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;
24 use crypto::mac::{Mac,MacResult};
25 use crypto::hmac::Hmac;
26 use crypto::digest::Digest;
27 use crypto::symmetriccipher::SynchronousStreamCipher;
28 use crypto::chacha20::ChaCha20;
31 use std::collections::HashMap;
32 use std::collections::hash_map;
33 use std::sync::{Mutex,MutexGuard,Arc};
34 use std::sync::atomic::{AtomicUsize, Ordering};
35 use std::time::{Instant,Duration};
37 mod channel_held_info {
40 /// Stores the info we will need to send when we want to forward an HTLC onwards
41 pub struct PendingForwardHTLCInfo {
42 pub(super) onion_packet: Option<msgs::OnionPacket>,
43 pub(super) payment_hash: [u8; 32],
44 pub(super) short_channel_id: u64,
45 pub(super) prev_short_channel_id: u64,
46 pub(super) amt_to_forward: u64,
47 pub(super) outgoing_cltv_value: u32,
50 #[cfg(feature = "fuzztarget")]
51 impl PendingForwardHTLCInfo {
52 pub fn dummy() -> Self {
55 payment_hash: [0; 32],
57 prev_short_channel_id: 0,
59 outgoing_cltv_value: 0,
64 #[derive(Clone)] // See Channel::revoke_and_ack for why, tl;dr: Rust bug
65 pub enum HTLCFailReason {
67 err: msgs::OnionErrorPacket,
75 #[cfg(feature = "fuzztarget")]
77 pub fn dummy() -> Self {
78 HTLCFailReason::Reason {
79 failure_code: 0, data: Vec::new(),
84 #[cfg(feature = "fuzztarget")]
85 pub use self::channel_held_info::*;
86 #[cfg(not(feature = "fuzztarget"))]
87 pub(crate) use self::channel_held_info::*;
89 enum PendingOutboundHTLC {
91 source_short_channel_id: u64,
92 incoming_packet_shared_secret: SharedSecret,
96 session_priv: SecretKey,
98 /// Used for channel rebalancing
100 source_short_channel_id: u64,
101 incoming_packet_shared_secret: SharedSecret,
103 session_priv: SecretKey,
107 /// We hold back HTLCs we intend to relay for a random interval in the range (this, 5*this). This
108 /// provides some limited amount of privacy. Ideally this would range from somewhere like 1 second
109 /// to 30 seconds, but people expect lightning to be, you know, kinda fast, sadly. We could
110 /// probably increase this significantly.
111 const MIN_HTLC_RELAY_HOLDING_CELL_MILLIS: u32 = 50;
113 struct ChannelHolder {
114 by_id: HashMap<[u8; 32], Channel>,
115 short_to_id: HashMap<u64, [u8; 32]>,
116 next_forward: Instant,
117 /// short channel id -> forward infos. Key of 0 means payments received
118 /// Note that while this is held in the same mutex as the channels themselves, no consistency
119 /// guarantees are made about there existing a channel with the short id here, nor the short
120 /// ids in the PendingForwardHTLCInfo!
121 forward_htlcs: HashMap<u64, Vec<PendingForwardHTLCInfo>>,
122 /// Note that while this is held in the same mutex as the channels themselves, no consistency
123 /// guarantees are made about the channels given here actually existing anymore by the time you
125 claimable_htlcs: HashMap<[u8; 32], PendingOutboundHTLC>,
127 struct MutChannelHolder<'a> {
128 by_id: &'a mut HashMap<[u8; 32], Channel>,
129 short_to_id: &'a mut HashMap<u64, [u8; 32]>,
130 next_forward: &'a mut Instant,
131 forward_htlcs: &'a mut HashMap<u64, Vec<PendingForwardHTLCInfo>>,
132 claimable_htlcs: &'a mut HashMap<[u8; 32], PendingOutboundHTLC>,
135 fn borrow_parts(&mut self) -> MutChannelHolder {
137 by_id: &mut self.by_id,
138 short_to_id: &mut self.short_to_id,
139 next_forward: &mut self.next_forward,
140 /// short channel id -> forward infos. Key of 0 means payments received
141 forward_htlcs: &mut self.forward_htlcs,
142 claimable_htlcs: &mut self.claimable_htlcs,
147 /// Manager which keeps track of a number of channels and sends messages to the appropriate
148 /// channel, also tracking HTLC preimages and forwarding onion packets appropriately.
149 /// Implements ChannelMessageHandler, handling the multi-channel parts and passing things through
150 /// to individual Channels.
151 pub struct ChannelManager {
152 genesis_hash: Sha256dHash,
153 fee_estimator: Arc<FeeEstimator>,
154 monitor: Arc<ManyChannelMonitor>,
155 chain_monitor: Arc<ChainWatchInterface>,
156 tx_broadcaster: Arc<BroadcasterInterface>,
158 announce_channels_publicly: bool,
159 fee_proportional_millionths: u32,
160 latest_block_height: AtomicUsize, //TODO: Compile-time assert this is at least 32-bits long
163 channel_state: Mutex<ChannelHolder>,
164 our_network_key: SecretKey,
166 pending_events: Mutex<Vec<events::Event>>,
169 const CLTV_EXPIRY_DELTA: u16 = 6 * 24 * 2; //TODO?
171 macro_rules! secp_call {
175 //TODO: Make the err a parameter!
176 Err(_) => return Err(HandleError{err: "Key error", action: None})
183 shared_secret: SharedSecret,
185 blinding_factor: [u8; 32],
186 ephemeral_pubkey: PublicKey,
191 pub struct ChannelDetails {
192 /// The channel's ID (prior to funding transaction generation, this is a random 32 bytes,
193 /// thereafter this is the txid of the funding transaction xor the funding transaction output).
194 /// Note that this means this value is *not* persistent - it can change once during the
195 /// lifetime of the channel.
196 pub channel_id: [u8; 32],
197 /// The position of the funding transaction in the chain. None if the funding transaction has
198 /// not yet been confirmed and the channel fully opened.
199 pub short_channel_id: Option<u64>,
200 pub remote_network_id: PublicKey,
201 pub channel_value_satoshis: u64,
202 /// The user_id passed in to create_channel, or 0 if the channel was inbound.
206 impl ChannelManager {
207 /// Constructs a new ChannelManager to hold several channels and route between them. This is
208 /// the main "logic hub" for all channel-related actions, and implements ChannelMessageHandler.
209 /// fee_proportional_millionths is an optional fee to charge any payments routed through us.
210 /// Non-proportional fees are fixed according to our risk using the provided fee estimator.
211 /// panics if channel_value_satoshis is >= `MAX_FUNDING_SATOSHIS`!
212 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>) -> Result<Arc<ChannelManager>, secp256k1::Error> {
213 let secp_ctx = Secp256k1::new();
215 let res = Arc::new(ChannelManager {
216 genesis_hash: genesis_block(network).header.bitcoin_hash(),
217 fee_estimator: feeest.clone(),
218 monitor: monitor.clone(),
222 announce_channels_publicly,
223 fee_proportional_millionths,
224 latest_block_height: AtomicUsize::new(0), //TODO: Get an init value (generally need to replay recent chain on chain_monitor registration)
227 channel_state: Mutex::new(ChannelHolder{
228 by_id: HashMap::new(),
229 short_to_id: HashMap::new(),
230 next_forward: Instant::now(),
231 forward_htlcs: HashMap::new(),
232 claimable_htlcs: HashMap::new(),
236 pending_events: Mutex::new(Vec::new()),
238 let weak_res = Arc::downgrade(&res);
239 res.chain_monitor.register_listener(weak_res);
243 /// Creates a new outbound channel to the given remote node and with the given value.
244 /// user_id will be provided back as user_channel_id in FundingGenerationReady and
245 /// FundingBroadcastSafe events to allow tracking of which events correspond with which
246 /// create_channel call. Note that user_channel_id defaults to 0 for inbound channels, so you
247 /// may wish to avoid using 0 for user_id here.
248 /// If successful, will generate a SendOpenChannel event, so you should probably poll
249 /// PeerManager::process_events afterwards.
250 pub fn create_channel(&self, their_network_key: PublicKey, channel_value_satoshis: u64, user_id: u64) -> Result<(), HandleError> {
251 let chan_keys = if cfg!(feature = "fuzztarget") {
253 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(),
254 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(),
255 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(),
256 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(),
257 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(),
258 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(),
259 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(),
260 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],
263 let mut key_seed = [0u8; 32];
264 rng::fill_bytes(&mut key_seed);
265 match ChannelKeys::new_from_seed(&key_seed) {
267 Err(_) => panic!("RNG is busted!")
271 let channel = Channel::new_outbound(&*self.fee_estimator, chan_keys, their_network_key, channel_value_satoshis, self.announce_channels_publicly, user_id);
272 let res = channel.get_open_channel(self.genesis_hash.clone(), &*self.fee_estimator)?;
273 let mut channel_state = self.channel_state.lock().unwrap();
274 match channel_state.by_id.insert(channel.channel_id(), channel) {
275 Some(_) => panic!("RNG is bad???"),
279 let mut events = self.pending_events.lock().unwrap();
280 events.push(events::Event::SendOpenChannel {
281 node_id: their_network_key,
287 /// Gets the list of open channels, in random order. See ChannelDetail field documentation for
288 /// more information.
289 pub fn list_channels(&self) -> Vec<ChannelDetails> {
290 let channel_state = self.channel_state.lock().unwrap();
291 let mut res = Vec::with_capacity(channel_state.by_id.len());
292 for (channel_id, channel) in channel_state.by_id.iter() {
293 res.push(ChannelDetails {
294 channel_id: (*channel_id).clone(),
295 short_channel_id: channel.get_short_channel_id(),
296 remote_network_id: channel.get_their_node_id(),
297 channel_value_satoshis: channel.get_value_satoshis(),
298 user_id: channel.get_user_id(),
304 /// Gets the list of usable channels, in random order. Useful as an argument to
305 /// Router::get_route to ensure non-announced channels are used.
306 pub fn list_usable_channels(&self) -> Vec<ChannelDetails> {
307 let channel_state = self.channel_state.lock().unwrap();
308 let mut res = Vec::with_capacity(channel_state.by_id.len());
309 for (channel_id, channel) in channel_state.by_id.iter() {
310 if channel.is_usable() {
311 res.push(ChannelDetails {
312 channel_id: (*channel_id).clone(),
313 short_channel_id: channel.get_short_channel_id(),
314 remote_network_id: channel.get_their_node_id(),
315 channel_value_satoshis: channel.get_value_satoshis(),
316 user_id: channel.get_user_id(),
323 /// Begins the process of closing a channel. After this call (plus some timeout), no new HTLCs
324 /// will be accepted on the given channel, and after additional timeout/the closing of all
325 /// pending HTLCs, the channel will be closed on chain.
326 /// May generate a SendShutdown event on success, which should be relayed.
327 pub fn close_channel(&self, channel_id: &[u8; 32]) -> Result<(), HandleError> {
328 let (res, node_id, chan_option) = {
329 let mut channel_state_lock = self.channel_state.lock().unwrap();
330 let channel_state = channel_state_lock.borrow_parts();
331 match channel_state.by_id.entry(channel_id.clone()) {
332 hash_map::Entry::Occupied(mut chan_entry) => {
333 let res = chan_entry.get_mut().get_shutdown()?;
334 if chan_entry.get().is_shutdown() {
335 if let Some(short_id) = chan_entry.get().get_short_channel_id() {
336 channel_state.short_to_id.remove(&short_id);
338 (res, chan_entry.get().get_their_node_id(), Some(chan_entry.remove_entry().1))
339 } else { (res, chan_entry.get().get_their_node_id(), None) }
341 hash_map::Entry::Vacant(_) => return Err(HandleError{err: "No such channel", action: None})
344 for payment_hash in res.1 {
345 // unknown_next_peer...I dunno who that is anymore....
346 self.fail_htlc_backwards_internal(self.channel_state.lock().unwrap(), &payment_hash, HTLCFailReason::Reason { failure_code: 0x4000 | 10, data: Vec::new() });
348 let chan_update = if let Some(chan) = chan_option {
349 if let Ok(update) = self.get_channel_update(&chan) {
354 let mut events = self.pending_events.lock().unwrap();
355 if let Some(update) = chan_update {
356 events.push(events::Event::BroadcastChannelUpdate {
360 events.push(events::Event::SendShutdown {
369 fn gen_rho_mu_from_shared_secret(shared_secret: &SharedSecret) -> ([u8; 32], [u8; 32]) {
371 let mut hmac = Hmac::new(Sha256::new(), &[0x72, 0x68, 0x6f]); // rho
372 hmac.input(&shared_secret[..]);
373 let mut res = [0; 32];
374 hmac.raw_result(&mut res);
378 let mut hmac = Hmac::new(Sha256::new(), &[0x6d, 0x75]); // mu
379 hmac.input(&shared_secret[..]);
380 let mut res = [0; 32];
381 hmac.raw_result(&mut res);
387 fn gen_um_from_shared_secret(shared_secret: &SharedSecret) -> [u8; 32] {
388 let mut hmac = Hmac::new(Sha256::new(), &[0x75, 0x6d]); // um
389 hmac.input(&shared_secret[..]);
390 let mut res = [0; 32];
391 hmac.raw_result(&mut res);
396 fn gen_ammag_from_shared_secret(shared_secret: &SharedSecret) -> [u8; 32] {
397 let mut hmac = Hmac::new(Sha256::new(), &[0x61, 0x6d, 0x6d, 0x61, 0x67]); // ammag
398 hmac.input(&shared_secret[..]);
399 let mut res = [0; 32];
400 hmac.raw_result(&mut res);
404 // can only fail if an intermediary hop has an invalid public key or session_priv is invalid
406 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> {
407 let mut blinded_priv = session_priv.clone();
408 let mut blinded_pub = secp_call!(PublicKey::from_secret_key(secp_ctx, &blinded_priv));
409 let mut first_iteration = true;
411 for hop in route.hops.iter() {
412 let shared_secret = SharedSecret::new(secp_ctx, &hop.pubkey, &blinded_priv);
414 let mut sha = Sha256::new();
415 sha.input(&blinded_pub.serialize()[..]);
416 sha.input(&shared_secret[..]);
417 let mut blinding_factor = [0u8; 32];
418 sha.result(&mut blinding_factor);
421 blinded_pub = secp_call!(PublicKey::from_secret_key(secp_ctx, &blinded_priv));
422 first_iteration = false;
424 let ephemeral_pubkey = blinded_pub;
426 secp_call!(blinded_priv.mul_assign(secp_ctx, &secp_call!(SecretKey::from_slice(secp_ctx, &blinding_factor))));
427 blinded_pub = secp_call!(PublicKey::from_secret_key(secp_ctx, &blinded_priv));
429 callback(shared_secret, blinding_factor, ephemeral_pubkey, hop);
435 // can only fail if an intermediary hop has an invalid public key or session_priv is invalid
436 fn construct_onion_keys(secp_ctx: &Secp256k1, route: &Route, session_priv: &SecretKey) -> Result<Vec<OnionKeys>, HandleError> {
437 let mut res = Vec::with_capacity(route.hops.len());
439 Self::construct_onion_keys_callback(secp_ctx, route, session_priv, |shared_secret, _blinding_factor, ephemeral_pubkey, _| {
440 let (rho, mu) = ChannelManager::gen_rho_mu_from_shared_secret(&shared_secret);
446 blinding_factor: _blinding_factor,
456 /// returns the hop data, as well as the first-hop value_msat and CLTV value we should send.
457 fn build_onion_payloads(route: &Route, starting_htlc_offset: u32) -> Result<(Vec<msgs::OnionHopData>, u64, u32), HandleError> {
458 let mut cur_value_msat = 0u64;
459 let mut cur_cltv = starting_htlc_offset;
460 let mut last_short_channel_id = 0;
461 let mut res: Vec<msgs::OnionHopData> = Vec::with_capacity(route.hops.len());
462 internal_traits::test_no_dealloc::<msgs::OnionHopData>(None);
463 unsafe { res.set_len(route.hops.len()); }
465 for (idx, hop) in route.hops.iter().enumerate().rev() {
466 // First hop gets special values so that it can check, on receipt, that everything is
467 // exactly as it should be (and the next hop isn't trying to probe to find out if we're
468 // the intended recipient).
