_ Git - rust-lightning/blob - lightning/src/util/test_utils.rs

   1 // This file is Copyright its original authors, visible in version control
   2 // history.
   3 //
   4 // This file is licensed under the Apache License, Version 2.0 <LICENSE-APACHE
   5 // or http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   6 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your option.
   7 // You may not use this file except in accordance with one or both of these
   8 // licenses.
   9
  10 use chain;
  11 use chain::chaininterface;
  12 use chain::chaininterface::ConfirmationTarget;
  13 use chain::chainmonitor;
  14 use chain::channelmonitor;
  15 use chain::channelmonitor::MonitorEvent;
  16 use chain::transaction::OutPoint;
  17 use chain::keysinterface;
  18 use ln::features::{ChannelFeatures, InitFeatures};
  19 use ln::msgs;
  20 use ln::msgs::OptionalField;
  21 use util::enforcing_trait_impls::{EnforcingSigner, INITIAL_REVOKED_COMMITMENT_NUMBER};
  22 use util::events;
  23 use util::logger::{Logger, Level, Record};
  24 use util::ser::{Readable, ReadableArgs, Writer, Writeable};
  25
  26 use bitcoin::blockdata::constants::genesis_block;
  27 use bitcoin::blockdata::transaction::{Transaction, TxOut};
  28 use bitcoin::blockdata::script::{Builder, Script};
  29 use bitcoin::blockdata::opcodes;
  30 use bitcoin::network::constants::Network;
  31 use bitcoin::hash_types::{BlockHash, Txid};
  32
  33 use bitcoin::secp256k1::{SecretKey, PublicKey, Secp256k1, Signature};
  34
  35 use regex;
  36
  37 use std::time::Duration;
  38 use std::sync::{Mutex, Arc};
  39 use std::sync::atomic::{AtomicBool, AtomicUsize, Ordering};
  40 use std::{cmp, mem};
  41 use std::collections::{HashMap, HashSet};
  42 use chain::keysinterface::InMemorySigner;
  43
  44 pub struct TestVecWriter(pub Vec<u8>);
  45 impl Writer for TestVecWriter {
  46         fn write_all(&mut self, buf: &[u8]) -> Result<(), ::std::io::Error> {
  47                 self.0.extend_from_slice(buf);
  48                 Ok(())
  49         }
  50         fn size_hint(&mut self, size: usize) {
  51                 self.0.reserve_exact(size);
  52         }
  53 }
  54
  55 pub struct TestFeeEstimator {
  56         pub sat_per_kw: u32,
  57 }
  58 impl chaininterface::FeeEstimator for TestFeeEstimator {
  59         fn get_est_sat_per_1000_weight(&self, _confirmation_target: ConfirmationTarget) -> u32 {
  60                 self.sat_per_kw
  61         }
  62 }
  63
  64 pub struct OnlyReadsKeysInterface {}
  65 impl keysinterface::KeysInterface for OnlyReadsKeysInterface {
  66         type Signer = EnforcingSigner;
  67
  68         fn get_node_secret(&self) -> SecretKey { unreachable!(); }
  69         fn get_destination_script(&self) -> Script { unreachable!(); }
  70         fn get_shutdown_pubkey(&self) -> PublicKey { unreachable!(); }
  71         fn get_channel_signer(&self, _inbound: bool, _channel_value_satoshis: u64) -> EnforcingSigner { unreachable!(); }
  72         fn get_secure_random_bytes(&self) -> [u8; 32] { unreachable!(); }
  73
  74         fn read_chan_signer(&self, reader: &[u8]) -> Result<Self::Signer, msgs::DecodeError> {
  75                 EnforcingSigner::read(&mut std::io::Cursor::new(reader))
  76         }
  77 }
  78
  79 pub struct TestChainMonitor<'a> {
  80         pub added_monitors: Mutex<Vec<(OutPoint, channelmonitor::ChannelMonitor<EnforcingSigner>)>>,
  81         pub latest_monitor_update_id: Mutex<HashMap<[u8; 32], (OutPoint, u64)>>,
  82         pub chain_monitor: chainmonitor::ChainMonitor<EnforcingSigner, &'a TestChainSource, &'a chaininterface::BroadcasterInterface, &'a TestFeeEstimator, &'a TestLogger, &'a channelmonitor::Persist<EnforcingSigner>>,
