_ 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, chainmonitor::Persist};
  14 use crate::sign::EntropySource;
  15 use crate::chain::channelmonitor::ChannelMonitor;
  16 use crate::chain::transaction::OutPoint;
  17 use crate::events::{ClaimedHTLC, ClosureReason, Event, HTLCDestination, MessageSendEvent, MessageSendEventsProvider, PathFailure, PaymentPurpose, PaymentFailureReason};
  18 use crate::events::bump_transaction::{BumpTransactionEventHandler, Wallet, WalletSource};
  19 use crate::ln::{ChannelId, PaymentPreimage, PaymentHash, PaymentSecret};
  20 use crate::ln::channelmanager::{AChannelManager, ChainParameters, ChannelManager, ChannelManagerReadArgs, RAACommitmentOrder, PaymentSendFailure, RecipientOnionFields, PaymentId, MIN_CLTV_EXPIRY_DELTA};
  21 use crate::routing::gossip::{P2PGossipSync, NetworkGraph, NetworkUpdate};
  22 use crate::routing::router::{self, PaymentParameters, Route, RouteParameters};
  23 use crate::ln::features::InitFeatures;
  24 use crate::ln::msgs;
  25 use crate::ln::msgs::{ChannelMessageHandler,RoutingMessageHandler};
  26 use crate::util::test_channel_signer::TestChannelSigner;
  27 use crate::util::scid_utils;
  28 use crate::util::test_utils;
  29 use crate::util::test_utils::{panicking, TestChainMonitor, TestScorer, TestKeysInterface};
  30 use crate::util::errors::APIError;
  31 use crate::util::config::{UserConfig, MaxDustHTLCExposure};
  32 use crate::util::ser::{ReadableArgs, Writeable};
  33
  34 use bitcoin::blockdata::block::{Block, BlockHeader};
  35 use bitcoin::blockdata::transaction::{Transaction, TxOut};
  36 use bitcoin::hash_types::BlockHash;
  37 use bitcoin::hashes::sha256::Hash as Sha256;
  38 use bitcoin::hashes::Hash as _;
  39 use bitcoin::network::constants::Network;
  40 use bitcoin::secp256k1::{PublicKey, SecretKey};
  41
  42 use crate::io;
  43 use crate::prelude::*;
  44 use core::cell::RefCell;
  45 use alloc::rc::Rc;
  46 use crate::sync::{Arc, Mutex, LockTestExt, RwLock};
  47 use core::mem;
  48 use core::iter::repeat;
  49 use bitcoin::{PackedLockTime, TxIn, TxMerkleNode};
  50
  51 pub const CHAN_CONFIRM_DEPTH: u32 = 10;
  52
  53 /// Mine the given transaction in the next block and then mine CHAN_CONFIRM_DEPTH - 1 blocks on
  54 /// top, giving the given transaction CHAN_CONFIRM_DEPTH confirmations.
  55 ///
  56 /// Returns the SCID a channel confirmed in the given transaction will have, assuming the funding
  57 /// output is the 1st output in the transaction.
  58 pub fn confirm_transaction<'a, 'b, 'c, 'd>(node: &'a Node<'b, 'c, 'd>, tx: &Transaction) -> u64 {
  59         let scid = confirm_transaction_at(node, tx, node.best_block_info().1 + 1);
  60         connect_blocks(node, CHAN_CONFIRM_DEPTH - 1);
  61         scid
  62 }
  63 /// Mine a single block containing the given transaction
  64 ///
  65 /// Returns the SCID a channel confirmed in the given transaction will have, assuming the funding
  66 /// output is the 1st output in the transaction.
  67 pub fn mine_transaction<'a, 'b, 'c, 'd>(node: &'a Node<'b, 'c, 'd>, tx: &Transaction) -> u64 {
  68         let height = node.best_block_info().1 + 1;
  69         confirm_transaction_at(node, tx, height)
  70 }
  71 /// Mine a single block containing the given transactions
  72 pub fn mine_transactions<'a, 'b, 'c, 'd>(node: &'a Node<'b, 'c, 'd>, txn: &[&Transaction]) {
  73         let height = node.best_block_info().1 + 1;
  74         confirm_transactions_at(node, txn, height);
  75 }
  76 /// Mine a single block containing the given transaction without extra consistency checks which may
  77 /// impact ChannelManager state.
  78 pub fn mine_transaction_without_consistency_checks<'a, 'b, 'c, 'd>(node: &'a Node<'b, 'c, 'd>, tx: &Transaction) {
  79         let height = node.best_block_info().1 + 1;
  80         let mut block = Block {
  81                 header: BlockHeader { version: 0x20000000, prev_blockhash: node.best_block_hash(), merkle_root: TxMerkleNode::all_zeros(), time: height, bits: 42, nonce: 42 },
  82                 txdata: Vec::new(),
  83         };
  84         for _ in 0..*node.network_chan_count.borrow() { // Make sure we don't end up with channels at the same short id by offsetting by chan_count
  85                 block.txdata.push(Transaction { version: 0, lock_time: PackedLockTime::ZERO, input: Vec::new(), output: Vec::new() });
  86         }
  87         block.txdata.push((*tx).clone());
  88         do_connect_block_without_consistency_checks(node, block, false);
  89 }
  90 /// Mine the given transaction at the given height, mining blocks as required to build to that
  91 /// height
  92 ///
  93 /// Returns the SCID a channel confirmed in the given transaction will have, assuming the funding
  94 /// output is the 1st output in the transaction.
  95 pub fn confirm_transactions_at<'a, 'b, 'c, 'd>(node: &'a Node<'b, 'c, 'd>, txn: &[&Transaction], conf_height: u32) -> u64 {
  96         let first_connect_height = node.best_block_info().1 + 1;
  97         assert!(first_connect_height <= conf_height);
  98         if conf_height > first_connect_height {
  99                 connect_blocks(node, conf_height - first_connect_height);
 100         }
 101         let mut txdata = Vec::new();
 102         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
 103                 txdata.push(Transaction { version: 0, lock_time: PackedLockTime::ZERO, input: Vec::new(), output: Vec::new() });
 104         }
 105         for tx in txn {
 106                 txdata.push((*tx).clone());
 107         }
 108         let block = create_dummy_block(node.best_block_hash(), conf_height, txdata);
 109         connect_block(node, &block);
 110         scid_utils::scid_from_parts(conf_height as u64, block.txdata.len() as u64 - 1, 0).unwrap()
 111 }
 112 pub fn confirm_transaction_at<'a, 'b, 'c, 'd>(node: &'a Node<'b, 'c, 'd>, tx: &Transaction, conf_height: u32) -> u64 {
 113         confirm_transactions_at(node, &[tx], conf_height)
 114 }
 115
 116 /// The possible ways we may notify a ChannelManager of a new block
 117 #[derive(Clone, Copy, Debug, PartialEq)]
 118 pub enum ConnectStyle {
 119         /// Calls `best_block_updated` first, detecting transactions in the block only after receiving
 120         /// the header and height information.
 121         BestBlockFirst,
 122         /// The same as `BestBlockFirst`, however when we have multiple blocks to connect, we only
 123         /// make a single `best_block_updated` call.
 124         BestBlockFirstSkippingBlocks,
 125         /// The same as `BestBlockFirst` when connecting blocks. During disconnection only
 126         /// `transaction_unconfirmed` is called.
 127         BestBlockFirstReorgsOnlyTip,
 128         /// Calls `transactions_confirmed` first, detecting transactions in the block before updating
 129         /// the header and height information.
 130         TransactionsFirst,
 131         /// The same as `TransactionsFirst`, however when we have multiple blocks to connect, we only
 132         /// make a single `best_block_updated` call.
 133         TransactionsFirstSkippingBlocks,
 134         /// The same as `TransactionsFirst`, however when we have multiple blocks to connect, we only
 135         /// make a single `best_block_updated` call. Further, we call `transactions_confirmed` multiple
 136         /// times to ensure it's idempotent.
 137         TransactionsDuplicativelyFirstSkippingBlocks,
 138         /// The same as `TransactionsFirst`, however when we have multiple blocks to connect, we only
 139         /// make a single `best_block_updated` call. Further, we call `transactions_confirmed` multiple
 140         /// times to ensure it's idempotent.
 141         HighlyRedundantTransactionsFirstSkippingBlocks,
 142         /// The same as `TransactionsFirst` when connecting blocks. During disconnection only
 143         /// `transaction_unconfirmed` is called.
 144         TransactionsFirstReorgsOnlyTip,
 145         /// Provides the full block via the `chain::Listen` interface. In the current code this is
 146         /// equivalent to `TransactionsFirst` with some additional assertions.
 147         FullBlockViaListen,
 148 }
 149
 150 impl ConnectStyle {
 151         pub fn skips_blocks(&self) -> bool {
 152                 match self {
 153                         ConnectStyle::BestBlockFirst => false,
 154                         ConnectStyle::BestBlockFirstSkippingBlocks => true,
 155                         ConnectStyle::BestBlockFirstReorgsOnlyTip => true,
 156                         ConnectStyle::TransactionsFirst => false,
 157                         ConnectStyle::TransactionsFirstSkippingBlocks => true,
 158                         ConnectStyle::TransactionsDuplicativelyFirstSkippingBlocks => true,
 159                         ConnectStyle::HighlyRedundantTransactionsFirstSkippingBlocks => true,
 160                         ConnectStyle::TransactionsFirstReorgsOnlyTip => true,
 161                         ConnectStyle::FullBlockViaListen => false,
 162                 }
 163         }
 164
 165         pub fn updates_best_block_first(&self) -> bool {
 166                 match self {
 167                         ConnectStyle::BestBlockFirst => true,
 168                         ConnectStyle::BestBlockFirstSkippingBlocks => true,
 169                         ConnectStyle::BestBlockFirstReorgsOnlyTip => true,
 170                         ConnectStyle::TransactionsFirst => false,
 171                         ConnectStyle::TransactionsFirstSkippingBlocks => false,
 172                         ConnectStyle::TransactionsDuplicativelyFirstSkippingBlocks => false,
 173                         ConnectStyle::HighlyRedundantTransactionsFirstSkippingBlocks => false,
 174                         ConnectStyle::TransactionsFirstReorgsOnlyTip => false,
 175                         ConnectStyle::FullBlockViaListen => false,
 176                 }
 177         }
 178
 179         fn random_style() -> ConnectStyle {
 180                 #[cfg(feature = "std")] {
 181                         use core::hash::{BuildHasher, Hasher};
 182                         // Get a random value using the only std API to do so - the DefaultHasher
 183                         let rand_val = std::collections::hash_map::RandomState::new().build_hasher().finish();
 184                         let res = match rand_val % 9 {
 185                                 0 => ConnectStyle::BestBlockFirst,
 186                                 1 => ConnectStyle::BestBlockFirstSkippingBlocks,
 187                                 2 => ConnectStyle::BestBlockFirstReorgsOnlyTip,
 188                                 3 => ConnectStyle::TransactionsFirst,
 189                                 4 => ConnectStyle::TransactionsFirstSkippingBlocks,
 190                                 5 => ConnectStyle::TransactionsDuplicativelyFirstSkippingBlocks,
 191                                 6 => ConnectStyle::HighlyRedundantTransactionsFirstSkippingBlocks,
 192                                 7 => ConnectStyle::TransactionsFirstReorgsOnlyTip,
 193                                 8 => ConnectStyle::FullBlockViaListen,
 194                                 _ => unreachable!(),
 195                         };
 196                         eprintln!("Using Block Connection Style: {:?}", res);
 197                         res
 198                 }
 199                 #[cfg(not(feature = "std"))] {
 200                         ConnectStyle::FullBlockViaListen
 201                 }
 202         }
 203 }
 204
 205 pub fn create_dummy_header(prev_blockhash: BlockHash, time: u32) -> BlockHeader {
 206         BlockHeader {
 207                 version: 0x2000_0000,
 208                 prev_blockhash,
 209                 merkle_root: TxMerkleNode::all_zeros(),
 210                 time,
 211                 bits: 42,
 212                 nonce: 42,
 213         }
 214 }
 215
 216 pub fn create_dummy_block(prev_blockhash: BlockHash, time: u32, txdata: Vec<Transaction>) -> Block {
 217         Block { header: create_dummy_header(prev_blockhash, time), txdata }
 218 }
 219
 220 pub fn connect_blocks<'a, 'b, 'c, 'd>(node: &'a Node<'b, 'c, 'd>, depth: u32) -> BlockHash {
 221         let skip_intermediaries = node.connect_style.borrow().skips_blocks();
 222
 223         let height = node.best_block_info().1 + 1;
 224         let mut block = create_dummy_block(node.best_block_hash(), height, Vec::new());
 225         assert!(depth >= 1);
 226         for i in 1..depth {
 227                 let prev_blockhash = block.header.block_hash();
 228                 do_connect_block_with_consistency_checks(node, block, skip_intermediaries);
 229                 block = create_dummy_block(prev_blockhash, height + i, Vec::new());
 230         }
 231         let hash = block.header.block_hash();
 232         do_connect_block_with_consistency_checks(node, block, false);
 233         hash
 234 }
 235
 236 pub fn connect_block<'a, 'b, 'c, 'd>(node: &'a Node<'b, 'c, 'd>, block: &Block) {
 237         do_connect_block_with_consistency_checks(node, block.clone(), false);
 238 }
 239
 240 fn call_claimable_balances<'a, 'b, 'c, 'd>(node: &'a Node<'b, 'c, 'd>) {
 241         // Ensure `get_claimable_balances`' self-tests never panic
 242         for funding_outpoint in node.chain_monitor.chain_monitor.list_monitors() {
 243                 node.chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances();
 244         }
 245 }
 246
 247 fn do_connect_block_with_consistency_checks<'a, 'b, 'c, 'd>(node: &'a Node<'b, 'c, 'd>, block: Block, skip_intermediaries: bool) {
 248         call_claimable_balances(node);
 249         do_connect_block_without_consistency_checks(node, block, skip_intermediaries);
 250         call_claimable_balances(node);
 251         node.node.test_process_background_events();
 252 }
 253
 254 fn do_connect_block_without_consistency_checks<'a, 'b, 'c, 'd>(node: &'a Node<'b, 'c, 'd>, block: Block, skip_intermediaries: bool) {
 255         let height = node.best_block_info().1 + 1;
 256         #[cfg(feature = "std")] {
 257                 eprintln!("Connecting block using Block Connection Style: {:?}", *node.connect_style.borrow());
 258         }
 259         // Update the block internally before handing it over to LDK, to ensure our assertions regarding
 260         // transaction broadcast are correct.
 261         node.blocks.lock().unwrap().push((block.clone(), height));
 262         if !skip_intermediaries {
 263                 let txdata: Vec<_> = block.txdata.iter().enumerate().collect();
 264                 match *node.connect_style.borrow() {
 265                         ConnectStyle::BestBlockFirst|ConnectStyle::BestBlockFirstSkippingBlocks|ConnectStyle::BestBlockFirstReorgsOnlyTip => {
 266                                 node.chain_monitor.chain_monitor.best_block_updated(&block.header, height);
 267                                 call_claimable_balances(node);
 268                                 node.chain_monitor.chain_monitor.transactions_confirmed(&block.header, &txdata, height);
 269                                 node.node.best_block_updated(&block.header, height);
 270                                 node.node.transactions_confirmed(&block.header, &txdata, height);
 271                         },
 272                         ConnectStyle::TransactionsFirst|ConnectStyle::TransactionsFirstSkippingBlocks|
 273                         ConnectStyle::TransactionsDuplicativelyFirstSkippingBlocks|ConnectStyle::HighlyRedundantTransactionsFirstSkippingBlocks|
 274                         ConnectStyle::TransactionsFirstReorgsOnlyTip => {
 275                                 if *node.connect_style.borrow() == ConnectStyle::HighlyRedundantTransactionsFirstSkippingBlocks {
 276                                         let mut connections = Vec::new();
 277                                         for (block, height) in node.blocks.lock().unwrap().iter() {
 278                                                 if !block.txdata.is_empty() {
 279                                                         // Reconnect all transactions we've ever seen to ensure transaction connection
 280                                                         // is *really* idempotent. This is a somewhat likely deployment for some
 281                                                         // esplora implementations of chain sync which try to reduce state and
 282                                                         // complexity as much as possible.
 283                                                         //
 284                                                         // Sadly we have to clone the block here to maintain lockorder. In the
 285                                                         // future we should consider Arc'ing the blocks to avoid this.
 286                                                         connections.push((block.clone(), *height));
 287                                                 }
 288                                         }
 289                                         for (old_block, height) in connections {
 290                                                 node.chain_monitor.chain_monitor.transactions_confirmed(&old_block.header,
 291                                                         &old_block.txdata.iter().enumerate().collect::<Vec<_>>(), height);
 292                                         }
 293                                 }
 294                                 node.chain_monitor.chain_monitor.transactions_confirmed(&block.header, &txdata, height);
 295                                 if *node.connect_style.borrow() == ConnectStyle::TransactionsDuplicativelyFirstSkippingBlocks {
 296                                         node.chain_monitor.chain_monitor.transactions_confirmed(&block.header, &txdata, height);
 297                                 }
 298                                 call_claimable_balances(node);
 299                                 node.chain_monitor.chain_monitor.best_block_updated(&block.header, height);
 300                                 node.node.transactions_confirmed(&block.header, &txdata, height);
 301                                 node.node.best_block_updated(&block.header, height);
 302                         },
 303                         ConnectStyle::FullBlockViaListen => {
 304                                 node.chain_monitor.chain_monitor.block_connected(&block, height);
 305                                 node.node.block_connected(&block, height);
 306                         }
 307                 }
 308         }
 309
 310         for tx in &block.txdata {
 311                 for input in &tx.input {
 312                         node.wallet_source.remove_utxo(input.previous_output);
 313                 }
 314                 let wallet_script = node.wallet_source.get_change_script().unwrap();
 315                 for (idx, output) in tx.output.iter().enumerate() {
 316                         if output.script_pubkey == wallet_script {
 317                                 let outpoint = bitcoin::OutPoint { txid: tx.txid(), vout: idx as u32 };
 318                                 node.wallet_source.add_utxo(outpoint, output.value);
 319                         }
 320                 }
 321         }
 322 }
 323
 324 pub fn disconnect_blocks<'a, 'b, 'c, 'd>(node: &'a Node<'b, 'c, 'd>, count: u32) {
 325         call_claimable_balances(node);
 326         #[cfg(feature = "std")] {
 327                 eprintln!("Disconnecting {} blocks using Block Connection Style: {:?}", count, *node.connect_style.borrow());
 328         }
 329         for i in 0..count {
 330                 let orig = node.blocks.lock().unwrap().pop().unwrap();
 331                 assert!(orig.1 > 0); // Cannot disconnect genesis
 332                 let prev = node.blocks.lock().unwrap().last().unwrap().clone();
 333
 334                 match *node.connect_style.borrow() {
 335                         ConnectStyle::FullBlockViaListen => {
 336                                 node.chain_monitor.chain_monitor.block_disconnected(&orig.0.header, orig.1);
 337                                 Listen::block_disconnected(node.node, &orig.0.header, orig.1);
 338                         },
 339                         ConnectStyle::BestBlockFirstSkippingBlocks|ConnectStyle::TransactionsFirstSkippingBlocks|
 340                         ConnectStyle::HighlyRedundantTransactionsFirstSkippingBlocks|ConnectStyle::TransactionsDuplicativelyFirstSkippingBlocks => {
 341                                 if i == count - 1 {
 342                                         node.chain_monitor.chain_monitor.best_block_updated(&prev.0.header, prev.1);
 343                                         node.node.best_block_updated(&prev.0.header, prev.1);
 344                                 }
 345                         },
 346                         ConnectStyle::BestBlockFirstReorgsOnlyTip|ConnectStyle::TransactionsFirstReorgsOnlyTip => {
 347                                 for tx in orig.0.txdata {
 348                                         node.chain_monitor.chain_monitor.transaction_unconfirmed(&tx.txid());
 349                                         node.node.transaction_unconfirmed(&tx.txid());
 350                                 }
 351                         },
 352                         _ => {
 353                                 node.chain_monitor.chain_monitor.best_block_updated(&prev.0.header, prev.1);
 354                                 node.node.best_block_updated(&prev.0.header, prev.1);
 355                         },
 356                 }
 357                 call_claimable_balances(node);
 358         }
 359 }
 360
 361 pub fn disconnect_all_blocks<'a, 'b, 'c, 'd>(node: &'a Node<'b, 'c, 'd>) {
 362         let count = node.blocks.lock().unwrap().len() as u32 - 1;
 363         disconnect_blocks(node, count);
 364 }
 365
 366 pub struct TestChanMonCfg {
 367         pub tx_broadcaster: test_utils::TestBroadcaster,
 368         pub fee_estimator: test_utils::TestFeeEstimator,
 369         pub chain_source: test_utils::TestChainSource,
 370         pub persister: test_utils::TestPersister,
 371         pub logger: test_utils::TestLogger,
 372         pub keys_manager: test_utils::TestKeysInterface,
 373         pub scorer: RwLock<test_utils::TestScorer>,
 374 }
 375
 376 pub struct NodeCfg<'a> {
 377         pub chain_source: &'a test_utils::TestChainSource,
 378         pub tx_broadcaster: &'a test_utils::TestBroadcaster,
 379         pub fee_estimator: &'a test_utils::TestFeeEstimator,
 380         pub router: test_utils::TestRouter<'a>,
 381         pub chain_monitor: test_utils::TestChainMonitor<'a>,
 382         pub keys_manager: &'a test_utils::TestKeysInterface,
 383         pub logger: &'a test_utils::TestLogger,
 384         pub network_graph: Arc<NetworkGraph<&'a test_utils::TestLogger>>,
 385         pub node_seed: [u8; 32],
 386         pub override_init_features: Rc<RefCell<Option<InitFeatures>>>,
 387 }
 388
 389 type TestChannelManager<'node_cfg, 'chan_mon_cfg> = ChannelManager<
 390         &'node_cfg TestChainMonitor<'chan_mon_cfg>,
 391         &'chan_mon_cfg test_utils::TestBroadcaster,
 392         &'node_cfg test_utils::TestKeysInterface,
 393         &'node_cfg test_utils::TestKeysInterface,
 394         &'node_cfg test_utils::TestKeysInterface,
 395         &'chan_mon_cfg test_utils::TestFeeEstimator,
 396         &'node_cfg test_utils::TestRouter<'chan_mon_cfg>,
 397         &'chan_mon_cfg test_utils::TestLogger,
 398 >;
 399
 400 pub struct Node<'chan_man, 'node_cfg: 'chan_man, 'chan_mon_cfg: 'node_cfg> {
 401         pub chain_source: &'chan_mon_cfg test_utils::TestChainSource,
 402         pub tx_broadcaster: &'chan_mon_cfg test_utils::TestBroadcaster,
 403         pub fee_estimator: &'chan_mon_cfg test_utils::TestFeeEstimator,
 404         pub router: &'node_cfg test_utils::TestRouter<'chan_mon_cfg>,
 405         pub chain_monitor: &'node_cfg test_utils::TestChainMonitor<'chan_mon_cfg>,
 406         pub keys_manager: &'chan_mon_cfg test_utils::TestKeysInterface,
 407         pub node: &'chan_man TestChannelManager<'node_cfg, 'chan_mon_cfg>,
 408         pub network_graph: &'node_cfg NetworkGraph<&'chan_mon_cfg test_utils::TestLogger>,
 409         pub gossip_sync: P2PGossipSync<&'node_cfg NetworkGraph<&'chan_mon_cfg test_utils::TestLogger>, &'chan_mon_cfg test_utils::TestChainSource, &'chan_mon_cfg test_utils::TestLogger>,
 410         pub node_seed: [u8; 32],
 411         pub network_payment_count: Rc<RefCell<u8>>,
 412         pub network_chan_count: Rc<RefCell<u32>>,
 413         pub logger: &'chan_mon_cfg test_utils::TestLogger,
 414         pub blocks: Arc<Mutex<Vec<(Block, u32)>>>,
 415         pub connect_style: Rc<RefCell<ConnectStyle>>,
 416         pub override_init_features: Rc<RefCell<Option<InitFeatures>>>,
 417         pub wallet_source: Arc<test_utils::TestWalletSource>,
 418         pub bump_tx_handler: BumpTransactionEventHandler<
 419                 &'chan_mon_cfg test_utils::TestBroadcaster,
 420                 Arc<Wallet<Arc<test_utils::TestWalletSource>, &'chan_mon_cfg test_utils::TestLogger>>,
 421                 &'chan_mon_cfg test_utils::TestKeysInterface,
 422                 &'chan_mon_cfg test_utils::TestLogger,
 423         >,
 424 }
 425 impl<'a, 'b, 'c> Node<'a, 'b, 'c> {
 426         pub fn best_block_hash(&self) -> BlockHash {
 427                 self.blocks.lock().unwrap().last().unwrap().0.block_hash()
 428         }
 429         pub fn best_block_info(&self) -> (BlockHash, u32) {
 430                 self.blocks.lock().unwrap().last().map(|(a, b)| (a.block_hash(), *b)).unwrap()
 431         }
 432         pub fn get_block_header(&self, height: u32) -> BlockHeader {
 433                 self.blocks.lock().unwrap()[height as usize].0.header
 434         }
 435 }
 436
 437 /// If we need an unsafe pointer to a `Node` (ie to reference it in a thread
 438 /// pre-std::thread::scope), this provides that with `Sync`. Note that accessing some of the fields
 439 /// in the `Node` are not safe to use (i.e. the ones behind an `Rc`), but that's left to the caller
 440 /// to figure out.
