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

   1 use crate::{cli, InboundPaymentInfoStorage, NetworkGraph, OutboundPaymentInfoStorage};
   2 use bitcoin::secp256k1::PublicKey;
   3 use bitcoin::Network;
   4 use chrono::Utc;
   5 use lightning::routing::scoring::{ProbabilisticScorer, ProbabilisticScoringDecayParameters};
   6 use lightning::util::logger::{Logger, Record};
   7 use lightning::util::ser::{Readable, 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) const INBOUND_PAYMENTS_FNAME: &str = "inbound_payments";
  17 pub(crate) const OUTBOUND_PAYMENTS_FNAME: &str = "outbound_payments";
  18
  19 pub(crate) struct FilesystemLogger {
  20         data_dir: String,
  21 }
  22 impl FilesystemLogger {
  23         pub(crate) fn new(data_dir: String) -> Self {
  24                 let logs_path = format!("{}/logs", data_dir);
  25                 fs::create_dir_all(logs_path.clone()).unwrap();
  26                 Self { data_dir: logs_path }
  27         }
  28 }
  29 impl Logger for FilesystemLogger {
  30         fn log(&self, record: &Record) {
  31                 let raw_log = record.args.to_string();
  32                 let log = format!(
  33                         "{} {:<5} [{}:{}] {}\n",
  34                         // Note that a "real" lightning node almost certainly does *not* want subsecond
  35                         // precision for message-receipt information as it makes log entries a target for
  36                         // deanonymization attacks. For testing, however, its quite useful.
  37                         Utc::now().format("%Y-%m-%d %H:%M:%S%.3f"),
  38                         record.level.to_string(),
  39                         record.module_path,
  40                         record.line,
  41                         raw_log
  42                 );
  43                 let logs_file_path = format!("{}/logs.txt", self.data_dir.clone());
  44                 fs::OpenOptions::new()
  45                         .create(true)
  46                         .append(true)
  47                         .open(logs_file_path)
  48                         .unwrap()
  49                         .write_all(log.as_bytes())
  50                         .unwrap();
  51         }
  52 }
  53 pub(crate) fn persist_channel_peer(path: &Path, peer_info: &str) -> std::io::Result<()> {
  54         let mut file = fs::OpenOptions::new().create(true).append(true).open(path)?;
  55         file.write_all(format!("{}\n", peer_info).as_bytes())
  56 }
  57
  58 pub(crate) fn read_channel_peer_data(
  59         path: &Path,
  60 ) -> Result<HashMap<PublicKey, SocketAddr>, std::io::Error> {
  61         let mut peer_data = HashMap::new();
  62         if !Path::new(&path).exists() {
  63                 return Ok(HashMap::new());
  64         }
  65         let file = File::open(path)?;
  66         let reader = BufReader::new(file);
  67         for line in reader.lines() {
  68                 match cli::parse_peer_info(line.unwrap()) {
  69                         Ok((pubkey, socket_addr)) => {
  70                                 peer_data.insert(pubkey, socket_addr);
  71                         }
  72                         Err(e) => return Err(e),
  73                 }
  74         }
  75         Ok(peer_data)
  76 }
  77
  78 pub(crate) fn read_network(
  79         path: &Path, network: Network, logger: Arc<FilesystemLogger>,
  80 ) -> NetworkGraph {
  81         if let Ok(file) = File::open(path) {
  82                 if let Ok(graph) = NetworkGraph::read(&mut BufReader::new(file), logger.clone()) {
  83                         return graph;
  84                 }
  85         }
  86         NetworkGraph::new(network, logger)
  87 }
  88
  89 pub(crate) fn read_inbound_payment_info(path: &Path) -> InboundPaymentInfoStorage {
  90         if let Ok(file) = File::open(path) {
  91                 if let Ok(info) = InboundPaymentInfoStorage::read(&mut BufReader::new(file)) {
  92                         return info;
  93                 }
  94         }
  95         InboundPaymentInfoStorage { payments: HashMap::new() }
  96 }
  97
  98 pub(crate) fn read_outbound_payment_info(path: &Path) -> OutboundPaymentInfoStorage {
  99         if let Ok(file) = File::open(path) {
 100                 if let Ok(info) = OutboundPaymentInfoStorage::read(&mut BufReader::new(file)) {
 101                         return info;
 102                 }
 103         }
 104         OutboundPaymentInfoStorage { payments: HashMap::new() }
 105 }
 106
 107 pub(crate) fn read_scorer(
 108         path: &Path, graph: Arc<NetworkGraph>, logger: Arc<FilesystemLogger>,
 109 ) -> ProbabilisticScorer<Arc<NetworkGraph>, Arc<FilesystemLogger>> {
 110         let params = ProbabilisticScoringDecayParameters::default();
 111         if let Ok(file) = File::open(path) {
 112                 let args = (params.clone(), Arc::clone(&graph), Arc::clone(&logger));
 113                 if let Ok(scorer) = ProbabilisticScorer::read(&mut BufReader::new(file), args) {
 114                         return scorer;
 115                 }
 116         }
 117         ProbabilisticScorer::new(params, graph, logger)
 118 }