1 use bitcoin::blockdata::block::BlockHeader;
2 use bitcoin::blockdata::transaction::Transaction;
3 use bitcoin::blockdata::constants::genesis_block;
4 use bitcoin::network::constants::Network;
5 use bitcoin::network::serialize::BitcoinHash;
6 use bitcoin::util::hash::Sha256dHash;
8 use secp256k1::key::{SecretKey,PublicKey};
9 use secp256k1::{Secp256k1,Message};
10 use secp256k1::ecdh::SharedSecret;
13 use chain::chaininterface::{BroadcasterInterface,ChainListener,ChainWatchInterface,FeeEstimator};
14 use chain::transaction::OutPoint;
15 use ln::channel::{Channel, ChannelKeys};
16 use ln::channelmonitor::ManyChannelMonitor;
17 use ln::router::{Route,RouteHop};
19 use ln::msgs::{HandleError,ChannelMessageHandler,MsgEncodable,MsgDecodable};
20 use util::{byte_utils, events, internal_traits, rng};
21 use util::sha2::Sha256;
22 use util::chacha20poly1305rfc::ChaCha20;
23 use util::logger::{Logger, Record};
26 use crypto::mac::{Mac,MacResult};
27 use crypto::hmac::Hmac;
28 use crypto::digest::Digest;
29 use crypto::symmetriccipher::SynchronousStreamCipher;
32 use std::collections::HashMap;
33 use std::collections::hash_map;
34 use std::sync::{Mutex,MutexGuard,Arc};
35 use std::sync::atomic::{AtomicUsize, Ordering};
36 use std::time::{Instant,Duration};
38 mod channel_held_info {
41 /// Stores the info we will need to send when we want to forward an HTLC onwards
42 pub struct PendingForwardHTLCInfo {
43 pub(super) onion_packet: Option<msgs::OnionPacket>,
44 pub(super) payment_hash: [u8; 32],
45 pub(super) short_channel_id: u64,
46 pub(super) prev_short_channel_id: u64,
47 pub(super) amt_to_forward: u64,
48 pub(super) outgoing_cltv_value: u32,
51 #[cfg(feature = "fuzztarget")]
52 impl PendingForwardHTLCInfo {
53 pub fn dummy() -> Self {
56 payment_hash: [0; 32],
58 prev_short_channel_id: 0,
60 outgoing_cltv_value: 0,
65 #[derive(Clone)] // See Channel::revoke_and_ack for why, tl;dr: Rust bug
66 pub enum HTLCFailReason {
68 err: msgs::OnionErrorPacket,
76 #[cfg(feature = "fuzztarget")]
78 pub fn dummy() -> Self {
79 HTLCFailReason::Reason {
80 failure_code: 0, data: Vec::new(),
85 #[cfg(feature = "fuzztarget")]
86 pub use self::channel_held_info::*;
87 #[cfg(not(feature = "fuzztarget"))]
88 pub(crate) use self::channel_held_info::*;
90 enum PendingOutboundHTLC {
92 source_short_channel_id: u64,
93 incoming_packet_shared_secret: SharedSecret,
97 session_priv: SecretKey,
99 /// Used for channel rebalancing
101 source_short_channel_id: u64,
102 incoming_packet_shared_secret: SharedSecret,
104 session_priv: SecretKey,
108 /// We hold back HTLCs we intend to relay for a random interval in the range (this, 5*this). This
109 /// provides some limited amount of privacy. Ideally this would range from somewhere like 1 second
110 /// to 30 seconds, but people expect lightning to be, you know, kinda fast, sadly. We could
111 /// probably increase this significantly.
112 const MIN_HTLC_RELAY_HOLDING_CELL_MILLIS: u32 = 50;
114 struct ChannelHolder {
115 by_id: HashMap<[u8; 32], Channel>,
116 short_to_id: HashMap<u64, [u8; 32]>,
117 next_forward: Instant,
118 /// short channel id -> forward infos. Key of 0 means payments received
119 /// Note that while this is held in the same mutex as the channels themselves, no consistency
120 /// guarantees are made about there existing a channel with the short id here, nor the short
121 /// ids in the PendingForwardHTLCInfo!
122 forward_htlcs: HashMap<u64, Vec<PendingForwardHTLCInfo>>,
123 /// Note that while this is held in the same mutex as the channels themselves, no consistency
124 /// guarantees are made about the channels given here actually existing anymore by the time you
126 claimable_htlcs: HashMap<[u8; 32], PendingOutboundHTLC>,
128 struct MutChannelHolder<'a> {
129 by_id: &'a mut HashMap<[u8; 32], Channel>,
130 short_to_id: &'a mut HashMap<u64, [u8; 32]>,
131 next_forward: &'a mut Instant,
132 forward_htlcs: &'a mut HashMap<u64, Vec<PendingForwardHTLCInfo>>,
133 claimable_htlcs: &'a mut HashMap<[u8; 32], PendingOutboundHTLC>,
136 fn borrow_parts(&mut self) -> MutChannelHolder {
138 by_id: &mut self.by_id,
139 short_to_id: &mut self.short_to_id,
140 next_forward: &mut self.next_forward,
141 forward_htlcs: &mut self.forward_htlcs,
142 claimable_htlcs: &mut self.claimable_htlcs,
147 #[cfg(not(any(target_pointer_width = "32", target_pointer_width = "64")))]
148 const ERR: () = "You need at least 32 bit pointers (well, usize, but we'll assume they're the same) for ChannelManager::latest_block_height";
150 /// Manager which keeps track of a number of channels and sends messages to the appropriate
151 /// channel, also tracking HTLC preimages and forwarding onion packets appropriately.
152 /// Implements ChannelMessageHandler, handling the multi-channel parts and passing things through
153 /// to individual Channels.
154 pub struct ChannelManager {
155 genesis_hash: Sha256dHash,
156 fee_estimator: Arc<FeeEstimator>,
157 monitor: Arc<ManyChannelMonitor>,
158 chain_monitor: Arc<ChainWatchInterface>,
159 tx_broadcaster: Arc<BroadcasterInterface>,
161 announce_channels_publicly: bool,
162 fee_proportional_millionths: u32,
163 latest_block_height: AtomicUsize,
166 channel_state: Mutex<ChannelHolder>,
167 our_network_key: SecretKey,
169 pending_events: Mutex<Vec<events::Event>>,
174 const CLTV_EXPIRY_DELTA: u16 = 6 * 24 * 2; //TODO?
176 macro_rules! secp_call {
180 //TODO: Make the err a parameter!
181 Err(_) => return Err(HandleError{err: "Key error", action: None})
188 shared_secret: SharedSecret,
190 blinding_factor: [u8; 32],
191 ephemeral_pubkey: PublicKey,
196 pub struct ChannelDetails {
197 /// The channel's ID (prior to funding transaction generation, this is a random 32 bytes,
198 /// thereafter this is the txid of the funding transaction xor the funding transaction output).
199 /// Note that this means this value is *not* persistent - it can change once during the
200 /// lifetime of the channel.
201 pub channel_id: [u8; 32],
202 /// The position of the funding transaction in the chain. None if the funding transaction has
203 /// not yet been confirmed and the channel fully opened.
204 pub short_channel_id: Option<u64>,
205 pub remote_network_id: PublicKey,
206 pub channel_value_satoshis: u64,
207 /// The user_id passed in to create_channel, or 0 if the channel was inbound.
211 impl ChannelManager {
212 /// Constructs a new ChannelManager to hold several channels and route between them. This is
213 /// the main "logic hub" for all channel-related actions, and implements ChannelMessageHandler.
214 /// fee_proportional_millionths is an optional fee to charge any payments routed through us.
215 /// Non-proportional fees are fixed according to our risk using the provided fee estimator.
216 /// panics if channel_value_satoshis is >= `MAX_FUNDING_SATOSHIS`!
217 pub fn new(our_network_key: SecretKey, fee_proportional_millionths: u32, announce_channels_publicly: bool, network: Network, feeest: Arc<FeeEstimator>, monitor: Arc<ManyChannelMonitor>, chain_monitor: Arc<ChainWatchInterface>, tx_broadcaster: Arc<BroadcasterInterface>, logger: Arc<Logger>) -> Result<Arc<ChannelManager>, secp256k1::Error> {
218 let secp_ctx = Secp256k1::new();
220 let res = Arc::new(ChannelManager {
221 genesis_hash: genesis_block(network).header.bitcoin_hash(),
222 fee_estimator: feeest.clone(),
223 monitor: monitor.clone(),
227 announce_channels_publicly,
228 fee_proportional_millionths,
229 latest_block_height: AtomicUsize::new(0), //TODO: Get an init value (generally need to replay recent chain on chain_monitor registration)
232 channel_state: Mutex::new(ChannelHolder{
233 by_id: HashMap::new(),
234 short_to_id: HashMap::new(),
235 next_forward: Instant::now(),
236 forward_htlcs: HashMap::new(),
237 claimable_htlcs: HashMap::new(),
241 pending_events: Mutex::new(Vec::new()),
245 let weak_res = Arc::downgrade(&res);
246 res.chain_monitor.register_listener(weak_res);
250 /// Creates a new outbound channel to the given remote node and with the given value.
251 /// user_id will be provided back as user_channel_id in FundingGenerationReady and
252 /// FundingBroadcastSafe events to allow tracking of which events correspond with which
253 /// create_channel call. Note that user_channel_id defaults to 0 for inbound channels, so you
254 /// may wish to avoid using 0 for user_id here.
255 /// If successful, will generate a SendOpenChannel event, so you should probably poll
256 /// PeerManager::process_events afterwards.
257 pub fn create_channel(&self, their_network_key: PublicKey, channel_value_satoshis: u64, user_id: u64) -> Result<(), HandleError> {
258 let chan_keys = if cfg!(feature = "fuzztarget") {
260 funding_key: SecretKey::from_slice(&self.secp_ctx, &[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, 0, 0]).unwrap(),
261 revocation_base_key: SecretKey::from_slice(&self.secp_ctx, &[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, 0, 0]).unwrap(),
262 payment_base_key: SecretKey::from_slice(&self.secp_ctx, &[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, 0, 0]).unwrap(),
263 delayed_payment_base_key: SecretKey::from_slice(&self.secp_ctx, &[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, 0, 0]).unwrap(),
264 htlc_base_key: SecretKey::from_slice(&self.secp_ctx, &[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, 0, 0]).unwrap(),
265 channel_close_key: SecretKey::from_slice(&self.secp_ctx, &[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, 0, 0]).unwrap(),
266 channel_monitor_claim_key: SecretKey::from_slice(&self.secp_ctx, &[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, 0, 0]).unwrap(),
267 commitment_seed: [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, 0, 0],
270 let mut key_seed = [0u8; 32];
271 rng::fill_bytes(&mut key_seed);
272 match ChannelKeys::new_from_seed(&key_seed) {
274 Err(_) => panic!("RNG is busted!")
278 let channel = Channel::new_outbound(&*self.fee_estimator, chan_keys, their_network_key, channel_value_satoshis, self.announce_channels_publicly, user_id, Arc::clone(&self.logger));
279 let res = channel.get_open_channel(self.genesis_hash.clone(), &*self.fee_estimator)?;
280 let mut channel_state = self.channel_state.lock().unwrap();
281 match channel_state.by_id.insert(channel.channel_id(), channel) {
282 Some(_) => panic!("RNG is bad???"),
286 let mut events = self.pending_events.lock().unwrap();
287 events.push(events::Event::SendOpenChannel {
288 node_id: their_network_key,
294 /// Gets the list of open channels, in random order. See ChannelDetail field documentation for
295 /// more information.
296 pub fn list_channels(&self) -> Vec<ChannelDetails> {
297 let channel_state = self.channel_state.lock().unwrap();
298 let mut res = Vec::with_capacity(channel_state.by_id.len());
299 for (channel_id, channel) in channel_state.by_id.iter() {
300 res.push(ChannelDetails {
301 channel_id: (*channel_id).clone(),
302 short_channel_id: channel.get_short_channel_id(),
303 remote_network_id: channel.get_their_node_id(),
304 channel_value_satoshis: channel.get_value_satoshis(),
305 user_id: channel.get_user_id(),
311 /// Gets the list of usable channels, in random order. Useful as an argument to
312 /// Router::get_route to ensure non-announced channels are used.
313 pub fn list_usable_channels(&self) -> Vec<ChannelDetails> {
314 let channel_state = self.channel_state.lock().unwrap();
315 let mut res = Vec::with_capacity(channel_state.by_id.len());
316 for (channel_id, channel) in channel_state.by_id.iter() {
317 if channel.is_usable() {
318 res.push(ChannelDetails {
319 channel_id: (*channel_id).clone(),
320 short_channel_id: channel.get_short_channel_id(),
321 remote_network_id: channel.get_their_node_id(),
322 channel_value_satoshis: channel.get_value_satoshis(),
323 user_id: channel.get_user_id(),
330 /// Begins the process of closing a channel. After this call (plus some timeout), no new HTLCs
331 /// will be accepted on the given channel, and after additional timeout/the closing of all
332 /// pending HTLCs, the channel will be closed on chain.
333 /// May generate a SendShutdown event on success, which should be relayed.
334 pub fn close_channel(&self, channel_id: &[u8; 32]) -> Result<(), HandleError> {
335 let (res, node_id, chan_option) = {
336 let mut channel_state_lock = self.channel_state.lock().unwrap();
337 let channel_state = channel_state_lock.borrow_parts();
338 match channel_state.by_id.entry(channel_id.clone()) {
339 hash_map::Entry::Occupied(mut chan_entry) => {
340 let res = chan_entry.get_mut().get_shutdown()?;
341 if chan_entry.get().is_shutdown() {
342 if let Some(short_id) = chan_entry.get().get_short_channel_id() {
343 channel_state.short_to_id.remove(&short_id);
345 (res, chan_entry.get().get_their_node_id(), Some(chan_entry.remove_entry().1))
346 } else { (res, chan_entry.get().get_their_node_id(), None) }
348 hash_map::Entry::Vacant(_) => return Err(HandleError{err: "No such channel", action: None})
351 for payment_hash in res.1 {
352 // unknown_next_peer...I dunno who that is anymore....
353 self.fail_htlc_backwards_internal(self.channel_state.lock().unwrap(), &payment_hash, HTLCFailReason::Reason { failure_code: 0x4000 | 10, data: Vec::new() });
355 let chan_update = if let Some(chan) = chan_option {
356 if let Ok(update) = self.get_channel_update(&chan) {
361 let mut events = self.pending_events.lock().unwrap();
362 if let Some(update) = chan_update {
363 events.push(events::Event::BroadcastChannelUpdate {
367 events.push(events::Event::SendShutdown {
376 fn finish_force_close_channel(&self, shutdown_res: (Vec<Transaction>, Vec<[u8; 32]>)) {
377 let (local_txn, failed_htlcs) = shutdown_res;
378 for payment_hash in failed_htlcs {
379 // unknown_next_peer...I dunno who that is anymore....
380 self.fail_htlc_backwards_internal(self.channel_state.lock().unwrap(), &payment_hash, HTLCFailReason::Reason { failure_code: 0x4000 | 10, data: Vec::new() });
382 for tx in local_txn {
383 self.tx_broadcaster.broadcast_transaction(&tx);
385 //TODO: We need to have a way where outbound HTLC claims can result in us claiming the
386 //now-on-chain HTLC output for ourselves (and, thereafter, passing the HTLC backwards).
387 //TODO: We need to handle monitoring of pending offered HTLCs which just hit the chain and
388 //may be claimed, resulting in us claiming the inbound HTLCs (and back-failing after
389 //timeouts are hit and our claims confirm).
392 /// Force closes a channel, immediately broadcasting the latest local commitment transaction to
393 /// the chain and rejecting new HTLCs on the given channel.
394 pub fn force_close_channel(&self, channel_id: &[u8; 32]) {
396 let mut channel_state_lock = self.channel_state.lock().unwrap();
397 let channel_state = channel_state_lock.borrow_parts();
398 if let Some(chan) = channel_state.by_id.remove(channel_id) {
399 if let Some(short_id) = chan.get_short_channel_id() {
400 channel_state.short_to_id.remove(&short_id);
407 self.finish_force_close_channel(chan.force_shutdown());
408 let mut events = self.pending_events.lock().unwrap();
409 if let Ok(update) = self.get_channel_update(&chan) {
410 events.push(events::Event::BroadcastChannelUpdate {
417 fn gen_rho_mu_from_shared_secret(shared_secret: &SharedSecret) -> ([u8; 32], [u8; 32]) {
419 let mut hmac = Hmac::new(Sha256::new(), &[0x72, 0x68, 0x6f]); // rho
420 hmac.input(&shared_secret[..]);
421 let mut res = [0; 32];
422 hmac.raw_result(&mut res);
426 let mut hmac = Hmac::new(Sha256::new(), &[0x6d, 0x75]); // mu
427 hmac.input(&shared_secret[..]);
428 let mut res = [0; 32];
429 hmac.raw_result(&mut res);
435 fn gen_um_from_shared_secret(shared_secret: &SharedSecret) -> [u8; 32] {
436 let mut hmac = Hmac::new(Sha256::new(), &[0x75, 0x6d]); // um
437 hmac.input(&shared_secret[..]);
438 let mut res = [0; 32];
439 hmac.raw_result(&mut res);
444 fn gen_ammag_from_shared_secret(shared_secret: &SharedSecret) -> [u8; 32] {
445 let mut hmac = Hmac::new(Sha256::new(), &[0x61, 0x6d, 0x6d, 0x61, 0x67]); // ammag
446 hmac.input(&shared_secret[..]);
447 let mut res = [0; 32];
448 hmac.raw_result(&mut res);
452 // can only fail if an intermediary hop has an invalid public key or session_priv is invalid
454 fn construct_onion_keys_callback<FType: FnMut(SharedSecret, [u8; 32], PublicKey, &RouteHop)> (secp_ctx: &Secp256k1, route: &Route, session_priv: &SecretKey, mut callback: FType) -> Result<(), HandleError> {
455 let mut blinded_priv = session_priv.clone();
456 let mut blinded_pub = secp_call!(PublicKey::from_secret_key(secp_ctx, &blinded_priv));
457 let mut first_iteration = true;
459 for hop in route.hops.iter() {
460 let shared_secret = SharedSecret::new(secp_ctx, &hop.pubkey, &blinded_priv);
462 let mut sha = Sha256::new();
463 sha.input(&blinded_pub.serialize()[..]);
464 sha.input(&shared_secret[..]);
465 let mut blinding_factor = [0u8; 32];
466 sha.result(&mut blinding_factor);
469 blinded_pub = secp_call!(PublicKey::from_secret_key(secp_ctx, &blinded_priv));
470 first_iteration = false;
472 let ephemeral_pubkey = blinded_pub;
474 secp_call!(blinded_priv.mul_assign(secp_ctx, &secp_call!(SecretKey::from_slice(secp_ctx, &blinding_factor))));
475 blinded_pub = secp_call!(PublicKey::from_secret_key(secp_ctx, &blinded_priv));
477 callback(shared_secret, blinding_factor, ephemeral_pubkey, hop);
483 // can only fail if an intermediary hop has an invalid public key or session_priv is invalid
484 fn construct_onion_keys(secp_ctx: &Secp256k1, route: &Route, session_priv: &SecretKey) -> Result<Vec<OnionKeys>, HandleError> {
485 let mut res = Vec::with_capacity(route.hops.len());
487 Self::construct_onion_keys_callback(secp_ctx, route, session_priv, |shared_secret, _blinding_factor, ephemeral_pubkey, _| {
488 let (rho, mu) = ChannelManager::gen_rho_mu_from_shared_secret(&shared_secret);
494 blinding_factor: _blinding_factor,
504 /// returns the hop data, as well as the first-hop value_msat and CLTV value we should send.