 441 pub struct NodePtr(pub *const Node<'static, 'static, 'static>);
 442 impl NodePtr {
 443         pub fn from_node<'a, 'b: 'a, 'c: 'b>(node: &Node<'a, 'b, 'c>) -> Self {
 444                 Self((node as *const Node<'a, 'b, 'c>).cast())
 445         }
 446 }
 447 unsafe impl Send for NodePtr {}
 448 unsafe impl Sync for NodePtr {}
 449
 450
 451 pub trait NodeHolder {
 452         type CM: AChannelManager;
 453         fn node(&self) -> &ChannelManager<
 454                 <Self::CM as AChannelManager>::M,
 455                 <Self::CM as AChannelManager>::T,
 456                 <Self::CM as AChannelManager>::ES,
 457                 <Self::CM as AChannelManager>::NS,
 458                 <Self::CM as AChannelManager>::SP,
 459                 <Self::CM as AChannelManager>::F,
 460                 <Self::CM as AChannelManager>::R,
 461                 <Self::CM as AChannelManager>::L>;
 462         fn chain_monitor(&self) -> Option<&test_utils::TestChainMonitor>;
 463 }
 464 impl<H: NodeHolder> NodeHolder for &H {
 465         type CM = H::CM;
 466         fn node(&self) -> &ChannelManager<
 467                 <Self::CM as AChannelManager>::M,
 468                 <Self::CM as AChannelManager>::T,
 469                 <Self::CM as AChannelManager>::ES,
 470                 <Self::CM as AChannelManager>::NS,
 471                 <Self::CM as AChannelManager>::SP,
 472                 <Self::CM as AChannelManager>::F,
 473                 <Self::CM as AChannelManager>::R,
 474                 <Self::CM as AChannelManager>::L> { (*self).node() }
 475         fn chain_monitor(&self) -> Option<&test_utils::TestChainMonitor> { (*self).chain_monitor() }
 476 }
 477 impl<'a, 'b: 'a, 'c: 'b> NodeHolder for Node<'a, 'b, 'c> {
 478         type CM = TestChannelManager<'b, 'c>;
 479         fn node(&self) -> &TestChannelManager<'b, 'c> { &self.node }
 480         fn chain_monitor(&self) -> Option<&test_utils::TestChainMonitor> { Some(self.chain_monitor) }
 481 }
 482
 483 impl<'a, 'b, 'c> Drop for Node<'a, 'b, 'c> {
 484         fn drop(&mut self) {
 485                 if !panicking() {
 486                         // Check that we processed all pending events
 487                         let msg_events = self.node.get_and_clear_pending_msg_events();
 488                         if !msg_events.is_empty() {
 489                                 panic!("Had excess message events on node {}: {:?}", self.logger.id, msg_events);
 490                         }
 491                         let events = self.node.get_and_clear_pending_events();
 492                         if !events.is_empty() {
 493                                 panic!("Had excess events on node {}: {:?}", self.logger.id, events);
 494                         }
 495                         let added_monitors = self.chain_monitor.added_monitors.lock().unwrap().split_off(0);
 496                         if !added_monitors.is_empty() {
 497                                 panic!("Had {} excess added monitors on node {}", added_monitors.len(), self.logger.id);
 498                         }
 499
 500                         // Check that if we serialize the network graph, we can deserialize it again.
 501                         let network_graph = {
 502                                 let mut w = test_utils::TestVecWriter(Vec::new());
 503                                 self.network_graph.write(&mut w).unwrap();
 504                                 let network_graph_deser = <NetworkGraph<_>>::read(&mut io::Cursor::new(&w.0), self.logger).unwrap();
 505                                 assert!(network_graph_deser == *self.network_graph);
 506                                 let gossip_sync = P2PGossipSync::new(
 507                                         &network_graph_deser, Some(self.chain_source), self.logger
 508                                 );
 509                                 let mut chan_progress = 0;
 510                                 loop {
 511                                         let orig_announcements = self.gossip_sync.get_next_channel_announcement(chan_progress);
 512                                         let deserialized_announcements = gossip_sync.get_next_channel_announcement(chan_progress);
 513                                         assert!(orig_announcements == deserialized_announcements);
 514                                         chan_progress = match orig_announcements {
 515                                                 Some(announcement) => announcement.0.contents.short_channel_id + 1,
 516                                                 None => break,
 517                                         };
 518                                 }
 519                                 let mut node_progress = None;
 520                                 loop {
 521                                         let orig_announcements = self.gossip_sync.get_next_node_announcement(node_progress.as_ref());
 522                                         let deserialized_announcements = gossip_sync.get_next_node_announcement(node_progress.as_ref());
 523                                         assert!(orig_announcements == deserialized_announcements);
 524                                         node_progress = match orig_announcements {
 525                                                 Some(announcement) => Some(announcement.contents.node_id),
 526                                                 None => break,
 527                                         };
 528                                 }
 529                                 network_graph_deser
 530                         };
 531
 532                         // Check that if we serialize and then deserialize all our channel monitors we get the
 533                         // same set of outputs to watch for on chain as we have now. Note that if we write
 534                         // tests that fully close channels and remove the monitors at some point this may break.
 535                         let feeest = test_utils::TestFeeEstimator { sat_per_kw: Mutex::new(253) };
 536                         let mut deserialized_monitors = Vec::new();
 537                         {
 538                                 for outpoint in self.chain_monitor.chain_monitor.list_monitors() {
 539                                         let mut w = test_utils::TestVecWriter(Vec::new());
 540                                         self.chain_monitor.chain_monitor.get_monitor(outpoint).unwrap().write(&mut w).unwrap();
 541                                         let (_, deserialized_monitor) = <(BlockHash, ChannelMonitor<TestChannelSigner>)>::read(
 542                                                 &mut io::Cursor::new(&w.0), (self.keys_manager, self.keys_manager)).unwrap();
 543                                         deserialized_monitors.push(deserialized_monitor);
 544                                 }
 545                         }
 546
 547                         let broadcaster = test_utils::TestBroadcaster {
 548                                 txn_broadcasted: Mutex::new(self.tx_broadcaster.txn_broadcasted.lock().unwrap().clone()),
 549                                 blocks: Arc::new(Mutex::new(self.tx_broadcaster.blocks.lock().unwrap().clone())),
 550                         };
 551
 552                         // Before using all the new monitors to check the watch outpoints, use the full set of
 553                         // them to ensure we can write and reload our ChannelManager.
 554                         {
 555                                 let mut channel_monitors = HashMap::new();
 556                                 for monitor in deserialized_monitors.iter_mut() {
 557                                         channel_monitors.insert(monitor.get_funding_txo().0, monitor);
 558                                 }
 559
 560                                 let scorer = RwLock::new(test_utils::TestScorer::new());
 561                                 let mut w = test_utils::TestVecWriter(Vec::new());
 562                                 self.node.write(&mut w).unwrap();
 563                                 <(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 {
 564                                         default_config: *self.node.get_current_default_configuration(),
 565                                         entropy_source: self.keys_manager,
 566                                         node_signer: self.keys_manager,
 567                                         signer_provider: self.keys_manager,
 568                                         fee_estimator: &test_utils::TestFeeEstimator { sat_per_kw: Mutex::new(253) },
 569                                         router: &test_utils::TestRouter::new(Arc::new(network_graph), &scorer),
 570                                         chain_monitor: self.chain_monitor,
 571                                         tx_broadcaster: &broadcaster,
 572                                         logger: &self.logger,
 573                                         channel_monitors,
 574                                 }).unwrap();
 575                         }
 576
 577                         let persister = test_utils::TestPersister::new();
 578                         let chain_source = test_utils::TestChainSource::new(Network::Testnet);
 579                         let chain_monitor = test_utils::TestChainMonitor::new(Some(&chain_source), &broadcaster, &self.logger, &feeest, &persister, &self.keys_manager);
 580                         for deserialized_monitor in deserialized_monitors.drain(..) {
 581                                 if chain_monitor.watch_channel(deserialized_monitor.get_funding_txo().0, deserialized_monitor) != ChannelMonitorUpdateStatus::Completed {
 582                                         panic!();
 583                                 }
 584                         }
 585                         assert_eq!(*chain_source.watched_txn.unsafe_well_ordered_double_lock_self(), *self.chain_source.watched_txn.unsafe_well_ordered_double_lock_self());
 586                         assert_eq!(*chain_source.watched_outputs.unsafe_well_ordered_double_lock_self(), *self.chain_source.watched_outputs.unsafe_well_ordered_double_lock_self());
 587                 }
 588         }
 589 }
 590
 591 pub fn create_chan_between_nodes<'a, 'b, 'c: 'd, 'd>(node_a: &'a Node<'b, 'c, 'd>, node_b: &'a Node<'b, 'c, 'd>) -> (msgs::ChannelAnnouncement, msgs::ChannelUpdate, msgs::ChannelUpdate, ChannelId, Transaction) {
 592         create_chan_between_nodes_with_value(node_a, node_b, 100000, 10001)
 593 }
 594
 595 pub fn create_chan_between_nodes_with_value<'a, 'b, 'c: 'd, '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, ChannelId, Transaction) {
 596         let (channel_ready, channel_id, tx) = create_chan_between_nodes_with_value_a(node_a, node_b, channel_value, push_msat);
 597         let (announcement, as_update, bs_update) = create_chan_between_nodes_with_value_b(node_a, node_b, &channel_ready);
 598         (announcement, as_update, bs_update, channel_id, tx)
 599 }
 600
 601 /// Gets an RAA and CS which were sent in response to a commitment update
 602 pub fn get_revoke_commit_msgs<CM: AChannelManager, H: NodeHolder<CM=CM>>(node: &H, recipient: &PublicKey) -> (msgs::RevokeAndACK, msgs::CommitmentSigned) {
 603         let events = node.node().get_and_clear_pending_msg_events();
 604         assert_eq!(events.len(), 2);
 605         (match events[0] {
 606                 MessageSendEvent::SendRevokeAndACK { ref node_id, ref msg } => {
 607                         assert_eq!(node_id, recipient);
 608                         (*msg).clone()
 609                 },
 610                 _ => panic!("Unexpected event"),
 611         }, match events[1] {
 612                 MessageSendEvent::UpdateHTLCs { ref node_id, ref updates } => {
 613                         assert_eq!(node_id, recipient);
 614                         assert!(updates.update_add_htlcs.is_empty());
 615                         assert!(updates.update_fulfill_htlcs.is_empty());
 616                         assert!(updates.update_fail_htlcs.is_empty());
 617                         assert!(updates.update_fail_malformed_htlcs.is_empty());
 618                         assert!(updates.update_fee.is_none());
 619                         updates.commitment_signed.clone()
 620                 },
 621                 _ => panic!("Unexpected event"),
 622         })
 623 }
 624
 625 #[macro_export]
 626 /// Gets an RAA and CS which were sent in response to a commitment update
 627 ///
 628 /// Don't use this, use the identically-named function instead.
 629 macro_rules! get_revoke_commit_msgs {
 630         ($node: expr, $node_id: expr) => {
 631                 $crate::ln::functional_test_utils::get_revoke_commit_msgs(&$node, &$node_id)
 632         }
 633 }
 634
 635 /// Get an specific event message from the pending events queue.
 636 #[macro_export]
 637 macro_rules! get_event_msg {
 638         ($node: expr, $event_type: path, $node_id: expr) => {
 639                 {
 640                         let events = $node.node.get_and_clear_pending_msg_events();
 641                         assert_eq!(events.len(), 1);
 642                         match events[0] {
 643                                 $event_type { ref node_id, ref msg } => {
 644                                         assert_eq!(*node_id, $node_id);
 645                                         (*msg).clone()
 646                                 },
 647                                 _ => panic!("Unexpected event"),
 648                         }
 649                 }
 650         }
 651 }
 652
 653 /// Get an error message from the pending events queue.
 654 pub fn get_err_msg(node: &Node, recipient: &PublicKey) -> msgs::ErrorMessage {
 655         let events = node.node.get_and_clear_pending_msg_events();
 656         assert_eq!(events.len(), 1);
 657         match events[0] {
 658                 MessageSendEvent::HandleError {
 659                         action: msgs::ErrorAction::SendErrorMessage { ref msg }, ref node_id
 660                 } => {
 661                         assert_eq!(node_id, recipient);
 662                         (*msg).clone()
 663                 },
 664                 _ => panic!("Unexpected event"),
 665         }
 666 }
 667
 668 /// Get a specific event from the pending events queue.
 669 #[macro_export]
 670 macro_rules! get_event {
 671         ($node: expr, $event_type: path) => {
 672                 {
 673                         let mut events = $node.node.get_and_clear_pending_events();
 674                         assert_eq!(events.len(), 1);
 675                         let ev = events.pop().unwrap();
 676                         match ev {
 677                                 $event_type { .. } => {
 678                                         ev
 679                                 },
 680                                 _ => panic!("Unexpected event"),
 681                         }
 682                 }
 683         }
 684 }
 685
 686 /// Gets an UpdateHTLCs MessageSendEvent
 687 pub fn get_htlc_update_msgs(node: &Node, recipient: &PublicKey) -> msgs::CommitmentUpdate {
 688         let events = node.node.get_and_clear_pending_msg_events();
 689         assert_eq!(events.len(), 1);
 690         match events[0] {
 691                 MessageSendEvent::UpdateHTLCs { ref node_id, ref updates } => {
 692                         assert_eq!(node_id, recipient);
 693                         (*updates).clone()
 694                 },
 695                 _ => panic!("Unexpected event"),
 696         }
 697 }
 698
 699 #[macro_export]
 700 /// Gets an UpdateHTLCs MessageSendEvent
 701 ///
 702 /// Don't use this, use the identically-named function instead.
 703 macro_rules! get_htlc_update_msgs {
 704         ($node: expr, $node_id: expr) => {
 705                 $crate::ln::functional_test_utils::get_htlc_update_msgs(&$node, &$node_id)
 706         }
 707 }
 708
 709 /// Fetches the first `msg_event` to the passed `node_id` in the passed `msg_events` vec.
 710 /// Returns the `msg_event`.
 711 ///
 712 /// Note that even though `BroadcastChannelAnnouncement` and `BroadcastChannelUpdate`
 713 /// `msg_events` are stored under specific peers, this function does not fetch such `msg_events` as
 714 /// such messages are intended to all peers.
 715 pub fn remove_first_msg_event_to_node(msg_node_id: &PublicKey, msg_events: &mut Vec<MessageSendEvent>) -> MessageSendEvent {
 716         let ev_index = msg_events.iter().position(|e| { match e {
 717                 MessageSendEvent::SendAcceptChannel { node_id, .. } => {
 718                         node_id == msg_node_id
 719                 },
 720                 MessageSendEvent::SendOpenChannel { node_id, .. } => {
 721                         node_id == msg_node_id
 722                 },
 723                 MessageSendEvent::SendFundingCreated { node_id, .. } => {
 724                         node_id == msg_node_id
 725                 },
 726                 MessageSendEvent::SendFundingSigned { node_id, .. } => {
 727                         node_id == msg_node_id
 728                 },
 729                 MessageSendEvent::SendChannelReady { node_id, .. } => {
 730                         node_id == msg_node_id
 731                 },
 732                 MessageSendEvent::SendAnnouncementSignatures { node_id, .. } => {
 733                         node_id == msg_node_id
 734                 },
 735                 MessageSendEvent::UpdateHTLCs { node_id, .. } => {
 736                         node_id == msg_node_id
 737                 },
 738                 MessageSendEvent::SendRevokeAndACK { node_id, .. } => {
 739                         node_id == msg_node_id
 740                 },
 741                 MessageSendEvent::SendClosingSigned { node_id, .. } => {
 742                         node_id == msg_node_id
 743                 },
 744                 MessageSendEvent::SendShutdown { node_id, .. } => {
 745                         node_id == msg_node_id
 746                 },
 747                 MessageSendEvent::SendChannelReestablish { node_id, .. } => {
 748                         node_id == msg_node_id
 749                 },
 750                 MessageSendEvent::SendChannelAnnouncement { node_id, .. } => {
 751                         node_id == msg_node_id
 752                 },
 753                 MessageSendEvent::BroadcastChannelAnnouncement { .. } => {
 754                         false
 755                 },
 756                 MessageSendEvent::BroadcastChannelUpdate { .. } => {
 757                         false
 758                 },
 759                 MessageSendEvent::BroadcastNodeAnnouncement { .. } => {
 760                         false
 761                 },
 762                 MessageSendEvent::SendChannelUpdate { node_id, .. } => {
 763                         node_id == msg_node_id
 764                 },
 765                 MessageSendEvent::HandleError { node_id, .. } => {
 766                         node_id == msg_node_id
 767                 },
 768                 MessageSendEvent::SendChannelRangeQuery { node_id, .. } => {
 769                         node_id == msg_node_id
 770                 },
 771                 MessageSendEvent::SendShortIdsQuery { node_id, .. } => {
 772                         node_id == msg_node_id
 773                 },
 774                 MessageSendEvent::SendReplyChannelRange { node_id, .. } => {
 775                         node_id == msg_node_id
 776                 },
 777                 MessageSendEvent::SendGossipTimestampFilter { node_id, .. } => {
 778                         node_id == msg_node_id
 779                 },
 780                 MessageSendEvent::SendAcceptChannelV2 { node_id, .. } => {
 781                         node_id == msg_node_id
 782                 },
 783                 MessageSendEvent::SendOpenChannelV2 { node_id, .. } => {
 784                         node_id == msg_node_id
 785                 },
 786                 MessageSendEvent::SendTxAddInput { node_id, .. } => {
 787                         node_id == msg_node_id
 788                 },
 789                 MessageSendEvent::SendTxAddOutput { node_id, .. } => {
 790                         node_id == msg_node_id
 791                 },
 792                 MessageSendEvent::SendTxRemoveInput { node_id, .. } => {
 793                         node_id == msg_node_id
 794                 },
 795                 MessageSendEvent::SendTxRemoveOutput { node_id, .. } => {
 796                         node_id == msg_node_id
 797                 },
 798                 MessageSendEvent::SendTxComplete { node_id, .. } => {
 799                         node_id == msg_node_id
 800                 },
 801                 MessageSendEvent::SendTxSignatures { node_id, .. } => {
 802                         node_id == msg_node_id
 803                 },
 804                 MessageSendEvent::SendTxInitRbf { node_id, .. } => {
 805                         node_id == msg_node_id
 806                 },
 807                 MessageSendEvent::SendTxAckRbf { node_id, .. } => {
 808                         node_id == msg_node_id
 809                 },
 810                 MessageSendEvent::SendTxAbort { node_id, .. } => {
 811                         node_id == msg_node_id
 812                 },
 813         }});
 814         if ev_index.is_some() {
 815                 msg_events.remove(ev_index.unwrap())
 816         } else {
 817                 panic!("Couldn't find any MessageSendEvent to the node!")
