export all related wallets when exporting to electrum personal server

src/main/java/com/sparrowwallet/sparrow/control/FileWalletExportPane.java

@@ -82,7 +82,7 @@ public class FileWalletExportPane extends TitledDescriptionPane {
         fileChooser.setTitle("Export " + exporter.getWalletModel().toDisplayString() + " File");
         String extension = exporter.getExportFileExtension(wallet);
         String fileName = wallet.getFullName() + "-" + exporter.getWalletModel().toDisplayString().toLowerCase(Locale.ROOT).replace(" ", "");
-        if(exporter instanceof Sparrow) {
+        if(exporter.exportsAllWallets()) {
             fileName = wallet.getMasterName();
         }
         fileChooser.setInitialFileName(fileName + (extension == null || extension.isEmpty() ? "" : "." + extension));

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

@@ -4,18 +4,20 @@ import com.sparrowwallet.drongo.ExtendedKey;
 import com.sparrowwallet.drongo.KeyPurpose;
 import com.sparrowwallet.drongo.policy.PolicyType;
 import com.sparrowwallet.drongo.protocol.ScriptType;
-import com.sparrowwallet.drongo.wallet.Keystore;
-import com.sparrowwallet.drongo.wallet.Wallet;
-import com.sparrowwallet.drongo.wallet.WalletModel;
-import com.sparrowwallet.drongo.wallet.WalletNode;
+import com.sparrowwallet.drongo.wallet.*;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 import java.io.BufferedWriter;
+import java.io.IOException;
 import java.io.OutputStream;
 import java.io.OutputStreamWriter;
 import java.nio.charset.StandardCharsets;
 import java.util.Iterator;
 
 public class ElectrumPersonalServer implements WalletExport {
+    private static final Logger log = LoggerFactory.getLogger(ElectrumPersonalServer.class);
+
     @Override
     public String getName() {
         return "Electrum Personal Server";
@@ -37,6 +39,24 @@ public class ElectrumPersonalServer implements WalletExport {
             writer.write("# Electrum Personal Server configuration file fragments\n");
             writer.write("# Copy the lines below into the relevant sections in your EPS config.ini file\n\n");
             writer.write("# Copy into [master-public-keys] section\n");
+            Wallet masterWallet = wallet.isMasterWallet() ? wallet : wallet.getMasterWallet();
+            writeWalletXpub(masterWallet, writer);
+            for(Wallet childWallet : masterWallet.getChildWallets()) {
+                if(!childWallet.isNested()) {
+                    writeWalletXpub(childWallet, writer);
+                }
+            }
+
+            writeBip47Addresses(masterWallet, writer);
+
+            writer.flush();
+        } catch(Exception e) {
+            log.error("Could not export EPS wallet", e);
+            throw new ExportException("Could not export EPS wallet", e);
+        }
+    }
+
+    private static void writeWalletXpub(Wallet wallet, BufferedWriter writer) throws IOException {
         writer.write(wallet.getFullName().replace(' ', '_') + " = ");
 
         ExtendedKey.Header xpubHeader = ExtendedKey.Header.fromScriptType(wallet.getScriptType(), false);
@@ -54,7 +74,9 @@ public class ElectrumPersonalServer implements WalletExport {
         }
 
         writer.newLine();
+    }
 
+    private static void writeBip47Addresses(Wallet wallet, BufferedWriter writer) throws IOException {
         if(wallet.hasPaymentCode()) {
             writer.write("\n# Copy into [watch-only-addresses] section\n");
             WalletNode notificationNode = wallet.getNotificationWallet().getNode(KeyPurpose.NOTIFICATION);
@@ -85,11 +107,6 @@ public class ElectrumPersonalServer implements WalletExport {
 
             writer.write("\n# Important: If this wallet receives any BIP47 payments, redo this export");
         }
-
-            writer.flush();
-        } catch(Exception e) {
-            throw new ExportException("Could not export wallet", e);
-        }
     }
 
     @Override
@@ -111,4 +128,9 @@ public class ElectrumPersonalServer implements WalletExport {
     public boolean walletExportRequiresDecryption() {
         return false;
     }
+
+    @Override
+    public boolean exportsAllWallets() {
+        return true;
+    }
 }

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

@@ -144,4 +144,9 @@ public class Sparrow implements WalletImport, WalletExport {
     public boolean isWalletImportScannable() {
         return false;
     }
+
+    @Override
+    public boolean exportsAllWallets() {
+        return true;
+    }
 }

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

@@ -10,4 +10,7 @@ public interface WalletExport extends Export {
     String getExportFileExtension(Wallet wallet);
     boolean isWalletExportScannable();
     boolean walletExportRequiresDecryption();
+    default boolean exportsAllWallets() {
+        return false;
+    }
 }