505 fn build_onion_payloads(route: &Route, starting_htlc_offset: u32) -> Result<(Vec<msgs::OnionHopData>, u64, u32), HandleError> {
506 let mut cur_value_msat = 0u64;
507 let mut cur_cltv = starting_htlc_offset;
508 let mut last_short_channel_id = 0;
509 let mut res: Vec<msgs::OnionHopData> = Vec::with_capacity(route.hops.len());
510 internal_traits::test_no_dealloc::<msgs::OnionHopData>(None);
511 unsafe { res.set_len(route.hops.len()); }
513 for (idx, hop) in route.hops.iter().enumerate().rev() {
514 // First hop gets special values so that it can check, on receipt, that everything is
515 // exactly as it should be (and the next hop isn't trying to probe to find out if we're
516 // the intended recipient).
517 let value_msat = if cur_value_msat == 0 { hop.fee_msat } else { cur_value_msat };
518 let cltv = if cur_cltv == starting_htlc_offset { hop.cltv_expiry_delta + starting_htlc_offset } else { cur_cltv };
519 res[idx] = msgs::OnionHopData {
521 data: msgs::OnionRealm0HopData {
522 short_channel_id: last_short_channel_id,
523 amt_to_forward: value_msat,
524 outgoing_cltv_value: cltv,
528 cur_value_msat += hop.fee_msat;
529 if cur_value_msat >= 21000000 * 100000000 * 1000 {
530 return Err(HandleError{err: "Channel fees overflowed?!", action: None});
532 cur_cltv += hop.cltv_expiry_delta as u32;
533 if cur_cltv >= 500000000 {
534 return Err(HandleError{err: "Channel CLTV overflowed?!", action: None});
536 last_short_channel_id = hop.short_channel_id;
538 Ok((res, cur_value_msat, cur_cltv))
542 fn shift_arr_right(arr: &mut [u8; 20*65]) {
544 ptr::copy(arr[0..].as_ptr(), arr[65..].as_mut_ptr(), 19*65);
552 fn xor_bufs(dst: &mut[u8], src: &[u8]) {
553 assert_eq!(dst.len(), src.len());
555 for i in 0..dst.len() {
560 const ZERO:[u8; 21*65] = [0; 21*65];
561 fn construct_onion_packet(mut payloads: Vec<msgs::OnionHopData>, onion_keys: Vec<OnionKeys>, associated_data: &[u8; 32]) -> Result<msgs::OnionPacket, HandleError> {
562 let mut buf = Vec::with_capacity(21*65);
563 buf.resize(21*65, 0);
566 let iters = payloads.len() - 1;
567 let end_len = iters * 65;
568 let mut res = Vec::with_capacity(end_len);
569 res.resize(end_len, 0);
571 for (i, keys) in onion_keys.iter().enumerate() {
572 if i == payloads.len() - 1 { continue; }
573 let mut chacha = ChaCha20::new(&keys.rho, &[0u8; 8]);
574 chacha.process(&ChannelManager::ZERO, &mut buf); // We don't have a seek function :(
575 ChannelManager::xor_bufs(&mut res[0..(i + 1)*65], &buf[(20 - i)*65..21*65]);
580 let mut packet_data = [0; 20*65];
581 let mut hmac_res = [0; 32];
583 for (i, (payload, keys)) in payloads.iter_mut().zip(onion_keys.iter()).rev().enumerate() {
584 ChannelManager::shift_arr_right(&mut packet_data);
585 payload.hmac = hmac_res;
586 packet_data[0..65].copy_from_slice(&payload.encode()[..]);
588 let mut chacha = ChaCha20::new(&keys.rho, &[0u8; 8]);
589 chacha.process(&packet_data, &mut buf[0..20*65]);
590 packet_data[..].copy_from_slice(&buf[0..20*65]);
593 packet_data[20*65 - filler.len()..20*65].copy_from_slice(&filler[..]);
596 let mut hmac = Hmac::new(Sha256::new(), &keys.mu);
597 hmac.input(&packet_data);
598 hmac.input(&associated_data[..]);
599 hmac.raw_result(&mut hmac_res);
602 Ok(msgs::OnionPacket{
604 public_key: onion_keys.first().unwrap().ephemeral_pubkey,
605 hop_data: packet_data,
610 /// Encrypts a failure packet. raw_packet can either be a
611 /// msgs::DecodedOnionErrorPacket.encode() result or a msgs::OnionErrorPacket.data element.
612 fn encrypt_failure_packet(shared_secret: &SharedSecret, raw_packet: &[u8]) -> msgs::OnionErrorPacket {
613 let ammag = ChannelManager::gen_ammag_from_shared_secret(&shared_secret);
615 let mut packet_crypted = Vec::with_capacity(raw_packet.len());
616 packet_crypted.resize(raw_packet.len(), 0);
617 let mut chacha = ChaCha20::new(&ammag, &[0u8; 8]);
618 chacha.process(&raw_packet, &mut packet_crypted[..]);
619 msgs::OnionErrorPacket {
620 data: packet_crypted,
624 fn build_failure_packet(shared_secret: &SharedSecret, failure_type: u16, failure_data: &[u8]) -> msgs::DecodedOnionErrorPacket {
625 assert!(failure_data.len() <= 256 - 2);
627 let um = ChannelManager::gen_um_from_shared_secret(&shared_secret);
630 let mut res = Vec::with_capacity(2 + failure_data.len());
631 res.push(((failure_type >> 8) & 0xff) as u8);
632 res.push(((failure_type >> 0) & 0xff) as u8);
633 res.extend_from_slice(&failure_data[..]);
637 let mut res = Vec::with_capacity(256 - 2 - failure_data.len());
638 res.resize(256 - 2 - failure_data.len(), 0);
641 let mut packet = msgs::DecodedOnionErrorPacket {
643 failuremsg: failuremsg,
647 let mut hmac = Hmac::new(Sha256::new(), &um);
648 hmac.input(&packet.encode()[32..]);
649 hmac.raw_result(&mut packet.hmac);
655 fn build_first_hop_failure_packet(shared_secret: &SharedSecret, failure_type: u16, failure_data: &[u8]) -> msgs::OnionErrorPacket {
656 let failure_packet = ChannelManager::build_failure_packet(shared_secret, failure_type, failure_data);
657 ChannelManager::encrypt_failure_packet(shared_secret, &failure_packet.encode()[..])
660 /// only fails if the channel does not yet have an assigned short_id
661 fn get_channel_update(&self, chan: &Channel) -> Result<msgs::ChannelUpdate, HandleError> {
662 let short_channel_id = match chan.get_short_channel_id() {
663 None => return Err(HandleError{err: "Channel not yet established", action: None}),
667 let were_node_one = PublicKey::from_secret_key(&self.secp_ctx, &self.our_network_key).unwrap().serialize()[..] < chan.get_their_node_id().serialize()[..];
669 let unsigned = msgs::UnsignedChannelUpdate {
670 chain_hash: self.genesis_hash,
671 short_channel_id: short_channel_id,
672 timestamp: chan.get_channel_update_count(),
673 flags: (!were_node_one) as u16 | ((!chan.is_live() as u16) << 1),
674 cltv_expiry_delta: CLTV_EXPIRY_DELTA,
675 htlc_minimum_msat: chan.get_our_htlc_minimum_msat(),
676 fee_base_msat: chan.get_our_fee_base_msat(&*self.fee_estimator),
677 fee_proportional_millionths: self.fee_proportional_millionths,
680 let msg_hash = Sha256dHash::from_data(&unsigned.encode()[..]);
681 let sig = self.secp_ctx.sign(&Message::from_slice(&msg_hash[..]).unwrap(), &self.our_network_key).unwrap(); //TODO Can we unwrap here?
683 Ok(msgs::ChannelUpdate {
689 /// Sends a payment along a given route.
690 /// Value parameters are provided via the last hop in route, see documentation for RouteHop
691 /// fields for more info.
692 /// Note that if the payment_hash already exists elsewhere (eg you're sending a duplicative
693 /// payment), we don't do anything to stop you! We always try to ensure that if the provided
694 /// next hop knows the preimage to payment_hash they can claim an additional amount as
695 /// specified in the last hop in the route! Thus, you should probably do your own
696 /// payment_preimage tracking (which you should already be doing as they represent "proof of
697 /// payment") and prevent double-sends yourself.
698 /// See-also docs on Channel::send_htlc_and_commit.
699 /// May generate a SendHTLCs event on success, which should be relayed.
700 pub fn send_payment(&self, route: Route, payment_hash: [u8; 32]) -> Result<(), HandleError> {
701 if route.hops.len() < 1 || route.hops.len() > 20 {
702 return Err(HandleError{err: "Route didn't go anywhere/had bogus size", action: None});
704 let our_node_id = self.get_our_node_id();
705 for (idx, hop) in route.hops.iter().enumerate() {
706 if idx != route.hops.len() - 1 && hop.pubkey == our_node_id {
707 return Err(HandleError{err: "Route went through us but wasn't a simple rebalance loop to us", action: None});
711 let session_priv = secp_call!(SecretKey::from_slice(&self.secp_ctx, &{
712 let mut session_key = [0; 32];
713 rng::fill_bytes(&mut session_key);
717 let cur_height = self.latest_block_height.load(Ordering::Acquire) as u32 + 1;
719 let onion_keys = ChannelManager::construct_onion_keys(&self.secp_ctx, &route, &session_priv)?;
720 let (onion_payloads, htlc_msat, htlc_cltv) = ChannelManager::build_onion_payloads(&route, cur_height)?;
721 let onion_packet = ChannelManager::construct_onion_packet(onion_payloads, onion_keys, &payment_hash)?;
723 let (first_hop_node_id, (update_add, commitment_signed, chan_monitor)) = {
724 let mut channel_state_lock = self.channel_state.lock().unwrap();
725 let channel_state = channel_state_lock.borrow_parts();
727 let id = match channel_state.short_to_id.get(&route.hops.first().unwrap().short_channel_id) {
728 None => return Err(HandleError{err: "No channel available with first hop!", action: None}),
729 Some(id) => id.clone()
732 let claimable_htlc_entry = channel_state.claimable_htlcs.entry(payment_hash.clone());
733 if let hash_map::Entry::Occupied(_) = claimable_htlc_entry {
734 return Err(HandleError{err: "Already had pending HTLC with the same payment_hash", action: None});
738 let chan = channel_state.by_id.get_mut(&id).unwrap();
739 if chan.get_their_node_id() != route.hops.first().unwrap().pubkey {
740 return Err(HandleError{err: "Node ID mismatch on first hop!", action: None});
742 chan.send_htlc_and_commit(htlc_msat, payment_hash, htlc_cltv, onion_packet)?
745 let first_hop_node_id = route.hops.first().unwrap().pubkey;
747 claimable_htlc_entry.or_insert(PendingOutboundHTLC::OutboundRoute {
753 Some(msgs) => (first_hop_node_id, msgs),
754 None => return Ok(()),
758 if let Err(_e) = self.monitor.add_update_monitor(chan_monitor.get_funding_txo().unwrap(), chan_monitor) {
759 unimplemented!(); // maybe remove from claimable_htlcs?
762 let mut events = self.pending_events.lock().unwrap();
763 events.push(events::Event::SendHTLCs {
764 node_id: first_hop_node_id,
765 msgs: vec![update_add],
766 commitment_msg: commitment_signed,
771 /// Call this upon creation of a funding transaction for the given channel.
772 /// Panics if a funding transaction has already been provided for this channel.
773 pub fn funding_transaction_generated(&self, temporary_channel_id: &[u8; 32], funding_txo: OutPoint) {
775 macro_rules! add_pending_event {
778 let mut pending_events = self.pending_events.lock().unwrap();
779 pending_events.push($event);
784 let (chan, msg, chan_monitor) = {
785 let mut channel_state = self.channel_state.lock().unwrap();
786 match channel_state.by_id.remove(temporary_channel_id) {
788 match chan.get_outbound_funding_created(funding_txo) {
790 (chan, funding_msg.0, funding_msg.1)
793 log_error!(self, "Got bad signatures: {}!", e.err);
794 mem::drop(channel_state);
795 add_pending_event!(events::Event::HandleError {
796 node_id: chan.get_their_node_id(),
805 }; // Release channel lock for install_watch_outpoint call,
806 if let Err(_e) = self.monitor.add_update_monitor(chan_monitor.get_funding_txo().unwrap(), chan_monitor) {
807 unimplemented!(); // maybe remove from claimable_htlcs?
809 add_pending_event!(events::Event::SendFundingCreated {
810 node_id: chan.get_their_node_id(),
814 let mut channel_state = self.channel_state.lock().unwrap();
815 channel_state.by_id.insert(chan.channel_id(), chan);
818 fn get_announcement_sigs(&self, chan: &Channel) -> Result<Option<msgs::AnnouncementSignatures>, HandleError> {
819 if !chan.is_usable() || !chan.should_announce() { return Ok(None) }
821 let (announcement, our_bitcoin_sig) = chan.get_channel_announcement(self.get_our_node_id(), self.genesis_hash.clone())?;
822 let msghash = Message::from_slice(&Sha256dHash::from_data(&announcement.encode()[..])[..]).unwrap();
823 let our_node_sig = secp_call!(self.secp_ctx.sign(&msghash, &self.our_network_key));
825 Ok(Some(msgs::AnnouncementSignatures {
826 channel_id: chan.channel_id(),
827 short_channel_id: chan.get_short_channel_id().unwrap(),
828 node_signature: our_node_sig,
829 bitcoin_signature: our_bitcoin_sig,
833 /// Processes HTLCs which are pending waiting on random forward delay.
834 /// Should only really ever be called in response to an PendingHTLCsForwardable event.
835 /// Will likely generate further events.
836 pub fn process_pending_htlc_forwards(&self) {
837 let mut new_events = Vec::new();
838 let mut failed_forwards = Vec::new();
840 let mut channel_state_lock = self.channel_state.lock().unwrap();
841 let channel_state = channel_state_lock.borrow_parts();
843 if cfg!(not(feature = "fuzztarget")) && Instant::now() < *channel_state.next_forward {
847 for (short_chan_id, pending_forwards) in channel_state.forward_htlcs.drain() {
848 if short_chan_id != 0 {
849 let forward_chan_id = match channel_state.short_to_id.get(&short_chan_id) {
850 Some(chan_id) => chan_id.clone(),
852 failed_forwards.reserve(pending_forwards.len());
853 for forward_info in pending_forwards {
854 failed_forwards.push((forward_info.payment_hash, 0x4000 | 10, None));
859 let forward_chan = &mut channel_state.by_id.get_mut(&forward_chan_id).unwrap();
861 let mut add_htlc_msgs = Vec::new();
862 for forward_info in pending_forwards {
863 match forward_chan.send_htlc(forward_info.amt_to_forward, forward_info.payment_hash, forward_info.outgoing_cltv_value, forward_info.onion_packet.unwrap()) {
865 let chan_update = self.get_channel_update(forward_chan).unwrap();
866 failed_forwards.push((forward_info.payment_hash, 0x1000 | 7, Some(chan_update)));
871 Some(msg) => { add_htlc_msgs.push(msg); },
873 // Nothing to do here...we're waiting on a remote
874 // revoke_and_ack before we can add anymore HTLCs. The Channel
875 // will automatically handle building the update_add_htlc and
876 // commitment_signed messages when we can.
877 // TODO: Do some kind of timer to set the channel as !is_live()
878 // as we don't really want others relying on us relaying through
879 // this channel currently :/.
886 if !add_htlc_msgs.is_empty() {
887 let (commitment_msg, monitor) = match forward_chan.send_commitment() {
890 //TODO: Handle...this is bad!