 818         }
 819 }
 820
 821 #[cfg(test)]
 822 macro_rules! get_channel_ref {
 823         ($node: expr, $counterparty_node: expr, $per_peer_state_lock: ident, $peer_state_lock: ident, $channel_id: expr) => {
 824                 {
 825                         $per_peer_state_lock = $node.node.per_peer_state.read().unwrap();
 826                         $peer_state_lock = $per_peer_state_lock.get(&$counterparty_node.node.get_our_node_id()).unwrap().lock().unwrap();
 827                         $peer_state_lock.channel_by_id.get_mut(&$channel_id).unwrap()
 828                 }
 829         }
 830 }
 831
 832 #[cfg(test)]
 833 macro_rules! get_feerate {
 834         ($node: expr, $counterparty_node: expr, $channel_id: expr) => {
 835                 {
 836                         let mut per_peer_state_lock;
 837                         let mut peer_state_lock;
 838                         let phase = get_channel_ref!($node, $counterparty_node, per_peer_state_lock, peer_state_lock, $channel_id);
 839                         phase.context().get_feerate_sat_per_1000_weight()
 840                 }
 841         }
 842 }
 843
 844 #[cfg(test)]
 845 macro_rules! get_channel_type_features {
 846         ($node: expr, $counterparty_node: expr, $channel_id: expr) => {
 847                 {
 848                         let mut per_peer_state_lock;
 849                         let mut peer_state_lock;
 850                         let chan = get_channel_ref!($node, $counterparty_node, per_peer_state_lock, peer_state_lock, $channel_id);
 851                         chan.context().get_channel_type().clone()
 852                 }
 853         }
 854 }
 855
 856 /// Returns a channel monitor given a channel id, making some naive assumptions
 857 #[macro_export]
 858 macro_rules! get_monitor {
 859         ($node: expr, $channel_id: expr) => {
 860                 {
 861                         use bitcoin::hashes::Hash;
 862                         let mut monitor = None;
 863                         // Assume funding vout is either 0 or 1 blindly
 864                         for index in 0..2 {
 865                                 if let Ok(mon) = $node.chain_monitor.chain_monitor.get_monitor(
 866                                         $crate::chain::transaction::OutPoint {
 867                                                 txid: bitcoin::Txid::from_slice(&$channel_id.0[..]).unwrap(), index
 868                                         })
 869                                 {
 870                                         monitor = Some(mon);
 871                                         break;
 872                                 }
 873                         }
 874                         monitor.unwrap()
 875                 }
 876         }
 877 }
 878
 879 /// Returns any local commitment transactions for the channel.
 880 #[macro_export]
 881 macro_rules! get_local_commitment_txn {
 882         ($node: expr, $channel_id: expr) => {
 883                 {
 884                         $crate::get_monitor!($node, $channel_id).unsafe_get_latest_holder_commitment_txn(&$node.logger)
 885                 }
 886         }
 887 }
 888
 889 /// Check the error from attempting a payment.
 890 #[macro_export]
 891 macro_rules! unwrap_send_err {
 892         ($res: expr, $all_failed: expr, $type: pat, $check: expr) => {
 893                 match &$res {
 894                         &Err(PaymentSendFailure::AllFailedResendSafe(ref fails)) if $all_failed => {
 895                                 assert_eq!(fails.len(), 1);
 896                                 match fails[0] {
 897                                         $type => { $check },
 898                                         _ => panic!(),
 899                                 }
 900                         },
 901                         &Err(PaymentSendFailure::PartialFailure { ref results, .. }) if !$all_failed => {
 902                                 assert_eq!(results.len(), 1);
 903                                 match results[0] {
 904                                         Err($type) => { $check },
 905                                         _ => panic!(),
 906                                 }
 907                         },
 908                         _ => panic!(),
 909                 }
 910         }
 911 }
 912
 913 /// Check whether N channel monitor(s) have been added.
 914 pub fn check_added_monitors<CM: AChannelManager, H: NodeHolder<CM=CM>>(node: &H, count: usize) {
 915         if let Some(chain_monitor) = node.chain_monitor() {
 916                 let mut added_monitors = chain_monitor.added_monitors.lock().unwrap();
 917                 assert_eq!(added_monitors.len(), count);
 918                 added_monitors.clear();
 919         }
 920 }
 921
 922 /// Check whether N channel monitor(s) have been added.
 923 ///
 924 /// Don't use this, use the identically-named function instead.
 925 #[macro_export]
 926 macro_rules! check_added_monitors {
 927         ($node: expr, $count: expr) => {
 928                 $crate::ln::functional_test_utils::check_added_monitors(&$node, $count);
 929         }
 930 }
 931
 932 /// Checks whether the claimed HTLC for the specified path has the correct channel information.
 933 ///
 934 /// This will panic if the path is empty, if the HTLC's channel ID is not actually a channel that
 935 /// connects the final two nodes in the path, or if the `user_channel_id` is incorrect.
 936 pub fn check_claimed_htlc_channel<'a, 'b, 'c>(origin_node: &Node<'a, 'b, 'c>, path: &[&Node<'a, 'b, 'c>], htlc: &ClaimedHTLC) {
 937         let mut nodes = path.iter().rev();
 938         let dest = nodes.next().expect("path should have a destination").node;
 939         let prev = nodes.next().unwrap_or(&origin_node).node;
 940         let dest_channels = dest.list_channels();
 941         let ch = dest_channels.iter().find(|ch| ch.channel_id == htlc.channel_id)
 942                 .expect("HTLC's channel should be one of destination node's channels");
 943         assert_eq!(htlc.user_channel_id, ch.user_channel_id);
 944         assert_eq!(ch.counterparty.node_id, prev.get_our_node_id());
 945 }
 946
 947 pub fn _reload_node<'a, 'b, 'c>(node: &'a Node<'a, 'b, 'c>, default_config: UserConfig, chanman_encoded: &[u8], monitors_encoded: &[&[u8]]) -> TestChannelManager<'b, 'c> {
 948         let mut monitors_read = Vec::with_capacity(monitors_encoded.len());
 949         for encoded in monitors_encoded {
 950                 let mut monitor_read = &encoded[..];
 951                 let (_, monitor) = <(BlockHash, ChannelMonitor<TestChannelSigner>)>
 952                         ::read(&mut monitor_read, (node.keys_manager, node.keys_manager)).unwrap();
 953                 assert!(monitor_read.is_empty());
 954                 monitors_read.push(monitor);
 955         }
 956
 957         let mut node_read = &chanman_encoded[..];
 958         let (_, node_deserialized) = {
 959                 let mut channel_monitors = HashMap::new();
 960                 for monitor in monitors_read.iter_mut() {
 961                         assert!(channel_monitors.insert(monitor.get_funding_txo().0, monitor).is_none());
 962                 }
 963                 <(BlockHash, TestChannelManager<'b, 'c>)>::read(&mut node_read, ChannelManagerReadArgs {
 964                         default_config,
 965                         entropy_source: node.keys_manager,
 966                         node_signer: node.keys_manager,
 967                         signer_provider: node.keys_manager,
 968                         fee_estimator: node.fee_estimator,
 969                         router: node.router,
 970                         chain_monitor: node.chain_monitor,
 971                         tx_broadcaster: node.tx_broadcaster,
 972                         logger: node.logger,
 973                         channel_monitors,
 974                 }).unwrap()
 975         };
 976         assert!(node_read.is_empty());
 977
 978         for monitor in monitors_read.drain(..) {
 979                 assert_eq!(node.chain_monitor.watch_channel(monitor.get_funding_txo().0, monitor),
 980                         ChannelMonitorUpdateStatus::Completed);
 981                 check_added_monitors!(node, 1);
 982         }
 983
 984         node_deserialized
 985 }
 986
 987 #[cfg(test)]
 988 macro_rules! reload_node {
 989         ($node: expr, $new_config: expr, $chanman_encoded: expr, $monitors_encoded: expr, $persister: ident, $new_chain_monitor: ident, $new_channelmanager: ident) => {
 990                 let chanman_encoded = $chanman_encoded;
 991
 992                 $persister = test_utils::TestPersister::new();
 993                 $new_chain_monitor = test_utils::TestChainMonitor::new(Some($node.chain_source), $node.tx_broadcaster.clone(), $node.logger, $node.fee_estimator, &$persister, &$node.keys_manager);
 994                 $node.chain_monitor = &$new_chain_monitor;
 995
 996                 $new_channelmanager = _reload_node(&$node, $new_config, &chanman_encoded, $monitors_encoded);
 997                 $node.node = &$new_channelmanager;
 998         };
 999         ($node: expr, $chanman_encoded: expr, $monitors_encoded: expr, $persister: ident, $new_chain_monitor: ident, $new_channelmanager: ident) => {
1000                 reload_node!($node, $crate::util::config::UserConfig::default(), $chanman_encoded, $monitors_encoded, $persister, $new_chain_monitor, $new_channelmanager);
1001         };
1002 }
1003
1004 pub fn create_funding_transaction<'a, 'b, 'c>(node: &Node<'a, 'b, 'c>,
1005         expected_counterparty_node_id: &PublicKey, expected_chan_value: u64, expected_user_chan_id: u128)
1006  -> (ChannelId, Transaction, OutPoint)
1007 {
1008         internal_create_funding_transaction(node, expected_counterparty_node_id, expected_chan_value, expected_user_chan_id, false)
1009 }
1010
1011 pub fn create_coinbase_funding_transaction<'a, 'b, 'c>(node: &Node<'a, 'b, 'c>,
1012         expected_counterparty_node_id: &PublicKey, expected_chan_value: u64, expected_user_chan_id: u128)
1013  -> (ChannelId, Transaction, OutPoint)
1014 {
1015         internal_create_funding_transaction(node, expected_counterparty_node_id, expected_chan_value, expected_user_chan_id, true)
1016 }
1017
1018 fn internal_create_funding_transaction<'a, 'b, 'c>(node: &Node<'a, 'b, 'c>,
1019         expected_counterparty_node_id: &PublicKey, expected_chan_value: u64, expected_user_chan_id: u128,
1020         coinbase: bool) -> (ChannelId, Transaction, OutPoint) {
1021         let chan_id = *node.network_chan_count.borrow();
1022
1023         let events = node.node.get_and_clear_pending_events();
1024         assert_eq!(events.len(), 1);
1025         match events[0] {
1026                 Event::FundingGenerationReady { ref temporary_channel_id, ref counterparty_node_id, ref channel_value_satoshis, ref output_script, user_channel_id } => {
1027                         assert_eq!(counterparty_node_id, expected_counterparty_node_id);
1028                         assert_eq!(*channel_value_satoshis, expected_chan_value);
1029                         assert_eq!(user_channel_id, expected_user_chan_id);
1030
1031                         let input = if coinbase {
1032                                 vec![TxIn {
1033                                         previous_output: bitcoin::OutPoint::null(),
1034                                         ..Default::default()
1035                                 }]
1036                         } else {
1037                                 Vec::new()
1038                         };
1039
1040                         let tx = Transaction { version: chan_id as i32, lock_time: PackedLockTime::ZERO, input, output: vec![TxOut {
1041                                 value: *channel_value_satoshis, script_pubkey: output_script.clone(),
1042                         }]};
1043                         let funding_outpoint = OutPoint { txid: tx.txid(), index: 0 };
1044                         (*temporary_channel_id, tx, funding_outpoint)
1045                 },
1046                 _ => panic!("Unexpected event"),
1047         }
1048 }
1049
1050 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: ChannelId) -> Transaction {
1051         let (temporary_channel_id, tx, funding_output) = create_funding_transaction(node_a, &node_b.node.get_our_node_id(), channel_value, 42);
1052         assert_eq!(temporary_channel_id, expected_temporary_channel_id);
1053
1054         assert!(node_a.node.funding_transaction_generated(&temporary_channel_id, &node_b.node.get_our_node_id(), tx.clone()).is_ok());
1055         check_added_monitors!(node_a, 0);
1056
1057         let funding_created_msg = get_event_msg!(node_a, MessageSendEvent::SendFundingCreated, node_b.node.get_our_node_id());
1058         assert_eq!(funding_created_msg.temporary_channel_id, expected_temporary_channel_id);
1059         node_b.node.handle_funding_created(&node_a.node.get_our_node_id(), &funding_created_msg);
1060         {
1061                 let mut added_monitors = node_b.chain_monitor.added_monitors.lock().unwrap();
1062                 assert_eq!(added_monitors.len(), 1);
1063                 assert_eq!(added_monitors[0].0, funding_output);
1064                 added_monitors.clear();
1065         }
1066         expect_channel_pending_event(&node_b, &node_a.node.get_our_node_id());
1067
1068         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()));
1069         {
1070                 let mut added_monitors = node_a.chain_monitor.added_monitors.lock().unwrap();
1071                 assert_eq!(added_monitors.len(), 1);
1072                 assert_eq!(added_monitors[0].0, funding_output);
1073                 added_monitors.clear();
1074         }
1075         expect_channel_pending_event(&node_a, &node_b.node.get_our_node_id());
1076
1077         let events_4 = node_a.node.get_and_clear_pending_events();
1078         assert_eq!(events_4.len(), 0);
1079
1080         assert_eq!(node_a.tx_broadcaster.txn_broadcasted.lock().unwrap().len(), 1);
1081         assert_eq!(node_a.tx_broadcaster.txn_broadcasted.lock().unwrap()[0], tx);
1082         node_a.tx_broadcaster.txn_broadcasted.lock().unwrap().clear();
1083
1084         // Ensure that funding_transaction_generated is idempotent.
1085         assert!(node_a.node.funding_transaction_generated(&temporary_channel_id, &node_b.node.get_our_node_id(), tx.clone()).is_err());
1086         assert!(node_a.node.get_and_clear_pending_msg_events().is_empty());
1087         check_added_monitors!(node_a, 0);
1088
1089         tx
1090 }
1091
1092 // Receiver must have been initialized with manually_accept_inbound_channels set to true.
1093 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, ChannelId) {
1094         let initiator_channels = initiator.node.list_usable_channels().len();
1095         let receiver_channels = receiver.node.list_usable_channels().len();
1096
1097         initiator.node.create_channel(receiver.node.get_our_node_id(), 100_000, 10_001, 42, initiator_config).unwrap();
1098         let open_channel = get_event_msg!(initiator, MessageSendEvent::SendOpenChannel, receiver.node.get_our_node_id());
1099
1100         receiver.node.handle_open_channel(&initiator.node.get_our_node_id(), &open_channel);
1101         let events = receiver.node.get_and_clear_pending_events();
1102         assert_eq!(events.len(), 1);
1103         match events[0] {
1104                 Event::OpenChannelRequest { temporary_channel_id, .. } => {
1105                         receiver.node.accept_inbound_channel_from_trusted_peer_0conf(&temporary_channel_id, &initiator.node.get_our_node_id(), 0).unwrap();
1106                 },
1107                 _ => panic!("Unexpected event"),
1108         };
1109
1110         let accept_channel = get_event_msg!(receiver, MessageSendEvent::SendAcceptChannel, initiator.node.get_our_node_id());
1111         assert_eq!(accept_channel.minimum_depth, 0);
1112         initiator.node.handle_accept_channel(&receiver.node.get_our_node_id(), &accept_channel);
1113
1114         let (temporary_channel_id, tx, _) = create_funding_transaction(&initiator, &receiver.node.get_our_node_id(), 100_000, 42);
1115         initiator.node.funding_transaction_generated(&temporary_channel_id, &receiver.node.get_our_node_id(), tx.clone()).unwrap();
1116         let funding_created = get_event_msg!(initiator, MessageSendEvent::SendFundingCreated, receiver.node.get_our_node_id());
1117
1118         receiver.node.handle_funding_created(&initiator.node.get_our_node_id(), &funding_created);
1119         check_added_monitors!(receiver, 1);
1120         let bs_signed_locked = receiver.node.get_and_clear_pending_msg_events();
1121         assert_eq!(bs_signed_locked.len(), 2);
1122         let as_channel_ready;
1123         match &bs_signed_locked[0] {
1124                 MessageSendEvent::SendFundingSigned { node_id, msg } => {
1125                         assert_eq!(*node_id, initiator.node.get_our_node_id());
1126                         initiator.node.handle_funding_signed(&receiver.node.get_our_node_id(), &msg);
1127                         expect_channel_pending_event(&initiator, &receiver.node.get_our_node_id());
1128                         expect_channel_pending_event(&receiver, &initiator.node.get_our_node_id());
1129                         check_added_monitors!(initiator, 1);
1130
1131                         assert_eq!(initiator.tx_broadcaster.txn_broadcasted.lock().unwrap().len(), 1);
1132                         assert_eq!(initiator.tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0)[0], tx);
1133
1134                         as_channel_ready = get_event_msg!(initiator, MessageSendEvent::SendChannelReady, receiver.node.get_our_node_id());
1135                 }
1136                 _ => panic!("Unexpected event"),
1137         }
1138         match &bs_signed_locked[1] {
1139                 MessageSendEvent::SendChannelReady { node_id, msg } => {
1140                         assert_eq!(*node_id, initiator.node.get_our_node_id());
1141                         initiator.node.handle_channel_ready(&receiver.node.get_our_node_id(), &msg);
1142                         expect_channel_ready_event(&initiator, &receiver.node.get_our_node_id());
1143                 }
1144                 _ => panic!("Unexpected event"),
1145         }
1146
1147         receiver.node.handle_channel_ready(&initiator.node.get_our_node_id(), &as_channel_ready);
1148         expect_channel_ready_event(&receiver, &initiator.node.get_our_node_id());
1149
1150         let as_channel_update = get_event_msg!(initiator, MessageSendEvent::SendChannelUpdate, receiver.node.get_our_node_id());
1151         let bs_channel_update = get_event_msg!(receiver, MessageSendEvent::SendChannelUpdate, initiator.node.get_our_node_id());
1152
1153         initiator.node.handle_channel_update(&receiver.node.get_our_node_id(), &bs_channel_update);
1154         receiver.node.handle_channel_update(&initiator.node.get_our_node_id(), &as_channel_update);
1155
1156         assert_eq!(initiator.node.list_usable_channels().len(), initiator_channels + 1);
1157         assert_eq!(receiver.node.list_usable_channels().len(), receiver_channels + 1);
1158
1159         (tx, as_channel_ready.channel_id)
1160 }
1161
1162 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 {
1163         let create_chan_id = node_a.node.create_channel(node_b.node.get_our_node_id(), channel_value, push_msat, 42, None).unwrap();
1164         let open_channel_msg = get_event_msg!(node_a, MessageSendEvent::SendOpenChannel, node_b.node.get_our_node_id());
1165         assert_eq!(open_channel_msg.temporary_channel_id, create_chan_id);
1166         assert_eq!(node_a.node.list_channels().iter().find(|channel| channel.channel_id == create_chan_id).unwrap().user_channel_id, 42);
1167         node_b.node.handle_open_channel(&node_a.node.get_our_node_id(), &open_channel_msg);
1168         if node_b.node.get_current_default_configuration().manually_accept_inbound_channels {
1169                 let events = node_b.node.get_and_clear_pending_events();
1170                 assert_eq!(events.len(), 1);
1171                 match &events[0] {
1172                         Event::OpenChannelRequest { temporary_channel_id, counterparty_node_id, .. } =>
1173                                 node_b.node.accept_inbound_channel(temporary_channel_id, counterparty_node_id, 42).unwrap(),
1174                         _ => panic!("Unexpected event"),
1175                 };
1176         }
1177         let accept_channel_msg = get_event_msg!(node_b, MessageSendEvent::SendAcceptChannel, node_a.node.get_our_node_id());
1178         assert_eq!(accept_channel_msg.temporary_channel_id, create_chan_id);
1179         node_a.node.handle_accept_channel(&node_b.node.get_our_node_id(), &accept_channel_msg);
1180         assert_ne!(node_b.node.list_channels().iter().find(|channel| channel.channel_id == create_chan_id).unwrap().user_channel_id, 0);
1181
1182         sign_funding_transaction(node_a, node_b, channel_value, create_chan_id)
1183 }
1184
1185 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) {
1186         confirm_transaction_at(node_conf, tx, conf_height);
1187         connect_blocks(node_conf, CHAN_CONFIRM_DEPTH - 1);
1188         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()));
1189 }
1190
1191 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), ChannelId) {
1192         let channel_id;
1193         let events_6 = node_conf.node.get_and_clear_pending_msg_events();
1194         assert_eq!(events_6.len(), 3);
1195         let announcement_sigs_idx = if let MessageSendEvent::SendChannelUpdate { ref node_id, msg: _ } = events_6[1] {
1196                 assert_eq!(*node_id, node_recv.node.get_our_node_id());
1197                 2
1198         } else if let MessageSendEvent::SendChannelUpdate { ref node_id, msg: _ } = events_6[2] {
1199                 assert_eq!(*node_id, node_recv.node.get_our_node_id());
1200                 1
1201         } else { panic!("Unexpected event: {:?}", events_6[1]); };
1202         ((match events_6[0] {
1203                 MessageSendEvent::SendChannelReady { ref node_id, ref msg } => {
1204                         channel_id = msg.channel_id.clone();
1205                         assert_eq!(*node_id, node_recv.node.get_our_node_id());
1206                         msg.clone()
1207                 },
1208                 _ => panic!("Unexpected event"),
1209         }, match events_6[announcement_sigs_idx] {
1210                 MessageSendEvent::SendAnnouncementSignatures { ref node_id, ref msg } => {
1211                         assert_eq!(*node_id, node_recv.node.get_our_node_id());
1212                         msg.clone()
1213                 },
1214                 _ => panic!("Unexpected event"),
1215         }), channel_id)
1216 }
1217
1218 pub fn create_chan_between_nodes_with_value_confirm<'a, 'b, 'c: 'd, 'd>(node_a: &'a Node<'b, 'c, 'd>, node_b: &'a Node<'b, 'c, 'd>, tx: &Transaction) -> ((msgs::ChannelReady, msgs::AnnouncementSignatures), ChannelId) {
1219         let conf_height = core::cmp::max(node_a.best_block_info().1 + 1, node_b.best_block_info().1 + 1);
1220         create_chan_between_nodes_with_value_confirm_first(node_a, node_b, tx, conf_height);
1221         confirm_transaction_at(node_a, tx, conf_height);
1222         connect_blocks(node_a, CHAN_CONFIRM_DEPTH - 1);
1223         expect_channel_ready_event(&node_a, &node_b.node.get_our_node_id());
1224         create_chan_between_nodes_with_value_confirm_second(node_b, node_a)
1225 }
1226
1227 pub fn create_chan_between_nodes_with_value_a<'a, 'b, 'c: 'd, '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), ChannelId, Transaction) {
1228         let tx = create_chan_between_nodes_with_value_init(node_a, node_b, channel_value, push_msat);
