2 use bitcoin::secp256k1::key::PublicKey;
3 use bitcoin::BlockHash;
5 use lightning::routing::network_graph::NetworkGraph;
6 use lightning::routing::scoring::{ProbabilisticScorer, ProbabilisticScoringParameters};
7 use lightning::util::logger::{Logger, Record};
8 use lightning::util::ser::{Readable, ReadableArgs, Writeable, Writer};
9 use std::collections::HashMap;
12 use std::io::{BufRead, BufReader, BufWriter};
13 use std::net::SocketAddr;
17 pub(crate) struct FilesystemLogger {
20 impl FilesystemLogger {
21 pub(crate) fn new(data_dir: String) -> Self {
22 let logs_path = format!("{}/logs", data_dir);
23 fs::create_dir_all(logs_path.clone()).unwrap();
24 Self { data_dir: logs_path }
27 impl Logger for FilesystemLogger {
28 fn log(&self, record: &Record) {
29 let raw_log = record.args.to_string();
31 "{} {:<5} [{}:{}] {}\n",
32 // Note that a "real" lightning node almost certainly does *not* want subsecond
33 // precision for message-receipt information as it makes log entries a target for
34 // deanonymization attacks. For testing, however, its quite useful.
35 Utc::now().format("%Y-%m-%d %H:%M:%S%.3f"),
36 record.level.to_string(),
41 let logs_file_path = format!("{}/logs.txt", self.data_dir.clone());
42 fs::OpenOptions::new()
47 .write_all(log.as_bytes())
51 pub(crate) fn persist_channel_peer(path: &Path, peer_info: &str) -> std::io::Result<()> {
52 let mut file = fs::OpenOptions::new().create(true).append(true).open(path)?;
53 file.write_all(format!("{}\n", peer_info).as_bytes())
56 pub(crate) fn read_channel_peer_data(
58 ) -> Result<HashMap<PublicKey, SocketAddr>, std::io::Error> {
59 let mut peer_data = HashMap::new();
60 if !Path::new(&path).exists() {
61 return Ok(HashMap::new());
63 let file = File::open(path)?;
64 let reader = BufReader::new(file);
65 for line in reader.lines() {
66 match cli::parse_peer_info(line.unwrap()) {
67 Ok((pubkey, socket_addr)) => {
68 peer_data.insert(pubkey, socket_addr);
70 Err(e) => return Err(e),
76 pub(crate) fn persist_network(path: &Path, network_graph: &NetworkGraph) -> std::io::Result<()> {
77 let mut tmp_path = path.to_path_buf().into_os_string();
78 tmp_path.push(".tmp");
79 let file = fs::OpenOptions::new().write(true).create(true).open(&tmp_path)?;
80 let write_res = network_graph.write(&mut BufWriter::new(file));
81 if let Err(e) = write_res.and_then(|_| fs::rename(&tmp_path, path)) {
82 let _ = fs::remove_file(&tmp_path);
89 pub(crate) fn read_network(path: &Path, genesis_hash: BlockHash) -> NetworkGraph {
90 if let Ok(file) = File::open(path) {
91 if let Ok(graph) = NetworkGraph::read(&mut BufReader::new(file)) {
95 NetworkGraph::new(genesis_hash)
98 pub(crate) fn persist_scorer(
99 path: &Path, scorer: &ProbabilisticScorer<Arc<NetworkGraph>>,
100 ) -> std::io::Result<()> {
101 let mut tmp_path = path.to_path_buf().into_os_string();
102 tmp_path.push(".tmp");
103 let file = fs::OpenOptions::new().write(true).create(true).open(&tmp_path)?;
104 let write_res = scorer.write(&mut BufWriter::new(file));
105 if let Err(e) = write_res.and_then(|_| fs::rename(&tmp_path, path)) {
106 let _ = fs::remove_file(&tmp_path);
113 pub(crate) fn read_scorer(
114 path: &Path, graph: Arc<NetworkGraph>,
115 ) -> ProbabilisticScorer<Arc<NetworkGraph>> {
116 let params = ProbabilisticScoringParameters::default();
117 if let Ok(file) = File::open(path) {
119 ProbabilisticScorer::read(&mut BufReader::new(file), (params, Arc::clone(&graph)))
124 ProbabilisticScorer::new(params, graph)