894 new_events.push((Some(monitor), events::Event::SendHTLCs {
895 node_id: forward_chan.get_their_node_id(),
897 commitment_msg: commitment_msg,
901 for forward_info in pending_forwards {
902 new_events.push((None, events::Event::PaymentReceived {
903 payment_hash: forward_info.payment_hash,
904 amt: forward_info.amt_to_forward,
911 for failed_forward in failed_forwards.drain(..) {
912 match failed_forward.2 {
913 None => self.fail_htlc_backwards_internal(self.channel_state.lock().unwrap(), &failed_forward.0, HTLCFailReason::Reason { failure_code: failed_forward.1, data: Vec::new() }),
914 Some(chan_update) => self.fail_htlc_backwards_internal(self.channel_state.lock().unwrap(), &failed_forward.0, HTLCFailReason::Reason { failure_code: failed_forward.1, data: chan_update.encode_with_len() }),
918 if new_events.is_empty() { return }
920 new_events.retain(|event| {
921 if let &Some(ref monitor) = &event.0 {
922 if let Err(_e) = self.monitor.add_update_monitor(monitor.get_funding_txo().unwrap(), monitor.clone()) {
923 unimplemented!();// but def dont push the event...
929 let mut events = self.pending_events.lock().unwrap();
930 events.reserve(new_events.len());
931 for event in new_events.drain(..) {
932 events.push(event.1);
936 /// Indicates that the preimage for payment_hash is unknown after a PaymentReceived event.
937 pub fn fail_htlc_backwards(&self, payment_hash: &[u8; 32]) -> bool {
938 self.fail_htlc_backwards_internal(self.channel_state.lock().unwrap(), payment_hash, HTLCFailReason::Reason { failure_code: 0x4000 | 15, data: Vec::new() })
941 /// Fails an HTLC backwards to the sender of it to us.
942 /// Note that while we take a channel_state lock as input, we do *not* assume consistency here.
943 /// There are several callsites that do stupid things like loop over a list of payment_hashes
944 /// to fail and take the channel_state lock for each iteration (as we take ownership and may
945 /// drop it). In other words, no assumptions are made that entries in claimable_htlcs point to
946 /// still-available channels.
947 fn fail_htlc_backwards_internal(&self, mut channel_state: MutexGuard<ChannelHolder>, payment_hash: &[u8; 32], onion_error: HTLCFailReason) -> bool {
948 let mut pending_htlc = {
949 match channel_state.claimable_htlcs.remove(payment_hash) {
950 Some(pending_htlc) => pending_htlc,
951 None => return false,
956 PendingOutboundHTLC::CycledRoute { source_short_channel_id, incoming_packet_shared_secret, route, session_priv } => {
957 channel_state.claimable_htlcs.insert(payment_hash.clone(), PendingOutboundHTLC::OutboundRoute {
961 pending_htlc = PendingOutboundHTLC::IntermediaryHopData { source_short_channel_id, incoming_packet_shared_secret };
967 PendingOutboundHTLC::CycledRoute { .. } => unreachable!(),
968 PendingOutboundHTLC::OutboundRoute { .. } => {
969 mem::drop(channel_state);
971 let mut pending_events = self.pending_events.lock().unwrap();
972 pending_events.push(events::Event::PaymentFailed {
973 payment_hash: payment_hash.clone()
977 PendingOutboundHTLC::IntermediaryHopData { source_short_channel_id, incoming_packet_shared_secret } => {
978 let err_packet = match onion_error {
979 HTLCFailReason::Reason { failure_code, data } => {
980 let packet = ChannelManager::build_failure_packet(&incoming_packet_shared_secret, failure_code, &data[..]).encode();
981 ChannelManager::encrypt_failure_packet(&incoming_packet_shared_secret, &packet)
983 HTLCFailReason::ErrorPacket { err } => {
984 ChannelManager::encrypt_failure_packet(&incoming_packet_shared_secret, &err.data)
988 let (node_id, fail_msgs) = {
989 let chan_id = match channel_state.short_to_id.get(&source_short_channel_id) {
990 Some(chan_id) => chan_id.clone(),
994 let chan = channel_state.by_id.get_mut(&chan_id).unwrap();
995 match chan.get_update_fail_htlc_and_commit(payment_hash, err_packet) {
996 Ok(msg) => (chan.get_their_node_id(), msg),
998 //TODO: Do something with e?
1005 Some((msg, commitment_msg, chan_monitor)) => {
1006 mem::drop(channel_state);
1008 if let Err(_e) = self.monitor.add_update_monitor(chan_monitor.get_funding_txo().unwrap(), chan_monitor) {
1009 unimplemented!();// but def dont push the event...
1012 let mut pending_events = self.pending_events.lock().unwrap();
1013 //TODO: replace by HandleError ? UpdateFailHTLC in handle_update_add_htlc need also to build a CommitmentSigned
1014 pending_events.push(events::Event::SendFailHTLC {
1017 commitment_msg: commitment_msg,
1028 /// Provides a payment preimage in response to a PaymentReceived event, returning true and
1029 /// generating message events for the net layer to claim the payment, if possible. Thus, you
1030 /// should probably kick the net layer to go send messages if this returns true!
1031 /// May panic if called except in response to a PaymentReceived event.
1032 pub fn claim_funds(&self, payment_preimage: [u8; 32]) -> bool {
1033 self.claim_funds_internal(payment_preimage, true)
1035 fn claim_funds_internal(&self, payment_preimage: [u8; 32], from_user: bool) -> bool {
1036 let mut sha = Sha256::new();
1037 sha.input(&payment_preimage);
1038 let mut payment_hash = [0; 32];
1039 sha.result(&mut payment_hash);
1041 let mut channel_state = self.channel_state.lock().unwrap();
1042 let mut pending_htlc = {
1043 match channel_state.claimable_htlcs.remove(&payment_hash) {
1044 Some(pending_htlc) => pending_htlc,
1045 None => return false,
1049 match pending_htlc {
1050 PendingOutboundHTLC::CycledRoute { source_short_channel_id, incoming_packet_shared_secret, route, session_priv } => {
1051 if from_user { // This was the end hop back to us
1052 pending_htlc = PendingOutboundHTLC::IntermediaryHopData { source_short_channel_id, incoming_packet_shared_secret };
1053 channel_state.claimable_htlcs.insert(payment_hash, PendingOutboundHTLC::OutboundRoute { route, session_priv });
1054 } else { // This came from the first upstream node
1055 // Bank error in our favor! Maybe we should tell the user this somehow???
1056 pending_htlc = PendingOutboundHTLC::OutboundRoute { route, session_priv };
1057 channel_state.claimable_htlcs.insert(payment_hash, PendingOutboundHTLC::IntermediaryHopData { source_short_channel_id, incoming_packet_shared_secret });
1063 match pending_htlc {
1064 PendingOutboundHTLC::CycledRoute { .. } => unreachable!(),
1065 PendingOutboundHTLC::OutboundRoute { .. } => {
1067 panic!("Called claim_funds with a preimage for an outgoing payment. There is nothing we can do with this, and something is seriously wrong if you knew this...");
1069 mem::drop(channel_state);
1070 let mut pending_events = self.pending_events.lock().unwrap();
1071 pending_events.push(events::Event::PaymentSent {
1076 PendingOutboundHTLC::IntermediaryHopData { source_short_channel_id, .. } => {
1077 let (node_id, fulfill_msgs) = {
1078 let chan_id = match channel_state.short_to_id.get(&source_short_channel_id) {
1079 Some(chan_id) => chan_id.clone(),
1081 // TODO: There is probably a channel manager somewhere that needs to
1082 // learn the preimage as the channel already hit the chain and that's
1088 let chan = channel_state.by_id.get_mut(&chan_id).unwrap();
1089 match chan.get_update_fulfill_htlc_and_commit(payment_preimage) {
1090 Ok(msg) => (chan.get_their_node_id(), msg),
1092 // TODO: There is probably a channel manager somewhere that needs to
1093 // learn the preimage as the channel may be about to hit the chain.
1094 //TODO: Do something with e?
1100 mem::drop(channel_state);
1101 if let Some(chan_monitor) = fulfill_msgs.1 {
1102 if let Err(_e) = self.monitor.add_update_monitor(chan_monitor.get_funding_txo().unwrap(), chan_monitor) {
1103 unimplemented!();// but def dont push the event...
1107 if let Some((msg, commitment_msg)) = fulfill_msgs.0 {
1108 let mut pending_events = self.pending_events.lock().unwrap();
1109 pending_events.push(events::Event::SendFulfillHTLC {
1120 /// Gets the node_id held by this ChannelManager
1121 pub fn get_our_node_id(&self) -> PublicKey {
1122 PublicKey::from_secret_key(&self.secp_ctx, &self.our_network_key).unwrap()
1125 /// Used to restore channels to normal operation after a
1126 /// ChannelMonitorUpdateErr::TemporaryFailure was returned from a channel monitor update
1128 pub fn test_restore_channel_monitor(&self) {
1133 impl events::EventsProvider for ChannelManager {
1134 fn get_and_clear_pending_events(&self) -> Vec<events::Event> {
1135 let mut pending_events = self.pending_events.lock().unwrap();
1136 let mut ret = Vec::new();
1137 mem::swap(&mut ret, &mut *pending_events);
1142 impl ChainListener for ChannelManager {
1143 fn block_connected(&self, header: &BlockHeader, height: u32, txn_matched: &[&Transaction], indexes_of_txn_matched: &[u32]) {
1144 let mut new_events = Vec::new();
1145 let mut failed_channels = Vec::new();
1147 let mut channel_lock = self.channel_state.lock().unwrap();
1148 let channel_state = channel_lock.borrow_parts();
1149 let short_to_id = channel_state.short_to_id;
1150 channel_state.by_id.retain(|_, channel| {
1151 let chan_res = channel.block_connected(header, height, txn_matched, indexes_of_txn_matched);
1152 if let Ok(Some(funding_locked)) = chan_res {
1153 let announcement_sigs = match self.get_announcement_sigs(channel) {
1156 log_error!(self, "Got error handling message: {}!", e.err);
1157 //TODO: push e on events and blow up the channel (it has bad keys)
1161 new_events.push(events::Event::SendFundingLocked {
1162 node_id: channel.get_their_node_id(),
1163 msg: funding_locked,
1164 announcement_sigs: announcement_sigs
1166 short_to_id.insert(channel.get_short_channel_id().unwrap(), channel.channel_id());
1167 } else if let Err(e) = chan_res {
1168 new_events.push(events::Event::HandleError {
1169 node_id: channel.get_their_node_id(),
1172 if channel.is_shutdown() {
1176 if let Some(funding_txo) = channel.get_funding_txo() {
1177 for tx in txn_matched {
1178 for inp in tx.input.iter() {
1179 if inp.prev_hash == funding_txo.txid && inp.prev_index == funding_txo.index as u32 {
1180 if let Some(short_id) = channel.get_short_channel_id() {
1181 short_to_id.remove(&short_id);
1183 // It looks like our counterparty went on-chain. We go ahead and
1184 // broadcast our latest local state as well here, just in case its
1185 // some kind of SPV attack, though we expect these to be dropped.
1186 failed_channels.push(channel.force_shutdown());
1187 if let Ok(update) = self.get_channel_update(&channel) {
1188 new_events.push(events::Event::BroadcastChannelUpdate {
1197 if channel.is_funding_initiated() && channel.channel_monitor().would_broadcast_at_height(height) {
1198 if let Some(short_id) = channel.get_short_channel_id() {
1199 short_to_id.remove(&short_id);
1201 failed_channels.push(channel.force_shutdown());
1202 // If would_broadcast_at_height() is true, the channel_monitor will broadcast
1203 // the latest local tx for us, so we should skip that here (it doesn't really
1204 // hurt anything, but does make tests a bit simpler).
1205 failed_channels.last_mut().unwrap().0 = Vec::new();
1206 if let Ok(update) = self.get_channel_update(&channel) {
1207 new_events.push(events::Event::BroadcastChannelUpdate {
1216 for failure in failed_channels.drain(..) {
1217 self.finish_force_close_channel(failure);
1219 let mut pending_events = self.pending_events.lock().unwrap();
1220 for funding_locked in new_events.drain(..) {
1221 pending_events.push(funding_locked);
1223 self.latest_block_height.store(height as usize, Ordering::Release);
1226 /// We force-close the channel without letting our counterparty participate in the shutdown
1227 fn block_disconnected(&self, header: &BlockHeader) {
1228 let mut new_events = Vec::new();
1229 let mut failed_channels = Vec::new();
1231 let mut channel_lock = self.channel_state.lock().unwrap();
1232 let channel_state = channel_lock.borrow_parts();
1233 let short_to_id = channel_state.short_to_id;
1234 channel_state.by_id.retain(|_, v| {
1235 if v.block_disconnected(header) {
1236 if let Some(short_id) = v.get_short_channel_id() {
1237 short_to_id.remove(&short_id);
1239 failed_channels.push(v.force_shutdown());
1240 if let Ok(update) = self.get_channel_update(&v) {
1241 new_events.push(events::Event::BroadcastChannelUpdate {
1251 for failure in failed_channels.drain(..) {
1252 self.finish_force_close_channel(failure);
1254 if !new_events.is_empty() {
1255 let mut pending_events = self.pending_events.lock().unwrap();
1256 for funding_locked in new_events.drain(..) {
1257 pending_events.push(funding_locked);
1260 self.latest_block_height.fetch_sub(1, Ordering::AcqRel);
1264 impl ChannelMessageHandler for ChannelManager {
1265 //TODO: Handle errors and close channel (or so)
1266 fn handle_open_channel(&self, their_node_id: &PublicKey, msg: &msgs::OpenChannel) -> Result<msgs::AcceptChannel, HandleError> {
1267 if msg.chain_hash != self.genesis_hash {
1268 return Err(HandleError{err: "Unknown genesis block hash", action: None});
1270 let mut channel_state = self.channel_state.lock().unwrap();
1271 if channel_state.by_id.contains_key(&msg.temporary_channel_id) {
1272 return Err(HandleError{err: "temporary_channel_id collision!", action: None});
1275 let chan_keys = if cfg!(feature = "fuzztarget") {
1277 funding_key: SecretKey::from_slice(&self.secp_ctx, &[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, 1, 0]).unwrap(),
1278 revocation_base_key: SecretKey::from_slice(&self.secp_ctx, &[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, 2, 0]).unwrap(),
1279 payment_base_key: SecretKey::from_slice(&self.secp_ctx, &[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, 3, 0]).unwrap(),
1280 delayed_payment_base_key: SecretKey::from_slice(&self.secp_ctx, &[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, 4, 0]).unwrap(),
1281 htlc_base_key: SecretKey::from_slice(&self.secp_ctx, &[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, 5, 0]).unwrap(),
1282 channel_close_key: SecretKey::from_slice(&self.secp_ctx, &[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, 6, 0]).unwrap(),
1283 channel_monitor_claim_key: SecretKey::from_slice(&self.secp_ctx, &[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, 7, 0]).unwrap(),
1284 commitment_seed: [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, 0, 0],
1287 let mut key_seed = [0u8; 32];
1288 rng::fill_bytes(&mut key_seed);
1289 match ChannelKeys::new_from_seed(&key_seed) {
1291 Err(_) => panic!("RNG is busted!")
1295 let channel = Channel::new_from_req(&*self.fee_estimator, chan_keys, their_node_id.clone(), msg, 0, false, self.announce_channels_publicly, Arc::clone(&self.logger))?;
1296 let accept_msg = channel.get_accept_channel()?;
1297 channel_state.by_id.insert(channel.channel_id(), channel);
1301 fn handle_accept_channel(&self, their_node_id: &PublicKey, msg: &msgs::AcceptChannel) -> Result<(), HandleError> {
1302 let (value, output_script, user_id) = {
1303 let mut channel_state = self.channel_state.lock().unwrap();
1304 match channel_state.by_id.get_mut(&msg.temporary_channel_id) {
1306 if chan.get_their_node_id() != *their_node_id {
1307 return Err(HandleError{err: "Got a message for a channel from the wrong node!", action: None})
1309 chan.accept_channel(&msg)?;
1310 (chan.get_value_satoshis(), chan.get_funding_redeemscript().to_v0_p2wsh(), chan.get_user_id())
1312 None => return Err(HandleError{err: "Failed to find corresponding channel", action: None})
1315 let mut pending_events = self.pending_events.lock().unwrap();
1316 pending_events.push(events::Event::FundingGenerationReady {
1317 temporary_channel_id: msg.temporary_channel_id,
1318 channel_value_satoshis: value,
1319 output_script: output_script,
1320 user_channel_id: user_id,
1325 fn handle_funding_created(&self, their_node_id: &PublicKey, msg: &msgs::FundingCreated) -> Result<msgs::FundingSigned, HandleError> {
1326 let (chan, funding_msg, monitor_update) = {
1327 let mut channel_state = self.channel_state.lock().unwrap();
1328 match channel_state.by_id.entry(msg.temporary_channel_id.clone()) {
1329 hash_map::Entry::Occupied(mut chan) => {
1330 if chan.get().get_their_node_id() != *their_node_id {
1331 return Err(HandleError{err: "Got a message for a channel from the wrong node!", action: None})
1333 match chan.get_mut().funding_created(msg) {
1334 Ok((funding_msg, monitor_update)) => {
1335 (chan.remove(), funding_msg, monitor_update)
1338 //TODO: Possibly remove the channel depending on e.action
1343 hash_map::Entry::Vacant(_) => return Err(HandleError{err: "Failed to find corresponding channel", action: None})
1345 }; // Release channel lock for install_watch_outpoint call,
1346 // note that this means if the remote end is misbehaving and sends a message for the same
1347 // channel back-to-back with funding_created, we'll end up thinking they sent a message
1348 // for a bogus channel.