1229         let (msgs, chan_id) = create_chan_between_nodes_with_value_confirm(node_a, node_b, &tx);
1230         (msgs, chan_id, tx)
1231 }
1232
1233 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) {
1234         node_b.node.handle_channel_ready(&node_a.node.get_our_node_id(), &as_funding_msgs.0);
1235         let bs_announcement_sigs = get_event_msg!(node_b, MessageSendEvent::SendAnnouncementSignatures, node_a.node.get_our_node_id());
1236         node_b.node.handle_announcement_signatures(&node_a.node.get_our_node_id(), &as_funding_msgs.1);
1237
1238         let events_7 = node_b.node.get_and_clear_pending_msg_events();
1239         assert_eq!(events_7.len(), 1);
1240         let (announcement, bs_update) = match events_7[0] {
1241                 MessageSendEvent::BroadcastChannelAnnouncement { ref msg, ref update_msg } => {
1242                         (msg, update_msg.clone().unwrap())
1243                 },
1244                 _ => panic!("Unexpected event"),
1245         };
1246
1247         node_a.node.handle_announcement_signatures(&node_b.node.get_our_node_id(), &bs_announcement_sigs);
1248         let events_8 = node_a.node.get_and_clear_pending_msg_events();
1249         assert_eq!(events_8.len(), 1);
1250         let as_update = match events_8[0] {
1251                 MessageSendEvent::BroadcastChannelAnnouncement { ref msg, ref update_msg } => {
1252                         assert!(*announcement == *msg);
1253                         let update_msg = update_msg.clone().unwrap();
1254                         assert_eq!(update_msg.contents.short_channel_id, announcement.contents.short_channel_id);
1255                         assert_eq!(update_msg.contents.short_channel_id, bs_update.contents.short_channel_id);
1256                         update_msg
1257                 },
1258                 _ => panic!("Unexpected event"),
1259         };
1260
1261         *node_a.network_chan_count.borrow_mut() += 1;
1262
1263         expect_channel_ready_event(&node_b, &node_a.node.get_our_node_id());
1264         ((*announcement).clone(), as_update, bs_update)
1265 }
1266
1267 pub fn create_announced_chan_between_nodes<'a, 'b, 'c: 'd, 'd>(nodes: &'a Vec<Node<'b, 'c, 'd>>, a: usize, b: usize) -> (msgs::ChannelUpdate, msgs::ChannelUpdate, ChannelId, Transaction) {
1268         create_announced_chan_between_nodes_with_value(nodes, a, b, 100000, 10001)
1269 }
1270
1271 pub fn create_announced_chan_between_nodes_with_value<'a, 'b, 'c: 'd, 'd>(nodes: &'a Vec<Node<'b, 'c, 'd>>, a: usize, b: usize, channel_value: u64, push_msat: u64) -> (msgs::ChannelUpdate, msgs::ChannelUpdate, ChannelId, Transaction) {
1272         let chan_announcement = create_chan_between_nodes_with_value(&nodes[a], &nodes[b], channel_value, push_msat);
1273         update_nodes_with_chan_announce(nodes, a, b, &chan_announcement.0, &chan_announcement.1, &chan_announcement.2);
1274         (chan_announcement.1, chan_announcement.2, chan_announcement.3, chan_announcement.4)
1275 }
1276
1277 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) {
1278         let mut no_announce_cfg = test_default_channel_config();
1279         no_announce_cfg.channel_handshake_config.announced_channel = false;
1280         nodes[a].node.create_channel(nodes[b].node.get_our_node_id(), channel_value, push_msat, 42, Some(no_announce_cfg)).unwrap();
1281         let open_channel = get_event_msg!(nodes[a], MessageSendEvent::SendOpenChannel, nodes[b].node.get_our_node_id());
1282         nodes[b].node.handle_open_channel(&nodes[a].node.get_our_node_id(), &open_channel);
1283         let accept_channel = get_event_msg!(nodes[b], MessageSendEvent::SendAcceptChannel, nodes[a].node.get_our_node_id());
1284         nodes[a].node.handle_accept_channel(&nodes[b].node.get_our_node_id(), &accept_channel);
1285
1286         let (temporary_channel_id, tx, _) = create_funding_transaction(&nodes[a], &nodes[b].node.get_our_node_id(), channel_value, 42);
1287         nodes[a].node.funding_transaction_generated(&temporary_channel_id, &nodes[b].node.get_our_node_id(), tx.clone()).unwrap();
1288         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()));
1289         check_added_monitors!(nodes[b], 1);
1290
1291         let cs_funding_signed = get_event_msg!(nodes[b], MessageSendEvent::SendFundingSigned, nodes[a].node.get_our_node_id());
1292         expect_channel_pending_event(&nodes[b], &nodes[a].node.get_our_node_id());
1293
1294         nodes[a].node.handle_funding_signed(&nodes[b].node.get_our_node_id(), &cs_funding_signed);
1295         expect_channel_pending_event(&nodes[a], &nodes[b].node.get_our_node_id());
1296         check_added_monitors!(nodes[a], 1);
1297
1298         assert_eq!(nodes[a].tx_broadcaster.txn_broadcasted.lock().unwrap().len(), 1);
1299         assert_eq!(nodes[a].tx_broadcaster.txn_broadcasted.lock().unwrap()[0], tx);
1300         nodes[a].tx_broadcaster.txn_broadcasted.lock().unwrap().clear();
1301
1302         let conf_height = core::cmp::max(nodes[a].best_block_info().1 + 1, nodes[b].best_block_info().1 + 1);
1303         confirm_transaction_at(&nodes[a], &tx, conf_height);
1304         connect_blocks(&nodes[a], CHAN_CONFIRM_DEPTH - 1);
1305         confirm_transaction_at(&nodes[b], &tx, conf_height);
1306         connect_blocks(&nodes[b], CHAN_CONFIRM_DEPTH - 1);
1307         let as_channel_ready = get_event_msg!(nodes[a], MessageSendEvent::SendChannelReady, nodes[b].node.get_our_node_id());
1308         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()));
1309         expect_channel_ready_event(&nodes[a], &nodes[b].node.get_our_node_id());
1310         let as_update = get_event_msg!(nodes[a], MessageSendEvent::SendChannelUpdate, nodes[b].node.get_our_node_id());
1311         nodes[b].node.handle_channel_ready(&nodes[a].node.get_our_node_id(), &as_channel_ready);
1312         expect_channel_ready_event(&nodes[b], &nodes[a].node.get_our_node_id());
1313         let bs_update = get_event_msg!(nodes[b], MessageSendEvent::SendChannelUpdate, nodes[a].node.get_our_node_id());
1314
1315         nodes[a].node.handle_channel_update(&nodes[b].node.get_our_node_id(), &bs_update);
1316         nodes[b].node.handle_channel_update(&nodes[a].node.get_our_node_id(), &as_update);
1317
1318         let mut found_a = false;
1319         for chan in nodes[a].node.list_usable_channels() {
1320                 if chan.channel_id == as_channel_ready.channel_id {
1321                         assert!(!found_a);
1322                         found_a = true;
1323                         assert!(!chan.is_public);
1324                 }
1325         }
1326         assert!(found_a);
1327
1328         let mut found_b = false;
1329         for chan in nodes[b].node.list_usable_channels() {
1330                 if chan.channel_id == as_channel_ready.channel_id {
1331                         assert!(!found_b);
1332                         found_b = true;
1333                         assert!(!chan.is_public);
1334                 }
1335         }
1336         assert!(found_b);
1337
1338         (as_channel_ready, tx)
1339 }
1340
1341 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) {
1342         for node in nodes {
1343                 assert!(node.gossip_sync.handle_channel_announcement(ann).unwrap());
1344                 node.gossip_sync.handle_channel_update(upd_1).unwrap();
1345                 node.gossip_sync.handle_channel_update(upd_2).unwrap();
1346
1347                 // Note that channel_updates are also delivered to ChannelManagers to ensure we have
1348                 // forwarding info for local channels even if its not accepted in the network graph.
1349                 node.node.handle_channel_update(&nodes[a].node.get_our_node_id(), &upd_1);
1350                 node.node.handle_channel_update(&nodes[b].node.get_our_node_id(), &upd_2);
1351         }
1352 }
1353
1354 pub fn do_check_spends<F: Fn(&bitcoin::blockdata::transaction::OutPoint) -> Option<TxOut>>(tx: &Transaction, get_output: F) {
1355         for outp in tx.output.iter() {
1356                 assert!(outp.value >= outp.script_pubkey.dust_value().to_sat(), "Spending tx output didn't meet dust limit");
1357         }
1358         let mut total_value_in = 0;
1359         for input in tx.input.iter() {
1360                 total_value_in += get_output(&input.previous_output).unwrap().value;
1361         }
1362         let mut total_value_out = 0;
1363         for output in tx.output.iter() {
1364                 total_value_out += output.value;
1365         }
1366         let min_fee = (tx.weight() as u64 + 3) / 4; // One sat per vbyte (ie per weight/4, rounded up)
1367         // Input amount - output amount = fee, so check that out + min_fee is smaller than input
1368         assert!(total_value_out + min_fee <= total_value_in);
1369         tx.verify(get_output).unwrap();
1370 }
1371
1372 #[macro_export]
1373 macro_rules! check_spends {
1374         ($tx: expr, $($spends_txn: expr),*) => {
1375                 {
1376                         $(
1377                         for outp in $spends_txn.output.iter() {
1378                                 assert!(outp.value >= outp.script_pubkey.dust_value().to_sat(), "Input tx output didn't meet dust limit");
1379                         }
1380                         )*
1381                         let get_output = |out_point: &bitcoin::blockdata::transaction::OutPoint| {
1382                                 $(
1383                                         if out_point.txid == $spends_txn.txid() {
1384                                                 return $spends_txn.output.get(out_point.vout as usize).cloned()
1385                                         }
1386                                 )*
1387                                 None
1388                         };
1389                         $crate::ln::functional_test_utils::do_check_spends(&$tx, get_output);
1390                 }
1391         }
1392 }
1393
1394 macro_rules! get_closing_signed_broadcast {
1395         ($node: expr, $dest_pubkey: expr) => {
1396                 {
1397                         let events = $node.get_and_clear_pending_msg_events();
1398                         assert!(events.len() == 1 || events.len() == 2);
1399                         (match events[events.len() - 1] {
1400                                 MessageSendEvent::BroadcastChannelUpdate { ref msg } => {
1401                                         assert_eq!(msg.contents.flags & 2, 2);
1402                                         msg.clone()
1403                                 },
1404                                 _ => panic!("Unexpected event"),
1405                         }, if events.len() == 2 {
1406                                 match events[0] {
1407                                         MessageSendEvent::SendClosingSigned { ref node_id, ref msg } => {
1408                                                 assert_eq!(*node_id, $dest_pubkey);
1409                                                 Some(msg.clone())
1410                                         },
1411                                         _ => panic!("Unexpected event"),
1412                                 }
1413                         } else { None })
1414                 }
1415         }
1416 }
1417
1418 #[cfg(test)]
1419 macro_rules! check_warn_msg {
1420         ($node: expr, $recipient_node_id: expr, $chan_id: expr) => {{
1421                 let msg_events = $node.node.get_and_clear_pending_msg_events();
1422                 assert_eq!(msg_events.len(), 1);
1423                 match msg_events[0] {
1424                         MessageSendEvent::HandleError { action: ErrorAction::SendWarningMessage { ref msg, log_level: _ }, node_id } => {
1425                                 assert_eq!(node_id, $recipient_node_id);
1426                                 assert_eq!(msg.channel_id, $chan_id);
1427                                 msg.data.clone()
1428                         },
1429                         _ => panic!("Unexpected event"),
1430                 }
1431         }}
1432 }
1433
1434 /// Check that a channel's closing channel update has been broadcasted, and optionally
1435 /// check whether an error message event has occurred.
1436 pub fn check_closed_broadcast(node: &Node, num_channels: usize, with_error_msg: bool) -> Vec<msgs::ErrorMessage> {
1437         let msg_events = node.node.get_and_clear_pending_msg_events();
1438         assert_eq!(msg_events.len(), if with_error_msg { num_channels * 2 } else { num_channels });
1439         msg_events.into_iter().filter_map(|msg_event| {
1440                 match msg_event {
1441                         MessageSendEvent::BroadcastChannelUpdate { ref msg } => {
1442                                 assert_eq!(msg.contents.flags & 2, 2);
1443                                 None
1444                         },
1445                         MessageSendEvent::HandleError { action: msgs::ErrorAction::SendErrorMessage { ref msg }, node_id: _ } => {
1446                                 assert!(with_error_msg);
1447                                 // TODO: Check node_id
1448                                 Some(msg.clone())
1449                         },
1450                         _ => panic!("Unexpected event"),
1451                 }
1452         }).collect()
1453 }
1454
1455 /// Check that a channel's closing channel update has been broadcasted, and optionally
1456 /// check whether an error message event has occurred.
1457 ///
1458 /// Don't use this, use the identically-named function instead.
1459 #[macro_export]
1460 macro_rules! check_closed_broadcast {
1461         ($node: expr, $with_error_msg: expr) => {
1462                 $crate::ln::functional_test_utils::check_closed_broadcast(&$node, 1, $with_error_msg).pop()
1463         }
1464 }
1465
1466 /// Check that a channel's closing channel events has been issued
1467 pub fn check_closed_event(node: &Node, events_count: usize, expected_reason: ClosureReason, is_check_discard_funding: bool,
1468         expected_counterparty_node_ids: &[PublicKey], expected_channel_capacity: u64) {
1469         let events = node.node.get_and_clear_pending_events();
1470         assert_eq!(events.len(), events_count, "{:?}", events);
1471         let mut issues_discard_funding = false;
1472         for (idx, event) in events.into_iter().enumerate() {
1473                 match event {
1474                         Event::ChannelClosed { ref reason, counterparty_node_id,
1475                                 channel_capacity_sats, .. } => {
1476                                 assert_eq!(*reason, expected_reason);
1477                                 assert_eq!(counterparty_node_id.unwrap(), expected_counterparty_node_ids[idx]);
1478                                 assert_eq!(channel_capacity_sats.unwrap(), expected_channel_capacity);
1479                         },
1480                         Event::DiscardFunding { .. } => {
1481                                 issues_discard_funding = true;
1482                         }
1483                         _ => panic!("Unexpected event"),
1484                 }
1485         }
1486         assert_eq!(is_check_discard_funding, issues_discard_funding);
1487 }
1488
1489 /// Check that a channel's closing channel events has been issued
1490 ///
1491 /// Don't use this, use the identically-named function instead.
1492 #[macro_export]
1493 macro_rules! check_closed_event {
1494         ($node: expr, $events: expr, $reason: expr, $counterparty_node_ids: expr, $channel_capacity: expr) => {
1495                 check_closed_event!($node, $events, $reason, false, $counterparty_node_ids, $channel_capacity);
1496         };
1497         ($node: expr, $events: expr, $reason: expr, $is_check_discard_funding: expr, $counterparty_node_ids: expr, $channel_capacity: expr) => {
1498                 $crate::ln::functional_test_utils::check_closed_event(&$node, $events, $reason,
1499                         $is_check_discard_funding, &$counterparty_node_ids, $channel_capacity);
1500         }
1501 }
1502
1503 pub fn close_channel<'a, 'b, 'c>(outbound_node: &Node<'a, 'b, 'c>, inbound_node: &Node<'a, 'b, 'c>, channel_id: &ChannelId, funding_tx: Transaction, close_inbound_first: bool) -> (msgs::ChannelUpdate, msgs::ChannelUpdate, Transaction) {
1504         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) };
1505         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) };
1506         let (tx_a, tx_b);
1507
1508         node_a.close_channel(channel_id, &node_b.get_our_node_id()).unwrap();
1509         node_b.handle_shutdown(&node_a.get_our_node_id(), &get_event_msg!(struct_a, MessageSendEvent::SendShutdown, node_b.get_our_node_id()));
1510
1511         let events_1 = node_b.get_and_clear_pending_msg_events();
1512         assert!(events_1.len() >= 1);
1513         let shutdown_b = match events_1[0] {
1514                 MessageSendEvent::SendShutdown { ref node_id, ref msg } => {
1515                         assert_eq!(node_id, &node_a.get_our_node_id());
1516                         msg.clone()
1517                 },
1518                 _ => panic!("Unexpected event"),
1519         };
1520
1521         let closing_signed_b = if !close_inbound_first {
1522                 assert_eq!(events_1.len(), 1);
1523                 None
1524         } else {
1525                 Some(match events_1[1] {
1526                         MessageSendEvent::SendClosingSigned { ref node_id, ref msg } => {
1527                                 assert_eq!(node_id, &node_a.get_our_node_id());
1528                                 msg.clone()
1529                         },
1530                         _ => panic!("Unexpected event"),
1531                 })
1532         };
1533
1534         node_a.handle_shutdown(&node_b.get_our_node_id(), &shutdown_b);
1535         let (as_update, bs_update) = if close_inbound_first {
1536                 assert!(node_a.get_and_clear_pending_msg_events().is_empty());
1537                 node_a.handle_closing_signed(&node_b.get_our_node_id(), &closing_signed_b.unwrap());
1538
1539                 node_b.handle_closing_signed(&node_a.get_our_node_id(), &get_event_msg!(struct_a, MessageSendEvent::SendClosingSigned, node_b.get_our_node_id()));
1540                 assert_eq!(broadcaster_b.txn_broadcasted.lock().unwrap().len(), 1);
1541                 tx_b = broadcaster_b.txn_broadcasted.lock().unwrap().remove(0);
1542                 let (bs_update, closing_signed_b) = get_closing_signed_broadcast!(node_b, node_a.get_our_node_id());
1543
1544                 node_a.handle_closing_signed(&node_b.get_our_node_id(), &closing_signed_b.unwrap());
1545                 let (as_update, none_a) = get_closing_signed_broadcast!(node_a, node_b.get_our_node_id());
1546                 assert!(none_a.is_none());
1547                 assert_eq!(broadcaster_a.txn_broadcasted.lock().unwrap().len(), 1);
1548                 tx_a = broadcaster_a.txn_broadcasted.lock().unwrap().remove(0);
1549                 (as_update, bs_update)
1550         } else {
1551                 let closing_signed_a = get_event_msg!(struct_a, MessageSendEvent::SendClosingSigned, node_b.get_our_node_id());
1552
1553                 node_b.handle_closing_signed(&node_a.get_our_node_id(), &closing_signed_a);
1554                 node_a.handle_closing_signed(&node_b.get_our_node_id(), &get_event_msg!(struct_b, MessageSendEvent::SendClosingSigned, node_a.get_our_node_id()));
1555
1556                 assert_eq!(broadcaster_a.txn_broadcasted.lock().unwrap().len(), 1);
1557                 tx_a = broadcaster_a.txn_broadcasted.lock().unwrap().remove(0);
1558                 let (as_update, closing_signed_a) = get_closing_signed_broadcast!(node_a, node_b.get_our_node_id());
1559
1560                 node_b.handle_closing_signed(&node_a.get_our_node_id(), &closing_signed_a.unwrap());
1561                 let (bs_update, none_b) = get_closing_signed_broadcast!(node_b, node_a.get_our_node_id());
1562                 assert!(none_b.is_none());
1563                 assert_eq!(broadcaster_b.txn_broadcasted.lock().unwrap().len(), 1);
1564                 tx_b = broadcaster_b.txn_broadcasted.lock().unwrap().remove(0);
1565                 (as_update, bs_update)
1566         };
1567         assert_eq!(tx_a, tx_b);
1568         check_spends!(tx_a, funding_tx);
1569
1570         (as_update, bs_update, tx_a)
1571 }
1572
1573 pub struct SendEvent {
1574         pub node_id: PublicKey,
1575         pub msgs: Vec<msgs::UpdateAddHTLC>,
1576         pub commitment_msg: msgs::CommitmentSigned,
1577 }
1578 impl SendEvent {
1579         pub fn from_commitment_update(node_id: PublicKey, updates: msgs::CommitmentUpdate) -> SendEvent {
1580                 assert!(updates.update_fulfill_htlcs.is_empty());
1581                 assert!(updates.update_fail_htlcs.is_empty());
1582                 assert!(updates.update_fail_malformed_htlcs.is_empty());
1583                 assert!(updates.update_fee.is_none());
1584                 SendEvent { node_id, msgs: updates.update_add_htlcs, commitment_msg: updates.commitment_signed }
1585         }
1586
1587         pub fn from_event(event: MessageSendEvent) -> SendEvent {
1588                 match event {
1589                         MessageSendEvent::UpdateHTLCs { node_id, updates } => SendEvent::from_commitment_update(node_id, updates),
1590                         _ => panic!("Unexpected event type!"),
1591                 }
1592         }
1593
1594         pub fn from_node<'a, 'b, 'c>(node: &Node<'a, 'b, 'c>) -> SendEvent {
1595                 let mut events = node.node.get_and_clear_pending_msg_events();
1596                 assert_eq!(events.len(), 1);
1597                 SendEvent::from_event(events.pop().unwrap())
1598         }
1599 }
1600
1601 #[macro_export]
1602 /// Don't use this, use the identically-named function instead.
1603 macro_rules! expect_pending_htlcs_forwardable_conditions {
1604         ($node: expr, $expected_failures: expr) => {
1605                 $crate::ln::functional_test_utils::expect_pending_htlcs_forwardable_conditions($node.node.get_and_clear_pending_events(), &$expected_failures);
1606         }
1607 }
1608
1609 #[macro_export]
1610 macro_rules! expect_htlc_handling_failed_destinations {
1611         ($events: expr, $expected_failures: expr) => {{
1612                 for event in $events {
1613                         match event {
1614                                 $crate::events::Event::PendingHTLCsForwardable { .. } => { },
1615                                 $crate::events::Event::HTLCHandlingFailed { ref failed_next_destination, .. } => {
1616                                         assert!($expected_failures.contains(&failed_next_destination))
1617                                 },
1618                                 _ => panic!("Unexpected destination"),
1619                         }
1620                 }
1621         }}
1622 }
1623
1624 /// Checks that an [`Event::PendingHTLCsForwardable`] is available in the given events and, if
1625 /// there are any [`Event::HTLCHandlingFailed`] events their [`HTLCDestination`] is included in the
1626 /// `expected_failures` set.
1627 pub fn expect_pending_htlcs_forwardable_conditions(events: Vec<Event>, expected_failures: &[HTLCDestination]) {
1628         match events[0] {
1629                 Event::PendingHTLCsForwardable { .. } => { },
1630                 _ => panic!("Unexpected event {:?}", events),
1631         };
1632
1633         let count = expected_failures.len() + 1;
1634         assert_eq!(events.len(), count);
1635
1636         if expected_failures.len() > 0 {
1637                 expect_htlc_handling_failed_destinations!(events, expected_failures)
1638         }
1639 }
1640
1641 #[macro_export]
1642 /// Clears (and ignores) a PendingHTLCsForwardable event
1643 ///
1644 /// Don't use this, call [`expect_pending_htlcs_forwardable_conditions()`] with an empty failure
1645 /// set instead.
