_ 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::{self, 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 the given transaction at the given height, mining blocks as required to build to that
  77 /// height
  78 ///
  79 /// Returns the SCID a channel confirmed in the given transaction will have, assuming the funding
  80 /// output is the 1st output in the transaction.
  81 pub fn confirm_transactions_at<'a, 'b, 'c, 'd>(node: &'a Node<'b, 'c, 'd>, txn: &[&Transaction], conf_height: u32) -> u64 {
  82         let first_connect_height = node.best_block_info().1 + 1;
  83         assert!(first_connect_height <= conf_height);
  84         if conf_height > first_connect_height {
  85                 connect_blocks(node, conf_height - first_connect_height);
  86         }
  87         let mut txdata = Vec::new();
  88         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
  89                 txdata.push(Transaction { version: 0, lock_time: PackedLockTime::ZERO, input: Vec::new(), output: Vec::new() });
  90         }
  91         for tx in txn {
  92                 txdata.push((*tx).clone());
  93         }
  94         let block = create_dummy_block(node.best_block_hash(), conf_height, txdata);
  95         connect_block(node, &block);
  96         scid_utils::scid_from_parts(conf_height as u64, block.txdata.len() as u64 - 1, 0).unwrap()
  97 }
  98 pub fn confirm_transaction_at<'a, 'b, 'c, 'd>(node: &'a Node<'b, 'c, 'd>, tx: &Transaction, conf_height: u32) -> u64 {
  99         confirm_transactions_at(node, &[tx], conf_height)
 100 }
 101
 102 /// The possible ways we may notify a ChannelManager of a new block
 103 #[derive(Clone, Copy, Debug, PartialEq)]
 104 pub enum ConnectStyle {
 105         /// Calls `best_block_updated` first, detecting transactions in the block only after receiving
 106         /// the header and height information.
 107         BestBlockFirst,
 108         /// The same as `BestBlockFirst`, however when we have multiple blocks to connect, we only
 109         /// make a single `best_block_updated` call.
 110         BestBlockFirstSkippingBlocks,
 111         /// The same as `BestBlockFirst` when connecting blocks. During disconnection only
 112         /// `transaction_unconfirmed` is called.
 113         BestBlockFirstReorgsOnlyTip,
 114         /// Calls `transactions_confirmed` first, detecting transactions in the block before updating
 115         /// the header and height information.
 116         TransactionsFirst,
 117         /// The same as `TransactionsFirst`, however when we have multiple blocks to connect, we only
 118         /// make a single `best_block_updated` call.
 119         TransactionsFirstSkippingBlocks,
 120         /// The same as `TransactionsFirst`, however when we have multiple blocks to connect, we only
 121         /// make a single `best_block_updated` call. Further, we call `transactions_confirmed` multiple
 122         /// times to ensure it's idempotent.
 123         TransactionsDuplicativelyFirstSkippingBlocks,
 124         /// The same as `TransactionsFirst`, however when we have multiple blocks to connect, we only
 125         /// make a single `best_block_updated` call. Further, we call `transactions_confirmed` multiple
 126         /// times to ensure it's idempotent.
 127         HighlyRedundantTransactionsFirstSkippingBlocks,
 128         /// The same as `TransactionsFirst` when connecting blocks. During disconnection only
 129         /// `transaction_unconfirmed` is called.
 130         TransactionsFirstReorgsOnlyTip,
 131         /// Provides the full block via the `chain::Listen` interface. In the current code this is
 132         /// equivalent to `TransactionsFirst` with some additional assertions.
 133         FullBlockViaListen,
 134 }
 135
 136 impl ConnectStyle {
 137         pub fn skips_blocks(&self) -> bool {
 138                 match self {
 139                         ConnectStyle::BestBlockFirst => false,
 140                         ConnectStyle::BestBlockFirstSkippingBlocks => true,
 141                         ConnectStyle::BestBlockFirstReorgsOnlyTip => true,
 142                         ConnectStyle::TransactionsFirst => false,
 143                         ConnectStyle::TransactionsFirstSkippingBlocks => true,
 144                         ConnectStyle::TransactionsDuplicativelyFirstSkippingBlocks => true,
 145                         ConnectStyle::HighlyRedundantTransactionsFirstSkippingBlocks => true,
 146                         ConnectStyle::TransactionsFirstReorgsOnlyTip => true,
 147                         ConnectStyle::FullBlockViaListen => false,
 148                 }
 149         }
 150
 151         pub fn updates_best_block_first(&self) -> bool {
 152                 match self {
 153                         ConnectStyle::BestBlockFirst => true,
 154                         ConnectStyle::BestBlockFirstSkippingBlocks => true,
 155                         ConnectStyle::BestBlockFirstReorgsOnlyTip => true,
 156                         ConnectStyle::TransactionsFirst => false,
 157                         ConnectStyle::TransactionsFirstSkippingBlocks => false,
 158                         ConnectStyle::TransactionsDuplicativelyFirstSkippingBlocks => false,
 159                         ConnectStyle::HighlyRedundantTransactionsFirstSkippingBlocks => false,
 160                         ConnectStyle::TransactionsFirstReorgsOnlyTip => false,
 161                         ConnectStyle::FullBlockViaListen => false,
 162                 }
 163         }
 164
 165         fn random_style() -> ConnectStyle {
 166                 #[cfg(feature = "std")] {
 167                         use core::hash::{BuildHasher, Hasher};
 168                         // Get a random value using the only std API to do so - the DefaultHasher
 169                         let rand_val = std::collections::hash_map::RandomState::new().build_hasher().finish();
 170                         let res = match rand_val % 9 {
 171                                 0 => ConnectStyle::BestBlockFirst,
 172                                 1 => ConnectStyle::BestBlockFirstSkippingBlocks,
 173                                 2 => ConnectStyle::BestBlockFirstReorgsOnlyTip,
 174                                 3 => ConnectStyle::TransactionsFirst,
 175                                 4 => ConnectStyle::TransactionsFirstSkippingBlocks,
 176                                 5 => ConnectStyle::TransactionsDuplicativelyFirstSkippingBlocks,
 177                                 6 => ConnectStyle::HighlyRedundantTransactionsFirstSkippingBlocks,
 178                                 7 => ConnectStyle::TransactionsFirstReorgsOnlyTip,
 179                                 8 => ConnectStyle::FullBlockViaListen,
 180                                 _ => unreachable!(),
 181                         };
 182                         eprintln!("Using Block Connection Style: {:?}", res);
 183                         res
 184                 }
 185                 #[cfg(not(feature = "std"))] {
 186                         ConnectStyle::FullBlockViaListen
 187                 }
 188         }
 189 }
 190
 191 pub fn create_dummy_header(prev_blockhash: BlockHash, time: u32) -> BlockHeader {
 192         BlockHeader {
 193                 version: 0x2000_0000,
 194                 prev_blockhash,
 195                 merkle_root: TxMerkleNode::all_zeros(),
 196                 time,
 197                 bits: 42,
 198                 nonce: 42,
 199         }
 200 }
 201
 202 pub fn create_dummy_block(prev_blockhash: BlockHash, time: u32, txdata: Vec<Transaction>) -> Block {
 203         Block { header: create_dummy_header(prev_blockhash, time), txdata }
 204 }
 205
 206 pub fn connect_blocks<'a, 'b, 'c, 'd>(node: &'a Node<'b, 'c, 'd>, depth: u32) -> BlockHash {
 207         let skip_intermediaries = node.connect_style.borrow().skips_blocks();
 208
 209         let height = node.best_block_info().1 + 1;
 210         let mut block = create_dummy_block(node.best_block_hash(), height, Vec::new());
 211         assert!(depth >= 1);
 212         for i in 1..depth {
 213                 let prev_blockhash = block.header.block_hash();
 214                 do_connect_block(node, block, skip_intermediaries);
 215                 block = create_dummy_block(prev_blockhash, height + i, Vec::new());
 216         }
 217         let hash = block.header.block_hash();
 218         do_connect_block(node, block, false);
 219         hash
 220 }
 221
 222 pub fn connect_block<'a, 'b, 'c, 'd>(node: &'a Node<'b, 'c, 'd>, block: &Block) {
 223         do_connect_block(node, block.clone(), false);
 224 }
 225
 226 fn call_claimable_balances<'a, 'b, 'c, 'd>(node: &'a Node<'b, 'c, 'd>) {
 227         // Ensure `get_claimable_balances`' self-tests never panic
 228         for funding_outpoint in node.chain_monitor.chain_monitor.list_monitors() {
 229                 node.chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances();
 230         }
 231 }
 232
 233 fn do_connect_block<'a, 'b, 'c, 'd>(node: &'a Node<'b, 'c, 'd>, block: Block, skip_intermediaries: bool) {
 234         call_claimable_balances(node);
 235         let height = node.best_block_info().1 + 1;
 236         #[cfg(feature = "std")] {
 237                 eprintln!("Connecting block using Block Connection Style: {:?}", *node.connect_style.borrow());
 238         }
 239         // Update the block internally before handing it over to LDK, to ensure our assertions regarding
 240         // transaction broadcast are correct.
 241         node.blocks.lock().unwrap().push((block.clone(), height));
 242         if !skip_intermediaries {
 243                 let txdata: Vec<_> = block.txdata.iter().enumerate().collect();
 244                 match *node.connect_style.borrow() {
 245                         ConnectStyle::BestBlockFirst|ConnectStyle::BestBlockFirstSkippingBlocks|ConnectStyle::BestBlockFirstReorgsOnlyTip => {
 246                                 node.chain_monitor.chain_monitor.best_block_updated(&block.header, height);
 247                                 call_claimable_balances(node);
 248                                 node.chain_monitor.chain_monitor.transactions_confirmed(&block.header, &txdata, height);
 249                                 node.node.best_block_updated(&block.header, height);
 250                                 node.node.transactions_confirmed(&block.header, &txdata, height);
 251                         },
 252                         ConnectStyle::TransactionsFirst|ConnectStyle::TransactionsFirstSkippingBlocks|
 253                         ConnectStyle::TransactionsDuplicativelyFirstSkippingBlocks|ConnectStyle::HighlyRedundantTransactionsFirstSkippingBlocks|
 254                         ConnectStyle::TransactionsFirstReorgsOnlyTip => {
 255                                 if *node.connect_style.borrow() == ConnectStyle::HighlyRedundantTransactionsFirstSkippingBlocks {
 256                                         let mut connections = Vec::new();
 257                                         for (block, height) in node.blocks.lock().unwrap().iter() {
 258                                                 if !block.txdata.is_empty() {
 259                                                         // Reconnect all transactions we've ever seen to ensure transaction connection
 260                                                         // is *really* idempotent. This is a somewhat likely deployment for some
 261                                                         // esplora implementations of chain sync which try to reduce state and
 262                                                         // complexity as much as possible.
 263                                                         //
 264                                                         // Sadly we have to clone the block here to maintain lockorder. In the
 265                                                         // future we should consider Arc'ing the blocks to avoid this.
 266                                                         connections.push((block.clone(), *height));
 267                                                 }
 268                                         }
 269                                         for (old_block, height) in connections {
 270                                                 node.chain_monitor.chain_monitor.transactions_confirmed(&old_block.header,
 271                                                         &old_block.txdata.iter().enumerate().collect::<Vec<_>>(), height);
 272                                         }
 273                                 }
 274                                 node.chain_monitor.chain_monitor.transactions_confirmed(&block.header, &txdata, height);
 275                                 if *node.connect_style.borrow() == ConnectStyle::TransactionsDuplicativelyFirstSkippingBlocks {
 276                                         node.chain_monitor.chain_monitor.transactions_confirmed(&block.header, &txdata, height);
 277                                 }
 278                                 call_claimable_balances(node);
 279                                 node.chain_monitor.chain_monitor.best_block_updated(&block.header, height);
 280                                 node.node.transactions_confirmed(&block.header, &txdata, height);
 281                                 node.node.best_block_updated(&block.header, height);
 282                         },
 283                         ConnectStyle::FullBlockViaListen => {
 284                                 node.chain_monitor.chain_monitor.block_connected(&block, height);
 285                                 node.node.block_connected(&block, height);
 286                         }
 287                 }
 288         }
 289         call_claimable_balances(node);
 290         node.node.test_process_background_events();
 291
 292         for tx in &block.txdata {
 293                 for input in &tx.input {
 294                         node.wallet_source.remove_utxo(input.previous_output);
 295                 }
 296                 let wallet_script = node.wallet_source.get_change_script().unwrap();
 297                 for (idx, output) in tx.output.iter().enumerate() {
 298                         if output.script_pubkey == wallet_script {
 299                                 let outpoint = bitcoin::OutPoint { txid: tx.txid(), vout: idx as u32 };
 300                                 node.wallet_source.add_utxo(outpoint, output.value);
 301                         }
 302                 }
 303         }
 304 }
 305
 306 pub fn disconnect_blocks<'a, 'b, 'c, 'd>(node: &'a Node<'b, 'c, 'd>, count: u32) {
 307         call_claimable_balances(node);
 308         #[cfg(feature = "std")] {
 309                 eprintln!("Disconnecting {} blocks using Block Connection Style: {:?}", count, *node.connect_style.borrow());
 310         }
 311         for i in 0..count {
 312                 let orig = node.blocks.lock().unwrap().pop().unwrap();
 313                 assert!(orig.1 > 0); // Cannot disconnect genesis
 314                 let prev = node.blocks.lock().unwrap().last().unwrap().clone();
 315
 316                 match *node.connect_style.borrow() {
 317                         ConnectStyle::FullBlockViaListen => {
 318                                 node.chain_monitor.chain_monitor.block_disconnected(&orig.0.header, orig.1);
 319                                 Listen::block_disconnected(node.node, &orig.0.header, orig.1);
 320                         },
 321                         ConnectStyle::BestBlockFirstSkippingBlocks|ConnectStyle::TransactionsFirstSkippingBlocks|
 322                         ConnectStyle::HighlyRedundantTransactionsFirstSkippingBlocks|ConnectStyle::TransactionsDuplicativelyFirstSkippingBlocks => {
 323                                 if i == count - 1 {
 324                                         node.chain_monitor.chain_monitor.best_block_updated(&prev.0.header, prev.1);
 325                                         node.node.best_block_updated(&prev.0.header, prev.1);
 326                                 }
 327                         },
 328                         ConnectStyle::BestBlockFirstReorgsOnlyTip|ConnectStyle::TransactionsFirstReorgsOnlyTip => {
 329                                 for tx in orig.0.txdata {
 330                                         node.chain_monitor.chain_monitor.transaction_unconfirmed(&tx.txid());
 331                                         node.node.transaction_unconfirmed(&tx.txid());
 332                                 }
 333                         },
 334                         _ => {
 335                                 node.chain_monitor.chain_monitor.best_block_updated(&prev.0.header, prev.1);
 336                                 node.node.best_block_updated(&prev.0.header, prev.1);
 337                         },
 338                 }
 339                 call_claimable_balances(node);
 340         }
 341 }
 342
 343 pub fn disconnect_all_blocks<'a, 'b, 'c, 'd>(node: &'a Node<'b, 'c, 'd>) {
 344         let count = node.blocks.lock().unwrap().len() as u32 - 1;
 345         disconnect_blocks(node, count);
 346 }
 347
 348 pub struct TestChanMonCfg {
 349         pub tx_broadcaster: test_utils::TestBroadcaster,
 350         pub fee_estimator: test_utils::TestFeeEstimator,
 351         pub chain_source: test_utils::TestChainSource,
 352         pub persister: test_utils::TestPersister,
 353         pub logger: test_utils::TestLogger,
 354         pub keys_manager: test_utils::TestKeysInterface,
 355         pub scorer: RwLock<test_utils::TestScorer>,
 356 }
 357
 358 pub struct NodeCfg<'a> {
 359         pub chain_source: &'a test_utils::TestChainSource,
 360         pub tx_broadcaster: &'a test_utils::TestBroadcaster,
 361         pub fee_estimator: &'a test_utils::TestFeeEstimator,
 362         pub router: test_utils::TestRouter<'a>,
 363         pub chain_monitor: test_utils::TestChainMonitor<'a>,
 364         pub keys_manager: &'a test_utils::TestKeysInterface,
 365         pub logger: &'a test_utils::TestLogger,
 366         pub network_graph: Arc<NetworkGraph<&'a test_utils::TestLogger>>,
 367         pub node_seed: [u8; 32],
 368         pub override_init_features: Rc<RefCell<Option<InitFeatures>>>,
 369 }
 370
 371 type TestChannelManager<'node_cfg, 'chan_mon_cfg> = ChannelManager<
 372         &'node_cfg TestChainMonitor<'chan_mon_cfg>,
 373         &'chan_mon_cfg test_utils::TestBroadcaster,
 374         &'node_cfg test_utils::TestKeysInterface,
 375         &'node_cfg test_utils::TestKeysInterface,
 376         &'node_cfg test_utils::TestKeysInterface,
 377         &'chan_mon_cfg test_utils::TestFeeEstimator,
 378         &'node_cfg test_utils::TestRouter<'chan_mon_cfg>,
 379         &'chan_mon_cfg test_utils::TestLogger,
 380 >;
 381
 382 pub struct Node<'chan_man, 'node_cfg: 'chan_man, 'chan_mon_cfg: 'node_cfg> {
 383         pub chain_source: &'chan_mon_cfg test_utils::TestChainSource,
 384         pub tx_broadcaster: &'chan_mon_cfg test_utils::TestBroadcaster,
 385         pub fee_estimator: &'chan_mon_cfg test_utils::TestFeeEstimator,
 386         pub router: &'node_cfg test_utils::TestRouter<'chan_mon_cfg>,
 387         pub chain_monitor: &'node_cfg test_utils::TestChainMonitor<'chan_mon_cfg>,
 388         pub keys_manager: &'chan_mon_cfg test_utils::TestKeysInterface,
 389         pub node: &'chan_man TestChannelManager<'node_cfg, 'chan_mon_cfg>,
 390         pub network_graph: &'node_cfg NetworkGraph<&'chan_mon_cfg test_utils::TestLogger>,
 391         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>,
 392         pub node_seed: [u8; 32],
 393         pub network_payment_count: Rc<RefCell<u8>>,
 394         pub network_chan_count: Rc<RefCell<u32>>,
 395         pub logger: &'chan_mon_cfg test_utils::TestLogger,
 396         pub blocks: Arc<Mutex<Vec<(Block, u32)>>>,
 397         pub connect_style: Rc<RefCell<ConnectStyle>>,
 398         pub override_init_features: Rc<RefCell<Option<InitFeatures>>>,
 399         pub wallet_source: Arc<test_utils::TestWalletSource>,
 400         pub bump_tx_handler: BumpTransactionEventHandler<
 401                 &'chan_mon_cfg test_utils::TestBroadcaster,
 402                 Arc<Wallet<Arc<test_utils::TestWalletSource>, &'chan_mon_cfg test_utils::TestLogger>>,
 403                 &'chan_mon_cfg test_utils::TestKeysInterface,
 404                 &'chan_mon_cfg test_utils::TestLogger,
 405         >,
 406 }
 407 impl<'a, 'b, 'c> Node<'a, 'b, 'c> {
 408         pub fn best_block_hash(&self) -> BlockHash {
 409                 self.blocks.lock().unwrap().last().unwrap().0.block_hash()
 410         }
 411         pub fn best_block_info(&self) -> (BlockHash, u32) {
 412                 self.blocks.lock().unwrap().last().map(|(a, b)| (a.block_hash(), *b)).unwrap()
 413         }
 414         pub fn get_block_header(&self, height: u32) -> BlockHeader {
 415                 self.blocks.lock().unwrap()[height as usize].0.header
 416         }
 417 }
 418
 419 /// If we need an unsafe pointer to a `Node` (ie to reference it in a thread
 420 /// pre-std::thread::scope), this provides that with `Sync`. Note that accessing some of the fields
 421 /// in the `Node` are not safe to use (i.e. the ones behind an `Rc`), but that's left to the caller
 422 /// to figure out.