1349 if let Err(_e) = self.monitor.add_update_monitor(monitor_update.get_funding_txo().unwrap(), monitor_update) {
1352 let mut channel_state = self.channel_state.lock().unwrap();
1353 channel_state.by_id.insert(funding_msg.channel_id, chan);
1357 fn handle_funding_signed(&self, their_node_id: &PublicKey, msg: &msgs::FundingSigned) -> Result<(), HandleError> {
1358 let (funding_txo, user_id, monitor) = {
1359 let mut channel_state = self.channel_state.lock().unwrap();
1360 match channel_state.by_id.get_mut(&msg.channel_id) {
1362 if chan.get_their_node_id() != *their_node_id {
1363 return Err(HandleError{err: "Got a message for a channel from the wrong node!", action: None})
1365 let chan_monitor = chan.funding_signed(&msg)?;
1366 (chan.get_funding_txo().unwrap(), chan.get_user_id(), chan_monitor)
1368 None => return Err(HandleError{err: "Failed to find corresponding channel", action: None})
1371 if let Err(_e) = self.monitor.add_update_monitor(monitor.get_funding_txo().unwrap(), monitor) {
1374 let mut pending_events = self.pending_events.lock().unwrap();
1375 pending_events.push(events::Event::FundingBroadcastSafe {
1376 funding_txo: funding_txo,
1377 user_channel_id: user_id,
1382 fn handle_funding_locked(&self, their_node_id: &PublicKey, msg: &msgs::FundingLocked) -> Result<Option<msgs::AnnouncementSignatures>, HandleError> {
1383 let mut channel_state = self.channel_state.lock().unwrap();
1384 match channel_state.by_id.get_mut(&msg.channel_id) {
1386 if chan.get_their_node_id() != *their_node_id {
1387 return Err(HandleError{err: "Got a message for a channel from the wrong node!", action: None})
1389 chan.funding_locked(&msg)?;
1390 return Ok(self.get_announcement_sigs(chan)?);
1392 None => return Err(HandleError{err: "Failed to find corresponding channel", action: None})
1396 fn handle_shutdown(&self, their_node_id: &PublicKey, msg: &msgs::Shutdown) -> Result<(Option<msgs::Shutdown>, Option<msgs::ClosingSigned>), HandleError> {
1397 let (res, chan_option) = {
1398 let mut channel_state_lock = self.channel_state.lock().unwrap();
1399 let channel_state = channel_state_lock.borrow_parts();
1401 match channel_state.by_id.entry(msg.channel_id.clone()) {
1402 hash_map::Entry::Occupied(mut chan_entry) => {
1403 if chan_entry.get().get_their_node_id() != *their_node_id {
1404 return Err(HandleError{err: "Got a message for a channel from the wrong node!", action: None})
1406 let res = chan_entry.get_mut().shutdown(&*self.fee_estimator, &msg)?;
1407 if chan_entry.get().is_shutdown() {
1408 if let Some(short_id) = chan_entry.get().get_short_channel_id() {
1409 channel_state.short_to_id.remove(&short_id);
1411 (res, Some(chan_entry.remove_entry().1))
1412 } else { (res, None) }
1414 hash_map::Entry::Vacant(_) => return Err(HandleError{err: "Failed to find corresponding channel", action: None})
1417 for payment_hash in res.2 {
1418 // unknown_next_peer...I dunno who that is anymore....
1419 self.fail_htlc_backwards_internal(self.channel_state.lock().unwrap(), &payment_hash, HTLCFailReason::Reason { failure_code: 0x4000 | 10, data: Vec::new() });
1421 if let Some(chan) = chan_option {
1422 if let Ok(update) = self.get_channel_update(&chan) {
1423 let mut events = self.pending_events.lock().unwrap();
1424 events.push(events::Event::BroadcastChannelUpdate {
1432 fn handle_closing_signed(&self, their_node_id: &PublicKey, msg: &msgs::ClosingSigned) -> Result<Option<msgs::ClosingSigned>, HandleError> {
1433 let (res, chan_option) = {
1434 let mut channel_state_lock = self.channel_state.lock().unwrap();
1435 let channel_state = channel_state_lock.borrow_parts();
1436 match channel_state.by_id.entry(msg.channel_id.clone()) {
1437 hash_map::Entry::Occupied(mut chan_entry) => {
1438 if chan_entry.get().get_their_node_id() != *their_node_id {
1439 return Err(HandleError{err: "Got a message for a channel from the wrong node!", action: None})
1441 let res = chan_entry.get_mut().closing_signed(&*self.fee_estimator, &msg)?;
1442 if res.1.is_some() {
1443 // We're done with this channel, we've got a signed closing transaction and
1444 // will send the closing_signed back to the remote peer upon return. This
1445 // also implies there are no pending HTLCs left on the channel, so we can
1446 // fully delete it from tracking (the channel monitor is still around to
1447 // watch for old state broadcasts)!
1448 if let Some(short_id) = chan_entry.get().get_short_channel_id() {
1449 channel_state.short_to_id.remove(&short_id);
1451 (res, Some(chan_entry.remove_entry().1))
1452 } else { (res, None) }
1454 hash_map::Entry::Vacant(_) => return Err(HandleError{err: "Failed to find corresponding channel", action: None})
1457 if let Some(broadcast_tx) = res.1 {
1458 self.tx_broadcaster.broadcast_transaction(&broadcast_tx);
1460 if let Some(chan) = chan_option {
1461 if let Ok(update) = self.get_channel_update(&chan) {
1462 let mut events = self.pending_events.lock().unwrap();
1463 events.push(events::Event::BroadcastChannelUpdate {
1471 fn handle_update_add_htlc(&self, their_node_id: &PublicKey, msg: &msgs::UpdateAddHTLC) -> Result<(), msgs::HandleError> {
1472 //TODO: BOLT 4 points out a specific attack where a peer may re-send an onion packet and
1473 //determine the state of the payment based on our response/if we forward anything/the time
1474 //we take to respond. We should take care to avoid allowing such an attack.
1476 //TODO: There exists a further attack where a node may garble the onion data, forward it to
1477 //us repeatedly garbled in different ways, and compare our error messages, which are
1478 //encrypted with the same key. Its not immediately obvious how to usefully exploit that,
1479 //but we should prevent it anyway.
1481 let shared_secret = SharedSecret::new(&self.secp_ctx, &msg.onion_routing_packet.public_key, &self.our_network_key);
1482 let (rho, mu) = ChannelManager::gen_rho_mu_from_shared_secret(&shared_secret);
1484 macro_rules! get_onion_hash {
1487 let mut sha = Sha256::new();
1488 sha.input(&msg.onion_routing_packet.hop_data);
1489 let mut onion_hash = [0; 32];
1490 sha.result(&mut onion_hash);
1496 macro_rules! return_err {
1497 ($msg: expr, $err_code: expr, $data: expr) => {
1498 return Err(msgs::HandleError {
1500 action: Some(msgs::ErrorAction::UpdateFailHTLC {
1501 msg: msgs::UpdateFailHTLC {
1502 channel_id: msg.channel_id,
1503 htlc_id: msg.htlc_id,
1504 reason: ChannelManager::build_first_hop_failure_packet(&shared_secret, $err_code, $data),
1511 if msg.onion_routing_packet.version != 0 {
1512 //TODO: Spec doesn't indicate if we should only hash hop_data here (and in other
1513 //sha256_of_onion error data packets), or the entire onion_routing_packet. Either way,
1514 //the hash doesn't really serve any purpuse - in the case of hashing all data, the
1515 //receiving node would have to brute force to figure out which version was put in the
1516 //packet by the node that send us the message, in the case of hashing the hop_data, the
1517 //node knows the HMAC matched, so they already know what is there...
1518 return_err!("Unknown onion packet version", 0x8000 | 0x4000 | 4, &get_onion_hash!());
1521 let mut hmac = Hmac::new(Sha256::new(), &mu);
1522 hmac.input(&msg.onion_routing_packet.hop_data);
1523 hmac.input(&msg.payment_hash);
1524 if hmac.result() != MacResult::new(&msg.onion_routing_packet.hmac) {
1525 return_err!("HMAC Check failed", 0x8000 | 0x4000 | 5, &get_onion_hash!());
1528 let mut chacha = ChaCha20::new(&rho, &[0u8; 8]);
1529 let next_hop_data = {
1530 let mut decoded = [0; 65];
1531 chacha.process(&msg.onion_routing_packet.hop_data[0..65], &mut decoded);
1532 match msgs::OnionHopData::decode(&decoded[..]) {
1534 let error_code = match err {
1535 msgs::DecodeError::UnknownRealmByte => 0x4000 | 1,
1536 _ => 0x2000 | 2, // Should never happen
1538 return_err!("Unable to decode our hop data", error_code, &[0;0]);
1544 //TODO: Check that msg.cltv_expiry is within acceptable bounds!
1546 let mut pending_forward_info = if next_hop_data.hmac == [0; 32] {
1548 if next_hop_data.data.amt_to_forward != msg.amount_msat {
1549 return_err!("Upstream node sent less than we were supposed to receive in payment", 19, &byte_utils::be64_to_array(msg.amount_msat));
1551 if next_hop_data.data.outgoing_cltv_value != msg.cltv_expiry {
1552 return_err!("Upstream node set CLTV to the wrong value", 18, &byte_utils::be32_to_array(msg.cltv_expiry));
1555 // Note that we could obviously respond immediately with an update_fulfill_htlc
1556 // message, however that would leak that we are the recipient of this payment, so
1557 // instead we stay symmetric with the forwarding case, only responding (after a
1558 // delay) once they've send us a commitment_signed!
1560 PendingForwardHTLCInfo {
1562 payment_hash: msg.payment_hash.clone(),
1563 short_channel_id: 0,
1564 prev_short_channel_id: 0,
1565 amt_to_forward: next_hop_data.data.amt_to_forward,
1566 outgoing_cltv_value: next_hop_data.data.outgoing_cltv_value,
1569 let mut new_packet_data = [0; 20*65];
1570 chacha.process(&msg.onion_routing_packet.hop_data[65..], &mut new_packet_data[0..19*65]);
1571 chacha.process(&ChannelManager::ZERO[0..65], &mut new_packet_data[19*65..]);
1573 let mut new_pubkey = msg.onion_routing_packet.public_key.clone();
1575 let blinding_factor = {
1576 let mut sha = Sha256::new();
1577 sha.input(&new_pubkey.serialize()[..]);
1578 sha.input(&shared_secret[..]);
1579 let mut res = [0u8; 32];
1580 sha.result(&mut res);
1581 match SecretKey::from_slice(&self.secp_ctx, &res) {
1583 // Return temporary node failure as its technically our issue, not the
1585 return_err!("Blinding factor is an invalid private key", 0x2000 | 2, &[0;0]);
1591 match new_pubkey.mul_assign(&self.secp_ctx, &blinding_factor) {
1593 // Return temporary node failure as its technically our issue, not the
1595 return_err!("New blinding factor is an invalid private key", 0x2000 | 2, &[0;0]);
1600 let outgoing_packet = msgs::OnionPacket {
1602 public_key: new_pubkey,
1603 hop_data: new_packet_data,
1604 hmac: next_hop_data.hmac.clone(),
1607 //TODO: Check amt_to_forward and outgoing_cltv_value are within acceptable ranges!
1609 PendingForwardHTLCInfo {
1610 onion_packet: Some(outgoing_packet),
1611 payment_hash: msg.payment_hash.clone(),
1612 short_channel_id: next_hop_data.data.short_channel_id,
1613 prev_short_channel_id: 0,
1614 amt_to_forward: next_hop_data.data.amt_to_forward,
1615 outgoing_cltv_value: next_hop_data.data.outgoing_cltv_value,
1619 let mut channel_state_lock = self.channel_state.lock().unwrap();
1620 let channel_state = channel_state_lock.borrow_parts();
1622 if pending_forward_info.onion_packet.is_some() { // If short_channel_id is 0 here, we'll reject them in the body here
1623 let forwarding_id = match channel_state.short_to_id.get(&pending_forward_info.short_channel_id) {
1625 return_err!("Don't have available channel for forwarding as requested.", 0x4000 | 10, &[0;0]);
1627 Some(id) => id.clone(),
1629 let chan = channel_state.by_id.get_mut(&forwarding_id).unwrap();
1630 if !chan.is_live() {
1631 let chan_update = self.get_channel_update(chan).unwrap();
1632 return_err!("Forwarding channel is not in a ready state.", 0x1000 | 7, &chan_update.encode_with_len()[..]);
1636 let claimable_htlcs_entry = channel_state.claimable_htlcs.entry(msg.payment_hash.clone());
1638 // We dont correctly handle payments that route through us twice on their way to their
1639 // destination. That's OK since those nodes are probably busted or trying to do network
1640 // mapping through repeated loops. In either case, we want them to stop talking to us, so
1641 // we send permanent_node_failure.
1642 if let &hash_map::Entry::Occupied(ref e) = &claimable_htlcs_entry {
1643 let mut acceptable_cycle = false;
1644 if let &PendingOutboundHTLC::OutboundRoute { .. } = e.get() {
1645 acceptable_cycle = pending_forward_info.short_channel_id == 0;
1647 if !acceptable_cycle {
1648 return_err!("Payment looped through us twice", 0x4000 | 0x2000 | 2, &[0;0]);
1652 let (source_short_channel_id, res) = match channel_state.by_id.get_mut(&msg.channel_id) {
1654 if chan.get_their_node_id() != *their_node_id {
1655 return Err(HandleError{err: "Got a message for a channel from the wrong node!", action: None})
1657 if !chan.is_usable() {
1658 return Err(HandleError{err: "Channel not yet available for receiving HTLCs", action: None});
1660 let short_channel_id = chan.get_short_channel_id().unwrap();
1661 pending_forward_info.prev_short_channel_id = short_channel_id;
1662 (short_channel_id, chan.update_add_htlc(&msg, pending_forward_info)?)
1664 None => return Err(HandleError{err: "Failed to find corresponding channel", action: None}),
1667 match claimable_htlcs_entry {
1668 hash_map::Entry::Occupied(mut e) => {
1669 let outbound_route = e.get_mut();
1670 let (route, session_priv) = match outbound_route {
1671 &mut PendingOutboundHTLC::OutboundRoute { ref route, ref session_priv } => {
1672 (route.clone(), session_priv.clone())
1674 _ => unreachable!(),
1676 *outbound_route = PendingOutboundHTLC::CycledRoute {
1677 source_short_channel_id,
1678 incoming_packet_shared_secret: shared_secret,
1683 hash_map::Entry::Vacant(e) => {
1684 e.insert(PendingOutboundHTLC::IntermediaryHopData {
1685 source_short_channel_id,
1686 incoming_packet_shared_secret: shared_secret,
1694 fn handle_update_fulfill_htlc(&self, their_node_id: &PublicKey, msg: &msgs::UpdateFulfillHTLC) -> Result<(), HandleError> {
1695 //TODO: Delay the claimed_funds relaying just like we do outbound relay!
1696 // Claim funds first, cause we don't really care if the channel we received the message on
1697 // is broken, we may have enough info to get our own money!
1698 self.claim_funds_internal(msg.payment_preimage.clone(), false);
1700 let mut channel_state = self.channel_state.lock().unwrap();
1701 match channel_state.by_id.get_mut(&msg.channel_id) {
1703 if chan.get_their_node_id() != *their_node_id {
1704 return Err(HandleError{err: "Got a message for a channel from the wrong node!", action: None})
1706 chan.update_fulfill_htlc(&msg)
1708 None => return Err(HandleError{err: "Failed to find corresponding channel", action: None})
1712 fn handle_update_fail_htlc(&self, their_node_id: &PublicKey, msg: &msgs::UpdateFailHTLC) -> Result<Option<msgs::HTLCFailChannelUpdate>, HandleError> {
1713 let mut channel_state = self.channel_state.lock().unwrap();
1714 let payment_hash = match channel_state.by_id.get_mut(&msg.channel_id) {
1716 if chan.get_their_node_id() != *their_node_id {
1717 return Err(HandleError{err: "Got a message for a channel from the wrong node!", action: None})
1719 chan.update_fail_htlc(&msg, HTLCFailReason::ErrorPacket { err: msg.reason.clone() })
1721 None => return Err(HandleError{err: "Failed to find corresponding channel", action: None})
1724 if let Some(pending_htlc) = channel_state.claimable_htlcs.get(&payment_hash) {
1725 match pending_htlc {
1726 &PendingOutboundHTLC::OutboundRoute { ref route, ref session_priv } => {
1727 // Handle packed channel/node updates for passing back for the route handler
1728 let mut packet_decrypted = msg.reason.data.clone();
1730 Self::construct_onion_keys_callback(&self.secp_ctx, &route, &session_priv, |shared_secret, _, _, route_hop| {
1731 if res.is_some() { return; }
1733 let ammag = ChannelManager::gen_ammag_from_shared_secret(&shared_secret);
1735 let mut decryption_tmp = Vec::with_capacity(packet_decrypted.len());
1736 decryption_tmp.resize(packet_decrypted.len(), 0);
1737 let mut chacha = ChaCha20::new(&ammag, &[0u8; 8]);
1738 chacha.process(&packet_decrypted, &mut decryption_tmp[..]);
1739 packet_decrypted = decryption_tmp;
1741 if let Ok(err_packet) = msgs::DecodedOnionErrorPacket::decode(&packet_decrypted) {
1742 if err_packet.failuremsg.len() >= 2 {
1743 let um = ChannelManager::gen_um_from_shared_secret(&shared_secret);
1745 let mut hmac = Hmac::new(Sha256::new(), &um);
1746 hmac.input(&err_packet.encode()[32..]);
1747 let mut calc_tag = [0u8; 32];
1748 hmac.raw_result(&mut calc_tag);
1749 if crypto::util::fixed_time_eq(&calc_tag, &err_packet.hmac) {
1750 const UNKNOWN_CHAN: u16 = 0x4000|10;
1751 const TEMP_CHAN_FAILURE: u16 = 0x4000|7;
1752 match byte_utils::slice_to_be16(&err_packet.failuremsg[0..2]) {
1753 TEMP_CHAN_FAILURE => {
1754 if err_packet.failuremsg.len() >= 4 {
1755 let update_len = byte_utils::slice_to_be16(&err_packet.failuremsg[2..4]) as usize;
1756 if err_packet.failuremsg.len() >= 4 + update_len {
1757 if let Ok(chan_update) = msgs::ChannelUpdate::decode(&err_packet.failuremsg[4..4 + update_len]) {
1758 res = Some(msgs::HTLCFailChannelUpdate::ChannelUpdateMessage {
1766 // No such next-hop. We know this came from the
1767 // current node as the HMAC validated.
