git.bitcoin.ninja 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::BroadcastNodeAnnouncement { .. } => {
 625                         false
 626                 },
 627                 MessageSendEvent::SendChannelUpdate { node_id, .. } => {
 628                         node_id == msg_node_id
 629                 },
 630                 MessageSendEvent::HandleError { node_id, .. } => {
 631                         node_id == msg_node_id
 632                 },
 633                 MessageSendEvent::SendChannelRangeQuery { node_id, .. } => {
 634                         node_id == msg_node_id
 635                 },
 636                 MessageSendEvent::SendShortIdsQuery { node_id, .. } => {
 637                         node_id == msg_node_id
 638                 },
 639                 MessageSendEvent::SendReplyChannelRange { node_id, .. } => {
 640                         node_id == msg_node_id
 641                 },
 642                 MessageSendEvent::SendGossipTimestampFilter { node_id, .. } => {
 643                         node_id == msg_node_id
 644                 },
 645         }});
 646         if ev_index.is_some() {
 647                 let mut updated_msg_events = msg_events.to_vec();
 648                 let ev = updated_msg_events.remove(ev_index.unwrap());
 649                 (ev, updated_msg_events)
 650         } else {
 651                 panic!("Couldn't find any MessageSendEvent to the node!")
 652         }
 653 }
 654
 655 #[cfg(test)]
 656 macro_rules! get_channel_ref {
 657         ($node: expr, $counterparty_node: expr, $per_peer_state_lock: ident, $peer_state_lock: ident, $channel_id: expr) => {
 658                 {
 659                         $per_peer_state_lock = $node.node.per_peer_state.read().unwrap();
 660                         $peer_state_lock = $per_peer_state_lock.get(&$counterparty_node.node.get_our_node_id()).unwrap().lock().unwrap();
 661                         $peer_state_lock.channel_by_id.get_mut(&$channel_id).unwrap()
 662                 }
 663         }
 664 }
 665
 666 #[cfg(test)]
 667 macro_rules! get_feerate {
 668         ($node: expr, $counterparty_node: expr, $channel_id: expr) => {
 669                 {
 670                         let mut per_peer_state_lock;
 671                         let mut peer_state_lock;
 672                         let chan = get_channel_ref!($node, $counterparty_node, per_peer_state_lock, peer_state_lock, $channel_id);
 673                         chan.get_feerate()
 674                 }
 675         }
 676 }
 677
 678 #[cfg(test)]
 679 macro_rules! get_opt_anchors {
 680         ($node: expr, $counterparty_node: expr, $channel_id: expr) => {
 681                 {
 682                         let mut per_peer_state_lock;
 683                         let mut peer_state_lock;
 684                         let chan = get_channel_ref!($node, $counterparty_node, per_peer_state_lock, peer_state_lock, $channel_id);
 685                         chan.opt_anchors()
 686                 }
 687         }
 688 }
 689
 690 /// Returns a channel monitor given a channel id, making some naive assumptions
 691 #[macro_export]
 692 macro_rules! get_monitor {
 693         ($node: expr, $channel_id: expr) => {
 694                 {
 695                         use bitcoin::hashes::Hash;
 696                         let mut monitor = None;
 697                         // Assume funding vout is either 0 or 1 blindly
 698                         for index in 0..2 {
 699                                 if let Ok(mon) = $node.chain_monitor.chain_monitor.get_monitor(
 700                                         $crate::chain::transaction::OutPoint {
 701                                                 txid: bitcoin::Txid::from_slice(&$channel_id[..]).unwrap(), index
 702                                         })
 703                                 {
 704                                         monitor = Some(mon);
 705                                         break;
 706                                 }
 707                         }
 708                         monitor.unwrap()
 709                 }
 710         }
 711 }
 712
 713 /// Returns any local commitment transactions for the channel.
 714 #[macro_export]
 715 macro_rules! get_local_commitment_txn {
 716         ($node: expr, $channel_id: expr) => {
 717                 {
 718                         $crate::get_monitor!($node, $channel_id).unsafe_get_latest_holder_commitment_txn(&$node.logger)
 719                 }
 720         }
 721 }
 722
 723 /// Check the error from attempting a payment.
 724 #[macro_export]
 725 macro_rules! unwrap_send_err {
 726         ($res: expr, $all_failed: expr, $type: pat, $check: expr) => {
 727                 match &$res {
 728                         &Err(PaymentSendFailure::AllFailedResendSafe(ref fails)) if $all_failed => {
 729                                 assert_eq!(fails.len(), 1);
 730                                 match fails[0] {
 731                                         $type => { $check },
 732                                         _ => panic!(),
 733                                 }
 734                         },
 735                         &Err(PaymentSendFailure::PartialFailure { ref results, .. }) if !$all_failed => {
 736                                 assert_eq!(results.len(), 1);
 737                                 match results[0] {
 738                                         Err($type) => { $check },
 739                                         _ => panic!(),
 740                                 }
 741                         },
 742                         _ => panic!(),
 743                 }
 744         }
 745 }
 746
 747 /// Check whether N channel monitor(s) have been added.
 748 #[macro_export]
 749 macro_rules! check_added_monitors {
 750         ($node: expr, $count: expr) => {
 751                 {
 752                         let mut added_monitors = $node.chain_monitor.added_monitors.lock().unwrap();
 753                         assert_eq!(added_monitors.len(), $count);
 754                         added_monitors.clear();
 755                 }
 756         }
 757 }
 758
 759 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> {
 760         let mut monitors_read = Vec::with_capacity(monitors_encoded.len());
 761         for encoded in monitors_encoded {
 762                 let mut monitor_read = &encoded[..];
 763                 let (_, monitor) = <(BlockHash, ChannelMonitor<EnforcingSigner>)>
 764                         ::read(&mut monitor_read, (node.keys_manager, node.keys_manager)).unwrap();
 765                 assert!(monitor_read.is_empty());
 766                 monitors_read.push(monitor);
 767         }
 768
 769         let mut node_read = &chanman_encoded[..];
 770         let (_, node_deserialized) = {
 771                 let mut channel_monitors = HashMap::new();
 772                 for monitor in monitors_read.iter_mut() {
 773                         assert!(channel_monitors.insert(monitor.get_funding_txo().0, monitor).is_none());
 774                 }
 775                 <(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 {
 776                         default_config,
 777                         entropy_source: node.keys_manager,
 778                         node_signer: node.keys_manager,
 779                         signer_provider: node.keys_manager,
 780                         fee_estimator: node.fee_estimator,
 781                         router: node.router,
 782                         chain_monitor: node.chain_monitor,
 783                         tx_broadcaster: node.tx_broadcaster,
 784                         logger: node.logger,
 785                         channel_monitors,
 786                 }).unwrap()
 787         };
 788         assert!(node_read.is_empty());
 789
 790         for monitor in monitors_read.drain(..) {
 791                 assert_eq!(node.chain_monitor.watch_channel(monitor.get_funding_txo().0, monitor),
 792                         ChannelMonitorUpdateStatus::Completed);
 793                 check_added_monitors!(node, 1);
 794         }
 795
 796         node_deserialized
 797 }
 798
 799 #[cfg(test)]
 800 macro_rules! reload_node {
 801         ($node: expr, $new_config: expr, $chanman_encoded: expr, $monitors_encoded: expr, $persister: ident, $new_chain_monitor: ident, $new_channelmanager: ident) => {
 802                 let chanman_encoded = $chanman_encoded;
 803
 804                 $persister = test_utils::TestPersister::new();
 805                 $new_chain_monitor = test_utils::TestChainMonitor::new(Some($node.chain_source), $node.tx_broadcaster.clone(), $node.logger, $node.fee_estimator, &$persister, &$node.keys_manager);
 806                 $node.chain_monitor = &$new_chain_monitor;
 807
 808                 $new_channelmanager = _reload_node(&$node, $new_config, &chanman_encoded, $monitors_encoded);
 809                 $node.node = &$new_channelmanager;
 810         };
 811         ($node: expr, $chanman_encoded: expr, $monitors_encoded: expr, $persister: ident, $new_chain_monitor: ident, $new_channelmanager: ident) => {
 812                 reload_node!($node, $crate::util::config::UserConfig::default(), $chanman_encoded, $monitors_encoded, $persister, $new_chain_monitor, $new_channelmanager);
 813         };
 814 }
 815
 816 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) {
 817         let chan_id = *node.network_chan_count.borrow();
 818
 819         let events = node.node.get_and_clear_pending_events();
 820         assert_eq!(events.len(), 1);
 821         match events[0] {
 822                 Event::FundingGenerationReady { ref temporary_channel_id, ref counterparty_node_id, ref channel_value_satoshis, ref output_script, user_channel_id } => {
 823                         assert_eq!(counterparty_node_id, expected_counterparty_node_id);
 824                         assert_eq!(*channel_value_satoshis, expected_chan_value);
 825                         assert_eq!(user_channel_id, expected_user_chan_id);
 826
 827                         let tx = Transaction { version: chan_id as i32, lock_time: PackedLockTime::ZERO, input: Vec::new(), output: vec![TxOut {
 828                                 value: *channel_value_satoshis, script_pubkey: output_script.clone(),
 829                         }]};
 830                         let funding_outpoint = OutPoint { txid: tx.txid(), index: 0 };
 831                         (*temporary_channel_id, tx, funding_outpoint)
 832                 },
 833                 _ => panic!("Unexpected event"),
 834         }
 835 }
 836 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 {
 837         let (temporary_channel_id, tx, funding_output) = create_funding_transaction(node_a, &node_b.node.get_our_node_id(), channel_value, 42);
 838         assert_eq!(temporary_channel_id, expected_temporary_channel_id);
 839
 840         assert!(node_a.node.funding_transaction_generated(&temporary_channel_id, &node_b.node.get_our_node_id(), tx.clone()).is_ok());
 841         check_added_monitors!(node_a, 0);
 842
 843         let funding_created_msg = get_event_msg!(node_a, MessageSendEvent::SendFundingCreated, node_b.node.get_our_node_id());
 844         assert_eq!(funding_created_msg.temporary_channel_id, expected_temporary_channel_id);
 845         node_b.node.handle_funding_created(&node_a.node.get_our_node_id(), &funding_created_msg);
 846         {
 847                 let mut added_monitors = node_b.chain_monitor.added_monitors.lock().unwrap();
 848                 assert_eq!(added_monitors.len(), 1);
 849                 assert_eq!(added_monitors[0].0, funding_output);
 850                 added_monitors.clear();
 851         }
 852
 853         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()));
 854         {
 855                 let mut added_monitors = node_a.chain_monitor.added_monitors.lock().unwrap();
 856                 assert_eq!(added_monitors.len(), 1);
 857                 assert_eq!(added_monitors[0].0, funding_output);
 858                 added_monitors.clear();
 859         }
 860
 861         let events_4 = node_a.node.get_and_clear_pending_events();
 862         assert_eq!(events_4.len(), 0);
 863
 864         assert_eq!(node_a.tx_broadcaster.txn_broadcasted.lock().unwrap().len(), 1);
 865         assert_eq!(node_a.tx_broadcaster.txn_broadcasted.lock().unwrap()[0], tx);
 866         node_a.tx_broadcaster.txn_broadcasted.lock().unwrap().clear();
 867
 868         // Ensure that funding_transaction_generated is idempotent.
 869         assert!(node_a.node.funding_transaction_generated(&temporary_channel_id, &node_b.node.get_our_node_id(), tx.clone()).is_err());
 870         assert!(node_a.node.get_and_clear_pending_msg_events().is_empty());
 871         check_added_monitors!(node_a, 0);
 872
 873         tx
 874 }
 875
 876 // Receiver must have been initialized with manually_accept_inbound_channels set to true.
