X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=blobdiff_plain;f=lightning-persister%2Fsrc%2Flib.rs;h=b277c30ca8cfc9024a6de613f5ad7fea4b7d65c1;hb=b50f59d0e5f38719eeef5d8aa7040aeb385e26ab;hp=368945d1cfb489db52752a1e4ec6b4afedb0497d;hpb=dba0709b084cd3c1f50f95afed5111e5f8afda39;p=rust-lightning diff --git a/lightning-persister/src/lib.rs b/lightning-persister/src/lib.rs index 368945d1..b277c30c 100644 --- a/lightning-persister/src/lib.rs +++ b/lightning-persister/src/lib.rs @@ -1,10 +1,15 @@ //! Utilities that handle persisting Rust-Lightning data to disk via standard filesystem APIs. +// Prefix these with `rustdoc::` when we update our MSRV to be >= 1.52 to remove warnings. #![deny(broken_intra_doc_links)] +#![deny(private_intra_doc_links)] + #![deny(missing_docs)] -#![cfg_attr(all(test, feature = "unstable"), feature(test))] -#[cfg(all(test, feature = "unstable"))] extern crate test; +#![cfg_attr(docsrs, feature(doc_auto_cfg))] + +#![cfg_attr(all(test, feature = "_bench_unstable"), feature(test))] +#[cfg(all(test, feature = "_bench_unstable"))] extern crate test; mod util; @@ -12,24 +17,16 @@ extern crate lightning; extern crate bitcoin; extern crate libc; -use bitcoin::{BlockHash, Txid}; -use bitcoin::hashes::hex::{FromHex, ToHex}; -use crate::util::DiskWriteable; -use lightning::chain; -use lightning::chain::chaininterface::{BroadcasterInterface, FeeEstimator}; -use lightning::chain::channelmonitor::{ChannelMonitor, ChannelMonitorUpdate, ChannelMonitorUpdateErr}; -use lightning::chain::channelmonitor; +use bitcoin::hash_types::{BlockHash, Txid}; +use bitcoin::hashes::hex::FromHex; +use lightning::chain::channelmonitor::ChannelMonitor; use lightning::chain::keysinterface::{Sign, KeysInterface}; -use lightning::chain::transaction::OutPoint; -use lightning::ln::channelmanager::ChannelManager; -use lightning::util::logger::Logger; use lightning::util::ser::{ReadableArgs, Writeable}; -use std::collections::HashMap; +use lightning::util::persist::KVStorePersister; use std::fs; -use std::io::{Cursor, Error}; +use std::io::Cursor; use std::ops::Deref; use std::path::{Path, PathBuf}; -use std::sync::Arc; /// FilesystemPersister persists channel data on disk, where each channel's /// data is stored in a file named after its funding outpoint. @@ -47,24 +44,6 @@ pub struct FilesystemPersister { path_to_channel_data: String, } -impl DiskWriteable for ChannelMonitor { - fn write_to_file(&self, writer: &mut fs::File) -> Result<(), Error> { - self.write(writer) - } -} - -impl DiskWriteable for ChannelManager, Arc, Arc, Arc, Arc> -where M: chain::Watch, - T: BroadcasterInterface, - K: KeysInterface, - F: FeeEstimator, - L: Logger, -{ - fn write_to_file(&self, writer: &mut fs::File) -> Result<(), std::io::Error> { - self.write(writer) - } -} - impl FilesystemPersister { /// Initialize a new FilesystemPersister and set the path to the individual channels' /// files. @@ -79,40 +58,18 @@ impl FilesystemPersister { self.path_to_channel_data.clone() } - pub(crate) fn path_to_monitor_data(&self) -> PathBuf { - let mut path = PathBuf::from(self.path_to_channel_data.clone()); - path.push("monitors"); - path - } - - /// Writes the provided `ChannelManager` to the path provided at `FilesystemPersister` - /// initialization, within a file called "manager". - pub fn persist_manager( - data_dir: String, - manager: &ChannelManager, Arc, Arc, Arc, Arc> - ) -> Result<(), std::io::Error> - where Signer: Sign, - M: chain::Watch, - T: BroadcasterInterface, - K: KeysInterface, - F: FeeEstimator, - L: Logger - { - let path = PathBuf::from(data_dir); - util::write_to_file(path, "manager".to_string(), manager) - } - /// Read `ChannelMonitor`s from disk. pub fn read_channelmonitors ( &self, keys_manager: K - ) -> Result)>, std::io::Error> - where K::Target: KeysInterface + Sized + ) -> Result)>, std::io::Error> + where K::Target: KeysInterface + Sized, { - let path = self.path_to_monitor_data(); + let mut path = PathBuf::from(&self.path_to_channel_data); + path.push("monitors"); if !Path::new(&path).exists() { - return Ok(HashMap::new()); + return Ok(Vec::new()); } - let mut outpoint_to_channelmonitor = HashMap::new(); + let mut res = Vec::new(); for file_option in fs::read_dir(path).unwrap() { let file = file_option.unwrap(); let owned_file_name = file.file_name(); @@ -123,6 +80,12 @@ impl FilesystemPersister { "Invalid ChannelMonitor file name", )); } + if