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;
7 use bitcoin::util::uint::Uint256;
9 use secp256k1::key::{SecretKey,PublicKey};
10 use secp256k1::{Secp256k1,Message};
11 use secp256k1::ecdh::SharedSecret;
14 use chain::chaininterface::{ChainListener,ChainWatchInterface,FeeEstimator};
15 use ln::channel::Channel;
16 use ln::channelmonitor::ManyChannelMonitor;
17 use ln::router::Route;
19 use ln::msgs::{HandleError,ChannelMessageHandler,MsgEncodable,MsgDecodable};
20 use util::{byte_utils, events, internal_traits, rng};
21 use util::sha2::Sha256;
23 use crypto::mac::{Mac,MacResult};
24 use crypto::hmac::Hmac;
25 use crypto::digest::Digest;
26 use crypto::symmetriccipher::SynchronousStreamCipher;
27 use crypto::chacha20::ChaCha20;
29 use std::sync::{Mutex,MutexGuard,Arc};
30 use std::collections::HashMap;
31 use std::collections::hash_map;
33 use std::time::{Instant,Duration};
35 /// Stores the info we will need to send when we want to forward an HTLC onwards
36 pub struct PendingForwardHTLCInfo {
37 onion_packet: Option<msgs::OnionPacket>,
38 payment_hash: [u8; 32],
39 short_channel_id: u64,
40 prev_short_channel_id: u64,
42 outgoing_cltv_value: u32,
44 //TODO: This is public, and needed to call Channel::update_add_htlc, so there needs to be a way to
45 //initialize it usefully...probably make it optional in Channel instead).
46 impl PendingForwardHTLCInfo {
47 pub fn dummy() -> Self {
50 payment_hash: [0; 32],
52 prev_short_channel_id: 0,
54 outgoing_cltv_value: 0,
59 enum PendingOutboundHTLC {
61 source_short_channel_id: u64,
62 incoming_packet_shared_secret: SharedSecret,
67 /// Used for channel rebalancing
69 source_short_channel_id: u64,
70 incoming_packet_shared_secret: SharedSecret,
75 enum HTLCFailReason<'a> {
77 err: &'a msgs::OnionErrorPacket,
85 /// We hold back HTLCs we intend to relay for a random interval in the range (this, 5*this). This
86 /// provides some limited amount of privacy. Ideally this would range from somewhere like 1 second
87 /// to 30 seconds, but people expect lightning to be, you know, kinda fast, sadly. We could
88 /// probably increase this significantly.
89 const MIN_HTLC_RELAY_HOLDING_CELL_MILLIS: u32 = 50;
91 struct ChannelHolder {
92 by_id: HashMap<Uint256, Channel>,
93 short_to_id: HashMap<u64, Uint256>,
94 next_forward: Instant,
95 /// short channel id -> forward infos. Key of 0 means payments received
96 forward_htlcs: HashMap<u64, Vec<PendingForwardHTLCInfo>>,
97 claimable_htlcs: HashMap<[u8; 32], PendingOutboundHTLC>,
99 struct MutChannelHolder<'a> {
100 by_id: &'a mut HashMap<Uint256, Channel>,
101 short_to_id: &'a mut HashMap<u64, Uint256>,
102 next_forward: &'a mut Instant,
103 /// short channel id -> forward infos. Key of 0 means payments received
104 forward_htlcs: &'a mut HashMap<u64, Vec<PendingForwardHTLCInfo>>,
105 claimable_htlcs: &'a mut HashMap<[u8; 32], PendingOutboundHTLC>,
108 fn borrow_parts(&mut self) -> MutChannelHolder {
110 by_id: &mut self.by_id,
111 short_to_id: &mut self.short_to_id,
112 next_forward: &mut self.next_forward,
113 /// short channel id -> forward infos. Key of 0 means payments received
114 forward_htlcs: &mut self.forward_htlcs,
115 claimable_htlcs: &mut self.claimable_htlcs,
120 /// Manager which keeps track of a number of channels and sends messages to the appropriate
121 /// channel, also tracking HTLC preimages and forwarding onion packets appropriately.
122 /// Implements ChannelMessageHandler, handling the multi-channel parts and passing things through
123 /// to individual Channels.
124 pub struct ChannelManager {
125 genesis_hash: Sha256dHash,
126 fee_estimator: Arc<FeeEstimator>,
127 monitor: Arc<ManyChannelMonitor>,
128 chain_monitor: Arc<ChainWatchInterface>,
130 announce_channels_publicly: bool,
131 fee_proportional_millionths: u32,
134 channel_state: Mutex<ChannelHolder>,
135 our_network_key: SecretKey,
137 pending_events: Mutex<Vec<events::Event>>,
140 const CLTV_EXPIRY_DELTA: u16 = 6 * 24 * 2; //TODO?
142 macro_rules! secp_call {
146 //TODO: Make the err a parameter!
147 Err(_) => return Err(HandleError{err: "Key error", msg: None})
154 shared_secret: SharedSecret,
156 blinding_factor: [u8; 32],
157 ephemeral_pubkey: PublicKey,
162 impl ChannelManager {
163 /// Constructs a new ChannelManager to hold several channels and route between them. This is
164 /// the main "logic hub" for all channel-related actions, and implements ChannelMessageHandler.
165 /// fee_proportional_millionths is an optional fee to charge any payments routed through us.
166 /// Non-proportional fees are fixed according to our risk using the provided fee estimator.
167 /// panics if channel_value_satoshis is >= (1 << 24)!
168 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>) -> Result<Arc<ChannelManager>, secp256k1::Error> {
169 let secp_ctx = Secp256k1::new();
171 let res = Arc::new(ChannelManager {
172 genesis_hash: genesis_block(network).header.bitcoin_hash(),
173 fee_estimator: feeest.clone(),
174 monitor: monitor.clone(),
175 chain_monitor: chain_monitor,
177 announce_channels_publicly: announce_channels_publicly,
178 fee_proportional_millionths: fee_proportional_millionths,
181 channel_state: Mutex::new(ChannelHolder{
182 by_id: HashMap::new(),
183 short_to_id: HashMap::new(),
184 next_forward: Instant::now(),
185 forward_htlcs: HashMap::new(),
186 claimable_htlcs: HashMap::new(),
188 our_network_key: our_network_key,
190 pending_events: Mutex::new(Vec::new()),
192 let weak_res = Arc::downgrade(&res);
193 res.chain_monitor.register_listener(weak_res);
197 pub fn create_channel(&self, their_network_key: PublicKey, channel_value_satoshis: u64, user_id: u64) -> Result<msgs::OpenChannel, HandleError> {
198 let channel = Channel::new_outbound(&*self.fee_estimator, their_network_key, channel_value_satoshis, self.announce_channels_publicly, user_id);
199 let res = channel.get_open_channel(self.genesis_hash.clone(), &*self.fee_estimator)?;
200 let mut channel_state = self.channel_state.lock().unwrap();
201 match channel_state.by_id.insert(channel.channel_id(), channel) {
202 Some(_) => panic!("RNG is bad???"),
208 fn gen_rho_mu_from_shared_secret(shared_secret: &SharedSecret) -> ([u8; 32], [u8; 32]) {
210 let mut hmac = Hmac::new(Sha256::new(), &[0x72, 0x68, 0x6f]); // rho
211 hmac.input(&shared_secret[..]);
212 let mut res = [0; 32];
213 hmac.raw_result(&mut res);
217 let mut hmac = Hmac::new(Sha256::new(), &[0x6d, 0x75]); // mu
218 hmac.input(&shared_secret[..]);
219 let mut res = [0; 32];
220 hmac.raw_result(&mut res);
226 fn gen_um_from_shared_secret(shared_secret: &SharedSecret) -> [u8; 32] {
227 let mut hmac = Hmac::new(Sha256::new(), &[0x75, 0x6d]); // um
228 hmac.input(&shared_secret[..]);
229 let mut res = [0; 32];
230 hmac.raw_result(&mut res);
234 fn gen_ammag_from_shared_secret(shared_secret: &SharedSecret) -> [u8; 32] {
235 let mut hmac = Hmac::new(Sha256::new(), &[0x61, 0x6d, 0x6d, 0x61, 0x67]); // ammag
236 hmac.input(&shared_secret[..]);
237 let mut res = [0; 32];
238 hmac.raw_result(&mut res);
242 fn construct_onion_keys(secp_ctx: &Secp256k1, route: &Route, session_priv: &SecretKey) -> Result<Vec<OnionKeys>, HandleError> {
243 let mut res = Vec::with_capacity(route.hops.len());
244 let mut blinded_priv = session_priv.clone();
245 let mut blinded_pub = secp_call!(PublicKey::from_secret_key(secp_ctx, &blinded_priv));
246 let mut first_iteration = true;
248 for hop in route.hops.iter() {
249 let shared_secret = SharedSecret::new(secp_ctx, &hop.pubkey, &blinded_priv);
251 let mut sha = Sha256::new();
252 sha.input(&blinded_pub.serialize()[..]);
253 sha.input(&shared_secret[..]);
254 let mut blinding_factor = [0u8; 32];
255 sha.result(&mut blinding_factor);
258 blinded_pub = secp_call!(PublicKey::from_secret_key(secp_ctx, &blinded_priv));
259 first_iteration = false;
261 let ephemeral_pubkey = blinded_pub;
263 secp_call!(blinded_priv.mul_assign(secp_ctx, &secp_call!(SecretKey::from_slice(secp_ctx, &blinding_factor))));
264 blinded_pub = secp_call!(PublicKey::from_secret_key(secp_ctx, &blinded_priv));
266 let (rho, mu) = ChannelManager::gen_rho_mu_from_shared_secret(&shared_secret);
270 shared_secret: shared_secret,
272 blinding_factor: blinding_factor,
273 ephemeral_pubkey: ephemeral_pubkey,
282 /// returns the hop data, as well as the first-hop value_msat and CLTV value we should send.
283 fn build_onion_payloads(route: &Route) -> Result<(Vec<msgs::OnionHopData>, u64, u32), HandleError> {
284 let mut cur_value_msat = 0u64;
285 let mut cur_cltv = 0u32;
286 let mut last_short_channel_id = 0;
287 let mut res: Vec<msgs::OnionHopData> = Vec::with_capacity(route.hops.len());
288 internal_traits::test_no_dealloc::<msgs::OnionHopData>(None);
289 unsafe { res.set_len(route.hops.len()); }
291 for (idx, hop) in route.hops.iter().enumerate().rev() {
292 // First hop gets special values so that it can check, on receipt, that everything is
293 // exactly as it should be (and the next hop isn't trying to probe to find out if we're
294 // the intended recipient).