  83         pub keys_manager: &'a TestKeysInterface,
  84         pub update_ret: Mutex<Option<Result<(), channelmonitor::ChannelMonitorUpdateErr>>>,
  85         // If this is set to Some(), after the next return, we'll always return this until update_ret
  86         // is changed:
  87         pub next_update_ret: Mutex<Option<Result<(), channelmonitor::ChannelMonitorUpdateErr>>>,
  88 }
  89 impl<'a> TestChainMonitor<'a> {
  90         pub fn new(chain_source: Option<&'a TestChainSource>, broadcaster: &'a chaininterface::BroadcasterInterface, logger: &'a TestLogger, fee_estimator: &'a TestFeeEstimator, persister: &'a channelmonitor::Persist<EnforcingSigner>, keys_manager: &'a TestKeysInterface) -> Self {
  91                 Self {
  92                         added_monitors: Mutex::new(Vec::new()),
  93                         latest_monitor_update_id: Mutex::new(HashMap::new()),
  94                         chain_monitor: chainmonitor::ChainMonitor::new(chain_source, broadcaster, logger, fee_estimator, persister),
  95                         keys_manager,
  96                         update_ret: Mutex::new(None),
  97                         next_update_ret: Mutex::new(None),
  98                 }
  99         }
 100 }
 101 impl<'a> chain::Watch<EnforcingSigner> for TestChainMonitor<'a> {
 102         fn watch_channel(&self, funding_txo: OutPoint, monitor: channelmonitor::ChannelMonitor<EnforcingSigner>) -> Result<(), channelmonitor::ChannelMonitorUpdateErr> {
 103                 // At every point where we get a monitor update, we should be able to send a useful monitor
 104                 // to a watchtower and disk...
 105                 let mut w = TestVecWriter(Vec::new());
 106                 monitor.write(&mut w).unwrap();
 107                 let new_monitor = <(BlockHash, channelmonitor::ChannelMonitor<EnforcingSigner>)>::read(
 108                         &mut ::std::io::Cursor::new(&w.0), self.keys_manager).unwrap().1;
 109                 assert!(new_monitor == monitor);
 110                 self.latest_monitor_update_id.lock().unwrap().insert(funding_txo.to_channel_id(), (funding_txo, monitor.get_latest_update_id()));
 111                 self.added_monitors.lock().unwrap().push((funding_txo, monitor));
 112                 let watch_res = self.chain_monitor.watch_channel(funding_txo, new_monitor);
 113
 114                 let ret = self.update_ret.lock().unwrap().clone();
 115                 if let Some(next_ret) = self.next_update_ret.lock().unwrap().take() {
 116                         *self.update_ret.lock().unwrap() = Some(next_ret);
 117                 }
 118                 if ret.is_some() {
 119                         assert!(watch_res.is_ok());
 120                         return ret.unwrap();
 121                 }
 122                 watch_res
 123         }
 124
 125         fn update_channel(&self, funding_txo: OutPoint, update: channelmonitor::ChannelMonitorUpdate) -> Result<(), channelmonitor::ChannelMonitorUpdateErr> {
 126                 // Every monitor update should survive roundtrip
 127                 let mut w = TestVecWriter(Vec::new());
 128                 update.write(&mut w).unwrap();
 129                 assert!(channelmonitor::ChannelMonitorUpdate::read(
 130                                 &mut ::std::io::Cursor::new(&w.0)).unwrap() == update);
 131
 132                 self.latest_monitor_update_id.lock().unwrap().insert(funding_txo.to_channel_id(), (funding_txo, update.update_id));
 133                 let update_res = self.chain_monitor.update_channel(funding_txo, update);
 134                 // At every point where we get a monitor update, we should be able to send a useful monitor
 135                 // to a watchtower and disk...