469 let value_msat = if cur_value_msat == 0 { hop.fee_msat } else { cur_value_msat };
470 let cltv = if cur_cltv == starting_htlc_offset { hop.cltv_expiry_delta + starting_htlc_offset } else { cur_cltv };
471 res[idx] = msgs::OnionHopData {
473 data: msgs::OnionRealm0HopData {
474 short_channel_id: last_short_channel_id,
475 amt_to_forward: value_msat,
476 outgoing_cltv_value: cltv,
480 cur_value_msat += hop.fee_msat;
481 if cur_value_msat >= 21000000 * 100000000 * 1000 {
482 return Err(HandleError{err: "Channel fees overflowed?!", action: None});
484 cur_cltv += hop.cltv_expiry_delta as u32;
485 if cur_cltv >= 500000000 {
486 return Err(HandleError{err: "Channel CLTV overflowed?!", action: None});
488 last_short_channel_id = hop.short_channel_id;
490 Ok((res, cur_value_msat, cur_cltv))
494 fn shift_arr_right(arr: &mut [u8; 20*65]) {
496 ptr::copy(arr[0..].as_ptr(), arr[65..].as_mut_ptr(), 19*65);
504 fn xor_bufs(dst: &mut[u8], src: &[u8]) {
505 assert_eq!(dst.len(), src.len());
507 for i in 0..dst.len() {
512 const ZERO:[u8; 21*65] = [0; 21*65];
513 fn construct_onion_packet(mut payloads: Vec<msgs::OnionHopData>, onion_keys: Vec<OnionKeys>, associated_data: &[u8; 32]) -> Result<msgs::OnionPacket, HandleError> {
514 let mut buf = Vec::with_capacity(21*65);
515 buf.resize(21*65, 0);
518 let iters = payloads.len() - 1;
519 let end_len = iters * 65;
520 let mut res = Vec::with_capacity(end_len);
521 res.resize(end_len, 0);
523 for (i, keys) in onion_keys.iter().enumerate() {
524 if i == payloads.len() - 1 { continue; }
525 let mut chacha = ChaCha20::new(&keys.rho, &[0u8; 8]);
526 chacha.process(&ChannelManager::ZERO, &mut buf); // We don't have a seek function :(
527 ChannelManager::xor_bufs(&mut res[0..(i + 1)*65], &buf[(20 - i)*65..21*65]);
532 let mut packet_data = [0; 20*65];
533 let mut hmac_res = [0; 32];
535 for (i, (payload, keys)) in payloads.iter_mut().zip(onion_keys.iter()).rev().enumerate() {
536 ChannelManager::shift_arr_right(&mut packet_data);
537 payload.hmac = hmac_res;
538 packet_data[0..65].copy_from_slice(&payload.encode()[..]);
540 let mut chacha = ChaCha20::new(&keys.rho, &[0u8; 8]);
541 chacha.process(&packet_data, &mut buf[0..20*65]);
542 packet_data[..].copy_from_slice(&buf[0..20*65]);
545 packet_data[20*65 - filler.len()..20*65].copy_from_slice(&filler[..]);
548 let mut hmac = Hmac::new(Sha256::new(), &keys.mu);
549 hmac.input(&packet_data);
550 hmac.input(&associated_data[..]);
551 hmac.raw_result(&mut hmac_res);
554 Ok(msgs::OnionPacket{
556 public_key: onion_keys.first().unwrap().ephemeral_pubkey,
557 hop_data: packet_data,
562 /// Encrypts a failure packet. raw_packet can either be a
563 /// msgs::DecodedOnionErrorPacket.encode() result or a msgs::OnionErrorPacket.data element.
564 fn encrypt_failure_packet(shared_secret: &SharedSecret, raw_packet: &[u8]) -> msgs::OnionErrorPacket {
565 let ammag = ChannelManager::gen_ammag_from_shared_secret(&shared_secret);
567 let mut packet_crypted = Vec::with_capacity(raw_packet.len());
568 packet_crypted.resize(raw_packet.len(), 0);
569 let mut chacha = ChaCha20::new(&ammag, &[0u8; 8]);
570 chacha.process(&raw_packet, &mut packet_crypted[..]);
571 msgs::OnionErrorPacket {
572 data: packet_crypted,
576 fn build_failure_packet(shared_secret: &SharedSecret, failure_type: u16, failure_data: &[u8]) -> msgs::DecodedOnionErrorPacket {
577 assert!(failure_data.len() <= 256 - 2);
579 let um = ChannelManager::gen_um_from_shared_secret(&shared_secret);
582 let mut res = Vec::with_capacity(2 + failure_data.len());
583 res.push(((failure_type >> 8) & 0xff) as u8);
584 res.push(((failure_type >> 0) & 0xff) as u8);
585 res.extend_from_slice(&failure_data[..]);
589 let mut res = Vec::with_capacity(256 - 2 - failure_data.len());
590 res.resize(256 - 2 - failure_data.len(), 0);
593 let mut packet = msgs::DecodedOnionErrorPacket {
595 failuremsg: failuremsg,
599 let mut hmac = Hmac::new(Sha256::new(), &um);
600 hmac.input(&packet.encode()[32..]);
601 hmac.raw_result(&mut packet.hmac);
607 fn build_first_hop_failure_packet(shared_secret: &SharedSecret, failure_type: u16, failure_data: &[u8]) -> msgs::OnionErrorPacket {
608 let failure_packet = ChannelManager::build_failure_packet(shared_secret, failure_type, failure_data);
609 ChannelManager::encrypt_failure_packet(shared_secret, &failure_packet.encode()[..])
612 /// only fails if the channel does not yet have an assigned short_id
613 fn get_channel_update(&self, chan: &Channel) -> Result<msgs::ChannelUpdate, HandleError> {
614 let short_channel_id = match chan.get_short_channel_id() {
615 None => return Err(HandleError{err: "Channel not yet established", action: None}),
619 let were_node_one = PublicKey::from_secret_key(&self.secp_ctx, &self.our_network_key).unwrap().serialize()[..] < chan.get_their_node_id().serialize()[..];
621 let unsigned = msgs::UnsignedChannelUpdate {
622 chain_hash: self.genesis_hash,
623 short_channel_id: short_channel_id,
624 timestamp: chan.get_channel_update_count(),
625 flags: (!were_node_one) as u16 | ((!chan.is_live() as u16) << 1),
626 cltv_expiry_delta: CLTV_EXPIRY_DELTA,
627 htlc_minimum_msat: chan.get_our_htlc_minimum_msat(),
628 fee_base_msat: chan.get_our_fee_base_msat(&*self.fee_estimator),
629 fee_proportional_millionths: self.fee_proportional_millionths,
632 let msg_hash = Sha256dHash::from_data(&unsigned.encode()[..]);
633 let sig = self.secp_ctx.sign(&Message::from_slice(&msg_hash[..]).unwrap(), &self.our_network_key).unwrap(); //TODO Can we unwrap here?
635 Ok(msgs::ChannelUpdate {
641 /// Sends a payment along a given route.
642 /// Value parameters are provided via the last hop in route, see documentation for RouteHop
643 /// fields for more info.
644 /// Note that if the payment_hash already exists elsewhere (eg you're sending a duplicative
645 /// payment), we don't do anything to stop you! We always try to ensure that if the provided
646 /// next hop knows the preimage to payment_hash they can claim an additional amount as
647 /// specified in the last hop in the route! Thus, you should probably do your own
648 /// payment_preimage tracking (which you should already be doing as they represent "proof of
649 /// payment") and prevent double-sends yourself.
650 /// See-also docs on Channel::send_htlc_and_commit.
651 /// May generate a SendHTLCs event on success, which should be relayed.
652 pub fn send_payment(&self, route: Route, payment_hash: [u8; 32]) -> Result<(), HandleError> {
653 if route.hops.len() < 1 || route.hops.len() > 20 {
654 return Err(HandleError{err: "Route didn't go anywhere/had bogus size", action: None});
656 let our_node_id = self.get_our_node_id();
657 for (idx, hop) in route.hops.iter().enumerate() {
658 if idx != route.hops.len() - 1 && hop.pubkey == our_node_id {
659 return Err(HandleError{err: "Route went through us but wasn't a simple rebalance loop to us", action: None});
663 let session_priv = secp_call!(SecretKey::from_slice(&self.secp_ctx, &{
664 let mut session_key = [0; 32];
665 rng::fill_bytes(&mut session_key);
669 let cur_height = self.latest_block_height.load(Ordering::Acquire) as u32 + 1;
671 let onion_keys = ChannelManager::construct_onion_keys(&self.secp_ctx, &route, &session_priv)?;
672 let (onion_payloads, htlc_msat, htlc_cltv) = ChannelManager::build_onion_payloads(&route, cur_height)?;
673 let onion_packet = ChannelManager::construct_onion_packet(onion_payloads, onion_keys, &payment_hash)?;
675 let (first_hop_node_id, (update_add, commitment_signed, chan_monitor)) = {
676 let mut channel_state_lock = self.channel_state.lock().unwrap();
677 let channel_state = channel_state_lock.borrow_parts();
679 let id = match channel_state.short_to_id.get(&route.hops.first().unwrap().short_channel_id) {
680 None => return Err(HandleError{err: "No channel available with first hop!", action: None}),
681 Some(id) => id.clone()
684 let claimable_htlc_entry = channel_state.claimable_htlcs.entry(payment_hash.clone());
685 if let hash_map::Entry::Occupied(_) = claimable_htlc_entry {
686 return Err(HandleError{err: "Already had pending HTLC with the same payment_hash", action: None});
690 let chan = channel_state.by_id.get_mut(&id).unwrap();
691 if chan.get_their_node_id() != route.hops.first().unwrap().pubkey {
692 return Err(HandleError{err: "Node ID mismatch on first hop!", action: None});
694 chan.send_htlc_and_commit(htlc_msat, payment_hash, htlc_cltv, onion_packet)?
697 let first_hop_node_id = route.hops.first().unwrap().pubkey;
699 claimable_htlc_entry.or_insert(PendingOutboundHTLC::OutboundRoute {
705 Some(msgs) => (first_hop_node_id, msgs),
706 None => return Ok(()),
710 if let Err(_e) = self.monitor.add_update_monitor(chan_monitor.get_funding_txo().unwrap(), chan_monitor) {
711 unimplemented!(); // maybe remove from claimable_htlcs?
714 let mut events = self.pending_events.lock().unwrap();
715 events.push(events::Event::SendHTLCs {
716 node_id: first_hop_node_id,
717 msgs: vec![update_add],
718 commitment_msg: commitment_signed,
723 /// Call this upon creation of a funding transaction for the given channel.
724 /// Panics if a funding transaction has already been provided for this channel.
725 pub fn funding_transaction_generated(&self, temporary_channel_id: &[u8; 32], funding_txo: OutPoint) {
726 macro_rules! add_pending_event {
729 let mut pending_events = self.pending_events.lock().unwrap();
730 pending_events.push($event);
735 let (chan, msg, chan_monitor) = {
736 let mut channel_state = self.channel_state.lock().unwrap();
737 match channel_state.by_id.remove(temporary_channel_id) {
739 match chan.get_outbound_funding_created(funding_txo) {
741 (chan, funding_msg.0, funding_msg.1)
744 mem::drop(channel_state);
745 add_pending_event!(events::Event::DisconnectPeer {
746 node_id: chan.get_their_node_id(),
747 msg: if let Some(msgs::ErrorAction::DisconnectPeer { msg } ) = e.action { msg } else { None },
756 }; // Release channel lock for install_watch_outpoint call,
757 if let Err(_e) = self.monitor.add_update_monitor(chan_monitor.get_funding_txo().unwrap(), chan_monitor) {
758 unimplemented!(); // maybe remove from claimable_htlcs?
760 add_pending_event!(events::Event::SendFundingCreated {
761 node_id: chan.get_their_node_id(),
765 let mut channel_state = self.channel_state.lock().unwrap();
766 channel_state.by_id.insert(chan.channel_id(), chan);
769 fn get_announcement_sigs(&self, chan: &Channel) -> Result<Option<msgs::AnnouncementSignatures>, HandleError> {
770 if !chan.is_usable() || !chan.should_announce() { return Ok(None) }
772 let (announcement, our_bitcoin_sig) = chan.get_channel_announcement(self.get_our_node_id(), self.genesis_hash.clone())?;
773 let msghash = Message::from_slice(&Sha256dHash::from_data(&announcement.encode()[..])[..]).unwrap();
774 let our_node_sig = secp_call!(self.secp_ctx.sign(&msghash, &self.our_network_key));
776 Ok(Some(msgs::AnnouncementSignatures {
777 channel_id: chan.channel_id(),
778 short_channel_id: chan.get_short_channel_id().unwrap(),
779 node_signature: our_node_sig,
780 bitcoin_signature: our_bitcoin_sig,
784 /// Processes HTLCs which are pending waiting on random forward delay.
785 /// Should only really ever be called in response to an PendingHTLCsForwardable event.
786 /// Will likely generate further events.
787 pub fn process_pending_htlc_forwards(&self) {
788 let mut new_events = Vec::new();
789 let mut failed_forwards = Vec::new();
791 let mut channel_state_lock = self.channel_state.lock().unwrap();
792 let channel_state = channel_state_lock.borrow_parts();
794 if cfg!(not(feature = "fuzztarget")) && Instant::now() < *channel_state.next_forward {
798 for (short_chan_id, pending_forwards) in channel_state.forward_htlcs.drain() {
799 if short_chan_id != 0 {
800 let forward_chan_id = match channel_state.short_to_id.get(&short_chan_id) {
801 Some(chan_id) => chan_id.clone(),
803 failed_forwards.reserve(pending_forwards.len());
804 for forward_info in pending_forwards {
805 failed_forwards.push((forward_info.payment_hash, 0x4000 | 10, None));
810 let forward_chan = &mut channel_state.by_id.get_mut(&forward_chan_id).unwrap();
812 let mut add_htlc_msgs = Vec::new();
813 for forward_info in pending_forwards {
814 match forward_chan.send_htlc(forward_info.amt_to_forward, forward_info.payment_hash, forward_info.outgoing_cltv_value, forward_info.onion_packet.unwrap()) {
816 let chan_update = self.get_channel_update(forward_chan).unwrap();
817 failed_forwards.push((forward_info.payment_hash, 0x1000 | 7, Some(chan_update)));
822 Some(msg) => { add_htlc_msgs.push(msg); },
824 // Nothing to do here...we're waiting on a remote
825 // revoke_and_ack before we can add anymore HTLCs. The Channel
826 // will automatically handle building the update_add_htlc and
827 // commitment_signed messages when we can.
828 // TODO: Do some kind of timer to set the channel as !is_live()
829 // as we don't really want others relying on us relaying through
830 // this channel currently :/.
837 if !add_htlc_msgs.is_empty() {
838 let (commitment_msg, monitor) = match forward_chan.send_commitment() {
841 //TODO: Handle...this is bad!
845 new_events.push((Some(monitor), events::Event::SendHTLCs {
846 node_id: forward_chan.get_their_node_id(),
848 commitment_msg: commitment_msg,
852 for forward_info in pending_forwards {
853 new_events.push((None, events::Event::PaymentReceived {
854 payment_hash: forward_info.payment_hash,
855 amt: forward_info.amt_to_forward,
862 for failed_forward in failed_forwards.drain(..) {
863 match failed_forward.2 {
864 None => self.fail_htlc_backwards_internal(self.channel_state.lock().unwrap(), &failed_forward.0, HTLCFailReason::Reason { failure_code: failed_forward.1, data: Vec::new() }),
865 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() }),
869 if new_events.is_empty() { return }
871 new_events.retain(|event| {
872 if let &Some(ref monitor) = &event.0 {
873 if let Err(_e) = self.monitor.add_update_monitor(monitor.get_funding_txo().unwrap(), monitor.clone()) {
874 unimplemented!();// but def dont push the event...
880 let mut events = self.pending_events.lock().unwrap();
881 events.reserve(new_events.len());
882 for event in new_events.drain(..) {
883 events.push(event.1);
887 /// Indicates that the preimage for payment_hash is unknown after a PaymentReceived event.
