followup

various db persistence improvements
reduce file reads on db files to avoid locking exception on windows
2026-07-31 03:56:16 +00:00 · 2021-06-16 09:37:35 +02:00 · 2021-06-16 09:35:26 +02:00 · 2021-06-15 17:58:25 +02:00 · 2021-06-15 16:50:05 +02:00 · 2021-06-15 09:31:12 +02:00
149 changed files with 6689 additions and 1075 deletions
@@ -5,7 +5,7 @@ plugins {
    id 'org.beryx.jlink' version '2.22.0'
 }

-def sparrowVersion = '1.4.0'
+def sparrowVersion = '1.4.2'
 def os = org.gradle.internal.os.OperatingSystem.current()
 def osName = os.getFamilyName()
 if(os.macOsX) {
@@ -44,6 +44,13 @@ dependencies {
    }
    implementation('com.google.guava:guava:28.2-jre')
    implementation('com.google.code.gson:gson:2.8.6')
+    implementation('com.h2database:h2:1.4.201-SNAPSHOT')
+    implementation('com.zaxxer:HikariCP:4.0.3')
+    implementation('org.jdbi:jdbi3-core:3.20.0') {
+        exclude group: 'org.slf4j'
+    }
+    implementation('org.jdbi:jdbi3-sqlobject:3.20.0')
+    implementation('org.flywaydb:flyway-core:7.10.5-SNAPSHOT')
    implementation('org.fxmisc.richtext:richtextfx:0.10.4')
    implementation('no.tornado:tornadofx-controls:1.0.4')
    implementation('com.google.zxing:javase:3.4.0')
@@ -60,7 +67,7 @@ dependencies {
    }
    implementation("com.sparrowwallet:netlayer-jpms-${osName}:0.6.8")
    implementation('de.codecentric.centerdevice:centerdevice-nsmenufx:2.1.7')
-    implementation('org.controlsfx:controlsfx:11.0.2' ) {
+    implementation('org.controlsfx:controlsfx:11.1.0' ) {
        exclude group: 'org.openjfx', module: 'javafx-base'
        exclude group: 'org.openjfx', module: 'javafx-graphics'
        exclude group: 'org.openjfx', module: 'javafx-controls'
@@ -105,6 +112,7 @@ run {
                                 "--add-opens=javafx.base/com.sun.javafx.event=org.controlsfx.controls",
                                 "--add-opens=javafx.controls/javafx.scene.control.cell=com.sparrowwallet.sparrow",
                                 "--add-opens=org.controlsfx.controls/impl.org.controlsfx.skin=com.sparrowwallet.sparrow",
+                                 "--add-opens=org.controlsfx.controls/impl.org.controlsfx.skin=javafx.fxml",
                                 "--add-opens=javafx.graphics/com.sun.javafx.tk=centerdevice.nsmenufx",
                                 "--add-opens=javafx.graphics/com.sun.javafx.tk.quantum=centerdevice.nsmenufx",
                                 "--add-opens=javafx.graphics/com.sun.glass.ui=centerdevice.nsmenufx",
@@ -130,6 +138,8 @@ jlink {
        requires 'com.fasterxml.jackson.databind'
        requires 'jdk.crypto.cryptoki'
        requires 'java.management'
+        uses 'org.flywaydb.core.extensibility.FlywayExtension'
+        uses 'org.flywaydb.core.internal.database.DatabaseType'
    }

    options = ['--strip-debug', '--compress', '2', '--no-header-files', '--no-man-pages', '--ignore-signing-information', '--exclude-files', '**.png']
@@ -143,6 +153,7 @@ jlink {
                   "--add-opens=javafx.base/com.sun.javafx.event=org.controlsfx.controls",
                   "--add-opens=javafx.controls/javafx.scene.control.cell=com.sparrowwallet.sparrow",
                   "--add-opens=org.controlsfx.controls/impl.org.controlsfx.skin=com.sparrowwallet.sparrow",
+                   "--add-opens=org.controlsfx.controls/impl.org.controlsfx.skin=javafx.fxml",
                   "--add-opens=javafx.graphics/com.sun.javafx.tk=com.sparrowwallet.merged.module",
                   "--add-opens=javafx.graphics/com.sun.javafx.tk.quantum=com.sparrowwallet.merged.module",
                   "--add-opens=javafx.graphics/com.sun.glass.ui=com.sparrowwallet.merged.module",
@@ -151,7 +162,9 @@ jlink {
                   "--add-opens=javafx.graphics/com.sun.glass.ui=com.sparrowwallet.sparrow",
                   "--add-opens=javafx.graphics/com.sun.javafx.application=com.sparrowwallet.sparrow",
                   "--add-opens=java.base/java.net=com.sparrowwallet.sparrow",
-                   "--add-reads=com.sparrowwallet.merged.module=java.desktop"]
+                   "--add-reads=com.sparrowwallet.merged.module=java.desktop",
+                   "--add-reads=com.sparrowwallet.merged.module=java.sql",
+                   "--add-reads=com.sparrowwallet.merged.module=com.sparrowwallet.sparrow"]

        if(os.macOsX) {
            jvmArgs += "--add-opens=javafx.graphics/com.sun.glass.ui.mac=com.sparrowwallet.merged.module"
@@ -164,9 +177,9 @@ jlink {
        appVersion = "${sparrowVersion}"
        skipInstaller = os.macOsX
        imageOptions = []
-        installerOptions = ['--file-associations', 'src/main/deploy/associations.properties', '--license-file', 'LICENSE']
+        installerOptions = ['--file-associations', 'src/main/deploy/psbt.properties', '--file-associations', 'src/main/deploy/txn.properties', '--file-associations', 'src/main/deploy/bitcoin.properties', '--file-associations', 'src/main/deploy/aopp.properties', '--license-file', 'LICENSE']
        if(os.windows) {
-            installerOptions += ['--win-per-user-install', '--win-dir-chooser', '--win-menu', '--win-shortcut']
+            installerOptions += ['--win-per-user-install', '--win-dir-chooser', '--win-menu', '--win-shortcut', '--resource-dir', 'src/main/deploy/package/windows/']
            imageOptions += ['--icon', 'src/main/deploy/package/windows/sparrow.ico']
            installerType = "exe"
        }
@@ -0,0 +1,2 @@
+mime-type=x-scheme-handler/aopp
+description=Verify Address Ownership URI
@@ -1,3 +0,0 @@
-extension=psbt
-mime-type=application/octet-stream
-description=Partially Signed Bitcoin Transaction
@@ -0,0 +1,2 @@
+mime-type=x-scheme-handler/bitcoin
+description=Bitcoin Scheme URI
@@ -0,0 +1,9 @@
+[Desktop Entry]
+Name=Sparrow
+Comment=Sparrow
+Exec=/opt/sparrow/bin/Sparrow %U
+Icon=/opt/sparrow/lib/Sparrow.png
+Terminal=false
+Type=Application
+Categories=Unknown
+MimeType=application/psbt;application/bitcoin-transaction;x-scheme-handler/bitcoin;x-scheme-handler/aopp
@@ -21,7 +21,7 @@
  <key>CFBundlePackageType</key>
  <string>APPL</string>
  <key>CFBundleShortVersionString</key>
-  <string>1.4.0</string>
+  <string>1.4.2</string>
  <key>CFBundleSignature</key>
  <string>????</string>
  <!-- See https://developer.apple.com/app-store/categories/ for list of AppStore categories -->
@@ -35,5 +35,88 @@
  <string>true</string>
  <key>NSCameraUsageDescription</key>
  <string>Sparrow requires access to the camera in order to scan QR codes</string>
+  <key>CFBundleURLTypes</key>
+  <array>
+      <dict>
+          <key>CFBundleURLName</key>
+          <string>com.sparrowwallet.sparrow.bitcoin</string>
+          <key>CFBundleURLSchemes</key>
+          <array>
+            <string>bitcoin</string>
+          </array>
+      </dict>
+      <dict>
+          <key>CFBundleURLName</key>
+          <string>com.sparrowwallet.sparrow.aopp</string>
+          <key>CFBundleURLSchemes</key>
+          <array>
+            <string>aopp</string>
+          </array>
+      </dict>
+  </array>
+  <key>UTImportedTypeDeclarations</key>
+  <array>
+      <dict>
+          <key>UTTypeIdentifier</key>
+          <string>org.bitcoin.psbt</string>
+          <key>UTTypeTagSpecification</key>
+          <dict>
+              <key>public.filename-extension</key>
+              <array>
+                  <string>psbt</string>
+              </array>
+          </dict>
+          <key>UTTypeDescription</key>
+          <string>Partially Signed Bitcoin Transaction</string>
+          <key>UTTypeIconFile</key>
+          <string>sparrow.icns</string>
+      </dict>
+      <dict>
+          <key>UTTypeIdentifier</key>
+          <string>org.bitcoin.txn</string>
+          <key>UTTypeTagSpecification</key>
+          <dict>
+              <key>public.filename-extension</key>
+              <array>
+                  <string>txn</string>
+              </array>
+          </dict>
+          <key>UTTypeDescription</key>
+          <string>Bitcoin Transaction</string>
+          <key>UTTypeIconFile</key>
+          <string>sparrow.icns</string>
+      </dict>
+  </array>
+ <key>CFBundleDocumentTypes</key>
+ <array>
+     <dict>
+        <key>CFBundleTypeRole</key>
+        <string>Editor</string>
+        <key>CFBundleTypeIconFile</key>
+        <string>sparrow.icns</string>
+        <key>CFBundleTypeExtensions</key>
+        <array>
+            <string>psbt</string>
+        </array>
+        <key>CFBundleTypeName</key>
+        <string>Partially Signed Bitcoin Transaction</string>
+        <key>LSHandlerRank</key>
+        <string>Default</string>
+     </dict>
+     <dict>
+        <key>CFBundleTypeRole</key>
+        <string>Editor</string>
+        <key>CFBundleTypeIconFile</key>
+        <string>sparrow.icns</string>
+        <key>CFBundleTypeExtensions</key>
+        <array>
+            <string>txn</string>
+        </array>
+        <key>CFBundleTypeName</key>
+        <string>Bitcoin Transaction</string>
+        <key>LSHandlerRank</key>
+        <string>Default</string>
+     </dict>
+ </array>
 </dict>
 </plist>
@@ -0,0 +1,163 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Wix xmlns="http://schemas.microsoft.com/wix/2006/wi"
+     xmlns:util="http://schemas.microsoft.com/wix/UtilExtension">
+
+  <?ifdef JpIsSystemWide ?>
+    <?define JpInstallScope="perMachine"?>
+  <?else?>
+    <?define JpInstallScope="perUser"?>
+  <?endif?>
+
+  <?define JpProductLanguage=1033 ?>
+  <?define JpInstallerVersion=200 ?>
+  <?define JpCompressedMsi=yes ?>
+
+  <?include $(var.JpConfigDir)/overrides.wxi ?>
+
+  <Product
+    Id="$(var.JpProductCode)"
+    Name="$(var.JpAppName)"
+    Language="$(var.JpProductLanguage)"
+    Version="$(var.JpAppVersion)"
+    Manufacturer="$(var.JpAppVendor)"
+    UpgradeCode="$(var.JpProductUpgradeCode)">
+
+    <Package
+      Description="$(var.JpAppDescription)"
+      Manufacturer="$(var.JpAppVendor)"
+      InstallerVersion="$(var.JpInstallerVersion)"
+      Compressed="$(var.JpCompressedMsi)"
+      InstallScope="$(var.JpInstallScope)" Platform="x64"
+    />
+
+    <Media Id="1" Cabinet="Data.cab" EmbedCab="yes" />
+
+    <?ifdef JpAllowDowngrades ?>
+    <?ifdef JpAllowUpgrades ?>
+    <MajorUpgrade
+      AllowDowngrades="yes"
+      Disallow="no"
+    />
+    <?endif?>
+    <?endif?>
+
+    <?ifdef JpAllowDowngrades ?>
+    <?ifndef JpAllowUpgrades ?>
+    <MajorUpgrade
+      AllowDowngrades="yes"
+      Disallow="yes"
+      DisallowUpgradeErrorMessage="!(loc.DisallowUpgradeErrorMessage)"
+    />
+    <?endif?>
+    <?endif?>
+
+    <?ifndef JpAllowDowngrades ?>
+    <?ifdef JpAllowUpgrades ?>
+    <MajorUpgrade
+      AllowDowngrades="no"
+      Disallow="no"
+      DowngradeErrorMessage="!(loc.DowngradeErrorMessage)"
+    />
+    <?endif?>
+    <?endif?>
+
+    <?ifndef JpAllowDowngrades ?>
+    <?ifndef JpAllowUpgrades ?>
+    <MajorUpgrade
+      AllowDowngrades="no"
+      Disallow="yes"
+      DowngradeErrorMessage="!(loc.DowngradeErrorMessage)"
+      DisallowUpgradeErrorMessage="!(loc.DisallowUpgradeErrorMessage)"
+    />
+    <?endif?>
+    <?endif?>
+
+    <!-- Standard required root -->
+    <Directory Id="TARGETDIR" Name="SourceDir"/>
+
+    <DirectoryRef Id="TARGETDIR">
+        <Component Id="RegistryEntries" Guid="{206C911C-56EF-44B8-9257-5FD214427965}">
+            <RegistryKey Root="HKCR" Key="aopp" Action="createAndRemoveOnUninstall">
+                <RegistryValue Type="string" Name="URL Protocol" Value=""/>
+                <RegistryValue Type="string" Value="URL:Address Ownership Proof Protocol"/>
+                <RegistryKey Key="DefaultIcon">
+                    <RegistryValue Type="string" Value="$(var.JpAppName).exe" />
+                </RegistryKey>
+                <RegistryKey Key="shell\open\command">
+                    <RegistryValue Type="string" Value="&quot;[INSTALLDIR]$(var.JpAppName).exe&quot; &quot;%1&quot;" />
+                </RegistryKey>
+            </RegistryKey>
+            <RegistryKey Root="HKCR" Key="bitcoin" Action="createAndRemoveOnUninstall">
+                <RegistryValue Type="string" Name="URL Protocol" Value=""/>
+                <RegistryValue Type="string" Value="URL:Bitcoin Payment URL"/>
+                <RegistryKey Key="DefaultIcon">
+                    <RegistryValue Type="string" Value="$(var.JpAppName).exe" />
+                </RegistryKey>
+                <RegistryKey Key="shell\open\command">
+                    <RegistryValue Type="string" Value="&quot;[INSTALLDIR]$(var.JpAppName).exe&quot; &quot;%1&quot;" />
+                </RegistryKey>
+            </RegistryKey>
+        </Component>
+    </DirectoryRef>
+
+    <Feature Id="DefaultFeature" Title="!(loc.MainFeatureTitle)" Level="1">
+      <ComponentGroupRef Id="Shortcuts"/>
+      <ComponentGroupRef Id="Files"/>
+      <ComponentGroupRef Id="FileAssociations"/>
+      <ComponentRef Id="RegistryEntries"/>
+    </Feature>
+
+    <?ifdef JpInstallDirChooser ?>
+    <Binary Id="JpCaDll" SourceFile="wixhelper.dll"/>
+    <CustomAction Id="JpCheckInstallDir" BinaryKey="JpCaDll" DllEntry="CheckInstallDir" />
+    <?endif?>
+
+    <UI>
+      <?ifdef JpInstallDirChooser ?>
+      <Dialog Id="JpInvalidInstallDir" Width="300" Height="85" Title="[ProductName] Setup" NoMinimize="yes">
+        <Control Id="JpInvalidInstallDirYes" Type="PushButton" X="100" Y="55" Width="50" Height="15" Default="no" Cancel="no" Text="Yes">
+          <Publish Event="NewDialog" Value="VerifyReadyDlg">1</Publish>
+        </Control>
+        <Control Id="JpInvalidInstallDirNo" Type="PushButton" X="150" Y="55" Width="50" Height="15" Default="yes" Cancel="yes" Text="No">
+          <Publish Event="NewDialog" Value="InstallDirDlg">1</Publish>
+        </Control>
+        <Control Id="Text" Type="Text" X="25" Y="15" Width="250" Height="30" TabSkip="no">
+          <Text>!(loc.message.install.dir.exist)</Text>
+        </Control>
+      </Dialog>
+
+      <!--
+        Run WixUI_InstallDir dialog in the default install directory.
+      -->
+      <Property Id="WIXUI_INSTALLDIR" Value="INSTALLDIR"/>
+      <UIRef Id="WixUI_InstallDir" />
+
+      <Publish Dialog="InstallDirDlg" Control="Next" Event="DoAction" Value="JpCheckInstallDir" Order="3">1</Publish>
+      <Publish Dialog="InstallDirDlg" Control="Next" Event="NewDialog" Value="JpInvalidInstallDir" Order="5">INSTALLDIR_VALID="0"</Publish>
+      <Publish Dialog="InstallDirDlg" Control="Next" Event="NewDialog" Value="VerifyReadyDlg" Order="5">INSTALLDIR_VALID="1"</Publish>
+
+      <?ifndef JpLicenseRtf ?>
+      <!--
+        No license file provided.
+        Override the dialog sequence in built-in dialog set "WixUI_InstallDir"
+        to exclude license dialog.
+      -->
+      <Publish Dialog="WelcomeDlg" Control="Next" Event="NewDialog" Value="InstallDirDlg" Order="2">1</Publish>
+      <Publish Dialog="InstallDirDlg" Control="Back" Event="NewDialog" Value="WelcomeDlg" Order="2">1</Publish>
+      <?endif?>
+
+      <?else?>
+
+      <?ifdef JpLicenseRtf ?>
+      <UIRef Id="WixUI_Minimal" />
+      <?endif?>
+
+      <?endif?>
+    </UI>
+
+    <?ifdef JpLicenseRtf ?>
+    <WixVariable Id="WixUILicenseRtf" Value="$(var.JpLicenseRtf)"/>
+    <?endif?>
+
+  </Product>
+</Wix>
@@ -0,0 +1,3 @@
+mime-type=application/psbt
+extension=psbt
+description=Partially Signed Bitcoin Transaction
@@ -0,0 +1,3 @@
+mime-type=application/bitcoin-transaction
+extension=txn
+description=Bitcoin Transaction
@@ -12,7 +12,7 @@ public class AboutController {
    private Label title;

    public void initializeView() {
-        title.setText(MainApp.APP_NAME + " " + MainApp.APP_VERSION);
+        title.setText(MainApp.APP_NAME + " " + MainApp.APP_VERSION + MainApp.APP_VERSION_SUFFIX);
    }

    public void setStage(Stage stage) {
@@ -18,6 +18,7 @@ import com.sparrowwallet.drongo.protocol.Transaction;
 import com.sparrowwallet.drongo.psbt.PSBT;
 import com.sparrowwallet.drongo.psbt.PSBTInput;
 import com.sparrowwallet.drongo.psbt.PSBTParseException;
+import com.sparrowwallet.drongo.psbt.PSBTSignatureException;
 import com.sparrowwallet.drongo.wallet.*;
 import com.sparrowwallet.sparrow.control.*;
 import com.sparrowwallet.sparrow.event.*;
@@ -87,6 +88,9 @@ public class AppController implements Initializable {
    @FXML
    private Menu savePSBT;

