr) => {{
1575                 assert_eq!($events.len(), 1);
1576                 match $events[0] {
1577                         Event::PendingHTLCsForwardable { .. } => { },
1578                         _ => panic!("Unexpected event"),
1579                 };
1580                 if $ignore {
1581                         $node.node.process_pending_htlc_forwards();
1582
1583                         // Ensure process_pending_htlc_forwards is idempotent.
1584                         $node.node.process_pending_htlc_forwards();
1585                 }
1586         }}
1587 }
1588 #[macro_export]
1589 #[cfg(any(test, feature = "_bench_unstable", feature = "_test_utils"))]
1590 macro_rules! expect_payment_claimable {
1591         ($node: expr, $expected_payment_hash: expr, $expected_payment_secret: expr, $expected_recv_value: expr) => {
1592                 expect_payment_claimable!($node, $expected_payment_hash, $expected_payment_secret, $expected_recv_value, None, $node.node.get_our_node_id())
1593         };
1594         ($node: expr, $expected_payment_hash: expr, $expected_payment_secret: expr, $expected_recv_value: expr, $expected_payment_preimage: expr, $expected_receiver_node_id: expr) => {
1595                 let events = $node.node.get_and_clear_pending_events();
1596                 assert_eq!(events.len(), 1);
1597                 match events[0] {
1598                         $crate::util::events::Event::PaymentClaimable { ref payment_hash, ref purpose, amount_msat, receiver_node_id, via_channel_id: _, via_user_channel_id: _ } => {
1599                                 assert_eq!($expected_payment_hash, *payment_hash);
1600                                 assert_eq!($expected_recv_value, amount_msat);
1601                                 assert_eq!($expected_receiver_node_id, receiver_node_id.unwrap());
1602                                 match purpose {
1603                                         $crate::util::events::PaymentPurpose::InvoicePayment { payment_preimage, payment_secret, .. } => {
1604                                                 assert_eq!(&$expected_payment_preimage, payment_preimage);
1605                                                 assert_eq!($expected_payment_secret, *payment_secret);
1606                                         },
1607                                         _ => {},
1608                                 }
1609                         },
1610                         _ => panic!("Unexpected event"),
1611                 }
1612         }
1613 }
1614
1615 #[macro_export]
1616 #[cfg(any(test, feature = "_bench_unstable", feature = "_test_utils"))]
1617 macro_rules! expect_payment_claimed {
1618         ($node: expr, $expected_payment_hash: expr, $expected_recv_value: expr) => {
1619                 let events = $node.node.get_and_clear_pending_events();
1620                 assert_eq!(events.len(), 1);
1621                 match events[0] {
1622                         $crate::util::events::Event::PaymentClaimed { ref payment_hash, amount_msat, .. } => {
1623                                 assert_eq!($expected_payment_hash, *payment_hash);
1624                                 assert_eq!($expected_recv_value, amount_msat);
1625                         },
1626                         _ => panic!("Unexpected event"),
1627                 }
1628         }
1629 }
1630
1631 #[cfg(test)]
1632 #[macro_export]
1633 macro_rules! expect_payment_sent_without_paths {
1634         ($node: expr, $expected_payment_preimage: expr) => {
1635                 expect_payment_sent!($node, $expected_payment_preimage, None::<u64>, false);
1636         };
1637         ($node: expr, $expected_payment_preimage: expr, $expected_fee_msat_opt: expr) => {
1638                 expect_payment_sent!($node, $expected_payment_preimage, $expected_fee_msat_opt, false);
1639         }
1640 }
1641
1642 #[macro_export]
1643 macro_rules! expect_payment_sent {
1644         ($node: expr, $expected_payment_preimage: expr) => {
1645                 $crate::expect_payment_sent!($node, $expected_payment_preimage, None::<u64>, true);
1646         };
1647         ($node: expr, $expected_payment_preimage: expr, $expected_fee_msat_opt: expr) => {
1648                 $crate::expect_payment_sent!($node, $expected_payment_preimage, $expected_fee_msat_opt, true);
1649         };
1650         ($node: expr, $expected_payment_preimage: expr, $expected_fee_msat_opt: expr, $expect_paths: expr) => { {
1651                 use bitcoin::hashes::Hash as _;
1652                 let events = $node.node.get_and_clear_pending_events();
1653                 let expected_payment_hash = $crate::ln::PaymentHash(
1654                         bitcoin::hashes::sha256::Hash::hash(&$expected_payment_preimage.0).into_inner());
1655                 if $expect_paths {
1656                         assert!(events.len() > 1);
1657                 } else {
1658                         assert_eq!(events.len(), 1);
1659                 }
1660                 let expected_payment_id = match events[0] {
1661                         $crate::util::events::Event::PaymentSent { ref payment_id, ref payment_preimage, ref payment_hash, ref fee_paid_msat } => {
1662                                 assert_eq!($expected_payment_preimage, *payment_preimage);
1663                                 assert_eq!(expected_payment_hash, *payment_hash);
1664                                 assert!(fee_paid_msat.is_some());
1665                                 if $expected_fee_msat_opt.is_some() {
1666                                         assert_eq!(*fee_paid_msat, $expected_fee_msat_opt);
1667                                 }
1668                                 payment_id.unwrap()
1669                         },
1670                         _ => panic!("Unexpected event"),
1671                 };
1672                 if $expect_paths {
1673                         for i in 1..events.len() {
1674                                 match events[i] {
1675                                         $crate::util::events::Event::PaymentPathSuccessful { payment_id, payment_hash, .. } => {
1676                                                 assert_eq!(payment_id, expected_payment_id);
1677                                                 assert_eq!(payment_hash, Some(expected_payment_hash));
1678                                         },
1679                                         _ => panic!("Unexpected event"),
1680                                 }
1681                         }
1682                 }
1683         } }
1684 }
1685
1686 #[cfg(test)]
1687 #[macro_export]
1688 macro_rules! expect_payment_path_successful {
1689         ($node: expr) => {
1690                 let events = $node.node.get_and_clear_pending_events();
1691                 assert_eq!(events.len(), 1);
1692                 match events[0] {
1693                         $crate::util::events::Event::PaymentPathSuccessful { .. } => {},
1694                         _ => panic!("Unexpected event"),
1695                 }
1696         }
1697 }
1698
1699 macro_rules! expect_payment_forwarded {
1700         ($node: expr, $prev_node: expr, $next_node: expr, $expected_fee: expr, $upstream_force_closed: expr, $downstream_force_closed: expr) => {
1701                 let events = $node.node.get_and_clear_pending_events();
1702                 assert_eq!(events.len(), 1);
1703                 match events[0] {
1704                         Event::PaymentForwarded { fee_earned_msat, prev_channel_id, claim_from_onchain_tx, next_channel_id } => {
1705                                 assert_eq!(fee_earned_msat, $expected_fee);
1706                                 if fee_earned_msat.is_some() {
1707                                         // Is the event prev_channel_id in one of the channels between the two nodes?