 877 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]) {
 878         let initiator_channels = initiator.node.list_usable_channels().len();
 879         let receiver_channels = receiver.node.list_usable_channels().len();
 880
 881         initiator.node.create_channel(receiver.node.get_our_node_id(), 100_000, 10_001, 42, initiator_config).unwrap();
 882         let open_channel = get_event_msg!(initiator, MessageSendEvent::SendOpenChannel, receiver.node.get_our_node_id());
 883
 884         receiver.node.handle_open_channel(&initiator.node.get_our_node_id(), &open_channel);
 885         let events = receiver.node.get_and_clear_pending_events();
 886         assert_eq!(events.len(), 1);
 887         match events[0] {
 888                 Event::OpenChannelRequest { temporary_channel_id, .. } => {
 889                         receiver.node.accept_inbound_channel_from_trusted_peer_0conf(&temporary_channel_id, &initiator.node.get_our_node_id(), 0).unwrap();
 890                 },
 891                 _ => panic!("Unexpected event"),
 892         };
 893
 894         let accept_channel = get_event_msg!(receiver, MessageSendEvent::SendAcceptChannel, initiator.node.get_our_node_id());
 895         assert_eq!(accept_channel.minimum_depth, 0);
 896         initiator.node.handle_accept_channel(&receiver.node.get_our_node_id(), &accept_channel);
 897
 898         let (temporary_channel_id, tx, _) = create_funding_transaction(&initiator, &receiver.node.get_our_node_id(), 100_000, 42);
 899         initiator.node.funding_transaction_generated(&temporary_channel_id, &receiver.node.get_our_node_id(), tx.clone()).unwrap();
 900         let funding_created = get_event_msg!(initiator, MessageSendEvent::SendFundingCreated, receiver.node.get_our_node_id());
 901
 902         receiver.node.handle_funding_created(&initiator.node.get_our_node_id(), &funding_created);
 903         check_added_monitors!(receiver, 1);
 904         let bs_signed_locked = receiver.node.get_and_clear_pending_msg_events();
 905         assert_eq!(bs_signed_locked.len(), 2);
 906         let as_channel_ready;
 907         match &bs_signed_locked[0] {
 908                 MessageSendEvent::SendFundingSigned { node_id, msg } => {
 909                         assert_eq!(*node_id, initiator.node.get_our_node_id());
 910                         initiator.node.handle_funding_signed(&receiver.node.get_our_node_id(), &msg);
 911                         check_added_monitors!(initiator, 1);
 912
 913                         assert_eq!(initiator.tx_broadcaster.txn_broadcasted.lock().unwrap().len(), 1);
 914                         assert_eq!(initiator.tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0)[0], tx);
 915
 916                         as_channel_ready = get_event_msg!(initiator, MessageSendEvent::SendChannelReady, receiver.node.get_our_node_id());
 917                 }
 918                 _ => panic!("Unexpected event"),
 919         }
 920         match &bs_signed_locked[1] {
 921                 MessageSendEvent::SendChannelReady { node_id, msg } => {
 922                         assert_eq!(*node_id, initiator.node.get_our_node_id());
 923                         initiator.node.handle_channel_ready(&receiver.node.get_our_node_id(), &msg);
 924                 }
 925                 _ => panic!("Unexpected event"),
 926         }
 927
 928         receiver.node.handle_channel_ready(&initiator.node.get_our_node_id(), &as_channel_ready);
 929
 930         let as_channel_update = get_event_msg!(initiator, MessageSendEvent::SendChannelUpdate, receiver.node.get_our_node_id());
 931         let bs_channel_update = get_event_msg!(receiver, MessageSendEvent::SendChannelUpdate, initiator.node.get_our_node_id());
 932
 933         initiator.node.handle_channel_update(&receiver.node.get_our_node_id(), &bs_channel_update);
 934         receiver.node.handle_channel_update(&initiator.node.get_our_node_id(), &as_channel_update);
 935
 936         assert_eq!(initiator.node.list_usable_channels().len(), initiator_channels + 1);
 937         assert_eq!(receiver.node.list_usable_channels().len(), receiver_channels + 1);
 938
 939         expect_channel_ready_event(&initiator, &receiver.node.get_our_node_id());
 940         expect_channel_ready_event(&receiver, &initiator.node.get_our_node_id());
 941
 942         (tx, as_channel_ready.channel_id)
 943 }
 944
 945 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 {
 946         let create_chan_id = node_a.node.create_channel(node_b.node.get_our_node_id(), channel_value, push_msat, 42, None).unwrap();
 947         let open_channel_msg = get_event_msg!(node_a, MessageSendEvent::SendOpenChannel, node_b.node.get_our_node_id());
 948         assert_eq!(open_channel_msg.temporary_channel_id, create_chan_id);
 949         assert_eq!(node_a.node.list_channels().iter().find(|channel| channel.channel_id == create_chan_id).unwrap().user_channel_id, 42);
 950         node_b.node.handle_open_channel(&node_a.node.get_our_node_id(), &open_channel_msg);
 951         let accept_channel_msg = get_event_msg!(node_b, MessageSendEvent::SendAcceptChannel, node_a.node.get_our_node_id());
 952         assert_eq!(accept_channel_msg.temporary_channel_id, create_chan_id);
 953         node_a.node.handle_accept_channel(&node_b.node.get_our_node_id(), &accept_channel_msg);
 954         assert_ne!(node_b.node.list_channels().iter().find(|channel| channel.channel_id == create_chan_id).unwrap().user_channel_id, 0);
 955
 956         sign_funding_transaction(node_a, node_b, channel_value, create_chan_id)
 957 }
 958
 959 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) {
 960         confirm_transaction_at(node_conf, tx, conf_height);
 961         connect_blocks(node_conf, CHAN_CONFIRM_DEPTH - 1);
 962         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()));
 963 }
 964
 965 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]) {
 966         let channel_id;
 967         let events_6 = node_conf.node.get_and_clear_pending_msg_events();
 968         assert_eq!(events_6.len(), 3);
 969         let announcement_sigs_idx = if let MessageSendEvent::SendChannelUpdate { ref node_id, msg: _ } = events_6[1] {
 970                 assert_eq!(*node_id, node_recv.node.get_our_node_id());
 971                 2
 972         } else if let MessageSendEvent::SendChannelUpdate { ref node_id, msg: _ } = events_6[2] {
 973                 assert_eq!(*node_id, node_recv.node.get_our_node_id());
 974                 1
 975         } else { panic!("Unexpected event: {:?}", events_6[1]); };
 976         ((match events_6[0] {
 977                 MessageSendEvent::SendChannelReady { ref node_id, ref msg } => {
 978                         channel_id = msg.channel_id.clone();
 979                         assert_eq!(*node_id, node_recv.node.get_our_node_id());
 980                         msg.clone()
 981                 },
 982                 _ => panic!("Unexpected event"),
 983         }, match events_6[announcement_sigs_idx] {
 984                 MessageSendEvent::SendAnnouncementSignatures { ref node_id, ref msg } => {
 985                         assert_eq!(*node_id, node_recv.node.get_our_node_id());
 986                         msg.clone()
 987                 },
 988                 _ => panic!("Unexpected event"),
 989         }), channel_id)
 990 }
 991
 992 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]) {
 993         let conf_height = core::cmp::max(node_a.best_block_info().1 + 1, node_b.best_block_info().1 + 1);
 994         create_chan_between_nodes_with_value_confirm_first(node_a, node_b, tx, conf_height);
 995         confirm_transaction_at(node_a, tx, conf_height);
 996         connect_blocks(node_a, CHAN_CONFIRM_DEPTH - 1);
 997         expect_channel_ready_event(&node_a, &node_b.node.get_our_node_id());
 998         create_chan_between_nodes_with_value_confirm_second(node_b, node_a)
 999 }
1000
1001 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) {
1002         let tx = create_chan_between_nodes_with_value_init(node_a, node_b, channel_value, push_msat);
1003         let (msgs, chan_id) = create_chan_between_nodes_with_value_confirm(node_a, node_b, &tx);
1004         (msgs, chan_id, tx)
1005 }
1006
1007 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) {
1008         node_b.node.handle_channel_ready(&node_a.node.get_our_node_id(), &as_funding_msgs.0);
1009         let bs_announcement_sigs = get_event_msg!(node_b, MessageSendEvent::SendAnnouncementSignatures, node_a.node.get_our_node_id());
1010         node_b.node.handle_announcement_signatures(&node_a.node.get_our_node_id(), &as_funding_msgs.1);
1011
1012         let events_7 = node_b.node.get_and_clear_pending_msg_events();
1013         assert_eq!(events_7.len(), 1);
1014         let (announcement, bs_update) = match events_7[0] {
1015                 MessageSendEvent::BroadcastChannelAnnouncement { ref msg, ref update_msg } => {
1016                         (msg, update_msg.clone().unwrap())
1017                 },
1018                 _ => panic!("Unexpected event"),
1019         };
1020
1021         node_a.node.handle_announcement_signatures(&node_b.node.get_our_node_id(), &bs_announcement_sigs);
1022         let events_8 = node_a.node.get_and_clear_pending_msg_events();
1023         assert_eq!(events_8.len(), 1);
1024         let as_update = match events_8[0] {
1025                 MessageSendEvent::BroadcastChannelAnnouncement { ref msg, ref update_msg } => {
1026                         assert!(*announcement == *msg);
1027                         let update_msg = update_msg.clone().unwrap();
1028                         assert_eq!(update_msg.contents.short_channel_id, announcement.contents.short_channel_id);
1029                         assert_eq!(update_msg.contents.short_channel_id, bs_update.contents.short_channel_id);
1030                         update_msg
1031                 },
1032                 _ => panic!("Unexpected event"),
1033         };
1034
1035         *node_a.network_chan_count.borrow_mut() += 1;
1036
1037         expect_channel_ready_event(&node_b, &node_a.node.get_our_node_id());
1038         ((*announcement).clone(), as_update, bs_update)
1039 }
1040
1041 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) {
1042         create_announced_chan_between_nodes_with_value(nodes, a, b, 100000, 10001)
1043 }
1044
1045 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) {
1046         let chan_announcement = create_chan_between_nodes_with_value(&nodes[a], &nodes[b], channel_value, push_msat);
1047         update_nodes_with_chan_announce(nodes, a, b, &chan_announcement.0, &chan_announcement.1, &chan_announcement.2);
1048         (chan_announcement.1, chan_announcement.2, chan_announcement.3, chan_announcement.4)
1049 }
1050
1051 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) {
1052         let mut no_announce_cfg = test_default_channel_config();
1053         no_announce_cfg.channel_handshake_config.announced_channel = false;
1054         nodes[a].node.create_channel(nodes[b].node.get_our_node_id(), channel_value, push_msat, 42, Some(no_announce_cfg)).unwrap();
1055         let open_channel = get_event_msg!(nodes[a], MessageSendEvent::SendOpenChannel, nodes[b].node.get_our_node_id());
1056         nodes[b].node.handle_open_channel(&nodes[a].node.get_our_node_id(), &open_channel);
1057         let accept_channel = get_event_msg!(nodes[b], MessageSendEvent::SendAcceptChannel, nodes[a].node.get_our_node_id());
1058         nodes[a].node.handle_accept_channel(&nodes[b].node.get_our_node_id(), &accept_channel);
1059
1060         let (temporary_channel_id, tx, _) = create_funding_transaction(&nodes[a], &nodes[b].node.get_our_node_id(), channel_value, 42);
1061         nodes[a].node.funding_transaction_generated(&temporary_channel_id, &nodes[b].node.get_our_node_id(), tx.clone()).unwrap();
1062         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()));
1063         check_added_monitors!(nodes[b], 1);
1064
1065         let cs_funding_signed = get_event_msg!(nodes[b], MessageSendEvent::SendFundingSigned, nodes[a].node.get_our_node_id());
1066         nodes[a].node.handle_funding_signed(&nodes[b].node.get_our_node_id(), &cs_funding_signed);
1067         check_added_monitors!(nodes[a], 1);
1068
1069         let conf_height = core::cmp::max(nodes[a].best_block_info().1 + 1, nodes[b].best_block_info().1 + 1);
1070         confirm_transaction_at(&nodes[a], &tx, conf_height);
1071         connect_blocks(&nodes[a], CHAN_CONFIRM_DEPTH - 1);
1072         confirm_transaction_at(&nodes[b], &tx, conf_height);
1073         connect_blocks(&nodes[b], CHAN_CONFIRM_DEPTH - 1);
1074         let as_channel_ready = get_event_msg!(nodes[a], MessageSendEvent::SendChannelReady, nodes[b].node.get_our_node_id());
1075         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()));
1076         expect_channel_ready_event(&nodes[a], &nodes[b].node.get_our_node_id());
1077         let as_update = get_event_msg!(nodes[a], MessageSendEvent::SendChannelUpdate, nodes[b].node.get_our_node_id());
1078         nodes[b].node.handle_channel_ready(&nodes[a].node.get_our_node_id(), &as_channel_ready);
1079         expect_channel_ready_event(&nodes[b], &nodes[a].node.get_our_node_id());
1080         let bs_update = get_event_msg!(nodes[b], MessageSendEvent::SendChannelUpdate, nodes[a].node.get_our_node_id());
1081
1082         nodes[a].node.handle_channel_update(&nodes[b].node.get_our_node_id(), &bs_update);
1083         nodes[b].node.handle_channel_update(&nodes[a].node.get_our_node_id(), &as_update);
1084
1085         let mut found_a = false;
1086         for chan in nodes[a].node.list_usable_channels() {
1087                 if chan.channel_id == as_channel_ready.channel_id {
1088                         assert!(!found_a);
1089                         found_a = true;
1090                         assert!(!chan.is_public);
1091                 }
1092         }
1093         assert!(found_a);
1094
1095         let mut found_b = false;
1096         for chan in nodes[b].node.list_usable_channels() {
1097                 if chan.channel_id == as_channel_ready.channel_id {
1098                         assert!(!found_b);
1099                         found_b = true;
1100                         assert!(!chan.is_public);
1101                 }
1102         }
1103         assert!(found_b);
1104
1105         (as_channel_ready, tx)
1106 }
1107
1108 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) {
1109         for node in nodes {
1110                 assert!(node.gossip_sync.handle_channel_announcement(ann).unwrap());
1111                 node.gossip_sync.handle_channel_update(upd_1).unwrap();
1112                 node.gossip_sync.handle_channel_update(upd_2).unwrap();
1113
1114                 // Note that channel_updates are also delivered to ChannelManagers to ensure we have
1115                 // forwarding info for local channels even if its not accepted in the network graph.
1116                 node.node.handle_channel_update(&nodes[a].node.get_our_node_id(), &upd_1);
1117                 node.node.handle_channel_update(&nodes[b].node.get_our_node_id(), &upd_2);
1118         }
1119 }
1120
1121 #[macro_export]
1122 macro_rules! check_spends {
1123         ($tx: expr, $($spends_txn: expr),*) => {
1124                 {
1125                         $(
1126                         for outp in $spends_txn.output.iter() {
1127                                 assert!(outp.value >= outp.script_pubkey.dust_value().to_sat(), "Input tx output didn't meet dust limit");
1128                         }
1129                         )*
1130                         for outp in $tx.output.iter() {
1131                                 assert!(outp.value >= outp.script_pubkey.dust_value().to_sat(), "Spending tx output didn't meet dust limit");
1132                         }
1133                         let get_output = |out_point: &bitcoin::blockdata::transaction::OutPoint| {
1134                                 $(
1135                                         if out_point.txid == $spends_txn.txid() {
1136                                                 return $spends_txn.output.get(out_point.vout as usize).cloned()
1137                                         }
1138                                 )*
1139                                 None
1140                         };
1141                         let mut total_value_in = 0;
1142                         for input in $tx.input.iter() {
1143                                 total_value_in += get_output(&input.previous_output).unwrap().value;
1144                         }
1145                         let mut total_value_out = 0;
1146                         for output in $tx.output.iter() {
1147                                 total_value_out += output.value;
1148                         }
1149                         let min_fee = ($tx.weight() as u64 + 3) / 4; // One sat per vbyte (ie per weight/4, rounded up)
1150                         // Input amount - output amount = fee, so check that out + min_fee is smaller than input
1151                         assert!(total_value_out + min_fee <= total_value_in);
1152                         $tx.verify(get_output).unwrap();
1153                 }
1154         }
1155 }
1156
1157 macro_rules! get_closing_signed_broadcast {
1158         ($node: expr, $dest_pubkey: expr) => {
1159                 {
1160                         let events = $node.get_and_clear_pending_msg_events();
1161                         assert!(events.len() == 1 || events.len() == 2);
1162                         (match events[events.len() - 1] {
1163                                 MessageSendEvent::BroadcastChannelUpdate { ref msg } => {
1164                                         assert_eq!(msg.contents.flags & 2, 2);
1165                                         msg.clone()
1166                                 },
1167                                 _ => panic!("Unexpected event"),
1168                         }, if events.len() == 2 {
1169                                 match events[0] {
1170                                         MessageSendEvent::SendClosingSigned { ref node_id, ref msg } => {
1171                                                 assert_eq!(*node_id, $dest_pubkey);
1172                                                 Some(msg.clone())
1173                                         },
1174                                         _ => panic!("Unexpected event"),
1175                                 }
1176                         } else { None })
1177                 }
1178         }
1179 }
1180
1181 #[cfg(test)]
1182 macro_rules! check_warn_msg {
1183         ($node: expr, $recipient_node_id: expr, $chan_id: expr) => {{
1184                 let msg_events = $node.node.get_and_clear_pending_msg_events();
1185                 assert_eq!(msg_events.len(), 1);
1186                 match msg_events[0] {
1187                         MessageSendEvent::HandleError { action: ErrorAction::SendWarningMessage { ref msg, log_level: _ }, node_id } => {
1188                                 assert_eq!(node_id, $recipient_node_id);
1189                                 assert_eq!(msg.channel_id, $chan_id);
1190                                 msg.data.clone()
1191                         },
1192                         _ => panic!("Unexpected event"),
1193                 }
1194         }}
1195 }
1196
1197 /// Check that a channel's closing channel update has been broadcasted, and optionally
1198 /// check whether an error message event has occurred.