 423 pub struct NodePtr(pub *const Node<'static, 'static, 'static>);
 424 impl NodePtr {
 425         pub fn from_node<'a, 'b: 'a, 'c: 'b>(node: &Node<'a, 'b, 'c>) -> Self {
 426                 Self((node as *const Node<'a, 'b, 'c>).cast())
 427         }
 428 }
 429 unsafe impl Send for NodePtr {}
 430 unsafe impl Sync for NodePtr {}
 431
 432
 433 pub trait NodeHolder {
 434         type CM: AChannelManager;
 435         fn node(&self) -> &ChannelManager<
 436                 <Self::CM as AChannelManager>::M,
 437                 <Self::CM as AChannelManager>::T,
 438                 <Self::CM as AChannelManager>::ES,
 439                 <Self::CM as AChannelManager>::NS,
 440                 <Self::CM as AChannelManager>::SP,
 441                 <Self::CM as AChannelManager>::F,
 442                 <Self::CM as AChannelManager>::R,
 443                 <Self::CM as AChannelManager>::L>;
 444         fn chain_monitor(&self) -> Option<&test_utils::TestChainMonitor>;
 445 }
 446 impl<H: NodeHolder> NodeHolder for &H {
 447         type CM = H::CM;
 448         fn node(&self) -> &ChannelManager<
 449                 <Self::CM as AChannelManager>::M,
 450                 <Self::CM as AChannelManager>::T,
 451                 <Self::CM as AChannelManager>::ES,
 452                 <Self::CM as AChannelManager>::NS,
 453                 <Self::CM as AChannelManager>::SP,
 454                 <Self::CM as AChannelManager>::F,
 455                 <Self::CM as AChannelManager>::R,
 456                 <Self::CM as AChannelManager>::L> { (*self).node() }
 457         fn chain_monitor(&self) -> Option<&test_utils::TestChainMonitor> { (*self).chain_monitor() }
 458 }
 459 impl<'a, 'b: 'a, 'c: 'b> NodeHolder for Node<'a, 'b, 'c> {
 460         type CM = TestChannelManager<'b, 'c>;
 461         fn node(&self) -> &TestChannelManager<'b, 'c> { &self.node }
 462         fn chain_monitor(&self) -> Option<&test_utils::TestChainMonitor> { Some(self.chain_monitor) }
 463 }
 464
 465 impl<'a, 'b, 'c> Drop for Node<'a, 'b, 'c> {
 466         fn drop(&mut self) {
 467                 if !panicking() {
 468                         // Check that we processed all pending events
 469                         let msg_events = self.node.get_and_clear_pending_msg_events();
 470                         if !msg_events.is_empty() {
 471                                 panic!("Had excess message events on node {}: {:?}", self.logger.id, msg_events);
 472                         }
 473                         let events = self.node.get_and_clear_pending_events();
 474                         if !events.is_empty() {
 475                                 panic!("Had excess events on node {}: {:?}", self.logger.id, events);
 476                         }
 477                         let added_monitors = self.chain_monitor.added_monitors.lock().unwrap().split_off(0);
 478                         if !added_monitors.is_empty() {
 479                                 panic!("Had {} excess added monitors on node {}", added_monitors.len(), self.logger.id);
 480                         }
 481
 482                         // Check that if we serialize the network graph, we can deserialize it again.
 483                         let network_graph = {
 484                                 let mut w = test_utils::TestVecWriter(Vec::new());
 485                                 self.network_graph.write(&mut w).unwrap();
 486                                 let network_graph_deser = <NetworkGraph<_>>::read(&mut io::Cursor::new(&w.0), self.logger).unwrap();
 487                                 assert!(network_graph_deser == *self.network_graph);
 488                                 let gossip_sync = P2PGossipSync::new(
 489                                         &network_graph_deser, Some(self.chain_source), self.logger
 490                                 );
 491                                 let mut chan_progress = 0;
 492                                 loop {
 493                                         let orig_announcements = self.gossip_sync.get_next_channel_announcement(chan_progress);
 494                                         let deserialized_announcements = gossip_sync.get_next_channel_announcement(chan_progress);
 495                                         assert!(orig_announcements == deserialized_announcements);
 496                                         chan_progress = match orig_announcements {
 497                                                 Some(announcement) => announcement.0.contents.short_channel_id + 1,
 498                                                 None => break,
 499                                         };
 500                                 }
 501                                 let mut node_progress = None;
 502                                 loop {
 503                                         let orig_announcements = self.gossip_sync.get_next_node_announcement(node_progress.as_ref());
 504                                         let deserialized_announcements = gossip_sync.get_next_node_announcement(node_progress.as_ref());
 505                                         assert!(orig_announcements == deserialized_announcements);
 506                                         node_progress = match orig_announcements {
 507                                                 Some(announcement) => Some(announcement.contents.node_id),
 508                                                 None => break,
 509                                         };
 510                                 }
 511                                 network_graph_deser
 512                         };
 513
 514                         // Check that if we serialize and then deserialize all our channel monitors we get the
 515                         // same set of outputs to watch for on chain as we have now. Note that if we write
 516                         // tests that fully close channels and remove the monitors at some point this may break.
 517                         let feeest = test_utils::TestFeeEstimator { sat_per_kw: Mutex::new(253) };
 518                         let mut deserialized_monitors = Vec::new();
 519                         {
 520                                 for outpoint in self.chain_monitor.chain_monitor.list_monitors() {
 521                                         let mut w = test_utils::TestVecWriter(Vec::new());
 522                                         self.chain_monitor.chain_monitor.get_monitor(outpoint).unwrap().write(&mut w).unwrap();
 523                                         let (_, deserialized_monitor) = <(BlockHash, ChannelMonitor<TestChannelSigner>)>::read(
 524                                                 &mut io::Cursor::new(&w.0), (self.keys_manager, self.keys_manager)).unwrap();
 525                                         deserialized_monitors.push(deserialized_monitor);
 526                                 }
 527                         }
 528
 529                         let broadcaster = test_utils::TestBroadcaster {
 530                                 txn_broadcasted: Mutex::new(self.tx_broadcaster.txn_broadcasted.lock().unwrap().clone()),
 531                                 blocks: Arc::new(Mutex::new(self.tx_broadcaster.blocks.lock().unwrap().clone())),
 532                         };
 533
 534                         // Before using all the new monitors to check the watch outpoints, use the full set of
 535                         // them to ensure we can write and reload our ChannelManager.
 536                         {
 537                                 let mut channel_monitors = HashMap::new();
 538                                 for monitor in deserialized_monitors.iter_mut() {
 539                                         channel_monitors.insert(monitor.get_funding_txo().0, monitor);
 540                                 }
 541
 542                                 let scorer = RwLock::new(test_utils::TestScorer::new());
 543                                 let mut w = test_utils::TestVecWriter(Vec::new());
 544                                 self.node.write(&mut w).unwrap();
 545                                 <(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 {
 546                                         default_config: *self.node.get_current_default_configuration(),
 547                                         entropy_source: self.keys_manager,
 548                                         node_signer: self.keys_manager,
 549                                         signer_provider: self.keys_manager,
 550                                         fee_estimator: &test_utils::TestFeeEstimator { sat_per_kw: Mutex::new(253) },
 551                                         router: &test_utils::TestRouter::new(Arc::new(network_graph), &scorer),
 552                                         chain_monitor: self.chain_monitor,
 553                                         tx_broadcaster: &broadcaster,
 554                                         logger: &self.logger,
 555                                         channel_monitors,
 556                                 }).unwrap();
 557                         }
 558
 559                         let persister = test_utils::TestPersister::new();
 560                         let chain_source = test_utils::TestChainSource::new(Network::Testnet);
 561                         let chain_monitor = test_utils::TestChainMonitor::new(Some(&chain_source), &broadcaster, &self.logger, &feeest, &persister, &self.keys_manager);
 562                         for deserialized_monitor in deserialized_monitors.drain(..) {
 563                                 if chain_monitor.watch_channel(deserialized_monitor.get_funding_txo().0, deserialized_monitor) != ChannelMonitorUpdateStatus::Completed {
 564                                         panic!();
 565                                 }
 566                         }
 567                         assert_eq!(*chain_source.watched_txn.unsafe_well_ordered_double_lock_self(), *self.chain_source.watched_txn.unsafe_well_ordered_double_lock_self());
 568                         assert_eq!(*chain_source.watched_outputs.unsafe_well_ordered_double_lock_self(), *self.chain_source.watched_outputs.unsafe_well_ordered_double_lock_self());
 569                 }
 570         }
 571 }
 572
 573 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) {
 574         create_chan_between_nodes_with_value(node_a, node_b, 100000, 10001)
 575 }
 576
 577 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) {
 578         let (channel_ready, channel_id, tx) = create_chan_between_nodes_with_value_a(node_a, node_b, channel_value, push_msat);
 579         let (announcement, as_update, bs_update) = create_chan_between_nodes_with_value_b(node_a, node_b, &channel_ready);
 580         (announcement, as_update, bs_update, channel_id, tx)
 581 }
 582
 583 /// Gets an RAA and CS which were sent in response to a commitment update
 584 pub fn get_revoke_commit_msgs<CM: AChannelManager, H: NodeHolder<CM=CM>>(node: &H, recipient: &PublicKey) -> (msgs::RevokeAndACK, msgs::CommitmentSigned) {
 585         let events = node.node().get_and_clear_pending_msg_events();
 586         assert_eq!(events.len(), 2);
 587         (match events[0] {
 588                 MessageSendEvent::SendRevokeAndACK { ref node_id, ref msg } => {
 589                         assert_eq!(node_id, recipient);
 590                         (*msg).clone()
 591                 },
 592                 _ => panic!("Unexpected event"),
 593         }, match events[1] {
 594                 MessageSendEvent::UpdateHTLCs { ref node_id, ref updates } => {
 595                         assert_eq!(node_id, recipient);
 596                         assert!(updates.update_add_htlcs.is_empty());
 597                         assert!(updates.update_fulfill_htlcs.is_empty());
 598                         assert!(updates.update_fail_htlcs.is_empty());
 599                         assert!(updates.update_fail_malformed_htlcs.is_empty());
 600                         assert!(updates.update_fee.is_none());
 601                         updates.commitment_signed.clone()
 602                 },
 603                 _ => panic!("Unexpected event"),
 604         })
 605 }
 606
 607 #[macro_export]
 608 /// Gets an RAA and CS which were sent in response to a commitment update
 609 ///
 610 /// Don't use this, use the identically-named function instead.
 611 macro_rules! get_revoke_commit_msgs {
 612         ($node: expr, $node_id: expr) => {
 613                 $crate::ln::functional_test_utils::get_revoke_commit_msgs(&$node, &$node_id)
 614         }
 615 }
 616
 617 /// Get an specific event message from the pending events queue.
 618 #[macro_export]
 619 macro_rules! get_event_msg {
 620         ($node: expr, $event_type: path, $node_id: expr) => {
 621                 {
 622                         let events = $node.node.get_and_clear_pending_msg_events();
 623                         assert_eq!(events.len(), 1);
 624                         match events[0] {
 625                                 $event_type { ref node_id, ref msg } => {
 626                                         assert_eq!(*node_id, $node_id);
 627                                         (*msg).clone()
 628                                 },
 629                                 _ => panic!("Unexpected event"),
 630                         }
 631                 }
 632         }
 633 }
 634
 635 /// Get an error message from the pending events queue.
 636 pub fn get_err_msg(node: &Node, recipient: &PublicKey) -> msgs::ErrorMessage {
 637         let events = node.node.get_and_clear_pending_msg_events();
 638         assert_eq!(events.len(), 1);
 639         match events[0] {
 640                 MessageSendEvent::HandleError {
 641                         action: msgs::ErrorAction::SendErrorMessage { ref msg }, ref node_id
 642                 } => {
 643                         assert_eq!(node_id, recipient);
 644                         (*msg).clone()
 645                 },
 646                 _ => panic!("Unexpected event"),
 647         }
 648 }
 649
 650 /// Get a specific event from the pending events queue.
 651 #[macro_export]
 652 macro_rules! get_event {
 653         ($node: expr, $event_type: path) => {
 654                 {
 655                         let mut events = $node.node.get_and_clear_pending_events();
 656                         assert_eq!(events.len(), 1);
 657                         let ev = events.pop().unwrap();
 658                         match ev {
 659                                 $event_type { .. } => {
 660                                         ev
 661                                 },
 662                                 _ => panic!("Unexpected event"),
 663                         }
 664                 }
 665         }
 666 }
 667
 668 /// Gets an UpdateHTLCs MessageSendEvent
 669 pub fn get_htlc_update_msgs(node: &Node, recipient: &PublicKey) -> msgs::CommitmentUpdate {
 670         let events = node.node.get_and_clear_pending_msg_events();
 671         assert_eq!(events.len(), 1);
 672         match events[0] {
 673                 MessageSendEvent::UpdateHTLCs { ref node_id, ref updates } => {
 674                         assert_eq!(node_id, recipient);
 675                         (*updates).clone()
 676                 },
 677                 _ => panic!("Unexpected event"),
 678         }
 679 }
 680
 681 #[macro_export]
 682 /// Gets an UpdateHTLCs MessageSendEvent
 683 ///
 684 /// Don't use this, use the identically-named function instead.
 685 macro_rules! get_htlc_update_msgs {
 686         ($node: expr, $node_id: expr) => {
 687                 $crate::ln::functional_test_utils::get_htlc_update_msgs(&$node, &$node_id)
 688         }
 689 }
 690
 691 /// Fetches the first `msg_event` to the passed `node_id` in the passed `msg_events` vec.
 692 /// Returns the `msg_event`.
 693 ///
 694 /// Note that even though `BroadcastChannelAnnouncement` and `BroadcastChannelUpdate`
 695 /// `msg_events` are stored under specific peers, this function does not fetch such `msg_events` as
 696 /// such messages are intended to all peers.
 697 pub fn remove_first_msg_event_to_node(msg_node_id: &PublicKey, msg_events: &mut Vec<MessageSendEvent>) -> MessageSendEvent {
 698         let ev_index = msg_events.iter().position(|e| { match e {
 699                 MessageSendEvent::SendAcceptChannel { node_id, .. } => {
 700                         node_id == msg_node_id
 701                 },
 702                 MessageSendEvent::SendOpenChannel { node_id, .. } => {
 703                         node_id == msg_node_id
 704                 },
 705                 MessageSendEvent::SendFundingCreated { node_id, .. } => {
 706                         node_id == msg_node_id
 707                 },
 708                 MessageSendEvent::SendFundingSigned { node_id, .. } => {
 709                         node_id == msg_node_id
 710                 },
 711                 MessageSendEvent::SendChannelReady { node_id, .. } => {
 712                         node_id == msg_node_id
 713                 },
 714                 MessageSendEvent::SendAnnouncementSignatures { node_id, .. } => {
 715                         node_id == msg_node_id
 716                 },
 717                 MessageSendEvent::UpdateHTLCs { node_id, .. } => {
 718                         node_id == msg_node_id
 719                 },
 720                 MessageSendEvent::SendRevokeAndACK { node_id, .. } => {
 721                         node_id == msg_node_id
 722                 },
 723                 MessageSendEvent::SendClosingSigned { node_id, .. } => {
 724                         node_id == msg_node_id
 725                 },
 726                 MessageSendEvent::SendShutdown { node_id, .. } => {
 727                         node_id == msg_node_id
 728                 },
 729                 MessageSendEvent::SendChannelReestablish { node_id, .. } => {
 730                         node_id == msg_node_id
 731                 },
 732                 MessageSendEvent::SendChannelAnnouncement { node_id, .. } => {
 733                         node_id == msg_node_id
 734                 },
 735                 MessageSendEvent::BroadcastChannelAnnouncement { .. } => {
 736                         false
 737                 },
 738                 MessageSendEvent::BroadcastChannelUpdate { .. } => {
 739                         false
 740                 },
 741                 MessageSendEvent::BroadcastNodeAnnouncement { .. } => {
 742                         false
 743                 },
 744                 MessageSendEvent::SendChannelUpdate { node_id, .. } => {
 745                         node_id == msg_node_id
 746                 },
 747                 MessageSendEvent::HandleError { node_id, .. } => {
 748                         node_id == msg_node_id
 749                 },
 750                 MessageSendEvent::SendChannelRangeQuery { node_id, .. } => {
 751                         node_id == msg_node_id
 752                 },
 753                 MessageSendEvent::SendShortIdsQuery { node_id, .. } => {
 754                         node_id == msg_node_id
 755                 },
 756                 MessageSendEvent::SendReplyChannelRange { node_id, .. } => {
 757                         node_id == msg_node_id
 758                 },
 759                 MessageSendEvent::SendGossipTimestampFilter { node_id, .. } => {
 760                         node_id == msg_node_id
 761                 },
 762                 MessageSendEvent::SendAcceptChannelV2 { node_id, .. } => {
 763                         node_id == msg_node_id
 764                 },
 765                 MessageSendEvent::SendOpenChannelV2 { node_id, .. } => {
 766                         node_id == msg_node_id
 767                 },
 768                 MessageSendEvent::SendTxAddInput { node_id, .. } => {
 769                         node_id == msg_node_id
 770                 },
 771                 MessageSendEvent::SendTxAddOutput { node_id, .. } => {
 772                         node_id == msg_node_id
 773                 },
 774                 MessageSendEvent::SendTxRemoveInput { node_id, .. } => {
 775                         node_id == msg_node_id
 776                 },
 777                 MessageSendEvent::SendTxRemoveOutput { node_id, .. } => {
 778                         node_id == msg_node_id
 779                 },
 780                 MessageSendEvent::SendTxComplete { node_id, .. } => {
 781                         node_id == msg_node_id
 782                 },
 783                 MessageSendEvent::SendTxSignatures { node_id, .. } => {
 784                         node_id == msg_node_id
 785                 },
 786                 MessageSendEvent::SendTxInitRbf { node_id, .. } => {
 787                         node_id == msg_node_id
 788                 },
 789                 MessageSendEvent::SendTxAckRbf { node_id, .. } => {
 790                         node_id == msg_node_id
 791                 },
 792                 MessageSendEvent::SendTxAbort { node_id, .. } => {
 793                         node_id == msg_node_id
 794                 },
 795         }});
 796         if ev_index.is_some() {
 797                 msg_events.remove(ev_index.unwrap())
 798         } else {
 799                 panic!("Couldn't find any MessageSendEvent to the node!")
 800         }
 801 }
 802
 803 #[cfg(test)]
 804 macro_rules! get_channel_ref {
 805         ($node: expr, $counterparty_node: expr, $per_peer_state_lock: ident, $peer_state_lock: ident, $channel_id: expr) => {
 806                 {
 807                         $per_peer_state_lock = $node.node.per_peer_state.read().unwrap();
 808                         $peer_state_lock = $per_peer_state_lock.get(&$counterparty_node.node.get_our_node_id()).unwrap().lock().unwrap();
 809                         $peer_state_lock.channel_by_id.get_mut(&$channel_id).unwrap()
 810                 }
 811         }
 812 }
 813
 814 #[cfg(test)]
 815 macro_rules! get_feerate {
 816         ($node: expr, $counterparty_node: expr, $channel_id: expr) => {
 817                 {
 818                         let mut per_peer_state_lock;
 819                         let mut peer_state_lock;
 820                         let phase = get_channel_ref!($node, $counterparty_node, per_peer_state_lock, peer_state_lock, $channel_id);
 821                         phase.context().get_feerate_sat_per_1000_weight()
 822                 }
 823         }
 824 }
 825
 826 #[cfg(test)]
 827 macro_rules! get_channel_type_features {
 828         ($node: expr, $counterparty_node: expr, $channel_id: expr) => {
 829                 {
 830                         let mut per_peer_state_lock;
 831                         let mut peer_state_lock;
 832                         let chan = get_channel_ref!($node, $counterparty_node, per_peer_state_lock, peer_state_lock, $channel_id);
 833                         chan.context().get_channel_type().clone()
 834                 }
 835         }
 836 }
 837
 838 /// Returns a channel monitor given a channel id, making some naive assumptions
 839 #[macro_export]
 840 macro_rules! get_monitor {
 841         ($node: expr, $channel_id: expr) => {
 842                 {
 843                         use bitcoin::hashes::Hash;
 844                         let mut monitor = None;
 845                         // Assume funding vout is either 0 or 1 blindly
 846                         for index in 0..2 {
 847                                 if let Ok(mon) = $node.chain_monitor.chain_monitor.get_monitor(
 848                                         $crate::chain::transaction::OutPoint {
 849                                                 txid: bitcoin::Txid::from_slice(&$channel_id.0[..]).unwrap(), index
 850                                         })
 851                                 {
 852                                         monitor = Some(mon);
 853                                         break;
 854                                 }
 855                         }
 856                         monitor.unwrap()
 857                 }
 858         }
 859 }
 860
 861 /// Returns any local commitment transactions for the channel.
 862 #[macro_export]
 863 macro_rules! get_local_commitment_txn {
 864         ($node: expr, $channel_id: expr) => {
 865                 {
 866                         $crate::get_monitor!($node, $channel_id).unsafe_get_latest_holder_commitment_txn(&$node.logger)
 867                 }
 868         }
 869 }
 870
 871 /// Check the error from attempting a payment.
 872 #[macro_export]
 873 macro_rules! unwrap_send_err {
 874         ($res: expr, $all_failed: expr, $type: pat, $check: expr) => {
 875                 match &$res {
 876                         &Err(PaymentSendFailure::AllFailedResendSafe(ref fails)) if $all_failed => {
 877                                 assert_eq!(fails.len(), 1);
 878                                 match fails[0] {
 879                                         $type => { $check },
 880                                         _ => panic!(),
 881                                 }
 882                         },
 883                         &Err(PaymentSendFailure::PartialFailure { ref results, .. }) if !$all_failed => {
 884                                 assert_eq!(results.len(), 1);
 885                                 match results[0] {
 886                                         Err($type) => { $check },
 887                                         _ => panic!(),
 888                                 }
 889                         },
 890                         _ => panic!(),
 891                 }
 892         }
 893 }
 894
 895 /// Check whether N channel monitor(s) have been added.
 896 pub fn check_added_monitors<CM: AChannelManager, H: NodeHolder<CM=CM>>(node: &H, count: usize) {
 897         if let Some(chain_monitor) = node.chain_monitor() {
 898                 let mut added_monitors = chain_monitor.added_monitors.lock().unwrap();
 899                 assert_eq!(added_monitors.len(), count);
 900                 added_monitors.clear();
 901         }
 902 }
 903
 904 /// Check whether N channel monitor(s) have been added.
 905 ///
 906 /// Don't use this, use the identically-named function instead.
 907 #[macro_export]
 908 macro_rules! check_added_monitors {
 909         ($node: expr, $count: expr) => {
 910                 $crate::ln::functional_test_utils::check_added_monitors(&$node, $count);
 911         }
 912 }
 913
 914 /// Checks whether the claimed HTLC for the specified path has the correct channel information.