 136                 let monitors = self.chain_monitor.monitors.lock().unwrap();
 137                 let monitor = monitors.get(&funding_txo).unwrap();
 138                 w.0.clear();
 139                 monitor.write(&mut w).unwrap();
 140                 let new_monitor = <(BlockHash, channelmonitor::ChannelMonitor<EnforcingSigner>)>::read(
 141                         &mut ::std::io::Cursor::new(&w.0), self.keys_manager).unwrap().1;
 142                 assert!(new_monitor == *monitor);
 143                 self.added_monitors.lock().unwrap().push((funding_txo, new_monitor));
 144
 145                 let ret = self.update_ret.lock().unwrap().clone();
 146                 if let Some(next_ret) = self.next_update_ret.lock().unwrap().take() {
 147                         *self.update_ret.lock().unwrap() = Some(next_ret);
 148                 }
 149                 if ret.is_some() {
 150                         assert!(update_res.is_ok());
 151                         return ret.unwrap();
 152                 }
 153                 update_res
 154         }
 155
 156         fn release_pending_monitor_events(&self) -> Vec<MonitorEvent> {
 157                 return self.chain_monitor.release_pending_monitor_events();
 158         }
 159 }
 160
 161 pub struct TestPersister {
 162         pub update_ret: Mutex<Result<(), channelmonitor::ChannelMonitorUpdateErr>>
 163 }
 164 impl TestPersister {
 165         pub fn new() -> Self {
 166                 Self {
 167                         update_ret: Mutex::new(Ok(()))
 168                 }
 169         }
 170
 171         pub fn set_update_ret(&self, ret: Result<(), channelmonitor::ChannelMonitorUpdateErr>) {
 172                 *self.update_ret.lock().unwrap() = ret;
 173         }
 174 }
 175 impl channelmonitor::Persist<EnforcingSigner> for TestPersister {
 176         fn persist_new_channel(&self, _funding_txo: OutPoint, _data: &channelmonitor::ChannelMonitor<EnforcingSigner>) -> Result<(), channelmonitor::ChannelMonitorUpdateErr> {
 177                 self.update_ret.lock().unwrap().clone()
 178         }
 179
 180         fn update_persisted_channel(&self, _funding_txo: OutPoint, _update: &channelmonitor::ChannelMonitorUpdate, _data: &channelmonitor::ChannelMonitor<EnforcingSigner>) -> Result<(), channelmonitor::ChannelMonitorUpdateErr> {
 181                 self.update_ret.lock().unwrap().clone()
 182         }
 183 }
 184
 185 pub struct TestBroadcaster {
 186         pub txn_broadcasted: Mutex<Vec<Transaction>>,
 187 }
 188 impl chaininterface::BroadcasterInterface for TestBroadcaster {
 189         fn broadcast_transaction(&self, tx: &Transaction) {
 190                 self.txn_broadcasted.lock().unwrap().push(tx.clone());
 191         }
 192 }
 193
 194 pub struct TestChannelMessageHandler {
 195         pub pending_events: Mutex<Vec<events::MessageSendEvent>>,
 196 }
 197
 198 impl TestChannelMessageHandler {
 199         pub fn new() -> Self {
 200                 TestChannelMessageHandler {
 201                         pending_events: Mutex::new(Vec::new()),
 202                 }
 203         }
 204 }
 205
 206 impl msgs::ChannelMessageHandler for TestChannelMessageHandler {
 207         fn handle_open_channel(&self, _their_node_id: &PublicKey, _their_features: InitFeatures, _msg: &msgs::OpenChannel) {}
 208         fn handle_accept_channel(&self, _their_node_id: &PublicKey, _their_features: InitFeatures, _msg: &msgs::AcceptChannel) {}
 209         fn handle_funding_created(&self, _their_node_id: &PublicKey, _msg: &msgs::FundingCreated) {}
 210         fn handle_funding_signed(&self, _their_node_id: &PublicKey, _msg: &msgs::FundingSigned) {}
 211         fn handle_funding_locked(&self, _their_node_id: &PublicKey, _msg: &msgs::FundingLocked) {}
 212         fn handle_shutdown(&self, _their_node_id: &PublicKey, _their_features: &InitFeatures, _msg: &msgs::Shutdown) {}
 213         fn handle_closing_signed(&self, _their_node_id: &PublicKey, _msg: &msgs::ClosingSigned) {}
 214         fn handle_update_add_htlc(&self, _their_node_id: &PublicKey, _msg: &msgs::UpdateAddHTLC) {}
 215         fn handle_update_fulfill_htlc(&self, _their_node_id: &PublicKey, _msg: &msgs::UpdateFulfillHTLC) {}
 216         fn handle_update_fail_htlc(&self, _their_node_id: &PublicKey, _msg: &msgs::UpdateFailHTLC) {}
 217         fn handle_update_fail_malformed_htlc(&self, _their_node_id: &PublicKey, _msg: &msgs::UpdateFailMalformedHTLC) {}