1199 #[macro_export]
1200 macro_rules! check_closed_broadcast {
1201         ($node: expr, $with_error_msg: expr) => {{
1202                 use $crate::util::events::MessageSendEvent;
1203                 use $crate::ln::msgs::ErrorAction;
1204
1205                 let msg_events = $node.node.get_and_clear_pending_msg_events();
1206                 assert_eq!(msg_events.len(), if $with_error_msg { 2 } else { 1 });
1207                 match msg_events[0] {
1208                         MessageSendEvent::BroadcastChannelUpdate { ref msg } => {
1209                                 assert_eq!(msg.contents.flags & 2, 2);
1210                         },
1211                         _ => panic!("Unexpected event"),
1212                 }
1213                 if $with_error_msg {
1214                         match msg_events[1] {
1215                                 MessageSendEvent::HandleError { action: ErrorAction::SendErrorMessage { ref msg }, node_id: _ } => {
1216                                         // TODO: Check node_id
1217                                         Some(msg.clone())
1218                                 },
1219                                 _ => panic!("Unexpected event"),
1220                         }
1221                 } else { None }
1222         }}
1223 }
1224
1225 /// Check that a channel's closing channel events has been issued
1226 #[macro_export]
1227 macro_rules! check_closed_event {
1228         ($node: expr, $events: expr, $reason: expr) => {
1229                 check_closed_event!($node, $events, $reason, false);
1230         };
1231         ($node: expr, $events: expr, $reason: expr, $is_check_discard_funding: expr) => {{
1232                 use $crate::util::events::Event;
1233
1234                 let events = $node.node.get_and_clear_pending_events();
1235                 assert_eq!(events.len(), $events, "{:?}", events);
1236                 let expected_reason = $reason;
1237                 let mut issues_discard_funding = false;
1238                 for event in events {
1239                         match event {
1240                                 Event::ChannelClosed { ref reason, .. } => {
1241                                         assert_eq!(*reason, expected_reason);
1242                                 },
1243                                 Event::DiscardFunding { .. } => {
1244                                         issues_discard_funding = true;
1245                                 }
1246                                 _ => panic!("Unexpected event"),
1247                         }
1248                 }
1249                 assert_eq!($is_check_discard_funding, issues_discard_funding);
1250         }}
1251 }
1252
1253 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) {
1254         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) };
1255         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) };
1256         let (tx_a, tx_b);
1257
1258         node_a.close_channel(channel_id, &node_b.get_our_node_id()).unwrap();
1259         node_b.handle_shutdown(&node_a.get_our_node_id(), &get_event_msg!(struct_a, MessageSendEvent::SendShutdown, node_b.get_our_node_id()));
1260
1261         let events_1 = node_b.get_and_clear_pending_msg_events();
1262         assert!(events_1.len() >= 1);
1263         let shutdown_b = match events_1[0] {
1264                 MessageSendEvent::SendShutdown { ref node_id, ref msg } => {
1265                         assert_eq!(node_id, &node_a.get_our_node_id());
1266                         msg.clone()
1267                 },
1268                 _ => panic!("Unexpected event"),
1269         };
1270
1271         let closing_signed_b = if !close_inbound_first {
1272                 assert_eq!(events_1.len(), 1);
1273                 None
1274         } else {
1275                 Some(match events_1[1] {
1276                         MessageSendEvent::SendClosingSigned { ref node_id, ref msg } => {
1277                                 assert_eq!(node_id, &node_a.get_our_node_id());
1278                                 msg.clone()
1279                         },
1280                         _ => panic!("Unexpected event"),
1281                 })
1282         };
1283
1284         node_a.handle_shutdown(&node_b.get_our_node_id(), &shutdown_b);
1285         let (as_update, bs_update) = if close_inbound_first {
1286                 assert!(node_a.get_and_clear_pending_msg_events().is_empty());
1287                 node_a.handle_closing_signed(&node_b.get_our_node_id(), &closing_signed_b.unwrap());
1288
1289                 node_b.handle_closing_signed(&node_a.get_our_node_id(), &get_event_msg!(struct_a, MessageSendEvent::SendClosingSigned, node_b.get_our_node_id()));
1290                 assert_eq!(broadcaster_b.txn_broadcasted.lock().unwrap().len(), 1);
1291                 tx_b = broadcaster_b.txn_broadcasted.lock().unwrap().remove(0);
1292                 let (bs_update, closing_signed_b) = get_closing_signed_broadcast!(node_b, node_a.get_our_node_id());
1293
1294                 node_a.handle_closing_signed(&node_b.get_our_node_id(), &closing_signed_b.unwrap());
1295                 let (as_update, none_a) = get_closing_signed_broadcast!(node_a, node_b.get_our_node_id());
1296                 assert!(none_a.is_none());
1297                 assert_eq!(broadcaster_a.txn_broadcasted.lock().unwrap().len(), 1);
1298                 tx_a = broadcaster_a.txn_broadcasted.lock().unwrap().remove(0);
1299                 (as_update, bs_update)
1300         } else {
1301                 let closing_signed_a = get_event_msg!(struct_a, MessageSendEvent::SendClosingSigned, node_b.get_our_node_id());
1302
1303                 node_b.handle_closing_signed(&node_a.get_our_node_id(), &closing_signed_a);
1304                 node_a.handle_closing_signed(&node_b.get_our_node_id(), &get_event_msg!(struct_b, MessageSendEvent::SendClosingSigned, node_a.get_our_node_id()));
1305
1306                 assert_eq!(broadcaster_a.txn_broadcasted.lock().unwrap().len(), 1);
1307                 tx_a = broadcaster_a.txn_broadcasted.lock().unwrap().remove(0);
1308                 let (as_update, closing_signed_a) = get_closing_signed_broadcast!(node_a, node_b.get_our_node_id());
1309
1310                 node_b.handle_closing_signed(&node_a.get_our_node_id(), &closing_signed_a.unwrap());
1311                 let (bs_update, none_b) = get_closing_signed_broadcast!(node_b, node_a.get_our_node_id());
1312                 assert!(none_b.is_none());
1313                 assert_eq!(broadcaster_b.txn_broadcasted.lock().unwrap().len(), 1);
1314                 tx_b = broadcaster_b.txn_broadcasted.lock().unwrap().remove(0);
1315                 (as_update, bs_update)
1316         };
1317         assert_eq!(tx_a, tx_b);
1318         check_spends!(tx_a, funding_tx);
1319
1320         (as_update, bs_update, tx_a)
1321 }
1322
1323 pub struct SendEvent {
1324         pub node_id: PublicKey,
1325         pub msgs: Vec<msgs::UpdateAddHTLC>,
1326         pub commitment_msg: msgs::CommitmentSigned,
1327 }
1328 impl SendEvent {
1329         pub fn from_commitment_update(node_id: PublicKey, updates: msgs::CommitmentUpdate) -> SendEvent {
1330                 assert!(updates.update_fulfill_htlcs.is_empty());
1331                 assert!(updates.update_fail_htlcs.is_empty());
1332                 assert!(updates.update_fail_malformed_htlcs.is_empty());
1333                 assert!(updates.update_fee.is_none());
1334                 SendEvent { node_id, msgs: updates.update_add_htlcs, commitment_msg: updates.commitment_signed }
1335         }
1336
1337         pub fn from_event(event: MessageSendEvent) -> SendEvent {
1338                 match event {
1339                         MessageSendEvent::UpdateHTLCs { node_id, updates } => SendEvent::from_commitment_update(node_id, updates),
1340                         _ => panic!("Unexpected event type!"),
1341                 }
1342         }
1343
1344         pub fn from_node<'a, 'b, 'c>(node: &Node<'a, 'b, 'c>) -> SendEvent {
1345                 let mut events = node.node.get_and_clear_pending_msg_events();
1346                 assert_eq!(events.len(), 1);
1347                 SendEvent::from_event(events.pop().unwrap())
1348         }
1349 }
1350
1351 #[macro_export]
1352 macro_rules! expect_pending_htlcs_forwardable_conditions {
1353         ($node: expr, $expected_failures: expr) => {{
1354                 let expected_failures = $expected_failures;
1355                 let events = $node.node.get_and_clear_pending_events();
1356                 match events[0] {
1357                         $crate::util::events::Event::PendingHTLCsForwardable { .. } => { },
1358                         _ => panic!("Unexpected event {:?}", events),
1359                 };
1360
1361                 let count = expected_failures.len() + 1;
1362                 assert_eq!(events.len(), count);
1363
1364                 if expected_failures.len() > 0 {
1365                         expect_htlc_handling_failed_destinations!(events, expected_failures)
1366                 }
1367         }}
1368 }
1369
1370 #[macro_export]
1371 macro_rules! expect_htlc_handling_failed_destinations {
1372         ($events: expr, $expected_failures: expr) => {{
1373                 for event in $events {
1374                         match event {
1375                                 $crate::util::events::Event::PendingHTLCsForwardable { .. } => { },
1376                                 $crate::util::events::Event::HTLCHandlingFailed { ref failed_next_destination, .. } => {
1377                                         assert!($expected_failures.contains(&failed_next_destination))
1378                                 },
1379                                 _ => panic!("Unexpected destination"),
1380                         }
1381                 }
1382         }}
1383 }
1384
1385 #[macro_export]
1386 /// Clears (and ignores) a PendingHTLCsForwardable event
1387 macro_rules! expect_pending_htlcs_forwardable_ignore {
1388         ($node: expr) => {{
1389                 expect_pending_htlcs_forwardable_conditions!($node, vec![]);
1390         }};
1391 }
1392
1393 #[macro_export]
1394 /// Clears (and ignores) PendingHTLCsForwardable and HTLCHandlingFailed events
1395 macro_rules! expect_pending_htlcs_forwardable_and_htlc_handling_failed_ignore {
1396         ($node: expr, $expected_failures: expr) => {{
1397                 expect_pending_htlcs_forwardable_conditions!($node, $expected_failures);
1398         }};
1399 }
1400
1401 #[macro_export]
1402 /// Handles a PendingHTLCsForwardable event
1403 macro_rules! expect_pending_htlcs_forwardable {
1404         ($node: expr) => {{
1405                 expect_pending_htlcs_forwardable_ignore!($node);
1406                 $node.node.process_pending_htlc_forwards();
1407
1408                 // Ensure process_pending_htlc_forwards is idempotent.
1409                 $node.node.process_pending_htlc_forwards();
1410         }};
1411 }
1412
1413 #[macro_export]
1414 /// Handles a PendingHTLCsForwardable and HTLCHandlingFailed event
1415 macro_rules! expect_pending_htlcs_forwardable_and_htlc_handling_failed {
1416         ($node: expr, $expected_failures: expr) => {{
1417                 expect_pending_htlcs_forwardable_and_htlc_handling_failed_ignore!($node, $expected_failures);
1418                 $node.node.process_pending_htlc_forwards();
1419
1420                 // Ensure process_pending_htlc_forwards is idempotent.
1421                 $node.node.process_pending_htlc_forwards();
1422         }}
1423 }
1424
1425 #[cfg(test)]
1426 macro_rules! expect_pending_htlcs_forwardable_from_events {
1427         ($node: expr, $events: expr, $ignore: expr) => {{
1428                 assert_eq!($events.len(), 1);
1429                 match $events[0] {
1430                         Event::PendingHTLCsForwardable { .. } => { },
1431                         _ => panic!("Unexpected event"),
1432                 };
1433                 if $ignore {
1434                         $node.node.process_pending_htlc_forwards();
1435
1436                         // Ensure process_pending_htlc_forwards is idempotent.
1437                         $node.node.process_pending_htlc_forwards();
1438                 }
1439         }}
1440 }
1441
1442 #[macro_export]
1443 /// Performs the "commitment signed dance" - the series of message exchanges which occur after a
1444 /// commitment update.