 915 ///
 916 /// This will panic if the path is empty, if the HTLC's channel ID is not actually a channel that
 917 /// connects the final two nodes in the path, or if the `user_channel_id` is incorrect.
 918 pub fn check_claimed_htlc_channel<'a, 'b, 'c>(origin_node: &Node<'a, 'b, 'c>, path: &[&Node<'a, 'b, 'c>], htlc: &ClaimedHTLC) {
 919         let mut nodes = path.iter().rev();
 920         let dest = nodes.next().expect("path should have a destination").node;
 921         let prev = nodes.next().unwrap_or(&origin_node).node;
 922         let dest_channels = dest.list_channels();
 923         let ch = dest_channels.iter().find(|ch| ch.channel_id == htlc.channel_id)
 924                 .expect("HTLC's channel should be one of destination node's channels");
 925         assert_eq!(htlc.user_channel_id, ch.user_channel_id);
 926         assert_eq!(ch.counterparty.node_id, prev.get_our_node_id());
 927 }
 928
 929 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> {
 930         let mut monitors_read = Vec::with_capacity(monitors_encoded.len());
 931         for encoded in monitors_encoded {
 932                 let mut monitor_read = &encoded[..];
 933                 let (_, monitor) = <(BlockHash, ChannelMonitor<TestChannelSigner>)>
 934                         ::read(&mut monitor_read, (node.keys_manager, node.keys_manager)).unwrap();
 935                 assert!(monitor_read.is_empty());
 936                 monitors_read.push(monitor);
 937         }
 938
 939         let mut node_read = &chanman_encoded[..];
 940         let (_, node_deserialized) = {
 941                 let mut channel_monitors = HashMap::new();
 942                 for monitor in monitors_read.iter_mut() {
 943                         assert!(channel_monitors.insert(monitor.get_funding_txo().0, monitor).is_none());
 944                 }
 945                 <(BlockHash, TestChannelManager<'b, 'c>)>::read(&mut node_read, ChannelManagerReadArgs {
 946                         default_config,
 947                         entropy_source: node.keys_manager,
 948                         node_signer: node.keys_manager,
 949                         signer_provider: node.keys_manager,
 950                         fee_estimator: node.fee_estimator,
 951                         router: node.router,
 952                         chain_monitor: node.chain_monitor,
 953                         tx_broadcaster: node.tx_broadcaster,
 954                         logger: node.logger,
 955                         channel_monitors,
 956                 }).unwrap()
 957         };
 958         assert!(node_read.is_empty());
 959
 960         for monitor in monitors_read.drain(..) {
 961                 assert_eq!(node.chain_monitor.watch_channel(monitor.get_funding_txo().0, monitor),
 962                         ChannelMonitorUpdateStatus::Completed);
 963                 check_added_monitors!(node, 1);
 964         }
 965
 966         node_deserialized
 967 }
 968
 969 #[cfg(test)]
 970 macro_rules! reload_node {
 971         ($node: expr, $new_config: expr, $chanman_encoded: expr, $monitors_encoded: expr, $persister: ident, $new_chain_monitor: ident, $new_channelmanager: ident) => {
 972                 let chanman_encoded = $chanman_encoded;
 973
 974                 $persister = test_utils::TestPersister::new();
 975                 $new_chain_monitor = test_utils::TestChainMonitor::new(Some($node.chain_source), $node.tx_broadcaster.clone(), $node.logger, $node.fee_estimator, &$persister, &$node.keys_manager);
 976                 $node.chain_monitor = &$new_chain_monitor;
 977
 978                 $new_channelmanager = _reload_node(&$node, $new_config, &chanman_encoded, $monitors_encoded);
 979                 $node.node = &$new_channelmanager;
 980         };
 981         ($node: expr, $chanman_encoded: expr, $monitors_encoded: expr, $persister: ident, $new_chain_monitor: ident, $new_channelmanager: ident) => {
 982                 reload_node!($node, $crate::util::config::UserConfig::default(), $chanman_encoded, $monitors_encoded, $persister, $new_chain_monitor, $new_channelmanager);
 983         };
 984 }
 985
 986 pub fn create_funding_transaction<'a, 'b, 'c>(node: &Node<'a, 'b, 'c>,
 987         expected_counterparty_node_id: &PublicKey, expected_chan_value: u64, expected_user_chan_id: u128)
 988  -> (ChannelId, Transaction, OutPoint)
 989 {
 990         internal_create_funding_transaction(node, expected_counterparty_node_id, expected_chan_value, expected_user_chan_id, false)
 991 }
 992
 993 pub fn create_coinbase_funding_transaction<'a, 'b, 'c>(node: &Node<'a, 'b, 'c>,
 994         expected_counterparty_node_id: &PublicKey, expected_chan_value: u64, expected_user_chan_id: u128)
 995  -> (ChannelId, Transaction, OutPoint)
 996 {
 997         internal_create_funding_transaction(node, expected_counterparty_node_id, expected_chan_value, expected_user_chan_id, true)
 998 }
 999
1000 fn internal_create_funding_transaction<'a, 'b, 'c>(node: &Node<'a, 'b, 'c>,
1001         expected_counterparty_node_id: &PublicKey, expected_chan_value: u64, expected_user_chan_id: u128,
1002         coinbase: bool) -> (ChannelId, Transaction, OutPoint) {
1003         let chan_id = *node.network_chan_count.borrow();
1004
1005         let events = node.node.get_and_clear_pending_events();
1006         assert_eq!(events.len(), 1);
1007         match events[0] {
1008                 Event::FundingGenerationReady { ref temporary_channel_id, ref counterparty_node_id, ref channel_value_satoshis, ref output_script, user_channel_id } => {
1009                         assert_eq!(counterparty_node_id, expected_counterparty_node_id);
1010                         assert_eq!(*channel_value_satoshis, expected_chan_value);
1011                         assert_eq!(user_channel_id, expected_user_chan_id);
1012
1013                         let input = if coinbase {
1014                                 vec![TxIn {
1015                                         previous_output: bitcoin::OutPoint::null(),
1016                                         ..Default::default()
1017                                 }]
1018                         } else {
1019                                 Vec::new()
1020                         };
1021
1022                         let tx = Transaction { version: chan_id as i32, lock_time: PackedLockTime::ZERO, input, output: vec![TxOut {
1023                                 value: *channel_value_satoshis, script_pubkey: output_script.clone(),
1024                         }]};
1025                         let funding_outpoint = OutPoint { txid: tx.txid(), index: 0 };
1026                         (*temporary_channel_id, tx, funding_outpoint)
1027                 },
1028                 _ => panic!("Unexpected event"),
1029         }
1030 }
1031
1032 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 {
1033         let (temporary_channel_id, tx, funding_output) = create_funding_transaction(node_a, &node_b.node.get_our_node_id(), channel_value, 42);
1034         assert_eq!(temporary_channel_id, expected_temporary_channel_id);
1035
1036         assert!(node_a.node.funding_transaction_generated(&temporary_channel_id, &node_b.node.get_our_node_id(), tx.clone()).is_ok());
1037         check_added_monitors!(node_a, 0);
1038
1039         let funding_created_msg = get_event_msg!(node_a, MessageSendEvent::SendFundingCreated, node_b.node.get_our_node_id());
1040         assert_eq!(funding_created_msg.temporary_channel_id, expected_temporary_channel_id);
1041         node_b.node.handle_funding_created(&node_a.node.get_our_node_id(), &funding_created_msg);
1042         {
1043                 let mut added_monitors = node_b.chain_monitor.added_monitors.lock().unwrap();
1044                 assert_eq!(added_monitors.len(), 1);
1045                 assert_eq!(added_monitors[0].0, funding_output);
1046                 added_monitors.clear();
1047         }
1048         expect_channel_pending_event(&node_b, &node_a.node.get_our_node_id());
1049
1050         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()));
1051         {
1052                 let mut added_monitors = node_a.chain_monitor.added_monitors.lock().unwrap();
1053                 assert_eq!(added_monitors.len(), 1);
1054                 assert_eq!(added_monitors[0].0, funding_output);
1055                 added_monitors.clear();
1056         }
1057         expect_channel_pending_event(&node_a, &node_b.node.get_our_node_id());
1058
1059         let events_4 = node_a.node.get_and_clear_pending_events();
1060         assert_eq!(events_4.len(), 0);
1061
1062         assert_eq!(node_a.tx_broadcaster.txn_broadcasted.lock().unwrap().len(), 1);
1063         assert_eq!(node_a.tx_broadcaster.txn_broadcasted.lock().unwrap()[0], tx);
1064         node_a.tx_broadcaster.txn_broadcasted.lock().unwrap().clear();
1065
1066         // Ensure that funding_transaction_generated is idempotent.
1067         assert!(node_a.node.funding_transaction_generated(&temporary_channel_id, &node_b.node.get_our_node_id(), tx.clone()).is_err());
1068         assert!(node_a.node.get_and_clear_pending_msg_events().is_empty());
1069         check_added_monitors!(node_a, 0);
1070
1071         tx
1072 }
1073
1074 // Receiver must have been initialized with manually_accept_inbound_channels set to true.
1075 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) {
1076         let initiator_channels = initiator.node.list_usable_channels().len();
1077         let receiver_channels = receiver.node.list_usable_channels().len();
1078
1079         initiator.node.create_channel(receiver.node.get_our_node_id(), 100_000, 10_001, 42, initiator_config).unwrap();
1080         let open_channel = get_event_msg!(initiator, MessageSendEvent::SendOpenChannel, receiver.node.get_our_node_id());
1081
1082         receiver.node.handle_open_channel(&initiator.node.get_our_node_id(), &open_channel);
1083         let events = receiver.node.get_and_clear_pending_events();
1084         assert_eq!(events.len(), 1);
1085         match events[0] {
1086                 Event::OpenChannelRequest { temporary_channel_id, .. } => {
1087                         receiver.node.accept_inbound_channel_from_trusted_peer_0conf(&temporary_channel_id, &initiator.node.get_our_node_id(), 0).unwrap();
1088                 },
1089                 _ => panic!("Unexpected event"),
1090         };
1091
1092         let accept_channel = get_event_msg!(receiver, MessageSendEvent::SendAcceptChannel, initiator.node.get_our_node_id());
1093         assert_eq!(accept_channel.minimum_depth, 0);
1094         initiator.node.handle_accept_channel(&receiver.node.get_our_node_id(), &accept_channel);
1095
1096         let (temporary_channel_id, tx, _) = create_funding_transaction(&initiator, &receiver.node.get_our_node_id(), 100_000, 42);
1097         initiator.node.funding_transaction_generated(&temporary_channel_id, &receiver.node.get_our_node_id(), tx.clone()).unwrap();
1098         let funding_created = get_event_msg!(initiator, MessageSendEvent::SendFundingCreated, receiver.node.get_our_node_id());
1099
1100         receiver.node.handle_funding_created(&initiator.node.get_our_node_id(), &funding_created);
1101         check_added_monitors!(receiver, 1);
1102         let bs_signed_locked = receiver.node.get_and_clear_pending_msg_events();
1103         assert_eq!(bs_signed_locked.len(), 2);
1104         let as_channel_ready;
1105         match &bs_signed_locked[0] {
1106                 MessageSendEvent::SendFundingSigned { node_id, msg } => {
1107                         assert_eq!(*node_id, initiator.node.get_our_node_id());
1108                         initiator.node.handle_funding_signed(&receiver.node.get_our_node_id(), &msg);
1109                         expect_channel_pending_event(&initiator, &receiver.node.get_our_node_id());
1110                         expect_channel_pending_event(&receiver, &initiator.node.get_our_node_id());
1111                         check_added_monitors!(initiator, 1);
1112
1113                         assert_eq!(initiator.tx_broadcaster.txn_broadcasted.lock().unwrap().len(), 1);
1114                         assert_eq!(initiator.tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0)[0], tx);
1115
1116                         as_channel_ready = get_event_msg!(initiator, MessageSendEvent::SendChannelReady, receiver.node.get_our_node_id());
1117                 }
1118                 _ => panic!("Unexpected event"),
1119         }
1120         match &bs_signed_locked[1] {
1121                 MessageSendEvent::SendChannelReady { node_id, msg } => {
1122                         assert_eq!(*node_id, initiator.node.get_our_node_id());
1123                         initiator.node.handle_channel_ready(&receiver.node.get_our_node_id(), &msg);
1124                         expect_channel_ready_event(&initiator, &receiver.node.get_our_node_id());
1125                 }
1126                 _ => panic!("Unexpected event"),
1127         }
1128
1129         receiver.node.handle_channel_ready(&initiator.node.get_our_node_id(), &as_channel_ready);
1130         expect_channel_ready_event(&receiver, &initiator.node.get_our_node_id());
1131
1132         let as_channel_update = get_event_msg!(initiator, MessageSendEvent::SendChannelUpdate, receiver.node.get_our_node_id());
1133         let bs_channel_update = get_event_msg!(receiver, MessageSendEvent::SendChannelUpdate, initiator.node.get_our_node_id());
1134
1135         initiator.node.handle_channel_update(&receiver.node.get_our_node_id(), &bs_channel_update);
1136         receiver.node.handle_channel_update(&initiator.node.get_our_node_id(), &as_channel_update);
1137
1138         assert_eq!(initiator.node.list_usable_channels().len(), initiator_channels + 1);
1139         assert_eq!(receiver.node.list_usable_channels().len(), receiver_channels + 1);
1140
1141         (tx, as_channel_ready.channel_id)
1142 }
1143
1144 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 {
1145         let create_chan_id = node_a.node.create_channel(node_b.node.get_our_node_id(), channel_value, push_msat, 42, None).unwrap();
1146         let open_channel_msg = get_event_msg!(node_a, MessageSendEvent::SendOpenChannel, node_b.node.get_our_node_id());
1147         assert_eq!(open_channel_msg.temporary_channel_id, create_chan_id);
1148         assert_eq!(node_a.node.list_channels().iter().find(|channel| channel.channel_id == create_chan_id).unwrap().user_channel_id, 42);
1149         node_b.node.handle_open_channel(&node_a.node.get_our_node_id(), &open_channel_msg);
1150         if node_b.node.get_current_default_configuration().manually_accept_inbound_channels {
1151                 let events = node_b.node.get_and_clear_pending_events();
1152                 assert_eq!(events.len(), 1);
1153                 match &events[0] {
1154                         Event::OpenChannelRequest { temporary_channel_id, counterparty_node_id, .. } =>
1155                                 node_b.node.accept_inbound_channel(temporary_channel_id, counterparty_node_id, 42).unwrap(),
1156                         _ => panic!("Unexpected event"),
1157                 };
1158         }
1159         let accept_channel_msg = get_event_msg!(node_b, MessageSendEvent::SendAcceptChannel, node_a.node.get_our_node_id());
1160         assert_eq!(accept_channel_msg.temporary_channel_id, create_chan_id);
1161         node_a.node.handle_accept_channel(&node_b.node.get_our_node_id(), &accept_channel_msg);
1162         assert_ne!(node_b.node.list_channels().iter().find(|channel| channel.channel_id == create_chan_id).unwrap().user_channel_id, 0);
1163
1164         sign_funding_transaction(node_a, node_b, channel_value, create_chan_id)
1165 }
1166
1167 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) {
1168         confirm_transaction_at(node_conf, tx, conf_height);
1169         connect_blocks(node_conf, CHAN_CONFIRM_DEPTH - 1);
1170         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()));
1171 }
1172
1173 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) {
1174         let channel_id;
1175         let events_6 = node_conf.node.get_and_clear_pending_msg_events();
1176         assert_eq!(events_6.len(), 3);
1177         let announcement_sigs_idx = if let MessageSendEvent::SendChannelUpdate { ref node_id, msg: _ } = events_6[1] {
1178                 assert_eq!(*node_id, node_recv.node.get_our_node_id());
1179                 2
1180         } else if let MessageSendEvent::SendChannelUpdate { ref node_id, msg: _ } = events_6[2] {
1181                 assert_eq!(*node_id, node_recv.node.get_our_node_id());
1182                 1
1183         } else { panic!("Unexpected event: {:?}", events_6[1]); };
1184         ((match events_6[0] {
1185                 MessageSendEvent::SendChannelReady { ref node_id, ref msg } => {
1186                         channel_id = msg.channel_id.clone();
1187                         assert_eq!(*node_id, node_recv.node.get_our_node_id());
1188                         msg.clone()
1189                 },
1190                 _ => panic!("Unexpected event"),
1191         }, match events_6[announcement_sigs_idx] {
1192                 MessageSendEvent::SendAnnouncementSignatures { ref node_id, ref msg } => {
1193                         assert_eq!(*node_id, node_recv.node.get_our_node_id());
1194                         msg.clone()
1195                 },
1196                 _ => panic!("Unexpected event"),
1197         }), channel_id)
1198 }
1199
1200 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) {
1201         let conf_height = core::cmp::max(node_a.best_block_info().1 + 1, node_b.best_block_info().1 + 1);
1202         create_chan_between_nodes_with_value_confirm_first(node_a, node_b, tx, conf_height);
1203         confirm_transaction_at(node_a, tx, conf_height);
1204         connect_blocks(node_a, CHAN_CONFIRM_DEPTH - 1);
1205         expect_channel_ready_event(&node_a, &node_b.node.get_our_node_id());
1206         create_chan_between_nodes_with_value_confirm_second(node_b, node_a)
1207 }
1208
1209 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) {
1210         let tx = create_chan_between_nodes_with_value_init(node_a, node_b, channel_value, push_msat);
1211         let (msgs, chan_id) = create_chan_between_nodes_with_value_confirm(node_a, node_b, &tx);
1212         (msgs, chan_id, tx)
1213 }
1214
1215 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) {
1216         node_b.node.handle_channel_ready(&node_a.node.get_our_node_id(), &as_funding_msgs.0);
1217         let bs_announcement_sigs = get_event_msg!(node_b, MessageSendEvent::SendAnnouncementSignatures, node_a.node.get_our_node_id());
1218         node_b.node.handle_announcement_signatures(&node_a.node.get_our_node_id(), &as_funding_msgs.1);
1219
1220         let events_7 = node_b.node.get_and_clear_pending_msg_events();
1221         assert_eq!(events_7.len(), 1);
1222         let (announcement, bs_update) = match events_7[0] {
1223                 MessageSendEvent::BroadcastChannelAnnouncement { ref msg, ref update_msg } => {
1224                         (msg, update_msg.clone().unwrap())
1225                 },
1226                 _ => panic!("Unexpected event"),
1227         };
1228
1229         node_a.node.handle_announcement_signatures(&node_b.node.get_our_node_id(), &bs_announcement_sigs);
1230         let events_8 = node_a.node.get_and_clear_pending_msg_events();
1231         assert_eq!(events_8.len(), 1);
1232         let as_update = match events_8[0] {
1233                 MessageSendEvent::BroadcastChannelAnnouncement { ref msg, ref update_msg } => {
1234                         assert!(*announcement == *msg);
1235                         let update_msg = update_msg.clone().unwrap();
1236                         assert_eq!(update_msg.contents.short_channel_id, announcement.contents.short_channel_id);
1237                         assert_eq!(update_msg.contents.short_channel_id, bs_update.contents.short_channel_id);
1238                         update_msg
1239                 },
1240                 _ => panic!("Unexpected event"),
1241         };
1242
1243         *node_a.network_chan_count.borrow_mut() += 1;
1244
1245         expect_channel_ready_event(&node_b, &node_a.node.get_our_node_id());
1246         ((*announcement).clone(), as_update, bs_update)
1247 }
1248
1249 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) {
1250         create_announced_chan_between_nodes_with_value(nodes, a, b, 100000, 10001)
1251 }
1252
1253 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) {
1254         let chan_announcement = create_chan_between_nodes_with_value(&nodes[a], &nodes[b], channel_value, push_msat);
1255         update_nodes_with_chan_announce(nodes, a, b, &chan_announcement.0, &chan_announcement.1, &chan_announcement.2);
1256         (chan_announcement.1, chan_announcement.2, chan_announcement.3, chan_announcement.4)
1257 }
1258
1259 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) {
1260         let mut no_announce_cfg = test_default_channel_config();
1261         no_announce_cfg.channel_handshake_config.announced_channel = false;
1262         nodes[a].node.create_channel(nodes[b].node.get_our_node_id(), channel_value, push_msat, 42, Some(no_announce_cfg)).unwrap();
1263         let open_channel = get_event_msg!(nodes[a], MessageSendEvent::SendOpenChannel, nodes[b].node.get_our_node_id());
1264         nodes[b].node.handle_open_channel(&nodes[a].node.get_our_node_id(), &open_channel);
1265         let accept_channel = get_event_msg!(nodes[b], MessageSendEvent::SendAcceptChannel, nodes[a].node.get_our_node_id());
1266         nodes[a].node.handle_accept_channel(&nodes[b].node.get_our_node_id(), &accept_channel);
1267
1268         let (temporary_channel_id, tx, _) = create_funding_transaction(&nodes[a], &nodes[b].node.get_our_node_id(), channel_value, 42);
1269         nodes[a].node.funding_transaction_generated(&temporary_channel_id, &nodes[b].node.get_our_node_id(), tx.clone()).unwrap();
1270         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()));
1271         check_added_monitors!(nodes[b], 1);
1272
1273         let cs_funding_signed = get_event_msg!(nodes[b], MessageSendEvent::SendFundingSigned, nodes[a].node.get_our_node_id());
1274         expect_channel_pending_event(&nodes[b], &nodes[a].node.get_our_node_id());
1275
1276         nodes[a].node.handle_funding_signed(&nodes[b].node.get_our_node_id(), &cs_funding_signed);
1277         expect_channel_pending_event(&nodes[a], &nodes[b].node.get_our_node_id());
1278         check_added_monitors!(nodes[a], 1);
1279
1280         assert_eq!(nodes[a].tx_broadcaster.txn_broadcasted.lock().unwrap().len(), 1);
1281         assert_eq!(nodes[a].tx_broadcaster.txn_broadcasted.lock().unwrap()[0], tx);
1282         nodes[a].tx_broadcaster.txn_broadcasted.lock().unwrap().clear();
1283
1284         let conf_height = core::cmp::max(nodes[a].best_block_info().1 + 1, nodes[b].best_block_info().1 + 1);
1285         confirm_transaction_at(&nodes[a], &tx, conf_height);
1286         connect_blocks(&nodes[a], CHAN_CONFIRM_DEPTH - 1);
1287         confirm_transaction_at(&nodes[b], &tx, conf_height);
1288         connect_blocks(&nodes[b], CHAN_CONFIRM_DEPTH - 1);
1289         let as_channel_ready = get_event_msg!(nodes[a], MessageSendEvent::SendChannelReady, nodes[b].node.get_our_node_id());
1290         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()));
1291         expect_channel_ready_event(&nodes[a], &nodes[b].node.get_our_node_id());
1292         let as_update = get_event_msg!(nodes[a], MessageSendEvent::SendChannelUpdate, nodes[b].node.get_our_node_id());
1293         nodes[b].node.handle_channel_ready(&nodes[a].node.get_our_node_id(), &as_channel_ready);
1294         expect_channel_ready_event(&nodes[b], &nodes[a].node.get_our_node_id());
1295         let bs_update = get_event_msg!(nodes[b], MessageSendEvent::SendChannelUpdate, nodes[a].node.get_our_node_id());
1296
1297         nodes[a].node.handle_channel_update(&nodes[b].node.get_our_node_id(), &bs_update);
1298         nodes[b].node.handle_channel_update(&nodes[a].node.get_our_node_id(), &as_update);
1299
1300         let mut found_a = false;
1301         for chan in nodes[a].node.list_usable_channels() {
1302                 if chan.channel_id == as_channel_ready.channel_id {
1303                         assert!(!found_a);
1304                         found_a = true;
1305                         assert!(!chan.is_public);
1306                 }
1307         }
1308         assert!(found_a);
1309
1310         let mut found_b = false;
1311         for chan in nodes[b].node.list_usable_channels() {
1312                 if chan.channel_id == as_channel_ready.channel_id {
1313                         assert!(!found_b);
1314                         found_b = true;
1315                         assert!(!chan.is_public);
1316                 }
1317         }
1318         assert!(found_b);
1319
1320         (as_channel_ready, tx)
1321 }
1322
1323 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) {
1324         for node in nodes {
1325                 assert!(node.gossip_sync.handle_channel_announcement(ann).unwrap());
1326                 node.gossip_sync.handle_channel_update(upd_1).unwrap();
1327                 node.gossip_sync.handle_channel_update(upd_2).unwrap();
1328
1329                 // Note that channel_updates are also delivered to ChannelManagers to ensure we have
1330                 // forwarding info for local channels even if its not accepted in the network graph.