1708                                         assert!($node.node.list_channels().iter().any(|x| x.counterparty.node_id == $prev_node.node.get_our_node_id() && x.channel_id == prev_channel_id.unwrap()));
1709                                 }
1710                                 // We check for force closures since a force closed channel is removed from the
1711                                 // node's channel list
1712                                 if !$downstream_force_closed {
1713                                         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()));
1714                                 }
1715                                 assert_eq!(claim_from_onchain_tx, $downstream_force_closed);
1716                         },
1717                         _ => panic!("Unexpected event"),
1718                 }
1719         }
1720 }
1721
1722 #[cfg(any(test, feature = "_bench_unstable", feature = "_test_utils"))]
1723 pub fn expect_channel_ready_event<'a, 'b, 'c, 'd>(node: &'a Node<'b, 'c, 'd>, expected_counterparty_node_id: &PublicKey) {
1724         let events = node.node.get_and_clear_pending_events();
1725         assert_eq!(events.len(), 1);
1726         match events[0] {
1727                 crate::util::events::Event::ChannelReady{ ref counterparty_node_id, .. } => {
1728                         assert_eq!(*expected_counterparty_node_id, *counterparty_node_id);
1729                 },
1730                 _ => panic!("Unexpected event"),
1731         }
1732 }
1733
1734
1735 pub struct PaymentFailedConditions<'a> {
1736         pub(crate) expected_htlc_error_data: Option<(u16, &'a [u8])>,
1737         pub(crate) expected_blamed_scid: Option<u64>,
1738         pub(crate) expected_blamed_chan_closed: Option<bool>,
1739         pub(crate) expected_mpp_parts_remain: bool,
1740 }
1741
1742 impl<'a> PaymentFailedConditions<'a> {
1743         pub fn new() -> Self {
1744                 Self {
1745                         expected_htlc_error_data: None,
1746                         expected_blamed_scid: None,
1747                         expected_blamed_chan_closed: None,
1748                         expected_mpp_parts_remain: false,
1749                 }
1750         }
1751         pub fn mpp_parts_remain(mut self) -> Self {
1752                 self.expected_mpp_parts_remain = true;
1753                 self
1754         }
1755         pub fn blamed_scid(mut self, scid: u64) -> Self {
1756                 self.expected_blamed_scid = Some(scid);
1757                 self
1758         }
1759         pub fn blamed_chan_closed(mut self, closed: bool) -> Self {
1760                 self.expected_blamed_chan_closed = Some(closed);
1761                 self
1762         }
1763         pub fn expected_htlc_error_data(mut self, code: u16, data: &'a [u8]) -> Self {
1764                 self.expected_htlc_error_data = Some((code, data));
1765                 self
1766         }
1767 }
1768
1769 #[cfg(test)]
1770 macro_rules! expect_payment_failed_with_update {
1771         ($node: expr, $expected_payment_hash: expr, $payment_failed_permanently: expr, $scid: expr, $chan_closed: expr) => {
1772                 $crate::ln::functional_test_utils::expect_payment_failed_conditions(
1773                         &$node, $expected_payment_hash, $payment_failed_permanently,
1774                         $crate::ln::functional_test_utils::PaymentFailedConditions::new()
1775                                 .blamed_scid($scid).blamed_chan_closed($chan_closed));
1776         }
1777 }
1778
1779 #[cfg(test)]
1780 macro_rules! expect_payment_failed {
1781         ($node: expr, $expected_payment_hash: expr, $payment_failed_permanently: expr $(, $expected_error_code: expr, $expected_error_data: expr)*) => {
1782                 #[allow(unused_mut)]
1783                 let mut conditions = $crate::ln::functional_test_utils::PaymentFailedConditions::new();
1784                 $(
1785                         conditions = conditions.expected_htlc_error_data($expected_error_code, &$expected_error_data);
1786                 )*
1787                 $crate::ln::functional_test_utils::expect_payment_failed_conditions(&$node, $expected_payment_hash, $payment_failed_permanently, conditions);
1788         };
1789 }
1790
1791 pub fn expect_payment_failed_conditions_event<'a, 'b, 'c, 'd, 'e>(
1792         node: &'a Node<'b, 'c, 'd>, payment_failed_event: Event, expected_payment_hash: PaymentHash,
1793         expected_payment_failed_permanently: bool, conditions: PaymentFailedConditions<'e>
1794 ) {
1795         let expected_payment_id = match payment_failed_event {
1796                 Event::PaymentPathFailed { payment_hash, payment_failed_permanently, path, retry, payment_id, network_update, short_channel_id,
1797                         #[cfg(test)]
1798                         error_code,
1799                         #[cfg(test)]
1800                         error_data, .. } => {
1801                         assert_eq!(payment_hash, expected_payment_hash, "unexpected payment_hash");
1802                         assert_eq!(payment_failed_permanently, expected_payment_failed_permanently, "unexpected payment_failed_permanently value");
1803                         assert!(retry.is_some(), "expected retry.is_some()");
1804                         assert_eq!(retry.as_ref().unwrap().final_value_msat, path.last().unwrap().fee_msat, "Retry amount should match last hop in path");
1805                         assert_eq!(retry.as_ref().unwrap().payment_params.payee_pubkey, path.last().unwrap().pubkey, "Retry payee node_id should match last hop in path");
1806                         if let Some(scid) = short_channel_id {
1807                                 assert!(retry.as_ref().unwrap().payment_params.previously_failed_channels.contains(&scid));
1808                         }
1809
1810                         #[cfg(test)]
1811                         {
1812                                 assert!(error_code.is_some(), "expected error_code.is_some() = true");
1813                                 assert!(error_data.is_some(), "expected error_data.is_some() = true");
1814                                 if let Some((code, data)) = conditions.expected_htlc_error_data {
1815                                         assert_eq!(error_code.unwrap(), code, "unexpected error code");
1816                                         assert_eq!(&error_data.as_ref().unwrap()[..], data, "unexpected error data");
1817                                 }
1818                         }
1819
1820                         if let Some(chan_closed) = conditions.expected_blamed_chan_closed {
1821                                 match network_update {
1822                                         Some(NetworkUpdate::ChannelUpdateMessage { ref msg }) if !chan_closed => {
1823                                                 if let Some(scid) = conditions.expected_blamed_scid {
1824                                                         assert_eq!(msg.contents.short_channel_id, scid);
1825                                                 }
1826                                                 const CHAN_DISABLED_FLAG: u8 = 2;
1827                                                 assert_eq!(msg.contents.flags & CHAN_DISABLED_FLAG, 0);
1828                                         },
1829                                         Some(NetworkUpdate::ChannelFailure { short_channel_id, is_permanent }) if chan_closed => {
1830                                                 if let Some(scid) = conditions.expected_blamed_scid {
1831                                                         assert_eq!(short_channel_id, scid);
1832                                                 }
1833                                                 assert!(is_permanent);
1834                                         },
1835                                         Some(_) => panic!("Unexpected update type"),
1836                                         None => panic!("Expected update"),
1837                                 }
1838                         }
1839
1840                         payment_id.unwrap()
1841                 },
1842                 _ => panic!("Unexpected event"),
1843         };
1844         if !conditions.expected_mpp_parts_remain {
1845                 node.node.abandon_payment(expected_payment_id);
1846                 let events = node.node.get_and_clear_pending_events();
1847                 assert_eq!(events.len(), 1);
1848                 match events[0] {
1849                         Event::PaymentFailed { ref payment_hash, ref payment_id } => {
1850                                 assert_eq!(*payment_hash, expected_payment_hash, "unexpected second payment_hash");
1851                                 assert_eq!(*payment_id, expected_payment_id);
1852                         }
1853                         _ => panic!("Unexpected second event"),
1854                 }
1855         }
1856 }
1857
1858 pub fn expect_payment_failed_conditions<'a, 'b, 'c, 'd, 'e>(
1859         node: &'a Node<'b, 'c, 'd>, expected_payment_hash: PaymentHash, expected_payment_failed_permanently: bool,
1860         conditions: PaymentFailedConditions<'e>
1861 ) {
1862         let mut events = node.node.get_and_clear_pending_events();
1863         assert_eq!(events.len(), 1);
1864         expect_payment_failed_conditions_event(node, events.pop().unwrap(), expected_payment_hash, expected_payment_failed_permanently, conditions);
1865 }
1866
1867 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 {
1868         let payment_id = PaymentId(origin_node.keys_manager.backing.get_secure_random_bytes());
1869         origin_node.node.send_payment(&route, our_payment_hash, &Some(our_payment_secret), payment_id).unwrap();
1870         check_added_monitors!(origin_node, expected_paths.len());
1871         pass_along_route(origin_node, expected_paths, recv_value, our_payment_hash, our_payment_secret);
1872         payment_id
1873 }
1874
1875 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_claimable_expected: bool, clear_recipient_events: bool, expected_preimage: Option<PaymentPreimage>) {
1876         let mut payment_event = SendEvent::from_event(ev);
1877         let mut prev_node = origin_node;
1878
1879         for (idx, &node) in expected_path.iter().enumerate() {
1880                 assert_eq!(node.node.get_our_node_id(), payment_event.node_id);
1881
1882                 node.node.handle_update_add_htlc(&prev_node.node.get_our_node_id(), &payment_event.msgs[0]);
1883                 check_added_monitors!(node, 0);
1884                 commitment_signed_dance!(node, prev_node, payment_event.commitment_msg, false);
1885
1886                 expect_pending_htlcs_forwardable!(node);
1887
1888                 if idx == expected_path.len() - 1 && clear_recipient_events {
1889                         let events_2 = node.node.get_and_clear_pending_events();
1890                         if payment_claimable_expected {
1891                                 assert_eq!(events_2.len(), 1);
1892                                 match events_2[0] {
1893                                         Event::PaymentClaimable { ref payment_hash, ref purpose, amount_msat, receiver_node_id, ref via_channel_id, ref via_user_channel_id } => {
1894                                                 assert_eq!(our_payment_hash, *payment_hash);
1895                                                 assert_eq!(node.node.get_our_node_id(), receiver_node_id.unwrap());
1896                                                 match &purpose {
1897                                                         PaymentPurpose::InvoicePayment { payment_preimage, payment_secret, .. } => {
1898                                                                 assert_eq!(expected_preimage, *payment_preimage);
1899                                                                 assert_eq!(our_payment_secret.unwrap(), *payment_secret);
1900                                                         },
1901                                                         PaymentPurpose::SpontaneousPayment(payment_preimage) => {
1902                                                                 assert_eq!(expected_preimage.unwrap(), *payment_preimage);
1903                                                                 assert!(our_payment_secret.is_none());
1904                                                         },
1905                                                 }
1906                                                 assert_eq!(amount_msat, recv_value);
1907                                                 assert!(node.node.list_channels().iter().any(|details| details.channel_id == via_channel_id.unwrap()));
1908                                                 assert!(node.node.list_channels().iter().any(|details| details.user_channel_id == via_user_channel_id.unwrap()));
1909                                         },
1910                                         _ => panic!("Unexpected event"),
1911                                 }
1912                         } else {
1913                                 assert!(events_2.is_empty());
1914                         }
1915                 } else if idx != expected_path.len() - 1 {
1916                         let mut events_2 = node.node.get_and_clear_pending_msg_events();
1917                         assert_eq!(events_2.len(), 1);
1918                         check_added_monitors!(node, 1);
1919                         payment_event = SendEvent::from_event(events_2.remove(0));
1920                         assert_eq!(payment_event.msgs.len(), 1);
1921                 }
1922
1923                 prev_node = node;
1924         }
1925 }
1926
1927 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_claimable_expected: bool, expected_preimage: Option<PaymentPreimage>) {
1928         do_pass_along_path(origin_node, expected_path, recv_value, our_payment_hash, our_payment_secret, ev, payment_claimable_expected, true, expected_preimage);
1929 }
1930
1931 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) {
1932         let mut events = origin_node.node.get_and_clear_pending_msg_events();
1933         assert_eq!(events.len(), expected_route.len());
1934         for (path_idx, expected_path) in expected_route.iter().enumerate() {
1935                 let (ev, updated_events) = remove_first_msg_event_to_node(&expected_path[0].node.get_our_node_id(), &events);
1936                 events = updated_events;
1937                 // Once we've gotten through all the HTLCs, the last one should result in a
1938                 // PaymentClaimable (but each previous one should not!), .