1445 macro_rules! commitment_signed_dance {
1446         ($node_a: expr, $node_b: expr, $commitment_signed: expr, $fail_backwards: expr, true /* skip last step */) => {
1447                 $crate::ln::functional_test_utils::do_commitment_signed_dance(&$node_a, &$node_b, &$commitment_signed, $fail_backwards, true);
1448         };
1449         ($node_a: expr, $node_b: expr, (), $fail_backwards: expr, true /* skip last step */, true /* return extra message */, true /* return last RAA */) => {
1450                 $crate::ln::functional_test_utils::do_main_commitment_signed_dance(&$node_a, &$node_b, $fail_backwards)
1451         };
1452         ($node_a: expr, $node_b: expr, $commitment_signed: expr, $fail_backwards: expr, true /* skip last step */, false /* return extra message */, true /* return last RAA */) => {
1453                 {
1454                         check_added_monitors!($node_a, 0);
1455                         assert!($node_a.node.get_and_clear_pending_msg_events().is_empty());
1456                         $node_a.node.handle_commitment_signed(&$node_b.node.get_our_node_id(), &$commitment_signed);
1457                         check_added_monitors!($node_a, 1);
1458                         let (extra_msg_option, bs_revoke_and_ack) = $crate::ln::functional_test_utils::do_main_commitment_signed_dance(&$node_a, &$node_b, $fail_backwards);
1459                         assert!(extra_msg_option.is_none());
1460                         bs_revoke_and_ack
1461                 }
1462         };
1463         ($node_a: expr, $node_b: expr, (), $fail_backwards: expr, true /* skip last step */, true /* return extra message */) => {
1464                 {
1465                         let (extra_msg_option, bs_revoke_and_ack) = $crate::ln::functional_test_utils::do_main_commitment_signed_dance(&$node_a, &$node_b, $fail_backwards);
1466                         $node_a.node.handle_revoke_and_ack(&$node_b.node.get_our_node_id(), &bs_revoke_and_ack);
1467                         check_added_monitors!($node_a, 1);
1468                         extra_msg_option
1469                 }
1470         };
1471         ($node_a: expr, $node_b: expr, (), $fail_backwards: expr, true /* skip last step */, false /* no extra message */) => {
1472                 assert!(commitment_signed_dance!($node_a, $node_b, (), $fail_backwards, true, true).is_none());
1473         };
1474         ($node_a: expr, $node_b: expr, $commitment_signed: expr, $fail_backwards: expr) => {
1475                 $crate::ln::functional_test_utils::do_commitment_signed_dance(&$node_a, &$node_b, &$commitment_signed, $fail_backwards, false);
1476         }
1477 }
1478
1479
1480 pub fn do_main_commitment_signed_dance(node_a: &Node<'_, '_, '_>, node_b: &Node<'_, '_, '_>, fail_backwards: bool) -> (Option<MessageSendEvent>, msgs::RevokeAndACK) {
1481         let (as_revoke_and_ack, as_commitment_signed) = get_revoke_commit_msgs!(node_a, node_b.node.get_our_node_id());
1482         check_added_monitors!(node_b, 0);
1483         assert!(node_b.node.get_and_clear_pending_msg_events().is_empty());
1484         node_b.node.handle_revoke_and_ack(&node_a.node.get_our_node_id(), &as_revoke_and_ack);
1485         assert!(node_b.node.get_and_clear_pending_msg_events().is_empty());
1486         check_added_monitors!(node_b, 1);
1487         node_b.node.handle_commitment_signed(&node_a.node.get_our_node_id(), &as_commitment_signed);
1488         let (bs_revoke_and_ack, extra_msg_option) = {
1489                 let events = node_b.node.get_and_clear_pending_msg_events();
1490                 assert!(events.len() <= 2);
1491                 let (node_a_event, events) = remove_first_msg_event_to_node(&node_a.node.get_our_node_id(), &events);
1492                 (match node_a_event {
1493                         MessageSendEvent::SendRevokeAndACK { ref node_id, ref msg } => {
1494                                 assert_eq!(*node_id, node_a.node.get_our_node_id());
1495                                 (*msg).clone()
1496                         },
1497                         _ => panic!("Unexpected event"),
1498                 }, events.get(0).map(|e| e.clone()))
1499         };
1500         check_added_monitors!(node_b, 1);
1501         if fail_backwards {
1502                 assert!(node_a.node.get_and_clear_pending_events().is_empty());
1503                 assert!(node_a.node.get_and_clear_pending_msg_events().is_empty());
1504         }
1505         (extra_msg_option, bs_revoke_and_ack)
1506 }
1507
1508 pub fn do_commitment_signed_dance(node_a: &Node<'_, '_, '_>, node_b: &Node<'_, '_, '_>, commitment_signed: &msgs::CommitmentSigned, fail_backwards: bool, skip_last_step: bool) {
1509         check_added_monitors!(node_a, 0);
1510         assert!(node_a.node.get_and_clear_pending_msg_events().is_empty());
1511         node_a.node.handle_commitment_signed(&node_b.node.get_our_node_id(), commitment_signed);
1512         check_added_monitors!(node_a, 1);
1513
1514         commitment_signed_dance!(node_a, node_b, (), fail_backwards, true, false);
1515
1516         if skip_last_step { return; }
1517
1518         if fail_backwards {
1519                 expect_pending_htlcs_forwardable_and_htlc_handling_failed!(node_a,
1520                         vec![crate::util::events::HTLCDestination::NextHopChannel{ node_id: Some(node_b.node.get_our_node_id()), channel_id: commitment_signed.channel_id }]);
1521                 check_added_monitors!(node_a, 1);
1522
1523                 let node_a_per_peer_state = node_a.node.per_peer_state.read().unwrap();
1524                 let mut number_of_msg_events = 0;
1525                 for (cp_id, peer_state_mutex) in node_a_per_peer_state.iter() {
1526                         let peer_state = peer_state_mutex.lock().unwrap();
1527                         let cp_pending_msg_events = &peer_state.pending_msg_events;
1528                         number_of_msg_events += cp_pending_msg_events.len();
1529                         if cp_pending_msg_events.len() == 1 {
1530                                 if let MessageSendEvent::UpdateHTLCs { .. } = cp_pending_msg_events[0] {
1531                                         assert_ne!(*cp_id, node_b.node.get_our_node_id());
1532                                 } else { panic!("Unexpected event"); }
1533                         }
1534                 }
1535                 // Expecting the failure backwards event to the previous hop (not `node_b`)
1536                 assert_eq!(number_of_msg_events, 1);
1537         } else {
1538                 assert!(node_a.node.get_and_clear_pending_msg_events().is_empty());
1539         }
1540 }
1541
1542 /// Get a payment preimage and hash.
1543 #[macro_export]
1544 macro_rules! get_payment_preimage_hash {
1545         ($dest_node: expr) => {
1546                 {
1547                         get_payment_preimage_hash!($dest_node, None)
1548                 }
1549         };
1550         ($dest_node: expr, $min_value_msat: expr) => {
1551                 {
1552                         crate::get_payment_preimage_hash!($dest_node, $min_value_msat, None)
1553                 }
1554         };
1555         ($dest_node: expr, $min_value_msat: expr, $min_final_cltv_expiry_delta: expr) => {
1556                 {
1557                         use bitcoin::hashes::Hash as _;
1558                         let mut payment_count = $dest_node.network_payment_count.borrow_mut();
1559                         let payment_preimage = $crate::ln::PaymentPreimage([*payment_count; 32]);
1560                         *payment_count += 1;
1561                         let payment_hash = $crate::ln::PaymentHash(
1562                                 bitcoin::hashes::sha256::Hash::hash(&payment_preimage.0[..]).into_inner());
1563                         let payment_secret = $dest_node.node.create_inbound_payment_for_hash(payment_hash, $min_value_msat, 7200, $min_final_cltv_expiry_delta).unwrap();
1564                         (payment_preimage, payment_hash, payment_secret)
1565                 }
1566         };
1567 }
1568
1569 #[macro_export]
1570 macro_rules! get_route {
1571         ($send_node: expr, $payment_params: expr, $recv_value: expr, $cltv: expr) => {{
1572                 use $crate::chain::keysinterface::EntropySource;
1573                 let scorer = $crate::util::test_utils::TestScorer::with_penalty(0);
1574                 let keys_manager = $crate::util::test_utils::TestKeysInterface::new(&[0u8; 32], bitcoin::network::constants::Network::Testnet);
1575                 let random_seed_bytes = keys_manager.get_secure_random_bytes();
1576                 $crate::routing::router::get_route(
1577                         &$send_node.node.get_our_node_id(), &$payment_params, &$send_node.network_graph.read_only(),
1578                         Some(&$send_node.node.list_usable_channels().iter().collect::<Vec<_>>()),
1579                         $recv_value, $cltv, $send_node.logger, &scorer, &random_seed_bytes
1580                 )
1581         }}
1582 }
1583
1584 #[cfg(test)]
1585 #[macro_export]
1586 macro_rules! get_route_and_payment_hash {
1587         ($send_node: expr, $recv_node: expr, $recv_value: expr) => {{
1588                 let payment_params = $crate::routing::router::PaymentParameters::from_node_id($recv_node.node.get_our_node_id(), TEST_FINAL_CLTV)
1589                         .with_features($recv_node.node.invoice_features());
1590                 $crate::get_route_and_payment_hash!($send_node, $recv_node, payment_params, $recv_value, TEST_FINAL_CLTV)
1591         }};
1592         ($send_node: expr, $recv_node: expr, $payment_params: expr, $recv_value: expr, $cltv: expr) => {{
1593                 let (payment_preimage, payment_hash, payment_secret) = $crate::get_payment_preimage_hash!($recv_node, Some($recv_value));
1594                 let route = $crate::get_route!($send_node, $payment_params, $recv_value, $cltv);
1595                 (route.unwrap(), payment_hash, payment_preimage, payment_secret)
1596         }}
1597 }
1598
1599 #[macro_export]
1600 #[cfg(any(test, feature = "_bench_unstable", feature = "_test_utils"))]
1601 macro_rules! expect_payment_claimable {
1602         ($node: expr, $expected_payment_hash: expr, $expected_payment_secret: expr, $expected_recv_value: expr) => {
1603                 expect_payment_claimable!($node, $expected_payment_hash, $expected_payment_secret, $expected_recv_value, None, $node.node.get_our_node_id())
1604         };
1605         ($node: expr, $expected_payment_hash: expr, $expected_payment_secret: expr, $expected_recv_value: expr, $expected_payment_preimage: expr, $expected_receiver_node_id: expr) => {
1606                 let events = $node.node.get_and_clear_pending_events();
1607                 assert_eq!(events.len(), 1);
1608                 match events[0] {
1609                         $crate::util::events::Event::PaymentClaimable { ref payment_hash, ref purpose, amount_msat, receiver_node_id, via_channel_id: _, via_user_channel_id: _ } => {
1610                                 assert_eq!($expected_payment_hash, *payment_hash);
1611                                 assert_eq!($expected_recv_value, amount_msat);
1612                                 assert_eq!($expected_receiver_node_id, receiver_node_id.unwrap());
1613                                 match purpose {
1614                                         $crate::util::events::PaymentPurpose::InvoicePayment { payment_preimage, payment_secret, .. } => {
1615                                                 assert_eq!(&$expected_payment_preimage, payment_preimage);
1616                                                 assert_eq!($expected_payment_secret, *payment_secret);
1617                                         },
1618                                         _ => {},
1619                                 }
1620                         },
1621                         _ => panic!("Unexpected event"),
1622                 }
1623         }
1624 }
1625
1626 #[macro_export]
1627 #[cfg(any(test, feature = "_bench_unstable", feature = "_test_utils"))]
1628 macro_rules! expect_payment_claimed {
1629         ($node: expr, $expected_payment_hash: expr, $expected_recv_value: expr) => {
1630                 let events = $node.node.get_and_clear_pending_events();
1631                 assert_eq!(events.len(), 1);
1632                 match events[0] {
1633                         $crate::util::events::Event::PaymentClaimed { ref payment_hash, amount_msat, .. } => {
1634                                 assert_eq!($expected_payment_hash, *payment_hash);
1635                                 assert_eq!($expected_recv_value, amount_msat);
1636                         },
1637                         _ => panic!("Unexpected event"),
1638                 }
1639         }
1640 }
1641
1642 #[cfg(test)]
1643 #[macro_export]
1644 macro_rules! expect_payment_sent_without_paths {
1645         ($node: expr, $expected_payment_preimage: expr) => {
1646                 expect_payment_sent!($node, $expected_payment_preimage, None::<u64>, false);
1647         };
1648         ($node: expr, $expected_payment_preimage: expr, $expected_fee_msat_opt: expr) => {
1649                 expect_payment_sent!($node, $expected_payment_preimage, $expected_fee_msat_opt, false);
1650         }
1651 }
1652
1653 #[macro_export]
1654 macro_rules! expect_payment_sent {
1655         ($node: expr, $expected_payment_preimage: expr) => {
1656                 $crate::expect_payment_sent!($node, $expected_payment_preimage, None::<u64>, true);
1657         };
1658         ($node: expr, $expected_payment_preimage: expr, $expected_fee_msat_opt: expr) => {
1659                 $crate::expect_payment_sent!($node, $expected_payment_preimage, $expected_fee_msat_opt, true);
1660         };
1661         ($node: expr, $expected_payment_preimage: expr, $expected_fee_msat_opt: expr, $expect_paths: expr) => { {
1662                 use bitcoin::hashes::Hash as _;
1663                 let events = $node.node.get_and_clear_pending_events();
1664                 let expected_payment_hash = $crate::ln::PaymentHash(
1665                         bitcoin::hashes::sha256::Hash::hash(&$expected_payment_preimage.0).into_inner());
1666                 if $expect_paths {
1667                         assert!(events.len() > 1);
1668                 } else {
1669                         assert_eq!(events.len(), 1);
1670                 }
1671                 let expected_payment_id = match events[0] {
1672                         $crate::util::events::Event::PaymentSent { ref payment_id, ref payment_preimage, ref payment_hash, ref fee_paid_msat } => {
1673                                 assert_eq!($expected_payment_preimage, *payment_preimage);
1674                                 assert_eq!(expected_payment_hash, *payment_hash);
1675                                 assert!(fee_paid_msat.is_some());
1676                                 if $expected_fee_msat_opt.is_some() {
1677                                         assert_eq!(*fee_paid_msat, $expected_fee_msat_opt);
1678                                 }
1679                                 payment_id.unwrap()
1680                         },
1681                         _ => panic!("Unexpected event"),
1682                 };
1683                 if $expect_paths {
1684                         for i in 1..events.len() {
1685                                 match events[i] {
1686                                         $crate::util::events::Event::PaymentPathSuccessful { payment_id, payment_hash, .. } => {
1687                                                 assert_eq!(payment_id, expected_payment_id);
1688                                                 assert_eq!(payment_hash, Some(expected_payment_hash));
1689                                         },
1690                                         _ => panic!("Unexpected event"),
1691                                 }
1692                         }
1693                 }
1694         } }
1695 }
1696
1697 #[cfg(test)]
1698 #[macro_export]
1699 macro_rules! expect_payment_path_successful {
1700         ($node: expr) => {
1701                 let events = $node.node.get_and_clear_pending_events();
1702                 assert_eq!(events.len(), 1);
1703                 match events[0] {
1704                         $crate::util::events::Event::PaymentPathSuccessful { .. } => {},
1705                         _ => panic!("Unexpected event"),
1706                 }
1707         }
1708 }
1709
1710 macro_rules! expect_payment_forwarded {
1711         ($node: expr, $prev_node: expr, $next_node: expr, $expected_fee: expr, $upstream_force_closed: expr, $downstream_force_closed: expr) => {
1712                 let events = $node.node.get_and_clear_pending_events();
1713                 assert_eq!(events.len(), 1);
1714                 match events[0] {
1715                         Event::PaymentForwarded { fee_earned_msat, prev_channel_id, claim_from_onchain_tx, next_channel_id } => {
1716                                 assert_eq!(fee_earned_msat, $expected_fee);
1717                                 if fee_earned_msat.is_some() {
1718                                         // Is the event prev_channel_id in one of the channels between the two nodes?
