#![deny(broken_intra_doc_links)]
#![deny(missing_docs)]
#![cfg_attr(all(test, feature = "unstable"), feature(test))]
#[cfg(all(test, feature = "unstable"))] extern crate test;
mod util;
extern crate lightning;
extern crate bitcoin;
extern crate libc;
use bitcoin::hash_types::{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 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::fs;
use std::io::{Cursor, Error};
use std::ops::Deref;
use std::path::{Path, PathBuf};
pub struct FilesystemPersister {
path_to_channel_data: String,
}
impl<Signer: Sign> DiskWriteable for ChannelMonitor<Signer> {
fn write_to_file(&self, writer: &mut fs::File) -> Result<(), Error> {
self.write(writer)
}
}
impl<Signer: Sign, M: Deref, T: Deref, K: Deref, F: Deref, L: Deref> DiskWriteable for ChannelManager<Signer, M, T, K, F, L>
where
M::Target: chain::Watch<Signer>,
T::Target: BroadcasterInterface,
K::Target: KeysInterface<Signer=Signer>,
F::Target: FeeEstimator,
L::Target: Logger,
{
fn write_to_file(&self, writer: &mut fs::File) -> Result<(), std::io::Error> {
self.write(writer)
}
}
impl FilesystemPersister {
pub fn new(path_to_channel_data: String) -> Self {
return Self {
path_to_channel_data,
}
}
pub fn get_data_dir(&self) -> String {
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
}
pub fn persist_manager<Signer: Sign, M: Deref, T: Deref, K: Deref, F: Deref, L: Deref>(
data_dir: String,
manager: &ChannelManager<Signer, M, T, K, F, L>
) -> Result<(), std::io::Error>
where
M::Target: chain::Watch<Signer>,
T::Target: BroadcasterInterface,
K::Target: KeysInterface<Signer=Signer>,
F::Target: FeeEstimator,
L::Target: Logger,
{
let path = PathBuf::from(data_dir);
util::write_to_file(path, "manager".to_string(), manager)
}
pub fn read_channelmonitors<Signer: Sign, K: Deref> (
&self, keys_manager: K
) -> Result<Vec<(BlockHash, ChannelMonitor<Signer>)>, std::io::Error>
where K::Target: KeysInterface<Signer=Signer> + Sized,
{
let path = self.path_to_monitor_data();
if !Path::new(&path).exists() {
return Ok(Vec::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();
let filename = owned_file_name.to_str();
if !filename.is_some() || !filename.unwrap().is_ascii() || filename.unwrap().len() < 65 {
return Err(std::io::Error::new(
std::io::ErrorKind::InvalidData,
"Invalid ChannelMonitor file name",
));
}
let txid = Txid::from_hex(filename.unwrap().split_at(64).0);
if txid.is_err() {
return Err(std::io::Error::new(
std::io::ErrorKind::InvalidData,
"Invalid tx ID in filename",
));
}
let index = filename.unwrap().split_at(65).1.parse();
if index.is_err() {
return Err(std::io::Error::new(
std::io::ErrorKind::InvalidData,
"Invalid tx index in filename",
));
}
let contents = fs::read(&file.path())?;
let mut buffer = Cursor::new(&contents);
match <(BlockHash, ChannelMonitor<Signer>)>::read(&mut buffer, &*keys_manager) {
Ok((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,
format!("Failed to deserialize ChannelMonitor: {}", e),
))
}
}
Ok(res)
}
}
impl<ChannelSigner: Sign> channelmonitor::Persist<ChannelSigner> for FilesystemPersister {
fn persist_new_channel(&self, funding_txo: OutPoint, monitor: &ChannelMonitor<ChannelSigner>) -> 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<ChannelSigner>) -> 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)
}
}
#[cfg(test)]
mod tests {
extern crate lightning;
extern crate bitcoin;
use crate::FilesystemPersister;
use bitcoin::blockdata::block::{Block, BlockHeader};
use bitcoin::hashes::hex::FromHex;
use bitcoin::Txid;
use lightning::chain::channelmonitor::{Persist, ChannelMonitorUpdateErr};
use lightning::chain::transaction::OutPoint;
use lightning::{check_closed_broadcast, 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::test_utils;
use std::fs;
#[cfg(target_os = "windows")]
use {
lightning::get_event_msg,
lightning::ln::msgs::ChannelMessageHandler,
};
impl Drop for FilesystemPersister {
fn drop(&mut self) {
match fs::remove_dir_all(&self.path_to_channel_data) {
Err(e) => println!("Failed to remove test persister directory: {}", e),
_ => {}
}
}
}
#[test]
fn test_filesystem_persister() {
