X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=blobdiff_plain;f=fuzz%2Fsrc%2Fchanmon_consistency.rs;h=393f1b25d265cd165256f1bc61676a1692d10efa;hb=acf68eddefef0ffabdadc0d9d61655c6e63685e1;hp=e9f56a3e4605426881b442e580ef04ef8c5f9b97;hpb=d4ad57b7e65f206bc40989eaef7ce2efe9428935;p=rust-lightning diff --git a/fuzz/src/chanmon_consistency.rs b/fuzz/src/chanmon_consistency.rs index e9f56a3e..393f1b25 100644 --- a/fuzz/src/chanmon_consistency.rs +++ b/fuzz/src/chanmon_consistency.rs @@ -1,3 +1,12 @@ +// This file is Copyright its original authors, visible in version control +// history. +// +// This file is licensed under the Apache License, Version 2.0 or the MIT license +// , at your option. +// You may not use this file except in accordance with one or both of these +// licenses. + //! Test that monitor update failures don't get our channel state out of sync. //! One of the biggest concern with the monitor update failure handling code is that messages //! resent after monitor updating is restored are delivered out-of-order, resulting in @@ -9,7 +18,6 @@ //! send-side handling is correct, other peers. We consider it a failure if any action results in a //! channel being force-closed. -use bitcoin::BitcoinHash; use bitcoin::blockdata::block::BlockHeader; use bitcoin::blockdata::transaction::{Transaction, TxOut}; use bitcoin::blockdata::script::{Builder, Script}; @@ -20,16 +28,18 @@ use bitcoin::hashes::Hash as TraitImport; use bitcoin::hashes::sha256::Hash as Sha256; use bitcoin::hash_types::{BlockHash, WPubkeyHash}; -use lightning::chain::chaininterface; +use lightning::chain; +use lightning::chain::chainmonitor; +use lightning::chain::channelmonitor; +use lightning::chain::channelmonitor::{ChannelMonitor, ChannelMonitorUpdateErr, MonitorEvent}; use lightning::chain::transaction::OutPoint; -use lightning::chain::chaininterface::{BroadcasterInterface,ConfirmationTarget,ChainListener,FeeEstimator,ChainWatchInterfaceUtil,ChainWatchInterface}; +use lightning::chain::chaininterface::{BroadcasterInterface, ConfirmationTarget, FeeEstimator}; use lightning::chain::keysinterface::{KeysInterface, InMemoryChannelKeys}; -use lightning::ln::channelmonitor; -use lightning::ln::channelmonitor::{ChannelMonitor, ChannelMonitorUpdateErr, HTLCUpdate}; -use lightning::ln::channelmanager::{ChannelManager, PaymentHash, PaymentPreimage, PaymentSecret, ChannelManagerReadArgs}; +use lightning::ln::channelmanager::{ChannelManager, PaymentHash, PaymentPreimage, PaymentSecret, PaymentSendFailure, ChannelManagerReadArgs}; use lightning::ln::features::{ChannelFeatures, InitFeatures, NodeFeatures}; use lightning::ln::msgs::{CommitmentUpdate, ChannelMessageHandler, ErrorAction, UpdateAddHTLC, Init}; use lightning::util::enforcing_trait_impls::EnforcingChannelKeys; +use lightning::util::errors::APIError; use lightning::util::events; use lightning::util::logger::Logger; use lightning::util::config::UserConfig; @@ -39,6 +49,7 @@ use lightning::routing::router::{Route, RouteHop}; use utils::test_logger; +use utils::test_persister::TestPersister; use bitcoin::secp256k1::key::{PublicKey,SecretKey}; use bitcoin::secp256k1::Secp256k1; @@ -52,7 +63,7 @@ use std::io::Cursor; struct FuzzEstimator {} impl FeeEstimator for FuzzEstimator { - fn get_est_sat_per_1000_weight(&self, _: ConfirmationTarget) -> u64 { + fn get_est_sat_per_1000_weight(&self, _: ConfirmationTarget) -> u32 { 253 } } @@ -73,9 +84,9 @@ impl Writer for VecWriter { } } -struct TestChannelMonitor { +struct TestChainMonitor { pub logger: Arc, - pub simple_monitor: Arc, Arc, Arc, Arc>>, + pub chain_monitor: Arc, Arc, Arc, Arc, Arc>>, pub update_ret: Mutex>, // If we reload a node with an old copy of ChannelMonitors, the ChannelManager deserialization // logic will automatically force-close our channels for us (as we don't have an up-to-date @@ -85,10 +96,10 @@ struct TestChannelMonitor { pub latest_monitors: Mutex)>>, pub should_update_manager: atomic::AtomicBool, } -impl TestChannelMonitor { - pub fn new(chain_monitor: Arc, broadcaster: Arc, logger: Arc, feeest: Arc) -> Self { +impl TestChainMonitor { + pub fn new(broadcaster: Arc, logger: Arc, feeest: Arc, persister: Arc) -> Self { Self { - simple_monitor: Arc::new(channelmonitor::SimpleManyChannelMonitor::new(chain_monitor, broadcaster, logger.clone(), feeest)), + chain_monitor: Arc::new(chainmonitor::ChainMonitor::new(None, broadcaster, logger.clone(), feeest, persister)), logger, update_ret: Mutex::new(Ok(())), latest_monitors: Mutex::new(HashMap::new()), @@ -96,19 +107,21 @@ impl TestChannelMonitor { } } } -impl channelmonitor::ManyChannelMonitor for TestChannelMonitor { - fn add_monitor(&self, funding_txo: OutPoint, monitor: channelmonitor::ChannelMonitor) -> Result<(), channelmonitor::ChannelMonitorUpdateErr> { +impl chain::Watch for TestChainMonitor { + type Keys = EnforcingChannelKeys; + + fn watch_channel(&self, funding_txo: OutPoint, monitor: channelmonitor::ChannelMonitor) -> Result<(), channelmonitor::ChannelMonitorUpdateErr> { let mut ser = VecWriter(Vec::new()); - monitor.write_for_disk(&mut ser).unwrap(); + monitor.serialize_for_disk(&mut ser).unwrap(); if let Some(_) = self.latest_monitors.lock().unwrap().insert(funding_txo, (monitor.get_latest_update_id(), ser.0)) { - panic!("Already had monitor pre-add_monitor"); + panic!("Already had monitor pre-watch_channel"); } self.should_update_manager.store(true, atomic::Ordering::Relaxed); - assert!(self.simple_monitor.add_monitor(funding_txo, monitor).is_ok()); + assert!(self.chain_monitor.watch_channel(funding_txo, monitor).is_ok()); self.update_ret.lock().unwrap().clone() } - fn update_monitor(&self, funding_txo: OutPoint, update: channelmonitor::ChannelMonitorUpdate) -> Result<(), channelmonitor::ChannelMonitorUpdateErr> { + fn update_channel(&self, funding_txo: OutPoint, update: channelmonitor::ChannelMonitorUpdate) -> Result<(), channelmonitor::ChannelMonitorUpdateErr> { let mut map_lock = self.latest_monitors.lock().unwrap(); let mut map_entry = match map_lock.entry(funding_txo) { hash_map::Entry::Occupied(entry) => entry, @@ -116,23 +129,22 @@ impl channelmonitor::ManyChannelMonitor for TestChannelMon }; let mut deserialized_monitor = <(BlockHash, channelmonitor::ChannelMonitor)>:: read(&mut Cursor::new(&map_entry.get().1)).unwrap().1; - deserialized_monitor.update_monitor(update.clone(), &&TestBroadcaster {}, &self.logger).unwrap(); + deserialized_monitor.update_monitor(&update, &&TestBroadcaster{}, &&FuzzEstimator{}, &self.logger).unwrap(); let mut ser = VecWriter(Vec::new()); - deserialized_monitor.write_for_disk(&mut ser).unwrap(); + deserialized_monitor.serialize_for_disk(&mut ser).unwrap(); map_entry.insert((update.update_id, ser.0)); self.should_update_manager.store(true, atomic::Ordering::Relaxed); self.update_ret.lock().unwrap().clone() } - fn