1719                                         assert!($node.node.list_channels().iter().any(|x| x.counterparty.node_id == $prev_node.node.get_our_node_id() && x.channel_id == prev_channel_id.unwrap()));
1720                                 }
1721                                 // We check for force closures since a force closed channel is removed from the
1722                                 // node's channel list
1723                                 if !$downstream_force_closed {
1724                                         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()));
1725                                 }
1726                                 assert_eq!(claim_from_onchain_tx, $downstream_force_closed);
1727                         },
1728                         _ => panic!("Unexpected event"),
1729                 }
1730         }
1731 }
1732
1733 #[cfg(any(test, feature = "_bench_unstable", feature = "_test_utils"))]
1734 pub fn expect_channel_ready_event<'a, 'b, 'c, 'd>(node: &'a Node<'b, 'c, 'd>, expected_counterparty_node_id: &PublicKey) {
1735         let events = node.node.get_and_clear_pending_events();
1736         assert_eq!(events.len(), 1);
1737         match events[0] {
1738                 crate::util::events::Event::ChannelReady{ ref counterparty_node_id, .. } => {
1739                         assert_eq!(*expected_counterparty_node_id, *counterparty_node_id);
1740                 },
1741                 _ => panic!("Unexpected event"),
1742         }
1743 }
1744
1745
1746 pub struct PaymentFailedConditions<'a> {
1747         pub(crate) expected_htlc_error_data: Option<(u16, &'a [u8])>,
1748         pub(crate) expected_blamed_scid: Option<u64>,
1749         pub(crate) expected_blamed_chan_closed: Option<bool>,
1750         pub(crate) expected_mpp_parts_remain: bool,
1751 }
1752
1753 impl<'a> PaymentFailedConditions<'a> {
1754         pub fn new() -> Self {
1755                 Self {
1756                         expected_htlc_error_data: None,
1757                         expected_blamed_scid: None,
1758                         expected_blamed_chan_closed: None,
1759                         expected_mpp_parts_remain: false,
1760                 }
1761         }
1762         pub fn mpp_parts_remain(mut self) -> Self {
1763                 self.expected_mpp_parts_remain = true;
1764                 self
1765         }
1766         pub fn blamed_scid(mut self, scid: u64) -> Self {
1767                 self.expected_blamed_scid = Some(scid);
1768                 self
1769         }
1770         pub fn blamed_chan_closed(mut self, closed: bool) -> Self {
1771                 self.expected_blamed_chan_closed = Some(closed);
1772                 self
1773         }
1774         pub fn expected_htlc_error_data(mut self, code: u16, data: &'a [u8]) -> Self {
1775                 self.expected_htlc_error_data = Some((code, data));
1776                 self
1777         }
1778 }
1779
1780 #[cfg(test)]
1781 macro_rules! expect_payment_failed_with_update {
1782         ($node: expr, $expected_payment_hash: expr, $payment_failed_permanently: expr, $scid: expr, $chan_closed: expr) => {
1783                 $crate::ln::functional_test_utils::expect_payment_failed_conditions(
1784                         &$node, $expected_payment_hash, $payment_failed_permanently,
1785                         $crate::ln::functional_test_utils::PaymentFailedConditions::new()
1786                                 .blamed_scid($scid).blamed_chan_closed($chan_closed));
1787         }
1788 }
1789
1790 #[cfg(test)]
1791 macro_rules! expect_payment_failed {
1792         ($node: expr, $expected_payment_hash: expr, $payment_failed_permanently: expr $(, $expected_error_code: expr, $expected_error_data: expr)*) => {
1793                 #[allow(unused_mut)]
1794                 let mut conditions = $crate::ln::functional_test_utils::PaymentFailedConditions::new();
1795                 $(
1796                         conditions = conditions.expected_htlc_error_data($expected_error_code, &$expected_error_data);
1797                 )*
1798                 $crate::ln::functional_test_utils::expect_payment_failed_conditions(&$node, $expected_payment_hash, $payment_failed_permanently, conditions);
1799         };
1800 }
1801
1802 pub fn expect_payment_failed_conditions_event<'a, 'b, 'c, 'd, 'e>(
1803         node: &'a Node<'b, 'c, 'd>, payment_failed_event: Event, expected_payment_hash: PaymentHash,
1804         expected_payment_failed_permanently: bool, conditions: PaymentFailedConditions<'e>
1805 ) {
1806         let expected_payment_id = match payment_failed_event {
1807                 Event::PaymentPathFailed { payment_hash, payment_failed_permanently, path, retry, payment_id, network_update, short_channel_id,
1808                         #[cfg(test)]
1809                         error_code,
1810                         #[cfg(test)]
1811                         error_data, .. } => {
1812                         assert_eq!(payment_hash, expected_payment_hash, "unexpected payment_hash");
1813                         assert_eq!(payment_failed_permanently, expected_payment_failed_permanently, "unexpected payment_failed_permanently value");
1814                         assert!(retry.is_some(), "expected retry.is_some()");
1815                         assert_eq!(retry.as_ref().unwrap().final_value_msat, path.last().unwrap().fee_msat, "Retry amount should match last hop in path");
1816                         assert_eq!(retry.as_ref().unwrap().payment_params.payee_pubkey, path.last().unwrap().pubkey, "Retry payee node_id should match last hop in path");
1817                         if let Some(scid) = short_channel_id {
1818                                 assert!(retry.as_ref().unwrap().payment_params.previously_failed_channels.contains(&scid));
1819                         }
1820
1821                         #[cfg(test)]
1822                         {
1823                                 assert!(error_code.is_some(), "expected error_code.is_some() = true");
1824                                 assert!(error_data.is_some(), "expected error_data.is_some() = true");
1825                                 if let Some((code, data)) = conditions.expected_htlc_error_data {
1826                                         assert_eq!(error_code.unwrap(), code, "unexpected error code");
1827                                         assert_eq!(&error_data.as_ref().unwrap()[..], data, "unexpected error data");
1828                                 }
1829                         }
1830
1831                         if let Some(chan_closed) = conditions.expected_blamed_chan_closed {
1832                                 match network_update {
1833                                         Some(NetworkUpdate::ChannelUpdateMessage { ref msg }) if !chan_closed => {
1834                                                 if let Some(scid) = conditions.expected_blamed_scid {
1835                                                         assert_eq!(msg.contents.short_channel_id, scid);
1836                                                 }
1837                                                 const CHAN_DISABLED_FLAG: u8 = 2;
1838                                                 assert_eq!(msg.contents.flags & CHAN_DISABLED_FLAG, 0);
1839                                         },
1840                                         Some(NetworkUpdate::ChannelFailure { short_channel_id, is_permanent }) if chan_closed => {
1841                                                 if let Some(scid) = conditions.expected_blamed_scid {
1842                                                         assert_eq!(short_channel_id, scid);
1843                                                 }
1844                                                 assert!(is_permanent);
1845                                         },
1846                                         Some(_) => panic!("Unexpected update type"),
1847                                         None => panic!("Expected update"),
1848                                 }
1849                         }
1850
1851                         payment_id.unwrap()
1852                 },
1853                 _ => panic!("Unexpected event"),
1854         };
1855         if !conditions.expected_mpp_parts_remain {
1856                 node.node.abandon_payment(expected_payment_id);
1857                 let events = node.node.get_and_clear_pending_events();
1858                 assert_eq!(events.len(), 1);
1859                 match events[0] {
1860                         Event::PaymentFailed { ref payment_hash, ref payment_id } => {
1861                                 assert_eq!(*payment_hash, expected_payment_hash, "unexpected second payment_hash");
1862                                 assert_eq!(*payment_id, expected_payment_id);
1863                         }
1864                         _ => panic!("Unexpected second event"),
1865                 }
1866         }
1867 }
1868
1869 pub fn expect_payment_failed_conditions<'a, 'b, 'c, 'd, 'e>(
1870         node: &'a Node<'b, 'c, 'd>, expected_payment_hash: PaymentHash, expected_payment_failed_permanently: bool,
1871         conditions: PaymentFailedConditions<'e>
1872 ) {
1873         let mut events = node.node.get_and_clear_pending_events();
1874         assert_eq!(events.len(), 1);
1875         expect_payment_failed_conditions_event(node, events.pop().unwrap(), expected_payment_hash, expected_payment_failed_permanently, conditions);
1876 }
1877
1878 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 {
1879         let payment_id = PaymentId(origin_node.keys_manager.backing.get_secure_random_bytes());
1880         origin_node.node.send_payment(&route, our_payment_hash, &Some(our_payment_secret), payment_id).unwrap();
1881         check_added_monitors!(origin_node, expected_paths.len());
1882         pass_along_route(origin_node, expected_paths, recv_value, our_payment_hash, our_payment_secret);
1883         payment_id
1884 }
1885
1886 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>) {
1887         let mut payment_event = SendEvent::from_event(ev);
1888         let mut prev_node = origin_node;
1889
1890         for (idx, &node) in expected_path.iter().enumerate() {
1891                 assert_eq!(node.node.get_our_node_id(), payment_event.node_id);
1892
1893                 node.node.handle_update_add_htlc(&prev_node.node.get_our_node_id(), &payment_event.msgs[0]);
1894                 check_added_monitors!(node, 0);
1895                 commitment_signed_dance!(node, prev_node, payment_event.commitment_msg, false);
1896
1897                 expect_pending_htlcs_forwardable!(node);
1898
1899                 if idx == expected_path.len() - 1 && clear_recipient_events {
1900                         let events_2 = node.node.get_and_clear_pending_events();
1901                         if payment_claimable_expected {
1902                                 assert_eq!(events_2.len(), 1);
1903                                 match events_2[0] {
1904                                         Event::PaymentClaimable { ref payment_hash, ref purpose, amount_msat, receiver_node_id, ref via_channel_id, ref via_user_channel_id } => {
1905                                                 assert_eq!(our_payment_hash, *payment_hash);
1906                                                 assert_eq!(node.node.get_our_node_id(), receiver_node_id.unwrap());
1907                                                 match &purpose {
1908                                                         PaymentPurpose::InvoicePayment { payment_preimage, payment_secret, .. } => {
1909                                                                 assert_eq!(expected_preimage, *payment_preimage);
1910                                                                 assert_eq!(our_payment_secret.unwrap(), *payment_secret);
1911                                                         },
1912                                                         PaymentPurpose::SpontaneousPayment(payment_preimage) => {
1913                                                                 assert_eq!(expected_preimage.unwrap(), *payment_preimage);
1914                                                                 assert!(our_payment_secret.is_none());
1915                                                         },
1916                                                 }
1917                                                 assert_eq!(amount_msat, recv_value);
1918                                                 assert!(node.node.list_channels().iter().any(|details| details.channel_id == via_channel_id.unwrap()));
1919                                                 assert!(node.node.list_channels().iter().any(|details| details.user_channel_id == via_user_channel_id.unwrap()));
1920                                         },
1921                                         _ => panic!("Unexpected event"),
1922                                 }
1923                         } else {
1924                                 assert!(events_2.is_empty());
1925                         }
1926                 } else if idx != expected_path.len() - 1 {
1927                         let mut events_2 = node.node.get_and_clear_pending_msg_events();
1928                         assert_eq!(events_2.len(), 1);
1929                         check_added_monitors!(node, 1);
1930                         payment_event = SendEvent::from_event(events_2.remove(0));
1931                         assert_eq!(payment_event.msgs.len(), 1);
1932                 }
1933
1934                 prev_node = node;
1935         }
1936 }
1937
1938 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>) {
1939         do_pass_along_path(origin_node, expected_path, recv_value, our_payment_hash, our_payment_secret, ev, payment_claimable_expected, true, expected_preimage);
1940 }
1941
1942 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) {
1943         let mut events = origin_node.node.get_and_clear_pending_msg_events();
1944         assert_eq!(events.len(), expected_route.len());
1945         for (path_idx, expected_path) in expected_route.iter().enumerate() {
1946                 let (ev, updated_events) = remove_first_msg_event_to_node(&expected_path[0].node.get_our_node_id(), &events);
1947                 events = updated_events;
1948                 // Once we've gotten through all the HTLCs, the last one should result in a
1949                 // PaymentClaimable (but each previous one should not!), .
1950                 let expect_payment = path_idx == expected_route.len() - 1;
1951                 pass_along_path(origin_node, expected_path, recv_value, our_payment_hash.clone(), Some(our_payment_secret), ev, expect_payment, None);
1952         }
1953 }
1954
1955 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) {
1956         let (our_payment_preimage, our_payment_hash, our_payment_secret) = get_payment_preimage_hash!(expected_route.last().unwrap());
1957         let payment_id = send_along_route_with_secret(origin_node, route, &[expected_route], recv_value, our_payment_hash, our_payment_secret);
1958         (our_payment_preimage, our_payment_hash, our_payment_secret, payment_id)
1959 }
1960
1961 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 {
1962         for path in expected_paths.iter() {
1963                 assert_eq!(path.last().unwrap().node.get_our_node_id(), expected_paths[0].last().unwrap().node.get_our_node_id());
1964         }
1965         expected_paths[0].last().unwrap().node.claim_funds(our_payment_preimage);
1966
1967         let claim_event = expected_paths[0].last().unwrap().node.get_and_clear_pending_events();
1968         assert_eq!(claim_event.len(), 1);
1969         match claim_event[0] {
1970                 Event::PaymentClaimed { purpose: PaymentPurpose::SpontaneousPayment(preimage), .. }|
1971                 Event::PaymentClaimed { purpose: PaymentPurpose::InvoicePayment { payment_preimage: Some(preimage), ..}, .. } =>
1972                         assert_eq!(preimage, our_payment_preimage),
1973                 Event::PaymentClaimed { purpose: PaymentPurpose::InvoicePayment { .. }, payment_hash, .. } =>
1974                         assert_eq!(&payment_hash.0, &Sha256::hash(&our_payment_preimage.0)[..]),
1975                 _ => panic!(),
1976         }
1977
1978         check_added_monitors!(expected_paths[0].last().unwrap(), expected_paths.len());
1979
1980         let mut expected_total_fee_msat = 0;
1981
1982         macro_rules! msgs_from_ev {
1983                 ($ev: expr) => {
1984                         match $ev {
1985                                 &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 } } => {
1986                                         assert!(update_add_htlcs.is_empty());
1987                                         assert_eq!(update_fulfill_htlcs.len(), 1);
1988                                         assert!(update_fail_htlcs.is_empty());
1989                                         assert!(update_fail_malformed_htlcs.is_empty());
1990                                         assert!(update_fee.is_none());
1991                                         ((update_fulfill_htlcs[0].clone(), commitment_signed.clone()), node_id.clone())
1992                                 },
1993                                 _ => panic!("Unexpected event"),
1994                         }
1995                 }
1996         }
1997         let mut per_path_msgs: Vec<((msgs::UpdateFulfillHTLC, msgs::CommitmentSigned), PublicKey)> = Vec::with_capacity(expected_paths.len());
1998         let mut events = expected_paths[0].last().unwrap().node.get_and_clear_pending_msg_events();
1999         assert_eq!(events.len(), expected_paths.len());
2000
2001         if events.len() == 1 {
2002                 per_path_msgs.push(msgs_from_ev!(&events[0]));
2003         } else {
2004                 for expected_path in expected_paths.iter() {
2005                         // For MPP payments, we always want the message to the first node in the path.
