_ Git - rust-lightning/blob - src/ln/channelmanager.rs

   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
   8 use secp256k1::key::{SecretKey,PublicKey};
   9 use secp256k1::{Secp256k1,Message};
  10 use secp256k1::ecdh::SharedSecret;
  11 use secp256k1;
  12
  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};
  18 use ln::msgs;
  19 use ln::msgs::{HandleError,ChannelMessageHandler,MsgEncodable,MsgDecodable};
  20 use util::{byte_utils, events, internal_traits, rng};
  21 use util::sha2::Sha256;
  22
  23 use crypto;
  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;
  29
  30 use std::{ptr, mem};
  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};
  36
  37 mod channel_held_info {
  38         use ln::msgs;
  39
  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,
  48         }
  49
  50         #[cfg(feature = "fuzztarget")]
  51         impl PendingForwardHTLCInfo {
  52                 pub fn dummy() -> Self {
  53                         Self {
  54                                 onion_packet: None,
  55                                 payment_hash: [0; 32],
  56                                 short_channel_id: 0,
  57                                 prev_short_channel_id: 0,
  58                                 amt_to_forward: 0,
  59                                 outgoing_cltv_value: 0,
  60                         }
  61                 }
  62         }
  63
  64         #[derive(Clone)] // See Channel::revoke_and_ack for why, tl;dr: Rust bug
  65         pub enum HTLCFailReason {
  66                 ErrorPacket {
  67                         err: msgs::OnionErrorPacket,
  68                 },
  69                 Reason {
  70                         failure_code: u16,
  71                         data: Vec<u8>,
  72                 }
  73         }
  74
  75         #[cfg(feature = "fuzztarget")]
  76         impl HTLCFailReason {
  77                 pub fn dummy() -> Self {
  78                         HTLCFailReason::Reason {
  79                                 failure_code: 0, data: Vec::new(),
  80                         }
  81                 }
  82         }
  83 }
  84 #[cfg(feature = "fuzztarget")]
  85 pub use self::channel_held_info::*;
  86 #[cfg(not(feature = "fuzztarget"))]
  87 pub(crate) use self::channel_held_info::*;
  88
  89 enum PendingOutboundHTLC {
  90         IntermediaryHopData {
  91                 source_short_channel_id: u64,
  92                 incoming_packet_shared_secret: SharedSecret,
  93         },
  94         OutboundRoute {
  95                 route: Route,
  96                 session_priv: SecretKey,
  97         },
  98         /// Used for channel rebalancing
  99         CycledRoute {
 100                 source_short_channel_id: u64,
 101                 incoming_packet_shared_secret: SharedSecret,
 102                 route: Route,
 103                 session_priv: SecretKey,
 104         }
 105 }
 106
 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;
 112
 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         forward_htlcs: HashMap<u64, Vec<PendingForwardHTLCInfo>>,
 119         claimable_htlcs: HashMap<[u8; 32], PendingOutboundHTLC>,
 120 }
 121 struct MutChannelHolder<'a> {
 122         by_id: &'a mut HashMap<[u8; 32], Channel>,
 123         short_to_id: &'a mut HashMap<u64, [u8; 32]>,
 124         next_forward: &'a mut Instant,
 125         /// short channel id -> forward infos. Key of 0 means payments received
 126         forward_htlcs: &'a mut HashMap<u64, Vec<PendingForwardHTLCInfo>>,
 127         claimable_htlcs: &'a mut HashMap<[u8; 32], PendingOutboundHTLC>,
 128 }
 129 impl ChannelHolder {
 130         fn borrow_parts(&mut self) -> MutChannelHolder {
 131                 MutChannelHolder {
 132                         by_id: &mut self.by_id,
 133                         short_to_id: &mut self.short_to_id,
 134                         next_forward: &mut self.next_forward,
 135                         /// short channel id -> forward infos. Key of 0 means payments received
 136                         forward_htlcs: &mut self.forward_htlcs,
 137                         claimable_htlcs: &mut self.claimable_htlcs,
 138                 }
 139         }
 140 }
 141
 142 /// Manager which keeps track of a number of channels and sends messages to the appropriate
 143 /// channel, also tracking HTLC preimages and forwarding onion packets appropriately.
 144 /// Implements ChannelMessageHandler, handling the multi-channel parts and passing things through
 145 /// to individual Channels.
 146 pub struct ChannelManager {
 147         genesis_hash: Sha256dHash,
 148         fee_estimator: Arc<FeeEstimator>,
 149         monitor: Arc<ManyChannelMonitor>,
 150         chain_monitor: Arc<ChainWatchInterface>,
 151         tx_broadcaster: Arc<BroadcasterInterface>,
 152
 153         announce_channels_publicly: bool,
 154         fee_proportional_millionths: u32,
 155         latest_block_height: AtomicUsize, //TODO: Compile-time assert this is at least 32-bits long
 156         secp_ctx: Secp256k1,
 157
 158         channel_state: Mutex<ChannelHolder>,
 159         our_network_key: SecretKey,
 160
 161         pending_events: Mutex<Vec<events::Event>>,
 162 }
 163
 164 const CLTV_EXPIRY_DELTA: u16 = 6 * 24 * 2; //TODO?
 165
 166 macro_rules! secp_call {
 167         ( $res : expr ) => {
 168                 match $res {
 169                         Ok(key) => key,
 170                         //TODO: Make the err a parameter!
 171                         Err(_) => return Err(HandleError{err: "Key error", action: None})
 172                 }
 173         };
 174 }
 175
 176 struct OnionKeys {
 177         #[cfg(test)]
 178         shared_secret: SharedSecret,
 179         #[cfg(test)]
 180         blinding_factor: [u8; 32],
 181         ephemeral_pubkey: PublicKey,
 182         rho: [u8; 32],
 183         mu: [u8; 32],
 184 }
 185
 186 pub struct ChannelDetails {
 187         /// The channel's ID (prior to funding transaction generation, this is a random 32 bytes,
 188         /// thereafter this is the txid of the funding transaction xor the funding transaction output).
 189         /// Note that this means this value is *not* persistent - it can change once during the
 190         /// lifetime of the channel.
 191         pub channel_id: [u8; 32],
 192         /// The position of the funding transaction in the chain. None if the funding transaction has
 193         /// not yet been confirmed and the channel fully opened.
 194         pub short_channel_id: Option<u64>,
 195         pub remote_network_id: PublicKey,
 196         pub channel_value_satoshis: u64,
 197         /// The user_id passed in to create_channel, or 0 if the channel was inbound.
 198         pub user_id: u64,
 199 }
 200
 201 impl ChannelManager {
 202         /// Constructs a new ChannelManager to hold several channels and route between them. This is
 203         /// the main "logic hub" for all channel-related actions, and implements ChannelMessageHandler.
 204         /// fee_proportional_millionths is an optional fee to charge any payments routed through us.
 205         /// Non-proportional fees are fixed according to our risk using the provided fee estimator.
 206         /// panics if channel_value_satoshis is >= `MAX_FUNDING_SATOSHIS`!
 207         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> {
 208                 let secp_ctx = Secp256k1::new();
 209
 210                 let res = Arc::new(ChannelManager {
 211                         genesis_hash: genesis_block(network).header.bitcoin_hash(),
 212                         fee_estimator: feeest.clone(),
 213                         monitor: monitor.clone(),
 214                         chain_monitor,
 215                         tx_broadcaster,
 216
 217                         announce_channels_publicly,
 218                         fee_proportional_millionths,
 219                         latest_block_height: AtomicUsize::new(0), //TODO: Get an init value (generally need to replay recent chain on chain_monitor registration)
 220                         secp_ctx,
 221
 222                         channel_state: Mutex::new(ChannelHolder{
 223                                 by_id: HashMap::new(),
 224                                 short_to_id: HashMap::new(),
 225                                 next_forward: Instant::now(),
 226                                 forward_htlcs: HashMap::new(),
 227                                 claimable_htlcs: HashMap::new(),
 228                         }),
 229                         our_network_key,
 230
 231                         pending_events: Mutex::new(Vec::new()),
 232                 });
 233                 let weak_res = Arc::downgrade(&res);
 234                 res.chain_monitor.register_listener(weak_res);
 235                 Ok(res)
 236         }
 237
 238         /// Creates a new outbound channel to the given remote node and with the given value.
 239         /// user_id will be provided back as user_channel_id in FundingGenerationReady and
 240         /// FundingBroadcastSafe events to allow tracking of which events correspond with which
 241         /// create_channel call. Note that user_channel_id defaults to 0 for inbound channels, so you
 242         /// may wish to avoid using 0 for user_id here.
 243         /// If successful, will generate a SendOpenChannel event, so you should probably poll
 244         /// PeerManager::process_events afterwards.
 245         pub fn create_channel(&self, their_network_key: PublicKey, channel_value_satoshis: u64, user_id: u64) -> Result<(), HandleError> {
 246                 let chan_keys = if cfg!(feature = "fuzztarget") {
 247                         ChannelKeys {
 248                                 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(),
 249                                 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(),
 250                                 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(),
 251                                 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(),
 252                                 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(),
 253                                 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(),
 254                                 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(),
 255                                 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],
 256                         }
 257                 } else {
 258                         let mut key_seed = [0u8; 32];
 259                         rng::fill_bytes(&mut key_seed);
 260                         match ChannelKeys::new_from_seed(&key_seed) {
 261                                 Ok(key) => key,
 262                                 Err(_) => panic!("RNG is busted!")
 263                         }
 264                 };
 265
 266                 let channel = Channel::new_outbound(&*self.fee_estimator, chan_keys, their_network_key, channel_value_satoshis, self.announce_channels_publicly, user_id);
 267                 let res = channel.get_open_channel(self.genesis_hash.clone(), &*self.fee_estimator)?;
 268                 let mut channel_state = self.channel_state.lock().unwrap();
 269                 match channel_state.by_id.insert(channel.channel_id(), channel) {
 270                         Some(_) => panic!("RNG is bad???"),
 271                         None => {}
 272                 }
 273
 274                 let mut events = self.pending_events.lock().unwrap();
 275                 events.push(events::Event::SendOpenChannel {
 276                         node_id: their_network_key,
 277                         msg: res,
 278                 });
 279                 Ok(())
 280         }
 281
 282         /// Gets the list of open channels, in random order. See ChannelDetail field documentation for
 283         /// more information.
 284         pub fn list_channels(&self) -> Vec<ChannelDetails> {
 285                 let channel_state = self.channel_state.lock().unwrap();
 286                 let mut res = Vec::with_capacity(channel_state.by_id.len());
 287                 for (channel_id, channel) in channel_state.by_id.iter() {
 288                         res.push(ChannelDetails {
 289                                 channel_id: (*channel_id).clone(),
 290                                 short_channel_id: channel.get_short_channel_id(),
 291                                 remote_network_id: channel.get_their_node_id(),
 292                                 channel_value_satoshis: channel.get_value_satoshis(),
 293                                 user_id: channel.get_user_id(),
 294                         });
 295                 }
 296                 res
 297         }
 298
 299         /// Gets the list of usable channels, in random order. Useful as an argument to
 300         /// Router::get_route to ensure non-announced channels are used.
 301         pub fn list_usable_channels(&self) -> Vec<ChannelDetails> {
 302                 let channel_state = self.channel_state.lock().unwrap();
 303                 let mut res = Vec::with_capacity(channel_state.by_id.len());
 304                 for (channel_id, channel) in channel_state.by_id.iter() {
 305                         if channel.is_usable() {
 306                                 res.push(ChannelDetails {
 307                                         channel_id: (*channel_id).clone(),
 308                                         short_channel_id: channel.get_short_channel_id(),
 309                                         remote_network_id: channel.get_their_node_id(),
 310                                         channel_value_satoshis: channel.get_value_satoshis(),
 311                                         user_id: channel.get_user_id(),
 312                                 });
 313                         }
 314                 }
 315                 res
 316         }
 317
 318         /// Begins the process of closing a channel. After this call (plus some timeout), no new HTLCs
 319         /// will be accepted on the given channel, and after additional timeout/the closing of all
 320         /// pending HTLCs, the channel will be closed on chain.
 321         /// May generate a SendShutdown event on success, which should be relayed.
 322         pub fn close_channel(&self, channel_id: &[u8; 32]) -> Result<(), HandleError> {
 323                 let (res, node_id, chan_option) = {
 324                         let mut channel_state_lock = self.channel_state.lock().unwrap();
 325                         let channel_state = channel_state_lock.borrow_parts();
 326                         match channel_state.by_id.entry(channel_id.clone()) {
 327                                 hash_map::Entry::Occupied(mut chan_entry) => {
 328                                         let res = chan_entry.get_mut().get_shutdown()?;
 329                                         if chan_entry.get().is_shutdown() {
 330                                                 if let Some(short_id) = chan_entry.get().get_short_channel_id() {
 331                                                         channel_state.short_to_id.remove(&short_id);
 332                                                 }
 333                                                 (res, chan_entry.get().get_their_node_id(), Some(chan_entry.remove_entry().1))
 334                                         } else { (res, chan_entry.get().get_their_node_id(), None) }
 335                                 },
 336                                 hash_map::Entry::Vacant(_) => return Err(HandleError{err: "No such channel", action: None})
 337                         }
 338                 };
 339                 for payment_hash in res.1 {
 340                         // unknown_next_peer...I dunno who that is anymore....
 341                         self.fail_htlc_backwards_internal(self.channel_state.lock().unwrap(), &payment_hash, HTLCFailReason::Reason { failure_code: 0x4000 | 10, data: Vec::new() });
 342                 }
 343                 let chan_update = if let Some(chan) = chan_option {
 344                         if let Ok(update) = self.get_channel_update(&chan) {
 345                                 Some(update)
 346                         } else { None }
 347                 } else { None };
 348
 349                 let mut events = self.pending_events.lock().unwrap();
 350                 if let Some(update) = chan_update {
 351                         events.push(events::Event::BroadcastChannelUpdate {
 352                                 msg: update
 353                         });
 354                 }
 355                 events.push(events::Event::SendShutdown {
 356                         node_id,
 357                         msg: res.0
 358                 });
 359
 360                 Ok(())
 361         }
 362
 363         #[inline]
 364         fn gen_rho_mu_from_shared_secret(shared_secret: &SharedSecret) -> ([u8; 32], [u8; 32]) {
 365                 ({
 366                         let mut hmac = Hmac::new(Sha256::new(), &[0x72, 0x68, 0x6f]); // rho
 367                         hmac.input(&shared_secret[..]);
 368                         let mut res = [0; 32];
 369                         hmac.raw_result(&mut res);
 370                         res
 371                 },
 372                 {
 373                         let mut hmac = Hmac::new(Sha256::new(), &[0x6d, 0x75]); // mu
 374                         hmac.input(&shared_secret[..]);
 375                         let mut res = [0; 32];
 376                         hmac.raw_result(&mut res);
 377                         res
 378                 })
 379         }
 380
 381         #[inline]
 382         fn gen_um_from_shared_secret(shared_secret: &SharedSecret) -> [u8; 32] {
 383                 let mut hmac = Hmac::new(Sha256::new(), &[0x75, 0x6d]); // um
 384                 hmac.input(&shared_secret[..]);
 385                 let mut res = [0; 32];
 386                 hmac.raw_result(&mut res);
 387                 res
 388         }
 389
 390         #[inline]
 391         fn gen_ammag_from_shared_secret(shared_secret: &SharedSecret) -> [u8; 32] {
 392                 let mut hmac = Hmac::new(Sha256::new(), &[0x61, 0x6d, 0x6d, 0x61, 0x67]); // ammag
 393                 hmac.input(&shared_secret[..]);
 394                 let mut res = [0; 32];
 395                 hmac.raw_result(&mut res);
 396                 res
 397         }
 398
 399         // can only fail if an intermediary hop has an invalid public key or session_priv is invalid
 400         #[inline]
 401         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> {
 402                 let mut blinded_priv = session_priv.clone();
 403                 let mut blinded_pub = secp_call!(PublicKey::from_secret_key(secp_ctx, &blinded_priv));
 404                 let mut first_iteration = true;
 405
 406                 for hop in route.hops.iter() {
 407                         let shared_secret = SharedSecret::new(secp_ctx, &hop.pubkey, &blinded_priv);
 408
 409                         let mut sha = Sha256::new();
 410                         sha.input(&blinded_pub.serialize()[..]);
 411                         sha.input(&shared_secret[..]);
 412                         let mut blinding_factor = [0u8; 32];
 413                         sha.result(&mut blinding_factor);
 414
 415                         if first_iteration {
 416                                 blinded_pub = secp_call!(PublicKey::from_secret_key(secp_ctx, &blinded_priv));
 417                                 first_iteration = false;
 418                         }
 419                         let ephemeral_pubkey = blinded_pub;
 420
 421                         secp_call!(blinded_priv.mul_assign(secp_ctx, &secp_call!(SecretKey::from_slice(secp_ctx, &blinding_factor))));
 422                         blinded_pub = secp_call!(PublicKey::from_secret_key(secp_ctx, &blinded_priv));
 423
 424                         callback(shared_secret, blinding_factor, ephemeral_pubkey, hop);
 425                 }
 426
 427                 Ok(())
 428         }
 429
 430         // can only fail if an intermediary hop has an invalid public key or session_priv is invalid
 431         fn construct_onion_keys(secp_ctx: &Secp256k1, route: &Route, session_priv: &SecretKey) -> Result<Vec<OnionKeys>, HandleError> {
 432                 let mut res = Vec::with_capacity(route.hops.len());
 433
 434                 Self::construct_onion_keys_callback(secp_ctx, route, session_priv, |shared_secret, _blinding_factor, ephemeral_pubkey, _| {
 435                         let (rho, mu) = ChannelManager::gen_rho_mu_from_shared_secret(&shared_secret);
 436
 437                         res.push(OnionKeys {
 438                                 #[cfg(test)]
 439                                 shared_secret,
 440                                 #[cfg(test)]
 441                                 blinding_factor: _blinding_factor,
 442                                 ephemeral_pubkey,
 443                                 rho,
 444                                 mu,
 445                         });
 446                 })?;
 447
 448                 Ok(res)
 449         }
 450
 451         /// returns the hop data, as well as the first-hop value_msat and CLTV value we should send.
 452         fn build_onion_payloads(route: &Route, starting_htlc_offset: u32) -> Result<(Vec<msgs::OnionHopData>, u64, u32), HandleError> {
 453                 let mut cur_value_msat = 0u64;
 454                 let mut cur_cltv = starting_htlc_offset;
 455                 let mut last_short_channel_id = 0;
 456                 let mut res: Vec<msgs::OnionHopData> = Vec::with_capacity(route.hops.len());
 457                 internal_traits::test_no_dealloc::<msgs::OnionHopData>(None);
 458                 unsafe { res.set_len(route.hops.len()); }
 459
 460                 for (idx, hop) in route.hops.iter().enumerate().rev() {
 461                         // First hop gets special values so that it can check, on receipt, that everything is
 462                         // exactly as it should be (and the next hop isn't trying to probe to find out if we're
 463                         // the intended recipient).