1939                 let expect_payment = path_idx == expected_route.len() - 1;
1940                 pass_along_path(origin_node, expected_path, recv_value, our_payment_hash.clone(), Some(our_payment_secret), ev, expect_payment, None);
1941         }
1942 }
1943
1944 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) {
1945         let (our_payment_preimage, our_payment_hash, our_payment_secret) = get_payment_preimage_hash!(expected_route.last().unwrap());
1946         let payment_id = send_along_route_with_secret(origin_node, route, &[expected_route], recv_value, our_payment_hash, our_payment_secret);
1947         (our_payment_preimage, our_payment_hash, our_payment_secret, payment_id)
1948 }
1949
1950 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 {
1951         for path in expected_paths.iter() {
1952                 assert_eq!(path.last().unwrap().node.get_our_node_id(), expected_paths[0].last().unwrap().node.get_our_node_id());
1953         }
1954         expected_paths[0].last().unwrap().node.claim_funds(our_payment_preimage);
1955
1956         let claim_event = expected_paths[0].last().unwrap().node.get_and_clear_pending_events();
1957         assert_eq!(claim_event.len(), 1);
1958         match claim_event[0] {
1959                 Event::PaymentClaimed { purpose: PaymentPurpose::SpontaneousPayment(preimage), .. }|
1960                 Event::PaymentClaimed { purpose: PaymentPurpose::InvoicePayment { payment_preimage: Some(preimage), ..}, .. } =>
1961                         assert_eq!(preimage, our_payment_preimage),
1962                 Event::PaymentClaimed { purpose: PaymentPurpose::InvoicePayment { .. }, payment_hash, .. } =>
1963                         assert_eq!(&payment_hash.0, &Sha256::hash(&our_payment_preimage.0)[..]),
1964                 _ => panic!(),
1965         }
1966
1967         check_added_monitors!(expected_paths[0].last().unwrap(), expected_paths.len());
1968
1969         let mut expected_total_fee_msat = 0;
1970
1971         macro_rules! msgs_from_ev {
1972                 ($ev: expr) => {
1973                         match $ev {
1974                                 &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 } } => {
1975                                         assert!(update_add_htlcs.is_empty());
1976                                         assert_eq!(update_fulfill_htlcs.len(), 1);
1977                                         assert!(update_fail_htlcs.is_empty());
1978                                         assert!(update_fail_malformed_htlcs.is_empty());
1979                                         assert!(update_fee.is_none());
1980                                         ((update_fulfill_htlcs[0].clone(), commitment_signed.clone()), node_id.clone())
1981                                 },
1982                                 _ => panic!("Unexpected event"),
1983                         }
1984                 }
1985         }
1986         let mut per_path_msgs: Vec<((msgs::UpdateFulfillHTLC, msgs::CommitmentSigned), PublicKey)> = Vec::with_capacity(expected_paths.len());
1987         let mut events = expected_paths[0].last().unwrap().node.get_and_clear_pending_msg_events();
1988         assert_eq!(events.len(), expected_paths.len());
1989
1990         if events.len() == 1 {
1991                 per_path_msgs.push(msgs_from_ev!(&events[0]));
1992         } else {
1993                 for expected_path in expected_paths.iter() {
1994                         // For MPP payments, we always want the message to the first node in the path.
1995                         let (ev, updated_events) = remove_first_msg_event_to_node(&expected_path[0].node.get_our_node_id(), &events);
1996                         per_path_msgs.push(msgs_from_ev!(&ev));
1997                         events = updated_events;
1998                 }
1999         }
2000
2001         for (expected_route, (path_msgs, next_hop)) in expected_paths.iter().zip(per_path_msgs.drain(..)) {
2002                 let mut next_msgs = Some(path_msgs);
2003                 let mut expected_next_node = next_hop;
2004
2005                 macro_rules! last_update_fulfill_dance {
2006                         ($node: expr, $prev_node: expr) => {
2007                                 {
2008                                         $node.node.handle_update_fulfill_htlc(&$prev_node.node.get_our_node_id(), &next_msgs.as_ref().unwrap().0);
2009                                         check_added_monitors!($node, 0);
2010                                         assert!($node.node.get_and_clear_pending_msg_events().is_empty());
2011                                         commitment_signed_dance!($node, $prev_node, next_msgs.as_ref().unwrap().1, false);
2012                                 }
2013                         }
2014                 }
2015                 macro_rules! mid_update_fulfill_dance {
2016                         ($node: expr, $prev_node: expr, $next_node: expr, $new_msgs: expr) => {
2017                                 {
2018                                         $node.node.handle_update_fulfill_htlc(&$prev_node.node.get_our_node_id(), &next_msgs.as_ref().unwrap().0);
2019                                         let fee = {
2020                                                 let per_peer_state = $node.node.per_peer_state.read().unwrap();
2021                                                 let peer_state = per_peer_state.get(&$prev_node.node.get_our_node_id())
2022                                                         .unwrap().lock().unwrap();
2023                                                 let channel = peer_state.channel_by_id.get(&next_msgs.as_ref().unwrap().0.channel_id).unwrap();
2024                                                 if let Some(prev_config) = channel.prev_config() {
2025                                                         prev_config.forwarding_fee_base_msat
2026                                                 } else {
2027                                                         channel.config().forwarding_fee_base_msat
2028                                                 }
2029                                         };
2030                                         expect_payment_forwarded!($node, $next_node, $prev_node, Some(fee as u64), false, false);
2031                                         expected_total_fee_msat += fee as u64;
2032                                         check_added_monitors!($node, 1);
2033                                         let new_next_msgs = if $new_msgs {
2034                                                 let events = $node.node.get_and_clear_pending_msg_events();
2035                                                 assert_eq!(events.len(), 1);
2036                                                 let (res, nexthop) = msgs_from_ev!(&events[0]);
2037                                                 expected_next_node = nexthop;
2038                                                 Some(res)
2039                                         } else {
2040                                                 assert!($node.node.get_and_clear_pending_msg_events().is_empty());
2041                                                 None
2042                                         };
2043                                         commitment_signed_dance!($node, $prev_node, next_msgs.as_ref().unwrap().1, false);
2044                                         next_msgs = new_next_msgs;
2045                                 }
2046                         }
2047                 }
2048
2049                 let mut prev_node = expected_route.last().unwrap();
2050                 for (idx, node) in expected_route.iter().rev().enumerate().skip(1) {
2051                         assert_eq!(expected_next_node, node.node.get_our_node_id());
2052                         let update_next_msgs = !skip_last || idx != expected_route.len() - 1;
2053                         if next_msgs.is_some() {
2054                                 // Since we are traversing in reverse, next_node is actually the previous node
2055                                 let next_node: &Node;
2056                                 if idx == expected_route.len() - 1 {
2057                                         next_node = origin_node;
2058                                 } else {
2059                                         next_node = expected_route[expected_route.len() - 1 - idx - 1];
2060                                 }
2061                                 mid_update_fulfill_dance!(node, prev_node, next_node, update_next_msgs);
2062                         } else {
2063                                 assert!(!update_next_msgs);
2064                                 assert!(node.node.get_and_clear_pending_msg_events().is_empty());
2065                         }
2066                         if !skip_last && idx == expected_route.len() - 1 {
2067                                 assert_eq!(expected_next_node, origin_node.node.get_our_node_id());
2068                         }
2069
2070                         prev_node = node;
2071                 }
2072
2073                 if !skip_last {
2074                         last_update_fulfill_dance!(origin_node, expected_route.first().unwrap());
2075                 }
2076         }
2077
2078         // Ensure that claim_funds is idempotent.