+    @FXML
+    private MenuItem savePSBTBinary;
+
    @FXML
    private MenuItem exportWallet;

@@ -120,6 +124,12 @@ public class AppController implements Initializable {
    @FXML
    private CheckMenuItem useHdCameraResolution;

+    @FXML
+    private CheckMenuItem showLoadingLog;
+
+    @FXML
+    private CheckMenuItem showUtxosChart;
+
    @FXML
    private CheckMenuItem showTxHex;

@@ -129,6 +139,9 @@ public class AppController implements Initializable {
    @FXML
    private MenuItem refreshWallet;

+    @FXML
+    private MenuItem sendToMany;
+
    @FXML
    private StackPane rootStack;

@@ -167,11 +180,7 @@ public class AppController implements Initializable {
            boolean success = false;
            if(db.hasFiles()) {
                for(File file : db.getFiles()) {
-                    if(isWalletFile(file)) {
-                        openWalletFile(file, true);
-                    } else {
-                        openTransactionFile(file);
-                    }
+                    openFile(file);
                }
                success = true;
            }
@@ -227,6 +236,8 @@ public class AppController implements Initializable {
                if(tabs.getTabs().isEmpty()) {
                    Stage tabStage = (Stage)tabs.getScene().getWindow();
                    tabStage.setTitle("Sparrow");
+                    saveTransaction.setVisible(true);
+                    saveTransaction.setDisable(true);
                }
            }
        });
@@ -259,9 +270,14 @@ public class AppController implements Initializable {
        hideEmptyUsedAddresses.setSelected(Config.get().isHideEmptyUsedAddresses());
        useHdCameraResolution.setSelected(Config.get().isHdCapture());
        showTxHex.setSelected(Config.get().isShowTransactionHex());
+        showLoadingLog.setSelected(Config.get().isShowLoadingLog());
+        showUtxosChart.setSelected(Config.get().isShowUtxosChart());
+        saveTransaction.setDisable(true);
        savePSBT.visibleProperty().bind(saveTransaction.visibleProperty().not());
+        savePSBTBinary.disableProperty().bind(saveTransaction.visibleProperty());
        exportWallet.setDisable(true);
        refreshWallet.disableProperty().bind(Bindings.or(exportWallet.disableProperty(), Bindings.or(serverToggle.disableProperty(), AppServices.onlineProperty().not())));
+        sendToMany.disableProperty().bind(exportWallet.disableProperty());

        setServerType(Config.get().getServerType());
        serverToggle.setSelected(isConnected());
@@ -311,7 +327,7 @@ public class AppController implements Initializable {
        }
    }

-    public void showDocumentation(ActionEvent event) throws IOException {
+    public void showDocumentation(ActionEvent event) {
        AppServices.get().getApplication().getHostServices().showDocument("https://sparrowwallet.com/docs");
    }

@@ -324,7 +340,7 @@ public class AppController implements Initializable {
        }
    }

-    public void submitBugReport(ActionEvent event) throws IOException {
+    public void submitBugReport(ActionEvent event) {
        AppServices.get().getApplication().getHostServices().showDocument("https://sparrowwallet.com/submitbugreport");
    }

@@ -343,7 +359,9 @@ public class AppController implements Initializable {
            stage.setTitle("About " + MainApp.APP_NAME);
            stage.initStyle(org.controlsfx.tools.Platform.getCurrent() == org.controlsfx.tools.Platform.OSX ? StageStyle.UNDECORATED : StageStyle.DECORATED);
            stage.setResizable(false);
-            stage.setScene(new Scene(root));
+            Scene scene = new Scene(root);
+            AppServices.onEscapePressed(scene, stage::close);
+            stage.setScene(scene);
            controller.setStage(stage);
            controller.initializeView();
            setStageIcon(stage);
@@ -432,7 +450,7 @@ public class AppController implements Initializable {
                showErrorDialog("Invalid PSBT", e.getMessage());
            } catch(TransactionParseException e) {
                showErrorDialog("Invalid transaction", e.getMessage());
-            } catch(ParseException e) {
+            } catch(Exception e) {
                showErrorDialog("Invalid file", e.getMessage());
            }
        }
@@ -664,6 +682,18 @@ public class AppController implements Initializable {
        Config.get().setHdCapture(item.isSelected());
    }

+    public void showLoadingLog(ActionEvent event) {
+        CheckMenuItem item = (CheckMenuItem)event.getSource();
+        Config.get().setShowLoadingLog(item.isSelected());
+        EventManager.get().post(new LoadingLogChangedEvent(item.isSelected()));
+    }
+
+    public void showUtxosChart(ActionEvent event) {
+        CheckMenuItem item = (CheckMenuItem)event.getSource();
+        Config.get().setShowUtxosChart(item.isSelected());
+        EventManager.get().post(new UtxosChartChangedEvent(item.isSelected()));
+    }
+
    public void showTxHex(ActionEvent event) {
        CheckMenuItem item = (CheckMenuItem)event.getSource();
        Config.get().setShowTransactionHex(item.isSelected());
@@ -677,9 +707,12 @@ public class AppController implements Initializable {
        EventManager.get().post(new BitcoinUnitChangedEvent(unit));
    }

-    private boolean isWalletFile(File file) {
-        FileType fileType = IOUtils.getFileType(file);
-        return FileType.JSON.equals(fileType) || FileType.BINARY.equals(fileType);
+    public void openFile(File file) {
+        if(isWalletFile(file)) {
+            openWalletFile(file, true);
+        } else {
+            openTransactionFile(file);
+        }
    }

    private void setServerToggleTooltip(Integer currentBlockHeight) {
@@ -729,17 +762,11 @@ public class AppController implements Initializable {
    public void openWalletFile(File file, boolean forceSameWindow) {
        try {
            Storage storage = new Storage(file);
-            FileType fileType = IOUtils.getFileType(file);
-            if(FileType.JSON.equals(fileType)) {
-                Storage.WalletBackupAndKey walletBackupAndKey = storage.loadWallet();
-                checkWalletNetwork(walletBackupAndKey.wallet);
-                restorePublicKeysFromSeed(walletBackupAndKey.wallet, null);
-                if(!walletBackupAndKey.wallet.isValid()) {
-                    throw new IllegalStateException("Wallet file is not valid.");
-                }
-                addWalletTabOrWindow(storage, walletBackupAndKey.wallet, walletBackupAndKey.backupWallet, forceSameWindow);
-            } else if(FileType.BINARY.equals(fileType)) {
-                WalletPasswordDialog dlg = new WalletPasswordDialog(file.getName(), WalletPasswordDialog.PasswordRequirement.LOAD);
+            if(!storage.isEncrypted()) {
+                WalletBackupAndKey walletBackupAndKey = storage.loadUnencryptedWallet();
+                openWallet(storage, walletBackupAndKey, this, forceSameWindow);
+            } else {
+                WalletPasswordDialog dlg = new WalletPasswordDialog(storage.getWalletName(null), WalletPasswordDialog.PasswordRequirement.LOAD);
                Optional<SecureString> optionalPassword = dlg.showAndWait();
                if(optionalPassword.isEmpty()) {
                    return;
@@ -748,20 +775,12 @@ public class AppController implements Initializable {
                SecureString password = optionalPassword.get();
                Storage.LoadWalletService loadWalletService = new Storage.LoadWalletService(storage, password);
                loadWalletService.setOnSucceeded(workerStateEvent -> {
-                    EventManager.get().post(new StorageEvent(storage.getWalletFile(), TimedEvent.Action.END, "Done"));
-                    Storage.WalletBackupAndKey walletBackupAndKey = loadWalletService.getValue();
-                    try {
-                        checkWalletNetwork(walletBackupAndKey.wallet);
-                        restorePublicKeysFromSeed(walletBackupAndKey.wallet, walletBackupAndKey.key);
-                        addWalletTabOrWindow(storage, walletBackupAndKey.wallet, walletBackupAndKey.backupWallet, forceSameWindow);
-                    } catch(Exception e) {
-                        showErrorDialog("Error Opening Wallet", e.getMessage());
-                    } finally {
-                        walletBackupAndKey.key.clear();
-                    }
+                    EventManager.get().post(new StorageEvent(storage.getWalletId(null), TimedEvent.Action.END, "Done"));
+                    WalletBackupAndKey walletBackupAndKey = loadWalletService.getValue();
+                    openWallet(storage, walletBackupAndKey, this, forceSameWindow);
                });
                loadWalletService.setOnFailed(workerStateEvent -> {
-                    EventManager.get().post(new StorageEvent(storage.getWalletFile(), TimedEvent.Action.END, "Failed"));
+                    EventManager.get().post(new StorageEvent(storage.getWalletId(null), TimedEvent.Action.END, "Failed"));
                    Throwable exception = loadWalletService.getException();
                    if(exception instanceof InvalidPasswordException) {
                        Optional<ButtonType> optResponse = showErrorDialog("Invalid Password", "The wallet password was invalid. Try again?", ButtonType.CANCEL, ButtonType.OK);
@@ -776,11 +795,11 @@ public class AppController implements Initializable {
                        password.clear();
                    }
                });
-                EventManager.get().post(new StorageEvent(storage.getWalletFile(), TimedEvent.Action.START, "Decrypting wallet..."));
+                EventManager.get().post(new StorageEvent(storage.getWalletId(null), TimedEvent.Action.START, "Decrypting wallet..."));
                loadWalletService.start();
-            } else {
-                throw new IOException("Unsupported file type");
            }
+        } catch(StorageException e) {
+            showErrorDialog("Error Opening Wallet", e.getMessage());
        } catch(Exception e) {
            if(!attemptImportWallet(file, null)) {
                log.error("Error opening wallet", e);
@@ -789,6 +808,26 @@ public class AppController implements Initializable {
        }
    }

+    private void openWallet(Storage storage, WalletBackupAndKey walletBackupAndKey, AppController appController, boolean forceSameWindow) {
+        try {
+            checkWalletNetwork(walletBackupAndKey.getWallet());
+            restorePublicKeysFromSeed(walletBackupAndKey.getWallet(), walletBackupAndKey.getKey());
+            if(!walletBackupAndKey.getWallet().isValid()) {
+                throw new IllegalStateException("Wallet file is not valid.");
+            }
+            AppController walletAppController = appController.addWalletTabOrWindow(storage, walletBackupAndKey.getWallet(), walletBackupAndKey.getBackupWallet(), forceSameWindow);
+            for(Map.Entry<Storage, WalletBackupAndKey> entry : walletBackupAndKey.getChildWallets().entrySet()) {
+                openWallet(entry.getKey(), entry.getValue(), walletAppController, true);
+            }
+            Platform.runLater(() -> selectTab(walletBackupAndKey.getWallet()));
+        } catch(Exception e) {
+            log.error("Error opening wallet", e);
+            showErrorDialog("Error Opening Wallet", e.getMessage());
+        } finally {
+            walletBackupAndKey.clear();
+        }
+    }
+
    private void checkWalletNetwork(Wallet wallet) {
        if(wallet.getNetwork() != null && wallet.getNetwork() != Network.get()) {
            throw new IllegalStateException("Provided " + wallet.getNetwork() + " wallet is invalid on a " + Network.get() + " network. Use a " + wallet.getNetwork() + " configuration to load this wallet.");
@@ -857,7 +896,8 @@ public class AppController implements Initializable {
                new Electrum(),
                new SpecterDesktop(),
                new CoboVaultSinglesig(), new CoboVaultMultisig(),
-                new PassportSinglesig());
+                new PassportSinglesig(),
+                new KeystoneSinglesig(), new KeystoneMultisig());
        for(WalletImport importer : walletImporters) {
            try(FileInputStream inputStream = new FileInputStream(file)) {
                if(importer.isEncrypted(file) && password == null) {
@@ -926,12 +966,17 @@ public class AppController implements Initializable {
        Optional<SecureString> password = dlg.showAndWait();
        if(password.isPresent()) {
            if(password.get().length() == 0) {
-                storage.setEncryptionPubKey(Storage.NO_PASSWORD_KEY);
-                addWalletTabOrWindow(storage, wallet, null, false);
+                try {
+                    storage.setEncryptionPubKey(Storage.NO_PASSWORD_KEY);
+                    storage.saveWallet(wallet);
+                    addWalletTabOrWindow(storage, wallet, null, false);
+                } catch(IOException | StorageException e) {
+                    log.error("Error saving imported wallet", e);
+                }
            } else {
                Storage.KeyDerivationService keyDerivationService = new Storage.KeyDerivationService(storage, password.get());
                keyDerivationService.setOnSucceeded(workerStateEvent -> {
-                    EventManager.get().post(new StorageEvent(Storage.getWalletFile(wallet.getName()), TimedEvent.Action.END, "Done"));
+                    EventManager.get().post(new StorageEvent(Storage.getWalletFile(wallet.getName()).getAbsolutePath(), TimedEvent.Action.END, "Done"));
                    ECKey encryptionFullKey = keyDerivationService.getValue();
                    Key key = null;

@@ -940,7 +985,10 @@ public class AppController implements Initializable {
                        key = new Key(encryptionFullKey.getPrivKeyBytes(), storage.getKeyDeriver().getSalt(), EncryptionType.Deriver.ARGON2);
                        wallet.encrypt(key);
                        storage.setEncryptionPubKey(encryptionPubKey);
+                        storage.saveWallet(wallet);
                        addWalletTabOrWindow(storage, wallet, null, false);
+                    } catch(IOException | StorageException e) {
+                        log.error("Error saving imported wallet", e);
                    } finally {
                        encryptionFullKey.clear();
                        if(key != null) {
@@ -949,10 +997,10 @@ public class AppController implements Initializable {
                    }
                });
                keyDerivationService.setOnFailed(workerStateEvent -> {
-                    EventManager.get().post(new StorageEvent(Storage.getWalletFile(wallet.getName()), TimedEvent.Action.END, "Failed"));
+                    EventManager.get().post(new StorageEvent(Storage.getWalletFile(wallet.getName()).getAbsolutePath(), TimedEvent.Action.END, "Failed"));
                    showErrorDialog("Error encrypting wallet", keyDerivationService.getException().getMessage());
                });
-                EventManager.get().post(new StorageEvent(Storage.getWalletFile(wallet.getName()), TimedEvent.Action.START, "Encrypting wallet..."));
+                EventManager.get().post(new StorageEvent(Storage.getWalletFile(wallet.getName()).getAbsolutePath(), TimedEvent.Action.START, "Encrypting wallet..."));
                keyDerivationService.start();
            }
        }
@@ -997,6 +1045,28 @@ public class AppController implements Initializable {
        messageSignDialog.showAndWait();
    }

+    public void sendToMany(ActionEvent event) {
+        Tab selectedTab = tabs.getSelectionModel().getSelectedItem();
+        TabData tabData = (TabData)selectedTab.getUserData();
+        if(tabData.getType() == TabData.TabType.WALLET) {
+            WalletTabData walletTabData = (WalletTabData) tabData;
+            Wallet wallet = walletTabData.getWallet();
+            BitcoinUnit bitcoinUnit = Config.get().getBitcoinUnit();
+            if(bitcoinUnit == BitcoinUnit.AUTO) {
+                bitcoinUnit = wallet.getAutoUnit();
+            }
+
+            SendToManyDialog sendToManyDialog = new SendToManyDialog(bitcoinUnit);
+            Optional<List<Payment>> optPayments = sendToManyDialog.showAndWait();
+            optPayments.ifPresent(payments -> {
+                if(!payments.isEmpty()) {
+                    EventManager.get().post(new SendActionEvent(wallet, new ArrayList<>(wallet.getWalletUtxos().keySet())));
+                    Platform.runLater(() -> EventManager.get().post(new SendPaymentsEvent(wallet, payments)));
+                }
+            });
+        }
+    }
+
    public void minimizeToTray(ActionEvent event) {
        AppServices.get().minimizeStage((Stage)tabs.getScene().getWindow());
    }
@@ -1011,18 +1081,18 @@ public class AppController implements Initializable {
            walletTabData.getStorage().backupTempWallet();
            wallet.clearHistory();
            AppServices.clearTransactionHistoryCache(wallet);
-            EventManager.get().post(new WalletAddressesChangedEvent(wallet, pastWallet, walletTabData.getStorage().getWalletFile()));
+            EventManager.get().post(new WalletHistoryClearedEvent(wallet, pastWallet, walletTabData.getWalletForm().getWalletId()));
        }
    }

-    public void addWalletTabOrWindow(Storage storage, Wallet wallet, Wallet backupWallet, boolean forceSameWindow) {
-        Window existingWalletWindow = AppServices.get().getWindowForWallet(storage);
+    public AppController addWalletTabOrWindow(Storage storage, Wallet wallet, Wallet backupWallet, boolean forceSameWindow) {
+        Window existingWalletWindow = AppServices.get().getWindowForWallet(storage.getWalletId(wallet));
        if(existingWalletWindow instanceof Stage) {
            Stage existingWalletStage = (Stage)existingWalletWindow;
            existingWalletStage.toFront();

            EventManager.get().post(new ViewWalletEvent(existingWalletWindow, wallet, storage));
-            return;
+            return this;
        }

        if(!forceSameWindow && Config.get().isOpenWalletsInNewWindows() && !getOpenWallets().isEmpty()) {
@@ -1031,17 +1101,16 @@ public class AppController implements Initializable {
            stage.toFront();
            stage.setX(AppServices.get().getWalletWindowMaxX() + 30);
            appController.addWalletTab(storage, wallet, backupWallet);
+            return appController;
        } else {
            addWalletTab(storage, wallet, backupWallet);
+            return this;
        }
    }

    public void addWalletTab(Storage storage, Wallet wallet, Wallet backupWallet) {
        try {
-            String name = storage.getWalletFile().getName();
-            if(name.endsWith(".json")) {
-                name = name.substring(0, name.lastIndexOf('.'));
-            }
+            String name = storage.getWalletName(wallet);
            if(!name.equals(wallet.getName())) {
                wallet.setName(name);
            }
@@ -1106,7 +1175,8 @@ public class AppController implements Initializable {

    private void addTransactionTab(String name, File file, byte[] bytes) throws PSBTParseException, ParseException, TransactionParseException {
        if(PSBT.isPSBT(bytes)) {
-            PSBT psbt = new PSBT(bytes);
+            //Don't verify signatures here - provided PSBT may omit UTXO data that can be found when combining with an existing PSBT
+            PSBT psbt = new PSBT(bytes, false);
            addTransactionTab(name, file, psbt);
        } else if(Transaction.isTransaction(bytes)) {
            try {
@@ -1182,6 +1252,16 @@ public class AppController implements Initializable {
            }
        }

+        if(psbt != null) {
+            try {
+                //Any PSBTs that have reached this point could not be combined with an existing PSBT. Verify signatures before continuing
+                psbt.verifySignatures();
+            } catch(PSBTSignatureException e) {
+                AppServices.showErrorDialog("Invalid PSBT", e.getMessage());
+                return;
+            }
+        }
+
        try {
            String tabName = name;

@@ -1277,6 +1357,28 @@ public class AppController implements Initializable {
        EventManager.get().post(new ThemeChangedEvent(selectedTheme));
    }

