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

   1 //! The top-level channel management and payment tracking stuff lives here.
   2 //!
   3 //! The ChannelManager is the main chunk of logic implementing the lightning protocol and is
   4 //! responsible for tracking which channels are open, HTLCs are in flight and reestablishing those
   5 //! upon reconnect to the relevant peer(s).
   6 //!
   7 //! It does not manage routing logic (see ln::router for that) nor does it manage constructing
   8 //! on-chain transactions (it only monitors the chain to watch for any force-closes that might
   9 //! imply it needs to fail HTLCs/payments/channels it manages).
  10
  11 use bitcoin::blockdata::block::BlockHeader;
  12 use bitcoin::blockdata::transaction::Transaction;
  13 use bitcoin::blockdata::constants::genesis_block;
  14 use bitcoin::network::constants::Network;
  15 use bitcoin::network::serialize::BitcoinHash;
  16 use bitcoin::util::hash::Sha256dHash;
  17
  18 use secp256k1::key::{SecretKey,PublicKey};
  19 use secp256k1::{Secp256k1,Message};
  20 use secp256k1::ecdh::SharedSecret;
  21 use secp256k1;
  22
  23 use chain::chaininterface::{BroadcasterInterface,ChainListener,ChainWatchInterface,FeeEstimator};
  24 use chain::transaction::OutPoint;
  25 use ln::channel::{Channel, ChannelKeys};
  26 use ln::channelmonitor::ManyChannelMonitor;
  27 use ln::router::{Route,RouteHop};
  28 use ln::msgs;
  29 use ln::msgs::{HandleError,ChannelMessageHandler};
  30 use util::configurations::UserConfigurations;
  31 use util::{byte_utils, events, internal_traits, rng};
  32 use util::sha2::Sha256;
  33 use util::ser::{Readable, Writeable};
  34 use util::chacha20poly1305rfc::ChaCha20;
  35 use util::logger::Logger;
  36 use util::errors::APIError;
  37
  38 use crypto;
  39 use crypto::mac::{Mac,MacResult};
  40 use crypto::hmac::Hmac;
  41 use crypto::digest::Digest;
  42 use crypto::symmetriccipher::SynchronousStreamCipher;
  43
  44 use std::{ptr, mem};
  45 use std::collections::HashMap;
  46 use std::collections::hash_map;
  47 use std::io::Cursor;
  48 use std::sync::{Mutex,MutexGuard,Arc};
  49 use std::sync::atomic::{AtomicUsize, Ordering};
  50 use std::time::{Instant,Duration};
  51
  52 /// We hold various information about HTLC relay in the HTLC objects in Channel itself:
  53 ///
  54 /// Upon receipt of an HTLC from a peer, we'll give it a PendingHTLCStatus indicating if it should
  55 /// forward the HTLC with information it will give back to us when it does so, or if it should Fail
  56 /// the HTLC with the relevant message for the Channel to handle giving to the remote peer.
  57 ///
  58 /// When a Channel forwards an HTLC to its peer, it will give us back the PendingForwardHTLCInfo
  59 /// which we will use to construct an outbound HTLC, with a relevant HTLCSource::PreviousHopData
  60 /// filled in to indicate where it came from (which we can use to either fail-backwards or fulfill
  61 /// the HTLC backwards along the relevant path).
  62 /// Alternatively, we can fill an outbound HTLC with a HTLCSource::OutboundRoute indicating this is
  63 /// our payment, which we can use to decode errors or inform the user that the payment was sent.
  64 mod channel_held_info {
  65         use ln::msgs;
  66         use ln::router::Route;
  67         use secp256k1::key::SecretKey;
  68         use secp256k1::ecdh::SharedSecret;
  69
  70         /// Stores the info we will need to send when we want to forward an HTLC onwards
  71         #[derive(Clone)] // See Channel::revoke_and_ack for why, tl;dr: Rust bug
  72         pub struct PendingForwardHTLCInfo {
  73                 pub(super) onion_packet: Option<msgs::OnionPacket>,
  74                 pub(super) incoming_shared_secret: SharedSecret,
  75                 pub(super) payment_hash: [u8; 32],
  76                 pub(super) short_channel_id: u64,
  77                 pub(super) amt_to_forward: u64,
  78                 pub(super) outgoing_cltv_value: u32,
  79         }
  80
  81         #[derive(Clone)] // See Channel::revoke_and_ack for why, tl;dr: Rust bug
  82         pub enum HTLCFailureMsg {
  83                 Relay(msgs::UpdateFailHTLC),
  84                 Malformed(msgs::UpdateFailMalformedHTLC),
  85         }
  86
  87         /// Stores whether we can't forward an HTLC or relevant forwarding info
  88         #[derive(Clone)] // See Channel::revoke_and_ack for why, tl;dr: Rust bug
  89         pub enum PendingHTLCStatus {
  90                 Forward(PendingForwardHTLCInfo),
  91                 Fail(HTLCFailureMsg),
  92         }
  93
  94         /// Tracks the inbound corresponding to an outbound HTLC
  95         #[derive(Clone)]
  96         pub struct HTLCPreviousHopData {
  97                 pub(super) short_channel_id: u64,
  98                 pub(super) htlc_id: u64,
  99                 pub(super) incoming_packet_shared_secret: SharedSecret,
 100         }
 101
 102         /// Tracks the inbound corresponding to an outbound HTLC
 103         #[derive(Clone)]
 104         pub enum HTLCSource {
 105                 PreviousHopData(HTLCPreviousHopData),
 106                 OutboundRoute {
 107                         route: Route,
 108                         session_priv: SecretKey,
 109                 },
 110         }
 111         #[cfg(test)]
 112         impl HTLCSource {
 113                 pub fn dummy() -> Self {
 114                         HTLCSource::OutboundRoute {
 115                                 route: Route { hops: Vec::new() },
 116                                 session_priv: SecretKey::from_slice(&::secp256k1::Secp256k1::without_caps(), &[1; 32]).unwrap(),
 117                         }
 118                 }
 119         }
 120
 121         #[derive(Clone)] // See Channel::revoke_and_ack for why, tl;dr: Rust bug
 122         pub(crate) enum HTLCFailReason {
 123                 ErrorPacket {
 124                         err: msgs::OnionErrorPacket,
 125                 },
 126                 Reason {
 127                         failure_code: u16,
 128                         data: Vec<u8>,
 129                 }
 130         }
 131 }
 132 pub(super) use self::channel_held_info::*;
 133
 134 struct MsgHandleErrInternal {
 135         err: msgs::HandleError,
 136         needs_channel_force_close: bool,
 137 }
 138 impl MsgHandleErrInternal {
 139         #[inline]
 140         fn send_err_msg_no_close(err: &'static str, channel_id: [u8; 32]) -> Self {
 141                 Self {
 142                         err: HandleError {
 143                                 err,
 144                                 action: Some(msgs::ErrorAction::SendErrorMessage {
 145                                         msg: msgs::ErrorMessage {
 146                                                 channel_id,
 147                                                 data: err.to_string()
 148                                         },
 149                                 }),
 150                         },
 151                         needs_channel_force_close: false,
 152                 }
 153         }
 154         #[inline]
 155         fn send_err_msg_close_chan(err: &'static str, channel_id: [u8; 32]) -> Self {
 156                 Self {
 157                         err: HandleError {
 158                                 err,
 159                                 action: Some(msgs::ErrorAction::SendErrorMessage {
 160                                         msg: msgs::ErrorMessage {
 161                                                 channel_id,
 162                                                 data: err.to_string()
 163                                         },
 164                                 }),
 165                         },
 166                         needs_channel_force_close: true,
 167                 }
 168         }
 169         #[inline]
 170         fn from_maybe_close(err: msgs::HandleError) -> Self {
 171                 Self { err, needs_channel_force_close: true }
 172         }
 173         #[inline]
 174         fn from_no_close(err: msgs::HandleError) -> Self {
 175                 Self { err, needs_channel_force_close: false }
 176         }
 177 }
 178
 179 /// We hold back HTLCs we intend to relay for a random interval in the range (this, 5*this). This
 180 /// provides some limited amount of privacy. Ideally this would range from somewhere like 1 second
 181 /// to 30 seconds, but people expect lightning to be, you know, kinda fast, sadly. We could
 182 /// probably increase this significantly.
 183 const MIN_HTLC_RELAY_HOLDING_CELL_MILLIS: u32 = 50;
 184
 185 struct HTLCForwardInfo {
 186         prev_short_channel_id: u64,
 187         prev_htlc_id: u64,
 188         forward_info: PendingForwardHTLCInfo,
 189 }
 190
 191 struct ChannelHolder {
 192         by_id: HashMap<[u8; 32], Channel>,
 193         short_to_id: HashMap<u64, [u8; 32]>,
 194         next_forward: Instant,
 195         /// short channel id -> forward infos. Key of 0 means payments received
 196         /// Note that while this is held in the same mutex as the channels themselves, no consistency
 197         /// guarantees are made about there existing a channel with the short id here, nor the short
 198         /// ids in the PendingForwardHTLCInfo!
 199         forward_htlcs: HashMap<u64, Vec<HTLCForwardInfo>>,
 200         /// Note that while this is held in the same mutex as the channels themselves, no consistency
 201         /// guarantees are made about the channels given here actually existing anymore by the time you
 202         /// go to read them!
 203         claimable_htlcs: HashMap<[u8; 32], Vec<HTLCPreviousHopData>>,
 204 }
 205 struct MutChannelHolder<'a> {
 206         by_id: &'a mut HashMap<[u8; 32], Channel>,
 207         short_to_id: &'a mut HashMap<u64, [u8; 32]>,
 208         next_forward: &'a mut Instant,
 209         forward_htlcs: &'a mut HashMap<u64, Vec<HTLCForwardInfo>>,
 210         claimable_htlcs: &'a mut HashMap<[u8; 32], Vec<HTLCPreviousHopData>>,
 211 }
 212 impl ChannelHolder {
 213         fn borrow_parts(&mut self) -> MutChannelHolder {
 214                 MutChannelHolder {
 215                         by_id: &mut self.by_id,
 216                         short_to_id: &mut self.short_to_id,
 217                         next_forward: &mut self.next_forward,
 218                         forward_htlcs: &mut self.forward_htlcs,
 219                         claimable_htlcs: &mut self.claimable_htlcs,
 220                 }
 221         }
 222 }
 223
 224 #[cfg(not(any(target_pointer_width = "32", target_pointer_width = "64")))]
 225 const ERR: () = "You need at least 32 bit pointers (well, usize, but we'll assume they're the same) for ChannelManager::latest_block_height";
 226
 227 /// Manager which keeps track of a number of channels and sends messages to the appropriate
 228 /// channel, also tracking HTLC preimages and forwarding onion packets appropriately.
 229 ///
 230 /// Implements ChannelMessageHandler, handling the multi-channel parts and passing things through
 231 /// to individual Channels.
 232 pub struct ChannelManager {
 233         configuration : UserConfigurations,
 234         genesis_hash: Sha256dHash,
 235         fee_estimator: Arc<FeeEstimator>,
 236         monitor: Arc<ManyChannelMonitor>,
 237         chain_monitor: Arc<ChainWatchInterface>,
 238         tx_broadcaster: Arc<BroadcasterInterface>,
 239
 240         announce_channels_publicly: bool,
 241         fee_proportional_millionths: u32,
 242         latest_block_height: AtomicUsize,
 243         secp_ctx: Secp256k1<secp256k1::All>,
 244
 245         channel_state: Mutex<ChannelHolder>,
 246         our_network_key: SecretKey,
 247
 248         pending_events: Mutex<Vec<events::Event>>,
 249
 250         logger: Arc<Logger>,
 251 }
 252
 253 const CLTV_EXPIRY_DELTA: u16 = 6 * 24 * 2; //TODO?
 254
 255 macro_rules! secp_call {
 256         ( $res: expr, $err: expr ) => {
 257                 match $res {
 258                         Ok(key) => key,
 259                         Err(_) => return Err($err),
 260                 }
 261         };
 262 }
 263
 264 struct OnionKeys {
 265         #[cfg(test)]
 266         shared_secret: SharedSecret,
 267         #[cfg(test)]
 268         blinding_factor: [u8; 32],
 269         ephemeral_pubkey: PublicKey,
 270         rho: [u8; 32],
 271         mu: [u8; 32],
 272 }
 273
 274 /// Details of a channel, as returned by ChannelManager::list_channels and ChannelManager::list_usable_channels
 275 pub struct ChannelDetails {
 276         /// The channel's ID (prior to funding transaction generation, this is a random 32 bytes,
 277         /// thereafter this is the txid of the funding transaction xor the funding transaction output).
 278         /// Note that this means this value is *not* persistent - it can change once during the
 279         /// lifetime of the channel.
 280         pub channel_id: [u8; 32],
 281         /// The position of the funding transaction in the chain. None if the funding transaction has
 282         /// not yet been confirmed and the channel fully opened.
 283         pub short_channel_id: Option<u64>,
 284         /// The node_id of our counterparty
 285         pub remote_network_id: PublicKey,
 286         /// The value, in satoshis, of this channel as appears in the funding output
 287         pub channel_value_satoshis: u64,
 288         /// The user_id passed in to create_channel, or 0 if the channel was inbound.
 289         pub user_id: u64,
 290 }
 291
 292 impl ChannelManager {
 293         /// Constructs a new ChannelManager to hold several channels and route between them.
 294         ///
 295         /// This is the main "logic hub" for all channel-related actions, and implements
 296         /// ChannelMessageHandler.
 297         ///
 298         /// fee_proportional_millionths is an optional fee to charge any payments routed through us.
 299         /// Non-proportional fees are fixed according to our risk using the provided fee estimator.
 300         ///
 301         /// panics if channel_value_satoshis is >= `MAX_FUNDING_SATOSHIS`!
 302         pub fn new(our_network_key: SecretKey, fee_proportional_millionths: u32, announce_channels_publicly: bool, network: Network, feeest: Arc<FeeEstimator>, monitor: Arc<ManyChannelMonitor>, chain_monitor: Arc<ChainWatchInterface>, tx_broadcaster: Arc<BroadcasterInterface>, logger: Arc<Logger>) -> Result<Arc<ChannelManager>, secp256k1::Error> {
 303                 let secp_ctx = Secp256k1::new();
 304
 305                 let res = Arc::new(ChannelManager {
 306                         configuration : UserConfigurations::new(),
 307                         genesis_hash: genesis_block(network).header.bitcoin_hash(),
 308                         fee_estimator: feeest.clone(),
 309                         monitor: monitor.clone(),
 310                         chain_monitor,
 311                         tx_broadcaster,
 312
 313                         announce_channels_publicly,
 314                         fee_proportional_millionths,
 315                         latest_block_height: AtomicUsize::new(0), //TODO: Get an init value (generally need to replay recent chain on chain_monitor registration)
 316                         secp_ctx,
 317
 318                         channel_state: Mutex::new(ChannelHolder{
 319                                 by_id: HashMap::new(),
 320                                 short_to_id: HashMap::new(),
 321                                 next_forward: Instant::now(),
 322                                 forward_htlcs: HashMap::new(),
 323                                 claimable_htlcs: HashMap::new(),
 324                         }),
 325                         our_network_key,
 326
 327                         pending_events: Mutex::new(Vec::new()),
 328
 329                         logger,
 330                 });
 331                 let weak_res = Arc::downgrade(&res);
 332                 res.chain_monitor.register_listener(weak_res);
 333                 Ok(res)
 334         }
 335
 336         /// Creates a new outbound channel to the given remote node and with the given value.
 337         ///
 338         /// user_id will be provided back as user_channel_id in FundingGenerationReady and
 339         /// FundingBroadcastSafe events to allow tracking of which events correspond with which
 340         /// create_channel call. Note that user_channel_id defaults to 0 for inbound channels, so you
 341         /// may wish to avoid using 0 for user_id here.
 342         ///
 343         /// If successful, will generate a SendOpenChannel event, so you should probably poll
 344         /// PeerManager::process_events afterwards.
 345         ///
 346         /// Raises APIError::APIMisuseError when channel_value_satoshis > 2**24 or push_msat being greater than channel_value_satoshis * 1k
 347         pub fn create_channel(&self, their_network_key: PublicKey, channel_value_satoshis: u64, push_msat: u64, user_id: u64) -> Result<(), APIError> {
 348                 let chan_keys = if cfg!(feature = "fuzztarget") {
 349                         ChannelKeys {
 350                                 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(),
 351                                 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(),
 352                                 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(),
 353                                 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(),
 354                                 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(),
 355                                 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(),
 356                                 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(),
 357                                 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],
 358                         }
 359                 } else {
 360                         let mut key_seed = [0u8; 32];
 361                         rng::fill_bytes(&mut key_seed);
 362                         match ChannelKeys::new_from_seed(&key_seed) {
 363                                 Ok(key) => key,
 364                                 Err(_) => panic!("RNG is busted!")
 365                         }
 366                 };
 367
 368                 let channel = Channel::new_outbound(&*self.fee_estimator, chan_keys, their_network_key, channel_value_satoshis, push_msat, self.announce_channels_publicly, user_id, Arc::clone(&self.logger), &self.configuration)?;
 369                 let res = channel.get_open_channel(self.genesis_hash.clone(), &*self.fee_estimator);
 370                 let mut channel_state = self.channel_state.lock().unwrap();
 371                 match channel_state.by_id.insert(channel.channel_id(), channel) {
 372                         Some(_) => panic!("RNG is bad???"),
 373                         None => {}
 374                 }
 375
 376                 let mut events = self.pending_events.lock().unwrap();
 377                 events.push(events::Event::SendOpenChannel {
 378                         node_id: their_network_key,
 379                         msg: res,
 380                 });
 381                 Ok(())
 382         }
 383
 384         /// Gets the list of open channels, in random order. See ChannelDetail field documentation for
 385         /// more information.
 386         pub fn list_channels(&self) -> Vec<ChannelDetails> {
 387                 let channel_state = self.channel_state.lock().unwrap();
 388                 let mut res = Vec::with_capacity(channel_state.by_id.len());
 389                 for (channel_id, channel) in channel_state.by_id.iter() {
 390                         res.push(ChannelDetails {
 391                                 channel_id: (*channel_id).clone(),
 392                                 short_channel_id: channel.get_short_channel_id(),
 393                                 remote_network_id: channel.get_their_node_id(),
 394                                 channel_value_satoshis: channel.get_value_satoshis(),
 395                                 user_id: channel.get_user_id(),
 396                         });
 397                 }
 398                 res
 399         }
 400
 401         /// Gets the list of usable channels, in random order. Useful as an argument to
 402         /// Router::get_route to ensure non-announced channels are used.
 403         pub fn list_usable_channels(&self) -> Vec<ChannelDetails> {
 404                 let channel_state = self.channel_state.lock().unwrap();
 405                 let mut res = Vec::with_capacity(channel_state.by_id.len());
 406                 for (channel_id, channel) in channel_state.by_id.iter() {
 407                         if channel.is_usable() {
 408                                 res.push(ChannelDetails {
 409                                         channel_id: (*channel_id).clone(),
 410                                         short_channel_id: channel.get_short_channel_id(),
 411                                         remote_network_id: channel.get_their_node_id(),
 412                                         channel_value_satoshis: channel.get_value_satoshis(),
 413                                         user_id: channel.get_user_id(),
 414                                 });
 415                         }
 416                 }
 417                 res
 418         }
 419
 420         /// Begins the process of closing a channel. After this call (plus some timeout), no new HTLCs
 421         /// will be accepted on the given channel, and after additional timeout/the closing of all
 422         /// pending HTLCs, the channel will be closed on chain.
 423         ///
 424         /// May generate a SendShutdown event on success, which should be relayed.
 425         pub fn close_channel(&self, channel_id: &[u8; 32]) -> Result<(), HandleError> {
 426                 let (mut res, node_id, chan_option) = {
 427                         let mut channel_state_lock = self.channel_state.lock().unwrap();
 428                         let channel_state = channel_state_lock.borrow_parts();
 429                         match channel_state.by_id.entry(channel_id.clone()) {
 430                                 hash_map::Entry::Occupied(mut chan_entry) => {
 431                                         let res = chan_entry.get_mut().get_shutdown()?;
 432                                         if chan_entry.get().is_shutdown() {
 433                                                 if let Some(short_id) = chan_entry.get().get_short_channel_id() {
 434                                                         channel_state.short_to_id.remove(&short_id);
 435                                                 }
 436                                                 (res, chan_entry.get().get_their_node_id(), Some(chan_entry.remove_entry().1))
 437                                         } else { (res, chan_entry.get().get_their_node_id(), None) }
 438                                 },
 439                                 hash_map::Entry::Vacant(_) => return Err(HandleError{err: "No such channel", action: None})
 440                         }
 441                 };
 442                 for htlc_source in res.1.drain(..) {
 443                         // unknown_next_peer...I dunno who that is anymore....
 444                         self.fail_htlc_backwards_internal(self.channel_state.lock().unwrap(), htlc_source.0, &htlc_source.1, HTLCFailReason::Reason { failure_code: 0x4000 | 10, data: Vec::new() });
 445                 }
 446                 let chan_update = if let Some(chan) = chan_option {
 447                         if let Ok(update) = self.get_channel_update(&chan) {
 448                                 Some(update)
 449                         } else { None }
 450                 } else { None };
 451
 452                 let mut events = self.pending_events.lock().unwrap();
 453                 if let Some(update) = chan_update {
 454                         events.push(events::Event::BroadcastChannelUpdate {
 455                                 msg: update
 456                         });
 457                 }
 458                 events.push(events::Event::SendShutdown {
 459                         node_id,
 460                         msg: res.0
 461                 });
 462
 463                 Ok(())
 464         }
 465
 466         #[inline]
 467         fn finish_force_close_channel(&self, shutdown_res: (Vec<Transaction>, Vec<(HTLCSource, [u8; 32])>)) {
 468                 let (local_txn, mut failed_htlcs) = shutdown_res;
 469                 for htlc_source in failed_htlcs.drain(..) {
 470                         // unknown_next_peer...I dunno who that is anymore....
 471                         self.fail_htlc_backwards_internal(self.channel_state.lock().unwrap(), htlc_source.0, &htlc_source.1, HTLCFailReason::Reason { failure_code: 0x4000 | 10, data: Vec::new() });
 472                 }
 473                 for tx in local_txn {
 474                         self.tx_broadcaster.broadcast_transaction(&tx);
 475                 }
 476                 //TODO: We need to have a way where outbound HTLC claims can result in us claiming the
 477                 //now-on-chain HTLC output for ourselves (and, thereafter, passing the HTLC backwards).
 478                 //TODO: We need to handle monitoring of pending offered HTLCs which just hit the chain and
 479                 //may be claimed, resulting in us claiming the inbound HTLCs (and back-failing after
 480                 //timeouts are hit and our claims confirm).
 481                 //TODO: In any case, we need to make sure we remove any pending htlc tracking (via
 482                 //fail_backwards or claim_funds) eventually for all HTLCs that were in the channel
 483         }
 484
 485         /// Force closes a channel, immediately broadcasting the latest local commitment transaction to
 486         /// the chain and rejecting new HTLCs on the given channel.
 487         pub fn force_close_channel(&self, channel_id: &[u8; 32]) {
 488                 let mut chan = {
 489                         let mut channel_state_lock = self.channel_state.lock().unwrap();
 490                         let channel_state = channel_state_lock.borrow_parts();
 491                         if let Some(chan) = channel_state.by_id.remove(channel_id) {
 492                                 if let Some(short_id) = chan.get_short_channel_id() {
 493                                         channel_state.short_to_id.remove(&short_id);
 494                                 }
 495                                 chan
 496                         } else {
 497                                 return;
 498                         }
 499                 };
 500                 self.finish_force_close_channel(chan.force_shutdown());
 501                 let mut events = self.pending_events.lock().unwrap();
 502                 if let Ok(update) = self.get_channel_update(&chan) {
 503                         events.push(events::Event::BroadcastChannelUpdate {
 504                                 msg: update
 505                         });
 506                 }
 507         }
 508
 509         /// Force close all channels, immediately broadcasting the latest local commitment transaction
 510         /// for each to the chain and rejecting new HTLCs on each.
 511         pub fn force_close_all_channels(&self) {
 512                 for chan in self.list_channels() {
 513                         self.force_close_channel(&chan.channel_id);
 514                 }
 515         }
 516
 517         #[inline]
 518         fn gen_rho_mu_from_shared_secret(shared_secret: &SharedSecret) -> ([u8; 32], [u8; 32]) {
 519                 ({
 520                         let mut hmac = Hmac::new(Sha256::new(), &[0x72, 0x68, 0x6f]); // rho
 521                         hmac.input(&shared_secret[..]);
 522                         let mut res = [0; 32];
 523                         hmac.raw_result(&mut res);
 524                         res
 525                 },
 526                 {
 527                         let mut hmac = Hmac::new(Sha256::new(), &[0x6d, 0x75]); // mu
 528                         hmac.input(&shared_secret[..]);
 529                         let mut res = [0; 32];
 530                         hmac.raw_result(&mut res);
 531                         res
 532                 })
 533         }
 534
 535         #[inline]
 536         fn gen_um_from_shared_secret(shared_secret: &SharedSecret) -> [u8; 32] {
 537                 let mut hmac = Hmac::new(Sha256::new(), &[0x75, 0x6d]); // um
 538                 hmac.input(&shared_secret[..]);
 539                 let mut res = [0; 32];
 540                 hmac.raw_result(&mut res);
 541                 res
 542         }
 543
 544         #[inline]
 545         fn gen_ammag_from_shared_secret(shared_secret: &SharedSecret) -> [u8; 32] {
 546                 let mut hmac = Hmac::new(Sha256::new(), &[0x61, 0x6d, 0x6d, 0x61, 0x67]); // ammag
 547                 hmac.input(&shared_secret[..]);
 548                 let mut res = [0; 32];
 549                 hmac.raw_result(&mut res);
 550                 res
 551         }
 552
 553         // can only fail if an intermediary hop has an invalid public key or session_priv is invalid
 554         #[inline]
 555         fn construct_onion_keys_callback<T: secp256k1::Signing, FType: FnMut(SharedSecret, [u8; 32], PublicKey, &RouteHop)> (secp_ctx: &Secp256k1<T>, route: &Route, session_priv: &SecretKey, mut callback: FType) -> Result<(), secp256k1::Error> {
 556                 let mut blinded_priv = session_priv.clone();
 557                 let mut blinded_pub = PublicKey::from_secret_key(secp_ctx, &blinded_priv);
 558
 559                 for hop in route.hops.iter() {
 560                         let shared_secret = SharedSecret::new(secp_ctx, &hop.pubkey, &blinded_priv);
 561
 562                         let mut sha = Sha256::new();
 563                         sha.input(&blinded_pub.serialize()[..]);
 564                         sha.input(&shared_secret[..]);
 565                         let mut blinding_factor = [0u8; 32];
 566                         sha.result(&mut blinding_factor);
 567
 568                         let ephemeral_pubkey = blinded_pub;
 569
 570                         blinded_priv.mul_assign(secp_ctx, &SecretKey::from_slice(secp_ctx, &blinding_factor)?)?;
 571                         blinded_pub = PublicKey::from_secret_key(secp_ctx, &blinded_priv);
 572
 573                         callback(shared_secret, blinding_factor, ephemeral_pubkey, hop);
 574                 }
 575
 576                 Ok(())
 577         }
 578
 579         // can only fail if an intermediary hop has an invalid public key or session_priv is invalid
 580         fn construct_onion_keys<T: secp256k1::Signing>(secp_ctx: &Secp256k1<T>, route: &Route, session_priv: &SecretKey) -> Result<Vec<OnionKeys>, secp256k1::Error> {
 581                 let mut res = Vec::with_capacity(route.hops.len());
 582
 583                 Self::construct_onion_keys_callback(secp_ctx, route, session_priv, |shared_secret, _blinding_factor, ephemeral_pubkey, _| {
 584                         let (rho, mu) = ChannelManager::gen_rho_mu_from_shared_secret(&shared_secret);
 585
 586                         res.push(OnionKeys {
 587                                 #[cfg(test)]
 588                                 shared_secret,
 589                                 #[cfg(test)]
 590                                 blinding_factor: _blinding_factor,
 591                                 ephemeral_pubkey,
 592                                 rho,
 593                                 mu,
 594                         });
 595                 })?;
 596
 597                 Ok(res)
 598         }
 599
 600         /// returns the hop data, as well as the first-hop value_msat and CLTV value we should send.