get_and_clear_pending_htlcs_updated(&self) -> Vec { - return self.simple_monitor.get_and_clear_pending_htlcs_updated(); + fn release_pending_monitor_events(&self) -> Vec { + return self.chain_monitor.release_pending_monitor_events(); } } struct KeyProvider { node_id: u8, - session_id: atomic::AtomicU8, - channel_id: atomic::AtomicU8, + rand_bytes_id: atomic::AtomicU8, } impl KeysInterface for KeyProvider { type ChanKeySigner = EnforcingChannelKeys; @@ -164,18 +176,54 @@ impl KeysInterface for KeyProvider { SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, self.node_id]).unwrap(), [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 9, self.node_id], channel_value_satoshis, + (0, 0), )) } - fn get_onion_rand(&self) -> (SecretKey, [u8; 32]) { - let id = self.session_id.fetch_add(1, atomic::Ordering::Relaxed); - (SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, id, 10, self.node_id]).unwrap(), - [0; 32]) + fn get_secure_random_bytes(&self) -> [u8; 32] { + let id = self.rand_bytes_id.fetch_add(1, atomic::Ordering::Relaxed); + [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, id, 11, self.node_id] } +} - fn get_channel_id(&self) -> [u8; 32] { - let id = self.channel_id.fetch_add(1, atomic::Ordering::Relaxed); - [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, id, 11, self.node_id] +#[inline] +fn check_api_err(api_err: APIError) { + match api_err { + APIError::APIMisuseError { .. } => panic!("We can't misuse the API"), + APIError::FeeRateTooHigh { .. } => panic!("We can't send too much fee?"), + APIError::RouteError { .. } => panic!("Our routes should work"), + APIError::ChannelUnavailable { err } => { + // Test the error against a list of errors we can hit, and reject + // all others. If you hit this panic, the list of acceptable errors + // is probably just stale and you should add new messages here. + match err.as_str() { + "Peer for first hop currently disconnected/pending monitor update!" => {}, + _ if err.starts_with("Cannot push more than their max accepted HTLCs ") => {}, + _ if err.starts_with("Cannot send value that would put us over the max HTLC value in flight our peer will accept ") => {}, + _ if err.starts_with("Cannot send value that would put our balance under counterparty-announced channel reserve value") => {}, + _ if err.starts_with("Cannot send value that would overdraw remaining funds.") => {}, + _ if err.starts_with("Cannot send value that would not leave enough to pay for fees.") => {}, + _ => panic!(err), + } + }, + APIError::MonitorUpdateFailed => { + // We can (obviously) temp-fail a monitor update + }, + } +} +#[inline] +fn check_payment_err(send_err: PaymentSendFailure) { + match send_err { + PaymentSendFailure::ParameterError(api_err) => check_api_err(api_err), + PaymentSendFailure::PathParameterError(per_path_results) => { + for res in per_path_results { if let Err(api_err) = res { check_api_err(api_err); } } + }, + PaymentSendFailure::AllFailedRetrySafe(per_path_results) => { + for api_err in per_path_results { check_api_err(api_err); } + }, + PaymentSendFailure::PartialFailure(per_path_results) => { + for res in per_path_results { if let Err(api_err) = res { check_api_err(api_err); } } + }, } } @@ -187,15 +235,14 @@ pub fn do_test(data: &[u8], out: Out) { macro_rules! make_node { ($node_id: expr) => { { let logger: Arc = Arc::new(test_logger::TestLogger::new($node_id.to_string(), out.clone())); - let