+    private void serverToggleStartAnimation() {
+        Node thumbArea = serverToggle.lookup(".thumb-area");
+        if(thumbArea != null) {
+            FadeTransition fadeTransition = new FadeTransition(Duration.millis(1000), thumbArea);
+            fadeTransition.setFromValue(1.0);
+            fadeTransition.setToValue(0.4);
+            fadeTransition.setAutoReverse(true);
+            fadeTransition.setCycleCount(Animation.INDEFINITE);
+            fadeTransition.play();
+            serverToggle.setUserData(fadeTransition);
+        }
+    }
+
+    private void serverToggleStopAnimation() {
+        if(serverToggle.getUserData() != null) {
+            FadeTransition fadeTransition = (FadeTransition)serverToggle.getUserData();
+            fadeTransition.stop();
+            fadeTransition.getNode().setOpacity(1.0);
+            serverToggle.setUserData(null);
+        }
+    }
+
    private void tabLabelStartAnimation(Wallet wallet) {
        tabs.getTabs().stream().filter(tab -> tab.getUserData() instanceof WalletTabData && ((WalletTabData)tab.getUserData()).getWallet() == wallet).forEach(this::tabLabelStartAnimation);
    }
@@ -1364,6 +1466,8 @@ public class AppController implements Initializable {
                    saveTransaction.setVisible(false);
                }
                exportWallet.setDisable(true);
+                showLoadingLog.setDisable(true);
+                showUtxosChart.setDisable(true);
                showTxHex.setDisable(false);
            } else if(event instanceof WalletTabSelectedEvent) {
                WalletTabSelectedEvent walletTabEvent = (WalletTabSelectedEvent)event;
@@ -1371,6 +1475,8 @@ public class AppController implements Initializable {
                saveTransaction.setVisible(true);
                saveTransaction.setDisable(true);
                exportWallet.setDisable(walletTabData.getWallet() == null || !walletTabData.getWallet().isValid());
+                showLoadingLog.setDisable(false);
+                showUtxosChart.setDisable(false);
                showTxHex.setDisable(true);
            }
        }
@@ -1396,7 +1502,7 @@ public class AppController implements Initializable {
        TabData tabData = (TabData)tab.getUserData();
        if(tabData instanceof WalletTabData) {
            WalletTabData walletTabData = (WalletTabData)tabData;
-            if(walletTabData.getWalletForm().getWalletFile().equals(event.getWalletFile())) {
+            if(walletTabData.getWalletForm().getWalletId().equals(event.getWalletId())) {
                exportWallet.setDisable(!event.getWallet().isValid());
            }
        }
@@ -1544,12 +1650,14 @@ public class AppController implements Initializable {
        if(!statusBar.getText().contains(TRYING_ANOTHER_SERVER_MESSAGE)) {
            statusUpdated(new StatusEvent(event.getStatus(), 120));
        }
+        serverToggleStartAnimation();
    }

    @Subscribe
    public void connectionFailed(ConnectionFailedEvent event) {
        String status = CONNECTION_FAILED_PREFIX + event.getMessage();
        statusUpdated(new StatusEvent(status));
+        serverToggleStopAnimation();
    }

    @Subscribe
@@ -1557,6 +1665,7 @@ public class AppController implements Initializable {
        String status = "Connected to " + Config.get().getServerAddress() + " at height " + event.getBlockHeight();
        statusUpdated(new StatusEvent(status));
        setServerToggleTooltip(event.getBlockHeight());
+        serverToggleStopAnimation();
    }

    @Subscribe
@@ -1571,6 +1680,7 @@ public class AppController implements Initializable {
        for(Wallet wallet : getOpenWallets().keySet()) {
            tabLabelStopAnimation(wallet);
        }
+        serverToggleStopAnimation();
    }

    @Subscribe
@@ -1707,6 +1817,17 @@ public class AppController implements Initializable {
    @Subscribe
    public void viewWallet(ViewWalletEvent event) {
        if(tabs.getScene().getWindow().equals(event.getWindow())) {
+            for(Tab tab : tabs.getTabs()) {
+                TabData tabData = (TabData) tab.getUserData();
+                if(tabData.getType() == TabData.TabType.WALLET) {
+                    WalletTabData walletTabData = (WalletTabData) tabData;
+                    if(event.getStorage().getWalletId(event.getWallet()).equals(walletTabData.getWalletForm().getWalletId())) {
+                        tabs.getSelectionModel().select(tab);
+                        return;
+                    }
+                }
+            }
+
            for(Tab tab : tabs.getTabs()) {
                TabData tabData = (TabData) tab.getUserData();
                if(tabData.getType() == TabData.TabType.WALLET) {
@@ -1758,14 +1879,22 @@ public class AppController implements Initializable {
    @Subscribe
    public void requestWalletOpen(RequestWalletOpenEvent event) {
        if(tabs.getScene().getWindow().equals(event.getWindow())) {
-            openWallet(true);
+            if(event.getFile() != null) {
+                openWalletFile(event.getFile(), true);
+            } else {
+                openWallet(true);
+            }
        }
    }

    @Subscribe
    public void requestTransactionOpen(RequestTransactionOpenEvent event) {
        if(tabs.getScene().getWindow().equals(event.getWindow())) {
-            openTransactionFromFile(null);
+            if(event.getFile() != null) {
+                openTransactionFile(event.getFile());
+            } else {
+                openTransactionFromFile(null);
+            }
        }
    }

@@ -1775,4 +1904,14 @@ public class AppController implements Initializable {
            openTransactionFromQR(null);
        }
    }
-}
+
+    @Subscribe
+    public void sendAction(SendActionEvent event) {
+        selectTab(event.getWallet());
+    }
+
+    @Subscribe
+    public void recieveAction(ReceiveActionEvent event) {
+        selectTab(event.getWallet());
+    }
+}
@@ -4,17 +4,16 @@ import com.google.common.eventbus.Subscribe;
 import com.google.common.net.HostAndPort;
 import com.sparrowwallet.drongo.Network;
 import com.sparrowwallet.drongo.address.Address;
+import com.sparrowwallet.drongo.protocol.ScriptType;
 import com.sparrowwallet.drongo.protocol.Transaction;
 import com.sparrowwallet.drongo.psbt.PSBT;
 import com.sparrowwallet.drongo.uri.BitcoinURI;
 import com.sparrowwallet.drongo.wallet.KeystoreSource;
 import com.sparrowwallet.drongo.wallet.Wallet;
+import com.sparrowwallet.sparrow.control.TextUtils;
 import com.sparrowwallet.sparrow.control.TrayManager;
 import com.sparrowwallet.sparrow.event.*;
-import com.sparrowwallet.sparrow.io.Config;
-import com.sparrowwallet.sparrow.io.Device;
-import com.sparrowwallet.sparrow.io.Hwi;
-import com.sparrowwallet.sparrow.io.Storage;
+import com.sparrowwallet.sparrow.io.*;
 import com.sparrowwallet.sparrow.net.*;
 import javafx.application.Platform;
 import javafx.beans.property.BooleanProperty;
@@ -27,28 +26,35 @@ import javafx.fxml.FXMLLoader;
 import javafx.scene.Node;
 import javafx.scene.Parent;
 import javafx.scene.Scene;
-import javafx.scene.control.Alert;
-import javafx.scene.control.ButtonType;
+import javafx.scene.control.*;
 import javafx.scene.control.Dialog;
-import javafx.scene.control.DialogPane;
+import javafx.scene.control.Label;
 import javafx.scene.image.Image;
+import javafx.scene.image.ImageView;
+import javafx.scene.input.KeyCode;
 import javafx.scene.text.Font;
 import javafx.stage.Screen;
 import javafx.stage.Stage;
 import javafx.stage.Window;
 import javafx.util.Duration;
 import org.berndpruenster.netlayer.tor.Tor;
+import org.controlsfx.control.HyperlinkLabel;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;

+import java.awt.*;
+import java.awt.desktop.OpenFilesHandler;
+import java.awt.desktop.OpenURIHandler;
 import java.io.File;
 import java.io.IOException;
-import java.net.InetSocketAddress;
-import java.net.Proxy;
+import java.net.*;
 import java.time.LocalDateTime;
 import java.time.ZoneId;
 import java.time.temporal.ChronoUnit;
 import java.util.*;
+import java.util.List;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
 import java.util.stream.Collectors;

 public class AppServices {
@@ -61,6 +67,7 @@ public class AppServices {
    private static final int VERSION_CHECK_PERIOD_HOURS = 24;
    private static final ExchangeSource DEFAULT_EXCHANGE_SOURCE = ExchangeSource.COINGECKO;
    private static final Currency DEFAULT_FIAT_CURRENCY = Currency.getInstance("USD");
+    private static final String TOR_DEFAULT_PROXY_CIRCUIT_ID = "default";

    private static AppServices INSTANCE;

@@ -94,6 +101,10 @@ public class AppServices {

    private static List<Device> devices;

+    private static final List<File> argFiles = new ArrayList<>();
+
+    private static final List<URI> argUris = new ArrayList<>();
+
    private static final Map<Address, BitcoinURI> payjoinURIs = new HashMap<>();

    private final ChangeListener<Boolean> onlineServicesListener = new ChangeListener<>() {
@@ -113,6 +124,14 @@ public class AppServices {
        }
    };

+    private static final OpenURIHandler openURIHandler = event -> {
+        openURI(event.getURI());
+    };
+
+    private static final OpenFilesHandler openFilesHandler = event -> {
+        openFiles(event.getFiles(), null);
+    };
+
    public AppServices(MainApp application) {
        this.application = application;
        EventManager.get().register(this);
@@ -134,6 +153,8 @@ public class AppServices {
                restartServices();
            }
        }
+
+        addURIHandlers();
    }

    private void restartServices() {
@@ -219,7 +240,7 @@ public class AppServices {
                connectionService.setRestartOnFailure(false);
                if(tlsServerException.getCause().getMessage().contains("PKIX path building failed")) {
                    File crtFile = Config.get().getElectrumServerCert();
-                    if(crtFile != null) {
+                    if(crtFile != null && Config.get().getServerType() == ServerType.ELECTRUM_SERVER) {
                        AppServices.showErrorDialog("SSL Handshake Failed", "The configured server certificate at " + crtFile.getAbsolutePath() + " did not match the certificate provided by the server at " + tlsServerException.getServer().getHost() + "." +
                                "\n\nThis may indicate a man-in-the-middle attack!" +
                                "\n\nChange the configured server certificate if you would like to proceed.");
@@ -352,18 +373,36 @@ public class AppServices {
        return Tor.getDefault() != null;
    }

+    public static boolean isUsingProxy() {
+        return isTorRunning() || Config.get().isUseProxy();
+    }
+
    public static Proxy getProxy() {
+        return getProxy(TOR_DEFAULT_PROXY_CIRCUIT_ID);
+    }
+
+    public static Proxy getProxy(String proxyCircuitId) {
        Config config = Config.get();
+        Proxy proxy = null;
        if(config.isUseProxy()) {
-            HostAndPort proxy = HostAndPort.fromString(config.getProxyServer());
-            InetSocketAddress proxyAddress = new InetSocketAddress(proxy.getHost(), proxy.getPortOrDefault(ProxyTcpOverTlsTransport.DEFAULT_PROXY_PORT));
-            return new Proxy(Proxy.Type.SOCKS, proxyAddress);
+            HostAndPort proxyHostAndPort = HostAndPort.fromString(config.getProxyServer());
+            InetSocketAddress proxyAddress = new InetSocketAddress(proxyHostAndPort.getHost(), proxyHostAndPort.getPortOrDefault(ProxyTcpOverTlsTransport.DEFAULT_PROXY_PORT));
+            proxy = new Proxy(Proxy.Type.SOCKS, proxyAddress);
        } else if(AppServices.isTorRunning()) {
            InetSocketAddress proxyAddress = new InetSocketAddress("localhost", TorService.PROXY_PORT);
-            return new Proxy(Proxy.Type.SOCKS, proxyAddress);
+            proxy = new Proxy(Proxy.Type.SOCKS, proxyAddress);
        }

-        return null;
+        //Setting new proxy authentication credentials will force a new Tor circuit to be created
+        if(proxy != null) {
+            Authenticator.setDefault(new Authenticator() {
+                public PasswordAuthentication getPasswordAuthentication() {
+                    return (new PasswordAuthentication("user", proxyCircuitId.toCharArray()));
+                }
+            });
+        }
+
+        return proxy;
    }

    static void initialize(MainApp application) {
@@ -415,6 +454,14 @@ public class AppServices {
        stage.hide();
    }

+    public static void onEscapePressed(Scene scene, Runnable runnable) {
+        scene.setOnKeyPressed(event -> {
+            if(event.getCode() == KeyCode.ESCAPE) {
+                runnable.run();
+            }
+        });
+    }
+
    public Map<Wallet, Storage> getOpenWallets() {
        Map<Wallet, Storage> openWallets = new LinkedHashMap<>();
        for(List<WalletTabData> walletTabDataList : walletWindows.values()) {
@@ -426,8 +473,8 @@ public class AppServices {
        return openWallets;
    }

-    public Window getWindowForWallet(Storage storage) {
-        Optional<Window> optWindow = walletWindows.entrySet().stream().filter(entry -> entry.getValue().stream().anyMatch(walletTabData -> walletTabData.getStorage().getWalletFile().equals(storage.getWalletFile()))).map(Map.Entry::getKey).findFirst();
+    public Window getWindowForWallet(String walletId) {
+        Optional<Window> optWindow = walletWindows.entrySet().stream().filter(entry -> entry.getValue().stream().anyMatch(walletTabData -> walletTabData.getWalletForm().getWalletId().equals(walletId))).map(Map.Entry::getKey).findFirst();
        return optWindow.orElse(null);
    }

@@ -500,6 +547,10 @@ public class AppServices {
        ElectrumServer.clearRetrievedScriptHashes(wallet);
    }

+    public static boolean isWalletFile(File file) {
+        return Storage.isWalletFile(file);
+    }
+
    public static Optional<ButtonType> showWarningDialog(String title, String content, ButtonType... buttons) {
        return showAlertDialog(title, content, Alert.AlertType.WARNING, buttons);
    }
@@ -514,6 +565,29 @@ public class AppServices {
        alert.getDialogPane().getScene().getStylesheets().add(AppServices.class.getResource("general.css").toExternalForm());
        alert.setTitle(title);
        alert.setHeaderText(title);
+
+        Pattern linkPattern = Pattern.compile("\\[(http.+)]");
+        Matcher matcher = linkPattern.matcher(content);
+        if(matcher.find()) {
+            String link = matcher.group(1);
+            HyperlinkLabel hyperlinkLabel = new HyperlinkLabel(content);
+            hyperlinkLabel.setMaxWidth(Double.MAX_VALUE);
+            hyperlinkLabel.setMaxHeight(Double.MAX_VALUE);
+            hyperlinkLabel.getStyleClass().add("content");
+            Label label = new Label();
+            hyperlinkLabel.setPrefWidth(Math.max(360, TextUtils.computeTextWidth(label.getFont(), link, 0.0D) + 50));
+            hyperlinkLabel.setOnAction(event -> {
+                alert.close();
+                get().getApplication().getHostServices().showDocument(link);
+            });
+            alert.getDialogPane().setContent(hyperlinkLabel);
+        }
+
+        String[] lines = content.split("\r\n|\r|\n");
+        if(lines.length > 3) {
+            alert.getDialogPane().setPrefHeight(180 + lines.length * 20);
+        }
+
        moveToActiveWindowScreen(alert);
        return alert.showAndWait();
    }
@@ -545,10 +619,6 @@ public class AppServices {
        }
    }

-    public void moveToWalletWindowScreen(Storage storage, Dialog<?> dialog) {
-        moveToWindowScreen(getWindowForWallet(storage), dialog);
-    }
-
    public static void moveToWindowScreen(Window currentWindow, Dialog<?> dialog) {
        Window newWindow = dialog.getDialogPane().getScene().getWindow();
        DialogPane dialogPane = dialog.getDialogPane();
@@ -567,6 +637,135 @@ public class AppServices {
        }
    }

+    static void parseFileUriArguments(List<String> fileUriArguments) {
+        for(String fileUri : fileUriArguments) {
+            try {
+                File file = new File(fileUri.replace("~", System.getProperty("user.home")));
+                if(file.exists()) {
+                    argFiles.add(file);
+                    continue;
+                }
+                URI uri = new URI(fileUri);
+                argUris.add(uri);
+            } catch(URISyntaxException e) {
+                log.warn("Could not parse " + fileUri + " as a valid file or URI");
+            } catch(Exception e) {
+                //ignore
+            }
+        }
+    }
+
+    public static void openFileUriArguments(Window window) {
+        openFiles(argFiles, window);
+        argFiles.clear();
+
+        for(URI argUri : argUris) {
+            openURI(argUri);
+        }
+        argUris.clear();
+    }
+
+    private static void openFiles(List<File> files, Window window) {
+        final List<File> openFiles = new ArrayList<>(files);
+        Platform.runLater(() -> {
+            Window openWindow = window;
+            if(openWindow == null) {
+                openWindow = getActiveWindow();
+            }
+
+            if(openWindow instanceof Stage) {
+                ((Stage)openWindow).setAlwaysOnTop(true);
+                ((Stage)openWindow).setAlwaysOnTop(false);
+            }
+
+            for(File file : openFiles) {
+                if(isWalletFile(file)) {
+                    EventManager.get().post(new RequestWalletOpenEvent(openWindow, file));
+                } else {
+                    EventManager.get().post(new RequestTransactionOpenEvent(openWindow, file));
+                }
+            }
+        });
+    }
+
+    private static void openURI(URI uri) {
+        Platform.runLater(() -> {
+            if("bitcoin".equals(uri.getScheme())) {
+                openBitcoinUri(uri);
+            } else if("aopp".equals(uri.getScheme())) {
+                openAddressOwnershipProof(uri);
+            }
+        });
+    }
+
+    public static void addURIHandlers() {
+        try {
+            if(Desktop.isDesktopSupported()) {
+                if(Desktop.getDesktop().isSupported(Desktop.Action.APP_OPEN_FILE)) {
+                    Desktop.getDesktop().setOpenFileHandler(openFilesHandler);
+                }
+                if(Desktop.getDesktop().isSupported(Desktop.Action.APP_OPEN_URI)) {
+                    Desktop.getDesktop().setOpenURIHandler(openURIHandler);
+                }
+            }
+        } catch(Exception e) {
+            log.error("Could not add URI handler", e);
+        }
+    }
+
+    private static void openBitcoinUri(URI uri) {
+        try {
+            BitcoinURI bitcoinURI = new BitcoinURI(uri.toString());
+            Wallet wallet = selectWallet(null, "pay from");
+
+            if(wallet != null) {
+                final Wallet sendingWallet = wallet;
+                EventManager.get().post(new SendActionEvent(sendingWallet, new ArrayList<>(sendingWallet.getWalletUtxos().keySet())));
+                Platform.runLater(() -> EventManager.get().post(new SendPaymentsEvent(sendingWallet, List.of(bitcoinURI.toPayment()))));
+            }
+        } catch(Exception e) {
+            showErrorDialog("Not a valid bitcoin URI", e.getMessage());
+        }
+    }
+
+    public static void openAddressOwnershipProof(URI uri) {
+        try {
+            Aopp aopp = new Aopp(uri);
+            Wallet wallet = selectWallet(aopp.getScriptType(), "send proof of address");
+
+            if(wallet != null) {
+                EventManager.get().post(new ReceiveActionEvent(wallet));
+                Platform.runLater(() -> EventManager.get().post(new ReceiveProofEvent(wallet, aopp)));
+            }
+        } catch(Exception e) {
+            showErrorDialog("Not a valid AOPP URI", e.getMessage());
+        }
+    }
+
+    private static Wallet selectWallet(ScriptType scriptType, String actionDescription) {
+        Wallet wallet = null;
+        List<Wallet> wallets = get().getOpenWallets().keySet().stream().filter(w -> scriptType == null || w.getScriptType() == scriptType).collect(Collectors.toList());
+        if(wallets.isEmpty()) {
+            showErrorDialog("No wallet available", "Open a" + (scriptType == null ? "" : " " + scriptType.getDescription()) + " wallet to " + actionDescription + ".");
+        } else if(wallets.size() == 1) {
+            wallet = wallets.iterator().next();
+        } else {
+            ChoiceDialog<Wallet> walletChoiceDialog = new ChoiceDialog<>(wallets.iterator().next(), wallets);
+            walletChoiceDialog.setTitle("Choose Wallet");
+            walletChoiceDialog.setHeaderText("Choose a wallet to " + actionDescription);
+            Image image = new Image("/image/sparrow-small.png");
+            walletChoiceDialog.getDialogPane().setGraphic(new ImageView(image));
+            setStageIcon(walletChoiceDialog.getDialogPane().getScene().getWindow());
+            moveToActiveWindowScreen(walletChoiceDialog);
+            Optional<Wallet> optWallet = walletChoiceDialog.showAndWait();
+            if(optWallet.isPresent()) {
+                wallet = optWallet.get();
+            }
+        }
+
+        return wallet;
+    }
+
    public static Font getMonospaceFont() {
        return Font.font("Roboto Mono", 13);
    }
@@ -637,7 +836,10 @@ public class AppServices {
    @Subscribe
    public void openWallets(OpenWalletsEvent event) {
        if(event.getWalletTabDataList().isEmpty()) {
-            walletWindows.remove(event.getWindow());
+            List<WalletTabData> closedTabData = walletWindows.remove(event.getWindow());
+            if(closedTabData != null && !closedTabData.isEmpty()) {
+                EventManager.get().post(new WalletTabsClosedEvent(closedTabData));
+            }
        } else {
            walletWindows.put(event.getWindow(), event.getWalletTabDataList());
        }
@@ -646,7 +848,7 @@ public class AppServices {