 601         fn build_onion_payloads(route: &Route, starting_htlc_offset: u32) -> Result<(Vec<msgs::OnionHopData>, u64, u32), APIError> {
 602                 let mut cur_value_msat = 0u64;
 603                 let mut cur_cltv = starting_htlc_offset;
 604                 let mut last_short_channel_id = 0;
 605                 let mut res: Vec<msgs::OnionHopData> = Vec::with_capacity(route.hops.len());
 606                 internal_traits::test_no_dealloc::<msgs::OnionHopData>(None);
 607                 unsafe { res.set_len(route.hops.len()); }
 608
 609                 for (idx, hop) in route.hops.iter().enumerate().rev() {
 610                         // First hop gets special values so that it can check, on receipt, that everything is
 611                         // exactly as it should be (and the next hop isn't trying to probe to find out if we're
 612                         // the intended recipient).
 613                         let value_msat = if cur_value_msat == 0 { hop.fee_msat } else { cur_value_msat };
 614                         let cltv = if cur_cltv == starting_htlc_offset { hop.cltv_expiry_delta + starting_htlc_offset } else { cur_cltv };
 615                         res[idx] = msgs::OnionHopData {
 616                                 realm: 0,
 617                                 data: msgs::OnionRealm0HopData {
 618                                         short_channel_id: last_short_channel_id,
 619                                         amt_to_forward: value_msat,
 620                                         outgoing_cltv_value: cltv,
 621                                 },
 622                                 hmac: [0; 32],
 623                         };
 624                         cur_value_msat += hop.fee_msat;
 625                         if cur_value_msat >= 21000000 * 100000000 * 1000 {
 626                                 return Err(APIError::RouteError{err: "Channel fees overflowed?!"});
 627                         }
 628                         cur_cltv += hop.cltv_expiry_delta as u32;
 629                         if cur_cltv >= 500000000 {
 630                                 return Err(APIError::RouteError{err: "Channel CLTV overflowed?!"});
 631                         }
 632                         last_short_channel_id = hop.short_channel_id;
 633                 }
 634                 Ok((res, cur_value_msat, cur_cltv))
 635         }
 636
 637         #[inline]
 638         fn shift_arr_right(arr: &mut [u8; 20*65]) {
 639                 unsafe {
 640                         ptr::copy(arr[0..].as_ptr(), arr[65..].as_mut_ptr(), 19*65);
 641                 }
 642                 for i in 0..65 {
 643                         arr[i] = 0;
 644                 }
 645         }
 646
 647         #[inline]
 648         fn xor_bufs(dst: &mut[u8], src: &[u8]) {
 649                 assert_eq!(dst.len(), src.len());
 650
 651                 for i in 0..dst.len() {
 652                         dst[i] ^= src[i];
 653                 }
 654         }
 655
 656         const ZERO:[u8; 21*65] = [0; 21*65];
 657         fn construct_onion_packet(mut payloads: Vec<msgs::OnionHopData>, onion_keys: Vec<OnionKeys>, associated_data: &[u8; 32]) -> msgs::OnionPacket {
 658                 let mut buf = Vec::with_capacity(21*65);
 659                 buf.resize(21*65, 0);
 660
 661                 let filler = {
 662                         let iters = payloads.len() - 1;
 663                         let end_len = iters * 65;
 664                         let mut res = Vec::with_capacity(end_len);
 665                         res.resize(end_len, 0);
 666
 667                         for (i, keys) in onion_keys.iter().enumerate() {
 668                                 if i == payloads.len() - 1 { continue; }
 669                                 let mut chacha = ChaCha20::new(&keys.rho, &[0u8; 8]);
 670                                 chacha.process(&ChannelManager::ZERO, &mut buf); // We don't have a seek function :(
 671                                 ChannelManager::xor_bufs(&mut res[0..(i + 1)*65], &buf[(20 - i)*65..21*65]);
 672                         }
 673                         res
 674                 };
 675
 676                 let mut packet_data = [0; 20*65];
 677                 let mut hmac_res = [0; 32];
 678
 679                 for (i, (payload, keys)) in payloads.iter_mut().zip(onion_keys.iter()).rev().enumerate() {
 680                         ChannelManager::shift_arr_right(&mut packet_data);
 681                         payload.hmac = hmac_res;
 682                         packet_data[0..65].copy_from_slice(&payload.encode()[..]);
 683
 684                         let mut chacha = ChaCha20::new(&keys.rho, &[0u8; 8]);
 685                         chacha.process(&packet_data, &mut buf[0..20*65]);
 686                         packet_data[..].copy_from_slice(&buf[0..20*65]);
 687
 688                         if i == 0 {
 689                                 packet_data[20*65 - filler.len()..20*65].copy_from_slice(&filler[..]);
 690                         }
 691
 692                         let mut hmac = Hmac::new(Sha256::new(), &keys.mu);
 693                         hmac.input(&packet_data);
 694                         hmac.input(&associated_data[..]);
 695                         hmac.raw_result(&mut hmac_res);
 696                 }
 697
 698                 msgs::OnionPacket{
 699                         version: 0,
 700                         public_key: Ok(onion_keys.first().unwrap().ephemeral_pubkey),
 701                         hop_data: packet_data,
 702                         hmac: hmac_res,
 703                 }
 704         }
 705
 706         /// Encrypts a failure packet. raw_packet can either be a
 707         /// msgs::DecodedOnionErrorPacket.encode() result or a msgs::OnionErrorPacket.data element.
 708         fn encrypt_failure_packet(shared_secret: &SharedSecret, raw_packet: &[u8]) -> msgs::OnionErrorPacket {
 709                 let ammag = ChannelManager::gen_ammag_from_shared_secret(&shared_secret);
 710
 711                 let mut packet_crypted = Vec::with_capacity(raw_packet.len());
 712                 packet_crypted.resize(raw_packet.len(), 0);
 713                 let mut chacha = ChaCha20::new(&ammag, &[0u8; 8]);
 714                 chacha.process(&raw_packet, &mut packet_crypted[..]);
 715                 msgs::OnionErrorPacket {
 716                         data: packet_crypted,
 717                 }
 718         }
 719
 720         fn build_failure_packet(shared_secret: &SharedSecret, failure_type: u16, failure_data: &[u8]) -> msgs::DecodedOnionErrorPacket {
 721                 assert!(failure_data.len() <= 256 - 2);
 722
 723                 let um = ChannelManager::gen_um_from_shared_secret(&shared_secret);
 724
 725                 let failuremsg = {
 726                         let mut res = Vec::with_capacity(2 + failure_data.len());
 727                         res.push(((failure_type >> 8) & 0xff) as u8);
 728                         res.push(((failure_type >> 0) & 0xff) as u8);
 729                         res.extend_from_slice(&failure_data[..]);
 730                         res
 731                 };
 732                 let pad = {
 733                         let mut res = Vec::with_capacity(256 - 2 - failure_data.len());
 734                         res.resize(256 - 2 - failure_data.len(), 0);
 735                         res
 736                 };
 737                 let mut packet = msgs::DecodedOnionErrorPacket {
 738                         hmac: [0; 32],
 739                         failuremsg: failuremsg,
 740                         pad: pad,
 741                 };
 742
 743                 let mut hmac = Hmac::new(Sha256::new(), &um);
 744                 hmac.input(&packet.encode()[32..]);
 745                 hmac.raw_result(&mut packet.hmac);
 746
 747                 packet
 748         }
 749
 750         #[inline]
 751         fn build_first_hop_failure_packet(shared_secret: &SharedSecret, failure_type: u16, failure_data: &[u8]) -> msgs::OnionErrorPacket {
 752                 let failure_packet = ChannelManager::build_failure_packet(shared_secret, failure_type, failure_data);
 753                 ChannelManager::encrypt_failure_packet(shared_secret, &failure_packet.encode()[..])
 754         }
 755
 756         fn decode_update_add_htlc_onion(&self, msg: &msgs::UpdateAddHTLC) -> (PendingHTLCStatus, MutexGuard<ChannelHolder>) {
 757                 macro_rules! get_onion_hash {
 758                         () => {
 759                                 {
 760                                         let mut sha = Sha256::new();
 761                                         sha.input(&msg.onion_routing_packet.hop_data);
 762                                         let mut onion_hash = [0; 32];
 763                                         sha.result(&mut onion_hash);
 764                                         onion_hash
 765                                 }
 766                         }
 767                 }
 768
 769                 if let Err(_) = msg.onion_routing_packet.public_key {
 770                         log_info!(self, "Failed to accept/forward incoming HTLC with invalid ephemeral pubkey");
 771                         return (PendingHTLCStatus::Fail(HTLCFailureMsg::Malformed(msgs::UpdateFailMalformedHTLC {
 772                                 channel_id: msg.channel_id,
 773                                 htlc_id: msg.htlc_id,
 774                                 sha256_of_onion: get_onion_hash!(),
 775                                 failure_code: 0x8000 | 0x4000 | 6,
 776                         })), self.channel_state.lock().unwrap());
 777                 }
 778
 779                 let shared_secret = SharedSecret::new(&self.secp_ctx, &msg.onion_routing_packet.public_key.unwrap(), &self.our_network_key);
 780                 let (rho, mu) = ChannelManager::gen_rho_mu_from_shared_secret(&shared_secret);
 781
 782                 let mut channel_state = None;
 783                 macro_rules! return_err {
 784                         ($msg: expr, $err_code: expr, $data: expr) => {
 785                                 {
 786                                         log_info!(self, "Failed to accept/forward incoming HTLC: {}", $msg);
 787                                         if channel_state.is_none() {
 788                                                 channel_state = Some(self.channel_state.lock().unwrap());
 789                                         }
 790                                         return (PendingHTLCStatus::Fail(HTLCFailureMsg::Relay(msgs::UpdateFailHTLC {
 791                                                 channel_id: msg.channel_id,
 792                                                 htlc_id: msg.htlc_id,
 793                                                 reason: ChannelManager::build_first_hop_failure_packet(&shared_secret, $err_code, $data),
 794                                         })), channel_state.unwrap());
 795                                 }
 796                         }
 797                 }
 798
 799                 if msg.onion_routing_packet.version != 0 {
 800                         //TODO: Spec doesn't indicate if we should only hash hop_data here (and in other
 801                         //sha256_of_onion error data packets), or the entire onion_routing_packet. Either way,
 802                         //the hash doesn't really serve any purpuse - in the case of hashing all data, the
 803                         //receiving node would have to brute force to figure out which version was put in the
 804                         //packet by the node that send us the message, in the case of hashing the hop_data, the
 805                         //node knows the HMAC matched, so they already know what is there...
 806                         return_err!("Unknown onion packet version", 0x8000 | 0x4000 | 4, &get_onion_hash!());
 807                 }
 808
 809                 let mut hmac = Hmac::new(Sha256::new(), &mu);
 810                 hmac.input(&msg.onion_routing_packet.hop_data);
 811                 hmac.input(&msg.payment_hash);
 812                 if hmac.result() != MacResult::new(&msg.onion_routing_packet.hmac) {
 813                         return_err!("HMAC Check failed", 0x8000 | 0x4000 | 5, &get_onion_hash!());
 814                 }
 815
 816                 let mut chacha = ChaCha20::new(&rho, &[0u8; 8]);
 817                 let next_hop_data = {
 818                         let mut decoded = [0; 65];
 819                         chacha.process(&msg.onion_routing_packet.hop_data[0..65], &mut decoded);
 820                         match msgs::OnionHopData::read(&mut Cursor::new(&decoded[..])) {
 821                                 Err(err) => {
 822                                         let error_code = match err {
 823                                                 msgs::DecodeError::UnknownVersion => 0x4000 | 1, // unknown realm byte
 824                                                 _ => 0x2000 | 2, // Should never happen
 825                                         };
 826                                         return_err!("Unable to decode our hop data", error_code, &[0;0]);
 827                                 },
 828                                 Ok(msg) => msg
 829                         }
 830                 };
 831
 832                 //TODO: Check that msg.cltv_expiry is within acceptable bounds!
 833
 834                 let pending_forward_info = if next_hop_data.hmac == [0; 32] {
 835                                 // OUR PAYMENT!
 836                                 if next_hop_data.data.amt_to_forward != msg.amount_msat {
 837                                         return_err!("Upstream node sent less than we were supposed to receive in payment", 19, &byte_utils::be64_to_array(msg.amount_msat));
 838                                 }
 839                                 if next_hop_data.data.outgoing_cltv_value != msg.cltv_expiry {
 840                                         return_err!("Upstream node set CLTV to the wrong value", 18, &byte_utils::be32_to_array(msg.cltv_expiry));
 841                                 }
 842
 843                                 // Note that we could obviously respond immediately with an update_fulfill_htlc
 844                                 // message, however that would leak that we are the recipient of this payment, so
 845                                 // instead we stay symmetric with the forwarding case, only responding (after a
 846                                 // delay) once they've send us a commitment_signed!
 847
 848                                 PendingHTLCStatus::Forward(PendingForwardHTLCInfo {
 849                                         onion_packet: None,
 850                                         payment_hash: msg.payment_hash.clone(),
 851                                         short_channel_id: 0,
 852                                         incoming_shared_secret: shared_secret.clone(),
 853                                         amt_to_forward: next_hop_data.data.amt_to_forward,
 854                                         outgoing_cltv_value: next_hop_data.data.outgoing_cltv_value,
 855                                 })
 856                         } else {
 857                                 let mut new_packet_data = [0; 20*65];
 858                                 chacha.process(&msg.onion_routing_packet.hop_data[65..], &mut new_packet_data[0..19*65]);
 859                                 chacha.process(&ChannelManager::ZERO[0..65], &mut new_packet_data[19*65..]);
 860
 861                                 let mut new_pubkey = msg.onion_routing_packet.public_key.unwrap();
 862
 863                                 let blinding_factor = {
 864                                         let mut sha = Sha256::new();
 865                                         sha.input(&new_pubkey.serialize()[..]);
 866                                         sha.input(&shared_secret[..]);
 867                                         let mut res = [0u8; 32];
 868                                         sha.result(&mut res);
 869                                         match SecretKey::from_slice(&self.secp_ctx, &res) {
 870                                                 Err(_) => {
 871                                                         return_err!("Blinding factor is an invalid private key", 0x8000 | 0x4000 | 6, &get_onion_hash!());
 872                                                 },
 873                                                 Ok(key) => key
 874                                         }
 875                                 };
 876
 877                                 if let Err(_) = new_pubkey.mul_assign(&self.secp_ctx, &blinding_factor) {
 878                                         return_err!("New blinding factor is an invalid private key", 0x8000 | 0x4000 | 6, &get_onion_hash!());
 879                                 }
 880
 881                                 let outgoing_packet = msgs::OnionPacket {
 882                                         version: 0,
 883                                         public_key: Ok(new_pubkey),
 884                                         hop_data: new_packet_data,
 885                                         hmac: next_hop_data.hmac.clone(),
 886                                 };
 887
 888                                 PendingHTLCStatus::Forward(PendingForwardHTLCInfo {
 889                                         onion_packet: Some(outgoing_packet),
 890                                         payment_hash: msg.payment_hash.clone(),
 891                                         short_channel_id: next_hop_data.data.short_channel_id,
 892                                         incoming_shared_secret: shared_secret.clone(),
 893                                         amt_to_forward: next_hop_data.data.amt_to_forward,
 894                                         outgoing_cltv_value: next_hop_data.data.outgoing_cltv_value,
 895                                 })
 896                         };
 897
 898                 channel_state = Some(self.channel_state.lock().unwrap());
 899                 if let &PendingHTLCStatus::Forward(PendingForwardHTLCInfo { ref onion_packet, ref short_channel_id, ref amt_to_forward, ref outgoing_cltv_value, .. }) = &pending_forward_info {
 900                         if onion_packet.is_some() { // If short_channel_id is 0 here, we'll reject them in the body here
 901                                 let id_option = channel_state.as_ref().unwrap().short_to_id.get(&short_channel_id).cloned();
 902                                 let forwarding_id = match id_option {
 903                                         None => {
 904                                                 return_err!("Don't have available channel for forwarding as requested.", 0x4000 | 10, &[0;0]);
 905                                         },
 906                                         Some(id) => id.clone(),
 907                                 };
 908                                 if let Some((err, code, chan_update)) = {
 909                                         let chan = channel_state.as_mut().unwrap().by_id.get_mut(&forwarding_id).unwrap();
 910                                         if !chan.is_live() {
 911                                                 Some(("Forwarding channel is not in a ready state.", 0x1000 | 7, self.get_channel_update(chan).unwrap()))
 912                                         } else {
 913                                                 let fee = amt_to_forward.checked_mul(self.fee_proportional_millionths as u64).and_then(|prop_fee| { (prop_fee / 1000000).checked_add(chan.get_our_fee_base_msat(&*self.fee_estimator) as u64) });
 914                                                 if fee.is_none() || msg.amount_msat < fee.unwrap() || (msg.amount_msat - fee.unwrap()) < *amt_to_forward {
 915                                                         Some(("Prior hop has deviated from specified fees parameters or origin node has obsolete ones", 0x1000 | 12, self.get_channel_update(chan).unwrap()))
 916                                                 } else {
 917                                                         if (msg.cltv_expiry as u64) < (*outgoing_cltv_value) as u64 + CLTV_EXPIRY_DELTA as u64 {
 918                                                                 Some(("Forwarding node has tampered with the intended HTLC values or origin node has an obsolete cltv_expiry_delta", 0x1000 | 13, self.get_channel_update(chan).unwrap()))
 919                                                         } else {
 920                                                                 None
 921                                                         }
 922                                                 }
 923                                         }
 924                                 } {
 925                                         return_err!(err, code, &chan_update.encode_with_len()[..]);
 926                                 }
 927                         }
 928                 }
 929
 930                 (pending_forward_info, channel_state.unwrap())
 931         }
 932
 933         /// only fails if the channel does not yet have an assigned short_id
 934         fn get_channel_update(&self, chan: &Channel) -> Result<msgs::ChannelUpdate, HandleError> {
 935                 let short_channel_id = match chan.get_short_channel_id() {
 936                         None => return Err(HandleError{err: "Channel not yet established", action: None}),
 937                         Some(id) => id,
 938                 };
 939
 940                 let were_node_one = PublicKey::from_secret_key(&self.secp_ctx, &self.our_network_key).serialize()[..] < chan.get_their_node_id().serialize()[..];
 941
 942                 let unsigned = msgs::UnsignedChannelUpdate {
 943                         chain_hash: self.genesis_hash,
 944                         short_channel_id: short_channel_id,
 945                         timestamp: chan.get_channel_update_count(),
 946                         flags: (!were_node_one) as u16 | ((!chan.is_live() as u16) << 1),
 947                         cltv_expiry_delta: CLTV_EXPIRY_DELTA,
 948                         htlc_minimum_msat: chan.get_our_htlc_minimum_msat(),
 949                         fee_base_msat: chan.get_our_fee_base_msat(&*self.fee_estimator),
 950                         fee_proportional_millionths: self.fee_proportional_millionths,
 951                         excess_data: Vec::new(),
 952                 };
 953
 954                 let msg_hash = Sha256dHash::from_data(&unsigned.encode()[..]);
 955                 let sig = self.secp_ctx.sign(&Message::from_slice(&msg_hash[..]).unwrap(), &self.our_network_key); //TODO Can we unwrap here?
 956
 957                 Ok(msgs::ChannelUpdate {
 958                         signature: sig,
 959                         contents: unsigned
 960                 })
 961         }
 962
 963         /// Sends a payment along a given route.
 964         ///
 965         /// Value parameters are provided via the last hop in route, see documentation for RouteHop
 966         /// fields for more info.
 967         ///
 968         /// Note that if the payment_hash already exists elsewhere (eg you're sending a duplicative
 969         /// payment), we don't do anything to stop you! We always try to ensure that if the provided
 970         /// next hop knows the preimage to payment_hash they can claim an additional amount as
 971         /// specified in the last hop in the route! Thus, you should probably do your own
 972         /// payment_preimage tracking (which you should already be doing as they represent "proof of
 973         /// payment") and prevent double-sends yourself.
 974         ///
 975         /// May generate a SendHTLCs event on success, which should be relayed.
 976         ///
 977         /// Raises APIError::RoutError when invalid route or forward parameter
 978         /// (cltv_delta, fee, node public key) is specified
 979         pub fn send_payment(&self, route: Route, payment_hash: [u8; 32]) -> Result<(), APIError> {
 980                 if route.hops.len() < 1 || route.hops.len() > 20 {
 981                         return Err(APIError::RouteError{err: "Route didn't go anywhere/had bogus size"});
 982                 }
 983                 let our_node_id = self.get_our_node_id();
 984                 for (idx, hop) in route.hops.iter().enumerate() {
 985                         if idx != route.hops.len() - 1 && hop.pubkey == our_node_id {
 986                                 return Err(APIError::RouteError{err: "Route went through us but wasn't a simple rebalance loop to us"});
 987                         }
 988                 }
 989
 990                 let session_priv = SecretKey::from_slice(&self.secp_ctx, &{
 991                         let mut session_key = [0; 32];
 992                         rng::fill_bytes(&mut session_key);
 993                         session_key
 994                 }).expect("RNG is bad!");
 995
 996                 let cur_height = self.latest_block_height.load(Ordering::Acquire) as u32 + 1;
 997
 998                 let onion_keys = secp_call!(ChannelManager::construct_onion_keys(&self.secp_ctx, &route, &session_priv),
 999                                 APIError::RouteError{err: "Pubkey along hop was maliciously selected"});
1000                 let (onion_payloads, htlc_msat, htlc_cltv) = ChannelManager::build_onion_payloads(&route, cur_height)?;
1001                 let onion_packet = ChannelManager::construct_onion_packet(onion_payloads, onion_keys, &payment_hash);
1002
1003                 let (first_hop_node_id, (update_add, commitment_signed, chan_monitor)) = {
1004                         let mut channel_state_lock = self.channel_state.lock().unwrap();
1005                         let channel_state = channel_state_lock.borrow_parts();
1006
1007                         let id = match channel_state.short_to_id.get(&route.hops.first().unwrap().short_channel_id) {
1008                                 None => return Err(APIError::RouteError{err: "No channel available with first hop!"}),
1009                                 Some(id) => id.clone(),
1010                         };
1011
1012                         let res = {
1013                                 let chan = channel_state.by_id.get_mut(&id).unwrap();
1014                                 if chan.get_their_node_id() != route.hops.first().unwrap().pubkey {
1015                                         return Err(APIError::RouteError{err: "Node ID mismatch on first hop!"});
1016                                 }
1017                                 if !chan.is_live() {
1018                                         return Err(APIError::RouteError{err: "Peer for first hop currently disconnected!"});
1019                                 }
1020                                 chan.send_htlc_and_commit(htlc_msat, payment_hash.clone(), htlc_cltv, HTLCSource::OutboundRoute {
1021                                         route: route.clone(),
1022                                         session_priv: session_priv.clone(),
1023                                 }, onion_packet).map_err(|he| APIError::RouteError{err: he.err})?
1024                         };
1025
1026                         let first_hop_node_id = route.hops.first().unwrap().pubkey;
1027
1028                         match res {
1029                                 Some(msgs) => (first_hop_node_id, msgs),
1030                                 None => return Ok(()),
1031                         }
1032                 };
1033
1034                 if let Err(_e) = self.monitor.add_update_monitor(chan_monitor.get_funding_txo().unwrap(), chan_monitor) {
1035                         unimplemented!();
1036                 }
1037
1038                 let mut events = self.pending_events.lock().unwrap();
1039                 events.push(events::Event::UpdateHTLCs {
1040                         node_id: first_hop_node_id,
1041                         updates: msgs::CommitmentUpdate {
1042                                 update_add_htlcs: vec![update_add],
1043                                 update_fulfill_htlcs: Vec::new(),
1044                                 update_fail_htlcs: Vec::new(),
1045                                 update_fail_malformed_htlcs: Vec::new(),
1046                                 commitment_signed,
1047                         },
1048                 });
1049                 Ok(())
1050         }
1051
1052         /// Call this upon creation of a funding transaction for the given channel.
1053         ///
1054         /// Panics if a funding transaction has already been provided for this channel.
1055         ///
1056         /// May panic if the funding_txo is duplicative with some other channel (note that this should
1057         /// be trivially prevented by using unique funding transaction keys per-channel).