watch = Arc::new(ChainWatchInterfaceUtil::new(Network::Bitcoin)); - let monitor = Arc::new(TestChannelMonitor::new(watch.clone(), broadcast.clone(), logger.clone(), fee_est.clone())); + let monitor = Arc::new(TestChainMonitor::new(broadcast.clone(), logger.clone(), fee_est.clone(), Arc::new(TestPersister{}))); - let keys_manager = Arc::new(KeyProvider { node_id: $node_id, session_id: atomic::AtomicU8::new(0), channel_id: atomic::AtomicU8::new(0) }); + let keys_manager = Arc::new(KeyProvider { node_id: $node_id, rand_bytes_id: atomic::AtomicU8::new(0) }); let mut config = UserConfig::default(); config.channel_options.fee_proportional_millionths = 0; config.channel_options.announced_channel = true; config.peer_channel_config_limits.min_dust_limit_satoshis = 0; - (Arc::new(ChannelManager::new(Network::Bitcoin, fee_est.clone(), monitor.clone(), broadcast.clone(), Arc::clone(&logger), keys_manager.clone(), config, 0).unwrap()), + (Arc::new(ChannelManager::new(Network::Bitcoin, fee_est.clone(), monitor.clone(), broadcast.clone(), Arc::clone(&logger), keys_manager.clone(), config, 0)), monitor) } } } @@ -203,10 +250,9 @@ pub fn do_test(data: &[u8], out: Out) { macro_rules! reload_node { ($ser: expr, $node_id: expr, $old_monitors: expr) => { { let logger: Arc = Arc::new(test_logger::TestLogger::new($node_id.to_string(), out.clone())); - let watch = Arc::new(ChainWatchInterfaceUtil::new(Network::Bitcoin)); - let monitor = Arc::new(TestChannelMonitor::new(watch.clone(), broadcast.clone(), logger.clone(), fee_est.clone())); + let chain_monitor = Arc::new(TestChainMonitor::new(broadcast.clone(), logger.clone(), fee_est.clone(), Arc::new(TestPersister{}))); - let keys_manager = Arc::new(KeyProvider { node_id: $node_id, session_id: atomic::AtomicU8::new(0), channel_id: atomic::AtomicU8::new(0) }); + let keys_manager = Arc::new(KeyProvider { node_id: $node_id, rand_bytes_id: atomic::AtomicU8::new(0) }); let mut config = UserConfig::default(); config.channel_options.fee_proportional_millionths = 0; config.channel_options.announced_channel = true; @@ -216,7 +262,7 @@ pub fn do_test(data: &[u8], out: Out) { let mut old_monitors = $old_monitors.latest_monitors.lock().unwrap(); for (outpoint, (update_id, monitor_ser)) in old_monitors.drain() { monitors.insert(outpoint, <(BlockHash, ChannelMonitor)>::read(&mut Cursor::new(&monitor_ser)).expect("Failed to read monitor").1); - monitor.latest_monitors.lock().unwrap().insert(outpoint, (update_id, monitor_ser)); + chain_monitor.latest_monitors.lock().unwrap().insert(outpoint, (update_id, monitor_ser)); } let mut monitor_refs = HashMap::new(); for (outpoint, monitor) in monitors.iter_mut() { @@ -226,14 +272,14 @@ pub fn do_test(data: &[u8], out: Out) { let read_args = ChannelManagerReadArgs { keys_manager, fee_estimator: fee_est.clone(), - monitor: monitor.clone(), + chain_monitor: chain_monitor.clone(), tx_broadcaster: broadcast.clone(), logger, default_config: config, - channel_monitors: &mut monitor_refs, + channel_monitors: monitor_refs, }; - (<(BlockHash, ChannelManager, Arc, Arc, Arc, Arc>)>::read(&mut Cursor::new(&$ser.0), read_args).expect("Failed to read manager").1, monitor) + (<(BlockHash, ChannelManager, Arc, Arc, Arc, Arc>)>::read(&mut Cursor::new(&$ser.0), read_args).expect("Failed to read manager").1, chain_monitor) } } } @@ -267,7 +313,7 @@ pub fn do_test(data: &[u8], out: Out) { let tx = Transaction { version: $chan_id, lock_time: 0, input: Vec::new(), output: vec![TxOut { value: *channel_value_satoshis, script_pubkey: output_script.clone(), }]}; - funding_output = OutPoint::new(tx.txid(), 0); + funding_output = OutPoint { txid: tx.txid(), index: 0 }; $source.funding_transaction_generated(&temporary_channel_id, funding_output); channel_txn.push(tx); } else { panic!