295 let value_msat = if cur_value_msat == 0 { hop.fee_msat } else { cur_value_msat };
296 let cltv = if cur_cltv == 0 { hop.cltv_expiry_delta } else { cur_cltv };
297 res[idx] = msgs::OnionHopData {
299 data: msgs::OnionRealm0HopData {
300 short_channel_id: last_short_channel_id,
301 amt_to_forward: value_msat,
302 outgoing_cltv_value: cltv,
306 cur_value_msat += hop.fee_msat;
307 if cur_value_msat >= 21000000 * 100000000 * 1000 {
308 return Err(HandleError{err: "Channel fees overflowed?!", msg: None});
310 cur_cltv += hop.cltv_expiry_delta as u32;
311 if cur_cltv >= 500000000 {
312 return Err(HandleError{err: "Channel CLTV overflowed?!", msg: None});
314 last_short_channel_id = hop.short_channel_id;
316 Ok((res, cur_value_msat, cur_cltv))
320 fn shift_arr_right(arr: &mut [u8; 20*65]) {
322 ptr::copy(arr[0..].as_ptr(), arr[65..].as_mut_ptr(), 19*65);
330 fn xor_bufs(dst: &mut[u8], src: &[u8]) {
331 assert_eq!(dst.len(), src.len());
333 for i in 0..dst.len() {
338 const ZERO:[u8; 21*65] = [0; 21*65];
339 fn construct_onion_packet(mut payloads: Vec<msgs::OnionHopData>, onion_keys: Vec<OnionKeys>, associated_data: Vec<u8>) -> Result<msgs::OnionPacket, HandleError> {
340 let mut buf = Vec::with_capacity(21*65);
341 buf.resize(21*65, 0);
344 let iters = payloads.len() - 1;
345 let end_len = iters * 65;
346 let mut res = Vec::with_capacity(end_len);
347 res.resize(end_len, 0);
349 for (i, keys) in onion_keys.iter().enumerate() {
350 if i == payloads.len() - 1 { continue; }
351 let mut chacha = ChaCha20::new(&keys.rho, &[0u8; 8]);
352 chacha.process(&ChannelManager::ZERO, &mut buf); // We don't have a seek function :(
353 ChannelManager::xor_bufs(&mut res[0..(i + 1)*65], &buf[(20 - i)*65..21*65]);
358 let mut packet_data = [0; 20*65];
359 let mut hmac_res = [0; 32];
361 for (i, (payload, keys)) in payloads.iter_mut().zip(onion_keys.iter()).rev().enumerate() {
362 ChannelManager::shift_arr_right(&mut packet_data);
363 payload.hmac = hmac_res;
364 packet_data[0..65].copy_from_slice(&payload.encode()[..]);
366 let mut chacha = ChaCha20::new(&keys.rho, &[0u8; 8]);
367 chacha.process(&packet_data, &mut buf[0..20*65]);
368 packet_data[..].copy_from_slice(&buf[0..20*65]);
371 packet_data[20*65 - filler.len()..20*65].copy_from_slice(&filler[..]);
374 let mut hmac = Hmac::new(Sha256::new(), &keys.mu);
375 hmac.input(&packet_data);
376 hmac.input(&associated_data[..]);
377 hmac.raw_result(&mut hmac_res);
380 Ok(msgs::OnionPacket{
382 public_key: onion_keys.first().unwrap().ephemeral_pubkey,
383 hop_data: packet_data,
388 /// Encrypts a failure packet. raw_packet can either be a
389 /// msgs::DecodedOnionErrorPacket.encode() result or a msgs::OnionErrorPacket.data element.
390 fn encrypt_failure_packet(shared_secret: &SharedSecret, raw_packet: &[u8]) -> msgs::OnionErrorPacket {
391 let ammag = ChannelManager::gen_ammag_from_shared_secret(&shared_secret);
393 let mut packet_crypted = Vec::with_capacity(raw_packet.len());
394 packet_crypted.resize(raw_packet.len(), 0);
395 let mut chacha = ChaCha20::new(&ammag, &[0u8; 8]);
396 chacha.process(&raw_packet, &mut packet_crypted[..]);
397 msgs::OnionErrorPacket {
398 data: packet_crypted,
402 fn build_failure_packet(shared_secret: &SharedSecret, failure_type: u16, failure_data: &[u8]) -> msgs::DecodedOnionErrorPacket {
403 assert!(failure_data.len() <= 256 - 2);
405 let um = ChannelManager::gen_um_from_shared_secret(&shared_secret);
408 let mut res = Vec::with_capacity(2 + failure_data.len());
409 res.push(((failure_type >> 8) & 0xff) as u8);
410 res.push(((failure_type >> 0) & 0xff) as u8);
411 res.extend_from_slice(&failure_data[..]);
415 let mut res = Vec::with_capacity(256 - 2 - failure_data.len());
416 res.resize(256 - 2 - failure_data.len(), 0);
419 let mut packet = msgs::DecodedOnionErrorPacket {
421 failuremsg: failuremsg,
425 let mut hmac = Hmac::new(Sha256::new(), &um);
426 hmac.input(&packet.encode()[32..]);
427 hmac.raw_result(&mut packet.hmac);
432 fn build_first_hop_failure_packet(shared_secret: &SharedSecret, failure_type: u16, failure_data: &[u8]) -> msgs::OnionErrorPacket {
433 let failure_packet = ChannelManager::build_failure_packet(shared_secret, failure_type, failure_data);
434 ChannelManager::encrypt_failure_packet(shared_secret, &failure_packet.encode()[..])
437 /// only fails if the channel does not yet have an assigned short_id
438 fn get_channel_update(&self, chan: &mut Channel) -> Result<msgs::ChannelUpdate, HandleError> {
439 let short_channel_id = match chan.get_short_channel_id() {
440 None => return Err(HandleError{err: "Channel not yet established", msg: None}),
444 let were_node_one = PublicKey::from_secret_key(&self.secp_ctx, &self.our_network_key).unwrap().serialize()[..] < chan.get_their_node_id().serialize()[..];
446 let unsigned = msgs::UnsignedChannelUpdate {
447 chain_hash: self.genesis_hash,
448 short_channel_id: short_channel_id,
449 timestamp: chan.get_channel_update_count(),
450 flags: (!were_node_one) as u16 | ((!chan.is_live() as u16) << 1),
451 cltv_expiry_delta: CLTV_EXPIRY_DELTA,
452 htlc_minimum_msat: chan.get_our_htlc_minimum_msat(),
453 fee_base_msat: chan.get_our_fee_base_msat(&*self.fee_estimator),
454 fee_proportional_millionths: self.fee_proportional_millionths,
457 let msg_hash = Sha256dHash::from_data(&unsigned.encode()[..]);
458 let sig = self.secp_ctx.sign(&Message::from_slice(&msg_hash[..]).unwrap(), &self.our_network_key).unwrap(); //TODO Can we unwrap here?
460 Ok(msgs::ChannelUpdate {
466 /// Sends a payment along a given route, returning the UpdateAddHTLC message to give to the
467 /// first hop in route. Value parameters are provided via the last hop in route, see
468 /// documentation for RouteHop fields for more info.
469 /// See-also docs on Channel::send_htlc_and_commit.
470 pub fn send_payment(&self, route: Route, payment_hash: [u8; 32]) -> Result<Option<(msgs::UpdateAddHTLC, msgs::CommitmentSigned)>, HandleError> {
471 if route.hops.len() < 1 || route.hops.len() > 20 {
472 return Err(HandleError{err: "Route didn't go anywhere/had bogus size", msg: None});
474 let our_node_id = self.get_our_node_id();
475 for (idx, hop) in route.hops.iter().enumerate() {
476 if idx != route.hops.len() - 1 && hop.pubkey == our_node_id {
477 return Err(HandleError{err: "Route went through us but wasn't a simple rebalance loop to us", msg: None});
481 let session_priv = secp_call!(SecretKey::from_slice(&self.secp_ctx, &{
482 let mut session_key = [0; 32];
483 rng::fill_bytes(&mut session_key);
487 let associated_data = Vec::new(); //TODO: What to put here?
489 let onion_keys = ChannelManager::construct_onion_keys(&self.secp_ctx, &route, &session_priv)?;
490 let (onion_payloads, htlc_msat, htlc_cltv) = ChannelManager::build_onion_payloads(&route)?;
491 let onion_packet = ChannelManager::construct_onion_packet(onion_payloads, onion_keys, associated_data)?;
493 let mut channel_state = self.channel_state.lock().unwrap();
494 let id = match channel_state.short_to_id.get(&route.hops.first().unwrap().short_channel_id) {
495 None => return Err(HandleError{err: "No channel available with first hop!", msg: None}),
496 Some(id) => id.clone()
499 let chan = channel_state.by_id.get_mut(&id).unwrap();
500 if chan.get_their_node_id() != route.hops.first().unwrap().pubkey {
501 return Err(HandleError{err: "Node ID mismatch on first hop!", msg: None});
503 chan.send_htlc_and_commit(htlc_msat, payment_hash.clone(), htlc_cltv, onion_packet)?
506 if channel_state.claimable_htlcs.insert(payment_hash, PendingOutboundHTLC::OutboundRoute {
509 // TODO: We need to track these better, we're not generating these, so a
510 // third-party might make this happen:
511 panic!("payment_hash was repeated! Don't let this happen");
517 /// Call this upon creation of a funding transaction for the given channel.
518 /// Panics if a funding transaction has already been provided for this channel.
519 pub fn funding_transaction_generated(&self, temporary_channel_id: &Uint256, funding_txo: (Sha256dHash, u16)) {
521 let mut channel_state = self.channel_state.lock().unwrap();
522 match channel_state.by_id.remove(&temporary_channel_id) {
524 match chan.get_outbound_funding_created(funding_txo.0, funding_txo.1) {
529 //TODO: Push e to pendingevents
536 }; // Release channel lock for install_watch_outpoint call,
537 let chan_monitor = chan.channel_monitor();
538 match self.monitor.add_update_monitor(chan_monitor.get_funding_txo().unwrap(), chan_monitor) {
541 //TODO: Push e to pendingevents?
547 let mut pending_events = self.pending_events.lock().unwrap();
548 pending_events.push(events::Event::SendFundingCreated {
549 node_id: chan.get_their_node_id(),
554 let mut channel_state = self.channel_state.lock().unwrap();
555 channel_state.by_id.insert(chan.channel_id(), chan);
558 fn get_announcement_sigs(&self, chan: &Channel) -> Result<Option<msgs::AnnouncementSignatures>, HandleError> {
559 if !chan.is_usable() { return Ok(None) }
561 let (announcement, our_bitcoin_sig) = chan.get_channel_announcement(self.get_our_node_id(), self.genesis_hash.clone())?;
562 let msghash = Message::from_slice(&Sha256dHash::from_data(&announcement.encode()[..])[..]).unwrap();
563 let our_node_sig = secp_call!(self.secp_ctx.sign(&msghash, &self.our_network_key));
565 Ok(Some(msgs::AnnouncementSignatures {
566 channel_id: chan.channel_id(),
567 short_channel_id: chan.get_short_channel_id().unwrap(),
568 node_signature: our_node_sig,
569 bitcoin_signature: our_bitcoin_sig,
573 pub fn process_pending_htlc_forward(&self) {
574 let mut new_events = Vec::new();
575 let mut failed_forwards = Vec::new();
577 let mut channel_state_lock = self.channel_state.lock().unwrap();
578 let channel_state = channel_state_lock.borrow_parts();
580 if Instant::now() < *channel_state.next_forward {
584 for (short_chan_id, pending_forwards) in channel_state.forward_htlcs.drain() {
585 if short_chan_id != 0 {
586 let forward_chan_id = match channel_state.short_to_id.get(&short_chan_id) {
587 Some(chan_id) => chan_id.clone(),
589 failed_forwards.reserve(pending_forwards.len());
590 for forward_info in pending_forwards {
591 failed_forwards.push((forward_info.payment_hash, 0x4000 | 10, None));
593 // TODO: Send a failure packet back on each pending_forward
597 let forward_chan = &mut channel_state.by_id.get_mut(&forward_chan_id).unwrap();
599 let mut add_htlc_msgs = Vec::new();
600 for forward_info in pending_forwards {
601 match forward_chan.send_htlc(forward_info.amt_to_forward, forward_info.payment_hash, forward_info.outgoing_cltv_value, forward_info.onion_packet.unwrap()) {
603 let chan_update = self.get_channel_update(forward_chan).unwrap();
604 failed_forwards.push((forward_info.payment_hash, 0x4000 | 7, Some(chan_update)));
609 Some(msg) => { add_htlc_msgs.push(msg); },
611 // Nothing to do here...we're waiting on a remote
612 // revoke_and_ack before we can add anymore HTLCs. The Channel
613 // will automatically handle building the update_add_htlc and
614 // commitment_signed messages when we can.