1058         pub fn funding_transaction_generated(&self, temporary_channel_id: &[u8; 32], funding_txo: OutPoint) {
1059
1060                 macro_rules! add_pending_event {
1061                         ($event: expr) => {
1062                                 {
1063                                         let mut pending_events = self.pending_events.lock().unwrap();
1064                                         pending_events.push($event);
1065                                 }
1066                         }
1067                 }
1068
1069                 let (chan, msg, chan_monitor) = {
1070                         let mut channel_state = self.channel_state.lock().unwrap();
1071                         match channel_state.by_id.remove(temporary_channel_id) {
1072                                 Some(mut chan) => {
1073                                         match chan.get_outbound_funding_created(funding_txo) {
1074                                                 Ok(funding_msg) => {
1075                                                         (chan, funding_msg.0, funding_msg.1)
1076                                                 },
1077                                                 Err(e) => {
1078                                                         log_error!(self, "Got bad signatures: {}!", e.err);
1079                                                         mem::drop(channel_state);
1080                                                         add_pending_event!(events::Event::HandleError {
1081                                                                 node_id: chan.get_their_node_id(),
1082                                                                 action: e.action,
1083                                                         });
1084                                                         return;
1085                                                 },
1086                                         }
1087                                 },
1088                                 None => return
1089                         }
1090                 }; // Release channel lock for install_watch_outpoint call,
1091                 if let Err(_e) = self.monitor.add_update_monitor(chan_monitor.get_funding_txo().unwrap(), chan_monitor) {
1092                         unimplemented!();
1093                 }
1094                 add_pending_event!(events::Event::SendFundingCreated {
1095                         node_id: chan.get_their_node_id(),
1096                         msg: msg,
1097                 });
1098
1099                 let mut channel_state = self.channel_state.lock().unwrap();
1100                 match channel_state.by_id.entry(chan.channel_id()) {
1101                         hash_map::Entry::Occupied(_) => {
1102                                 panic!("Generated duplicate funding txid?");
1103                         },
1104                         hash_map::Entry::Vacant(e) => {
1105                                 e.insert(chan);
1106                         }
1107                 }
1108         }
1109
1110         fn get_announcement_sigs(&self, chan: &Channel) -> Option<msgs::AnnouncementSignatures> {
1111                 if !chan.should_announce() { return None }
1112
1113                 let (announcement, our_bitcoin_sig) = match chan.get_channel_announcement(self.get_our_node_id(), self.genesis_hash.clone()) {
1114                         Ok(res) => res,
1115                         Err(_) => return None, // Only in case of state precondition violations eg channel is closing
1116                 };
1117                 let msghash = Message::from_slice(&Sha256dHash::from_data(&announcement.encode()[..])[..]).unwrap();
1118                 let our_node_sig = self.secp_ctx.sign(&msghash, &self.our_network_key);
1119
1120                 Some(msgs::AnnouncementSignatures {
1121                         channel_id: chan.channel_id(),
1122                         short_channel_id: chan.get_short_channel_id().unwrap(),
1123                         node_signature: our_node_sig,
1124                         bitcoin_signature: our_bitcoin_sig,
1125                 })
1126         }
1127
1128         /// Processes HTLCs which are pending waiting on random forward delay.
1129         ///
1130         /// Should only really ever be called in response to an PendingHTLCsForwardable event.
1131         /// Will likely generate further events.
1132         pub fn process_pending_htlc_forwards(&self) {
1133                 let mut new_events = Vec::new();
1134                 let mut failed_forwards = Vec::new();
1135                 {
1136                         let mut channel_state_lock = self.channel_state.lock().unwrap();
1137                         let channel_state = channel_state_lock.borrow_parts();
1138
1139                         if cfg!(not(feature = "fuzztarget")) && Instant::now() < *channel_state.next_forward {
1140                                 return;
1141                         }
1142
1143                         for (short_chan_id, mut pending_forwards) in channel_state.forward_htlcs.drain() {
1144                                 if short_chan_id != 0 {
1145                                         let forward_chan_id = match channel_state.short_to_id.get(&short_chan_id) {
1146                                                 Some(chan_id) => chan_id.clone(),
1147                                                 None => {
1148                                                         failed_forwards.reserve(pending_forwards.len());
1149                                                         for HTLCForwardInfo { prev_short_channel_id, prev_htlc_id, forward_info } in pending_forwards.drain(..) {
1150                                                                 let htlc_source = HTLCSource::PreviousHopData(HTLCPreviousHopData {
1151                                                                         short_channel_id: prev_short_channel_id,
1152                                                                         htlc_id: prev_htlc_id,
1153                                                                         incoming_packet_shared_secret: forward_info.incoming_shared_secret,
1154                                                                 });
1155                                                                 failed_forwards.push((htlc_source, forward_info.payment_hash, 0x4000 | 10, None));
1156                                                         }
1157                                                         continue;
1158                                                 }
1159                                         };
1160                                         let forward_chan = &mut channel_state.by_id.get_mut(&forward_chan_id).unwrap();
1161
1162                                         let mut add_htlc_msgs = Vec::new();
1163                                         for HTLCForwardInfo { prev_short_channel_id, prev_htlc_id, forward_info } in pending_forwards.drain(..) {
1164                                                 let htlc_source = HTLCSource::PreviousHopData(HTLCPreviousHopData {
1165                                                         short_channel_id: prev_short_channel_id,
1166                                                         htlc_id: prev_htlc_id,
1167                                                         incoming_packet_shared_secret: forward_info.incoming_shared_secret,
1168                                                 });
1169                                                 match forward_chan.send_htlc(forward_info.amt_to_forward, forward_info.payment_hash, forward_info.outgoing_cltv_value, htlc_source.clone(), forward_info.onion_packet.unwrap()) {
1170                                                         Err(_e) => {
1171                                                                 let chan_update = self.get_channel_update(forward_chan).unwrap();
1172                                                                 failed_forwards.push((htlc_source, forward_info.payment_hash, 0x1000 | 7, Some(chan_update)));
1173                                                                 continue;
1174                                                         },
1175                                                         Ok(update_add) => {
1176                                                                 match update_add {
1177                                                                         Some(msg) => { add_htlc_msgs.push(msg); },
1178                                                                         None => {
1179                                                                                 // Nothing to do here...we're waiting on a remote
1180                                                                                 // revoke_and_ack before we can add anymore HTLCs. The Channel
1181                                                                                 // will automatically handle building the update_add_htlc and
1182                                                                                 // commitment_signed messages when we can.
1183                                                                                 // TODO: Do some kind of timer to set the channel as !is_live()
1184                                                                                 // as we don't really want others relying on us relaying through
1185                                                                                 // this channel currently :/.
1186                                                                         }
1187                                                                 }
1188                                                         }
1189                                                 }
1190                                         }
1191
1192                                         if !add_htlc_msgs.is_empty() {
1193                                                 let (commitment_msg, monitor) = match forward_chan.send_commitment() {
1194                                                         Ok(res) => res,
1195                                                         Err(e) => {
1196                                                                 if let &Some(msgs::ErrorAction::DisconnectPeer{msg: Some(ref _err_msg)}) = &e.action {
1197                                                                 } else if let &Some(msgs::ErrorAction::SendErrorMessage{msg: ref _err_msg}) = &e.action {
1198                                                                 } else {
1199                                                                         panic!("Stated return value requirements in send_commitment() were not met");
1200                                                                 }
1201                                                                 //TODO: Handle...this is bad!
1202                                                                 continue;
1203                                                         },
1204                                                 };
1205                                                 new_events.push((Some(monitor), events::Event::UpdateHTLCs {
1206                                                         node_id: forward_chan.get_their_node_id(),
1207                                                         updates: msgs::CommitmentUpdate {
1208                                                                 update_add_htlcs: add_htlc_msgs,
1209                                                                 update_fulfill_htlcs: Vec::new(),
1210                                                                 update_fail_htlcs: Vec::new(),
1211                                                                 update_fail_malformed_htlcs: Vec::new(),
1212                                                                 commitment_signed: commitment_msg,
1213                                                         },
1214                                                 }));
1215                                         }
1216                                 } else {
1217                                         for HTLCForwardInfo { prev_short_channel_id, prev_htlc_id, forward_info } in pending_forwards.drain(..) {
1218                                                 let prev_hop_data = HTLCPreviousHopData {
1219                                                         short_channel_id: prev_short_channel_id,
1220                                                         htlc_id: prev_htlc_id,
1221                                                         incoming_packet_shared_secret: forward_info.incoming_shared_secret,
1222                                                 };
1223                                                 match channel_state.claimable_htlcs.entry(forward_info.payment_hash) {
1224                                                         hash_map::Entry::Occupied(mut entry) => entry.get_mut().push(prev_hop_data),
1225                                                         hash_map::Entry::Vacant(entry) => { entry.insert(vec![prev_hop_data]); },
1226                                                 };
1227                                                 new_events.push((None, events::Event::PaymentReceived {
1228                                                         payment_hash: forward_info.payment_hash,
1229                                                         amt: forward_info.amt_to_forward,
1230                                                 }));
1231                                         }
1232                                 }
1233                         }
1234                 }
1235
1236                 for (htlc_source, payment_hash, failure_code, update) in failed_forwards.drain(..) {
1237                         match update {
1238                                 None => self.fail_htlc_backwards_internal(self.channel_state.lock().unwrap(), htlc_source, &payment_hash, HTLCFailReason::Reason { failure_code, data: Vec::new() }),
1239                                 Some(chan_update) => self.fail_htlc_backwards_internal(self.channel_state.lock().unwrap(), htlc_source, &payment_hash, HTLCFailReason::Reason { failure_code, data: chan_update.encode_with_len() }),
1240                         };
1241                 }
1242
1243                 if new_events.is_empty() { return }
1244
1245                 new_events.retain(|event| {
1246                         if let &Some(ref monitor) = &event.0 {
1247                                 if let Err(_e) = self.monitor.add_update_monitor(monitor.get_funding_txo().unwrap(), monitor.clone()) {
1248                                         unimplemented!();// but def dont push the event...
1249                                 }
1250                         }
1251                         true
1252                 });
1253
1254                 let mut events = self.pending_events.lock().unwrap();
1255                 events.reserve(new_events.len());
1256                 for event in new_events.drain(..) {
1257                         events.push(event.1);
1258                 }
1259         }
1260
1261         /// Indicates that the preimage for payment_hash is unknown after a PaymentReceived event.
1262         pub fn fail_htlc_backwards(&self, payment_hash: &[u8; 32]) -> bool {
1263                 let mut channel_state = Some(self.channel_state.lock().unwrap());
1264                 let removed_source = channel_state.as_mut().unwrap().claimable_htlcs.remove(payment_hash);
1265                 if let Some(mut sources) = removed_source {
1266                         for htlc_with_hash in sources.drain(..) {
1267                                 if channel_state.is_none() { channel_state = Some(self.channel_state.lock().unwrap()); }
1268                                 self.fail_htlc_backwards_internal(channel_state.take().unwrap(), HTLCSource::PreviousHopData(htlc_with_hash), payment_hash, HTLCFailReason::Reason { failure_code: 0x4000 | 15, data: Vec::new() });
1269                         }
1270                         true
1271                 } else { false }
1272         }
1273
1274         /// Fails an HTLC backwards to the sender of it to us.
1275         /// Note that while we take a channel_state lock as input, we do *not* assume consistency here.
1276         /// There are several callsites that do stupid things like loop over a list of payment_hashes
1277         /// to fail and take the channel_state lock for each iteration (as we take ownership and may
1278         /// drop it). In other words, no assumptions are made that entries in claimable_htlcs point to
1279         /// still-available channels.
1280         fn fail_htlc_backwards_internal(&self, mut channel_state: MutexGuard<ChannelHolder>, source: HTLCSource, payment_hash: &[u8; 32], onion_error: HTLCFailReason) {
1281                 match source {
1282                         HTLCSource::OutboundRoute { .. } => {
1283                                 mem::drop(channel_state);
1284
1285                                 let mut pending_events = self.pending_events.lock().unwrap();
1286                                 pending_events.push(events::Event::PaymentFailed {
1287                                         payment_hash: payment_hash.clone()
1288                                 });
1289                         },
1290                         HTLCSource::PreviousHopData(HTLCPreviousHopData { short_channel_id, htlc_id, incoming_packet_shared_secret }) => {
1291                                 let err_packet = match onion_error {
1292                                         HTLCFailReason::Reason { failure_code, data } => {
1293                                                 let packet = ChannelManager::build_failure_packet(&incoming_packet_shared_secret, failure_code, &data[..]).encode();
1294                                                 ChannelManager::encrypt_failure_packet(&incoming_packet_shared_secret, &packet)
1295                                         },
1296                                         HTLCFailReason::ErrorPacket { err } => {
1297                                                 ChannelManager::encrypt_failure_packet(&incoming_packet_shared_secret, &err.data)
1298                                         }
1299                                 };
1300
1301                                 let (node_id, fail_msgs) = {
1302                                         let chan_id = match channel_state.short_to_id.get(&short_channel_id) {
1303                                                 Some(chan_id) => chan_id.clone(),
1304                                                 None => return
1305                                         };
1306
1307                                         let chan = channel_state.by_id.get_mut(&chan_id).unwrap();
1308                                         match chan.get_update_fail_htlc_and_commit(htlc_id, err_packet) {
1309                                                 Ok(msg) => (chan.get_their_node_id(), msg),
1310                                                 Err(_e) => {
1311                                                         //TODO: Do something with e?
1312                                                         return;
1313                                                 },
1314                                         }
1315                                 };
1316
1317                                 match fail_msgs {
1318                                         Some((msg, commitment_msg, chan_monitor)) => {
1319                                                 mem::drop(channel_state);
1320
1321                                                 if let Err(_e) = self.monitor.add_update_monitor(chan_monitor.get_funding_txo().unwrap(), chan_monitor) {
1322                                                         unimplemented!();// but def dont push the event...
1323                                                 }
1324
1325                                                 let mut pending_events = self.pending_events.lock().unwrap();
1326                                                 pending_events.push(events::Event::UpdateHTLCs {
1327                                                         node_id,
1328                                                         updates: msgs::CommitmentUpdate {
1329                                                                 update_add_htlcs: Vec::new(),
1330                                                                 update_fulfill_htlcs: Vec::new(),
1331                                                                 update_fail_htlcs: vec![msg],
1332                                                                 update_fail_malformed_htlcs: Vec::new(),
1333                                                                 commitment_signed: commitment_msg,
1334                                                         },
1335                                                 });
1336                                         },
1337                                         None => {},
1338                                 }
1339                         },
1340                 }
1341         }
1342
1343         /// Provides a payment preimage in response to a PaymentReceived event, returning true and
1344         /// generating message events for the net layer to claim the payment, if possible. Thus, you
1345         /// should probably kick the net layer to go send messages if this returns true!
1346         ///
1347         /// May panic if called except in response to a PaymentReceived event.
1348         pub fn claim_funds(&self, payment_preimage: [u8; 32]) -> bool {
1349                 let mut sha = Sha256::new();
1350                 sha.input(&payment_preimage);
1351                 let mut payment_hash = [0; 32];
1352                 sha.result(&mut payment_hash);
1353
1354                 let mut channel_state = Some(self.channel_state.lock().unwrap());
1355                 let removed_source = channel_state.as_mut().unwrap().claimable_htlcs.remove(&payment_hash);
1356                 if let Some(mut sources) = removed_source {
1357                         for htlc_with_hash in sources.drain(..) {
1358                                 if channel_state.is_none() { channel_state = Some(self.channel_state.lock().unwrap()); }
1359                                 self.claim_funds_internal(channel_state.take().unwrap(), HTLCSource::PreviousHopData(htlc_with_hash), payment_preimage);
1360                         }
1361                         true
1362                 } else { false }
1363         }
1364         fn claim_funds_internal(&self, mut channel_state: MutexGuard<ChannelHolder>, source: HTLCSource, payment_preimage: [u8; 32]) {
1365                 match source {
1366                         HTLCSource::OutboundRoute { .. } => {
1367                                 mem::drop(channel_state);
1368                                 let mut pending_events = self.pending_events.lock().unwrap();
1369                                 pending_events.push(events::Event::PaymentSent {
1370                                         payment_preimage
1371                                 });
1372                         },
1373                         HTLCSource::PreviousHopData(HTLCPreviousHopData { short_channel_id, htlc_id, .. }) => {
1374                                 //TODO: Delay the claimed_funds relaying just like we do outbound relay!
1375                                 let (node_id, fulfill_msgs) = {
1376                                         let chan_id = match channel_state.short_to_id.get(&short_channel_id) {
1377                                                 Some(chan_id) => chan_id.clone(),
1378                                                 None => {
1379                                                         // TODO: There is probably a channel manager somewhere that needs to
1380                                                         // learn the preimage as the channel already hit the chain and that's
1381                                                         // why its missing.
1382                                                         return
1383                                                 }
1384                                         };
1385
1386                                         let chan = channel_state.by_id.get_mut(&chan_id).unwrap();
1387                                         match chan.get_update_fulfill_htlc_and_commit(htlc_id, payment_preimage) {
1388                                                 Ok(msg) => (chan.get_their_node_id(), msg),
1389                                                 Err(_e) => {
1390                                                         // TODO: There is probably a channel manager somewhere that needs to
1391                                                         // learn the preimage as the channel may be about to hit the chain.
1392                                                         //TODO: Do something with e?
1393                                                         return
1394                                                 },
1395                                         }
1396                                 };
1397
1398                                 mem::drop(channel_state);
1399                                 if let Some(chan_monitor) = fulfill_msgs.1 {
1400                                         if let Err(_e) = self.monitor.add_update_monitor(chan_monitor.get_funding_txo().unwrap(), chan_monitor) {
1401                                                 unimplemented!();// but def dont push the event...
1402                                         }
1403                                 }
1404
1405                                 if let Some((msg, commitment_msg)) = fulfill_msgs.0 {
1406                                         let mut pending_events = self.pending_events.lock().unwrap();
1407                                         pending_events.push(events::Event::UpdateHTLCs {
1408                                                 node_id: node_id,
1409                                                 updates: msgs::CommitmentUpdate {
1410                                                         update_add_htlcs: Vec::new(),
1411                                                         update_fulfill_htlcs: vec![msg],
1412                                                         update_fail_htlcs: Vec::new(),
1413                                                         update_fail_malformed_htlcs: Vec::new(),
1414                                                         commitment_signed: commitment_msg,
1415                                                 }
1416                                         });
1417                                 }
1418                         },
1419                 }
1420         }
1421
1422         /// Gets the node_id held by this ChannelManager
1423         pub fn get_our_node_id(&self) -> PublicKey {
1424                 PublicKey::from_secret_key(&self.secp_ctx, &self.our_network_key)
1425         }
1426
1427         /// Used to restore channels to normal operation after a
1428         /// ChannelMonitorUpdateErr::TemporaryFailure was returned from a channel monitor update
1429         /// operation.
1430         pub fn test_restore_channel_monitor(&self) {
1431                 unimplemented!();
1432         }
1433
1434         fn internal_open_channel(&self, their_node_id: &PublicKey, msg: &msgs::OpenChannel) -> Result<msgs::AcceptChannel, MsgHandleErrInternal> {
1435                 if msg.chain_hash != self.genesis_hash {
1436                         return Err(MsgHandleErrInternal::send_err_msg_no_close("Unknown genesis block hash", msg.temporary_channel_id.clone()));
1437                 }
1438                 let mut channel_state = self.channel_state.lock().unwrap();
1439                 if channel_state.by_id.contains_key(&msg.temporary_channel_id) {
1440                         return Err(MsgHandleErrInternal::send_err_msg_no_close("temporary_channel_id collision!", msg.temporary_channel_id.clone()));
1441                 }
1442
1443                 let chan_keys = if cfg!(feature = "fuzztarget") {
1444                         ChannelKeys {
1445                                 funding_key:               SecretKey::from_slice(&self.secp_ctx, &[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0]).unwrap(),
1446                                 revocation_base_key:       SecretKey::from_slice(&self.secp_ctx, &[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0]).unwrap(),
1447                                 payment_base_key:          SecretKey::from_slice(&self.secp_ctx, &[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0]).unwrap(),
1448                                 delayed_payment_base_key:  SecretKey::from_slice(&self.secp_ctx, &[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 0]).unwrap(),
1449                                 htlc_base_key:             SecretKey::from_slice(&self.secp_ctx, &[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 5, 0]).unwrap(),
1450                                 channel_close_key:         SecretKey::from_slice(&self.secp_ctx, &[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 6, 0]).unwrap(),
1451                                 channel_monitor_claim_key: SecretKey::from_slice(&self.secp_ctx, &[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 7, 0]).unwrap(),
1452                                 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],
1453                         }
1454                 } else {
1455                         let mut key_seed = [0u8; 32];
1456                         rng::fill_bytes(&mut key_seed);
1457                         match ChannelKeys::new_from_seed(&key_seed) {
1458                                 Ok(key) => key,
1459                                 Err(_) => panic!("RNG is busted!")
1460                         }
1461                 };
1462
1463                 let channel = Channel::new_from_req(&*self.fee_estimator, chan_keys, their_node_id.clone(), msg, 0, false, self.announce_channels_publicly, Arc::clone(&self.logger), &self.configuration).map_err(|e| MsgHandleErrInternal::from_no_close(e))?;
1464                 let accept_msg = channel.get_accept_channel();
1465                 channel_state.by_id.insert(channel.channel_id(), channel);
1466                 Ok(accept_msg)
1467         }
1468
1469         fn internal_accept_channel(&self, their_node_id: &PublicKey, msg: &msgs::AcceptChannel) -> Result<(), MsgHandleErrInternal> {
1470                 let (value, output_script, user_id) = {
1471                         let mut channel_state = self.channel_state.lock().unwrap();
1472                         match channel_state.by_id.get_mut(&msg.temporary_channel_id) {
1473                                 Some(chan) => {
1474                                         if chan.get_their_node_id() != *their_node_id {
1475                                                 //TODO: see issue #153, need a consistent behavior on obnoxious behavior from random node
1476                                                 return Err(MsgHandleErrInternal::send_err_msg_no_close("Got a message for a channel from the wrong node!", msg.temporary_channel_id));
1477                                         }
1478                                         chan.accept_channel(&msg).map_err(|e| MsgHandleErrInternal::from_maybe_close(e))?;
1479                                         (chan.get_value_satoshis(), chan.get_funding_redeemscript().to_v0_p2wsh(), chan.get_user_id())
1480                                 },
1481                                 //TODO: same as above
1482                                 None => return Err(MsgHandleErrInternal::send_err_msg_no_close("Failed to find corresponding channel", msg.temporary_channel_id))
1483                         }
1484                 };
1485                 let mut pending_events = self.pending_events.lock().unwrap();
1486                 pending_events.push(events::Event::FundingGenerationReady {
1487                         temporary_channel_id: msg.temporary_channel_id,
1488                         channel_value_satoshis: value,
1489                         output_script: output_script,                   user_channel_id: user_id,
1490                 });
1491                 Ok(())
1492         }
1493
1494         fn internal_funding_created(&self, their_node_id: &PublicKey, msg: &msgs::FundingCreated) -> Result<msgs::FundingSigned, MsgHandleErrInternal> {
1495                 let (chan, funding_msg, monitor_update) = {
1496                         let mut channel_state = self.channel_state.lock().unwrap();
1497                         match channel_state.by_id.entry(msg.temporary_channel_id.clone()) {
1498                                 hash_map::Entry::Occupied(mut chan) => {
1499                                         if chan.get().get_their_node_id() != *their_node_id {
1500                                                 //TODO: here and below MsgHandleErrInternal, #153 case
1501                                                 return Err(MsgHandleErrInternal::send_err_msg_no_close("Got a message for a channel from the wrong node!", msg.temporary_channel_id));
1502                                         }
1503                                         match chan.get_mut().funding_created(msg) {
1504                                                 Ok((funding_msg, monitor_update)) => {
1505                                                         (chan.remove(), funding_msg, monitor_update)
1506                                                 },
1507                                                 Err(e) => {
1508                                                         return Err(e).map_err(|e| MsgHandleErrInternal::from_maybe_close(e))
1509                                                 }
1510                                         }
1511                                 },
1512                                 hash_map::Entry::Vacant(_) => return Err(MsgHandleErrInternal::send_err_msg_no_close("Failed to find corresponding channel", msg.temporary_channel_id))
1513                         }
1514                 }; // Release channel lock for install_watch_outpoint call,
1515                    // note that this means if the remote end is misbehaving and sends a message for the same
1516                    // channel back-to-back with funding_created, we'll end up thinking they sent a message
1517                    // for a bogus channel.