        Platform.runLater(() -> {
            if(!Window.getWindows().isEmpty()) {
-                List<File> walletFiles = allWallets.stream().map(walletTabData -> walletTabData.getStorage().getWalletFile()).collect(Collectors.toList());
+                List<File> walletFiles = allWallets.stream().filter(walletTabData -> walletTabData.getWallet().getMasterWallet() == null).map(walletTabData -> walletTabData.getStorage().getWalletFile()).collect(Collectors.toList());
                Config.get().setRecentWalletFiles(Config.get().isLoadRecentWallets() ? walletFiles : Collections.emptyList());
            }
        });
@@ -663,10 +865,6 @@ public class AppServices {
                    deviceEnumerateService = createDeviceEnumerateService();
                }

-                if(deviceEnumerateService.isRunning()) {
-                    deviceEnumerateService.cancel();
-                }
-
                if(deviceEnumerateService.getState() == Worker.State.CANCELLED) {
                    deviceEnumerateService.reset();
                }
@@ -7,14 +7,14 @@ import com.sparrowwallet.drongo.wallet.Wallet;
 import com.sparrowwallet.sparrow.glyphfont.FontAwesome5;
 import com.sparrowwallet.sparrow.glyphfont.FontAwesome5Brands;
 import com.sparrowwallet.sparrow.io.Config;
-import com.sparrowwallet.sparrow.io.FileType;
-import com.sparrowwallet.sparrow.io.IOUtils;
 import com.sparrowwallet.sparrow.io.Storage;
 import com.sparrowwallet.sparrow.net.Bwt;
 import com.sparrowwallet.sparrow.net.PublicElectrumServer;
 import com.sparrowwallet.sparrow.net.ServerType;
 import com.sparrowwallet.sparrow.preferences.PreferenceGroup;
 import com.sparrowwallet.sparrow.preferences.PreferencesDialog;
+import com.sparrowwallet.sparrow.instance.InstanceException;
+import com.sparrowwallet.sparrow.instance.InstanceList;
 import javafx.application.Application;
 import javafx.scene.text.Font;
 import javafx.stage.Stage;
@@ -29,13 +29,17 @@ import java.util.*;
 import java.util.stream.Collectors;

 public class MainApp extends Application {
+    public static final String APP_ID = "com.sparrowwallet.sparrow";
    public static final String APP_NAME = "Sparrow";
-    public static final String APP_VERSION = "1.4.0";
+    public static final String APP_VERSION = "1.4.2";
+    public static final String APP_VERSION_SUFFIX = "-beta";
    public static final String APP_HOME_PROPERTY = "sparrow.home";
    public static final String NETWORK_ENV_PROPERTY = "SPARROW_NETWORK";

    private Stage mainStage;

+    private static SparrowInstance sparrowInstance;
+
    @Override
    public void init() throws Exception {
        Thread.setDefaultUncaughtExceptionHandler((t, e) -> LoggerFactory.getLogger(MainApp.class).error("Exception in thread \"" + t.getName() + "\"", e));
@@ -94,9 +98,8 @@ public class MainApp extends Application {

        List<File> recentWalletFiles = Config.get().getRecentWalletFiles();
        if(recentWalletFiles != null) {
-            //Re-sort to preserve wallet order as far as possible. Unencrypted wallets will still be opened first.
-            List<File> encryptedWalletFiles = recentWalletFiles.stream().filter(file -> FileType.BINARY.equals(IOUtils.getFileType(file))).collect(Collectors.toList());
-            Collections.reverse(encryptedWalletFiles);
+            //Preserve wallet order as far as possible. Unencrypted wallets will still be opened first.
+            List<File> encryptedWalletFiles = recentWalletFiles.stream().filter(Storage::isEncrypted).collect(Collectors.toList());
            List<File> sortedWalletFiles = new ArrayList<>(recentWalletFiles);
            sortedWalletFiles.removeAll(encryptedWalletFiles);
            sortedWalletFiles.addAll(encryptedWalletFiles);
@@ -108,6 +111,8 @@ public class MainApp extends Application {
            }
        }

+        AppServices.openFileUriArguments(stage);
+
        AppServices.get().start();
    }

@@ -115,6 +120,9 @@ public class MainApp extends Application {
    public void stop() throws Exception {
        AppServices.get().stop();
        mainStage.close();
+        if(sparrowInstance != null) {
+            sparrowInstance.freeLock();
+        }
    }

    public static void main(String[] argv) {
@@ -162,6 +170,19 @@ public class MainApp extends Application {
            getLogger().info("Using " + Network.get() + " configuration");
        }

+        List<String> fileUriArguments = jCommander.getUnknownOptions();
+
+        try {
+            sparrowInstance = new SparrowInstance(fileUriArguments);
+            sparrowInstance.acquireLock(); //If fileUriArguments is not empty, will exit app after sending fileUriArguments if lock cannot be acquired
+        } catch(InstanceException e) {
+            getLogger().error("Could not access application lock", e);
+        }
+
+        if(!fileUriArguments.isEmpty()) {
+            AppServices.parseFileUriArguments(fileUriArguments);
+        }
+
        SLF4JBridgeHandler.removeHandlersForRootLogger();
        SLF4JBridgeHandler.install();
        com.sun.javafx.application.LauncherImpl.launchApplication(MainApp.class, MainAppPreloader.class, argv);
@@ -170,4 +191,31 @@ public class MainApp extends Application {
    private static Logger getLogger() {
        return LoggerFactory.getLogger(MainApp.class);
    }
+
+    private static class SparrowInstance extends InstanceList {
+        private final List<String> fileUriArguments;
+
+        public SparrowInstance(List<String> fileUriArguments) {
+            super(MainApp.APP_ID + "." + Network.get(), !fileUriArguments.isEmpty());
+            this.fileUriArguments = fileUriArguments;
+        }
+
+        @Override
+        protected void receiveMessageList(List<String> messageList) {
+            if(messageList != null && !messageList.isEmpty()) {
+                AppServices.parseFileUriArguments(messageList);
+                AppServices.openFileUriArguments(null);
+            }
+        }
+
+        @Override
+        protected List<String> sendMessageList() {
+            return fileUriArguments;
+        }
+
+        @Override
+        protected void beforeExit() {
+            getLogger().info("Opening files/URIs in already running instance, exiting...");
+        }
+    }
 }
@@ -12,6 +12,7 @@ public class WelcomeDialog extends Dialog<Mode> {
    public WelcomeDialog() {
        final DialogPane dialogPane = getDialogPane();
        AppServices.setStageIcon(dialogPane.getScene().getWindow());
+        AppServices.onEscapePressed(dialogPane.getScene(), this::close);

        try {
            FXMLLoader welcomeLoader = new FXMLLoader(AppServices.class.getResource("welcome.fxml"));
@@ -3,6 +3,7 @@ package com.sparrowwallet.sparrow.control;
 import com.sparrowwallet.drongo.address.Address;
 import com.sparrowwallet.sparrow.glyphfont.FontAwesome5;
 import com.sparrowwallet.sparrow.wallet.Entry;
+import com.sparrowwallet.sparrow.wallet.NodeEntry;
 import com.sparrowwallet.sparrow.wallet.UtxoEntry;
 import javafx.geometry.Pos;
 import javafx.scene.control.ContentDisplay;
@@ -32,7 +33,7 @@ public class AddressCell extends TreeTableCell<Entry, Entry> {
                UtxoEntry utxoEntry = (UtxoEntry)entry;
                Address address = utxoEntry.getAddress();
                setText(address.toString());
-                setContextMenu(new EntryCell.AddressContextMenu(address, utxoEntry.getOutputDescriptor(), null));
+                setContextMenu(new EntryCell.AddressContextMenu(address, utxoEntry.getOutputDescriptor(), new NodeEntry(utxoEntry.getWallet(), utxoEntry.getNode())));
                Tooltip tooltip = new Tooltip();
                tooltip.setText(getTooltipText(utxoEntry));
                setTooltip(tooltip);
@@ -0,0 +1,37 @@
+package com.sparrowwallet.sparrow.control;
+
+import com.sparrowwallet.drongo.address.Address;
+import com.sparrowwallet.drongo.address.InvalidAddressException;
+import javafx.util.StringConverter;
+
+public class AddressStringConverter extends StringConverter<Address> {
+    @Override
+    public Address fromString(String value) {
+        // If the specified value is null or zero-length, return null
+        if(value == null) {
+            return null;
+        }
+
+        value = value.trim();
+
+        if (value.length() < 1) {
+            return null;
+        }
+
+        try {
+            return Address.fromString(value);
+        } catch(InvalidAddressException e) {
+            throw new IllegalArgumentException(e);
+        }
+    }
+
+    @Override
+    public String toString(Address value) {
+        // If the specified value is null, return a zero-length String
+        if(value == null) {
+            return "";
+        }
+
+        return value.toString();
+    }
+}
@@ -9,6 +9,7 @@ import com.sparrowwallet.sparrow.wallet.Entry;
 import com.sparrowwallet.sparrow.wallet.NodeEntry;
 import javafx.application.Platform;
 import javafx.beans.property.ReadOnlyObjectWrapper;
+import javafx.collections.ListChangeListener;
 import javafx.scene.control.*;
 import javafx.scene.input.MouseButton;

@@ -82,6 +83,10 @@ public class AddressTreeTable extends CoinTreeTable {
                }
            }
        });
+
+        rootEntry.getChildren().addListener((ListChangeListener<Entry>) c -> {
+            this.refresh();
+        });
    }

    public void updateAll(NodeEntry rootEntry) {
@@ -99,22 +104,21 @@ public class AddressTreeTable extends CoinTreeTable {
    }

    public void updateHistory(List<WalletNode> updatedNodes) {
-        //We only ever add or replace child nodes - never remove in order to keep a full sequence
+        //We only ever add child nodes - never remove in order to keep a full sequence
        NodeEntry rootEntry = (NodeEntry)getRoot().getValue();

        for(WalletNode updatedNode : updatedNodes) {
-            NodeEntry nodeEntry = new NodeEntry(rootEntry.getWallet(), updatedNode);
-
            Optional<Entry> optEntry = rootEntry.getChildren().stream().filter(childEntry -> ((NodeEntry)childEntry).getNode().equals(updatedNode)).findFirst();
            if(optEntry.isPresent()) {
-                int index = rootEntry.getChildren().indexOf(optEntry.get());
-                rootEntry.getChildren().set(index, nodeEntry);
+                NodeEntry existingEntry = (NodeEntry)optEntry.get();
+                existingEntry.refreshChildren();
            } else {
+                NodeEntry nodeEntry = new NodeEntry(rootEntry.getWallet(), updatedNode);
                rootEntry.getChildren().add(nodeEntry);
            }
        }

-        sort();
+        refresh();
    }

    public void updateLabel(Entry entry) {
@@ -10,16 +10,24 @@ import javafx.scene.control.ContentDisplay;
 import javafx.scene.control.Tooltip;
 import javafx.scene.control.TreeTableCell;
 import javafx.scene.layout.Region;
+import org.controlsfx.tools.Platform;

+import java.text.DecimalFormat;
+import java.text.DecimalFormatSymbols;
 import java.util.Locale;

 class CoinCell extends TreeTableCell<Entry, Number> {
+    public static final DecimalFormat TABLE_BTC_FORMAT = new DecimalFormat("0.00000000", DecimalFormatSymbols.getInstance(Locale.ENGLISH));
+
    private final Tooltip tooltip;

    public CoinCell() {
        super();
        tooltip = new Tooltip();
        getStyleClass().add("coin-cell");
+        if(Platform.getCurrent() == Platform.OSX) {
+            getStyleClass().add("number-field");
+        }
    }

    @Override
@@ -38,7 +46,8 @@ class CoinCell extends TreeTableCell<Entry, Number> {
            BitcoinUnit unit = coinTreeTable.getBitcoinUnit();

            String satsValue = String.format(Locale.ENGLISH, "%,d", amount.longValue());
-            final String btcValue = CoinLabel.getBTCFormat().format(amount.doubleValue() / Transaction.SATOSHIS_PER_BITCOIN);
+            DecimalFormat decimalFormat = (amount.longValue() == 0L ? CoinLabel.getBTCFormat() : TABLE_BTC_FORMAT);
+            final String btcValue = decimalFormat.format(amount.doubleValue() / Transaction.SATOSHIS_PER_BITCOIN);

            if(unit.equals(BitcoinUnit.BTC)) {
                tooltip.setText(satsValue + " " + BitcoinUnit.SATOSHIS.getLabel());
@@ -5,8 +5,8 @@ import com.sparrowwallet.drongo.wallet.Wallet;
 import com.sparrowwallet.sparrow.AppServices;
 import com.sparrowwallet.sparrow.EventManager;
 import com.sparrowwallet.sparrow.event.WalletDataChangedEvent;
+import com.sparrowwallet.sparrow.event.WalletHistoryClearedEvent;
 import com.sparrowwallet.sparrow.event.WalletHistoryStatusEvent;
-import com.sparrowwallet.sparrow.event.WalletAddressesChangedEvent;
 import com.sparrowwallet.sparrow.io.Config;
 import com.sparrowwallet.sparrow.io.Storage;
 import com.sparrowwallet.sparrow.net.ServerType;
@@ -92,7 +92,7 @@ public class CoinTreeTable extends TreeTableView<Entry> {
                    EventManager.get().post(new WalletDataChangedEvent(wallet));
                    //Trigger full wallet rescan
                    wallet.clearHistory();
-                    EventManager.get().post(new WalletAddressesChangedEvent(wallet, pastWallet, storage.getWalletFile()));
+                    EventManager.get().post(new WalletHistoryClearedEvent(wallet, pastWallet, storage.getWalletId(wallet)));
                }
            });
            if(wallet.getBirthDate() == null) {
@@ -34,7 +34,7 @@ public class DateCell extends TreeTableCell<Entry, Entry> {
            if(entry instanceof UtxoEntry) {
                UtxoEntry utxoEntry = (UtxoEntry)entry;
                if(utxoEntry.getHashIndex().getHeight() <= 0) {
-                    setText("Unconfirmed " + (utxoEntry.isSpendable() ? "(Spendable)" : "(Not yet spendable)"));
+                    setText("Unconfirmed " + (utxoEntry.getHashIndex().getHeight() < 0 ? "Parent " : "") + (utxoEntry.isSpendable() ? "(Spendable)" : "(Not yet spendable)"));
                } else {
                    String date = DATE_FORMAT.format(utxoEntry.getHashIndex().getDate());
                    setText(date);
@@ -25,8 +25,8 @@ public class DeviceAddressDialog extends DeviceDialog<String> {
    }

    @Override
-    protected DevicePane getDevicePane(Device device) {
-        return new DevicePane(wallet, outputDescriptor, device);
+    protected DevicePane getDevicePane(Device device, boolean defaultDevice) {
+        return new DevicePane(wallet, outputDescriptor, device, defaultDevice);
    }

    @Subscribe
@@ -22,6 +22,7 @@ import java.util.Objects;
 public abstract class DeviceDialog<R> extends Dialog<R> {
    private final List<String> operationFingerprints;
    private final Accordion deviceAccordion;
+    private final Button scanButton;
    private final VBox scanBox;
    private final Label scanLabel;

@@ -57,18 +58,19 @@ public abstract class DeviceDialog<R> extends Dialog<R> {
        Glyph usb = new Glyph(FontAwesome5Brands.FONT_NAME, FontAwesome5Brands.Glyph.USB);
        usb.setFontSize(50);
        scanLabel = new Label("Connect Hardware Wallet");
-        Button button = new Button("Scan...");
-        button.setPrefSize(120, 60);
-        button.setOnAction(event -> {
+        scanButton = new Button("Scan...");
+        scanButton.setPrefSize(120, 60);
+        scanButton.setOnAction(event -> {
            scan();
        });
-        scanBox.getChildren().addAll(usb, scanLabel, button);
+        scanBox.getChildren().addAll(usb, scanLabel, scanButton);
        scanBox.managedProperty().bind(scanBox.visibleProperty());

        stackPane.getChildren().addAll(anchorPane, scanBox);

        List<Device> devices = AppServices.getDevices();
        if(devices == null || devices.isEmpty()) {
+            scanButton.setDefaultButton(true);
            scanBox.setVisible(true);
        } else {
            Platform.runLater(() -> setDevices(devices));
@@ -97,15 +99,21 @@ public abstract class DeviceDialog<R> extends Dialog<R> {
    private void scan() {
        Hwi.EnumerateService enumerateService = new Hwi.EnumerateService(null);
        enumerateService.setOnSucceeded(workerStateEvent -> {
+            scanButton.setText("Scan...");
            List<Device> devices = enumerateService.getValue();
            setDevices(devices);
            Platform.runLater(() -> EventManager.get().post(new UsbDeviceEvent(devices)));
        });
        enumerateService.setOnFailed(workerStateEvent -> {
+            scanButton.setText("Scan...");
            deviceAccordion.getPanes().clear();
+            scanButton.setDefaultButton(true);
            scanBox.setVisible(true);
            scanLabel.setText(workerStateEvent.getSource().getException().getMessage());
        });
+        enumerateService.setOnRunning(workerStateEvent -> {
+            scanButton.setText("Scanning...");
+        });
        enumerateService.start();
    }