888 pub fn fail_htlc_backwards(&self, payment_hash: &[u8; 32]) -> bool {
889 self.fail_htlc_backwards_internal(self.channel_state.lock().unwrap(), payment_hash, HTLCFailReason::Reason { failure_code: 0x4000 | 15, data: Vec::new() })
892 /// Fails an HTLC backwards to the sender of it to us.
893 /// Note that while we take a channel_state lock as input, we do *not* assume consistency here.
894 /// There are several callsites that do stupid things like loop over a list of payment_hashes
895 /// to fail and take the channel_state lock for each iteration (as we take ownership and may
896 /// drop it). In other words, no assumptions are made that entries in claimable_htlcs point to
897 /// still-available channels.
898 fn fail_htlc_backwards_internal(&self, mut channel_state: MutexGuard<ChannelHolder>, payment_hash: &[u8; 32], onion_error: HTLCFailReason) -> bool {
899 let mut pending_htlc = {
900 match channel_state.claimable_htlcs.remove(payment_hash) {
901 Some(pending_htlc) => pending_htlc,
902 None => return false,
907 PendingOutboundHTLC::CycledRoute { source_short_channel_id, incoming_packet_shared_secret, route, session_priv } => {
908 channel_state.claimable_htlcs.insert(payment_hash.clone(), PendingOutboundHTLC::OutboundRoute {
912 pending_htlc = PendingOutboundHTLC::IntermediaryHopData { source_short_channel_id, incoming_packet_shared_secret };
918 PendingOutboundHTLC::CycledRoute { .. } => unreachable!(),
919 PendingOutboundHTLC::OutboundRoute { .. } => {
920 mem::drop(channel_state);
922 let mut pending_events = self.pending_events.lock().unwrap();
923 pending_events.push(events::Event::PaymentFailed {
924 payment_hash: payment_hash.clone()
928 PendingOutboundHTLC::IntermediaryHopData { source_short_channel_id, incoming_packet_shared_secret } => {
929 let err_packet = match onion_error {
930 HTLCFailReason::Reason { failure_code, data } => {
931 let packet = ChannelManager::build_failure_packet(&incoming_packet_shared_secret, failure_code, &data[..]).encode();
932 ChannelManager::encrypt_failure_packet(&incoming_packet_shared_secret, &packet)
934 HTLCFailReason::ErrorPacket { err } => {
935 ChannelManager::encrypt_failure_packet(&incoming_packet_shared_secret, &err.data)
939 let (node_id, fail_msgs) = {
940 let chan_id = match channel_state.short_to_id.get(&source_short_channel_id) {
941 Some(chan_id) => chan_id.clone(),
945 let chan = channel_state.by_id.get_mut(&chan_id).unwrap();
946 match chan.get_update_fail_htlc_and_commit(payment_hash, err_packet) {
947 Ok(msg) => (chan.get_their_node_id(), msg),
949 //TODO: Do something with e?
956 Some((msg, commitment_msg, chan_monitor)) => {
957 mem::drop(channel_state);
959 if let Err(_e) = self.monitor.add_update_monitor(chan_monitor.get_funding_txo().unwrap(), chan_monitor) {
960 unimplemented!();// but def dont push the event...
963 let mut pending_events = self.pending_events.lock().unwrap();
964 pending_events.push(events::Event::SendFailHTLC {
967 commitment_msg: commitment_msg,
978 /// Provides a payment preimage in response to a PaymentReceived event, returning true and
979 /// generating message events for the net layer to claim the payment, if possible. Thus, you
980 /// should probably kick the net layer to go send messages if this returns true!
981 /// May panic if called except in response to a PaymentReceived event.
982 pub fn claim_funds(&self, payment_preimage: [u8; 32]) -> bool {
983 self.claim_funds_internal(payment_preimage, true)
985 fn claim_funds_internal(&self, payment_preimage: [u8; 32], from_user: bool) -> bool {
986 let mut sha = Sha256::new();
987 sha.input(&payment_preimage);
988 let mut payment_hash = [0; 32];
989 sha.result(&mut payment_hash);
991 let mut channel_state = self.channel_state.lock().unwrap();
992 let mut pending_htlc = {
993 match channel_state.claimable_htlcs.remove(&payment_hash) {
994 Some(pending_htlc) => pending_htlc,
995 None => return false,
1000 PendingOutboundHTLC::CycledRoute { source_short_channel_id, incoming_packet_shared_secret, route, session_priv } => {
1001 if from_user { // This was the end hop back to us
1002 pending_htlc = PendingOutboundHTLC::IntermediaryHopData { source_short_channel_id, incoming_packet_shared_secret };
1003 channel_state.claimable_htlcs.insert(payment_hash, PendingOutboundHTLC::OutboundRoute { route, session_priv });
1004 } else { // This came from the first upstream node
1005 // Bank error in our favor! Maybe we should tell the user this somehow???
1006 pending_htlc = PendingOutboundHTLC::OutboundRoute { route, session_priv };
1007 channel_state.claimable_htlcs.insert(payment_hash, PendingOutboundHTLC::IntermediaryHopData { source_short_channel_id, incoming_packet_shared_secret });
1013 match pending_htlc {
1014 PendingOutboundHTLC::CycledRoute { .. } => unreachable!(),
1015 PendingOutboundHTLC::OutboundRoute { .. } => {
1017 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...");
1019 mem::drop(channel_state);
1020 let mut pending_events = self.pending_events.lock().unwrap();
1021 pending_events.push(events::Event::PaymentSent {
1026 PendingOutboundHTLC::IntermediaryHopData { source_short_channel_id, .. } => {
1027 let (node_id, fulfill_msgs) = {
1028 let chan_id = match channel_state.short_to_id.get(&source_short_channel_id) {
1029 Some(chan_id) => chan_id.clone(),
1031 // TODO: There is probably a channel manager somewhere that needs to
1032 // learn the preimage as the channel already hit the chain and that's
1038 let chan = channel_state.by_id.get_mut(&chan_id).unwrap();
1039 match chan.get_update_fulfill_htlc_and_commit(payment_preimage) {
1040 Ok(msg) => (chan.get_their_node_id(), msg),
1042 // TODO: There is probably a channel manager somewhere that needs to
1043 // learn the preimage as the channel may be about to hit the chain.
1044 //TODO: Do something with e?
1050 mem::drop(channel_state);
1051 if let Some(chan_monitor) = fulfill_msgs.1 {
1052 if let Err(_e) = self.monitor.add_update_monitor(chan_monitor.get_funding_txo().unwrap(), chan_monitor) {
1053 unimplemented!();// but def dont push the event...
1057 if let Some((msg, commitment_msg)) = fulfill_msgs.0 {
1058 let mut pending_events = self.pending_events.lock().unwrap();
1059 pending_events.push(events::Event::SendFulfillHTLC {
1070 /// Gets the node_id held by this ChannelManager
1071 pub fn get_our_node_id(&self) -> PublicKey {
1072 PublicKey::from_secret_key(&self.secp_ctx, &self.our_network_key).unwrap()
1075 /// Used to restore channels to normal operation after a
1076 /// ChannelMonitorUpdateErr::TemporaryFailure was returned from a channel monitor update
1078 pub fn test_restore_channel_monitor(&self) {
1083 impl events::EventsProvider for ChannelManager {
1084 fn get_and_clear_pending_events(&self) -> Vec<events::Event> {
1085 let mut pending_events = self.pending_events.lock().unwrap();
1086 let mut ret = Vec::new();
1087 mem::swap(&mut ret, &mut *pending_events);
1092 impl ChainListener for ChannelManager {
1093 fn block_connected(&self, header: &BlockHeader, height: u32, txn_matched: &[&Transaction], indexes_of_txn_matched: &[u32]) {
1094 let mut new_events = Vec::new();
1096 let mut channel_state = self.channel_state.lock().unwrap();
1097 let mut short_to_ids_to_insert = Vec::new();
1098 let mut short_to_ids_to_remove = Vec::new();
1099 channel_state.by_id.retain(|_, channel| {
1100 if let Some(funding_locked) = channel.block_connected(header, height, txn_matched, indexes_of_txn_matched) {
1101 let announcement_sigs = match self.get_announcement_sigs(channel) {
1104 //TODO: push e on events and blow up the channel (it has bad keys)
1108 new_events.push(events::Event::SendFundingLocked {
1109 node_id: channel.get_their_node_id(),
1110 msg: funding_locked,
1111 announcement_sigs: announcement_sigs
1113 short_to_ids_to_insert.push((channel.get_short_channel_id().unwrap(), channel.channel_id()));
1115 if let Some(funding_txo) = channel.get_funding_txo() {
1116 for tx in txn_matched {
1117 for inp in tx.input.iter() {
1118 if inp.prev_hash == funding_txo.txid && inp.prev_index == funding_txo.index as u32 {
1119 if let Some(short_id) = channel.get_short_channel_id() {
1120 short_to_ids_to_remove.push(short_id);
1122 channel.force_shutdown();
1123 if let Ok(update) = self.get_channel_update(&channel) {
1124 new_events.push(events::Event::BroadcastChannelUpdate {
1133 if channel.channel_monitor().would_broadcast_at_height(height) {
1134 if let Some(short_id) = channel.get_short_channel_id() {
1135 short_to_ids_to_remove.push(short_id);
1137 channel.force_shutdown();
1138 if let Ok(update) = self.get_channel_update(&channel) {
1139 new_events.push(events::Event::BroadcastChannelUpdate {
1147 for to_remove in short_to_ids_to_remove {
1148 channel_state.short_to_id.remove(&to_remove);
1150 for to_insert in short_to_ids_to_insert {
1151 channel_state.short_to_id.insert(to_insert.0, to_insert.1);
1154 let mut pending_events = self.pending_events.lock().unwrap();
1155 for funding_locked in new_events.drain(..) {
1156 pending_events.push(funding_locked);
1158 self.latest_block_height.store(height as usize, Ordering::Release);
1161 /// We force-close the channel without letting our counterparty participate in the shutdown
1162 fn block_disconnected(&self, header: &BlockHeader) {
1163 let mut channel_lock = self.channel_state.lock().unwrap();
1164 let channel_state = channel_lock.borrow_parts();
1165 let short_to_id = channel_state.short_to_id;
1166 channel_state.by_id.retain(|_, v| {
1167 if v.block_disconnected(header) {
1168 let tx = v.force_shutdown();
1169 for broadcast_tx in tx {
1170 self.tx_broadcaster.broadcast_transaction(&broadcast_tx);
1172 if let Some(short_id) = v.get_short_channel_id() {
1173 short_to_id.remove(&short_id);
1180 self.latest_block_height.fetch_sub(1, Ordering::AcqRel);
1184 impl ChannelMessageHandler for ChannelManager {
1185 //TODO: Handle errors and close channel (or so)
1186 fn handle_open_channel(&self, their_node_id: &PublicKey, msg: &msgs::OpenChannel) -> Result<msgs::AcceptChannel, HandleError> {
1187 if msg.chain_hash != self.genesis_hash {
1188 return Err(HandleError{err: "Unknown genesis block hash", action: None});
1190 let mut channel_state = self.channel_state.lock().unwrap();
1191 if channel_state.by_id.contains_key(&msg.temporary_channel_id) {
1192 return Err(HandleError{err: "temporary_channel_id collision!", action: None});
1195 let chan_keys = if cfg!(feature = "fuzztarget") {
1197 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, 0]).unwrap(),
1198 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, 0]).unwrap(),
1199 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, 0]).unwrap(),
1200 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, 0]).unwrap(),
1201 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, 0]).unwrap(),
1202 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, 0]).unwrap(),
1203 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, 0]).unwrap(),
1204 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],
1207 let mut key_seed = [0u8; 32];
1208 rng::fill_bytes(&mut key_seed);
1209 match ChannelKeys::new_from_seed(&key_seed) {
1211 Err(_) => panic!("RNG is busted!")
1215 let channel = Channel::new_from_req(&*self.fee_estimator, chan_keys, their_node_id.clone(), msg, 0, false, self.announce_channels_publicly)?;
1216 let accept_msg = channel.get_accept_channel()?;
1217 channel_state.by_id.insert(channel.channel_id(), channel);
1221 fn handle_accept_channel(&self, their_node_id: &PublicKey, msg: &msgs::AcceptChannel) -> Result<(), HandleError> {
1222 let (value, output_script, user_id) = {
1223 let mut channel_state = self.channel_state.lock().unwrap();
1224 match channel_state.by_id.get_mut(&msg.temporary_channel_id) {
1226 if chan.get_their_node_id() != *their_node_id {
1227 return Err(HandleError{err: "Got a message for a channel from the wrong node!", action: None})
1229 chan.accept_channel(&msg)?;
1230 (chan.get_value_satoshis(), chan.get_funding_redeemscript().to_v0_p2wsh(), chan.get_user_id())
1232 None => return Err(HandleError{err: "Failed to find corresponding channel", action: None})
1235 let mut pending_events = self.pending_events.lock().unwrap();
1236 pending_events.push(events::Event::FundingGenerationReady {
1237 temporary_channel_id: msg.temporary_channel_id,
1238 channel_value_satoshis: value,
1239 output_script: output_script,
1240 user_channel_id: user_id,
1245 fn handle_funding_created(&self, their_node_id: &PublicKey, msg: &msgs::FundingCreated) -> Result<msgs::FundingSigned, HandleError> {
1246 //TODO: broke this - a node shouldn't be able to get their channel removed by sending a
1247 //funding_created a second time, or long after the first, or whatever (note this also
1248 //leaves the short_to_id map in a busted state.
1249 let (chan, funding_msg, monitor_update) = {
1250 let mut channel_state = self.channel_state.lock().unwrap();
1251 match channel_state.by_id.remove(&msg.temporary_channel_id) {
1253 if chan.get_their_node_id() != *their_node_id {
1254 return Err(HandleError{err: "Got a message for a channel from the wrong node!", action: None})
1256 match chan.funding_created(msg) {
1257 Ok((funding_msg, monitor_update)) => {
1258 (chan, funding_msg, monitor_update)
1265 None => return Err(HandleError{err: "Failed to find corresponding channel", action: None})
1267 }; // Release channel lock for install_watch_outpoint call,
1268 // note that this means if the remote end is misbehaving and sends a message for the same
1269 // channel back-to-back with funding_created, we'll end up thinking they sent a message
1270 // for a bogus channel.
1271 if let Err(_e) = self.monitor.add_update_monitor(monitor_update.get_funding_txo().unwrap(), monitor_update) {
1274 let mut channel_state = self.channel_state.lock().unwrap();
1275 channel_state.by_id.insert(funding_msg.channel_id, chan);
1279 fn handle_funding_signed(&self, their_node_id: &PublicKey, msg: &msgs::FundingSigned) -> Result<(), HandleError> {
1280 let (funding_txo, user_id, monitor) = {
1281 let mut channel_state = self.channel_state.lock().unwrap();
1282 match channel_state.by_id.get_mut(&msg.channel_id) {
1284 if chan.get_their_node_id() != *their_node_id {
1285 return Err(HandleError{err: "Got a message for a channel from the wrong node!", action: None})
1287 let chan_monitor = chan.funding_signed(&msg)?;
1288 (chan.get_funding_txo().unwrap(), chan.get_user_id(), chan_monitor)
1290 None => return Err(HandleError{err: "Failed to find corresponding channel", action: None})
1293 if let Err(_e) = self.monitor.add_update_monitor(monitor.get_funding_txo().unwrap(), monitor) {
1296 let mut pending_events = self.pending_events.lock().unwrap();
1297 pending_events.push(events::Event::FundingBroadcastSafe {
1298 funding_txo: funding_txo,
1299 user_channel_id: user_id,
1304 fn handle_funding_locked(&self, their_node_id: &PublicKey, msg: &msgs::FundingLocked) -> Result<Option<msgs::AnnouncementSignatures>, HandleError> {
1305 let mut channel_state = self.channel_state.lock().unwrap();
1306 match channel_state.by_id.get_mut(&msg.channel_id) {
1308 if chan.get_their_node_id() != *their_node_id {
1309 return Err(HandleError{err: "Got a message for a channel from the wrong node!", action: None})
1311 chan.funding_locked(&msg)?;
1312 return Ok(self.get_announcement_sigs(chan)?);
1314 None => return Err(HandleError{err: "Failed to find corresponding channel", action: None})
1318 fn handle_shutdown(&self, their_node_id: &PublicKey, msg: &msgs::Shutdown) -> Result<(Option<msgs::Shutdown>, Option<msgs::ClosingSigned>), HandleError> {
1319 let (res, chan_option) = {
1320 let mut channel_state_lock = self.channel_state.lock().unwrap();
1321 let channel_state = channel_state_lock.borrow_parts();
1323 match channel_state.by_id.entry(msg.channel_id.clone()) {
1324 hash_map::Entry::Occupied(mut chan_entry) => {
1325 if chan_entry.get().get_their_node_id() != *their_node_id {
1326 return Err(HandleError{err: "Got a message for a channel from the wrong node!", action: None})
1328 let res = chan_entry.get_mut().shutdown(&*self.fee_estimator, &msg)?;
1329 if chan_entry.get().is_shutdown() {
1330 if let Some(short_id) = chan_entry.get().get_short_channel_id() {
1331 channel_state.short_to_id.remove(&short_id);
1333 (res, Some(chan_entry.remove_entry().1))
1334 } else { (res, None) }
1336 hash_map::Entry::Vacant(_) => return Err(HandleError{err: "Failed to find corresponding channel", action: None})
1339 for payment_hash in res.2 {
1340 // unknown_next_peer...I dunno who that is anymore....
