X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=blobdiff_plain;f=lightning%2Fsrc%2Fchain%2Fchainmonitor.rs;h=13a0a883140994de21444992134492acedf0377f;hb=cb83cfe366aaa07179cac1079694e9ea5c6cc9c6;hp=179d0edb55fd7942eda7b819d16c57f53989fbd8;hpb=2bd571d2f9b1e4868708eb4b46832d290d497e04;p=rust-lightning diff --git a/lightning/src/chain/chainmonitor.rs b/lightning/src/chain/chainmonitor.rs index 179d0edb..13a0a883 100644 --- a/lightning/src/chain/chainmonitor.rs +++ b/lightning/src/chain/chainmonitor.rs @@ -34,7 +34,8 @@ use bitcoin::blockdata::block::BlockHeader; use chain; use chain::Filter; use chain::chaininterface::{BroadcasterInterface, FeeEstimator}; -use chain::channelmonitor::{ChannelMonitor, ChannelMonitorUpdate, ChannelMonitorUpdateErr, MonitorEvent, MonitorUpdateError}; +use chain::channelmonitor; +use chain::channelmonitor::{ChannelMonitor, ChannelMonitorUpdate, ChannelMonitorUpdateErr, MonitorEvent, Persist}; use chain::transaction::{OutPoint, TransactionData}; use chain::keysinterface::ChannelKeys; use util::logger::Logger; @@ -55,25 +56,28 @@ use std::ops::Deref; /// [`chain::Watch`]: ../trait.Watch.html /// [`ChannelManager`]: ../../ln/channelmanager/struct.ChannelManager.html /// [module-level documentation]: index.html -pub struct ChainMonitor +pub struct ChainMonitor where C::Target: chain::Filter, T::Target: BroadcasterInterface, F::Target: FeeEstimator, L::Target: Logger, + P::Target: channelmonitor::Persist, { /// The monitors pub monitors: Mutex>>, chain_source: Option, broadcaster: T, logger: L, - fee_estimator: F + fee_estimator: F, + persister: P, } -impl ChainMonitor - where C::Target: chain::Filter, - T::Target: BroadcasterInterface, - F::Target: FeeEstimator, - L::Target: Logger, +impl ChainMonitor +where C::Target: chain::Filter, + T::Target: BroadcasterInterface, + F::Target: FeeEstimator, + L::Target: Logger, + P::Target: channelmonitor::Persist, { /// Dispatches to per-channel monitors, which are responsible for updating their on-chain view /// of a channel and reacting accordingly based on transactions in the connected block. See @@ -95,8 +99,8 @@ impl ChainMonit if let Some(ref chain_source) = self.chain_source { for (txid, outputs) in txn_outputs.drain(..) { - for (idx, output) in outputs.iter().enumerate() { - chain_source.register_output(&OutPoint { txid, index: idx as u16 }, &output.script_pubkey); + for (idx, output) in outputs.iter() { + chain_source.register_output(&OutPoint { txid, index: *idx as u16 }, &output.script_pubkey); } } } @@ -124,27 +128,47 @@ impl ChainMonit /// transactions relevant to the watched channels. /// /// [`chain::Filter`]: ../trait.Filter.html - pub fn new(chain_source: Option, broadcaster: T, logger: L, feeest: F) -> Self { + pub fn new(chain_source: Option, broadcaster: T, logger: L, feeest: F, persister: P) -> Self { Self { monitors: Mutex::new(HashMap::new()), chain_source, broadcaster, logger, fee_estimator: feeest, + persister, } } +} + +impl chain::Watch for ChainMonitor +where C::Target: chain::Filter, + T::Target: BroadcasterInterface, + F::Target: FeeEstimator, + L::Target: Logger, + P::Target: channelmonitor::Persist, +{ + type Keys = ChanSigner; /// Adds the monitor that watches the channel referred to by the given outpoint. /// /// Calls back to [`chain::Filter`] with the funding transaction and outputs to watch. /// + /// Note that we persist the given `ChannelMonitor` while holding the `ChainMonitor` + /// monitors lock. + /// /// [`chain::Filter`]: ../trait.Filter.html - fn add_monitor(&self, outpoint: OutPoint, monitor: ChannelMonitor) -> Result<(), MonitorUpdateError> { + fn watch_channel(&self, funding_outpoint: OutPoint, monitor: ChannelMonitor) -> Result<(), ChannelMonitorUpdateErr> { let mut monitors = self.monitors.lock().unwrap(); - let entry = match monitors.entry(outpoint) { - hash_map::Entry::Occupied(_) => return Err(MonitorUpdateError("Channel monitor for given outpoint is already present")), + let entry = match monitors.entry(funding_outpoint) { + hash_map::Entry::Occupied(_) => { + log_error!