2079         expected_paths[0].last().unwrap().node.claim_funds(our_payment_preimage);
2080         assert!(expected_paths[0].last().unwrap().node.get_and_clear_pending_msg_events().is_empty());
2081         check_added_monitors!(expected_paths[0].last().unwrap(), 0);
2082
2083         expected_total_fee_msat
2084 }
2085 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) {
2086         let expected_total_fee_msat = do_claim_payment_along_route(origin_node, expected_paths, skip_last, our_payment_preimage);
2087         if !skip_last {
2088                 expect_payment_sent!(origin_node, our_payment_preimage, Some(expected_total_fee_msat));
2089         }
2090 }
2091
2092 pub fn claim_payment<'a, 'b, 'c>(origin_node: &Node<'a, 'b, 'c>, expected_route: &[&Node<'a, 'b, 'c>], our_payment_preimage: PaymentPreimage) {
2093         claim_payment_along_route(origin_node, &[expected_route], false, our_payment_preimage);
2094 }
2095
2096 pub const TEST_FINAL_CLTV: u32 = 70;
2097
2098 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) {
2099         let payment_params = PaymentParameters::from_node_id(expected_route.last().unwrap().node.get_our_node_id(), TEST_FINAL_CLTV)
2100                 .with_features(expected_route.last().unwrap().node.invoice_features());
2101         let route = get_route!(origin_node, payment_params, recv_value, TEST_FINAL_CLTV).unwrap();
2102         assert_eq!(route.paths.len(), 1);
2103         assert_eq!(route.paths[0].len(), expected_route.len());
2104         for (node, hop) in expected_route.iter().zip(route.paths[0].iter()) {
2105                 assert_eq!(hop.pubkey, node.node.get_our_node_id());
2106         }
2107
2108         let res = send_along_route(origin_node, route, expected_route, recv_value);
2109         (res.0, res.1, res.2)
2110 }
2111
2112 pub fn route_over_limit<'a, 'b, 'c>(origin_node: &Node<'a, 'b, 'c>, expected_route: &[&Node<'a, 'b, 'c>], recv_value: u64)  {
2113         let payment_params = PaymentParameters::from_node_id(expected_route.last().unwrap().node.get_our_node_id(), TEST_FINAL_CLTV)
2114                 .with_features(expected_route.last().unwrap().node.invoice_features());
2115         let network_graph = origin_node.network_graph.read_only();
2116         let scorer = test_utils::TestScorer::with_penalty(0);
2117         let seed = [0u8; 32];
2118         let keys_manager = test_utils::TestKeysInterface::new(&seed, Network::Testnet);
2119         let random_seed_bytes = keys_manager.get_secure_random_bytes();
2120         let route = get_route(
2121                 &origin_node.node.get_our_node_id(), &payment_params, &network_graph,
2122                 None, recv_value, TEST_FINAL_CLTV, origin_node.logger, &scorer, &random_seed_bytes).unwrap();
2123         assert_eq!(route.paths.len(), 1);
2124         assert_eq!(route.paths[0].len(), expected_route.len());
2125         for (node, hop) in expected_route.iter().zip(route.paths[0].iter()) {
2126                 assert_eq!(hop.pubkey, node.node.get_our_node_id());
2127         }
2128
2129         let (_, our_payment_hash, our_payment_preimage) = get_payment_preimage_hash!(expected_route.last().unwrap());
2130         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 },
2131                 assert!(err.contains("Cannot send value that would put us over the max HTLC value in flight our peer will accept")));
2132 }
2133
2134 pub fn send_payment<'a, 'b, 'c>(origin: &Node<'a, 'b, 'c>, expected_route: &[&Node<'a, 'b, 'c>], recv_value: u64)  {
2135         let our_payment_preimage = route_payment(&origin, expected_route, recv_value).0;
2136         claim_payment(&origin, expected_route, our_payment_preimage);
2137 }
2138
2139 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) {
2140         for path in expected_paths.iter() {
2141                 assert_eq!(path.last().unwrap().node.get_our_node_id(), expected_paths[0].last().unwrap().node.get_our_node_id());
2142         }
2143         expected_paths[0].last().unwrap().node.fail_htlc_backwards(&our_payment_hash);
2144         let expected_destinations: Vec<HTLCDestination> = repeat(HTLCDestination::FailedPayment { payment_hash: our_payment_hash }).take(expected_paths.len()).collect();
2145         expect_pending_htlcs_forwardable_and_htlc_handling_failed!(expected_paths[0].last().unwrap(), expected_destinations);
2146
2147         pass_failed_payment_back(origin_node, expected_paths, skip_last, our_payment_hash);
2148 }
2149
2150 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) {
2151         let expected_payment_id = pass_failed_payment_back_no_abandon(origin_node, expected_paths_slice, skip_last, our_payment_hash);
2152         if !skip_last {
2153                 origin_node.node.abandon_payment(expected_payment_id.unwrap());
2154                 let events = origin_node.node.get_and_clear_pending_events();
2155                 assert_eq!(events.len(), 1);
2156                 match events[0] {
2157                         Event::PaymentFailed { ref payment_hash, ref payment_id } => {
2158                                 assert_eq!(*payment_hash, our_payment_hash, "unexpected second payment_hash");
2159                                 assert_eq!(*payment_id, expected_payment_id.unwrap());
2160                         }
2161                         _ => panic!("Unexpected second event"),
2162                 }
2163         }
2164 }
2165
2166 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> {
2167         let mut expected_paths: Vec<_> = expected_paths_slice.iter().collect();
2168         check_added_monitors!(expected_paths[0].last().unwrap(), expected_paths.len());
2169
2170         let mut per_path_msgs: Vec<((msgs::UpdateFailHTLC, msgs::CommitmentSigned), PublicKey)> = Vec::with_capacity(expected_paths.len());
2171         let events = expected_paths[0].last().unwrap().node.get_and_clear_pending_msg_events();
2172         assert_eq!(events.len(), expected_paths.len());
2173         for ev in events.iter() {
2174                 let (update_fail, commitment_signed, node_id) = match ev {
2175                         &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 } } => {
2176                                 assert!(update_add_htlcs.is_empty());
2177                                 assert!(update_fulfill_htlcs.is_empty());
2178                                 assert_eq!(update_fail_htlcs.len(), 1);
2179                                 assert!(update_fail_malformed_htlcs.is_empty());
2180                                 assert!(update_fee.is_none());
2181                                 (update_fail_htlcs[0].clone(), commitment_signed.clone(), node_id.clone())
2182                         },
2183                         _ => panic!("Unexpected event"),
2184                 };
2185                 per_path_msgs.push(((update_fail, commitment_signed), node_id));
2186         }
2187         per_path_msgs.sort_unstable_by(|(_, node_id_a), (_, node_id_b)| node_id_a.cmp(node_id_b));
2188         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()));
2189
2190         let mut expected_payment_id = None;
2191
2192         for (i, (expected_route, (path_msgs, next_hop))) in expected_paths.iter().zip(per_path_msgs.drain(..)).enumerate() {
2193                 let mut next_msgs = Some(path_msgs);
2194                 let mut expected_next_node = next_hop;
2195                 let mut prev_node = expected_route.last().unwrap();
2196
2197                 for (idx, node) in expected_route.iter().rev().enumerate().skip(1) {
2198                         assert_eq!(expected_next_node, node.node.get_our_node_id());
2199                         let update_next_node = !skip_last || idx != expected_route.len() - 1;
2200                         if next_msgs.is_some() {
2201                                 node.node.handle_update_fail_htlc(&prev_node.node.get_our_node_id(), &next_msgs.as_ref().unwrap().0);