1646 macro_rules! expect_pending_htlcs_forwardable_ignore {
1647         ($node: expr) => {
1648                 $crate::ln::functional_test_utils::expect_pending_htlcs_forwardable_conditions($node.node.get_and_clear_pending_events(), &[]);
1649         }
1650 }
1651
1652 #[macro_export]
1653 /// Clears (and ignores) PendingHTLCsForwardable and HTLCHandlingFailed events
1654 ///
1655 /// Don't use this, call [`expect_pending_htlcs_forwardable_conditions()`] instead.
1656 macro_rules! expect_pending_htlcs_forwardable_and_htlc_handling_failed_ignore {
1657         ($node: expr, $expected_failures: expr) => {
1658                 $crate::ln::functional_test_utils::expect_pending_htlcs_forwardable_conditions($node.node.get_and_clear_pending_events(), &$expected_failures);
1659         }
1660 }
1661
1662 #[macro_export]
1663 /// Handles a PendingHTLCsForwardable event
1664 macro_rules! expect_pending_htlcs_forwardable {
1665         ($node: expr) => {{
1666                 $crate::ln::functional_test_utils::expect_pending_htlcs_forwardable_conditions($node.node.get_and_clear_pending_events(), &[]);
1667                 $node.node.process_pending_htlc_forwards();
1668
1669                 // Ensure process_pending_htlc_forwards is idempotent.
1670                 $node.node.process_pending_htlc_forwards();
1671         }};
1672 }
1673
1674 #[macro_export]
1675 /// Handles a PendingHTLCsForwardable and HTLCHandlingFailed event
1676 macro_rules! expect_pending_htlcs_forwardable_and_htlc_handling_failed {
1677         ($node: expr, $expected_failures: expr) => {{
1678                 $crate::ln::functional_test_utils::expect_pending_htlcs_forwardable_conditions($node.node.get_and_clear_pending_events(), &$expected_failures);
1679                 $node.node.process_pending_htlc_forwards();
1680
1681                 // Ensure process_pending_htlc_forwards is idempotent.
1682                 $node.node.process_pending_htlc_forwards();
1683         }}
1684 }
1685
1686 #[cfg(test)]
1687 macro_rules! expect_pending_htlcs_forwardable_from_events {
1688         ($node: expr, $events: expr, $ignore: expr) => {{
1689                 assert_eq!($events.len(), 1);
1690                 match $events[0] {
1691                         Event::PendingHTLCsForwardable { .. } => { },
1692                         _ => panic!("Unexpected event"),
1693                 };
1694                 if $ignore {
1695                         $node.node.process_pending_htlc_forwards();
1696
1697                         // Ensure process_pending_htlc_forwards is idempotent.
1698                         $node.node.process_pending_htlc_forwards();
1699                 }
1700         }}
1701 }
1702
1703 #[macro_export]
1704 /// Performs the "commitment signed dance" - the series of message exchanges which occur after a
1705 /// commitment update.
1706 macro_rules! commitment_signed_dance {
1707         ($node_a: expr, $node_b: expr, $commitment_signed: expr, $fail_backwards: expr, true /* skip last step */) => {
1708                 $crate::ln::functional_test_utils::do_commitment_signed_dance(&$node_a, &$node_b, &$commitment_signed, $fail_backwards, true);
1709         };
1710         ($node_a: expr, $node_b: expr, (), $fail_backwards: expr, true /* skip last step */, true /* return extra message */, true /* return last RAA */) => {
1711                 $crate::ln::functional_test_utils::do_main_commitment_signed_dance(&$node_a, &$node_b, $fail_backwards)
1712         };
1713         ($node_a: expr, $node_b: expr, $commitment_signed: expr, $fail_backwards: expr, true /* skip last step */, false /* return extra message */, true /* return last RAA */) => {
1714                 {
1715                         $crate::ln::functional_test_utils::check_added_monitors(&$node_a, 0);
1716                         assert!($node_a.node.get_and_clear_pending_msg_events().is_empty());
1717                         $node_a.node.handle_commitment_signed(&$node_b.node.get_our_node_id(), &$commitment_signed);
1718                         check_added_monitors(&$node_a, 1);
1719                         let (extra_msg_option, bs_revoke_and_ack) = $crate::ln::functional_test_utils::do_main_commitment_signed_dance(&$node_a, &$node_b, $fail_backwards);
1720                         assert!(extra_msg_option.is_none());
1721                         bs_revoke_and_ack
1722                 }
1723         };
1724         ($node_a: expr, $node_b: expr, (), $fail_backwards: expr, true /* skip last step */, false /* no extra message */, $incl_claim: expr) => {
1725                 assert!($crate::ln::functional_test_utils::commitment_signed_dance_through_cp_raa(&$node_a, &$node_b, $fail_backwards, $incl_claim).is_none());
1726         };
1727         ($node_a: expr, $node_b: expr, $commitment_signed: expr, $fail_backwards: expr) => {
1728                 $crate::ln::functional_test_utils::do_commitment_signed_dance(&$node_a, &$node_b, &$commitment_signed, $fail_backwards, false);
1729         }
1730 }
1731
1732 /// Runs the commitment_signed dance after the initial commitment_signed is delivered through to
1733 /// the initiator's `revoke_and_ack` response. i.e. [`do_main_commitment_signed_dance`] plus the
1734 /// `revoke_and_ack` response to it.
1735 ///
1736 /// An HTLC claim on one channel blocks the RAA channel monitor update for the outbound edge
1737 /// channel until the inbound edge channel preimage monitor update completes. Thus, when checking
1738 /// for channel monitor updates, we need to know if an `update_fulfill_htlc` was included in the
1739 /// the commitment we're exchanging. `includes_claim` provides that information.
1740 ///
1741 /// Returns any additional message `node_b` generated in addition to the `revoke_and_ack` response.
1742 pub fn commitment_signed_dance_through_cp_raa(node_a: &Node<'_, '_, '_>, node_b: &Node<'_, '_, '_>, fail_backwards: bool, includes_claim: bool) -> Option<MessageSendEvent> {
1743         let (extra_msg_option, bs_revoke_and_ack) = do_main_commitment_signed_dance(node_a, node_b, fail_backwards);
1744         node_a.node.handle_revoke_and_ack(&node_b.node.get_our_node_id(), &bs_revoke_and_ack);
1745         check_added_monitors(node_a, if includes_claim { 0 } else { 1 });
1746         extra_msg_option
1747 }
1748
1749 /// Does the main logic in the commitment_signed dance. After the first `commitment_signed` has
1750 /// been delivered, this method picks up and delivers the response `revoke_and_ack` and
1751 /// `commitment_signed`, returning the recipient's `revoke_and_ack` and any extra message it may
1752 /// have included.
1753 pub fn do_main_commitment_signed_dance(node_a: &Node<'_, '_, '_>, node_b: &Node<'_, '_, '_>, fail_backwards: bool) -> (Option<MessageSendEvent>, msgs::RevokeAndACK) {
1754         let (as_revoke_and_ack, as_commitment_signed) = get_revoke_commit_msgs!(node_a, node_b.node.get_our_node_id());
1755         check_added_monitors!(node_b, 0);
1756         assert!(node_b.node.get_and_clear_pending_msg_events().is_empty());
1757         node_b.node.handle_revoke_and_ack(&node_a.node.get_our_node_id(), &as_revoke_and_ack);
1758         assert!(node_b.node.get_and_clear_pending_msg_events().is_empty());
1759         check_added_monitors!(node_b, 1);
1760         node_b.node.handle_commitment_signed(&node_a.node.get_our_node_id(), &as_commitment_signed);
1761         let (bs_revoke_and_ack, extra_msg_option) = {
1762                 let mut events = node_b.node.get_and_clear_pending_msg_events();
1763                 assert!(events.len() <= 2);
1764                 let node_a_event = remove_first_msg_event_to_node(&node_a.node.get_our_node_id(), &mut events);
1765                 (match node_a_event {
1766                         MessageSendEvent::SendRevokeAndACK { ref node_id, ref msg } => {
1767                                 assert_eq!(*node_id, node_a.node.get_our_node_id());
1768                                 (*msg).clone()
1769                         },
1770                         _ => panic!("Unexpected event"),
1771                 }, events.get(0).map(|e| e.clone()))
1772         };
1773         check_added_monitors!(node_b, 1);
1774         if fail_backwards {
1775                 assert!(node_a.node.get_and_clear_pending_events().is_empty());
1776                 assert!(node_a.node.get_and_clear_pending_msg_events().is_empty());
1777         }
1778         (extra_msg_option, bs_revoke_and_ack)
1779 }
1780
1781 /// Runs a full commitment_signed dance, delivering a commitment_signed, the responding
1782 /// `revoke_and_ack` and `commitment_signed`, and then the final `revoke_and_ack` response.
1783 ///
1784 /// If `skip_last_step` is unset, also checks for the payment failure update for the previous hop
1785 /// on failure or that no new messages are left over on success.
1786 pub fn do_commitment_signed_dance(node_a: &Node<'_, '_, '_>, node_b: &Node<'_, '_, '_>, commitment_signed: &msgs::CommitmentSigned, fail_backwards: bool, skip_last_step: bool) {
1787         check_added_monitors!(node_a, 0);
1788         assert!(node_a.node.get_and_clear_pending_msg_events().is_empty());
1789         node_a.node.handle_commitment_signed(&node_b.node.get_our_node_id(), commitment_signed);
1790         check_added_monitors!(node_a, 1);
1791
1792         // If this commitment signed dance was due to a claim, don't check for an RAA monitor update.
1793         let got_claim = node_a.node.test_raa_monitor_updates_held(node_b.node.get_our_node_id(), commitment_signed.channel_id);
1794         if fail_backwards { assert!(!got_claim); }
1795         commitment_signed_dance!(node_a, node_b, (), fail_backwards, true, false, got_claim);
1796
1797         if skip_last_step { return; }
1798
1799         if fail_backwards {
1800                 expect_pending_htlcs_forwardable_and_htlc_handling_failed!(node_a,
1801                         vec![crate::events::HTLCDestination::NextHopChannel{ node_id: Some(node_b.node.get_our_node_id()), channel_id: commitment_signed.channel_id }]);
1802                 check_added_monitors!(node_a, 1);
1803
1804                 let node_a_per_peer_state = node_a.node.per_peer_state.read().unwrap();
1805                 let mut number_of_msg_events = 0;
1806                 for (cp_id, peer_state_mutex) in node_a_per_peer_state.iter() {
1807                         let peer_state = peer_state_mutex.lock().unwrap();
1808                         let cp_pending_msg_events = &peer_state.pending_msg_events;
1809                         number_of_msg_events += cp_pending_msg_events.len();
1810                         if cp_pending_msg_events.len() == 1 {
1811                                 if let MessageSendEvent::UpdateHTLCs { .. } = cp_pending_msg_events[0] {
1812                                         assert_ne!(*cp_id, node_b.node.get_our_node_id());
1813                                 } else { panic!("Unexpected event"); }
1814                         }
1815                 }
1816                 // Expecting the failure backwards event to the previous hop (not `node_b`)
1817                 assert_eq!(number_of_msg_events, 1);
1818         } else {
1819                 assert!(node_a.node.get_and_clear_pending_msg_events().is_empty());
1820         }
1821 }
1822
1823 /// Get a payment preimage and hash.
1824 pub fn get_payment_preimage_hash(recipient: &Node, min_value_msat: Option<u64>, min_final_cltv_expiry_delta: Option<u16>) -> (PaymentPreimage, PaymentHash, PaymentSecret) {
1825         let mut payment_count = recipient.network_payment_count.borrow_mut();
1826         let payment_preimage = PaymentPreimage([*payment_count; 32]);
1827         *payment_count += 1;
1828         let payment_hash = PaymentHash(Sha256::hash(&payment_preimage.0[..]).into_inner());
1829         let payment_secret = recipient.node.create_inbound_payment_for_hash(payment_hash, min_value_msat, 7200, min_final_cltv_expiry_delta).unwrap();
1830         (payment_preimage, payment_hash, payment_secret)
1831 }
1832
1833 /// Get a payment preimage and hash.
1834 ///
1835 /// Don't use this, use the identically-named function instead.
1836 #[macro_export]
1837 macro_rules! get_payment_preimage_hash {
1838         ($dest_node: expr) => {
1839                 get_payment_preimage_hash!($dest_node, None)
1840         };
1841         ($dest_node: expr, $min_value_msat: expr) => {
1842                 crate::get_payment_preimage_hash!($dest_node, $min_value_msat, None)
1843         };
1844         ($dest_node: expr, $min_value_msat: expr, $min_final_cltv_expiry_delta: expr) => {
1845                 $crate::ln::functional_test_utils::get_payment_preimage_hash(&$dest_node, $min_value_msat, $min_final_cltv_expiry_delta)
1846         };
1847 }
1848
1849 /// Gets a route from the given sender to the node described in `payment_params`.
1850 pub fn get_route(send_node: &Node, route_params: &RouteParameters) -> Result<Route, msgs::LightningError> {
1851         let scorer = TestScorer::new();
1852         let keys_manager = TestKeysInterface::new(&[0u8; 32], bitcoin::network::constants::Network::Testnet);
1853         let random_seed_bytes = keys_manager.get_secure_random_bytes();
1854         router::get_route(
1855                 &send_node.node.get_our_node_id(), route_params, &send_node.network_graph.read_only(),
1856                 Some(&send_node.node.list_usable_channels().iter().collect::<Vec<_>>()),
1857                 send_node.logger, &scorer, &(), &random_seed_bytes
1858         )
1859 }
1860
1861 /// Gets a route from the given sender to the node described in `payment_params`.
1862 ///
1863 /// Don't use this, use the identically-named function instead.
1864 #[macro_export]
1865 macro_rules! get_route {
1866         ($send_node: expr, $payment_params: expr, $recv_value: expr) => {{
1867                 let route_params = $crate::routing::router::RouteParameters::from_payment_params_and_value($payment_params, $recv_value);
1868                 $crate::ln::functional_test_utils::get_route(&$send_node, &route_params)
1869         }}
1870 }
1871
1872 #[cfg(test)]
1873 #[macro_export]
1874 macro_rules! get_route_and_payment_hash {
1875         ($send_node: expr, $recv_node: expr, $recv_value: expr) => {{
1876                 let payment_params = $crate::routing::router::PaymentParameters::from_node_id($recv_node.node.get_our_node_id(), TEST_FINAL_CLTV)
1877                         .with_bolt11_features($recv_node.node.invoice_features()).unwrap();
1878                 $crate::get_route_and_payment_hash!($send_node, $recv_node, payment_params, $recv_value)
1879         }};
1880         ($send_node: expr, $recv_node: expr, $payment_params: expr, $recv_value: expr) => {{
1881                 let route_params = $crate::routing::router::RouteParameters::from_payment_params_and_value($payment_params, $recv_value);
1882                 let (payment_preimage, payment_hash, payment_secret) =
1883                         $crate::ln::functional_test_utils::get_payment_preimage_hash(&$recv_node, Some($recv_value), None);
1884                 let route = $crate::ln::functional_test_utils::get_route(&$send_node, &route_params);
1885                 (route.unwrap(), payment_hash, payment_preimage, payment_secret)
1886         }}
1887 }
1888
1889 pub fn check_payment_claimable(
1890         event: &Event, expected_payment_hash: PaymentHash, expected_payment_secret: PaymentSecret,
1891         expected_recv_value: u64, expected_payment_preimage: Option<PaymentPreimage>,
1892         expected_receiver_node_id: PublicKey,
1893 ) {
1894         match event {
1895                 Event::PaymentClaimable { ref payment_hash, ref purpose, amount_msat, receiver_node_id, .. } => {
1896                         assert_eq!(expected_payment_hash, *payment_hash);
1897                         assert_eq!(expected_recv_value, *amount_msat);
1898                         assert_eq!(expected_receiver_node_id, receiver_node_id.unwrap());
1899                         match purpose {
1900                                 PaymentPurpose::InvoicePayment { payment_preimage, payment_secret, .. } => {
1901                                         assert_eq!(&expected_payment_preimage, payment_preimage);
1902                                         assert_eq!(expected_payment_secret, *payment_secret);
1903                                 },
1904                                 _ => {},
1905                         }
1906                 },
1907                 _ => panic!("Unexpected event"),
1908         }
1909 }
1910
1911 #[macro_export]
1912 #[cfg(any(test, ldk_bench, feature = "_test_utils"))]
1913 macro_rules! expect_payment_claimable {
1914         ($node: expr, $expected_payment_hash: expr, $expected_payment_secret: expr, $expected_recv_value: expr) => {
1915                 expect_payment_claimable!($node, $expected_payment_hash, $expected_payment_secret, $expected_recv_value, None, $node.node.get_our_node_id())
1916         };
1917         ($node: expr, $expected_payment_hash: expr, $expected_payment_secret: expr, $expected_recv_value: expr, $expected_payment_preimage: expr, $expected_receiver_node_id: expr) => {
1918                 let events = $node.node.get_and_clear_pending_events();
1919                 assert_eq!(events.len(), 1);
1920                 $crate::ln::functional_test_utils::check_payment_claimable(&events[0], $expected_payment_hash, $expected_payment_secret, $expected_recv_value, $expected_payment_preimage, $expected_receiver_node_id)
1921         };
1922 }
1923
1924 #[macro_export]
1925 #[cfg(any(test, ldk_bench, feature = "_test_utils"))]
1926 macro_rules! expect_payment_claimed {
1927         ($node: expr, $expected_payment_hash: expr, $expected_recv_value: expr) => {
1928                 let events = $node.node.get_and_clear_pending_events();
1929                 assert_eq!(events.len(), 1);
1930                 match events[0] {
1931                         $crate::events::Event::PaymentClaimed { ref payment_hash, amount_msat, .. } => {
1932                                 assert_eq!($expected_payment_hash, *payment_hash);
1933                                 assert_eq!($expected_recv_value, amount_msat);
1934                         },
1935                         _ => panic!("Unexpected event"),
1936                 }
1937         }
1938 }
1939
1940 pub fn expect_payment_sent<CM: AChannelManager, H: NodeHolder<CM=CM>>(node: &H,
1941         expected_payment_preimage: PaymentPreimage, expected_fee_msat_opt: Option<Option<u64>>,
1942         expect_per_path_claims: bool, expect_post_ev_mon_update: bool,
1943 ) {
1944         let events = node.node().get_and_clear_pending_events();
1945         let expected_payment_hash = PaymentHash(
1946                 bitcoin::hashes::sha256::Hash::hash(&expected_payment_preimage.0).into_inner());
1947         if expect_per_path_claims {
1948                 assert!(events.len() > 1);
1949         } else {
1950                 assert_eq!(events.len(), 1);
1951         }
1952         if expect_post_ev_mon_update {
1953                 check_added_monitors(node, 1);
1954         }
1955         let expected_payment_id = match events[0] {
1956                 Event::PaymentSent { ref payment_id, ref payment_preimage, ref payment_hash, ref fee_paid_msat } => {
1957                         assert_eq!(expected_payment_preimage, *payment_preimage);
1958                         assert_eq!(expected_payment_hash, *payment_hash);
1959                         if let Some(expected_fee_msat) = expected_fee_msat_opt {
1960                                 assert_eq!(*fee_paid_msat, expected_fee_msat);
1961                         } else {
1962                                 assert!(fee_paid_msat.is_some());
1963                         }
1964                         payment_id.unwrap()
1965                 },
1966                 _ => panic!("Unexpected event"),
1967         };
1968         if expect_per_path_claims {
1969                 for i in 1..events.len() {
1970                         match events[i] {
1971                                 Event::PaymentPathSuccessful { payment_id, payment_hash, .. } => {
1972                                         assert_eq!(payment_id, expected_payment_id);
1973                                         assert_eq!(payment_hash, Some(expected_payment_hash));
1974                                 },
1975                                 _ => panic!("Unexpected event"),
1976                         }
1977                 }
1978         }
1979 }
1980
1981 #[macro_export]
1982 macro_rules! expect_payment_sent {
1983         ($node: expr, $expected_payment_preimage: expr) => {
1984                 $crate::expect_payment_sent!($node, $expected_payment_preimage, None::<u64>, true);
1985         };
1986         ($node: expr, $expected_payment_preimage: expr, $expected_fee_msat_opt: expr) => {
1987                 $crate::expect_payment_sent!($node, $expected_payment_preimage, $expected_fee_msat_opt, true);
1988         };
1989         ($node: expr, $expected_payment_preimage: expr, $expected_fee_msat_opt: expr, $expect_paths: expr) => {
1990                 $crate::ln::functional_test_utils::expect_payment_sent(&$node, $expected_payment_preimage,
1991                         $expected_fee_msat_opt.map(|o| Some(o)), $expect_paths, true);
1992         }
1993 }
1994
1995 #[cfg(test)]
1996 #[macro_export]
1997 macro_rules! expect_payment_path_successful {
1998         ($node: expr) => {
1999                 let events = $node.node.get_and_clear_pending_events();
2000                 assert_eq!(events.len(), 1);
2001                 match events[0] {
2002                         $crate::events::Event::PaymentPathSuccessful { .. } => {},
2003                         _ => panic!("Unexpected event"),
2004                 }
2005         }
2006 }
2007
2008 pub fn expect_payment_forwarded<CM: AChannelManager, H: NodeHolder<CM=CM>>(
2009         event: Event, node: &H, prev_node: &H, next_node: &H, expected_fee: Option<u64>,
2010         upstream_force_closed: bool, downstream_force_closed: bool
2011 ) {
2012         match event {
2013                 Event::PaymentForwarded {
2014                         fee_earned_msat, prev_channel_id, claim_from_onchain_tx, next_channel_id,
2015                         outbound_amount_forwarded_msat: _
2016                 } => {
2017                         assert_eq!(fee_earned_msat, expected_fee);
2018                         if !upstream_force_closed {
2019                                 // Is the event prev_channel_id in one of the channels between the two nodes?