2006                         let (ev, updated_events) = remove_first_msg_event_to_node(&expected_path[0].node.get_our_node_id(), &events);
2007                         per_path_msgs.push(msgs_from_ev!(&ev));
2008                         events = updated_events;
2009                 }
2010         }
2011
2012         for (expected_route, (path_msgs, next_hop)) in expected_paths.iter().zip(per_path_msgs.drain(..)) {
2013                 let mut next_msgs = Some(path_msgs);
2014                 let mut expected_next_node = next_hop;
2015
2016                 macro_rules! last_update_fulfill_dance {
2017                         ($node: expr, $prev_node: expr) => {
2018                                 {
2019                                         $node.node.handle_update_fulfill_htlc(&$prev_node.node.get_our_node_id(), &next_msgs.as_ref().unwrap().0);
2020                                         check_added_monitors!($node, 0);
2021                                         assert!($node.node.get_and_clear_pending_msg_events().is_empty());
2022                                         commitment_signed_dance!($node, $prev_node, next_msgs.as_ref().unwrap().1, false);
2023                                 }
2024                         }
2025                 }
2026                 macro_rules! mid_update_fulfill_dance {
2027                         ($node: expr, $prev_node: expr, $next_node: expr, $new_msgs: expr) => {
2028                                 {
2029                                         $node.node.handle_update_fulfill_htlc(&$prev_node.node.get_our_node_id(), &next_msgs.as_ref().unwrap().0);
2030                                         let fee = {
2031                                                 let per_peer_state = $node.node.per_peer_state.read().unwrap();
2032                                                 let peer_state = per_peer_state.get(&$prev_node.node.get_our_node_id())
2033                                                         .unwrap().lock().unwrap();
2034                                                 let channel = peer_state.channel_by_id.get(&next_msgs.as_ref().unwrap().0.channel_id).unwrap();
2035                                                 if let Some(prev_config) = channel.prev_config() {
2036                                                         prev_config.forwarding_fee_base_msat
2037                                                 } else {
2038                                                         channel.config().forwarding_fee_base_msat
2039                                                 }
2040                                         };
2041                                         expect_payment_forwarded!($node, $next_node, $prev_node, Some(fee as u64), false, false);
2042                                         expected_total_fee_msat += fee as u64;
2043                                         check_added_monitors!($node, 1);
2044                                         let new_next_msgs = if $new_msgs {
2045                                                 let events = $node.node.get_and_clear_pending_msg_events();
2046                                                 assert_eq!(events.len(), 1);
2047                                                 let (res, nexthop) = msgs_from_ev!(&events[0]);
2048                                                 expected_next_node = nexthop;
2049                                                 Some(res)
2050                                         } else {
2051                                                 assert!($node.node.get_and_clear_pending_msg_events().is_empty());
2052                                                 None
2053                                         };
2054                                         commitment_signed_dance!($node, $prev_node, next_msgs.as_ref().unwrap().1, false);
2055                                         next_msgs = new_next_msgs;
2056                                 }
2057                         }
2058                 }
2059
2060                 let mut prev_node = expected_route.last().unwrap();
2061                 for (idx, node) in expected_route.iter().rev().enumerate().skip(1) {
2062                         assert_eq!(expected_next_node, node.node.get_our_node_id());
2063                         let update_next_msgs = !skip_last || idx != expected_route.len() - 1;
2064                         if next_msgs.is_some() {
2065                                 // Since we are traversing in reverse, next_node is actually the previous node
2066                                 let next_node: &Node;
2067                                 if idx == expected_route.len() - 1 {
2068                                         next_node = origin_node;
2069                                 } else {
2070                                         next_node = expected_route[expected_route.len() - 1 - idx - 1];
2071                                 }
2072                                 mid_update_fulfill_dance!(node, prev_node, next_node, update_next_msgs);
2073                         } else {
2074                                 assert!(!update_next_msgs);
2075                                 assert!(node.node.get_and_clear_pending_msg_events().is_empty());
2076                         }
2077                         if !skip_last && idx == expected_route.len() - 1 {
2078                                 assert_eq!(expected_next_node, origin_node.node.get_our_node_id());
2079                         }
2080
2081                         prev_node = node;
2082                 }
2083
2084                 if !skip_last {
2085                         last_update_fulfill_dance!(origin_node, expected_route.first().unwrap());
2086                 }
2087         }
2088
2089         // Ensure that claim_funds is idempotent.
2090         expected_paths[0].last().unwrap().node.claim_funds(our_payment_preimage);
2091         assert!(expected_paths[0].last().unwrap().node.get_and_clear_pending_msg_events().is_empty());
2092         check_added_monitors!(expected_paths[0].last().unwrap(), 0);
2093
2094         expected_total_fee_msat
2095 }
2096 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) {
2097         let expected_total_fee_msat = do_claim_payment_along_route(origin_node, expected_paths, skip_last, our_payment_preimage);
2098         if !skip_last {
2099                 expect_payment_sent!(origin_node, our_payment_preimage, Some(expected_total_fee_msat));
2100         }
2101 }
2102
2103 pub fn claim_payment<'a, 'b, 'c>(origin_node: &Node<'a, 'b, 'c>, expected_route: &[&Node<'a, 'b, 'c>], our_payment_preimage: PaymentPreimage) {
2104         claim_payment_along_route(origin_node, &[expected_route], false, our_payment_preimage);
2105 }
2106
2107 pub const TEST_FINAL_CLTV: u32 = 70;
2108
2109 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) {
2110         let payment_params = PaymentParameters::from_node_id(expected_route.last().unwrap().node.get_our_node_id(), TEST_FINAL_CLTV)
2111                 .with_features(expected_route.last().unwrap().node.invoice_features());
2112         let route = get_route!(origin_node, payment_params, recv_value, TEST_FINAL_CLTV).unwrap();
2113         assert_eq!(route.paths.len(), 1);
2114         assert_eq!(route.paths[0].len(), expected_route.len());
2115         for (node, hop) in expected_route.iter().zip(route.paths[0].iter()) {
2116                 assert_eq!(hop.pubkey, node.node.get_our_node_id());
2117         }
2118
2119         let res = send_along_route(origin_node, route, expected_route, recv_value);
2120         (res.0, res.1, res.2)
2121 }
2122
2123 pub fn route_over_limit<'a, 'b, 'c>(origin_node: &Node<'a, 'b, 'c>, expected_route: &[&Node<'a, 'b, 'c>], recv_value: u64)  {
2124         let payment_params = PaymentParameters::from_node_id(expected_route.last().unwrap().node.get_our_node_id(), TEST_FINAL_CLTV)
2125                 .with_features(expected_route.last().unwrap().node.invoice_features());
2126         let network_graph = origin_node.network_graph.read_only();
2127         let scorer = test_utils::TestScorer::with_penalty(0);
2128         let seed = [0u8; 32];
2129         let keys_manager = test_utils::TestKeysInterface::new(&seed, Network::Testnet);
2130         let random_seed_bytes = keys_manager.get_secure_random_bytes();
2131         let route = get_route(
2132                 &origin_node.node.get_our_node_id(), &payment_params, &network_graph,
2133                 None, recv_value, TEST_FINAL_CLTV, origin_node.logger, &scorer, &random_seed_bytes).unwrap();
2134         assert_eq!(route.paths.len(), 1);
2135         assert_eq!(route.paths[0].len(), expected_route.len());
2136         for (node, hop) in expected_route.iter().zip(route.paths[0].iter()) {
2137                 assert_eq!(hop.pubkey, node.node.get_our_node_id());
2138         }
2139
2140         let (_, our_payment_hash, our_payment_preimage) = get_payment_preimage_hash!(expected_route.last().unwrap());
2141         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 },
2142                 assert!(err.contains("Cannot send value that would put us over the max HTLC value in flight our peer will accept")));
2143 }
2144
2145 pub fn send_payment<'a, 'b, 'c>(origin: &Node<'a, 'b, 'c>, expected_route: &[&Node<'a, 'b, 'c>], recv_value: u64)  {
2146         let our_payment_preimage = route_payment(&origin, expected_route, recv_value).0;
2147         claim_payment(&origin, expected_route, our_payment_preimage);
2148 }
2149
2150 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) {
2151         for path in expected_paths.iter() {
2152                 assert_eq!(path.last().unwrap().node.get_our_node_id(), expected_paths[0].last().unwrap().node.get_our_node_id());
2153         }
2154         expected_paths[0].last().unwrap().node.fail_htlc_backwards(&our_payment_hash);
2155         let expected_destinations: Vec<HTLCDestination> = repeat(HTLCDestination::FailedPayment { payment_hash: our_payment_hash }).take(expected_paths.len()).collect();
2156         expect_pending_htlcs_forwardable_and_htlc_handling_failed!(expected_paths[0].last().unwrap(), expected_destinations);
2157
2158         pass_failed_payment_back(origin_node, expected_paths, skip_last, our_payment_hash);
2159 }
2160
2161 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) {
2162         let expected_payment_id = pass_failed_payment_back_no_abandon(origin_node, expected_paths_slice, skip_last, our_payment_hash);
2163         if !skip_last {
2164                 origin_node.node.abandon_payment(expected_payment_id.unwrap());
2165                 let events = origin_node.node.get_and_clear_pending_events();
2166                 assert_eq!(events.len(), 1);
2167                 match events[0] {
2168                         Event::PaymentFailed { ref payment_hash, ref payment_id } => {
2169                                 assert_eq!(*payment_hash, our_payment_hash, "unexpected second payment_hash");
2170                                 assert_eq!(*payment_id, expected_payment_id.unwrap());
2171                         }
2172                         _ => panic!("Unexpected second event"),
2173                 }
2174         }
2175 }
2176
2177 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> {
2178         let mut expected_paths: Vec<_> = expected_paths_slice.iter().collect();
2179         check_added_monitors!(expected_paths[0].last().unwrap(), expected_paths.len());
2180
2181         let mut per_path_msgs: Vec<((msgs::UpdateFailHTLC, msgs::CommitmentSigned), PublicKey)> = Vec::with_capacity(expected_paths.len());
2182         let events = expected_paths[0].last().unwrap().node.get_and_clear_pending_msg_events();
2183         assert_eq!(events.len(), expected_paths.len());
2184         for ev in events.iter() {
2185                 let (update_fail, commitment_signed, node_id) = match ev {
2186                         &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 } } => {
2187                                 assert!(update_add_htlcs.is_empty());
2188                                 assert!(update_fulfill_htlcs.is_empty());
2189                                 assert_eq!(update_fail_htlcs.len(), 1);
2190                                 assert!(update_fail_malformed_htlcs.is_empty());
2191                                 assert!(update_fee.is_none());
2192                                 (update_fail_htlcs[0].clone(), commitment_signed.clone(), node_id.clone())
2193                         },
2194                         _ => panic!("Unexpected event"),
2195                 };
2196                 per_path_msgs.push(((update_fail, commitment_signed), node_id));
2197         }
2198         per_path_msgs.sort_unstable_by(|(_, node_id_a), (_, node_id_b)| node_id_a.cmp(node_id_b));
2199         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()));
2200
2201         let mut expected_payment_id = None;
2202
2203         for (i, (expected_route, (path_msgs, next_hop))) in expected_paths.iter().zip(per_path_msgs.drain(..)).enumerate() {
2204                 let mut next_msgs = Some(path_msgs);
2205                 let mut expected_next_node = next_hop;
2206                 let mut prev_node = expected_route.last().unwrap();
2207
2208                 for (idx, node) in expected_route.iter().rev().enumerate().skip(1) {
2209                         assert_eq!(expected_next_node, node.node.get_our_node_id());
2210                         let update_next_node = !skip_last || idx != expected_route.len() - 1;
2211                         if next_msgs.is_some() {
2212                                 node.node.handle_update_fail_htlc(&prev_node.node.get_our_node_id(), &next_msgs.as_ref().unwrap().0);
2213                                 commitment_signed_dance!(node, prev_node, next_msgs.as_ref().unwrap().1, update_next_node);
2214                                 if !update_next_node {
2215                                         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 }]);
2216                                 }
2217                         }
2218                         let events = node.node.get_and_clear_pending_msg_events();
2219                         if update_next_node {
2220                                 assert_eq!(events.len(), 1);
2221                                 match events[0] {
2222                                         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 } } => {
2223                                                 assert!(update_add_htlcs.is_empty());
2224                                                 assert!(update_fulfill_htlcs.is_empty());
2225                                                 assert_eq!(update_fail_htlcs.len(), 1);
2226                                                 assert!(update_fail_malformed_htlcs.is_empty());
2227                                                 assert!(update_fee.is_none());
2228                                                 expected_next_node = node_id.clone();
2229                                                 next_msgs = Some((update_fail_htlcs[0].clone(), commitment_signed.clone()));
2230                                         },
2231                                         _ => panic!("Unexpected event"),
2232                                 }
2233                         } else {
2234                                 assert!(events.is_empty());
2235                         }
2236                         if !skip_last && idx == expected_route.len() - 1 {
2237                                 assert_eq!(expected_next_node, origin_node.node.get_our_node_id());
2238                         }
2239
2240                         prev_node = node;
2241                 }
2242
2243                 if !skip_last {
2244                         let prev_node = expected_route.first().unwrap();
2245                         origin_node.node.handle_update_fail_htlc(&prev_node.node.get_our_node_id(), &next_msgs.as_ref().unwrap().0);
2246                         check_added_monitors!(origin_node, 0);
2247                         assert!(origin_node.node.get_and_clear_pending_msg_events().is_empty());
2248                         commitment_signed_dance!(origin_node, prev_node, next_msgs.as_ref().unwrap().1, false);
2249                         let events = origin_node.node.get_and_clear_pending_events();
2250                         assert_eq!(events.len(), 1);
2251                         expected_payment_id = Some(match events[0] {
2252                                 Event::PaymentPathFailed { payment_hash, payment_failed_permanently, all_paths_failed, ref path, ref payment_id, .. } => {
2253                                         assert_eq!(payment_hash, our_payment_hash);
2254                                         assert!(payment_failed_permanently);
2255                                         assert_eq!(all_paths_failed, i == expected_paths.len() - 1);
2256                                         for (idx, hop) in expected_route.iter().enumerate() {
2257                                                 assert_eq!(hop.node.get_our_node_id(), path[idx].pubkey);
2258                                         }
2259                                         payment_id.unwrap()
2260                                 },
2261                                 _ => panic!("Unexpected event"),
2262                         });
2263                 }
2264         }
2265
2266         // Ensure that fail_htlc_backwards is idempotent.