1331                 node.node.handle_channel_update(&nodes[a].node.get_our_node_id(), &upd_1);
1332                 node.node.handle_channel_update(&nodes[b].node.get_our_node_id(), &upd_2);
1333         }
1334 }
1335
1336 pub fn do_check_spends<F: Fn(&bitcoin::blockdata::transaction::OutPoint) -> Option<TxOut>>(tx: &Transaction, get_output: F) {
1337         for outp in tx.output.iter() {
1338                 assert!(outp.value >= outp.script_pubkey.dust_value().to_sat(), "Spending tx output didn't meet dust limit");
1339         }
1340         let mut total_value_in = 0;
1341         for input in tx.input.iter() {
1342                 total_value_in += get_output(&input.previous_output).unwrap().value;
1343         }
1344         let mut total_value_out = 0;
1345         for output in tx.output.iter() {
1346                 total_value_out += output.value;
1347         }
1348         let min_fee = (tx.weight() as u64 + 3) / 4; // One sat per vbyte (ie per weight/4, rounded up)
1349         // Input amount - output amount = fee, so check that out + min_fee is smaller than input
1350         assert!(total_value_out + min_fee <= total_value_in);
1351         tx.verify(get_output).unwrap();
1352 }
1353
1354 #[macro_export]
1355 macro_rules! check_spends {
1356         ($tx: expr, $($spends_txn: expr),*) => {
1357                 {
1358                         $(
1359                         for outp in $spends_txn.output.iter() {
1360                                 assert!(outp.value >= outp.script_pubkey.dust_value().to_sat(), "Input tx output didn't meet dust limit");
1361                         }
1362                         )*
1363                         let get_output = |out_point: &bitcoin::blockdata::transaction::OutPoint| {
1364                                 $(
1365                                         if out_point.txid == $spends_txn.txid() {
1366                                                 return $spends_txn.output.get(out_point.vout as usize).cloned()
1367                                         }
1368                                 )*
1369                                 None
1370                         };
1371                         $crate::ln::functional_test_utils::do_check_spends(&$tx, get_output);
1372                 }
1373         }
1374 }
1375
1376 macro_rules! get_closing_signed_broadcast {
1377         ($node: expr, $dest_pubkey: expr) => {
1378                 {
1379                         let events = $node.get_and_clear_pending_msg_events();
1380                         assert!(events.len() == 1 || events.len() == 2);
1381                         (match events[events.len() - 1] {
1382                                 MessageSendEvent::BroadcastChannelUpdate { ref msg } => {
1383                                         assert_eq!(msg.contents.flags & 2, 2);
1384                                         msg.clone()
1385                                 },
1386                                 _ => panic!("Unexpected event"),
1387                         }, if events.len() == 2 {
1388                                 match events[0] {
1389                                         MessageSendEvent::SendClosingSigned { ref node_id, ref msg } => {
1390                                                 assert_eq!(*node_id, $dest_pubkey);
1391                                                 Some(msg.clone())
1392                                         },
1393                                         _ => panic!("Unexpected event"),
1394                                 }
1395                         } else { None })
1396                 }
1397         }
1398 }
1399
1400 #[cfg(test)]
1401 macro_rules! check_warn_msg {
1402         ($node: expr, $recipient_node_id: expr, $chan_id: expr) => {{
1403                 let msg_events = $node.node.get_and_clear_pending_msg_events();
1404                 assert_eq!(msg_events.len(), 1);
1405                 match msg_events[0] {
1406                         MessageSendEvent::HandleError { action: ErrorAction::SendWarningMessage { ref msg, log_level: _ }, node_id } => {
1407                                 assert_eq!(node_id, $recipient_node_id);
1408                                 assert_eq!(msg.channel_id, $chan_id);
1409                                 msg.data.clone()
1410                         },
1411                         _ => panic!("Unexpected event"),
1412                 }
1413         }}
1414 }
1415
1416 /// Check that a channel's closing channel update has been broadcasted, and optionally
1417 /// check whether an error message event has occurred.
1418 pub fn check_closed_broadcast(node: &Node, num_channels: usize, with_error_msg: bool) -> Vec<msgs::ErrorMessage> {
1419         let msg_events = node.node.get_and_clear_pending_msg_events();
1420         assert_eq!(msg_events.len(), if with_error_msg { num_channels * 2 } else { num_channels });
1421         msg_events.into_iter().filter_map(|msg_event| {
1422                 match msg_event {
1423                         MessageSendEvent::BroadcastChannelUpdate { ref msg } => {
1424                                 assert_eq!(msg.contents.flags & 2, 2);
1425                                 None
1426                         },
1427                         MessageSendEvent::HandleError { action: msgs::ErrorAction::SendErrorMessage { ref msg }, node_id: _ } => {
1428                                 assert!(with_error_msg);
1429                                 // TODO: Check node_id
1430                                 Some(msg.clone())
1431                         },
1432                         _ => panic!("Unexpected event"),
1433                 }
1434         }).collect()
1435 }
1436
1437 /// Check that a channel's closing channel update has been broadcasted, and optionally
1438 /// check whether an error message event has occurred.
1439 ///
1440 /// Don't use this, use the identically-named function instead.
1441 #[macro_export]
1442 macro_rules! check_closed_broadcast {
1443         ($node: expr, $with_error_msg: expr) => {
1444                 $crate::ln::functional_test_utils::check_closed_broadcast(&$node, 1, $with_error_msg).pop()
1445         }
1446 }
1447
1448 /// Check that a channel's closing channel events has been issued
1449 pub fn check_closed_event(node: &Node, events_count: usize, expected_reason: ClosureReason, is_check_discard_funding: bool,
1450         expected_counterparty_node_ids: &[PublicKey], expected_channel_capacity: u64) {
1451         let events = node.node.get_and_clear_pending_events();
1452         assert_eq!(events.len(), events_count, "{:?}", events);
1453         let mut issues_discard_funding = false;
1454         for (idx, event) in events.into_iter().enumerate() {
1455                 match event {
1456                         Event::ChannelClosed { ref reason, counterparty_node_id,
1457                                 channel_capacity_sats, .. } => {
1458                                 assert_eq!(*reason, expected_reason);
1459                                 assert_eq!(counterparty_node_id.unwrap(), expected_counterparty_node_ids[idx]);
1460                                 assert_eq!(channel_capacity_sats.unwrap(), expected_channel_capacity);
1461                         },
1462                         Event::DiscardFunding { .. } => {
1463                                 issues_discard_funding = true;
1464                         }
1465                         _ => panic!("Unexpected event"),
1466                 }
1467         }
1468         assert_eq!(is_check_discard_funding, issues_discard_funding);
1469 }
1470
1471 /// Check that a channel's closing channel events has been issued
1472 ///
1473 /// Don't use this, use the identically-named function instead.
1474 #[macro_export]
1475 macro_rules! check_closed_event {
1476         ($node: expr, $events: expr, $reason: expr, $counterparty_node_ids: expr, $channel_capacity: expr) => {
1477                 check_closed_event!($node, $events, $reason, false, $counterparty_node_ids, $channel_capacity);
1478         };
1479         ($node: expr, $events: expr, $reason: expr, $is_check_discard_funding: expr, $counterparty_node_ids: expr, $channel_capacity: expr) => {
1480                 $crate::ln::functional_test_utils::check_closed_event(&$node, $events, $reason,
1481                         $is_check_discard_funding, &$counterparty_node_ids, $channel_capacity);
1482         }
1483 }
1484
1485 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) {
1486         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) };
1487         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) };
1488         let (tx_a, tx_b);
1489
1490         node_a.close_channel(channel_id, &node_b.get_our_node_id()).unwrap();
1491         node_b.handle_shutdown(&node_a.get_our_node_id(), &get_event_msg!(struct_a, MessageSendEvent::SendShutdown, node_b.get_our_node_id()));
1492
1493         let events_1 = node_b.get_and_clear_pending_msg_events();
1494         assert!(events_1.len() >= 1);
1495         let shutdown_b = match events_1[0] {
1496                 MessageSendEvent::SendShutdown { ref node_id, ref msg } => {
1497                         assert_eq!(node_id, &node_a.get_our_node_id());
1498                         msg.clone()
1499                 },
1500                 _ => panic!("Unexpected event"),
1501         };
1502
1503         let closing_signed_b = if !close_inbound_first {
1504                 assert_eq!(events_1.len(), 1);
1505                 None
1506         } else {
1507                 Some(match events_1[1] {
1508                         MessageSendEvent::SendClosingSigned { ref node_id, ref msg } => {
1509                                 assert_eq!(node_id, &node_a.get_our_node_id());
1510                                 msg.clone()
1511                         },
1512                         _ => panic!("Unexpected event"),
1513                 })
1514         };
1515
1516         node_a.handle_shutdown(&node_b.get_our_node_id(), &shutdown_b);
1517         let (as_update, bs_update) = if close_inbound_first {
1518                 assert!(node_a.get_and_clear_pending_msg_events().is_empty());
1519                 node_a.handle_closing_signed(&node_b.get_our_node_id(), &closing_signed_b.unwrap());
1520
1521                 node_b.handle_closing_signed(&node_a.get_our_node_id(), &get_event_msg!(struct_a, MessageSendEvent::SendClosingSigned, node_b.get_our_node_id()));
1522                 assert_eq!(broadcaster_b.txn_broadcasted.lock().unwrap().len(), 1);
1523                 tx_b = broadcaster_b.txn_broadcasted.lock().unwrap().remove(0);
1524                 let (bs_update, closing_signed_b) = get_closing_signed_broadcast!(node_b, node_a.get_our_node_id());
1525
1526                 node_a.handle_closing_signed(&node_b.get_our_node_id(), &closing_signed_b.unwrap());
1527                 let (as_update, none_a) = get_closing_signed_broadcast!(node_a, node_b.get_our_node_id());
1528                 assert!(none_a.is_none());
1529                 assert_eq!(broadcaster_a.txn_broadcasted.lock().unwrap().len(), 1);
1530                 tx_a = broadcaster_a.txn_broadcasted.lock().unwrap().remove(0);
1531                 (as_update, bs_update)
1532         } else {
1533                 let closing_signed_a = get_event_msg!(struct_a, MessageSendEvent::SendClosingSigned, node_b.get_our_node_id());
1534
1535                 node_b.handle_closing_signed(&node_a.get_our_node_id(), &closing_signed_a);
1536                 node_a.handle_closing_signed(&node_b.get_our_node_id(), &get_event_msg!(struct_b, MessageSendEvent::SendClosingSigned, node_a.get_our_node_id()));
1537
1538                 assert_eq!(broadcaster_a.txn_broadcasted.lock().unwrap().len(), 1);
1539                 tx_a = broadcaster_a.txn_broadcasted.lock().unwrap().remove(0);
1540                 let (as_update, closing_signed_a) = get_closing_signed_broadcast!(node_a, node_b.get_our_node_id());
1541
1542                 node_b.handle_closing_signed(&node_a.get_our_node_id(), &closing_signed_a.unwrap());
1543                 let (bs_update, none_b) = get_closing_signed_broadcast!(node_b, node_a.get_our_node_id());
1544                 assert!(none_b.is_none());
1545                 assert_eq!(broadcaster_b.txn_broadcasted.lock().unwrap().len(), 1);
1546                 tx_b = broadcaster_b.txn_broadcasted.lock().unwrap().remove(0);
1547                 (as_update, bs_update)
1548         };
1549         assert_eq!(tx_a, tx_b);
1550         check_spends!(tx_a, funding_tx);
1551
1552         (as_update, bs_update, tx_a)
1553 }
1554
1555 pub struct SendEvent {
1556         pub node_id: PublicKey,
1557         pub msgs: Vec<msgs::UpdateAddHTLC>,
1558         pub commitment_msg: msgs::CommitmentSigned,
1559 }
1560 impl SendEvent {
1561         pub fn from_commitment_update(node_id: PublicKey, updates: msgs::CommitmentUpdate) -> SendEvent {
1562                 assert!(updates.update_fulfill_htlcs.is_empty());
1563                 assert!(updates.update_fail_htlcs.is_empty());
1564                 assert!(updates.update_fail_malformed_htlcs.is_empty());
1565                 assert!(updates.update_fee.is_none());
1566                 SendEvent { node_id, msgs: updates.update_add_htlcs, commitment_msg: updates.commitment_signed }
1567         }
1568
1569         pub fn from_event(event: MessageSendEvent) -> SendEvent {
1570                 match event {
1571                         MessageSendEvent::UpdateHTLCs { node_id, updates } => SendEvent::from_commitment_update(node_id, updates),
1572                         _ => panic!("Unexpected event type!"),
1573                 }
1574         }
1575
1576         pub fn from_node<'a, 'b, 'c>(node: &Node<'a, 'b, 'c>) -> SendEvent {
1577                 let mut events = node.node.get_and_clear_pending_msg_events();
1578                 assert_eq!(events.len(), 1);
1579                 SendEvent::from_event(events.pop().unwrap())
1580         }
1581 }
1582
1583 #[macro_export]
1584 /// Don't use this, use the identically-named function instead.
1585 macro_rules! expect_pending_htlcs_forwardable_conditions {
1586         ($node: expr, $expected_failures: expr) => {
1587                 $crate::ln::functional_test_utils::expect_pending_htlcs_forwardable_conditions($node.node.get_and_clear_pending_events(), &$expected_failures);
1588         }
1589 }
1590
1591 #[macro_export]
1592 macro_rules! expect_htlc_handling_failed_destinations {
1593         ($events: expr, $expected_failures: expr) => {{
1594                 for event in $events {
1595                         match event {
1596                                 $crate::events::Event::PendingHTLCsForwardable { .. } => { },
1597                                 $crate::events::Event::HTLCHandlingFailed { ref failed_next_destination, .. } => {
1598                                         assert!($expected_failures.contains(&failed_next_destination))
1599                                 },
1600                                 _ => panic!("Unexpected destination"),
1601                         }
1602                 }
1603         }}
1604 }
1605
1606 /// Checks that an [`Event::PendingHTLCsForwardable`] is available in the given events and, if
1607 /// there are any [`Event::HTLCHandlingFailed`] events their [`HTLCDestination`] is included in the
1608 /// `expected_failures` set.
1609 pub fn expect_pending_htlcs_forwardable_conditions(events: Vec<Event>, expected_failures: &[HTLCDestination]) {
1610         match events[0] {
1611                 Event::PendingHTLCsForwardable { .. } => { },
1612                 _ => panic!("Unexpected event {:?}", events),
1613         };
1614
1615         let count = expected_failures.len() + 1;
1616         assert_eq!(events.len(), count);
1617
1618         if expected_failures.len() > 0 {
1619                 expect_htlc_handling_failed_destinations!(events, expected_failures)
1620         }
1621 }
1622
1623 #[macro_export]
1624 /// Clears (and ignores) a PendingHTLCsForwardable event
1625 ///
1626 /// Don't use this, call [`expect_pending_htlcs_forwardable_conditions()`] with an empty failure
1627 /// set instead.
1628 macro_rules! expect_pending_htlcs_forwardable_ignore {
1629         ($node: expr) => {
1630                 $crate::ln::functional_test_utils::expect_pending_htlcs_forwardable_conditions($node.node.get_and_clear_pending_events(), &[]);
1631         }
1632 }
1633
1634 #[macro_export]
1635 /// Clears (and ignores) PendingHTLCsForwardable and HTLCHandlingFailed events
1636 ///
1637 /// Don't use this, call [`expect_pending_htlcs_forwardable_conditions()`] instead.
1638 macro_rules! expect_pending_htlcs_forwardable_and_htlc_handling_failed_ignore {
1639         ($node: expr, $expected_failures: expr) => {
1640                 $crate::ln::functional_test_utils::expect_pending_htlcs_forwardable_conditions($node.node.get_and_clear_pending_events(), &$expected_failures);
1641         }
1642 }
1643
1644 #[macro_export]
1645 /// Handles a PendingHTLCsForwardable event
1646 macro_rules! expect_pending_htlcs_forwardable {
1647         ($node: expr) => {{
1648                 $crate::ln::functional_test_utils::expect_pending_htlcs_forwardable_conditions($node.node.get_and_clear_pending_events(), &[]);
1649                 $node.node.process_pending_htlc_forwards();
1650
1651                 // Ensure process_pending_htlc_forwards is idempotent.
1652                 $node.node.process_pending_htlc_forwards();
1653         }};
1654 }
1655
1656 #[macro_export]
1657 /// Handles a PendingHTLCsForwardable and HTLCHandlingFailed event
1658 macro_rules! expect_pending_htlcs_forwardable_and_htlc_handling_failed {
1659         ($node: expr, $expected_failures: expr) => {{
1660                 $crate::ln::functional_test_utils::expect_pending_htlcs_forwardable_conditions($node.node.get_and_clear_pending_events(), &$expected_failures);
1661                 $node.node.process_pending_htlc_forwards();
1662
1663                 // Ensure process_pending_htlc_forwards is idempotent.
1664                 $node.node.process_pending_htlc_forwards();
1665         }}
1666 }
1667
1668 #[cfg(test)]
1669 macro_rules! expect_pending_htlcs_forwardable_from_events {
1670         ($node: expr, $events: expr, $ignore: expr) => {{
1671                 assert_eq!($events.len(), 1);
1672                 match $events[0] {
1673                         Event::PendingHTLCsForwardable { .. } => { },
1674                         _ => panic!("Unexpected event"),
1675                 };
1676                 if $ignore {
1677                         $node.node.process_pending_htlc_forwards();
1678
1679                         // Ensure process_pending_htlc_forwards is idempotent.
1680                         $node.node.process_pending_htlc_forwards();
1681                 }
1682         }}
1683 }
1684
1685 #[macro_export]
1686 /// Performs the "commitment signed dance" - the series of message exchanges which occur after a
1687 /// commitment update.