let persister_0 = FilesystemPersister::new("test_filesystem_persister_0".to_string());
let persister_1 = FilesystemPersister::new("test_filesystem_persister_1".to_string());
let chanmon_cfgs = create_chanmon_cfgs(2);
let mut node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
let chain_mon_0 = test_utils::TestChainMonitor::new(Some(&chanmon_cfgs[0].chain_source), &chanmon_cfgs[0].tx_broadcaster, &chanmon_cfgs[0].logger, &chanmon_cfgs[0].fee_estimator, &persister_0, &node_cfgs[0].keys_manager);
let chain_mon_1 = test_utils::TestChainMonitor::new(Some(&chanmon_cfgs[1].chain_source), &chanmon_cfgs[1].tx_broadcaster, &chanmon_cfgs[1].logger, &chanmon_cfgs[1].fee_estimator, &persister_1, &node_cfgs[1].keys_manager);
node_cfgs[0].chain_monitor = chain_mon_0;
node_cfgs[1].chain_monitor = chain_mon_1;
let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
let mut persisted_chan_data_0 = persister_0.read_channelmonitors(nodes[0].keys_manager).unwrap();
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.len(), 0);
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.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.len(), 1);
for (_, mon) in persisted_chan_data_1.iter() {
assert_eq!(mon.get_latest_update_id(), $expected_update_id);
}
}
}
let _ = create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known());
check_persisted_data!(0);
send_payment(&nodes[0], &vec!(&nodes[1])[..], 8000000);
check_persisted_data!(5);
send_payment(&nodes[1], &vec!(&nodes[0])[..], 4000000);
check_persisted_data!(10);
nodes[0].node.force_close_channel(&nodes[0].node.list_channels()[0].channel_id).unwrap();
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 };
connect_block(&nodes[1], &Block { header, txdata: vec![node_txn[0].clone(), node_txn[0].clone()]});
check_closed_broadcast!(nodes[1], true);
check_added_monitors!(nodes[1], 1);
check_persisted_data!(11);
}
#[cfg(not(target_os = "windows"))]
#[test]
fn test_readonly_dir_perm_failure() {
let persister = FilesystemPersister::new("test_readonly_dir_perm_failure".to_string());
fs::create_dir_all(&persister.path_to_channel_data).unwrap();
let chanmon_cfgs = create_chanmon_cfgs(2);
let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
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();
let mut added_monitors = nodes[1].chain_monitor.added_monitors.lock().unwrap();
let path = &persister.path_to_channel_data;
let mut perms = fs::metadata(path).unwrap().permissions();
perms.set_readonly(true);
fs::set_permissions(path, perms).unwrap();
let test_txo = OutPoint {
txid: Txid::from_hex("8984484a580b825b9972d7adb15050b3ab624ccd731946b3eeddb92f4e7ef6be").unwrap(),
index: 0
};
match persister.persist_new_channel(test_txo, &added_monitors[0].1) {
Err(ChannelMonitorUpdateErr::PermanentFailure) => {},
_ => panic!("unexpected result from persisting new channel")
}
nodes[1].node.get_and_clear_pending_msg_events();
added_monitors.clear();
}
#[cfg(target_os = "windows")]
#[test]
fn test_fail_on_open() {
let chanmon_cfgs = create_chanmon_cfgs(2);
let mut node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
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();
let mut added_monitors = nodes[1].chain_monitor.added_monitors.lock().unwrap();
let persister = FilesystemPersister::new(":<>/".to_string());
let test_txo = OutPoint {
txid: Txid::from_hex("8984484a580b825b9972d7adb15050b3ab624ccd731946b3eeddb92f4e7ef6be").unwrap(),
index: 0
};
match persister.persist_new_channel(test_txo, &added_monitors[0].1) {
Err(ChannelMonitorUpdateErr::PermanentFailure) => {},
_ => panic!("unexpected result from persisting new channel")
}
nodes[1].node.get_and_clear_pending_msg_events();
added_monitors.clear();
}
}
#[cfg(all(test, feature = "unstable"))]
pub mod bench {
use test::Bencher;
#[bench]
fn bench_sends(bench: &mut Bencher) {
let persister_a = super::FilesystemPersister::new("bench_filesystem_persister_a".to_string());
let persister_b = super::FilesystemPersister::new("bench_filesystem_persister_b".to_string());
lightning::ln::channelmanager::bench::bench_two_sends(bench, persister_a, persister_b);
}
}