1768 res = Some(msgs::HTLCFailChannelUpdate::ChannelClosed {
1769 short_channel_id: route_hop.short_channel_id
1772 _ => {}, //TODO: Enumerate all of these!
1787 fn handle_update_fail_malformed_htlc(&self, their_node_id: &PublicKey, msg: &msgs::UpdateFailMalformedHTLC) -> Result<(), HandleError> {
1788 let mut channel_state = self.channel_state.lock().unwrap();
1789 match channel_state.by_id.get_mut(&msg.channel_id) {
1791 if chan.get_their_node_id() != *their_node_id {
1792 return Err(HandleError{err: "Got a message for a channel from the wrong node!", action: None})
1794 chan.update_fail_malformed_htlc(&msg, HTLCFailReason::Reason { failure_code: msg.failure_code, data: Vec::new() })
1796 None => return Err(HandleError{err: "Failed to find corresponding channel", action: None})
1800 fn handle_commitment_signed(&self, their_node_id: &PublicKey, msg: &msgs::CommitmentSigned) -> Result<(msgs::RevokeAndACK, Option<msgs::CommitmentSigned>), HandleError> {
1801 let (revoke_and_ack, commitment_signed, chan_monitor) = {
1802 let mut channel_state = self.channel_state.lock().unwrap();
1803 match channel_state.by_id.get_mut(&msg.channel_id) {
1805 if chan.get_their_node_id() != *their_node_id {
1806 return Err(HandleError{err: "Got a message for a channel from the wrong node!", action: None})
1808 chan.commitment_signed(&msg)?
1810 None => return Err(HandleError{err: "Failed to find corresponding channel", action: None})
1813 if let Err(_e) = self.monitor.add_update_monitor(chan_monitor.get_funding_txo().unwrap(), chan_monitor) {
1817 Ok((revoke_and_ack, commitment_signed))
1820 fn handle_revoke_and_ack(&self, their_node_id: &PublicKey, msg: &msgs::RevokeAndACK) -> Result<Option<msgs::CommitmentUpdate>, HandleError> {
1821 let (res, mut pending_forwards, mut pending_failures, chan_monitor) = {
1822 let mut channel_state = self.channel_state.lock().unwrap();
1823 match channel_state.by_id.get_mut(&msg.channel_id) {
1825 if chan.get_their_node_id() != *their_node_id {
1826 return Err(HandleError{err: "Got a message for a channel from the wrong node!", action: None})
1828 chan.revoke_and_ack(&msg)?
1830 None => return Err(HandleError{err: "Failed to find corresponding channel", action: None})
1833 if let Err(_e) = self.monitor.add_update_monitor(chan_monitor.get_funding_txo().unwrap(), chan_monitor) {
1836 for failure in pending_failures.drain(..) {
1837 self.fail_htlc_backwards_internal(self.channel_state.lock().unwrap(), &failure.0, failure.1);
1840 let mut forward_event = None;
1841 if !pending_forwards.is_empty() {
1842 let mut channel_state = self.channel_state.lock().unwrap();
1843 if channel_state.forward_htlcs.is_empty() {
1844 forward_event = Some(Instant::now() + Duration::from_millis(((rng::rand_f32() * 4.0 + 1.0) * MIN_HTLC_RELAY_HOLDING_CELL_MILLIS as f32) as u64));
1845 channel_state.next_forward = forward_event.unwrap();
1847 for forward_info in pending_forwards.drain(..) {
1848 match channel_state.forward_htlcs.entry(forward_info.short_channel_id) {
1849 hash_map::Entry::Occupied(mut entry) => {
1850 entry.get_mut().push(forward_info);
1852 hash_map::Entry::Vacant(entry) => {
1853 entry.insert(vec!(forward_info));
1858 match forward_event {
1860 let mut pending_events = self.pending_events.lock().unwrap();
1861 pending_events.push(events::Event::PendingHTLCsForwardable {
1862 time_forwardable: time
1871 fn handle_update_fee(&self, their_node_id: &PublicKey, msg: &msgs::UpdateFee) -> Result<(), HandleError> {
1872 let mut channel_state = self.channel_state.lock().unwrap();
1873 match channel_state.by_id.get_mut(&msg.channel_id) {
1875 if chan.get_their_node_id() != *their_node_id {
1876 return Err(HandleError{err: "Got a message for a channel from the wrong node!", action: None})
1878 chan.update_fee(&*self.fee_estimator, &msg)
1880 None => return Err(HandleError{err: "Failed to find corresponding channel", action: None})
1884 fn handle_announcement_signatures(&self, their_node_id: &PublicKey, msg: &msgs::AnnouncementSignatures) -> Result<(), HandleError> {
1885 let (chan_announcement, chan_update) = {
1886 let mut channel_state = self.channel_state.lock().unwrap();
1887 match channel_state.by_id.get_mut(&msg.channel_id) {
1889 if chan.get_their_node_id() != *their_node_id {
1890 return Err(HandleError{err: "Got a message for a channel from the wrong node!", action: None})
1892 if !chan.is_usable() {
1893 return Err(HandleError{err: "Got an announcement_signatures before we were ready for it", action: None });
1896 let our_node_id = self.get_our_node_id();
1897 let (announcement, our_bitcoin_sig) = chan.get_channel_announcement(our_node_id.clone(), self.genesis_hash.clone())?;
1899 let were_node_one = announcement.node_id_1 == our_node_id;
1900 let msghash = Message::from_slice(&Sha256dHash::from_data(&announcement.encode()[..])[..]).unwrap();
1901 secp_call!(self.secp_ctx.verify(&msghash, &msg.node_signature, if were_node_one { &announcement.node_id_2 } else { &announcement.node_id_1 }));
1902 secp_call!(self.secp_ctx.verify(&msghash, &msg.bitcoin_signature, if were_node_one { &announcement.bitcoin_key_2 } else { &announcement.bitcoin_key_1 }));
1904 let our_node_sig = secp_call!(self.secp_ctx.sign(&msghash, &self.our_network_key));
1906 (msgs::ChannelAnnouncement {
1907 node_signature_1: if were_node_one { our_node_sig } else { msg.node_signature },
1908 node_signature_2: if were_node_one { msg.node_signature } else { our_node_sig },
1909 bitcoin_signature_1: if were_node_one { our_bitcoin_sig } else { msg.bitcoin_signature },
1910 bitcoin_signature_2: if were_node_one { msg.bitcoin_signature } else { our_bitcoin_sig },
1911 contents: announcement,
1912 }, self.get_channel_update(chan).unwrap()) // can only fail if we're not in a ready state
1914 None => return Err(HandleError{err: "Failed to find corresponding channel", action: None})
1917 let mut pending_events = self.pending_events.lock().unwrap();
1918 pending_events.push(events::Event::BroadcastChannelAnnouncement { msg: chan_announcement, update_msg: chan_update });
1922 fn peer_disconnected(&self, their_node_id: &PublicKey, no_connection_possible: bool) {
1923 let mut new_events = Vec::new();
1924 let mut failed_channels = Vec::new();
1926 let mut channel_state_lock = self.channel_state.lock().unwrap();
1927 let channel_state = channel_state_lock.borrow_parts();
1928 let short_to_id = channel_state.short_to_id;
1929 if no_connection_possible {
1930 channel_state.by_id.retain(|_, chan| {
1931 if chan.get_their_node_id() == *their_node_id {
1932 if let Some(short_id) = chan.get_short_channel_id() {
1933 short_to_id.remove(&short_id);
1935 failed_channels.push(chan.force_shutdown());
1936 if let Ok(update) = self.get_channel_update(&chan) {
1937 new_events.push(events::Event::BroadcastChannelUpdate {
1947 for chan in channel_state.by_id {
1948 if chan.1.get_their_node_id() == *their_node_id {
1949 //TODO: mark channel disabled (and maybe announce such after a timeout). Also
1950 //fail and wipe any uncommitted outbound HTLCs as those are considered after
1956 for failure in failed_channels.drain(..) {
1957 self.finish_force_close_channel(failure);
1959 if !new_events.is_empty() {
1960 let mut pending_events = self.pending_events.lock().unwrap();
1961 for event in new_events.drain(..) {
1962 pending_events.push(event);
1970 use chain::chaininterface;
1971 use chain::transaction::OutPoint;
1972 use chain::chaininterface::ChainListener;
1973 use ln::channelmanager::{ChannelManager,OnionKeys};
1974 use ln::router::{Route, RouteHop, Router};
1976 use ln::msgs::{MsgEncodable,ChannelMessageHandler,RoutingMessageHandler};
1977 use util::test_utils;
1978 use util::events::{Event, EventsProvider};
1979 use util::logger::Logger;
1981 use bitcoin::util::hash::Sha256dHash;
1982 use bitcoin::blockdata::block::{Block, BlockHeader};
1983 use bitcoin::blockdata::transaction::{Transaction, TxOut};
1984 use bitcoin::network::constants::Network;
1985 use bitcoin::network::serialize::serialize;
1986 use bitcoin::network::serialize::BitcoinHash;
1990 use secp256k1::Secp256k1;
1991 use secp256k1::key::{PublicKey,SecretKey};
1993 use crypto::sha2::Sha256;
1994 use crypto::digest::Digest;
1996 use rand::{thread_rng,Rng};
1998 use std::collections::HashMap;
1999 use std::default::Default;
2000 use std::sync::{Arc, Mutex};
2001 use std::time::Instant;
2004 fn build_test_onion_keys() -> Vec<OnionKeys> {
2005 // Keys from BOLT 4, used in both test vector tests
2006 let secp_ctx = Secp256k1::new();
2011 pubkey: PublicKey::from_slice(&secp_ctx, &hex::decode("02eec7245d6b7d2ccb30380bfbe2a3648cd7a942653f5aa340edcea1f283686619").unwrap()[..]).unwrap(),
2012 short_channel_id: 0, fee_msat: 0, cltv_expiry_delta: 0 // Test vectors are garbage and not generateble from a RouteHop, we fill in payloads manually
2015 pubkey: PublicKey::from_slice(&secp_ctx, &hex::decode("0324653eac434488002cc06bbfb7f10fe18991e35f9fe4302dbea6d2353dc0ab1c").unwrap()[..]).unwrap(),
2016 short_channel_id: 0, fee_msat: 0, cltv_expiry_delta: 0 // Test vectors are garbage and not generateble from a RouteHop, we fill in payloads manually
2019 pubkey: PublicKey::from_slice(&secp_ctx, &hex::decode("027f31ebc5462c1fdce1b737ecff52d37d75dea43ce11c74d25aa297165faa2007").unwrap()[..]).unwrap(),
2020 short_channel_id: 0, fee_msat: 0, cltv_expiry_delta: 0 // Test vectors are garbage and not generateble from a RouteHop, we fill in payloads manually
2023 pubkey: PublicKey::from_slice(&secp_ctx, &hex::decode("032c0b7cf95324a07d05398b240174dc0c2be444d96b159aa6c7f7b1e668680991").unwrap()[..]).unwrap(),
2024 short_channel_id: 0, fee_msat: 0, cltv_expiry_delta: 0 // Test vectors are garbage and not generateble from a RouteHop, we fill in payloads manually
2027 pubkey: PublicKey::from_slice(&secp_ctx, &hex::decode("02edabbd16b41c8371b92ef2f04c1185b4f03b6dcd52ba9b78d9d7c89c8f221145").unwrap()[..]).unwrap(),
2028 short_channel_id: 0, fee_msat: 0, cltv_expiry_delta: 0 // Test vectors are garbage and not generateble from a RouteHop, we fill in payloads manually
2033 let session_priv = SecretKey::from_slice(&secp_ctx, &hex::decode("4141414141414141414141414141414141414141414141414141414141414141").unwrap()[..]).unwrap();
2035 let onion_keys = ChannelManager::construct_onion_keys(&secp_ctx, &route, &session_priv).unwrap();
2036 assert_eq!(onion_keys.len(), route.hops.len());
2041 fn onion_vectors() {
2042 // Packet creation test vectors from BOLT 4
2043 let onion_keys = build_test_onion_keys();
2045 assert_eq!(onion_keys[0].shared_secret[..], hex::decode("53eb63ea8a3fec3b3cd433b85cd62a4b145e1dda09391b348c4e1cd36a03ea66").unwrap()[..]);
2046 assert_eq!(onion_keys[0].blinding_factor[..], hex::decode("2ec2e5da605776054187180343287683aa6a51b4b1c04d6dd49c45d8cffb3c36").unwrap()[..]);
2047 assert_eq!(onion_keys[0].ephemeral_pubkey.serialize()[..], hex::decode("02eec7245d6b7d2ccb30380bfbe2a3648cd7a942653f5aa340edcea1f283686619").unwrap()[..]);
2048 assert_eq!(onion_keys[0].rho, hex::decode("ce496ec94def95aadd4bec15cdb41a740c9f2b62347c4917325fcc6fb0453986").unwrap()[..]);
2049 assert_eq!(onion_keys[0].mu, hex::decode("b57061dc6d0a2b9f261ac410c8b26d64ac5506cbba30267a649c28c179400eba").unwrap()[..]);
2051 assert_eq!(onion_keys[1].shared_secret[..], hex::decode("a6519e98832a0b179f62123b3567c106db99ee37bef036e783263602f3488fae").unwrap()[..]);
2052 assert_eq!(onion_keys[1].blinding_factor[..], hex::decode("bf66c28bc22e598cfd574a1931a2bafbca09163df2261e6d0056b2610dab938f").unwrap()[..]);
2053 assert_eq!(onion_keys[1].ephemeral_pubkey.serialize()[..], hex::decode("028f9438bfbf7feac2e108d677e3a82da596be706cc1cf342b75c7b7e22bf4e6e2").unwrap()[..]);
2054 assert_eq!(onion_keys[1].rho, hex::decode("450ffcabc6449094918ebe13d4f03e433d20a3d28a768203337bc40b6e4b2c59").unwrap()[..]);
2055 assert_eq!(onion_keys[1].mu, hex::decode("05ed2b4a3fb023c2ff5dd6ed4b9b6ea7383f5cfe9d59c11d121ec2c81ca2eea9").unwrap()[..]);
2057 assert_eq!(onion_keys[2].shared_secret[..], hex::decode("3a6b412548762f0dbccce5c7ae7bb8147d1caf9b5471c34120b30bc9c04891cc").unwrap()[..]);
2058 assert_eq!(onion_keys[2].blinding_factor[..], hex::decode("a1f2dadd184eb1627049673f18c6325814384facdee5bfd935d9cb031a1698a5").unwrap()[..]);
2059 assert_eq!(onion_keys[2].ephemeral_pubkey.serialize()[..], hex::decode("03bfd8225241ea71cd0843db7709f4c222f62ff2d4516fd38b39914ab6b83e0da0").unwrap()[..]);
2060 assert_eq!(onion_keys[2].rho, hex::decode("11bf5c4f960239cb37833936aa3d02cea82c0f39fd35f566109c41f9eac8deea").unwrap()[..]);
2061 assert_eq!(onion_keys[2].mu, hex::decode("caafe2820fa00eb2eeb78695ae452eba38f5a53ed6d53518c5c6edf76f3f5b78").unwrap()[..]);
2063 assert_eq!(onion_keys[3].shared_secret[..], hex::decode("21e13c2d7cfe7e18836df50872466117a295783ab8aab0e7ecc8c725503ad02d").unwrap()[..]);
2064 assert_eq!(onion_keys[3].blinding_factor[..], hex::decode("7cfe0b699f35525029ae0fa437c69d0f20f7ed4e3916133f9cacbb13c82ff262").unwrap()[..]);
2065 assert_eq!(onion_keys[3].ephemeral_pubkey.serialize()[..], hex::decode("031dde6926381289671300239ea8e57ffaf9bebd05b9a5b95beaf07af05cd43595").unwrap()[..]);
2066 assert_eq!(onion_keys[3].rho, hex::decode("cbe784ab745c13ff5cffc2fbe3e84424aa0fd669b8ead4ee562901a4a4e89e9e").unwrap()[..]);
2067 assert_eq!(onion_keys[3].mu, hex::decode("5052aa1b3d9f0655a0932e50d42f0c9ba0705142c25d225515c45f47c0036ee9").unwrap()[..]);
2069 assert_eq!(onion_keys[4].shared_secret[..], hex::decode("b5756b9b542727dbafc6765a49488b023a725d631af688fc031217e90770c328").unwrap()[..]);
2070 assert_eq!(onion_keys[4].blinding_factor[..], hex::decode("c96e00dddaf57e7edcd4fb5954be5b65b09f17cb6d20651b4e90315be5779205").unwrap()[..]);
2071 assert_eq!(onion_keys[4].ephemeral_pubkey.serialize()[..], hex::decode("03a214ebd875aab6ddfd77f22c5e7311d7f77f17a169e599f157bbcdae8bf071f4").unwrap()[..]);
2072 assert_eq!(onion_keys[4].rho, hex::decode("034e18b8cc718e8af6339106e706c52d8df89e2b1f7e9142d996acf88df8799b").unwrap()[..]);
2073 assert_eq!(onion_keys[4].mu, hex::decode("8e45e5c61c2b24cb6382444db6698727afb063adecd72aada233d4bf273d975a").unwrap()[..]);
2075 // Test vectors below are flat-out wrong: they claim to set outgoing_cltv_value to non-0 :/
2076 let payloads = vec!(
2077 msgs::OnionHopData {
2079 data: msgs::OnionRealm0HopData {
2080 short_channel_id: 0,
2082 outgoing_cltv_value: 0,
2086 msgs::OnionHopData {
2088 data: msgs::OnionRealm0HopData {
2089 short_channel_id: 0x0101010101010101,
2090 amt_to_forward: 0x0100000001,
2091 outgoing_cltv_value: 0,
2095 msgs::OnionHopData {
2097 data: msgs::OnionRealm0HopData {
2098 short_channel_id: 0x0202020202020202,
2099 amt_to_forward: 0x0200000002,
2100 outgoing_cltv_value: 0,
2104 msgs::OnionHopData {
2106 data: msgs::OnionRealm0HopData {
2107 short_channel_id: 0x0303030303030303,
2108 amt_to_forward: 0x0300000003,
2109 outgoing_cltv_value: 0,
2113 msgs::OnionHopData {
2115 data: msgs::OnionRealm0HopData {
2116 short_channel_id: 0x0404040404040404,
2117 amt_to_forward: 0x0400000004,
2118 outgoing_cltv_value: 0,
2124 let packet = ChannelManager::construct_onion_packet(payloads, onion_keys, &[0x42; 32]).unwrap();
2125 // Just check the final packet encoding, as it includes all the per-hop vectors in it