1688 macro_rules! commitment_signed_dance {
1689         ($node_a: expr, $node_b: expr, $commitment_signed: expr, $fail_backwards: expr, true /* skip last step */) => {
1690                 $crate::ln::functional_test_utils::do_commitment_signed_dance(&$node_a, &$node_b, &$commitment_signed, $fail_backwards, true);
1691         };
1692         ($node_a: expr, $node_b: expr, (), $fail_backwards: expr, true /* skip last step */, true /* return extra message */, true /* return last RAA */) => {
1693                 $crate::ln::functional_test_utils::do_main_commitment_signed_dance(&$node_a, &$node_b, $fail_backwards)
1694         };
1695         ($node_a: expr, $node_b: expr, $commitment_signed: expr, $fail_backwards: expr, true /* skip last step */, false /* return extra message */, true /* return last RAA */) => {
1696                 {
1697                         $crate::ln::functional_test_utils::check_added_monitors(&$node_a, 0);
1698                         assert!($node_a.node.get_and_clear_pending_msg_events().is_empty());
1699                         $node_a.node.handle_commitment_signed(&$node_b.node.get_our_node_id(), &$commitment_signed);
1700                         check_added_monitors(&$node_a, 1);
1701                         let (extra_msg_option, bs_revoke_and_ack) = $crate::ln::functional_test_utils::do_main_commitment_signed_dance(&$node_a, &$node_b, $fail_backwards);
1702                         assert!(extra_msg_option.is_none());
1703                         bs_revoke_and_ack
1704                 }
1705         };
1706         ($node_a: expr, $node_b: expr, (), $fail_backwards: expr, true /* skip last step */, false /* no extra message */, $incl_claim: expr) => {
1707                 assert!($crate::ln::functional_test_utils::commitment_signed_dance_through_cp_raa(&$node_a, &$node_b, $fail_backwards, $incl_claim).is_none());
1708         };
1709         ($node_a: expr, $node_b: expr, $commitment_signed: expr, $fail_backwards: expr) => {
1710                 $crate::ln::functional_test_utils::do_commitment_signed_dance(&$node_a, &$node_b, &$commitment_signed, $fail_backwards, false);
1711         }
1712 }
1713
1714 /// Runs the commitment_signed dance after the initial commitment_signed is delivered through to
1715 /// the initiator's `revoke_and_ack` response. i.e. [`do_main_commitment_signed_dance`] plus the
1716 /// `revoke_and_ack` response to it.
1717 ///
1718 /// An HTLC claim on one channel blocks the RAA channel monitor update for the outbound edge
1719 /// channel until the inbound edge channel preimage monitor update completes. Thus, when checking
1720 /// for channel monitor updates, we need to know if an `update_fulfill_htlc` was included in the
1721 /// the commitment we're exchanging. `includes_claim` provides that information.
1722 ///
1723 /// Returns any additional message `node_b` generated in addition to the `revoke_and_ack` response.
1724 pub fn commitment_signed_dance_through_cp_raa(node_a: &Node<'_, '_, '_>, node_b: &Node<'_, '_, '_>, fail_backwards: bool, includes_claim: bool) -> Option<MessageSendEvent> {
1725         let (extra_msg_option, bs_revoke_and_ack) = do_main_commitment_signed_dance(node_a, node_b, fail_backwards);
1726         node_a.node.handle_revoke_and_ack(&node_b.node.get_our_node_id(), &bs_revoke_and_ack);
1727         check_added_monitors(node_a, if includes_claim { 0 } else { 1 });
1728         extra_msg_option
1729 }
1730
1731 /// Does the main logic in the commitment_signed dance. After the first `commitment_signed` has
1732 /// been delivered, this method picks up and delivers the response `revoke_and_ack` and
1733 /// `commitment_signed`, returning the recipient's `revoke_and_ack` and any extra message it may
1734 /// have included.
1735 pub fn do_main_commitment_signed_dance(node_a: &Node<'_, '_, '_>, node_b: &Node<'_, '_, '_>, fail_backwards: bool) -> (Option<MessageSendEvent>, msgs::RevokeAndACK) {
1736         let (as_revoke_and_ack, as_commitment_signed) = get_revoke_commit_msgs!(node_a, node_b.node.get_our_node_id());
1737         check_added_monitors!(node_b, 0);
1738         assert!(node_b.node.get_and_clear_pending_msg_events().is_empty());
1739         node_b.node.handle_revoke_and_ack(&node_a.node.get_our_node_id(), &as_revoke_and_ack);
1740         assert!(node_b.node.get_and_clear_pending_msg_events().is_empty());
1741         check_added_monitors!(node_b, 1);
1742         node_b.node.handle_commitment_signed(&node_a.node.get_our_node_id(), &as_commitment_signed);
1743         let (bs_revoke_and_ack, extra_msg_option) = {
1744                 let mut events = node_b.node.get_and_clear_pending_msg_events();
1745                 assert!(events.len() <= 2);
1746                 let node_a_event = remove_first_msg_event_to_node(&node_a.node.get_our_node_id(), &mut events);
1747                 (match node_a_event {
1748                         MessageSendEvent::SendRevokeAndACK { ref node_id, ref msg } => {
1749                                 assert_eq!(*node_id, node_a.node.get_our_node_id());
1750                                 (*msg).clone()
1751                         },
1752                         _ => panic!("Unexpected event"),
1753                 }, events.get(0).map(|e| e.clone()))
1754         };
1755         check_added_monitors!(node_b, 1);
1756         if fail_backwards {
1757                 assert!(node_a.node.get_and_clear_pending_events().is_empty());
1758                 assert!(node_a.node.get_and_clear_pending_msg_events().is_empty());
1759         }
1760         (extra_msg_option, bs_revoke_and_ack)
1761 }
1762
1763 /// Runs a full commitment_signed dance, delivering a commitment_signed, the responding
1764 /// `revoke_and_ack` and `commitment_signed`, and then the final `revoke_and_ack` response.
1765 ///
1766 /// If `skip_last_step` is unset, also checks for the payment failure update for the previous hop
1767 /// on failure or that no new messages are left over on success.
1768 pub fn do_commitment_signed_dance(node_a: &Node<'_, '_, '_>, node_b: &Node<'_, '_, '_>, commitment_signed: &msgs::CommitmentSigned, fail_backwards: bool, skip_last_step: bool) {
1769         check_added_monitors!(node_a, 0);
1770         assert!(node_a.node.get_and_clear_pending_msg_events().is_empty());
1771         node_a.node.handle_commitment_signed(&node_b.node.get_our_node_id(), commitment_signed);
1772         check_added_monitors!(node_a, 1);
1773
1774         // If this commitment signed dance was due to a claim, don't check for an RAA monitor update.
1775         let got_claim = node_a.node.pending_events.lock().unwrap().iter().any(|(ev, action)| {
1776                 let matching_action = if let Some(channelmanager::EventCompletionAction::ReleaseRAAChannelMonitorUpdate
1777                         { channel_funding_outpoint, counterparty_node_id }) = action
1778                 {
1779                         if channel_funding_outpoint.to_channel_id() == commitment_signed.channel_id {
1780                                 assert_eq!(*counterparty_node_id, node_b.node.get_our_node_id());
1781                                 true
1782                         } else { false }
1783                 } else { false };
1784                 if matching_action {
1785                         if let Event::PaymentSent { .. } = ev {} else { panic!(); }
1786                 }
1787                 matching_action
1788         });
1789         if fail_backwards { assert!(!got_claim); }
1790         commitment_signed_dance!(node_a, node_b, (), fail_backwards, true, false, got_claim);
1791
1792         if skip_last_step { return; }
1793
1794         if fail_backwards {
1795                 expect_pending_htlcs_forwardable_and_htlc_handling_failed!(node_a,
1796                         vec![crate::events::HTLCDestination::NextHopChannel{ node_id: Some(node_b.node.get_our_node_id()), channel_id: commitment_signed.channel_id }]);
1797                 check_added_monitors!(node_a, 1);
1798
1799                 let node_a_per_peer_state = node_a.node.per_peer_state.read().unwrap();
1800                 let mut number_of_msg_events = 0;
1801                 for (cp_id, peer_state_mutex) in node_a_per_peer_state.iter() {
1802                         let peer_state = peer_state_mutex.lock().unwrap();
1803                         let cp_pending_msg_events = &peer_state.pending_msg_events;
1804                         number_of_msg_events += cp_pending_msg_events.len();
1805                         if cp_pending_msg_events.len() == 1 {
1806                                 if let MessageSendEvent::UpdateHTLCs { .. } = cp_pending_msg_events[0] {
1807                                         assert_ne!(*cp_id, node_b.node.get_our_node_id());
1808                                 } else { panic!("Unexpected event"); }
1809                         }
1810                 }
1811                 // Expecting the failure backwards event to the previous hop (not `node_b`)
1812                 assert_eq!(number_of_msg_events, 1);
1813         } else {
1814                 assert!(node_a.node.get_and_clear_pending_msg_events().is_empty());
1815         }
1816 }
1817
1818 /// Get a payment preimage and hash.
1819 pub fn get_payment_preimage_hash(recipient: &Node, min_value_msat: Option<u64>, min_final_cltv_expiry_delta: Option<u16>) -> (PaymentPreimage, PaymentHash, PaymentSecret) {
1820         let mut payment_count = recipient.network_payment_count.borrow_mut();
1821         let payment_preimage = PaymentPreimage([*payment_count; 32]);
1822         *payment_count += 1;
1823         let payment_hash = PaymentHash(Sha256::hash(&payment_preimage.0[..]).into_inner());
1824         let payment_secret = recipient.node.create_inbound_payment_for_hash(payment_hash, min_value_msat, 7200, min_final_cltv_expiry_delta).unwrap();
1825         (payment_preimage, payment_hash, payment_secret)
1826 }
1827
1828 /// Get a payment preimage and hash.
1829 ///
1830 /// Don't use this, use the identically-named function instead.
1831 #[macro_export]
1832 macro_rules! get_payment_preimage_hash {
1833         ($dest_node: expr) => {
1834                 get_payment_preimage_hash!($dest_node, None)
1835         };
1836         ($dest_node: expr, $min_value_msat: expr) => {
1837                 crate::get_payment_preimage_hash!($dest_node, $min_value_msat, None)
1838         };
1839         ($dest_node: expr, $min_value_msat: expr, $min_final_cltv_expiry_delta: expr) => {
1840                 $crate::ln::functional_test_utils::get_payment_preimage_hash(&$dest_node, $min_value_msat, $min_final_cltv_expiry_delta)
1841         };
1842 }
1843
1844 /// Gets a route from the given sender to the node described in `payment_params`.
1845 pub fn get_route(send_node: &Node, route_params: &RouteParameters) -> Result<Route, msgs::LightningError> {
1846         let scorer = TestScorer::new();
1847         let keys_manager = TestKeysInterface::new(&[0u8; 32], bitcoin::network::constants::Network::Testnet);
1848         let random_seed_bytes = keys_manager.get_secure_random_bytes();
1849         router::get_route(
1850                 &send_node.node.get_our_node_id(), route_params, &send_node.network_graph.read_only(),
1851                 Some(&send_node.node.list_usable_channels().iter().collect::<Vec<_>>()),
1852                 send_node.logger, &scorer, &(), &random_seed_bytes
1853         )
1854 }
1855
1856 /// Gets a route from the given sender to the node described in `payment_params`.
1857 ///
1858 /// Don't use this, use the identically-named function instead.
1859 #[macro_export]
1860 macro_rules! get_route {
1861         ($send_node: expr, $payment_params: expr, $recv_value: expr) => {{
1862                 let route_params = $crate::routing::router::RouteParameters::from_payment_params_and_value($payment_params, $recv_value);
1863                 $crate::ln::functional_test_utils::get_route(&$send_node, &route_params)
1864         }}
1865 }
1866
1867 #[cfg(test)]
1868 #[macro_export]
1869 macro_rules! get_route_and_payment_hash {
1870         ($send_node: expr, $recv_node: expr, $recv_value: expr) => {{
1871                 let payment_params = $crate::routing::router::PaymentParameters::from_node_id($recv_node.node.get_our_node_id(), TEST_FINAL_CLTV)
1872                         .with_bolt11_features($recv_node.node.invoice_features()).unwrap();
1873                 $crate::get_route_and_payment_hash!($send_node, $recv_node, payment_params, $recv_value)
1874         }};
1875         ($send_node: expr, $recv_node: expr, $payment_params: expr, $recv_value: expr) => {{
1876                 let route_params = $crate::routing::router::RouteParameters::from_payment_params_and_value($payment_params, $recv_value);
1877                 let (payment_preimage, payment_hash, payment_secret) =
1878                         $crate::ln::functional_test_utils::get_payment_preimage_hash(&$recv_node, Some($recv_value), None);
1879                 let route = $crate::ln::functional_test_utils::get_route(&$send_node, &route_params);
1880                 (route.unwrap(), payment_hash, payment_preimage, payment_secret)
1881         }}
1882 }
1883
1884 pub fn check_payment_claimable(
1885         event: &Event, expected_payment_hash: PaymentHash, expected_payment_secret: PaymentSecret,
1886         expected_recv_value: u64, expected_payment_preimage: Option<PaymentPreimage>,
1887         expected_receiver_node_id: PublicKey,
1888 ) {
1889         match event {
1890                 Event::PaymentClaimable { ref payment_hash, ref purpose, amount_msat, receiver_node_id, .. } => {
1891                         assert_eq!(expected_payment_hash, *payment_hash);
1892                         assert_eq!(expected_recv_value, *amount_msat);
1893                         assert_eq!(expected_receiver_node_id, receiver_node_id.unwrap());
1894                         match purpose {
1895                                 PaymentPurpose::InvoicePayment { payment_preimage, payment_secret, .. } => {
1896                                         assert_eq!(&expected_payment_preimage, payment_preimage);
1897                                         assert_eq!(expected_payment_secret, *payment_secret);
1898                                 },
1899                                 _ => {},
1900                         }
1901                 },
1902                 _ => panic!("Unexpected event"),
1903         }
1904 }
1905
1906 #[macro_export]
1907 #[cfg(any(test, ldk_bench, feature = "_test_utils"))]
1908 macro_rules! expect_payment_claimable {
1909         ($node: expr, $expected_payment_hash: expr, $expected_payment_secret: expr, $expected_recv_value: expr) => {
1910                 expect_payment_claimable!($node, $expected_payment_hash, $expected_payment_secret, $expected_recv_value, None, $node.node.get_our_node_id())
1911         };
1912         ($node: expr, $expected_payment_hash: expr, $expected_payment_secret: expr, $expected_recv_value: expr, $expected_payment_preimage: expr, $expected_receiver_node_id: expr) => {
1913                 let events = $node.node.get_and_clear_pending_events();
1914                 assert_eq!(events.len(), 1);
1915                 $crate::ln::functional_test_utils::check_payment_claimable(&events[0], $expected_payment_hash, $expected_payment_secret, $expected_recv_value, $expected_payment_preimage, $expected_receiver_node_id)
1916         };
1917 }
1918
1919 #[macro_export]
1920 #[cfg(any(test, ldk_bench, feature = "_test_utils"))]
1921 macro_rules! expect_payment_claimed {
1922         ($node: expr, $expected_payment_hash: expr, $expected_recv_value: expr) => {
1923                 let events = $node.node.get_and_clear_pending_events();
1924                 assert_eq!(events.len(), 1);
1925                 match events[0] {
1926                         $crate::events::Event::PaymentClaimed { ref payment_hash, amount_msat, .. } => {
1927                                 assert_eq!($expected_payment_hash, *payment_hash);
1928                                 assert_eq!($expected_recv_value, amount_msat);
1929                         },
1930                         _ => panic!("Unexpected event"),
1931                 }
1932         }
1933 }
1934
1935 pub fn expect_payment_sent<CM: AChannelManager, H: NodeHolder<CM=CM>>(node: &H,
1936         expected_payment_preimage: PaymentPreimage, expected_fee_msat_opt: Option<Option<u64>>,
1937         expect_per_path_claims: bool, expect_post_ev_mon_update: bool,
1938 ) {
1939         let events = node.node().get_and_clear_pending_events();
1940         let expected_payment_hash = PaymentHash(
1941                 bitcoin::hashes::sha256::Hash::hash(&expected_payment_preimage.0).into_inner());
1942         if expect_per_path_claims {
1943                 assert!(events.len() > 1);
1944         } else {
1945                 assert_eq!(events.len(), 1);
1946         }
1947         if expect_post_ev_mon_update {
1948                 check_added_monitors(node, 1);
1949         }
1950         let expected_payment_id = match events[0] {
1951                 Event::PaymentSent { ref payment_id, ref payment_preimage, ref payment_hash, ref fee_paid_msat } => {
1952                         assert_eq!(expected_payment_preimage, *payment_preimage);
1953                         assert_eq!(expected_payment_hash, *payment_hash);
1954                         if let Some(expected_fee_msat) = expected_fee_msat_opt {
1955                                 assert_eq!(*fee_paid_msat, expected_fee_msat);
1956                         } else {
1957                                 assert!(fee_paid_msat.is_some());
1958                         }
1959                         payment_id.unwrap()
1960                 },
1961                 _ => panic!("Unexpected event"),
1962         };
1963         if expect_per_path_claims {
1964                 for i in 1..events.len() {
1965                         match events[i] {
1966                                 Event::PaymentPathSuccessful { payment_id, payment_hash, .. } => {
1967                                         assert_eq!(payment_id, expected_payment_id);
1968                                         assert_eq!(payment_hash, Some(expected_payment_hash));
1969                                 },
1970                                 _ => panic!("Unexpected event"),
1971                         }
1972                 }
1973         }
1974 }
1975
1976 #[macro_export]
1977 macro_rules! expect_payment_sent {
1978         ($node: expr, $expected_payment_preimage: expr) => {
1979                 $crate::expect_payment_sent!($node, $expected_payment_preimage, None::<u64>, true);
1980         };
1981         ($node: expr, $expected_payment_preimage: expr, $expected_fee_msat_opt: expr) => {
1982                 $crate::expect_payment_sent!($node, $expected_payment_preimage, $expected_fee_msat_opt, true);
1983         };
1984         ($node: expr, $expected_payment_preimage: expr, $expected_fee_msat_opt: expr, $expect_paths: expr) => {
1985                 $crate::ln::functional_test_utils::expect_payment_sent(&$node, $expected_payment_preimage,
1986                         $expected_fee_msat_opt.map(|o| Some(o)), $expect_paths, true);
1987         }
1988 }
1989
1990 #[cfg(test)]
1991 #[macro_export]
1992 macro_rules! expect_payment_path_successful {
1993         ($node: expr) => {
1994                 let events = $node.node.get_and_clear_pending_events();
1995                 assert_eq!(events.len(), 1);
1996                 match events[0] {
1997                         $crate::events::Event::PaymentPathSuccessful { .. } => {},
1998                         _ => panic!("Unexpected event"),
1999                 }
2000         }
2001 }
2002
2003 macro_rules! expect_payment_forwarded {
2004         ($node: expr, $prev_node: expr, $next_node: expr, $expected_fee: expr, $upstream_force_closed: expr, $downstream_force_closed: expr) => {
2005                 let events = $node.node.get_and_clear_pending_events();
2006                 assert_eq!(events.len(), 1);
2007                 match events[0] {
2008                         Event::PaymentForwarded {
2009                                 fee_earned_msat, prev_channel_id, claim_from_onchain_tx, next_channel_id,
2010                                 outbound_amount_forwarded_msat: _
2011                         } => {
2012                                 assert_eq!(fee_earned_msat, $expected_fee);
2013                                 if fee_earned_msat.is_some() {
2014                                         // Is the event prev_channel_id in one of the channels between the two nodes?