 464                         let value_msat = if cur_value_msat == 0 { hop.fee_msat } else { cur_value_msat };
 465                         let cltv = if cur_cltv == starting_htlc_offset { hop.cltv_expiry_delta + starting_htlc_offset } else { cur_cltv };
 466                         res[idx] = msgs::OnionHopData {
 467                                 realm: 0,
 468                                 data: msgs::OnionRealm0HopData {
 469                                         short_channel_id: last_short_channel_id,
 470                                         amt_to_forward: value_msat,
 471                                         outgoing_cltv_value: cltv,
 472                                 },
 473                                 hmac: [0; 32],
 474                         };
 475                         cur_value_msat += hop.fee_msat;
 476                         if cur_value_msat >= 21000000 * 100000000 * 1000 {
 477                                 return Err(HandleError{err: "Channel fees overflowed?!", action: None});
 478                         }
 479                         cur_cltv += hop.cltv_expiry_delta as u32;
 480                         if cur_cltv >= 500000000 {
 481                                 return Err(HandleError{err: "Channel CLTV overflowed?!", action: None});
 482                         }
 483                         last_short_channel_id = hop.short_channel_id;
 484                 }
 485                 Ok((res, cur_value_msat, cur_cltv))
 486         }
 487
 488         #[inline]
 489         fn shift_arr_right(arr: &mut [u8; 20*65]) {
 490                 unsafe {
 491                         ptr::copy(arr[0..].as_ptr(), arr[65..].as_mut_ptr(), 19*65);
 492                 }
 493                 for i in 0..65 {
 494                         arr[i] = 0;
 495                 }
 496         }
 497
 498         #[inline]
 499         fn xor_bufs(dst: &mut[u8], src: &[u8]) {
 500                 assert_eq!(dst.len(), src.len());
 501
 502                 for i in 0..dst.len() {
 503                         dst[i] ^= src[i];
 504                 }
 505         }
 506
 507         const ZERO:[u8; 21*65] = [0; 21*65];
 508         fn construct_onion_packet(mut payloads: Vec<msgs::OnionHopData>, onion_keys: Vec<OnionKeys>, associated_data: &[u8; 32]) -> Result<msgs::OnionPacket, HandleError> {
 509                 let mut buf = Vec::with_capacity(21*65);
 510                 buf.resize(21*65, 0);
 511
 512                 let filler = {
 513                         let iters = payloads.len() - 1;
 514                         let end_len = iters * 65;
 515                         let mut res = Vec::with_capacity(end_len);
 516                         res.resize(end_len, 0);
 517
 518                         for (i, keys) in onion_keys.iter().enumerate() {
 519                                 if i == payloads.len() - 1 { continue; }
 520                                 let mut chacha = ChaCha20::new(&keys.rho, &[0u8; 8]);
 521                                 chacha.process(&ChannelManager::ZERO, &mut buf); // We don't have a seek function :(
 522                                 ChannelManager::xor_bufs(&mut res[0..(i + 1)*65], &buf[(20 - i)*65..21*65]);
 523                         }
 524                         res
 525                 };
 526
 527                 let mut packet_data = [0; 20*65];
 528                 let mut hmac_res = [0; 32];
 529
 530                 for (i, (payload, keys)) in payloads.iter_mut().zip(onion_keys.iter()).rev().enumerate() {
 531                         ChannelManager::shift_arr_right(&mut packet_data);
 532                         payload.hmac = hmac_res;
 533                         packet_data[0..65].copy_from_slice(&payload.encode()[..]);
 534
 535                         let mut chacha = ChaCha20::new(&keys.rho, &[0u8; 8]);
 536                         chacha.process(&packet_data, &mut buf[0..20*65]);
 537                         packet_data[..].copy_from_slice(&buf[0..20*65]);
 538
 539                         if i == 0 {
 540                                 packet_data[20*65 - filler.len()..20*65].copy_from_slice(&filler[..]);
 541                         }
 542
 543                         let mut hmac = Hmac::new(Sha256::new(), &keys.mu);
 544                         hmac.input(&packet_data);
 545                         hmac.input(&associated_data[..]);
 546                         hmac.raw_result(&mut hmac_res);
 547                 }
 548
 549                 Ok(msgs::OnionPacket{
 550                         version: 0,
 551                         public_key: onion_keys.first().unwrap().ephemeral_pubkey,
 552                         hop_data: packet_data,
 553                         hmac: hmac_res,
 554                 })
 555         }
 556
 557         /// Encrypts a failure packet. raw_packet can either be a
 558         /// msgs::DecodedOnionErrorPacket.encode() result or a msgs::OnionErrorPacket.data element.
 559         fn encrypt_failure_packet(shared_secret: &SharedSecret, raw_packet: &[u8]) -> msgs::OnionErrorPacket {
 560                 let ammag = ChannelManager::gen_ammag_from_shared_secret(&shared_secret);
 561
 562                 let mut packet_crypted = Vec::with_capacity(raw_packet.len());
 563                 packet_crypted.resize(raw_packet.len(), 0);
 564                 let mut chacha = ChaCha20::new(&ammag, &[0u8; 8]);
 565                 chacha.process(&raw_packet, &mut packet_crypted[..]);
 566                 msgs::OnionErrorPacket {
 567                         data: packet_crypted,
 568                 }
 569         }
 570
 571         fn build_failure_packet(shared_secret: &SharedSecret, failure_type: u16, failure_data: &[u8]) -> msgs::DecodedOnionErrorPacket {
 572                 assert!(failure_data.len() <= 256 - 2);
 573
 574                 let um = ChannelManager::gen_um_from_shared_secret(&shared_secret);
 575
 576                 let failuremsg = {
 577                         let mut res = Vec::with_capacity(2 + failure_data.len());
 578                         res.push(((failure_type >> 8) & 0xff) as u8);
 579                         res.push(((failure_type >> 0) & 0xff) as u8);
 580                         res.extend_from_slice(&failure_data[..]);
 581                         res
 582                 };
 583                 let pad = {
 584                         let mut res = Vec::with_capacity(256 - 2 - failure_data.len());
 585                         res.resize(256 - 2 - failure_data.len(), 0);
 586                         res
 587                 };
 588                 let mut packet = msgs::DecodedOnionErrorPacket {
 589                         hmac: [0; 32],
 590                         failuremsg: failuremsg,
 591                         pad: pad,
 592                 };
 593
 594                 let mut hmac = Hmac::new(Sha256::new(), &um);
 595                 hmac.input(&packet.encode()[32..]);
 596                 hmac.raw_result(&mut packet.hmac);
 597
 598                 packet
 599         }
 600
 601         #[inline]
 602         fn build_first_hop_failure_packet(shared_secret: &SharedSecret, failure_type: u16, failure_data: &[u8]) -> msgs::OnionErrorPacket {
 603                 let failure_packet = ChannelManager::build_failure_packet(shared_secret, failure_type, failure_data);
 604                 ChannelManager::encrypt_failure_packet(shared_secret, &failure_packet.encode()[..])
 605         }
 606
 607         /// only fails if the channel does not yet have an assigned short_id
 608         fn get_channel_update(&self, chan: &Channel) -> Result<msgs::ChannelUpdate, HandleError> {
 609                 let short_channel_id = match chan.get_short_channel_id() {
 610                         None => return Err(HandleError{err: "Channel not yet established", action: None}),
 611                         Some(id) => id,
 612                 };
 613
 614                 let were_node_one = PublicKey::from_secret_key(&self.secp_ctx, &self.our_network_key).unwrap().serialize()[..] < chan.get_their_node_id().serialize()[..];
 615
 616                 let unsigned = msgs::UnsignedChannelUpdate {
 617                         chain_hash: self.genesis_hash,
 618                         short_channel_id: short_channel_id,
 619                         timestamp: chan.get_channel_update_count(),
 620                         flags: (!were_node_one) as u16 | ((!chan.is_live() as u16) << 1),
 621                         cltv_expiry_delta: CLTV_EXPIRY_DELTA,
 622                         htlc_minimum_msat: chan.get_our_htlc_minimum_msat(),
 623                         fee_base_msat: chan.get_our_fee_base_msat(&*self.fee_estimator),
 624                         fee_proportional_millionths: self.fee_proportional_millionths,
 625                 };
 626
 627                 let msg_hash = Sha256dHash::from_data(&unsigned.encode()[..]);
 628                 let sig = self.secp_ctx.sign(&Message::from_slice(&msg_hash[..]).unwrap(), &self.our_network_key).unwrap(); //TODO Can we unwrap here?
 629
 630                 Ok(msgs::ChannelUpdate {
 631                         signature: sig,
 632                         contents: unsigned
 633                 })
 634         }
 635
 636         /// Sends a payment along a given route.
 637         /// Value parameters are provided via the last hop in route, see documentation for RouteHop
 638         /// fields for more info.
 639         /// Note that if the payment_hash already exists elsewhere (eg you're sending a duplicative
 640         /// payment), we don't do anything to stop you! We always try to ensure that if the provided
 641         /// next hop knows the preimage to payment_hash they can claim an additional amount as
 642         /// specified in the last hop in the route! Thus, you should probably do your own
 643         /// payment_preimage tracking (which you should already be doing as they represent "proof of
 644         /// payment") and prevent double-sends yourself.
 645         /// See-also docs on Channel::send_htlc_and_commit.
 646         /// May generate a SendHTLCs event on success, which should be relayed.
 647         pub fn send_payment(&self, route: Route, payment_hash: [u8; 32]) -> Result<(), HandleError> {
 648                 if route.hops.len() < 1 || route.hops.len() > 20 {
 649                         return Err(HandleError{err: "Route didn't go anywhere/had bogus size", action: None});
 650                 }
 651                 let our_node_id = self.get_our_node_id();
 652                 for (idx, hop) in route.hops.iter().enumerate() {
 653                         if idx != route.hops.len() - 1 && hop.pubkey == our_node_id {
 654                                 return Err(HandleError{err: "Route went through us but wasn't a simple rebalance loop to us", action: None});
 655                         }
 656                 }
 657
 658                 let session_priv = secp_call!(SecretKey::from_slice(&self.secp_ctx, &{
 659                         let mut session_key = [0; 32];
 660                         rng::fill_bytes(&mut session_key);
 661                         session_key
 662                 }));
 663
 664                 let cur_height = self.latest_block_height.load(Ordering::Acquire) as u32 + 1;
 665
 666                 let onion_keys = ChannelManager::construct_onion_keys(&self.secp_ctx, &route, &session_priv)?;
 667                 let (onion_payloads, htlc_msat, htlc_cltv) = ChannelManager::build_onion_payloads(&route, cur_height)?;
 668                 let onion_packet = ChannelManager::construct_onion_packet(onion_payloads, onion_keys, &payment_hash)?;
 669
 670                 let (first_hop_node_id, (update_add, commitment_signed, chan_monitor)) = {
 671                         let mut channel_state_lock = self.channel_state.lock().unwrap();
 672                         let channel_state = channel_state_lock.borrow_parts();
 673
 674                         let id = match channel_state.short_to_id.get(&route.hops.first().unwrap().short_channel_id) {
 675                                 None => return Err(HandleError{err: "No channel available with first hop!", action: None}),
 676                                 Some(id) => id.clone()
 677                         };
 678
 679                         let claimable_htlc_entry = channel_state.claimable_htlcs.entry(payment_hash.clone());
 680                         if let hash_map::Entry::Occupied(_) = claimable_htlc_entry {
 681                                 return Err(HandleError{err: "Already had pending HTLC with the same payment_hash", action: None});
 682                         }
 683
 684                         let res = {
 685                                 let chan = channel_state.by_id.get_mut(&id).unwrap();
 686                                 if chan.get_their_node_id() != route.hops.first().unwrap().pubkey {
 687                                         return Err(HandleError{err: "Node ID mismatch on first hop!", action: None});
 688                                 }
 689                                 chan.send_htlc_and_commit(htlc_msat, payment_hash, htlc_cltv, onion_packet)?
 690                         };
 691
 692                         let first_hop_node_id = route.hops.first().unwrap().pubkey;
 693
 694                         claimable_htlc_entry.or_insert(PendingOutboundHTLC::OutboundRoute {
 695                                 route,
 696                                 session_priv,
 697                         });
 698
 699                         match res {
 700                                 Some(msgs) => (first_hop_node_id, msgs),
 701                                 None => return Ok(()),
 702                         }
 703                 };
 704
 705                 if let Err(_e) = self.monitor.add_update_monitor(chan_monitor.get_funding_txo().unwrap(), chan_monitor) {
 706                         unimplemented!(); // maybe remove from claimable_htlcs?
 707                 }
 708
 709                 let mut events = self.pending_events.lock().unwrap();
 710                 events.push(events::Event::SendHTLCs {
 711                         node_id: first_hop_node_id,
 712                         msgs: vec![update_add],
 713                         commitment_msg: commitment_signed,
 714                 });
 715                 Ok(())
 716         }
 717
 718         /// Call this upon creation of a funding transaction for the given channel.
 719         /// Panics if a funding transaction has already been provided for this channel.
 720         pub fn funding_transaction_generated(&self, temporary_channel_id: &[u8; 32], funding_txo: OutPoint) {
 721                 macro_rules! add_pending_event {
 722                         ($event: expr) => {
 723                                 {
 724                                         let mut pending_events = self.pending_events.lock().unwrap();
 725                                         pending_events.push($event);
 726                                 }
 727                         }
 728                 }
 729
 730                 let (chan, msg, chan_monitor) = {
 731                         let mut channel_state = self.channel_state.lock().unwrap();
 732                         match channel_state.by_id.remove(temporary_channel_id) {
 733                                 Some(mut chan) => {
 734                                         match chan.get_outbound_funding_created(funding_txo) {
 735                                                 Ok(funding_msg) => {
 736                                                         (chan, funding_msg.0, funding_msg.1)
 737                                                 },
 738                                                 Err(e) => {
 739                                                         mem::drop(channel_state);
 740                                                         add_pending_event!(events::Event::DisconnectPeer {
 741                                                                 node_id: chan.get_their_node_id(),
 742                                                                 msg: if let Some(msgs::ErrorAction::DisconnectPeer { msg } ) = e.action { msg } else { None },
 743                                                         });
 744
 745                                                         return;
 746                                                 },
 747                                         }
 748                                 },
 749                                 None => return
 750                         }
 751                 }; // Release channel lock for install_watch_outpoint call,
 752                 if let Err(_e) = self.monitor.add_update_monitor(chan_monitor.get_funding_txo().unwrap(), chan_monitor) {
 753                         unimplemented!(); // maybe remove from claimable_htlcs?
 754                 }
 755                 add_pending_event!(events::Event::SendFundingCreated {
 756                         node_id: chan.get_their_node_id(),
 757                         msg: msg,
 758                 });
 759
 760                 let mut channel_state = self.channel_state.lock().unwrap();
 761                 channel_state.by_id.insert(chan.channel_id(), chan);
 762         }
 763
 764         fn get_announcement_sigs(&self, chan: &Channel) -> Result<Option<msgs::AnnouncementSignatures>, HandleError> {
 765                 if !chan.is_usable() || !chan.should_announce() { return Ok(None) }
 766
 767                 let (announcement, our_bitcoin_sig) = chan.get_channel_announcement(self.get_our_node_id(), self.genesis_hash.clone())?;
 768                 let msghash = Message::from_slice(&Sha256dHash::from_data(&announcement.encode()[..])[..]).unwrap();
 769                 let our_node_sig = secp_call!(self.secp_ctx.sign(&msghash, &self.our_network_key));
 770
 771                 Ok(Some(msgs::AnnouncementSignatures {
 772                         channel_id: chan.channel_id(),
 773                         short_channel_id: chan.get_short_channel_id().unwrap(),
 774                         node_signature: our_node_sig,
 775                         bitcoin_signature: our_bitcoin_sig,
 776                 }))
 777         }
 778
 779         /// Processes HTLCs which are pending waiting on random forward delay.
 780         /// Should only really ever be called in response to an PendingHTLCsForwardable event.
 781         /// Will likely generate further events.
 782         pub fn process_pending_htlc_forwards(&self) {
 783                 let mut new_events = Vec::new();
 784                 let mut failed_forwards = Vec::new();
 785                 {
 786                         let mut channel_state_lock = self.channel_state.lock().unwrap();
 787                         let channel_state = channel_state_lock.borrow_parts();
 788
 789                         if cfg!(not(feature = "fuzztarget")) && Instant::now() < *channel_state.next_forward {
 790                                 return;
 791                         }
 792
 793                         for (short_chan_id, pending_forwards) in channel_state.forward_htlcs.drain() {
 794                                 if short_chan_id != 0 {
 795                                         let forward_chan_id = match channel_state.short_to_id.get(&short_chan_id) {
 796                                                 Some(chan_id) => chan_id.clone(),
 797                                                 None => {
 798                                                         failed_forwards.reserve(pending_forwards.len());
 799                                                         for forward_info in pending_forwards {
 800                                                                 failed_forwards.push((forward_info.payment_hash, 0x4000 | 10, None));
 801                                                         }
 802                                                         continue;
 803                                                 }
 804                                         };
 805                                         let forward_chan = &mut channel_state.by_id.get_mut(&forward_chan_id).unwrap();
 806
 807                                         let mut add_htlc_msgs = Vec::new();
 808                                         for forward_info in pending_forwards {
 809                                                 match forward_chan.send_htlc(forward_info.amt_to_forward, forward_info.payment_hash, forward_info.outgoing_cltv_value, forward_info.onion_packet.unwrap()) {
 810                                                         Err(_e) => {
 811                                                                 let chan_update = self.get_channel_update(forward_chan).unwrap();
 812                                                                 failed_forwards.push((forward_info.payment_hash, 0x1000 | 7, Some(chan_update)));
 813                                                                 continue;
 814                                                         },
 815                                                         Ok(update_add) => {
 816                                                                 match update_add {
 817                                                                         Some(msg) => { add_htlc_msgs.push(msg); },
 818                                                                         None => {
 819                                                                                 // Nothing to do here...we're waiting on a remote
 820                                                                                 // revoke_and_ack before we can add anymore HTLCs. The Channel
 821                                                                                 // will automatically handle building the update_add_htlc and
 822                                                                                 // commitment_signed messages when we can.
 823                                                                                 // TODO: Do some kind of timer to set the channel as !is_live()
 824                                                                                 // as we don't really want others relying on us relaying through
 825                                                                                 // this channel currently :/.
 826                                                                         }
 827                                                                 }
 828                                                         }
 829                                                 }
 830                                         }
 831
 832                                         if !add_htlc_msgs.is_empty() {
 833                                                 let (commitment_msg, monitor) = match forward_chan.send_commitment() {
 834                                                         Ok(res) => res,
 835                                                         Err(_) => {
 836                                                                 //TODO: Handle...this is bad!
 837                                                                 continue;
 838                                                         },
 839                                                 };
 840                                                 new_events.push((Some(monitor), events::Event::SendHTLCs {
 841                                                         node_id: forward_chan.get_their_node_id(),
 842                                                         msgs: add_htlc_msgs,
 843                                                         commitment_msg: commitment_msg,
 844                                                 }));
 845                                         }
 846                                 } else {
 847                                         for forward_info in pending_forwards {
 848                                                 new_events.push((None, events::Event::PaymentReceived {
 849                                                         payment_hash: forward_info.payment_hash,
 850                                                         amt: forward_info.amt_to_forward,
 851                                                 }));
 852                                         }
 853                                 }
 854                         }
 855                 }
 856
 857                 for failed_forward in failed_forwards.drain(..) {
 858                         match failed_forward.2 {
 859                                 None => self.fail_htlc_backwards_internal(self.channel_state.lock().unwrap(), &failed_forward.0, HTLCFailReason::Reason { failure_code: failed_forward.1, data: Vec::new() }),
 860                                 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() }),
 861                         };
 862                 }
 863
 864                 if new_events.is_empty() { return }
 865
 866                 new_events.retain(|event| {
 867                         if let &Some(ref monitor) = &event.0 {
 868                                 if let Err(_e) = self.monitor.add_update_monitor(monitor.get_funding_txo().unwrap(), monitor.clone()) {
 869                                         unimplemented!();// but def dont push the event...
