Next draft. Features: connectpeer, listchannels, sendpayment, autoreconnect to chan...

[ldk-sample] / src / disk.rs

diff --git a/src/disk.rs b/src/disk.rs
new file mode 100644 (file)
index 0000000..81e2e95
--- /dev/null
+++ b/src/disk.rs
@@ -0,0 +1,105 @@
+use bitcoin::{BlockHash, Txid};
+use bitcoin::hashes::hex::FromHex;
+use bitcoin::secp256k1::key::PublicKey;
+use crate::cli;
+use lightning::chain::channelmonitor::ChannelMonitor;
+use lightning::chain::keysinterface::{InMemorySigner, KeysManager};
+use lightning::chain::transaction::OutPoint;
+use lightning::util::logger::{Logger, Record};
+use lightning::util::ser::{ReadableArgs, Writer};
+use std::collections::HashMap;
+use std::fs;
+use std::fs::File;
+// use std::io::{BufRead, BufReader, Cursor, Write};
+use std::io::{BufRead, BufReader, Cursor};
+use std::net::SocketAddr;
+use std::path::Path;
+use std::sync::Arc;
+use time::OffsetDateTime;
+
+pub(crate) struct FilesystemLogger{
+    data_dir: String
+}
+impl FilesystemLogger {
+    pub(crate) fn new(data_dir: String) -> Self {
+        let logs_path = format!("{}/logs", data_dir);
+        fs::create_dir_all(logs_path.clone()).unwrap();
+        Self {
+            data_dir: logs_path
+        }
+    }
+}
+impl Logger for FilesystemLogger {
+         fn log(&self, record: &Record) {
+                   let raw_log = record.args.to_string();
+                         let log = format!("{} {:<5} [{}:{}] {}\n", OffsetDateTime::now_utc().format("%F %T"),
+                          record.level.to_string(), record.module_path, record.line, raw_log);
+        let logs_file_path = format!("{}/logs.txt", self.data_dir.clone());
+        fs::OpenOptions::new().create(true).append(true).open(logs_file_path).unwrap()
+            .write_all(log.as_bytes()).unwrap();
+         }
+}
+pub(crate) fn persist_channel_peer(path: &Path, peer_info: &str) -> std::io::Result<()> {
+    let mut file = fs::OpenOptions::new().create(true).append(true).open(path)?;
+    file.write_all(format!("{}\n", peer_info).as_bytes())
+}
+
+pub(crate) fn read_channel_peer_data(path: &Path) -> Result<HashMap<PublicKey, SocketAddr>, std::io::Error> {
+    let mut peer_data = HashMap::new();
+    if !Path::new(&path).exists() {
+        return Ok(HashMap::new())
+    }
+    let file = File::open(path)?;
+    let reader = BufReader::new(file);
+    for line in reader.lines() {
+        match cli::parse_peer_info(line.unwrap()) {
+            Ok((pubkey, socket_addr)) => {
+                peer_data.insert(pubkey, socket_addr);
+            },
+            Err(e) => return Err(e)
+        }
+    }
+    Ok(peer_data)
+}
+
+
+pub(crate) fn read_channelmonitors_from_disk(path: String, keys_manager: Arc<KeysManager>) ->
+    Result<HashMap<OutPoint, (BlockHash, ChannelMonitor<InMemorySigner>)>, std::io::Error>
+{
+    if !Path::new(&path).exists() {
+        return Ok(HashMap::new())
+    }
+    let mut outpoint_to_channelmonitor = HashMap::new();
+    for file_option in fs::read_dir(path).unwrap() {
+        let file = file_option.unwrap();
+        let owned_file_name = file.file_name();
+        let filename = owned_file_name.to_str();
+        if !filename.is_some() || !filename.unwrap().is_ascii() || filename.unwrap().len() < 65 {
+            return Err(std::io::Error::new(std::io::ErrorKind::Other, "Invalid ChannelMonitor file name"));
+        }
+
+        let txid = Txid::from_hex(filename.unwrap().split_at(64).0);
+        if txid.is_err() {
+            return Err(std::io::Error::new(std::io::ErrorKind::Other, "Invalid tx ID in filename"));
+        }
+
+        let index = filename.unwrap().split_at(65).1.split('.').next().unwrap().parse();
+        if index.is_err() {
+            return Err(std::io::Error::new(std::io::ErrorKind::Other, "Invalid tx index in filename"));
+        }
+
+        let contents = fs::read(&file.path())?;
+
+        if let Ok((blockhash, channel_monitor)) =
+            <(BlockHash, ChannelMonitor<InMemorySigner>)>::read(&mut Cursor::new(&contents),
+                                                        &*keys_manager)
+        {
+                outpoint_to_channelmonitor.insert(OutPoint { txid: txid.unwrap(), index: index.unwrap() },
+                                                  (blockhash, channel_monitor));
+            } else {
+                return Err(std::io::Error::new(std::io::ErrorKind::Other,
+                                           "Failed to deserialize ChannelMonitor"));
+            }
+    }
+    Ok(outpoint_to_channelmonitor)
+}