_ Git - ldk-sample/blob - src/disk.rs

   1 use crate::{cli, NetworkGraph};
   2 use bitcoin::secp256k1::PublicKey;
   3 use bitcoin::BlockHash;
   4 use chrono::Utc;
   5 use lightning::routing::scoring::{ProbabilisticScorer, ProbabilisticScoringParameters};
   6 use lightning::util::logger::{Logger, Record};
   7 use lightning::util::ser::{ReadableArgs, Writer};
   8 use std::collections::HashMap;
   9 use std::fs;
  10 use std::fs::File;
  11 use std::io::{BufRead, BufReader};
  12 use std::net::SocketAddr;
  13 use std::path::Path;
  14 use std::sync::Arc;
  15
  16 pub(crate) struct FilesystemLogger {
  17         data_dir: String,
  18 }
  19 impl FilesystemLogger {
  20         pub(crate) fn new(data_dir: String) -> Self {
  21                 let logs_path = format!("{}/logs", data_dir);
  22                 fs::create_dir_all(logs_path.clone()).unwrap();
  23                 Self { data_dir: logs_path }
  24         }
  25 }
  26 impl Logger for FilesystemLogger {
  27         fn log(&self, record: &Record) {
  28                 let raw_log = record.args.to_string();
  29                 let log = format!(
  30                         "{} {:<5} [{}:{}] {}\n",
  31                         // Note that a "real" lightning node almost certainly does *not* want subsecond
  32                         // precision for message-receipt information as it makes log entries a target for
  33                         // deanonymization attacks. For testing, however, its quite useful.
  34                         Utc::now().format("%Y-%m-%d %H:%M:%S%.3f"),
  35                         record.level.to_string(),
  36                         record.module_path,
  37                         record.line,
  38                         raw_log
  39                 );
  40                 let logs_file_path = format!("{}/logs.txt", self.data_dir.clone());
  41                 fs::OpenOptions::new()
  42                         .create(true)
  43                         .append(true)
  44                         .open(logs_file_path)
  45                         .unwrap()
  46                         .write_all(log.as_bytes())
  47                         .unwrap();
  48         }
  49 }
  50 pub(crate) fn persist_channel_peer(path: &Path, peer_info: &str) -> std::io::Result<()> {
  51         let mut file = fs::OpenOptions::new().create(true).append(true).open(path)?;
  52         file.write_all(format!("{}\n", peer_info).as_bytes())
  53 }
  54
  55 pub(crate) fn read_channel_peer_data(
  56         path: &Path,
  57 ) -> Result<HashMap<PublicKey, SocketAddr>, std::io::Error> {
  58         let mut peer_data = HashMap::new();
  59         if !Path::new(&path).exists() {
  60                 return Ok(HashMap::new());
  61         }
  62         let file = File::open(path)?;
  63         let reader = BufReader::new(file);
  64         for line in reader.lines() {
  65                 match cli::parse_peer_info(line.unwrap()) {
  66                         Ok((pubkey, socket_addr)) => {
  67                                 peer_data.insert(pubkey, socket_addr);
  68                         }
  69                         Err(e) => return Err(e),
  70                 }
  71         }
  72         Ok(peer_data)
  73 }
  74
  75 pub(crate) fn read_network(
  76         path: &Path, genesis_hash: BlockHash, logger: Arc<FilesystemLogger>,
  77 ) -> NetworkGraph {
  78         if let Ok(file) = File::open(path) {
  79                 if let Ok(graph) = NetworkGraph::read(&mut BufReader::new(file), logger.clone()) {
  80                         return graph;
  81                 }
  82         }
  83         NetworkGraph::new(genesis_hash, logger)
  84 }
  85
  86 pub(crate) fn read_scorer(
  87         path: &Path, graph: Arc<NetworkGraph>, logger: Arc<FilesystemLogger>,
  88 ) -> ProbabilisticScorer<Arc<NetworkGraph>, Arc<FilesystemLogger>> {
  89         let params = ProbabilisticScoringParameters::default();
  90         if let Ok(file) = File::open(path) {
  91                 let args = (params.clone(), Arc::clone(&graph), Arc::clone(&logger));
  92                 if let Ok(scorer) = ProbabilisticScorer::read(&mut BufReader::new(file), args) {
  93                         return scorer;
  94                 }
  95         }
  96         ProbabilisticScorer::new(params, graph, logger)
  97 }