615 // TODO: Do some kind of timer to set the channel as !is_live()
616 // as we don't really want others relying on us relaying through
617 // this channel currently :/.
624 if !add_htlc_msgs.is_empty() {
625 let commitment_msg = match forward_chan.send_commitment() {
628 //TODO: Handle...this is bad!
632 new_events.push(events::Event::SendHTLCs {
633 node_id: forward_chan.get_their_node_id(),
635 commitment_msg: commitment_msg,
639 for forward_info in pending_forwards {
640 new_events.push(events::Event::PaymentReceived {
641 payment_hash: forward_info.payment_hash,
642 amt: forward_info.amt_to_forward,
649 for failed_forward in failed_forwards.drain(..) {
650 match failed_forward.2 {
651 None => self.fail_htlc_backwards_internal(self.channel_state.lock().unwrap(), &failed_forward.0, HTLCFailReason::Reason { failure_code: failed_forward.1, data: &[0;0] }),
652 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()[..] }),
656 if new_events.is_empty() { return }
658 let mut events = self.pending_events.lock().unwrap();
659 events.reserve(new_events.len());
660 for event in new_events.drain(..) {
665 /// Indicates that the preimage for payment_hash is unknown after a PaymentReceived event.
666 pub fn fail_htlc_backwards(&self, payment_hash: &[u8; 32]) -> bool {
667 self.fail_htlc_backwards_internal(self.channel_state.lock().unwrap(), payment_hash, HTLCFailReason::Reason { failure_code: 0x4000 | 15, data: &[0;0] })
670 fn fail_htlc_backwards_internal(&self, mut channel_state: MutexGuard<ChannelHolder>, payment_hash: &[u8; 32], onion_error: HTLCFailReason) -> bool {
671 let mut pending_htlc = {
672 match channel_state.claimable_htlcs.remove(payment_hash) {
673 Some(pending_htlc) => pending_htlc,
674 None => return false,
679 PendingOutboundHTLC::CycledRoute { source_short_channel_id, incoming_packet_shared_secret, .. } => {
680 pending_htlc = PendingOutboundHTLC::IntermediaryHopData { source_short_channel_id, incoming_packet_shared_secret };
686 PendingOutboundHTLC::CycledRoute { .. } => { panic!("WAT"); },
687 PendingOutboundHTLC::OutboundRoute { .. } => {
688 //TODO: DECRYPT route from OutboundRoute
689 mem::drop(channel_state);
690 let mut pending_events = self.pending_events.lock().unwrap();
691 pending_events.push(events::Event::PaymentFailed {
692 payment_hash: payment_hash.clone()
696 PendingOutboundHTLC::IntermediaryHopData { source_short_channel_id, incoming_packet_shared_secret } => {
697 let err_packet = match onion_error {
698 HTLCFailReason::Reason { failure_code, data } => {
699 let packet = ChannelManager::build_failure_packet(&incoming_packet_shared_secret, failure_code, data).encode();
700 ChannelManager::encrypt_failure_packet(&incoming_packet_shared_secret, &packet)
702 HTLCFailReason::ErrorPacket { err } => {
703 ChannelManager::encrypt_failure_packet(&incoming_packet_shared_secret, &err.data)
707 let (node_id, fail_msg) = {
708 let chan_id = match channel_state.short_to_id.get(&source_short_channel_id) {
709 Some(chan_id) => chan_id.clone(),
713 let chan = channel_state.by_id.get_mut(&chan_id).unwrap();
714 match chan.get_update_fail_htlc(payment_hash, err_packet) {
715 Ok(msg) => (chan.get_their_node_id(), msg),
717 //TODO: Do something with e?
723 mem::drop(channel_state);
724 let mut pending_events = self.pending_events.lock().unwrap();
725 pending_events.push(events::Event::SendFailHTLC {
735 /// Provides a payment preimage in response to a PaymentReceived event, returning true and
736 /// generating message events for the net layer to claim the payment, if possible. Thus, you
737 /// should probably kick the net layer to go send messages if this returns true!
738 pub fn claim_funds(&self, payment_preimage: [u8; 32]) -> bool {
739 self.claim_funds_internal(payment_preimage, true)
741 pub fn claim_funds_internal(&self, payment_preimage: [u8; 32], from_user: bool) -> bool {
742 let mut sha = Sha256::new();
743 sha.input(&payment_preimage);
744 let mut payment_hash = [0; 32];
745 sha.result(&mut payment_hash);
747 let mut channel_state = self.channel_state.lock().unwrap();
748 let mut pending_htlc = {
749 match channel_state.claimable_htlcs.remove(&payment_hash) {
750 Some(pending_htlc) => pending_htlc,
751 None => return false,
756 PendingOutboundHTLC::CycledRoute { source_short_channel_id, incoming_packet_shared_secret, route } => {
757 if from_user { // This was the end hop back to us
758 pending_htlc = PendingOutboundHTLC::IntermediaryHopData { source_short_channel_id, incoming_packet_shared_secret };
759 channel_state.claimable_htlcs.insert(payment_hash, PendingOutboundHTLC::OutboundRoute { route });
760 } else { // This came from the first upstream node
761 // Bank error in our favor! Maybe we should tell the user this somehow???
762 pending_htlc = PendingOutboundHTLC::OutboundRoute { route };
763 channel_state.claimable_htlcs.insert(payment_hash, PendingOutboundHTLC::IntermediaryHopData { source_short_channel_id, incoming_packet_shared_secret });
770 PendingOutboundHTLC::CycledRoute { .. } => { panic!("WAT"); },
771 PendingOutboundHTLC::OutboundRoute { .. } => {
773 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...");
775 mem::drop(channel_state);
776 let mut pending_events = self.pending_events.lock().unwrap();
777 pending_events.push(events::Event::PaymentSent {
782 PendingOutboundHTLC::IntermediaryHopData { source_short_channel_id, .. } => {
783 let (node_id, fulfill_msg) = {
784 let chan_id = match channel_state.short_to_id.get(&source_short_channel_id) {
785 Some(chan_id) => chan_id.clone(),
789 let chan = channel_state.by_id.get_mut(&chan_id).unwrap();
790 match chan.get_update_fulfill_htlc(payment_preimage) {
791 Ok(msg) => (chan.get_their_node_id(), msg),
793 //TODO: Do something with e?
799 mem::drop(channel_state);
800 let mut pending_events = self.pending_events.lock().unwrap();
801 pending_events.push(events::Event::SendFulfillHTLC {
811 /// Gets the node_id held by this ChannelManager
812 pub fn get_our_node_id(&self) -> PublicKey {
813 PublicKey::from_secret_key(&self.secp_ctx, &self.our_network_key).unwrap()
817 impl events::EventsProvider for ChannelManager {
818 fn get_and_clear_pending_events(&self) -> Vec<events::Event> {
819 let mut pending_events = self.pending_events.lock().unwrap();
820 let mut ret = Vec::new();
821 mem::swap(&mut ret, &mut *pending_events);
826 impl ChainListener for ChannelManager {
827 fn block_connected(&self, header: &BlockHeader, height: u32, txn_matched: &[&Transaction], indexes_of_txn_matched: &[u32]) {
828 let mut new_funding_locked_messages = Vec::new();
830 let mut channel_state = self.channel_state.lock().unwrap();
831 let mut short_to_ids_to_insert = Vec::new();
832 for channel in channel_state.by_id.values_mut() {
833 match channel.block_connected(header, height, txn_matched, indexes_of_txn_matched) {
834 Some(funding_locked) => {
835 let announcement_sigs = match self.get_announcement_sigs(channel) {
838 //TODO: push e on events and blow up the channel (it has bad keys)
842 new_funding_locked_messages.push(events::Event::SendFundingLocked {
843 node_id: channel.get_their_node_id(),
845 announcement_sigs: announcement_sigs
847 short_to_ids_to_insert.push((channel.get_short_channel_id().unwrap(), channel.channel_id()));
852 for to_insert in short_to_ids_to_insert {
853 channel_state.short_to_id.insert(to_insert.0, to_insert.1);
856 let mut pending_events = self.pending_events.lock().unwrap();
857 for funding_locked in new_funding_locked_messages.drain(..) {
858 pending_events.push(funding_locked);
862 fn block_disconnected(&self, header: &BlockHeader) {
863 let mut channel_state = self.channel_state.lock().unwrap();
864 for channel in channel_state.by_id.values_mut() {
865 if channel.block_disconnected(header) {
866 //TODO Close channel here
872 impl ChannelMessageHandler for ChannelManager {
873 //TODO: Handle errors and close channel (or so)
874 fn handle_open_channel(&self, their_node_id: &PublicKey, msg: &msgs::OpenChannel) -> Result<msgs::AcceptChannel, HandleError> {
875 if msg.chain_hash != self.genesis_hash {
876 return Err(HandleError{err: "Unknown genesis block hash", msg: None});
878 let mut channel_state = self.channel_state.lock().unwrap();
879 if channel_state.by_id.contains_key(&msg.temporary_channel_id) {
880 return Err(HandleError{err: "temporary_channel_id collision!", msg: None});
882 let channel = Channel::new_from_req(&*self.fee_estimator, their_node_id.clone(), msg, 0, self.announce_channels_publicly)?;
883 let accept_msg = channel.get_accept_channel()?;
884 channel_state.by_id.insert(channel.channel_id(), channel);
888 fn handle_accept_channel(&self, their_node_id: &PublicKey, msg: &msgs::AcceptChannel) -> Result<(), HandleError> {
889 let (value, output_script, user_id) = {
890 let mut channel_state = self.channel_state.lock().unwrap();
891 match channel_state.by_id.get_mut(&msg.temporary_channel_id) {
893 if chan.get_their_node_id() != *their_node_id {
894 return Err(HandleError{err: "Got a message for a channel from the wrong node!", msg: None})
896 chan.accept_channel(&msg)?;
897 (chan.get_value_satoshis(), chan.get_funding_redeemscript().to_v0_p2wsh(), chan.get_user_id())
899 None => return Err(HandleError{err: "Failed to find corresponding channel", msg: None})
902 let mut pending_events = self.pending_events.lock().unwrap();
903 pending_events.push(events::Event::FundingGenerationReady {
904 temporary_channel_id: msg.temporary_channel_id,
905 channel_value_satoshis: value,
906 output_script: output_script,
907 user_channel_id: user_id,
912 fn handle_funding_created(&self, their_node_id: &PublicKey, msg: &msgs::FundingCreated) -> Result<msgs::FundingSigned, HandleError> {
913 //TODO: broke this - a node shouldn't be able to get their channel removed by sending a
914 //funding_created a second time, or long after the first, or whatever (note this also
915 //leaves the short_to_id map in a busted state.