 218         fn handle_commitment_signed(&self, _their_node_id: &PublicKey, _msg: &msgs::CommitmentSigned) {}
 219         fn handle_revoke_and_ack(&self, _their_node_id: &PublicKey, _msg: &msgs::RevokeAndACK) {}
 220         fn handle_update_fee(&self, _their_node_id: &PublicKey, _msg: &msgs::UpdateFee) {}
 221         fn handle_announcement_signatures(&self, _their_node_id: &PublicKey, _msg: &msgs::AnnouncementSignatures) {}
 222         fn handle_channel_reestablish(&self, _their_node_id: &PublicKey, _msg: &msgs::ChannelReestablish) {}
 223         fn peer_disconnected(&self, _their_node_id: &PublicKey, _no_connection_possible: bool) {}
 224         fn peer_connected(&self, _their_node_id: &PublicKey, _msg: &msgs::Init) {}
 225         fn handle_error(&self, _their_node_id: &PublicKey, _msg: &msgs::ErrorMessage) {}
 226 }
 227
 228 impl events::MessageSendEventsProvider for TestChannelMessageHandler {
 229         fn get_and_clear_pending_msg_events(&self) -> Vec<events::MessageSendEvent> {
 230                 let mut pending_events = self.pending_events.lock().unwrap();
 231                 let mut ret = Vec::new();
 232                 mem::swap(&mut ret, &mut *pending_events);
 233                 ret
 234         }
 235 }
 236
 237 fn get_dummy_channel_announcement(short_chan_id: u64) -> msgs::ChannelAnnouncement {
 238         use bitcoin::secp256k1::ffi::Signature as FFISignature;
 239         let secp_ctx = Secp256k1::new();
 240         let network = Network::Testnet;
 241         let node_1_privkey = SecretKey::from_slice(&[42; 32]).unwrap();
 242         let node_2_privkey = SecretKey::from_slice(&[41; 32]).unwrap();
 243         let node_1_btckey = SecretKey::from_slice(&[40; 32]).unwrap();
 244         let node_2_btckey = SecretKey::from_slice(&[39; 32]).unwrap();
 245         let unsigned_ann = msgs::UnsignedChannelAnnouncement {
 246                 features: ChannelFeatures::known(),
 247                 chain_hash: genesis_block(network).header.block_hash(),
 248                 short_channel_id: short_chan_id,
 249                 node_id_1: PublicKey::from_secret_key(&secp_ctx, &node_1_privkey),
 250                 node_id_2: PublicKey::from_secret_key(&secp_ctx, &node_2_privkey),
 251                 bitcoin_key_1: PublicKey::from_secret_key(&secp_ctx, &node_1_btckey),
 252                 bitcoin_key_2: PublicKey::from_secret_key(&secp_ctx, &node_2_btckey),
 253                 excess_data: Vec::new(),
 254         };
 255
 256         msgs::ChannelAnnouncement {
 257                 node_signature_1: Signature::from(FFISignature::new()),
 258                 node_signature_2: Signature::from(FFISignature::new()),
 259                 bitcoin_signature_1: Signature::from(FFISignature::new()),
 260                 bitcoin_signature_2: Signature::from(FFISignature::new()),
 261                 contents: unsigned_ann,
 262         }
 263 }
 264
 265 fn get_dummy_channel_update(short_chan_id: u64) -> msgs::ChannelUpdate {
 266         use bitcoin::secp256k1::ffi::Signature as FFISignature;
 267         let network = Network::Testnet;
 268         msgs::ChannelUpdate {
 269                 signature: Signature::from(FFISignature::new()),
 270                 contents: msgs::UnsignedChannelUpdate {
 271                         chain_hash: genesis_block(network).header.block_hash(),
 272                         short_channel_id: short_chan_id,
 273                         timestamp: 0,
 274                         flags: 0,
 275                         cltv_expiry_delta: 0,
 276                         htlc_minimum_msat: 0,
 277                         htlc_maximum_msat: OptionalField::Absent,
 278                         fee_base_msat: 0,
 279                         fee_proportional_millionths: 0,
 280                         excess_data: vec![],
 281                 }
 282         }
 283 }
 284
 285 pub struct TestRoutingMessageHandler {
 286         pub chan_upds_recvd: AtomicUsize,
 287         pub chan_anns_recvd: AtomicUsize,
 288         pub chan_anns_sent: AtomicUsize,
 289         pub request_full_sync: AtomicBool,
 290 }
 291
 292 impl TestRoutingMessageHandler {
 293         pub fn new() -> Self {
 294                 TestRoutingMessageHandler {
 295                         chan_upds_recvd: AtomicUsize::new(0),
 296                         chan_anns_recvd: AtomicUsize::new(0),
 297                         chan_anns_sent: AtomicUsize::new(0),
 298                         request_full_sync: AtomicBool::new(false),