(self.logger, "Failed to add new channel data: channel monitor for given outpoint is already present"); + return Err(ChannelMonitorUpdateErr::PermanentFailure)}, hash_map::Entry::Vacant(e) => e, }; + if let Err(e) = self.persister.persist_new_channel(funding_outpoint, &monitor) { + log_error!(self.logger, "Failed to persist new channel data"); + return Err(e); + } { let funding_txo = monitor.get_funding_txo(); log_trace!(self.logger, "Got new Channel Monitor for channel {}", log_bytes!(funding_txo.0.to_channel_id()[..])); @@ -152,8 +176,8 @@ impl ChainMonit if let Some(ref chain_source) = self.chain_source { chain_source.register_tx(&funding_txo.0.txid, &funding_txo.1); for (txid, outputs) in monitor.get_outputs_to_watch().iter() { - for (idx, script_pubkey) in outputs.iter().enumerate() { - chain_source.register_output(&OutPoint { txid: *txid, index: idx as u16 }, &script_pubkey); + for (idx, script_pubkey) in outputs.iter() { + chain_source.register_output(&OutPoint { txid: *txid, index: *idx as u16 }, script_pubkey); } } } @@ -162,38 +186,41 @@ impl ChainMonit Ok(()) } - /// Updates the monitor that watches the channel referred to by the given outpoint. - fn update_monitor(&self, outpoint: OutPoint, update: ChannelMonitorUpdate) -> Result<(), MonitorUpdateError> { + /// Note that we persist the given `ChannelMonitor` update while holding the + /// `ChainMonitor` monitors lock. + fn update_channel(&self, funding_txo: OutPoint, update: ChannelMonitorUpdate) -> Result<(), ChannelMonitorUpdateErr> { + // Update the monitor that watches the channel referred to by the given outpoint. let mut monitors = self.monitors.lock().unwrap(); - match monitors.get_mut(&outpoint) { + match monitors.get_mut(&funding_txo) { + None => { + log_error!(self.logger, "Failed to update channel monitor: no such monitor registered"); + + // We should never ever trigger this from within ChannelManager. Technically a + // user could use this object with some proxying in between which makes this + // possible, but in tests and fuzzing, this should be a panic. + #[cfg(any(test, feature = "fuzztarget"))] + panic!("ChannelManager generated a channel update for a channel that was not yet registered!"); + #[cfg(not(any(test, feature = "fuzztarget")))] + Err(ChannelMonitorUpdateErr::PermanentFailure) + }, Some(orig_monitor) => { log_trace!(self.logger, "Updating Channel Monitor for channel {}", log_funding_info!(orig_monitor)); - orig_monitor.update_monitor(update, &self.broadcaster, &self.logger) - }, - None => Err(MonitorUpdateError("No such monitor registered")) - } - } -} - -impl chain::Watch for ChainMonitor - where C::Target: chain::Filter, - T::Target: BroadcasterInterface, - F::Target: FeeEstimator, - L::Target: Logger, -{ - type Keys = ChanSigner; - - fn watch_channel(&self, funding_txo: OutPoint, monitor: ChannelMonitor) -> Result<(), ChannelMonitorUpdateErr> { - match self.add_monitor(funding_txo, monitor) { - Ok(_) => Ok(()), - Err(_) => Err(ChannelMonitorUpdateErr::PermanentFailure), - } - } - - fn update_channel(&self, funding_txo: OutPoint, update: ChannelMonitorUpdate) -> Result<(), ChannelMonitorUpdateErr> { - match self.update_monitor(funding_txo, update) { - Ok(_) => Ok(()), - Err(_) => Err(ChannelMonitorUpdateErr::PermanentFailure), + let update_res = orig_monitor.update_monitor(&update, &self.broadcaster, &self.fee_estimator, &self.logger); + if let Err(e) = &update_res { + log_error!(self.logger, "Failed to update channel monitor: {:?}", e); + } + // Even if updating the monitor returns an error, the monitor's state will + // still be changed. So, persist the updated monitor despite the error. + let persist_res = self.persister.update_persisted_channel(funding_txo, &update, orig_monitor); + if let Err(ref e) = persist_res { + log_error!(self.logger, "Failed to persist channel monitor update: {:?}", e); + } + if update_res.is_err() { + Err(ChannelMonitorUpdateErr::PermanentFailure) + } else { + persist_res + } + } } } @@ -206,11 +233,12 @@ impl events::EventsProvider for ChainMonitor +impl events::EventsProvider for ChainMonitor where C::Target: chain::Filter, T::Target: BroadcasterInterface, F::Target: FeeEstimator, L::Target: Logger, + P::Target: channelmonitor::Persist, { fn get_and_clear_pending_events(&self) -> Vec { let mut pending_events = Vec::new();