917 let mut channel_state = self.channel_state.lock().unwrap();
918 match channel_state.by_id.remove(&msg.temporary_channel_id) {
920 if chan.get_their_node_id() != *their_node_id {
921 return Err(HandleError{err: "Got a message for a channel from the wrong node!", msg: None})
923 match chan.funding_created(msg) {
932 None => return Err(HandleError{err: "Failed to find corresponding channel", msg: None})
934 }; // Release channel lock for install_watch_outpoint call,
935 // note that this means if the remote end is misbehaving and sends a message for the same
936 // channel back-to-back with funding_created, we'll end up thinking they sent a message
937 // for a bogus channel.
938 let chan_monitor = chan.0.channel_monitor();
939 self.monitor.add_update_monitor(chan_monitor.get_funding_txo().unwrap(), chan_monitor)?;
940 let mut channel_state = self.channel_state.lock().unwrap();
941 channel_state.by_id.insert(chan.1.channel_id, chan.0);
945 fn handle_funding_signed(&self, their_node_id: &PublicKey, msg: &msgs::FundingSigned) -> Result<(), HandleError> {
946 let (funding_txo, user_id) = {
947 let mut channel_state = self.channel_state.lock().unwrap();
948 match channel_state.by_id.get_mut(&msg.channel_id) {
950 if chan.get_their_node_id() != *their_node_id {
951 return Err(HandleError{err: "Got a message for a channel from the wrong node!", msg: None})
953 chan.funding_signed(&msg)?;
954 (chan.get_funding_txo().unwrap(), chan.get_user_id())
956 None => return Err(HandleError{err: "Failed to find corresponding channel", msg: None})
959 let mut pending_events = self.pending_events.lock().unwrap();
960 pending_events.push(events::Event::FundingBroadcastSafe {
961 funding_txo: funding_txo,
962 user_channel_id: user_id,
967 fn handle_funding_locked(&self, their_node_id: &PublicKey, msg: &msgs::FundingLocked) -> Result<Option<msgs::AnnouncementSignatures>, HandleError> {
968 let mut channel_state = self.channel_state.lock().unwrap();
969 match channel_state.by_id.get_mut(&msg.channel_id) {
971 if chan.get_their_node_id() != *their_node_id {
972 return Err(HandleError{err: "Got a message for a channel from the wrong node!", msg: None})
974 chan.funding_locked(&msg)?;
975 return Ok(self.get_announcement_sigs(chan)?);
977 None => return Err(HandleError{err: "Failed to find corresponding channel", msg: None})
981 fn handle_shutdown(&self, _their_node_id: &PublicKey, _msg: &msgs::Shutdown) -> Result<(), HandleError> {
985 fn handle_closing_signed(&self, _their_node_id: &PublicKey, _msg: &msgs::ClosingSigned) -> Result<(), HandleError> {
989 fn handle_update_add_htlc(&self, their_node_id: &PublicKey, msg: &msgs::UpdateAddHTLC) -> Result<(), msgs::HandleError> {
990 //TODO: BOLT 4 points out a specific attack where a peer may re-send an onion packet and
991 //determine the state of the payment based on our response/if we forward anything/the time
992 //we take to respond. We should take care to avoid allowing such an attack.
994 //TODO: There exists a further attack where a node may garble the onion data, forward it to
995 //us repeatedly garbled in different ways, and compare our error messages, which are
996 //encrypted with the same key. Its not immediately obvious how to usefully exploit that,
997 //but we should prevent it anyway.
999 let shared_secret = SharedSecret::new(&self.secp_ctx, &msg.onion_routing_packet.public_key, &self.our_network_key);
1000 let (rho, mu) = ChannelManager::gen_rho_mu_from_shared_secret(&shared_secret);
1002 let associated_data = Vec::new(); //TODO: What to put here?
1004 macro_rules! get_onion_hash {
1007 let mut sha = Sha256::new();
1008 sha.input(&msg.onion_routing_packet.hop_data);
1009 let mut onion_hash = [0; 32];
1010 sha.result(&mut onion_hash);
1016 macro_rules! return_err {
1017 ($msg: expr, $err_code: expr, $data: expr) => {
1018 return Err(msgs::HandleError {
1020 msg: Some(msgs::ErrorMessage::UpdateFailHTLC {
1021 msg: msgs::UpdateFailHTLC {
1022 channel_id: msg.channel_id,
1023 htlc_id: msg.htlc_id,
1024 reason: ChannelManager::build_first_hop_failure_packet(&shared_secret, $err_code, $data),
1031 if msg.onion_routing_packet.version != 0 {
1032 //TODO: Spec doesn't indicate if we should only hash hop_data here (and in other
1033 //sha256_of_onion error data packets), or the entire onion_routing_packet. Either way,
1034 //the hash doesn't really serve any purpuse - in the case of hashing all data, the
1035 //receiving node would have to brute force to figure out which version was put in the
1036 //packet by the node that send us the message, in the case of hashing the hop_data, the
1037 //node knows the HMAC matched, so they already know what is there...
1038 return_err!("Unknown onion packet version", 0x8000 | 0x4000 | 4, &get_onion_hash!());
1041 let mut hmac = Hmac::new(Sha256::new(), &mu);
1042 hmac.input(&msg.onion_routing_packet.hop_data);
1043 hmac.input(&associated_data[..]);
1044 if hmac.result() != MacResult::new(&msg.onion_routing_packet.hmac) {
1045 return_err!("HMAC Check failed", 0x8000 | 0x4000 | 5, &get_onion_hash!());
1048 let mut chacha = ChaCha20::new(&rho, &[0u8; 8]);
1049 let next_hop_data = {
1050 let mut decoded = [0; 65];
1051 chacha.process(&msg.onion_routing_packet.hop_data[0..65], &mut decoded);
1052 match msgs::OnionHopData::decode(&decoded[..]) {
1054 let error_code = match err {
1055 msgs::DecodeError::UnknownRealmByte => 0x4000 | 1,
1056 _ => 0x2000 | 2, // Should never happen
1058 return_err!("Unable to decode our hop data", error_code, &[0;0]);
1064 let mut pending_forward_info = if next_hop_data.hmac == [0; 32] {
1066 if next_hop_data.data.amt_to_forward != msg.amount_msat {
1067 return_err!("Upstream node sent less than we were supposed to receive in payment", 19, &byte_utils::be64_to_array(msg.amount_msat));
1069 if next_hop_data.data.outgoing_cltv_value != msg.cltv_expiry {
1070 return_err!("Upstream node set CLTV to the wrong value", 18, &byte_utils::be32_to_array(msg.cltv_expiry));
1073 // Note that we could obviously respond immediately with an update_fulfill_htlc
1074 // message, however that would leak that we are the recipient of this payment, so
1075 // instead we stay symmetric with the forwarding case, only responding (after a
1076 // delay) once they've send us a commitment_signed!
1078 PendingForwardHTLCInfo {
1080 payment_hash: msg.payment_hash.clone(),
1081 short_channel_id: 0,
1082 prev_short_channel_id: 0,
1083 amt_to_forward: next_hop_data.data.amt_to_forward,
1084 outgoing_cltv_value: next_hop_data.data.outgoing_cltv_value,
1087 let mut new_packet_data = [0; 20*65];
1088 chacha.process(&msg.onion_routing_packet.hop_data[65..], &mut new_packet_data[0..19*65]);
1089 chacha.process(&ChannelManager::ZERO[0..65], &mut new_packet_data[19*65..]);
1091 let mut new_pubkey = msg.onion_routing_packet.public_key.clone();
1093 let blinding_factor = {
1094 let mut sha = Sha256::new();
1095 sha.input(&new_pubkey.serialize()[..]);
1096 sha.input(&shared_secret[..]);
1097 let mut res = [0u8; 32];
1098 sha.result(&mut res);
1099 match SecretKey::from_slice(&self.secp_ctx, &res) {
1101 // Return temporary node failure as its technically our issue, not the
1103 return_err!("Blinding factor is an invalid private key", 0x2000 | 2, &[0;0]);
1109 match new_pubkey.mul_assign(&self.secp_ctx, &blinding_factor) {
1111 // Return temporary node failure as its technically our issue, not the
1113 return_err!("New blinding factor is an invalid private key", 0x2000 | 2, &[0;0]);
1118 let outgoing_packet = msgs::OnionPacket {
1120 public_key: new_pubkey,
1121 hop_data: new_packet_data,
1122 hmac: next_hop_data.hmac.clone(),
1125 //TODO: Check amt_to_forward and outgoing_cltv_value are within acceptable ranges!
1127 PendingForwardHTLCInfo {
1128 onion_packet: Some(outgoing_packet),
1129 payment_hash: msg.payment_hash.clone(),
1130 short_channel_id: next_hop_data.data.short_channel_id,
1131 prev_short_channel_id: 0,
1132 amt_to_forward: next_hop_data.data.amt_to_forward,
1133 outgoing_cltv_value: next_hop_data.data.outgoing_cltv_value,
1137 let mut channel_state_lock = self.channel_state.lock().unwrap();
1138 let channel_state = channel_state_lock.borrow_parts();
1140 if pending_forward_info.onion_packet.is_some() { // If short_channel_id is 0 here, we'll reject them in the body here
1141 let forwarding_id = match channel_state.short_to_id.get(&pending_forward_info.short_channel_id) {
1143 return_err!("Don't have available channel for forwarding as requested.", 0x4000 | 10, &[0;0]);
1145 Some(id) => id.clone(),
1147 let chan = channel_state.by_id.get_mut(&forwarding_id).unwrap();
1148 if !chan.is_live() {
1149 let chan_update = self.get_channel_update(chan).unwrap();
1150 return_err!("Forwarding channel is not in a ready state.", 0x4000 | 10, &chan_update.encode()[..]);
1154 let claimable_htlcs_entry = channel_state.claimable_htlcs.entry(msg.payment_hash.clone());
1156 // We dont correctly handle payments that route through us twice on their way to their
1157 // destination. That's OK since those nodes are probably busted or trying to do network
1158 // mapping through repeated loops. In either case, we want them to stop talking to us, so
1159 // we send permanent_node_failure.
1160 match &claimable_htlcs_entry {
1161 &hash_map::Entry::Occupied(ref e) => {
1162 let mut acceptable_cycle = false;
1164 &PendingOutboundHTLC::OutboundRoute { .. } => {
1165 acceptable_cycle = pending_forward_info.short_channel_id == 0;
1169 if !acceptable_cycle {
1170 return_err!("Payment looped through us twice", 0x4000 | 0x2000 | 2, &[0;0]);
1176 let (source_short_channel_id, res) = match channel_state.by_id.get_mut(&msg.channel_id) {
1178 if chan.get_their_node_id() != *their_node_id {
1179 return Err(HandleError{err: "Got a message for a channel from the wrong node!", msg: None})
1181 if !chan.is_usable() {
1182 return Err(HandleError{err: "Channel not yet available for receiving HTLCs", msg: None});
1184 let short_channel_id = chan.get_short_channel_id().unwrap();
1185 pending_forward_info.prev_short_channel_id = short_channel_id;
1186 (short_channel_id, chan.update_add_htlc(&msg, pending_forward_info)?)