filename.unwrap().ends_with(".tmp") { + // If we were in the middle of committing an new update and crashed, it should be + // safe to ignore the update - we should never have returned to the caller and + // irrevocably committed to the new state in any way. + continue; + } let txid = Txid::from_hex(filename.unwrap().split_at(64).0); if txid.is_err() { @@ -144,10 +107,10 @@ impl FilesystemPersister { let mut buffer = Cursor::new(&contents); match <(BlockHash, ChannelMonitor)>::read(&mut buffer, &*keys_manager) { Ok((blockhash, channel_monitor)) => { - outpoint_to_channelmonitor.insert( - OutPoint { txid: txid.unwrap(), index: index.unwrap() }, - (blockhash, channel_monitor), - ); + if channel_monitor.get_funding_txo().0.txid != txid.unwrap() || channel_monitor.get_funding_txo().0.index != index.unwrap() { + return Err(std::io::Error::new(std::io::ErrorKind::InvalidData, "ChannelMonitor was stored in the wrong file")); + } + res.push((blockhash, channel_monitor)); } Err(e) => return Err(std::io::Error::new( std::io::ErrorKind::InvalidData, @@ -155,21 +118,15 @@ impl FilesystemPersister { )) } } - Ok(outpoint_to_channelmonitor) + Ok(res) } } -impl channelmonitor::Persist for FilesystemPersister { - fn persist_new_channel(&self, funding_txo: OutPoint, monitor: &ChannelMonitor) -> Result<(), ChannelMonitorUpdateErr> { - let filename = format!("{}_{}", funding_txo.txid.to_hex(), funding_txo.index); - util::write_to_file(self.path_to_monitor_data(), filename, monitor) - .map_err(|_| ChannelMonitorUpdateErr::PermanentFailure) - } - - fn update_persisted_channel(&self, funding_txo: OutPoint, _update: &ChannelMonitorUpdate, monitor: &ChannelMonitor) -> Result<(), ChannelMonitorUpdateErr> { - let filename = format!("{}_{}", funding_txo.txid.to_hex(), funding_txo.index); - util::write_to_file(self.path_to_monitor_data(), filename, monitor) - .map_err(|_| ChannelMonitorUpdateErr::PermanentFailure) +impl KVStorePersister for FilesystemPersister { + fn persist(&self, key: &str, object: &W) -> std::io::Result<()> { + let mut dest_file = PathBuf::from(self.path_to_channel_data.clone()); + dest_file.push(key); + util::write_to_file(dest_file, object) } } @@ -180,16 +137,17 @@ mod tests { use crate::FilesystemPersister; use bitcoin::blockdata::block::{Block, BlockHeader}; use bitcoin::hashes::hex::FromHex; - use bitcoin::Txid; - use lightning::chain::channelmonitor::{Persist, ChannelMonitorUpdateErr}; + use bitcoin::{Txid, TxMerkleNode}; + use lightning::chain::ChannelMonitorUpdateErr; + use lightning::chain::chainmonitor::Persist; use lightning::chain::transaction::OutPoint; - use lightning::{check_closed_broadcast, check_added_monitors}; + use lightning::{check_closed_broadcast, check_closed_event, check_added_monitors}; use lightning::ln::features::InitFeatures; use lightning::ln::functional_test_utils::*; - use lightning::ln::msgs::ErrorAction; - use lightning::util::events::{MessageSendEventsProvider, MessageSendEvent}; + use lightning::util::events::{ClosureReason, MessageSendEventsProvider}; use lightning::util::test_utils; use std::fs; + use bitcoin::hashes::Hash; #[cfg(target_os = "windows")] use { lightning::get_event_msg, @@ -227,21 +185,21 @@ mod tests { // Check that the persisted channel data is empty before any channels are // open. let mut persisted_chan_data_0 = persister_0.read_channelmonitors(nodes[0].keys_manager).unwrap(); - assert_eq!(persisted_chan_data_0.keys().len(), 0); + assert_eq!(persisted_chan_data_0.len(), 0); let mut persisted_chan_data_1 = persister_1.read_channelmonitors(nodes[1].keys_manager).unwrap(); - assert_eq!(persisted_chan_data_1.keys().len(), 0); + assert_eq!(persisted_chan_data_1.len(), 0); // Helper to make sure the channel is on the expected update ID. macro_rules! check_persisted_data { ($expected_update_id: expr) => { persisted_chan_data_0 = persister_0.read_channelmonitors(nodes[0].keys_manager).unwrap(); - assert_eq!(persisted_chan_data_0.keys().len(), 1); - for (_, mon) in persisted_chan_data_0.values() { + assert_eq!(persisted_chan_data_0.len(), 1); + for (_, mon) in persisted_chan_data_0.iter() { assert_eq!(mon.get_latest_update_id(), $expected_update_id); } persisted_chan_data_1 = persister_1.read_channelmonitors(nodes[1].keys_manager).unwrap(); - assert_eq!(persisted_chan_data_1.keys().len(), 1); - for (_, mon) in persisted_chan_data_1.values() { + assert_eq!(persisted_chan_data_1.len(), 1); + for (_, mon) in persisted_chan_data_1.iter() { assert_eq!