1341 self.fail_htlc_backwards_internal(self.channel_state.lock().unwrap(), &payment_hash, HTLCFailReason::Reason { failure_code: 0x4000 | 10, data: Vec::new() });
1343 if let Some(chan) = chan_option {
1344 if let Ok(update) = self.get_channel_update(&chan) {
1345 let mut events = self.pending_events.lock().unwrap();
1346 events.push(events::Event::BroadcastChannelUpdate {
1354 fn handle_closing_signed(&self, their_node_id: &PublicKey, msg: &msgs::ClosingSigned) -> Result<Option<msgs::ClosingSigned>, HandleError> {
1355 let (res, chan_option) = {
1356 let mut channel_state_lock = self.channel_state.lock().unwrap();
1357 let channel_state = channel_state_lock.borrow_parts();
1358 match channel_state.by_id.entry(msg.channel_id.clone()) {
1359 hash_map::Entry::Occupied(mut chan_entry) => {
1360 if chan_entry.get().get_their_node_id() != *their_node_id {
1361 return Err(HandleError{err: "Got a message for a channel from the wrong node!", action: None})
1363 let res = chan_entry.get_mut().closing_signed(&*self.fee_estimator, &msg)?;
1364 if res.1.is_some() {
1365 // We're done with this channel, we've got a signed closing transaction and
1366 // will send the closing_signed back to the remote peer upon return. This
1367 // also implies there are no pending HTLCs left on the channel, so we can
1368 // fully delete it from tracking (the channel monitor is still around to
1369 // watch for old state broadcasts)!
1370 if let Some(short_id) = chan_entry.get().get_short_channel_id() {
1371 channel_state.short_to_id.remove(&short_id);
1373 (res, Some(chan_entry.remove_entry().1))
1374 } else { (res, None) }
1376 hash_map::Entry::Vacant(_) => return Err(HandleError{err: "Failed to find corresponding channel", action: None})
1379 if let Some(broadcast_tx) = res.1 {
1380 self.tx_broadcaster.broadcast_transaction(&broadcast_tx);
1382 if let Some(chan) = chan_option {
1383 if let Ok(update) = self.get_channel_update(&chan) {
1384 let mut events = self.pending_events.lock().unwrap();
1385 events.push(events::Event::BroadcastChannelUpdate {
1393 fn handle_update_add_htlc(&self, their_node_id: &PublicKey, msg: &msgs::UpdateAddHTLC) -> Result<(), msgs::HandleError> {
1394 //TODO: BOLT 4 points out a specific attack where a peer may re-send an onion packet and
1395 //determine the state of the payment based on our response/if we forward anything/the time
1396 //we take to respond. We should take care to avoid allowing such an attack.
1398 //TODO: There exists a further attack where a node may garble the onion data, forward it to
1399 //us repeatedly garbled in different ways, and compare our error messages, which are
1400 //encrypted with the same key. Its not immediately obvious how to usefully exploit that,
1401 //but we should prevent it anyway.
1403 let shared_secret = SharedSecret::new(&self.secp_ctx, &msg.onion_routing_packet.public_key, &self.our_network_key);
1404 let (rho, mu) = ChannelManager::gen_rho_mu_from_shared_secret(&shared_secret);
1406 macro_rules! get_onion_hash {
1409 let mut sha = Sha256::new();
1410 sha.input(&msg.onion_routing_packet.hop_data);
1411 let mut onion_hash = [0; 32];
1412 sha.result(&mut onion_hash);
1418 macro_rules! return_err {
1419 ($msg: expr, $err_code: expr, $data: expr) => {
1420 return Err(msgs::HandleError {
1422 action: Some(msgs::ErrorAction::UpdateFailHTLC {
1423 msg: msgs::UpdateFailHTLC {
1424 channel_id: msg.channel_id,
1425 htlc_id: msg.htlc_id,
1426 reason: ChannelManager::build_first_hop_failure_packet(&shared_secret, $err_code, $data),
1433 if msg.onion_routing_packet.version != 0 {
1434 //TODO: Spec doesn't indicate if we should only hash hop_data here (and in other
1435 //sha256_of_onion error data packets), or the entire onion_routing_packet. Either way,
1436 //the hash doesn't really serve any purpuse - in the case of hashing all data, the
1437 //receiving node would have to brute force to figure out which version was put in the
1438 //packet by the node that send us the message, in the case of hashing the hop_data, the
1439 //node knows the HMAC matched, so they already know what is there...
1440 return_err!("Unknown onion packet version", 0x8000 | 0x4000 | 4, &get_onion_hash!());
1443 let mut hmac = Hmac::new(Sha256::new(), &mu);
1444 hmac.input(&msg.onion_routing_packet.hop_data);
1445 hmac.input(&msg.payment_hash);
1446 if hmac.result() != MacResult::new(&msg.onion_routing_packet.hmac) {
1447 return_err!("HMAC Check failed", 0x8000 | 0x4000 | 5, &get_onion_hash!());
1450 let mut chacha = ChaCha20::new(&rho, &[0u8; 8]);
1451 let next_hop_data = {
1452 let mut decoded = [0; 65];
1453 chacha.process(&msg.onion_routing_packet.hop_data[0..65], &mut decoded);
1454 match msgs::OnionHopData::decode(&decoded[..]) {
1456 let error_code = match err {
1457 msgs::DecodeError::UnknownRealmByte => 0x4000 | 1,
1458 _ => 0x2000 | 2, // Should never happen
1460 return_err!("Unable to decode our hop data", error_code, &[0;0]);
1466 //TODO: Check that msg.cltv_expiry is within acceptable bounds!
1468 let mut pending_forward_info = if next_hop_data.hmac == [0; 32] {
1470 if next_hop_data.data.amt_to_forward != msg.amount_msat {
1471 return_err!("Upstream node sent less than we were supposed to receive in payment", 19, &byte_utils::be64_to_array(msg.amount_msat));
1473 if next_hop_data.data.outgoing_cltv_value != msg.cltv_expiry {
1474 return_err!("Upstream node set CLTV to the wrong value", 18, &byte_utils::be32_to_array(msg.cltv_expiry));
1477 // Note that we could obviously respond immediately with an update_fulfill_htlc
1478 // message, however that would leak that we are the recipient of this payment, so
1479 // instead we stay symmetric with the forwarding case, only responding (after a
1480 // delay) once they've send us a commitment_signed!
1482 PendingForwardHTLCInfo {
1484 payment_hash: msg.payment_hash.clone(),
1485 short_channel_id: 0,
1486 prev_short_channel_id: 0,
1487 amt_to_forward: next_hop_data.data.amt_to_forward,
1488 outgoing_cltv_value: next_hop_data.data.outgoing_cltv_value,
1491 let mut new_packet_data = [0; 20*65];
1492 chacha.process(&msg.onion_routing_packet.hop_data[65..], &mut new_packet_data[0..19*65]);
1493 chacha.process(&ChannelManager::ZERO[0..65], &mut new_packet_data[19*65..]);
1495 let mut new_pubkey = msg.onion_routing_packet.public_key.clone();
1497 let blinding_factor = {
1498 let mut sha = Sha256::new();
1499 sha.input(&new_pubkey.serialize()[..]);
1500 sha.input(&shared_secret[..]);
1501 let mut res = [0u8; 32];
1502 sha.result(&mut res);
1503 match SecretKey::from_slice(&self.secp_ctx, &res) {
1505 // Return temporary node failure as its technically our issue, not the
1507 return_err!("Blinding factor is an invalid private key", 0x2000 | 2, &[0;0]);
1513 match new_pubkey.mul_assign(&self.secp_ctx, &blinding_factor) {
1515 // Return temporary node failure as its technically our issue, not the
1517 return_err!("New blinding factor is an invalid private key", 0x2000 | 2, &[0;0]);
1522 let outgoing_packet = msgs::OnionPacket {
1524 public_key: new_pubkey,
1525 hop_data: new_packet_data,
1526 hmac: next_hop_data.hmac.clone(),
1529 //TODO: Check amt_to_forward and outgoing_cltv_value are within acceptable ranges!
1531 PendingForwardHTLCInfo {
1532 onion_packet: Some(outgoing_packet),
1533 payment_hash: msg.payment_hash.clone(),
1534 short_channel_id: next_hop_data.data.short_channel_id,
1535 prev_short_channel_id: 0,
1536 amt_to_forward: next_hop_data.data.amt_to_forward,
1537 outgoing_cltv_value: next_hop_data.data.outgoing_cltv_value,
1541 let mut channel_state_lock = self.channel_state.lock().unwrap();
1542 let channel_state = channel_state_lock.borrow_parts();
1544 if pending_forward_info.onion_packet.is_some() { // If short_channel_id is 0 here, we'll reject them in the body here
1545 let forwarding_id = match channel_state.short_to_id.get(&pending_forward_info.short_channel_id) {
1547 return_err!("Don't have available channel for forwarding as requested.", 0x4000 | 10, &[0;0]);
1549 Some(id) => id.clone(),
1551 let chan = channel_state.by_id.get_mut(&forwarding_id).unwrap();
1552 if !chan.is_live() {
1553 let chan_update = self.get_channel_update(chan).unwrap();
1554 return_err!("Forwarding channel is not in a ready state.", 0x1000 | 7, &chan_update.encode_with_len()[..]);
1558 let claimable_htlcs_entry = channel_state.claimable_htlcs.entry(msg.payment_hash.clone());
1560 // We dont correctly handle payments that route through us twice on their way to their
1561 // destination. That's OK since those nodes are probably busted or trying to do network
1562 // mapping through repeated loops. In either case, we want them to stop talking to us, so
1563 // we send permanent_node_failure.
1564 match &claimable_htlcs_entry {
1565 &hash_map::Entry::Occupied(ref e) => {
1566 let mut acceptable_cycle = false;
1568 &PendingOutboundHTLC::OutboundRoute { .. } => {
1569 acceptable_cycle = pending_forward_info.short_channel_id == 0;
1573 if !acceptable_cycle {
1574 return_err!("Payment looped through us twice", 0x4000 | 0x2000 | 2, &[0;0]);
1580 let (source_short_channel_id, res) = match channel_state.by_id.get_mut(&msg.channel_id) {
1582 if chan.get_their_node_id() != *their_node_id {
1583 return Err(HandleError{err: "Got a message for a channel from the wrong node!", action: None})
1585 if !chan.is_usable() {
1586 return Err(HandleError{err: "Channel not yet available for receiving HTLCs", action: None});
1588 let short_channel_id = chan.get_short_channel_id().unwrap();
1589 pending_forward_info.prev_short_channel_id = short_channel_id;
1590 (short_channel_id, chan.update_add_htlc(&msg, pending_forward_info)?)
1592 None => return Err(HandleError{err: "Failed to find corresponding channel", action: None}),
1595 match claimable_htlcs_entry {
1596 hash_map::Entry::Occupied(mut e) => {
1597 let outbound_route = e.get_mut();
1598 let (route, session_priv) = match outbound_route {
1599 &mut PendingOutboundHTLC::OutboundRoute { ref route, ref session_priv } => {
1600 (route.clone(), session_priv.clone())
1602 _ => unreachable!(),
1604 *outbound_route = PendingOutboundHTLC::CycledRoute {
1605 source_short_channel_id,
1606 incoming_packet_shared_secret: shared_secret,
1611 hash_map::Entry::Vacant(e) => {
1612 e.insert(PendingOutboundHTLC::IntermediaryHopData {
1613 source_short_channel_id,
1614 incoming_packet_shared_secret: shared_secret,
1622 fn handle_update_fulfill_htlc(&self, their_node_id: &PublicKey, msg: &msgs::UpdateFulfillHTLC) -> Result<(), HandleError> {
1623 //TODO: Delay the claimed_funds relaying just like we do outbound relay!
1624 // Claim funds first, cause we don't really care if the channel we received the message on
1625 // is broken, we may have enough info to get our own money!
1626 self.claim_funds_internal(msg.payment_preimage.clone(), false);
1629 let mut channel_state = self.channel_state.lock().unwrap();
1630 match channel_state.by_id.get_mut(&msg.channel_id) {
1632 if chan.get_their_node_id() != *their_node_id {
1633 return Err(HandleError{err: "Got a message for a channel from the wrong node!", action: None})
1635 chan.update_fulfill_htlc(&msg)?
1637 None => return Err(HandleError{err: "Failed to find corresponding channel", action: None})
1640 if let Err(_e) = self.monitor.add_update_monitor(monitor.get_funding_txo().unwrap(), monitor) {
1646 fn handle_update_fail_htlc(&self, their_node_id: &PublicKey, msg: &msgs::UpdateFailHTLC) -> Result<Option<msgs::HTLCFailChannelUpdate>, HandleError> {
1647 let mut channel_state = self.channel_state.lock().unwrap();
1648 let payment_hash = match channel_state.by_id.get_mut(&msg.channel_id) {
1650 if chan.get_their_node_id() != *their_node_id {
1651 return Err(HandleError{err: "Got a message for a channel from the wrong node!", action: None})
1653 chan.update_fail_htlc(&msg, HTLCFailReason::ErrorPacket { err: msg.reason.clone() })
1655 None => return Err(HandleError{err: "Failed to find corresponding channel", action: None})
1658 if let Some(pending_htlc) = channel_state.claimable_htlcs.get(&payment_hash) {
1659 match pending_htlc {
1660 &PendingOutboundHTLC::OutboundRoute { ref route, ref session_priv } => {
1661 // Handle packed channel/node updates for passing back for the route handler
1662 let mut packet_decrypted = msg.reason.data.clone();
1664 Self::construct_onion_keys_callback(&self.secp_ctx, &route, &session_priv, |shared_secret, _, _, route_hop| {
1665 if res.is_some() { return; }
1667 let ammag = ChannelManager::gen_ammag_from_shared_secret(&shared_secret);
1669 let mut decryption_tmp = Vec::with_capacity(packet_decrypted.len());
1670 decryption_tmp.resize(packet_decrypted.len(), 0);
1671 let mut chacha = ChaCha20::new(&ammag, &[0u8; 8]);
1672 chacha.process(&packet_decrypted, &mut decryption_tmp[..]);
1673 packet_decrypted = decryption_tmp;
1675 if let Ok(err_packet) = msgs::DecodedOnionErrorPacket::decode(&packet_decrypted) {
1676 if err_packet.failuremsg.len() >= 2 {
1677 let um = ChannelManager::gen_um_from_shared_secret(&shared_secret);
1679 let mut hmac = Hmac::new(Sha256::new(), &um);
1680 hmac.input(&err_packet.encode()[32..]);
1681 let mut calc_tag = [0u8; 32];
1682 hmac.raw_result(&mut calc_tag);
1683 if crypto::util::fixed_time_eq(&calc_tag, &err_packet.hmac) {
1684 const UNKNOWN_CHAN: u16 = 0x4000|10;
1685 const TEMP_CHAN_FAILURE: u16 = 0x4000|7;
1686 match byte_utils::slice_to_be16(&err_packet.failuremsg[0..2]) {
1687 TEMP_CHAN_FAILURE => {
1688 if err_packet.failuremsg.len() >= 4 {
1689 let update_len = byte_utils::slice_to_be16(&err_packet.failuremsg[2..4]) as usize;
1690 if err_packet.failuremsg.len() >= 4 + update_len {
1691 if let Ok(chan_update) = msgs::ChannelUpdate::decode(&err_packet.failuremsg[4..4 + update_len]) {
1692 res = Some(msgs::HTLCFailChannelUpdate::ChannelUpdateMessage {
1700 // No such next-hop. We know this came from the
1701 // current node as the HMAC validated.