1188 None => return Err(HandleError{err: "Failed to find corresponding channel", msg: None}), //TODO: panic?
1191 match claimable_htlcs_entry {
1192 hash_map::Entry::Occupied(mut e) => {
1193 let outbound_route = e.get_mut();
1194 let route = match outbound_route {
1195 &mut PendingOutboundHTLC::OutboundRoute { ref route } => {
1198 _ => { panic!("WAT") },
1200 *outbound_route = PendingOutboundHTLC::CycledRoute {
1201 source_short_channel_id,
1202 incoming_packet_shared_secret: shared_secret,
1206 hash_map::Entry::Vacant(e) => {
1207 e.insert(PendingOutboundHTLC::IntermediaryHopData {
1208 source_short_channel_id,
1209 incoming_packet_shared_secret: shared_secret,
1217 fn handle_update_fulfill_htlc(&self, their_node_id: &PublicKey, msg: &msgs::UpdateFulfillHTLC) -> Result<(), HandleError> {
1219 let mut channel_state = self.channel_state.lock().unwrap();
1220 match channel_state.by_id.get_mut(&msg.channel_id) {
1222 if chan.get_their_node_id() != *their_node_id {
1223 return Err(HandleError{err: "Got a message for a channel from the wrong node!", msg: None})
1225 chan.update_fulfill_htlc(&msg)?;
1227 None => return Err(HandleError{err: "Failed to find corresponding channel", msg: None})
1230 //TODO: Delay the claimed_funds relaying just like we do outbound relay!
1231 self.claim_funds_internal(msg.payment_preimage.clone(), false);
1235 fn handle_update_fail_htlc(&self, their_node_id: &PublicKey, msg: &msgs::UpdateFailHTLC) -> Result<(), HandleError> {
1236 let mut channel_state = self.channel_state.lock().unwrap();
1237 let payment_hash = match channel_state.by_id.get_mut(&msg.channel_id) {
1239 if chan.get_their_node_id() != *their_node_id {
1240 return Err(HandleError{err: "Got a message for a channel from the wrong node!", msg: None})
1242 chan.update_fail_htlc(&msg)?
1244 None => return Err(HandleError{err: "Failed to find corresponding channel", msg: None})
1246 self.fail_htlc_backwards_internal(channel_state, &payment_hash, HTLCFailReason::ErrorPacket { err: &msg.reason });
1250 fn handle_update_fail_malformed_htlc(&self, their_node_id: &PublicKey, msg: &msgs::UpdateFailMalformedHTLC) -> Result<(), HandleError> {
1251 let mut channel_state = self.channel_state.lock().unwrap();
1252 let payment_hash = match channel_state.by_id.get_mut(&msg.channel_id) {
1254 if chan.get_their_node_id() != *their_node_id {
1255 return Err(HandleError{err: "Got a message for a channel from the wrong node!", msg: None})
1257 chan.update_fail_malformed_htlc(&msg)?
1259 None => return Err(HandleError{err: "Failed to find corresponding channel", msg: None})
1261 self.fail_htlc_backwards_internal(channel_state, &payment_hash, HTLCFailReason::Reason { failure_code: msg.failure_code, data: &[0;0] });
1265 fn handle_commitment_signed(&self, their_node_id: &PublicKey, msg: &msgs::CommitmentSigned) -> Result<msgs::RevokeAndACK, HandleError> {
1266 let mut forward_event = None;
1267 let (res, monitor) = {
1268 let mut channel_state = self.channel_state.lock().unwrap();
1270 let ((res, mut forwarding_infos), monitor) = match channel_state.by_id.get_mut(&msg.channel_id) {
1272 if chan.get_their_node_id() != *their_node_id {
1273 return Err(HandleError{err: "Got a message for a channel from the wrong node!", msg: None})
1275 (chan.commitment_signed(&msg)?, chan.channel_monitor())
1277 None => return Err(HandleError{err: "Failed to find corresponding channel", msg: None})
1280 if channel_state.forward_htlcs.is_empty() {
1281 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));
1282 channel_state.next_forward = forward_event.unwrap();
1284 for forward_info in forwarding_infos.drain(..) {
1285 match channel_state.forward_htlcs.entry(forward_info.short_channel_id) {
1286 hash_map::Entry::Occupied(mut entry) => {
1287 entry.get_mut().push(forward_info);
1289 hash_map::Entry::Vacant(entry) => {
1290 entry.insert(vec!(forward_info));
1297 //TODO: Only if we store HTLC sigs
1298 self.monitor.add_update_monitor(monitor.get_funding_txo().unwrap(), monitor)?;
1300 match forward_event {
1302 let mut pending_events = self.pending_events.lock().unwrap();
1303 pending_events.push(events::Event::PendingHTLCsForwardable {
1304 time_forwardable: time
1313 fn handle_revoke_and_ack(&self, their_node_id: &PublicKey, msg: &msgs::RevokeAndACK) -> Result<Option<(Vec<msgs::UpdateAddHTLC>, msgs::CommitmentSigned)>, HandleError> {
1314 let (res, monitor) = {
1315 let mut channel_state = self.channel_state.lock().unwrap();
1316 match channel_state.by_id.get_mut(&msg.channel_id) {
1318 if chan.get_their_node_id() != *their_node_id {
1319 return Err(HandleError{err: "Got a message for a channel from the wrong node!", msg: None})
1321 (chan.revoke_and_ack(&msg)?, chan.channel_monitor())
1323 None => return Err(HandleError{err: "Failed to find corresponding channel", msg: None})
1326 self.monitor.add_update_monitor(monitor.get_funding_txo().unwrap(), monitor)?;
1330 fn handle_update_fee(&self, their_node_id: &PublicKey, msg: &msgs::UpdateFee) -> Result<(), HandleError> {
1331 let mut channel_state = self.channel_state.lock().unwrap();
1332 match channel_state.by_id.get_mut(&msg.channel_id) {
1334 if chan.get_their_node_id() != *their_node_id {
1335 return Err(HandleError{err: "Got a message for a channel from the wrong node!", msg: None})
1337 chan.update_fee(&*self.fee_estimator, &msg)
1339 None => return Err(HandleError{err: "Failed to find corresponding channel", msg: None})
1343 fn handle_announcement_signatures(&self, their_node_id: &PublicKey, msg: &msgs::AnnouncementSignatures) -> Result<(), HandleError> {
1344 let (chan_announcement, chan_update) = {
1345 let mut channel_state = self.channel_state.lock().unwrap();
1346 match channel_state.by_id.get_mut(&msg.channel_id) {
1348 if chan.get_their_node_id() != *their_node_id {
1349 return Err(HandleError{err: "Got a message for a channel from the wrong node!", msg: None})
1351 if !chan.is_usable() {
1352 return Err(HandleError{err: "Got an announcement_signatures before we were ready for it", msg: None });
1355 let our_node_id = self.get_our_node_id();
1356 let (announcement, our_bitcoin_sig) = chan.get_channel_announcement(our_node_id.clone(), self.genesis_hash.clone())?;
1358 let were_node_one = announcement.node_id_1 == our_node_id;
1359 let msghash = Message::from_slice(&Sha256dHash::from_data(&announcement.encode()[..])[..]).unwrap();
1360 secp_call!(self.secp_ctx.verify(&msghash, &msg.node_signature, if were_node_one { &announcement.node_id_2 } else { &announcement.node_id_1 }));
1361 secp_call!(self.secp_ctx.verify(&msghash, &msg.bitcoin_signature, if were_node_one { &announcement.bitcoin_key_2 } else { &announcement.bitcoin_key_1 }));
1363 let our_node_sig = secp_call!(self.secp_ctx.sign(&msghash, &self.our_network_key));
1365 (msgs::ChannelAnnouncement {
1366 node_signature_1: if were_node_one { our_node_sig } else { msg.node_signature },
1367 node_signature_2: if were_node_one { msg.node_signature } else { our_node_sig },
1368 bitcoin_signature_1: if were_node_one { our_bitcoin_sig } else { msg.bitcoin_signature },
1369 bitcoin_signature_2: if were_node_one { msg.bitcoin_signature } else { our_bitcoin_sig },
1370 contents: announcement,
1371 }, self.get_channel_update(chan).unwrap()) // can only fail if we're not in a ready state
1373 None => return Err(HandleError{err: "Failed to find corresponding channel", msg: None})
1376 let mut pending_events = self.pending_events.lock().unwrap();
1377 pending_events.push(events::Event::BroadcastChannelAnnouncement { msg: chan_announcement, update_msg: chan_update });
1384 use chain::chaininterface;
1385 use ln::channelmanager::{ChannelManager,OnionKeys};
1386 use ln::router::{Route, RouteHop, Router};
1388 use ln::msgs::{MsgEncodable,ChannelMessageHandler,RoutingMessageHandler};
1389 use util::test_utils;
1390 use util::events::{Event, EventsProvider};
1392 use bitcoin::util::misc::hex_bytes;
1393 use bitcoin::util::hash::Sha256dHash;
1394 use bitcoin::blockdata::block::BlockHeader;
1395 use bitcoin::blockdata::transaction::Transaction;
1396 use bitcoin::network::constants::Network;
1397 use bitcoin::network::serialize::serialize;
1398 use bitcoin::network::serialize::BitcoinHash;
1400 use secp256k1::Secp256k1;
1401 use secp256k1::key::{PublicKey,SecretKey};
1403 use crypto::sha2::Sha256;
1404 use crypto::digest::Digest;
1406 use rand::{thread_rng,Rng};
1409 use std::default::Default;
1410 use std::time::Instant;
1412 fn build_test_onion_keys() -> Vec<OnionKeys> {
1413 // Keys from BOLT 4, used in both test vector tests
1414 let secp_ctx = Secp256k1::new();
1419 pubkey: PublicKey::from_slice(&secp_ctx, &hex_bytes("02eec7245d6b7d2ccb30380bfbe2a3648cd7a942653f5aa340edcea1f283686619").unwrap()[..]).unwrap(),
1420 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
1423 pubkey: PublicKey::from_slice(&secp_ctx, &hex_bytes("0324653eac434488002cc06bbfb7f10fe18991e35f9fe4302dbea6d2353dc0ab1c").unwrap()[..]).unwrap(),
1424 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
1427 pubkey: PublicKey::from_slice(&secp_ctx, &hex_bytes("027f31ebc5462c1fdce1b737ecff52d37d75dea43ce11c74d25aa297165faa2007").unwrap()[..]).unwrap(),
1428 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
1431 pubkey: PublicKey::from_slice(&secp_ctx, &hex_bytes("032c0b7cf95324a07d05398b240174dc0c2be444d96b159aa6c7f7b1e668680991").unwrap()[..]).unwrap(),