2127 assert_eq!(packet.encode(), hex::decode("0002eec7245d6b7d2ccb30380bfbe2a3648cd7a942653f5aa340edcea1f283686619e5f14350c2a76fc232b5e46d421e9615471ab9e0bc887beff8c95fdb878f7b3a716a996c7845c93d90e4ecbb9bde4ece2f69425c99e4bc820e44485455f135edc0d10f7d61ab590531cf08000179a333a347f8b4072f216400406bdf3bf038659793d4a1fd7b246979e3150a0a4cb052c9ec69acf0f48c3d39cd55675fe717cb7d80ce721caad69320c3a469a202f1e468c67eaf7a7cd8226d0fd32f7b48084dca885d56047694762b67021713ca673929c163ec36e04e40ca8e1c6d17569419d3039d9a1ec866abe044a9ad635778b961fc0776dc832b3a451bd5d35072d2269cf9b040f6b7a7dad84fb114ed413b1426cb96ceaf83825665ed5a1d002c1687f92465b49ed4c7f0218ff8c6c7dd7221d589c65b3b9aaa71a41484b122846c7c7b57e02e679ea8469b70e14fe4f70fee4d87b910cf144be6fe48eef24da475c0b0bcc6565ae82cd3f4e3b24c76eaa5616c6111343306ab35c1fe5ca4a77c0e314ed7dba39d6f1e0de791719c241a939cc493bea2bae1c1e932679ea94d29084278513c77b899cc98059d06a27d171b0dbdf6bee13ddc4fc17a0c4d2827d488436b57baa167544138ca2e64a11b43ac8a06cd0c2fba2d4d900ed2d9205305e2d7383cc98dacb078133de5f6fb6bed2ef26ba92cea28aafc3b9948dd9ae5559e8bd6920b8cea462aa445ca6a95e0e7ba52961b181c79e73bd581821df2b10173727a810c92b83b5ba4a0403eb710d2ca10689a35bec6c3a708e9e92f7d78ff3c5d9989574b00c6736f84c199256e76e19e78f0c98a9d580b4a658c84fc8f2096c2fbea8f5f8c59d0fdacb3be2802ef802abbecb3aba4acaac69a0e965abd8981e9896b1f6ef9d60f7a164b371af869fd0e48073742825e9434fc54da837e120266d53302954843538ea7c6c3dbfb4ff3b2fdbe244437f2a153ccf7bdb4c92aa08102d4f3cff2ae5ef86fab4653595e6a5837fa2f3e29f27a9cde5966843fb847a4a61f1e76c281fe8bb2b0a181d096100db5a1a5ce7a910238251a43ca556712eaadea167fb4d7d75825e440f3ecd782036d7574df8bceacb397abefc5f5254d2722215c53ff54af8299aaaad642c6d72a14d27882d9bbd539e1cc7a527526ba89b8c037ad09120e98ab042d3e8652b31ae0e478516bfaf88efca9f3676ffe99d2819dcaeb7610a626695f53117665d267d3f7abebd6bbd6733f645c72c389f03855bdf1e4b8075b516569b118233a0f0971d24b83113c0b096f5216a207ca99a7cddc81c130923fe3d91e7508c9ac5f2e914ff5dccab9e558566fa14efb34ac98d878580814b94b73acbfde9072f30b881f7f0fff42d4045d1ace6322d86a97d164aa84d93a60498065cc7c20e636f5862dc81531a88c60305a2e59a985be327a6902e4bed986dbf4a0b50c217af0ea7fdf9ab37f9ea1a1aaa72f54cf40154ea9b269f1a7c09f9f43245109431a175d50e2db0132337baa0ef97eed0fcf20489da36b79a1172faccc2f7ded7c60e00694282d93359c4682135642bc81f433574aa8ef0c97b4ade7ca372c5ffc23c7eddd839bab4e0f14d6df15c9dbeab176bec8b5701cf054eb3072f6dadc98f88819042bf10c407516ee58bce33fbe3b3d86a54255e577db4598e30a135361528c101683a5fcde7e8ba53f3456254be8f45fe3a56120ae96ea3773631fcb3873aa3abd91bcff00bd38bd43697a2e789e00da6077482e7b1b1a677b5afae4c54e6cbdf7377b694eb7d7a5b913476a5be923322d3de06060fd5e819635232a2cf4f0731da13b8546d1d6d4f8d75b9fce6c2341a71b0ea6f780df54bfdb0dd5cd9855179f602f9172307c7268724c3618e6817abd793adc214a0dc0bc616816632f27ea336fb56dfd").unwrap());
2131 fn test_failure_packet_onion() {
2132 // Returning Errors test vectors from BOLT 4
2134 let onion_keys = build_test_onion_keys();
2135 let onion_error = ChannelManager::build_failure_packet(&onion_keys[4].shared_secret, 0x2002, &[0; 0]);
2136 assert_eq!(onion_error.encode(), hex::decode("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").unwrap());
2138 let onion_packet_1 = ChannelManager::encrypt_failure_packet(&onion_keys[4].shared_secret, &onion_error.encode()[..]);
2139 assert_eq!(onion_packet_1.data, hex::decode("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").unwrap());
2141 let onion_packet_2 = ChannelManager::encrypt_failure_packet(&onion_keys[3].shared_secret, &onion_packet_1.data[..]);
2142 assert_eq!(onion_packet_2.data, hex::decode("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").unwrap());
2144 let onion_packet_3 = ChannelManager::encrypt_failure_packet(&onion_keys[2].shared_secret, &onion_packet_2.data[..]);
2145 assert_eq!(onion_packet_3.data, hex::decode("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").unwrap());
2147 let onion_packet_4 = ChannelManager::encrypt_failure_packet(&onion_keys[1].shared_secret, &onion_packet_3.data[..]);
2148 assert_eq!(onion_packet_4.data, hex::decode("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").unwrap());
2150 let onion_packet_5 = ChannelManager::encrypt_failure_packet(&onion_keys[0].shared_secret, &onion_packet_4.data[..]);
2151 assert_eq!(onion_packet_5.data, hex::decode("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").unwrap());
2154 fn confirm_transaction(chain: &chaininterface::ChainWatchInterfaceUtil, tx: &Transaction, chan_id: u32) {
2155 assert!(chain.does_match_tx(tx));
2156 let mut header = BlockHeader { version: 0x20000000, prev_blockhash: Default::default(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
2157 chain.block_connected_checked(&header, 1, &[tx; 1], &[chan_id; 1]);
2159 header = BlockHeader { version: 0x20000000, prev_blockhash: header.bitcoin_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
2160 chain.block_connected_checked(&header, i, &[tx; 0], &[0; 0]);
2165 feeest: Arc<test_utils::TestFeeEstimator>,
2166 chain_monitor: Arc<chaininterface::ChainWatchInterfaceUtil>,
2167 tx_broadcaster: Arc<test_utils::TestBroadcaster>,
2168 chan_monitor: Arc<test_utils::TestChannelMonitor>,
2170 node: Arc<ChannelManager>,
2174 static mut CHAN_COUNT: u32 = 0;
2175 fn create_chan_between_nodes(node_a: &Node, node_b: &Node) -> (msgs::ChannelAnnouncement, msgs::ChannelUpdate, msgs::ChannelUpdate, [u8; 32], Transaction) {
2176 node_a.node.create_channel(node_b.node.get_our_node_id(), 100000, 42).unwrap();
2178 let events_1 = node_a.node.get_and_clear_pending_events();
2179 assert_eq!(events_1.len(), 1);
2180 let accept_chan = match events_1[0] {
2181 Event::SendOpenChannel { ref node_id, ref msg } => {
2182 assert_eq!(*node_id, node_b.node.get_our_node_id());
2183 node_b.node.handle_open_channel(&node_a.node.get_our_node_id(), msg).unwrap()
2185 _ => panic!("Unexpected event"),
2188 node_a.node.handle_accept_channel(&node_b.node.get_our_node_id(), &accept_chan).unwrap();
2190 let chan_id = unsafe { CHAN_COUNT };
2194 let events_2 = node_a.node.get_and_clear_pending_events();
2195 assert_eq!(events_2.len(), 1);
2197 Event::FundingGenerationReady { ref temporary_channel_id, ref channel_value_satoshis, ref output_script, user_channel_id } => {
2198 assert_eq!(*channel_value_satoshis, 100000);
2199 assert_eq!(user_channel_id, 42);
2201 tx = Transaction { version: chan_id as u32, lock_time: 0, input: Vec::new(), output: vec![TxOut {
2202 value: *channel_value_satoshis, script_pubkey: output_script.clone(),
2204 funding_output = OutPoint::new(Sha256dHash::from_data(&serialize(&tx).unwrap()[..]), 0);
2206 node_a.node.funding_transaction_generated(&temporary_channel_id, funding_output);
2207 let mut added_monitors = node_a.chan_monitor.added_monitors.lock().unwrap();
2208 assert_eq!(added_monitors.len(), 1);
2209 assert_eq!(added_monitors[0].0, funding_output);
2210 added_monitors.clear();
2212 _ => panic!("Unexpected event"),
2215 let events_3 = node_a.node.get_and_clear_pending_events();
2216 assert_eq!(events_3.len(), 1);
2217 let funding_signed = match events_3[0] {
2218 Event::SendFundingCreated { ref node_id, ref msg } => {
2219 assert_eq!(*node_id, node_b.node.get_our_node_id());
2220 let res = node_b.node.handle_funding_created(&node_a.node.get_our_node_id(), msg).unwrap();
2221 let mut added_monitors = node_b.chan_monitor.added_monitors.lock().unwrap();
2222 assert_eq!(added_monitors.len(), 1);
2223 assert_eq!(added_monitors[0].0, funding_output);
2224 added_monitors.clear();
2227 _ => panic!("Unexpected event"),
2230 node_a.node.handle_funding_signed(&node_b.node.get_our_node_id(), &funding_signed).unwrap();
2232 let mut added_monitors = node_a.chan_monitor.added_monitors.lock().unwrap();
2233 assert_eq!(added_monitors.len(), 1);
2234 assert_eq!(added_monitors[0].0, funding_output);
2235 added_monitors.clear();
2238 let events_4 = node_a.node.get_and_clear_pending_events();
2239 assert_eq!(events_4.len(), 1);
2241 Event::FundingBroadcastSafe { ref funding_txo, user_channel_id } => {
2242 assert_eq!(user_channel_id, 42);
2243 assert_eq!(*funding_txo, funding_output);
2245 _ => panic!("Unexpected event"),
2248 confirm_transaction(&node_a.chain_monitor, &tx, chan_id);
2249 let events_5 = node_a.node.get_and_clear_pending_events();
2250 assert_eq!(events_5.len(), 1);
2252 Event::SendFundingLocked { ref node_id, ref msg, ref announcement_sigs } => {
2253 assert_eq!(*node_id, node_b.node.get_our_node_id());
2254 assert!(announcement_sigs.is_none());
2255 node_b.node.handle_funding_locked(&node_a.node.get_our_node_id(), msg).unwrap()
2257 _ => panic!("Unexpected event"),
2262 confirm_transaction(&node_b.chain_monitor, &tx, chan_id);
2263 let events_6 = node_b.node.get_and_clear_pending_events();
2264 assert_eq!(events_6.len(), 1);
2265 let as_announcement_sigs = match events_6[0] {
2266 Event::SendFundingLocked { ref node_id, ref msg, ref announcement_sigs } => {
2267 assert_eq!(*node_id, node_a.node.get_our_node_id());
2268 channel_id = msg.channel_id.clone();
2269 let as_announcement_sigs = node_a.node.handle_funding_locked(&node_b.node.get_our_node_id(), msg).unwrap().unwrap();
2270 node_a.node.handle_announcement_signatures(&node_b.node.get_our_node_id(), &(*announcement_sigs).clone().unwrap()).unwrap();
2271 as_announcement_sigs
2273 _ => panic!("Unexpected event"),
2276 let events_7 = node_a.node.get_and_clear_pending_events();
2277 assert_eq!(events_7.len(), 1);
2278 let (announcement, as_update) = match events_7[0] {
2279 Event::BroadcastChannelAnnouncement { ref msg, ref update_msg } => {
2282 _ => panic!("Unexpected event"),
2285 node_b.node.handle_announcement_signatures(&node_a.node.get_our_node_id(), &as_announcement_sigs).unwrap();
2286 let events_8 = node_b.node.get_and_clear_pending_events();
2287 assert_eq!(events_8.len(), 1);
2288 let bs_update = match events_8[0] {
2289 Event::BroadcastChannelAnnouncement { ref msg, ref update_msg } => {
2290 assert!(*announcement == *msg);
2293 _ => panic!("Unexpected event"),
2300 ((*announcement).clone(), (*as_update).clone(), (*bs_update).clone(), channel_id, tx)
2303 fn create_announced_chan_between_nodes(nodes: &Vec<Node>, a: usize, b: usize) -> (msgs::ChannelUpdate, msgs::ChannelUpdate, [u8; 32], Transaction) {
2304 let chan_announcement = create_chan_between_nodes(&nodes[a], &nodes[b]);
2306 assert!(node.router.handle_channel_announcement(&chan_announcement.0).unwrap());
2307 node.router.handle_channel_update(&chan_announcement.1).unwrap();
2308 node.router.handle_channel_update(&chan_announcement.2).unwrap();
2310 (chan_announcement.1, chan_announcement.2, chan_announcement.3, chan_announcement.4)
2313 fn close_channel(outbound_node: &Node, inbound_node: &Node, channel_id: &[u8; 32], funding_tx: Transaction, close_inbound_first: bool) -> (msgs::ChannelUpdate, msgs::ChannelUpdate) {
2314 let (node_a, broadcaster_a) = if close_inbound_first { (&inbound_node.node, &inbound_node.tx_broadcaster) } else { (&outbound_node.node, &outbound_node.tx_broadcaster) };
2315 let (node_b, broadcaster_b) = if close_inbound_first { (&outbound_node.node, &outbound_node.tx_broadcaster) } else { (&inbound_node.node, &inbound_node.tx_broadcaster) };
2318 node_a.close_channel(channel_id).unwrap();
2319 let events_1 = node_a.get_and_clear_pending_events();
2320 assert_eq!(events_1.len(), 1);
2321 let shutdown_a = match events_1[0] {
2322 Event::SendShutdown { ref node_id, ref msg } => {
2323 assert_eq!(node_id, &node_b.get_our_node_id());
2326 _ => panic!("Unexpected event"),
2329 let (shutdown_b, mut closing_signed_b) = node_b.handle_shutdown(&node_a.get_our_node_id(), &shutdown_a).unwrap();
2330 if !close_inbound_first {
2331 assert!(closing_signed_b.is_none());
2333 let (empty_a, mut closing_signed_a) = node_a.handle_shutdown(&node_b.get_our_node_id(), &shutdown_b.unwrap()).unwrap();
2334 assert!(empty_a.is_none());
2335 if close_inbound_first {
2336 assert!(closing_signed_a.is_none());
2337 closing_signed_a = node_a.handle_closing_signed(&node_b.get_our_node_id(), &closing_signed_b.unwrap()).unwrap();
2338 assert_eq!(broadcaster_a.txn_broadcasted.lock().unwrap().len(), 1);
2339 tx_a = broadcaster_a.txn_broadcasted.lock().unwrap().remove(0);
2341 let empty_b = node_b.handle_closing_signed(&node_a.get_our_node_id(), &closing_signed_a.unwrap()).unwrap();
2342 assert!(empty_b.is_none());
2343 assert_eq!(broadcaster_b.txn_broadcasted.lock().unwrap().len(), 1);
2344 tx_b = broadcaster_b.txn_broadcasted.lock().unwrap().remove(0);
2346 closing_signed_b = node_b.handle_closing_signed(&node_a.get_our_node_id(), &closing_signed_a.unwrap()).unwrap();
2347 assert_eq!(broadcaster_b.txn_broadcasted.lock().unwrap().len(), 1);
2348 tx_b = broadcaster_b.txn_broadcasted.lock().unwrap().remove(0);
2350 let empty_a2 = node_a.handle_closing_signed(&node_b.get_our_node_id(), &closing_signed_b.unwrap()).unwrap();
2351 assert!(empty_a2.is_none());
2352 assert_eq!(broadcaster_a.txn_broadcasted.lock().unwrap().len(), 1);
2353 tx_a = broadcaster_a.txn_broadcasted.lock().unwrap().remove(0);
2355 assert_eq!(tx_a, tx_b);
2356 let mut funding_tx_map = HashMap::new();
2357 funding_tx_map.insert(funding_tx.txid(), funding_tx);
2358 tx_a.verify(&funding_tx_map).unwrap();
2360 let events_2 = node_a.get_and_clear_pending_events();
2361 assert_eq!(events_2.len(), 1);
2362 let as_update = match events_2[0] {
2363 Event::BroadcastChannelUpdate { ref msg } => {
2366 _ => panic!("Unexpected event"),
2369 let events_3 = node_b.get_and_clear_pending_events();
2370 assert_eq!(events_3.len(), 1);
2371 let bs_update = match events_3[0] {
2372 Event::BroadcastChannelUpdate { ref msg } => {
2375 _ => panic!("Unexpected event"),
2378 (as_update, bs_update)
2383 msgs: Vec<msgs::UpdateAddHTLC>,
2384 commitment_msg: msgs::CommitmentSigned,
2387 fn from_event(event: Event) -> SendEvent {
2389 Event::SendHTLCs { node_id, msgs, commitment_msg } => {
2390 SendEvent { node_id: node_id, msgs: msgs, commitment_msg: commitment_msg }
2392 _ => panic!("Unexpected event type!"),
2397 static mut PAYMENT_COUNT: u8 = 0;
2398 fn send_along_route(origin_node: &Node, route: Route, expected_route: &[&Node], recv_value: u64) -> ([u8; 32], [u8; 32]) {
2399 let our_payment_preimage = unsafe { [PAYMENT_COUNT; 32] };
2400 unsafe { PAYMENT_COUNT += 1 };
2401 let our_payment_hash = {
2402 let mut sha = Sha256::new();
2403 sha.input(&our_payment_preimage[..]);
2404 let mut ret = [0; 32];
2405 sha.result(&mut ret);
2409 let mut payment_event = {
2410 origin_node.node.send_payment(route, our_payment_hash).unwrap();
2412 let mut added_monitors = origin_node.chan_monitor.added_monitors.lock().unwrap();
2413 assert_eq!(added_monitors.len(), 1);
2414 added_monitors.clear();
2417 let mut events = origin_node.node.get_and_clear_pending_events();
2418 assert_eq!(events.len(), 1);
2419 SendEvent::from_event(events.remove(0))
2421 let mut prev_node = origin_node;
2423 for (idx, &node) in expected_route.iter().enumerate() {
2424 assert_eq!(node.node.get_our_node_id(), payment_event.node_id);
2426 node.node.handle_update_add_htlc(&prev_node.node.get_our_node_id(), &payment_event.msgs[0]).unwrap();