2015                                         assert!($node.node.list_channels().iter().any(|x| x.counterparty.node_id == $prev_node.node.get_our_node_id() && x.channel_id == prev_channel_id.unwrap()));
2016                                 }
2017                                 // We check for force closures since a force closed channel is removed from the
2018                                 // node's channel list
2019                                 if !$downstream_force_closed {
2020                                         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()));
2021                                 }
2022                                 assert_eq!(claim_from_onchain_tx, $downstream_force_closed);
2023                         },
2024                         _ => panic!("Unexpected event"),
2025                 }
2026         }
2027 }
2028
2029 #[cfg(test)]
2030 #[macro_export]
2031 macro_rules! expect_channel_shutdown_state {
2032         ($node: expr, $chan_id: expr, $state: path) => {
2033                 let chan_details = $node.node.list_channels().into_iter().filter(|cd| cd.channel_id == $chan_id).collect::<Vec<ChannelDetails>>();
2034                 assert_eq!(chan_details.len(), 1);
2035                 assert_eq!(chan_details[0].channel_shutdown_state, Some($state));
2036         }
2037 }
2038
2039 #[cfg(any(test, ldk_bench, feature = "_test_utils"))]
2040 pub fn expect_channel_pending_event<'a, 'b, 'c, 'd>(node: &'a Node<'b, 'c, 'd>, expected_counterparty_node_id: &PublicKey) {
2041         let events = node.node.get_and_clear_pending_events();
2042         assert_eq!(events.len(), 1);
2043         match events[0] {
2044                 crate::events::Event::ChannelPending { ref counterparty_node_id, .. } => {
2045                         assert_eq!(*expected_counterparty_node_id, *counterparty_node_id);
2046                 },
2047                 _ => panic!("Unexpected event"),
2048         }
2049 }
2050
2051 #[cfg(any(test, ldk_bench, feature = "_test_utils"))]
2052 pub fn expect_channel_ready_event<'a, 'b, 'c, 'd>(node: &'a Node<'b, 'c, 'd>, expected_counterparty_node_id: &PublicKey) {
2053         let events = node.node.get_and_clear_pending_events();
2054         assert_eq!(events.len(), 1);
2055         match events[0] {
2056                 crate::events::Event::ChannelReady{ ref counterparty_node_id, .. } => {
2057                         assert_eq!(*expected_counterparty_node_id, *counterparty_node_id);
2058                 },
2059                 _ => panic!("Unexpected event"),
2060         }
2061 }
2062
2063 pub struct PaymentFailedConditions<'a> {
2064         pub(crate) expected_htlc_error_data: Option<(u16, &'a [u8])>,
2065         pub(crate) expected_blamed_scid: Option<u64>,
2066         pub(crate) expected_blamed_chan_closed: Option<bool>,
2067         pub(crate) expected_mpp_parts_remain: bool,
2068 }
2069
2070 impl<'a> PaymentFailedConditions<'a> {
2071         pub fn new() -> Self {
2072                 Self {
2073                         expected_htlc_error_data: None,
2074                         expected_blamed_scid: None,
2075                         expected_blamed_chan_closed: None,
2076                         expected_mpp_parts_remain: false,
2077                 }
2078         }
2079         pub fn mpp_parts_remain(mut self) -> Self {
2080                 self.expected_mpp_parts_remain = true;
2081                 self
2082         }
2083         pub fn blamed_scid(mut self, scid: u64) -> Self {
2084                 self.expected_blamed_scid = Some(scid);
2085                 self
2086         }
2087         pub fn blamed_chan_closed(mut self, closed: bool) -> Self {
2088                 self.expected_blamed_chan_closed = Some(closed);
2089                 self
2090         }
2091         pub fn expected_htlc_error_data(mut self, code: u16, data: &'a [u8]) -> Self {
2092                 self.expected_htlc_error_data = Some((code, data));
2093                 self
2094         }
2095 }
2096
2097 #[cfg(test)]
2098 macro_rules! expect_payment_failed_with_update {
2099         ($node: expr, $expected_payment_hash: expr, $payment_failed_permanently: expr, $scid: expr, $chan_closed: expr) => {
2100                 $crate::ln::functional_test_utils::expect_payment_failed_conditions(
2101                         &$node, $expected_payment_hash, $payment_failed_permanently,
2102                         $crate::ln::functional_test_utils::PaymentFailedConditions::new()
2103                                 .blamed_scid($scid).blamed_chan_closed($chan_closed));
2104         }
2105 }
2106
2107 #[cfg(test)]
2108 macro_rules! expect_payment_failed {
2109         ($node: expr, $expected_payment_hash: expr, $payment_failed_permanently: expr $(, $expected_error_code: expr, $expected_error_data: expr)*) => {
2110                 #[allow(unused_mut)]
2111                 let mut conditions = $crate::ln::functional_test_utils::PaymentFailedConditions::new();
2112                 $(
2113                         conditions = conditions.expected_htlc_error_data($expected_error_code, &$expected_error_data);
2114                 )*
2115                 $crate::ln::functional_test_utils::expect_payment_failed_conditions(&$node, $expected_payment_hash, $payment_failed_permanently, conditions);
2116         };
2117 }
2118
2119 pub fn expect_payment_failed_conditions_event<'a, 'b, 'c, 'd, 'e>(
2120         payment_failed_events: Vec<Event>, expected_payment_hash: PaymentHash,
2121         expected_payment_failed_permanently: bool, conditions: PaymentFailedConditions<'e>
2122 ) {
2123         if conditions.expected_mpp_parts_remain { assert_eq!(payment_failed_events.len(), 1); } else { assert_eq!(payment_failed_events.len(), 2); }
2124         let expected_payment_id = match &payment_failed_events[0] {
2125                 Event::PaymentPathFailed { payment_hash, payment_failed_permanently, payment_id, failure,
2126                         #[cfg(test)]
2127                         error_code,
2128                         #[cfg(test)]
2129                         error_data, .. } => {
2130                         assert_eq!(*payment_hash, expected_payment_hash, "unexpected payment_hash");
2131                         assert_eq!(*payment_failed_permanently, expected_payment_failed_permanently, "unexpected payment_failed_permanently value");
2132                         #[cfg(test)]
2133                         {
2134                                 assert!(error_code.is_some(), "expected error_code.is_some() = true");
2135                                 assert!(error_data.is_some(), "expected error_data.is_some() = true");
2136                                 if let Some((code, data)) = conditions.expected_htlc_error_data {
2137                                         assert_eq!(error_code.unwrap(), code, "unexpected error code");
2138                                         assert_eq!(&error_data.as_ref().unwrap()[..], data, "unexpected error data");
2139                                 }
2140                         }
2141
2142                         if let Some(chan_closed) = conditions.expected_blamed_chan_closed {
2143                                 if let PathFailure::OnPath { network_update: Some(upd) } = failure {
2144                                         match upd {
2145                                                 NetworkUpdate::ChannelUpdateMessage { ref msg } if !chan_closed => {
2146                                                         if let Some(scid) = conditions.expected_blamed_scid {
2147                                                                 assert_eq!(msg.contents.short_channel_id, scid);
2148                                                         }
2149                                                         const CHAN_DISABLED_FLAG: u8 = 2;
2150                                                         assert_eq!(msg.contents.flags & CHAN_DISABLED_FLAG, 0);
2151                                                 },
2152                                                 NetworkUpdate::ChannelFailure { short_channel_id, is_permanent } if chan_closed => {
2153                                                         if let Some(scid) = conditions.expected_blamed_scid {
2154                                                                 assert_eq!(*short_channel_id, scid);
2155                                                         }
2156                                                         assert!(is_permanent);
2157                                                 },
2158                                                 _ => panic!("Unexpected update type"),
2159                                         }
2160                                 } else { panic!("Expected network update"); }
2161                         }
2162
2163                         payment_id.unwrap()
2164                 },
2165                 _ => panic!("Unexpected event"),
2166         };
2167         if !conditions.expected_mpp_parts_remain {
2168                 match &payment_failed_events[1] {
2169                         Event::PaymentFailed { ref payment_hash, ref payment_id, ref reason } => {
2170                                 assert_eq!(*payment_hash, expected_payment_hash, "unexpected second payment_hash");
2171                                 assert_eq!(*payment_id, expected_payment_id);
2172                                 assert_eq!(reason.unwrap(), if expected_payment_failed_permanently {
2173                                         PaymentFailureReason::RecipientRejected
2174                                 } else {
2175                                         PaymentFailureReason::RetriesExhausted
2176                                 });
2177                         }
2178                         _ => panic!("Unexpected second event"),
2179                 }
2180         }
2181 }
2182
2183 pub fn expect_payment_failed_conditions<'a, 'b, 'c, 'd, 'e>(
2184         node: &'a Node<'b, 'c, 'd>, expected_payment_hash: PaymentHash, expected_payment_failed_permanently: bool,
2185         conditions: PaymentFailedConditions<'e>
2186 ) {
2187         let events = node.node.get_and_clear_pending_events();
2188         expect_payment_failed_conditions_event(events, expected_payment_hash, expected_payment_failed_permanently, conditions);
2189 }
2190
2191 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 {
2192         let payment_id = PaymentId(origin_node.keys_manager.backing.get_secure_random_bytes());
2193         origin_node.node.send_payment_with_route(&route, our_payment_hash,
2194                 RecipientOnionFields::secret_only(our_payment_secret), payment_id).unwrap();
2195         check_added_monitors!(origin_node, expected_paths.len());
2196         pass_along_route(origin_node, expected_paths, recv_value, our_payment_hash, our_payment_secret);
2197         payment_id
2198 }
2199
2200 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> {
2201         let mut payment_event = SendEvent::from_event(ev);
2202         let mut prev_node = origin_node;
2203         let mut event = None;
2204
2205         for (idx, &node) in expected_path.iter().enumerate() {
2206                 assert_eq!(node.node.get_our_node_id(), payment_event.node_id);
2207
2208                 node.node.handle_update_add_htlc(&prev_node.node.get_our_node_id(), &payment_event.msgs[0]);
2209                 check_added_monitors!(node, 0);
2210                 commitment_signed_dance!(node, prev_node, payment_event.commitment_msg, false);
2211
2212                 expect_pending_htlcs_forwardable!(node);
2213
2214                 if idx == expected_path.len() - 1 && clear_recipient_events {
2215                         let events_2 = node.node.get_and_clear_pending_events();
2216                         if payment_claimable_expected {
2217                                 assert_eq!(events_2.len(), 1);
2218                                 match &events_2[0] {
2219                                         Event::PaymentClaimable { ref payment_hash, ref purpose, amount_msat,
2220                                                 receiver_node_id, ref via_channel_id, ref via_user_channel_id,
2221                                                 claim_deadline, onion_fields, ..
2222                                         } => {
2223                                                 assert_eq!(our_payment_hash, *payment_hash);
2224                                                 assert_eq!(node.node.get_our_node_id(), receiver_node_id.unwrap());
2225                                                 assert!(onion_fields.is_some());
2226                                                 match &purpose {
2227                                                         PaymentPurpose::InvoicePayment { payment_preimage, payment_secret, .. } => {
2228                                                                 assert_eq!(expected_preimage, *payment_preimage);
2229                                                                 assert_eq!(our_payment_secret.unwrap(), *payment_secret);
2230                                                                 assert_eq!(Some(*payment_secret), onion_fields.as_ref().unwrap().payment_secret);
2231                                                         },
2232                                                         PaymentPurpose::SpontaneousPayment(payment_preimage) => {
2233                                                                 assert_eq!(expected_preimage.unwrap(), *payment_preimage);
2234                                                                 assert_eq!(our_payment_secret, onion_fields.as_ref().unwrap().payment_secret);
2235                                                         },
2236                                                 }
2237                                                 assert_eq!(*amount_msat, recv_value);
2238                                                 assert!(node.node.list_channels().iter().any(|details| details.channel_id == via_channel_id.unwrap()));
2239                                                 assert!(node.node.list_channels().iter().any(|details| details.user_channel_id == via_user_channel_id.unwrap()));
2240                                                 assert!(claim_deadline.unwrap() > node.best_block_info().1);
2241                                         },
2242                                         _ => panic!("Unexpected event"),
2243                                 }
2244                                 event = Some(events_2[0].clone());
2245                         } else {
2246                                 assert!(events_2.is_empty());
2247                         }
2248                 } else if idx != expected_path.len() - 1 {
2249                         let mut events_2 = node.node.get_and_clear_pending_msg_events();
2250                         assert_eq!(events_2.len(), 1);
2251                         check_added_monitors!(node, 1);
2252                         payment_event = SendEvent::from_event(events_2.remove(0));
2253                         assert_eq!(payment_event.msgs.len(), 1);
2254                 }
2255
2256                 prev_node = node;
2257         }
2258         event
2259 }
2260
2261 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> {
2262         do_pass_along_path(origin_node, expected_path, recv_value, our_payment_hash, our_payment_secret, ev, payment_claimable_expected, true, expected_preimage)
2263 }
2264
2265 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) {
2266         let mut events = origin_node.node.get_and_clear_pending_msg_events();
2267         assert_eq!(events.len(), expected_route.len());
2268         for (path_idx, expected_path) in expected_route.iter().enumerate() {
2269                 let ev = remove_first_msg_event_to_node(&expected_path[0].node.get_our_node_id(), &mut events);
2270                 // Once we've gotten through all the HTLCs, the last one should result in a
2271                 // PaymentClaimable (but each previous one should not!), .
2272                 let expect_payment = path_idx == expected_route.len() - 1;
2273                 pass_along_path(origin_node, expected_path, recv_value, our_payment_hash.clone(), Some(our_payment_secret), ev, expect_payment, None);
2274         }
2275 }
2276
2277 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) {
2278         let (our_payment_preimage, our_payment_hash, our_payment_secret) = get_payment_preimage_hash!(expected_route.last().unwrap());
2279         let payment_id = send_along_route_with_secret(origin_node, route, &[expected_route], recv_value, our_payment_hash, our_payment_secret);
2280         (our_payment_preimage, our_payment_hash, our_payment_secret, payment_id)
2281 }
2282
2283 pub fn do_claim_payment_along_route<'a, 'b, 'c>(
2284         origin_node: &Node<'a, 'b, 'c>, expected_paths: &[&[&Node<'a, 'b, 'c>]], skip_last: bool,
2285         our_payment_preimage: PaymentPreimage
2286 ) -> u64 {
2287         let extra_fees = vec![0; expected_paths.len()];
2288         do_claim_payment_along_route_with_extra_penultimate_hop_fees(origin_node, expected_paths,
2289                 &extra_fees[..], skip_last, our_payment_preimage)
2290 }
2291
2292 pub fn do_claim_payment_along_route_with_extra_penultimate_hop_fees<'a, 'b, 'c>(
2293         origin_node: &Node<'a, 'b, 'c>, expected_paths: &[&[&Node<'a, 'b, 'c>]], expected_extra_fees:
2294         &[u32], skip_last: bool, our_payment_preimage: PaymentPreimage
2295 ) -> u64 {
2296         assert_eq!(expected_paths.len(), expected_extra_fees.len());
2297         for path in expected_paths.iter() {
2298                 assert_eq!(path.last().unwrap().node.get_our_node_id(), expected_paths[0].last().unwrap().node.get_our_node_id());
2299         }
2300         expected_paths[0].last().unwrap().node.claim_funds(our_payment_preimage);
2301         pass_claimed_payment_along_route(origin_node, expected_paths, expected_extra_fees, skip_last, our_payment_preimage)
2302 }
2303
2304 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 {
2305         let claim_event = expected_paths[0].last().unwrap().node.get_and_clear_pending_events();
2306         assert_eq!(claim_event.len(), 1);
2307         match claim_event[0] {
2308                 Event::PaymentClaimed {
2309                         purpose: PaymentPurpose::SpontaneousPayment(preimage),
2310                         amount_msat,
2311                         ref htlcs,
2312                         .. }
2313                 | Event::PaymentClaimed {
2314                         purpose: PaymentPurpose::InvoicePayment { payment_preimage: Some(preimage), ..},
2315                         ref htlcs,
2316                         amount_msat,
2317                         ..
2318                 } => {
2319                         assert_eq!(preimage, our_payment_preimage);
2320                         assert_eq!(htlcs.len(), expected_paths.len());  // One per path.
2321                         assert_eq!(htlcs.iter().map(|h| h.value_msat).sum::<u64>(), amount_msat);
2322                         expected_paths.iter().zip(htlcs).for_each(|(path, htlc)| check_claimed_htlc_channel(origin_node, path, htlc));
2323                 },
2324                 Event::PaymentClaimed {
2325                         purpose: PaymentPurpose::InvoicePayment { .. },
2326                         payment_hash,
2327                         amount_msat,
2328                         ref htlcs,
2329                         ..
2330                 } => {
2331                         assert_eq!(&payment_hash.0, &Sha256::hash(&our_payment_preimage.0)[..]);
2332                         assert_eq!(htlcs.len(), expected_paths.len());  // One per path.
2333                         assert_eq!(htlcs.iter().map(|h| h.value_msat).sum::<u64>(), amount_msat);
2334                         expected_paths.iter().zip(htlcs).for_each(|(path, htlc)| check_claimed_htlc_channel(origin_node, path, htlc));
2335                 }
2336                 _ => panic!(),
2337         }
2338
2339         check_added_monitors!(expected_paths[0].last().unwrap(), expected_paths.len());
2340
2341         let mut expected_total_fee_msat = 0;
2342
2343         macro_rules! msgs_from_ev {
2344                 ($ev: expr) => {
2345                         match $ev {
2346                                 &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 } } => {
2347                                         assert!(update_add_htlcs.is_empty());
2348                                         assert_eq!(update_fulfill_htlcs.len(), 1);
2349                                         assert!(update_fail_htlcs.is_empty());
2350                                         assert!(update_fail_malformed_htlcs.is_empty());
2351                                         assert!(update_fee.is_none());
2352                                         ((update_fulfill_htlcs[0].clone(), commitment_signed.clone()), node_id.clone())
2353                                 },
2354                                 _ => panic!("Unexpected event"),
2355                         }
2356                 }
2357         }
2358         let mut per_path_msgs: Vec<((msgs::UpdateFulfillHTLC, msgs::CommitmentSigned), PublicKey)> = Vec::with_capacity(expected_paths.len());
2359         let mut events = expected_paths[0].last().unwrap().node.get_and_clear_pending_msg_events();
2360         assert_eq!(events.len(), expected_paths.len());
2361
2362         if events.len() == 1 {
2363                 per_path_msgs.push(msgs_from_ev!(&events[0]));
2364         } else {
2365                 for expected_path in expected_paths.iter() {
2366                         // For MPP payments, we always want the message to the first node in the path.
2367                         let ev = remove_first_msg_event_to_node(&expected_path[0].node.get_our_node_id(), &mut events);
2368                         per_path_msgs.push(msgs_from_ev!(&ev));
2369                 }
2370         }
2371
2372         for (i, (expected_route, (path_msgs, next_hop))) in expected_paths.iter().zip(per_path_msgs.drain(..)).enumerate() {
2373                 let mut next_msgs = Some(path_msgs);
2374                 let mut expected_next_node = next_hop;
2375
2376                 macro_rules! last_update_fulfill_dance {
2377                         ($node: expr, $prev_node: expr) => {
2378                                 {
2379                                         $node.node.handle_update_fulfill_htlc(&$prev_node.node.get_our_node_id(), &next_msgs.as_ref().unwrap().0);
2380                                         check_added_monitors!($node, 0);
2381                                         assert!($node.node.get_and_clear_pending_msg_events().is_empty());
2382                                         commitment_signed_dance!($node, $prev_node, next_msgs.as_ref().unwrap().1, false);
2383                                 }
2384                         }
2385                 }
2386                 macro_rules! mid_update_fulfill_dance {
2387                         ($idx: expr, $node: expr, $prev_node: expr, $next_node: expr, $new_msgs: expr) => {
2388                                 {
2389                                         $node.node.handle_update_fulfill_htlc(&$prev_node.node.get_our_node_id(), &next_msgs.as_ref().unwrap().0);
2390                                         let mut fee = {
2391                                                 let per_peer_state = $node.node.per_peer_state.read().unwrap();
2392                                                 let peer_state = per_peer_state.get(&$prev_node.node.get_our_node_id())
2393                                                         .unwrap().lock().unwrap();
2394                                                 let channel = peer_state.channel_by_id.get(&next_msgs.as_ref().unwrap().0.channel_id).unwrap();
2395                                                 if let Some(prev_config) = channel.context().prev_config() {
2396                                                         prev_config.forwarding_fee_base_msat
2397                                                 } else {
2398                                                         channel.context().config().forwarding_fee_base_msat
2399                                                 }
2400                                         };
2401                                         if $idx == 1 { fee += expected_extra_fees[i]; }
2402                                         expect_payment_forwarded!($node, $next_node, $prev_node, Some(fee as u64), false, false);
2403                                         expected_total_fee_msat += fee as u64;
2404                                         check_added_monitors!($node, 1);
2405                                         let new_next_msgs = if $new_msgs {
2406                                                 let events = $node.node.get_and_clear_pending_msg_events();
2407                                                 assert_eq!(events.len(), 1);
2408                                                 let (res, nexthop) = msgs_from_ev!(&events[0]);
2409                                                 expected_next_node = nexthop;
2410                                                 Some(res)
2411                                         } else {
2412                                                 assert!($node.node.get_and_clear_pending_msg_events().is_empty());
2413                                                 None
2414                                         };
2415                                         commitment_signed_dance!($node, $prev_node, next_msgs.as_ref().unwrap().1, false);
2416                                         next_msgs = new_next_msgs;
2417                                 }
2418                         }
2419                 }
2420
2421                 let mut prev_node = expected_route.last().unwrap();
2422                 for (idx, node) in expected_route.iter().rev().enumerate().skip(1) {
2423                         assert_eq!(expected_next_node, node.node.get_our_node_id());
2424                         let update_next_msgs = !skip_last || idx != expected_route.len() - 1;
2425                         if next_msgs.is_some() {
2426                                 // Since we are traversing in reverse, next_node is actually the previous node
2427                                 let next_node: &Node;
2428                                 if idx == expected_route.len() - 1 {
2429                                         next_node = origin_node;
2430                                 } else {
2431                                         next_node = expected_route[expected_route.len() - 1 - idx - 1];
2432                                 }
2433                                 mid_update_fulfill_dance!(idx, node, prev_node, next_node, update_next_msgs);
2434                         } else {
2435                                 assert!(!update_next_msgs);
2436                                 assert!(node.node.get_and_clear_pending_msg_events().is_empty());
2437                         }
2438                         if !skip_last && idx == expected_route.len() - 1 {
2439                                 assert_eq!(expected_next_node, origin_node.node.get_our_node_id());
2440                         }
2441
2442                         prev_node = node;
2443                 }
2444
2445                 if !skip_last {
2446                         last_update_fulfill_dance!(origin_node, expected_route.first().unwrap());
2447                 }
2448         }
2449
2450         // Ensure that claim_funds is idempotent.