2020                                 assert!(node.node().list_channels().iter().any(|x| x.counterparty.node_id == prev_node.node().get_our_node_id() && x.channel_id == prev_channel_id.unwrap()));
2021                         }
2022                         // We check for force closures since a force closed channel is removed from the
2023                         // node's channel list
2024                         if !downstream_force_closed {
2025                                 assert!(node.node().list_channels().iter().any(|x| x.counterparty.node_id == next_node.node().get_our_node_id() && x.channel_id == next_channel_id.unwrap()));
2026                         }
2027                         assert_eq!(claim_from_onchain_tx, downstream_force_closed);
2028                 },
2029                 _ => panic!("Unexpected event"),
2030         }
2031 }
2032
2033 macro_rules! expect_payment_forwarded {
2034         ($node: expr, $prev_node: expr, $next_node: expr, $expected_fee: expr, $upstream_force_closed: expr, $downstream_force_closed: expr) => {
2035                 let mut events = $node.node.get_and_clear_pending_events();
2036                 assert_eq!(events.len(), 1);
2037                 $crate::ln::functional_test_utils::expect_payment_forwarded(
2038                         events.pop().unwrap(), &$node, &$prev_node, &$next_node, $expected_fee,
2039                         $upstream_force_closed, $downstream_force_closed);
2040         }
2041 }
2042
2043 #[cfg(test)]
2044 #[macro_export]
2045 macro_rules! expect_channel_shutdown_state {
2046         ($node: expr, $chan_id: expr, $state: path) => {
2047                 let chan_details = $node.node.list_channels().into_iter().filter(|cd| cd.channel_id == $chan_id).collect::<Vec<ChannelDetails>>();
2048                 assert_eq!(chan_details.len(), 1);
2049                 assert_eq!(chan_details[0].channel_shutdown_state, Some($state));
2050         }
2051 }
2052
2053 #[cfg(any(test, ldk_bench, feature = "_test_utils"))]
2054 pub fn expect_channel_pending_event<'a, 'b, 'c, 'd>(node: &'a Node<'b, 'c, 'd>, expected_counterparty_node_id: &PublicKey) {
2055         let events = node.node.get_and_clear_pending_events();
2056         assert_eq!(events.len(), 1);
2057         match events[0] {
2058                 crate::events::Event::ChannelPending { ref counterparty_node_id, .. } => {
2059                         assert_eq!(*expected_counterparty_node_id, *counterparty_node_id);
2060                 },
2061                 _ => panic!("Unexpected event"),
2062         }
2063 }
2064
2065 #[cfg(any(test, ldk_bench, feature = "_test_utils"))]
2066 pub fn expect_channel_ready_event<'a, 'b, 'c, 'd>(node: &'a Node<'b, 'c, 'd>, expected_counterparty_node_id: &PublicKey) {
2067         let events = node.node.get_and_clear_pending_events();
2068         assert_eq!(events.len(), 1);
2069         match events[0] {
2070                 crate::events::Event::ChannelReady{ ref counterparty_node_id, .. } => {
2071                         assert_eq!(*expected_counterparty_node_id, *counterparty_node_id);
2072                 },
2073                 _ => panic!("Unexpected event"),
2074         }
2075 }
2076
2077 pub struct PaymentFailedConditions<'a> {
2078         pub(crate) expected_htlc_error_data: Option<(u16, &'a [u8])>,
2079         pub(crate) expected_blamed_scid: Option<u64>,
2080         pub(crate) expected_blamed_chan_closed: Option<bool>,
2081         pub(crate) expected_mpp_parts_remain: bool,
2082 }
2083
2084 impl<'a> PaymentFailedConditions<'a> {
2085         pub fn new() -> Self {
2086                 Self {
2087                         expected_htlc_error_data: None,
2088                         expected_blamed_scid: None,
2089                         expected_blamed_chan_closed: None,
2090                         expected_mpp_parts_remain: false,
2091                 }
2092         }
2093         pub fn mpp_parts_remain(mut self) -> Self {
2094                 self.expected_mpp_parts_remain = true;
2095                 self
2096         }
2097         pub fn blamed_scid(mut self, scid: u64) -> Self {
2098                 self.expected_blamed_scid = Some(scid);
2099                 self
2100         }
2101         pub fn blamed_chan_closed(mut self, closed: bool) -> Self {
2102                 self.expected_blamed_chan_closed = Some(closed);
2103                 self
2104         }
2105         pub fn expected_htlc_error_data(mut self, code: u16, data: &'a [u8]) -> Self {
2106                 self.expected_htlc_error_data = Some((code, data));
2107                 self
2108         }
2109 }
2110
2111 #[cfg(test)]
2112 macro_rules! expect_payment_failed_with_update {
2113         ($node: expr, $expected_payment_hash: expr, $payment_failed_permanently: expr, $scid: expr, $chan_closed: expr) => {
2114                 $crate::ln::functional_test_utils::expect_payment_failed_conditions(
2115                         &$node, $expected_payment_hash, $payment_failed_permanently,
2116                         $crate::ln::functional_test_utils::PaymentFailedConditions::new()
2117                                 .blamed_scid($scid).blamed_chan_closed($chan_closed));
2118         }
2119 }
2120
2121 #[cfg(test)]
2122 macro_rules! expect_payment_failed {
2123         ($node: expr, $expected_payment_hash: expr, $payment_failed_permanently: expr $(, $expected_error_code: expr, $expected_error_data: expr)*) => {
2124                 #[allow(unused_mut)]
2125                 let mut conditions = $crate::ln::functional_test_utils::PaymentFailedConditions::new();
2126                 $(
2127                         conditions = conditions.expected_htlc_error_data($expected_error_code, &$expected_error_data);
2128                 )*
2129                 $crate::ln::functional_test_utils::expect_payment_failed_conditions(&$node, $expected_payment_hash, $payment_failed_permanently, conditions);
2130         };
2131 }
2132
2133 pub fn expect_payment_failed_conditions_event<'a, 'b, 'c, 'd, 'e>(
2134         payment_failed_events: Vec<Event>, expected_payment_hash: PaymentHash,
2135         expected_payment_failed_permanently: bool, conditions: PaymentFailedConditions<'e>
2136 ) {
2137         if conditions.expected_mpp_parts_remain { assert_eq!(payment_failed_events.len(), 1); } else { assert_eq!(payment_failed_events.len(), 2); }
2138         let expected_payment_id = match &payment_failed_events[0] {
2139                 Event::PaymentPathFailed { payment_hash, payment_failed_permanently, payment_id, failure,
2140                         #[cfg(test)]
2141                         error_code,
2142                         #[cfg(test)]
2143                         error_data, .. } => {
2144                         assert_eq!(*payment_hash, expected_payment_hash, "unexpected payment_hash");
2145                         assert_eq!(*payment_failed_permanently, expected_payment_failed_permanently, "unexpected payment_failed_permanently value");
2146                         #[cfg(test)]
2147                         {
2148                                 assert!(error_code.is_some(), "expected error_code.is_some() = true");
2149                                 assert!(error_data.is_some(), "expected error_data.is_some() = true");
2150                                 if let Some((code, data)) = conditions.expected_htlc_error_data {
2151                                         assert_eq!(error_code.unwrap(), code, "unexpected error code");
2152                                         assert_eq!(&error_data.as_ref().unwrap()[..], data, "unexpected error data");
2153                                 }
2154                         }
2155
2156                         if let Some(chan_closed) = conditions.expected_blamed_chan_closed {
2157                                 if let PathFailure::OnPath { network_update: Some(upd) } = failure {
2158                                         match upd {
2159                                                 NetworkUpdate::ChannelUpdateMessage { ref msg } if !chan_closed => {
2160                                                         if let Some(scid) = conditions.expected_blamed_scid {
2161                                                                 assert_eq!(msg.contents.short_channel_id, scid);
2162                                                         }
2163                                                         const CHAN_DISABLED_FLAG: u8 = 2;
2164                                                         assert_eq!(msg.contents.flags & CHAN_DISABLED_FLAG, 0);
2165                                                 },
2166                                                 NetworkUpdate::ChannelFailure { short_channel_id, is_permanent } if chan_closed => {
2167                                                         if let Some(scid) = conditions.expected_blamed_scid {
2168                                                                 assert_eq!(*short_channel_id, scid);
2169                                                         }
2170                                                         assert!(is_permanent);
2171                                                 },
2172                                                 _ => panic!("Unexpected update type"),
2173                                         }
2174                                 } else { panic!("Expected network update"); }
2175                         }
2176
2177                         payment_id.unwrap()
2178                 },
2179                 _ => panic!("Unexpected event"),
2180         };
2181         if !conditions.expected_mpp_parts_remain {
2182                 match &payment_failed_events[1] {
2183                         Event::PaymentFailed { ref payment_hash, ref payment_id, ref reason } => {
2184                                 assert_eq!(*payment_hash, expected_payment_hash, "unexpected second payment_hash");
2185                                 assert_eq!(*payment_id, expected_payment_id);
2186                                 assert_eq!(reason.unwrap(), if expected_payment_failed_permanently {
2187                                         PaymentFailureReason::RecipientRejected
2188                                 } else {
2189                                         PaymentFailureReason::RetriesExhausted
2190                                 });
2191                         }
2192                         _ => panic!("Unexpected second event"),
2193                 }
2194         }
2195 }
2196
2197 pub fn expect_payment_failed_conditions<'a, 'b, 'c, 'd, 'e>(
2198         node: &'a Node<'b, 'c, 'd>, expected_payment_hash: PaymentHash, expected_payment_failed_permanently: bool,
2199         conditions: PaymentFailedConditions<'e>
2200 ) {
2201         let events = node.node.get_and_clear_pending_events();
2202         expect_payment_failed_conditions_event(events, expected_payment_hash, expected_payment_failed_permanently, conditions);
2203 }
2204
2205 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 {
2206         let payment_id = PaymentId(origin_node.keys_manager.backing.get_secure_random_bytes());
2207         origin_node.node.send_payment_with_route(&route, our_payment_hash,
2208                 RecipientOnionFields::secret_only(our_payment_secret), payment_id).unwrap();
2209         check_added_monitors!(origin_node, expected_paths.len());
2210         pass_along_route(origin_node, expected_paths, recv_value, our_payment_hash, our_payment_secret);
2211         payment_id
2212 }
2213
2214 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>) -> Option<Event> {
2215         let mut payment_event = SendEvent::from_event(ev);
2216         let mut prev_node = origin_node;
2217         let mut event = None;
2218
2219         for (idx, &node) in expected_path.iter().enumerate() {
2220                 assert_eq!(node.node.get_our_node_id(), payment_event.node_id);
2221
2222                 node.node.handle_update_add_htlc(&prev_node.node.get_our_node_id(), &payment_event.msgs[0]);
2223                 check_added_monitors!(node, 0);
2224                 commitment_signed_dance!(node, prev_node, payment_event.commitment_msg, false);
2225
2226                 expect_pending_htlcs_forwardable!(node);
2227
2228                 if idx == expected_path.len() - 1 && clear_recipient_events {
2229                         let events_2 = node.node.get_and_clear_pending_events();
2230                         if payment_claimable_expected {
2231                                 assert_eq!(events_2.len(), 1);
2232                                 match &events_2[0] {
2233                                         Event::PaymentClaimable { ref payment_hash, ref purpose, amount_msat,
2234                                                 receiver_node_id, ref via_channel_id, ref via_user_channel_id,
2235                                                 claim_deadline, onion_fields, ..
2236                                         } => {
2237                                                 assert_eq!(our_payment_hash, *payment_hash);
2238                                                 assert_eq!(node.node.get_our_node_id(), receiver_node_id.unwrap());
2239                                                 assert!(onion_fields.is_some());
2240                                                 match &purpose {
2241                                                         PaymentPurpose::InvoicePayment { payment_preimage, payment_secret, .. } => {
2242                                                                 assert_eq!(expected_preimage, *payment_preimage);
2243                                                                 assert_eq!(our_payment_secret.unwrap(), *payment_secret);
2244                                                                 assert_eq!(Some(*payment_secret), onion_fields.as_ref().unwrap().payment_secret);
2245                                                         },
2246                                                         PaymentPurpose::SpontaneousPayment(payment_preimage) => {
2247                                                                 assert_eq!(expected_preimage.unwrap(), *payment_preimage);
2248                                                                 assert_eq!(our_payment_secret, onion_fields.as_ref().unwrap().payment_secret);
2249                                                         },
2250                                                 }
2251                                                 assert_eq!(*amount_msat, recv_value);
2252                                                 assert!(node.node.list_channels().iter().any(|details| details.channel_id == via_channel_id.unwrap()));
2253                                                 assert!(node.node.list_channels().iter().any(|details| details.user_channel_id == via_user_channel_id.unwrap()));
2254                                                 assert!(claim_deadline.unwrap() > node.best_block_info().1);
2255                                         },
2256                                         _ => panic!("Unexpected event"),
2257                                 }
2258                                 event = Some(events_2[0].clone());
2259                         } else {
2260                                 assert!(events_2.is_empty());
2261                         }
2262                 } else if idx != expected_path.len() - 1 {
2263                         let mut events_2 = node.node.get_and_clear_pending_msg_events();
2264                         assert_eq!(events_2.len(), 1);
2265                         check_added_monitors!(node, 1);
2266                         payment_event = SendEvent::from_event(events_2.remove(0));
2267                         assert_eq!(payment_event.msgs.len(), 1);
2268                 }
2269
2270                 prev_node = node;
2271         }
2272         event
2273 }
2274
2275 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>) -> Option<Event> {
2276         do_pass_along_path(origin_node, expected_path, recv_value, our_payment_hash, our_payment_secret, ev, payment_claimable_expected, true, expected_preimage)
2277 }
2278
2279 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) {
2280         let mut events = origin_node.node.get_and_clear_pending_msg_events();
2281         assert_eq!(events.len(), expected_route.len());
2282         for (path_idx, expected_path) in expected_route.iter().enumerate() {
2283                 let ev = remove_first_msg_event_to_node(&expected_path[0].node.get_our_node_id(), &mut events);
2284                 // Once we've gotten through all the HTLCs, the last one should result in a
2285                 // PaymentClaimable (but each previous one should not!), .
2286                 let expect_payment = path_idx == expected_route.len() - 1;
2287                 pass_along_path(origin_node, expected_path, recv_value, our_payment_hash.clone(), Some(our_payment_secret), ev, expect_payment, None);
2288         }
2289 }
2290
2291 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) {
2292         let (our_payment_preimage, our_payment_hash, our_payment_secret) = get_payment_preimage_hash!(expected_route.last().unwrap());
2293         let payment_id = send_along_route_with_secret(origin_node, route, &[expected_route], recv_value, our_payment_hash, our_payment_secret);
2294         (our_payment_preimage, our_payment_hash, our_payment_secret, payment_id)
2295 }
2296
2297 pub fn do_claim_payment_along_route<'a, 'b, 'c>(
2298         origin_node: &Node<'a, 'b, 'c>, expected_paths: &[&[&Node<'a, 'b, 'c>]], skip_last: bool,
2299         our_payment_preimage: PaymentPreimage
2300 ) -> u64 {
2301         let extra_fees = vec![0; expected_paths.len()];
2302         do_claim_payment_along_route_with_extra_penultimate_hop_fees(origin_node, expected_paths,
2303                 &extra_fees[..], skip_last, our_payment_preimage)
2304 }
2305
2306 pub fn do_claim_payment_along_route_with_extra_penultimate_hop_fees<'a, 'b, 'c>(
2307         origin_node: &Node<'a, 'b, 'c>, expected_paths: &[&[&Node<'a, 'b, 'c>]], expected_extra_fees:
2308         &[u32], skip_last: bool, our_payment_preimage: PaymentPreimage
2309 ) -> u64 {
2310         assert_eq!(expected_paths.len(), expected_extra_fees.len());
2311         for path in expected_paths.iter() {
2312                 assert_eq!(path.last().unwrap().node.get_our_node_id(), expected_paths[0].last().unwrap().node.get_our_node_id());
2313         }
2314         expected_paths[0].last().unwrap().node.claim_funds(our_payment_preimage);
2315         pass_claimed_payment_along_route(origin_node, expected_paths, expected_extra_fees, skip_last, our_payment_preimage)
2316 }
2317
2318 pub fn pass_claimed_payment_along_route<'a, 'b, 'c>(origin_node: &Node<'a, 'b, 'c>, expected_paths: &[&[&Node<'a, 'b, 'c>]], expected_extra_fees: &[u32], skip_last: bool, our_payment_preimage: PaymentPreimage) -> u64 {
2319         let claim_event = expected_paths[0].last().unwrap().node.get_and_clear_pending_events();
2320         assert_eq!(claim_event.len(), 1);
2321         match claim_event[0] {
2322                 Event::PaymentClaimed {
2323                         purpose: PaymentPurpose::SpontaneousPayment(preimage),
2324                         amount_msat,
2325                         ref htlcs,
2326                         .. }
2327                 | Event::PaymentClaimed {
2328                         purpose: PaymentPurpose::InvoicePayment { payment_preimage: Some(preimage), ..},
2329                         ref htlcs,
2330                         amount_msat,
2331                         ..
2332                 } => {
2333                         assert_eq!(preimage, our_payment_preimage);
2334                         assert_eq!(htlcs.len(), expected_paths.len());  // One per path.
2335                         assert_eq!(htlcs.iter().map(|h| h.value_msat).sum::<u64>(), amount_msat);
2336                         expected_paths.iter().zip(htlcs).for_each(|(path, htlc)| check_claimed_htlc_channel(origin_node, path, htlc));
2337                 },
2338                 Event::PaymentClaimed {
2339                         purpose: PaymentPurpose::InvoicePayment { .. },
2340                         payment_hash,
2341                         amount_msat,
2342                         ref htlcs,
2343                         ..
2344                 } => {
2345                         assert_eq!(&payment_hash.0, &Sha256::hash(&our_payment_preimage.0)[..]);
2346                         assert_eq!(htlcs.len(), expected_paths.len());  // One per path.
2347                         assert_eq!(htlcs.iter().map(|h| h.value_msat).sum::<u64>(), amount_msat);
2348                         expected_paths.iter().zip(htlcs).for_each(|(path, htlc)| check_claimed_htlc_channel(origin_node, path, htlc));
2349                 }
2350                 _ => panic!(),
2351         }
2352
2353         check_added_monitors!(expected_paths[0].last().unwrap(), expected_paths.len());
2354
2355         let mut expected_total_fee_msat = 0;
2356
2357         macro_rules! msgs_from_ev {
2358                 ($ev: expr) => {
2359                         match $ev {
2360                                 &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 } } => {
2361                                         assert!(update_add_htlcs.is_empty());
2362                                         assert_eq!(update_fulfill_htlcs.len(), 1);
2363                                         assert!(update_fail_htlcs.is_empty());
2364                                         assert!(update_fail_malformed_htlcs.is_empty());
2365                                         assert!(update_fee.is_none());
2366                                         ((update_fulfill_htlcs[0].clone(), commitment_signed.clone()), node_id.clone())
2367                                 },
2368                                 _ => panic!("Unexpected event"),
2369                         }
2370                 }
2371         }
2372         let mut per_path_msgs: Vec<((msgs::UpdateFulfillHTLC, msgs::CommitmentSigned), PublicKey)> = Vec::with_capacity(expected_paths.len());
2373         let mut events = expected_paths[0].last().unwrap().node.get_and_clear_pending_msg_events();
2374         assert_eq!(events.len(), expected_paths.len());
2375
2376         if events.len() == 1 {
2377                 per_path_msgs.push(msgs_from_ev!(&events[0]));
2378         } else {
2379                 for expected_path in expected_paths.iter() {
2380                         // For MPP payments, we always want the message to the first node in the path.
2381                         let ev = remove_first_msg_event_to_node(&expected_path[0].node.get_our_node_id(), &mut events);
2382                         per_path_msgs.push(msgs_from_ev!(&ev));
2383                 }
2384         }
2385
2386         for (i, (expected_route, (path_msgs, next_hop))) in expected_paths.iter().zip(per_path_msgs.drain(..)).enumerate() {
2387                 let mut next_msgs = Some(path_msgs);
2388                 let mut expected_next_node = next_hop;
2389
2390                 macro_rules! last_update_fulfill_dance {
2391                         ($node: expr, $prev_node: expr) => {
2392                                 {
2393                                         $node.node.handle_update_fulfill_htlc(&$prev_node.node.get_our_node_id(), &next_msgs.as_ref().unwrap().0);
2394                                         check_added_monitors!($node, 0);
2395                                         assert!($node.node.get_and_clear_pending_msg_events().is_empty());
2396                                         commitment_signed_dance!($node, $prev_node, next_msgs.as_ref().unwrap().1, false);
2397                                 }
2398                         }
2399                 }
2400                 macro_rules! mid_update_fulfill_dance {
2401                         ($idx: expr, $node: expr, $prev_node: expr, $next_node: expr, $new_msgs: expr) => {
2402                                 {
2403                                         $node.node.handle_update_fulfill_htlc(&$prev_node.node.get_our_node_id(), &next_msgs.as_ref().unwrap().0);
2404                                         let mut fee = {
2405                                                 let per_peer_state = $node.node.per_peer_state.read().unwrap();
2406                                                 let peer_state = per_peer_state.get(&$prev_node.node.get_our_node_id())
2407                                                         .unwrap().lock().unwrap();
2408                                                 let channel = peer_state.channel_by_id.get(&next_msgs.as_ref().unwrap().0.channel_id).unwrap();
2409                                                 if let Some(prev_config) = channel.context().prev_config() {
2410                                                         prev_config.forwarding_fee_base_msat
2411                                                 } else {
2412                                                         channel.context().config().forwarding_fee_base_msat
2413                                                 }
2414                                         };
2415                                         if $idx == 1 { fee += expected_extra_fees[i]; }
2416                                         expect_payment_forwarded!(*$node, $next_node, $prev_node, Some(fee as u64), false, false);
2417                                         expected_total_fee_msat += fee as u64;
2418                                         check_added_monitors!($node, 1);
2419                                         let new_next_msgs = if $new_msgs {
2420                                                 let events = $node.node.get_and_clear_pending_msg_events();
2421                                                 assert_eq!(events.len(), 1);
2422                                                 let (res, nexthop) = msgs_from_ev!(&events[0]);
2423                                                 expected_next_node = nexthop;
2424                                                 Some(res)
2425                                         } else {
2426                                                 assert!($node.node.get_and_clear_pending_msg_events().is_empty());
2427                                                 None
2428                                         };
2429                                         commitment_signed_dance!($node, $prev_node, next_msgs.as_ref().unwrap().1, false);
2430                                         next_msgs = new_next_msgs;
2431                                 }
2432                         }
2433                 }
2434
2435                 let mut prev_node = expected_route.last().unwrap();
2436                 for (idx, node) in expected_route.iter().rev().enumerate().skip(1) {
2437                         assert_eq!(expected_next_node, node.node.get_our_node_id());
2438                         let update_next_msgs = !skip_last || idx != expected_route.len() - 1;
2439                         if next_msgs.is_some() {
2440                                 // Since we are traversing in reverse, next_node is actually the previous node
2441                                 let next_node: &Node;
2442                                 if idx == expected_route.len() - 1 {
2443                                         next_node = origin_node;
2444                                 } else {
2445                                         next_node = expected_route[expected_route.len() - 1 - idx - 1];
2446                                 }
2447                                 mid_update_fulfill_dance!(idx, node, prev_node, next_node, update_next_msgs);
2448                         } else {
2449                                 assert!(!update_next_msgs);
2450                                 assert!(node.node.get_and_clear_pending_msg_events().is_empty());
2451                         }
2452                         if !skip_last && idx == expected_route.len() - 1 {
2453                                 assert_eq!(expected_next_node, origin_node.node.get_our_node_id());
2454                         }
2455
2456                         prev_node = node;
2457                 }
2458
2459                 if !skip_last {
2460                         last_update_fulfill_dance!(origin_node, expected_route.first().unwrap());
2461                 }
2462         }
2463
2464         // Ensure that claim_funds is idempotent.