("Wrong event type"); } @@ -304,16 +350,11 @@ pub fn do_test(data: &[u8], out: Out) { macro_rules! confirm_txn { ($node: expr) => { { let mut header = BlockHeader { version: 0x20000000, prev_blockhash: Default::default(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 }; - let mut txn = Vec::with_capacity(channel_txn.len()); - let mut posn = Vec::with_capacity(channel_txn.len()); - for i in 0..channel_txn.len() { - txn.push(&channel_txn[i]); - posn.push(i as u32 + 1); - } - $node.block_connected(&header, 1, &txn, &posn); + let txdata: Vec<_> = channel_txn.iter().enumerate().map(|(i, tx)| (i + 1, tx)).collect(); + $node.block_connected(&header, &txdata, 1); for i in 2..100 { - header = BlockHeader { version: 0x20000000, prev_blockhash: header.bitcoin_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 }; - $node.block_connected(&header, i, &Vec::new(), &[0; 0]); + header = BlockHeader { version: 0x20000000, prev_blockhash: header.block_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 }; + $node.block_connected(&header, &[], i); } } } } @@ -405,27 +446,26 @@ pub fn do_test(data: &[u8], out: Out) { loop { macro_rules! send_payment { - ($source: expr, $dest: expr) => { { + ($source: expr, $dest: expr, $amt: expr) => { { let payment_hash = Sha256::hash(&[payment_id; 1]); payment_id = payment_id.wrapping_add(1); - if let Err(_) = $source.send_payment(&Route { + if let Err(err) = $source.send_payment(&Route { paths: vec![vec![RouteHop { pubkey: $dest.0.get_our_node_id(), node_features: NodeFeatures::empty(), short_channel_id: $dest.1, channel_features: ChannelFeatures::empty(), - fee_msat: 5000000, + fee_msat: $amt, cltv_expiry_delta: 200, }]], }, PaymentHash(payment_hash.into_inner()), &None) { - // Probably ran out of funds - test_return!(); + check_payment_err(err); } } }; - ($source: expr, $middle: expr, $dest: expr) => { { + ($source: expr, $middle: expr, $dest: expr, $amt: expr) => { { let payment_hash = Sha256::hash(&[payment_id; 1]); payment_id = payment_id.wrapping_add(1); - if let Err(_) = $source.send_payment(&Route { + if let Err(err) = $source.send_payment(&Route { paths: vec![vec![RouteHop { pubkey: $middle.0.get_our_node_id(), node_features: NodeFeatures::empty(), @@ -438,12 +478,11 @@ pub fn do_test(data: &[u8], out: Out) { node_features: NodeFeatures::empty(), short_channel_id: $dest.1, channel_features: ChannelFeatures::empty(), - fee_msat: 5000000, + fee_msat: $amt, cltv_expiry_delta: 200, }]], }, PaymentHash(payment_hash.into_inner()), &None) { - // Probably ran out of funds - test_return!(); + check_payment_err(err); } } } } @@ -453,7 +492,7 @@ pub fn do_test(data: &[u8], out: Out) { payment_id = payment_id.wrapping_add(1); let payment_secret = Sha256::hash(&[payment_id; 1]); payment_id = payment_id.wrapping_add(1); - if let Err(_) = $source.send_payment(&Route { + if let Err(err) = $source.send_payment(&Route { paths: vec![vec![RouteHop { pubkey: $middle.0.get_our_node_id(), node_features: NodeFeatures::empty(), @@ -484,8 +523,7 @@ pub fn do_test(data: &[u8], out: Out) { cltv_expiry_delta: 200, }]], }, PaymentHash(payment_hash.into_inner()), &Some(PaymentSecret(payment_secret.into_inner()))) { - // Probably ran out of funds - test_return!