 299                 }
 300         }
 301 }
 302 impl msgs::RoutingMessageHandler for TestRoutingMessageHandler {
 303         fn handle_node_announcement(&self, _msg: &msgs::NodeAnnouncement) -> Result<bool, msgs::LightningError> {
 304                 Err(msgs::LightningError { err: "".to_owned(), action: msgs::ErrorAction::IgnoreError })
 305         }
 306         fn handle_channel_announcement(&self, _msg: &msgs::ChannelAnnouncement) -> Result<bool, msgs::LightningError> {
 307                 self.chan_anns_recvd.fetch_add(1, Ordering::AcqRel);
 308                 Err(msgs::LightningError { err: "".to_owned(), action: msgs::ErrorAction::IgnoreError })
 309         }
 310         fn handle_channel_update(&self, _msg: &msgs::ChannelUpdate) -> Result<bool, msgs::LightningError> {
 311                 self.chan_upds_recvd.fetch_add(1, Ordering::AcqRel);
 312                 Err(msgs::LightningError { err: "".to_owned(), action: msgs::ErrorAction::IgnoreError })
 313         }
 314         fn handle_htlc_fail_channel_update(&self, _update: &msgs::HTLCFailChannelUpdate) {}
 315         fn get_next_channel_announcements(&self, starting_point: u64, batch_amount: u8) -> Vec<(msgs::ChannelAnnouncement, Option<msgs::ChannelUpdate>, Option<msgs::ChannelUpdate>)> {
 316                 let mut chan_anns = Vec::new();
 317                 const TOTAL_UPDS: u64 = 100;
 318                 let end: u64 = cmp::min(starting_point + batch_amount as u64, TOTAL_UPDS - self.chan_anns_sent.load(Ordering::Acquire) as u64);
 319                 for i in starting_point..end {
 320                         let chan_upd_1 = get_dummy_channel_update(i);
 321                         let chan_upd_2 = get_dummy_channel_update(i);
 322                         let chan_ann = get_dummy_channel_announcement(i);
 323
 324                         chan_anns.push((chan_ann, Some(chan_upd_1), Some(chan_upd_2)));
 325                 }
 326
 327                 self.chan_anns_sent.fetch_add(chan_anns.len(), Ordering::AcqRel);
 328                 chan_anns
 329         }
 330
 331         fn get_next_node_announcements(&self, _starting_point: Option<&PublicKey>, _batch_amount: u8) -> Vec<msgs::NodeAnnouncement> {
 332                 Vec::new()
 333         }
 334
 335         fn sync_routing_table(&self, _their_node_id: &PublicKey, _init_msg: &msgs::Init) {}
 336
 337         fn handle_reply_channel_range(&self, _their_node_id: &PublicKey, _msg: msgs::ReplyChannelRange) -> Result<(), msgs::LightningError> {
 338                 Ok(())
 339         }
 340
 341         fn handle_reply_short_channel_ids_end(&self, _their_node_id: &PublicKey, _msg: msgs::ReplyShortChannelIdsEnd) -> Result<(), msgs::LightningError> {
 342                 Ok(())
 343         }
 344
 345         fn handle_query_channel_range(&self, _their_node_id: &PublicKey, _msg: msgs::QueryChannelRange) -> Result<(), msgs::LightningError> {
 346                 Ok(())
 347         }
 348
 349         fn handle_query_short_channel_ids(&self, _their_node_id: &PublicKey, _msg: msgs::QueryShortChannelIds) -> Result<(), msgs::LightningError> {
 350                 Ok(())
 351         }
 352 }
 353
 354 impl events::MessageSendEventsProvider for TestRoutingMessageHandler {
 355         fn get_and_clear_pending_msg_events(&self) -> Vec<events::MessageSendEvent> {
 356                 vec![]
 357         }
 358 }
 359
 360 pub struct TestLogger {
 361         level: Level,
 362         id: String,
 363         pub lines: Mutex<HashMap<(String, String), usize>>,
 364 }
 365
 366 impl TestLogger {
 367         pub fn new() -> TestLogger {
 368                 Self::with_id("".to_owned())
 369         }
 370         pub fn with_id(id: String) -> TestLogger {
 371                 TestLogger {
 372                         level: Level::Trace,
 373                         id,
 374                         lines: Mutex::new(HashMap::new())
 375                 }
 376         }
 377         pub fn enable(&mut self, level: Level) {
 378                 self.level = level;
 379         }
 380         pub fn assert_log(&self, module: String, line: String, count: usize) {
 381                 let log_entries = self.lines.lock().unwrap();
 382                 assert_eq!(log_entries.get(&(module, line)), Some(&count));
 383         }
 384
 385         /// Search for the number of occurrence of the logged lines which
 386         /// 1. belongs to the specified module and
 387         /// 2. contains `line` in it.