 870                                 }
 871                         }
 872                         true
 873                 });
 874
 875                 let mut events = self.pending_events.lock().unwrap();
 876                 events.reserve(new_events.len());
 877                 for event in new_events.drain(..) {
 878                         events.push(event.1);
 879                 }
 880         }
 881
 882         /// Indicates that the preimage for payment_hash is unknown after a PaymentReceived event.
 883         pub fn fail_htlc_backwards(&self, payment_hash: &[u8; 32]) -> bool {
 884                 self.fail_htlc_backwards_internal(self.channel_state.lock().unwrap(), payment_hash, HTLCFailReason::Reason { failure_code: 0x4000 | 15, data: Vec::new() })
 885         }
 886
 887         fn fail_htlc_backwards_internal(&self, mut channel_state: MutexGuard<ChannelHolder>, payment_hash: &[u8; 32], onion_error: HTLCFailReason) -> bool {
 888                 let mut pending_htlc = {
 889                         match channel_state.claimable_htlcs.remove(payment_hash) {
 890                                 Some(pending_htlc) => pending_htlc,
 891                                 None => return false,
 892                         }
 893                 };
 894
 895                 match pending_htlc {
 896                         PendingOutboundHTLC::CycledRoute { source_short_channel_id, incoming_packet_shared_secret, route, session_priv } => {
 897                                 channel_state.claimable_htlcs.insert(payment_hash.clone(), PendingOutboundHTLC::OutboundRoute {
 898                                         route,
 899                                         session_priv,
 900                                 });
 901                                 pending_htlc = PendingOutboundHTLC::IntermediaryHopData { source_short_channel_id, incoming_packet_shared_secret };
 902                         },
 903                         _ => {}
 904                 }
 905
 906                 match pending_htlc {
 907                         PendingOutboundHTLC::CycledRoute { .. } => { panic!("WAT"); },
 908                         PendingOutboundHTLC::OutboundRoute { .. } => {
 909                                 mem::drop(channel_state);
 910
 911                                 let mut pending_events = self.pending_events.lock().unwrap();
 912                                 pending_events.push(events::Event::PaymentFailed {
 913                                         payment_hash: payment_hash.clone()
 914                                 });
 915                                 false
 916                         },
 917                         PendingOutboundHTLC::IntermediaryHopData { source_short_channel_id, incoming_packet_shared_secret } => {
 918                                 let err_packet = match onion_error {
 919                                         HTLCFailReason::Reason { failure_code, data } => {
 920                                                 let packet = ChannelManager::build_failure_packet(&incoming_packet_shared_secret, failure_code, &data[..]).encode();
 921                                                 ChannelManager::encrypt_failure_packet(&incoming_packet_shared_secret, &packet)
 922                                         },
 923                                         HTLCFailReason::ErrorPacket { err } => {
 924                                                 ChannelManager::encrypt_failure_packet(&incoming_packet_shared_secret, &err.data)
 925                                         }
 926                                 };
 927
 928                                 let (node_id, fail_msgs) = {
 929                                         let chan_id = match channel_state.short_to_id.get(&source_short_channel_id) {
 930                                                 Some(chan_id) => chan_id.clone(),
 931                                                 None => return false
 932                                         };
 933
 934                                         let chan = channel_state.by_id.get_mut(&chan_id).unwrap();
 935                                         match chan.get_update_fail_htlc_and_commit(payment_hash, err_packet) {
 936                                                 Ok(msg) => (chan.get_their_node_id(), msg),
 937                                                 Err(_e) => {
 938                                                         //TODO: Do something with e?
 939                                                         return false;
 940                                                 },
 941                                         }
 942                                 };
 943
 944                                 match fail_msgs {
 945                                         Some((msg, commitment_msg, chan_monitor)) => {
 946                                                 mem::drop(channel_state);
 947
 948                                                 if let Err(_e) = self.monitor.add_update_monitor(chan_monitor.get_funding_txo().unwrap(), chan_monitor) {
 949                                                         unimplemented!();// but def dont push the event...
 950                                                 }
 951
 952                                                 let mut pending_events = self.pending_events.lock().unwrap();
 953                                                 pending_events.push(events::Event::SendFailHTLC {
 954                                                         node_id,
 955                                                         msg: msg,
 956                                                         commitment_msg: commitment_msg,
 957                                                 });
 958                                         },
 959                                         None => {},
 960                                 }
 961
 962                                 true
 963                         },
 964                 }
 965         }
 966
 967         /// Provides a payment preimage in response to a PaymentReceived event, returning true and
 968         /// generating message events for the net layer to claim the payment, if possible. Thus, you
 969         /// should probably kick the net layer to go send messages if this returns true!
 970         /// May panic if called except in response to a PaymentReceived event.
 971         pub fn claim_funds(&self, payment_preimage: [u8; 32]) -> bool {
 972                 self.claim_funds_internal(payment_preimage, true)
 973         }
 974         fn claim_funds_internal(&self, payment_preimage: [u8; 32], from_user: bool) -> bool {
 975                 let mut sha = Sha256::new();
 976                 sha.input(&payment_preimage);
 977                 let mut payment_hash = [0; 32];
 978                 sha.result(&mut payment_hash);
 979
 980                 let mut channel_state = self.channel_state.lock().unwrap();
 981                 let mut pending_htlc = {
 982                         match channel_state.claimable_htlcs.remove(&payment_hash) {
 983                                 Some(pending_htlc) => pending_htlc,
 984                                 None => return false,
 985                         }
 986                 };
 987
 988                 match pending_htlc {
 989                         PendingOutboundHTLC::CycledRoute { source_short_channel_id, incoming_packet_shared_secret, route, session_priv } => {
 990                                 if from_user { // This was the end hop back to us
 991                                         pending_htlc = PendingOutboundHTLC::IntermediaryHopData { source_short_channel_id, incoming_packet_shared_secret };
 992                                         channel_state.claimable_htlcs.insert(payment_hash, PendingOutboundHTLC::OutboundRoute { route, session_priv });
 993                                 } else { // This came from the first upstream node
 994                                         // Bank error in our favor! Maybe we should tell the user this somehow???
 995                                         pending_htlc = PendingOutboundHTLC::OutboundRoute { route, session_priv };
 996                                         channel_state.claimable_htlcs.insert(payment_hash, PendingOutboundHTLC::IntermediaryHopData { source_short_channel_id, incoming_packet_shared_secret });
 997                                 }
 998                         },
 999                         _ => {},
1000                 }
1001
1002                 match pending_htlc {
1003                         PendingOutboundHTLC::CycledRoute { .. } => { panic!("WAT"); },
1004                         PendingOutboundHTLC::OutboundRoute { .. } => {
1005                                 if from_user {
1006                                         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...");
1007                                 }
1008                                 mem::drop(channel_state);
1009                                 let mut pending_events = self.pending_events.lock().unwrap();
1010                                 pending_events.push(events::Event::PaymentSent {
1011                                         payment_preimage
1012                                 });
1013                                 false
1014                         },
1015                         PendingOutboundHTLC::IntermediaryHopData { source_short_channel_id, .. } => {
1016                                 let (node_id, fulfill_msgs) = {
1017                                         let chan_id = match channel_state.short_to_id.get(&source_short_channel_id) {
1018                                                 Some(chan_id) => chan_id.clone(),
1019                                                 None => return false
1020                                         };
1021
1022                                         let chan = channel_state.by_id.get_mut(&chan_id).unwrap();
1023                                         match chan.get_update_fulfill_htlc_and_commit(payment_preimage) {
1024                                                 Ok(msg) => (chan.get_their_node_id(), msg),
1025                                                 Err(_e) => {
1026                                                         //TODO: Do something with e?
1027                                                         return false;
1028                                                 },
1029                                         }
1030                                 };
1031
1032                                 mem::drop(channel_state);
1033                                 match fulfill_msgs {
1034                                         Some((msg, commitment_msg, chan_monitor)) => {
1035                                                 if let Err(_e) = self.monitor.add_update_monitor(chan_monitor.get_funding_txo().unwrap(), chan_monitor) {
1036                                                         unimplemented!();// but def dont push the event...
1037                                                 }
1038
1039                                                 let mut pending_events = self.pending_events.lock().unwrap();
1040                                                 pending_events.push(events::Event::SendFulfillHTLC {
1041                                                         node_id: node_id,
1042                                                         msg,
1043                                                         commitment_msg,
1044                                                 });
1045                                         },
1046                                         None => {},
1047                                 }
1048                                 true
1049                         },
1050                 }
1051         }
1052
1053         /// Gets the node_id held by this ChannelManager
1054         pub fn get_our_node_id(&self) -> PublicKey {
1055                 PublicKey::from_secret_key(&self.secp_ctx, &self.our_network_key).unwrap()
1056         }
1057
1058         /// Used to restore channels to normal operation after a
1059         /// ChannelMonitorUpdateErr::TemporaryFailure was returned from a channel monitor update
1060         /// operation.
1061         pub fn test_restore_channel_monitor(&self) {
1062                 unimplemented!();
1063         }
1064 }
1065
1066 impl events::EventsProvider for ChannelManager {
1067         fn get_and_clear_pending_events(&self) -> Vec<events::Event> {
1068                 let mut pending_events = self.pending_events.lock().unwrap();
1069                 let mut ret = Vec::new();
1070                 mem::swap(&mut ret, &mut *pending_events);
1071                 ret
1072         }
1073 }
1074
1075 impl ChainListener for ChannelManager {
1076         fn block_connected(&self, header: &BlockHeader, height: u32, txn_matched: &[&Transaction], indexes_of_txn_matched: &[u32]) {
1077                 let mut new_events = Vec::new();
1078                 {
1079                         let mut channel_state = self.channel_state.lock().unwrap();
1080                         let mut short_to_ids_to_insert = Vec::new();
1081                         let mut short_to_ids_to_remove = Vec::new();
1082                         channel_state.by_id.retain(|_, channel| {
1083                                 if let Some(funding_locked) = channel.block_connected(header, height, txn_matched, indexes_of_txn_matched) {
1084                                         let announcement_sigs = match self.get_announcement_sigs(channel) {
1085                                                 Ok(res) => res,
1086                                                 Err(_e) => {
1087                                                         //TODO: push e on events and blow up the channel (it has bad keys)
1088                                                         return true;
1089                                                 }
1090                                         };
1091                                         new_events.push(events::Event::SendFundingLocked {
1092                                                 node_id: channel.get_their_node_id(),
1093                                                 msg: funding_locked,
1094                                                 announcement_sigs: announcement_sigs
1095                                         });
1096                                         short_to_ids_to_insert.push((channel.get_short_channel_id().unwrap(), channel.channel_id()));
1097                                 }
1098                                 if let Some(funding_txo) = channel.get_funding_txo() {
1099                                         for tx in txn_matched {
1100                                                 for inp in tx.input.iter() {
1101                                                         if inp.prev_hash == funding_txo.txid && inp.prev_index == funding_txo.index as u32 {
1102                                                                 if let Some(short_id) = channel.get_short_channel_id() {
1103                                                                         short_to_ids_to_remove.push(short_id);
1104                                                                 }
1105                                                                 channel.force_shutdown();
1106                                                                 if let Ok(update) = self.get_channel_update(&channel) {
1107                                                                         new_events.push(events::Event::BroadcastChannelUpdate {
1108                                                                                 msg: update
1109                                                                         });
1110                                                                 }
1111                                                                 return false;
1112                                                         }
1113                                                 }
1114                                         }
1115                                 }
1116                                 if channel.channel_monitor().would_broadcast_at_height(height) {
1117                                         if let Some(short_id) = channel.get_short_channel_id() {
1118                                                 short_to_ids_to_remove.push(short_id);
1119                                         }
1120                                         channel.force_shutdown();
1121                                         if let Ok(update) = self.get_channel_update(&channel) {
1122                                                 new_events.push(events::Event::BroadcastChannelUpdate {
1123                                                         msg: update
1124                                                 });
1125                                         }
1126                                         return false;
1127                                 }
1128                                 true
1129                         });
1130                         for to_remove in short_to_ids_to_remove {
1131                                 channel_state.short_to_id.remove(&to_remove);
1132                         }
1133                         for to_insert in short_to_ids_to_insert {
1134                                 channel_state.short_to_id.insert(to_insert.0, to_insert.1);
1135                         }
1136                 }
1137                 let mut pending_events = self.pending_events.lock().unwrap();
1138                 for funding_locked in new_events.drain(..) {
1139                         pending_events.push(funding_locked);
1140                 }
1141                 self.latest_block_height.store(height as usize, Ordering::Release);
1142         }
1143
1144         /// We force-close the channel without letting our counterparty participate in the shutdown
1145         fn block_disconnected(&self, header: &BlockHeader) {
1146                 let mut channel_lock = self.channel_state.lock().unwrap();
1147                 let channel_state = channel_lock.borrow_parts();
1148                 let short_to_id = channel_state.short_to_id;
1149                 channel_state.by_id.retain(|_,  v| {
1150                         if v.block_disconnected(header) {
1151                                 let tx = v.force_shutdown();
1152                                 for broadcast_tx in tx {
1153                                         self.tx_broadcaster.broadcast_transaction(&broadcast_tx);
1154                                 }
1155                                 if let Some(short_id) = v.get_short_channel_id() {
1156                                         short_to_id.remove(&short_id);
1157                                 }
1158                                 false
1159                         } else {
1160                                 true
1161                         }
1162                 });
1163                 self.latest_block_height.fetch_sub(1, Ordering::AcqRel);
1164         }
1165 }
1166
1167 impl ChannelMessageHandler for ChannelManager {
1168         //TODO: Handle errors and close channel (or so)
1169         fn handle_open_channel(&self, their_node_id: &PublicKey, msg: &msgs::OpenChannel) -> Result<msgs::AcceptChannel, HandleError> {
1170                 if msg.chain_hash != self.genesis_hash {
1171                         return Err(HandleError{err: "Unknown genesis block hash", action: None});
1172                 }
1173                 let mut channel_state = self.channel_state.lock().unwrap();
1174                 if channel_state.by_id.contains_key(&msg.temporary_channel_id) {
1175                         return Err(HandleError{err: "temporary_channel_id collision!", action: None});
1176                 }
1177
1178                 let chan_keys = if cfg!(feature = "fuzztarget") {
1179                         ChannelKeys {
1180                                 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(),
1181                                 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(),
1182                                 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(),
1183                                 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(),
1184                                 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(),
1185                                 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(),
1186                                 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(),
1187                                 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],
1188                         }
1189                 } else {
1190                         let mut key_seed = [0u8; 32];
1191                         rng::fill_bytes(&mut key_seed);
1192                         match ChannelKeys::new_from_seed(&key_seed) {
1193                                 Ok(key) => key,
1194                                 Err(_) => panic!("RNG is busted!")
1195                         }
1196                 };
1197
1198                 let channel = Channel::new_from_req(&*self.fee_estimator, chan_keys, their_node_id.clone(), msg, 0, false, self.announce_channels_publicly)?;
1199                 let accept_msg = channel.get_accept_channel()?;
1200                 channel_state.by_id.insert(channel.channel_id(), channel);
1201                 Ok(accept_msg)
1202         }
1203
1204         fn handle_accept_channel(&self, their_node_id: &PublicKey, msg: &msgs::AcceptChannel) -> Result<(), HandleError> {
1205                 let (value, output_script, user_id) = {
1206                         let mut channel_state = self.channel_state.lock().unwrap();
1207                         match channel_state.by_id.get_mut(&msg.temporary_channel_id) {
1208                                 Some(chan) => {
1209                                         if chan.get_their_node_id() != *their_node_id {
1210                                                 return Err(HandleError{err: "Got a message for a channel from the wrong node!", action: None})
1211                                         }
1212                                         chan.accept_channel(&msg)?;
1213                                         (chan.get_value_satoshis(), chan.get_funding_redeemscript().to_v0_p2wsh(), chan.get_user_id())
1214                                 },
1215                                 None => return Err(HandleError{err: "Failed to find corresponding channel", action: None})
1216                         }
1217                 };
1218                 let mut pending_events = self.pending_events.lock().unwrap();
1219                 pending_events.push(events::Event::FundingGenerationReady {
1220                         temporary_channel_id: msg.temporary_channel_id,
1221                         channel_value_satoshis: value,
1222                         output_script: output_script,
1223                         user_channel_id: user_id,
1224                 });
1225                 Ok(())
1226         }
1227
1228         fn handle_funding_created(&self, their_node_id: &PublicKey, msg: &msgs::FundingCreated) -> Result<msgs::FundingSigned, HandleError> {
1229                 //TODO: broke this - a node shouldn't be able to get their channel removed by sending a
1230                 //funding_created a second time, or long after the first, or whatever (note this also
1231                 //leaves the short_to_id map in a busted state.
1232                 let (chan, funding_msg, monitor_update) = {
1233                         let mut channel_state = self.channel_state.lock().unwrap();
1234                         match channel_state.by_id.remove(&msg.temporary_channel_id) {
1235                                 Some(mut chan) => {
1236                                         if chan.get_their_node_id() != *their_node_id {
1237                                                 return Err(HandleError{err: "Got a message for a channel from the wrong node!", action: None})
1238                                         }
1239                                         match chan.funding_created(msg) {
1240                                                 Ok((funding_msg, monitor_update)) => {
1241                                                         (chan, funding_msg, monitor_update)
1242                                                 },
1243                                                 Err(e) => {
1244                                                         return Err(e);
1245                                                 }
1246                                         }
1247                                 },
1248                                 None => return Err(HandleError{err: "Failed to find corresponding channel", action: None})
1249                         }
1250                 }; // Release channel lock for install_watch_outpoint call,
1251                    // note that this means if the remote end is misbehaving and sends a message for the same
1252                    // channel back-to-back with funding_created, we'll end up thinking they sent a message
1253                    // for a bogus channel.