2267         expected_paths[0].last().unwrap().node.fail_htlc_backwards(&our_payment_hash);
2268         assert!(expected_paths[0].last().unwrap().node.get_and_clear_pending_events().is_empty());
2269         assert!(expected_paths[0].last().unwrap().node.get_and_clear_pending_msg_events().is_empty());
2270         check_added_monitors!(expected_paths[0].last().unwrap(), 0);
2271
2272         expected_payment_id
2273 }
2274
2275 pub fn fail_payment<'a, 'b, 'c>(origin_node: &Node<'a, 'b, 'c>, expected_path: &[&Node<'a, 'b, 'c>], our_payment_hash: PaymentHash)  {
2276         fail_payment_along_route(origin_node, &[&expected_path[..]], false, our_payment_hash);
2277 }
2278
2279 pub fn create_chanmon_cfgs(node_count: usize) -> Vec<TestChanMonCfg> {
2280         let mut chan_mon_cfgs = Vec::new();
2281         for i in 0..node_count {
2282                 let tx_broadcaster = test_utils::TestBroadcaster {
2283                         txn_broadcasted: Mutex::new(Vec::new()),
2284                         blocks: Arc::new(Mutex::new(vec![(genesis_block(Network::Testnet), 0)])),
2285                 };
2286                 let fee_estimator = test_utils::TestFeeEstimator { sat_per_kw: Mutex::new(253) };
2287                 let chain_source = test_utils::TestChainSource::new(Network::Testnet);
2288                 let logger = test_utils::TestLogger::with_id(format!("node {}", i));
2289                 let persister = test_utils::TestPersister::new();
2290                 let seed = [i as u8; 32];
2291                 let keys_manager = test_utils::TestKeysInterface::new(&seed, Network::Testnet);
2292
2293                 chan_mon_cfgs.push(TestChanMonCfg { tx_broadcaster, fee_estimator, chain_source, logger, persister, keys_manager });
2294         }
2295
2296         chan_mon_cfgs
2297 }
2298
2299 pub fn create_node_cfgs<'a>(node_count: usize, chanmon_cfgs: &'a Vec<TestChanMonCfg>) -> Vec<NodeCfg<'a>> {
2300         let mut nodes = Vec::new();
2301
2302         for i in 0..node_count {
2303                 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);
2304                 let network_graph = Arc::new(NetworkGraph::new(chanmon_cfgs[i].chain_source.genesis_hash, &chanmon_cfgs[i].logger));
2305                 let seed = [i as u8; 32];
2306                 nodes.push(NodeCfg {
2307                         chain_source: &chanmon_cfgs[i].chain_source,
2308                         logger: &chanmon_cfgs[i].logger,
2309                         tx_broadcaster: &chanmon_cfgs[i].tx_broadcaster,
2310                         fee_estimator: &chanmon_cfgs[i].fee_estimator,
2311                         router: test_utils::TestRouter::new(network_graph.clone()),
2312                         chain_monitor,
2313                         keys_manager: &chanmon_cfgs[i].keys_manager,
2314                         node_seed: seed,
2315                         network_graph,
2316                         override_init_features: Rc::new(RefCell::new(None)),
2317                 });
2318         }
2319
2320         nodes
2321 }
2322
2323 pub fn test_default_channel_config() -> UserConfig {
2324         let mut default_config = UserConfig::default();
2325         // Set cltv_expiry_delta slightly lower to keep the final CLTV values inside one byte in our
2326         // tests so that our script-length checks don't fail (see ACCEPTED_HTLC_SCRIPT_WEIGHT).
2327         default_config.channel_config.cltv_expiry_delta = MIN_CLTV_EXPIRY_DELTA;
2328         default_config.channel_handshake_config.announced_channel = true;
2329         default_config.channel_handshake_limits.force_announced_channel_preference = false;
2330         // When most of our tests were written, the default HTLC minimum was fixed at 1000.
2331         // It now defaults to 1, so we simply set it to the expected value here.
2332         default_config.channel_handshake_config.our_htlc_minimum_msat = 1000;
2333         // When most of our tests were written, we didn't have the notion of a `max_dust_htlc_exposure_msat`,
2334         // It now defaults to 5_000_000 msat; to avoid interfering with tests we bump it to 50_000_000 msat.
2335         default_config.channel_config.max_dust_htlc_exposure_msat = 50_000_000;
2336         default_config
2337 }
2338
2339 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>> {
2340         let mut chanmgrs = Vec::new();
2341         for i in 0..node_count {
2342                 let network = Network::Testnet;
2343                 let params = ChainParameters {
2344                         network,
2345                         best_block: BestBlock::from_genesis(network),
2346                 };
2347                 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,
2348                         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);
2349                 chanmgrs.push(node);
2350         }
2351
2352         chanmgrs
2353 }
2354
2355 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>> {
2356         let mut nodes = Vec::new();
2357         let chan_count = Rc::new(RefCell::new(0));
2358         let payment_count = Rc::new(RefCell::new(0));
2359         let connect_style = Rc::new(RefCell::new(ConnectStyle::random_style()));
2360
2361         for i in 0..node_count {
2362                 let gossip_sync = P2PGossipSync::new(cfgs[i].network_graph.as_ref(), None, cfgs[i].logger);
2363                 nodes.push(Node{
2364                         chain_source: cfgs[i].chain_source, tx_broadcaster: cfgs[i].tx_broadcaster,
2365                         fee_estimator: cfgs[i].fee_estimator, router: &cfgs[i].router,
2366                         chain_monitor: &cfgs[i].chain_monitor, keys_manager: &cfgs[i].keys_manager,
2367                         node: &chan_mgrs[i], network_graph: cfgs[i].network_graph.as_ref(), gossip_sync,
2368                         node_seed: cfgs[i].node_seed, network_chan_count: chan_count.clone(),
2369                         network_payment_count: payment_count.clone(), logger: cfgs[i].logger,
2370                         blocks: Arc::clone(&cfgs[i].tx_broadcaster.blocks),
2371                         connect_style: Rc::clone(&connect_style),
2372                         override_init_features: Rc::clone(&cfgs[i].override_init_features),
2373                 })
2374         }
2375
2376         for i in 0..node_count {
2377                 for j in (i+1)..node_count {
2378                         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();
2379                         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();
2380                 }
2381         }
2382
2383         nodes
2384 }
2385
2386 // Note that the following only works for CLTV values up to 128
2387 pub const ACCEPTED_HTLC_SCRIPT_WEIGHT: usize = 137; //Here we have a diff due to HTLC CLTV expiry being < 2^15 in test
2388
2389 #[derive(PartialEq)]
2390 pub enum HTLCType { NONE, TIMEOUT, SUCCESS }
2391 /// Tests that the given node has broadcast transactions for the given Channel
2392 ///
2393 /// First checks that the latest holder commitment tx has been broadcast, unless an explicit
2394 /// commitment_tx is provided, which may be used to test that a remote commitment tx was
2395 /// broadcast and the revoked outputs were claimed.
2396 ///
2397 /// Next tests that there is (or is not) a transaction that spends the commitment transaction
2398 /// that appears to be the type of HTLC transaction specified in has_htlc_tx.
2399 ///
2400 /// All broadcast transactions must be accounted for in one of the above three types of we'll
2401 /// also fail.
2402 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>  {
2403         let mut node_txn = node.tx_broadcaster.txn_broadcasted.lock().unwrap();
2404         assert!(node_txn.len() >= if commitment_tx.is_some() { 0 } else { 1 } + if has_htlc_tx == HTLCType::NONE { 0 } else { 1 });
2405
2406         let mut res = Vec::with_capacity(2);
2407         node_txn.retain(|tx| {
2408                 if tx.input.len() == 1 && tx.input[0].previous_output.txid == chan.3.txid() {
2409                         check_spends!(tx, chan.3);
2410                         if commitment_tx.is_none() {
2411                                 res.push(tx.clone());
2412                         }
2413                         false
2414                 } else { true }
2415         });
2416         if let Some(explicit_tx) = commitment_tx {
2417                 res.push(explicit_tx.clone());
2418         }
2419
2420         assert_eq!(res.len(), 1);
2421
2422         if has_htlc_tx != HTLCType::NONE {
2423                 node_txn.retain(|tx| {
2424                         if tx.input.len() == 1 && tx.input[0].previous_output.txid == res[0].txid() {
2425                                 check_spends!(tx, res[0]);
2426                                 if has_htlc_tx == HTLCType::TIMEOUT {
2427                                         assert!(tx.lock_time.0 != 0);
2428                                 } else {
2429                                         assert!(tx.lock_time.0 == 0);
2430                                 }
2431                                 res.push(tx.clone());
2432                                 false
2433                         } else { true }
2434                 });
2435                 assert!(res.len() == 2 || res.len() == 3);
2436                 if res.len() == 3 {
2437                         assert_eq!(res[1], res[2]);
2438                 }
2439         }
2440
2441         assert!(node_txn.is_empty());
2442         res
2443 }
2444
2445 /// Tests that the given node has broadcast a claim transaction against the provided revoked
2446 /// HTLC transaction.
2447 pub fn test_revoked_htlc_claim_txn_broadcast<'a, 'b, 'c>(node: &Node<'a, 'b, 'c>, revoked_tx: Transaction, commitment_revoked_tx: Transaction)  {
2448         let mut node_txn = node.tx_broadcaster.txn_broadcasted.lock().unwrap();
2449         // We may issue multiple claiming transaction on revoked outputs due to block rescan
2450         // for revoked htlc outputs
2451         if node_txn.len() != 1 && node_txn.len() != 2 && node_txn.len() != 3 { assert!(false); }
2452         node_txn.retain(|tx| {
2453                 if tx.input.len() == 1 && tx.input[0].previous_output.txid == revoked_tx.txid() {
2454                         check_spends!(tx, revoked_tx);
2455                         false
2456                 } else { true }
2457         });
2458         node_txn.retain(|tx| {
2459                 check_spends!(tx, commitment_revoked_tx);
2460                 false
2461         });
2462         assert!(node_txn.is_empty());
2463 }
2464
2465 pub fn check_preimage_claim<'a, 'b, 'c>(node: &Node<'a, 'b, 'c>, prev_txn: &Vec<Transaction>) -> Vec<Transaction>  {
2466         let mut node_txn = node.tx_broadcaster.txn_broadcasted.lock().unwrap();
2467
2468         assert!(node_txn.len() >= 1);
2469         assert_eq!(node_txn[0].input.len(), 1);
2470         let mut found_prev = false;
2471
2472         for tx in prev_txn {
2473                 if node_txn[0].input[0].previous_output.txid == tx.txid() {
2474                         check_spends!(node_txn[0], tx);
2475                         let mut iter = node_txn[0].input[0].witness.iter();
2476                         iter.next().expect("expected 3 witness items");
2477                         iter.next().expect("expected 3 witness items");
2478                         assert!(iter.next().expect("expected 3 witness items").len() > 106); // must spend an htlc output
2479                         assert_eq!(tx.input.len(), 1); // must spend a commitment tx
2480
2481                         found_prev = true;
2482                         break;
2483                 }
2484         }
2485         assert!(found_prev);
2486
2487         let mut res = Vec::new();
2488         mem::swap(&mut *node_txn, &mut res);
2489         res
2490 }
2491
2492 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)  {
2493         let events_1 = nodes[a].node.get_and_clear_pending_msg_events();
2494         assert_eq!(events_1.len(), 2);
2495         let as_update = match events_1[0] {
2496                 MessageSendEvent::BroadcastChannelUpdate { ref msg } => {
2497                         msg.clone()
2498                 },
2499                 _ => panic!("Unexpected event"),
2500         };
2501         match events_1[1] {
2502                 MessageSendEvent::HandleError { node_id, action: msgs::ErrorAction::SendErrorMessage { ref msg } } => {
2503                         assert_eq!(node_id, nodes[b].node.get_our_node_id());
2504                         assert_eq!(msg.data, expected_error);
2505                         if needs_err_handle {
2506                                 nodes[b].node.handle_error(&nodes[a].node.get_our_node_id(), msg);
2507                         }
2508                 },
2509                 _ => panic!("Unexpected event"),
2510         }
2511
2512         let events_2 = nodes[b].node.get_and_clear_pending_msg_events();
2513         assert_eq!(events_2.len(), if needs_err_handle { 1 } else { 2 });
2514         let bs_update = match events_2[0] {
2515                 MessageSendEvent::BroadcastChannelUpdate { ref msg } => {
2516                         msg.clone()
2517                 },
2518                 _ => panic!("Unexpected event"),
2519         };
2520         if !needs_err_handle {
2521                 match events_2[1] {
2522                         MessageSendEvent::HandleError { node_id, action: msgs::ErrorAction::SendErrorMessage { ref msg } } => {
2523                                 assert_eq!(node_id, nodes[a].node.get_our_node_id());
2524                                 assert_eq!(msg.data, expected_error);
2525                         },
2526                         _ => panic!("Unexpected event"),
2527                 }
2528         }
2529
2530         for node in nodes {
2531                 node.gossip_sync.handle_channel_update(&as_update).unwrap();
2532                 node.gossip_sync.handle_channel_update(&bs_update).unwrap();
2533         }
2534 }
2535
2536 pub fn get_announce_close_broadcast_events<'a, 'b, 'c>(nodes: &Vec<Node<'a, 'b, 'c>>, a: usize, b: usize)  {
2537         handle_announce_close_broadcast_events(nodes, a, b, false, "Channel closed because commitment or closing transaction was confirmed on chain.");
2538 }
2539
2540 #[cfg(test)]
2541 macro_rules! get_channel_value_stat {
2542         ($node: expr, $counterparty_node: expr, $channel_id: expr) => {{
2543                 let peer_state_lock = $node.node.per_peer_state.read().unwrap();
2544                 let chan_lock = peer_state_lock.get(&$counterparty_node.node.get_our_node_id()).unwrap().lock().unwrap();
2545                 let chan = chan_lock.channel_by_id.get(&$channel_id).unwrap();
2546                 chan.get_value_stat()
2547         }}
2548 }
2549
2550 macro_rules! get_chan_reestablish_msgs {
2551         ($src_node: expr, $dst_node: expr) => {
2552                 {
2553                         let mut announcements = $crate::prelude::HashSet::new();
2554                         let mut res = Vec::with_capacity(1);
2555                         for msg in $src_node.node.get_and_clear_pending_msg_events() {
2556                                 if let MessageSendEvent::SendChannelReestablish { ref node_id, ref msg } = msg {
2557                                         assert_eq!(*node_id, $dst_node.node.get_our_node_id());
2558                                         res.push(msg.clone());
2559                                 } else if let MessageSendEvent::SendChannelAnnouncement { ref node_id, ref msg, .. } = msg {
2560                                         assert_eq!(*node_id, $dst_node.node.get_our_node_id());
2561                                         announcements.insert(msg.contents.short_channel_id);
2562                                 } else {
2563                                         panic!("Unexpected event")
2564                                 }
2565                         }
2566                         for chan in $src_node.node.list_channels() {
2567                                 if chan.is_public && chan.counterparty.node_id != $dst_node.node.get_our_node_id() {
2568                                         if let Some(scid) = chan.short_channel_id {
2569                                                 assert!(announcements.remove(&scid));
2570                                         }
2571                                 }
2572                         }
2573                         assert!(announcements.is_empty());
2574                         res
2575                 }
2576         }
2577 }
2578
2579 macro_rules! handle_chan_reestablish_msgs {
2580         ($src_node: expr, $dst_node: expr) => {
2581                 {
2582                         let msg_events = $src_node.node.get_and_clear_pending_msg_events();
2583                         let mut idx = 0;
2584                         let channel_ready = if let Some(&MessageSendEvent::SendChannelReady { ref node_id, ref msg }) = msg_events.get(0) {
2585                                 idx += 1;
2586                                 assert_eq!(*node_id, $dst_node.node.get_our_node_id());
2587                                 Some(msg.clone())
2588                         } else {
2589                                 None
2590                         };
2591
2592                         if let Some(&MessageSendEvent::SendAnnouncementSignatures { ref node_id, msg: _ }) = msg_events.get(idx) {
2593                                 idx += 1;
2594                                 assert_eq!(*node_id, $dst_node.node.get_our_node_id());
2595                         }
2596
2597                         let mut had_channel_update = false; // ChannelUpdate may be now or later, but not both
2598                         if let Some(&MessageSendEvent::SendChannelUpdate { ref node_id, ref msg }) = msg_events.get(idx) {
2599                                 assert_eq!(*node_id, $dst_node.node.get_our_node_id());
2600                                 idx += 1;
2601                                 assert_eq!(msg.contents.flags & 2, 0); // "disabled" flag must not be set as we just reconnected.