 388         /// And asserts if the number of occurrences is the same with the given `count`
 389         pub fn assert_log_contains(&self, module: String, line: String, count: usize) {
 390                 let log_entries = self.lines.lock().unwrap();
 391                 let l: usize = log_entries.iter().filter(|&(&(ref m, ref l), _c)| {
 392                         m == &module && l.contains(line.as_str())
 393                 }).map(|(_, c) | { c }).sum();
 394                 assert_eq!(l, count)
 395         }
 396
 397     /// Search for the number of occurrences of logged lines which
 398     /// 1. belong to the specified module and
 399     /// 2. match the given regex pattern.
 400     /// Assert that the number of occurrences equals the given `count`
 401         pub fn assert_log_regex(&self, module: String, pattern: regex::Regex, count: usize) {
 402                 let log_entries = self.lines.lock().unwrap();
 403                 let l: usize = log_entries.iter().filter(|&(&(ref m, ref l), _c)| {
 404                         m == &module && pattern.is_match(&l)
 405                 }).map(|(_, c) | { c }).sum();
 406                 assert_eq!(l, count)
 407         }
 408 }
 409
 410 impl Logger for TestLogger {
 411         fn log(&self, record: &Record) {
 412                 *self.lines.lock().unwrap().entry((record.module_path.to_string(), format!("{}", record.args))).or_insert(0) += 1;
 413                 if self.level >= record.level {
 414                         println!("{:<5} {} [{} : {}, {}] {}", record.level.to_string(), self.id, record.module_path, record.file, record.line, record.args);
 415                 }
 416         }
 417 }
 418
 419 pub struct TestKeysInterface {
 420         pub backing: keysinterface::KeysManager,
 421         pub override_session_priv: Mutex<Option<[u8; 32]>>,
 422         pub override_channel_id_priv: Mutex<Option<[u8; 32]>>,
 423         pub disable_revocation_policy_check: bool,
 424         revoked_commitments: Mutex<HashMap<[u8;32], Arc<Mutex<u64>>>>,
 425 }
 426
 427 impl keysinterface::KeysInterface for TestKeysInterface {
 428         type Signer = EnforcingSigner;
 429
 430         fn get_node_secret(&self) -> SecretKey { self.backing.get_node_secret() }
 431         fn get_destination_script(&self) -> Script { self.backing.get_destination_script() }
 432         fn get_shutdown_pubkey(&self) -> PublicKey { self.backing.get_shutdown_pubkey() }
 433         fn get_channel_signer(&self, inbound: bool, channel_value_satoshis: u64) -> EnforcingSigner {
 434                 let keys = self.backing.get_channel_signer(inbound, channel_value_satoshis);
 435                 let revoked_commitment = self.make_revoked_commitment_cell(keys.commitment_seed);
 436                 EnforcingSigner::new_with_revoked(keys, revoked_commitment, self.disable_revocation_policy_check)
 437         }
 438
 439         fn get_secure_random_bytes(&self) -> [u8; 32] {
 440                 let override_channel_id = self.override_channel_id_priv.lock().unwrap();
 441                 let override_session_key = self.override_session_priv.lock().unwrap();
 442                 if override_channel_id.is_some() && override_session_key.is_some() {
 443                         panic!("We don't know which override key to use!");
 444                 }
 445                 if let Some(key) = &*override_channel_id {
 446                         return *key;
 447                 }
 448                 if let Some(key) = &*override_session_key {
 449                         return *key;
 450                 }
 451                 self.backing.get_secure_random_bytes()
 452         }
 453
 454         fn read_chan_signer(&self, buffer: &[u8]) -> Result<Self::Signer, msgs::DecodeError> {
 455                 let mut reader = std::io::Cursor::new(buffer);
 456
 457                 let inner: InMemorySigner = Readable::read(&mut reader)?;