2428 let added_monitors = node.chan_monitor.added_monitors.lock().unwrap();
2429 assert_eq!(added_monitors.len(), 0);
2432 let revoke_and_ack = node.node.handle_commitment_signed(&prev_node.node.get_our_node_id(), &payment_event.commitment_msg).unwrap();
2434 let mut added_monitors = node.chan_monitor.added_monitors.lock().unwrap();
2435 assert_eq!(added_monitors.len(), 1);
2436 added_monitors.clear();
2438 assert!(prev_node.node.handle_revoke_and_ack(&node.node.get_our_node_id(), &revoke_and_ack.0).unwrap().is_none());
2439 let prev_revoke_and_ack = prev_node.node.handle_commitment_signed(&node.node.get_our_node_id(), &revoke_and_ack.1.unwrap()).unwrap();
2441 let mut added_monitors = prev_node.chan_monitor.added_monitors.lock().unwrap();
2442 assert_eq!(added_monitors.len(), 2);
2443 added_monitors.clear();
2445 assert!(node.node.handle_revoke_and_ack(&prev_node.node.get_our_node_id(), &prev_revoke_and_ack.0).unwrap().is_none());
2446 assert!(prev_revoke_and_ack.1.is_none());
2448 let mut added_monitors = node.chan_monitor.added_monitors.lock().unwrap();
2449 assert_eq!(added_monitors.len(), 1);
2450 added_monitors.clear();
2453 let events_1 = node.node.get_and_clear_pending_events();
2454 assert_eq!(events_1.len(), 1);
2456 Event::PendingHTLCsForwardable { .. } => { },
2457 _ => panic!("Unexpected event"),
2460 node.node.channel_state.lock().unwrap().next_forward = Instant::now();
2461 node.node.process_pending_htlc_forwards();
2463 let mut events_2 = node.node.get_and_clear_pending_events();
2464 assert_eq!(events_2.len(), 1);
2465 if idx == expected_route.len() - 1 {
2467 Event::PaymentReceived { ref payment_hash, amt } => {
2468 assert_eq!(our_payment_hash, *payment_hash);
2469 assert_eq!(amt, recv_value);
2471 _ => panic!("Unexpected event"),
2475 let mut added_monitors = node.chan_monitor.added_monitors.lock().unwrap();
2476 assert_eq!(added_monitors.len(), 1);
2477 added_monitors.clear();
2479 payment_event = SendEvent::from_event(events_2.remove(0));
2480 assert_eq!(payment_event.msgs.len(), 1);
2486 (our_payment_preimage, our_payment_hash)
2489 fn claim_payment(origin_node: &Node, expected_route: &[&Node], our_payment_preimage: [u8; 32]) {
2490 assert!(expected_route.last().unwrap().node.claim_funds(our_payment_preimage));
2492 let mut added_monitors = expected_route.last().unwrap().chan_monitor.added_monitors.lock().unwrap();
2493 assert_eq!(added_monitors.len(), 1);
2494 added_monitors.clear();
2497 let mut next_msgs: Option<(msgs::UpdateFulfillHTLC, msgs::CommitmentSigned)> = None;
2498 macro_rules! update_fulfill_dance {
2499 ($node: expr, $prev_node: expr, $last_node: expr) => {
2501 $node.node.handle_update_fulfill_htlc(&$prev_node.node.get_our_node_id(), &next_msgs.as_ref().unwrap().0).unwrap();
2503 let mut added_monitors = $node.chan_monitor.added_monitors.lock().unwrap();
2505 assert_eq!(added_monitors.len(), 0);
2507 assert_eq!(added_monitors.len(), 1);
2509 added_monitors.clear();
2511 let revoke_and_commit = $node.node.handle_commitment_signed(&$prev_node.node.get_our_node_id(), &next_msgs.as_ref().unwrap().1).unwrap();
2513 let mut added_monitors = $node.chan_monitor.added_monitors.lock().unwrap();
2514 assert_eq!(added_monitors.len(), 1);
2515 added_monitors.clear();
2517 assert!($prev_node.node.handle_revoke_and_ack(&$node.node.get_our_node_id(), &revoke_and_commit.0).unwrap().is_none());
2518 let revoke_and_ack = $prev_node.node.handle_commitment_signed(&$node.node.get_our_node_id(), &revoke_and_commit.1.unwrap()).unwrap();
2519 assert!(revoke_and_ack.1.is_none());
2521 let mut added_monitors = $prev_node.chan_monitor.added_monitors.lock().unwrap();
2522 assert_eq!(added_monitors.len(), 2);
2523 added_monitors.clear();
2525 assert!($node.node.handle_revoke_and_ack(&$prev_node.node.get_our_node_id(), &revoke_and_ack.0).unwrap().is_none());
2527 let mut added_monitors = $node.chan_monitor.added_monitors.lock().unwrap();
2528 assert_eq!(added_monitors.len(), 1);
2529 added_monitors.clear();
2535 let mut expected_next_node = expected_route.last().unwrap().node.get_our_node_id();
2536 let mut prev_node = expected_route.last().unwrap();
2537 for node in expected_route.iter().rev() {
2538 assert_eq!(expected_next_node, node.node.get_our_node_id());
2539 if next_msgs.is_some() {
2540 update_fulfill_dance!(node, prev_node, false);
2543 let events = node.node.get_and_clear_pending_events();
2544 assert_eq!(events.len(), 1);
2546 Event::SendFulfillHTLC { ref node_id, ref msg, ref commitment_msg } => {
2547 expected_next_node = node_id.clone();
2548 next_msgs = Some((msg.clone(), commitment_msg.clone()));
2550 _ => panic!("Unexpected event"),
2556 assert_eq!(expected_next_node, origin_node.node.get_our_node_id());
2557 update_fulfill_dance!(origin_node, expected_route.first().unwrap(), true);
2559 let events = origin_node.node.get_and_clear_pending_events();
2560 assert_eq!(events.len(), 1);
2562 Event::PaymentSent { payment_preimage } => {
2563 assert_eq!(payment_preimage, our_payment_preimage);
2565 _ => panic!("Unexpected event"),
2569 const TEST_FINAL_CLTV: u32 = 32;
2571 fn route_payment(origin_node: &Node, expected_route: &[&Node], recv_value: u64) -> ([u8; 32], [u8; 32]) {
2572 let route = origin_node.router.get_route(&expected_route.last().unwrap().node.get_our_node_id(), None, &Vec::new(), recv_value, TEST_FINAL_CLTV).unwrap();
2573 assert_eq!(route.hops.len(), expected_route.len());
2574 for (node, hop) in expected_route.iter().zip(route.hops.iter()) {
2575 assert_eq!(hop.pubkey, node.node.get_our_node_id());
2578 send_along_route(origin_node, route, expected_route, recv_value)
2581 fn route_over_limit(origin_node: &Node, expected_route: &[&Node], recv_value: u64) {
2582 let route = origin_node.router.get_route(&expected_route.last().unwrap().node.get_our_node_id(), None, &Vec::new(), recv_value, TEST_FINAL_CLTV).unwrap();
2583 assert_eq!(route.hops.len(), expected_route.len());
2584 for (node, hop) in expected_route.iter().zip(route.hops.iter()) {
2585 assert_eq!(hop.pubkey, node.node.get_our_node_id());
2588 let our_payment_preimage = unsafe { [PAYMENT_COUNT; 32] };
2589 unsafe { PAYMENT_COUNT += 1 };
2590 let our_payment_hash = {
2591 let mut sha = Sha256::new();
2592 sha.input(&our_payment_preimage[..]);
2593 let mut ret = [0; 32];
2594 sha.result(&mut ret);
2598 let err = origin_node.node.send_payment(route, our_payment_hash).err().unwrap();
2599 assert_eq!(err.err, "Cannot send value that would put us over our max HTLC value in flight");
2602 fn send_payment(origin: &Node, expected_route: &[&Node], recv_value: u64) {
2603 let our_payment_preimage = route_payment(&origin, expected_route, recv_value).0;
2604 claim_payment(&origin, expected_route, our_payment_preimage);
2607 fn fail_payment(origin_node: &Node, expected_route: &[&Node], our_payment_hash: [u8; 32]) {
2608 assert!(expected_route.last().unwrap().node.fail_htlc_backwards(&our_payment_hash));
2610 let mut added_monitors = expected_route.last().unwrap().chan_monitor.added_monitors.lock().unwrap();
2611 assert_eq!(added_monitors.len(), 1);
2612 added_monitors.clear();
2615 let mut next_msgs: Option<(msgs::UpdateFailHTLC, msgs::CommitmentSigned)> = None;
2616 macro_rules! update_fail_dance {
2617 ($node: expr, $prev_node: expr, $last_node: expr) => {
2619 $node.node.handle_update_fail_htlc(&$prev_node.node.get_our_node_id(), &next_msgs.as_ref().unwrap().0).unwrap();
2620 let revoke_and_commit = $node.node.handle_commitment_signed(&$prev_node.node.get_our_node_id(), &next_msgs.as_ref().unwrap().1).unwrap();
2623 let mut added_monitors = $node.chan_monitor.added_monitors.lock().unwrap();
2624 assert_eq!(added_monitors.len(), 1);
2625 added_monitors.clear();
2627 assert!($prev_node.node.handle_revoke_and_ack(&$node.node.get_our_node_id(), &revoke_and_commit.0).unwrap().is_none());
2629 let mut added_monitors = $prev_node.chan_monitor.added_monitors.lock().unwrap();
2630 assert_eq!(added_monitors.len(), 1);
2631 added_monitors.clear();
2633 let revoke_and_ack = $prev_node.node.handle_commitment_signed(&$node.node.get_our_node_id(), &revoke_and_commit.1.unwrap()).unwrap();
2635 let mut added_monitors = $prev_node.chan_monitor.added_monitors.lock().unwrap();
2636 assert_eq!(added_monitors.len(), 1);
2637 added_monitors.clear();
2639 assert!(revoke_and_ack.1.is_none());
2640 assert!($node.node.get_and_clear_pending_events().is_empty());
2641 assert!($node.node.handle_revoke_and_ack(&$prev_node.node.get_our_node_id(), &revoke_and_ack.0).unwrap().is_none());
2643 let mut added_monitors = $node.chan_monitor.added_monitors.lock().unwrap();
2645 assert_eq!(added_monitors.len(), 1);
2647 assert_eq!(added_monitors.len(), 2);
2648 assert!(added_monitors[0].0 != added_monitors[1].0);
2650 added_monitors.clear();
2656 let mut expected_next_node = expected_route.last().unwrap().node.get_our_node_id();
2657 let mut prev_node = expected_route.last().unwrap();
2658 for node in expected_route.iter().rev() {
2659 assert_eq!(expected_next_node, node.node.get_our_node_id());
2660 if next_msgs.is_some() {
2661 update_fail_dance!(node, prev_node, false);
2664 let events = node.node.get_and_clear_pending_events();
2665 assert_eq!(events.len(), 1);
2667 Event::SendFailHTLC { ref node_id, ref msg, ref commitment_msg } => {
2668 expected_next_node = node_id.clone();
2669 next_msgs = Some((msg.clone(), commitment_msg.clone()));
2671 _ => panic!("Unexpected event"),
2677 assert_eq!(expected_next_node, origin_node.node.get_our_node_id());
2678 update_fail_dance!(origin_node, expected_route.first().unwrap(), true);
2680 let events = origin_node.node.get_and_clear_pending_events();
2681 assert_eq!(events.len(), 1);
2683 Event::PaymentFailed { payment_hash } => {
2684 assert_eq!(payment_hash, our_payment_hash);
2686 _ => panic!("Unexpected event"),
2690 fn create_network(node_count: usize) -> Vec<Node> {
2691 let mut nodes = Vec::new();
2692 let mut rng = thread_rng();
2693 let secp_ctx = Secp256k1::new();
2694 let logger: Arc<Logger> = Arc::new(test_utils::TestLogger::new());
2696 for _ in 0..node_count {
2697 let feeest = Arc::new(test_utils::TestFeeEstimator { sat_per_kw: 253 });
2698 let chain_monitor = Arc::new(chaininterface::ChainWatchInterfaceUtil::new(Arc::clone(&logger)));
2699 let tx_broadcaster = Arc::new(test_utils::TestBroadcaster{txn_broadcasted: Mutex::new(Vec::new())});
2700 let chan_monitor = Arc::new(test_utils::TestChannelMonitor::new(chain_monitor.clone(), tx_broadcaster.clone()));
2702 let mut key_slice = [0; 32];
2703 rng.fill_bytes(&mut key_slice);
2704 SecretKey::from_slice(&secp_ctx, &key_slice).unwrap()
2706 let node = ChannelManager::new(node_id.clone(), 0, true, Network::Testnet, feeest.clone(), chan_monitor.clone(), chain_monitor.clone(), tx_broadcaster.clone(), Arc::clone(&logger)).unwrap();
2707 let router = Router::new(PublicKey::from_secret_key(&secp_ctx, &node_id).unwrap(), Arc::clone(&logger));
2708 nodes.push(Node { feeest, chain_monitor, tx_broadcaster, chan_monitor, node_id, node, router });
2715 fn fake_network_test() {
2716 // Simple test which builds a network of ChannelManagers, connects them to each other, and
2717 // tests that payments get routed and transactions broadcast in semi-reasonable ways.
2718 let nodes = create_network(4);
2720 // Create some initial channels
2721 let chan_1 = create_announced_chan_between_nodes(&nodes, 0, 1);
2722 let chan_2 = create_announced_chan_between_nodes(&nodes, 1, 2);
2723 let chan_3 = create_announced_chan_between_nodes(&nodes, 2, 3);
2725 // Rebalance the network a bit by relaying one payment through all the channels...
2726 send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3])[..], 8000000);
2727 send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3])[..], 8000000);
2728 send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3])[..], 8000000);
2729 send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3])[..], 8000000);
2731 // Send some more payments
2732 send_payment(&nodes[1], &vec!(&nodes[2], &nodes[3])[..], 1000000);
2733 send_payment(&nodes[3], &vec!(&nodes[2], &nodes[1], &nodes[0])[..], 1000000);
2734 send_payment(&nodes[3], &vec!(&nodes[2], &nodes[1])[..], 1000000);
2736 // Test failure packets
2737 let payment_hash_1 = route_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3])[..], 1000000).1;
2738 fail_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3])[..], payment_hash_1);
2740 // Add a new channel that skips 3
2741 let chan_4 = create_announced_chan_between_nodes(&nodes, 1, 3);
2743 send_payment(&nodes[0], &vec!(&nodes[1], &nodes[3])[..], 1000000);
2744 send_payment(&nodes[2], &vec!(&nodes[3])[..], 1000000);
2745 send_payment(&nodes[1], &vec!(&nodes[3])[..], 8000000);
2746 send_payment(&nodes[1], &vec!(&nodes[3])[..], 8000000);
2747 send_payment(&nodes[1], &vec!(&nodes[3])[..], 8000000);
2748 send_payment(&nodes[1], &vec!(&nodes[3])[..], 8000000);
2749 send_payment(&nodes[1], &vec!(&nodes[3])[..], 8000000);
2751 // Do some rebalance loop payments, simultaneously
2752 let mut hops = Vec::with_capacity(3);
2753 hops.push(RouteHop {
2754 pubkey: nodes[2].node.get_our_node_id(),
2755 short_channel_id: chan_2.0.contents.short_channel_id,
2757 cltv_expiry_delta: chan_3.0.contents.cltv_expiry_delta as u32
2759 hops.push(RouteHop {
2760 pubkey: nodes[3].node.get_our_node_id(),
2761 short_channel_id: chan_3.0.contents.short_channel_id,
2763 cltv_expiry_delta: chan_4.1.contents.cltv_expiry_delta as u32
2765 hops.push(RouteHop {
2766 pubkey: nodes[1].node.get_our_node_id(),
2767 short_channel_id: chan_4.0.contents.short_channel_id,
2769 cltv_expiry_delta: TEST_FINAL_CLTV,
2771 hops[1].fee_msat = chan_4.1.contents.fee_base_msat as u64 + chan_4.1.contents.fee_proportional_millionths as u64 * hops[2].fee_msat as u64 / 1000000;
2772 hops[0].fee_msat = chan_3.0.contents.fee_base_msat as u64 + chan_3.0.contents.fee_proportional_millionths as u64 * hops[1].fee_msat as u64 / 1000000;
2773 let payment_preimage_1 = send_along_route(&nodes[1], Route { hops }, &vec!(&nodes[2], &nodes[3], &nodes[1])[..], 1000000).0;
2775 let mut hops = Vec::with_capacity(3);
2776 hops.push(RouteHop {
2777 pubkey: nodes[3].node.get_our_node_id(),
2778 short_channel_id: chan_4.0.contents.short_channel_id,
2780 cltv_expiry_delta: chan_3.1.contents.cltv_expiry_delta as u32
2782 hops.push(RouteHop {
2783 pubkey: nodes[2].node.get_our_node_id(),
2784 short_channel_id: chan_3.0.contents.short_channel_id,
2786 cltv_expiry_delta: chan_2.1.contents.cltv_expiry_delta as u32
2788 hops.push(RouteHop {
2789 pubkey: nodes[1].node.get_our_node_id(),
2790 short_channel_id: chan_2.0.contents.short_channel_id,
2792 cltv_expiry_delta: TEST_FINAL_CLTV,
2794 hops[1].fee_msat = chan_2.1.contents.fee_base_msat as u64 + chan_2.1.contents.fee_proportional_millionths as u64 * hops[2].fee_msat as u64 / 1000000;
2795 hops[0].fee_msat = chan_3.1.contents.fee_base_msat as u64 + chan_3.1.contents.fee_proportional_millionths as u64 * hops[1].fee_msat as u64 / 1000000;
2796 let payment_hash_2 = send_along_route(&nodes[1], Route { hops }, &vec!(&nodes[3], &nodes[2], &nodes[1])[..], 1000000).1;
2798 // Claim the rebalances...