@@ -122,16 +130,17 @@ public abstract class DeviceDialog<R> extends Dialog<R> {
        deviceAccordion.getPanes().clear();

        if(dialogDevices.isEmpty()) {
+            scanButton.setDefaultButton(true);
            scanBox.setVisible(true);
            scanLabel.setText("No matching devices found");
        } else {
            scanBox.setVisible(false);
            for(Device device : dialogDevices) {
-                DevicePane devicePane = getDevicePane(device);
+                DevicePane devicePane = getDevicePane(device, dialogDevices.size() == 1);
                deviceAccordion.getPanes().add(devicePane);
            }
        }
    }

-    protected abstract DevicePane getDevicePane(Device device);
+    protected abstract DevicePane getDevicePane(Device device, boolean defaultDevice);
 }
@@ -59,7 +59,9 @@ public class DevicePane extends TitledDescriptionPane {

    private final SimpleStringProperty passphrase = new SimpleStringProperty("");

-    public DevicePane(Wallet wallet, Device device) {
+    private boolean defaultDevice;
+
+    public DevicePane(Wallet wallet, Device device, boolean defaultDevice) {
        super(device.getModel().toDisplayString(), "", "", "image/" + device.getType() + ".png");
        this.deviceOperation = DeviceOperation.IMPORT;
        this.wallet = wallet;
@@ -68,6 +70,7 @@ public class DevicePane extends TitledDescriptionPane {
        this.keyDerivation = null;
        this.message = null;
        this.device = device;
+        this.defaultDevice = defaultDevice;

        setDefaultStatus();
        showHideLink.setVisible(false);
@@ -80,7 +83,7 @@ public class DevicePane extends TitledDescriptionPane {
        buttonBox.getChildren().addAll(setPassphraseButton, importButton);
    }

-    public DevicePane(PSBT psbt, Device device) {
+    public DevicePane(PSBT psbt, Device device, boolean defaultDevice) {
        super(device.getModel().toDisplayString(), "", "", "image/" + device.getType() + ".png");
        this.deviceOperation = DeviceOperation.SIGN;
        this.wallet = null;
@@ -89,6 +92,7 @@ public class DevicePane extends TitledDescriptionPane {
        this.keyDerivation = null;
        this.message = null;
        this.device = device;
+        this.defaultDevice = defaultDevice;

        setDefaultStatus();
        showHideLink.setVisible(false);
@@ -101,7 +105,7 @@ public class DevicePane extends TitledDescriptionPane {
        buttonBox.getChildren().addAll(setPassphraseButton, signButton);
    }

-    public DevicePane(Wallet wallet, OutputDescriptor outputDescriptor, Device device) {
+    public DevicePane(Wallet wallet, OutputDescriptor outputDescriptor, Device device, boolean defaultDevice) {
        super(device.getModel().toDisplayString(), "", "", "image/" + device.getType() + ".png");
        this.deviceOperation = DeviceOperation.DISPLAY_ADDRESS;
        this.wallet = wallet;
@@ -110,6 +114,7 @@ public class DevicePane extends TitledDescriptionPane {
        this.keyDerivation = null;
        this.message = null;
        this.device = device;
+        this.defaultDevice = defaultDevice;

        setDefaultStatus();
        showHideLink.setVisible(false);
@@ -122,7 +127,7 @@ public class DevicePane extends TitledDescriptionPane {
        buttonBox.getChildren().addAll(setPassphraseButton, displayAddressButton);
    }

-    public DevicePane(Wallet wallet, String message, KeyDerivation keyDerivation, Device device) {
+    public DevicePane(Wallet wallet, String message, KeyDerivation keyDerivation, Device device, boolean defaultDevice) {
        super(device.getModel().toDisplayString(), "", "", "image/" + device.getType() + ".png");
        this.deviceOperation = DeviceOperation.SIGN_MESSAGE;
        this.wallet = wallet;
@@ -131,6 +136,7 @@ public class DevicePane extends TitledDescriptionPane {
        this.keyDerivation = keyDerivation;
        this.message = message;
        this.device = device;
+        this.defaultDevice = defaultDevice;

        setDefaultStatus();
        showHideLink.setVisible(false);
@@ -145,6 +151,7 @@ public class DevicePane extends TitledDescriptionPane {

    private void initialise(Device device) {
        if(device.isNeedsPinSent()) {
+            unlockButton.setDefaultButton(defaultDevice);
            unlockButton.setVisible(true);
        } else if(device.isNeedsPassphraseSent()) {
            setPassphraseButton.setVisible(true);
@@ -229,7 +236,6 @@ public class DevicePane extends TitledDescriptionPane {

    private void createSignButton() {
        signButton = new Button("Sign");
-        signButton.setDefaultButton(true);
        signButton.setAlignment(Pos.CENTER_RIGHT);
        signButton.setMinWidth(44);
        signButton.setOnAction(event -> {
@@ -242,7 +248,6 @@ public class DevicePane extends TitledDescriptionPane {

    private void createDisplayAddressButton() {
        displayAddressButton = new Button("Display Address");
-        displayAddressButton.setDefaultButton(true);
        displayAddressButton.setAlignment(Pos.CENTER_RIGHT);
        displayAddressButton.setOnAction(event -> {
            displayAddressButton.setDisable(true);
@@ -259,7 +264,6 @@ public class DevicePane extends TitledDescriptionPane {

    private void createSignMessageButton() {
        signMessageButton = new Button("Sign Message");
-        signMessageButton.setDefaultButton(true);
        signMessageButton.setAlignment(Pos.CENTER_RIGHT);
        signMessageButton.setOnAction(event -> {
            signMessageButton.setDisable(true);
@@ -284,7 +288,9 @@ public class DevicePane extends TitledDescriptionPane {
        vBox.setMaxHeight(120);
        vBox.setSpacing(42);
        pinField = (CustomPasswordField)TextFields.createClearablePasswordField();
+        Platform.runLater(() -> pinField.requestFocus());
        enterPinButton = new Button("Enter PIN");
+        enterPinButton.setDefaultButton(true);
        enterPinButton.setOnAction(event -> {
            enterPinButton.setDisable(true);
            sendPin(pinField.getText());
@@ -324,9 +330,15 @@ public class DevicePane extends TitledDescriptionPane {
        CustomPasswordField passphraseField = (CustomPasswordField)TextFields.createClearablePasswordField();
        passphrase.bind(passphraseField.textProperty());
        HBox.setHgrow(passphraseField, Priority.ALWAYS);
+        passphraseField.setOnAction(event -> {
+            setExpanded(false);
+            setDescription("Confirm passphrase on device...");
+            sendPassphrase(passphrase.get());
+        });

        SplitMenuButton sendPassphraseButton = new SplitMenuButton();
        sendPassphraseButton.setText("Send Passphrase");
+        sendPassphraseButton.getStyleClass().add("default-button");
        sendPassphraseButton.setOnAction(event -> {
            setExpanded(false);
            setDescription("Confirm passphrase on device...");
@@ -604,17 +616,23 @@ public class DevicePane extends TitledDescriptionPane {

    private void showOperationButton() {
        if(deviceOperation.equals(DeviceOperation.IMPORT)) {
+            if(defaultDevice) {
+                importButton.getStyleClass().add("default-button");
+            }
            importButton.setVisible(true);
            showHideLink.setText("Show derivation...");
            showHideLink.setVisible(true);
            setContent(getDerivationEntry(wallet.getScriptType() == null ? ScriptType.P2WPKH.getDefaultDerivation() : wallet.getScriptType().getDefaultDerivation()));
        } else if(deviceOperation.equals(DeviceOperation.SIGN)) {
+            signButton.setDefaultButton(defaultDevice);
            signButton.setVisible(true);
            showHideLink.setVisible(false);
        } else if(deviceOperation.equals(DeviceOperation.DISPLAY_ADDRESS)) {
+            displayAddressButton.setDefaultButton(defaultDevice);
            displayAddressButton.setVisible(true);
            showHideLink.setVisible(false);
        } else if(deviceOperation.equals(DeviceOperation.SIGN_MESSAGE)) {
+            signMessageButton.setDefaultButton(defaultDevice);
            signMessageButton.setVisible(true);
            showHideLink.setVisible(false);
        }
@@ -627,11 +645,11 @@ public class DevicePane extends TitledDescriptionPane {
        HBox.setHgrow(derivationField, Priority.ALWAYS);

        ValidationSupport validationSupport = new ValidationSupport();
+        validationSupport.setValidationDecorator(new StyleClassValidationDecoration());
        validationSupport.registerValidator(derivationField, Validator.combine(
                Validator.createEmptyValidator("Derivation is required"),
                (Control c, String newValue) -> ValidationResult.fromErrorIf( c, "Invalid derivation", !KeyDerivation.isValid(newValue))
        ));
-        validationSupport.setValidationDecorator(new StyleClassValidationDecoration());

        Button importDerivationButton = new Button("Import");
        importDerivationButton.setOnAction(event -> {
@@ -22,8 +22,8 @@ public class DeviceSignDialog extends DeviceDialog<PSBT> {
    }

    @Override
-    protected DevicePane getDevicePane(Device device) {
-        return new DevicePane(psbt, device);
+    protected DevicePane getDevicePane(Device device, boolean defaultDevice) {
+        return new DevicePane(psbt, device, defaultDevice);
    }

    @Subscribe
@@ -26,8 +26,8 @@ public class DeviceSignMessageDialog extends DeviceDialog<String> {
    }

    @Override
-    protected DevicePane getDevicePane(Device device) {
-        return new DevicePane(wallet, message, keyDerivation, device);
+    protected DevicePane getDevicePane(Device device, boolean defaultDevice) {
+        return new DevicePane(wallet, message, keyDerivation, device, defaultDevice);
    }

    @Subscribe
@@ -4,6 +4,7 @@ import com.sparrowwallet.drongo.KeyPurpose;
 import com.sparrowwallet.drongo.Utils;
 import com.sparrowwallet.drongo.address.Address;
 import com.sparrowwallet.drongo.protocol.Transaction;
+import com.sparrowwallet.drongo.protocol.TransactionInput;
 import com.sparrowwallet.drongo.protocol.TransactionOutput;
 import com.sparrowwallet.drongo.wallet.*;
 import com.sparrowwallet.sparrow.AppServices;
@@ -72,9 +73,7 @@ public class EntryCell extends TreeTableCell<Entry, Entry> {

                HBox actionBox = new HBox();
                Button viewTransactionButton = new Button("");
-                Glyph searchGlyph = new Glyph(FontAwesome5.FONT_NAME, FontAwesome5.Glyph.SEARCH);
-                searchGlyph.setFontSize(12);
-                viewTransactionButton.setGraphic(searchGlyph);
+                viewTransactionButton.setGraphic(getViewTransactionGlyph());
                viewTransactionButton.setOnAction(event -> {
                    EventManager.get().post(new ViewTransactionEvent(this.getScene().getWindow(), transactionEntry.getBlockTransaction()));
                });
@@ -83,9 +82,7 @@ public class EntryCell extends TreeTableCell<Entry, Entry> {
                BlockTransaction blockTransaction = transactionEntry.getBlockTransaction();
                if(blockTransaction.getHeight() <= 0 && blockTransaction.getTransaction().isReplaceByFee() && transactionEntry.getWallet().allInputsFromWallet(blockTransaction.getHash())) {
                    Button increaseFeeButton = new Button("");
-                    Glyph increaseFeeGlyph = new Glyph(FontAwesome5.FONT_NAME, FontAwesome5.Glyph.HAND_HOLDING_MEDICAL);
-                    increaseFeeGlyph.setFontSize(12);
-                    increaseFeeButton.setGraphic(increaseFeeGlyph);
+                    increaseFeeButton.setGraphic(getIncreaseFeeRBFGlyph());
                    increaseFeeButton.setOnAction(event -> {
                        increaseFee(transactionEntry);
                    });
@@ -94,9 +91,7 @@ public class EntryCell extends TreeTableCell<Entry, Entry> {

                if(blockTransaction.getHeight() <= 0 && containsWalletOutputs(transactionEntry)) {
                    Button cpfpButton = new Button("");
-                    Glyph cpfpGlyph = new Glyph(FontAwesome5.FONT_NAME, FontAwesome5.Glyph.SIGN_OUT_ALT);
-                    cpfpGlyph.setFontSize(12);
-                    cpfpButton.setGraphic(cpfpGlyph);
+                    cpfpButton.setGraphic(getIncreaseFeeCPFPGlyph());
                    cpfpButton.setOnAction(event -> {
                        createCpfp(transactionEntry);
                    });
@@ -108,7 +103,7 @@ public class EntryCell extends TreeTableCell<Entry, Entry> {
                NodeEntry nodeEntry = (NodeEntry)entry;
                Address address = nodeEntry.getAddress();
                setText(address.toString());
-                setContextMenu(new AddressContextMenu(address, nodeEntry.getOutputDescriptor(), null));
+                setContextMenu(new AddressContextMenu(address, nodeEntry.getOutputDescriptor(), nodeEntry));
                Tooltip tooltip = new Tooltip();
                tooltip.setText(nodeEntry.getNode().getDerivationPath().replace("m", ".."));
                setTooltip(tooltip);
@@ -116,9 +111,7 @@ public class EntryCell extends TreeTableCell<Entry, Entry> {

                HBox actionBox = new HBox();
                Button receiveButton = new Button("");
-                Glyph receiveGlyph = new Glyph("FontAwesome", FontAwesome.Glyph.ARROW_DOWN);
-                receiveGlyph.setFontSize(12);
-                receiveButton.setGraphic(receiveGlyph);
+                receiveButton.setGraphic(getReceiveGlyph());
                receiveButton.setOnAction(event -> {
                    EventManager.get().post(new ReceiveActionEvent(nodeEntry));
                    Platform.runLater(() -> EventManager.get().post(new ReceiveToEvent(nodeEntry)));
@@ -128,9 +121,7 @@ public class EntryCell extends TreeTableCell<Entry, Entry> {
                if(nodeEntry.getWallet().getKeystores().size() == 1 &&
                        (nodeEntry.getWallet().getKeystores().get(0).hasPrivateKey() || nodeEntry.getWallet().getKeystores().get(0).getSource() == KeystoreSource.HW_USB)) {
                    Button signMessageButton = new Button("");
-                    Glyph signMessageGlyph = new Glyph(FontAwesome5.FONT_NAME, FontAwesome5.Glyph.PEN_FANCY);
-                    signMessageGlyph.setFontSize(12);
-                    signMessageButton.setGraphic(signMessageGlyph);
+                    signMessageButton.setGraphic(getSignMessageGlyph());
                    signMessageButton.setOnAction(event -> {
                        MessageSignDialog messageSignDialog = new MessageSignDialog(nodeEntry.getWallet(), nodeEntry.getNode());
                        messageSignDialog.showAndWait();
@@ -150,9 +141,7 @@ public class EntryCell extends TreeTableCell<Entry, Entry> {

                HBox actionBox = new HBox();
                Button viewTransactionButton = new Button("");
-                Glyph searchGlyph = new Glyph(FontAwesome5.FONT_NAME, FontAwesome5.Glyph.SEARCH);
-                searchGlyph.setFontSize(12);
-                viewTransactionButton.setGraphic(searchGlyph);
+                viewTransactionButton.setGraphic(getViewTransactionGlyph());
                viewTransactionButton.setOnAction(event -> {
                    EventManager.get().post(new ViewTransactionEvent(this.getScene().getWindow(), hashIndexEntry.getBlockTransaction(), hashIndexEntry));
                });
@@ -160,9 +149,7 @@ public class EntryCell extends TreeTableCell<Entry, Entry> {

                if(hashIndexEntry.getType().equals(HashIndexEntry.Type.OUTPUT) && hashIndexEntry.isSpendable() && !hashIndexEntry.getHashIndex().isSpent()) {
                    Button spendUtxoButton = new Button("");
-                    Glyph sendGlyph = new Glyph("FontAwesome", FontAwesome.Glyph.SEND);
-                    sendGlyph.setFontSize(12);
-                    spendUtxoButton.setGraphic(sendGlyph);
+                    spendUtxoButton.setGraphic(getSendGlyph());
                    spendUtxoButton.setOnAction(event -> {
                        sendSelectedUtxos(getTreeTableView(), hashIndexEntry);
                    });
@@ -182,6 +169,7 @@ public class EntryCell extends TreeTableCell<Entry, Entry> {
                .map(e -> (HashIndexEntry)e)
                .filter(e -> e.getType().equals(HashIndexEntry.Type.INPUT) && e.isSpendable())
                .map(e -> blockTransaction.getTransaction().getInputs().get((int)e.getHashIndex().getIndex()))
+                .filter(TransactionInput::isReplaceByFeeEnabled)
                .map(txInput -> walletTxos.keySet().stream().filter(txo -> txo.getHash().equals(txInput.getOutpoint().getHash()) && txo.getIndex() == txInput.getOutpoint().getIndex()).findFirst().get())
                .collect(Collectors.toList());

@@ -249,7 +237,7 @@ public class EntryCell extends TreeTableCell<Entry, Entry> {
    }

    private static Double getMaxFeeRate() {
-        if(AppServices.getTargetBlockFeeRates().isEmpty()) {
+        if(AppServices.getTargetBlockFeeRates() == null || AppServices.getTargetBlockFeeRates().isEmpty()) {
            return 100.0;
        }

@@ -314,21 +302,74 @@ public class EntryCell extends TreeTableCell<Entry, Entry> {
        EventManager.get().post(new WalletUtxoStatusChangedEvent(hashIndexEntry.getWallet(), hashIndexEntry.getHashIndex()));
    }