1518                 if let Err(_e) = self.monitor.add_update_monitor(monitor_update.get_funding_txo().unwrap(), monitor_update) {
1519                         unimplemented!();
1520                 }
1521                 let mut channel_state = self.channel_state.lock().unwrap();
1522                 match channel_state.by_id.entry(funding_msg.channel_id) {
1523                         hash_map::Entry::Occupied(_) => {
1524                                 return Err(MsgHandleErrInternal::send_err_msg_no_close("Already had channel with the new channel_id", funding_msg.channel_id))
1525                         },
1526                         hash_map::Entry::Vacant(e) => {
1527                                 e.insert(chan);
1528                         }
1529                 }
1530                 Ok(funding_msg)
1531         }
1532
1533         fn internal_funding_signed(&self, their_node_id: &PublicKey, msg: &msgs::FundingSigned) -> Result<(), MsgHandleErrInternal> {
1534                 let (funding_txo, user_id, monitor) = {
1535                         let mut channel_state = self.channel_state.lock().unwrap();
1536                         match channel_state.by_id.get_mut(&msg.channel_id) {
1537                                 Some(chan) => {
1538                                         if chan.get_their_node_id() != *their_node_id {
1539                                                 //TODO: here and below MsgHandleErrInternal, #153 case
1540                                                 return Err(MsgHandleErrInternal::send_err_msg_no_close("Got a message for a channel from the wrong node!", msg.channel_id));
1541                                         }
1542                                         let chan_monitor = chan.funding_signed(&msg).map_err(|e| MsgHandleErrInternal::from_maybe_close(e))?;
1543                                         (chan.get_funding_txo().unwrap(), chan.get_user_id(), chan_monitor)
1544                                 },
1545                                 None => return Err(MsgHandleErrInternal::send_err_msg_no_close("Failed to find corresponding channel", msg.channel_id))
1546                         }
1547                 };
1548                 if let Err(_e) = self.monitor.add_update_monitor(monitor.get_funding_txo().unwrap(), monitor) {
1549                         unimplemented!();
1550                 }
1551                 let mut pending_events = self.pending_events.lock().unwrap();
1552                 pending_events.push(events::Event::FundingBroadcastSafe {
1553                         funding_txo: funding_txo,
1554                         user_channel_id: user_id,
1555                 });
1556                 Ok(())
1557         }
1558
1559         fn internal_funding_locked(&self, their_node_id: &PublicKey, msg: &msgs::FundingLocked) -> Result<Option<msgs::AnnouncementSignatures>, MsgHandleErrInternal> {
1560                 let mut channel_state = self.channel_state.lock().unwrap();
1561                 match channel_state.by_id.get_mut(&msg.channel_id) {
1562                         Some(chan) => {
1563                                 if chan.get_their_node_id() != *their_node_id {
1564                                         //TODO: here and below MsgHandleErrInternal, #153 case
1565                                         return Err(MsgHandleErrInternal::send_err_msg_no_close("Got a message for a channel from the wrong node!", msg.channel_id));
1566                                 }
1567                                 chan.funding_locked(&msg).map_err(|e| MsgHandleErrInternal::from_maybe_close(e))?;
1568                                 return Ok(self.get_announcement_sigs(chan));
1569                         },
1570                         None => return Err(MsgHandleErrInternal::send_err_msg_no_close("Failed to find corresponding channel", msg.channel_id))
1571                 };
1572         }
1573
1574         fn internal_shutdown(&self, their_node_id: &PublicKey, msg: &msgs::Shutdown) -> Result<(Option<msgs::Shutdown>, Option<msgs::ClosingSigned>), MsgHandleErrInternal> {
1575                 let (mut res, chan_option) = {
1576                         let mut channel_state_lock = self.channel_state.lock().unwrap();
1577                         let channel_state = channel_state_lock.borrow_parts();
1578
1579                         match channel_state.by_id.entry(msg.channel_id.clone()) {
1580                                 hash_map::Entry::Occupied(mut chan_entry) => {
1581                                         if chan_entry.get().get_their_node_id() != *their_node_id {
1582                                                 //TODO: here and below MsgHandleErrInternal, #153 case
1583                                                 return Err(MsgHandleErrInternal::send_err_msg_no_close("Got a message for a channel from the wrong node!", msg.channel_id));
1584                                         }
1585                                         let res = chan_entry.get_mut().shutdown(&*self.fee_estimator, &msg).map_err(|e| MsgHandleErrInternal::from_maybe_close(e))?;
1586                                         if chan_entry.get().is_shutdown() {
1587                                                 if let Some(short_id) = chan_entry.get().get_short_channel_id() {
1588                                                         channel_state.short_to_id.remove(&short_id);
1589                                                 }
1590                                                 (res, Some(chan_entry.remove_entry().1))
1591                                         } else { (res, None) }
1592                                 },
1593                                 hash_map::Entry::Vacant(_) => return Err(MsgHandleErrInternal::send_err_msg_no_close("Failed to find corresponding channel", msg.channel_id))
1594                         }
1595                 };
1596                 for htlc_source in res.2.drain(..) {
1597                         // unknown_next_peer...I dunno who that is anymore....
1598                         self.fail_htlc_backwards_internal(self.channel_state.lock().unwrap(), htlc_source.0, &htlc_source.1, HTLCFailReason::Reason { failure_code: 0x4000 | 10, data: Vec::new() });
1599                 }
1600                 if let Some(chan) = chan_option {
1601                         if let Ok(update) = self.get_channel_update(&chan) {
1602                                 let mut events = self.pending_events.lock().unwrap();
1603                                 events.push(events::Event::BroadcastChannelUpdate {
1604                                         msg: update
1605                                 });
1606                         }
1607                 }
1608                 Ok((res.0, res.1))
1609         }
1610
1611         fn internal_closing_signed(&self, their_node_id: &PublicKey, msg: &msgs::ClosingSigned) -> Result<Option<msgs::ClosingSigned>, MsgHandleErrInternal> {
1612                 let (res, chan_option) = {
1613                         let mut channel_state_lock = self.channel_state.lock().unwrap();
1614                         let channel_state = channel_state_lock.borrow_parts();
1615                         match channel_state.by_id.entry(msg.channel_id.clone()) {
1616                                 hash_map::Entry::Occupied(mut chan_entry) => {
1617                                         if chan_entry.get().get_their_node_id() != *their_node_id {
1618                                                 //TODO: here and below MsgHandleErrInternal, #153 case
1619                                                 return Err(MsgHandleErrInternal::send_err_msg_no_close("Got a message for a channel from the wrong node!", msg.channel_id));
1620                                         }
1621                                         let res = chan_entry.get_mut().closing_signed(&*self.fee_estimator, &msg).map_err(|e| MsgHandleErrInternal::from_maybe_close(e))?;
1622                                         if res.1.is_some() {
1623                                                 // We're done with this channel, we've got a signed closing transaction and
1624                                                 // will send the closing_signed back to the remote peer upon return. This
1625                                                 // also implies there are no pending HTLCs left on the channel, so we can
1626                                                 // fully delete it from tracking (the channel monitor is still around to
1627                                                 // watch for old state broadcasts)!
1628                                                 if let Some(short_id) = chan_entry.get().get_short_channel_id() {
1629                                                         channel_state.short_to_id.remove(&short_id);
1630                                                 }
1631                                                 (res, Some(chan_entry.remove_entry().1))
1632                                         } else { (res, None) }
1633                                 },
1634                                 hash_map::Entry::Vacant(_) => return Err(MsgHandleErrInternal::send_err_msg_no_close("Failed to find corresponding channel", msg.channel_id))
1635                         }
1636                 };
1637                 if let Some(broadcast_tx) = res.1 {
1638                         self.tx_broadcaster.broadcast_transaction(&broadcast_tx);
1639                 }
1640                 if let Some(chan) = chan_option {
1641                         if let Ok(update) = self.get_channel_update(&chan) {
1642                                 let mut events = self.pending_events.lock().unwrap();
1643                                 events.push(events::Event::BroadcastChannelUpdate {
1644                                         msg: update
1645                                 });
1646                         }
1647                 }
1648                 Ok(res.0)
1649         }
1650
1651         fn internal_update_add_htlc(&self, their_node_id: &PublicKey, msg: &msgs::UpdateAddHTLC) -> Result<(), MsgHandleErrInternal> {
1652                 //TODO: BOLT 4 points out a specific attack where a peer may re-send an onion packet and
1653                 //determine the state of the payment based on our response/if we forward anything/the time
1654                 //we take to respond. We should take care to avoid allowing such an attack.
1655                 //
1656                 //TODO: There exists a further attack where a node may garble the onion data, forward it to
1657                 //us repeatedly garbled in different ways, and compare our error messages, which are
1658                 //encrypted with the same key. Its not immediately obvious how to usefully exploit that,
1659                 //but we should prevent it anyway.
1660
1661                 let (pending_forward_info, mut channel_state_lock) = self.decode_update_add_htlc_onion(msg);
1662                 let channel_state = channel_state_lock.borrow_parts();
1663
1664                 match channel_state.by_id.get_mut(&msg.channel_id) {
1665                         Some(chan) => {
1666                                 if chan.get_their_node_id() != *their_node_id {
1667                                         //TODO: here MsgHandleErrInternal, #153 case
1668                                         return Err(MsgHandleErrInternal::send_err_msg_no_close("Got a message for a channel from the wrong node!", msg.channel_id));
1669                                 }
1670                                 if !chan.is_usable() {
1671                                         return Err(MsgHandleErrInternal::from_no_close(HandleError{err: "Channel not yet available for receiving HTLCs", action: Some(msgs::ErrorAction::IgnoreError)}));
1672                                 }
1673                                 chan.update_add_htlc(&msg, pending_forward_info).map_err(|e| MsgHandleErrInternal::from_maybe_close(e))
1674                         },
1675                         None => return Err(MsgHandleErrInternal::send_err_msg_no_close("Failed to find corresponding channel", msg.channel_id))
1676                 }
1677         }
1678
1679         fn internal_update_fulfill_htlc(&self, their_node_id: &PublicKey, msg: &msgs::UpdateFulfillHTLC) -> Result<(), MsgHandleErrInternal> {
1680                 let mut channel_state = self.channel_state.lock().unwrap();
1681                 let htlc_source = match channel_state.by_id.get_mut(&msg.channel_id) {
1682                         Some(chan) => {
1683                                 if chan.get_their_node_id() != *their_node_id {
1684                                         //TODO: here and below MsgHandleErrInternal, #153 case
1685                                         return Err(MsgHandleErrInternal::send_err_msg_no_close("Got a message for a channel from the wrong node!", msg.channel_id));
1686                                 }
1687                                 chan.update_fulfill_htlc(&msg).map_err(|e| MsgHandleErrInternal::from_maybe_close(e))?.clone()
1688                         },
1689                         None => return Err(MsgHandleErrInternal::send_err_msg_no_close("Failed to find corresponding channel", msg.channel_id))
1690                 };
1691                 self.claim_funds_internal(channel_state, htlc_source, msg.payment_preimage.clone());
1692                 Ok(())
1693         }
1694
1695         fn internal_update_fail_htlc(&self, their_node_id: &PublicKey, msg: &msgs::UpdateFailHTLC) -> Result<Option<msgs::HTLCFailChannelUpdate>, MsgHandleErrInternal> {
1696                 let mut channel_state = self.channel_state.lock().unwrap();
1697                 let htlc_source = match channel_state.by_id.get_mut(&msg.channel_id) {
1698                         Some(chan) => {
1699                                 if chan.get_their_node_id() != *their_node_id {
1700                                         //TODO: here and below MsgHandleErrInternal, #153 case
1701                                         return Err(MsgHandleErrInternal::send_err_msg_no_close("Got a message for a channel from the wrong node!", msg.channel_id));
1702                                 }
1703                                 chan.update_fail_htlc(&msg, HTLCFailReason::ErrorPacket { err: msg.reason.clone() }).map_err(|e| MsgHandleErrInternal::from_maybe_close(e))
1704                         },
1705                         None => return Err(MsgHandleErrInternal::send_err_msg_no_close("Failed to find corresponding channel", msg.channel_id))
1706                 }?;
1707
1708                 match htlc_source {
1709                         &HTLCSource::OutboundRoute { ref route, ref session_priv, .. } => {
1710                                 // Handle packed channel/node updates for passing back for the route handler
1711                                 let mut packet_decrypted = msg.reason.data.clone();
1712                                 let mut res = None;
1713                                 Self::construct_onion_keys_callback(&self.secp_ctx, &route, &session_priv, |shared_secret, _, _, route_hop| {
1714                                         if res.is_some() { return; }
1715
1716                                         let ammag = ChannelManager::gen_ammag_from_shared_secret(&shared_secret);
1717
1718                                         let mut decryption_tmp = Vec::with_capacity(packet_decrypted.len());
1719                                         decryption_tmp.resize(packet_decrypted.len(), 0);
1720                                         let mut chacha = ChaCha20::new(&ammag, &[0u8; 8]);
1721                                         chacha.process(&packet_decrypted, &mut decryption_tmp[..]);
1722                                         packet_decrypted = decryption_tmp;
1723
1724                                         if let Ok(err_packet) = msgs::DecodedOnionErrorPacket::read(&mut Cursor::new(&packet_decrypted)) {
1725                                                 if err_packet.failuremsg.len() >= 2 {
1726                                                         let um = ChannelManager::gen_um_from_shared_secret(&shared_secret);
1727
1728                                                         let mut hmac = Hmac::new(Sha256::new(), &um);
1729                                                         hmac.input(&err_packet.encode()[32..]);
1730                                                         let mut calc_tag = [0u8; 32];
1731                                                         hmac.raw_result(&mut calc_tag);
1732                                                         if crypto::util::fixed_time_eq(&calc_tag, &err_packet.hmac) {
1733                                                                 const UNKNOWN_CHAN: u16 = 0x4000|10;
1734                                                                 const TEMP_CHAN_FAILURE: u16 = 0x4000|7;
1735                                                                 match byte_utils::slice_to_be16(&err_packet.failuremsg[0..2]) {
1736                                                                         TEMP_CHAN_FAILURE => {
1737                                                                                 if err_packet.failuremsg.len() >= 4 {
1738                                                                                         let update_len = byte_utils::slice_to_be16(&err_packet.failuremsg[2..4]) as usize;
1739                                                                                         if err_packet.failuremsg.len() >= 4 + update_len {
1740                                                                                                 if let Ok(chan_update) = msgs::ChannelUpdate::read(&mut Cursor::new(&err_packet.failuremsg[4..4 + update_len])) {
1741                                                                                                         res = Some(msgs::HTLCFailChannelUpdate::ChannelUpdateMessage {
1742                                                                                                                 msg: chan_update,
1743                                                                                                         });
1744                                                                                                 }
1745                                                                                         }
1746                                                                                 }
1747                                                                         },
1748                                                                         UNKNOWN_CHAN => {
1749                                                                                 // No such next-hop. We know this came from the
1750                                                                                 // current node as the HMAC validated.
1751                                                                                 res = Some(msgs::HTLCFailChannelUpdate::ChannelClosed {
1752                                                                                         short_channel_id: route_hop.short_channel_id
1753                                                                                 });
1754                                                                         },
1755                                                                         _ => {}, //TODO: Enumerate all of these!
1756                                                                 }
1757                                                         }
1758                                                 }
1759                                         }
1760                                 }).unwrap();
1761                                 Ok(res)
1762                         },
1763                         _ => { Ok(None) },
1764                 }
1765         }
1766
1767         fn internal_update_fail_malformed_htlc(&self, their_node_id: &PublicKey, msg: &msgs::UpdateFailMalformedHTLC) -> Result<(), MsgHandleErrInternal> {
1768                 let mut channel_state = self.channel_state.lock().unwrap();
1769                 match channel_state.by_id.get_mut(&msg.channel_id) {
1770                         Some(chan) => {
1771                                 if chan.get_their_node_id() != *their_node_id {
1772                                         //TODO: here and below MsgHandleErrInternal, #153 case
1773                                         return Err(MsgHandleErrInternal::send_err_msg_no_close("Got a message for a channel from the wrong node!", msg.channel_id));
1774                                 }
1775                                 chan.update_fail_malformed_htlc(&msg, HTLCFailReason::Reason { failure_code: msg.failure_code, data: Vec::new() }).map_err(|e| MsgHandleErrInternal::from_maybe_close(e))?;
1776                                 Ok(())
1777                         },
1778                         None => return Err(MsgHandleErrInternal::send_err_msg_no_close("Failed to find corresponding channel", msg.channel_id))
1779                 }
1780         }
1781
1782         fn internal_commitment_signed(&self, their_node_id: &PublicKey, msg: &msgs::CommitmentSigned) -> Result<(msgs::RevokeAndACK, Option<msgs::CommitmentSigned>), MsgHandleErrInternal> {
1783                 let (revoke_and_ack, commitment_signed, chan_monitor) = {
1784                         let mut channel_state = self.channel_state.lock().unwrap();
1785                         match channel_state.by_id.get_mut(&msg.channel_id) {
1786                                 Some(chan) => {
1787                                         if chan.get_their_node_id() != *their_node_id {
1788                                                 //TODO: here and below MsgHandleErrInternal, #153 case
1789                                                 return Err(MsgHandleErrInternal::send_err_msg_no_close("Got a message for a channel from the wrong node!", msg.channel_id));
1790                                         }
1791                                         chan.commitment_signed(&msg).map_err(|e| MsgHandleErrInternal::from_maybe_close(e))?
1792                                 },
1793                                 None => return Err(MsgHandleErrInternal::send_err_msg_no_close("Failed to find corresponding channel", msg.channel_id))
1794                         }
1795                 };
1796                 if let Err(_e) = self.monitor.add_update_monitor(chan_monitor.get_funding_txo().unwrap(), chan_monitor) {
1797                         unimplemented!();
1798                 }
1799
1800                 Ok((revoke_and_ack, commitment_signed))
1801         }
1802
1803         fn internal_revoke_and_ack(&self, their_node_id: &PublicKey, msg: &msgs::RevokeAndACK) -> Result<Option<msgs::CommitmentUpdate>, MsgHandleErrInternal> {
1804                 let ((res, mut pending_forwards, mut pending_failures, chan_monitor), short_channel_id) = {
1805                         let mut channel_state = self.channel_state.lock().unwrap();
1806                         match channel_state.by_id.get_mut(&msg.channel_id) {
1807                                 Some(chan) => {
1808                                         if chan.get_their_node_id() != *their_node_id {
1809                                                 //TODO: here and below MsgHandleErrInternal, #153 case
1810                                                 return Err(MsgHandleErrInternal::send_err_msg_no_close("Got a message for a channel from the wrong node!", msg.channel_id));
1811                                         }
1812                                         (chan.revoke_and_ack(&msg).map_err(|e| MsgHandleErrInternal::from_maybe_close(e))?, chan.get_short_channel_id().expect("RAA should only work on a short-id-available channel"))
1813                                 },
1814                                 None => return Err(MsgHandleErrInternal::send_err_msg_no_close("Failed to find corresponding channel", msg.channel_id))
1815                         }
1816                 };
1817                 if let Err(_e) = self.monitor.add_update_monitor(chan_monitor.get_funding_txo().unwrap(), chan_monitor) {
1818                         unimplemented!();
1819                 }
1820                 for failure in pending_failures.drain(..) {
1821                         self.fail_htlc_backwards_internal(self.channel_state.lock().unwrap(), failure.0, &failure.1, failure.2);
1822                 }
1823
1824                 let mut forward_event = None;
1825                 if !pending_forwards.is_empty() {
1826                         let mut channel_state = self.channel_state.lock().unwrap();
1827                         if channel_state.forward_htlcs.is_empty() {
1828                                 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));
1829                                 channel_state.next_forward = forward_event.unwrap();
1830                         }
1831                         for (forward_info, prev_htlc_id) in pending_forwards.drain(..) {
1832                                 match channel_state.forward_htlcs.entry(forward_info.short_channel_id) {
1833                                         hash_map::Entry::Occupied(mut entry) => {
1834                                                 entry.get_mut().push(HTLCForwardInfo { prev_short_channel_id: short_channel_id, prev_htlc_id, forward_info });
1835                                         },
1836                                         hash_map::Entry::Vacant(entry) => {
1837                                                 entry.insert(vec!(HTLCForwardInfo { prev_short_channel_id: short_channel_id, prev_htlc_id, forward_info }));
1838                                         }
1839                                 }
1840                         }
1841                 }
1842                 match forward_event {
1843                         Some(time) => {
1844                                 let mut pending_events = self.pending_events.lock().unwrap();
1845                                 pending_events.push(events::Event::PendingHTLCsForwardable {
1846                                         time_forwardable: time
1847                                 });
1848                         }
1849                         None => {},
1850                 }
1851
1852                 Ok(res)
1853         }
1854
1855         fn internal_update_fee(&self, their_node_id: &PublicKey, msg: &msgs::UpdateFee) -> Result<(), MsgHandleErrInternal> {
1856                 let mut channel_state = self.channel_state.lock().unwrap();
1857                 match channel_state.by_id.get_mut(&msg.channel_id) {
1858                         Some(chan) => {
1859                                 if chan.get_their_node_id() != *their_node_id {
1860                                         //TODO: here and below MsgHandleErrInternal, #153 case
1861                                         return Err(MsgHandleErrInternal::send_err_msg_no_close("Got a message for a channel from the wrong node!", msg.channel_id));
1862                                 }
1863                                 chan.update_fee(&*self.fee_estimator, &msg).map_err(|e| MsgHandleErrInternal::from_maybe_close(e))
1864                         },
1865                         None => return Err(MsgHandleErrInternal::send_err_msg_no_close("Failed to find corresponding channel", msg.channel_id))
1866                 }
1867         }
1868
1869         fn internal_announcement_signatures(&self, their_node_id: &PublicKey, msg: &msgs::AnnouncementSignatures) -> Result<(), MsgHandleErrInternal> {
1870                 let (chan_announcement, chan_update) = {
1871                         let mut channel_state = self.channel_state.lock().unwrap();
1872                         match channel_state.by_id.get_mut(&msg.channel_id) {
1873                                 Some(chan) => {
1874                                         if chan.get_their_node_id() != *their_node_id {
1875                                                 return Err(MsgHandleErrInternal::send_err_msg_no_close("Got a message for a channel from the wrong node!", msg.channel_id));
1876                                         }
1877                                         if !chan.is_usable() {
1878                                                 return Err(MsgHandleErrInternal::from_no_close(HandleError{err: "Got an announcement_signatures before we were ready for it", action: Some(msgs::ErrorAction::IgnoreError)}));
1879                                         }
1880
1881                                         let our_node_id = self.get_our_node_id();
1882                                         let (announcement, our_bitcoin_sig) = chan.get_channel_announcement(our_node_id.clone(), self.genesis_hash.clone())
1883                                                 .map_err(|e| MsgHandleErrInternal::from_maybe_close(e))?;
1884
1885                                         let were_node_one = announcement.node_id_1 == our_node_id;
1886                                         let msghash = Message::from_slice(&Sha256dHash::from_data(&announcement.encode()[..])[..]).unwrap();
1887                                         let bad_sig_action = MsgHandleErrInternal::send_err_msg_close_chan("Bad announcement_signatures node_signature", msg.channel_id);
1888                                         secp_call!(self.secp_ctx.verify(&msghash, &msg.node_signature, if were_node_one { &announcement.node_id_2 } else { &announcement.node_id_1 }), bad_sig_action);
1889                                         secp_call!(self.secp_ctx.verify(&msghash, &msg.bitcoin_signature, if were_node_one { &announcement.bitcoin_key_2 } else { &announcement.bitcoin_key_1 }), bad_sig_action);
1890
1891                                         let our_node_sig = self.secp_ctx.sign(&msghash, &self.our_network_key);
1892
1893                                         (msgs::ChannelAnnouncement {
1894                                                 node_signature_1: if were_node_one { our_node_sig } else { msg.node_signature },
1895                                                 node_signature_2: if were_node_one { msg.node_signature } else { our_node_sig },
1896                                                 bitcoin_signature_1: if were_node_one { our_bitcoin_sig } else { msg.bitcoin_signature },
1897                                                 bitcoin_signature_2: if were_node_one { msg.bitcoin_signature } else { our_bitcoin_sig },
1898                                                 contents: announcement,
1899                                         }, self.get_channel_update(chan).unwrap()) // can only fail if we're not in a ready state
1900                                 },
1901                                 None => return Err(MsgHandleErrInternal::send_err_msg_no_close("Failed to find corresponding channel", msg.channel_id))
1902                         }
1903                 };
1904                 let mut pending_events = self.pending_events.lock().unwrap();
1905                 pending_events.push(events::Event::BroadcastChannelAnnouncement { msg: chan_announcement, update_msg: chan_update });
1906                 Ok(())
1907         }
1908
1909         fn internal_channel_reestablish(&self, their_node_id: &PublicKey, msg: &msgs::ChannelReestablish) -> Result<(Option<msgs::FundingLocked>, Option<msgs::RevokeAndACK>, Option<msgs::CommitmentUpdate>), MsgHandleErrInternal> {
1910                 let (res, chan_monitor) = {
1911                         let mut channel_state = self.channel_state.lock().unwrap();
1912                         match channel_state.by_id.get_mut(&msg.channel_id) {
1913                                 Some(chan) => {
1914                                         if chan.get_their_node_id() != *their_node_id {
1915                                                 return Err(MsgHandleErrInternal::send_err_msg_no_close("Got a message for a channel from the wrong node!", msg.channel_id));
1916                                         }
1917                                         let (funding_locked, revoke_and_ack, commitment_update, channel_monitor) = chan.channel_reestablish(msg).map_err(|e| MsgHandleErrInternal::from_maybe_close(e))?;
1918                                         (Ok((funding_locked, revoke_and_ack, commitment_update)), channel_monitor)
1919                                 },
1920                                 None => return Err(MsgHandleErrInternal::send_err_msg_no_close("Failed to find corresponding channel", msg.channel_id))
1921                         }
1922                 };
1923                 if let Some(monitor) = chan_monitor {
1924                         if let Err(_e) = self.monitor.add_update_monitor(monitor.get_funding_txo().unwrap(), monitor) {
1925                                 unimplemented!();
1926                         }
1927                 }
1928                 res
1929         }
1930 }
1931
1932 impl events::EventsProvider for ChannelManager {
1933         fn get_and_clear_pending_events(&self) -> Vec<events::Event> {
1934                 let mut pending_events = self.pending_events.lock().unwrap();
1935                 let mut ret = Vec::new();
1936                 mem::swap(&mut ret, &mut *pending_events);
1937                 ret
1938         }
1939 }
1940
1941 impl ChainListener for ChannelManager {
1942         fn block_connected(&self, header: &BlockHeader, height: u32, txn_matched: &[&Transaction], indexes_of_txn_matched: &[u32]) {
1943                 let mut new_events = Vec::new();
1944                 let mut failed_channels = Vec::new();
1945                 {
1946                         let mut channel_lock = self.channel_state.lock().unwrap();
1947                         let channel_state = channel_lock.borrow_parts();
1948                         let short_to_id = channel_state.short_to_id;
1949                         channel_state.by_id.retain(|_, channel| {
1950                                 let chan_res = channel.block_connected(header, height, txn_matched, indexes_of_txn_matched);
1951                                 if let Ok(Some(funding_locked)) = chan_res {
1952                                         let announcement_sigs = self.get_announcement_sigs(channel);
1953                                         new_events.push(events::Event::SendFundingLocked {
1954                                                 node_id: channel.get_their_node_id(),
1955                                                 msg: funding_locked,
1956                                                 announcement_sigs: announcement_sigs
1957                                         });
1958                                         short_to_id.insert(channel.get_short_channel_id().unwrap(), channel.channel_id());
1959                                 } else if let Err(e) = chan_res {
1960                                         new_events.push(events::Event::HandleError {
1961                                                 node_id: channel.get_their_node_id(),
1962                                                 action: e.action,
1963                                         });
1964                                         if channel.is_shutdown() {
1965                                                 return false;
1966                                         }
1967                                 }
1968                                 if let Some(funding_txo) = channel.get_funding_txo() {
1969                                         for tx in txn_matched {
1970                                                 for inp in tx.input.iter() {
1971                                                         if inp.previous_output == funding_txo.into_bitcoin_outpoint() {
1972                                                                 if let Some(short_id) = channel.get_short_channel_id() {
1973                                                                         short_to_id.remove(&short_id);
1974                                                                 }
1975                                                                 // It looks like our counterparty went on-chain. We go ahead and
1976                                                                 // broadcast our latest local state as well here, just in case its
1977                                                                 // some kind of SPV attack, though we expect these to be dropped.