1432 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
1435 pubkey: PublicKey::from_slice(&secp_ctx, &hex_bytes("02edabbd16b41c8371b92ef2f04c1185b4f03b6dcd52ba9b78d9d7c89c8f221145").unwrap()[..]).unwrap(),
1436 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
1441 let session_priv = SecretKey::from_slice(&secp_ctx, &hex_bytes("4141414141414141414141414141414141414141414141414141414141414141").unwrap()[..]).unwrap();
1443 let onion_keys = ChannelManager::construct_onion_keys(&secp_ctx, &route, &session_priv).unwrap();
1444 assert_eq!(onion_keys.len(), route.hops.len());
1449 fn onion_vectors() {
1450 // Packet creation test vectors from BOLT 4
1451 let onion_keys = build_test_onion_keys();
1453 assert_eq!(onion_keys[0].shared_secret[..], hex_bytes("53eb63ea8a3fec3b3cd433b85cd62a4b145e1dda09391b348c4e1cd36a03ea66").unwrap()[..]);
1454 assert_eq!(onion_keys[0].blinding_factor[..], hex_bytes("2ec2e5da605776054187180343287683aa6a51b4b1c04d6dd49c45d8cffb3c36").unwrap()[..]);
1455 assert_eq!(onion_keys[0].ephemeral_pubkey.serialize()[..], hex_bytes("02eec7245d6b7d2ccb30380bfbe2a3648cd7a942653f5aa340edcea1f283686619").unwrap()[..]);
1456 assert_eq!(onion_keys[0].rho, hex_bytes("ce496ec94def95aadd4bec15cdb41a740c9f2b62347c4917325fcc6fb0453986").unwrap()[..]);
1457 assert_eq!(onion_keys[0].mu, hex_bytes("b57061dc6d0a2b9f261ac410c8b26d64ac5506cbba30267a649c28c179400eba").unwrap()[..]);
1459 assert_eq!(onion_keys[1].shared_secret[..], hex_bytes("a6519e98832a0b179f62123b3567c106db99ee37bef036e783263602f3488fae").unwrap()[..]);
1460 assert_eq!(onion_keys[1].blinding_factor[..], hex_bytes("bf66c28bc22e598cfd574a1931a2bafbca09163df2261e6d0056b2610dab938f").unwrap()[..]);
1461 assert_eq!(onion_keys[1].ephemeral_pubkey.serialize()[..], hex_bytes("028f9438bfbf7feac2e108d677e3a82da596be706cc1cf342b75c7b7e22bf4e6e2").unwrap()[..]);
1462 assert_eq!(onion_keys[1].rho, hex_bytes("450ffcabc6449094918ebe13d4f03e433d20a3d28a768203337bc40b6e4b2c59").unwrap()[..]);
1463 assert_eq!(onion_keys[1].mu, hex_bytes("05ed2b4a3fb023c2ff5dd6ed4b9b6ea7383f5cfe9d59c11d121ec2c81ca2eea9").unwrap()[..]);
1465 assert_eq!(onion_keys[2].shared_secret[..], hex_bytes("3a6b412548762f0dbccce5c7ae7bb8147d1caf9b5471c34120b30bc9c04891cc").unwrap()[..]);
1466 assert_eq!(onion_keys[2].blinding_factor[..], hex_bytes("a1f2dadd184eb1627049673f18c6325814384facdee5bfd935d9cb031a1698a5").unwrap()[..]);
1467 assert_eq!(onion_keys[2].ephemeral_pubkey.serialize()[..], hex_bytes("03bfd8225241ea71cd0843db7709f4c222f62ff2d4516fd38b39914ab6b83e0da0").unwrap()[..]);
1468 assert_eq!(onion_keys[2].rho, hex_bytes("11bf5c4f960239cb37833936aa3d02cea82c0f39fd35f566109c41f9eac8deea").unwrap()[..]);
1469 assert_eq!(onion_keys[2].mu, hex_bytes("caafe2820fa00eb2eeb78695ae452eba38f5a53ed6d53518c5c6edf76f3f5b78").unwrap()[..]);
1471 assert_eq!(onion_keys[3].shared_secret[..], hex_bytes("21e13c2d7cfe7e18836df50872466117a295783ab8aab0e7ecc8c725503ad02d").unwrap()[..]);
1472 assert_eq!(onion_keys[3].blinding_factor[..], hex_bytes("7cfe0b699f35525029ae0fa437c69d0f20f7ed4e3916133f9cacbb13c82ff262").unwrap()[..]);
1473 assert_eq!(onion_keys[3].ephemeral_pubkey.serialize()[..], hex_bytes("031dde6926381289671300239ea8e57ffaf9bebd05b9a5b95beaf07af05cd43595").unwrap()[..]);
1474 assert_eq!(onion_keys[3].rho, hex_bytes("cbe784ab745c13ff5cffc2fbe3e84424aa0fd669b8ead4ee562901a4a4e89e9e").unwrap()[..]);
1475 assert_eq!(onion_keys[3].mu, hex_bytes("5052aa1b3d9f0655a0932e50d42f0c9ba0705142c25d225515c45f47c0036ee9").unwrap()[..]);
1477 assert_eq!(onion_keys[4].shared_secret[..], hex_bytes("b5756b9b542727dbafc6765a49488b023a725d631af688fc031217e90770c328").unwrap()[..]);
1478 assert_eq!(onion_keys[4].blinding_factor[..], hex_bytes("c96e00dddaf57e7edcd4fb5954be5b65b09f17cb6d20651b4e90315be5779205").unwrap()[..]);
1479 assert_eq!(onion_keys[4].ephemeral_pubkey.serialize()[..], hex_bytes("03a214ebd875aab6ddfd77f22c5e7311d7f77f17a169e599f157bbcdae8bf071f4").unwrap()[..]);
1480 assert_eq!(onion_keys[4].rho, hex_bytes("034e18b8cc718e8af6339106e706c52d8df89e2b1f7e9142d996acf88df8799b").unwrap()[..]);
1481 assert_eq!(onion_keys[4].mu, hex_bytes("8e45e5c61c2b24cb6382444db6698727afb063adecd72aada233d4bf273d975a").unwrap()[..]);
1483 // Test vectors below are flat-out wrong: they claim to set outgoing_cltv_value to non-0 :/
1484 let payloads = vec!(
1485 msgs::OnionHopData {
1487 data: msgs::OnionRealm0HopData {
1488 short_channel_id: 0,
1490 outgoing_cltv_value: 0,
1494 msgs::OnionHopData {
1496 data: msgs::OnionRealm0HopData {
1497 short_channel_id: 0x0101010101010101,
1498 amt_to_forward: 0x0100000001,
1499 outgoing_cltv_value: 0,
1503 msgs::OnionHopData {
1505 data: msgs::OnionRealm0HopData {
1506 short_channel_id: 0x0202020202020202,
1507 amt_to_forward: 0x0200000002,
1508 outgoing_cltv_value: 0,
1512 msgs::OnionHopData {
1514 data: msgs::OnionRealm0HopData {
1515 short_channel_id: 0x0303030303030303,
1516 amt_to_forward: 0x0300000003,
1517 outgoing_cltv_value: 0,
1521 msgs::OnionHopData {
1523 data: msgs::OnionRealm0HopData {
1524 short_channel_id: 0x0404040404040404,
1525 amt_to_forward: 0x0400000004,
1526 outgoing_cltv_value: 0,
1532 let packet = ChannelManager::construct_onion_packet(payloads, onion_keys, hex_bytes("4242424242424242424242424242424242424242424242424242424242424242").unwrap()).unwrap();
1533 // Just check the final packet encoding, as it includes all the per-hop vectors in it
1535 assert_eq!(packet.encode(), hex_bytes("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").unwrap());
1539 fn test_failure_packet_onion() {
1540 // Returning Errors test vectors from BOLT 4
1542 let onion_keys = build_test_onion_keys();
1543 let onion_error = ChannelManager::build_failure_packet(&onion_keys[4].shared_secret, 0x2002, &[0; 0]);
1544 assert_eq!(onion_error.encode(), hex_bytes("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").unwrap());
1546 let onion_packet_1 = ChannelManager::encrypt_failure_packet(&onion_keys[4].shared_secret, &onion_error.encode()[..]);
1547 assert_eq!(onion_packet_1.data, hex_bytes("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").unwrap());
1549 let onion_packet_2 = ChannelManager::encrypt_failure_packet(&onion_keys[3].shared_secret, &onion_packet_1.data[..]);
1550 assert_eq!(onion_packet_2.data, hex_bytes("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").unwrap());
1552 let onion_packet_3 = ChannelManager::encrypt_failure_packet(&onion_keys[2].shared_secret, &onion_packet_2.data[..]);
1553 assert_eq!(onion_packet_3.data, hex_bytes("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").unwrap());
1555 let onion_packet_4 = ChannelManager::encrypt_failure_packet(&onion_keys[1].shared_secret, &onion_packet_3.data[..]);
1556 assert_eq!(onion_packet_4.data, hex_bytes("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").unwrap());
1558 let onion_packet_5 = ChannelManager::encrypt_failure_packet(&onion_keys[0].shared_secret, &onion_packet_4.data[..]);
1559 assert_eq!(onion_packet_5.data, hex_bytes("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").unwrap());
1562 static mut CHAN_COUNT: u16 = 0;
1563 fn confirm_transaction(chain: &chaininterface::ChainWatchInterfaceUtil, tx: &Transaction) {
1564 let mut header = BlockHeader { version: 0x20000000, prev_blockhash: Default::default(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
1565 let chan_id = unsafe { CHAN_COUNT };
1566 chain.block_connected_checked(&header, 1, &[tx; 1], &[chan_id as u32; 1]);
1568 header = BlockHeader { version: 0x20000000, prev_blockhash: header.bitcoin_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
1569 chain.block_connected_checked(&header, i, &[tx; 0], &[0; 0]);
1573 fn create_chan_between_nodes(node_a: &ChannelManager, chain_a: &chaininterface::ChainWatchInterfaceUtil, node_b: &ChannelManager, chain_b: &chaininterface::ChainWatchInterfaceUtil) -> (msgs::ChannelAnnouncement, msgs::ChannelUpdate, msgs::ChannelUpdate) {
1574 let open_chan = node_a.create_channel(node_b.get_our_node_id(), 100000, 42).unwrap();
1575 let accept_chan = node_b.handle_open_channel(&node_a.get_our_node_id(), &open_chan).unwrap();
1576 node_a.handle_accept_channel(&node_b.get_our_node_id(), &accept_chan).unwrap();
1578 let chan_id = unsafe { CHAN_COUNT };
1579 let tx = Transaction { version: chan_id as u32, lock_time: 0, input: Vec::new(), output: Vec::new() };
1580 let funding_output = (Sha256dHash::from_data(&serialize(&tx).unwrap()[..]), chan_id);
1582 let events_1 = node_a.get_and_clear_pending_events();
1583 assert_eq!(events_1.len(), 1);
1585 Event::FundingGenerationReady { ref temporary_channel_id, ref channel_value_satoshis, output_script: _, user_channel_id } => {
1586 assert_eq!(*channel_value_satoshis, 100000);
1587 assert_eq!(user_channel_id, 42);
1589 node_a.funding_transaction_generated(&temporary_channel_id, funding_output.clone());
1590 //TODO: Check that we got added to chan_monitor_a!
1592 _ => panic!("Unexpected event"),
1595 let events_2 = node_a.get_and_clear_pending_events();
1596 assert_eq!(events_2.len(), 1);
1597 let funding_signed = match events_2[0] {
1598 Event::SendFundingCreated { ref node_id, ref msg } => {
1599 assert_eq!(*node_id, node_b.get_our_node_id());
1600 node_b.handle_funding_created(&node_a.get_our_node_id(), msg).unwrap()
1601 //TODO: Check that we got added to chan_monitor_b!