2465         expected_paths[0].last().unwrap().node.claim_funds(our_payment_preimage);
2466         assert!(expected_paths[0].last().unwrap().node.get_and_clear_pending_msg_events().is_empty());
2467         check_added_monitors!(expected_paths[0].last().unwrap(), 0);
2468
2469         expected_total_fee_msat
2470 }
2471 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) {
2472         let expected_total_fee_msat = do_claim_payment_along_route(origin_node, expected_paths, skip_last, our_payment_preimage);
2473         if !skip_last {
2474                 expect_payment_sent!(origin_node, our_payment_preimage, Some(expected_total_fee_msat));
2475         }
2476 }
2477
2478 pub fn claim_payment<'a, 'b, 'c>(origin_node: &Node<'a, 'b, 'c>, expected_route: &[&Node<'a, 'b, 'c>], our_payment_preimage: PaymentPreimage) {
2479         claim_payment_along_route(origin_node, &[expected_route], false, our_payment_preimage);
2480 }
2481
2482 pub const TEST_FINAL_CLTV: u32 = 70;
2483
2484 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, PaymentId) {
2485         let payment_params = PaymentParameters::from_node_id(expected_route.last().unwrap().node.get_our_node_id(), TEST_FINAL_CLTV)
2486                 .with_bolt11_features(expected_route.last().unwrap().node.invoice_features()).unwrap();
2487         let route_params = RouteParameters::from_payment_params_and_value(payment_params, recv_value);
2488         let route = get_route(origin_node, &route_params).unwrap();
2489         assert_eq!(route.paths.len(), 1);
2490         assert_eq!(route.paths[0].hops.len(), expected_route.len());
2491         for (node, hop) in expected_route.iter().zip(route.paths[0].hops.iter()) {
2492                 assert_eq!(hop.pubkey, node.node.get_our_node_id());
2493         }
2494
2495         let res = send_along_route(origin_node, route, expected_route, recv_value);
2496         (res.0, res.1, res.2, res.3)
2497 }
2498
2499 pub fn route_over_limit<'a, 'b, 'c>(origin_node: &Node<'a, 'b, 'c>, expected_route: &[&Node<'a, 'b, 'c>], recv_value: u64)  {
2500         let payment_params = PaymentParameters::from_node_id(expected_route.last().unwrap().node.get_our_node_id(), TEST_FINAL_CLTV)
2501                 .with_bolt11_features(expected_route.last().unwrap().node.invoice_features()).unwrap();
2502         let route_params = RouteParameters::from_payment_params_and_value(payment_params, recv_value);
2503         let network_graph = origin_node.network_graph.read_only();
2504         let scorer = test_utils::TestScorer::new();
2505         let seed = [0u8; 32];
2506         let keys_manager = test_utils::TestKeysInterface::new(&seed, Network::Testnet);
2507         let random_seed_bytes = keys_manager.get_secure_random_bytes();
2508         let route = router::get_route(&origin_node.node.get_our_node_id(), &route_params, &network_graph,
2509                 None, origin_node.logger, &scorer, &(), &random_seed_bytes).unwrap();
2510         assert_eq!(route.paths.len(), 1);
2511         assert_eq!(route.paths[0].hops.len(), expected_route.len());
2512         for (node, hop) in expected_route.iter().zip(route.paths[0].hops.iter()) {
2513                 assert_eq!(hop.pubkey, node.node.get_our_node_id());
2514         }
2515
2516         let (_, our_payment_hash, our_payment_secret) = get_payment_preimage_hash!(expected_route.last().unwrap());
2517         unwrap_send_err!(origin_node.node.send_payment_with_route(&route, our_payment_hash,
2518                         RecipientOnionFields::secret_only(our_payment_secret), PaymentId(our_payment_hash.0)),
2519                 true, APIError::ChannelUnavailable { ref err },
2520                 assert!(err.contains("Cannot send value that would put us over the max HTLC value in flight our peer will accept")));
2521 }
2522
2523 pub fn send_payment<'a, 'b, 'c>(origin: &Node<'a, 'b, 'c>, expected_route: &[&Node<'a, 'b, 'c>], recv_value: u64) -> (PaymentPreimage, PaymentHash, PaymentSecret, PaymentId) {
2524         let res = route_payment(&origin, expected_route, recv_value);
2525         claim_payment(&origin, expected_route, res.0);
2526         res
2527 }
2528
2529 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) {
2530         for path in expected_paths.iter() {
2531                 assert_eq!(path.last().unwrap().node.get_our_node_id(), expected_paths[0].last().unwrap().node.get_our_node_id());
2532         }
2533         expected_paths[0].last().unwrap().node.fail_htlc_backwards(&our_payment_hash);
2534         let expected_destinations: Vec<HTLCDestination> = repeat(HTLCDestination::FailedPayment { payment_hash: our_payment_hash }).take(expected_paths.len()).collect();
2535         expect_pending_htlcs_forwardable_and_htlc_handling_failed!(expected_paths[0].last().unwrap(), expected_destinations);
2536
2537         pass_failed_payment_back(origin_node, expected_paths, skip_last, our_payment_hash, PaymentFailureReason::RecipientRejected);
2538 }
2539
2540 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, expected_fail_reason: PaymentFailureReason) {
2541         let mut expected_paths: Vec<_> = expected_paths_slice.iter().collect();
2542         check_added_monitors!(expected_paths[0].last().unwrap(), expected_paths.len());
2543
2544         let mut per_path_msgs: Vec<((msgs::UpdateFailHTLC, msgs::CommitmentSigned), PublicKey)> = Vec::with_capacity(expected_paths.len());
2545         let events = expected_paths[0].last().unwrap().node.get_and_clear_pending_msg_events();
2546         assert_eq!(events.len(), expected_paths.len());
2547         for ev in events.iter() {
2548                 let (update_fail, commitment_signed, node_id) = match ev {
2549                         &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 } } => {
2550                                 assert!(update_add_htlcs.is_empty());
2551                                 assert!(update_fulfill_htlcs.is_empty());
2552                                 assert_eq!(update_fail_htlcs.len(), 1);
2553                                 assert!(update_fail_malformed_htlcs.is_empty());
2554                                 assert!(update_fee.is_none());
2555                                 (update_fail_htlcs[0].clone(), commitment_signed.clone(), node_id.clone())
2556                         },
2557                         _ => panic!("Unexpected event"),
2558                 };
2559                 per_path_msgs.push(((update_fail, commitment_signed), node_id));
2560         }
2561         per_path_msgs.sort_unstable_by(|(_, node_id_a), (_, node_id_b)| node_id_a.cmp(node_id_b));
2562         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()));
2563
2564         for (i, (expected_route, (path_msgs, next_hop))) in expected_paths.iter().zip(per_path_msgs.drain(..)).enumerate() {
2565                 let mut next_msgs = Some(path_msgs);
2566                 let mut expected_next_node = next_hop;
2567                 let mut prev_node = expected_route.last().unwrap();
2568
2569                 for (idx, node) in expected_route.iter().rev().enumerate().skip(1) {
2570                         assert_eq!(expected_next_node, node.node.get_our_node_id());
2571                         let update_next_node = !skip_last || idx != expected_route.len() - 1;
2572                         if next_msgs.is_some() {
2573                                 node.node.handle_update_fail_htlc(&prev_node.node.get_our_node_id(), &next_msgs.as_ref().unwrap().0);
2574                                 commitment_signed_dance!(node, prev_node, next_msgs.as_ref().unwrap().1, update_next_node);
2575                                 if !update_next_node {
2576                                         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 }]);
2577                                 }
2578                         }
2579                         let events = node.node.get_and_clear_pending_msg_events();
2580                         if update_next_node {
2581                                 assert_eq!(events.len(), 1);
2582                                 match events[0] {
2583                                         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 } } => {
2584                                                 assert!(update_add_htlcs.is_empty());
2585                                                 assert!(update_fulfill_htlcs.is_empty());
2586                                                 assert_eq!(update_fail_htlcs.len(), 1);
2587                                                 assert!(update_fail_malformed_htlcs.is_empty());
2588                                                 assert!(update_fee.is_none());
2589                                                 expected_next_node = node_id.clone();
2590                                                 next_msgs = Some((update_fail_htlcs[0].clone(), commitment_signed.clone()));
2591                                         },
2592                                         _ => panic!("Unexpected event"),
2593                                 }
2594                         } else {
2595                                 assert!(events.is_empty());
2596                         }
2597                         if !skip_last && idx == expected_route.len() - 1 {
2598                                 assert_eq!(expected_next_node, origin_node.node.get_our_node_id());
2599                         }
2600
2601                         prev_node = node;
2602                 }
2603
2604                 if !skip_last {
2605                         let prev_node = expected_route.first().unwrap();
2606                         origin_node.node.handle_update_fail_htlc(&prev_node.node.get_our_node_id(), &next_msgs.as_ref().unwrap().0);
2607                         check_added_monitors!(origin_node, 0);
2608                         assert!(origin_node.node.get_and_clear_pending_msg_events().is_empty());
2609                         commitment_signed_dance!(origin_node, prev_node, next_msgs.as_ref().unwrap().1, false);
2610                         let events = origin_node.node.get_and_clear_pending_events();
2611                         if i == expected_paths.len() - 1 { assert_eq!(events.len(), 2); } else { assert_eq!(events.len(), 1); }
2612
2613                         let expected_payment_id = match events[0] {
2614                                 Event::PaymentPathFailed { payment_hash, payment_failed_permanently, ref path, ref payment_id, .. } => {
2615                                         assert_eq!(payment_hash, our_payment_hash);
2616                                         assert!(payment_failed_permanently);
2617                                         for (idx, hop) in expected_route.iter().enumerate() {
2618                                                 assert_eq!(hop.node.get_our_node_id(), path.hops[idx].pubkey);
2619                                         }
2620                                         payment_id.unwrap()
2621                                 },
2622                                 _ => panic!("Unexpected event"),
2623                         };
2624                         if i == expected_paths.len() - 1 {
2625                                 match events[1] {
2626                                         Event::PaymentFailed { ref payment_hash, ref payment_id, ref reason } => {
2627                                                 assert_eq!(*payment_hash, our_payment_hash, "unexpected second payment_hash");
2628                                                 assert_eq!(*payment_id, expected_payment_id);
2629                                                 assert_eq!(reason.unwrap(), expected_fail_reason);
2630                                         }
2631                                         _ => panic!("Unexpected second event"),
2632                                 }
2633                         }
2634                 }
2635         }
2636
2637         // Ensure that fail_htlc_backwards is idempotent.
2638         expected_paths[0].last().unwrap().node.fail_htlc_backwards(&our_payment_hash);
2639         assert!(expected_paths[0].last().unwrap().node.get_and_clear_pending_events().is_empty());
2640         assert!(expected_paths[0].last().unwrap().node.get_and_clear_pending_msg_events().is_empty());
2641         check_added_monitors!(expected_paths[0].last().unwrap(), 0);
2642 }
2643
2644 pub fn fail_payment<'a, 'b, 'c>(origin_node: &Node<'a, 'b, 'c>, expected_path: &[&Node<'a, 'b, 'c>], our_payment_hash: PaymentHash)  {
2645         fail_payment_along_route(origin_node, &[&expected_path[..]], false, our_payment_hash);
2646 }
2647
2648 pub fn create_chanmon_cfgs(node_count: usize) -> Vec<TestChanMonCfg> {
2649         let mut chan_mon_cfgs = Vec::new();
2650         for i in 0..node_count {
2651                 let tx_broadcaster = test_utils::TestBroadcaster::new(Network::Testnet);
2652                 let fee_estimator = test_utils::TestFeeEstimator { sat_per_kw: Mutex::new(253) };
2653                 let chain_source = test_utils::TestChainSource::new(Network::Testnet);
2654                 let logger = test_utils::TestLogger::with_id(format!("node {}", i));
2655                 let persister = test_utils::TestPersister::new();
2656                 let seed = [i as u8; 32];
2657                 let keys_manager = test_utils::TestKeysInterface::new(&seed, Network::Testnet);
2658                 let scorer = RwLock::new(test_utils::TestScorer::new());
2659
2660                 chan_mon_cfgs.push(TestChanMonCfg { tx_broadcaster, fee_estimator, chain_source, logger, persister, keys_manager, scorer });
2661         }
2662
2663         chan_mon_cfgs
2664 }
2665
2666 pub fn create_node_cfgs<'a>(node_count: usize, chanmon_cfgs: &'a Vec<TestChanMonCfg>) -> Vec<NodeCfg<'a>> {
2667         create_node_cfgs_with_persisters(node_count, chanmon_cfgs, chanmon_cfgs.iter().map(|c| &c.persister).collect())
2668 }
2669
2670 pub fn create_node_cfgs_with_persisters<'a>(node_count: usize, chanmon_cfgs: &'a Vec<TestChanMonCfg>, persisters: Vec<&'a impl Persist<TestChannelSigner>>) -> Vec<NodeCfg<'a>> {
2671         let mut nodes = Vec::new();
2672
2673         for i in 0..node_count {
2674                 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, persisters[i], &chanmon_cfgs[i].keys_manager);
2675                 let network_graph = Arc::new(NetworkGraph::new(Network::Testnet, &chanmon_cfgs[i].logger));
2676                 let seed = [i as u8; 32];
2677                 nodes.push(NodeCfg {
2678                         chain_source: &chanmon_cfgs[i].chain_source,
2679                         logger: &chanmon_cfgs[i].logger,
2680                         tx_broadcaster: &chanmon_cfgs[i].tx_broadcaster,
2681                         fee_estimator: &chanmon_cfgs[i].fee_estimator,
2682                         router: test_utils::TestRouter::new(network_graph.clone(), &chanmon_cfgs[i].scorer),
2683                         chain_monitor,
2684                         keys_manager: &chanmon_cfgs[i].keys_manager,
2685                         node_seed: seed,
2686                         network_graph,
2687                         override_init_features: Rc::new(RefCell::new(None)),
2688                 });
2689         }
2690
2691         nodes
2692 }
2693
2694 pub fn test_default_channel_config() -> UserConfig {
2695         let mut default_config = UserConfig::default();
2696         // Set cltv_expiry_delta slightly lower to keep the final CLTV values inside one byte in our
2697         // tests so that our script-length checks don't fail (see ACCEPTED_HTLC_SCRIPT_WEIGHT).
2698         default_config.channel_config.cltv_expiry_delta = MIN_CLTV_EXPIRY_DELTA;
2699         default_config.channel_handshake_config.announced_channel = true;
2700         default_config.channel_handshake_limits.force_announced_channel_preference = false;
2701         // When most of our tests were written, the default HTLC minimum was fixed at 1000.
2702         // It now defaults to 1, so we simply set it to the expected value here.
2703         default_config.channel_handshake_config.our_htlc_minimum_msat = 1000;
2704         // When most of our tests were written, we didn't have the notion of a `max_dust_htlc_exposure_msat`,
2705         // to avoid interfering with tests we bump it to 50_000_000 msat (assuming the default test
2706         // feerate of 253).
2707         default_config.channel_config.max_dust_htlc_exposure =
2708                 MaxDustHTLCExposure::FeeRateMultiplier(50_000_000 / 253);
2709         default_config
2710 }
2711
2712 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>> {
2713         let mut chanmgrs = Vec::new();
2714         for i in 0..node_count {
2715                 let network = Network::Testnet;
2716                 let genesis_block = bitcoin::blockdata::constants::genesis_block(network);
2717                 let params = ChainParameters {
2718                         network,
2719                         best_block: BestBlock::from_network(network),
2720                 };
2721                 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,
2722                         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, genesis_block.header.time);
2723                 chanmgrs.push(node);
2724         }
2725
2726         chanmgrs
2727 }
2728
2729 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>> {
2730         let mut nodes = Vec::new();
2731         let chan_count = Rc::new(RefCell::new(0));
2732         let payment_count = Rc::new(RefCell::new(0));
2733         let connect_style = Rc::new(RefCell::new(ConnectStyle::random_style()));
2734
2735         for i in 0..node_count {
2736                 let gossip_sync = P2PGossipSync::new(cfgs[i].network_graph.as_ref(), None, cfgs[i].logger);
2737                 let wallet_source = Arc::new(test_utils::TestWalletSource::new(SecretKey::from_slice(&[i as u8 + 1; 32]).unwrap()));
2738                 nodes.push(Node{
2739                         chain_source: cfgs[i].chain_source, tx_broadcaster: cfgs[i].tx_broadcaster,
2740                         fee_estimator: cfgs[i].fee_estimator, router: &cfgs[i].router,
2741                         chain_monitor: &cfgs[i].chain_monitor, keys_manager: &cfgs[i].keys_manager,
2742                         node: &chan_mgrs[i], network_graph: cfgs[i].network_graph.as_ref(), gossip_sync,
2743                         node_seed: cfgs[i].node_seed, network_chan_count: chan_count.clone(),
2744                         network_payment_count: payment_count.clone(), logger: cfgs[i].logger,
2745                         blocks: Arc::clone(&cfgs[i].tx_broadcaster.blocks),
2746                         connect_style: Rc::clone(&connect_style),
2747                         override_init_features: Rc::clone(&cfgs[i].override_init_features),
2748                         wallet_source: Arc::clone(&wallet_source),
2749                         bump_tx_handler: BumpTransactionEventHandler::new(
2750                                 cfgs[i].tx_broadcaster, Arc::new(Wallet::new(Arc::clone(&wallet_source), cfgs[i].logger)),
2751                                 &cfgs[i].keys_manager, cfgs[i].logger,
2752                         ),
2753                 })
2754         }
2755
2756         for i in 0..node_count {
2757                 for j in (i+1)..node_count {
2758                         nodes[i].node.peer_connected(&nodes[j].node.get_our_node_id(), &msgs::Init {
2759                                 features: nodes[j].override_init_features.borrow().clone().unwrap_or_else(|| nodes[j].node.init_features()),
2760                                 networks: None,
2761                                 remote_network_address: None,
2762                         }, true).unwrap();
2763                         nodes[j].node.peer_connected(&nodes[i].node.get_our_node_id(), &msgs::Init {
2764                                 features: nodes[i].override_init_features.borrow().clone().unwrap_or_else(|| nodes[i].node.init_features()),
2765                                 networks: None,
2766                                 remote_network_address: None,
2767                         }, false).unwrap();
2768                 }
2769         }
2770
2771         nodes
2772 }
2773
2774 // Note that the following only works for CLTV values up to 128
2775 pub const ACCEPTED_HTLC_SCRIPT_WEIGHT: usize = 137; //Here we have a diff due to HTLC CLTV expiry being < 2^15 in test
2776
2777 #[derive(PartialEq)]
2778 pub enum HTLCType { NONE, TIMEOUT, SUCCESS }
2779 /// Tests that the given node has broadcast transactions for the given Channel
2780 ///
2781 /// First checks that the latest holder commitment tx has been broadcast, unless an explicit
2782 /// commitment_tx is provided, which may be used to test that a remote commitment tx was
2783 /// broadcast and the revoked outputs were claimed.
2784 ///
2785 /// Next tests that there is (or is not) a transaction that spends the commitment transaction
2786 /// that appears to be the type of HTLC transaction specified in has_htlc_tx.
2787 ///
2788 /// All broadcast transactions must be accounted for in one of the above three types of we'll
2789 /// also fail.
2790 pub fn test_txn_broadcast<'a, 'b, 'c>(node: &Node<'a, 'b, 'c>, chan: &(msgs::ChannelUpdate, msgs::ChannelUpdate, ChannelId, Transaction), commitment_tx: Option<Transaction>, has_htlc_tx: HTLCType) -> Vec<Transaction>  {
2791         let mut node_txn = node.tx_broadcaster.txn_broadcasted.lock().unwrap();
2792         let mut txn_seen = HashSet::new();
2793         node_txn.retain(|tx| txn_seen.insert(tx.txid()));
2794         assert!(node_txn.len() >= if commitment_tx.is_some() { 0 } else { 1 } + if has_htlc_tx == HTLCType::NONE { 0 } else { 1 });
2795
2796         let mut res = Vec::with_capacity(2);
2797         node_txn.retain(|tx| {
2798                 if tx.input.len() == 1 && tx.input[0].previous_output.txid == chan.3.txid() {
2799                         check_spends!(tx, chan.3);
2800                         if commitment_tx.is_none() {
2801                                 res.push(tx.clone());
2802                         }
2803                         false
2804                 } else { true }
2805         });
2806         if let Some(explicit_tx) = commitment_tx {
2807                 res.push(explicit_tx.clone());
2808         }
2809
2810         assert_eq!(res.len(), 1);
2811
2812         if has_htlc_tx != HTLCType::NONE {
2813                 node_txn.retain(|tx| {
2814                         if tx.input.len() == 1 && tx.input[0].previous_output.txid == res[0].txid() {
2815                                 check_spends!(tx, res[0]);
2816                                 if has_htlc_tx == HTLCType::TIMEOUT {
2817                                         assert!(tx.lock_time.0 != 0);
2818                                 } else {
2819                                         assert!(tx.lock_time.0 == 0);
2820                                 }
2821                                 res.push(tx.clone());
2822                                 false
2823                         } else { true }
2824                 });
2825                 assert!(res.len() == 2 || res.len() == 3);
2826                 if res.len() == 3 {
2827                         assert_eq!(res[1], res[2]);
2828                 }
2829         }
2830
2831         assert!(node_txn.is_empty());
2832         res
2833 }
2834
2835 /// Tests that the given node has broadcast a claim transaction against the provided revoked
2836 /// HTLC transaction.