(); + check_payment_err(err); } } } } @@ -641,12 +679,12 @@ pub fn do_test(data: &[u8], out: Out) { }); for event in events.drain(..) { match event { - events::Event::PaymentReceived { payment_hash, payment_secret, .. } => { + events::Event::PaymentReceived { payment_hash, payment_secret, amt } => { if claim_set.insert(payment_hash.0) { if $fail { assert!(nodes[$node].fail_htlc_backwards(&payment_hash, &payment_secret)); } else { - assert!(nodes[$node].claim_funds(PaymentPreimage(payment_hash.0), &payment_secret, 5_000_000)); + assert!(nodes[$node].claim_funds(PaymentPreimage(payment_hash.0), &payment_secret, amt)); } } }, @@ -688,12 +726,12 @@ pub fn do_test(data: &[u8], out: Out) { nodes[2].channel_monitor_updated(&chan_2_funding, *id); } }, - 0x09 => send_payment!(nodes[0], (&nodes[1], chan_a)), - 0x0a => send_payment!(nodes[1], (&nodes[0], chan_a)), - 0x0b => send_payment!(nodes[1], (&nodes[2], chan_b)), - 0x0c => send_payment!(nodes[2], (&nodes[1], chan_b)), - 0x0d => send_payment!(nodes[0], (&nodes[1], chan_a), (&nodes[2], chan_b)), - 0x0e => send_payment!(nodes[2], (&nodes[1], chan_b), (&nodes[0], chan_a)), + 0x09 => send_payment!(nodes[0], (&nodes[1], chan_a), 5_000_000), + 0x0a => send_payment!(nodes[1], (&nodes[0], chan_a), 5_000_000), + 0x0b => send_payment!(nodes[1], (&nodes[2], chan_b), 5_000_000), + 0x0c => send_payment!(nodes[2], (&nodes[1], chan_b), 5_000_000), + 0x0d => send_payment!(nodes[0], (&nodes[1], chan_a), (&nodes[2], chan_b), 5_000_000), + 0x0e => send_payment!(nodes[2], (&nodes[1], chan_b), (&nodes[0], chan_a), 5_000_000), 0x0f => { if !chan_a_disconnected { nodes[0].peer_disconnected(&nodes[1].get_our_node_id(), false); @@ -778,6 +816,24 @@ pub fn do_test(data: &[u8], out: Out) { }, 0x22 => send_payment_with_secret!(nodes[0], (&nodes[1], chan_a), (&nodes[2], chan_b)), 0x23 => send_payment_with_secret!(nodes[2], (&nodes[1], chan_b), (&nodes[0], chan_a)), + 0x25 => send_payment!(nodes[0], (&nodes[1], chan_a), 10), + 0x26 => send_payment!(nodes[1], (&nodes[0], chan_a), 10), + 0x27 => send_payment!(nodes[1], (&nodes[2], chan_b), 10), + 0x28 => send_payment!(nodes[2], (&nodes[1], chan_b), 10), + 0x29 => send_payment!(nodes[0], (&nodes[1], chan_a), (&nodes[2], chan_b), 10), + 0x2a => send_payment!(nodes[2], (&nodes[1], chan_b), (&nodes[0], chan_a), 10), + 0x2b => send_payment!(nodes[0], (&nodes[1], chan_a), 1_000), + 0x2c => send_payment!(nodes[1], (&nodes[0], chan_a), 1_000), + 0x2d => send_payment!(nodes[1], (&nodes[2], chan_b), 1_000), + 0x2e => send_payment!(nodes[2], (&nodes[1], chan_b), 1_000), + 0x2f => send_payment!(nodes[0], (&nodes[1], chan_a), (&nodes[2], chan_b), 1_000), + 0x30 => send_payment!(nodes[2], (&nodes[1], chan_b), (&nodes[0], chan_a), 1_000), + 0x31 => send_payment!(nodes[0], (&nodes[1], chan_a), 100_000), + 0x32 => send_payment!(nodes[1], (&nodes[0], chan_a), 100_000), + 0x33 => send_payment!(nodes[1], (&nodes[2], chan_b), 100_000), + 0x34 => send_payment!(nodes[2], (&nodes[1], chan_b), 100_000), + 0x35 => send_payment!(nodes[0], (&nodes[1], chan_a), (&nodes[2], chan_b), 100_000), + 0x36 => send_payment!(nodes[2], (&nodes[1], chan_b), (&nodes[0], chan_a), 100_000), // 0x24 defined above _ => test_return!(), }