1603 _ => panic!("Unexpected event"),
1606 node_a.handle_funding_signed(&node_b.get_our_node_id(), &funding_signed).unwrap();
1608 let events_3 = node_a.get_and_clear_pending_events();
1609 assert_eq!(events_3.len(), 1);
1611 Event::FundingBroadcastSafe { ref funding_txo, user_channel_id } => {
1612 assert_eq!(user_channel_id, 42);
1613 assert_eq!(*funding_txo, funding_output);
1615 _ => panic!("Unexpected event"),
1618 confirm_transaction(&chain_a, &tx);
1619 let events_4 = node_a.get_and_clear_pending_events();
1620 assert_eq!(events_4.len(), 1);
1622 Event::SendFundingLocked { ref node_id, ref msg, ref announcement_sigs } => {
1623 assert_eq!(*node_id, node_b.get_our_node_id());
1624 assert!(announcement_sigs.is_none());
1625 node_b.handle_funding_locked(&node_a.get_our_node_id(), msg).unwrap()
1627 _ => panic!("Unexpected event"),
1630 confirm_transaction(&chain_b, &tx);
1631 let events_5 = node_b.get_and_clear_pending_events();
1632 assert_eq!(events_5.len(), 1);
1633 let as_announcement_sigs = match events_5[0] {
1634 Event::SendFundingLocked { ref node_id, ref msg, ref announcement_sigs } => {
1635 assert_eq!(*node_id, node_a.get_our_node_id());
1636 let as_announcement_sigs = node_a.handle_funding_locked(&node_b.get_our_node_id(), msg).unwrap().unwrap();
1637 node_a.handle_announcement_signatures(&node_b.get_our_node_id(), &(*announcement_sigs).clone().unwrap()).unwrap();
1638 as_announcement_sigs
1640 _ => panic!("Unexpected event"),
1643 let events_6 = node_a.get_and_clear_pending_events();
1644 assert_eq!(events_6.len(), 1);
1645 let (announcement, as_update) = match events_6[0] {
1646 Event::BroadcastChannelAnnouncement { ref msg, ref update_msg } => {
1649 _ => panic!("Unexpected event"),
1652 node_b.handle_announcement_signatures(&node_a.get_our_node_id(), &as_announcement_sigs).unwrap();
1653 let events_7 = node_b.get_and_clear_pending_events();
1654 assert_eq!(events_7.len(), 1);
1655 let bs_update = match events_7[0] {
1656 Event::BroadcastChannelAnnouncement { ref msg, ref update_msg } => {
1657 assert!(*announcement == *msg);
1660 _ => panic!("Unexpected event"),
1667 ((*announcement).clone(), (*as_update).clone(), (*bs_update).clone())
1672 msgs: Vec<msgs::UpdateAddHTLC>,
1673 commitment_msg: msgs::CommitmentSigned,
1676 fn from_event(event: Event) -> SendEvent {
1678 Event::SendHTLCs { node_id, msgs, commitment_msg } => {
1679 SendEvent { node_id: node_id, msgs: msgs, commitment_msg: commitment_msg }
1681 _ => panic!("Unexpected event type!"),
1686 static mut PAYMENT_COUNT: u8 = 0;
1687 fn send_along_route(origin_node: &ChannelManager, route: Route, expected_route: &[&ChannelManager], recv_value: u64) -> ([u8; 32], [u8; 32]) {
1688 let our_payment_preimage = unsafe { [PAYMENT_COUNT; 32] };
1689 unsafe { PAYMENT_COUNT += 1 };
1690 let our_payment_hash = {
1691 let mut sha = Sha256::new();
1692 sha.input(&our_payment_preimage[..]);
1693 let mut ret = [0; 32];
1694 sha.result(&mut ret);
1698 let mut payment_event = {
1699 let msgs = origin_node.send_payment(route, our_payment_hash).unwrap().unwrap();
1701 node_id: expected_route[0].get_our_node_id(),
1703 commitment_msg: msgs.1,
1706 let mut prev_node = origin_node;
1708 for (idx, node) in expected_route.iter().enumerate() {
1709 assert_eq!(node.get_our_node_id(), payment_event.node_id);
1711 node.handle_update_add_htlc(&prev_node.get_our_node_id(), &payment_event.msgs[0]).unwrap();
1712 let revoke_and_ack = node.handle_commitment_signed(&prev_node.get_our_node_id(), &payment_event.commitment_msg).unwrap();
1713 assert!(prev_node.handle_revoke_and_ack(&node.get_our_node_id(), &revoke_and_ack).unwrap().is_none());
1715 let events_1 = node.get_and_clear_pending_events();
1716 assert_eq!(events_1.len(), 1);
1718 Event::PendingHTLCsForwardable { .. } => { },
1719 _ => panic!("Unexpected event"),
1722 node.channel_state.lock().unwrap().next_forward = Instant::now();
1723 node.process_pending_htlc_forward();
1725 let mut events_2 = node.get_and_clear_pending_events();
1726 assert_eq!(events_2.len(), 1);
1727 if idx == expected_route.len() - 1 {
1729 Event::PaymentReceived { ref payment_hash, amt } => {
1730 assert_eq!(our_payment_hash, *payment_hash);
1731 assert_eq!(amt, recv_value);
1733 _ => panic!("Unexpected event"),
1736 for event in events_2.drain(..) {
1737 payment_event = SendEvent::from_event(event);
1739 assert_eq!(payment_event.msgs.len(), 1);
1745 (our_payment_preimage, our_payment_hash)
1748 fn claim_payment(origin_node: &ChannelManager, expected_route: &[&ChannelManager], our_payment_preimage: [u8; 32]) {
1749 assert!(expected_route.last().unwrap().claim_funds(our_payment_preimage));
1751 let mut expected_next_node = expected_route.last().unwrap().get_our_node_id();
1752 let mut prev_node = expected_route.last().unwrap();
1753 let mut next_msg = None;
1754 for node in expected_route.iter().rev() {
1755 assert_eq!(expected_next_node, node.get_our_node_id());
1758 node.handle_update_fulfill_htlc(&prev_node.get_our_node_id(), &msg).unwrap();
1762 let events = node.get_and_clear_pending_events();
1763 assert_eq!(events.len(), 1);
1765 Event::SendFulfillHTLC { ref node_id, ref msg } => {
1766 expected_next_node = node_id.clone();
1767 next_msg = Some(msg.clone());
1769 _ => panic!("Unexpected event"),
1775 assert_eq!(expected_next_node, origin_node.get_our_node_id());
1776 origin_node.handle_update_fulfill_htlc(&expected_route.first().unwrap().get_our_node_id(), &next_msg.unwrap()).unwrap();
1778 let events = origin_node.get_and_clear_pending_events();
1779 assert_eq!(events.len(), 1);
1781 Event::PaymentSent { payment_preimage } => {
1782 assert_eq!(payment_preimage, our_payment_preimage);
1784 _ => panic!("Unexpected event"),
1788 fn route_payment(origin_node: &ChannelManager, origin_router: &Router, expected_route: &[&ChannelManager], recv_value: u64) -> ([u8; 32], [u8; 32]) {
1789 let route = origin_router.get_route(&expected_route.last().unwrap().get_our_node_id(), &Vec::new(), recv_value, 142).unwrap();
1790 assert_eq!(route.hops.len(), expected_route.len());
1791 for (node, hop) in expected_route.iter().zip(route.hops.iter()) {
1792 assert_eq!(hop.pubkey, node.get_our_node_id());
1795 send_along_route(origin_node, route, expected_route, recv_value)
1798 fn route_over_limit(origin_node: &ChannelManager, origin_router: &Router, expected_route: &[&ChannelManager], recv_value: u64) {
1799 let route = origin_router.get_route(&expected_route.last().unwrap().get_our_node_id(), &Vec::new(), recv_value, 142).unwrap();
1800 assert_eq!(route.hops.len(), expected_route.len());
1801 for (node, hop) in expected_route.iter().zip(route.hops.iter()) {
1802 assert_eq!(hop.pubkey, node.get_our_node_id());
1805 let our_payment_preimage = unsafe { [PAYMENT_COUNT; 32] };
1806 unsafe { PAYMENT_COUNT += 1 };
1807 let our_payment_hash = {
1808 let mut sha = Sha256::new();
1809 sha.input(&our_payment_preimage[..]);
1810 let mut ret = [0; 32];
1811 sha.result(&mut ret);
1815 let err = origin_node.send_payment(route, our_payment_hash).err().unwrap();
1816 assert_eq!(err.err, "Cannot send value that would put us over our max HTLC value in flight");
1819 fn send_payment(origin_node: &ChannelManager, origin_router: &Router, expected_route: &[&ChannelManager], recv_value: u64) {
1820 let our_payment_preimage = route_payment(origin_node, origin_router, expected_route, recv_value).0;
1821 claim_payment(origin_node, expected_route, our_payment_preimage);
1824 fn send_failed_payment(origin_node: &ChannelManager, origin_router: &Router, expected_route: &[&ChannelManager]) {
1825 let route = origin_router.get_route(&expected_route.last().unwrap().get_our_node_id(), &Vec::new(), 1000000, 142).unwrap();
1826 assert_eq!(route.hops.len(), expected_route.len());
1827 for (node, hop) in expected_route.iter().zip(route.hops.iter()) {
1828 assert_eq!(hop.pubkey, node.get_our_node_id());
1830 let our_payment_hash = send_along_route(origin_node, route, expected_route, 1000000).1;
1832 assert!(expected_route.last().unwrap().fail_htlc_backwards(&our_payment_hash));
1834 let mut expected_next_node = expected_route.last().unwrap().get_our_node_id();
1835 let mut prev_node = expected_route.last().unwrap();
1836 let mut next_msg = None;
1837 for node in expected_route.iter().rev() {
1838 assert_eq!(expected_next_node, node.get_our_node_id());
1841 node.handle_update_fail_htlc(&prev_node.get_our_node_id(), &msg).unwrap();
1845 let events = node.get_and_clear_pending_events();
1846 assert_eq!(events.len(), 1);
1848 Event::SendFailHTLC { ref node_id, ref msg } => {
1849 expected_next_node = node_id.clone();
1850 next_msg = Some(msg.clone());
1852 _ => panic!("Unexpected event"),
1858 assert_eq!(expected_next_node, origin_node.get_our_node_id());
1859 origin_node.handle_update_fail_htlc(&expected_route.first().unwrap().get_our_node_id(), &next_msg.unwrap()).unwrap();
1861 let events = origin_node.get_and_clear_pending_events();
1862 assert_eq!(events.len(), 1);
1864 Event::PaymentFailed { payment_hash } => {
1865 assert_eq!(payment_hash, our_payment_hash);
1867 _ => panic!("Unexpected event"),
1872 fn fake_network_test() {
1873 // Simple test which builds a network of ChannelManagers, connects them to each other, and
1874 // tests that payments get routed and transactions broadcast in semi-reasonable ways.
