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

   1 use bitcoin::{BlockHash, Txid};
   2 use bitcoin::hashes::hex::FromHex;
   3 use bitcoin::secp256k1::key::PublicKey;
   4 use crate::cli;
   5 use lightning::chain::channelmonitor::ChannelMonitor;
   6 use lightning::chain::keysinterface::{InMemorySigner, KeysManager};
   7 use lightning::chain::transaction::OutPoint;
   8 use lightning::util::logger::{Logger, Record};
   9 use lightning::util::ser::{ReadableArgs, Writer};
  10 use std::collections::HashMap;
  11 use std::fs;
  12 use std::fs::File;
  13 // use std::io::{BufRead, BufReader, Cursor, Write};
  14 use std::io::{BufRead, BufReader, Cursor};
  15 use std::net::SocketAddr;
  16 use std::path::Path;
  17 use std::sync::Arc;
  18 use time::OffsetDateTime;
  19
  20 pub(crate) struct FilesystemLogger{
  21     data_dir: String
  22 }
  23 impl FilesystemLogger {
  24     pub(crate) fn new(data_dir: String) -> Self {
  25         let logs_path = format!("{}/logs", data_dir);
  26         fs::create_dir_all(logs_path.clone()).unwrap();
  27         Self {
  28             data_dir: logs_path
  29         }
  30     }
  31 }
  32 impl Logger for FilesystemLogger {
  33           fn log(&self, record: &Record) {
  34                     let raw_log = record.args.to_string();
  35                           let log = format!("{} {:<5} [{}:{}] {}\n", OffsetDateTime::now_utc().format("%F %T"),
  36                           record.level.to_string(), record.module_path, record.line, raw_log);
  37         let logs_file_path = format!("{}/logs.txt", self.data_dir.clone());
  38         fs::OpenOptions::new().create(true).append(true).open(logs_file_path).unwrap()
  39             .write_all(log.as_bytes()).unwrap();
  40           }
  41 }
  42 pub(crate) fn persist_channel_peer(path: &Path, peer_info: &str) -> std::io::Result<()> {
  43     let mut file = fs::OpenOptions::new().create(true).append(true).open(path)?;
  44     file.write_all(format!("{}\n", peer_info).as_bytes())
  45 }
  46
  47 pub(crate) fn read_channel_peer_data(path: &Path) -> Result<HashMap<PublicKey, SocketAddr>, std::io::Error> {
  48     let mut peer_data = HashMap::new();
  49     if !Path::new(&path).exists() {
  50         return Ok(HashMap::new())
  51     }
  52     let file = File::open(path)?;
  53     let reader = BufReader::new(file);
  54     for line in reader.lines() {
  55         match cli::parse_peer_info(line.unwrap()) {
  56             Ok((pubkey, socket_addr)) => {
  57                 peer_data.insert(pubkey, socket_addr);
  58             },
  59             Err(e) => return Err(e)
  60         }
  61     }
  62     Ok(peer_data)
  63 }
  64
  65
  66 pub(crate) fn read_channelmonitors_from_disk(path: String, keys_manager: Arc<KeysManager>) ->
  67     Result<HashMap<OutPoint, (BlockHash, ChannelMonitor<InMemorySigner>)>, std::io::Error>
  68 {
  69     if !Path::new(&path).exists() {
  70         return Ok(HashMap::new())
  71     }
  72     let mut outpoint_to_channelmonitor = HashMap::new();
  73     for file_option in fs::read_dir(path).unwrap() {
  74         let file = file_option.unwrap();
  75         let owned_file_name = file.file_name();
  76         let filename = owned_file_name.to_str();
  77         if !filename.is_some() || !filename.unwrap().is_ascii() || filename.unwrap().len() < 65 {
  78             return Err(std::io::Error::new(std::io::ErrorKind::Other, "Invalid ChannelMonitor file name"));
  79         }
  80
  81         let txid = Txid::from_hex(filename.unwrap().split_at(64).0);
  82         if txid.is_err() {
  83             return Err(std::io::Error::new(std::io::ErrorKind::Other, "Invalid tx ID in filename"));
  84         }
  85
  86         let index = filename.unwrap().split_at(65).1.split('.').next().unwrap().parse();
  87         if index.is_err() {
  88             return Err(std::io::Error::new(std::io::ErrorKind::Other, "Invalid tx index in filename"));
  89         }
  90
  91         let contents = fs::read(&file.path())?;
  92
  93         if let Ok((blockhash, channel_monitor)) =
  94             <(BlockHash, ChannelMonitor<InMemorySigner>)>::read(&mut Cursor::new(&contents),
  95                                                         &*keys_manager)
  96         {
  97                 outpoint_to_channelmonitor.insert(OutPoint { txid: txid.unwrap(), index: index.unwrap() },
  98                                                   (blockhash, channel_monitor));
  99             } else {
 100                 return Err(std::io::Error::new(std::io::ErrorKind::Other,
 101                                            "Failed to deserialize ChannelMonitor"));
 102             }
 103     }
 104     Ok(outpoint_to_channelmonitor)
 105 }