1254                 if let Err(_e) = self.monitor.add_update_monitor(monitor_update.get_funding_txo().unwrap(), monitor_update) {
1255                         unimplemented!();
1256                 }
1257                 let mut channel_state = self.channel_state.lock().unwrap();
1258                 channel_state.by_id.insert(funding_msg.channel_id, chan);
1259                 Ok(funding_msg)
1260         }
1261
1262         fn handle_funding_signed(&self, their_node_id: &PublicKey, msg: &msgs::FundingSigned) -> Result<(), HandleError> {
1263                 let (funding_txo, user_id, monitor) = {
1264                         let mut channel_state = self.channel_state.lock().unwrap();
1265                         match channel_state.by_id.get_mut(&msg.channel_id) {
1266                                 Some(chan) => {
1267                                         if chan.get_their_node_id() != *their_node_id {
1268                                                 return Err(HandleError{err: "Got a message for a channel from the wrong node!", action: None})
1269                                         }
1270                                         let chan_monitor = chan.funding_signed(&msg)?;
1271                                         (chan.get_funding_txo().unwrap(), chan.get_user_id(), chan_monitor)
1272                                 },
1273                                 None => return Err(HandleError{err: "Failed to find corresponding channel", action: None})
1274                         }
1275                 };
1276                 if let Err(_e) = self.monitor.add_update_monitor(monitor.get_funding_txo().unwrap(), monitor) {
1277                         unimplemented!();
1278                 }
1279                 let mut pending_events = self.pending_events.lock().unwrap();
1280                 pending_events.push(events::Event::FundingBroadcastSafe {
1281                         funding_txo: funding_txo,
1282                         user_channel_id: user_id,
1283                 });
1284                 Ok(())
1285         }
1286
1287         fn handle_funding_locked(&self, their_node_id: &PublicKey, msg: &msgs::FundingLocked) -> Result<Option<msgs::AnnouncementSignatures>, HandleError> {
1288                 let mut channel_state = self.channel_state.lock().unwrap();
1289                 match channel_state.by_id.get_mut(&msg.channel_id) {
1290                         Some(chan) => {
1291                                 if chan.get_their_node_id() != *their_node_id {
1292                                         return Err(HandleError{err: "Got a message for a channel from the wrong node!", action: None})
1293                                 }
1294                                 chan.funding_locked(&msg)?;
1295                                 return Ok(self.get_announcement_sigs(chan)?);
1296                         },
1297                         None => return Err(HandleError{err: "Failed to find corresponding channel", action: None})
1298                 };
1299         }
1300
1301         fn handle_shutdown(&self, their_node_id: &PublicKey, msg: &msgs::Shutdown) -> Result<(Option<msgs::Shutdown>, Option<msgs::ClosingSigned>), HandleError> {
1302                 let (res, chan_option) = {
1303                         let mut channel_state_lock = self.channel_state.lock().unwrap();
1304                         let channel_state = channel_state_lock.borrow_parts();
1305
1306                         match channel_state.by_id.entry(msg.channel_id.clone()) {
1307                                 hash_map::Entry::Occupied(mut chan_entry) => {
1308                                         if chan_entry.get().get_their_node_id() != *their_node_id {
1309                                                 return Err(HandleError{err: "Got a message for a channel from the wrong node!", action: None})
1310                                         }
1311                                         let res = chan_entry.get_mut().shutdown(&*self.fee_estimator, &msg)?;
1312                                         if chan_entry.get().is_shutdown() {
1313                                                 if let Some(short_id) = chan_entry.get().get_short_channel_id() {
1314                                                         channel_state.short_to_id.remove(&short_id);
1315                                                 }
1316                                                 (res, Some(chan_entry.remove_entry().1))
1317                                         } else { (res, None) }
1318                                 },
1319                                 hash_map::Entry::Vacant(_) => return Err(HandleError{err: "Failed to find corresponding channel", action: None})
1320                         }
1321                 };
1322                 for payment_hash in res.2 {
1323                         // unknown_next_peer...I dunno who that is anymore....
1324                         self.fail_htlc_backwards_internal(self.channel_state.lock().unwrap(), &payment_hash, HTLCFailReason::Reason { failure_code: 0x4000 | 10, data: Vec::new() });
1325                 }
1326                 if let Some(chan) = chan_option {
1327                         if let Ok(update) = self.get_channel_update(&chan) {
1328                                 let mut events = self.pending_events.lock().unwrap();
1329                                 events.push(events::Event::BroadcastChannelUpdate {
1330                                         msg: update
1331                                 });
1332                         }
1333                 }
1334                 Ok((res.0, res.1))
1335         }
1336
1337         fn handle_closing_signed(&self, their_node_id: &PublicKey, msg: &msgs::ClosingSigned) -> Result<Option<msgs::ClosingSigned>, HandleError> {
1338                 let (res, chan_option) = {
1339                         let mut channel_state_lock = self.channel_state.lock().unwrap();
1340                         let channel_state = channel_state_lock.borrow_parts();
1341                         match channel_state.by_id.entry(msg.channel_id.clone()) {
1342                                 hash_map::Entry::Occupied(mut chan_entry) => {
1343                                         if chan_entry.get().get_their_node_id() != *their_node_id {
1344                                                 return Err(HandleError{err: "Got a message for a channel from the wrong node!", action: None})
1345                                         }
1346                                         let res = chan_entry.get_mut().closing_signed(&*self.fee_estimator, &msg)?;
1347                                         if res.1.is_some() {
1348                                                 // We're done with this channel, we've got a signed closing transaction and
1349                                                 // will send the closing_signed back to the remote peer upon return. This
1350                                                 // also implies there are no pending HTLCs left on the channel, so we can
1351                                                 // fully delete it from tracking (the channel monitor is still around to
1352                                                 // watch for old state broadcasts)!
1353                                                 if let Some(short_id) = chan_entry.get().get_short_channel_id() {
1354                                                         channel_state.short_to_id.remove(&short_id);
1355                                                 }
1356                                                 (res, Some(chan_entry.remove_entry().1))
1357                                         } else { (res, None) }
1358                                 },
1359                                 hash_map::Entry::Vacant(_) => return Err(HandleError{err: "Failed to find corresponding channel", action: None})
1360                         }
1361                 };
1362                 if let Some(broadcast_tx) = res.1 {
1363                         self.tx_broadcaster.broadcast_transaction(&broadcast_tx);
1364                 }
1365                 if let Some(chan) = chan_option {
1366                         if let Ok(update) = self.get_channel_update(&chan) {
1367                                 let mut events = self.pending_events.lock().unwrap();
1368                                 events.push(events::Event::BroadcastChannelUpdate {
1369                                         msg: update
1370                                 });
1371                         }
1372                 }
1373                 Ok(res.0)
1374         }
1375
1376         fn handle_update_add_htlc(&self, their_node_id: &PublicKey, msg: &msgs::UpdateAddHTLC) -> Result<(), msgs::HandleError> {
1377                 //TODO: BOLT 4 points out a specific attack where a peer may re-send an onion packet and
1378                 //determine the state of the payment based on our response/if we forward anything/the time
1379                 //we take to respond. We should take care to avoid allowing such an attack.
1380                 //
1381                 //TODO: There exists a further attack where a node may garble the onion data, forward it to
1382                 //us repeatedly garbled in different ways, and compare our error messages, which are
1383                 //encrypted with the same key. Its not immediately obvious how to usefully exploit that,
1384                 //but we should prevent it anyway.
1385
1386                 let shared_secret = SharedSecret::new(&self.secp_ctx, &msg.onion_routing_packet.public_key, &self.our_network_key);
1387                 let (rho, mu) = ChannelManager::gen_rho_mu_from_shared_secret(&shared_secret);
1388
1389                 macro_rules! get_onion_hash {
1390                         () => {
1391                                 {
1392                                         let mut sha = Sha256::new();
1393                                         sha.input(&msg.onion_routing_packet.hop_data);
1394                                         let mut onion_hash = [0; 32];
1395                                         sha.result(&mut onion_hash);
1396                                         onion_hash
1397                                 }
1398                         }
1399                 }
1400
1401                 macro_rules! return_err {
1402                         ($msg: expr, $err_code: expr, $data: expr) => {
1403                                 return Err(msgs::HandleError {
1404                                         err: $msg,
1405                                         action: Some(msgs::ErrorAction::UpdateFailHTLC {
1406                                                 msg: msgs::UpdateFailHTLC {
1407                                                         channel_id: msg.channel_id,
1408                                                         htlc_id: msg.htlc_id,
1409                                                         reason: ChannelManager::build_first_hop_failure_packet(&shared_secret, $err_code, $data),
1410                                                 }
1411                                         }),
1412                                 });
1413                         }
1414                 }
1415
1416                 if msg.onion_routing_packet.version != 0 {
1417                         //TODO: Spec doesn't indicate if we should only hash hop_data here (and in other
1418                         //sha256_of_onion error data packets), or the entire onion_routing_packet. Either way,
1419                         //the hash doesn't really serve any purpuse - in the case of hashing all data, the
1420                         //receiving node would have to brute force to figure out which version was put in the
1421                         //packet by the node that send us the message, in the case of hashing the hop_data, the
1422                         //node knows the HMAC matched, so they already know what is there...
1423                         return_err!("Unknown onion packet version", 0x8000 | 0x4000 | 4, &get_onion_hash!());
1424                 }
1425
1426                 let mut hmac = Hmac::new(Sha256::new(), &mu);
1427                 hmac.input(&msg.onion_routing_packet.hop_data);
1428                 hmac.input(&msg.payment_hash);
1429                 if hmac.result() != MacResult::new(&msg.onion_routing_packet.hmac) {
1430                         return_err!("HMAC Check failed", 0x8000 | 0x4000 | 5, &get_onion_hash!());
1431                 }
1432
1433                 let mut chacha = ChaCha20::new(&rho, &[0u8; 8]);
1434                 let next_hop_data = {
1435                         let mut decoded = [0; 65];
1436                         chacha.process(&msg.onion_routing_packet.hop_data[0..65], &mut decoded);
1437                         match msgs::OnionHopData::decode(&decoded[..]) {
1438                                 Err(err) => {
1439                                         let error_code = match err {
1440                                                 msgs::DecodeError::UnknownRealmByte => 0x4000 | 1,
1441                                                 _ => 0x2000 | 2, // Should never happen
1442                                         };
1443                                         return_err!("Unable to decode our hop data", error_code, &[0;0]);
1444                                 },
1445                                 Ok(msg) => msg
1446                         }
1447                 };
1448
1449                 //TODO: Check that msg.cltv_expiry is within acceptable bounds!
1450
1451                 let mut pending_forward_info = if next_hop_data.hmac == [0; 32] {
1452                                 // OUR PAYMENT!
1453                                 if next_hop_data.data.amt_to_forward != msg.amount_msat {
1454                                         return_err!("Upstream node sent less than we were supposed to receive in payment", 19, &byte_utils::be64_to_array(msg.amount_msat));
1455                                 }
1456                                 if next_hop_data.data.outgoing_cltv_value != msg.cltv_expiry {
1457                                         return_err!("Upstream node set CLTV to the wrong value", 18, &byte_utils::be32_to_array(msg.cltv_expiry));
1458                                 }
1459
1460                                 // Note that we could obviously respond immediately with an update_fulfill_htlc
1461                                 // message, however that would leak that we are the recipient of this payment, so
1462                                 // instead we stay symmetric with the forwarding case, only responding (after a
1463                                 // delay) once they've send us a commitment_signed!
1464
1465                                 PendingForwardHTLCInfo {
1466                                         onion_packet: None,
1467                                         payment_hash: msg.payment_hash.clone(),
1468                                         short_channel_id: 0,
1469                                         prev_short_channel_id: 0,
1470                                         amt_to_forward: next_hop_data.data.amt_to_forward,
1471                                         outgoing_cltv_value: next_hop_data.data.outgoing_cltv_value,
1472                                 }
1473                         } else {
1474                                 let mut new_packet_data = [0; 20*65];
1475                                 chacha.process(&msg.onion_routing_packet.hop_data[65..], &mut new_packet_data[0..19*65]);
1476                                 chacha.process(&ChannelManager::ZERO[0..65], &mut new_packet_data[19*65..]);
1477
1478                                 let mut new_pubkey = msg.onion_routing_packet.public_key.clone();
1479
1480                                 let blinding_factor = {
1481                                         let mut sha = Sha256::new();
1482                                         sha.input(&new_pubkey.serialize()[..]);
1483                                         sha.input(&shared_secret[..]);
1484                                         let mut res = [0u8; 32];
1485                                         sha.result(&mut res);
1486                                         match SecretKey::from_slice(&self.secp_ctx, &res) {
1487                                                 Err(_) => {
1488                                                         // Return temporary node failure as its technically our issue, not the
1489                                                         // channel's issue.
1490                                                         return_err!("Blinding factor is an invalid private key", 0x2000 | 2, &[0;0]);
1491                                                 },
1492                                                 Ok(key) => key
1493                                         }
1494                                 };
1495
1496                                 match new_pubkey.mul_assign(&self.secp_ctx, &blinding_factor) {
1497                                         Err(_) => {
1498                                                 // Return temporary node failure as its technically our issue, not the
1499                                                 // channel's issue.
1500                                                 return_err!("New blinding factor is an invalid private key", 0x2000 | 2, &[0;0]);
1501                                         },
1502                                         Ok(_) => {}
1503                                 };
1504
1505                                 let outgoing_packet = msgs::OnionPacket {
1506                                         version: 0,
1507                                         public_key: new_pubkey,
1508                                         hop_data: new_packet_data,
1509                                         hmac: next_hop_data.hmac.clone(),
1510                                 };
1511
1512                                 //TODO: Check amt_to_forward and outgoing_cltv_value are within acceptable ranges!
1513
1514                                 PendingForwardHTLCInfo {
1515                                         onion_packet: Some(outgoing_packet),
1516                                         payment_hash: msg.payment_hash.clone(),
1517                                         short_channel_id: next_hop_data.data.short_channel_id,
1518                                         prev_short_channel_id: 0,
1519                                         amt_to_forward: next_hop_data.data.amt_to_forward,
1520                                         outgoing_cltv_value: next_hop_data.data.outgoing_cltv_value,
1521                                 }
1522                         };
1523
1524                 let mut channel_state_lock = self.channel_state.lock().unwrap();
1525                 let channel_state = channel_state_lock.borrow_parts();
1526
1527                 if pending_forward_info.onion_packet.is_some() { // If short_channel_id is 0 here, we'll reject them in the body here
1528                         let forwarding_id = match channel_state.short_to_id.get(&pending_forward_info.short_channel_id) {
1529                                 None => {
1530                                         return_err!("Don't have available channel for forwarding as requested.", 0x4000 | 10, &[0;0]);
1531                                 },
1532                                 Some(id) => id.clone(),
1533                         };
1534                         let chan = channel_state.by_id.get_mut(&forwarding_id).unwrap();
1535                         if !chan.is_live() {
1536                                 let chan_update = self.get_channel_update(chan).unwrap();
1537                                 return_err!("Forwarding channel is not in a ready state.", 0x1000 | 7, &chan_update.encode_with_len()[..]);
1538                         }
1539                 }
1540
1541                 let claimable_htlcs_entry = channel_state.claimable_htlcs.entry(msg.payment_hash.clone());
1542
1543                 // We dont correctly handle payments that route through us twice on their way to their
1544                 // destination. That's OK since those nodes are probably busted or trying to do network
1545                 // mapping through repeated loops. In either case, we want them to stop talking to us, so
1546                 // we send permanent_node_failure.
1547                 match &claimable_htlcs_entry {
1548                         &hash_map::Entry::Occupied(ref e) => {
1549                                 let mut acceptable_cycle = false;
1550                                 match e.get() {
1551                                         &PendingOutboundHTLC::OutboundRoute { .. } => {
1552                                                 acceptable_cycle = pending_forward_info.short_channel_id == 0;
1553                                         },
1554                                         _ => {},
1555                                 }
1556                                 if !acceptable_cycle {
1557                                         return_err!("Payment looped through us twice", 0x4000 | 0x2000 | 2, &[0;0]);
1558                                 }
1559                         },
1560                         _ => {},
1561                 }
1562
1563                 let (source_short_channel_id, res) = match channel_state.by_id.get_mut(&msg.channel_id) {
1564                         Some(chan) => {
1565                                 if chan.get_their_node_id() != *their_node_id {
1566                                         return Err(HandleError{err: "Got a message for a channel from the wrong node!", action: None})
1567                                 }
1568                                 if !chan.is_usable() {
1569                                         return Err(HandleError{err: "Channel not yet available for receiving HTLCs", action: None});
1570                                 }
1571                                 let short_channel_id = chan.get_short_channel_id().unwrap();
1572                                 pending_forward_info.prev_short_channel_id = short_channel_id;
1573                                 (short_channel_id, chan.update_add_htlc(&msg, pending_forward_info)?)
1574                         },
1575                         None => return Err(HandleError{err: "Failed to find corresponding channel", action: None}), //TODO: panic?
1576                 };
1577
1578                 match claimable_htlcs_entry {
1579                         hash_map::Entry::Occupied(mut e) => {
1580                                 let outbound_route = e.get_mut();
1581                                 let (route, session_priv) = match outbound_route {
1582                                         &mut PendingOutboundHTLC::OutboundRoute { ref route, ref session_priv } => {
1583                                                 (route.clone(), session_priv.clone())
1584                                         },
1585                                         _ => { panic!("WAT") },
1586                                 };
1587                                 *outbound_route = PendingOutboundHTLC::CycledRoute {
1588                                         source_short_channel_id,
1589                                         incoming_packet_shared_secret: shared_secret,
1590                                         route,
1591                                         session_priv,
1592                                 };
1593                         },
1594                         hash_map::Entry::Vacant(e) => {
1595                                 e.insert(PendingOutboundHTLC::IntermediaryHopData {
1596                                         source_short_channel_id,
1597                                         incoming_packet_shared_secret: shared_secret,
1598                                 });
1599                         }
1600                 }
1601
1602                 Ok(res)
1603         }
1604
1605         fn handle_update_fulfill_htlc(&self, their_node_id: &PublicKey, msg: &msgs::UpdateFulfillHTLC) -> Result<(), HandleError> {
1606                 //TODO: Delay the claimed_funds relaying just like we do outbound relay!
1607                 // Claim funds first, cause we don't really care if the channel we received the message on
1608                 // is broken, we may have enough info to get our own money!
1609                 self.claim_funds_internal(msg.payment_preimage.clone(), false);
1610
1611                 let monitor = {
1612                         let mut channel_state = self.channel_state.lock().unwrap();
1613                         match channel_state.by_id.get_mut(&msg.channel_id) {
1614                                 Some(chan) => {
1615                                         if chan.get_their_node_id() != *their_node_id {
1616                                                 return Err(HandleError{err: "Got a message for a channel from the wrong node!", action: None})
1617                                         }
1618                                         chan.update_fulfill_htlc(&msg)?
1619                                 },
1620                                 None => return Err(HandleError{err: "Failed to find corresponding channel", action: None})
1621                         }
1622                 };
1623                 if let Err(_e) = self.monitor.add_update_monitor(monitor.get_funding_txo().unwrap(), monitor) {
1624                         unimplemented!();
1625                 }
1626                 Ok(())
1627         }
1628
1629         fn handle_update_fail_htlc(&self, their_node_id: &PublicKey, msg: &msgs::UpdateFailHTLC) -> Result<Option<msgs::HTLCFailChannelUpdate>, HandleError> {
1630                 let mut channel_state = self.channel_state.lock().unwrap();
1631                 let payment_hash = match channel_state.by_id.get_mut(&msg.channel_id) {
1632                         Some(chan) => {
1633                                 if chan.get_their_node_id() != *their_node_id {
1634                                         return Err(HandleError{err: "Got a message for a channel from the wrong node!", action: None})
1635                                 }
1636                                 chan.update_fail_htlc(&msg, HTLCFailReason::ErrorPacket { err: msg.reason.clone() })
1637                         },
1638                         None => return Err(HandleError{err: "Failed to find corresponding channel", action: None})
1639                 }?;
1640
1641                 if let Some(pending_htlc) = channel_state.claimable_htlcs.get(&payment_hash) {
1642                         match pending_htlc {
1643                                 &PendingOutboundHTLC::OutboundRoute { ref route, ref session_priv } => {
1644                                         // Handle packed channel/node updates for passing back for the route handler
1645                                         let mut packet_decrypted = msg.reason.data.clone();
1646                                         let mut res = None;
1647                                         Self::construct_onion_keys_callback(&self.secp_ctx, &route, &session_priv, |shared_secret, _, _, route_hop| {
1648                                                 if res.is_some() { return; }
1649
1650                                                 let ammag = ChannelManager::gen_ammag_from_shared_secret(&shared_secret);
1651
1652                                                 let mut decryption_tmp = Vec::with_capacity(packet_decrypted.len());
1653                                                 decryption_tmp.resize(packet_decrypted.len(), 0);
1654                                                 let mut chacha = ChaCha20::new(&ammag, &[0u8; 8]);
1655                                                 chacha.process(&packet_decrypted, &mut decryption_tmp[..]);
1656                                                 packet_decrypted = decryption_tmp;
1657
1658                                                 if let Ok(err_packet) = msgs::DecodedOnionErrorPacket::decode(&packet_decrypted) {
1659                                                         if err_packet.failuremsg.len() >= 2 {
1660                                                                 let um = ChannelManager::gen_um_from_shared_secret(&shared_secret);
1661
1662                                                                 let mut hmac = Hmac::new(Sha256::new(), &um);
1663                                                                 hmac.input(&err_packet.encode()[32..]);
1664                                                                 let mut calc_tag = [0u8; 32];
1665                                                                 hmac.raw_result(&mut calc_tag);
1666                                                                 if crypto::util::fixed_time_eq(&calc_tag, &err_packet.hmac) {
1667                                                                         const UNKNOWN_CHAN: u16 = 0x4000|10;
1668                                                                         const TEMP_CHAN_FAILURE: u16 = 0x4000|7;
1669                                                                         match byte_utils::slice_to_be16(&err_packet.failuremsg[0..2]) {
1670                                                                                 TEMP_CHAN_FAILURE => {
1671                                                                                         if err_packet.failuremsg.len() >= 4 {
1672                                                                                                 let update_len = byte_utils::slice_to_be16(&err_packet.failuremsg[2..4]) as usize;
1673                                                                                                 if err_packet.failuremsg.len() >= 4 + update_len {
1674                                                                                                         if let Ok(chan_update) = msgs::ChannelUpdate::decode(&err_packet.failuremsg[4..4 + update_len]) {
1675                                                                                                                 res = Some(msgs::HTLCFailChannelUpdate::ChannelUpdateMessage {
1676                                                                                                                         msg: chan_update,
1677                                                                                                                 });
1678                                                                                                         }
1679                                                                                                 }
1680                                                                                         }
1681                                                                                 },
1682                                                                                 UNKNOWN_CHAN => {
1683                                                                                         // No such next-hop. We know this came from the
1684                                                                                         // current node as the HMAC validated.