1702 res = Some(msgs::HTLCFailChannelUpdate::ChannelClosed {
1703 short_channel_id: route_hop.short_channel_id
1706 _ => {}, //TODO: Enumerate all of these!
1721 fn handle_update_fail_malformed_htlc(&self, their_node_id: &PublicKey, msg: &msgs::UpdateFailMalformedHTLC) -> Result<(), HandleError> {
1722 let mut channel_state = self.channel_state.lock().unwrap();
1723 match channel_state.by_id.get_mut(&msg.channel_id) {
1725 if chan.get_their_node_id() != *their_node_id {
1726 return Err(HandleError{err: "Got a message for a channel from the wrong node!", action: None})
1728 chan.update_fail_malformed_htlc(&msg, HTLCFailReason::Reason { failure_code: msg.failure_code, data: Vec::new() })
1730 None => return Err(HandleError{err: "Failed to find corresponding channel", action: None})
1734 fn handle_commitment_signed(&self, their_node_id: &PublicKey, msg: &msgs::CommitmentSigned) -> Result<(msgs::RevokeAndACK, Option<msgs::CommitmentSigned>), HandleError> {
1735 let (revoke_and_ack, commitment_signed, chan_monitor) = {
1736 let mut channel_state = self.channel_state.lock().unwrap();
1737 match channel_state.by_id.get_mut(&msg.channel_id) {
1739 if chan.get_their_node_id() != *their_node_id {
1740 return Err(HandleError{err: "Got a message for a channel from the wrong node!", action: None})
1742 chan.commitment_signed(&msg)?
1744 None => return Err(HandleError{err: "Failed to find corresponding channel", action: None})
1747 if let Err(_e) = self.monitor.add_update_monitor(chan_monitor.get_funding_txo().unwrap(), chan_monitor) {
1751 Ok((revoke_and_ack, commitment_signed))
1754 fn handle_revoke_and_ack(&self, their_node_id: &PublicKey, msg: &msgs::RevokeAndACK) -> Result<Option<msgs::CommitmentUpdate>, HandleError> {
1755 let (res, mut pending_forwards, mut pending_failures, chan_monitor) = {
1756 let mut channel_state = self.channel_state.lock().unwrap();
1757 match channel_state.by_id.get_mut(&msg.channel_id) {
1759 if chan.get_their_node_id() != *their_node_id {
1760 return Err(HandleError{err: "Got a message for a channel from the wrong node!", action: None})
1762 chan.revoke_and_ack(&msg)?
1764 None => return Err(HandleError{err: "Failed to find corresponding channel", action: None})
1767 if let Err(_e) = self.monitor.add_update_monitor(chan_monitor.get_funding_txo().unwrap(), chan_monitor) {
1770 for failure in pending_failures.drain(..) {
1771 self.fail_htlc_backwards_internal(self.channel_state.lock().unwrap(), &failure.0, failure.1);
1774 let mut forward_event = None;
1775 if !pending_forwards.is_empty() {
1776 let mut channel_state = self.channel_state.lock().unwrap();
1777 if channel_state.forward_htlcs.is_empty() {
1778 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));
1779 channel_state.next_forward = forward_event.unwrap();
1781 for forward_info in pending_forwards.drain(..) {
1782 match channel_state.forward_htlcs.entry(forward_info.short_channel_id) {
1783 hash_map::Entry::Occupied(mut entry) => {
1784 entry.get_mut().push(forward_info);
1786 hash_map::Entry::Vacant(entry) => {
1787 entry.insert(vec!(forward_info));
1792 match forward_event {
1794 let mut pending_events = self.pending_events.lock().unwrap();
1795 pending_events.push(events::Event::PendingHTLCsForwardable {
1796 time_forwardable: time
1805 fn handle_update_fee(&self, their_node_id: &PublicKey, msg: &msgs::UpdateFee) -> Result<(), HandleError> {
1806 let mut channel_state = self.channel_state.lock().unwrap();
1807 match channel_state.by_id.get_mut(&msg.channel_id) {
1809 if chan.get_their_node_id() != *their_node_id {
1810 return Err(HandleError{err: "Got a message for a channel from the wrong node!", action: None})
1812 chan.update_fee(&*self.fee_estimator, &msg)
1814 None => return Err(HandleError{err: "Failed to find corresponding channel", action: None})
1818 fn handle_announcement_signatures(&self, their_node_id: &PublicKey, msg: &msgs::AnnouncementSignatures) -> Result<(), HandleError> {
1819 let (chan_announcement, chan_update) = {
1820 let mut channel_state = self.channel_state.lock().unwrap();
1821 match channel_state.by_id.get_mut(&msg.channel_id) {
1823 if chan.get_their_node_id() != *their_node_id {
1824 return Err(HandleError{err: "Got a message for a channel from the wrong node!", action: None})
1826 if !chan.is_usable() {
1827 return Err(HandleError{err: "Got an announcement_signatures before we were ready for it", action: None });
1830 let our_node_id = self.get_our_node_id();
1831 let (announcement, our_bitcoin_sig) = chan.get_channel_announcement(our_node_id.clone(), self.genesis_hash.clone())?;
1833 let were_node_one = announcement.node_id_1 == our_node_id;
1834 let msghash = Message::from_slice(&Sha256dHash::from_data(&announcement.encode()[..])[..]).unwrap();
1835 secp_call!(self.secp_ctx.verify(&msghash, &msg.node_signature, if were_node_one { &announcement.node_id_2 } else { &announcement.node_id_1 }));
1836 secp_call!(self.secp_ctx.verify(&msghash, &msg.bitcoin_signature, if were_node_one { &announcement.bitcoin_key_2 } else { &announcement.bitcoin_key_1 }));
1838 let our_node_sig = secp_call!(self.secp_ctx.sign(&msghash, &self.our_network_key));
1840 (msgs::ChannelAnnouncement {
1841 node_signature_1: if were_node_one { our_node_sig } else { msg.node_signature },
1842 node_signature_2: if were_node_one { msg.node_signature } else { our_node_sig },
1843 bitcoin_signature_1: if were_node_one { our_bitcoin_sig } else { msg.bitcoin_signature },
1844 bitcoin_signature_2: if were_node_one { msg.bitcoin_signature } else { our_bitcoin_sig },
1845 contents: announcement,
1846 }, self.get_channel_update(chan).unwrap()) // can only fail if we're not in a ready state
1848 None => return Err(HandleError{err: "Failed to find corresponding channel", action: None})
1851 let mut pending_events = self.pending_events.lock().unwrap();
1852 pending_events.push(events::Event::BroadcastChannelAnnouncement { msg: chan_announcement, update_msg: chan_update });
1856 fn peer_disconnected(&self, their_node_id: &PublicKey, no_connection_possible: bool) {
1857 let mut new_events = Vec::new();
1859 let mut channel_state_lock = self.channel_state.lock().unwrap();
1860 let channel_state = channel_state_lock.borrow_parts();
1861 let short_to_id = channel_state.short_to_id;
1862 if no_connection_possible {
1863 channel_state.by_id.retain(|_, chan| {
1864 if chan.get_their_node_id() == *their_node_id {
1865 if let Some(short_id) = chan.get_short_channel_id() {
1866 short_to_id.remove(&short_id);
1868 let txn_to_broadcast = chan.force_shutdown();
1869 for tx in txn_to_broadcast {
1870 self.tx_broadcaster.broadcast_transaction(&tx);
1872 if let Ok(update) = self.get_channel_update(&chan) {
1873 new_events.push(events::Event::BroadcastChannelUpdate {
1883 for chan in channel_state.by_id {
1884 if chan.1.get_their_node_id() == *their_node_id {
1885 //TODO: mark channel disabled (and maybe announce such after a timeout). Also
1886 //fail and wipe any uncommitted outbound HTLCs as those are considered after
1892 if !new_events.is_empty() {
1893 let mut pending_events = self.pending_events.lock().unwrap();
1894 for event in new_events.drain(..) {
1895 pending_events.push(event);
1903 use chain::chaininterface;
1904 use chain::transaction::OutPoint;
1905 use chain::chaininterface::ChainListener;
1906 use ln::channelmanager::{ChannelManager,OnionKeys};
1907 use ln::router::{Route, RouteHop, Router};
1909 use ln::msgs::{MsgEncodable,ChannelMessageHandler,RoutingMessageHandler};
1910 use util::test_utils;
1911 use util::events::{Event, EventsProvider};
1913 use bitcoin::util::hash::Sha256dHash;
1914 use bitcoin::blockdata::block::{Block, BlockHeader};
1915 use bitcoin::blockdata::transaction::{Transaction, TxOut};
1916 use bitcoin::network::constants::Network;
1917 use bitcoin::network::serialize::serialize;
1918 use bitcoin::network::serialize::BitcoinHash;
1922 use secp256k1::Secp256k1;
1923 use secp256k1::key::{PublicKey,SecretKey};
1925 use crypto::sha2::Sha256;
1926 use crypto::digest::Digest;
1928 use rand::{thread_rng,Rng};
1930 use std::collections::HashMap;
1931 use std::default::Default;
1932 use std::sync::{Arc, Mutex};
1933 use std::time::Instant;
1936 fn build_test_onion_keys() -> Vec<OnionKeys> {
1937 // Keys from BOLT 4, used in both test vector tests
1938 let secp_ctx = Secp256k1::new();
1943 pubkey: PublicKey::from_slice(&secp_ctx, &hex::decode("02eec7245d6b7d2ccb30380bfbe2a3648cd7a942653f5aa340edcea1f283686619").unwrap()[..]).unwrap(),
1944 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
1947 pubkey: PublicKey::from_slice(&secp_ctx, &hex::decode("0324653eac434488002cc06bbfb7f10fe18991e35f9fe4302dbea6d2353dc0ab1c").unwrap()[..]).unwrap(),
1948 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
1951 pubkey: PublicKey::from_slice(&secp_ctx, &hex::decode("027f31ebc5462c1fdce1b737ecff52d37d75dea43ce11c74d25aa297165faa2007").unwrap()[..]).unwrap(),
1952 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
1955 pubkey: PublicKey::from_slice(&secp_ctx, &hex::decode("032c0b7cf95324a07d05398b240174dc0c2be444d96b159aa6c7f7b1e668680991").unwrap()[..]).unwrap(),
1956 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
1959 pubkey: PublicKey::from_slice(&secp_ctx, &hex::decode("02edabbd16b41c8371b92ef2f04c1185b4f03b6dcd52ba9b78d9d7c89c8f221145").unwrap()[..]).unwrap(),
1960 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
1965 let session_priv = SecretKey::from_slice(&secp_ctx, &hex::decode("4141414141414141414141414141414141414141414141414141414141414141").unwrap()[..]).unwrap();
1967 let onion_keys = ChannelManager::construct_onion_keys(&secp_ctx, &route, &session_priv).unwrap();
1968 assert_eq!(onion_keys.len(), route.hops.len());
1973 fn onion_vectors() {
1974 // Packet creation test vectors from BOLT 4
1975 let onion_keys = build_test_onion_keys();
1977 assert_eq!(onion_keys[0].shared_secret[..], hex::decode("53eb63ea8a3fec3b3cd433b85cd62a4b145e1dda09391b348c4e1cd36a03ea66").unwrap()[..]);
1978 assert_eq!(onion_keys[0].blinding_factor[..], hex::decode("2ec2e5da605776054187180343287683aa6a51b4b1c04d6dd49c45d8cffb3c36").unwrap()[..]);
1979 assert_eq!(onion_keys[0].ephemeral_pubkey.serialize()[..], hex::decode("02eec7245d6b7d2ccb30380bfbe2a3648cd7a942653f5aa340edcea1f283686619").unwrap()[..]);
1980 assert_eq!(onion_keys[0].rho, hex::decode("ce496ec94def95aadd4bec15cdb41a740c9f2b62347c4917325fcc6fb0453986").unwrap()[..]);
1981 assert_eq!(onion_keys[0].mu, hex::decode("b57061dc6d0a2b9f261ac410c8b26d64ac5506cbba30267a649c28c179400eba").unwrap()[..]);
1983 assert_eq!(onion_keys[1].shared_secret[..], hex::decode("a6519e98832a0b179f62123b3567c106db99ee37bef036e783263602f3488fae").unwrap()[..]);
1984 assert_eq!(onion_keys[1].blinding_factor[..], hex::decode("bf66c28bc22e598cfd574a1931a2bafbca09163df2261e6d0056b2610dab938f").unwrap()[..]);
1985 assert_eq!(onion_keys[1].ephemeral_pubkey.serialize()[..], hex::decode("028f9438bfbf7feac2e108d677e3a82da596be706cc1cf342b75c7b7e22bf4e6e2").unwrap()[..]);
1986 assert_eq!(onion_keys[1].rho, hex::decode("450ffcabc6449094918ebe13d4f03e433d20a3d28a768203337bc40b6e4b2c59").unwrap()[..]);
1987 assert_eq!(onion_keys[1].mu, hex::decode("05ed2b4a3fb023c2ff5dd6ed4b9b6ea7383f5cfe9d59c11d121ec2c81ca2eea9").unwrap()[..]);
1989 assert_eq!(onion_keys[2].shared_secret[..], hex::decode("3a6b412548762f0dbccce5c7ae7bb8147d1caf9b5471c34120b30bc9c04891cc").unwrap()[..]);
1990 assert_eq!(onion_keys[2].blinding_factor[..], hex::decode("a1f2dadd184eb1627049673f18c6325814384facdee5bfd935d9cb031a1698a5").unwrap()[..]);
1991 assert_eq!(onion_keys[2].ephemeral_pubkey.serialize()[..], hex::decode("03bfd8225241ea71cd0843db7709f4c222f62ff2d4516fd38b39914ab6b83e0da0").unwrap()[..]);
1992 assert_eq!(onion_keys[2].rho, hex::decode("11bf5c4f960239cb37833936aa3d02cea82c0f39fd35f566109c41f9eac8deea").unwrap()[..]);
1993 assert_eq!(onion_keys[2].mu, hex::decode("caafe2820fa00eb2eeb78695ae452eba38f5a53ed6d53518c5c6edf76f3f5b78").unwrap()[..]);
1995 assert_eq!(onion_keys[3].shared_secret[..], hex::decode("21e13c2d7cfe7e18836df50872466117a295783ab8aab0e7ecc8c725503ad02d").unwrap()[..]);
1996 assert_eq!(onion_keys[3].blinding_factor[..], hex::decode("7cfe0b699f35525029ae0fa437c69d0f20f7ed4e3916133f9cacbb13c82ff262").unwrap()[..]);
1997 assert_eq!(onion_keys[3].ephemeral_pubkey.serialize()[..], hex::decode("031dde6926381289671300239ea8e57ffaf9bebd05b9a5b95beaf07af05cd43595").unwrap()[..]);
1998 assert_eq!(onion_keys[3].rho, hex::decode("cbe784ab745c13ff5cffc2fbe3e84424aa0fd669b8ead4ee562901a4a4e89e9e").unwrap()[..]);
1999 assert_eq!(onion_keys[3].mu, hex::decode("5052aa1b3d9f0655a0932e50d42f0c9ba0705142c25d225515c45f47c0036ee9").unwrap()[..]);
2001 assert_eq!(onion_keys[4].shared_secret[..], hex::decode("b5756b9b542727dbafc6765a49488b023a725d631af688fc031217e90770c328").unwrap()[..]);
2002 assert_eq!(onion_keys[4].blinding_factor[..], hex::decode("c96e00dddaf57e7edcd4fb5954be5b65b09f17cb6d20651b4e90315be5779205").unwrap()[..]);
2003 assert_eq!(onion_keys[4].ephemeral_pubkey.serialize()[..], hex::decode("03a214ebd875aab6ddfd77f22c5e7311d7f77f17a169e599f157bbcdae8bf071f4").unwrap()[..]);
2004 assert_eq!(onion_keys[4].rho, hex::decode("034e18b8cc718e8af6339106e706c52d8df89e2b1f7e9142d996acf88df8799b").unwrap()[..]);
2005 assert_eq!(onion_keys[4].mu, hex::decode("8e45e5c61c2b24cb6382444db6698727afb063adecd72aada233d4bf273d975a").unwrap()[..]);
2007 // Test vectors below are flat-out wrong: they claim to set outgoing_cltv_value to non-0 :/
2008 let payloads = vec!(
2009 msgs::OnionHopData {
2011 data: msgs::OnionRealm0HopData {
2012 short_channel_id: 0,
2014 outgoing_cltv_value: 0,
2018 msgs::OnionHopData {
2020 data: msgs::OnionRealm0HopData {
2021 short_channel_id: 0x0101010101010101,
2022 amt_to_forward: 0x0100000001,
2023 outgoing_cltv_value: 0,