+    private static Glyph getViewTransactionGlyph() {
+        Glyph searchGlyph = new Glyph(FontAwesome5.FONT_NAME, FontAwesome5.Glyph.SEARCH);
+        searchGlyph.setFontSize(12);
+        return searchGlyph;
+    }
+
+    private static Glyph getIncreaseFeeRBFGlyph() {
+        Glyph increaseFeeGlyph = new Glyph(FontAwesome5.FONT_NAME, FontAwesome5.Glyph.HAND_HOLDING_MEDICAL);
+        increaseFeeGlyph.setFontSize(12);
+        return increaseFeeGlyph;
+    }
+
+    private static Glyph getIncreaseFeeCPFPGlyph() {
+        Glyph cpfpGlyph = new Glyph(FontAwesome5.FONT_NAME, FontAwesome5.Glyph.SIGN_OUT_ALT);
+        cpfpGlyph.setFontSize(12);
+        return cpfpGlyph;
+    }
+
+    private static Glyph getReceiveGlyph() {
+        Glyph receiveGlyph = new Glyph("FontAwesome", FontAwesome.Glyph.ARROW_DOWN);
+        receiveGlyph.setFontSize(12);
+        return receiveGlyph;
+    }
+
+    private static Glyph getSignMessageGlyph() {
+        Glyph signMessageGlyph = new Glyph(FontAwesome5.FONT_NAME, FontAwesome5.Glyph.PEN_FANCY);
+        signMessageGlyph.setFontSize(12);
+        return signMessageGlyph;
+    }
+
+    private static Glyph getSendGlyph() {
+        Glyph sendGlyph = new Glyph("FontAwesome", FontAwesome.Glyph.SEND);
+        sendGlyph.setFontSize(12);
+        return sendGlyph;
+    }
+
+    private static Glyph getCopyGlyph() {
+        Glyph copyGlyph = new Glyph(FontAwesome5.FONT_NAME, FontAwesome5.Glyph.COPY);
+        copyGlyph.setFontSize(12);
+        return copyGlyph;
+    }
+
+    private static Glyph getFreezeGlyph() {
+        Glyph copyGlyph = new Glyph(FontAwesome5.FONT_NAME, FontAwesome5.Glyph.SNOWFLAKE);
+        copyGlyph.setFontSize(12);
+        return copyGlyph;
+    }
+
+    private static Glyph getUnfreezeGlyph() {
+        Glyph copyGlyph = new Glyph(FontAwesome5.FONT_NAME, FontAwesome5.Glyph.SUN);
+        copyGlyph.setFontSize(12);
+        return copyGlyph;
+    }
+
    private static class UnconfirmedTransactionContextMenu extends ContextMenu {
        public UnconfirmedTransactionContextMenu(TransactionEntry transactionEntry) {
            BlockTransaction blockTransaction = transactionEntry.getBlockTransaction();
-            MenuItem copyTxid = new MenuItem("Copy Transaction ID");
-            copyTxid.setOnAction(AE -> {
+            MenuItem viewTransaction = new MenuItem("View Transaction");
+            viewTransaction.setGraphic(getViewTransactionGlyph());
+            viewTransaction.setOnAction(AE -> {
                hide();
-                ClipboardContent content = new ClipboardContent();
-                content.putString(blockTransaction.getHashAsString());
-                Clipboard.getSystemClipboard().setContent(content);
+                EventManager.get().post(new ViewTransactionEvent(this.getOwnerWindow(), blockTransaction));
            });
-
-            getItems().add(copyTxid);
+            getItems().add(viewTransaction);

            if(blockTransaction.getTransaction().isReplaceByFee() && transactionEntry.getWallet().allInputsFromWallet(blockTransaction.getHash())) {
                MenuItem increaseFee = new MenuItem("Increase Fee (RBF)");
+                increaseFee.setGraphic(getIncreaseFeeRBFGlyph());
                increaseFee.setOnAction(AE -> {
                    hide();
                    increaseFee(transactionEntry);
@@ -339,6 +380,7 @@ public class EntryCell extends TreeTableCell<Entry, Entry> {

            if(containsWalletOutputs(transactionEntry)) {
                MenuItem createCpfp = new MenuItem("Increase Effective Fee (CPFP)");
+                createCpfp.setGraphic(getIncreaseFeeCPFPGlyph());
                createCpfp.setOnAction(AE -> {
                    hide();
                    createCpfp(transactionEntry);
@@ -346,11 +388,28 @@ public class EntryCell extends TreeTableCell<Entry, Entry> {

                getItems().add(createCpfp);
            }
+
+            MenuItem copyTxid = new MenuItem("Copy Transaction ID");
+            copyTxid.setOnAction(AE -> {
+                hide();
+                ClipboardContent content = new ClipboardContent();
+                content.putString(blockTransaction.getHashAsString());
+                Clipboard.getSystemClipboard().setContent(content);
+            });
+
+            getItems().add(copyTxid);
        }
    }

    private static class TransactionContextMenu extends ContextMenu {
        public TransactionContextMenu(String date, BlockTransaction blockTransaction) {
+            MenuItem viewTransaction = new MenuItem("View Transaction");
+            viewTransaction.setGraphic(getViewTransactionGlyph());
+            viewTransaction.setOnAction(AE -> {
+                hide();
+                EventManager.get().post(new ViewTransactionEvent(this.getOwnerWindow(), blockTransaction));
+            });
+
            MenuItem copyDate = new MenuItem("Copy Date");
            copyDate.setOnAction(AE -> {
                hide();
@@ -375,12 +434,32 @@ public class EntryCell extends TreeTableCell<Entry, Entry> {
                Clipboard.getSystemClipboard().setContent(content);
            });

-            getItems().addAll(copyDate, copyTxid, copyHeight);
+            getItems().addAll(viewTransaction, copyDate, copyTxid, copyHeight);
        }
    }

    public static class AddressContextMenu extends ContextMenu {
        public AddressContextMenu(Address address, String outputDescriptor, NodeEntry nodeEntry) {
+            MenuItem receiveToAddress = new MenuItem("Receive To");
+            receiveToAddress.setGraphic(getReceiveGlyph());
+            receiveToAddress.setOnAction(event -> {
+                hide();
+                EventManager.get().post(new ReceiveActionEvent(nodeEntry));
+                Platform.runLater(() -> EventManager.get().post(new ReceiveToEvent(nodeEntry)));
+            });
+            getItems().add(receiveToAddress);
+
+            if(nodeEntry != null) {
+                MenuItem signVerifyMessage = new MenuItem("Sign/Verify Message");
+                signVerifyMessage.setGraphic(getSignMessageGlyph());
+                signVerifyMessage.setOnAction(AE -> {
+                    hide();
+                    MessageSignDialog messageSignDialog = new MessageSignDialog(nodeEntry.getWallet(), nodeEntry.getNode());
+                    messageSignDialog.showAndWait();
+                });
+                getItems().add(signVerifyMessage);
+            }
+
            MenuItem copyAddress = new MenuItem("Copy Address");
            copyAddress.setOnAction(AE -> {
                hide();
@@ -406,34 +485,22 @@ public class EntryCell extends TreeTableCell<Entry, Entry> {
            });

            getItems().addAll(copyAddress, copyHex, copyOutputDescriptor);
-
-            if(nodeEntry != null) {
-                MenuItem signVerifyMessage = new MenuItem("Sign/Verify Message");
-                signVerifyMessage.setOnAction(AE -> {
-                    hide();
-                    MessageSignDialog messageSignDialog = new MessageSignDialog(nodeEntry.getWallet(), nodeEntry.getNode());
-                    messageSignDialog.showAndWait();
-                });
-
-                getItems().add(signVerifyMessage);
-            }
        }
    }

    private static class HashIndexEntryContextMenu extends ContextMenu {
        public HashIndexEntryContextMenu(TreeTableView<Entry> treeTableView, HashIndexEntry hashIndexEntry) {
-            String label = "Copy " + (hashIndexEntry.getType().equals(HashIndexEntry.Type.OUTPUT) ? "Transaction Output" : "Transaction Input");
-            MenuItem copyHashIndex = new MenuItem(label);
-            copyHashIndex.setOnAction(AE -> {
+            MenuItem viewTransaction = new MenuItem("View Transaction");
+            viewTransaction.setGraphic(getViewTransactionGlyph());
+            viewTransaction.setOnAction(AE -> {
                hide();
-                ClipboardContent content = new ClipboardContent();
-                content.putString(hashIndexEntry.getHashIndex().toString());
-                Clipboard.getSystemClipboard().setContent(content);
+                EventManager.get().post(new ViewTransactionEvent(this.getOwnerWindow(), hashIndexEntry.getBlockTransaction()));
            });
-            getItems().add(copyHashIndex);
+            getItems().add(viewTransaction);

            if(hashIndexEntry.getType().equals(HashIndexEntry.Type.OUTPUT) && hashIndexEntry.isSpendable() && !hashIndexEntry.getHashIndex().isSpent()) {
                MenuItem sendSelected = new MenuItem("Send Selected");
+                sendSelected.setGraphic(getSendGlyph());
                sendSelected.setOnAction(AE -> {
                    hide();
                    sendSelectedUtxos(treeTableView, hashIndexEntry);
@@ -444,6 +511,7 @@ public class EntryCell extends TreeTableCell<Entry, Entry> {
            if(hashIndexEntry.getType().equals(HashIndexEntry.Type.OUTPUT) && !hashIndexEntry.getHashIndex().isSpent()) {
                if(hashIndexEntry.getHashIndex().getStatus() == null || hashIndexEntry.getHashIndex().getStatus() != Status.FROZEN) {
                    MenuItem freezeUtxo = new MenuItem("Freeze UTXO");
+                    freezeUtxo.setGraphic(getFreezeGlyph());
                    freezeUtxo.setOnAction(AE -> {
                        hide();
                        freezeUtxo(hashIndexEntry);
@@ -451,6 +519,7 @@ public class EntryCell extends TreeTableCell<Entry, Entry> {
                    getItems().add(freezeUtxo);
                } else {
                    MenuItem unfreezeUtxo = new MenuItem("Unfreeze UTXO");
+                    unfreezeUtxo.setGraphic(getUnfreezeGlyph());
                    unfreezeUtxo.setOnAction(AE -> {
                        hide();
                        unfreezeUtxo(hashIndexEntry);
@@ -458,6 +527,16 @@ public class EntryCell extends TreeTableCell<Entry, Entry> {
                    getItems().add(unfreezeUtxo);
                }
            }
+
+            String label = "Copy " + (hashIndexEntry.getType().equals(HashIndexEntry.Type.OUTPUT) ? "Transaction Output" : "Transaction Input");
+            MenuItem copyHashIndex = new MenuItem(label);
+            copyHashIndex.setOnAction(AE -> {
+                hide();
+                ClipboardContent content = new ClipboardContent();
+                content.putString(hashIndexEntry.getHashIndex().toString());
+                Clipboard.getSystemClipboard().setContent(content);
+            });
+            getItems().add(copyHashIndex);
        }
    }

@@ -4,6 +4,7 @@ import com.google.gson.JsonParseException;
 import com.sparrowwallet.drongo.crypto.InvalidPasswordException;
 import com.sparrowwallet.drongo.protocol.ScriptType;
 import com.sparrowwallet.drongo.wallet.Keystore;
+import com.sparrowwallet.drongo.wallet.KeystoreSource;
 import com.sparrowwallet.drongo.wallet.Wallet;
 import com.sparrowwallet.sparrow.AppServices;
 import com.sparrowwallet.sparrow.glyphfont.FontAwesome5;
@@ -113,8 +114,9 @@ public abstract class FileImportPane extends TitledDescriptionPane {
                    importButton.setDisable(true);
                    setExpanded(true);
                } else {
-                    InputStream inputStream = new BufferedInputStream(new FileInputStream(file));
-                    importFile(file.getName(), inputStream, password);
+                    try(InputStream inputStream = new BufferedInputStream(new FileInputStream(file))) {
+                        importFile(file.getName(), inputStream, password);
+                    };
                }
            } catch (Exception e) {
                log.error("Error importing file", e);
@@ -171,11 +173,15 @@ public abstract class FileImportPane extends TitledDescriptionPane {
        if(wallets != null) {
            for(Wallet wallet : wallets) {
                if(scriptType.equals(wallet.getScriptType()) && !wallet.getKeystores().isEmpty()) {
-                    return wallet.getKeystores().get(0);
+                    Keystore keystore = wallet.getKeystores().get(0);
+                    keystore.setLabel(importer.getName().replace(" Multisig", ""));
+                    keystore.setSource(KeystoreSource.HW_AIRGAPPED);
+                    keystore.setWalletModel(importer.getWalletModel());
+                    return keystore;
                }
            }

-            throw new ImportException("Script type " + scriptType + " is not supported");
+            throw new ImportException("Script type " + scriptType.getDescription() + " is not supported in this QR. Check you are displaying the correct QR code.");
        }

        return null;
@@ -9,10 +9,7 @@ import com.sparrowwallet.sparrow.event.StorageEvent;
 import com.sparrowwallet.sparrow.event.TimedEvent;
 import com.sparrowwallet.sparrow.event.WalletExportEvent;
 import com.sparrowwallet.sparrow.glyphfont.FontAwesome5;
-import com.sparrowwallet.sparrow.io.CoboVaultMultisig;
-import com.sparrowwallet.sparrow.io.PassportMultisig;
-import com.sparrowwallet.sparrow.io.Storage;
-import com.sparrowwallet.sparrow.io.WalletExport;
+import com.sparrowwallet.sparrow.io.*;
 import javafx.geometry.Pos;
 import javafx.scene.control.Button;
 import javafx.scene.control.Control;
@@ -83,8 +80,8 @@ public class FileWalletExportPane extends TitledDescriptionPane {
        FileChooser fileChooser = new FileChooser();
        fileChooser.setTitle("Export " + exporter.getWalletModel().toDisplayString() + " File");
        String extension = exporter.getExportFileExtension(wallet);
-        fileChooser.setInitialFileName(wallet.getName() + "-" +
-                exporter.getWalletModel().toDisplayString().toLowerCase().replace(" ", "") +
+        fileChooser.setInitialFileName(wallet.getName() +
+                (exporter instanceof Sparrow ? "" : "-" + exporter.getWalletModel().toDisplayString().toLowerCase().replace(" ", "")) +
                (extension == null || extension.isEmpty() ? "" : "." + extension));

        AppServices.moveToActiveWindowScreen(window, 800, 450);
@@ -100,10 +97,10 @@ public class FileWalletExportPane extends TitledDescriptionPane {
            WalletPasswordDialog dlg = new WalletPasswordDialog(wallet.getName(), WalletPasswordDialog.PasswordRequirement.LOAD);
            Optional<SecureString> password = dlg.showAndWait();
            if(password.isPresent()) {
-                final File walletFile = AppServices.get().getOpenWallets().get(wallet).getWalletFile();
+                final String walletId = AppServices.get().getOpenWallets().get(wallet).getWalletId(wallet);
                Storage.DecryptWalletService decryptWalletService = new Storage.DecryptWalletService(copy, password.get());
                decryptWalletService.setOnSucceeded(workerStateEvent -> {
-                    EventManager.get().post(new StorageEvent(walletFile, TimedEvent.Action.END, "Done"));
+                    EventManager.get().post(new StorageEvent(walletId, TimedEvent.Action.END, "Done"));
                    Wallet decryptedWallet = decryptWalletService.getValue();

                    try {
@@ -113,10 +110,10 @@ public class FileWalletExportPane extends TitledDescriptionPane {
                    }
                });
                decryptWalletService.setOnFailed(workerStateEvent -> {
-                    EventManager.get().post(new StorageEvent(walletFile, TimedEvent.Action.END, "Failed"));
+                    EventManager.get().post(new StorageEvent(walletId, TimedEvent.Action.END, "Failed"));
                    setError("Export Error", decryptWalletService.getException().getMessage());
                });
-                EventManager.get().post(new StorageEvent(walletFile, TimedEvent.Action.START, "Decrypting wallet..."));
+                EventManager.get().post(new StorageEvent(walletId, TimedEvent.Action.START, "Decrypting wallet..."));
                decryptWalletService.start();
            }
        } else {
@@ -127,16 +124,17 @@ public class FileWalletExportPane extends TitledDescriptionPane {
    private void exportWallet(File file, Wallet exportWallet) {
        try {
            if(file != null) {
-                OutputStream outputStream = new FileOutputStream(file);
-                exporter.exportWallet(exportWallet, outputStream);
-                EventManager.get().post(new WalletExportEvent(exportWallet));
+                try(OutputStream outputStream = new FileOutputStream(file)) {
+                    exporter.exportWallet(exportWallet, outputStream);
+                    EventManager.get().post(new WalletExportEvent(exportWallet));
+                }
            } else {
                ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
                exporter.exportWallet(exportWallet, outputStream);
                QRDisplayDialog qrDisplayDialog;
                if(exporter instanceof CoboVaultMultisig) {
                    qrDisplayDialog = new QRDisplayDialog(RegistryType.BYTES.toString(), outputStream.toByteArray(), true);
-                } else if(exporter instanceof PassportMultisig) {
+                } else if(exporter instanceof PassportMultisig || exporter instanceof KeystoneMultisig) {
                    qrDisplayDialog = new QRDisplayDialog(RegistryType.BYTES.toString(), outputStream.toByteArray(), false);
                } else {
                    qrDisplayDialog = new QRDisplayDialog(outputStream.toString(StandardCharsets.UTF_8));
@@ -6,6 +6,7 @@ import javafx.scene.control.*;
 import javafx.scene.control.cell.TextFieldTreeTableCell;
 import javafx.scene.input.Clipboard;
 import javafx.scene.input.ClipboardContent;
+import javafx.scene.input.DataFormat;
 import javafx.util.converter.DefaultStringConverter;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -28,10 +29,11 @@ class LabelCell extends TextFieldTreeTableCell<Entry, String> {
            setText(null);
            setGraphic(null);
        } else {
-            EntryCell.applyRowStyles(this, getTreeTableView().getTreeItem(getIndex()).getValue());
+            Entry entry = getTreeTableView().getTreeItem(getIndex()).getValue();
+            EntryCell.applyRowStyles(this, entry);

            setText(label);
-            setContextMenu(new LabelContextMenu(label));
+            setContextMenu(new LabelContextMenu(entry, label));
        }
    }

@@ -80,7 +82,7 @@ class LabelCell extends TextFieldTreeTableCell<Entry, String> {
    }

    private static class LabelContextMenu extends ContextMenu {
-        public LabelContextMenu(String label) {
+        public LabelContextMenu(Entry entry, String label) {
            MenuItem copyLabel = new MenuItem("Copy Label");
            copyLabel.setOnAction(AE -> {
                hide();
@@ -88,8 +90,20 @@ class LabelCell extends TextFieldTreeTableCell<Entry, String> {
                content.putString(label);
                Clipboard.getSystemClipboard().setContent(content);
            });
-
            getItems().add(copyLabel);
+
+            Object content = Clipboard.getSystemClipboard().getContent(DataFormat.PLAIN_TEXT);
+            if(content instanceof String) {
+                MenuItem pasteLabel = new MenuItem("Paste Label");
+                pasteLabel.setOnAction(AE -> {
+                    hide();
+                    Object currentContent = Clipboard.getSystemClipboard().getContent(DataFormat.PLAIN_TEXT);
+                    if(currentContent instanceof String) {
+                        entry.labelProperty().set((String)currentContent);
+                    }
+                });
+                getItems().add(pasteLabel);
+            }
        }
    }
 }
@@ -34,6 +34,7 @@ import tornadofx.control.Fieldset;
 import tornadofx.control.Form;

 import java.security.SignatureException;
+import java.util.Arrays;
 import java.util.List;
 import java.util.Optional;

@@ -45,6 +46,7 @@ public class MessageSignDialog extends Dialog<ButtonBar.ButtonData> {
    private final TextArea signature;
    private final Wallet wallet;
    private WalletNode walletNode;
+    private boolean electrumSignatureFormat;