2202                                 commitment_signed_dance!(node, prev_node, next_msgs.as_ref().unwrap().1, update_next_node);
2203                                 if !update_next_node {
2204                                         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 }]);
2205                                 }
2206                         }
2207                         let events = node.node.get_and_clear_pending_msg_events();
2208                         if update_next_node {
2209                                 assert_eq!(events.len(), 1);
2210                                 match events[0] {
2211                                         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 } } => {
2212                                                 assert!(update_add_htlcs.is_empty());
2213                                                 assert!(update_fulfill_htlcs.is_empty());
2214                                                 assert_eq!(update_fail_htlcs.len(), 1);
2215                                                 assert!(update_fail_malformed_htlcs.is_empty());
2216                                                 assert!(update_fee.is_none());
2217                                                 expected_next_node = node_id.clone();
2218                                                 next_msgs = Some((update_fail_htlcs[0].clone(), commitment_signed.clone()));
2219                                         },
2220                                         _ => panic!("Unexpected event"),
2221                                 }
2222                         } else {
2223                                 assert!(events.is_empty());
2224                         }
2225                         if !skip_last && idx == expected_route.len() - 1 {
2226                                 assert_eq!(expected_next_node, origin_node.node.get_our_node_id());
2227                         }
2228
2229                         prev_node = node;
2230                 }
2231
2232                 if !skip_last {
2233                         let prev_node = expected_route.first().unwrap();
2234                         origin_node.node.handle_update_fail_htlc(&prev_node.node.get_our_node_id(), &next_msgs.as_ref().unwrap().0);
2235                         check_added_monitors!(origin_node, 0);
2236                         assert!(origin_node.node.get_and_clear_pending_msg_events().is_empty());
2237                         commitment_signed_dance!(origin_node, prev_node, next_msgs.as_ref().unwrap().1, false);
2238                         let events = origin_node.node.get_and_clear_pending_events();
2239                         assert_eq!(events.len(), 1);
2240                         expected_payment_id = Some(match events[0] {
2241                                 Event::PaymentPathFailed { payment_hash, payment_failed_permanently, all_paths_failed, ref path, ref payment_id, .. } => {
2242                                         assert_eq!(payment_hash, our_payment_hash);
2243                                         assert!(payment_failed_permanently);
2244                                         assert_eq!(all_paths_failed, i == expected_paths.len() - 1);
2245                                         for (idx, hop) in expected_route.iter().enumerate() {
2246                                                 assert_eq!(hop.node.get_our_node_id(), path[idx].pubkey);
2247                                         }
2248                                         payment_id.unwrap()
2249                                 },
2250                                 _ => panic!("Unexpected event"),
2251                         });
2252                 }
2253         }
2254
2255         // Ensure that fail_htlc_backwards is idempotent.
2256         expected_paths[0].last().unwrap().node.fail_htlc_backwards(&our_payment_hash);
2257         assert!(expected_paths[0].last().unwrap().node.get_and_clear_pending_events().is_empty());
2258         assert!(expected_paths[0].last().unwrap().node.get_and_clear_pending_msg_events().is_empty());
2259         check_added_monitors!(expected_paths[0].last().unwrap(), 0);
2260
2261         expected_payment_id
2262 }
2263
2264 pub fn fail_payment<'a, 'b, 'c>(origin_node: &Node<'a, 'b, 'c>, expected_path: &[&Node<'a, 'b, 'c>], our_payment_hash: PaymentHash)  {
2265         fail_payment_along_route(origin_node, &[&expected_path[..]], false, our_payment_hash);
2266 }
2267
2268 pub fn create_chanmon_cfgs(node_count: usize) -> Vec<TestChanMonCfg> {
2269         let mut chan_mon_cfgs = Vec::new();
2270         for i in 0..node_count {
2271                 let tx_broadcaster = test_utils::TestBroadcaster {
2272                         txn_broadcasted: Mutex::new(Vec::new()),
2273                         blocks: Arc::new(Mutex::new(vec![(genesis_block(Network::Testnet), 0)])),
2274                 };
2275                 let fee_estimator = test_utils::TestFeeEstimator { sat_per_kw: Mutex::new(253) };
2276                 let chain_source = test_utils::TestChainSource::new(Network::Testnet);
2277                 let logger = test_utils::TestLogger::with_id(format!("node {}", i));
2278                 let persister = test_utils::TestPersister::new();
2279                 let seed = [i as u8; 32];
2280                 let keys_manager = test_utils::TestKeysInterface::new(&seed, Network::Testnet);
2281
2282                 chan_mon_cfgs.push(TestChanMonCfg { tx_broadcaster, fee_estimator, chain_source, logger, persister, keys_manager });
2283         }
2284
2285         chan_mon_cfgs
2286 }
2287
2288 pub fn create_node_cfgs<'a>(node_count: usize, chanmon_cfgs: &'a Vec<TestChanMonCfg>) -> Vec<NodeCfg<'a>> {
2289         let mut nodes = Vec::new();
2290
2291         for i in 0..node_count {
2292                 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);
2293                 let network_graph = Arc::new(NetworkGraph::new(chanmon_cfgs[i].chain_source.genesis_hash, &chanmon_cfgs[i].logger));
2294                 let seed = [i as u8; 32];
2295                 nodes.push(NodeCfg {
2296                         chain_source: &chanmon_cfgs[i].chain_source,
2297                         logger: &chanmon_cfgs[i].logger,
2298                         tx_broadcaster: &chanmon_cfgs[i].tx_broadcaster,
2299                         fee_estimator: &chanmon_cfgs[i].fee_estimator,
2300                         router: test_utils::TestRouter::new(network_graph.clone()),
2301                         chain_monitor,
2302                         keys_manager: &chanmon_cfgs[i].keys_manager,
2303                         node_seed: seed,
2304                         network_graph,
2305                         override_init_features: Rc::new(RefCell::new(None)),
2306                 });
2307         }
2308
2309         nodes
2310 }
2311
2312 pub fn test_default_channel_config() -> UserConfig {
2313         let mut default_config = UserConfig::default();
2314         // Set cltv_expiry_delta slightly lower to keep the final CLTV values inside one byte in our
2315         // tests so that our script-length checks don't fail (see ACCEPTED_HTLC_SCRIPT_WEIGHT).
2316         default_config.channel_config.cltv_expiry_delta = MIN_CLTV_EXPIRY_DELTA;
2317         default_config.channel_handshake_config.announced_channel = true;
2318         default_config.channel_handshake_limits.force_announced_channel_preference = false;
2319         // When most of our tests were written, the default HTLC minimum was fixed at 1000.
2320         // It now defaults to 1, so we simply set it to the expected value here.
2321         default_config.channel_handshake_config.our_htlc_minimum_msat = 1000;
2322         // When most of our tests were written, we didn't have the notion of a `max_dust_htlc_exposure_msat`,
2323         // It now defaults to 5_000_000 msat; to avoid interfering with tests we bump it to 50_000_000 msat.