2027 msgs::OnionHopData {
2029 data: msgs::OnionRealm0HopData {
2030 short_channel_id: 0x0202020202020202,
2031 amt_to_forward: 0x0200000002,
2032 outgoing_cltv_value: 0,
2036 msgs::OnionHopData {
2038 data: msgs::OnionRealm0HopData {
2039 short_channel_id: 0x0303030303030303,
2040 amt_to_forward: 0x0300000003,
2041 outgoing_cltv_value: 0,
2045 msgs::OnionHopData {
2047 data: msgs::OnionRealm0HopData {
2048 short_channel_id: 0x0404040404040404,
2049 amt_to_forward: 0x0400000004,
2050 outgoing_cltv_value: 0,
2056 let packet = ChannelManager::construct_onion_packet(payloads, onion_keys, &[0x42; 32]).unwrap();
2057 // Just check the final packet encoding, as it includes all the per-hop vectors in it
2059 assert_eq!(packet.encode(), hex::decode("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").unwrap());
2063 fn test_failure_packet_onion() {
2064 // Returning Errors test vectors from BOLT 4
2066 let onion_keys = build_test_onion_keys();
2067 let onion_error = ChannelManager::build_failure_packet(&onion_keys[4].shared_secret, 0x2002, &[0; 0]);
2068 assert_eq!(onion_error.encode(), hex::decode("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").unwrap());
2070 let onion_packet_1 = ChannelManager::encrypt_failure_packet(&onion_keys[4].shared_secret, &onion_error.encode()[..]);
2071 assert_eq!(onion_packet_1.data, hex::decode("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").unwrap());
2073 let onion_packet_2 = ChannelManager::encrypt_failure_packet(&onion_keys[3].shared_secret, &onion_packet_1.data[..]);
2074 assert_eq!(onion_packet_2.data, hex::decode("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").unwrap());
2076 let onion_packet_3 = ChannelManager::encrypt_failure_packet(&onion_keys[2].shared_secret, &onion_packet_2.data[..]);
2077 assert_eq!(onion_packet_3.data, hex::decode("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").unwrap());
2079 let onion_packet_4 = ChannelManager::encrypt_failure_packet(&onion_keys[1].shared_secret, &onion_packet_3.data[..]);
2080 assert_eq!(onion_packet_4.data, hex::decode("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").unwrap());
2082 let onion_packet_5 = ChannelManager::encrypt_failure_packet(&onion_keys[0].shared_secret, &onion_packet_4.data[..]);
2083 assert_eq!(onion_packet_5.data, hex::decode("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").unwrap());
2086 fn confirm_transaction(chain: &chaininterface::ChainWatchInterfaceUtil, tx: &Transaction, chan_id: u32) {
2087 assert!(chain.does_match_tx(tx));
2088 let mut header = BlockHeader { version: 0x20000000, prev_blockhash: Default::default(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
2089 chain.block_connected_checked(&header, 1, &[tx; 1], &[chan_id; 1]);
2091 header = BlockHeader { version: 0x20000000, prev_blockhash: header.bitcoin_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
2092 chain.block_connected_checked(&header, i, &[tx; 0], &[0; 0]);
2097 feeest: Arc<test_utils::TestFeeEstimator>,
2098 chain_monitor: Arc<chaininterface::ChainWatchInterfaceUtil>,
2099 tx_broadcaster: Arc<test_utils::TestBroadcaster>,
2100 chan_monitor: Arc<test_utils::TestChannelMonitor>,
2102 node: Arc<ChannelManager>,
2106 static mut CHAN_COUNT: u32 = 0;
2107 fn create_chan_between_nodes(node_a: &Node, node_b: &Node) -> (msgs::ChannelAnnouncement, msgs::ChannelUpdate, msgs::ChannelUpdate, [u8; 32], Transaction) {
2108 node_a.node.create_channel(node_b.node.get_our_node_id(), 100000, 42).unwrap();
2110 let events_1 = node_a.node.get_and_clear_pending_events();
2111 assert_eq!(events_1.len(), 1);
2112 let accept_chan = match events_1[0] {
2113 Event::SendOpenChannel { ref node_id, ref msg } => {
2114 assert_eq!(*node_id, node_b.node.get_our_node_id());
2115 node_b.node.handle_open_channel(&node_a.node.get_our_node_id(), msg).unwrap()
2117 _ => panic!("Unexpected event"),
2120 node_a.node.handle_accept_channel(&node_b.node.get_our_node_id(), &accept_chan).unwrap();
2122 let chan_id = unsafe { CHAN_COUNT };
2126 let events_2 = node_a.node.get_and_clear_pending_events();
2127 assert_eq!(events_2.len(), 1);
2129 Event::FundingGenerationReady { ref temporary_channel_id, ref channel_value_satoshis, ref output_script, user_channel_id } => {
2130 assert_eq!(*channel_value_satoshis, 100000);
2131 assert_eq!(user_channel_id, 42);
2133 tx = Transaction { version: chan_id as u32, lock_time: 0, input: Vec::new(), output: vec![TxOut {
2134 value: *channel_value_satoshis, script_pubkey: output_script.clone(),
2136 funding_output = OutPoint::new(Sha256dHash::from_data(&serialize(&tx).unwrap()[..]), 0);
2138 node_a.node.funding_transaction_generated(&temporary_channel_id, funding_output);
2139 let mut added_monitors = node_a.chan_monitor.added_monitors.lock().unwrap();
2140 assert_eq!(added_monitors.len(), 1);
2141 assert_eq!(added_monitors[0].0, funding_output);
2142 added_monitors.clear();
2144 _ => panic!("Unexpected event"),
2147 let events_3 = node_a.node.get_and_clear_pending_events();
2148 assert_eq!(events_3.len(), 1);
2149 let funding_signed = match events_3[0] {
2150 Event::SendFundingCreated { ref node_id, ref msg } => {
2151 assert_eq!(*node_id, node_b.node.get_our_node_id());
2152 let res = node_b.node.handle_funding_created(&node_a.node.get_our_node_id(), msg).unwrap();
2153 let mut added_monitors = node_b.chan_monitor.added_monitors.lock().unwrap();
2154 assert_eq!(added_monitors.len(), 1);
2155 assert_eq!(added_monitors[0].0, funding_output);
2156 added_monitors.clear();
2159 _ => panic!("Unexpected event"),
2162 node_a.node.handle_funding_signed(&node_b.node.get_our_node_id(), &funding_signed).unwrap();
2164 let mut added_monitors = node_a.chan_monitor.added_monitors.lock().unwrap();
2165 assert_eq!(added_monitors.len(), 1);
2166 assert_eq!(added_monitors[0].0, funding_output);
2167 added_monitors.clear();
2170 let events_4 = node_a.node.get_and_clear_pending_events();
2171 assert_eq!(events_4.len(), 1);
2173 Event::FundingBroadcastSafe { ref funding_txo, user_channel_id } => {
2174 assert_eq!(user_channel_id, 42);
2175 assert_eq!(*funding_txo, funding_output);
2177 _ => panic!("Unexpected event"),
2180 confirm_transaction(&node_a.chain_monitor, &tx, chan_id);
2181 let events_5 = node_a.node.get_and_clear_pending_events();
2182 assert_eq!(events_5.len(), 1);
2184 Event::SendFundingLocked { ref node_id, ref msg, ref announcement_sigs } => {
2185 assert_eq!(*node_id, node_b.node.get_our_node_id());
2186 assert!(announcement_sigs.is_none());
2187 node_b.node.handle_funding_locked(&node_a.node.get_our_node_id(), msg).unwrap()
2189 _ => panic!("Unexpected event"),
2194 confirm_transaction(&node_b.chain_monitor, &tx, chan_id);
2195 let events_6 = node_b.node.get_and_clear_pending_events();
2196 assert_eq!(events_6.len(), 1);
2197 let as_announcement_sigs = match events_6[0] {
2198 Event::SendFundingLocked { ref node_id, ref msg, ref announcement_sigs } => {
2199 assert_eq!(*node_id, node_a.node.get_our_node_id());
2200 channel_id = msg.channel_id.clone();
2201 let as_announcement_sigs = node_a.node.handle_funding_locked(&node_b.node.get_our_node_id(), msg).unwrap().unwrap();
2202 node_a.node.handle_announcement_signatures(&node_b.node.get_our_node_id(), &(*announcement_sigs).clone().unwrap()).unwrap();
2203 as_announcement_sigs
2205 _ => panic!("Unexpected event"),
2208 let events_7 = node_a.node.get_and_clear_pending_events();
2209 assert_eq!(events_7.len(), 1);
2210 let (announcement, as_update) = match events_7[0] {
2211 Event::BroadcastChannelAnnouncement { ref msg, ref update_msg } => {
2214 _ => panic!("Unexpected event"),
2217 node_b.node.handle_announcement_signatures(&node_a.node.get_our_node_id(), &as_announcement_sigs).unwrap();
2218 let events_8 = node_b.node.get_and_clear_pending_events();
2219 assert_eq!(events_8.len(), 1);
2220 let bs_update = match events_8[0] {
2221 Event::BroadcastChannelAnnouncement { ref msg, ref update_msg } => {
2222 assert!(*announcement == *msg);
2225 _ => panic!("Unexpected event"),
2232 ((*announcement).clone(), (*as_update).clone(), (*bs_update).clone(), channel_id, tx)
2235 fn create_announced_chan_between_nodes(nodes: &Vec<Node>, a: usize, b: usize) -> (msgs::ChannelUpdate, msgs::ChannelUpdate, [u8; 32], Transaction) {
2236 let chan_announcement = create_chan_between_nodes(&nodes[a], &nodes[b]);
2238 assert!(node.router.handle_channel_announcement(&chan_announcement.0).unwrap());
2239 node.router.handle_channel_update(&chan_announcement.1).unwrap();
2240 node.router.handle_channel_update(&chan_announcement.2).unwrap();
2242 (chan_announcement.1, chan_announcement.2, chan_announcement.3, chan_announcement.4)
2245 fn close_channel(outbound_node: &Node, inbound_node: &Node, channel_id: &[u8; 32], funding_tx: Transaction, close_inbound_first: bool) -> (msgs::ChannelUpdate, msgs::ChannelUpdate) {
2246 let (node_a, broadcaster_a) = if close_inbound_first { (&inbound_node.node, &inbound_node.tx_broadcaster) } else { (&outbound_node.node, &outbound_node.tx_broadcaster) };
2247 let (node_b, broadcaster_b) = if close_inbound_first { (&outbound_node.node, &outbound_node.tx_broadcaster) } else { (&inbound_node.node, &inbound_node.tx_broadcaster) };
2250 node_a.close_channel(channel_id).unwrap();
2251 let events_1 = node_a.get_and_clear_pending_events();
2252 assert_eq!(events_1.len(), 1);
2253 let shutdown_a = match events_1[0] {
2254 Event::SendShutdown { ref node_id, ref msg } => {
2255 assert_eq!(node_id, &node_b.get_our_node_id());
2258 _ => panic!("Unexpected event"),
2261 let (shutdown_b, mut closing_signed_b) = node_b.handle_shutdown(&node_a.get_our_node_id(), &shutdown_a).unwrap();
2262 if !close_inbound_first {
2263 assert!(closing_signed_b.is_none());
2265 let (empty_a, mut closing_signed_a) = node_a.handle_shutdown(&node_b.get_our_node_id(), &shutdown_b.unwrap()).unwrap();
2266 assert!(empty_a.is_none());
2267 if close_inbound_first {
2268 assert!(closing_signed_a.is_none());
2269 closing_signed_a = node_a.handle_closing_signed(&node_b.get_our_node_id(), &closing_signed_b.unwrap()).unwrap();
2270 assert_eq!(broadcaster_a.txn_broadcasted.lock().unwrap().len(), 1);
2271 tx_a = broadcaster_a.txn_broadcasted.lock().unwrap().remove(0);
2273 let empty_b = node_b.handle_closing_signed(&node_a.get_our_node_id(), &closing_signed_a.unwrap()).unwrap();
2274 assert!(empty_b.is_none());
2275 assert_eq!(broadcaster_b.txn_broadcasted.lock().unwrap().len(), 1);
2276 tx_b = broadcaster_b.txn_broadcasted.lock().unwrap().remove(0);
2278 closing_signed_b = node_b.handle_closing_signed(&node_a.get_our_node_id(), &closing_signed_a.unwrap()).unwrap();
2279 assert_eq!(broadcaster_b.txn_broadcasted.lock().unwrap().len(), 1);
2280 tx_b = broadcaster_b.txn_broadcasted.lock().unwrap().remove(0);
2282 let empty_a2 = node_a.handle_closing_signed(&node_b.get_our_node_id(), &closing_signed_b.unwrap()).unwrap();
2283 assert!(empty_a2.is_none());
2284 assert_eq!(broadcaster_a.txn_broadcasted.lock().unwrap().len(), 1);
2285 tx_a = broadcaster_a.txn_broadcasted.lock().unwrap().remove(0);
2287 assert_eq!(tx_a, tx_b);
2288 let mut funding_tx_map = HashMap::new();
2289 funding_tx_map.insert(funding_tx.txid(), funding_tx);
2290 tx_a.verify(&funding_tx_map).unwrap();
2292 let events_2 = node_a.get_and_clear_pending_events();
2293 assert_eq!(events_2.len(), 1);
2294 let as_update = match events_2[0] {
2295 Event::BroadcastChannelUpdate { ref msg } => {
2298 _ => panic!("Unexpected event"),
2301 let events_3 = node_b.get_and_clear_pending_events();
2302 assert_eq!(events_3.len(), 1);
2303 let bs_update = match events_3[0] {
2304 Event::BroadcastChannelUpdate { ref msg } => {
2307 _ => panic!("Unexpected event"),
2310 (as_update, bs_update)
2315 msgs: Vec<msgs::UpdateAddHTLC>,
2316 commitment_msg: msgs::CommitmentSigned,
2319 fn from_event(event: Event) -> SendEvent {
2321 Event::SendHTLCs { node_id, msgs, commitment_msg } => {
2322 SendEvent { node_id: node_id, msgs: msgs, commitment_msg: commitment_msg }
2324 _ => panic!("Unexpected event type!"),
2329 static mut PAYMENT_COUNT: u8 = 0;
2330 fn send_along_route(origin_node: &Node, route: Route, expected_route: &[&Node], recv_value: u64) -> ([u8; 32], [u8; 32]) {
2331 let our_payment_preimage = unsafe { [PAYMENT_COUNT; 32] };
2332 unsafe { PAYMENT_COUNT += 1 };
2333 let our_payment_hash = {
2334 let mut sha = Sha256::new();
2335 sha.input(&our_payment_preimage[..]);
2336 let mut ret = [0; 32];
2337 sha.result(&mut ret);
2341 let mut payment_event = {
2342 origin_node.node.send_payment(route, our_payment_hash).unwrap();
2344 let mut added_monitors = origin_node.chan_monitor.added_monitors.lock().unwrap();
2345 assert_eq!(added_monitors.len(), 1);
2346 added_monitors.clear();
2349 let mut events = origin_node.node.get_and_clear_pending_events();
2350 assert_eq!(events.len(), 1);
2351 SendEvent::from_event(events.remove(0))
2353 let mut prev_node = origin_node;
2355 for (idx, &node) in expected_route.iter().enumerate() {
2356 assert_eq!(node.node.get_our_node_id(), payment_event.node_id);
2358 node.node.handle_update_add_htlc(&prev_node.node.get_our_node_id(), &payment_event.msgs[0]).unwrap();
2360 let added_monitors = node.chan_monitor.added_monitors.lock().unwrap();
2361 assert_eq!(added_monitors.len(), 0);
2364 let revoke_and_ack = node.node.handle_commitment_signed(&prev_node.node.get_our_node_id(), &payment_event.commitment_msg).unwrap();
2366 let mut added_monitors = node.chan_monitor.added_monitors.lock().unwrap();
2367 assert_eq!(added_monitors.len(), 1);
2368 added_monitors.clear();
2370 assert!(prev_node.node.handle_revoke_and_ack(&node.node.get_our_node_id(), &revoke_and_ack.0).unwrap().is_none());
2371 let prev_revoke_and_ack = prev_node.node.handle_commitment_signed(&node.node.get_our_node_id(), &revoke_and_ack.1.unwrap()).unwrap();
