]> git.bitcoin.ninja Git - rust-lightning/blob - lightning/src/util/test_utils.rs
Add support for `opt_shutdown_anysegwit` feature #780
[rust-lightning] / 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 }