1978                                                                 failed_channels.push(channel.force_shutdown());
1979                                                                 if let Ok(update) = self.get_channel_update(&channel) {
1980                                                                         new_events.push(events::Event::BroadcastChannelUpdate {
1981                                                                                 msg: update
1982                                                                         });
1983                                                                 }
1984                                                                 return false;
1985                                                         }
1986                                                 }
1987                                         }
1988                                 }
1989                                 if channel.is_funding_initiated() && channel.channel_monitor().would_broadcast_at_height(height) {
1990                                         if let Some(short_id) = channel.get_short_channel_id() {
1991                                                 short_to_id.remove(&short_id);
1992                                         }
1993                                         failed_channels.push(channel.force_shutdown());
1994                                         // If would_broadcast_at_height() is true, the channel_monitor will broadcast
1995                                         // the latest local tx for us, so we should skip that here (it doesn't really
1996                                         // hurt anything, but does make tests a bit simpler).
1997                                         failed_channels.last_mut().unwrap().0 = Vec::new();
1998                                         if let Ok(update) = self.get_channel_update(&channel) {
1999                                                 new_events.push(events::Event::BroadcastChannelUpdate {
2000                                                         msg: update
2001                                                 });
2002                                         }
2003                                         return false;
2004                                 }
2005                                 true
2006                         });
2007                 }
2008                 for failure in failed_channels.drain(..) {
2009                         self.finish_force_close_channel(failure);
2010                 }
2011                 let mut pending_events = self.pending_events.lock().unwrap();
2012                 for funding_locked in new_events.drain(..) {
2013                         pending_events.push(funding_locked);
2014                 }
2015                 self.latest_block_height.store(height as usize, Ordering::Release);
2016         }
2017
2018         /// We force-close the channel without letting our counterparty participate in the shutdown
2019         fn block_disconnected(&self, header: &BlockHeader) {
2020                 let mut new_events = Vec::new();
2021                 let mut failed_channels = Vec::new();
2022                 {
2023                         let mut channel_lock = self.channel_state.lock().unwrap();
2024                         let channel_state = channel_lock.borrow_parts();
2025                         let short_to_id = channel_state.short_to_id;
2026                         channel_state.by_id.retain(|_,  v| {
2027                                 if v.block_disconnected(header) {
2028                                         if let Some(short_id) = v.get_short_channel_id() {
2029                                                 short_to_id.remove(&short_id);
2030                                         }
2031                                         failed_channels.push(v.force_shutdown());
2032                                         if let Ok(update) = self.get_channel_update(&v) {
2033                                                 new_events.push(events::Event::BroadcastChannelUpdate {
2034                                                         msg: update
2035                                                 });
2036                                         }
2037                                         false
2038                                 } else {
2039                                         true
2040                                 }
2041                         });
2042                 }
2043                 for failure in failed_channels.drain(..) {
2044                         self.finish_force_close_channel(failure);
2045                 }
2046                 if !new_events.is_empty() {
2047                         let mut pending_events = self.pending_events.lock().unwrap();
2048                         for funding_locked in new_events.drain(..) {
2049                                 pending_events.push(funding_locked);
2050                         }
2051                 }
2052                 self.latest_block_height.fetch_sub(1, Ordering::AcqRel);
2053         }
2054 }
2055
2056 macro_rules! handle_error {
2057         ($self: ident, $internal: expr, $their_node_id: expr) => {
2058                 match $internal {
2059                         Ok(msg) => Ok(msg),
2060                         Err(MsgHandleErrInternal { err, needs_channel_force_close }) => {
2061                                 if needs_channel_force_close {
2062                                         match &err.action {
2063                                                 &Some(msgs::ErrorAction::DisconnectPeer { msg: Some(ref msg) }) => {
2064                                                         if msg.channel_id == [0; 32] {
2065                                                                 $self.peer_disconnected(&$their_node_id, true);
2066                                                         } else {
2067                                                                 $self.force_close_channel(&msg.channel_id);
2068                                                         }
2069                                                 },
2070                                                 &Some(msgs::ErrorAction::DisconnectPeer { msg: None }) => {},
2071                                                 &Some(msgs::ErrorAction::IgnoreError) => {},
2072                                                 &Some(msgs::ErrorAction::SendErrorMessage { ref msg }) => {
2073                                                         if msg.channel_id == [0; 32] {
2074                                                                 $self.peer_disconnected(&$their_node_id, true);
2075                                                         } else {
2076                                                                 $self.force_close_channel(&msg.channel_id);
2077                                                         }
2078                                                 },
2079                                                 &None => {},
2080                                         }
2081                                 }
2082                                 Err(err)
2083                         },
2084                 }
2085         }
2086 }
2087
2088 impl ChannelMessageHandler for ChannelManager {
2089         //TODO: Handle errors and close channel (or so)
2090         fn handle_open_channel(&self, their_node_id: &PublicKey, msg: &msgs::OpenChannel) -> Result<msgs::AcceptChannel, HandleError> {
2091                 handle_error!(self, self.internal_open_channel(their_node_id, msg), their_node_id)
2092         }
2093
2094         fn handle_accept_channel(&self, their_node_id: &PublicKey, msg: &msgs::AcceptChannel) -> Result<(), HandleError> {
2095                 handle_error!(self, self.internal_accept_channel(their_node_id, msg), their_node_id)
2096         }
2097
2098         fn handle_funding_created(&self, their_node_id: &PublicKey, msg: &msgs::FundingCreated) -> Result<msgs::FundingSigned, HandleError> {
2099                 handle_error!(self, self.internal_funding_created(their_node_id, msg), their_node_id)
2100         }
2101
2102         fn handle_funding_signed(&self, their_node_id: &PublicKey, msg: &msgs::FundingSigned) -> Result<(), HandleError> {
2103                 handle_error!(self, self.internal_funding_signed(their_node_id, msg), their_node_id)
2104         }
2105
2106         fn handle_funding_locked(&self, their_node_id: &PublicKey, msg: &msgs::FundingLocked) -> Result<Option<msgs::AnnouncementSignatures>, HandleError> {
2107                 handle_error!(self, self.internal_funding_locked(their_node_id, msg), their_node_id)
2108         }
2109
2110         fn handle_shutdown(&self, their_node_id: &PublicKey, msg: &msgs::Shutdown) -> Result<(Option<msgs::Shutdown>, Option<msgs::ClosingSigned>), HandleError> {
2111                 handle_error!(self, self.internal_shutdown(their_node_id, msg), their_node_id)
2112         }
2113
2114         fn handle_closing_signed(&self, their_node_id: &PublicKey, msg: &msgs::ClosingSigned) -> Result<Option<msgs::ClosingSigned>, HandleError> {
2115                 handle_error!(self, self.internal_closing_signed(their_node_id, msg), their_node_id)
2116         }
2117
2118         fn handle_update_add_htlc(&self, their_node_id: &PublicKey, msg: &msgs::UpdateAddHTLC) -> Result<(), msgs::HandleError> {
2119                 handle_error!(self, self.internal_update_add_htlc(their_node_id, msg), their_node_id)
2120         }
2121
2122         fn handle_update_fulfill_htlc(&self, their_node_id: &PublicKey, msg: &msgs::UpdateFulfillHTLC) -> Result<(), HandleError> {
2123                 handle_error!(self, self.internal_update_fulfill_htlc(their_node_id, msg), their_node_id)
2124         }
2125
2126         fn handle_update_fail_htlc(&self, their_node_id: &PublicKey, msg: &msgs::UpdateFailHTLC) -> Result<Option<msgs::HTLCFailChannelUpdate>, HandleError> {
2127                 handle_error!(self, self.internal_update_fail_htlc(their_node_id, msg), their_node_id)
2128         }
2129
2130         fn handle_update_fail_malformed_htlc(&self, their_node_id: &PublicKey, msg: &msgs::UpdateFailMalformedHTLC) -> Result<(), HandleError> {
2131                 handle_error!(self, self.internal_update_fail_malformed_htlc(their_node_id, msg), their_node_id)
2132         }
2133
2134         fn handle_commitment_signed(&self, their_node_id: &PublicKey, msg: &msgs::CommitmentSigned) -> Result<(msgs::RevokeAndACK, Option<msgs::CommitmentSigned>), HandleError> {
2135                 handle_error!(self, self.internal_commitment_signed(their_node_id, msg), their_node_id)
2136         }
2137
2138         fn handle_revoke_and_ack(&self, their_node_id: &PublicKey, msg: &msgs::RevokeAndACK) -> Result<Option<msgs::CommitmentUpdate>, HandleError> {
2139                 handle_error!(self, self.internal_revoke_and_ack(their_node_id, msg), their_node_id)
2140         }
2141
2142         fn handle_update_fee(&self, their_node_id: &PublicKey, msg: &msgs::UpdateFee) -> Result<(), HandleError> {
2143                 handle_error!(self, self.internal_update_fee(their_node_id, msg), their_node_id)
2144         }
2145
2146         fn handle_announcement_signatures(&self, their_node_id: &PublicKey, msg: &msgs::AnnouncementSignatures) -> Result<(), HandleError> {
2147                 handle_error!(self, self.internal_announcement_signatures(their_node_id, msg), their_node_id)
2148         }
2149
2150         fn handle_channel_reestablish(&self, their_node_id: &PublicKey, msg: &msgs::ChannelReestablish) -> Result<(Option<msgs::FundingLocked>, Option<msgs::RevokeAndACK>, Option<msgs::CommitmentUpdate>), HandleError> {
2151                 handle_error!(self, self.internal_channel_reestablish(their_node_id, msg), their_node_id)
2152         }
2153
2154         fn peer_disconnected(&self, their_node_id: &PublicKey, no_connection_possible: bool) {
2155                 let mut new_events = Vec::new();
2156                 let mut failed_channels = Vec::new();
2157                 let mut failed_payments = Vec::new();
2158                 {
2159                         let mut channel_state_lock = self.channel_state.lock().unwrap();
2160                         let channel_state = channel_state_lock.borrow_parts();
2161                         let short_to_id = channel_state.short_to_id;
2162                         if no_connection_possible {
2163                                 channel_state.by_id.retain(|_, chan| {
2164                                         if chan.get_their_node_id() == *their_node_id {
2165                                                 if let Some(short_id) = chan.get_short_channel_id() {
2166                                                         short_to_id.remove(&short_id);
2167                                                 }
2168                                                 failed_channels.push(chan.force_shutdown());
2169                                                 if let Ok(update) = self.get_channel_update(&chan) {
2170                                                         new_events.push(events::Event::BroadcastChannelUpdate {
2171                                                                 msg: update
2172                                                         });
2173                                                 }
2174                                                 false
2175                                         } else {
2176                                                 true
2177                                         }
2178                                 });
2179                         } else {
2180                                 channel_state.by_id.retain(|_, chan| {
2181                                         if chan.get_their_node_id() == *their_node_id {
2182                                                 //TODO: mark channel disabled (and maybe announce such after a timeout).
2183                                                 let failed_adds = chan.remove_uncommitted_htlcs_and_mark_paused();
2184                                                 if !failed_adds.is_empty() {
2185                                                         let chan_update = self.get_channel_update(&chan).map(|u| u.encode_with_len()).unwrap(); // Cannot add/recv HTLCs before we have a short_id so unwrap is safe
2186                                                         failed_payments.push((chan_update, failed_adds));
2187                                                 }
2188                                                 if chan.is_shutdown() {
2189                                                         if let Some(short_id) = chan.get_short_channel_id() {
2190                                                                 short_to_id.remove(&short_id);
2191                                                         }
2192                                                         return false;
2193                                                 }
2194                                         }
2195                                         true
2196                                 })
2197                         }
2198                 }
2199                 for failure in failed_channels.drain(..) {
2200                         self.finish_force_close_channel(failure);
2201                 }
2202                 if !new_events.is_empty() {
2203                         let mut pending_events = self.pending_events.lock().unwrap();
2204                         for event in new_events.drain(..) {
2205                                 pending_events.push(event);
2206                         }
2207                 }
2208                 for (chan_update, mut htlc_sources) in failed_payments {
2209                         for (htlc_source, payment_hash) in htlc_sources.drain(..) {
2210                                 self.fail_htlc_backwards_internal(self.channel_state.lock().unwrap(), htlc_source, &payment_hash, HTLCFailReason::Reason { failure_code: 0x1000 | 7, data: chan_update.clone() });
2211                         }
2212                 }
2213         }
2214
2215         fn peer_connected(&self, their_node_id: &PublicKey) -> Vec<msgs::ChannelReestablish> {
2216                 let mut res = Vec::new();
2217                 let mut channel_state = self.channel_state.lock().unwrap();
2218                 channel_state.by_id.retain(|_, chan| {
2219                         if chan.get_their_node_id() == *their_node_id {
2220                                 if !chan.have_received_message() {
2221                                         // If we created this (outbound) channel while we were disconnected from the
2222                                         // peer we probably failed to send the open_channel message, which is now
2223                                         // lost. We can't have had anything pending related to this channel, so we just
2224                                         // drop it.
2225                                         false
2226                                 } else {
2227                                         res.push(chan.get_channel_reestablish());
2228                                         true
2229                                 }
2230                         } else { true }
2231                 });
2232                 //TODO: Also re-broadcast announcement_signatures
2233                 res
2234         }
2235
2236         fn handle_error(&self, their_node_id: &PublicKey, msg: &msgs::ErrorMessage) {
2237                 if msg.channel_id == [0; 32] {
2238                         for chan in self.list_channels() {
2239                                 if chan.remote_network_id == *their_node_id {
2240                                         self.force_close_channel(&chan.channel_id);
2241                                 }
2242                         }
2243                 } else {
2244                         self.force_close_channel(&msg.channel_id);
2245                 }
2246         }
2247 }
2248
2249 #[cfg(test)]
2250 mod tests {
2251         use chain::chaininterface;
2252         use chain::transaction::OutPoint;
2253         use chain::chaininterface::ChainListener;
2254         use ln::channelmanager::{ChannelManager,OnionKeys};
2255         use ln::router::{Route, RouteHop, Router};
2256         use ln::msgs;
2257         use ln::msgs::{ChannelMessageHandler,RoutingMessageHandler};
2258         use util::test_utils;
2259         use util::events::{Event, EventsProvider};
2260         use util::errors::APIError;
2261         use util::logger::Logger;
2262         use util::ser::Writeable;
2263
2264         use bitcoin::util::hash::Sha256dHash;
2265         use bitcoin::blockdata::block::{Block, BlockHeader};
2266         use bitcoin::blockdata::transaction::{Transaction, TxOut};
2267         use bitcoin::blockdata::constants::genesis_block;
2268         use bitcoin::network::constants::Network;
2269         use bitcoin::network::serialize::serialize;
2270         use bitcoin::network::serialize::BitcoinHash;
2271
2272         use hex;
2273
2274         use secp256k1::{Secp256k1, Message};
2275         use secp256k1::key::{PublicKey,SecretKey};
2276
2277         use crypto::sha2::Sha256;
2278         use crypto::digest::Digest;
2279
2280         use rand::{thread_rng,Rng};
2281
2282         use std::cell::RefCell;
2283         use std::collections::HashMap;
2284         use std::default::Default;
2285         use std::rc::Rc;
2286         use std::sync::{Arc, Mutex};
2287         use std::time::Instant;
2288         use std::mem;
2289
2290         fn build_test_onion_keys() -> Vec<OnionKeys> {
2291                 // Keys from BOLT 4, used in both test vector tests
2292                 let secp_ctx = Secp256k1::new();
2293
2294                 let route = Route {
2295                         hops: vec!(
2296                                         RouteHop {
2297                                                 pubkey: PublicKey::from_slice(&secp_ctx, &hex::decode("02eec7245d6b7d2ccb30380bfbe2a3648cd7a942653f5aa340edcea1f283686619").unwrap()[..]).unwrap(),
2298                                                 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
2299                                         },
2300                                         RouteHop {
2301                                                 pubkey: PublicKey::from_slice(&secp_ctx, &hex::decode("0324653eac434488002cc06bbfb7f10fe18991e35f9fe4302dbea6d2353dc0ab1c").unwrap()[..]).unwrap(),
2302                                                 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
2303                                         },
2304                                         RouteHop {
2305                                                 pubkey: PublicKey::from_slice(&secp_ctx, &hex::decode("027f31ebc5462c1fdce1b737ecff52d37d75dea43ce11c74d25aa297165faa2007").unwrap()[..]).unwrap(),
2306                                                 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
2307                                         },
2308                                         RouteHop {
2309                                                 pubkey: PublicKey::from_slice(&secp_ctx, &hex::decode("032c0b7cf95324a07d05398b240174dc0c2be444d96b159aa6c7f7b1e668680991").unwrap()[..]).unwrap(),
2310                                                 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
2311                                         },
2312                                         RouteHop {
2313                                                 pubkey: PublicKey::from_slice(&secp_ctx, &hex::decode("02edabbd16b41c8371b92ef2f04c1185b4f03b6dcd52ba9b78d9d7c89c8f221145").unwrap()[..]).unwrap(),
2314                                                 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
2315                                         },
2316                         ),
2317                 };
2318
2319                 let session_priv = SecretKey::from_slice(&secp_ctx, &hex::decode("4141414141414141414141414141414141414141414141414141414141414141").unwrap()[..]).unwrap();
2320
2321                 let onion_keys = ChannelManager::construct_onion_keys(&secp_ctx, &route, &session_priv).unwrap();
2322                 assert_eq!(onion_keys.len(), route.hops.len());
2323                 onion_keys
2324         }
2325
2326         #[test]
2327         fn onion_vectors() {
2328                 // Packet creation test vectors from BOLT 4
2329                 let onion_keys = build_test_onion_keys();
2330
2331                 assert_eq!(onion_keys[0].shared_secret[..], hex::decode("53eb63ea8a3fec3b3cd433b85cd62a4b145e1dda09391b348c4e1cd36a03ea66").unwrap()[..]);
2332                 assert_eq!(onion_keys[0].blinding_factor[..], hex::decode("2ec2e5da605776054187180343287683aa6a51b4b1c04d6dd49c45d8cffb3c36").unwrap()[..]);
2333                 assert_eq!(onion_keys[0].ephemeral_pubkey.serialize()[..], hex::decode("02eec7245d6b7d2ccb30380bfbe2a3648cd7a942653f5aa340edcea1f283686619").unwrap()[..]);
2334                 assert_eq!(onion_keys[0].rho, hex::decode("ce496ec94def95aadd4bec15cdb41a740c9f2b62347c4917325fcc6fb0453986").unwrap()[..]);
2335                 assert_eq!(onion_keys[0].mu, hex::decode("b57061dc6d0a2b9f261ac410c8b26d64ac5506cbba30267a649c28c179400eba").unwrap()[..]);
2336
2337                 assert_eq!(onion_keys[1].shared_secret[..], hex::decode("a6519e98832a0b179f62123b3567c106db99ee37bef036e783263602f3488fae").unwrap()[..]);
2338                 assert_eq!(onion_keys[1].blinding_factor[..], hex::decode("bf66c28bc22e598cfd574a1931a2bafbca09163df2261e6d0056b2610dab938f").unwrap()[..]);
2339                 assert_eq!(onion_keys[1].ephemeral_pubkey.serialize()[..], hex::decode("028f9438bfbf7feac2e108d677e3a82da596be706cc1cf342b75c7b7e22bf4e6e2").unwrap()[..]);
2340                 assert_eq!(onion_keys[1].rho, hex::decode("450ffcabc6449094918ebe13d4f03e433d20a3d28a768203337bc40b6e4b2c59").unwrap()[..]);
2341                 assert_eq!(onion_keys[1].mu, hex::decode("05ed2b4a3fb023c2ff5dd6ed4b9b6ea7383f5cfe9d59c11d121ec2c81ca2eea9").unwrap()[..]);
2342
2343                 assert_eq!(onion_keys[2].shared_secret[..], hex::decode("3a6b412548762f0dbccce5c7ae7bb8147d1caf9b5471c34120b30bc9c04891cc").unwrap()[..]);
2344                 assert_eq!(onion_keys[2].blinding_factor[..], hex::decode("a1f2dadd184eb1627049673f18c6325814384facdee5bfd935d9cb031a1698a5").unwrap()[..]);
2345                 assert_eq!(onion_keys[2].ephemeral_pubkey.serialize()[..], hex::decode("03bfd8225241ea71cd0843db7709f4c222f62ff2d4516fd38b39914ab6b83e0da0").unwrap()[..]);
2346                 assert_eq!(onion_keys[2].rho, hex::decode("11bf5c4f960239cb37833936aa3d02cea82c0f39fd35f566109c41f9eac8deea").unwrap()[..]);
2347                 assert_eq!(onion_keys[2].mu, hex::decode("caafe2820fa00eb2eeb78695ae452eba38f5a53ed6d53518c5c6edf76f3f5b78").unwrap()[..]);
2348
2349                 assert_eq!(onion_keys[3].shared_secret[..], hex::decode("21e13c2d7cfe7e18836df50872466117a295783ab8aab0e7ecc8c725503ad02d").unwrap()[..]);
2350                 assert_eq!(onion_keys[3].blinding_factor[..], hex::decode("7cfe0b699f35525029ae0fa437c69d0f20f7ed4e3916133f9cacbb13c82ff262").unwrap()[..]);
2351                 assert_eq!(onion_keys[3].ephemeral_pubkey.serialize()[..], hex::decode("031dde6926381289671300239ea8e57ffaf9bebd05b9a5b95beaf07af05cd43595").unwrap()[..]);
2352                 assert_eq!(onion_keys[3].rho, hex::decode("cbe784ab745c13ff5cffc2fbe3e84424aa0fd669b8ead4ee562901a4a4e89e9e").unwrap()[..]);
2353                 assert_eq!(onion_keys[3].mu, hex::decode("5052aa1b3d9f0655a0932e50d42f0c9ba0705142c25d225515c45f47c0036ee9").unwrap()[..]);
2354
2355                 assert_eq!(onion_keys[4].shared_secret[..], hex::decode("b5756b9b542727dbafc6765a49488b023a725d631af688fc031217e90770c328").unwrap()[..]);
2356                 assert_eq!(onion_keys[4].blinding_factor[..], hex::decode("c96e00dddaf57e7edcd4fb5954be5b65b09f17cb6d20651b4e90315be5779205").unwrap()[..]);
2357                 assert_eq!(onion_keys[4].ephemeral_pubkey.serialize()[..], hex::decode("03a214ebd875aab6ddfd77f22c5e7311d7f77f17a169e599f157bbcdae8bf071f4").unwrap()[..]);
2358                 assert_eq!(onion_keys[4].rho, hex::decode("034e18b8cc718e8af6339106e706c52d8df89e2b1f7e9142d996acf88df8799b").unwrap()[..]);
2359                 assert_eq!(onion_keys[4].mu, hex::decode("8e45e5c61c2b24cb6382444db6698727afb063adecd72aada233d4bf273d975a").unwrap()[..]);
2360
2361                 // Test vectors below are flat-out wrong: they claim to set outgoing_cltv_value to non-0 :/
2362                 let payloads = vec!(
2363                         msgs::OnionHopData {
2364                                 realm: 0,
2365                                 data: msgs::OnionRealm0HopData {
2366                                         short_channel_id: 0,
2367                                         amt_to_forward: 0,
2368                                         outgoing_cltv_value: 0,
2369                                 },
2370                                 hmac: [0; 32],
2371                         },
2372                         msgs::OnionHopData {
2373                                 realm: 0,
2374                                 data: msgs::OnionRealm0HopData {
2375                                         short_channel_id: 0x0101010101010101,
2376                                         amt_to_forward: 0x0100000001,
2377                                         outgoing_cltv_value: 0,
2378                                 },
2379                                 hmac: [0; 32],
2380                         },
2381                         msgs::OnionHopData {
2382                                 realm: 0,
2383                                 data: msgs::OnionRealm0HopData {
2384                                         short_channel_id: 0x0202020202020202,
2385                                         amt_to_forward: 0x0200000002,
2386                                         outgoing_cltv_value: 0,
2387                                 },
2388                                 hmac: [0; 32],
2389                         },
2390                         msgs::OnionHopData {
2391                                 realm: 0,
2392                                 data: msgs::OnionRealm0HopData {
2393                                         short_channel_id: 0x0303030303030303,
2394                                         amt_to_forward: 0x0300000003,
2395                                         outgoing_cltv_value: 0,
2396                                 },
2397                                 hmac: [0; 32],
2398                         },
2399                         msgs::OnionHopData {
2400                                 realm: 0,
2401                                 data: msgs::OnionRealm0HopData {
2402                                         short_channel_id: 0x0404040404040404,
2403                                         amt_to_forward: 0x0400000004,
2404                                         outgoing_cltv_value: 0,
2405                                 },
2406                                 hmac: [0; 32],
2407                         },
2408                 );
2409
2410                 let packet = ChannelManager::construct_onion_packet(payloads, onion_keys, &[0x42; 32]);
2411                 // Just check the final packet encoding, as it includes all the per-hop vectors in it
2412                 // anyway...
