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

   1 use crate::cli;
   2 use bitcoin::hashes::hex::FromHex;
   3 use bitcoin::secp256k1::key::PublicKey;
   4 use bitcoin::{BlockHash, Txid};
   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 { data_dir: logs_path }
  28         }
  29 }
  30 impl Logger for FilesystemLogger {
  31         fn log(&self, record: &Record) {
  32                 let raw_log = record.args.to_string();
  33                 let log = format!(
  34                         "{} {:<5} [{}:{}] {}\n",
  35                         OffsetDateTime::now_utc().format("%F %T"),
  36                         record.level.to_string(),
  37                         record.module_path,
  38                         record.line,
  39                         raw_log
  40                 );
  41                 let logs_file_path = format!("{}/logs.txt", self.data_dir.clone());
  42                 fs::OpenOptions::new()
  43                         .create(true)
  44                         .append(true)
  45                         .open(logs_file_path)
  46                         .unwrap()
  47                         .write_all(log.as_bytes())
  48                         .unwrap();
  49         }
  50 }
  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())
  54 }
  55
  56 pub(crate) fn read_channel_peer_data(
  57         path: &Path,
  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());
  62         }
  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);
  69                         }
  70                         Err(e) => return Err(e),
  71                 }
  72         }
  73         Ok(peer_data)
  74 }
  75
  76 pub(crate) fn read_channelmonitors(
  77         path: String, keys_manager: Arc<KeysManager>,
  78 ) -> Result<HashMap<OutPoint, (BlockHash, ChannelMonitor<InMemorySigner>)>, std::io::Error> {
  79         if !Path::new(&path).exists() {
  80                 return Ok(HashMap::new());
  81         }
  82         let mut outpoint_to_channelmonitor = HashMap::new();
  83         for file_option in fs::read_dir(path).unwrap() {
  84                 let file = file_option.unwrap();
  85                 let owned_file_name = file.file_name();
  86                 let filename = owned_file_name.to_str();
  87                 if !filename.is_some() || !filename.unwrap().is_ascii() || filename.unwrap().len() < 65 {
  88                         return Err(std::io::Error::new(
  89                                 std::io::ErrorKind::Other,
  90                                 "Invalid ChannelMonitor file name",
  91                         ));
  92                 }
  93
  94                 let txid = Txid::from_hex(filename.unwrap().split_at(64).0);
  95                 if txid.is_err() {
  96                         return Err(std::io::Error::new(
  97                                 std::io::ErrorKind::Other,
  98                                 "Invalid tx ID in filename",
  99                         ));
 100                 }
 101
 102                 let index = filename.unwrap().split_at(65).1.split('.').next().unwrap().parse();
 103                 if index.is_err() {
 104                         return Err(std::io::Error::new(
 105                                 std::io::ErrorKind::Other,
 106                                 "Invalid tx index in filename",
 107                         ));
 108                 }
 109
 110                 let contents = fs::read(&file.path())?;
 111
 112                 if let Ok((blockhash, channel_monitor)) =
 113                         <(BlockHash, ChannelMonitor<InMemorySigner>)>::read(
 114                                 &mut Cursor::new(&contents),
 115                                 &*keys_manager,
 116                         ) {
 117                         outpoint_to_channelmonitor.insert(
 118                                 OutPoint { txid: txid.unwrap(), index: index.unwrap() },
 119                                 (blockhash, channel_monitor),
 120                         );
 121                 } else {
 122                         return Err(std::io::Error::new(
 123                                 std::io::ErrorKind::Other,
 124                                 "Failed to deserialize ChannelMonitor",
 125                         ));
 126                 }
 127         }
 128         Ok(outpoint_to_channelmonitor)
 129 }