2451         expected_paths[0].last().unwrap().node.claim_funds(our_payment_preimage);
2452         assert!(expected_paths[0].last().unwrap().node.get_and_clear_pending_msg_events().is_empty());
2453         check_added_monitors!(expected_paths[0].last().unwrap(), 0);
2454
2455         expected_total_fee_msat
2456 }
2457 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) {
2458         let expected_total_fee_msat = do_claim_payment_along_route(origin_node, expected_paths, skip_last, our_payment_preimage);
2459         if !skip_last {
2460                 expect_payment_sent!(origin_node, our_payment_preimage, Some(expected_total_fee_msat));
2461         }
2462 }
2463
2464 pub fn claim_payment<'a, 'b, 'c>(origin_node: &Node<'a, 'b, 'c>, expected_route: &[&Node<'a, 'b, 'c>], our_payment_preimage: PaymentPreimage) {
2465         claim_payment_along_route(origin_node, &[expected_route], false, our_payment_preimage);
2466 }
2467
2468 pub const TEST_FINAL_CLTV: u32 = 70;
2469
2470 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) {
2471         let payment_params = PaymentParameters::from_node_id(expected_route.last().unwrap().node.get_our_node_id(), TEST_FINAL_CLTV)
2472                 .with_bolt11_features(expected_route.last().unwrap().node.invoice_features()).unwrap();
2473         let route_params = RouteParameters::from_payment_params_and_value(payment_params, recv_value);
2474         let route = get_route(origin_node, &route_params).unwrap();
2475         assert_eq!(route.paths.len(), 1);
2476         assert_eq!(route.paths[0].hops.len(), expected_route.len());
2477         for (node, hop) in expected_route.iter().zip(route.paths[0].hops.iter()) {
2478                 assert_eq!(hop.pubkey, node.node.get_our_node_id());
2479         }
2480
2481         let res = send_along_route(origin_node, route, expected_route, recv_value);
2482         (res.0, res.1, res.2, res.3)
2483 }
2484
2485 pub fn route_over_limit<'a, 'b, 'c>(origin_node: &Node<'a, 'b, 'c>, expected_route: &[&Node<'a, 'b, 'c>], recv_value: u64)  {
2486         let payment_params = PaymentParameters::from_node_id(expected_route.last().unwrap().node.get_our_node_id(), TEST_FINAL_CLTV)
2487                 .with_bolt11_features(expected_route.last().unwrap().node.invoice_features()).unwrap();
2488         let route_params = RouteParameters::from_payment_params_and_value(payment_params, recv_value);
2489         let network_graph = origin_node.network_graph.read_only();
2490         let scorer = test_utils::TestScorer::new();
2491         let seed = [0u8; 32];
2492         let keys_manager = test_utils::TestKeysInterface::new(&seed, Network::Testnet);
2493         let random_seed_bytes = keys_manager.get_secure_random_bytes();
2494         let route = router::get_route(&origin_node.node.get_our_node_id(), &route_params, &network_graph,
2495                 None, origin_node.logger, &scorer, &(), &random_seed_bytes).unwrap();
2496         assert_eq!(route.paths.len(), 1);
2497         assert_eq!(route.paths[0].hops.len(), expected_route.len());
2498         for (node, hop) in expected_route.iter().zip(route.paths[0].hops.iter()) {
2499                 assert_eq!(hop.pubkey, node.node.get_our_node_id());
2500         }
2501
2502         let (_, our_payment_hash, our_payment_secret) = get_payment_preimage_hash!(expected_route.last().unwrap());
2503         unwrap_send_err!(origin_node.node.send_payment_with_route(&route, our_payment_hash,
2504                         RecipientOnionFields::secret_only(our_payment_secret), PaymentId(our_payment_hash.0)),
2505                 true, APIError::ChannelUnavailable { ref err },
2506                 assert!(err.contains("Cannot send value that would put us over the max HTLC value in flight our peer will accept")));
2507 }
2508
2509 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) {
2510         let res = route_payment(&origin, expected_route, recv_value);
2511         claim_payment(&origin, expected_route, res.0);
2512         res
2513 }
2514
2515 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) {
2516         for path in expected_paths.iter() {
2517                 assert_eq!(path.last().unwrap().node.get_our_node_id(), expected_paths[0].last().unwrap().node.get_our_node_id());
2518         }
2519         expected_paths[0].last().unwrap().node.fail_htlc_backwards(&our_payment_hash);
2520         let expected_destinations: Vec<HTLCDestination> = repeat(HTLCDestination::FailedPayment { payment_hash: our_payment_hash }).take(expected_paths.len()).collect();
2521         expect_pending_htlcs_forwardable_and_htlc_handling_failed!(expected_paths[0].last().unwrap(), expected_destinations);
2522
2523         pass_failed_payment_back(origin_node, expected_paths, skip_last, our_payment_hash, PaymentFailureReason::RecipientRejected);
2524 }
2525
2526 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) {
2527         let mut expected_paths: Vec<_> = expected_paths_slice.iter().collect();
2528         check_added_monitors!(expected_paths[0].last().unwrap(), expected_paths.len());
2529
2530         let mut per_path_msgs: Vec<((msgs::UpdateFailHTLC, msgs::CommitmentSigned), PublicKey)> = Vec::with_capacity(expected_paths.len());
2531         let events = expected_paths[0].last().unwrap().node.get_and_clear_pending_msg_events();
2532         assert_eq!(events.len(), expected_paths.len());
2533         for ev in events.iter() {
2534                 let (update_fail, commitment_signed, node_id) = match ev {
2535                         &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 } } => {
2536                                 assert!(update_add_htlcs.is_empty());
2537                                 assert!(update_fulfill_htlcs.is_empty());
2538                                 assert_eq!(update_fail_htlcs.len(), 1);
2539                                 assert!(update_fail_malformed_htlcs.is_empty());
2540                                 assert!(update_fee.is_none());
2541                                 (update_fail_htlcs[0].clone(), commitment_signed.clone(), node_id.clone())
2542                         },
2543                         _ => panic!("Unexpected event"),
2544                 };
2545                 per_path_msgs.push(((update_fail, commitment_signed), node_id));
2546         }
2547         per_path_msgs.sort_unstable_by(|(_, node_id_a), (_, node_id_b)| node_id_a.cmp(node_id_b));
2548         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()));
2549
2550         for (i, (expected_route, (path_msgs, next_hop))) in expected_paths.iter().zip(per_path_msgs.drain(..)).enumerate() {
2551                 let mut next_msgs = Some(path_msgs);
2552                 let mut expected_next_node = next_hop;
2553                 let mut prev_node = expected_route.last().unwrap();
2554
2555                 for (idx, node) in expected_route.iter().rev().enumerate().skip(1) {
2556                         assert_eq!(expected_next_node, node.node.get_our_node_id());
2557                         let update_next_node = !skip_last || idx != expected_route.len() - 1;
2558                         if next_msgs.is_some() {
2559                                 node.node.handle_update_fail_htlc(&prev_node.node.get_our_node_id(), &next_msgs.as_ref().unwrap().0);
2560                                 commitment_signed_dance!(node, prev_node, next_msgs.as_ref().unwrap().1, update_next_node);
2561                                 if !update_next_node {
2562                                         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 }]);
2563                                 }
2564                         }
2565                         let events = node.node.get_and_clear_pending_msg_events();
2566                         if update_next_node {
2567                                 assert_eq!(events.len(), 1);
2568                                 match events[0] {
2569                                         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 } } => {
2570                                                 assert!(update_add_htlcs.is_empty());
2571                                                 assert!(update_fulfill_htlcs.is_empty());
2572                                                 assert_eq!(update_fail_htlcs.len(), 1);
2573                                                 assert!(update_fail_malformed_htlcs.is_empty());
2574                                                 assert!(update_fee.is_none());
2575                                                 expected_next_node = node_id.clone();
2576                                                 next_msgs = Some((update_fail_htlcs[0].clone(), commitment_signed.clone()));
2577                                         },
2578                                         _ => panic!("Unexpected event"),
2579                                 }
2580                         } else {
2581                                 assert!(events.is_empty());
2582                         }
2583                         if !skip_last && idx == expected_route.len() - 1 {
2584                                 assert_eq!(expected_next_node, origin_node.node.get_our_node_id());
2585                         }
2586
2587                         prev_node = node;
2588                 }
2589
2590                 if !skip_last {
2591                         let prev_node = expected_route.first().unwrap();
2592                         origin_node.node.handle_update_fail_htlc(&prev_node.node.get_our_node_id(), &next_msgs.as_ref().unwrap().0);
2593                         check_added_monitors!(origin_node, 0);
2594                         assert!(origin_node.node.get_and_clear_pending_msg_events().is_empty());
2595                         commitment_signed_dance!(origin_node, prev_node, next_msgs.as_ref().unwrap().1, false);
2596                         let events = origin_node.node.get_and_clear_pending_events();
2597                         if i == expected_paths.len() - 1 { assert_eq!(events.len(), 2); } else { assert_eq!(events.len(), 1); }
2598
2599                         let expected_payment_id = match events[0] {
2600                                 Event::PaymentPathFailed { payment_hash, payment_failed_permanently, ref path, ref payment_id, .. } => {
2601                                         assert_eq!(payment_hash, our_payment_hash);
2602                                         assert!(payment_failed_permanently);
2603                                         for (idx, hop) in expected_route.iter().enumerate() {
2604                                                 assert_eq!(hop.node.get_our_node_id(), path.hops[idx].pubkey);
2605                                         }
2606                                         payment_id.unwrap()
2607                                 },
2608                                 _ => panic!("Unexpected event"),
2609                         };
2610                         if i == expected_paths.len() - 1 {
2611                                 match events[1] {
2612                                         Event::PaymentFailed { ref payment_hash, ref payment_id, ref reason } => {
2613                                                 assert_eq!(*payment_hash, our_payment_hash, "unexpected second payment_hash");
2614                                                 assert_eq!(*payment_id, expected_payment_id);
2615                                                 assert_eq!(reason.unwrap(), expected_fail_reason);
2616                                         }
2617                                         _ => panic!("Unexpected second event"),
2618                                 }
2619                         }
2620                 }
2621         }
2622
2623         // Ensure that fail_htlc_backwards is idempotent.
2624         expected_paths[0].last().unwrap().node.fail_htlc_backwards(&our_payment_hash);
2625         assert!(expected_paths[0].last().unwrap().node.get_and_clear_pending_events().is_empty());
2626         assert!(expected_paths[0].last().unwrap().node.get_and_clear_pending_msg_events().is_empty());
2627         check_added_monitors!(expected_paths[0].last().unwrap(), 0);
2628 }
2629
2630 pub fn fail_payment<'a, 'b, 'c>(origin_node: &Node<'a, 'b, 'c>, expected_path: &[&Node<'a, 'b, 'c>], our_payment_hash: PaymentHash)  {
2631         fail_payment_along_route(origin_node, &[&expected_path[..]], false, our_payment_hash);
2632 }
2633
2634 pub fn create_chanmon_cfgs(node_count: usize) -> Vec<TestChanMonCfg> {
2635         let mut chan_mon_cfgs = Vec::new();
2636         for i in 0..node_count {
2637                 let tx_broadcaster = test_utils::TestBroadcaster::new(Network::Testnet);
2638                 let fee_estimator = test_utils::TestFeeEstimator { sat_per_kw: Mutex::new(253) };
2639                 let chain_source = test_utils::TestChainSource::new(Network::Testnet);
2640                 let logger = test_utils::TestLogger::with_id(format!("node {}", i));
2641                 let persister = test_utils::TestPersister::new();
2642                 let seed = [i as u8; 32];
2643                 let keys_manager = test_utils::TestKeysInterface::new(&seed, Network::Testnet);
2644                 let scorer = RwLock::new(test_utils::TestScorer::new());
2645
2646                 chan_mon_cfgs.push(TestChanMonCfg { tx_broadcaster, fee_estimator, chain_source, logger, persister, keys_manager, scorer });
2647         }
2648
2649         chan_mon_cfgs
2650 }
2651
2652 pub fn create_node_cfgs<'a>(node_count: usize, chanmon_cfgs: &'a Vec<TestChanMonCfg>) -> Vec<NodeCfg<'a>> {
2653         create_node_cfgs_with_persisters(node_count, chanmon_cfgs, chanmon_cfgs.iter().map(|c| &c.persister).collect())
2654 }
2655
2656 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>> {
2657         let mut nodes = Vec::new();
2658
2659         for i in 0..node_count {
2660                 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);
2661                 let network_graph = Arc::new(NetworkGraph::new(Network::Testnet, &chanmon_cfgs[i].logger));
2662                 let seed = [i as u8; 32];
2663                 nodes.push(NodeCfg {
2664                         chain_source: &chanmon_cfgs[i].chain_source,
2665                         logger: &chanmon_cfgs[i].logger,
2666                         tx_broadcaster: &chanmon_cfgs[i].tx_broadcaster,
2667                         fee_estimator: &chanmon_cfgs[i].fee_estimator,
2668                         router: test_utils::TestRouter::new(network_graph.clone(), &chanmon_cfgs[i].scorer),
2669                         chain_monitor,
2670                         keys_manager: &chanmon_cfgs[i].keys_manager,
2671                         node_seed: seed,
2672                         network_graph,
2673                         override_init_features: Rc::new(RefCell::new(None)),
2674                 });
2675         }
2676
2677         nodes
2678 }
2679
2680 pub fn test_default_channel_config() -> UserConfig {
2681         let mut default_config = UserConfig::default();
2682         // Set cltv_expiry_delta slightly lower to keep the final CLTV values inside one byte in our
2683         // tests so that our script-length checks don't fail (see ACCEPTED_HTLC_SCRIPT_WEIGHT).
2684         default_config.channel_config.cltv_expiry_delta = MIN_CLTV_EXPIRY_DELTA;
2685         default_config.channel_handshake_config.announced_channel = true;
2686         default_config.channel_handshake_limits.force_announced_channel_preference = false;
2687         // When most of our tests were written, the default HTLC minimum was fixed at 1000.
2688         // It now defaults to 1, so we simply set it to the expected value here.
2689         default_config.channel_handshake_config.our_htlc_minimum_msat = 1000;
2690         // When most of our tests were written, we didn't have the notion of a `max_dust_htlc_exposure_msat`,
2691         // to avoid interfering with tests we bump it to 50_000_000 msat (assuming the default test
2692         // feerate of 253).
2693         default_config.channel_config.max_dust_htlc_exposure =
2694                 MaxDustHTLCExposure::FeeRateMultiplier(50_000_000 / 253);
2695         default_config
2696 }
2697
2698 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>> {
2699         let mut chanmgrs = Vec::new();
2700         for i in 0..node_count {
2701                 let network = Network::Testnet;
2702                 let genesis_block = bitcoin::blockdata::constants::genesis_block(network);
2703                 let params = ChainParameters {
2704                         network,
2705                         best_block: BestBlock::from_network(network),
2706                 };
2707                 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,
2708                         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);
2709                 chanmgrs.push(node);
2710         }
2711
2712         chanmgrs
2713 }
2714
2715 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>> {
2716         let mut nodes = Vec::new();
2717         let chan_count = Rc::new(RefCell::new(0));
2718         let payment_count = Rc::new(RefCell::new(0));
2719         let connect_style = Rc::new(RefCell::new(ConnectStyle::random_style()));
2720
2721         for i in 0..node_count {
2722                 let gossip_sync = P2PGossipSync::new(cfgs[i].network_graph.as_ref(), None, cfgs[i].logger);
2723                 let wallet_source = Arc::new(test_utils::TestWalletSource::new(SecretKey::from_slice(&[i as u8 + 1; 32]).unwrap()));
2724                 nodes.push(Node{
2725                         chain_source: cfgs[i].chain_source, tx_broadcaster: cfgs[i].tx_broadcaster,
2726                         fee_estimator: cfgs[i].fee_estimator, router: &cfgs[i].router,
2727                         chain_monitor: &cfgs[i].chain_monitor, keys_manager: &cfgs[i].keys_manager,
2728                         node: &chan_mgrs[i], network_graph: cfgs[i].network_graph.as_ref(), gossip_sync,
2729                         node_seed: cfgs[i].node_seed, network_chan_count: chan_count.clone(),
2730                         network_payment_count: payment_count.clone(), logger: cfgs[i].logger,
2731                         blocks: Arc::clone(&cfgs[i].tx_broadcaster.blocks),
2732                         connect_style: Rc::clone(&connect_style),
2733                         override_init_features: Rc::clone(&cfgs[i].override_init_features),
2734                         wallet_source: Arc::clone(&wallet_source),
2735                         bump_tx_handler: BumpTransactionEventHandler::new(
2736                                 cfgs[i].tx_broadcaster, Arc::new(Wallet::new(Arc::clone(&wallet_source), cfgs[i].logger)),
2737                                 &cfgs[i].keys_manager, cfgs[i].logger,
2738                         ),
2739                 })
2740         }
2741
2742         for i in 0..node_count {
2743                 for j in (i+1)..node_count {
2744                         nodes[i].node.peer_connected(&nodes[j].node.get_our_node_id(), &msgs::Init {
2745                                 features: nodes[j].override_init_features.borrow().clone().unwrap_or_else(|| nodes[j].node.init_features()),
2746                                 networks: None,
2747                                 remote_network_address: None,
2748                         }, true).unwrap();
2749                         nodes[j].node.peer_connected(&nodes[i].node.get_our_node_id(), &msgs::Init {
2750                                 features: nodes[i].override_init_features.borrow().clone().unwrap_or_else(|| nodes[i].node.init_features()),
2751                                 networks: None,
2752                                 remote_network_address: None,
2753                         }, false).unwrap();
2754                 }
2755         }
2756
2757         nodes
2758 }
2759
2760 // Note that the following only works for CLTV values up to 128
2761 pub const ACCEPTED_HTLC_SCRIPT_WEIGHT: usize = 137; //Here we have a diff due to HTLC CLTV expiry being < 2^15 in test
2762
2763 #[derive(PartialEq)]
2764 pub enum HTLCType { NONE, TIMEOUT, SUCCESS }
2765 /// Tests that the given node has broadcast transactions for the given Channel
2766 ///
2767 /// First checks that the latest holder commitment tx has been broadcast, unless an explicit
2768 /// commitment_tx is provided, which may be used to test that a remote commitment tx was
2769 /// broadcast and the revoked outputs were claimed.
2770 ///
2771 /// Next tests that there is (or is not) a transaction that spends the commitment transaction
2772 /// that appears to be the type of HTLC transaction specified in has_htlc_tx.
2773 ///
2774 /// All broadcast transactions must be accounted for in one of the above three types of we'll
2775 /// also fail.
2776 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>  {
2777         let mut node_txn = node.tx_broadcaster.txn_broadcasted.lock().unwrap();
2778         let mut txn_seen = HashSet::new();
2779         node_txn.retain(|tx| txn_seen.insert(tx.txid()));
2780         assert!(node_txn.len() >= if commitment_tx.is_some() { 0 } else { 1 } + if has_htlc_tx == HTLCType::NONE { 0 } else { 1 });
2781
2782         let mut res = Vec::with_capacity(2);
2783         node_txn.retain(|tx| {
2784                 if tx.input.len() == 1 && tx.input[0].previous_output.txid == chan.3.txid() {
2785                         check_spends!(tx, chan.3);
2786                         if commitment_tx.is_none() {
2787                                 res.push(tx.clone());
2788                         }
2789                         false
2790                 } else { true }
2791         });
2792         if let Some(explicit_tx) = commitment_tx {
2793                 res.push(explicit_tx.clone());
2794         }
2795
2796         assert_eq!(res.len(), 1);
2797
2798         if has_htlc_tx != HTLCType::NONE {
2799                 node_txn.retain(|tx| {
2800                         if tx.input.len() == 1 && tx.input[0].previous_output.txid == res[0].txid() {
2801                                 check_spends!(tx, res[0]);
2802                                 if has_htlc_tx == HTLCType::TIMEOUT {
2803                                         assert!(tx.lock_time.0 != 0);
2804                                 } else {
2805                                         assert!(tx.lock_time.0 == 0);
2806                                 }
2807                                 res.push(tx.clone());
2808                                 false
2809                         } else { true }
2810                 });
2811                 assert!(res.len() == 2 || res.len() == 3);
2812                 if res.len() == 3 {
2813                         assert_eq!(res[1], res[2]);
2814                 }
2815         }
2816
2817         assert!(node_txn.is_empty());
2818         res
2819 }
2820
2821 /// Tests that the given node has broadcast a claim transaction against the provided revoked
2822 /// HTLC transaction.