2602                                 had_channel_update = true;
2603                         }
2604
2605                         let mut revoke_and_ack = None;
2606                         let mut commitment_update = None;
2607                         let order = if let Some(ev) = msg_events.get(idx) {
2608                                 match ev {
2609                                         &MessageSendEvent::SendRevokeAndACK { ref node_id, ref msg } => {
2610                                                 assert_eq!(*node_id, $dst_node.node.get_our_node_id());
2611                                                 revoke_and_ack = Some(msg.clone());
2612                                                 idx += 1;
2613                                                 RAACommitmentOrder::RevokeAndACKFirst
2614                                         },
2615                                         &MessageSendEvent::UpdateHTLCs { ref node_id, ref updates } => {
2616                                                 assert_eq!(*node_id, $dst_node.node.get_our_node_id());
2617                                                 commitment_update = Some(updates.clone());
2618                                                 idx += 1;
2619                                                 RAACommitmentOrder::CommitmentFirst
2620                                         },
2621                                         _ => RAACommitmentOrder::CommitmentFirst,
2622                                 }
2623                         } else {
2624                                 RAACommitmentOrder::CommitmentFirst
2625                         };
2626
2627                         if let Some(ev) = msg_events.get(idx) {
2628                                 match ev {
2629                                         &MessageSendEvent::SendRevokeAndACK { ref node_id, ref msg } => {
2630                                                 assert_eq!(*node_id, $dst_node.node.get_our_node_id());
2631                                                 assert!(revoke_and_ack.is_none());
2632                                                 revoke_and_ack = Some(msg.clone());
2633                                                 idx += 1;
2634                                         },
2635                                         &MessageSendEvent::UpdateHTLCs { ref node_id, ref updates } => {
2636                                                 assert_eq!(*node_id, $dst_node.node.get_our_node_id());
2637                                                 assert!(commitment_update.is_none());
2638                                                 commitment_update = Some(updates.clone());
2639                                                 idx += 1;
2640                                         },
2641                                         _ => {},
2642                                 }
2643                         }
2644
2645                         if let Some(&MessageSendEvent::SendChannelUpdate { ref node_id, ref msg }) = msg_events.get(idx) {
2646                                 assert_eq!(*node_id, $dst_node.node.get_our_node_id());
2647                                 idx += 1;
2648                                 assert_eq!(msg.contents.flags & 2, 0); // "disabled" flag must not be set as we just reconnected.
2649                                 assert!(!had_channel_update);
2650                         }
2651
2652                         assert_eq!(msg_events.len(), idx);
2653
2654                         (channel_ready, revoke_and_ack, commitment_update, order)
2655                 }
2656         }
2657 }
2658
2659 /// pending_htlc_adds includes both the holding cell and in-flight update_add_htlcs, whereas
2660 /// for claims/fails they are separated out.
2661 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))  {
2662         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();
2663         let reestablish_1 = get_chan_reestablish_msgs!(node_a, node_b);
2664         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();
2665         let reestablish_2 = get_chan_reestablish_msgs!(node_b, node_a);
2666
2667         if send_channel_ready.0 {
2668                 // If a expects a channel_ready, it better not think it has received a revoke_and_ack
2669                 // from b
2670                 for reestablish in reestablish_1.iter() {
2671                         assert_eq!(reestablish.next_remote_commitment_number, 0);
2672                 }
2673         }
2674         if send_channel_ready.1 {
2675                 // If b expects a channel_ready, it better not think it has received a revoke_and_ack
2676                 // from a
2677                 for reestablish in reestablish_2.iter() {
2678                         assert_eq!(reestablish.next_remote_commitment_number, 0);
2679                 }
2680         }
2681         if send_channel_ready.0 || send_channel_ready.1 {
2682                 // If we expect any channel_ready's, both sides better have set
2683                 // next_holder_commitment_number to 1
2684                 for reestablish in reestablish_1.iter() {
2685                         assert_eq!(reestablish.next_local_commitment_number, 1);
2686                 }
2687                 for reestablish in reestablish_2.iter() {
2688                         assert_eq!(reestablish.next_local_commitment_number, 1);
2689                 }
2690         }
2691
2692         let mut resp_1 = Vec::new();
2693         for msg in reestablish_1 {
2694                 node_b.node.handle_channel_reestablish(&node_a.node.get_our_node_id(), &msg);
2695                 resp_1.push(handle_chan_reestablish_msgs!(node_b, node_a));
2696         }
2697         if pending_cell_htlc_claims.0 != 0 || pending_cell_htlc_fails.0 != 0 {
2698                 check_added_monitors!(node_b, 1);
2699         } else {
2700                 check_added_monitors!(node_b, 0);
2701         }
2702
2703         let mut resp_2 = Vec::new();
2704         for msg in reestablish_2 {
2705                 node_a.node.handle_channel_reestablish(&node_b.node.get_our_node_id(), &msg);
2706                 resp_2.push(handle_chan_reestablish_msgs!(node_a, node_b));
2707         }
2708         if pending_cell_htlc_claims.1 != 0 || pending_cell_htlc_fails.1 != 0 {
2709                 check_added_monitors!(node_a, 1);
2710         } else {
2711                 check_added_monitors!(node_a, 0);
2712         }
2713
2714         // We don't yet support both needing updates, as that would require a different commitment dance:
2715         assert!((pending_htlc_adds.0 == 0 && pending_htlc_claims.0 == 0 && pending_htlc_fails.0 == 0 &&
2716                          pending_cell_htlc_claims.0 == 0 && pending_cell_htlc_fails.0 == 0) ||
2717                         (pending_htlc_adds.1 == 0 && pending_htlc_claims.1 == 0 && pending_htlc_fails.1 == 0 &&
2718                          pending_cell_htlc_claims.1 == 0 && pending_cell_htlc_fails.1 == 0));
2719
2720         for chan_msgs in resp_1.drain(..) {
2721                 if send_channel_ready.0 {
2722                         node_a.node.handle_channel_ready(&node_b.node.get_our_node_id(), &chan_msgs.0.unwrap());
2723                         let announcement_event = node_a.node.get_and_clear_pending_msg_events();
2724                         if !announcement_event.is_empty() {
2725                                 assert_eq!(announcement_event.len(), 1);
2726                                 if let MessageSendEvent::SendChannelUpdate { .. } = announcement_event[0] {
2727                                         //TODO: Test announcement_sigs re-sending
2728                                 } else { panic!("Unexpected event! {:?}", announcement_event[0]); }
2729                         }
2730                 } else {
2731                         assert!(chan_msgs.0.is_none());
2732                 }
2733                 if pending_raa.0 {
2734                         assert!(chan_msgs.3 == RAACommitmentOrder::RevokeAndACKFirst);
2735                         node_a.node.handle_revoke_and_ack(&node_b.node.get_our_node_id(), &chan_msgs.1.unwrap());
2736                         assert!(node_a.node.get_and_clear_pending_msg_events().is_empty());
2737                         check_added_monitors!(node_a, 1);
2738                 } else {
2739                         assert!(chan_msgs.1.is_none());
2740                 }
2741                 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 {
2742                         let commitment_update = chan_msgs.2.unwrap();
2743                         if pending_htlc_adds.0 != -1 { // We use -1 to denote a response commitment_signed
2744                                 assert_eq!(commitment_update.update_add_htlcs.len(), pending_htlc_adds.0 as usize);
2745                         } else {
2746                                 assert!(commitment_update.update_add_htlcs.is_empty());
2747                         }
2748                         assert_eq!(commitment_update.update_fulfill_htlcs.len(), pending_htlc_claims.0 + pending_cell_htlc_claims.0);
2749                         assert_eq!(commitment_update.update_fail_htlcs.len(), pending_htlc_fails.0 + pending_cell_htlc_fails.0);
2750                         assert!(commitment_update.update_fail_malformed_htlcs.is_empty());
2751                         for update_add in commitment_update.update_add_htlcs {
2752                                 node_a.node.handle_update_add_htlc(&node_b.node.get_our_node_id(), &update_add);
2753                         }
2754                         for update_fulfill in commitment_update.update_fulfill_htlcs {
2755                                 node_a.node.handle_update_fulfill_htlc(&node_b.node.get_our_node_id(), &update_fulfill);
2756                         }
2757                         for update_fail in commitment_update.update_fail_htlcs {
2758                                 node_a.node.handle_update_fail_htlc(&node_b.node.get_our_node_id(), &update_fail);
2759                         }
2760
2761                         if pending_htlc_adds.0 != -1 { // We use -1 to denote a response commitment_signed
2762                                 commitment_signed_dance!(node_a, node_b, commitment_update.commitment_signed, false);
2763                         } else {
2764                                 node_a.node.handle_commitment_signed(&node_b.node.get_our_node_id(), &commitment_update.commitment_signed);
2765                                 check_added_monitors!(node_a, 1);
2766                                 let as_revoke_and_ack = get_event_msg!(node_a, MessageSendEvent::SendRevokeAndACK, node_b.node.get_our_node_id());
2767                                 // No commitment_signed so get_event_msg's assert(len == 1) passes
2768                                 node_b.node.handle_revoke_and_ack(&node_a.node.get_our_node_id(), &as_revoke_and_ack);
2769                                 assert!(node_b.node.get_and_clear_pending_msg_events().is_empty());
2770                                 check_added_monitors!(node_b, 1);
2771                         }
2772                 } else {
2773                         assert!(chan_msgs.2.is_none());
2774                 }
2775         }
2776
2777         for chan_msgs in resp_2.drain(..) {
2778                 if send_channel_ready.1 {
2779                         node_b.node.handle_channel_ready(&node_a.node.get_our_node_id(), &chan_msgs.0.unwrap());
2780                         let announcement_event = node_b.node.get_and_clear_pending_msg_events();
2781                         if !announcement_event.is_empty() {
2782                                 assert_eq!(announcement_event.len(), 1);
2783                                 match announcement_event[0] {
2784                                         MessageSendEvent::SendChannelUpdate { .. } => {},
2785                                         MessageSendEvent::SendAnnouncementSignatures { .. } => {},
2786                                         _ => panic!("Unexpected event {:?}!", announcement_event[0]),
2787                                 }
2788                         }
2789                 } else {
2790                         assert!(chan_msgs.0.is_none());
2791                 }
2792                 if pending_raa.1 {
2793                         assert!(chan_msgs.3 == RAACommitmentOrder::RevokeAndACKFirst);
2794                         node_b.node.handle_revoke_and_ack(&node_a.node.get_our_node_id(), &chan_msgs.1.unwrap());
2795                         assert!(node_b.node.get_and_clear_pending_msg_events().is_empty());
2796                         check_added_monitors!(node_b, 1);
2797                 } else {
2798                         assert!(chan_msgs.1.is_none());
2799                 }
2800                 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 {
2801                         let commitment_update = chan_msgs.2.unwrap();
2802                         if pending_htlc_adds.1 != -1 { // We use -1 to denote a response commitment_signed
2803                                 assert_eq!(commitment_update.update_add_htlcs.len(), pending_htlc_adds.1 as usize);
2804                         }
2805                         assert_eq!(commitment_update.update_fulfill_htlcs.len(), pending_htlc_claims.1 + pending_cell_htlc_claims.1);
2806                         assert_eq!(commitment_update.update_fail_htlcs.len(), pending_htlc_fails.1 + pending_cell_htlc_fails.1);
2807                         assert!(commitment_update.update_fail_malformed_htlcs.is_empty());
2808                         for update_add in commitment_update.update_add_htlcs {
2809                                 node_b.node.handle_update_add_htlc(&node_a.node.get_our_node_id(), &update_add);
2810                         }
2811                         for update_fulfill in commitment_update.update_fulfill_htlcs {
2812                                 node_b.node.handle_update_fulfill_htlc(&node_a.node.get_our_node_id(), &update_fulfill);
2813                         }
2814                         for update_fail in commitment_update.update_fail_htlcs {
2815                                 node_b.node.handle_update_fail_htlc(&node_a.node.get_our_node_id(), &update_fail);
2816                         }
2817
2818                         if pending_htlc_adds.1 != -1 { // We use -1 to denote a response commitment_signed
2819                                 commitment_signed_dance!(node_b, node_a, commitment_update.commitment_signed, false);
2820                         } else {
2821                                 node_b.node.handle_commitment_signed(&node_a.node.get_our_node_id(), &commitment_update.commitment_signed);
2822                                 check_added_monitors!(node_b, 1);
2823                                 let bs_revoke_and_ack = get_event_msg!(node_b, MessageSendEvent::SendRevokeAndACK, node_a.node.get_our_node_id());
2824                                 // No commitment_signed so get_event_msg's assert(len == 1) passes
2825                                 node_a.node.handle_revoke_and_ack(&node_b.node.get_our_node_id(), &bs_revoke_and_ack);
2826                                 assert!(node_a.node.get_and_clear_pending_msg_events().is_empty());
2827                                 check_added_monitors!(node_a, 1);
2828                         }
2829                 } else {
2830                         assert!(chan_msgs.2.is_none());
2831                 }
2832         }
2833 }