1685                                                                                         res = Some(msgs::HTLCFailChannelUpdate::ChannelClosed {
1686                                                                                                 short_channel_id: route_hop.short_channel_id
1687                                                                                         });
1688                                                                                 },
1689                                                                                 _ => {}, //TODO: Enumerate all of these!
1690                                                                         }
1691                                                                 }
1692                                                         }
1693                                                 }
1694                                         }).unwrap();
1695                                         Ok(res)
1696                                 },
1697                                 _ => { Ok(None) },
1698                         }
1699                 } else {
1700                         Ok(None)
1701                 }
1702         }
1703
1704         fn handle_update_fail_malformed_htlc(&self, their_node_id: &PublicKey, msg: &msgs::UpdateFailMalformedHTLC) -> Result<(), HandleError> {
1705                 let mut channel_state = self.channel_state.lock().unwrap();
1706                 match channel_state.by_id.get_mut(&msg.channel_id) {
1707                         Some(chan) => {
1708                                 if chan.get_their_node_id() != *their_node_id {
1709                                         return Err(HandleError{err: "Got a message for a channel from the wrong node!", action: None})
1710                                 }
1711                                 chan.update_fail_malformed_htlc(&msg, HTLCFailReason::Reason { failure_code: msg.failure_code, data: Vec::new() })
1712                         },
1713                         None => return Err(HandleError{err: "Failed to find corresponding channel", action: None})
1714                 }
1715         }
1716
1717         fn handle_commitment_signed(&self, their_node_id: &PublicKey, msg: &msgs::CommitmentSigned) -> Result<(msgs::RevokeAndACK, Option<msgs::CommitmentSigned>), HandleError> {
1718                 let (revoke_and_ack, commitment_signed, chan_monitor) = {
1719                         let mut channel_state = self.channel_state.lock().unwrap();
1720                         match channel_state.by_id.get_mut(&msg.channel_id) {
1721                                 Some(chan) => {
1722                                         if chan.get_their_node_id() != *their_node_id {
1723                                                 return Err(HandleError{err: "Got a message for a channel from the wrong node!", action: None})
1724                                         }
1725                                         chan.commitment_signed(&msg)?
1726                                 },
1727                                 None => return Err(HandleError{err: "Failed to find corresponding channel", action: None})
1728                         }
1729                 };
1730                 if let Err(_e) = self.monitor.add_update_monitor(chan_monitor.get_funding_txo().unwrap(), chan_monitor) {
1731                         unimplemented!();
1732                 }
1733
1734                 Ok((revoke_and_ack, commitment_signed))
1735         }
1736
1737         fn handle_revoke_and_ack(&self, their_node_id: &PublicKey, msg: &msgs::RevokeAndACK) -> Result<Option<msgs::CommitmentUpdate>, HandleError> {
1738                 let (res, mut pending_forwards, mut pending_failures, chan_monitor) = {
1739                         let mut channel_state = self.channel_state.lock().unwrap();
1740                         match channel_state.by_id.get_mut(&msg.channel_id) {
1741                                 Some(chan) => {
1742                                         if chan.get_their_node_id() != *their_node_id {
1743                                                 return Err(HandleError{err: "Got a message for a channel from the wrong node!", action: None})
1744                                         }
1745                                         chan.revoke_and_ack(&msg)?
1746                                 },
1747                                 None => return Err(HandleError{err: "Failed to find corresponding channel", action: None})
1748                         }
1749                 };
1750                 if let Err(_e) = self.monitor.add_update_monitor(chan_monitor.get_funding_txo().unwrap(), chan_monitor) {
1751                         unimplemented!();
1752                 }
1753                 for failure in pending_failures.drain(..) {
1754                         self.fail_htlc_backwards_internal(self.channel_state.lock().unwrap(), &failure.0, failure.1);
1755                 }
1756
1757                 let mut forward_event = None;
1758                 if !pending_forwards.is_empty() {
1759                         let mut channel_state = self.channel_state.lock().unwrap();
1760                         if channel_state.forward_htlcs.is_empty() {
1761                                 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));
1762                                 channel_state.next_forward = forward_event.unwrap();
1763                         }
1764                         for forward_info in pending_forwards.drain(..) {
1765                                 match channel_state.forward_htlcs.entry(forward_info.short_channel_id) {
1766                                         hash_map::Entry::Occupied(mut entry) => {
1767                                                 entry.get_mut().push(forward_info);
1768                                         },
1769                                         hash_map::Entry::Vacant(entry) => {
1770                                                 entry.insert(vec!(forward_info));
1771                                         }
1772                                 }
1773                         }
1774                 }
1775                 match forward_event {
1776                         Some(time) => {
1777                                 let mut pending_events = self.pending_events.lock().unwrap();
1778                                 pending_events.push(events::Event::PendingHTLCsForwardable {
1779                                         time_forwardable: time
1780                                 });
1781                         }
1782                         None => {},
1783                 }
1784
1785                 Ok(res)
1786         }
1787
1788         fn handle_update_fee(&self, their_node_id: &PublicKey, msg: &msgs::UpdateFee) -> Result<(), HandleError> {
1789                 let mut channel_state = self.channel_state.lock().unwrap();
1790                 match channel_state.by_id.get_mut(&msg.channel_id) {
1791                         Some(chan) => {
1792                                 if chan.get_their_node_id() != *their_node_id {
1793                                         return Err(HandleError{err: "Got a message for a channel from the wrong node!", action: None})
1794                                 }
1795                                 chan.update_fee(&*self.fee_estimator, &msg)
1796                         },
1797                         None => return Err(HandleError{err: "Failed to find corresponding channel", action: None})
1798                 }
1799         }
1800
1801         fn handle_announcement_signatures(&self, their_node_id: &PublicKey, msg: &msgs::AnnouncementSignatures) -> Result<(), HandleError> {
1802                 let (chan_announcement, chan_update) = {
1803                         let mut channel_state = self.channel_state.lock().unwrap();
1804                         match channel_state.by_id.get_mut(&msg.channel_id) {
1805                                 Some(chan) => {
1806                                         if chan.get_their_node_id() != *their_node_id {
1807                                                 return Err(HandleError{err: "Got a message for a channel from the wrong node!", action: None})
1808                                         }
1809                                         if !chan.is_usable() {
1810                                                 return Err(HandleError{err: "Got an announcement_signatures before we were ready for it", action: None });
1811                                         }
1812
1813                                         let our_node_id = self.get_our_node_id();
1814                                         let (announcement, our_bitcoin_sig) = chan.get_channel_announcement(our_node_id.clone(), self.genesis_hash.clone())?;
1815
1816                                         let were_node_one = announcement.node_id_1 == our_node_id;
1817                                         let msghash = Message::from_slice(&Sha256dHash::from_data(&announcement.encode()[..])[..]).unwrap();
1818                                         secp_call!(self.secp_ctx.verify(&msghash, &msg.node_signature, if were_node_one { &announcement.node_id_2 } else { &announcement.node_id_1 }));
1819                                         secp_call!(self.secp_ctx.verify(&msghash, &msg.bitcoin_signature, if were_node_one { &announcement.bitcoin_key_2 } else { &announcement.bitcoin_key_1 }));
1820
1821                                         let our_node_sig = secp_call!(self.secp_ctx.sign(&msghash, &self.our_network_key));
1822
1823                                         (msgs::ChannelAnnouncement {
1824                                                 node_signature_1: if were_node_one { our_node_sig } else { msg.node_signature },
1825                                                 node_signature_2: if were_node_one { msg.node_signature } else { our_node_sig },
1826                                                 bitcoin_signature_1: if were_node_one { our_bitcoin_sig } else { msg.bitcoin_signature },
1827                                                 bitcoin_signature_2: if were_node_one { msg.bitcoin_signature } else { our_bitcoin_sig },
1828                                                 contents: announcement,
1829                                         }, self.get_channel_update(chan).unwrap()) // can only fail if we're not in a ready state
1830                                 },
1831                                 None => return Err(HandleError{err: "Failed to find corresponding channel", action: None})
1832                         }
1833                 };
1834                 let mut pending_events = self.pending_events.lock().unwrap();
1835                 pending_events.push(events::Event::BroadcastChannelAnnouncement { msg: chan_announcement, update_msg: chan_update });
1836                 Ok(())
1837         }
1838
1839         fn peer_disconnected(&self, their_node_id: &PublicKey, no_connection_possible: bool) {
1840                 let mut new_events = Vec::new();
1841                 {
1842                         let mut channel_state_lock = self.channel_state.lock().unwrap();
1843                         let channel_state = channel_state_lock.borrow_parts();
1844                         let short_to_id = channel_state.short_to_id;
1845                         if no_connection_possible {
1846                                 channel_state.by_id.retain(|_, chan| {
1847                                         if chan.get_their_node_id() == *their_node_id {
1848                                                 if let Some(short_id) = chan.get_short_channel_id() {
1849                                                         short_to_id.remove(&short_id);
1850                                                 }
1851                                                 let txn_to_broadcast = chan.force_shutdown();
1852                                                 for tx in txn_to_broadcast {
1853                                                         self.tx_broadcaster.broadcast_transaction(&tx);
1854                                                 }
1855                                                 if let Ok(update) = self.get_channel_update(&chan) {
1856                                                         new_events.push(events::Event::BroadcastChannelUpdate {
1857                                                                 msg: update
1858                                                         });
1859                                                 }
1860                                                 false
1861                                         } else {
1862                                                 true
1863                                         }
1864                                 });
1865                         } else {
1866                                 for chan in channel_state.by_id {
1867                                         if chan.1.get_their_node_id() == *their_node_id {
1868                                                 //TODO: mark channel disabled (and maybe announce such after a timeout). Also
1869                                                 //fail and wipe any uncommitted outbound HTLCs as those are considered after
1870                                                 //reconnect.
1871                                         }
1872                                 }
1873                         }
1874                 }
1875                 if !new_events.is_empty() {
1876                         let mut pending_events = self.pending_events.lock().unwrap();
1877                         for event in new_events.drain(..) {
1878                                 pending_events.push(event);
1879                         }
1880                 }
1881         }
1882 }
1883
1884 #[cfg(test)]
1885 mod tests {
1886         use chain::chaininterface;
1887         use chain::transaction::OutPoint;
1888         use chain::chaininterface::ChainListener;
1889         use ln::channelmanager::{ChannelManager,OnionKeys};
1890         use ln::router::{Route, RouteHop, Router};
1891         use ln::msgs;
1892         use ln::msgs::{MsgEncodable,ChannelMessageHandler,RoutingMessageHandler};
1893         use util::test_utils;
1894         use util::events::{Event, EventsProvider};
1895
1896         use bitcoin::util::hash::Sha256dHash;
1897         use bitcoin::blockdata::block::{Block, BlockHeader};
1898         use bitcoin::blockdata::transaction::{Transaction, TxOut};
1899         use bitcoin::network::constants::Network;
1900         use bitcoin::network::serialize::serialize;
1901         use bitcoin::network::serialize::BitcoinHash;
1902
1903         use hex;
1904
1905         use secp256k1::Secp256k1;
1906         use secp256k1::key::{PublicKey,SecretKey};
1907
1908         use crypto::sha2::Sha256;
1909         use crypto::digest::Digest;
1910
1911         use rand::{thread_rng,Rng};
1912
1913         use std::collections::HashMap;
1914         use std::default::Default;
1915         use std::sync::{Arc, Mutex};
1916         use std::time::Instant;
1917         use std::mem;
1918
1919         fn build_test_onion_keys() -> Vec<OnionKeys> {
1920                 // Keys from BOLT 4, used in both test vector tests
1921                 let secp_ctx = Secp256k1::new();
1922
1923                 let route = Route {
1924                         hops: vec!(
1925                                         RouteHop {
1926                                                 pubkey: PublicKey::from_slice(&secp_ctx, &hex::decode("02eec7245d6b7d2ccb30380bfbe2a3648cd7a942653f5aa340edcea1f283686619").unwrap()[..]).unwrap(),
1927                                                 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
1928                                         },
1929                                         RouteHop {
1930                                                 pubkey: PublicKey::from_slice(&secp_ctx, &hex::decode("0324653eac434488002cc06bbfb7f10fe18991e35f9fe4302dbea6d2353dc0ab1c").unwrap()[..]).unwrap(),
1931                                                 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
1932                                         },
1933                                         RouteHop {
1934                                                 pubkey: PublicKey::from_slice(&secp_ctx, &hex::decode("027f31ebc5462c1fdce1b737ecff52d37d75dea43ce11c74d25aa297165faa2007").unwrap()[..]).unwrap(),
1935                                                 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
1936                                         },
1937                                         RouteHop {
1938                                                 pubkey: PublicKey::from_slice(&secp_ctx, &hex::decode("032c0b7cf95324a07d05398b240174dc0c2be444d96b159aa6c7f7b1e668680991").unwrap()[..]).unwrap(),
1939                                                 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
1940                                         },
1941                                         RouteHop {
1942                                                 pubkey: PublicKey::from_slice(&secp_ctx, &hex::decode("02edabbd16b41c8371b92ef2f04c1185b4f03b6dcd52ba9b78d9d7c89c8f221145").unwrap()[..]).unwrap(),
1943                                                 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
1944                                         },
1945                         ),
1946                 };
1947
1948                 let session_priv = SecretKey::from_slice(&secp_ctx, &hex::decode("4141414141414141414141414141414141414141414141414141414141414141").unwrap()[..]).unwrap();
1949
1950                 let onion_keys = ChannelManager::construct_onion_keys(&secp_ctx, &route, &session_priv).unwrap();
1951                 assert_eq!(onion_keys.len(), route.hops.len());
1952                 onion_keys
1953         }
1954
1955         #[test]
1956         fn onion_vectors() {
1957                 // Packet creation test vectors from BOLT 4
1958                 let onion_keys = build_test_onion_keys();
1959
1960                 assert_eq!(onion_keys[0].shared_secret[..], hex::decode("53eb63ea8a3fec3b3cd433b85cd62a4b145e1dda09391b348c4e1cd36a03ea66").unwrap()[..]);
1961                 assert_eq!(onion_keys[0].blinding_factor[..], hex::decode("2ec2e5da605776054187180343287683aa6a51b4b1c04d6dd49c45d8cffb3c36").unwrap()[..]);
1962                 assert_eq!(onion_keys[0].ephemeral_pubkey.serialize()[..], hex::decode("02eec7245d6b7d2ccb30380bfbe2a3648cd7a942653f5aa340edcea1f283686619").unwrap()[..]);
1963                 assert_eq!(onion_keys[0].rho, hex::decode("ce496ec94def95aadd4bec15cdb41a740c9f2b62347c4917325fcc6fb0453986").unwrap()[..]);
1964                 assert_eq!(onion_keys[0].mu, hex::decode("b57061dc6d0a2b9f261ac410c8b26d64ac5506cbba30267a649c28c179400eba").unwrap()[..]);
1965
1966                 assert_eq!(onion_keys[1].shared_secret[..], hex::decode("a6519e98832a0b179f62123b3567c106db99ee37bef036e783263602f3488fae").unwrap()[..]);
1967                 assert_eq!(onion_keys[1].blinding_factor[..], hex::decode("bf66c28bc22e598cfd574a1931a2bafbca09163df2261e6d0056b2610dab938f").unwrap()[..]);
1968                 assert_eq!(onion_keys[1].ephemeral_pubkey.serialize()[..], hex::decode("028f9438bfbf7feac2e108d677e3a82da596be706cc1cf342b75c7b7e22bf4e6e2").unwrap()[..]);
1969                 assert_eq!(onion_keys[1].rho, hex::decode("450ffcabc6449094918ebe13d4f03e433d20a3d28a768203337bc40b6e4b2c59").unwrap()[..]);
1970                 assert_eq!(onion_keys[1].mu, hex::decode("05ed2b4a3fb023c2ff5dd6ed4b9b6ea7383f5cfe9d59c11d121ec2c81ca2eea9").unwrap()[..]);
1971
1972                 assert_eq!(onion_keys[2].shared_secret[..], hex::decode("3a6b412548762f0dbccce5c7ae7bb8147d1caf9b5471c34120b30bc9c04891cc").unwrap()[..]);
1973                 assert_eq!(onion_keys[2].blinding_factor[..], hex::decode("a1f2dadd184eb1627049673f18c6325814384facdee5bfd935d9cb031a1698a5").unwrap()[..]);
1974                 assert_eq!(onion_keys[2].ephemeral_pubkey.serialize()[..], hex::decode("03bfd8225241ea71cd0843db7709f4c222f62ff2d4516fd38b39914ab6b83e0da0").unwrap()[..]);
1975                 assert_eq!(onion_keys[2].rho, hex::decode("11bf5c4f960239cb37833936aa3d02cea82c0f39fd35f566109c41f9eac8deea").unwrap()[..]);
1976                 assert_eq!(onion_keys[2].mu, hex::decode("caafe2820fa00eb2eeb78695ae452eba38f5a53ed6d53518c5c6edf76f3f5b78").unwrap()[..]);
1977
1978                 assert_eq!(onion_keys[3].shared_secret[..], hex::decode("21e13c2d7cfe7e18836df50872466117a295783ab8aab0e7ecc8c725503ad02d").unwrap()[..]);
1979                 assert_eq!(onion_keys[3].blinding_factor[..], hex::decode("7cfe0b699f35525029ae0fa437c69d0f20f7ed4e3916133f9cacbb13c82ff262").unwrap()[..]);
1980                 assert_eq!(onion_keys[3].ephemeral_pubkey.serialize()[..], hex::decode("031dde6926381289671300239ea8e57ffaf9bebd05b9a5b95beaf07af05cd43595").unwrap()[..]);
1981                 assert_eq!(onion_keys[3].rho, hex::decode("cbe784ab745c13ff5cffc2fbe3e84424aa0fd669b8ead4ee562901a4a4e89e9e").unwrap()[..]);
1982                 assert_eq!(onion_keys[3].mu, hex::decode("5052aa1b3d9f0655a0932e50d42f0c9ba0705142c25d225515c45f47c0036ee9").unwrap()[..]);
1983
1984                 assert_eq!(onion_keys[4].shared_secret[..], hex::decode("b5756b9b542727dbafc6765a49488b023a725d631af688fc031217e90770c328").unwrap()[..]);
1985                 assert_eq!(onion_keys[4].blinding_factor[..], hex::decode("c96e00dddaf57e7edcd4fb5954be5b65b09f17cb6d20651b4e90315be5779205").unwrap()[..]);
1986                 assert_eq!(onion_keys[4].ephemeral_pubkey.serialize()[..], hex::decode("03a214ebd875aab6ddfd77f22c5e7311d7f77f17a169e599f157bbcdae8bf071f4").unwrap()[..]);
1987                 assert_eq!(onion_keys[4].rho, hex::decode("034e18b8cc718e8af6339106e706c52d8df89e2b1f7e9142d996acf88df8799b").unwrap()[..]);
1988                 assert_eq!(onion_keys[4].mu, hex::decode("8e45e5c61c2b24cb6382444db6698727afb063adecd72aada233d4bf273d975a").unwrap()[..]);
1989
1990                 // Test vectors below are flat-out wrong: they claim to set outgoing_cltv_value to non-0 :/
1991                 let payloads = vec!(
1992                         msgs::OnionHopData {
1993                                 realm: 0,
1994                                 data: msgs::OnionRealm0HopData {
1995                                         short_channel_id: 0,
1996                                         amt_to_forward: 0,
1997                                         outgoing_cltv_value: 0,
1998                                 },
1999                                 hmac: [0; 32],
2000                         },
2001                         msgs::OnionHopData {
2002                                 realm: 0,
2003                                 data: msgs::OnionRealm0HopData {
2004                                         short_channel_id: 0x0101010101010101,
2005                                         amt_to_forward: 0x0100000001,
2006                                         outgoing_cltv_value: 0,
2007                                 },
2008                                 hmac: [0; 32],
2009                         },
2010                         msgs::OnionHopData {
2011                                 realm: 0,
2012                                 data: msgs::OnionRealm0HopData {
2013                                         short_channel_id: 0x0202020202020202,
2014                                         amt_to_forward: 0x0200000002,
2015                                         outgoing_cltv_value: 0,
2016                                 },
2017                                 hmac: [0; 32],
2018                         },
2019                         msgs::OnionHopData {
2020                                 realm: 0,
2021                                 data: msgs::OnionRealm0HopData {
2022                                         short_channel_id: 0x0303030303030303,
2023                                         amt_to_forward: 0x0300000003,
2024                                         outgoing_cltv_value: 0,
2025                                 },
2026                                 hmac: [0; 32],
2027                         },
2028                         msgs::OnionHopData {
2029                                 realm: 0,
2030                                 data: msgs::OnionRealm0HopData {
2031                                         short_channel_id: 0x0404040404040404,
2032                                         amt_to_forward: 0x0400000004,
2033                                         outgoing_cltv_value: 0,
2034                                 },
2035                                 hmac: [0; 32],
2036                         },
2037                 );
2038
2039                 let packet = ChannelManager::construct_onion_packet(payloads, onion_keys, &[0x42; 32]).unwrap();
2040                 // Just check the final packet encoding, as it includes all the per-hop vectors in it
2041                 // anyway...
