X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=blobdiff_plain;f=src%2Fdisk.rs;h=7be070c962f4d73e3c9445c8a5a8730fedd71fe3;hb=e31773bd74197082c327fdeb878f28664ee65e21;hp=827cb7e9e79326f6a3b8ae5022748267c07bf72a;hpb=0f8635873858a05cdffee21eb99dd2e100e6cebc;p=ldk-sample

diff --git a/src/disk.rs b/src/disk.rs
index 827cb7e..7be070c 100644
--- a/src/disk.rs
+++ b/src/disk.rs
@@ -1,14 +1,17 @@
 use crate::cli;
 use bitcoin::secp256k1::key::PublicKey;
+use bitcoin::BlockHash;
+use chrono::Utc;
+use lightning::routing::network_graph::NetworkGraph;
+use lightning::routing::scorer::Scorer;
 use lightning::util::logger::{Logger, Record};
-use lightning::util::ser::Writer;
+use lightning::util::ser::{Readable, Writeable, Writer};
 use std::collections::HashMap;
 use std::fs;
 use std::fs::File;
-use std::io::{BufRead, BufReader};
+use std::io::{BufRead, BufReader, BufWriter};
 use std::net::SocketAddr;
 use std::path::Path;
-use time::OffsetDateTime;
 
 pub(crate) struct FilesystemLogger {
 	data_dir: String,
@@ -25,7 +28,10 @@ impl Logger for FilesystemLogger {
 		let raw_log = record.args.to_string();
 		let log = format!(
 			"{} {:<5} [{}:{}] {}\n",
-			OffsetDateTime::now_utc().format("%F %T"),
+			// Note that a "real" lightning node almost certainly does *not* want subsecond
+			// precision for message-receipt information as it makes log entries a target for
+			// deanonymization attacks. For testing, however, its quite useful.
+			Utc::now().format("%Y-%m-%d %H:%M:%S%.3f"),
 			record.level.to_string(),
 			record.module_path,
 			record.line,
@@ -65,3 +71,47 @@ pub(crate) fn read_channel_peer_data(
 	}
 	Ok(peer_data)
 }
+
+pub(crate) fn persist_network(path: &Path, network_graph: &NetworkGraph) -> std::io::Result<()> {
+	let mut tmp_path = path.to_path_buf().into_os_string();
+	tmp_path.push(".tmp");
+	let file = fs::OpenOptions::new().write(true).create(true).open(&tmp_path)?;
+	let write_res = network_graph.write(&mut BufWriter::new(file));
+	if let Err(e) = write_res.and_then(|_| fs::rename(&tmp_path, path)) {
+		let _ = fs::remove_file(&tmp_path);
+		Err(e)
+	} else {
+		Ok(())
+	}
+}
+
+pub(crate) fn read_network(path: &Path, genesis_hash: BlockHash) -> NetworkGraph {
+	if let Ok(file) = File::open(path) {
+		if let Ok(graph) = NetworkGraph::read(&mut BufReader::new(file)) {
+			return graph;
+		}
+	}
+	NetworkGraph::new(genesis_hash)
+}
+
+pub(crate) fn persist_scorer(path: &Path, scorer: &Scorer) -> std::io::Result<()> {
+	let mut tmp_path = path.to_path_buf().into_os_string();
+	tmp_path.push(".tmp");
+	let file = fs::OpenOptions::new().write(true).create(true).open(&tmp_path)?;
+	let write_res = scorer.write(&mut BufWriter::new(file));
+	if let Err(e) = write_res.and_then(|_| fs::rename(&tmp_path, path)) {
+		let _ = fs::remove_file(&tmp_path);
+		Err(e)
+	} else {
+		Ok(())
+	}
+}
+
+pub(crate) fn read_scorer(path: &Path) -> Scorer {
+	if let Ok(file) = File::open(path) {
+		if let Ok(scorer) = Scorer::read(&mut BufReader::new(file)) {
+			return scorer;
+		}
+	}
+	Scorer::default()
+}