diff --git a/swap/src/asb/tracing.rs b/swap/src/asb/tracing.rs
index c21c1e70..3393cee3 100644
--- a/swap/src/asb/tracing.rs
+++ b/swap/src/asb/tracing.rs
@@ -1,18 +1,28 @@
+use std::path::Path;
+
 use anyhow::Result;
 use tracing_subscriber::filter::LevelFilter;
 use tracing_subscriber::fmt::time::UtcTime;
+use tracing_subscriber::fmt::writer::MakeWriterExt;
 use tracing_subscriber::FmtSubscriber;
 
-pub fn init(level: LevelFilter, json_format: bool, timestamp: bool) -> Result<()> {
+pub fn init(
+    level: LevelFilter,
+    json_format: bool,
+    timestamp: bool,
+    dir: impl AsRef<Path>,
+) -> Result<()> {
     if level == LevelFilter::OFF {
         return Ok(());
     }
 
     let is_terminal = atty::is(atty::Stream::Stderr);
 
+    let appender = tracing_appender::rolling::never(dir.as_ref(), "swap-all.log");
+
     let builder = FmtSubscriber::builder()
         .with_env_filter(format!("asb={},swap={}", level, level))
-        .with_writer(std::io::stderr)
+        .with_writer(appender.and(std::io::stderr))
         .with_ansi(is_terminal)
         .with_timer(UtcTime::rfc_3339())
         .with_target(false);
diff --git a/swap/src/bin/asb.rs b/swap/src/bin/asb.rs
index 0f2f13b5..7f7b3bf2 100644
--- a/swap/src/bin/asb.rs
+++ b/swap/src/bin/asb.rs
@@ -31,6 +31,7 @@ use swap::asb::config::{
 use swap::asb::{cancel, punish, redeem, refund, safely_abort, EventLoop, Finality, KrakenRate};
 use swap::common::check_latest_version;
 use swap::database::{open_db, AccessMode};
+use swap::fs::system_data_dir;
 use swap::network::rendezvous::XmrBtcNamespace;
 use swap::network::swarm;
 use swap::protocol::alice::{run, AliceState};
@@ -72,7 +73,9 @@ async fn main() -> Result<()> {
         eprintln!("{}", e);
     }
 
-    asb::tracing::init(LevelFilter::DEBUG, json, !disable_timestamp).expect("initialize tracing");
+    let log_dir = system_data_dir()?.join("logs");
+    asb::tracing::init(LevelFilter::DEBUG, json, !disable_timestamp, log_dir)
+        .expect("initialize tracing");
 
     let config = match read_config(config_path.clone())? {
         Ok(config) => config,
diff --git a/swap/src/proptest.rs b/swap/src/proptest.rs
index 7ad8fb9a..61b6db65 100644
--- a/swap/src/proptest.rs
+++ b/swap/src/proptest.rs
@@ -2,7 +2,7 @@ use proptest::prelude::*;
 
 pub mod ecdsa_fun {
     use super::*;
-    use ::ecdsa_fun::fun::{Point, Scalar, G};
+    use ecdsa_fun::fun::{Point, Scalar, G};
 
     pub fn point() -> impl Strategy<Value = Point> {
         scalar().prop_map(|mut scalar| Point::even_y_from_scalar_mul(G, &mut scalar).normalize())
@@ -17,8 +17,8 @@ pub mod ecdsa_fun {
 
 pub mod bitcoin {
     use super::*;
-    use ::bitcoin::util::bip32::ExtendedPrivKey;
-    use ::bitcoin::Network;
+    use bitcoin::util::bip32::ExtendedPrivKey;
+    use bitcoin::Network;
 
     pub fn extended_priv_key() -> impl Strategy<Value = ExtendedPrivKey> {
         prop::array::uniform8(0..255u8).prop_filter_map("invalid secret key generated", |bytes| {
diff --git a/swap/src/seed.rs b/swap/src/seed.rs
index aa363905..a17a7964 100644
--- a/swap/src/seed.rs
+++ b/swap/src/seed.rs
@@ -1,9 +1,9 @@
 use crate::fs::ensure_directory_exists;
-use ::bitcoin::secp256k1::constants::SECRET_KEY_SIZE;
-use ::bitcoin::secp256k1::{self, SecretKey};
 use anyhow::{Context, Result};
 use bdk::bitcoin::util::bip32::ExtendedPrivKey;
 use bitcoin::hashes::{sha256, Hash, HashEngine};
+use bitcoin::secp256k1::constants::SECRET_KEY_SIZE;
+use bitcoin::secp256k1::{self, SecretKey};
 use libp2p::identity;
 use pem::{encode, Pem};
 use rand::prelude::*;