2324         default_config.channel_config.max_dust_htlc_exposure_msat = 50_000_000;
2325         default_config
2326 }
2327
2328 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, &'a test_utils::TestKeysInterface, &'a test_utils::TestKeysInterface, &'b test_utils::TestFeeEstimator, &'a test_utils::TestRouter<'b>, &'b test_utils::TestLogger>> {
2329         let mut chanmgrs = Vec::new();
2330         for i in 0..node_count {
2331                 let network = Network::Testnet;
2332                 let params = ChainParameters {
2333                         network,
2334                         best_block: BestBlock::from_genesis(network),
2335                 };
2336                 let node = ChannelManager::new(cfgs[i].fee_estimator, &cfgs[i].chain_monitor, cfgs[i].tx_broadcaster, &cfgs[i].router, cfgs[i].logger, cfgs[i].keys_manager,
2337                         cfgs[i].keys_manager, cfgs[i].keys_manager, if node_config[i].is_some() { node_config[i].clone().unwrap() } else { test_default_channel_config() }, params);
2338                 chanmgrs.push(node);
2339         }
2340
2341         chanmgrs
2342 }
2343
2344 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, &'b test_utils::TestKeysInterface, &'b test_utils::TestKeysInterface, &'c test_utils::TestFeeEstimator, &'c test_utils::TestRouter, &'c test_utils::TestLogger>>) -> Vec<Node<'a, 'b, 'c>> {
2345         let mut nodes = Vec::new();
2346         let chan_count = Rc::new(RefCell::new(0));
2347         let payment_count = Rc::new(RefCell::new(0));
2348         let connect_style = Rc::new(RefCell::new(ConnectStyle::random_style()));
2349
2350         for i in 0..node_count {
2351                 let gossip_sync = P2PGossipSync::new(cfgs[i].network_graph.as_ref(), None, cfgs[i].logger);
2352                 nodes.push(Node{
2353                         chain_source: cfgs[i].chain_source, tx_broadcaster: cfgs[i].tx_broadcaster,
2354                         fee_estimator: cfgs[i].fee_estimator, router: &cfgs[i].router,
2355                         chain_monitor: &cfgs[i].chain_monitor, keys_manager: &cfgs[i].keys_manager,
2356                         node: &chan_mgrs[i], network_graph: cfgs[i].network_graph.as_ref(), gossip_sync,
2357                         node_seed: cfgs[i].node_seed, network_chan_count: chan_count.clone(),
2358                         network_payment_count: payment_count.clone(), logger: cfgs[i].logger,
2359                         blocks: Arc::clone(&cfgs[i].tx_broadcaster.blocks),
2360                         connect_style: Rc::clone(&connect_style),
2361                         override_init_features: Rc::clone(&cfgs[i].override_init_features),
2362                 })
2363         }
2364
2365         for i in 0..node_count {
2366                 for j in (i+1)..node_count {
2367                         nodes[i].node.peer_connected(&nodes[j].node.get_our_node_id(), &msgs::Init { features: nodes[j].override_init_features.borrow().clone().unwrap_or_else(|| nodes[j].node.init_features()), remote_network_address: None }).unwrap();
2368                         nodes[j].node.peer_connected(&nodes[i].node.get_our_node_id(), &msgs::Init { features: nodes[i].override_init_features.borrow().clone().unwrap_or_else(|| nodes[i].node.init_features()), remote_network_address: None }).unwrap();
2369                 }
2370         }
2371
2372         nodes
2373 }
2374
2375 // Note that the following only works for CLTV values up to 128
2376 pub const ACCEPTED_HTLC_SCRIPT_WEIGHT: usize = 137; //Here we have a diff due to HTLC CLTV expiry being < 2^15 in test
2377
2378 #[derive(PartialEq)]
2379 pub enum HTLCType { NONE, TIMEOUT, SUCCESS }
2380 /// Tests that the given node has broadcast transactions for the given Channel
2381 ///
2382 /// First checks that the latest holder commitment tx has been broadcast, unless an explicit
2383 /// commitment_tx is provided, which may be used to test that a remote commitment tx was
2384 /// broadcast and the revoked outputs were claimed.
2385 ///
2386 /// Next tests that there is (or is not) a transaction that spends the commitment transaction
2387 /// that appears to be the type of HTLC transaction specified in has_htlc_tx.
2388 ///
2389 /// All broadcast transactions must be accounted for in one of the above three types of we'll
2390 /// also fail.
2391 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>  {
2392         let mut node_txn = node.tx_broadcaster.txn_broadcasted.lock().unwrap();
2393         assert!(node_txn.len() >= if commitment_tx.is_some() { 0 } else { 1 } + if has_htlc_tx == HTLCType::NONE { 0 } else { 1 });
2394
2395         let mut res = Vec::with_capacity(2);
2396         node_txn.retain(|tx| {
2397                 if tx.input.len() == 1 && tx.input[0].previous_output.txid == chan.3.txid() {
2398                         check_spends!(tx, chan.3);
2399                         if commitment_tx.is_none() {
2400                                 res.push(tx.clone());
2401                         }
2402                         false
2403                 } else { true }
2404         });
2405         if let Some(explicit_tx) = commitment_tx {
2406                 res.push(explicit_tx.clone());
2407         }
2408
2409         assert_eq!(res.len(), 1);
2410
2411         if has_htlc_tx != HTLCType::NONE {
2412                 node_txn.retain(|tx| {
2413                         if tx.input.len() == 1 && tx.input[0].previous_output.txid == res[0].txid() {
2414                                 check_spends!(tx, res[0]);
2415                                 if has_htlc_tx == HTLCType::TIMEOUT {
2416                                         assert!(tx.lock_time.0 != 0);
2417                                 } else {
2418                                         assert!(tx.lock_time.0 == 0);
2419                                 }
2420                                 res.push(tx.clone());
2421                                 false
2422                         } else { true }
2423                 });
2424                 assert!(res.len() == 2 || res.len() == 3);
2425                 if res.len() == 3 {
2426                         assert_eq!(res[1], res[2]);
2427                 }
2428         }
2429
2430         assert!(node_txn.is_empty());
2431         res
2432 }
2433
2434 /// Tests that the given node has broadcast a claim transaction against the provided revoked
2435 /// HTLC transaction.
2436 pub fn test_revoked_htlc_claim_txn_broadcast<'a, 'b, 'c>(node: &Node<'a, 'b, 'c>, revoked_tx: Transaction, commitment_revoked_tx: Transaction)  {
2437         let mut node_txn = node.tx_broadcaster.txn_broadcasted.lock().unwrap();
2438         // We may issue multiple claiming transaction on revoked outputs due to block rescan
2439         // for revoked htlc outputs
2440         if node_txn.len() != 1 && node_txn.len() != 2 && node_txn.len() != 3 { assert!(false); }
2441         node_txn.retain(|tx| {
2442                 if tx.input.len() == 1 && tx.input[0].previous_output.txid == revoked_tx.txid() {
2443                         check_spends!(tx, revoked_tx);
2444                         false
2445                 } else { true }
2446         });
2447         node_txn.retain(|tx| {
2448                 check_spends!(tx, commitment_revoked_tx);
2449                 false
2450         });
2451         assert!(node_txn.is_empty());
2452 }
2453
2454 pub fn check_preimage_claim<'a, 'b, 'c>(node: &Node<'a, 'b, 'c>, prev_txn: &Vec<Transaction>) -> Vec<Transaction>  {
2455         let mut node_txn = node.tx_broadcaster.txn_broadcasted.lock().unwrap();
2456
2457         assert!(node_txn.len() >= 1);
2458         assert_eq!(node_txn[0].input.len(), 1);
2459         let mut found_prev = false;
2460
2461         for tx in prev_txn {
2462                 if node_txn[0].input[0].previous_output.txid == tx.txid() {
2463                         check_spends!(node_txn[0], tx);
2464                         let mut iter = node_txn[0].input[0].witness.iter();
2465                         iter.next().expect("expected 3 witness items");
2466                         iter.next().expect("expected 3 witness items");
2467                         assert!(iter.next().expect("expected 3 witness items").len() > 106); // must spend an htlc output
2468                         assert_eq!(tx.input.len(), 1); // must spend a commitment tx
2469
2470                         found_prev = true;
2471                         break;
2472                 }
2473         }
2474         assert!(found_prev);
2475
2476         let mut res = Vec::new();
2477         mem::swap(&mut *node_txn, &mut res);
2478         res
2479 }
2480
2481 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)  {
2482         let events_1 = nodes[a].node.get_and_clear_pending_msg_events();
2483         assert_eq!(events_1.len(), 2);
2484         let as_update = match events_1[0] {
2485                 MessageSendEvent::BroadcastChannelUpdate { ref msg } => {
2486                         msg.clone()
2487                 },
2488                 _ => panic!("Unexpected event"),
2489         };
2490         match events_1[1] {
2491                 MessageSendEvent::HandleError { node_id, action: msgs::ErrorAction::SendErrorMessage { ref msg } } => {
2492                         assert_eq!(node_id, nodes[b].node.get_our_node_id());
2493                         assert_eq!(msg.data, expected_error);