2042                 assert_eq!(packet.encode(), hex::decode("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").unwrap());
2043         }
2044
2045         #[test]
2046         fn test_failure_packet_onion() {
2047                 // Returning Errors test vectors from BOLT 4
2048
2049                 let onion_keys = build_test_onion_keys();
2050                 let onion_error = ChannelManager::build_failure_packet(&onion_keys[4].shared_secret, 0x2002, &[0; 0]);
2051                 assert_eq!(onion_error.encode(), hex::decode("4c2fc8bc08510334b6833ad9c3e79cd1b52ae59dfe5c2a4b23ead50f09f7ee0b0002200200fe0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000").unwrap());
2052
2053                 let onion_packet_1 = ChannelManager::encrypt_failure_packet(&onion_keys[4].shared_secret, &onion_error.encode()[..]);
2054                 assert_eq!(onion_packet_1.data, hex::decode("a5e6bd0c74cb347f10cce367f949098f2457d14c046fd8a22cb96efb30b0fdcda8cb9168b50f2fd45edd73c1b0c8b33002df376801ff58aaa94000bf8a86f92620f343baef38a580102395ae3abf9128d1047a0736ff9b83d456740ebbb4aeb3aa9737f18fb4afb4aa074fb26c4d702f42968888550a3bded8c05247e045b866baef0499f079fdaeef6538f31d44deafffdfd3afa2fb4ca9082b8f1c465371a9894dd8c243fb4847e004f5256b3e90e2edde4c9fb3082ddfe4d1e734cacd96ef0706bf63c9984e22dc98851bcccd1c3494351feb458c9c6af41c0044bea3c47552b1d992ae542b17a2d0bba1a096c78d169034ecb55b6e3a7263c26017f033031228833c1daefc0dedb8cf7c3e37c9c37ebfe42f3225c326e8bcfd338804c145b16e34e4").unwrap());
2055
2056                 let onion_packet_2 = ChannelManager::encrypt_failure_packet(&onion_keys[3].shared_secret, &onion_packet_1.data[..]);
2057                 assert_eq!(onion_packet_2.data, hex::decode("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").unwrap());
2058
2059                 let onion_packet_3 = ChannelManager::encrypt_failure_packet(&onion_keys[2].shared_secret, &onion_packet_2.data[..]);
2060                 assert_eq!(onion_packet_3.data, hex::decode("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").unwrap());
2061
2062                 let onion_packet_4 = ChannelManager::encrypt_failure_packet(&onion_keys[1].shared_secret, &onion_packet_3.data[..]);
2063                 assert_eq!(onion_packet_4.data, hex::decode("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").unwrap());
2064
2065                 let onion_packet_5 = ChannelManager::encrypt_failure_packet(&onion_keys[0].shared_secret, &onion_packet_4.data[..]);
2066                 assert_eq!(onion_packet_5.data, hex::decode("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").unwrap());
2067         }
2068
2069         fn confirm_transaction(chain: &chaininterface::ChainWatchInterfaceUtil, tx: &Transaction, chan_id: u32) {
2070                 assert!(chain.does_match_tx(tx));
2071                 let mut header = BlockHeader { version: 0x20000000, prev_blockhash: Default::default(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
2072                 chain.block_connected_checked(&header, 1, &[tx; 1], &[chan_id; 1]);
2073                 for i in 2..100 {
2074                         header = BlockHeader { version: 0x20000000, prev_blockhash: header.bitcoin_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
2075                         chain.block_connected_checked(&header, i, &[tx; 0], &[0; 0]);
2076                 }
2077         }
2078
2079         struct Node {
2080                 feeest: Arc<test_utils::TestFeeEstimator>,
2081                 chain_monitor: Arc<chaininterface::ChainWatchInterfaceUtil>,
2082                 tx_broadcaster: Arc<test_utils::TestBroadcaster>,
2083                 chan_monitor: Arc<test_utils::TestChannelMonitor>,
2084                 node_id: SecretKey,
2085                 node: Arc<ChannelManager>,
2086                 router: Router,
2087         }
2088
2089         static mut CHAN_COUNT: u32 = 0;
2090         fn create_chan_between_nodes(node_a: &Node, node_b: &Node) -> (msgs::ChannelAnnouncement, msgs::ChannelUpdate, msgs::ChannelUpdate, [u8; 32], Transaction) {
2091                 node_a.node.create_channel(node_b.node.get_our_node_id(), 100000, 42).unwrap();
2092
2093                 let events_1 = node_a.node.get_and_clear_pending_events();
2094                 assert_eq!(events_1.len(), 1);
2095                 let accept_chan = match events_1[0] {
2096                         Event::SendOpenChannel { ref node_id, ref msg } => {
2097                                 assert_eq!(*node_id, node_b.node.get_our_node_id());
2098                                 node_b.node.handle_open_channel(&node_a.node.get_our_node_id(), msg).unwrap()
2099                         },
2100                         _ => panic!("Unexpected event"),
2101                 };
2102
2103                 node_a.node.handle_accept_channel(&node_b.node.get_our_node_id(), &accept_chan).unwrap();
2104
2105                 let chan_id = unsafe { CHAN_COUNT };
2106                 let tx;
2107                 let funding_output;
2108
2109                 let events_2 = node_a.node.get_and_clear_pending_events();
2110                 assert_eq!(events_2.len(), 1);
2111                 match events_2[0] {
2112                         Event::FundingGenerationReady { ref temporary_channel_id, ref channel_value_satoshis, ref output_script, user_channel_id } => {
2113                                 assert_eq!(*channel_value_satoshis, 100000);
2114                                 assert_eq!(user_channel_id, 42);
2115
2116                                 tx = Transaction { version: chan_id as u32, lock_time: 0, input: Vec::new(), output: vec![TxOut {
2117                                         value: *channel_value_satoshis, script_pubkey: output_script.clone(),
2118                                 }]};
2119                                 funding_output = OutPoint::new(Sha256dHash::from_data(&serialize(&tx).unwrap()[..]), 0);
2120
2121                                 node_a.node.funding_transaction_generated(&temporary_channel_id, funding_output);
2122                                 let mut added_monitors = node_a.chan_monitor.added_monitors.lock().unwrap();
2123                                 assert_eq!(added_monitors.len(), 1);
2124                                 assert_eq!(added_monitors[0].0, funding_output);
2125                                 added_monitors.clear();
2126                         },
2127                         _ => panic!("Unexpected event"),
2128                 }
2129
2130                 let events_3 = node_a.node.get_and_clear_pending_events();
2131                 assert_eq!(events_3.len(), 1);
2132                 let funding_signed = match events_3[0] {
2133                         Event::SendFundingCreated { ref node_id, ref msg } => {
2134                                 assert_eq!(*node_id, node_b.node.get_our_node_id());
2135                                 let res = node_b.node.handle_funding_created(&node_a.node.get_our_node_id(), msg).unwrap();
2136                                 let mut added_monitors = node_b.chan_monitor.added_monitors.lock().unwrap();
2137                                 assert_eq!(added_monitors.len(), 1);
2138                                 assert_eq!(added_monitors[0].0, funding_output);
2139                                 added_monitors.clear();
2140                                 res
2141                         },
2142                         _ => panic!("Unexpected event"),
2143                 };
2144
2145                 node_a.node.handle_funding_signed(&node_b.node.get_our_node_id(), &funding_signed).unwrap();
2146                 {
2147                         let mut added_monitors = node_a.chan_monitor.added_monitors.lock().unwrap();
2148                         assert_eq!(added_monitors.len(), 1);
2149                         assert_eq!(added_monitors[0].0, funding_output);
2150                         added_monitors.clear();
2151                 }
2152
2153                 let events_4 = node_a.node.get_and_clear_pending_events();
2154                 assert_eq!(events_4.len(), 1);
2155                 match events_4[0] {
2156                         Event::FundingBroadcastSafe { ref funding_txo, user_channel_id } => {
2157                                 assert_eq!(user_channel_id, 42);
2158                                 assert_eq!(*funding_txo, funding_output);
2159                         },
2160                         _ => panic!("Unexpected event"),
2161                 };
2162
2163                 confirm_transaction(&node_a.chain_monitor, &tx, chan_id);
2164                 let events_5 = node_a.node.get_and_clear_pending_events();
2165                 assert_eq!(events_5.len(), 1);
2166                 match events_5[0] {
2167                         Event::SendFundingLocked { ref node_id, ref msg, ref announcement_sigs } => {
2168                                 assert_eq!(*node_id, node_b.node.get_our_node_id());
2169                                 assert!(announcement_sigs.is_none());
2170                                 node_b.node.handle_funding_locked(&node_a.node.get_our_node_id(), msg).unwrap()
2171                         },
2172                         _ => panic!("Unexpected event"),
2173                 };
2174
2175                 let channel_id;
2176
2177                 confirm_transaction(&node_b.chain_monitor, &tx, chan_id);
2178                 let events_6 = node_b.node.get_and_clear_pending_events();
2179                 assert_eq!(events_6.len(), 1);
2180                 let as_announcement_sigs = match events_6[0] {
2181                         Event::SendFundingLocked { ref node_id, ref msg, ref announcement_sigs } => {
2182                                 assert_eq!(*node_id, node_a.node.get_our_node_id());
2183                                 channel_id = msg.channel_id.clone();
2184                                 let as_announcement_sigs = node_a.node.handle_funding_locked(&node_b.node.get_our_node_id(), msg).unwrap().unwrap();
2185                                 node_a.node.handle_announcement_signatures(&node_b.node.get_our_node_id(), &(*announcement_sigs).clone().unwrap()).unwrap();
2186                                 as_announcement_sigs
2187                         },
2188                         _ => panic!("Unexpected event"),
2189                 };
2190
2191                 let events_7 = node_a.node.get_and_clear_pending_events();
2192                 assert_eq!(events_7.len(), 1);
2193                 let (announcement, as_update) = match events_7[0] {
2194                         Event::BroadcastChannelAnnouncement { ref msg, ref update_msg } => {
2195                                 (msg, update_msg)
2196                         },
2197                         _ => panic!("Unexpected event"),
2198                 };
2199
2200                 node_b.node.handle_announcement_signatures(&node_a.node.get_our_node_id(), &as_announcement_sigs).unwrap();
2201                 let events_8 = node_b.node.get_and_clear_pending_events();
2202                 assert_eq!(events_8.len(), 1);
2203                 let bs_update = match events_8[0] {
2204                         Event::BroadcastChannelAnnouncement { ref msg, ref update_msg } => {
2205                                 assert!(*announcement == *msg);
2206                                 update_msg
2207                         },
2208                         _ => panic!("Unexpected event"),
2209                 };
2210
2211                 unsafe {
2212                         CHAN_COUNT += 1;
2213                 }
2214
2215                 ((*announcement).clone(), (*as_update).clone(), (*bs_update).clone(), channel_id, tx)
2216         }
2217
2218         fn create_announced_chan_between_nodes(nodes: &Vec<Node>, a: usize, b: usize) -> (msgs::ChannelUpdate, msgs::ChannelUpdate, [u8; 32], Transaction) {
2219                 let chan_announcement = create_chan_between_nodes(&nodes[a], &nodes[b]);
2220                 for node in nodes {
2221                         assert!(node.router.handle_channel_announcement(&chan_announcement.0).unwrap());
2222                         node.router.handle_channel_update(&chan_announcement.1).unwrap();
2223                         node.router.handle_channel_update(&chan_announcement.2).unwrap();
2224                 }
2225                 (chan_announcement.1, chan_announcement.2, chan_announcement.3, chan_announcement.4)
2226         }
2227
2228         fn close_channel(outbound_node: &Node, inbound_node: &Node, channel_id: &[u8; 32], funding_tx: Transaction, close_inbound_first: bool) -> (msgs::ChannelUpdate, msgs::ChannelUpdate) {
2229                 let (node_a, broadcaster_a) = if close_inbound_first { (&inbound_node.node, &inbound_node.tx_broadcaster) } else { (&outbound_node.node, &outbound_node.tx_broadcaster) };
2230                 let (node_b, broadcaster_b) = if close_inbound_first { (&outbound_node.node, &outbound_node.tx_broadcaster) } else { (&inbound_node.node, &inbound_node.tx_broadcaster) };
2231                 let (tx_a, tx_b);
2232
2233                 node_a.close_channel(channel_id).unwrap();
2234                 let events_1 = node_a.get_and_clear_pending_events();
2235                 assert_eq!(events_1.len(), 1);
2236                 let shutdown_a = match events_1[0] {
2237                         Event::SendShutdown { ref node_id, ref msg } => {
2238                                 assert_eq!(node_id, &node_b.get_our_node_id());
2239                                 msg.clone()
2240                         },
2241                         _ => panic!("Unexpected event"),
2242                 };
2243
2244                 let (shutdown_b, mut closing_signed_b) = node_b.handle_shutdown(&node_a.get_our_node_id(), &shutdown_a).unwrap();
2245                 if !close_inbound_first {
2246                         assert!(closing_signed_b.is_none());
2247                 }
2248                 let (empty_a, mut closing_signed_a) = node_a.handle_shutdown(&node_b.get_our_node_id(), &shutdown_b.unwrap()).unwrap();
2249                 assert!(empty_a.is_none());
2250                 if close_inbound_first {
2251                         assert!(closing_signed_a.is_none());
2252                         closing_signed_a = node_a.handle_closing_signed(&node_b.get_our_node_id(), &closing_signed_b.unwrap()).unwrap();
2253                         assert_eq!(broadcaster_a.txn_broadcasted.lock().unwrap().len(), 1);
2254                         tx_a = broadcaster_a.txn_broadcasted.lock().unwrap().remove(0);
2255
2256                         let empty_b = node_b.handle_closing_signed(&node_a.get_our_node_id(), &closing_signed_a.unwrap()).unwrap();
2257                         assert!(empty_b.is_none());
2258                         assert_eq!(broadcaster_b.txn_broadcasted.lock().unwrap().len(), 1);
2259                         tx_b = broadcaster_b.txn_broadcasted.lock().unwrap().remove(0);
2260                 } else {
2261                         closing_signed_b = node_b.handle_closing_signed(&node_a.get_our_node_id(), &closing_signed_a.unwrap()).unwrap();
2262                         assert_eq!(broadcaster_b.txn_broadcasted.lock().unwrap().len(), 1);
2263                         tx_b = broadcaster_b.txn_broadcasted.lock().unwrap().remove(0);
2264
2265                         let empty_a2 = node_a.handle_closing_signed(&node_b.get_our_node_id(), &closing_signed_b.unwrap()).unwrap();
2266                         assert!(empty_a2.is_none());
2267                         assert_eq!(broadcaster_a.txn_broadcasted.lock().unwrap().len(), 1);
2268                         tx_a = broadcaster_a.txn_broadcasted.lock().unwrap().remove(0);
2269                 }
2270                 assert_eq!(tx_a, tx_b);
2271                 let mut funding_tx_map = HashMap::new();
2272                 funding_tx_map.insert(funding_tx.txid(), funding_tx);
2273                 tx_a.verify(&funding_tx_map).unwrap();
2274
2275                 let events_2 = node_a.get_and_clear_pending_events();
2276                 assert_eq!(events_2.len(), 1);
2277                 let as_update = match events_2[0] {
2278                         Event::BroadcastChannelUpdate { ref msg } => {
2279                                 msg.clone()
2280                         },
2281                         _ => panic!("Unexpected event"),
2282                 };
2283
2284                 let events_3 = node_b.get_and_clear_pending_events();
2285                 assert_eq!(events_3.len(), 1);
2286                 let bs_update = match events_3[0] {
2287                         Event::BroadcastChannelUpdate { ref msg } => {
2288                                 msg.clone()
2289                         },
2290                         _ => panic!("Unexpected event"),
2291                 };
2292
2293                 (as_update, bs_update)
2294         }
2295
2296         struct SendEvent {
2297                 node_id: PublicKey,
2298                 msgs: Vec<msgs::UpdateAddHTLC>,
2299                 commitment_msg: msgs::CommitmentSigned,
2300         }
2301         impl SendEvent {
2302                 fn from_event(event: Event) -> SendEvent {
2303                         match event {
2304                                 Event::SendHTLCs { node_id, msgs, commitment_msg } => {
2305                                         SendEvent { node_id: node_id, msgs: msgs, commitment_msg: commitment_msg }
2306                                 },
2307                                 _ => panic!("Unexpected event type!"),
2308                         }
2309                 }
2310         }
2311
2312         static mut PAYMENT_COUNT: u8 = 0;
2313         fn send_along_route(origin_node: &Node, route: Route, expected_route: &[&Node], recv_value: u64) -> ([u8; 32], [u8; 32]) {
2314                 let our_payment_preimage = unsafe { [PAYMENT_COUNT; 32] };
2315                 unsafe { PAYMENT_COUNT += 1 };
2316                 let our_payment_hash = {
2317                         let mut sha = Sha256::new();
2318                         sha.input(&our_payment_preimage[..]);
2319                         let mut ret = [0; 32];
2320                         sha.result(&mut ret);
2321                         ret
2322                 };
2323
2324                 let mut payment_event = {
2325                         origin_node.node.send_payment(route, our_payment_hash).unwrap();
2326                         {
2327                                 let mut added_monitors = origin_node.chan_monitor.added_monitors.lock().unwrap();
2328                                 assert_eq!(added_monitors.len(), 1);
2329                                 added_monitors.clear();
2330                         }
2331
2332                         let mut events = origin_node.node.get_and_clear_pending_events();
2333                         assert_eq!(events.len(), 1);
2334                         SendEvent::from_event(events.remove(0))
2335                 };
2336                 let mut prev_node = origin_node;
2337
2338                 for (idx, &node) in expected_route.iter().enumerate() {
2339                         assert_eq!(node.node.get_our_node_id(), payment_event.node_id);
2340
2341                         node.node.handle_update_add_htlc(&prev_node.node.get_our_node_id(), &payment_event.msgs[0]).unwrap();
2342                         {
2343                                 let added_monitors = node.chan_monitor.added_monitors.lock().unwrap();
2344                                 assert_eq!(added_monitors.len(), 0);
2345                         }
2346
2347                         let revoke_and_ack = node.node.handle_commitment_signed(&prev_node.node.get_our_node_id(), &payment_event.commitment_msg).unwrap();
2348                         {
2349                                 let mut added_monitors = node.chan_monitor.added_monitors.lock().unwrap();
2350                                 assert_eq!(added_monitors.len(), 1);
2351                                 added_monitors.clear();
2352                         }
2353                         assert!(prev_node.node.handle_revoke_and_ack(&node.node.get_our_node_id(), &revoke_and_ack.0).unwrap().is_none());
2354                         let prev_revoke_and_ack = prev_node.node.handle_commitment_signed(&node.node.get_our_node_id(), &revoke_and_ack.1.unwrap()).unwrap();
2355                         {
2356                                 let mut added_monitors = prev_node.chan_monitor.added_monitors.lock().unwrap();
2357                                 assert_eq!(added_monitors.len(), 2);
2358                                 added_monitors.clear();
2359                         }
2360                         assert!(node.node.handle_revoke_and_ack(&prev_node.node.get_our_node_id(), &prev_revoke_and_ack.0).unwrap().is_none());
2361                         assert!(prev_revoke_and_ack.1.is_none());
2362                         {
2363                                 let mut added_monitors = node.chan_monitor.added_monitors.lock().unwrap();
2364                                 assert_eq!(added_monitors.len(), 1);
2365                                 added_monitors.clear();
2366                         }
2367
2368                         let events_1 = node.node.get_and_clear_pending_events();
2369                         assert_eq!(events_1.len(), 1);
2370                         match events_1[0] {
2371                                 Event::PendingHTLCsForwardable { .. } => { },
2372                                 _ => panic!("Unexpected event"),
2373                         };
2374
2375                         node.node.channel_state.lock().unwrap().next_forward = Instant::now();
2376                         node.node.process_pending_htlc_forwards();
2377