2799 fail_payment(&nodes[1], &vec!(&nodes[3], &nodes[2], &nodes[1])[..], payment_hash_2);
2800 claim_payment(&nodes[1], &vec!(&nodes[2], &nodes[3], &nodes[1])[..], payment_preimage_1);
2802 // Add a duplicate new channel from 2 to 4
2803 let chan_5 = create_announced_chan_between_nodes(&nodes, 1, 3);
2805 // Send some payments across both channels
2806 let payment_preimage_3 = route_payment(&nodes[0], &vec!(&nodes[1], &nodes[3])[..], 3000000).0;
2807 let payment_preimage_4 = route_payment(&nodes[0], &vec!(&nodes[1], &nodes[3])[..], 3000000).0;
2808 let payment_preimage_5 = route_payment(&nodes[0], &vec!(&nodes[1], &nodes[3])[..], 3000000).0;
2810 route_over_limit(&nodes[0], &vec!(&nodes[1], &nodes[3])[..], 3000000);
2812 //TODO: Test that routes work again here as we've been notified that the channel is full
2814 claim_payment(&nodes[0], &vec!(&nodes[1], &nodes[3])[..], payment_preimage_3);
2815 claim_payment(&nodes[0], &vec!(&nodes[1], &nodes[3])[..], payment_preimage_4);
2816 claim_payment(&nodes[0], &vec!(&nodes[1], &nodes[3])[..], payment_preimage_5);
2818 // Close down the channels...
2819 close_channel(&nodes[0], &nodes[1], &chan_1.2, chan_1.3, true);
2820 close_channel(&nodes[1], &nodes[2], &chan_2.2, chan_2.3, false);
2821 close_channel(&nodes[2], &nodes[3], &chan_3.2, chan_3.3, true);
2822 close_channel(&nodes[1], &nodes[3], &chan_4.2, chan_4.3, false);
2823 close_channel(&nodes[1], &nodes[3], &chan_5.2, chan_5.3, false);
2825 // Check that we processed all pending events
2827 assert_eq!(node.node.get_and_clear_pending_events().len(), 0);
2828 assert_eq!(node.chan_monitor.added_monitors.lock().unwrap().len(), 0);
2832 #[derive(PartialEq)]
2833 enum HTLCType { NONE, TIMEOUT, SUCCESS }
2834 fn test_txn_broadcast(node: &Node, chan: &(msgs::ChannelUpdate, msgs::ChannelUpdate, [u8; 32], Transaction), commitment_tx: Option<Transaction>, has_htlc_tx: HTLCType) -> Vec<Transaction> {
2835 let mut node_txn = node.tx_broadcaster.txn_broadcasted.lock().unwrap();
2836 assert!(node_txn.len() >= if commitment_tx.is_some() { 0 } else { 1 } + if has_htlc_tx == HTLCType::NONE { 0 } else { 1 });
2838 let mut res = Vec::with_capacity(2);
2840 if let Some(explicit_tx) = commitment_tx {
2841 res.push(explicit_tx.clone());
2843 for tx in node_txn.iter() {
2844 if tx.input.len() == 1 && tx.input[0].prev_hash == chan.3.txid() {
2845 let mut funding_tx_map = HashMap::new();
2846 funding_tx_map.insert(chan.3.txid(), chan.3.clone());
2847 tx.verify(&funding_tx_map).unwrap();
2848 res.push(tx.clone());
2852 assert_eq!(res.len(), 1);
2854 if has_htlc_tx != HTLCType::NONE {
2855 for tx in node_txn.iter() {
2856 if tx.input.len() == 1 && tx.input[0].prev_hash == res[0].txid() {
2857 let mut funding_tx_map = HashMap::new();
2858 funding_tx_map.insert(res[0].txid(), res[0].clone());
2859 tx.verify(&funding_tx_map).unwrap();
2860 if has_htlc_tx == HTLCType::TIMEOUT {
2861 assert!(tx.lock_time != 0);
2863 assert!(tx.lock_time == 0);
2865 res.push(tx.clone());
2869 assert_eq!(res.len(), 2);
2875 fn check_preimage_claim(node: &Node, prev_txn: &Vec<Transaction>) -> Vec<Transaction> {
2876 let mut node_txn = node.tx_broadcaster.txn_broadcasted.lock().unwrap();
2878 assert!(node_txn.len() >= 1);
2879 assert_eq!(node_txn[0].input.len(), 1);
2880 let mut found_prev = false;
2882 for tx in prev_txn {
2883 if node_txn[0].input[0].prev_hash == tx.txid() {
2884 let mut funding_tx_map = HashMap::new();
2885 funding_tx_map.insert(tx.txid(), tx.clone());
2886 node_txn[0].verify(&funding_tx_map).unwrap();
2888 assert!(node_txn[0].input[0].witness[2].len() > 106); // must spend an htlc output
2889 assert_eq!(tx.input.len(), 1); // must spend a commitment tx
2895 assert!(found_prev);
2897 let mut res = Vec::new();
2898 mem::swap(&mut *node_txn, &mut res);
2902 fn get_announce_close_broadcast_events(nodes: &Vec<Node>, a: usize, b: usize) {
2903 let events_1 = nodes[a].node.get_and_clear_pending_events();
2904 assert_eq!(events_1.len(), 1);
2905 let as_update = match events_1[0] {
2906 Event::BroadcastChannelUpdate { ref msg } => {
2909 _ => panic!("Unexpected event"),
2912 let events_2 = nodes[b].node.get_and_clear_pending_events();
2913 assert_eq!(events_2.len(), 1);
2914 let bs_update = match events_2[0] {
2915 Event::BroadcastChannelUpdate { ref msg } => {
2918 _ => panic!("Unexpected event"),
2922 node.router.handle_channel_update(&as_update).unwrap();
2923 node.router.handle_channel_update(&bs_update).unwrap();
2928 fn channel_monitor_network_test() {
2929 // Simple test which builds a network of ChannelManagers, connects them to each other, and
2930 // tests that ChannelMonitor is able to recover from various states.
2931 let nodes = create_network(5);
2933 // Create some initial channels
2934 let chan_1 = create_announced_chan_between_nodes(&nodes, 0, 1);
2935 let chan_2 = create_announced_chan_between_nodes(&nodes, 1, 2);
2936 let chan_3 = create_announced_chan_between_nodes(&nodes, 2, 3);
2937 let chan_4 = create_announced_chan_between_nodes(&nodes, 3, 4);
2939 // Rebalance the network a bit by relaying one payment through all the channels...
2940 send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3], &nodes[4])[..], 8000000);
2941 send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3], &nodes[4])[..], 8000000);
2942 send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3], &nodes[4])[..], 8000000);
2943 send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3], &nodes[4])[..], 8000000);
2945 // Simple case with no pending HTLCs:
2946 nodes[1].node.peer_disconnected(&nodes[0].node.get_our_node_id(), true);
2948 let mut node_txn = test_txn_broadcast(&nodes[1], &chan_1, None, HTLCType::NONE);
2949 let header = BlockHeader { version: 0x20000000, prev_blockhash: Default::default(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
2950 nodes[0].chain_monitor.block_connected_with_filtering(&Block { header, txdata: vec![node_txn.drain(..).next().unwrap()] }, 1);
2951 test_txn_broadcast(&nodes[0], &chan_1, None, HTLCType::NONE);
2953 get_announce_close_broadcast_events(&nodes, 0, 1);
2954 assert_eq!(nodes[0].node.list_channels().len(), 0);
2955 assert_eq!(nodes[1].node.list_channels().len(), 1);
2957 // One pending HTLC is discarded by the force-close:
2958 let payment_preimage_1 = route_payment(&nodes[1], &vec!(&nodes[2], &nodes[3])[..], 3000000).0;
2960 // Simple case of one pending HTLC to HTLC-Timeout
2961 nodes[1].node.peer_disconnected(&nodes[2].node.get_our_node_id(), true);
2963 let mut node_txn = test_txn_broadcast(&nodes[1], &chan_2, None, HTLCType::TIMEOUT);
2964 let header = BlockHeader { version: 0x20000000, prev_blockhash: Default::default(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
2965 nodes[2].chain_monitor.block_connected_with_filtering(&Block { header, txdata: vec![node_txn.drain(..).next().unwrap()] }, 1);
2966 test_txn_broadcast(&nodes[2], &chan_2, None, HTLCType::NONE);
2968 get_announce_close_broadcast_events(&nodes, 1, 2);
2969 assert_eq!(nodes[1].node.list_channels().len(), 0);
2970 assert_eq!(nodes[2].node.list_channels().len(), 1);
2972 macro_rules! claim_funds {
2973 ($node: expr, $prev_node: expr, $preimage: expr) => {
2975 assert!($node.node.claim_funds($preimage));
2977 let mut added_monitors = $node.chan_monitor.added_monitors.lock().unwrap();
2978 assert_eq!(added_monitors.len(), 1);
2979 added_monitors.clear();
2982 let events = $node.node.get_and_clear_pending_events();
2983 assert_eq!(events.len(), 1);
2985 Event::SendFulfillHTLC { ref node_id, .. } => {
2986 assert_eq!(*node_id, $prev_node.node.get_our_node_id());
2988 _ => panic!("Unexpected event"),
2994 // nodes[3] gets the preimage, but nodes[2] already disconnected, resulting in a nodes[2]
2995 // HTLC-Timeout and a nodes[3] claim against it (+ its own announces)
2996 nodes[2].node.peer_disconnected(&nodes[3].node.get_our_node_id(), true);
2998 let node_txn = test_txn_broadcast(&nodes[2], &chan_3, None, HTLCType::TIMEOUT);
3000 // Claim the payment on nodes[3], giving it knowledge of the preimage
3001 claim_funds!(nodes[3], nodes[2], payment_preimage_1);
3003 let header = BlockHeader { version: 0x20000000, prev_blockhash: Default::default(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
3004 nodes[3].chain_monitor.block_connected_with_filtering(&Block { header, txdata: vec![node_txn[0].clone()] }, 1);
3006 check_preimage_claim(&nodes[3], &node_txn);
3008 get_announce_close_broadcast_events(&nodes, 2, 3);
3009 assert_eq!(nodes[2].node.list_channels().len(), 0);
3010 assert_eq!(nodes[3].node.list_channels().len(), 1);
3012 // One pending HTLC to time out:
3013 let payment_preimage_2 = route_payment(&nodes[3], &vec!(&nodes[4])[..], 3000000).0;
3016 let mut header = BlockHeader { version: 0x20000000, prev_blockhash: Default::default(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
3017 nodes[3].chain_monitor.block_connected_checked(&header, 1, &Vec::new()[..], &[0; 0]);
3018 for i in 2..TEST_FINAL_CLTV - 3 {
3019 header = BlockHeader { version: 0x20000000, prev_blockhash: header.bitcoin_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
3020 nodes[3].chain_monitor.block_connected_checked(&header, i, &Vec::new()[..], &[0; 0]);
3023 let node_txn = test_txn_broadcast(&nodes[3], &chan_4, None, HTLCType::TIMEOUT);
3025 // Claim the payment on nodes[3], giving it knowledge of the preimage
3026 claim_funds!(nodes[4], nodes[3], payment_preimage_2);
3028 header = BlockHeader { version: 0x20000000, prev_blockhash: Default::default(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
3029 nodes[4].chain_monitor.block_connected_checked(&header, 1, &Vec::new()[..], &[0; 0]);
3030 for i in 2..TEST_FINAL_CLTV - 3 {
3031 header = BlockHeader { version: 0x20000000, prev_blockhash: header.bitcoin_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
3032 nodes[4].chain_monitor.block_connected_checked(&header, i, &Vec::new()[..], &[0; 0]);
3035 test_txn_broadcast(&nodes[4], &chan_4, None, HTLCType::SUCCESS);
3037 header = BlockHeader { version: 0x20000000, prev_blockhash: header.bitcoin_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
3038 nodes[4].chain_monitor.block_connected_with_filtering(&Block { header, txdata: vec![node_txn[0].clone()] }, TEST_FINAL_CLTV - 5);
3040 check_preimage_claim(&nodes[4], &node_txn);
3042 get_announce_close_broadcast_events(&nodes, 3, 4);
3043 assert_eq!(nodes[3].node.list_channels().len(), 0);
3044 assert_eq!(nodes[4].node.list_channels().len(), 0);
3046 // Create some new channels:
3047 let chan_5 = create_announced_chan_between_nodes(&nodes, 0, 1);
3049 // A pending HTLC which will be revoked:
3050 let payment_preimage_3 = route_payment(&nodes[0], &vec!(&nodes[1])[..], 3000000).0;
3051 // Get the will-be-revoked local txn from nodes[0]
3052 let revoked_local_txn = nodes[0].node.channel_state.lock().unwrap().by_id.iter().next().unwrap().1.last_local_commitment_txn.clone();
3053 // Revoke the old state
3054 claim_payment(&nodes[0], &vec!(&nodes[1])[..], payment_preimage_3);
3057 let mut header = BlockHeader { version: 0x20000000, prev_blockhash: Default::default(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
3058 nodes[1].chain_monitor.block_connected_with_filtering(&Block { header, txdata: vec![revoked_local_txn[0].clone()] }, 1);
3060 let mut node_txn = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap();
3061 assert_eq!(node_txn.len(), 2);
3062 assert_eq!(node_txn[0].input.len(), 1);
3064 let mut funding_tx_map = HashMap::new();
3065 funding_tx_map.insert(revoked_local_txn[0].txid(), revoked_local_txn[0].clone());
3066 node_txn[0].verify(&funding_tx_map).unwrap();
3067 node_txn.swap_remove(0);
3069 test_txn_broadcast(&nodes[1], &chan_5, None, HTLCType::NONE);
3071 nodes[0].chain_monitor.block_connected_with_filtering(&Block { header, txdata: vec![revoked_local_txn[0].clone()] }, 1);
3072 let node_txn = test_txn_broadcast(&nodes[0], &chan_5, Some(revoked_local_txn[0].clone()), HTLCType::TIMEOUT);
3073 header = BlockHeader { version: 0x20000000, prev_blockhash: header.bitcoin_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
3074 nodes[1].chain_monitor.block_connected_with_filtering(&Block { header, txdata: vec![node_txn[1].clone()] }, 1);
3076 //TODO: At this point nodes[1] should claim the revoked HTLC-Timeout output, but that's
3077 //not yet implemented in ChannelMonitor
3079 get_announce_close_broadcast_events(&nodes, 0, 1);
3080 assert_eq!(nodes[0].node.list_channels().len(), 0);
3081 assert_eq!(nodes[1].node.list_channels().len(), 0);
3083 // Check that we processed all pending events
3085 assert_eq!(node.node.get_and_clear_pending_events().len(), 0);
3086 assert_eq!(node.chan_monitor.added_monitors.lock().unwrap().len(), 0);
3091 fn test_unconf_chan() {
3092 // After creating a chan between nodes, we disconnect all blocks previously seen to force a channel close on nodes[0] side
3093 let nodes = create_network(2);
3094 create_announced_chan_between_nodes(&nodes, 0, 1);
3096 let channel_state = nodes[0].node.channel_state.lock().unwrap();
3097 assert_eq!(channel_state.by_id.len(), 1);
3098 assert_eq!(channel_state.short_to_id.len(), 1);
3099 mem::drop(channel_state);
3101 let mut headers = Vec::new();
3102 let mut header = BlockHeader { version: 0x20000000, prev_blockhash: Default::default(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
3103 headers.push(header.clone());
3105 header = BlockHeader { version: 0x20000000, prev_blockhash: header.bitcoin_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
3106 headers.push(header.clone());
3108 while !headers.is_empty() {
3109 nodes[0].node.block_disconnected(&headers.pop().unwrap());
3111 let channel_state = nodes[0].node.channel_state.lock().unwrap();
3112 assert_eq!(channel_state.by_id.len(), 0);
3113 assert_eq!(channel_state.short_to_id.len(), 0);