2494                         if needs_err_handle {
2495                                 nodes[b].node.handle_error(&nodes[a].node.get_our_node_id(), msg);
2496                         }
2497                 },
2498                 _ => panic!("Unexpected event"),
2499         }
2500
2501         let events_2 = nodes[b].node.get_and_clear_pending_msg_events();
2502         assert_eq!(events_2.len(), if needs_err_handle { 1 } else { 2 });
2503         let bs_update = match events_2[0] {
2504                 MessageSendEvent::BroadcastChannelUpdate { ref msg } => {
2505                         msg.clone()
2506                 },
2507                 _ => panic!("Unexpected event"),
2508         };
2509         if !needs_err_handle {
2510                 match events_2[1] {
2511                         MessageSendEvent::HandleError { node_id, action: msgs::ErrorAction::SendErrorMessage { ref msg } } => {
2512                                 assert_eq!(node_id, nodes[a].node.get_our_node_id());
2513                                 assert_eq!(msg.data, expected_error);
2514                         },
2515                         _ => panic!("Unexpected event"),
2516                 }
2517         }
2518
2519         for node in nodes {
2520                 node.gossip_sync.handle_channel_update(&as_update).unwrap();
2521                 node.gossip_sync.handle_channel_update(&bs_update).unwrap();
2522         }
2523 }
2524
2525 pub fn get_announce_close_broadcast_events<'a, 'b, 'c>(nodes: &Vec<Node<'a, 'b, 'c>>, a: usize, b: usize)  {
2526         handle_announce_close_broadcast_events(nodes, a, b, false, "Channel closed because commitment or closing transaction was confirmed on chain.");
2527 }
2528
2529 #[cfg(test)]
2530 macro_rules! get_channel_value_stat {
2531         ($node: expr, $counterparty_node: expr, $channel_id: expr) => {{
2532                 let peer_state_lock = $node.node.per_peer_state.read().unwrap();
2533                 let chan_lock = peer_state_lock.get(&$counterparty_node.node.get_our_node_id()).unwrap().lock().unwrap();
2534                 let chan = chan_lock.channel_by_id.get(&$channel_id).unwrap();
2535                 chan.get_value_stat()
2536         }}
2537 }
2538
2539 macro_rules! get_chan_reestablish_msgs {
2540         ($src_node: expr, $dst_node: expr) => {
2541                 {
2542                         let mut announcements = $crate::prelude::HashSet::new();
2543                         let mut res = Vec::with_capacity(1);
2544                         for msg in $src_node.node.get_and_clear_pending_msg_events() {
2545                                 if let MessageSendEvent::SendChannelReestablish { ref node_id, ref msg } = msg {
2546                                         assert_eq!(*node_id, $dst_node.node.get_our_node_id());
2547                                         res.push(msg.clone());
2548                                 } else if let MessageSendEvent::SendChannelAnnouncement { ref node_id, ref msg, .. } = msg {
2549                                         assert_eq!(*node_id, $dst_node.node.get_our_node_id());
2550                                         announcements.insert(msg.contents.short_channel_id);
2551                                 } else {
2552                                         panic!("Unexpected event")
2553                                 }
2554                         }
2555                         for chan in $src_node.node.list_channels() {
2556                                 if chan.is_public && chan.counterparty.node_id != $dst_node.node.get_our_node_id() {
2557                                         if let Some(scid) = chan.short_channel_id {
2558                                                 assert!(announcements.remove(&scid));
2559                                         }
2560                                 }
2561                         }
2562                         assert!(announcements.is_empty());
2563                         res
2564                 }
2565         }
2566 }
2567
2568 macro_rules! handle_chan_reestablish_msgs {
2569         ($src_node: expr, $dst_node: expr) => {
2570                 {
2571                         let msg_events = $src_node.node.get_and_clear_pending_msg_events();
2572                         let mut idx = 0;
2573                         let channel_ready = if let Some(&MessageSendEvent::SendChannelReady { ref node_id, ref msg }) = msg_events.get(0) {
2574                                 idx += 1;
2575                                 assert_eq!(*node_id, $dst_node.node.get_our_node_id());
2576                                 Some(msg.clone())
2577                         } else {
2578                                 None
2579                         };
2580
2581                         if let Some(&MessageSendEvent::SendAnnouncementSignatures { ref node_id, msg: _ }) = msg_events.get(idx) {
2582                                 idx += 1;
2583                                 assert_eq!(*node_id, $dst_node.node.get_our_node_id());
2584                         }
2585
2586                         let mut had_channel_update = false; // ChannelUpdate may be now or later, but not both
2587                         if let Some(&MessageSendEvent::SendChannelUpdate { ref node_id, ref msg }) = msg_events.get(idx) {
2588                                 assert_eq!(*node_id, $dst_node.node.get_our_node_id());
2589                                 idx += 1;
2590                                 assert_eq!(msg.contents.flags & 2, 0); // "disabled" flag must not be set as we just reconnected.
2591                                 had_channel_update = true;
2592                         }
2593
2594                         let mut revoke_and_ack = None;
2595                         let mut commitment_update = None;
2596                         let order = if let Some(ev) = msg_events.get(idx) {
2597                                 match ev {
2598                                         &MessageSendEvent::SendRevokeAndACK { ref node_id, ref msg } => {
2599                                                 assert_eq!(*node_id, $dst_node.node.get_our_node_id());
2600                                                 revoke_and_ack = Some(msg.clone());
2601                                                 idx += 1;
2602                                                 RAACommitmentOrder::RevokeAndACKFirst
2603                                         },
2604                                         &MessageSendEvent::UpdateHTLCs { ref node_id, ref updates } => {
2605                                                 assert_eq!(*node_id, $dst_node.node.get_our_node_id());
2606                                                 commitment_update = Some(updates.clone());
2607                                                 idx += 1;
2608                                                 RAACommitmentOrder::CommitmentFirst
2609                                         },
2610                                         _ => RAACommitmentOrder::CommitmentFirst,
2611                                 }
2612                         } else {
2613                                 RAACommitmentOrder::CommitmentFirst
2614                         };
2615
2616                         if let Some(ev) = msg_events.get(idx) {
2617                                 match ev {
2618                                         &MessageSendEvent::SendRevokeAndACK { ref node_id, ref msg } => {
2619                                                 assert_eq!(*node_id, $dst_node.node.get_our_node_id());
2620                                                 assert!(revoke_and_ack.is_none());
2621                                                 revoke_and_ack = Some(msg.clone());
2622                                                 idx += 1;
2623                                         },
2624                                         &MessageSendEvent::UpdateHTLCs { ref node_id, ref updates } => {
2625                                                 assert_eq!(*node_id, $dst_node.node.get_our_node_id());
2626                                                 assert!(commitment_update.is_none());
2627                                                 commitment_update = Some(updates.clone());
2628                                                 idx += 1;
2629                                         },
2630                                         _ => {},
2631                                 }
2632                         }
2633
2634                         if let Some(&MessageSendEvent::SendChannelUpdate { ref node_id, ref msg }) = msg_events.get(idx) {
2635                                 assert_eq!(*node_id, $dst_node.node.get_our_node_id());
2636                                 idx += 1;
2637                                 assert_eq!(msg.contents.flags & 2, 0); // "disabled" flag must not be set as we just reconnected.
2638                                 assert!(!had_channel_update);
2639                         }
2640
2641                         assert_eq!(msg_events.len(), idx);
2642
2643                         (channel_ready, revoke_and_ack, commitment_update, order)
2644                 }
2645         }
2646 }
2647
2648 /// pending_htlc_adds includes both the holding cell and in-flight update_add_htlcs, whereas
2649 /// for claims/fails they are separated out.