2378                         let mut events_2 = node.node.get_and_clear_pending_events();
2379                         assert_eq!(events_2.len(), 1);
2380                         if idx == expected_route.len() - 1 {
2381                                 match events_2[0] {
2382                                         Event::PaymentReceived { ref payment_hash, amt } => {
2383                                                 assert_eq!(our_payment_hash, *payment_hash);
2384                                                 assert_eq!(amt, recv_value);
2385                                         },
2386                                         _ => panic!("Unexpected event"),
2387                                 }
2388                         } else {
2389                                 {
2390                                         let mut added_monitors = node.chan_monitor.added_monitors.lock().unwrap();
2391                                         assert_eq!(added_monitors.len(), 1);
2392                                         added_monitors.clear();
2393                                 }
2394                                 payment_event = SendEvent::from_event(events_2.remove(0));
2395                                 assert_eq!(payment_event.msgs.len(), 1);
2396                         }
2397
2398                         prev_node = node;
2399                 }
2400
2401                 (our_payment_preimage, our_payment_hash)
2402         }
2403
2404         fn claim_payment(origin_node: &Node, expected_route: &[&Node], our_payment_preimage: [u8; 32]) {
2405                 assert!(expected_route.last().unwrap().node.claim_funds(our_payment_preimage));
2406                 {
2407                         let mut added_monitors = expected_route.last().unwrap().chan_monitor.added_monitors.lock().unwrap();
2408                         assert_eq!(added_monitors.len(), 1);
2409                         added_monitors.clear();
2410                 }
2411
2412                 let mut next_msgs: Option<(msgs::UpdateFulfillHTLC, msgs::CommitmentSigned)> = None;
2413                 macro_rules! update_fulfill_dance {
2414                         ($node: expr, $prev_node: expr, $last_node: expr) => {
2415                                 {
2416                                         $node.node.handle_update_fulfill_htlc(&$prev_node.node.get_our_node_id(), &next_msgs.as_ref().unwrap().0).unwrap();
2417                                         {
2418                                                 let mut added_monitors = $node.chan_monitor.added_monitors.lock().unwrap();
2419                                                 if $last_node {
2420                                                         assert_eq!(added_monitors.len(), 1);
2421                                                 } else {
2422                                                         assert_eq!(added_monitors.len(), 2);
2423                                                         assert!(added_monitors[0].0 != added_monitors[1].0);
2424                                                 }
2425                                                 added_monitors.clear();
2426                                         }
2427                                         let revoke_and_commit = $node.node.handle_commitment_signed(&$prev_node.node.get_our_node_id(), &next_msgs.as_ref().unwrap().1).unwrap();
2428                                         {
2429                                                 let mut added_monitors = $node.chan_monitor.added_monitors.lock().unwrap();
2430                                                 assert_eq!(added_monitors.len(), 1);
2431                                                 added_monitors.clear();
2432                                         }
2433                                         assert!($prev_node.node.handle_revoke_and_ack(&$node.node.get_our_node_id(), &revoke_and_commit.0).unwrap().is_none());
2434                                         let revoke_and_ack = $prev_node.node.handle_commitment_signed(&$node.node.get_our_node_id(), &revoke_and_commit.1.unwrap()).unwrap();
2435                                         assert!(revoke_and_ack.1.is_none());
2436                                         {
2437                                                 let mut added_monitors = $prev_node.chan_monitor.added_monitors.lock().unwrap();
2438                                                 assert_eq!(added_monitors.len(), 2);
2439                                                 added_monitors.clear();
2440                                         }
2441                                         assert!($node.node.handle_revoke_and_ack(&$prev_node.node.get_our_node_id(), &revoke_and_ack.0).unwrap().is_none());
2442                                         {
2443                                                 let mut added_monitors = $node.chan_monitor.added_monitors.lock().unwrap();
2444                                                 assert_eq!(added_monitors.len(), 1);
2445                                                 added_monitors.clear();
2446                                         }
2447                                 }
2448                         }
2449                 }
2450
2451                 let mut expected_next_node = expected_route.last().unwrap().node.get_our_node_id();
2452                 let mut prev_node = expected_route.last().unwrap();
2453                 for node in expected_route.iter().rev() {
2454                         assert_eq!(expected_next_node, node.node.get_our_node_id());
2455                         if next_msgs.is_some() {
2456                                 update_fulfill_dance!(node, prev_node, false);
2457                         }
2458
2459                         let events = node.node.get_and_clear_pending_events();
2460                         assert_eq!(events.len(), 1);
2461                         match events[0] {
2462                                 Event::SendFulfillHTLC { ref node_id, ref msg, ref commitment_msg } => {
2463                                         expected_next_node = node_id.clone();
2464                                         next_msgs = Some((msg.clone(), commitment_msg.clone()));
2465                                 },
2466                                 _ => panic!("Unexpected event"),
2467                         };
2468
2469                         prev_node = node;
2470                 }
2471
2472                 assert_eq!(expected_next_node, origin_node.node.get_our_node_id());
2473                 update_fulfill_dance!(origin_node, expected_route.first().unwrap(), true);
2474
2475                 let events = origin_node.node.get_and_clear_pending_events();
2476                 assert_eq!(events.len(), 1);
2477                 match events[0] {
2478                         Event::PaymentSent { payment_preimage } => {
2479                                 assert_eq!(payment_preimage, our_payment_preimage);
2480                         },
2481                         _ => panic!("Unexpected event"),
2482                 }
2483         }
2484
2485         const TEST_FINAL_CLTV: u32 = 32;
2486
2487         fn route_payment(origin_node: &Node, expected_route: &[&Node], recv_value: u64) -> ([u8; 32], [u8; 32]) {
2488                 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();
2489                 assert_eq!(route.hops.len(), expected_route.len());
2490                 for (node, hop) in expected_route.iter().zip(route.hops.iter()) {
2491                         assert_eq!(hop.pubkey, node.node.get_our_node_id());
2492                 }
2493
2494                 send_along_route(origin_node, route, expected_route, recv_value)
2495         }
2496
2497         fn route_over_limit(origin_node: &Node, expected_route: &[&Node], recv_value: u64) {
2498                 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();
2499                 assert_eq!(route.hops.len(), expected_route.len());
2500                 for (node, hop) in expected_route.iter().zip(route.hops.iter()) {
2501                         assert_eq!(hop.pubkey, node.node.get_our_node_id());
2502                 }
2503
2504                 let our_payment_preimage = unsafe { [PAYMENT_COUNT; 32] };
2505                 unsafe { PAYMENT_COUNT += 1 };
2506                 let our_payment_hash = {
2507                         let mut sha = Sha256::new();
2508                         sha.input(&our_payment_preimage[..]);
2509                         let mut ret = [0; 32];
2510                         sha.result(&mut ret);
2511                         ret
2512                 };
2513
2514                 let err = origin_node.node.send_payment(route, our_payment_hash).err().unwrap();
2515                 assert_eq!(err.err, "Cannot send value that would put us over our max HTLC value in flight");
2516         }
2517
2518         fn send_payment(origin: &Node, expected_route: &[&Node], recv_value: u64) {
2519                 let our_payment_preimage = route_payment(&origin, expected_route, recv_value).0;
2520                 claim_payment(&origin, expected_route, our_payment_preimage);
2521         }
2522
2523         fn fail_payment(origin_node: &Node, expected_route: &[&Node], our_payment_hash: [u8; 32]) {
2524                 assert!(expected_route.last().unwrap().node.fail_htlc_backwards(&our_payment_hash));
2525                 {
2526                         let mut added_monitors = expected_route.last().unwrap().chan_monitor.added_monitors.lock().unwrap();
2527                         assert_eq!(added_monitors.len(), 1);
2528                         added_monitors.clear();
2529                 }
2530
2531                 let mut next_msgs: Option<(msgs::UpdateFailHTLC, msgs::CommitmentSigned)> = None;
2532                 macro_rules! update_fail_dance {
2533                         ($node: expr, $prev_node: expr, $last_node: expr) => {
2534                                 {
2535                                         $node.node.handle_update_fail_htlc(&$prev_node.node.get_our_node_id(), &next_msgs.as_ref().unwrap().0).unwrap();
2536                                         let revoke_and_commit = $node.node.handle_commitment_signed(&$prev_node.node.get_our_node_id(), &next_msgs.as_ref().unwrap().1).unwrap();
2537
2538                                         {
2539                                                 let mut added_monitors = $node.chan_monitor.added_monitors.lock().unwrap();
2540                                                 assert_eq!(added_monitors.len(), 1);
2541                                                 added_monitors.clear();
2542                                         }
2543                                         assert!($prev_node.node.handle_revoke_and_ack(&$node.node.get_our_node_id(), &revoke_and_commit.0).unwrap().is_none());
2544                                         {
2545                                                 let mut added_monitors = $prev_node.chan_monitor.added_monitors.lock().unwrap();
2546                                                 assert_eq!(added_monitors.len(), 1);
2547                                                 added_monitors.clear();
2548                                         }
2549                                         let revoke_and_ack = $prev_node.node.handle_commitment_signed(&$node.node.get_our_node_id(), &revoke_and_commit.1.unwrap()).unwrap();
2550                                         {
2551                                                 let mut added_monitors = $prev_node.chan_monitor.added_monitors.lock().unwrap();
2552                                                 assert_eq!(added_monitors.len(), 1);
2553                                                 added_monitors.clear();
2554                                         }
2555                                         assert!(revoke_and_ack.1.is_none());
2556                                         assert!($node.node.get_and_clear_pending_events().is_empty());
2557                                         assert!($node.node.handle_revoke_and_ack(&$prev_node.node.get_our_node_id(), &revoke_and_ack.0).unwrap().is_none());
2558                                         {
2559                                                 let mut added_monitors = $node.chan_monitor.added_monitors.lock().unwrap();
2560                                                 if $last_node {
2561                                                         assert_eq!(added_monitors.len(), 1);
2562                                                 } else {
2563                                                         assert_eq!(added_monitors.len(), 2);
2564                                                         assert!(added_monitors[0].0 != added_monitors[1].0);
2565                                                 }
2566                                                 added_monitors.clear();
2567                                         }
2568                                 }
2569                         }
2570                 }
2571
2572                 let mut expected_next_node = expected_route.last().unwrap().node.get_our_node_id();
2573                 let mut prev_node = expected_route.last().unwrap();
2574                 for node in expected_route.iter().rev() {
2575                         assert_eq!(expected_next_node, node.node.get_our_node_id());
2576                         if next_msgs.is_some() {
2577                                 update_fail_dance!(node, prev_node, false);
2578                         }
2579
2580                         let events = node.node.get_and_clear_pending_events();
2581                         assert_eq!(events.len(), 1);
2582                         match events[0] {
2583                                 Event::SendFailHTLC { ref node_id, ref msg, ref commitment_msg } => {
2584                                         expected_next_node = node_id.clone();
2585                                         next_msgs = Some((msg.clone(), commitment_msg.clone()));
2586                                 },
2587                                 _ => panic!("Unexpected event"),
2588                         };
2589
2590                         prev_node = node;
2591                 }
2592
2593                 assert_eq!(expected_next_node, origin_node.node.get_our_node_id());
2594                 update_fail_dance!(origin_node, expected_route.first().unwrap(), true);
2595
2596                 let events = origin_node.node.get_and_clear_pending_events();
2597                 assert_eq!(events.len(), 1);
2598                 match events[0] {
2599                         Event::PaymentFailed { payment_hash } => {
2600                                 assert_eq!(payment_hash, our_payment_hash);
2601                         },
2602                         _ => panic!("Unexpected event"),
2603                 }
2604         }
2605
2606         fn create_network(node_count: usize) -> Vec<Node> {
2607                 let mut nodes = Vec::new();
2608                 let mut rng = thread_rng();
2609                 let secp_ctx = Secp256k1::new();
2610
2611                 for _ in 0..node_count {
2612                         let feeest = Arc::new(test_utils::TestFeeEstimator { sat_per_kw: 253 });
2613                         let chain_monitor = Arc::new(chaininterface::ChainWatchInterfaceUtil::new());
2614                         let tx_broadcaster = Arc::new(test_utils::TestBroadcaster{txn_broadcasted: Mutex::new(Vec::new())});
2615                         let chan_monitor = Arc::new(test_utils::TestChannelMonitor::new(chain_monitor.clone(), tx_broadcaster.clone()));
2616                         let node_id = {
2617                                 let mut key_slice = [0; 32];
2618                                 rng.fill_bytes(&mut key_slice);
2619                                 SecretKey::from_slice(&secp_ctx, &key_slice).unwrap()
2620                         };
2621                         let node = ChannelManager::new(node_id.clone(), 0, true, Network::Testnet, feeest.clone(), chan_monitor.clone(), chain_monitor.clone(), tx_broadcaster.clone()).unwrap();
2622                         let router = Router::new(PublicKey::from_secret_key(&secp_ctx, &node_id).unwrap());
2623                         nodes.push(Node { feeest, chain_monitor, tx_broadcaster, chan_monitor, node_id, node, router });
2624                 }
2625
2626                 nodes
2627         }
2628
2629         #[test]
2630         fn fake_network_test() {
2631                 // Simple test which builds a network of ChannelManagers, connects them to each other, and
2632                 // tests that payments get routed and transactions broadcast in semi-reasonable ways.
2633                 let nodes = create_network(4);
2634
2635                 // Create some initial channels
2636                 let chan_1 = create_announced_chan_between_nodes(&nodes, 0, 1);
2637                 let chan_2 = create_announced_chan_between_nodes(&nodes, 1, 2);
2638                 let chan_3 = create_announced_chan_between_nodes(&nodes, 2, 3);
2639
2640                 // Rebalance the network a bit by relaying one payment through all the channels...
2641                 send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3])[..], 8000000);
2642                 send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3])[..], 8000000);
2643                 send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3])[..], 8000000);
2644                 send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3])[..], 8000000);
2645
2646                 // Send some more payments
2647                 send_payment(&nodes[1], &vec!(&nodes[2], &nodes[3])[..], 1000000);
2648                 send_payment(&nodes[3], &vec!(&nodes[2], &nodes[1], &nodes[0])[..], 1000000);
2649                 send_payment(&nodes[3], &vec!(&nodes[2], &nodes[1])[..], 1000000);
2650
2651                 // Test failure packets
2652                 let payment_hash_1 = route_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3])[..], 1000000).1;
2653                 fail_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3])[..], payment_hash_1);
2654
2655                 // Add a new channel that skips 3
2656                 let chan_4 = create_announced_chan_between_nodes(&nodes, 1, 3);
2657
2658                 send_payment(&nodes[0], &vec!(&nodes[1], &nodes[3])[..], 1000000);
2659                 send_payment(&nodes[2], &vec!(&nodes[3])[..], 1000000);
2660                 send_payment(&nodes[1], &vec!(&nodes[3])[..], 8000000);
2661                 send_payment(&nodes[1], &vec!(&nodes[3])[..], 8000000);
2662                 send_payment(&nodes[1], &vec!(&nodes[3])[..], 8000000);
2663                 send_payment(&nodes[1], &vec!(&nodes[3])[..], 8000000);
2664                 send_payment(&nodes[1], &vec!(&nodes[3])[..], 8000000);
2665
2666                 // Do some rebalance loop payments, simultaneously
2667                 let mut hops = Vec::with_capacity(3);
2668                 hops.push(RouteHop {
2669                         pubkey: nodes[2].node.get_our_node_id(),
2670                         short_channel_id: chan_2.0.contents.short_channel_id,
2671                         fee_msat: 0,
2672                         cltv_expiry_delta: chan_3.0.contents.cltv_expiry_delta as u32
2673                 });
2674                 hops.push(RouteHop {
2675                         pubkey: nodes[3].node.get_our_node_id(),
2676                         short_channel_id: chan_3.0.contents.short_channel_id,
2677                         fee_msat: 0,
2678                         cltv_expiry_delta: chan_4.1.contents.cltv_expiry_delta as u32
2679                 });
2680                 hops.push(RouteHop {
2681                         pubkey: nodes[1].node.get_our_node_id(),
2682                         short_channel_id: chan_4.0.contents.short_channel_id,
2683                         fee_msat: 1000000,
2684                         cltv_expiry_delta: TEST_FINAL_CLTV,
2685                 });
2686                 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;
2687                 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;
2688                 let payment_preimage_1 = send_along_route(&nodes[1], Route { hops }, &vec!(&nodes[2], &nodes[3], &nodes[1])[..], 1000000).0;
2689
2690                 let mut hops = Vec::with_capacity(3);
2691                 hops.push(RouteHop {
2692                         pubkey: nodes[3].node.get_our_node_id(),
2693                         short_channel_id: chan_4.0.contents.short_channel_id,
2694                         fee_msat: 0,
2695                         cltv_expiry_delta: chan_3.1.contents.cltv_expiry_delta as u32
2696                 });
2697                 hops.push(RouteHop {
2698                         pubkey: nodes[2].node.get_our_node_id(),
2699                         short_channel_id: chan_3.0.contents.short_channel_id,
2700                         fee_msat: 0,
2701                         cltv_expiry_delta: chan_2.1.contents.cltv_expiry_delta as u32
2702                 });
2703                 hops.push(RouteHop {
2704                         pubkey: nodes[1].node.get_our_node_id(),
2705                         short_channel_id: chan_2.0.contents.short_channel_id,
2706                         fee_msat: 1000000,
2707                         cltv_expiry_delta: TEST_FINAL_CLTV,
2708                 });
2709                 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;
2710                 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;
2711                 let payment_hash_2 = send_along_route(&nodes[1], Route { hops }, &vec!(&nodes[3], &nodes[2], &nodes[1])[..], 1000000).1;
2712
2713                 // Claim the rebalances...
