[bug] Set default fees for commit transaction in case Core fee estimation fails

src/commit.rs

@@ -185,7 +185,10 @@ fn commit_new_transaction(
     };
 
     let daemon = DAEMON.get().unwrap().lock_anyhow()?;
-    let fee_rate = daemon.estimate_fee(6)?;
+    let fee_rate = daemon.estimate_fee(6)
+        .unwrap_or(Amount::from_sat(1000))
+        .checked_div(1000)
+        .unwrap();
 
     let freezed_utxos = lock_freezed_utxos()?;