2413                 assert_eq!(packet.encode(), hex::decode("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").unwrap());
2414         }
2415
2416         #[test]
2417         fn test_failure_packet_onion() {
2418                 // Returning Errors test vectors from BOLT 4
2419
2420                 let onion_keys = build_test_onion_keys();
2421                 let onion_error = ChannelManager::build_failure_packet(&onion_keys[4].shared_secret, 0x2002, &[0; 0]);
2422                 assert_eq!(onion_error.encode(), hex::decode("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").unwrap());
2423
2424                 let onion_packet_1 = ChannelManager::encrypt_failure_packet(&onion_keys[4].shared_secret, &onion_error.encode()[..]);
2425                 assert_eq!(onion_packet_1.data, hex::decode("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").unwrap());
2426
2427                 let onion_packet_2 = ChannelManager::encrypt_failure_packet(&onion_keys[3].shared_secret, &onion_packet_1.data[..]);
2428                 assert_eq!(onion_packet_2.data, hex::decode("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").unwrap());
2429
2430                 let onion_packet_3 = ChannelManager::encrypt_failure_packet(&onion_keys[2].shared_secret, &onion_packet_2.data[..]);
2431                 assert_eq!(onion_packet_3.data, hex::decode("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").unwrap());
2432
2433                 let onion_packet_4 = ChannelManager::encrypt_failure_packet(&onion_keys[1].shared_secret, &onion_packet_3.data[..]);
2434                 assert_eq!(onion_packet_4.data, hex::decode("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").unwrap());
2435
2436                 let onion_packet_5 = ChannelManager::encrypt_failure_packet(&onion_keys[0].shared_secret, &onion_packet_4.data[..]);
2437                 assert_eq!(onion_packet_5.data, hex::decode("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").unwrap());
2438         }
2439
2440         fn confirm_transaction(chain: &chaininterface::ChainWatchInterfaceUtil, tx: &Transaction, chan_id: u32) {
2441                 assert!(chain.does_match_tx(tx));
2442                 let mut header = BlockHeader { version: 0x20000000, prev_blockhash: Default::default(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
2443                 chain.block_connected_checked(&header, 1, &[tx; 1], &[chan_id; 1]);
2444                 for i in 2..100 {
2445                         header = BlockHeader { version: 0x20000000, prev_blockhash: header.bitcoin_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
2446                         chain.block_connected_checked(&header, i, &[tx; 0], &[0; 0]);
2447                 }
2448         }
2449
2450         struct Node {
2451                 chain_monitor: Arc<chaininterface::ChainWatchInterfaceUtil>,
2452                 tx_broadcaster: Arc<test_utils::TestBroadcaster>,
2453                 chan_monitor: Arc<test_utils::TestChannelMonitor>,
2454                 node: Arc<ChannelManager>,
2455                 router: Router,
2456                 network_payment_count: Rc<RefCell<u8>>,
2457                 network_chan_count: Rc<RefCell<u32>>,
2458         }
2459         impl Drop for Node {
2460                 fn drop(&mut self) {
2461                         // Check that we processed all pending events
2462                         assert_eq!(self.node.get_and_clear_pending_events().len(), 0);
2463                         assert_eq!(self.chan_monitor.added_monitors.lock().unwrap().len(), 0);
2464                 }
2465         }
2466
2467         fn create_chan_between_nodes(node_a: &Node, node_b: &Node) -> (msgs::ChannelAnnouncement, msgs::ChannelUpdate, msgs::ChannelUpdate, [u8; 32], Transaction) {
2468                 node_a.node.create_channel(node_b.node.get_our_node_id(), 100000, 10001, 42).unwrap();
2469
2470                 let events_1 = node_a.node.get_and_clear_pending_events();
2471                 assert_eq!(events_1.len(), 1);
2472                 let accept_chan = match events_1[0] {
2473                         Event::SendOpenChannel { ref node_id, ref msg } => {
2474                                 assert_eq!(*node_id, node_b.node.get_our_node_id());
2475                                 node_b.node.handle_open_channel(&node_a.node.get_our_node_id(), msg).unwrap()
2476                         },
2477                         _ => panic!("Unexpected event"),
2478                 };
2479
2480                 node_a.node.handle_accept_channel(&node_b.node.get_our_node_id(), &accept_chan).unwrap();
2481
2482                 let chan_id = *node_a.network_chan_count.borrow();
2483                 let tx;
2484                 let funding_output;
2485
2486                 let events_2 = node_a.node.get_and_clear_pending_events();
2487                 assert_eq!(events_2.len(), 1);
2488                 match events_2[0] {
2489                         Event::FundingGenerationReady { ref temporary_channel_id, ref channel_value_satoshis, ref output_script, user_channel_id } => {
2490                                 assert_eq!(*channel_value_satoshis, 100000);
2491                                 assert_eq!(user_channel_id, 42);
2492
2493                                 tx = Transaction { version: chan_id as u32, lock_time: 0, input: Vec::new(), output: vec![TxOut {
2494                                         value: *channel_value_satoshis, script_pubkey: output_script.clone(),
2495                                 }]};
2496                                 funding_output = OutPoint::new(Sha256dHash::from_data(&serialize(&tx).unwrap()[..]), 0);
2497
2498                                 node_a.node.funding_transaction_generated(&temporary_channel_id, funding_output);
2499                                 let mut added_monitors = node_a.chan_monitor.added_monitors.lock().unwrap();
2500                                 assert_eq!(added_monitors.len(), 1);
2501                                 assert_eq!(added_monitors[0].0, funding_output);
2502                                 added_monitors.clear();
2503                         },
2504                         _ => panic!("Unexpected event"),
2505                 }
2506
2507                 let events_3 = node_a.node.get_and_clear_pending_events();
2508                 assert_eq!(events_3.len(), 1);
2509                 let funding_signed = match events_3[0] {
2510                         Event::SendFundingCreated { ref node_id, ref msg } => {
2511                                 assert_eq!(*node_id, node_b.node.get_our_node_id());
2512                                 let res = node_b.node.handle_funding_created(&node_a.node.get_our_node_id(), msg).unwrap();
2513                                 let mut added_monitors = node_b.chan_monitor.added_monitors.lock().unwrap();
2514                                 assert_eq!(added_monitors.len(), 1);
2515                                 assert_eq!(added_monitors[0].0, funding_output);
2516                                 added_monitors.clear();
2517                                 res
2518                         },
2519                         _ => panic!("Unexpected event"),
2520                 };
2521
2522                 node_a.node.handle_funding_signed(&node_b.node.get_our_node_id(), &funding_signed).unwrap();
2523                 {
2524                         let mut added_monitors = node_a.chan_monitor.added_monitors.lock().unwrap();
2525                         assert_eq!(added_monitors.len(), 1);
2526                         assert_eq!(added_monitors[0].0, funding_output);
2527                         added_monitors.clear();
2528                 }
2529
2530                 let events_4 = node_a.node.get_and_clear_pending_events();
2531                 assert_eq!(events_4.len(), 1);
2532                 match events_4[0] {
2533                         Event::FundingBroadcastSafe { ref funding_txo, user_channel_id } => {
2534                                 assert_eq!(user_channel_id, 42);
2535                                 assert_eq!(*funding_txo, funding_output);
2536                         },
2537                         _ => panic!("Unexpected event"),
2538                 };
2539
2540                 confirm_transaction(&node_a.chain_monitor, &tx, chan_id);
2541                 let events_5 = node_a.node.get_and_clear_pending_events();
2542                 assert_eq!(events_5.len(), 1);
2543                 match events_5[0] {
2544                         Event::SendFundingLocked { ref node_id, ref msg, ref announcement_sigs } => {
2545                                 assert_eq!(*node_id, node_b.node.get_our_node_id());
2546                                 assert!(announcement_sigs.is_none());
2547                                 node_b.node.handle_funding_locked(&node_a.node.get_our_node_id(), msg).unwrap()
2548                         },
2549                         _ => panic!("Unexpected event"),
2550                 };
2551
2552                 let channel_id;
2553
2554                 confirm_transaction(&node_b.chain_monitor, &tx, chan_id);
2555                 let events_6 = node_b.node.get_and_clear_pending_events();
2556                 assert_eq!(events_6.len(), 1);
2557                 let as_announcement_sigs = match events_6[0] {
2558                         Event::SendFundingLocked { ref node_id, ref msg, ref announcement_sigs } => {
2559                                 assert_eq!(*node_id, node_a.node.get_our_node_id());
2560                                 channel_id = msg.channel_id.clone();
2561                                 let as_announcement_sigs = node_a.node.handle_funding_locked(&node_b.node.get_our_node_id(), msg).unwrap().unwrap();
2562                                 node_a.node.handle_announcement_signatures(&node_b.node.get_our_node_id(), &(*announcement_sigs).clone().unwrap()).unwrap();
2563                                 as_announcement_sigs
2564                         },
2565                         _ => panic!("Unexpected event"),
2566                 };
2567
2568                 let events_7 = node_a.node.get_and_clear_pending_events();
2569                 assert_eq!(events_7.len(), 1);
2570                 let (announcement, as_update) = match events_7[0] {
2571                         Event::BroadcastChannelAnnouncement { ref msg, ref update_msg } => {
2572                                 (msg, update_msg)
2573                         },
2574                         _ => panic!("Unexpected event"),
2575                 };
2576
2577                 node_b.node.handle_announcement_signatures(&node_a.node.get_our_node_id(), &as_announcement_sigs).unwrap();
2578                 let events_8 = node_b.node.get_and_clear_pending_events();
2579                 assert_eq!(events_8.len(), 1);
2580                 let bs_update = match events_8[0] {
2581                         Event::BroadcastChannelAnnouncement { ref msg, ref update_msg } => {
2582                                 assert!(*announcement == *msg);
2583                                 update_msg
2584                         },
2585                         _ => panic!("Unexpected event"),
2586                 };
2587
2588                 *node_a.network_chan_count.borrow_mut() += 1;
2589
2590                 ((*announcement).clone(), (*as_update).clone(), (*bs_update).clone(), channel_id, tx)
2591         }
2592
2593         fn create_announced_chan_between_nodes(nodes: &Vec<Node>, a: usize, b: usize) -> (msgs::ChannelUpdate, msgs::ChannelUpdate, [u8; 32], Transaction) {
2594                 let chan_announcement = create_chan_between_nodes(&nodes[a], &nodes[b]);
2595                 for node in nodes {
2596                         assert!(node.router.handle_channel_announcement(&chan_announcement.0).unwrap());
2597                         node.router.handle_channel_update(&chan_announcement.1).unwrap();
2598                         node.router.handle_channel_update(&chan_announcement.2).unwrap();
2599                 }
2600                 (chan_announcement.1, chan_announcement.2, chan_announcement.3, chan_announcement.4)
2601         }
2602
2603         fn close_channel(outbound_node: &Node, inbound_node: &Node, channel_id: &[u8; 32], funding_tx: Transaction, close_inbound_first: bool) -> (msgs::ChannelUpdate, msgs::ChannelUpdate) {
2604                 let (node_a, broadcaster_a) = if close_inbound_first { (&inbound_node.node, &inbound_node.tx_broadcaster) } else { (&outbound_node.node, &outbound_node.tx_broadcaster) };
2605                 let (node_b, broadcaster_b) = if close_inbound_first { (&outbound_node.node, &outbound_node.tx_broadcaster) } else { (&inbound_node.node, &inbound_node.tx_broadcaster) };
2606                 let (tx_a, tx_b);
2607
2608                 node_a.close_channel(channel_id).unwrap();
2609                 let events_1 = node_a.get_and_clear_pending_events();
2610                 assert_eq!(events_1.len(), 1);
2611                 let shutdown_a = match events_1[0] {
2612                         Event::SendShutdown { ref node_id, ref msg } => {
2613                                 assert_eq!(node_id, &node_b.get_our_node_id());
2614                                 msg.clone()
2615                         },
2616                         _ => panic!("Unexpected event"),
2617                 };
2618
2619                 let (shutdown_b, mut closing_signed_b) = node_b.handle_shutdown(&node_a.get_our_node_id(), &shutdown_a).unwrap();
2620                 if !close_inbound_first {
2621                         assert!(closing_signed_b.is_none());
2622                 }
2623                 let (empty_a, mut closing_signed_a) = node_a.handle_shutdown(&node_b.get_our_node_id(), &shutdown_b.unwrap()).unwrap();
2624                 assert!(empty_a.is_none());
2625                 if close_inbound_first {
2626                         assert!(closing_signed_a.is_none());
2627                         closing_signed_a = node_a.handle_closing_signed(&node_b.get_our_node_id(), &closing_signed_b.unwrap()).unwrap();
2628                         assert_eq!(broadcaster_a.txn_broadcasted.lock().unwrap().len(), 1);
2629                         tx_a = broadcaster_a.txn_broadcasted.lock().unwrap().remove(0);
2630
2631                         let empty_b = node_b.handle_closing_signed(&node_a.get_our_node_id(), &closing_signed_a.unwrap()).unwrap();
2632                         assert!(empty_b.is_none());
2633                         assert_eq!(broadcaster_b.txn_broadcasted.lock().unwrap().len(), 1);
2634                         tx_b = broadcaster_b.txn_broadcasted.lock().unwrap().remove(0);
2635                 } else {
2636                         closing_signed_b = node_b.handle_closing_signed(&node_a.get_our_node_id(), &closing_signed_a.unwrap()).unwrap();
2637                         assert_eq!(broadcaster_b.txn_broadcasted.lock().unwrap().len(), 1);
2638                         tx_b = broadcaster_b.txn_broadcasted.lock().unwrap().remove(0);
2639
2640                         let empty_a2 = node_a.handle_closing_signed(&node_b.get_our_node_id(), &closing_signed_b.unwrap()).unwrap();
2641                         assert!(empty_a2.is_none());
2642                         assert_eq!(broadcaster_a.txn_broadcasted.lock().unwrap().len(), 1);
2643                         tx_a = broadcaster_a.txn_broadcasted.lock().unwrap().remove(0);
2644                 }
2645                 assert_eq!(tx_a, tx_b);
2646                 let mut funding_tx_map = HashMap::new();
2647                 funding_tx_map.insert(funding_tx.txid(), funding_tx);
2648                 tx_a.verify(&funding_tx_map).unwrap();
2649
2650                 let events_2 = node_a.get_and_clear_pending_events();
2651                 assert_eq!(events_2.len(), 1);
2652                 let as_update = match events_2[0] {
2653                         Event::BroadcastChannelUpdate { ref msg } => {
2654                                 msg.clone()
2655                         },
2656                         _ => panic!("Unexpected event"),
2657                 };
2658
2659                 let events_3 = node_b.get_and_clear_pending_events();
2660                 assert_eq!(events_3.len(), 1);
2661                 let bs_update = match events_3[0] {
2662                         Event::BroadcastChannelUpdate { ref msg } => {
2663                                 msg.clone()
2664                         },
2665                         _ => panic!("Unexpected event"),
2666                 };
2667
2668                 (as_update, bs_update)
2669         }
2670
2671         struct SendEvent {
2672                 node_id: PublicKey,
2673                 msgs: Vec<msgs::UpdateAddHTLC>,
2674                 commitment_msg: msgs::CommitmentSigned,
2675         }
2676         impl SendEvent {
2677                 fn from_event(event: Event) -> SendEvent {
2678                         match event {
2679                                 Event::UpdateHTLCs { node_id, updates: msgs::CommitmentUpdate { update_add_htlcs, update_fulfill_htlcs, update_fail_htlcs, update_fail_malformed_htlcs, commitment_signed } } => {
2680                                         assert!(update_fulfill_htlcs.is_empty());
2681                                         assert!(update_fail_htlcs.is_empty());
2682                                         assert!(update_fail_malformed_htlcs.is_empty());
2683                                         SendEvent { node_id: node_id, msgs: update_add_htlcs, commitment_msg: commitment_signed }
2684                                 },
2685                                 _ => panic!("Unexpected event type!"),
2686                         }
2687                 }
2688         }
2689
2690         macro_rules! commitment_signed_dance {
2691                 ($node_a: expr, $node_b: expr, $commitment_signed: expr, $fail_backwards: expr) => {
2692                         {
2693                                 {
2694                                         let added_monitors = $node_a.chan_monitor.added_monitors.lock().unwrap();
2695                                         assert!(added_monitors.is_empty());
2696                                 }
2697                                 let (as_revoke_and_ack, as_commitment_signed) = $node_a.node.handle_commitment_signed(&$node_b.node.get_our_node_id(), &$commitment_signed).unwrap();
2698                                 {
2699                                         let mut added_monitors = $node_a.chan_monitor.added_monitors.lock().unwrap();
2700                                         assert_eq!(added_monitors.len(), 1);
2701                                         added_monitors.clear();
2702                                 }
2703                                 {
2704                                         let added_monitors = $node_b.chan_monitor.added_monitors.lock().unwrap();
2705                                         assert!(added_monitors.is_empty());
2706                                 }
2707                                 assert!($node_b.node.handle_revoke_and_ack(&$node_a.node.get_our_node_id(), &as_revoke_and_ack).unwrap().is_none());
2708                                 {
2709                                         let mut added_monitors = $node_b.chan_monitor.added_monitors.lock().unwrap();
2710                                         assert_eq!(added_monitors.len(), 1);
2711                                         added_monitors.clear();
2712                                 }
2713                                 let (bs_revoke_and_ack, bs_none) = $node_b.node.handle_commitment_signed(&$node_a.node.get_our_node_id(), &as_commitment_signed.unwrap()).unwrap();
2714                                 assert!(bs_none.is_none());
2715                                 {
2716                                         let mut added_monitors = $node_b.chan_monitor.added_monitors.lock().unwrap();
2717                                         assert_eq!(added_monitors.len(), 1);
2718                                         added_monitors.clear();
2719                                 }
2720                                 if $fail_backwards {
2721                                         assert!($node_a.node.get_and_clear_pending_events().is_empty());
2722                                 }
2723                                 assert!($node_a.node.handle_revoke_and_ack(&$node_b.node.get_our_node_id(), &bs_revoke_and_ack).unwrap().is_none());
2724                                 {
2725                                         let mut added_monitors = $node_a.chan_monitor.added_monitors.lock().unwrap();
2726                                         if $fail_backwards {
2727                                                 assert_eq!(added_monitors.len(), 2);
2728                                                 assert!(added_monitors[0].0 != added_monitors[1].0);
2729                                         } else {
2730                                                 assert_eq!(added_monitors.len(), 1);
2731                                         }
2732                                         added_monitors.clear();
2733                                 }
2734                         }
2735                 }
2736         }
2737
2738         fn send_along_route(origin_node: &Node, route: Route, expected_route: &[&Node], recv_value: u64) -> ([u8; 32], [u8; 32]) {
2739                 let our_payment_preimage = [*origin_node.network_payment_count.borrow(); 32];
2740                 *origin_node.network_payment_count.borrow_mut() += 1;
2741                 let our_payment_hash = {
2742                         let mut sha = Sha256::new();
2743                         sha.input(&our_payment_preimage[..]);
2744                         let mut ret = [0; 32];
2745                         sha.result(&mut ret);
2746                         ret
2747                 };
2748
2749                 let mut payment_event = {
2750                         origin_node.node.send_payment(route, our_payment_hash).unwrap();
2751                         {
2752                                 let mut added_monitors = origin_node.chan_monitor.added_monitors.lock().unwrap();
2753                                 assert_eq!(added_monitors.len(), 1);
2754                                 added_monitors.clear();
2755                         }
2756
2757                         let mut events = origin_node.node.get_and_clear_pending_events();
2758                         assert_eq!(events.len(), 1);
2759                         SendEvent::from_event(events.remove(0))
2760                 };
2761                 let mut prev_node = origin_node;
2762
2763                 for (idx, &node) in expected_route.iter().enumerate() {
2764                         assert_eq!(node.node.get_our_node_id(), payment_event.node_id);
2765
2766                         node.node.handle_update_add_htlc(&prev_node.node.get_our_node_id(), &payment_event.msgs[0]).unwrap();
2767                         {
2768                                 let added_monitors = node.chan_monitor.added_monitors.lock().unwrap();
2769                                 assert_eq!(added_monitors.len(), 0);
2770                         }
2771
2772                         commitment_signed_dance!(node, prev_node, payment_event.commitment_msg, false);
2773
2774                         let events_1 = node.node.get_and_clear_pending_events();
2775                         assert_eq!(events_1.len(), 1);
2776                         match events_1[0] {
2777                                 Event::PendingHTLCsForwardable { .. } => { },
2778                                 _ => panic!("Unexpected event"),
2779                         };
2780
2781                         node.node.channel_state.lock().unwrap().next_forward = Instant::now();
2782                         node.node.process_pending_htlc_forwards();
2783
2784                         let mut events_2 = node.node.get_and_clear_pending_events();
2785                         assert_eq!(events_2.len(), 1);
2786                         if idx == expected_route.len() - 1 {
2787                                 match events_2[0] {
2788                                         Event::PaymentReceived { ref payment_hash, amt } => {
2789                                                 assert_eq!(our_payment_hash, *payment_hash);
2790                                                 assert_eq!(amt, recv_value);
2791                                         },
2792                                         _ => panic!("Unexpected event"),
2793                                 }
2794                         } else {
2795                                 {
2796                                         let mut added_monitors = node.chan_monitor.added_monitors.lock().unwrap();
2797                                         assert_eq!(added_monitors.len(), 1);
2798                                         added_monitors.clear();
2799                                 }
2800                                 payment_event = SendEvent::from_event(events_2.remove(0));
2801                                 assert_eq!(payment_event.msgs.len(), 1);
2802                         }
2803
2804                         prev_node = node;
2805                 }
2806
2807                 (our_payment_preimage, our_payment_hash)
2808         }
2809
2810         fn claim_payment_along_route(origin_node: &Node, expected_route: &[&Node], skip_last: bool, our_payment_preimage: [u8; 32]) {
2811                 assert!(expected_route.last().unwrap().node.claim_funds(our_payment_preimage));
2812                 {
2813                         let mut added_monitors = expected_route.last().unwrap().chan_monitor.added_monitors.lock().unwrap();
2814                         assert_eq!(added_monitors.len(), 1);
2815                         added_monitors.clear();
2816                 }
2817
2818                 let mut next_msgs: Option<(msgs::UpdateFulfillHTLC, msgs::CommitmentSigned)> = None;
2819                 macro_rules! update_fulfill_dance {
2820                         ($node: expr, $prev_node: expr, $last_node: expr) => {
2821                                 {
2822                                         $node.node.handle_update_fulfill_htlc(&$prev_node.node.get_our_node_id(), &next_msgs.as_ref().unwrap().0).unwrap();
2823                                         {
2824                                                 let mut added_monitors = $node.chan_monitor.added_monitors.lock().unwrap();
2825                                                 if $last_node {
2826                                                         assert_eq!(added_monitors.len(), 0);
2827                                                 } else {
2828                                                         assert_eq!(added_monitors.len(), 1);
2829                                                 }
2830                                                 added_monitors.clear();
2831                                         }
2832                                         commitment_signed_dance!($node, $prev_node, next_msgs.as_ref().unwrap().1, false);
2833                                 }
2834                         }
2835                 }
2836
2837                 let mut expected_next_node = expected_route.last().unwrap().node.get_our_node_id();
2838                 let mut prev_node = expected_route.last().unwrap();
2839                 for (idx, node) in expected_route.iter().rev().enumerate() {
2840                         assert_eq!(expected_next_node, node.node.get_our_node_id());
2841                         if next_msgs.is_some() {
2842                                 update_fulfill_dance!(node, prev_node, false);
2843                         }
2844
2845                         let events = node.node.get_and_clear_pending_events();
2846                         if !skip_last || idx != expected_route.len() - 1 {
2847                                 assert_eq!(events.len(), 1);
2848                                 match events[0] {
2849                                         Event::UpdateHTLCs { ref node_id, updates: msgs::CommitmentUpdate { ref update_add_htlcs, ref update_fulfill_htlcs, ref update_fail_htlcs, ref update_fail_malformed_htlcs, ref commitment_signed } } => {
2850                                                 assert!(update_add_htlcs.is_empty());
2851                                                 assert_eq!(update_fulfill_htlcs.len(), 1);
2852                                                 assert!(update_fail_htlcs.is_empty());
2853                                                 assert!(update_fail_malformed_htlcs.is_empty());
2854                                                 expected_next_node = node_id.clone();
2855                                                 next_msgs = Some((update_fulfill_htlcs[0].clone(), commitment_signed.clone()));
2856                                         },
2857                                         _ => panic!("Unexpected event"),
2858                                 }
2859                         } else {
2860                                 assert!(events.is_empty());
2861                         }
2862                         if !skip_last && idx == expected_route.len() - 1 {
2863                                 assert_eq!(expected_next_node, origin_node.node.get_our_node_id());
2864                         }
2865
2866                         prev_node = node;
2867                 }
2868
2869                 if !skip_last {
2870                         update_fulfill_dance!(origin_node, expected_route.first().unwrap(), true);
2871                         let events = origin_node.node.get_and_clear_pending_events();
2872                         assert_eq!(events.len(), 1);
2873                         match events[0] {
2874                                 Event::PaymentSent { payment_preimage } => {
2875                                         assert_eq!(payment_preimage, our_payment_preimage);
2876                                 },
2877                                 _ => panic!("Unexpected event"),
2878                         }
2879                 }
2880         }
2881
2882         fn claim_payment(origin_node: &Node, expected_route: &[&Node], our_payment_preimage: [u8; 32]) {
2883                 claim_payment_along_route(origin_node, expected_route, false, our_payment_preimage);
2884         }
2885
2886         const TEST_FINAL_CLTV: u32 = 32;
2887
2888         fn route_payment(origin_node: &Node, expected_route: &[&Node], recv_value: u64) -> ([u8; 32], [u8; 32]) {
2889                 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();
2890                 assert_eq!(route.hops.len(), expected_route.len());
2891                 for (node, hop) in expected_route.iter().zip(route.hops.iter()) {
2892                         assert_eq!(hop.pubkey, node.node.get_our_node_id());
2893                 }
2894
2895                 send_along_route(origin_node, route, expected_route, recv_value)
2896         }
2897
2898         fn route_over_limit(origin_node: &Node, expected_route: &[&Node], recv_value: u64) {
2899                 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();
2900                 assert_eq!(route.hops.len(), expected_route.len());
2901                 for (node, hop) in expected_route.iter().zip(route.hops.iter()) {
2902                         assert_eq!(hop.pubkey, node.node.get_our_node_id());
2903                 }
2904
2905                 let our_payment_preimage = [*origin_node.network_payment_count.borrow(); 32];
2906                 *origin_node.network_payment_count.borrow_mut() += 1;
2907                 let our_payment_hash = {
2908                         let mut sha = Sha256::new();
2909                         sha.input(&our_payment_preimage[..]);
2910                         let mut ret = [0; 32];
2911                         sha.result(&mut ret);
2912                         ret
2913                 };
2914
2915                 let err = origin_node.node.send_payment(route, our_payment_hash).err().unwrap();
2916                 match err {
2917                         APIError::RouteError{err} => assert_eq!(err, "Cannot send value that would put us over our max HTLC value in flight"),
2918                         _ => panic!("Unknown error variants"),
2919                 };
2920         }
2921
2922         fn send_payment(origin: &Node, expected_route: &[&Node], recv_value: u64) {
2923                 let our_payment_preimage = route_payment(&origin, expected_route, recv_value).0;
2924                 claim_payment(&origin, expected_route, our_payment_preimage);
2925         }
2926
2927         fn fail_payment_along_route(origin_node: &Node, expected_route: &[&Node], skip_last: bool, our_payment_hash: [u8; 32]) {
2928                 assert!(expected_route.last().unwrap().node.fail_htlc_backwards(&our_payment_hash));
2929                 {
2930                         let mut added_monitors = expected_route.last().unwrap().chan_monitor.added_monitors.lock().unwrap();
2931                         assert_eq!(added_monitors.len(), 1);
2932                         added_monitors.clear();
2933                 }
2934
2935                 let mut next_msgs: Option<(msgs::UpdateFailHTLC, msgs::CommitmentSigned)> = None;
2936                 macro_rules! update_fail_dance {
2937                         ($node: expr, $prev_node: expr, $last_node: expr) => {
2938                                 {
2939                                         $node.node.handle_update_fail_htlc(&$prev_node.node.get_our_node_id(), &next_msgs.as_ref().unwrap().0).unwrap();
2940                                         commitment_signed_dance!($node, $prev_node, next_msgs.as_ref().unwrap().1, !$last_node);
2941                                 }
2942                         }
2943                 }
2944
2945                 let mut expected_next_node = expected_route.last().unwrap().node.get_our_node_id();
2946                 let mut prev_node = expected_route.last().unwrap();
2947                 for (idx, node) in expected_route.iter().rev().enumerate() {
2948                         assert_eq!(expected_next_node, node.node.get_our_node_id());
2949                         if next_msgs.is_some() {
2950                                 // We may be the "last node" for the purpose of the commitment dance if we're
2951                                 // skipping the last node (implying it is disconnected) and we're the
2952                                 // second-to-last node!