2650 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))  {
2651         node_a.node.peer_connected(&node_b.node.get_our_node_id(), &msgs::Init { features: node_b.node.init_features(), remote_network_address: None }).unwrap();
2652         let reestablish_1 = get_chan_reestablish_msgs!(node_a, node_b);
2653         node_b.node.peer_connected(&node_a.node.get_our_node_id(), &msgs::Init { features: node_a.node.init_features(), remote_network_address: None }).unwrap();
2654         let reestablish_2 = get_chan_reestablish_msgs!(node_b, node_a);
2655
2656         if send_channel_ready.0 {
2657                 // If a expects a channel_ready, it better not think it has received a revoke_and_ack
2658                 // from b
2659                 for reestablish in reestablish_1.iter() {
2660                         assert_eq!(reestablish.next_remote_commitment_number, 0);
2661                 }
2662         }
2663         if send_channel_ready.1 {
2664                 // If b expects a channel_ready, it better not think it has received a revoke_and_ack
2665                 // from a
2666                 for reestablish in reestablish_2.iter() {
2667                         assert_eq!(reestablish.next_remote_commitment_number, 0);
2668                 }
2669         }
2670         if send_channel_ready.0 || send_channel_ready.1 {
2671                 // If we expect any channel_ready's, both sides better have set
2672                 // next_holder_commitment_number to 1
2673                 for reestablish in reestablish_1.iter() {
2674                         assert_eq!(reestablish.next_local_commitment_number, 1);
2675                 }
2676                 for reestablish in reestablish_2.iter() {
2677                         assert_eq!(reestablish.next_local_commitment_number, 1);
2678                 }
2679         }
2680
2681         let mut resp_1 = Vec::new();
2682         for msg in reestablish_1 {
2683                 node_b.node.handle_channel_reestablish(&node_a.node.get_our_node_id(), &msg);
2684                 resp_1.push(handle_chan_reestablish_msgs!(node_b, node_a));
2685         }
2686         if pending_cell_htlc_claims.0 != 0 || pending_cell_htlc_fails.0 != 0 {
2687                 check_added_monitors!(node_b, 1);
2688         } else {
2689                 check_added_monitors!(node_b, 0);
2690         }
2691
2692         let mut resp_2 = Vec::new();
2693         for msg in reestablish_2 {
2694                 node_a.node.handle_channel_reestablish(&node_b.node.get_our_node_id(), &msg);
2695                 resp_2.push(handle_chan_reestablish_msgs!(node_a, node_b));
2696         }
2697         if pending_cell_htlc_claims.1 != 0 || pending_cell_htlc_fails.1 != 0 {
2698                 check_added_monitors!(node_a, 1);
2699         } else {
2700                 check_added_monitors!(node_a, 0);
2701         }
2702
2703         // We don't yet support both needing updates, as that would require a different commitment dance:
2704         assert!((pending_htlc_adds.0 == 0 && pending_htlc_claims.0 == 0 && pending_htlc_fails.0 == 0 &&
2705                          pending_cell_htlc_claims.0 == 0 && pending_cell_htlc_fails.0 == 0) ||
2706                         (pending_htlc_adds.1 == 0 && pending_htlc_claims.1 == 0 && pending_htlc_fails.1 == 0 &&
2707                          pending_cell_htlc_claims.1 == 0 && pending_cell_htlc_fails.1 == 0));
2708
2709         for chan_msgs in resp_1.drain(..) {
2710                 if send_channel_ready.0 {
2711                         node_a.node.handle_channel_ready(&node_b.node.get_our_node_id(), &chan_msgs.0.unwrap());
2712                         let announcement_event = node_a.node.get_and_clear_pending_msg_events();
2713                         if !announcement_event.is_empty() {
2714                                 assert_eq!(announcement_event.len(), 1);
2715                                 if let MessageSendEvent::SendChannelUpdate { .. } = announcement_event[0] {
2716                                         //TODO: Test announcement_sigs re-sending
2717                                 } else { panic!("Unexpected event! {:?}", announcement_event[0]); }
2718                         }
2719                 } else {
2720                         assert!(chan_msgs.0.is_none());
2721                 }
2722                 if pending_raa.0 {
2723                         assert!(chan_msgs.3 == RAACommitmentOrder::RevokeAndACKFirst);
2724                         node_a.node.handle_revoke_and_ack(&node_b.node.get_our_node_id(), &chan_msgs.1.unwrap());
2725                         assert!(node_a.node.get_and_clear_pending_msg_events().is_empty());
2726                         check_added_monitors!(node_a, 1);
2727                 } else {
2728                         assert!(chan_msgs.1.is_none());
2729                 }
2730                 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 {
2731                         let commitment_update = chan_msgs.2.unwrap();
2732                         if pending_htlc_adds.0 != -1 { // We use -1 to denote a response commitment_signed
2733                                 assert_eq!(commitment_update.update_add_htlcs.len(), pending_htlc_adds.0 as usize);
2734                         } else {
2735                                 assert!(commitment_update.update_add_htlcs.is_empty());
2736                         }
2737                         assert_eq!(commitment_update.update_fulfill_htlcs.len(), pending_htlc_claims.0 + pending_cell_htlc_claims.0);
2738                         assert_eq!(commitment_update.update_fail_htlcs.len(), pending_htlc_fails.0 + pending_cell_htlc_fails.0);
2739                         assert!(commitment_update.update_fail_malformed_htlcs.is_empty());
2740                         for update_add in commitment_update.update_add_htlcs {
2741                                 node_a.node.handle_update_add_htlc(&node_b.node.get_our_node_id(), &update_add);
2742                         }
2743                         for update_fulfill in commitment_update.update_fulfill_htlcs {
2744                                 node_a.node.handle_update_fulfill_htlc(&node_b.node.get_our_node_id(), &update_fulfill);
2745                         }
2746                         for update_fail in commitment_update.update_fail_htlcs {
2747                                 node_a.node.handle_update_fail_htlc(&node_b.node.get_our_node_id(), &update_fail);
2748                         }
2749
2750                         if pending_htlc_adds.0 != -1 { // We use -1 to denote a response commitment_signed
2751                                 commitment_signed_dance!(node_a, node_b, commitment_update.commitment_signed, false);
2752                         } else {
2753                                 node_a.node.handle_commitment_signed(&node_b.node.get_our_node_id(), &commitment_update.commitment_signed);
2754                                 check_added_monitors!(node_a, 1);
2755                                 let as_revoke_and_ack = get_event_msg!(node_a, MessageSendEvent::SendRevokeAndACK, node_b.node.get_our_node_id());
2756                                 // No commitment_signed so get_event_msg's assert(len == 1) passes
2757                                 node_b.node.handle_revoke_and_ack(&node_a.node.get_our_node_id(), &as_revoke_and_ack);
2758                                 assert!(node_b.node.get_and_clear_pending_msg_events().is_empty());
2759                                 check_added_monitors!(node_b, 1);
2760                         }
2761                 } else {
2762                         assert!(chan_msgs.2.is_none());
2763                 }
2764         }
2765
2766         for chan_msgs in resp_2.drain(..) {
2767                 if send_channel_ready.1 {
2768                         node_b.node.handle_channel_ready(&node_a.node.get_our_node_id(), &chan_msgs.0.unwrap());
2769                         let announcement_event = node_b.node.get_and_clear_pending_msg_events();
2770                         if !announcement_event.is_empty() {
2771                                 assert_eq!(announcement_event.len(), 1);
2772                                 match announcement_event[0] {
2773                                         MessageSendEvent::SendChannelUpdate { .. } => {},
2774                                         MessageSendEvent::SendAnnouncementSignatures { .. } => {},
2775                                         _ => panic!("Unexpected event {:?}!", announcement_event[0]),
2776                                 }
2777                         }
2778                 } else {
2779                         assert!(chan_msgs.0.is_none());
2780                 }
2781                 if pending_raa.1 {
2782                         assert!(chan_msgs.3 == RAACommitmentOrder::RevokeAndACKFirst);
2783                         node_b.node.handle_revoke_and_ack(&node_a.node.get_our_node_id(), &chan_msgs.1.unwrap());
2784                         assert!(node_b.node.get_and_clear_pending_msg_events().is_empty());
2785                         check_added_monitors!(node_b, 1);
2786                 } else {
2787                         assert!(chan_msgs.1.is_none());
2788                 }
2789                 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 {
2790                         let commitment_update = chan_msgs.2.unwrap();
2791                         if pending_htlc_adds.1 != -1 { // We use -1 to denote a response commitment_signed
2792                                 assert_eq!(commitment_update.update_add_htlcs.len(), pending_htlc_adds.1 as usize);
2793                         }
2794                         assert_eq!(commitment_update.update_fulfill_htlcs.len(), pending_htlc_claims.1 + pending_cell_htlc_claims.1);
2795                         assert_eq!(commitment_update.update_fail_htlcs.len(), pending_htlc_fails.1 + pending_cell_htlc_fails.1);
2796                         assert!(commitment_update.update_fail_malformed_htlcs.is_empty());
2797                         for update_add in commitment_update.update_add_htlcs {
2798                                 node_b.node.handle_update_add_htlc(&node_a.node.get_our_node_id(), &update_add);
2799                         }
2800                         for update_fulfill in commitment_update.update_fulfill_htlcs {
2801                                 node_b.node.handle_update_fulfill_htlc(&node_a.node.get_our_node_id(), &update_fulfill);
2802                         }
2803                         for update_fail in commitment_update.update_fail_htlcs {
2804                                 node_b.node.handle_update_fail_htlc(&node_a.node.get_our_node_id(), &update_fail);
2805                         }
2806
2807                         if pending_htlc_adds.1 != -1 { // We use -1 to denote a response commitment_signed
2808                                 commitment_signed_dance!(node_b, node_a, commitment_update.commitment_signed, false);
2809                         } else {
2810                                 node_b.node.handle_commitment_signed(&node_a.node.get_our_node_id(), &commitment_update.commitment_signed);
2811                                 check_added_monitors!(node_b, 1);
2812                                 let bs_revoke_and_ack = get_event_msg!(node_b, MessageSendEvent::SendRevokeAndACK, node_a.node.get_our_node_id());
2813                                 // No commitment_signed so get_event_msg's assert(len == 1) passes
2814                                 node_a.node.handle_revoke_and_ack(&node_b.node.get_our_node_id(), &bs_revoke_and_ack);
2815                                 assert!(node_a.node.get_and_clear_pending_msg_events().is_empty());
2816                                 check_added_monitors!(node_a, 1);
2817                         }
2818                 } else {
2819                         assert!(chan_msgs.2.is_none());
2820                 }
2821         }
2822 }