    /**
     * Verification only constructor
@@ -69,6 +71,19 @@ public class MessageSignDialog extends Dialog<ButtonBar.ButtonData> {
     * @param walletNode Wallet node to derive address from
     */
    public MessageSignDialog(Wallet wallet, WalletNode walletNode) {
+        this(wallet, walletNode, null, null);
+    }
+
+    /**
+     * Sign and verify with preset address, and supplied title, message and dialog buttons
+     *
+     * @param wallet Wallet to sign with
+     * @param walletNode Wallet node to derive address from
+     * @param title Header text of dialog
+     * @param msg Message to sign (all fields will be made uneditable)
+     * @param buttons The dialog buttons to display. If one contains the text "sign" it will trigger the signing process
+     */
+    public MessageSignDialog(Wallet wallet, WalletNode walletNode, String title, String msg, ButtonType... buttons) {
        if(wallet != null) {
            if(wallet.getKeystores().size() != 1) {
                throw new IllegalArgumentException("Cannot sign messages using a wallet with multiple keystores - a single key is required");
@@ -84,7 +99,7 @@ public class MessageSignDialog extends Dialog<ButtonBar.ButtonData> {
        final DialogPane dialogPane = getDialogPane();
        dialogPane.getStylesheets().add(AppServices.class.getResource("general.css").toExternalForm());
        AppServices.setStageIcon(dialogPane.getScene().getWindow());
-        dialogPane.setHeaderText(wallet == null ? "Verify Message" : "Sign/Verify Message");
+        dialogPane.setHeaderText(title == null ? (wallet == null ? "Verify Message" : "Sign/Verify Message") : title);

        Image image = new Image("image/seed.png", 50, 50, false, false);
        if (!image.isError()) {
@@ -133,47 +148,70 @@ public class MessageSignDialog extends Dialog<ButtonBar.ButtonData> {
        form.getChildren().add(fieldset);
        dialogPane.setContent(form);

+        if(msg != null) {
+            message.setText(msg);
+            address.setEditable(false);
+            message.setEditable(false);
+            signature.setEditable(false);
+        }
+
        ButtonType signButtonType = new javafx.scene.control.ButtonType("Sign", ButtonBar.ButtonData.BACK_PREVIOUS);
        ButtonType verifyButtonType = new javafx.scene.control.ButtonType("Verify", ButtonBar.ButtonData.NEXT_FORWARD);
        ButtonType doneButtonType = new javafx.scene.control.ButtonType("Done", ButtonBar.ButtonData.OK_DONE);
-        dialogPane.getButtonTypes().addAll(signButtonType, verifyButtonType, doneButtonType);

-        Button signButton = (Button)dialogPane.lookupButton(signButtonType);
-        signButton.setDisable(wallet == null);
-        signButton.setOnAction(event -> {
-            signMessage();
-        });
+        if(buttons.length > 0) {
+            dialogPane.getButtonTypes().addAll(buttons);

-        Button verifyButton = (Button)dialogPane.lookupButton(verifyButtonType);
-        verifyButton.setDefaultButton(false);
-        verifyButton.setOnAction(event -> {
-            verifyMessage();
-        });
-
-        boolean validAddress = isValidAddress();
-        signButton.setDisable(!validAddress || (wallet == null));
-        verifyButton.setDisable(!validAddress);
-
-        ValidationSupport validationSupport = new ValidationSupport();
-        Platform.runLater(() -> {
-            validationSupport.registerValidator(address, (Control c, String newValue) -> ValidationResult.fromErrorIf(c, "Invalid address", !isValidAddress()));
-            validationSupport.setValidationDecorator(new StyleClassValidationDecoration());
-        });
-
-        address.textProperty().addListener((observable, oldValue, newValue) -> {
-            boolean valid = isValidAddress();
-            signButton.setDisable(!valid || (wallet == null));
-            verifyButton.setDisable(!valid);
-
-            if(valid && wallet != null) {
-                try {
-                    Address address = getAddress();
-                    setWalletNodeFromAddress(wallet, address);
-                } catch(InvalidAddressException e) {
-                    //can't happen
-                }
+            ButtonType customSignButtonType = Arrays.stream(buttons).filter(buttonType -> buttonType.getText().toLowerCase().contains("sign")).findFirst().orElse(null);
+            if(customSignButtonType != null) {
+                Button customSignButton = (Button)dialogPane.lookupButton(customSignButtonType);
+                customSignButton.setDefaultButton(true);
+                customSignButton.setOnAction(event -> {
+                    customSignButton.setDisable(true);
+                    signMessage();
+                    setResult(ButtonBar.ButtonData.OK_DONE);
+                });
            }
-        });
+        } else {
+            dialogPane.getButtonTypes().addAll(signButtonType, verifyButtonType, doneButtonType);
+
+            Button signButton = (Button) dialogPane.lookupButton(signButtonType);
+            signButton.setDisable(wallet == null);
+            signButton.setOnAction(event -> {
+                signMessage();
+            });
+
+            Button verifyButton = (Button) dialogPane.lookupButton(verifyButtonType);
+            verifyButton.setDefaultButton(false);
+            verifyButton.setOnAction(event -> {
+                verifyMessage();
+            });
+
+            boolean validAddress = isValidAddress();
+            signButton.setDisable(!validAddress || (wallet == null));
+            verifyButton.setDisable(!validAddress);
+
+            ValidationSupport validationSupport = new ValidationSupport();
+            Platform.runLater(() -> {
+                validationSupport.setValidationDecorator(new StyleClassValidationDecoration());
+                validationSupport.registerValidator(address, (Control c, String newValue) -> ValidationResult.fromErrorIf(c, "Invalid address", !isValidAddress()));
+            });
+
+            address.textProperty().addListener((observable, oldValue, newValue) -> {
+                boolean valid = isValidAddress();
+                signButton.setDisable(!valid || (wallet == null));
+                verifyButton.setDisable(!valid);
+
+                if(valid && wallet != null) {
+                    try {
+                        Address address = getAddress();
+                        setWalletNodeFromAddress(wallet, address);
+                    } catch(InvalidAddressException e) {
+                        //can't happen
+                    }
+                }
+            });
+        }

        EventManager.get().register(this);
        setOnCloseRequest(event -> {
@@ -186,13 +224,26 @@ public class MessageSignDialog extends Dialog<ButtonBar.ButtonData> {
        });

        AppServices.moveToActiveWindowScreen(this);
-        setResultConverter(dialogButton -> dialogButton == signButtonType || dialogButton == verifyButtonType ? ButtonBar.ButtonData.APPLY : ButtonBar.ButtonData.OK_DONE);
+        setResultConverter(dialogButton -> dialogButton == signButtonType || dialogButton == verifyButtonType ? ButtonBar.ButtonData.APPLY : dialogButton.getButtonData());
    }

    private Address getAddress()throws InvalidAddressException {
        return Address.fromString(address.getText());
    }

+    public String getSignature() {
+        return signature.getText();
+    }
+
+    /**
+     * Use the Electrum signing format, which uses the non-segwit compressed signing parameters for both segwit types (p2sh-p2wpkh and p2wpkh)
+     *
+     * @param electrumSignatureFormat
+     */
+    public void setElectrumSignatureFormat(boolean electrumSignatureFormat) {
+        this.electrumSignatureFormat = electrumSignatureFormat;
+    }
+
    private boolean isValidAddress() {
        try {
            getAddress();
@@ -228,7 +279,8 @@ public class MessageSignDialog extends Dialog<ButtonBar.ButtonData> {
            //Note we can expect a single keystore due to the check above
            Keystore keystore = decryptedWallet.getKeystores().get(0);
            ECKey privKey = keystore.getKey(walletNode);
-            String signatureText = privKey.signMessage(message.getText().trim(), decryptedWallet.getScriptType(), null);
+            ScriptType scriptType = electrumSignatureFormat ? ScriptType.P2PKH : decryptedWallet.getScriptType();
+            String signatureText = privKey.signMessage(message.getText().trim(), scriptType, null);
            signature.clear();
            signature.appendText(signatureText);
            privKey.clear();
@@ -316,16 +368,16 @@ public class MessageSignDialog extends Dialog<ButtonBar.ButtonData> {
        if(password.isPresent()) {
            Storage.DecryptWalletService decryptWalletService = new Storage.DecryptWalletService(wallet.copy(), password.get());
            decryptWalletService.setOnSucceeded(workerStateEvent -> {
-                EventManager.get().post(new StorageEvent(storage.getWalletFile(), TimedEvent.Action.END, "Done"));
+                EventManager.get().post(new StorageEvent(storage.getWalletId(wallet), TimedEvent.Action.END, "Done"));
                Wallet decryptedWallet = decryptWalletService.getValue();
                signUnencryptedKeystore(decryptedWallet);
                decryptedWallet.clearPrivate();
            });
            decryptWalletService.setOnFailed(workerStateEvent -> {
-                EventManager.get().post(new StorageEvent(storage.getWalletFile(), TimedEvent.Action.END, "Failed"));
+                EventManager.get().post(new StorageEvent(storage.getWalletId(wallet), TimedEvent.Action.END, "Failed"));
                AppServices.showErrorDialog("Incorrect Password", decryptWalletService.getException().getMessage());
            });
-            EventManager.get().post(new StorageEvent(storage.getWalletFile(), TimedEvent.Action.START, "Decrypting wallet..."));
+            EventManager.get().post(new StorageEvent(storage.getWalletId(wallet), TimedEvent.Action.START, "Decrypting wallet..."));
            decryptWalletService.start();
        }
    }
@@ -36,7 +36,6 @@ import java.security.NoSuchAlgorithmException;
 import java.security.SecureRandom;
 import java.util.ArrayList;
 import java.util.Collection;
-import java.util.Collections;
 import java.util.List;

 public class MnemonicKeystoreImportPane extends TitledDescriptionPane {
@@ -159,15 +158,20 @@ public class MnemonicKeystoreImportPane extends TitledDescriptionPane {

        ObservableList<String> wordEntryList = FXCollections.observableArrayList(words);
        wordEntriesProperty = new SimpleListProperty<>(wordEntryList);
+        List<WordEntry> wordEntries = new ArrayList<>(numWords);
        for(int i = 0; i < numWords; i++) {
-            WordEntry wordEntry = new WordEntry(i, wordEntryList);
-            wordsPane.getChildren().add(wordEntry);
+            wordEntries.add(new WordEntry(i, wordEntryList));
        }
+        for(int i = 0; i < numWords - 1; i++) {
+            wordEntries.get(i).setNext(wordEntries.get(i + 1).getEditor());
+        }
+        wordsPane.getChildren().addAll(wordEntries);

        vBox.getChildren().add(wordsPane);

        if(!displayWordsOnly) {
            PassphraseEntry passphraseEntry = new PassphraseEntry();
+            wordEntries.get(wordEntries.size() - 1).setNext(passphraseEntry.getEditor());
            passphraseEntry.setPadding(new Insets(0, 26, 10, 10));
            vBox.getChildren().add(passphraseEntry);

@@ -397,6 +401,7 @@ public class MnemonicKeystoreImportPane extends TitledDescriptionPane {
    private static class WordEntry extends HBox {
        private static List<String> wordList;
        private final TextField wordField;
+        private Node next;

        public WordEntry(int wordNumber, ObservableList<String> wordEntryList) {
            super();
@@ -425,13 +430,18 @@ public class MnemonicKeystoreImportPane extends TitledDescriptionPane {
            wordList = Bip39MnemonicCode.INSTANCE.getWordList();
            AutoCompletionBinding<String> autoCompletionBinding = TextFields.bindAutoCompletion(wordField, new WordlistSuggestionProvider(wordList));
            autoCompletionBinding.setDelay(50);
+            autoCompletionBinding.setOnAutoCompleted(event -> {
+                if (next != null) {
+                    next.requestFocus();
+                }
+            });

            ValidationSupport validationSupport = new ValidationSupport();
+            validationSupport.setValidationDecorator(new StyleClassValidationDecoration());
            validationSupport.registerValidator(wordField, Validator.combine(
                    Validator.createEmptyValidator("Word is required"),
                    (Control c, String newValue) -> ValidationResult.fromErrorIf( c, "Invalid word", !wordList.contains(newValue))
            ));
-            validationSupport.setValidationDecorator(new StyleClassValidationDecoration());

            wordField.textProperty().addListener((observable, oldValue, newValue) -> {
                wordEntryList.set(wordNumber, newValue);
@@ -444,6 +454,10 @@ public class MnemonicKeystoreImportPane extends TitledDescriptionPane {
            return wordField;
        }

+        public void setNext(Node node) {
+            next = node;
+        }
+
        public static boolean isValid(String word) {
            return wordList.contains(word);
        }
@@ -461,10 +475,6 @@ public class MnemonicKeystoreImportPane extends TitledDescriptionPane {
            List<String> suggestions = new ArrayList<>();
            if(!request.getUserText().isEmpty()) {
                for(String word : wordList) {
-                    if(word.equals(request.getUserText())) {
-                        return Collections.emptyList();
-                    }
-
                    if(word.startsWith(request.getUserText())) {
                        suggestions.add(word);
                    }
@@ -476,13 +486,15 @@ public class MnemonicKeystoreImportPane extends TitledDescriptionPane {
    }

    private class PassphraseEntry extends HBox {
+        private final CustomTextField passphraseField;
+
        public PassphraseEntry() {
            super();

            setAlignment(Pos.CENTER_LEFT);
            setSpacing(10);
            Label passphraseLabel = new Label("Passphrase:");
-            CustomTextField passphraseField = (CustomTextField) TextFields.createClearableTextField();
+            passphraseField = (CustomTextField) TextFields.createClearableTextField();
            passphraseProperty.bind(passphraseField.textProperty());
            passphraseField.setPromptText("Leave blank for none");

@@ -492,6 +504,10 @@ public class MnemonicKeystoreImportPane extends TitledDescriptionPane {

            getChildren().addAll(passphraseLabel, passphraseField, helpLabel);
        }
+
+        public TextField getEditor() {
+            return passphraseField;
+        }
    }

    private Node getDerivationEntry(List<ChildNumber> derivation) {
@@ -501,11 +517,11 @@ public class MnemonicKeystoreImportPane extends TitledDescriptionPane {
        HBox.setHgrow(derivationField, Priority.ALWAYS);

        ValidationSupport validationSupport = new ValidationSupport();
+        validationSupport.setValidationDecorator(new StyleClassValidationDecoration());
        validationSupport.registerValidator(derivationField, Validator.combine(
                Validator.createEmptyValidator("Derivation is required"),
                (Control c, String newValue) -> ValidationResult.fromErrorIf( c, "Invalid derivation", !KeyDerivation.isValid(newValue))
        ));
-        validationSupport.setValidationDecorator(new StyleClassValidationDecoration());

        Button importDerivationButton = new Button("Import Custom Derivation Keystore");
        importDerivationButton.setDisable(true);
@@ -113,7 +113,19 @@ public class QRScanDialog extends Dialog<QRScanDialog.Result> {

        webcamService.resultProperty().addListener(new QRResultListener());
        webcamService.setOnFailed(failedEvent -> {
-            Platform.runLater(() -> setResult(new Result(failedEvent.getSource().getException())));
+            Throwable exception = failedEvent.getSource().getException();
+
+            Throwable nested = exception;
+            while(nested.getCause() != null) {
+                nested = nested.getCause();
+            }
+            if(org.controlsfx.tools.Platform.getCurrent() == org.controlsfx.tools.Platform.WINDOWS &&
+                    nested.getMessage().startsWith("Library 'OpenIMAJGrabber' was not loaded successfully from file")) {
+                exception = new WebcamDependencyException("Your system is missing a dependency required for the webcam. Follow the link below for more details.\n\n[https://sparrowwallet.com/docs/faq.html#your-system-is-missing-a-dependency-for-the-webcam]", exception);
+            }
+
+            final Throwable result = exception;
+            Platform.runLater(() -> setResult(new Result(result)));
        });
        webcamService.start();
        webcamResolutionProperty.addListener((observable, oldValue, newResolution) -> {
@@ -168,7 +180,7 @@ public class QRScanDialog extends Dialog<QRScanDialog.Result> {
                    }
                } else {
                    decoder.receivePart(qrtext);
-                    Platform.runLater(() -> percentComplete.setValue(decoder.getEstimatedPercentComplete()));
+                    Platform.runLater(() -> percentComplete.setValue(decoder.getProcessedPartsCount() > 0 ? decoder.getEstimatedPercentComplete() : 0));

                    if(decoder.getResult() != null) {
                        URDecoder.Result urResult = decoder.getResult();
@@ -197,7 +209,7 @@ public class QRScanDialog extends Dialog<QRScanDialog.Result> {
                if(parts.stream().filter(Objects::nonNull).count() == n) {
                    String complete = String.join("", parts);
                    try {
-                        PSBT psbt = PSBT.fromString(complete);
+                        PSBT psbt = PSBT.fromString(complete, false);
                        result = new Result(psbt);
                        return;
                    } catch(PSBTParseException e) {
@@ -249,7 +261,7 @@ public class QRScanDialog extends Dialog<QRScanDialog.Result> {
                }

                try {
-                    psbt = PSBT.fromString(qrtext);
+                    psbt = PSBT.fromString(qrtext, false);
                    result = new Result(psbt);
                    return;
                } catch(PSBTParseException e) {
@@ -261,7 +273,7 @@ public class QRScanDialog extends Dialog<QRScanDialog.Result> {
                }

                try {
-                    psbt = new PSBT(qrResult.getRawBytes());
+                    psbt = new PSBT(qrResult.getRawBytes(), false);
                    result = new Result(psbt);
                    return;
                } catch(Exception e) {
@@ -286,7 +298,7 @@ public class QRScanDialog extends Dialog<QRScanDialog.Result> {

                //Try Base43 used by Electrum
                try {
-                    psbt = new PSBT(Base43.decode(qrtext));
+                    psbt = new PSBT(Base43.decode(qrtext), false);
                    result = new Result(psbt);
                    return;
                } catch(Exception e) {
@@ -312,7 +324,7 @@ public class QRScanDialog extends Dialog<QRScanDialog.Result> {
                if(urRegistryType.equals(RegistryType.BYTES)) {
                    byte[] urBytes = (byte[])ur.decodeFromRegistry();
                    try {
-                        PSBT psbt = new PSBT(urBytes);
+                        PSBT psbt = new PSBT(urBytes, false);
                        return new Result(psbt);
                    } catch(PSBTParseException e) {
                        if(PSBT.isPSBT(urBytes)) {
@@ -342,7 +354,7 @@ public class QRScanDialog extends Dialog<QRScanDialog.Result> {
                } else if(urRegistryType.equals(RegistryType.CRYPTO_PSBT)) {
                    CryptoPSBT cryptoPSBT = (CryptoPSBT)ur.decodeFromRegistry();
                    try {
-                        PSBT psbt = new PSBT(cryptoPSBT.getPsbt());
+                        PSBT psbt = new PSBT(cryptoPSBT.getPsbt(), false);
                        return new Result(psbt);
                    } catch(Exception e) {
                        log.error("Error parsing PSBT from UR type " + urRegistryType, e);
@@ -457,7 +469,7 @@ public class QRScanDialog extends Dialog<QRScanDialog.Result> {
                ExtendedKey extendedKey = outputDescriptor.getSingletonExtendedPublicKey();
                wallet.setScriptType(outputDescriptor.getScriptType());
                Keystore keystore = new Keystore();
-                keystore.setKeyDerivation(new KeyDerivation(masterFingerprint, outputDescriptor.getKeyDerivation(extendedKey).getDerivationPath()));
+                keystore.setKeyDerivation(new KeyDerivation(masterFingerprint, KeyDerivation.writePath(outputDescriptor.getKeyDerivation(extendedKey).getDerivation())));
                keystore.setExtendedPublicKey(extendedKey);
                wallet.getKeystores().add(keystore);
                wallets.add(wallet);
@@ -715,6 +727,24 @@ public class QRScanDialog extends Dialog<QRScanDialog.Result> {
        }
    }