2373 let mut added_monitors = prev_node.chan_monitor.added_monitors.lock().unwrap();
2374 assert_eq!(added_monitors.len(), 2);
2375 added_monitors.clear();
2377 assert!(node.node.handle_revoke_and_ack(&prev_node.node.get_our_node_id(), &prev_revoke_and_ack.0).unwrap().is_none());
2378 assert!(prev_revoke_and_ack.1.is_none());
2380 let mut added_monitors = node.chan_monitor.added_monitors.lock().unwrap();
2381 assert_eq!(added_monitors.len(), 1);
2382 added_monitors.clear();
2385 let events_1 = node.node.get_and_clear_pending_events();
2386 assert_eq!(events_1.len(), 1);
2388 Event::PendingHTLCsForwardable { .. } => { },
2389 _ => panic!("Unexpected event"),
2392 node.node.channel_state.lock().unwrap().next_forward = Instant::now();
2393 node.node.process_pending_htlc_forwards();
2395 let mut events_2 = node.node.get_and_clear_pending_events();
2396 assert_eq!(events_2.len(), 1);
2397 if idx == expected_route.len() - 1 {
2399 Event::PaymentReceived { ref payment_hash, amt } => {
2400 assert_eq!(our_payment_hash, *payment_hash);
2401 assert_eq!(amt, recv_value);
2403 _ => panic!("Unexpected event"),
2407 let mut added_monitors = node.chan_monitor.added_monitors.lock().unwrap();
2408 assert_eq!(added_monitors.len(), 1);
2409 added_monitors.clear();
2411 payment_event = SendEvent::from_event(events_2.remove(0));
2412 assert_eq!(payment_event.msgs.len(), 1);
2418 (our_payment_preimage, our_payment_hash)
2421 fn claim_payment(origin_node: &Node, expected_route: &[&Node], our_payment_preimage: [u8; 32]) {
2422 assert!(expected_route.last().unwrap().node.claim_funds(our_payment_preimage));
2424 let mut added_monitors = expected_route.last().unwrap().chan_monitor.added_monitors.lock().unwrap();
2425 assert_eq!(added_monitors.len(), 1);
2426 added_monitors.clear();
2429 let mut next_msgs: Option<(msgs::UpdateFulfillHTLC, msgs::CommitmentSigned)> = None;
2430 macro_rules! update_fulfill_dance {
2431 ($node: expr, $prev_node: expr, $last_node: expr) => {
2433 $node.node.handle_update_fulfill_htlc(&$prev_node.node.get_our_node_id(), &next_msgs.as_ref().unwrap().0).unwrap();
2435 let mut added_monitors = $node.chan_monitor.added_monitors.lock().unwrap();
2437 assert_eq!(added_monitors.len(), 1);
2439 assert_eq!(added_monitors.len(), 2);
2440 assert!(added_monitors[0].0 != added_monitors[1].0);
2442 added_monitors.clear();
2444 let revoke_and_commit = $node.node.handle_commitment_signed(&$prev_node.node.get_our_node_id(), &next_msgs.as_ref().unwrap().1).unwrap();
2446 let mut added_monitors = $node.chan_monitor.added_monitors.lock().unwrap();
2447 assert_eq!(added_monitors.len(), 1);
2448 added_monitors.clear();
2450 assert!($prev_node.node.handle_revoke_and_ack(&$node.node.get_our_node_id(), &revoke_and_commit.0).unwrap().is_none());
2451 let revoke_and_ack = $prev_node.node.handle_commitment_signed(&$node.node.get_our_node_id(), &revoke_and_commit.1.unwrap()).unwrap();
2452 assert!(revoke_and_ack.1.is_none());
2454 let mut added_monitors = $prev_node.chan_monitor.added_monitors.lock().unwrap();
2455 assert_eq!(added_monitors.len(), 2);
2456 added_monitors.clear();
2458 assert!($node.node.handle_revoke_and_ack(&$prev_node.node.get_our_node_id(), &revoke_and_ack.0).unwrap().is_none());
2460 let mut added_monitors = $node.chan_monitor.added_monitors.lock().unwrap();
2461 assert_eq!(added_monitors.len(), 1);
2462 added_monitors.clear();
2468 let mut expected_next_node = expected_route.last().unwrap().node.get_our_node_id();
2469 let mut prev_node = expected_route.last().unwrap();
2470 for node in expected_route.iter().rev() {
2471 assert_eq!(expected_next_node, node.node.get_our_node_id());
2472 if next_msgs.is_some() {
2473 update_fulfill_dance!(node, prev_node, false);
2476 let events = node.node.get_and_clear_pending_events();
2477 assert_eq!(events.len(), 1);
2479 Event::SendFulfillHTLC { ref node_id, ref msg, ref commitment_msg } => {
2480 expected_next_node = node_id.clone();
2481 next_msgs = Some((msg.clone(), commitment_msg.clone()));
2483 _ => panic!("Unexpected event"),
2489 assert_eq!(expected_next_node, origin_node.node.get_our_node_id());
2490 update_fulfill_dance!(origin_node, expected_route.first().unwrap(), true);
2492 let events = origin_node.node.get_and_clear_pending_events();
2493 assert_eq!(events.len(), 1);
2495 Event::PaymentSent { payment_preimage } => {
2496 assert_eq!(payment_preimage, our_payment_preimage);
2498 _ => panic!("Unexpected event"),
2502 const TEST_FINAL_CLTV: u32 = 32;
2504 fn route_payment(origin_node: &Node, expected_route: &[&Node], recv_value: u64) -> ([u8; 32], [u8; 32]) {
2505 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();
2506 assert_eq!(route.hops.len(), expected_route.len());
2507 for (node, hop) in expected_route.iter().zip(route.hops.iter()) {
2508 assert_eq!(hop.pubkey, node.node.get_our_node_id());
2511 send_along_route(origin_node, route, expected_route, recv_value)
2514 fn route_over_limit(origin_node: &Node, expected_route: &[&Node], recv_value: u64) {
2515 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();
2516 assert_eq!(route.hops.len(), expected_route.len());
2517 for (node, hop) in expected_route.iter().zip(route.hops.iter()) {
2518 assert_eq!(hop.pubkey, node.node.get_our_node_id());
2521 let our_payment_preimage = unsafe { [PAYMENT_COUNT; 32] };
2522 unsafe { PAYMENT_COUNT += 1 };
2523 let our_payment_hash = {
2524 let mut sha = Sha256::new();
2525 sha.input(&our_payment_preimage[..]);
2526 let mut ret = [0; 32];
2527 sha.result(&mut ret);
2531 let err = origin_node.node.send_payment(route, our_payment_hash).err().unwrap();
2532 assert_eq!(err.err, "Cannot send value that would put us over our max HTLC value in flight");
2535 fn send_payment(origin: &Node, expected_route: &[&Node], recv_value: u64) {
2536 let our_payment_preimage = route_payment(&origin, expected_route, recv_value).0;
2537 claim_payment(&origin, expected_route, our_payment_preimage);
2540 fn fail_payment(origin_node: &Node, expected_route: &[&Node], our_payment_hash: [u8; 32]) {
2541 assert!(expected_route.last().unwrap().node.fail_htlc_backwards(&our_payment_hash));
2543 let mut added_monitors = expected_route.last().unwrap().chan_monitor.added_monitors.lock().unwrap();
2544 assert_eq!(added_monitors.len(), 1);
2545 added_monitors.clear();
2548 let mut next_msgs: Option<(msgs::UpdateFailHTLC, msgs::CommitmentSigned)> = None;
2549 macro_rules! update_fail_dance {
2550 ($node: expr, $prev_node: expr, $last_node: expr) => {
2552 $node.node.handle_update_fail_htlc(&$prev_node.node.get_our_node_id(), &next_msgs.as_ref().unwrap().0).unwrap();
2553 let revoke_and_commit = $node.node.handle_commitment_signed(&$prev_node.node.get_our_node_id(), &next_msgs.as_ref().unwrap().1).unwrap();
2556 let mut added_monitors = $node.chan_monitor.added_monitors.lock().unwrap();
2557 assert_eq!(added_monitors.len(), 1);
2558 added_monitors.clear();
2560 assert!($prev_node.node.handle_revoke_and_ack(&$node.node.get_our_node_id(), &revoke_and_commit.0).unwrap().is_none());
2562 let mut added_monitors = $prev_node.chan_monitor.added_monitors.lock().unwrap();
2563 assert_eq!(added_monitors.len(), 1);
2564 added_monitors.clear();
2566 let revoke_and_ack = $prev_node.node.handle_commitment_signed(&$node.node.get_our_node_id(), &revoke_and_commit.1.unwrap()).unwrap();
2568 let mut added_monitors = $prev_node.chan_monitor.added_monitors.lock().unwrap();
2569 assert_eq!(added_monitors.len(), 1);
2570 added_monitors.clear();
2572 assert!(revoke_and_ack.1.is_none());
2573 assert!($node.node.get_and_clear_pending_events().is_empty());
2574 assert!($node.node.handle_revoke_and_ack(&$prev_node.node.get_our_node_id(), &revoke_and_ack.0).unwrap().is_none());
2576 let mut added_monitors = $node.chan_monitor.added_monitors.lock().unwrap();
2578 assert_eq!(added_monitors.len(), 1);
2580 assert_eq!(added_monitors.len(), 2);
2581 assert!(added_monitors[0].0 != added_monitors[1].0);
2583 added_monitors.clear();
2589 let mut expected_next_node = expected_route.last().unwrap().node.get_our_node_id();
2590 let mut prev_node = expected_route.last().unwrap();
2591 for node in expected_route.iter().rev() {
2592 assert_eq!(expected_next_node, node.node.get_our_node_id());
2593 if next_msgs.is_some() {
2594 update_fail_dance!(node, prev_node, false);
2597 let events = node.node.get_and_clear_pending_events();
2598 assert_eq!(events.len(), 1);
2600 Event::SendFailHTLC { ref node_id, ref msg, ref commitment_msg } => {
2601 expected_next_node = node_id.clone();
2602 next_msgs = Some((msg.clone(), commitment_msg.clone()));
2604 _ => panic!("Unexpected event"),
2610 assert_eq!(expected_next_node, origin_node.node.get_our_node_id());
2611 update_fail_dance!(origin_node, expected_route.first().unwrap(), true);
2613 let events = origin_node.node.get_and_clear_pending_events();
2614 assert_eq!(events.len(), 1);
2616 Event::PaymentFailed { payment_hash } => {
2617 assert_eq!(payment_hash, our_payment_hash);
2619 _ => panic!("Unexpected event"),
2623 fn create_network(node_count: usize) -> Vec<Node> {
2624 let mut nodes = Vec::new();
2625 let mut rng = thread_rng();
2626 let secp_ctx = Secp256k1::new();
2628 for _ in 0..node_count {
2629 let feeest = Arc::new(test_utils::TestFeeEstimator { sat_per_kw: 253 });
2630 let chain_monitor = Arc::new(chaininterface::ChainWatchInterfaceUtil::new());
2631 let tx_broadcaster = Arc::new(test_utils::TestBroadcaster{txn_broadcasted: Mutex::new(Vec::new())});
2632 let chan_monitor = Arc::new(test_utils::TestChannelMonitor::new(chain_monitor.clone(), tx_broadcaster.clone()));
2634 let mut key_slice = [0; 32];
2635 rng.fill_bytes(&mut key_slice);
2636 SecretKey::from_slice(&secp_ctx, &key_slice).unwrap()
2638 let node = ChannelManager::new(node_id.clone(), 0, true, Network::Testnet, feeest.clone(), chan_monitor.clone(), chain_monitor.clone(), tx_broadcaster.clone()).unwrap();
2639 let router = Router::new(PublicKey::from_secret_key(&secp_ctx, &node_id).unwrap());
2640 nodes.push(Node { feeest, chain_monitor, tx_broadcaster, chan_monitor, node_id, node, router });
2647 fn fake_network_test() {
2648 // Simple test which builds a network of ChannelManagers, connects them to each other, and
2649 // tests that payments get routed and transactions broadcast in semi-reasonable ways.
2650 let nodes = create_network(4);
2652 // Create some initial channels
2653 let chan_1 = create_announced_chan_between_nodes(&nodes, 0, 1);
2654 let chan_2 = create_announced_chan_between_nodes(&nodes, 1, 2);
2655 let chan_3 = create_announced_chan_between_nodes(&nodes, 2, 3);
2657 // Rebalance the network a bit by relaying one payment through all the channels...
2658 send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3])[..], 8000000);
2659 send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3])[..], 8000000);
2660 send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3])[..], 8000000);
2661 send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3])[..], 8000000);
2663 // Send some more payments
2664 send_payment(&nodes[1], &vec!(&nodes[2], &nodes[3])[..], 1000000);
2665 send_payment(&nodes[3], &vec!(&nodes[2], &nodes[1], &nodes[0])[..], 1000000);
2666 send_payment(&nodes[3], &vec!(&nodes[2], &nodes[1])[..], 1000000);
2668 // Test failure packets
2669 let payment_hash_1 = route_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3])[..], 1000000).1;
2670 fail_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3])[..], payment_hash_1);
2672 // Add a new channel that skips 3
2673 let chan_4 = create_announced_chan_between_nodes(&nodes, 1, 3);
2675 send_payment(&nodes[0], &vec!(&nodes[1], &nodes[3])[..], 1000000);
2676 send_payment(&nodes[2], &vec!(&nodes[3])[..], 1000000);
2677 send_payment(&nodes[1], &vec!(&nodes[3])[..], 8000000);
2678 send_payment(&nodes[1], &vec!(&nodes[3])[..], 8000000);
2679 send_payment(&nodes[1], &vec!(&nodes[3])[..], 8000000);
2680 send_payment(&nodes[1], &vec!(&nodes[3])[..], 8000000);
2681 send_payment(&nodes[1], &vec!(&nodes[3])[..], 8000000);
2683 // Do some rebalance loop payments, simultaneously
2684 let mut hops = Vec::with_capacity(3);
2685 hops.push(RouteHop {
2686 pubkey: nodes[2].node.get_our_node_id(),
2687 short_channel_id: chan_2.0.contents.short_channel_id,
2689 cltv_expiry_delta: chan_3.0.contents.cltv_expiry_delta as u32
2691 hops.push(RouteHop {
2692 pubkey: nodes[3].node.get_our_node_id(),
2693 short_channel_id: chan_3.0.contents.short_channel_id,
2695 cltv_expiry_delta: chan_4.1.contents.cltv_expiry_delta as u32
2697 hops.push(RouteHop {
2698 pubkey: nodes[1].node.get_our_node_id(),
2699 short_channel_id: chan_4.0.contents.short_channel_id,
2701 cltv_expiry_delta: TEST_FINAL_CLTV,
2703 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;
2704 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;
2705 let payment_preimage_1 = send_along_route(&nodes[1], Route { hops }, &vec!(&nodes[2], &nodes[3], &nodes[1])[..], 1000000).0;
2707 let mut hops = Vec::with_capacity(3);
2708 hops.push(RouteHop {
2709 pubkey: nodes[3].node.get_our_node_id(),
2710 short_channel_id: chan_4.0.contents.short_channel_id,
2712 cltv_expiry_delta: chan_3.1.contents.cltv_expiry_delta as u32
2714 hops.push(RouteHop {
2715 pubkey: nodes[2].node.get_our_node_id(),
2716 short_channel_id: chan_3.0.contents.short_channel_id,
2718 cltv_expiry_delta: chan_2.1.contents.cltv_expiry_delta as u32
2720 hops.push(RouteHop {
2721 pubkey: nodes[1].node.get_our_node_id(),
2722 short_channel_id: chan_2.0.contents.short_channel_id,
2724 cltv_expiry_delta: TEST_FINAL_CLTV,
2726 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;
2727 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;
2728 let payment_hash_2 = send_along_route(&nodes[1], Route { hops }, &vec!(&nodes[3], &nodes[2], &nodes[1])[..], 1000000).1;
2730 // Claim the rebalances...