(mon.get_latest_update_id(), $expected_update_id); } } @@ -252,23 +210,25 @@ mod tests { check_persisted_data!(0); // Send a few payments and make sure the monitors are updated to the latest. - send_payment(&nodes[0], &vec!(&nodes[1])[..], 8000000, 8_000_000); + send_payment(&nodes[0], &vec!(&nodes[1])[..], 8000000); check_persisted_data!(5); - send_payment(&nodes[1], &vec!(&nodes[0])[..], 4000000, 4_000_000); + send_payment(&nodes[1], &vec!(&nodes[0])[..], 4000000); check_persisted_data!(10); // Force close because cooperative close doesn't result in any persisted // updates. - nodes[0].node.force_close_channel(&nodes[0].node.list_channels()[0].channel_id).unwrap(); + nodes[0].node.force_close_broadcasting_latest_txn(&nodes[0].node.list_channels()[0].channel_id, &nodes[1].node.get_our_node_id()).unwrap(); + check_closed_event!(nodes[0], 1, ClosureReason::HolderForceClosed); check_closed_broadcast!(nodes[0], true); check_added_monitors!(nodes[0], 1); let node_txn = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap(); assert_eq!(node_txn.len(), 1); - let header = BlockHeader { version: 0x20000000, prev_blockhash: nodes[0].best_block_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 }; + let header = BlockHeader { version: 0x20000000, prev_blockhash: nodes[0].best_block_hash(), merkle_root: TxMerkleNode::all_zeros(), time: 42, bits: 42, nonce: 42 }; connect_block(&nodes[1], &Block { header, txdata: vec![node_txn[0].clone(), node_txn[0].clone()]}); check_closed_broadcast!(nodes[1], true); + check_closed_event!(nodes[1], 1, ClosureReason::CommitmentTxConfirmed); check_added_monitors!(nodes[1], 1); // Make sure everything is persisted as expected after close. @@ -291,8 +251,11 @@ mod tests { let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]); let nodes = create_network(2, &node_cfgs, &node_chanmgrs); let chan = create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known()); - nodes[1].node.force_close_channel(&chan.2).unwrap(); + nodes[1].node.force_close_broadcasting_latest_txn(&chan.2, &nodes[0].node.get_our_node_id()).unwrap(); + check_closed_event!(nodes[1], 1, ClosureReason::HolderForceClosed); let mut added_monitors = nodes[1].chain_monitor.added_monitors.lock().unwrap(); + let update_map = nodes[1].chain_monitor.latest_monitor_update_id.lock().unwrap(); + let update_id = update_map.get(&added_monitors[0].0.to_channel_id()).unwrap(); // Set the persister's directory to read-only, which should result in // returning a permanent failure when we then attempt to persist a @@ -306,7 +269,7 @@ mod tests { txid: Txid::from_hex("8984484a580b825b9972d7adb15050b3ab624ccd731946b3eeddb92f4e7ef6be").unwrap(), index: 0 }; - match persister.persist_new_channel(test_txo, &added_monitors[0].1) { + match persister.persist_new_channel(test_txo, &added_monitors[0].1, update_id.2) { Err(ChannelMonitorUpdateErr::PermanentFailure) => {}, _ => panic!("unexpected result from persisting new channel") } @@ -327,8 +290,11 @@ mod tests { let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]); let nodes = create_network(2, &node_cfgs, &node_chanmgrs); let chan = create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known()); - nodes[1].node.force_close_channel(&chan.2).unwrap(); + nodes[1].node.force_close_broadcasting_latest_txn(&chan.2, &nodes[0].node.get_our_node_id()).unwrap(); + check_closed_event!(nodes[1], 1, ClosureReason::HolderForceClosed); let mut added_monitors = nodes[1].chain_monitor.added_monitors.lock().unwrap(); + let update_map = nodes[1].chain_monitor.latest_monitor_update_id.lock().unwrap(); + let update_id = update_map.get(&added_monitors[0].0.to_channel_id()).unwrap(); // Create the persister with an invalid directory name and test that the // channel fails to open because the directories fail to be created. There @@ -340,7 +306,7 @@ mod tests { txid: Txid::from_hex("8984484a580b825b9972d7adb15050b3ab624ccd731946b3eeddb92f4e7ef6be").unwrap(), index: 0 }; - match persister.persist_new_channel(test_txo, &added_monitors[0].1) { + match persister.persist_new_channel(test_txo, &added_monitors[0].1, update_id.2) { Err(ChannelMonitorUpdateErr::PermanentFailure) => {}, _ => panic!("unexpected result from persisting new channel") } @@ -350,7 +316,7 @@ mod tests { } } -#[cfg(all(test, feature = "unstable"))] +#[cfg(all(test, feature = "_bench_unstable"))] pub mod bench { use test::Bencher;