From: Matt Corallo Date: Tue, 11 Dec 2018 03:47:21 +0000 (-0500) Subject: Move monitor-generated HTLC event handling to manager event-getters X-Git-Tag: v0.0.12~256^2~10 X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=commitdiff_plain;h=221bfa6bd427ca34c052899a54e945c3a8903b02;p=rust-lightning Move monitor-generated HTLC event handling to manager event-getters This is somewhat awkward, but prevents a slew of duplicate events. Really this should probably be more explicit, but would be easy to move that along with a slew of block_connected-event-processing refactors, see-also GH #80. This affects full_stack_target only on accident cause the demo test didn't continue onwards with another block connection. --- diff --git a/fuzz/fuzz_targets/full_stack_target.rs b/fuzz/fuzz_targets/full_stack_target.rs index 0524f578e..0e73a69f8 100644 --- a/fuzz/fuzz_targets/full_stack_target.rs +++ b/fuzz/fuzz_targets/full_stack_target.rs @@ -833,6 +833,7 @@ mod tests { // 00fd - A feerate request (returning min feerate, which our open_channel also uses) // 0c005e - connect a block with one transaction of len 94 // 0200000001ec00000000000000000000000000000000000000000000000000000000000000000000000000000000014f00000000000000220020f60000000000000000000000000000000000000000000000000000000000000000000000 - the funding transaction + // - client now fails the HTLC backwards as it was unable to extract the payment preimage (CHECK 9 duplicate) let logger = Arc::new(TrackingLogger { lines: Mutex::new(HashMap::new()) }); super::do_test(&::hex::decode("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&(Arc::clone(&logger) as Arc)); @@ -846,6 +847,6 @@ mod tests { assert_eq!(log_entries.get(&("lightning::ln::peer_handler".to_string(), "Handling UpdateHTLCs event in peer_handler for node 030000000000000000000000000000000000000000000000000000000000000000 with 0 adds, 0 fulfills, 0 fails for channel 3d00000000000000000000000000000000000000000000000000000000000000".to_string())), Some(&3)); // 6 assert_eq!(log_entries.get(&("lightning::ln::peer_handler".to_string(), "Handling UpdateHTLCs event in peer_handler for node 030200000000000000000000000000000000000000000000000000000000000000 with 1 adds, 0 fulfills, 0 fails for channel 3f00000000000000000000000000000000000000000000000000000000000000".to_string())), Some(&3)); // 7 assert_eq!(log_entries.get(&("lightning::ln::peer_handler".to_string(), "Handling UpdateHTLCs event in peer_handler for node 030000000000000000000000000000000000000000000000000000000000000000 with 0 adds, 1 fulfills, 0 fails for channel 3d00000000000000000000000000000000000000000000000000000000000000".to_string())), Some(&1)); // 8 - assert_eq!(log_entries.get(&("lightning::ln::peer_handler".to_string(), "Handling UpdateHTLCs event in peer_handler for node 030000000000000000000000000000000000000000000000000000000000000000 with 0 adds, 0 fulfills, 1 fails for channel 3d00000000000000000000000000000000000000000000000000000000000000".to_string())), Some(&1)); // 9 + assert_eq!(log_entries.get(&("lightning::ln::peer_handler".to_string(), "Handling UpdateHTLCs event in peer_handler for node 030000000000000000000000000000000000000000000000000000000000000000 with 0 adds, 0 fulfills, 1 fails for channel 3d00000000000000000000000000000000000000000000000000000000000000".to_string())), Some(&2)); // 9 } } diff --git a/src/ln/channelmanager.rs b/src/ln/channelmanager.rs index c2082f6ee..7d6ef794b 100644 --- a/src/ln/channelmanager.rs +++ b/src/ln/channelmanager.rs @@ -2622,6 +2622,20 @@ impl ChannelManager { impl events::MessageSendEventsProvider for ChannelManager { fn get_and_clear_pending_msg_events(&self) -> Vec { + // TODO: Event release to users and serialization is currently race-y: its very easy for a + // user to serialize a ChannelManager with pending events in it and lose those events on + // restart. This is doubly true for the fail/fulfill-backs from monitor events! + { + //TODO: This behavior should be documented. + for htlc_update in self.monitor.fetch_pending_htlc_updated() { + if let Some(preimage) = htlc_update.payment_preimage { + self.claim_funds_internal(self.channel_state.lock().unwrap(), htlc_update.source, preimage); + } else { + self.fail_htlc_backwards_internal(self.channel_state.lock().unwrap(), htlc_update.source, &htlc_update.payment_hash, HTLCFailReason::Reason { failure_code: 0x4000 | 10, data: Vec::new() }); + } + } + } + let mut ret = Vec::new(); let mut channel_state = self.channel_state.lock().unwrap(); mem::swap(&mut ret, &mut channel_state.pending_msg_events); @@ -2631,6 +2645,20 @@ impl events::MessageSendEventsProvider for ChannelManager { impl events::EventsProvider for ChannelManager { fn get_and_clear_pending_events(&self) -> Vec { + // TODO: Event release to users and serialization is currently race-y: its very easy for a + // user to serialize a ChannelManager with pending events in it and lose those events on + // restart. This is doubly true for the fail/fulfill-backs from monitor events! + { + //TODO: This behavior should be documented. + for htlc_update in self.monitor.fetch_pending_htlc_updated() { + if let Some(preimage) = htlc_update.payment_preimage { + self.claim_funds_internal(self.channel_state.lock().unwrap(), htlc_update.source, preimage); + } else { + self.fail_htlc_backwards_internal(self.channel_state.lock().unwrap(), htlc_update.source, &htlc_update.payment_hash, HTLCFailReason::Reason { failure_code: 0x4000 | 10, data: Vec::new() }); + } + } + } + let mut ret = Vec::new(); let mut pending_events = self.pending_events.lock().unwrap(); mem::swap(&mut ret, &mut *pending_events); @@ -2711,15 +2739,6 @@ impl ChainListener for ChannelManager { for failure in failed_channels.drain(..) { self.finish_force_close_channel(failure); } - { - for htlc_update in self.monitor.fetch_pending_htlc_updated() { - if let Some(preimage) = htlc_update.payment_preimage { - self.claim_funds_internal(self.channel_state.lock().unwrap(), htlc_update.source, preimage); - } else { - self.fail_htlc_backwards_internal(self.channel_state.lock().unwrap(), htlc_update.source, &htlc_update.payment_hash, HTLCFailReason::Reason { failure_code: 0x4000 | 10, data: Vec::new() }); - } - } - } self.latest_block_height.store(height as usize, Ordering::Release); *self.last_block_hash.try_lock().expect("block_(dis)connected must not be called in parallel") = header.bitcoin_hash(); }