fix ssl handshake issue

src/main/java/com/sparrowwallet/sparrow/io/ExchangeSource.java

@@ -5,6 +5,8 @@ import com.sparrowwallet.sparrow.event.ExchangeRatesUpdatedEvent;
 import javafx.concurrent.ScheduledService;
 import javafx.concurrent.Service;
 import javafx.concurrent.Task;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 import java.io.InputStream;
 import java.io.InputStreamReader;
@@ -51,6 +53,7 @@ public enum ExchangeSource {
                 Gson gson = new Gson();
                 return gson.fromJson(reader, CoinbaseRates.class);
             } catch (Exception e) {
+                log.error("Error retrieving currency rates", e);
                 return new CoinbaseRates();
             }
         }
@@ -80,11 +83,14 @@ public enum ExchangeSource {
                 Gson gson = new Gson();
                 return gson.fromJson(reader, CoinGeckoRates.class);
             } catch (Exception e) {
+                log.error("Error retrieving currency rates", e);
                 return new CoinGeckoRates();
             }
         }
     };
 
+    private static final Logger log = LoggerFactory.getLogger(ExchangeSource.class);
+
     private final String name;
 
     ExchangeSource(String name) {

src/main/java/com/sparrowwallet/sparrow/preferences/GeneralPreferencesController.java

@@ -11,11 +11,15 @@ import javafx.beans.value.ChangeListener;
 import javafx.beans.value.ObservableValue;
 import javafx.fxml.FXML;
 import javafx.scene.control.ComboBox;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 import java.util.Currency;
 import java.util.List;
 
 public class GeneralPreferencesController extends PreferencesDetailController {
+    private static final Logger log = LoggerFactory.getLogger(GeneralPreferencesController.class);
+
     @FXML
     private ComboBox<BitcoinUnit> bitcoinUnit;
 
@@ -81,6 +85,9 @@ public class GeneralPreferencesController extends PreferencesDetailController {
         currenciesService.setOnSucceeded(event -> {
             updateCurrencies(currenciesService.getValue());
         });
+        currenciesService.setOnFailed(event -> {
+            log.error("Error retrieving currencies", event.getSource().getException());
+        });
         currenciesService.start();
     }