1875 let mut rng = thread_rng();
1876 let secp_ctx = Secp256k1::new();
1878 let feeest_1 = Arc::new(test_utils::TestFeeEstimator { sat_per_vbyte: 1 });
1879 let chain_monitor_1 = Arc::new(chaininterface::ChainWatchInterfaceUtil::new());
1880 let chan_monitor_1 = Arc::new(test_utils::TestChannelMonitor{});
1882 let mut key_slice = [0; 32];
1883 rng.fill_bytes(&mut key_slice);
1884 SecretKey::from_slice(&secp_ctx, &key_slice).unwrap()
1886 let node_1 = ChannelManager::new(node_id_1.clone(), 0, true, Network::Testnet, feeest_1.clone(), chan_monitor_1.clone(), chain_monitor_1.clone()).unwrap();
1887 let router_1 = Router::new(PublicKey::from_secret_key(&secp_ctx, &node_id_1).unwrap());
1889 let feeest_2 = Arc::new(test_utils::TestFeeEstimator { sat_per_vbyte: 1 });
1890 let chain_monitor_2 = Arc::new(chaininterface::ChainWatchInterfaceUtil::new());
1891 let chan_monitor_2 = Arc::new(test_utils::TestChannelMonitor{});
1893 let mut key_slice = [0; 32];
1894 rng.fill_bytes(&mut key_slice);
1895 SecretKey::from_slice(&secp_ctx, &key_slice).unwrap()
1897 let node_2 = ChannelManager::new(node_id_2.clone(), 0, true, Network::Testnet, feeest_2.clone(), chan_monitor_2.clone(), chain_monitor_2.clone()).unwrap();
1898 let router_2 = Router::new(PublicKey::from_secret_key(&secp_ctx, &node_id_2).unwrap());
1900 let feeest_3 = Arc::new(test_utils::TestFeeEstimator { sat_per_vbyte: 1 });
1901 let chain_monitor_3 = Arc::new(chaininterface::ChainWatchInterfaceUtil::new());
1902 let chan_monitor_3 = Arc::new(test_utils::TestChannelMonitor{});
1904 let mut key_slice = [0; 32];
1905 rng.fill_bytes(&mut key_slice);
1906 SecretKey::from_slice(&secp_ctx, &key_slice).unwrap()
1908 let node_3 = ChannelManager::new(node_id_3.clone(), 0, true, Network::Testnet, feeest_3.clone(), chan_monitor_3.clone(), chain_monitor_3.clone()).unwrap();
1909 let router_3 = Router::new(PublicKey::from_secret_key(&secp_ctx, &node_id_3).unwrap());
1911 let feeest_4 = Arc::new(test_utils::TestFeeEstimator { sat_per_vbyte: 1 });
1912 let chain_monitor_4 = Arc::new(chaininterface::ChainWatchInterfaceUtil::new());
1913 let chan_monitor_4 = Arc::new(test_utils::TestChannelMonitor{});
1915 let mut key_slice = [0; 32];
1916 rng.fill_bytes(&mut key_slice);
1917 SecretKey::from_slice(&secp_ctx, &key_slice).unwrap()
1919 let node_4 = ChannelManager::new(node_id_4.clone(), 0, true, Network::Testnet, feeest_4.clone(), chan_monitor_4.clone(), chain_monitor_4.clone()).unwrap();
1920 let router_4 = Router::new(PublicKey::from_secret_key(&secp_ctx, &node_id_4).unwrap());
1922 // Create some initial channels
1923 let chan_announcement_1 = create_chan_between_nodes(&node_1, &chain_monitor_1, &node_2, &chain_monitor_2);
1924 for router in vec!(&router_1, &router_2, &router_3, &router_4) {
1925 assert!(router.handle_channel_announcement(&chan_announcement_1.0).unwrap());
1926 router.handle_channel_update(&chan_announcement_1.1).unwrap();
1927 router.handle_channel_update(&chan_announcement_1.2).unwrap();
1929 let chan_announcement_2 = create_chan_between_nodes(&node_2, &chain_monitor_2, &node_3, &chain_monitor_3);
1930 for router in vec!(&router_1, &router_2, &router_3, &router_4) {
1931 assert!(router.handle_channel_announcement(&chan_announcement_2.0).unwrap());
1932 router.handle_channel_update(&chan_announcement_2.1).unwrap();
1933 router.handle_channel_update(&chan_announcement_2.2).unwrap();
1935 let chan_announcement_3 = create_chan_between_nodes(&node_3, &chain_monitor_3, &node_4, &chain_monitor_4);
1936 for router in vec!(&router_1, &router_2, &router_3, &router_4) {
1937 assert!(router.handle_channel_announcement(&chan_announcement_3.0).unwrap());
1938 router.handle_channel_update(&chan_announcement_3.1).unwrap();
1939 router.handle_channel_update(&chan_announcement_3.2).unwrap();
1942 // Rebalance the network a bit by relaying one payment through all the channels...
1943 send_payment(&node_1, &router_1, &vec!(&*node_2, &*node_3, &*node_4)[..], 8000000);
1944 send_payment(&node_1, &router_1, &vec!(&*node_2, &*node_3, &*node_4)[..], 8000000);
1945 send_payment(&node_1, &router_1, &vec!(&*node_2, &*node_3, &*node_4)[..], 8000000);
1946 send_payment(&node_1, &router_1, &vec!(&*node_2, &*node_3, &*node_4)[..], 8000000);
1947 send_payment(&node_1, &router_1, &vec!(&*node_2, &*node_3, &*node_4)[..], 8000000);
1949 // Send some more payments
1950 send_payment(&node_2, &router_2, &vec!(&*node_3, &*node_4)[..], 1000000);
1951 send_payment(&node_4, &router_4, &vec!(&*node_3, &*node_2, &*node_1)[..], 1000000);
1952 send_payment(&node_4, &router_4, &vec!(&*node_3, &*node_2)[..], 1000000);
1954 // Test failure packets
1955 send_failed_payment(&node_1, &router_1, &vec!(&*node_2, &*node_3, &*node_4)[..]);
1957 // Add a new channel that skips 3
1958 let chan_announcement_4 = create_chan_between_nodes(&node_2, &chain_monitor_2, &node_4, &chain_monitor_4);
1959 for router in vec!(&router_1, &router_2, &router_3, &router_4) {
1960 assert!(router.handle_channel_announcement(&chan_announcement_4.0).unwrap());
1961 router.handle_channel_update(&chan_announcement_4.1).unwrap();
1962 router.handle_channel_update(&chan_announcement_4.2).unwrap();
1965 send_payment(&node_1, &router_1, &vec!(&*node_2, &*node_4)[..], 1000000);
1966 send_payment(&node_3, &router_3, &vec!(&*node_4)[..], 1000000);
1967 send_payment(&node_2, &router_2, &vec!(&*node_4)[..], 8000000);
1968 send_payment(&node_2, &router_2, &vec!(&*node_4)[..], 8000000);
1969 send_payment(&node_2, &router_2, &vec!(&*node_4)[..], 8000000);
1970 send_payment(&node_2, &router_2, &vec!(&*node_4)[..], 8000000);
1971 send_payment(&node_2, &router_2, &vec!(&*node_4)[..], 8000000);
1973 // Do some rebalance loop payments, simultaneously
1974 let mut hops = Vec::with_capacity(3);
1975 hops.push(RouteHop {
1976 pubkey: node_3.get_our_node_id(),
1977 short_channel_id: chan_announcement_2.1.contents.short_channel_id,
1979 cltv_expiry_delta: chan_announcement_3.1.contents.cltv_expiry_delta as u32
1981 hops.push(RouteHop {
1982 pubkey: node_4.get_our_node_id(),
1983 short_channel_id: chan_announcement_3.1.contents.short_channel_id,
1985 cltv_expiry_delta: chan_announcement_4.2.contents.cltv_expiry_delta as u32
1987 hops.push(RouteHop {
1988 pubkey: node_2.get_our_node_id(),
1989 short_channel_id: chan_announcement_4.1.contents.short_channel_id,
1991 cltv_expiry_delta: 142,
1993 hops[1].fee_msat = chan_announcement_4.2.contents.fee_base_msat as u64 + chan_announcement_4.2.contents.fee_proportional_millionths as u64 * hops[2].fee_msat as u64 / 1000000;
1994 hops[0].fee_msat = chan_announcement_3.1.contents.fee_base_msat as u64 + chan_announcement_3.1.contents.fee_proportional_millionths as u64 * hops[1].fee_msat as u64 / 1000000;
1995 let payment_preimage_1 = send_along_route(&node_2, Route { hops }, &vec!(&*node_3, &*node_4, &*node_2)[..], 1000000).0;
1997 let mut hops = Vec::with_capacity(3);
1998 hops.push(RouteHop {
1999 pubkey: node_4.get_our_node_id(),
2000 short_channel_id: chan_announcement_4.1.contents.short_channel_id,
2002 cltv_expiry_delta: chan_announcement_3.2.contents.cltv_expiry_delta as u32
2004 hops.push(RouteHop {
2005 pubkey: node_3.get_our_node_id(),
2006 short_channel_id: chan_announcement_3.1.contents.short_channel_id,
2008 cltv_expiry_delta: chan_announcement_2.2.contents.cltv_expiry_delta as u32
2010 hops.push(RouteHop {
2011 pubkey: node_2.get_our_node_id(),
2012 short_channel_id: chan_announcement_2.1.contents.short_channel_id,
2014 cltv_expiry_delta: 142,
2016 hops[1].fee_msat = chan_announcement_2.2.contents.fee_base_msat as u64 + chan_announcement_2.2.contents.fee_proportional_millionths as u64 * hops[2].fee_msat as u64 / 1000000;
2017 hops[0].fee_msat = chan_announcement_3.2.contents.fee_base_msat as u64 + chan_announcement_3.2.contents.fee_proportional_millionths as u64 * hops[1].fee_msat as u64 / 1000000;
2018 let payment_preimage_2 = send_along_route(&node_2, Route { hops }, &vec!(&*node_4, &*node_3, &*node_2)[..], 1000000).0;
2020 // Claim the rebalances...
2021 claim_payment(&node_2, &vec!(&*node_4, &*node_3, &*node_2)[..], payment_preimage_2);
2022 claim_payment(&node_2, &vec!(&*node_3, &*node_4, &*node_2)[..], payment_preimage_1);
2024 // Add a duplicate new channel from 2 to 4
2025 let chan_announcement_5 = create_chan_between_nodes(&node_2, &chain_monitor_2, &node_4, &chain_monitor_4);
2026 for router in vec!(&router_1, &router_2, &router_3, &router_4) {
2027 assert!(router.handle_channel_announcement(&chan_announcement_5.0).unwrap());
2028 router.handle_channel_update(&chan_announcement_5.1).unwrap();
2029 router.handle_channel_update(&chan_announcement_5.2).unwrap();
2032 // Send some payments across both channels
2033 let payment_preimage_3 = route_payment(&node_1, &router_1, &vec!(&*node_2, &*node_4)[..], 3000000).0;
2034 let payment_preimage_4 = route_payment(&node_1, &router_1, &vec!(&*node_2, &*node_4)[..], 3000000).0;
2035 let payment_preimage_5 = route_payment(&node_1, &router_1, &vec!(&*node_2, &*node_4)[..], 3000000).0;
2037 route_over_limit(&node_1, &router_1, &vec!(&*node_2, &*node_4)[..], 3000000);
2039 //TODO: Test that routes work again here as we've been notified that the channel is full
2041 claim_payment(&node_1, &vec!(&*node_2, &*node_4)[..], payment_preimage_3);
2042 claim_payment(&node_1, &vec!(&*node_2, &*node_4)[..], payment_preimage_4);
2043 claim_payment(&node_1, &vec!(&*node_2, &*node_4)[..], payment_preimage_5);
2045 // Check that we processed all pending events
2046 for node in vec!(&node_1, &node_2, &node_3, &node_4) {
2047 assert_eq!(node.get_and_clear_pending_events().len(), 0);