2823 pub fn test_revoked_htlc_claim_txn_broadcast<'a, 'b, 'c>(node: &Node<'a, 'b, 'c>, revoked_tx: Transaction, commitment_revoked_tx: Transaction)  {
2824         let mut node_txn = node.tx_broadcaster.txn_broadcasted.lock().unwrap();
2825         // We may issue multiple claiming transaction on revoked outputs due to block rescan
2826         // for revoked htlc outputs
2827         if node_txn.len() != 1 && node_txn.len() != 2 && node_txn.len() != 3 { assert!(false); }
2828         node_txn.retain(|tx| {
2829                 if tx.input.len() == 1 && tx.input[0].previous_output.txid == revoked_tx.txid() {
2830                         check_spends!(tx, revoked_tx);
2831                         false
2832                 } else { true }
2833         });
2834         node_txn.retain(|tx| {
2835                 check_spends!(tx, commitment_revoked_tx);
2836                 false
2837         });
2838         assert!(node_txn.is_empty());
2839 }
2840
2841 pub fn check_preimage_claim<'a, 'b, 'c>(node: &Node<'a, 'b, 'c>, prev_txn: &Vec<Transaction>) -> Vec<Transaction>  {
2842         let mut node_txn = node.tx_broadcaster.txn_broadcasted.lock().unwrap();
2843         let mut txn_seen = HashSet::new();
2844         node_txn.retain(|tx| txn_seen.insert(tx.txid()));
2845
2846         let mut found_prev = false;
2847         for prev_tx in prev_txn {
2848                 for tx in &*node_txn {
2849                         if tx.input[0].previous_output.txid == prev_tx.txid() {
2850                                 check_spends!(tx, prev_tx);
2851                                 let mut iter = tx.input[0].witness.iter();
2852                                 iter.next().expect("expected 3 witness items");
2853                                 iter.next().expect("expected 3 witness items");
2854                                 assert!(iter.next().expect("expected 3 witness items").len() > 106); // must spend an htlc output
2855                                 assert_eq!(tx.input.len(), 1); // must spend a commitment tx
2856
2857                                 found_prev = true;
2858                                 break;
2859                         }
2860                 }
2861         }
2862         assert!(found_prev);
2863
2864         let mut res = Vec::new();
2865         mem::swap(&mut *node_txn, &mut res);
2866         res
2867 }
2868
2869 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)  {
2870         let events_1 = nodes[a].node.get_and_clear_pending_msg_events();
2871         assert_eq!(events_1.len(), 2);
2872         let as_update = match events_1[0] {
2873                 MessageSendEvent::BroadcastChannelUpdate { ref msg } => {
2874                         msg.clone()
2875                 },
2876                 _ => panic!("Unexpected event"),
2877         };
2878         match events_1[1] {
2879                 MessageSendEvent::HandleError { node_id, action: msgs::ErrorAction::SendErrorMessage { ref msg } } => {
2880                         assert_eq!(node_id, nodes[b].node.get_our_node_id());
2881                         assert_eq!(msg.data, expected_error);
2882                         if needs_err_handle {
2883                                 nodes[b].node.handle_error(&nodes[a].node.get_our_node_id(), msg);
2884                         }
2885                 },
2886                 _ => panic!("Unexpected event"),
2887         }
2888
2889         let events_2 = nodes[b].node.get_and_clear_pending_msg_events();
2890         assert_eq!(events_2.len(), if needs_err_handle { 1 } else { 2 });
2891         let bs_update = match events_2[0] {
2892                 MessageSendEvent::BroadcastChannelUpdate { ref msg } => {
2893                         msg.clone()
2894                 },
2895                 _ => panic!("Unexpected event"),
2896         };
2897         if !needs_err_handle {
2898                 match events_2[1] {
2899                         MessageSendEvent::HandleError { node_id, action: msgs::ErrorAction::SendErrorMessage { ref msg } } => {
2900                                 assert_eq!(node_id, nodes[a].node.get_our_node_id());
2901                                 assert_eq!(msg.data, expected_error);
2902                         },
2903                         _ => panic!("Unexpected event"),
2904                 }
2905         }
2906
2907         for node in nodes {
2908                 node.gossip_sync.handle_channel_update(&as_update).unwrap();
2909                 node.gossip_sync.handle_channel_update(&bs_update).unwrap();
2910         }
2911 }
2912
2913 pub fn get_announce_close_broadcast_events<'a, 'b, 'c>(nodes: &Vec<Node<'a, 'b, 'c>>, a: usize, b: usize)  {
2914         handle_announce_close_broadcast_events(nodes, a, b, false, "Channel closed because commitment or closing transaction was confirmed on chain.");
2915 }
2916
2917 #[cfg(test)]
2918 macro_rules! get_channel_value_stat {
2919         ($node: expr, $counterparty_node: expr, $channel_id: expr) => {{
2920                 let peer_state_lock = $node.node.per_peer_state.read().unwrap();
2921                 let chan_lock = peer_state_lock.get(&$counterparty_node.node.get_our_node_id()).unwrap().lock().unwrap();
2922                 let chan = chan_lock.channel_by_id.get(&$channel_id).map(
2923                         |phase| if let ChannelPhase::Funded(chan) = phase { Some(chan) } else { None }
2924                 ).flatten().unwrap();
2925                 chan.get_value_stat()
2926         }}
2927 }
2928
2929 macro_rules! get_chan_reestablish_msgs {
2930         ($src_node: expr, $dst_node: expr) => {
2931                 {
2932                         let mut announcements = $crate::prelude::HashSet::new();
2933                         let mut res = Vec::with_capacity(1);
2934                         for msg in $src_node.node.get_and_clear_pending_msg_events() {
2935                                 if let MessageSendEvent::SendChannelReestablish { ref node_id, ref msg } = msg {
2936                                         assert_eq!(*node_id, $dst_node.node.get_our_node_id());
2937                                         res.push(msg.clone());
2938                                 } else if let MessageSendEvent::SendChannelAnnouncement { ref node_id, ref msg, .. } = msg {
2939                                         assert_eq!(*node_id, $dst_node.node.get_our_node_id());
2940                                         announcements.insert(msg.contents.short_channel_id);
2941                                 } else {
2942                                         panic!("Unexpected event")
2943                                 }
2944                         }
2945                         assert!(announcements.is_empty());
2946                         res
2947                 }
2948         }
2949 }
2950
2951 macro_rules! handle_chan_reestablish_msgs {
2952         ($src_node: expr, $dst_node: expr) => {
2953                 {
2954                         let msg_events = $src_node.node.get_and_clear_pending_msg_events();
2955                         let mut idx = 0;
2956                         let channel_ready = if let Some(&MessageSendEvent::SendChannelReady { ref node_id, ref msg }) = msg_events.get(0) {
2957                                 idx += 1;
2958                                 assert_eq!(*node_id, $dst_node.node.get_our_node_id());
2959                                 Some(msg.clone())
2960                         } else {
2961                                 None
2962                         };
2963
2964                         if let Some(&MessageSendEvent::SendAnnouncementSignatures { ref node_id, msg: _ }) = msg_events.get(idx) {
2965                                 idx += 1;
2966                                 assert_eq!(*node_id, $dst_node.node.get_our_node_id());
2967                         }
2968
2969                         let mut had_channel_update = false; // ChannelUpdate may be now or later, but not both
2970                         if let Some(&MessageSendEvent::SendChannelUpdate { ref node_id, .. }) = msg_events.get(idx) {
2971                                 assert_eq!(*node_id, $dst_node.node.get_our_node_id());
2972                                 idx += 1;
2973                                 had_channel_update = true;
2974                         }
2975
2976                         let mut revoke_and_ack = None;
2977                         let mut commitment_update = None;
2978                         let order = if let Some(ev) = msg_events.get(idx) {
2979                                 match ev {
2980                                         &MessageSendEvent::SendRevokeAndACK { ref node_id, ref msg } => {
2981                                                 assert_eq!(*node_id, $dst_node.node.get_our_node_id());
2982                                                 revoke_and_ack = Some(msg.clone());
2983                                                 idx += 1;
2984                                                 RAACommitmentOrder::RevokeAndACKFirst
2985                                         },
2986                                         &MessageSendEvent::UpdateHTLCs { ref node_id, ref updates } => {
2987                                                 assert_eq!(*node_id, $dst_node.node.get_our_node_id());
2988                                                 commitment_update = Some(updates.clone());
2989                                                 idx += 1;
2990                                                 RAACommitmentOrder::CommitmentFirst
2991                                         },
2992                                         _ => RAACommitmentOrder::CommitmentFirst,
2993                                 }
2994                         } else {
2995                                 RAACommitmentOrder::CommitmentFirst
2996                         };
2997
2998                         if let Some(ev) = msg_events.get(idx) {
2999                                 match ev {
3000                                         &MessageSendEvent::SendRevokeAndACK { ref node_id, ref msg } => {
3001                                                 assert_eq!(*node_id, $dst_node.node.get_our_node_id());
3002                                                 assert!(revoke_and_ack.is_none());
3003                                                 revoke_and_ack = Some(msg.clone());
3004                                                 idx += 1;
3005                                         },
3006                                         &MessageSendEvent::UpdateHTLCs { ref node_id, ref updates } => {
3007                                                 assert_eq!(*node_id, $dst_node.node.get_our_node_id());
3008                                                 assert!(commitment_update.is_none());
3009                                                 commitment_update = Some(updates.clone());
3010                                                 idx += 1;
3011                                         },
3012                                         _ => {},
3013                                 }
3014                         }
3015
3016                         if let Some(&MessageSendEvent::SendChannelUpdate { ref node_id, .. }) = msg_events.get(idx) {
3017                                 assert_eq!(*node_id, $dst_node.node.get_our_node_id());
3018                                 idx += 1;
3019                                 assert!(!had_channel_update);
3020                         }
3021
3022                         assert_eq!(msg_events.len(), idx);
3023
3024                         (channel_ready, revoke_and_ack, commitment_update, order)
3025                 }
3026         }
3027 }
3028
3029 pub struct ReconnectArgs<'a, 'b, 'c, 'd> {
3030         pub node_a: &'a Node<'b, 'c, 'd>,
3031         pub node_b: &'a Node<'b, 'c, 'd>,
3032         pub send_channel_ready: (bool, bool),
3033         pub pending_htlc_adds: (i64, i64),
3034         pub pending_htlc_claims: (usize, usize),
3035         pub pending_htlc_fails: (usize, usize),
3036         pub pending_cell_htlc_claims: (usize, usize),
3037         pub pending_cell_htlc_fails: (usize, usize),
3038         pub pending_raa: (bool, bool),
3039 }
3040
3041 impl<'a, 'b, 'c, 'd> ReconnectArgs<'a, 'b, 'c, 'd> {
3042         pub fn new(node_a: &'a Node<'b, 'c, 'd>, node_b: &'a Node<'b, 'c, 'd>) -> Self {
3043                 Self {
3044                         node_a,
3045                         node_b,
3046                         send_channel_ready: (false, false),
3047                         pending_htlc_adds: (0, 0),
3048                         pending_htlc_claims: (0, 0),
3049                         pending_htlc_fails: (0, 0),
3050                         pending_cell_htlc_claims: (0, 0),
3051                         pending_cell_htlc_fails: (0, 0),
3052                         pending_raa: (false, false),
3053                 }
3054         }
3055 }
3056
3057 /// pending_htlc_adds includes both the holding cell and in-flight update_add_htlcs, whereas
3058 /// for claims/fails they are separated out.
3059 pub fn reconnect_nodes<'a, 'b, 'c, 'd>(args: ReconnectArgs<'a, 'b, 'c, 'd>) {
3060         let ReconnectArgs {
3061                 node_a, node_b, send_channel_ready, pending_htlc_adds, pending_htlc_claims, pending_htlc_fails,
3062                 pending_cell_htlc_claims, pending_cell_htlc_fails, pending_raa
3063         } = args;
3064         node_a.node.peer_connected(&node_b.node.get_our_node_id(), &msgs::Init {
3065                 features: node_b.node.init_features(), networks: None, remote_network_address: None
3066         }, true).unwrap();
3067         let reestablish_1 = get_chan_reestablish_msgs!(node_a, node_b);
3068         node_b.node.peer_connected(&node_a.node.get_our_node_id(), &msgs::Init {
3069                 features: node_a.node.init_features(), networks: None, remote_network_address: None
3070         }, false).unwrap();
3071         let reestablish_2 = get_chan_reestablish_msgs!(node_b, node_a);
3072
3073         if send_channel_ready.0 {
3074                 // If a expects a channel_ready, it better not think it has received a revoke_and_ack
3075                 // from b
3076                 for reestablish in reestablish_1.iter() {
3077                         assert_eq!(reestablish.next_remote_commitment_number, 0);
3078                 }
3079         }
3080         if send_channel_ready.1 {
3081                 // If b expects a channel_ready, it better not think it has received a revoke_and_ack
3082                 // from a
3083                 for reestablish in reestablish_2.iter() {
3084                         assert_eq!(reestablish.next_remote_commitment_number, 0);
3085                 }
3086         }
3087         if send_channel_ready.0 || send_channel_ready.1 {
3088                 // If we expect any channel_ready's, both sides better have set
3089                 // next_holder_commitment_number to 1
3090                 for reestablish in reestablish_1.iter() {
3091                         assert_eq!(reestablish.next_local_commitment_number, 1);
3092                 }
3093                 for reestablish in reestablish_2.iter() {
3094                         assert_eq!(reestablish.next_local_commitment_number, 1);
3095                 }
3096         }
3097
3098         let mut resp_1 = Vec::new();
3099         for msg in reestablish_1 {
3100                 node_b.node.handle_channel_reestablish(&node_a.node.get_our_node_id(), &msg);
3101                 resp_1.push(handle_chan_reestablish_msgs!(node_b, node_a));
3102         }
3103         if pending_cell_htlc_claims.0 != 0 || pending_cell_htlc_fails.0 != 0 {
3104                 check_added_monitors!(node_b, 1);
3105         } else {
3106                 check_added_monitors!(node_b, 0);
3107         }
3108
3109         let mut resp_2 = Vec::new();
3110         for msg in reestablish_2 {
3111                 node_a.node.handle_channel_reestablish(&node_b.node.get_our_node_id(), &msg);
3112                 resp_2.push(handle_chan_reestablish_msgs!(node_a, node_b));
3113         }
3114         if pending_cell_htlc_claims.1 != 0 || pending_cell_htlc_fails.1 != 0 {
3115                 check_added_monitors!(node_a, 1);
3116         } else {
3117                 check_added_monitors!(node_a, 0);
3118         }
3119
3120         // We don't yet support both needing updates, as that would require a different commitment dance:
3121         assert!((pending_htlc_adds.0 == 0 && pending_htlc_claims.0 == 0 && pending_htlc_fails.0 == 0 &&
3122                          pending_cell_htlc_claims.0 == 0 && pending_cell_htlc_fails.0 == 0) ||
3123                         (pending_htlc_adds.1 == 0 && pending_htlc_claims.1 == 0 && pending_htlc_fails.1 == 0 &&
3124                          pending_cell_htlc_claims.1 == 0 && pending_cell_htlc_fails.1 == 0));
3125
3126         for chan_msgs in resp_1.drain(..) {
3127                 if send_channel_ready.0 {
3128                         node_a.node.handle_channel_ready(&node_b.node.get_our_node_id(), &chan_msgs.0.unwrap());
3129                         let announcement_event = node_a.node.get_and_clear_pending_msg_events();
3130                         if !announcement_event.is_empty() {
3131                                 assert_eq!(announcement_event.len(), 1);
3132                                 if let MessageSendEvent::SendChannelUpdate { .. } = announcement_event[0] {
3133                                         //TODO: Test announcement_sigs re-sending
3134                                 } else { panic!("Unexpected event! {:?}", announcement_event[0]); }
3135                         }
3136                 } else {
3137                         assert!(chan_msgs.0.is_none());
3138                 }
3139                 if pending_raa.0 {
3140                         assert!(chan_msgs.3 == RAACommitmentOrder::RevokeAndACKFirst);
3141                         node_a.node.handle_revoke_and_ack(&node_b.node.get_our_node_id(), &chan_msgs.1.unwrap());
3142                         assert!(node_a.node.get_and_clear_pending_msg_events().is_empty());
3143                         check_added_monitors!(node_a, 1);
3144                 } else {
3145                         assert!(chan_msgs.1.is_none());
3146                 }
3147                 if pending_htlc_adds.0 != 0 || pending_htlc_claims.0 != 0 || pending_htlc_fails.0 != 0 || pending_cell_htlc_claims.0 != 0 || pending_cell_htlc_fails.0 != 0 {
3148                         let commitment_update = chan_msgs.2.unwrap();
3149                         if pending_htlc_adds.0 != -1 { // We use -1 to denote a response commitment_signed
3150                                 assert_eq!(commitment_update.update_add_htlcs.len(), pending_htlc_adds.0 as usize);
3151                         } else {
3152                                 assert!(commitment_update.update_add_htlcs.is_empty());
3153                         }
3154                         assert_eq!(commitment_update.update_fulfill_htlcs.len(), pending_htlc_claims.0 + pending_cell_htlc_claims.0);
3155                         assert_eq!(commitment_update.update_fail_htlcs.len(), pending_htlc_fails.0 + pending_cell_htlc_fails.0);
3156                         assert!(commitment_update.update_fail_malformed_htlcs.is_empty());
3157                         for update_add in commitment_update.update_add_htlcs {
3158                                 node_a.node.handle_update_add_htlc(&node_b.node.get_our_node_id(), &update_add);
3159                         }
3160                         for update_fulfill in commitment_update.update_fulfill_htlcs {
3161                                 node_a.node.handle_update_fulfill_htlc(&node_b.node.get_our_node_id(), &update_fulfill);
3162                         }
3163                         for update_fail in commitment_update.update_fail_htlcs {
3164                                 node_a.node.handle_update_fail_htlc(&node_b.node.get_our_node_id(), &update_fail);
3165                         }
3166
3167                         if pending_htlc_adds.0 != -1 { // We use -1 to denote a response commitment_signed
3168                                 commitment_signed_dance!(node_a, node_b, commitment_update.commitment_signed, false);
3169                         } else {
3170                                 node_a.node.handle_commitment_signed(&node_b.node.get_our_node_id(), &commitment_update.commitment_signed);
3171                                 check_added_monitors!(node_a, 1);
3172                                 let as_revoke_and_ack = get_event_msg!(node_a, MessageSendEvent::SendRevokeAndACK, node_b.node.get_our_node_id());
3173                                 // No commitment_signed so get_event_msg's assert(len == 1) passes
3174                                 node_b.node.handle_revoke_and_ack(&node_a.node.get_our_node_id(), &as_revoke_and_ack);
3175                                 assert!(node_b.node.get_and_clear_pending_msg_events().is_empty());
3176                                 check_added_monitors!(node_b, 1);
3177                         }
3178                 } else {
3179                         assert!(chan_msgs.2.is_none());
3180                 }
3181         }
3182
3183         for chan_msgs in resp_2.drain(..) {
3184                 if send_channel_ready.1 {
3185                         node_b.node.handle_channel_ready(&node_a.node.get_our_node_id(), &chan_msgs.0.unwrap());
3186                         let announcement_event = node_b.node.get_and_clear_pending_msg_events();
3187                         if !announcement_event.is_empty() {
3188                                 assert_eq!(announcement_event.len(), 1);
3189                                 match announcement_event[0] {
3190                                         MessageSendEvent::SendChannelUpdate { .. } => {},
3191                                         MessageSendEvent::SendAnnouncementSignatures { .. } => {},
3192                                         _ => panic!("Unexpected event {:?}!", announcement_event[0]),
3193                                 }
3194                         }
3195                 } else {
3196                         assert!(chan_msgs.0.is_none());
3197                 }
3198                 if pending_raa.1 {
3199                         assert!(chan_msgs.3 == RAACommitmentOrder::RevokeAndACKFirst);
3200                         node_b.node.handle_revoke_and_ack(&node_a.node.get_our_node_id(), &chan_msgs.1.unwrap());
3201                         assert!(node_b.node.get_and_clear_pending_msg_events().is_empty());
3202                         check_added_monitors!(node_b, 1);
3203                 } else {
3204                         assert!(chan_msgs.1.is_none());
3205                 }
3206                 if pending_htlc_adds.1 != 0 || pending_htlc_claims.1 != 0 || pending_htlc_fails.1 != 0 || pending_cell_htlc_claims.1 != 0 || pending_cell_htlc_fails.1 != 0 {
3207                         let commitment_update = chan_msgs.2.unwrap();
3208                         if pending_htlc_adds.1 != -1 { // We use -1 to denote a response commitment_signed
3209                                 assert_eq!(commitment_update.update_add_htlcs.len(), pending_htlc_adds.1 as usize);
3210                         }
3211                         assert_eq!(commitment_update.update_fulfill_htlcs.len(), pending_htlc_claims.1 + pending_cell_htlc_claims.1);
3212                         assert_eq!(commitment_update.update_fail_htlcs.len(), pending_htlc_fails.1 + pending_cell_htlc_fails.1);
3213                         assert!(commitment_update.update_fail_malformed_htlcs.is_empty());
3214                         for update_add in commitment_update.update_add_htlcs {
3215                                 node_b.node.handle_update_add_htlc(&node_a.node.get_our_node_id(), &update_add);
3216                         }
3217                         for update_fulfill in commitment_update.update_fulfill_htlcs {
3218                                 node_b.node.handle_update_fulfill_htlc(&node_a.node.get_our_node_id(), &update_fulfill);
3219                         }
3220                         for update_fail in commitment_update.update_fail_htlcs {
3221                                 node_b.node.handle_update_fail_htlc(&node_a.node.get_our_node_id(), &update_fail);
3222                         }
3223
3224                         if pending_htlc_adds.1 != -1 { // We use -1 to denote a response commitment_signed
3225                                 commitment_signed_dance!(node_b, node_a, commitment_update.commitment_signed, false);
3226                         } else {
3227                                 node_b.node.handle_commitment_signed(&node_a.node.get_our_node_id(), &commitment_update.commitment_signed);
3228                                 check_added_monitors!(node_b, 1);
3229                                 let bs_revoke_and_ack = get_event_msg!(node_b, MessageSendEvent::SendRevokeAndACK, node_a.node.get_our_node_id());
3230                                 // No commitment_signed so get_event_msg's assert(len == 1) passes
3231                                 node_a.node.handle_revoke_and_ack(&node_b.node.get_our_node_id(), &bs_revoke_and_ack);
3232                                 assert!(node_a.node.get_and_clear_pending_msg_events().is_empty());
3233                                 check_added_monitors!(node_a, 1);
3234                         }
3235                 } else {
3236                         assert!(chan_msgs.2.is_none());
3237                 }
3238         }
3239 }