2731 fail_payment(&nodes[1], &vec!(&nodes[3], &nodes[2], &nodes[1])[..], payment_hash_2);
2732 claim_payment(&nodes[1], &vec!(&nodes[2], &nodes[3], &nodes[1])[..], payment_preimage_1);
2734 // Add a duplicate new channel from 2 to 4
2735 let chan_5 = create_announced_chan_between_nodes(&nodes, 1, 3);
2737 // Send some payments across both channels
2738 let payment_preimage_3 = route_payment(&nodes[0], &vec!(&nodes[1], &nodes[3])[..], 3000000).0;
2739 let payment_preimage_4 = route_payment(&nodes[0], &vec!(&nodes[1], &nodes[3])[..], 3000000).0;
2740 let payment_preimage_5 = route_payment(&nodes[0], &vec!(&nodes[1], &nodes[3])[..], 3000000).0;
2742 route_over_limit(&nodes[0], &vec!(&nodes[1], &nodes[3])[..], 3000000);
2744 //TODO: Test that routes work again here as we've been notified that the channel is full
2746 claim_payment(&nodes[0], &vec!(&nodes[1], &nodes[3])[..], payment_preimage_3);
2747 claim_payment(&nodes[0], &vec!(&nodes[1], &nodes[3])[..], payment_preimage_4);
2748 claim_payment(&nodes[0], &vec!(&nodes[1], &nodes[3])[..], payment_preimage_5);
2750 // Close down the channels...
2751 close_channel(&nodes[0], &nodes[1], &chan_1.2, chan_1.3, true);
2752 close_channel(&nodes[1], &nodes[2], &chan_2.2, chan_2.3, false);
2753 close_channel(&nodes[2], &nodes[3], &chan_3.2, chan_3.3, true);
2754 close_channel(&nodes[1], &nodes[3], &chan_4.2, chan_4.3, false);
2755 close_channel(&nodes[1], &nodes[3], &chan_5.2, chan_5.3, false);
2757 // Check that we processed all pending events
2759 assert_eq!(node.node.get_and_clear_pending_events().len(), 0);
2760 assert_eq!(node.chan_monitor.added_monitors.lock().unwrap().len(), 0);
2764 #[derive(PartialEq)]
2765 enum HTLCType { NONE, TIMEOUT, SUCCESS }
2766 fn test_txn_broadcast(node: &Node, chan: &(msgs::ChannelUpdate, msgs::ChannelUpdate, [u8; 32], Transaction), commitment_tx: Option<Transaction>, has_htlc_tx: HTLCType) -> Vec<Transaction> {
2767 let mut node_txn = node.tx_broadcaster.txn_broadcasted.lock().unwrap();
2768 assert!(node_txn.len() >= if commitment_tx.is_some() { 0 } else { 1 } + if has_htlc_tx == HTLCType::NONE { 0 } else { 1 });
2770 let mut res = Vec::with_capacity(2);
2772 if let Some(explicit_tx) = commitment_tx {
2773 res.push(explicit_tx.clone());
2775 for tx in node_txn.iter() {
2776 if tx.input.len() == 1 && tx.input[0].prev_hash == chan.3.txid() {
2777 let mut funding_tx_map = HashMap::new();
2778 funding_tx_map.insert(chan.3.txid(), chan.3.clone());
2779 tx.verify(&funding_tx_map).unwrap();
2780 res.push(tx.clone());
2784 assert_eq!(res.len(), 1);
2786 if has_htlc_tx != HTLCType::NONE {
2787 for tx in node_txn.iter() {
2788 if tx.input.len() == 1 && tx.input[0].prev_hash == res[0].txid() {
2789 let mut funding_tx_map = HashMap::new();
2790 funding_tx_map.insert(res[0].txid(), res[0].clone());
2791 tx.verify(&funding_tx_map).unwrap();
2792 if has_htlc_tx == HTLCType::TIMEOUT {
2793 assert!(tx.lock_time != 0);
2795 assert!(tx.lock_time == 0);
2797 res.push(tx.clone());
2801 assert_eq!(res.len(), 2);
2807 fn check_preimage_claim(node: &Node, prev_txn: &Vec<Transaction>) -> Vec<Transaction> {
2808 let mut node_txn = node.tx_broadcaster.txn_broadcasted.lock().unwrap();
2810 assert!(node_txn.len() >= 1);
2811 assert_eq!(node_txn[0].input.len(), 1);
2812 let mut found_prev = false;
2814 for tx in prev_txn {
2815 if node_txn[0].input[0].prev_hash == tx.txid() {
2816 let mut funding_tx_map = HashMap::new();
2817 funding_tx_map.insert(tx.txid(), tx.clone());
2818 node_txn[0].verify(&funding_tx_map).unwrap();
2820 assert!(node_txn[0].input[0].witness[2].len() > 106); // must spend an htlc output
2821 assert_eq!(tx.input.len(), 1); // must spend a commitment tx
2827 assert!(found_prev);
2829 let mut res = Vec::new();
2830 mem::swap(&mut *node_txn, &mut res);
2834 fn get_announce_close_broadcast_events(nodes: &Vec<Node>, a: usize, b: usize) {
2835 let events_1 = nodes[a].node.get_and_clear_pending_events();
2836 assert_eq!(events_1.len(), 1);
2837 let as_update = match events_1[0] {
2838 Event::BroadcastChannelUpdate { ref msg } => {
2841 _ => panic!("Unexpected event"),
2844 let events_2 = nodes[b].node.get_and_clear_pending_events();
2845 assert_eq!(events_2.len(), 1);
2846 let bs_update = match events_2[0] {
2847 Event::BroadcastChannelUpdate { ref msg } => {
2850 _ => panic!("Unexpected event"),
2854 node.router.handle_channel_update(&as_update).unwrap();
2855 node.router.handle_channel_update(&bs_update).unwrap();
2860 fn channel_monitor_network_test() {
2861 // Simple test which builds a network of ChannelManagers, connects them to each other, and
2862 // tests that ChannelMonitor is able to recover from various states.
2863 let nodes = create_network(5);
2865 // Create some initial channels
2866 let chan_1 = create_announced_chan_between_nodes(&nodes, 0, 1);
2867 let chan_2 = create_announced_chan_between_nodes(&nodes, 1, 2);
2868 let chan_3 = create_announced_chan_between_nodes(&nodes, 2, 3);
2869 let chan_4 = create_announced_chan_between_nodes(&nodes, 3, 4);
2871 // Rebalance the network a bit by relaying one payment through all the channels...
2872 send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3], &nodes[4])[..], 8000000);
2873 send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3], &nodes[4])[..], 8000000);
2874 send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3], &nodes[4])[..], 8000000);
2875 send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3], &nodes[4])[..], 8000000);
2877 // Simple case with no pending HTLCs:
2878 nodes[1].node.peer_disconnected(&nodes[0].node.get_our_node_id(), true);
2880 let mut node_txn = test_txn_broadcast(&nodes[1], &chan_1, None, HTLCType::NONE);
2881 let header = BlockHeader { version: 0x20000000, prev_blockhash: Default::default(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
2882 nodes[0].chain_monitor.block_connected_with_filtering(&Block { header, txdata: vec![node_txn.drain(..).next().unwrap()] }, 1);
2883 assert_eq!(nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().len(), 0);
2885 get_announce_close_broadcast_events(&nodes, 0, 1);
2886 assert_eq!(nodes[0].node.list_channels().len(), 0);
2887 assert_eq!(nodes[1].node.list_channels().len(), 1);
2889 // One pending HTLC is discarded by the force-close:
2890 let payment_preimage_1 = route_payment(&nodes[1], &vec!(&nodes[2], &nodes[3])[..], 3000000).0;
2892 // Simple case of one pending HTLC to HTLC-Timeout
2893 nodes[1].node.peer_disconnected(&nodes[2].node.get_our_node_id(), true);
2895 let mut node_txn = test_txn_broadcast(&nodes[1], &chan_2, None, HTLCType::TIMEOUT);
2896 let header = BlockHeader { version: 0x20000000, prev_blockhash: Default::default(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
2897 nodes[2].chain_monitor.block_connected_with_filtering(&Block { header, txdata: vec![node_txn.drain(..).next().unwrap()] }, 1);
2898 assert_eq!(nodes[2].tx_broadcaster.txn_broadcasted.lock().unwrap().len(), 0);
2900 get_announce_close_broadcast_events(&nodes, 1, 2);
2901 assert_eq!(nodes[1].node.list_channels().len(), 0);
2902 assert_eq!(nodes[2].node.list_channels().len(), 1);
2904 macro_rules! claim_funds {
2905 ($node: expr, $prev_node: expr, $preimage: expr) => {
2907 assert!($node.node.claim_funds($preimage));
2909 let mut added_monitors = $node.chan_monitor.added_monitors.lock().unwrap();
2910 assert_eq!(added_monitors.len(), 1);
2911 added_monitors.clear();
2914 let events = $node.node.get_and_clear_pending_events();
2915 assert_eq!(events.len(), 1);
2917 Event::SendFulfillHTLC { ref node_id, .. } => {
2918 assert_eq!(*node_id, $prev_node.node.get_our_node_id());
2920 _ => panic!("Unexpected event"),
2926 // nodes[3] gets the preimage, but nodes[2] already disconnected, resulting in a nodes[2]
2927 // HTLC-Timeout and a nodes[3] claim against it (+ its own announces)
2928 nodes[2].node.peer_disconnected(&nodes[3].node.get_our_node_id(), true);
2930 let node_txn = test_txn_broadcast(&nodes[2], &chan_3, None, HTLCType::TIMEOUT);
2932 // Claim the payment on nodes[3], giving it knowledge of the preimage
2933 claim_funds!(nodes[3], nodes[2], payment_preimage_1);
2935 let header = BlockHeader { version: 0x20000000, prev_blockhash: Default::default(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
2936 nodes[3].chain_monitor.block_connected_with_filtering(&Block { header, txdata: vec![node_txn[0].clone()] }, 1);
2938 check_preimage_claim(&nodes[3], &node_txn);
2940 get_announce_close_broadcast_events(&nodes, 2, 3);
2941 assert_eq!(nodes[2].node.list_channels().len(), 0);
2942 assert_eq!(nodes[3].node.list_channels().len(), 1);
2944 // One pending HTLC to time out:
2945 let payment_preimage_2 = route_payment(&nodes[3], &vec!(&nodes[4])[..], 3000000).0;
2948 let mut header = BlockHeader { version: 0x20000000, prev_blockhash: Default::default(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
2949 nodes[3].chain_monitor.block_connected_checked(&header, 1, &Vec::new()[..], &[0; 0]);
2950 for i in 2..TEST_FINAL_CLTV - 3 {
2951 header = BlockHeader { version: 0x20000000, prev_blockhash: header.bitcoin_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
2952 nodes[3].chain_monitor.block_connected_checked(&header, i, &Vec::new()[..], &[0; 0]);
2955 let node_txn = test_txn_broadcast(&nodes[3], &chan_4, None, HTLCType::TIMEOUT);
2957 // Claim the payment on nodes[3], giving it knowledge of the preimage
2958 claim_funds!(nodes[4], nodes[3], payment_preimage_2);
2960 header = BlockHeader { version: 0x20000000, prev_blockhash: Default::default(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
2961 nodes[4].chain_monitor.block_connected_checked(&header, 1, &Vec::new()[..], &[0; 0]);
2962 for i in 2..TEST_FINAL_CLTV - 3 {
2963 header = BlockHeader { version: 0x20000000, prev_blockhash: header.bitcoin_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
2964 nodes[4].chain_monitor.block_connected_checked(&header, i, &Vec::new()[..], &[0; 0]);
2967 test_txn_broadcast(&nodes[4], &chan_4, None, HTLCType::SUCCESS);
2969 header = BlockHeader { version: 0x20000000, prev_blockhash: header.bitcoin_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
2970 nodes[4].chain_monitor.block_connected_with_filtering(&Block { header, txdata: vec![node_txn[0].clone()] }, TEST_FINAL_CLTV - 5);
2972 check_preimage_claim(&nodes[4], &node_txn);
2974 get_announce_close_broadcast_events(&nodes, 3, 4);
2975 assert_eq!(nodes[3].node.list_channels().len(), 0);
2976 assert_eq!(nodes[4].node.list_channels().len(), 0);
2978 // Create some new channels:
2979 let chan_5 = create_announced_chan_between_nodes(&nodes, 0, 1);
2981 // A pending HTLC which will be revoked:
2982 let payment_preimage_3 = route_payment(&nodes[0], &vec!(&nodes[1])[..], 3000000).0;
2983 // Get the will-be-revoked local txn from nodes[0]
2984 let revoked_local_txn = nodes[0].node.channel_state.lock().unwrap().by_id.iter().next().unwrap().1.last_local_commitment_txn.clone();
2985 // Revoke the old state
2986 claim_payment(&nodes[0], &vec!(&nodes[1])[..], payment_preimage_3);
2989 let mut header = BlockHeader { version: 0x20000000, prev_blockhash: Default::default(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
2990 nodes[1].chain_monitor.block_connected_with_filtering(&Block { header, txdata: vec![revoked_local_txn[0].clone()] }, 1);
2992 let mut node_txn = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap();
2993 assert_eq!(node_txn.len(), 1);
2994 assert_eq!(node_txn[0].input.len(), 1);
2996 let mut funding_tx_map = HashMap::new();
2997 funding_tx_map.insert(revoked_local_txn[0].txid(), revoked_local_txn[0].clone());
2998 node_txn[0].verify(&funding_tx_map).unwrap();
3002 nodes[0].chain_monitor.block_connected_with_filtering(&Block { header, txdata: vec![revoked_local_txn[0].clone()] }, 1);
3003 let node_txn = test_txn_broadcast(&nodes[0], &chan_5, Some(revoked_local_txn[0].clone()), HTLCType::TIMEOUT);
3004 header = BlockHeader { version: 0x20000000, prev_blockhash: header.bitcoin_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
3005 nodes[1].chain_monitor.block_connected_with_filtering(&Block { header, txdata: vec![node_txn[1].clone()] }, 1);
3007 //TODO: At this point nodes[1] should claim the revoked HTLC-Timeout output, but that's
3008 //not yet implemented in ChannelMonitor
3010 get_announce_close_broadcast_events(&nodes, 0, 1);
3011 assert_eq!(nodes[0].node.list_channels().len(), 0);
3012 assert_eq!(nodes[1].node.list_channels().len(), 0);
3014 // Check that we processed all pending events
3016 assert_eq!(node.node.get_and_clear_pending_events().len(), 0);
3017 assert_eq!(node.chan_monitor.added_monitors.lock().unwrap().len(), 0);
3022 fn test_unconf_chan() {
3023 // After creating a chan between nodes, we disconnect all blocks previously seen to force a channel close on nodes[0] side
3024 let nodes = create_network(2);
3025 create_announced_chan_between_nodes(&nodes, 0, 1);
3027 let channel_state = nodes[0].node.channel_state.lock().unwrap();
3028 assert_eq!(channel_state.by_id.len(), 1);
3029 assert_eq!(channel_state.short_to_id.len(), 1);
3030 mem::drop(channel_state);
3032 let mut headers = Vec::new();
3033 let mut header = BlockHeader { version: 0x20000000, prev_blockhash: Default::default(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
3034 headers.push(header.clone());
3036 header = BlockHeader { version: 0x20000000, prev_blockhash: header.bitcoin_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
3037 headers.push(header.clone());
3039 while !headers.is_empty() {
3040 nodes[0].node.block_disconnected(&headers.pop().unwrap());
3042 let channel_state = nodes[0].node.channel_state.lock().unwrap();
3043 assert_eq!(channel_state.by_id.len(), 0);
3044 assert_eq!(channel_state.short_to_id.len(), 0);