2714                 fail_payment(&nodes[1], &vec!(&nodes[3], &nodes[2], &nodes[1])[..], payment_hash_2);
2715                 claim_payment(&nodes[1], &vec!(&nodes[2], &nodes[3], &nodes[1])[..], payment_preimage_1);
2716
2717                 // Add a duplicate new channel from 2 to 4
2718                 let chan_5 = create_announced_chan_between_nodes(&nodes, 1, 3);
2719
2720                 // Send some payments across both channels
2721                 let payment_preimage_3 = route_payment(&nodes[0], &vec!(&nodes[1], &nodes[3])[..], 3000000).0;
2722                 let payment_preimage_4 = route_payment(&nodes[0], &vec!(&nodes[1], &nodes[3])[..], 3000000).0;
2723                 let payment_preimage_5 = route_payment(&nodes[0], &vec!(&nodes[1], &nodes[3])[..], 3000000).0;
2724
2725                 route_over_limit(&nodes[0], &vec!(&nodes[1], &nodes[3])[..], 3000000);
2726
2727                 //TODO: Test that routes work again here as we've been notified that the channel is full
2728
2729                 claim_payment(&nodes[0], &vec!(&nodes[1], &nodes[3])[..], payment_preimage_3);
2730                 claim_payment(&nodes[0], &vec!(&nodes[1], &nodes[3])[..], payment_preimage_4);
2731                 claim_payment(&nodes[0], &vec!(&nodes[1], &nodes[3])[..], payment_preimage_5);
2732
2733                 // Close down the channels...
2734                 close_channel(&nodes[0], &nodes[1], &chan_1.2, chan_1.3, true);
2735                 close_channel(&nodes[1], &nodes[2], &chan_2.2, chan_2.3, false);
2736                 close_channel(&nodes[2], &nodes[3], &chan_3.2, chan_3.3, true);
2737                 close_channel(&nodes[1], &nodes[3], &chan_4.2, chan_4.3, false);
2738                 close_channel(&nodes[1], &nodes[3], &chan_5.2, chan_5.3, false);
2739
2740                 // Check that we processed all pending events
2741                 for node in nodes {
2742                         assert_eq!(node.node.get_and_clear_pending_events().len(), 0);
2743                         assert_eq!(node.chan_monitor.added_monitors.lock().unwrap().len(), 0);
2744                 }
2745         }
2746
2747         #[derive(PartialEq)]
2748         enum HTLCType { NONE, TIMEOUT, SUCCESS }
2749         fn test_txn_broadcast(node: &Node, chan: &(msgs::ChannelUpdate, msgs::ChannelUpdate, [u8; 32], Transaction), commitment_tx: Option<Transaction>, has_htlc_tx: HTLCType) -> Vec<Transaction> {
2750                 let mut node_txn = node.tx_broadcaster.txn_broadcasted.lock().unwrap();
2751                 assert!(node_txn.len() >= if commitment_tx.is_some() { 0 } else { 1 } + if has_htlc_tx == HTLCType::NONE { 0 } else { 1 });
2752
2753                 let mut res = Vec::with_capacity(2);
2754
2755                 if let Some(explicit_tx) = commitment_tx {
2756                         res.push(explicit_tx.clone());
2757                 } else {
2758                         for tx in node_txn.iter() {
2759                                 if tx.input.len() == 1 && tx.input[0].prev_hash == chan.3.txid() {
2760                                         let mut funding_tx_map = HashMap::new();
2761                                         funding_tx_map.insert(chan.3.txid(), chan.3.clone());
2762                                         tx.verify(&funding_tx_map).unwrap();
2763                                         res.push(tx.clone());
2764                                 }
2765                         }
2766                 }
2767                 assert_eq!(res.len(), 1);
2768
2769                 if has_htlc_tx != HTLCType::NONE {
2770                         for tx in node_txn.iter() {
2771                                 if tx.input.len() == 1 && tx.input[0].prev_hash == res[0].txid() {
2772                                         let mut funding_tx_map = HashMap::new();
2773                                         funding_tx_map.insert(res[0].txid(), res[0].clone());
2774                                         tx.verify(&funding_tx_map).unwrap();
2775                                         if has_htlc_tx == HTLCType::TIMEOUT {
2776                                                 assert!(tx.lock_time != 0);
2777                                         } else {
2778                                                 assert!(tx.lock_time == 0);
2779                                         }
2780                                         res.push(tx.clone());
2781                                         break;
2782                                 }
2783                         }
2784                         assert_eq!(res.len(), 2);
2785                 }
2786                 node_txn.clear();
2787                 res
2788         }
2789
2790         fn check_preimage_claim(node: &Node, prev_txn: &Vec<Transaction>) -> Vec<Transaction> {
2791                 let mut node_txn = node.tx_broadcaster.txn_broadcasted.lock().unwrap();
2792
2793                 assert!(node_txn.len() >= 1);
2794                 assert_eq!(node_txn[0].input.len(), 1);
2795                 let mut found_prev = false;
2796
2797                 for tx in prev_txn {
2798                         if node_txn[0].input[0].prev_hash == tx.txid() {
2799                                 let mut funding_tx_map = HashMap::new();
2800                                 funding_tx_map.insert(tx.txid(), tx.clone());
2801                                 node_txn[0].verify(&funding_tx_map).unwrap();
2802
2803                                 assert!(node_txn[0].input[0].witness[2].len() > 106); // must spend an htlc output
2804                                 assert_eq!(tx.input.len(), 1); // must spend a commitment tx
2805
2806                                 found_prev = true;
2807                                 break;
2808                         }
2809                 }
2810                 assert!(found_prev);
2811
2812                 let mut res = Vec::new();
2813                 mem::swap(&mut *node_txn, &mut res);
2814                 res
2815         }
2816
2817         fn get_announce_close_broadcast_events(nodes: &Vec<Node>, a: usize, b: usize) {
2818                 let events_1 = nodes[a].node.get_and_clear_pending_events();
2819                 assert_eq!(events_1.len(), 1);
2820                 let as_update = match events_1[0] {
2821                         Event::BroadcastChannelUpdate { ref msg } => {
2822                                 msg.clone()
2823                         },
2824                         _ => panic!("Unexpected event"),
2825                 };
2826
2827                 let events_2 = nodes[b].node.get_and_clear_pending_events();
2828                 assert_eq!(events_2.len(), 1);
2829                 let bs_update = match events_2[0] {
2830                         Event::BroadcastChannelUpdate { ref msg } => {
2831                                 msg.clone()
2832                         },
2833                         _ => panic!("Unexpected event"),
2834                 };
2835
2836                 for node in nodes {
2837                         node.router.handle_channel_update(&as_update).unwrap();
2838                         node.router.handle_channel_update(&bs_update).unwrap();
2839                 }
2840         }
2841
2842         #[test]
2843         fn channel_monitor_network_test() {
2844                 // Simple test which builds a network of ChannelManagers, connects them to each other, and
2845                 // tests that ChannelMonitor is able to recover from various states.
2846                 let nodes = create_network(5);
2847
2848                 // Create some initial channels
2849                 let chan_1 = create_announced_chan_between_nodes(&nodes, 0, 1);
2850                 let chan_2 = create_announced_chan_between_nodes(&nodes, 1, 2);
2851                 let chan_3 = create_announced_chan_between_nodes(&nodes, 2, 3);
2852                 let chan_4 = create_announced_chan_between_nodes(&nodes, 3, 4);
2853
2854                 // Rebalance the network a bit by relaying one payment through all the channels...
2855                 send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3], &nodes[4])[..], 8000000);
2856                 send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3], &nodes[4])[..], 8000000);
2857                 send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3], &nodes[4])[..], 8000000);
2858                 send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3], &nodes[4])[..], 8000000);
2859
2860                 // Simple case with no pending HTLCs:
2861                 nodes[1].node.peer_disconnected(&nodes[0].node.get_our_node_id(), true);
2862                 {
2863                         let mut node_txn = test_txn_broadcast(&nodes[1], &chan_1, None, HTLCType::NONE);
2864                         let header = BlockHeader { version: 0x20000000, prev_blockhash: Default::default(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
2865                         nodes[0].chain_monitor.block_connected_with_filtering(&Block { header, txdata: vec![node_txn.drain(..).next().unwrap()] }, 1);
2866                         assert_eq!(nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().len(), 0);
2867                 }
2868                 get_announce_close_broadcast_events(&nodes, 0, 1);
2869                 assert_eq!(nodes[0].node.list_channels().len(), 0);
2870                 assert_eq!(nodes[1].node.list_channels().len(), 1);
2871
2872                 // One pending HTLC is discarded by the force-close:
2873                 let payment_preimage_1 = route_payment(&nodes[1], &vec!(&nodes[2], &nodes[3])[..], 3000000).0;
2874
2875                 // Simple case of one pending HTLC to HTLC-Timeout
2876                 nodes[1].node.peer_disconnected(&nodes[2].node.get_our_node_id(), true);
2877                 {
2878                         let mut node_txn = test_txn_broadcast(&nodes[1], &chan_2, None, HTLCType::TIMEOUT);
2879                         let header = BlockHeader { version: 0x20000000, prev_blockhash: Default::default(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
2880                         nodes[2].chain_monitor.block_connected_with_filtering(&Block { header, txdata: vec![node_txn.drain(..).next().unwrap()] }, 1);
2881                         assert_eq!(nodes[2].tx_broadcaster.txn_broadcasted.lock().unwrap().len(), 0);
2882                 }
2883                 get_announce_close_broadcast_events(&nodes, 1, 2);
2884                 assert_eq!(nodes[1].node.list_channels().len(), 0);
2885                 assert_eq!(nodes[2].node.list_channels().len(), 1);
2886
2887                 macro_rules! claim_funds {
2888                         ($node: expr, $prev_node: expr, $preimage: expr) => {
2889                                 {
2890                                         assert!($node.node.claim_funds($preimage));
2891                                         {
2892                                                 let mut added_monitors = $node.chan_monitor.added_monitors.lock().unwrap();
2893                                                 assert_eq!(added_monitors.len(), 1);
2894                                                 added_monitors.clear();
2895                                         }
2896
2897                                         let events = $node.node.get_and_clear_pending_events();
2898                                         assert_eq!(events.len(), 1);
2899                                         match events[0] {
2900                                                 Event::SendFulfillHTLC { ref node_id, .. } => {
2901                                                         assert_eq!(*node_id, $prev_node.node.get_our_node_id());
2902                                                 },
2903                                                 _ => panic!("Unexpected event"),
2904                                         };
2905                                 }
2906                         }
2907                 }
2908
2909                 // nodes[3] gets the preimage, but nodes[2] already disconnected, resulting in a nodes[2]
2910                 // HTLC-Timeout and a nodes[3] claim against it (+ its own announces)
2911                 nodes[2].node.peer_disconnected(&nodes[3].node.get_our_node_id(), true);
2912                 {
2913                         let node_txn = test_txn_broadcast(&nodes[2], &chan_3, None, HTLCType::TIMEOUT);
2914
2915                         // Claim the payment on nodes[3], giving it knowledge of the preimage
2916                         claim_funds!(nodes[3], nodes[2], payment_preimage_1);
2917
2918                         let header = BlockHeader { version: 0x20000000, prev_blockhash: Default::default(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
2919                         nodes[3].chain_monitor.block_connected_with_filtering(&Block { header, txdata: vec![node_txn[0].clone()] }, 1);
2920
2921                         check_preimage_claim(&nodes[3], &node_txn);
2922                 }
2923                 get_announce_close_broadcast_events(&nodes, 2, 3);
2924                 assert_eq!(nodes[2].node.list_channels().len(), 0);
2925                 assert_eq!(nodes[3].node.list_channels().len(), 1);
2926
2927                 // One pending HTLC to time out:
2928                 let payment_preimage_2 = route_payment(&nodes[3], &vec!(&nodes[4])[..], 3000000).0;
2929
2930                 {
2931                         let mut header = BlockHeader { version: 0x20000000, prev_blockhash: Default::default(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
2932                         nodes[3].chain_monitor.block_connected_checked(&header, 1, &Vec::new()[..], &[0; 0]);
2933                         for i in 2..TEST_FINAL_CLTV - 3 {
2934                                 header = BlockHeader { version: 0x20000000, prev_blockhash: header.bitcoin_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
2935                                 nodes[3].chain_monitor.block_connected_checked(&header, i, &Vec::new()[..], &[0; 0]);
2936                         }
2937
2938                         let node_txn = test_txn_broadcast(&nodes[3], &chan_4, None, HTLCType::TIMEOUT);
2939
2940                         // Claim the payment on nodes[3], giving it knowledge of the preimage
2941                         claim_funds!(nodes[4], nodes[3], payment_preimage_2);
2942
2943                         header = BlockHeader { version: 0x20000000, prev_blockhash: Default::default(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
2944                         nodes[4].chain_monitor.block_connected_checked(&header, 1, &Vec::new()[..], &[0; 0]);
2945                         for i in 2..TEST_FINAL_CLTV - 3 {
2946                                 header = BlockHeader { version: 0x20000000, prev_blockhash: header.bitcoin_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
2947                                 nodes[4].chain_monitor.block_connected_checked(&header, i, &Vec::new()[..], &[0; 0]);
2948                         }
2949
2950                         test_txn_broadcast(&nodes[4], &chan_4, None, HTLCType::SUCCESS);
2951
2952                         header = BlockHeader { version: 0x20000000, prev_blockhash: header.bitcoin_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
2953                         nodes[4].chain_monitor.block_connected_with_filtering(&Block { header, txdata: vec![node_txn[0].clone()] }, TEST_FINAL_CLTV - 5);
2954
2955                         check_preimage_claim(&nodes[4], &node_txn);
2956                 }
2957                 get_announce_close_broadcast_events(&nodes, 3, 4);
2958                 assert_eq!(nodes[3].node.list_channels().len(), 0);
2959                 assert_eq!(nodes[4].node.list_channels().len(), 0);
2960
2961                 // Create some new channels:
2962                 let chan_5 = create_announced_chan_between_nodes(&nodes, 0, 1);
2963
2964                 // A pending HTLC which will be revoked:
2965                 let payment_preimage_3 = route_payment(&nodes[0], &vec!(&nodes[1])[..], 3000000).0;
2966                 // Get the will-be-revoked local txn from nodes[0]
2967                 let revoked_local_txn = nodes[0].node.channel_state.lock().unwrap().by_id.iter().next().unwrap().1.last_local_commitment_txn.clone();
2968                 // Revoke the old state
2969                 claim_payment(&nodes[0], &vec!(&nodes[1])[..], payment_preimage_3);
2970
2971                 {
2972                         let mut header = BlockHeader { version: 0x20000000, prev_blockhash: Default::default(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
2973                         nodes[1].chain_monitor.block_connected_with_filtering(&Block { header, txdata: vec![revoked_local_txn[0].clone()] }, 1);
2974                         {
2975                                 let mut node_txn = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap();
2976                                 assert_eq!(node_txn.len(), 1);
2977                                 assert_eq!(node_txn[0].input.len(), 1);
2978
2979                                 let mut funding_tx_map = HashMap::new();
2980                                 funding_tx_map.insert(revoked_local_txn[0].txid(), revoked_local_txn[0].clone());
2981                                 node_txn[0].verify(&funding_tx_map).unwrap();
2982                                 node_txn.clear();
2983                         }
2984
2985                         nodes[0].chain_monitor.block_connected_with_filtering(&Block { header, txdata: vec![revoked_local_txn[0].clone()] }, 1);
2986                         let node_txn = test_txn_broadcast(&nodes[0], &chan_5, Some(revoked_local_txn[0].clone()), HTLCType::TIMEOUT);
2987                         header = BlockHeader { version: 0x20000000, prev_blockhash: header.bitcoin_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
2988                         nodes[1].chain_monitor.block_connected_with_filtering(&Block { header, txdata: vec![node_txn[1].clone()] }, 1);
2989
2990                         //TODO: At this point nodes[1] should claim the revoked HTLC-Timeout output, but that's
2991                         //not yet implemented in ChannelMonitor
2992                 }
2993                 get_announce_close_broadcast_events(&nodes, 0, 1);
2994                 assert_eq!(nodes[0].node.list_channels().len(), 0);
2995                 assert_eq!(nodes[1].node.list_channels().len(), 0);
2996
2997                 // Check that we processed all pending events
2998                 for node in nodes {
2999                         assert_eq!(node.node.get_and_clear_pending_events().len(), 0);
3000                         assert_eq!(node.chan_monitor.added_monitors.lock().unwrap().len(), 0);
3001                 }
3002         }
3003
3004         #[test]
3005         fn test_unconf_chan() {
3006                 // After creating a chan between nodes, we disconnect all blocks previously seen to force a channel close on nodes[0] side
3007                 let nodes = create_network(2);
3008                 create_announced_chan_between_nodes(&nodes, 0, 1);
3009
3010                 let channel_state = nodes[0].node.channel_state.lock().unwrap();
3011                 assert_eq!(channel_state.by_id.len(), 1);
3012                 assert_eq!(channel_state.short_to_id.len(), 1);
3013                 mem::drop(channel_state);
3014
3015                 let mut headers = Vec::new();
3016                 let mut header = BlockHeader { version: 0x20000000, prev_blockhash: Default::default(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
3017                 headers.push(header.clone());
3018                 for _i in 2..100 {
3019                         header = BlockHeader { version: 0x20000000, prev_blockhash: header.bitcoin_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
3020                         headers.push(header.clone());
3021                 }
3022                 while !headers.is_empty() {
3023                         nodes[0].node.block_disconnected(&headers.pop().unwrap());
3024                 }
3025                 let channel_state = nodes[0].node.channel_state.lock().unwrap();
3026                 assert_eq!(channel_state.by_id.len(), 0);
3027                 assert_eq!(channel_state.short_to_id.len(), 0);
3028         }
3029 }