2837 pub fn test_revoked_htlc_claim_txn_broadcast<'a, 'b, 'c>(node: &Node<'a, 'b, 'c>, revoked_tx: Transaction, commitment_revoked_tx: Transaction)  {
2838         let mut node_txn = node.tx_broadcaster.txn_broadcasted.lock().unwrap();
2839         // We may issue multiple claiming transaction on revoked outputs due to block rescan
2840         // for revoked htlc outputs
2841         if node_txn.len() != 1 && node_txn.len() != 2 && node_txn.len() != 3 { assert!(false); }
2842         node_txn.retain(|tx| {
2843                 if tx.input.len() == 1 && tx.input[0].previous_output.txid == revoked_tx.txid() {
2844                         check_spends!(tx, revoked_tx);
2845                         false
2846                 } else { true }
2847         });
2848         node_txn.retain(|tx| {
2849                 check_spends!(tx, commitment_revoked_tx);
2850                 false
2851         });
2852         assert!(node_txn.is_empty());
2853 }
2854
2855 pub fn check_preimage_claim<'a, 'b, 'c>(node: &Node<'a, 'b, 'c>, prev_txn: &Vec<Transaction>) -> Vec<Transaction>  {
2856         let mut node_txn = node.tx_broadcaster.txn_broadcasted.lock().unwrap();
2857         let mut txn_seen = HashSet::new();
2858         node_txn.retain(|tx| txn_seen.insert(tx.txid()));
2859
2860         let mut found_prev = false;
2861         for prev_tx in prev_txn {
2862                 for tx in &*node_txn {
2863                         if tx.input[0].previous_output.txid == prev_tx.txid() {
2864                                 check_spends!(tx, prev_tx);
2865                                 let mut iter = tx.input[0].witness.iter();
2866                                 iter.next().expect("expected 3 witness items");
2867                                 iter.next().expect("expected 3 witness items");
2868                                 assert!(iter.next().expect("expected 3 witness items").len() > 106); // must spend an htlc output
2869                                 assert_eq!(tx.input.len(), 1); // must spend a commitment tx
2870
2871                                 found_prev = true;
2872                                 break;
2873                         }
2874                 }
2875         }
2876         assert!(found_prev);
2877
2878         let mut res = Vec::new();
2879         mem::swap(&mut *node_txn, &mut res);
2880         res
2881 }
2882
2883 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)  {
2884         let events_1 = nodes[a].node.get_and_clear_pending_msg_events();
2885         assert_eq!(events_1.len(), 2);
2886         let as_update = match events_1[0] {
2887                 MessageSendEvent::BroadcastChannelUpdate { ref msg } => {
2888                         msg.clone()
2889                 },
2890                 _ => panic!("Unexpected event"),
2891         };
2892         match events_1[1] {
2893                 MessageSendEvent::HandleError { node_id, action: msgs::ErrorAction::SendErrorMessage { ref msg } } => {
2894                         assert_eq!(node_id, nodes[b].node.get_our_node_id());
2895                         assert_eq!(msg.data, expected_error);
2896                         if needs_err_handle {
2897                                 nodes[b].node.handle_error(&nodes[a].node.get_our_node_id(), msg);
2898                         }
2899                 },
2900                 _ => panic!("Unexpected event"),
2901         }
2902
2903         let events_2 = nodes[b].node.get_and_clear_pending_msg_events();
2904         assert_eq!(events_2.len(), if needs_err_handle { 1 } else { 2 });
2905         let bs_update = match events_2[0] {
2906                 MessageSendEvent::BroadcastChannelUpdate { ref msg } => {
2907                         msg.clone()
2908                 },
2909                 _ => panic!("Unexpected event"),
2910         };
2911         if !needs_err_handle {
2912                 match events_2[1] {
2913                         MessageSendEvent::HandleError { node_id, action: msgs::ErrorAction::SendErrorMessage { ref msg } } => {
2914                                 assert_eq!(node_id, nodes[a].node.get_our_node_id());
2915                                 assert_eq!(msg.data, expected_error);
2916                         },
2917                         _ => panic!("Unexpected event"),
2918                 }
2919         }
2920
2921         for node in nodes {
2922                 node.gossip_sync.handle_channel_update(&as_update).unwrap();
2923                 node.gossip_sync.handle_channel_update(&bs_update).unwrap();
2924         }
2925 }
2926
2927 pub fn get_announce_close_broadcast_events<'a, 'b, 'c>(nodes: &Vec<Node<'a, 'b, 'c>>, a: usize, b: usize)  {
2928         handle_announce_close_broadcast_events(nodes, a, b, false, "Channel closed because commitment or closing transaction was confirmed on chain.");
2929 }
2930
2931 #[cfg(test)]
2932 macro_rules! get_channel_value_stat {
2933         ($node: expr, $counterparty_node: expr, $channel_id: expr) => {{
2934                 let peer_state_lock = $node.node.per_peer_state.read().unwrap();
2935                 let chan_lock = peer_state_lock.get(&$counterparty_node.node.get_our_node_id()).unwrap().lock().unwrap();
2936                 let chan = chan_lock.channel_by_id.get(&$channel_id).map(
2937                         |phase| if let ChannelPhase::Funded(chan) = phase { Some(chan) } else { None }
2938                 ).flatten().unwrap();
2939                 chan.get_value_stat()
2940         }}
2941 }
2942
2943 macro_rules! get_chan_reestablish_msgs {
2944         ($src_node: expr, $dst_node: expr) => {
2945                 {
2946                         let mut announcements = $crate::prelude::HashSet::new();
2947                         let mut res = Vec::with_capacity(1);
2948                         for msg in $src_node.node.get_and_clear_pending_msg_events() {
2949                                 if let MessageSendEvent::SendChannelReestablish { ref node_id, ref msg } = msg {
2950                                         assert_eq!(*node_id, $dst_node.node.get_our_node_id());
2951                                         res.push(msg.clone());
2952                                 } else if let MessageSendEvent::SendChannelAnnouncement { ref node_id, ref msg, .. } = msg {
2953                                         assert_eq!(*node_id, $dst_node.node.get_our_node_id());
2954                                         announcements.insert(msg.contents.short_channel_id);
2955                                 } else {
2956                                         panic!("Unexpected event")
2957                                 }
2958                         }
2959                         assert!(announcements.is_empty());
2960                         res
2961                 }
2962         }
2963 }
2964
2965 macro_rules! handle_chan_reestablish_msgs {
2966         ($src_node: expr, $dst_node: expr) => {
2967                 {
2968                         let msg_events = $src_node.node.get_and_clear_pending_msg_events();
2969                         let mut idx = 0;
2970                         let channel_ready = if let Some(&MessageSendEvent::SendChannelReady { ref node_id, ref msg }) = msg_events.get(0) {
2971                                 idx += 1;
2972                                 assert_eq!(*node_id, $dst_node.node.get_our_node_id());
2973                                 Some(msg.clone())
2974                         } else {
2975                                 None
2976                         };
2977
2978                         if let Some(&MessageSendEvent::SendAnnouncementSignatures { ref node_id, msg: _ }) = msg_events.get(idx) {
2979                                 idx += 1;
2980                                 assert_eq!(*node_id, $dst_node.node.get_our_node_id());
2981                         }
2982
2983                         let mut had_channel_update = false; // ChannelUpdate may be now or later, but not both
2984                         if let Some(&MessageSendEvent::SendChannelUpdate { ref node_id, .. }) = msg_events.get(idx) {
2985                                 assert_eq!(*node_id, $dst_node.node.get_our_node_id());
2986                                 idx += 1;
2987                                 had_channel_update = true;
2988                         }
2989
2990                         let mut revoke_and_ack = None;
2991                         let mut commitment_update = None;
2992                         let order = if let Some(ev) = msg_events.get(idx) {
2993                                 match ev {
2994                                         &MessageSendEvent::SendRevokeAndACK { ref node_id, ref msg } => {
2995                                                 assert_eq!(*node_id, $dst_node.node.get_our_node_id());
2996                                                 revoke_and_ack = Some(msg.clone());
2997                                                 idx += 1;
2998                                                 RAACommitmentOrder::RevokeAndACKFirst
2999                                         },
3000                                         &MessageSendEvent::UpdateHTLCs { ref node_id, ref updates } => {
3001                                                 assert_eq!(*node_id, $dst_node.node.get_our_node_id());
3002                                                 commitment_update = Some(updates.clone());
3003                                                 idx += 1;
3004                                                 RAACommitmentOrder::CommitmentFirst
3005                                         },
3006                                         _ => RAACommitmentOrder::CommitmentFirst,
3007                                 }
3008                         } else {
3009                                 RAACommitmentOrder::CommitmentFirst
3010                         };
3011
3012                         if let Some(ev) = msg_events.get(idx) {
3013                                 match ev {
3014                                         &MessageSendEvent::SendRevokeAndACK { ref node_id, ref msg } => {
3015                                                 assert_eq!(*node_id, $dst_node.node.get_our_node_id());
3016                                                 assert!(revoke_and_ack.is_none());
3017                                                 revoke_and_ack = Some(msg.clone());
3018                                                 idx += 1;
3019                                         },
3020                                         &MessageSendEvent::UpdateHTLCs { ref node_id, ref updates } => {
3021                                                 assert_eq!(*node_id, $dst_node.node.get_our_node_id());
3022                                                 assert!(commitment_update.is_none());
3023                                                 commitment_update = Some(updates.clone());
3024                                                 idx += 1;
3025                                         },
3026                                         _ => {},
3027                                 }
3028                         }
3029
3030                         if let Some(&MessageSendEvent::SendChannelUpdate { ref node_id, .. }) = msg_events.get(idx) {
3031                                 assert_eq!(*node_id, $dst_node.node.get_our_node_id());
3032                                 idx += 1;
3033                                 assert!(!had_channel_update);
3034                         }
3035
3036                         assert_eq!(msg_events.len(), idx);
3037
3038                         (channel_ready, revoke_and_ack, commitment_update, order)
3039                 }
3040         }
3041 }
3042
3043 pub struct ReconnectArgs<'a, 'b, 'c, 'd> {
3044         pub node_a: &'a Node<'b, 'c, 'd>,
3045         pub node_b: &'a Node<'b, 'c, 'd>,
3046         pub send_channel_ready: (bool, bool),
3047         pub pending_responding_commitment_signed: (bool, bool),
3048         /// Indicates that the pending responding commitment signed will be a dup for the recipient,
3049         /// and no monitor update is expected
3050         pub pending_responding_commitment_signed_dup_monitor: (bool, bool),
3051         pub pending_htlc_adds: (usize, usize),
3052         pub pending_htlc_claims: (usize, usize),
3053         pub pending_htlc_fails: (usize, usize),
3054         pub pending_cell_htlc_claims: (usize, usize),
3055         pub pending_cell_htlc_fails: (usize, usize),
3056         pub pending_raa: (bool, bool),
3057 }
3058
3059 impl<'a, 'b, 'c, 'd> ReconnectArgs<'a, 'b, 'c, 'd> {
3060         pub fn new(node_a: &'a Node<'b, 'c, 'd>, node_b: &'a Node<'b, 'c, 'd>) -> Self {
3061                 Self {
3062                         node_a,
3063                         node_b,
3064                         send_channel_ready: (false, false),
3065                         pending_responding_commitment_signed: (false, false),
3066                         pending_responding_commitment_signed_dup_monitor: (false, false),
3067                         pending_htlc_adds: (0, 0),
3068                         pending_htlc_claims: (0, 0),
3069                         pending_htlc_fails: (0, 0),
3070                         pending_cell_htlc_claims: (0, 0),
3071                         pending_cell_htlc_fails: (0, 0),
3072                         pending_raa: (false, false),
3073                 }
3074         }
3075 }
3076
3077 /// pending_htlc_adds includes both the holding cell and in-flight update_add_htlcs, whereas
3078 /// for claims/fails they are separated out.
3079 pub fn reconnect_nodes<'a, 'b, 'c, 'd>(args: ReconnectArgs<'a, 'b, 'c, 'd>) {
3080         let ReconnectArgs {
3081                 node_a, node_b, send_channel_ready, pending_htlc_adds, pending_htlc_claims, pending_htlc_fails,
3082                 pending_cell_htlc_claims, pending_cell_htlc_fails, pending_raa,
3083                 pending_responding_commitment_signed, pending_responding_commitment_signed_dup_monitor,
3084         } = args;
3085         node_a.node.peer_connected(&node_b.node.get_our_node_id(), &msgs::Init {
3086                 features: node_b.node.init_features(), networks: None, remote_network_address: None
3087         }, true).unwrap();
3088         let reestablish_1 = get_chan_reestablish_msgs!(node_a, node_b);
3089         node_b.node.peer_connected(&node_a.node.get_our_node_id(), &msgs::Init {
3090                 features: node_a.node.init_features(), networks: None, remote_network_address: None
3091         }, false).unwrap();
3092         let reestablish_2 = get_chan_reestablish_msgs!(node_b, node_a);
3093
3094         if send_channel_ready.0 {
3095                 // If a expects a channel_ready, it better not think it has received a revoke_and_ack
3096                 // from b
3097                 for reestablish in reestablish_1.iter() {
3098                         assert_eq!(reestablish.next_remote_commitment_number, 0);
3099                 }
3100         }
3101         if send_channel_ready.1 {
3102                 // If b expects a channel_ready, it better not think it has received a revoke_and_ack
3103                 // from a
3104                 for reestablish in reestablish_2.iter() {
3105                         assert_eq!(reestablish.next_remote_commitment_number, 0);
3106                 }
3107         }
3108         if send_channel_ready.0 || send_channel_ready.1 {
3109                 // If we expect any channel_ready's, both sides better have set
3110                 // next_holder_commitment_number to 1
3111                 for reestablish in reestablish_1.iter() {
3112                         assert_eq!(reestablish.next_local_commitment_number, 1);
3113                 }
3114                 for reestablish in reestablish_2.iter() {
3115                         assert_eq!(reestablish.next_local_commitment_number, 1);
3116                 }
3117         }
3118
3119         let mut resp_1 = Vec::new();
3120         for msg in reestablish_1 {
3121                 node_b.node.handle_channel_reestablish(&node_a.node.get_our_node_id(), &msg);
3122                 resp_1.push(handle_chan_reestablish_msgs!(node_b, node_a));
3123         }
3124         if pending_cell_htlc_claims.0 != 0 || pending_cell_htlc_fails.0 != 0 {
3125                 check_added_monitors!(node_b, 1);
3126         } else {
3127                 check_added_monitors!(node_b, 0);
3128         }
3129
3130         let mut resp_2 = Vec::new();
3131         for msg in reestablish_2 {
3132                 node_a.node.handle_channel_reestablish(&node_b.node.get_our_node_id(), &msg);
3133                 resp_2.push(handle_chan_reestablish_msgs!(node_a, node_b));
3134         }
3135         if pending_cell_htlc_claims.1 != 0 || pending_cell_htlc_fails.1 != 0 {
3136                 check_added_monitors!(node_a, 1);
3137         } else {
3138                 check_added_monitors!(node_a, 0);
3139         }
3140
3141         // We don't yet support both needing updates, as that would require a different commitment dance:
3142         assert!((pending_htlc_adds.0 == 0 && pending_htlc_claims.0 == 0 && pending_htlc_fails.0 == 0 &&
3143                          pending_cell_htlc_claims.0 == 0 && pending_cell_htlc_fails.0 == 0) ||
3144                         (pending_htlc_adds.1 == 0 && pending_htlc_claims.1 == 0 && pending_htlc_fails.1 == 0 &&
3145                          pending_cell_htlc_claims.1 == 0 && pending_cell_htlc_fails.1 == 0));
3146
3147         for chan_msgs in resp_1.drain(..) {
3148                 if send_channel_ready.0 {
3149                         node_a.node.handle_channel_ready(&node_b.node.get_our_node_id(), &chan_msgs.0.unwrap());
3150                         let announcement_event = node_a.node.get_and_clear_pending_msg_events();
3151                         if !announcement_event.is_empty() {
3152                                 assert_eq!(announcement_event.len(), 1);
3153                                 if let MessageSendEvent::SendChannelUpdate { .. } = announcement_event[0] {
3154                                         //TODO: Test announcement_sigs re-sending
3155                                 } else { panic!("Unexpected event! {:?}", announcement_event[0]); }
3156                         }
3157                 } else {
3158                         assert!(chan_msgs.0.is_none());
3159                 }
3160                 if pending_raa.0 {
3161                         assert!(chan_msgs.3 == RAACommitmentOrder::RevokeAndACKFirst);
3162                         node_a.node.handle_revoke_and_ack(&node_b.node.get_our_node_id(), &chan_msgs.1.unwrap());
3163                         assert!(node_a.node.get_and_clear_pending_msg_events().is_empty());
3164                         check_added_monitors!(node_a, 1);
3165                 } else {
3166                         assert!(chan_msgs.1.is_none());
3167                 }
3168                 if pending_htlc_adds.0 != 0 || pending_htlc_claims.0 != 0 || pending_htlc_fails.0 != 0 ||
3169                         pending_cell_htlc_claims.0 != 0 || pending_cell_htlc_fails.0 != 0 ||
3170                         pending_responding_commitment_signed.0
3171                 {
3172                         let commitment_update = chan_msgs.2.unwrap();
3173                         assert_eq!(commitment_update.update_add_htlcs.len(), pending_htlc_adds.0);
3174                         assert_eq!(commitment_update.update_fulfill_htlcs.len(), pending_htlc_claims.0 + pending_cell_htlc_claims.0);
3175                         assert_eq!(commitment_update.update_fail_htlcs.len(), pending_htlc_fails.0 + pending_cell_htlc_fails.0);
3176                         assert!(commitment_update.update_fail_malformed_htlcs.is_empty());
3177                         for update_add in commitment_update.update_add_htlcs {
3178                                 node_a.node.handle_update_add_htlc(&node_b.node.get_our_node_id(), &update_add);
3179                         }
3180                         for update_fulfill in commitment_update.update_fulfill_htlcs {
3181                                 node_a.node.handle_update_fulfill_htlc(&node_b.node.get_our_node_id(), &update_fulfill);
3182                         }
3183                         for update_fail in commitment_update.update_fail_htlcs {
3184                                 node_a.node.handle_update_fail_htlc(&node_b.node.get_our_node_id(), &update_fail);
3185                         }
3186
3187                         if !pending_responding_commitment_signed.0 {
3188                                 commitment_signed_dance!(node_a, node_b, commitment_update.commitment_signed, false);
3189                         } else {
3190                                 node_a.node.handle_commitment_signed(&node_b.node.get_our_node_id(), &commitment_update.commitment_signed);
3191                                 check_added_monitors!(node_a, 1);
3192                                 let as_revoke_and_ack = get_event_msg!(node_a, MessageSendEvent::SendRevokeAndACK, node_b.node.get_our_node_id());
3193                                 // No commitment_signed so get_event_msg's assert(len == 1) passes
3194                                 node_b.node.handle_revoke_and_ack(&node_a.node.get_our_node_id(), &as_revoke_and_ack);
3195                                 assert!(node_b.node.get_and_clear_pending_msg_events().is_empty());
3196                                 check_added_monitors!(node_b, if pending_responding_commitment_signed_dup_monitor.0 { 0 } else { 1 });
3197                         }
3198                 } else {
3199                         assert!(chan_msgs.2.is_none());
3200                 }
3201         }
3202
3203         for chan_msgs in resp_2.drain(..) {
3204                 if send_channel_ready.1 {
3205                         node_b.node.handle_channel_ready(&node_a.node.get_our_node_id(), &chan_msgs.0.unwrap());
3206                         let announcement_event = node_b.node.get_and_clear_pending_msg_events();
3207                         if !announcement_event.is_empty() {
3208                                 assert_eq!(announcement_event.len(), 1);
3209                                 match announcement_event[0] {
3210                                         MessageSendEvent::SendChannelUpdate { .. } => {},
3211                                         MessageSendEvent::SendAnnouncementSignatures { .. } => {},
3212                                         _ => panic!("Unexpected event {:?}!", announcement_event[0]),
3213                                 }
3214                         }
3215                 } else {
3216                         assert!(chan_msgs.0.is_none());
3217                 }
3218                 if pending_raa.1 {
3219                         assert!(chan_msgs.3 == RAACommitmentOrder::RevokeAndACKFirst);
3220                         node_b.node.handle_revoke_and_ack(&node_a.node.get_our_node_id(), &chan_msgs.1.unwrap());
3221                         assert!(node_b.node.get_and_clear_pending_msg_events().is_empty());
3222                         check_added_monitors!(node_b, 1);
3223                 } else {
3224                         assert!(chan_msgs.1.is_none());
3225                 }
3226                 if pending_htlc_adds.1 != 0 || pending_htlc_claims.1 != 0 || pending_htlc_fails.1 != 0 ||
3227                         pending_cell_htlc_claims.1 != 0 || pending_cell_htlc_fails.1 != 0 ||
3228                         pending_responding_commitment_signed.1
3229                 {
3230                         let commitment_update = chan_msgs.2.unwrap();
3231                         assert_eq!(commitment_update.update_add_htlcs.len(), pending_htlc_adds.1);
3232                         assert_eq!(commitment_update.update_fulfill_htlcs.len(), pending_htlc_claims.1 + pending_cell_htlc_claims.1);
3233                         assert_eq!(commitment_update.update_fail_htlcs.len(), pending_htlc_fails.1 + pending_cell_htlc_fails.1);
3234                         assert!(commitment_update.update_fail_malformed_htlcs.is_empty());
3235                         for update_add in commitment_update.update_add_htlcs {
3236                                 node_b.node.handle_update_add_htlc(&node_a.node.get_our_node_id(), &update_add);
3237                         }
3238                         for update_fulfill in commitment_update.update_fulfill_htlcs {
3239                                 node_b.node.handle_update_fulfill_htlc(&node_a.node.get_our_node_id(), &update_fulfill);
3240                         }
3241                         for update_fail in commitment_update.update_fail_htlcs {
3242                                 node_b.node.handle_update_fail_htlc(&node_a.node.get_our_node_id(), &update_fail);
3243                         }
3244
3245                         if !pending_responding_commitment_signed.1 {
3246                                 commitment_signed_dance!(node_b, node_a, commitment_update.commitment_signed, false);
3247                         } else {
3248                                 node_b.node.handle_commitment_signed(&node_a.node.get_our_node_id(), &commitment_update.commitment_signed);
3249                                 check_added_monitors!(node_b, 1);
3250                                 let bs_revoke_and_ack = get_event_msg!(node_b, MessageSendEvent::SendRevokeAndACK, node_a.node.get_our_node_id());
3251                                 // No commitment_signed so get_event_msg's assert(len == 1) passes
3252                                 node_a.node.handle_revoke_and_ack(&node_b.node.get_our_node_id(), &bs_revoke_and_ack);
3253                                 assert!(node_a.node.get_and_clear_pending_msg_events().is_empty());
3254                                 check_added_monitors!(node_a, if pending_responding_commitment_signed_dup_monitor.1 { 0 } else { 1 });
3255                         }
3256                 } else {
3257                         assert!(chan_msgs.2.is_none());
3258                 }
3259         }
3260 }