2953                                 update_fail_dance!(node, prev_node, skip_last && idx == expected_route.len() - 1);
2954                         }
2955
2956                         let events = node.node.get_and_clear_pending_events();
2957                         if !skip_last || idx != expected_route.len() - 1 {
2958                                 assert_eq!(events.len(), 1);
2959                                 match events[0] {
2960                                         Event::UpdateHTLCs { ref node_id, updates: msgs::CommitmentUpdate { ref update_add_htlcs, ref update_fulfill_htlcs, ref update_fail_htlcs, ref update_fail_malformed_htlcs, ref commitment_signed } } => {
2961                                                 assert!(update_add_htlcs.is_empty());
2962                                                 assert!(update_fulfill_htlcs.is_empty());
2963                                                 assert_eq!(update_fail_htlcs.len(), 1);
2964                                                 assert!(update_fail_malformed_htlcs.is_empty());
2965                                                 expected_next_node = node_id.clone();
2966                                                 next_msgs = Some((update_fail_htlcs[0].clone(), commitment_signed.clone()));
2967                                         },
2968                                         _ => panic!("Unexpected event"),
2969                                 }
2970                         } else {
2971                                 assert!(events.is_empty());
2972                         }
2973                         if !skip_last && idx == expected_route.len() - 1 {
2974                                 assert_eq!(expected_next_node, origin_node.node.get_our_node_id());
2975                         }
2976
2977                         prev_node = node;
2978                 }
2979
2980                 if !skip_last {
2981                         update_fail_dance!(origin_node, expected_route.first().unwrap(), true);
2982
2983                         let events = origin_node.node.get_and_clear_pending_events();
2984                         assert_eq!(events.len(), 1);
2985                         match events[0] {
2986                                 Event::PaymentFailed { payment_hash } => {
2987                                         assert_eq!(payment_hash, our_payment_hash);
2988                                 },
2989                                 _ => panic!("Unexpected event"),
2990                         }
2991                 }
2992         }
2993
2994         fn fail_payment(origin_node: &Node, expected_route: &[&Node], our_payment_hash: [u8; 32]) {
2995                 fail_payment_along_route(origin_node, expected_route, false, our_payment_hash);
2996         }
2997
2998         fn create_network(node_count: usize) -> Vec<Node> {
2999                 let mut nodes = Vec::new();
3000                 let mut rng = thread_rng();
3001                 let secp_ctx = Secp256k1::new();
3002                 let logger: Arc<Logger> = Arc::new(test_utils::TestLogger::new());
3003
3004                 let chan_count = Rc::new(RefCell::new(0));
3005                 let payment_count = Rc::new(RefCell::new(0));
3006
3007                 for _ in 0..node_count {
3008                         let feeest = Arc::new(test_utils::TestFeeEstimator { sat_per_kw: 253 });
3009                         let chain_monitor = Arc::new(chaininterface::ChainWatchInterfaceUtil::new(Network::Testnet, Arc::clone(&logger)));
3010                         let tx_broadcaster = Arc::new(test_utils::TestBroadcaster{txn_broadcasted: Mutex::new(Vec::new())});
3011                         let chan_monitor = Arc::new(test_utils::TestChannelMonitor::new(chain_monitor.clone(), tx_broadcaster.clone()));
3012                         let node_id = {
3013                                 let mut key_slice = [0; 32];
3014                                 rng.fill_bytes(&mut key_slice);
3015                                 SecretKey::from_slice(&secp_ctx, &key_slice).unwrap()
3016                         };
3017                         let node = ChannelManager::new(node_id.clone(), 0, true, Network::Testnet, feeest.clone(), chan_monitor.clone(), chain_monitor.clone(), tx_broadcaster.clone(), Arc::clone(&logger)).unwrap();
3018                         let router = Router::new(PublicKey::from_secret_key(&secp_ctx, &node_id), chain_monitor.clone(), Arc::clone(&logger));
3019                         nodes.push(Node { chain_monitor, tx_broadcaster, chan_monitor, node, router,
3020                                 network_payment_count: payment_count.clone(),
3021                                 network_chan_count: chan_count.clone(),
3022                         });
3023                 }
3024
3025                 nodes
3026         }
3027
3028         #[test]
3029         fn fake_network_test() {
3030                 // Simple test which builds a network of ChannelManagers, connects them to each other, and
3031                 // tests that payments get routed and transactions broadcast in semi-reasonable ways.
3032                 let nodes = create_network(4);
3033
3034                 // Create some initial channels
3035                 let chan_1 = create_announced_chan_between_nodes(&nodes, 0, 1);
3036                 let chan_2 = create_announced_chan_between_nodes(&nodes, 1, 2);
3037                 let chan_3 = create_announced_chan_between_nodes(&nodes, 2, 3);
3038
3039                 // Rebalance the network a bit by relaying one payment through all the channels...
3040                 send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3])[..], 8000000);
3041                 send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3])[..], 8000000);
3042                 send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3])[..], 8000000);
3043                 send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3])[..], 8000000);
3044
3045                 // Send some more payments
3046                 send_payment(&nodes[1], &vec!(&nodes[2], &nodes[3])[..], 1000000);
3047                 send_payment(&nodes[3], &vec!(&nodes[2], &nodes[1], &nodes[0])[..], 1000000);
3048                 send_payment(&nodes[3], &vec!(&nodes[2], &nodes[1])[..], 1000000);
3049
3050                 // Test failure packets
3051                 let payment_hash_1 = route_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3])[..], 1000000).1;
3052                 fail_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3])[..], payment_hash_1);
3053
3054                 // Add a new channel that skips 3
3055                 let chan_4 = create_announced_chan_between_nodes(&nodes, 1, 3);
3056
3057                 send_payment(&nodes[0], &vec!(&nodes[1], &nodes[3])[..], 1000000);
3058                 send_payment(&nodes[2], &vec!(&nodes[3])[..], 1000000);
3059                 send_payment(&nodes[1], &vec!(&nodes[3])[..], 8000000);
3060                 send_payment(&nodes[1], &vec!(&nodes[3])[..], 8000000);
3061                 send_payment(&nodes[1], &vec!(&nodes[3])[..], 8000000);
3062                 send_payment(&nodes[1], &vec!(&nodes[3])[..], 8000000);
3063                 send_payment(&nodes[1], &vec!(&nodes[3])[..], 8000000);
3064
3065                 // Do some rebalance loop payments, simultaneously
3066                 let mut hops = Vec::with_capacity(3);
3067                 hops.push(RouteHop {
3068                         pubkey: nodes[2].node.get_our_node_id(),
3069                         short_channel_id: chan_2.0.contents.short_channel_id,
3070                         fee_msat: 0,
3071                         cltv_expiry_delta: chan_3.0.contents.cltv_expiry_delta as u32
3072                 });
3073                 hops.push(RouteHop {
3074                         pubkey: nodes[3].node.get_our_node_id(),
3075                         short_channel_id: chan_3.0.contents.short_channel_id,
3076                         fee_msat: 0,
3077                         cltv_expiry_delta: chan_4.1.contents.cltv_expiry_delta as u32
3078                 });
3079                 hops.push(RouteHop {
3080                         pubkey: nodes[1].node.get_our_node_id(),
3081                         short_channel_id: chan_4.0.contents.short_channel_id,
3082                         fee_msat: 1000000,
3083                         cltv_expiry_delta: TEST_FINAL_CLTV,
3084                 });
3085                 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;
3086                 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;
3087                 let payment_preimage_1 = send_along_route(&nodes[1], Route { hops }, &vec!(&nodes[2], &nodes[3], &nodes[1])[..], 1000000).0;
3088
3089                 let mut hops = Vec::with_capacity(3);
3090                 hops.push(RouteHop {
3091                         pubkey: nodes[3].node.get_our_node_id(),
3092                         short_channel_id: chan_4.0.contents.short_channel_id,
3093                         fee_msat: 0,
3094                         cltv_expiry_delta: chan_3.1.contents.cltv_expiry_delta as u32
3095                 });
3096                 hops.push(RouteHop {
3097                         pubkey: nodes[2].node.get_our_node_id(),
3098                         short_channel_id: chan_3.0.contents.short_channel_id,
3099                         fee_msat: 0,
3100                         cltv_expiry_delta: chan_2.1.contents.cltv_expiry_delta as u32
3101                 });
3102                 hops.push(RouteHop {
3103                         pubkey: nodes[1].node.get_our_node_id(),
3104                         short_channel_id: chan_2.0.contents.short_channel_id,
3105                         fee_msat: 1000000,
3106                         cltv_expiry_delta: TEST_FINAL_CLTV,
3107                 });
3108                 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;
3109                 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;
3110                 let payment_hash_2 = send_along_route(&nodes[1], Route { hops }, &vec!(&nodes[3], &nodes[2], &nodes[1])[..], 1000000).1;
3111
3112                 // Claim the rebalances...
3113                 fail_payment(&nodes[1], &vec!(&nodes[3], &nodes[2], &nodes[1])[..], payment_hash_2);
3114                 claim_payment(&nodes[1], &vec!(&nodes[2], &nodes[3], &nodes[1])[..], payment_preimage_1);
3115
3116                 // Add a duplicate new channel from 2 to 4
3117                 let chan_5 = create_announced_chan_between_nodes(&nodes, 1, 3);
3118
3119                 // Send some payments across both channels
3120                 let payment_preimage_3 = route_payment(&nodes[0], &vec!(&nodes[1], &nodes[3])[..], 3000000).0;
3121                 let payment_preimage_4 = route_payment(&nodes[0], &vec!(&nodes[1], &nodes[3])[..], 3000000).0;
3122                 let payment_preimage_5 = route_payment(&nodes[0], &vec!(&nodes[1], &nodes[3])[..], 3000000).0;
3123
3124                 route_over_limit(&nodes[0], &vec!(&nodes[1], &nodes[3])[..], 3000000);
3125
3126                 //TODO: Test that routes work again here as we've been notified that the channel is full
3127
3128                 claim_payment(&nodes[0], &vec!(&nodes[1], &nodes[3])[..], payment_preimage_3);
3129                 claim_payment(&nodes[0], &vec!(&nodes[1], &nodes[3])[..], payment_preimage_4);
3130                 claim_payment(&nodes[0], &vec!(&nodes[1], &nodes[3])[..], payment_preimage_5);
3131
3132                 // Close down the channels...
3133                 close_channel(&nodes[0], &nodes[1], &chan_1.2, chan_1.3, true);
3134                 close_channel(&nodes[1], &nodes[2], &chan_2.2, chan_2.3, false);
3135                 close_channel(&nodes[2], &nodes[3], &chan_3.2, chan_3.3, true);
3136                 close_channel(&nodes[1], &nodes[3], &chan_4.2, chan_4.3, false);
3137                 close_channel(&nodes[1], &nodes[3], &chan_5.2, chan_5.3, false);
3138         }
3139
3140         #[test]
3141         fn duplicate_htlc_test() {
3142                 // Test that we accept duplicate payment_hash HTLCs across the network and that
3143                 // claiming/failing them are all separate and don't effect each other
3144                 let mut nodes = create_network(6);
3145
3146                 // Create some initial channels to route via 3 to 4/5 from 0/1/2
3147                 create_announced_chan_between_nodes(&nodes, 0, 3);
3148                 create_announced_chan_between_nodes(&nodes, 1, 3);
3149                 create_announced_chan_between_nodes(&nodes, 2, 3);
3150                 create_announced_chan_between_nodes(&nodes, 3, 4);
3151                 create_announced_chan_between_nodes(&nodes, 3, 5);
3152
3153                 let (payment_preimage, payment_hash) = route_payment(&nodes[0], &vec!(&nodes[3], &nodes[4])[..], 1000000);
3154
3155                 *nodes[0].network_payment_count.borrow_mut() -= 1;
3156                 assert_eq!(route_payment(&nodes[1], &vec!(&nodes[3])[..], 1000000).0, payment_preimage);
3157
3158                 *nodes[0].network_payment_count.borrow_mut() -= 1;
3159                 assert_eq!(route_payment(&nodes[2], &vec!(&nodes[3], &nodes[5])[..], 1000000).0, payment_preimage);
3160
3161                 claim_payment(&nodes[0], &vec!(&nodes[3], &nodes[4])[..], payment_preimage);
3162                 fail_payment(&nodes[2], &vec!(&nodes[3], &nodes[5])[..], payment_hash);
3163                 claim_payment(&nodes[1], &vec!(&nodes[3])[..], payment_preimage);
3164         }
3165
3166         #[derive(PartialEq)]
3167         enum HTLCType { NONE, TIMEOUT, SUCCESS }
3168         /// Tests that the given node has broadcast transactions for the given Channel
3169         ///
3170         /// First checks that the latest local commitment tx has been broadcast, unless an explicit
3171         /// commitment_tx is provided, which may be used to test that a remote commitment tx was
3172         /// broadcast and the revoked outputs were claimed.
3173         ///
3174         /// Next tests that there is (or is not) a transaction that spends the commitment transaction
3175         /// that appears to be the type of HTLC transaction specified in has_htlc_tx.
3176         ///
3177         /// All broadcast transactions must be accounted for in one of the above three types of we'll
3178         /// also fail.
3179         fn test_txn_broadcast(node: &Node, chan: &(msgs::ChannelUpdate, msgs::ChannelUpdate, [u8; 32], Transaction), commitment_tx: Option<Transaction>, has_htlc_tx: HTLCType) -> Vec<Transaction> {
3180                 let mut node_txn = node.tx_broadcaster.txn_broadcasted.lock().unwrap();
3181                 assert!(node_txn.len() >= if commitment_tx.is_some() { 0 } else { 1 } + if has_htlc_tx == HTLCType::NONE { 0 } else { 1 });
3182
3183                 let mut res = Vec::with_capacity(2);
3184                 node_txn.retain(|tx| {
3185                         if tx.input.len() == 1 && tx.input[0].previous_output.txid == chan.3.txid() {
3186                                 let mut funding_tx_map = HashMap::new();
3187                                 funding_tx_map.insert(chan.3.txid(), chan.3.clone());
3188                                 tx.verify(&funding_tx_map).unwrap();
3189                                 if commitment_tx.is_none() {
3190                                         res.push(tx.clone());
3191                                 }
3192                                 false
3193                         } else { true }
3194                 });
3195                 if let Some(explicit_tx) = commitment_tx {
3196                         res.push(explicit_tx.clone());
3197                 }
3198
3199                 assert_eq!(res.len(), 1);
3200
3201                 if has_htlc_tx != HTLCType::NONE {
3202                         node_txn.retain(|tx| {
3203                                 if tx.input.len() == 1 && tx.input[0].previous_output.txid == res[0].txid() {
3204                                         let mut funding_tx_map = HashMap::new();
3205                                         funding_tx_map.insert(res[0].txid(), res[0].clone());
3206                                         tx.verify(&funding_tx_map).unwrap();
3207                                         if has_htlc_tx == HTLCType::TIMEOUT {
3208                                                 assert!(tx.lock_time != 0);
3209                                         } else {
3210                                                 assert!(tx.lock_time == 0);
3211                                         }
3212                                         res.push(tx.clone());
3213                                         false
3214                                 } else { true }
3215                         });
3216                         assert_eq!(res.len(), 2);
3217                 }
3218
3219                 assert!(node_txn.is_empty());
3220                 res
3221         }
3222
3223         /// Tests that the given node has broadcast a claim transaction against the provided revoked
3224         /// HTLC transaction.
3225         fn test_revoked_htlc_claim_txn_broadcast(node: &Node, revoked_tx: Transaction) {
3226                 let mut node_txn = node.tx_broadcaster.txn_broadcasted.lock().unwrap();
3227                 assert_eq!(node_txn.len(), 1);
3228                 node_txn.retain(|tx| {
3229                         if tx.input.len() == 1 && tx.input[0].previous_output.txid == revoked_tx.txid() {
3230                                 let mut funding_tx_map = HashMap::new();
3231                                 funding_tx_map.insert(revoked_tx.txid(), revoked_tx.clone());
3232                                 tx.verify(&funding_tx_map).unwrap();
3233                                 false
3234                         } else { true }
3235                 });
3236                 assert!(node_txn.is_empty());
3237         }
3238
3239         fn check_preimage_claim(node: &Node, prev_txn: &Vec<Transaction>) -> Vec<Transaction> {
3240                 let mut node_txn = node.tx_broadcaster.txn_broadcasted.lock().unwrap();
3241
3242                 assert!(node_txn.len() >= 1);
3243                 assert_eq!(node_txn[0].input.len(), 1);
3244                 let mut found_prev = false;
3245
3246                 for tx in prev_txn {
3247                         if node_txn[0].input[0].previous_output.txid == tx.txid() {
3248                                 let mut funding_tx_map = HashMap::new();
3249                                 funding_tx_map.insert(tx.txid(), tx.clone());
3250                                 node_txn[0].verify(&funding_tx_map).unwrap();
3251
3252                                 assert!(node_txn[0].input[0].witness[2].len() > 106); // must spend an htlc output
3253                                 assert_eq!(tx.input.len(), 1); // must spend a commitment tx
3254
3255                                 found_prev = true;
3256                                 break;
3257                         }
3258                 }
3259                 assert!(found_prev);
3260
3261                 let mut res = Vec::new();
3262                 mem::swap(&mut *node_txn, &mut res);
3263                 res
3264         }
3265
3266         fn get_announce_close_broadcast_events(nodes: &Vec<Node>, a: usize, b: usize) {
3267                 let events_1 = nodes[a].node.get_and_clear_pending_events();
3268                 assert_eq!(events_1.len(), 1);
3269                 let as_update = match events_1[0] {
3270                         Event::BroadcastChannelUpdate { ref msg } => {
3271                                 msg.clone()
3272                         },
3273                         _ => panic!("Unexpected event"),
3274                 };
3275
3276                 let events_2 = nodes[b].node.get_and_clear_pending_events();
3277                 assert_eq!(events_2.len(), 1);
3278                 let bs_update = match events_2[0] {
3279                         Event::BroadcastChannelUpdate { ref msg } => {
3280                                 msg.clone()
3281                         },
3282                         _ => panic!("Unexpected event"),
3283                 };
3284
3285                 for node in nodes {
3286                         node.router.handle_channel_update(&as_update).unwrap();
3287                         node.router.handle_channel_update(&bs_update).unwrap();
3288                 }
3289         }
3290
3291         #[test]
3292         fn channel_monitor_network_test() {
3293                 // Simple test which builds a network of ChannelManagers, connects them to each other, and
3294                 // tests that ChannelMonitor is able to recover from various states.
3295                 let nodes = create_network(5);
3296
3297                 // Create some initial channels
3298                 let chan_1 = create_announced_chan_between_nodes(&nodes, 0, 1);
3299                 let chan_2 = create_announced_chan_between_nodes(&nodes, 1, 2);
3300                 let chan_3 = create_announced_chan_between_nodes(&nodes, 2, 3);
3301                 let chan_4 = create_announced_chan_between_nodes(&nodes, 3, 4);
3302
3303                 // Rebalance the network a bit by relaying one payment through all the channels...
3304                 send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3], &nodes[4])[..], 8000000);
3305                 send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3], &nodes[4])[..], 8000000);
3306                 send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3], &nodes[4])[..], 8000000);
3307                 send_payment(&nodes[0], &vec!(&nodes[1], &nodes[2], &nodes[3], &nodes[4])[..], 8000000);
3308
3309                 // Simple case with no pending HTLCs:
3310                 nodes[1].node.peer_disconnected(&nodes[0].node.get_our_node_id(), true);
3311                 {
3312                         let mut node_txn = test_txn_broadcast(&nodes[1], &chan_1, None, HTLCType::NONE);
3313                         let header = BlockHeader { version: 0x20000000, prev_blockhash: Default::default(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
3314                         nodes[0].chain_monitor.block_connected_with_filtering(&Block { header, txdata: vec![node_txn.drain(..).next().unwrap()] }, 1);
3315                         test_txn_broadcast(&nodes[0], &chan_1, None, HTLCType::NONE);
3316                 }
3317                 get_announce_close_broadcast_events(&nodes, 0, 1);
3318                 assert_eq!(nodes[0].node.list_channels().len(), 0);
3319                 assert_eq!(nodes[1].node.list_channels().len(), 1);
3320
3321                 // One pending HTLC is discarded by the force-close:
3322                 let payment_preimage_1 = route_payment(&nodes[1], &vec!(&nodes[2], &nodes[3])[..], 3000000).0;
3323
3324                 // Simple case of one pending HTLC to HTLC-Timeout
3325                 nodes[1].node.peer_disconnected(&nodes[2].node.get_our_node_id(), true);
3326                 {
3327                         let mut node_txn = test_txn_broadcast(&nodes[1], &chan_2, None, HTLCType::TIMEOUT);
3328                         let header = BlockHeader { version: 0x20000000, prev_blockhash: Default::default(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
3329                         nodes[2].chain_monitor.block_connected_with_filtering(&Block { header, txdata: vec![node_txn.drain(..).next().unwrap()] }, 1);
3330                         test_txn_broadcast(&nodes[2], &chan_2, None, HTLCType::NONE);
3331                 }
3332                 get_announce_close_broadcast_events(&nodes, 1, 2);
3333                 assert_eq!(nodes[1].node.list_channels().len(), 0);
3334                 assert_eq!(nodes[2].node.list_channels().len(), 1);
3335
3336                 macro_rules! claim_funds {
3337                         ($node: expr, $prev_node: expr, $preimage: expr) => {
3338                                 {
3339                                         assert!($node.node.claim_funds($preimage));
3340                                         {
3341                                                 let mut added_monitors = $node.chan_monitor.added_monitors.lock().unwrap();
3342                                                 assert_eq!(added_monitors.len(), 1);
3343                                                 added_monitors.clear();
3344                                         }
3345
3346                                         let events = $node.node.get_and_clear_pending_events();
3347                                         assert_eq!(events.len(), 1);
3348                                         match events[0] {
3349                                                 Event::UpdateHTLCs { ref node_id, updates: msgs::CommitmentUpdate { ref update_add_htlcs, ref update_fail_htlcs, .. } } => {
3350                                                         assert!(update_add_htlcs.is_empty());
3351                                                         assert!(update_fail_htlcs.is_empty());
3352                                                         assert_eq!(*node_id, $prev_node.node.get_our_node_id());
3353                                                 },
3354                                                 _ => panic!("Unexpected event"),
3355                                         };
3356                                 }
3357                         }
3358                 }
3359
3360                 // nodes[3] gets the preimage, but nodes[2] already disconnected, resulting in a nodes[2]
3361                 // HTLC-Timeout and a nodes[3] claim against it (+ its own announces)
3362                 nodes[2].node.peer_disconnected(&nodes[3].node.get_our_node_id(), true);
3363                 {
3364                         let node_txn = test_txn_broadcast(&nodes[2], &chan_3, None, HTLCType::TIMEOUT);
3365
3366                         // Claim the payment on nodes[3], giving it knowledge of the preimage
3367                         claim_funds!(nodes[3], nodes[2], payment_preimage_1);
3368
3369                         let header = BlockHeader { version: 0x20000000, prev_blockhash: Default::default(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
3370                         nodes[3].chain_monitor.block_connected_with_filtering(&Block { header, txdata: vec![node_txn[0].clone()] }, 1);
3371
3372                         check_preimage_claim(&nodes[3], &node_txn);
3373                 }
3374                 get_announce_close_broadcast_events(&nodes, 2, 3);
3375                 assert_eq!(nodes[2].node.list_channels().len(), 0);
3376                 assert_eq!(nodes[3].node.list_channels().len(), 1);
3377
3378                 // One pending HTLC to time out:
3379                 let payment_preimage_2 = route_payment(&nodes[3], &vec!(&nodes[4])[..], 3000000).0;
3380
3381                 {
3382                         let mut header = BlockHeader { version: 0x20000000, prev_blockhash: Default::default(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
3383                         nodes[3].chain_monitor.block_connected_checked(&header, 1, &Vec::new()[..], &[0; 0]);
3384                         for i in 2..TEST_FINAL_CLTV - 3 {
3385                                 header = BlockHeader { version: 0x20000000, prev_blockhash: header.bitcoin_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
3386                                 nodes[3].chain_monitor.block_connected_checked(&header, i, &Vec::new()[..], &[0; 0]);
3387                         }
3388
3389                         let node_txn = test_txn_broadcast(&nodes[3], &chan_4, None, HTLCType::TIMEOUT);
3390
3391                         // Claim the payment on nodes[4], giving it knowledge of the preimage
3392                         claim_funds!(nodes[4], nodes[3], payment_preimage_2);
3393
3394                         header = BlockHeader { version: 0x20000000, prev_blockhash: Default::default(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
3395                         nodes[4].chain_monitor.block_connected_checked(&header, 1, &Vec::new()[..], &[0; 0]);
3396                         for i in 2..TEST_FINAL_CLTV - 3 {
3397                                 header = BlockHeader { version: 0x20000000, prev_blockhash: header.bitcoin_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
3398                                 nodes[4].chain_monitor.block_connected_checked(&header, i, &Vec::new()[..], &[0; 0]);
3399                         }
3400
3401                         test_txn_broadcast(&nodes[4], &chan_4, None, HTLCType::SUCCESS);
3402
3403                         header = BlockHeader { version: 0x20000000, prev_blockhash: header.bitcoin_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
3404                         nodes[4].chain_monitor.block_connected_with_filtering(&Block { header, txdata: vec![node_txn[0].clone()] }, TEST_FINAL_CLTV - 5);
3405
3406                         check_preimage_claim(&nodes[4], &node_txn);
3407                 }
3408                 get_announce_close_broadcast_events(&nodes, 3, 4);
3409                 assert_eq!(nodes[3].node.list_channels().len(), 0);
3410                 assert_eq!(nodes[4].node.list_channels().len(), 0);
3411
3412                 // Create some new channels:
3413                 let chan_5 = create_announced_chan_between_nodes(&nodes, 0, 1);
3414
3415                 // A pending HTLC which will be revoked:
3416                 let payment_preimage_3 = route_payment(&nodes[0], &vec!(&nodes[1])[..], 3000000).0;
3417                 // Get the will-be-revoked local txn from nodes[0]
3418                 let revoked_local_txn = nodes[0].node.channel_state.lock().unwrap().by_id.iter().next().unwrap().1.last_local_commitment_txn.clone();
3419                 // Revoke the old state
3420                 claim_payment(&nodes[0], &vec!(&nodes[1])[..], payment_preimage_3);
3421
3422                 {
3423                         let mut header = BlockHeader { version: 0x20000000, prev_blockhash: Default::default(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
3424                         nodes[1].chain_monitor.block_connected_with_filtering(&Block { header, txdata: vec![revoked_local_txn[0].clone()] }, 1);
3425                         {
3426                                 let mut node_txn = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap();
3427                                 assert_eq!(node_txn.len(), 3);
3428                                 assert_eq!(node_txn.pop().unwrap(), node_txn[0]); // An outpoint registration will result in a 2nd block_connected
3429                                 assert_eq!(node_txn[0].input.len(), 1);
3430
3431                                 let mut funding_tx_map = HashMap::new();
3432                                 funding_tx_map.insert(revoked_local_txn[0].txid(), revoked_local_txn[0].clone());
3433                                 node_txn[0].verify(&funding_tx_map).unwrap();
3434                                 node_txn.swap_remove(0);
3435                         }
3436                         test_txn_broadcast(&nodes[1], &chan_5, None, HTLCType::NONE);
3437
3438                         nodes[0].chain_monitor.block_connected_with_filtering(&Block { header, txdata: vec![revoked_local_txn[0].clone()] }, 1);
3439                         let node_txn = test_txn_broadcast(&nodes[0], &chan_5, Some(revoked_local_txn[0].clone()), HTLCType::TIMEOUT);
3440                         header = BlockHeader { version: 0x20000000, prev_blockhash: header.bitcoin_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
3441                         nodes[1].chain_monitor.block_connected_with_filtering(&Block { header, txdata: vec![node_txn[1].clone()] }, 1);
3442                         test_revoked_htlc_claim_txn_broadcast(&nodes[1], node_txn[1].clone());
3443                 }
3444                 get_announce_close_broadcast_events(&nodes, 0, 1);
3445                 assert_eq!(nodes[0].node.list_channels().len(), 0);
3446                 assert_eq!(nodes[1].node.list_channels().len(), 0);
3447         }
3448
3449         #[test]
3450         fn test_htlc_ignore_latest_remote_commitment() {
3451                 // Test that HTLC transactions spending the latest remote commitment transaction are simply
3452                 // ignored if we cannot claim them. This originally tickled an invalid unwrap().