 458                 let revoked_commitment = self.make_revoked_commitment_cell(inner.commitment_seed);
 459
 460                 let last_commitment_number = Readable::read(&mut reader)?;
 461
 462                 Ok(EnforcingSigner {
 463                         inner,
 464                         last_commitment_number: Arc::new(Mutex::new(last_commitment_number)),
 465                         revoked_commitment,
 466                         disable_revocation_policy_check: self.disable_revocation_policy_check,
 467                 })
 468         }
 469 }
 470
 471
 472 impl TestKeysInterface {
 473         pub fn new(seed: &[u8; 32], network: Network) -> Self {
 474                 let now = Duration::from_secs(genesis_block(network).header.time as u64);
 475                 Self {
 476                         backing: keysinterface::KeysManager::new(seed, now.as_secs(), now.subsec_nanos()),
 477                         override_session_priv: Mutex::new(None),
 478                         override_channel_id_priv: Mutex::new(None),
 479                         disable_revocation_policy_check: false,
 480                         revoked_commitments: Mutex::new(HashMap::new()),
 481                 }
 482         }
 483         pub fn derive_channel_keys(&self, channel_value_satoshis: u64, id: &[u8; 32]) -> EnforcingSigner {
 484                 let keys = self.backing.derive_channel_keys(channel_value_satoshis, id);
 485                 let revoked_commitment = self.make_revoked_commitment_cell(keys.commitment_seed);
 486                 EnforcingSigner::new_with_revoked(keys, revoked_commitment, self.disable_revocation_policy_check)
 487         }
 488
 489         fn make_revoked_commitment_cell(&self, commitment_seed: [u8; 32]) -> Arc<Mutex<u64>> {
 490                 let mut revoked_commitments = self.revoked_commitments.lock().unwrap();
 491                 if !revoked_commitments.contains_key(&commitment_seed) {
 492                         revoked_commitments.insert(commitment_seed, Arc::new(Mutex::new(INITIAL_REVOKED_COMMITMENT_NUMBER)));
 493                 }
 494                 let cell = revoked_commitments.get(&commitment_seed).unwrap();
 495                 Arc::clone(cell)
 496         }
 497 }
 498
 499 pub struct TestChainSource {
 500         pub genesis_hash: BlockHash,
 501         pub utxo_ret: Mutex<Result<TxOut, chain::AccessError>>,
 502         pub watched_txn: Mutex<HashSet<(Txid, Script)>>,
 503         pub watched_outputs: Mutex<HashSet<(OutPoint, Script)>>,
 504 }
 505
 506 impl TestChainSource {
 507         pub fn new(network: Network) -> Self {
 508                 let script_pubkey = Builder::new().push_opcode(opcodes::OP_TRUE).into_script();
 509                 Self {
 510                         genesis_hash: genesis_block(network).block_hash(),
 511                         utxo_ret: Mutex::new(Ok(TxOut { value: u64::max_value(), script_pubkey })),
 512                         watched_txn: Mutex::new(HashSet::new()),
 513                         watched_outputs: Mutex::new(HashSet::new()),
 514                 }
 515         }
 516 }
 517
 518 impl chain::Access for TestChainSource {
 519         fn get_utxo(&self, genesis_hash: &BlockHash, _short_channel_id: u64) -> Result<TxOut, chain::AccessError> {
 520                 if self.genesis_hash != *genesis_hash {
 521                         return Err(chain::AccessError::UnknownChain);
 522                 }
 523
 524                 self.utxo_ret.lock().unwrap().clone()
 525         }
 526 }
 527
 528 impl chain::Filter for TestChainSource {
 529         fn register_tx(&self, txid: &Txid, script_pubkey: &Script) {
 530                 self.watched_txn.lock().unwrap().insert((*txid, script_pubkey.clone()));
 531         }
 532
 533         fn register_output(&self, outpoint: &OutPoint, script_pubkey: &Script) {
 534                 self.watched_outputs.lock().unwrap().insert((*outpoint, script_pubkey.clone()));
 535         }
 536 }