Fix serialization rt bug in Channel and test in functional_tests

[rust-lightning] / lightning / src / ln / functional_test_utils.rs

diff --git a/lightning/src/ln/functional_test_utils.rs b/lightning/src/ln/functional_test_utils.rs
index 1ae8ca1e0058cbb59a006017fc30f9aa4bb75849..9acbc7eddbf7fdd0c45a37c37a00b51bcdf56ea2 100644 (file)
--- a/lightning/src/ln/functional_test_utils.rs
+++ b/lightning/src/ln/functional_test_utils.rs
@@ -4,7 +4,8 @@
 use chain::chaininterface;
 use chain::transaction::OutPoint;
 use chain::keysinterface::KeysInterface;
-use ln::channelmanager::{ChannelManager,RAACommitmentOrder, PaymentPreimage, PaymentHash};
+use ln::channelmanager::{ChannelManager, ChannelManagerReadArgs, RAACommitmentOrder, PaymentPreimage, PaymentHash};
+use ln::channelmonitor::{ChannelMonitor, ManyChannelMonitor};
 use ln::router::{Route, Router};
 use ln::features::InitFeatures;
 use ln::msgs;
@@ -16,6 +17,7 @@ use util::events::{Event, EventsProvider, MessageSendEvent, MessageSendEventsPro
 use util::errors::APIError;
 use util::logger::Logger;
 use util::config::UserConfig;
+use util::ser::{ReadableArgs, Writeable};
 
 use bitcoin::util::hash::BitcoinHash;
 use bitcoin::blockdata::block::BlockHeader;
@@ -35,7 +37,7 @@ use std::cell::RefCell;
 use std::rc::Rc;
 use std::sync::{Arc, Mutex};
 use std::mem;
-use std::collections::HashSet;
+use std::collections::{HashSet, HashMap};
 
 pub const CHAN_CONFIRM_DEPTH: u32 = 100;
 pub fn confirm_transaction<'a, 'b: 'a>(notifier: &'a chaininterface::BlockNotifierRef<'b>, chain: &chaininterface::ChainWatchInterfaceUtil, tx: &Transaction, chan_id: u32) {
@@ -89,6 +91,52 @@ impl<'a, 'b> Drop for Node<'a, 'b> {
                        assert!(self.node.get_and_clear_pending_msg_events().is_empty());
                        assert!(self.node.get_and_clear_pending_events().is_empty());
                        assert!(self.chan_monitor.added_monitors.lock().unwrap().is_empty());
+
+                       // Check that if we serialize and then deserialize all our channel monitors we get the
+                       // same set of outputs to watch for on chain as we have now. Note that if we write
+                       // tests that fully close channels and remove the monitors at some point this may break.
+                       let feeest = Arc::new(test_utils::TestFeeEstimator { sat_per_kw: 253 });
+                       let old_monitors = self.chan_monitor.simple_monitor.monitors.lock().unwrap();
+                       let mut deserialized_monitors = Vec::new();
+                       for (_, old_monitor) in old_monitors.iter() {
+                               let mut w = test_utils::TestVecWriter(Vec::new());
+                               old_monitor.write_for_disk(&mut w).unwrap();
+                               let (_, deserialized_monitor) = <(Sha256d, ChannelMonitor<EnforcingChannelKeys>)>::read(
+                                       &mut ::std::io::Cursor::new(&w.0), Arc::clone(&self.logger) as Arc<Logger>).unwrap();
+                               deserialized_monitors.push(deserialized_monitor);
+                       }
+
+                       // Before using all the new monitors to check the watch outpoints, use the full set of
+                       // them to ensure we can write and reload our ChannelManager.
+                       {
+                               let mut channel_monitors = HashMap::new();
+                               for monitor in deserialized_monitors.iter_mut() {
+                                       channel_monitors.insert(monitor.get_funding_txo().unwrap(), monitor);
+                               }
+
+                               let mut w = test_utils::TestVecWriter(Vec::new());
+                               self.node.write(&mut w).unwrap();
+                               <(Sha256d, ChannelManager<EnforcingChannelKeys, &test_utils::TestChannelMonitor>)>::read(&mut ::std::io::Cursor::new(w.0), ChannelManagerReadArgs {
+                                       default_config: UserConfig::default(),
+                                       keys_manager: self.keys_manager.clone(),
+                                       fee_estimator: Arc::new(test_utils::TestFeeEstimator { sat_per_kw: 253 }),
+                                       monitor: self.chan_monitor,
+                                       tx_broadcaster: self.tx_broadcaster.clone(),
+                                       logger: Arc::new(test_utils::TestLogger::new()),
+                                       channel_monitors: &mut channel_monitors,
+                               }).unwrap();
+                       }
+
+                       let chain_watch = Arc::new(chaininterface::ChainWatchInterfaceUtil::new(Network::Testnet, Arc::clone(&self.logger) as Arc<Logger>));
+                       let channel_monitor = test_utils::TestChannelMonitor::new(chain_watch.clone(), self.tx_broadcaster.clone(), self.logger.clone(), feeest);
+                       for deserialized_monitor in deserialized_monitors.drain(..) {
+                               if let Err(_) = channel_monitor.add_update_monitor(deserialized_monitor.get_funding_txo().unwrap(), deserialized_monitor) {
+                                       panic!();
+                               }
+                       }
+                       if *chain_watch != *self.chain_monitor {
+                               panic!();
+                       }
                }
        }
 }