3453                 let nodes = create_network(2);
3454                 create_announced_chan_between_nodes(&nodes, 0, 1);
3455
3456                 route_payment(&nodes[0], &[&nodes[1]], 10000000);
3457                 nodes[0].node.force_close_channel(&nodes[0].node.list_channels()[0].channel_id);
3458                 {
3459                         let events = nodes[0].node.get_and_clear_pending_events();
3460                         assert_eq!(events.len(), 1);
3461                         match events[0] {
3462                                 Event::BroadcastChannelUpdate { msg: msgs::ChannelUpdate { contents: msgs::UnsignedChannelUpdate { flags, .. }, .. } } => {
3463                                         assert_eq!(flags & 0b10, 0b10);
3464                                 },
3465                                 _ => panic!("Unexpected event"),
3466                         }
3467                 }
3468
3469                 let node_txn = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap();
3470                 assert_eq!(node_txn.len(), 2);
3471
3472                 let header = BlockHeader { version: 0x20000000, prev_blockhash: Default::default(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
3473                 nodes[1].chain_monitor.block_connected_checked(&header, 1, &[&node_txn[0], &node_txn[1]], &[1; 2]);
3474
3475                 {
3476                         let events = nodes[1].node.get_and_clear_pending_events();
3477                         assert_eq!(events.len(), 1);
3478                         match events[0] {
3479                                 Event::BroadcastChannelUpdate { msg: msgs::ChannelUpdate { contents: msgs::UnsignedChannelUpdate { flags, .. }, .. } } => {
3480                                         assert_eq!(flags & 0b10, 0b10);
3481                                 },
3482                                 _ => panic!("Unexpected event"),
3483                         }
3484                 }
3485
3486                 // Duplicate the block_connected call since this may happen due to other listeners
3487                 // registering new transactions
3488                 nodes[1].chain_monitor.block_connected_checked(&header, 1, &[&node_txn[0], &node_txn[1]], &[1; 2]);
3489         }
3490
3491         #[test]
3492         fn test_force_close_fail_back() {
3493                 // Check which HTLCs are failed-backwards on channel force-closure
3494                 let mut nodes = create_network(3);
3495                 create_announced_chan_between_nodes(&nodes, 0, 1);
3496                 create_announced_chan_between_nodes(&nodes, 1, 2);
3497
3498                 let route = nodes[0].router.get_route(&nodes[2].node.get_our_node_id(), None, &Vec::new(), 1000000, 42).unwrap();
3499
3500                 let our_payment_preimage = [*nodes[0].network_payment_count.borrow(); 32];
3501                 *nodes[0].network_payment_count.borrow_mut() += 1;
3502                 let our_payment_hash = {
3503                         let mut sha = Sha256::new();
3504                         sha.input(&our_payment_preimage[..]);
3505                         let mut ret = [0; 32];
3506                         sha.result(&mut ret);
3507                         ret
3508                 };
3509
3510                 let mut payment_event = {
3511                         nodes[0].node.send_payment(route, our_payment_hash).unwrap();
3512                         {
3513                                 let mut added_monitors = nodes[0].chan_monitor.added_monitors.lock().unwrap();
3514                                 assert_eq!(added_monitors.len(), 1);
3515                                 added_monitors.clear();
3516                         }
3517
3518                         let mut events = nodes[0].node.get_and_clear_pending_events();
3519                         assert_eq!(events.len(), 1);
3520                         SendEvent::from_event(events.remove(0))
3521                 };
3522
3523                 nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &payment_event.msgs[0]).unwrap();
3524                 commitment_signed_dance!(nodes[1], nodes[0], payment_event.commitment_msg, false);
3525
3526                 let events_1 = nodes[1].node.get_and_clear_pending_events();
3527                 assert_eq!(events_1.len(), 1);
3528                 match events_1[0] {
3529                         Event::PendingHTLCsForwardable { .. } => { },
3530                         _ => panic!("Unexpected event"),
3531                 };
3532
3533                 nodes[1].node.channel_state.lock().unwrap().next_forward = Instant::now();
3534                 nodes[1].node.process_pending_htlc_forwards();
3535
3536                 let mut events_2 = nodes[1].node.get_and_clear_pending_events();
3537                 assert_eq!(events_2.len(), 1);
3538                 payment_event = SendEvent::from_event(events_2.remove(0));
3539                 assert_eq!(payment_event.msgs.len(), 1);
3540
3541                 {
3542                         let mut added_monitors = nodes[1].chan_monitor.added_monitors.lock().unwrap();
3543                         assert_eq!(added_monitors.len(), 1);
3544                         added_monitors.clear();
3545                 }
3546
3547                 nodes[2].node.handle_update_add_htlc(&nodes[1].node.get_our_node_id(), &payment_event.msgs[0]).unwrap();
3548                 nodes[2].node.handle_commitment_signed(&nodes[1].node.get_our_node_id(), &payment_event.commitment_msg).unwrap();
3549
3550                 {
3551                         let mut added_monitors = nodes[2].chan_monitor.added_monitors.lock().unwrap();
3552                         assert_eq!(added_monitors.len(), 1);
3553                         added_monitors.clear();
3554                 }
3555
3556                 // nodes[2] now has the latest commitment transaction, but hasn't revoked its previous
3557                 // state or updated nodes[1]' state. Now force-close and broadcast that commitment/HTLC
3558                 // transaction and ensure nodes[1] doesn't fail-backwards (this was originally a bug!).
3559
3560                 nodes[2].node.force_close_channel(&payment_event.commitment_msg.channel_id);
3561                 let events_3 = nodes[2].node.get_and_clear_pending_events();
3562                 assert_eq!(events_3.len(), 1);
3563                 match events_3[0] {
3564                         Event::BroadcastChannelUpdate { msg: msgs::ChannelUpdate { contents: msgs::UnsignedChannelUpdate { flags, .. }, .. } } => {
3565                                 assert_eq!(flags & 0b10, 0b10);
3566                         },
3567                         _ => panic!("Unexpected event"),
3568                 }
3569
3570                 let tx = {
3571                         let mut node_txn = nodes[2].tx_broadcaster.txn_broadcasted.lock().unwrap();
3572                         // Note that we don't bother broadcasting the HTLC-Success transaction here as we don't
3573                         // have a use for it unless nodes[2] learns the preimage somehow, the funds will go
3574                         // back to nodes[1] upon timeout otherwise.
3575                         assert_eq!(node_txn.len(), 1);
3576                         node_txn.remove(0)
3577                 };
3578
3579                 let header = BlockHeader { version: 0x20000000, prev_blockhash: Default::default(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
3580                 nodes[1].chain_monitor.block_connected_checked(&header, 1, &[&tx], &[1]);
3581
3582                 let events_4 = nodes[1].node.get_and_clear_pending_events();
3583                 // Note no UpdateHTLCs event here from nodes[1] to nodes[0]!
3584                 assert_eq!(events_4.len(), 1);
3585                 match events_4[0] {
3586                         Event::BroadcastChannelUpdate { msg: msgs::ChannelUpdate { contents: msgs::UnsignedChannelUpdate { flags, .. }, .. } } => {
3587                                 assert_eq!(flags & 0b10, 0b10);
3588                         },
3589                         _ => panic!("Unexpected event"),
3590                 }
3591
3592                 // Now check that if we add the preimage to ChannelMonitor it broadcasts our HTLC-Success..
3593                 {
3594                         let mut monitors = nodes[2].chan_monitor.simple_monitor.monitors.lock().unwrap();
3595                         monitors.get_mut(&OutPoint::new(Sha256dHash::from(&payment_event.commitment_msg.channel_id[..]), 0)).unwrap()
3596                                 .provide_payment_preimage(&our_payment_hash, &our_payment_preimage);
3597                 }
3598                 nodes[2].chain_monitor.block_connected_checked(&header, 1, &[&tx], &[1]);
3599                 let node_txn = nodes[2].tx_broadcaster.txn_broadcasted.lock().unwrap();
3600                 assert_eq!(node_txn.len(), 1);
3601                 assert_eq!(node_txn[0].input.len(), 1);
3602                 assert_eq!(node_txn[0].input[0].previous_output.txid, tx.txid());
3603                 assert_eq!(node_txn[0].lock_time, 0); // Must be an HTLC-Success
3604                 assert_eq!(node_txn[0].input[0].witness.len(), 5); // Must be an HTLC-Success
3605                 let mut funding_tx_map = HashMap::new();
3606                 funding_tx_map.insert(tx.txid(), tx);
3607                 node_txn[0].verify(&funding_tx_map).unwrap();
3608         }
3609
3610         #[test]
3611         fn test_unconf_chan() {
3612                 // After creating a chan between nodes, we disconnect all blocks previously seen to force a channel close on nodes[0] side
3613                 let nodes = create_network(2);
3614                 create_announced_chan_between_nodes(&nodes, 0, 1);
3615
3616                 let channel_state = nodes[0].node.channel_state.lock().unwrap();
3617                 assert_eq!(channel_state.by_id.len(), 1);
3618                 assert_eq!(channel_state.short_to_id.len(), 1);
3619                 mem::drop(channel_state);
3620
3621                 let mut headers = Vec::new();
3622                 let mut header = BlockHeader { version: 0x20000000, prev_blockhash: Default::default(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
3623                 headers.push(header.clone());
3624                 for _i in 2..100 {
3625                         header = BlockHeader { version: 0x20000000, prev_blockhash: header.bitcoin_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
3626                         headers.push(header.clone());
3627                 }
3628                 while !headers.is_empty() {
3629                         nodes[0].node.block_disconnected(&headers.pop().unwrap());
3630                 }
3631                 {
3632                         let events = nodes[0].node.get_and_clear_pending_events();
3633                         assert_eq!(events.len(), 1);
3634                         match events[0] {
3635                                 Event::BroadcastChannelUpdate { msg: msgs::ChannelUpdate { contents: msgs::UnsignedChannelUpdate { flags, .. }, .. } } => {
3636                                         assert_eq!(flags & 0b10, 0b10);
3637                                 },
3638                                 _ => panic!("Unexpected event"),
3639                         }
3640                 }
3641                 let channel_state = nodes[0].node.channel_state.lock().unwrap();
3642                 assert_eq!(channel_state.by_id.len(), 0);
3643                 assert_eq!(channel_state.short_to_id.len(), 0);
3644         }
3645
3646         fn reconnect_nodes(node_a: &Node, node_b: &Node, pre_all_htlcs: bool, pending_htlc_claims: (usize, usize), pending_htlc_fails: (usize, usize)) {
3647                 let reestablish_1 = node_a.node.peer_connected(&node_b.node.get_our_node_id());
3648                 let reestablish_2 = node_b.node.peer_connected(&node_a.node.get_our_node_id());
3649
3650                 let mut resp_1 = Vec::new();
3651                 for msg in reestablish_1 {
3652                         resp_1.push(node_b.node.handle_channel_reestablish(&node_a.node.get_our_node_id(), &msg).unwrap());
3653                 }
3654                 {
3655                         let mut added_monitors = node_b.chan_monitor.added_monitors.lock().unwrap();
3656                         if pending_htlc_claims.0 != 0 || pending_htlc_fails.0 != 0 {
3657                                 assert_eq!(added_monitors.len(), 1);
3658                         } else {
3659                                 assert!(added_monitors.is_empty());
3660                         }
3661                         added_monitors.clear();
3662                 }
3663
3664                 let mut resp_2 = Vec::new();
3665                 for msg in reestablish_2 {
3666                         resp_2.push(node_a.node.handle_channel_reestablish(&node_b.node.get_our_node_id(), &msg).unwrap());
3667                 }
3668                 {
3669                         let mut added_monitors = node_a.chan_monitor.added_monitors.lock().unwrap();
3670                         if pending_htlc_claims.1 != 0 || pending_htlc_fails.1 != 0 {
3671                                 assert_eq!(added_monitors.len(), 1);
3672                         } else {
3673                                 assert!(added_monitors.is_empty());
3674                         }
3675                         added_monitors.clear();
3676                 }
3677
3678                 // We dont yet support both needing updates, as that would require a different commitment dance:
3679                 assert!((pending_htlc_claims.0 == 0 && pending_htlc_fails.0 == 0) || (pending_htlc_claims.1 == 0 && pending_htlc_fails.1 == 0));
3680
3681                 for chan_msgs in resp_1.drain(..) {
3682                         if pre_all_htlcs {
3683                                 let _announcement_sigs_opt = node_a.node.handle_funding_locked(&node_b.node.get_our_node_id(), &chan_msgs.0.unwrap()).unwrap();
3684                                 //TODO: Test announcement_sigs re-sending when we've implemented it
3685                         } else {
3686                                 assert!(chan_msgs.0.is_none());
3687                         }
3688                         assert!(chan_msgs.1.is_none());
3689                         if pending_htlc_claims.0 != 0 || pending_htlc_fails.0 != 0 {
3690                                 let commitment_update = chan_msgs.2.unwrap();
3691                                 assert!(commitment_update.update_add_htlcs.is_empty()); // We can't relay while disconnected
3692                                 assert_eq!(commitment_update.update_fulfill_htlcs.len(), pending_htlc_claims.0);
3693                                 assert_eq!(commitment_update.update_fail_htlcs.len(), pending_htlc_fails.0);
3694                                 assert!(commitment_update.update_fail_malformed_htlcs.is_empty());
3695                                 for update_fulfill in commitment_update.update_fulfill_htlcs {
3696                                         node_a.node.handle_update_fulfill_htlc(&node_b.node.get_our_node_id(), &update_fulfill).unwrap();
3697                                 }
3698                                 for update_fail in commitment_update.update_fail_htlcs {
3699                                         node_a.node.handle_update_fail_htlc(&node_b.node.get_our_node_id(), &update_fail).unwrap();
3700                                 }
3701
3702                                 commitment_signed_dance!(node_a, node_b, commitment_update.commitment_signed, false);
3703                         } else {
3704                                 assert!(chan_msgs.2.is_none());
3705                         }
3706                 }
3707
3708                 for chan_msgs in resp_2.drain(..) {
3709                         if pre_all_htlcs {
3710                                 let _announcement_sigs_opt = node_b.node.handle_funding_locked(&node_a.node.get_our_node_id(), &chan_msgs.0.unwrap()).unwrap();
3711                                 //TODO: Test announcement_sigs re-sending when we've implemented it
3712                         } else {
3713                                 assert!(chan_msgs.0.is_none());
3714                         }
3715                         assert!(chan_msgs.1.is_none());
3716                         if pending_htlc_claims.1 != 0 || pending_htlc_fails.1 != 0 {
3717                                 let commitment_update = chan_msgs.2.unwrap();
3718                                 assert!(commitment_update.update_add_htlcs.is_empty()); // We can't relay while disconnected
3719                                 assert_eq!(commitment_update.update_fulfill_htlcs.len(), pending_htlc_claims.0);
3720                                 assert_eq!(commitment_update.update_fail_htlcs.len(), pending_htlc_fails.0);
3721                                 assert!(commitment_update.update_fail_malformed_htlcs.is_empty());
3722                                 for update_fulfill in commitment_update.update_fulfill_htlcs {
3723                                         node_b.node.handle_update_fulfill_htlc(&node_a.node.get_our_node_id(), &update_fulfill).unwrap();
3724                                 }
3725                                 for update_fail in commitment_update.update_fail_htlcs {
3726                                         node_b.node.handle_update_fail_htlc(&node_a.node.get_our_node_id(), &update_fail).unwrap();
3727                                 }
3728
3729                                 commitment_signed_dance!(node_b, node_a, commitment_update.commitment_signed, false);
3730                         } else {
3731                                 assert!(chan_msgs.2.is_none());
3732                         }
3733                 }
3734         }
3735
3736         #[test]
3737         fn test_simple_peer_disconnect() {
3738                 // Test that we can reconnect when there are no lost messages
3739                 let nodes = create_network(3);
3740                 create_announced_chan_between_nodes(&nodes, 0, 1);
3741                 create_announced_chan_between_nodes(&nodes, 1, 2);
3742
3743                 nodes[0].node.peer_disconnected(&nodes[1].node.get_our_node_id(), false);
3744                 nodes[1].node.peer_disconnected(&nodes[0].node.get_our_node_id(), false);
3745                 reconnect_nodes(&nodes[0], &nodes[1], true, (0, 0), (0, 0));
3746
3747                 let payment_preimage_1 = route_payment(&nodes[0], &vec!(&nodes[1], &nodes[2])[..], 1000000).0;
3748                 let payment_hash_2 = route_payment(&nodes[0], &vec!(&nodes[1], &nodes[2])[..], 1000000).1;
3749                 fail_payment(&nodes[0], &vec!(&nodes[1], &nodes[2]), payment_hash_2);
3750                 claim_payment(&nodes[0], &vec!(&nodes[1], &nodes[2]), payment_preimage_1);
3751
3752                 nodes[0].node.peer_disconnected(&nodes[1].node.get_our_node_id(), false);
3753                 nodes[1].node.peer_disconnected(&nodes[0].node.get_our_node_id(), false);
3754                 reconnect_nodes(&nodes[0], &nodes[1], false, (0, 0), (0, 0));
3755
3756                 let payment_preimage_3 = route_payment(&nodes[0], &vec!(&nodes[1], &nodes[2])[..], 1000000).0;
3757                 let payment_preimage_4 = route_payment(&nodes[0], &vec!(&nodes[1], &nodes[2])[..], 1000000).0;
3758                 let payment_hash_5 = route_payment(&nodes[0], &vec!(&nodes[1], &nodes[2])[..], 1000000).1;
3759                 let payment_hash_6 = route_payment(&nodes[0], &vec!(&nodes[1], &nodes[2])[..], 1000000).1;
3760
3761                 nodes[0].node.peer_disconnected(&nodes[1].node.get_our_node_id(), false);
3762                 nodes[1].node.peer_disconnected(&nodes[0].node.get_our_node_id(), false);
3763
3764                 claim_payment_along_route(&nodes[0], &vec!(&nodes[1], &nodes[2]), true, payment_preimage_3);
3765                 fail_payment_along_route(&nodes[0], &[&nodes[1], &nodes[2]], true, payment_hash_5);
3766
3767                 reconnect_nodes(&nodes[0], &nodes[1], false, (1, 0), (1, 0));
3768                 {
3769                         let events = nodes[0].node.get_and_clear_pending_events();
3770                         assert_eq!(events.len(), 2);
3771                         match events[0] {
3772                                 Event::PaymentSent { payment_preimage } => {
3773                                         assert_eq!(payment_preimage, payment_preimage_3);
3774                                 },
3775                                 _ => panic!("Unexpected event"),
3776                         }
3777                         match events[1] {
3778                                 Event::PaymentFailed { payment_hash } => {
3779                                         assert_eq!(payment_hash, payment_hash_5);
3780                                 },
3781                                 _ => panic!("Unexpected event"),
3782                         }
3783                 }
3784
3785                 claim_payment(&nodes[0], &vec!(&nodes[1], &nodes[2]), payment_preimage_4);
3786                 fail_payment(&nodes[0], &vec!(&nodes[1], &nodes[2]), payment_hash_6);
3787         }
3788
3789         #[test]
3790         fn test_invalid_channel_announcement() {
3791                 //Test BOLT 7 channel_announcement msg requirement for final node, gather data to build customed channel_announcement msgs
3792                 let secp_ctx = Secp256k1::new();
3793                 let nodes = create_network(2);
3794
3795                 let chan_announcement = create_chan_between_nodes(&nodes[0], &nodes[1]);
3796
3797                 let a_channel_lock = nodes[0].node.channel_state.lock().unwrap();
3798                 let b_channel_lock = nodes[1].node.channel_state.lock().unwrap();
3799                 let as_chan = a_channel_lock.by_id.get(&chan_announcement.3).unwrap();
3800                 let bs_chan = b_channel_lock.by_id.get(&chan_announcement.3).unwrap();
3801
3802                 let _ = nodes[0].router.handle_htlc_fail_channel_update(&msgs::HTLCFailChannelUpdate::ChannelClosed { short_channel_id : as_chan.get_short_channel_id().unwrap() } );
3803
3804                 let as_bitcoin_key = PublicKey::from_secret_key(&secp_ctx, &as_chan.get_local_keys().funding_key);
3805                 let bs_bitcoin_key = PublicKey::from_secret_key(&secp_ctx, &bs_chan.get_local_keys().funding_key);
3806
3807                 let as_network_key = nodes[0].node.get_our_node_id();
3808                 let bs_network_key = nodes[1].node.get_our_node_id();
3809
3810                 let were_node_one = as_bitcoin_key.serialize()[..] < bs_bitcoin_key.serialize()[..];
3811
3812                 let mut chan_announcement;
3813
3814                 macro_rules! dummy_unsigned_msg {
3815                         () => {
3816                                 msgs::UnsignedChannelAnnouncement {
3817                                         features: msgs::GlobalFeatures::new(),
3818                                         chain_hash: genesis_block(Network::Testnet).header.bitcoin_hash(),
3819                                         short_channel_id: as_chan.get_short_channel_id().unwrap(),
3820                                         node_id_1: if were_node_one { as_network_key } else { bs_network_key },
3821                                         node_id_2: if were_node_one { bs_network_key } else { as_network_key },
3822                                         bitcoin_key_1: if were_node_one { as_bitcoin_key } else { bs_bitcoin_key },
3823                                         bitcoin_key_2: if were_node_one { bs_bitcoin_key } else { as_bitcoin_key },
3824                                         excess_data: Vec::new(),
3825                                 };
3826                         }
3827                 }
3828
3829                 macro_rules! sign_msg {
3830                         ($unsigned_msg: expr) => {
3831                                 let msghash = Message::from_slice(&Sha256dHash::from_data(&$unsigned_msg.encode()[..])[..]).unwrap();
3832                                 let as_bitcoin_sig = secp_ctx.sign(&msghash, &as_chan.get_local_keys().funding_key);
3833                                 let bs_bitcoin_sig = secp_ctx.sign(&msghash, &bs_chan.get_local_keys().funding_key);
3834                                 let as_node_sig = secp_ctx.sign(&msghash, &nodes[0].node.our_network_key);
3835                                 let bs_node_sig = secp_ctx.sign(&msghash, &nodes[1].node.our_network_key);
3836                                 chan_announcement = msgs::ChannelAnnouncement {
3837                                         node_signature_1 : if were_node_one { as_node_sig } else { bs_node_sig},
3838                                         node_signature_2 : if were_node_one { bs_node_sig } else { as_node_sig},
3839                                         bitcoin_signature_1: if were_node_one { as_bitcoin_sig } else { bs_bitcoin_sig },
3840                                         bitcoin_signature_2 : if were_node_one { bs_bitcoin_sig } else { as_bitcoin_sig },
3841                                         contents: $unsigned_msg
3842                                 }
3843                         }
3844                 }
3845
3846                 let unsigned_msg = dummy_unsigned_msg!();
3847                 sign_msg!(unsigned_msg);
3848                 assert_eq!(nodes[0].router.handle_channel_announcement(&chan_announcement).unwrap(), true);
3849                 let _ = nodes[0].router.handle_htlc_fail_channel_update(&msgs::HTLCFailChannelUpdate::ChannelClosed { short_channel_id : as_chan.get_short_channel_id().unwrap() } );
3850
3851                 // Configured with Network::Testnet
3852                 let mut unsigned_msg = dummy_unsigned_msg!();
3853                 unsigned_msg.chain_hash = genesis_block(Network::Bitcoin).header.bitcoin_hash();
3854                 sign_msg!(unsigned_msg);
3855                 assert!(nodes[0].router.handle_channel_announcement(&chan_announcement).is_err());
3856
3857                 let mut unsigned_msg = dummy_unsigned_msg!();
3858                 unsigned_msg.chain_hash = Sha256dHash::from_data(&[1,2,3,4,5,6,7,8,9]);
3859                 sign_msg!(unsigned_msg);
3860                 assert!(nodes[0].router.handle_channel_announcement(&chan_announcement).is_err());
3861         }
3862 }