+    public static class WebcamDependencyException extends ScanException {
+        public WebcamDependencyException() {
+            super();
+        }
+
+        public WebcamDependencyException(String message) {
+            super(message);
+        }
+
+        public WebcamDependencyException(Throwable cause) {
+            super(cause);
+        }
+
+        public WebcamDependencyException(String message, Throwable cause) {
+            super(message, cause);
+        }
+    }
+
    public static class ScanDelayCalculator implements WebcamUpdater.DelayCalculator {
        public long calculateDelay(long snapshotDuration, double deviceFps) {
            return Math.max(SCAN_PERIOD_MILLIS - snapshotDuration, 0L);
@@ -0,0 +1,302 @@
+package com.sparrowwallet.sparrow.control;
+
+import com.csvreader.CsvReader;
+import com.sparrowwallet.drongo.BitcoinUnit;
+import com.sparrowwallet.drongo.address.Address;
+import com.sparrowwallet.drongo.address.InvalidAddressException;
+import com.sparrowwallet.drongo.protocol.Transaction;
+import com.sparrowwallet.drongo.wallet.Payment;
+import com.sparrowwallet.sparrow.AppServices;
+import com.sparrowwallet.sparrow.glyphfont.FontAwesome5;
+import javafx.collections.FXCollections;
+import javafx.collections.ObservableList;
+import javafx.scene.Node;
+import javafx.scene.control.*;
+import javafx.scene.image.Image;
+import javafx.scene.image.ImageView;
+import javafx.scene.layout.StackPane;
+import javafx.stage.FileChooser;
+import javafx.util.StringConverter;
+import org.controlsfx.control.spreadsheet.*;
+import org.controlsfx.glyphfont.Glyph;
+import org.controlsfx.tools.Platform;
+
+import java.io.*;
+import java.nio.charset.StandardCharsets;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.stream.Collectors;
+import java.util.stream.IntStream;
+
+public class SendToManyDialog extends Dialog<List<Payment>> {
+    private final BitcoinUnit bitcoinUnit;
+    private final SpreadsheetView spreadsheetView;
+    public static final AddressCellType ADDRESS = new AddressCellType();
+
+    public SendToManyDialog(BitcoinUnit bitcoinUnit) {
+        this.bitcoinUnit = bitcoinUnit;
+
+        final DialogPane dialogPane = new SendToManyDialogPane();
+        setDialogPane(dialogPane);
+        setTitle("Send to Many");
+        dialogPane.getStylesheets().add(AppServices.class.getResource("general.css").toExternalForm());
+        dialogPane.setHeaderText("Send to many recipients by specifying addresses and amounts.\nOnly the first row's label is necessary.");
+        Image image = new Image("/image/sparrow-small.png");
+        dialogPane.setGraphic(new ImageView(image));
+
+        List<Payment> initialPayments = IntStream.range(0, 100).mapToObj(i -> new Payment(null, null, -1, false)).collect(Collectors.toList());
+        Grid grid = getGrid(initialPayments);
+
+        spreadsheetView = new SpreadsheetView(grid);
+        spreadsheetView.getColumns().get(0).setPrefWidth(400);
+        spreadsheetView.getColumns().get(1).setPrefWidth(150);
+        spreadsheetView.getColumns().get(2).setPrefWidth(247);
+
+        StackPane stackPane = new StackPane();
+        stackPane.getChildren().add(spreadsheetView);
+        dialogPane.setContent(stackPane);
+
+        dialogPane.getButtonTypes().addAll(ButtonType.OK, ButtonType.CANCEL);
+
+        final ButtonType loadCsvButtonType = new javafx.scene.control.ButtonType("Load CSV", ButtonBar.ButtonData.LEFT);
+        dialogPane.getButtonTypes().add(loadCsvButtonType);
+
+        setResultConverter((dialogButton) -> {
+            ButtonBar.ButtonData data = dialogButton == null ? null : dialogButton.getButtonData();
+            return data == ButtonBar.ButtonData.OK_DONE ? getPayments() : null;
+        });
+
+        dialogPane.setPrefWidth(850);
+        dialogPane.setPrefHeight(500);
+        AppServices.setStageIcon(dialogPane.getScene().getWindow());
+        AppServices.moveToActiveWindowScreen(this);
+    }
+
+    private Grid getGrid(List<Payment> payments) {
+        int rowCount = payments.size();
+        int columnCount = 3;
+        GridBase grid = new GridBase(rowCount, columnCount);
+        ObservableList<ObservableList<SpreadsheetCell>> rows = FXCollections.observableArrayList();
+        for(int row = 0; row < grid.getRowCount(); ++row) {
+            final ObservableList<SpreadsheetCell> list = FXCollections.observableArrayList();
+
+            SpreadsheetCell addressCell = ADDRESS.createCell(row, 0, 1, 1, payments.get(row).getAddress());
+            addressCell.getStyleClass().add("fixed-width");
+            list.add(addressCell);
+
+            double amount = (double)payments.get(row).getAmount();
+            if(bitcoinUnit == BitcoinUnit.BTC) {
+                amount = amount / Transaction.SATOSHIS_PER_BITCOIN;
+            }
+            SpreadsheetCell amountCell = SpreadsheetCellType.DOUBLE.createCell(row, 1, 1, 1, amount < 0 ? null : amount);
+            amountCell.setFormat(bitcoinUnit == BitcoinUnit.BTC ? "0.00000000" : "###,###");
+            amountCell.getStyleClass().add("number-value");
+            if(Platform.getCurrent() == Platform.OSX) {
+                amountCell.getStyleClass().add("number-field");
+            }
+            list.add(amountCell);
+
+            list.add(SpreadsheetCellType.STRING.createCell(row, 2, 1, 1, payments.get(row).getLabel()));
+            rows.add(list);
+        }
+        grid.setRows(rows);
+        grid.getColumnHeaders().setAll("Address", "Amount (" + bitcoinUnit.getLabel() + ")", "Label");
+
+        return grid;
+    }
+
+    private List<Payment> getPayments() {
+        List<Payment> payments = new ArrayList<>();
+        Grid grid = spreadsheetView.getGrid();
+        String firstLabel = null;
+        for(int row = 0; row < grid.getRowCount(); row++) {
+            ObservableList<SpreadsheetCell> rowCells = spreadsheetView.getItems().get(row);
+            Address address = (Address)rowCells.get(0).getItem();
+            Double value = (Double)rowCells.get(1).getItem();
+            String label = (String)rowCells.get(2).getItem();
+            if(firstLabel == null) {
+                firstLabel = label;
+            }
+            if(label == null || label.isEmpty()) {
+                label = firstLabel;
+            }
+
+            if(address != null && value != null) {
+                if(bitcoinUnit == BitcoinUnit.BTC) {
+                    value = value * Transaction.SATOSHIS_PER_BITCOIN;
+                }
+
+                payments.add(new Payment(address, label, value.longValue(), false));
+            }
+        }
+
+        return payments;
+    }
+
+    private class SendToManyDialogPane extends DialogPane {
+        @Override
+        protected Node createButton(ButtonType buttonType) {
+            Node button;
+            if(buttonType.getButtonData() == ButtonBar.ButtonData.LEFT) {
+                Button loadButton = new Button(buttonType.getText());
+                loadButton.setGraphicTextGap(5);
+                loadButton.setGraphic(getGlyph(FontAwesome5.Glyph.ARROW_UP));
+                final ButtonBar.ButtonData buttonData = buttonType.getButtonData();
+                ButtonBar.setButtonData(loadButton, buttonData);
+                loadButton.setOnAction(event -> {
+                    FileChooser fileChooser = new FileChooser();
+                    fileChooser.setTitle("Open CSV");
+                    fileChooser.getExtensionFilters().addAll(
+                            new FileChooser.ExtensionFilter("All Files", org.controlsfx.tools.Platform.getCurrent().equals(org.controlsfx.tools.Platform.UNIX) ? "*" : "*.*"),
+                            new FileChooser.ExtensionFilter("CSV", "*.csv")
+                    );
+
+                    AppServices.moveToActiveWindowScreen(this.getScene().getWindow(), 800, 450);
+                    File file = fileChooser.showOpenDialog(this.getScene().getWindow());
+                    if(file != null) {
+                        try {
+                            List<Payment> csvPayments = new ArrayList<>();
+                            try(Reader reader = new FileReader(file, StandardCharsets.UTF_8)) {
+                                CsvReader csvReader = new CsvReader(reader);
+                                while(csvReader.readRecord()) {
+                                    if(csvReader.getColumnCount() < 2) {
+                                        continue;
+                                    }
+
+                                    try {
+                                        long amount;
+                                        if(bitcoinUnit == BitcoinUnit.BTC) {
+                                            double doubleAmount = Double.parseDouble(csvReader.get(1).replace(",", ""));
+                                            amount = (long)(doubleAmount * Transaction.SATOSHIS_PER_BITCOIN);
+                                        } else {
+                                            amount = Long.parseLong(csvReader.get(1).replace(",", ""));
+                                        }
+                                        Address address = Address.fromString(csvReader.get(0));
+                                        String label = csvReader.get(2);
+                                        csvPayments.add(new Payment(address, label, amount, false));
+                                    } catch(NumberFormatException e) {
+                                        //ignore and continue - probably a header line
+                                    } catch(InvalidAddressException e) {
+                                        AppServices.showErrorDialog("Invalid Address", e.getMessage());
+                                    }
+                                }
+
+                                if(csvPayments.isEmpty()) {
+                                    AppServices.showErrorDialog("No recipients found", "No valid recipients were found. Use a CSV file with three columns, and ensure amounts are in " + bitcoinUnit.getLabel() + ".");
+                                    return;
+                                }
+
+                                spreadsheetView.setGrid(getGrid(csvPayments));
+                            }
+                        } catch(IOException e) {
+                            AppServices.showErrorDialog("Cannot load CSV", e.getMessage());
+                        }
+                    }
+                });
+
+                button = loadButton;
+            } else {
+                button = super.createButton(buttonType);
+            }
+
+            return button;
+        }
+
+        private Glyph getGlyph(FontAwesome5.Glyph glyphName) {
+            Glyph glyph = new Glyph(FontAwesome5.FONT_NAME, glyphName);
+            glyph.setFontSize(11);
+            return glyph;
+        }
+    }
+
+    public static class AddressCellType extends SpreadsheetCellType<Address> {
+        public AddressCellType() {
+            this(new StringConverterWithFormat<>(new AddressStringConverter()) {
+                @Override
+                public String toString(Address item) {
+                    return toStringFormat(item, ""); //$NON-NLS-1$
+                }
+
+                @Override
+                public Address fromString(String str) {
+                    if(str == null || str.isEmpty()) { //$NON-NLS-1$
+                        return null;
+                    } else {
+                        return myConverter.fromString(str);
+                    }
+                }
+
+                @Override
+                public String toStringFormat(Address item, String format) {
+                    try {
+                        if(item == null) {
+                            return ""; //$NON-NLS-1$
+                        } else {
+                            return item.toString();
+                        }
+                    } catch (Exception ex) {
+                        return myConverter.toString(item);
+                    }
+                }
+            });
+        }
+
+        public AddressCellType(StringConverter<Address> converter) {
+            super(converter);
+        }
+
+        @Override
+        public String toString() {
+            return "address";
+        }
+
+        public SpreadsheetCell createCell(final int row, final int column, final int rowSpan, final int columnSpan,
+                                          final Address value) {
+            SpreadsheetCell cell = new SpreadsheetCellBase(row, column, rowSpan, columnSpan, this);
+            cell.setItem(value);
+            return cell;
+        }
+
+        @Override
+        public SpreadsheetCellEditor createEditor(SpreadsheetView view) {
+            return new SpreadsheetCellEditor.StringEditor(view);
+        }
+
+        @Override
+        public boolean match(Object value, Object... options) {
+            if(value instanceof Address)
+                return true;
+            else {
+                try {
+                    converter.fromString(value == null ? null : value.toString());
+                    return true;
+                } catch (Exception e) {
+                    return false;
+                }
+            }
+        }
+
+        @Override
+        public Address convertValue(Object value) {
+            if(value instanceof Address)
+                return (Address)value;
+            else {
+                try {
+                    return converter.fromString(value == null ? null : value.toString());
+                } catch (Exception e) {
+                    return null;
+                }
+            }
+        }
+
+        @Override
+        public String toString(Address item) {
+            return converter.toString(item);
+        }
+
+        @Override
+        public String toString(Address item, String format) {
+            return ((StringConverterWithFormat<Address>)converter).toStringFormat(item, format);
+        }
+    };
+}
@@ -12,10 +12,14 @@ import javafx.scene.image.ImageView;
 import javafx.scene.layout.HBox;
 import javafx.scene.layout.Priority;
 import org.controlsfx.glyphfont.Glyph;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;

 import java.util.Optional;

 public class TextAreaDialog extends Dialog<String> {
+    private static final Logger log = LoggerFactory.getLogger(TextAreaDialog.class);
+
    private final TextArea textArea;
    private final String defaultValue;

@@ -99,6 +103,7 @@ public class TextAreaDialog extends Dialog<String> {
                        } else if(result.outputDescriptor != null) {
                            textArea.setText(result.outputDescriptor.toString(true));
                        } else if(result.exception != null) {
+                            log.error("Error scanning QR", result.exception);
                            AppServices.showErrorDialog("Error scanning QR", result.exception.getMessage());
                        }
                    }
@@ -1,5 +1,6 @@
 package com.sparrowwallet.sparrow.control;

+import com.sparrowwallet.drongo.KeyPurpose;
 import com.sparrowwallet.drongo.address.Address;
 import com.sparrowwallet.drongo.protocol.Sha256Hash;
 import com.sparrowwallet.drongo.uri.BitcoinURI;
@@ -10,6 +11,7 @@ import com.sparrowwallet.drongo.wallet.WalletTransaction;
 import com.sparrowwallet.sparrow.AppServices;
 import com.sparrowwallet.sparrow.EventManager;
 import com.sparrowwallet.sparrow.event.ExcludeUtxoEvent;
+import com.sparrowwallet.sparrow.event.ReplaceChangeAddressEvent;
 import com.sparrowwallet.sparrow.glyphfont.FontAwesome5;
 import javafx.geometry.Insets;
 import javafx.geometry.Pos;
@@ -200,6 +202,7 @@ public class TransactionDiagram extends GridPane {
    private Pane getInputsLabels(Map<BlockTransactionHashIndex, WalletNode> displayedUtxos) {
        VBox inputsBox = new VBox();
        inputsBox.setMaxWidth(150);
+        inputsBox.setPrefWidth(150);
        inputsBox.setPadding(new Insets(0, 10, 0, 10));
        inputsBox.minHeightProperty().bind(minHeightProperty());
        inputsBox.setAlignment(Pos.CENTER_RIGHT);
@@ -388,14 +391,33 @@ public class TransactionDiagram extends GridPane {
        }

        if(walletTx.getChangeNode() != null) {
+            WalletNode defaultChangeNode = walletTx.getWallet().getFreshNode(KeyPurpose.CHANGE);
+            boolean overGapLimit = (walletTx.getChangeNode().getIndex() - defaultChangeNode.getIndex()) > walletTx.getWallet().getGapLimit();
+
+            HBox actionBox = new HBox();
            String changeDesc = walletTx.getChangeAddress().toString().substring(0, 8) + "...";
-            Label changeLabel = new Label(changeDesc, getChangeGlyph());
+            Label changeLabel = new Label(changeDesc, overGapLimit ? getChangeWarningGlyph() : getChangeGlyph());
            changeLabel.getStyleClass().addAll("output-label", "change-label");
-            Tooltip changeTooltip = new Tooltip("Change of " + getSatsValue(walletTx.getChangeAmount()) + " sats to " + walletTx.getChangeNode().getDerivationPath().replace("m", "..") + "\n" + walletTx.getChangeAddress().toString());
+            Tooltip changeTooltip = new Tooltip("Change of " + getSatsValue(walletTx.getChangeAmount()) + " sats to " + walletTx.getChangeNode().getDerivationPath().replace("m", "..") + "\n" + walletTx.getChangeAddress().toString() + (overGapLimit ? "\nAddress is beyond the gap limit!" : ""));
            changeTooltip.getStyleClass().add("change-label");
            changeTooltip.setShowDelay(new Duration(TOOLTIP_SHOW_DELAY));
            changeLabel.setTooltip(changeTooltip);
-            outputsBox.getChildren().add(changeLabel);
+
+            Button nextChangeAddressButton = new Button("");
+            nextChangeAddressButton.setGraphic(getChangeReplaceGlyph());
+            nextChangeAddressButton.setOnAction(event -> {
+                EventManager.get().post(new ReplaceChangeAddressEvent(walletTx));
+            });
+            Tooltip replaceChangeTooltip = new Tooltip("Use next change address");
+            nextChangeAddressButton.setTooltip(replaceChangeTooltip);
+            Label replaceChangeLabel = new Label("", nextChangeAddressButton);
+            replaceChangeLabel.getStyleClass().add("replace-change-label");
+            replaceChangeLabel.setVisible(false);
+            actionBox.setOnMouseEntered(event -> replaceChangeLabel.setVisible(true));
+            actionBox.setOnMouseExited(event -> replaceChangeLabel.setVisible(false));
+
+            actionBox.getChildren().addAll(changeLabel, replaceChangeLabel);
+            outputsBox.getChildren().add(actionBox);
            outputsBox.getChildren().add(createSpacer());
        }

@@ -484,6 +506,20 @@ public class TransactionDiagram extends GridPane {
        return changeGlyph;
    }

+    public static Glyph getChangeWarningGlyph() {
+        Glyph changeWarningGlyph = new Glyph(FontAwesome5.FONT_NAME, FontAwesome5.Glyph.EXCLAMATION_TRIANGLE);
+        changeWarningGlyph.getStyleClass().add("change-warning-icon");
+        changeWarningGlyph.setFontSize(12);
+        return changeWarningGlyph;
+    }
+
+    public static Glyph getChangeReplaceGlyph() {
+        Glyph changeReplaceGlyph = new Glyph(FontAwesome5.FONT_NAME, FontAwesome5.Glyph.ARROW_DOWN);
+        changeReplaceGlyph.getStyleClass().add("change-replace-icon");
+        changeReplaceGlyph.setFontSize(12);
+        return changeReplaceGlyph;
+    }
+
    private Glyph getFeeGlyph() {
        Glyph feeGlyph = new Glyph(FontAwesome5.FONT_NAME, FontAwesome5.Glyph.HAND_HOLDING);
        feeGlyph.getStyleClass().add("fee-icon");
@@ -45,12 +45,12 @@ public class TransactionIdDialog extends Dialog<Sha256Hash> {

        ValidationSupport validationSupport = new ValidationSupport();
        Platform.runLater(() -> {
+            validationSupport.setValidationDecorator(new StyleClassValidationDecoration());
            validationSupport.registerValidator(txid, Validator.combine(
                    Validator.createEmptyValidator("Transaction id is required"),
                    (Control c, String newValue) -> ValidationResult.fromErrorIf(c, "Transaction ID length incorrect", newValue.length() != 64),
                    (Control c, String newValue) -> ValidationResult.fromErrorIf(c, "Transaction ID must be hexadecimal", !Utils.isHex(newValue))
            ));
-            validationSupport.setValidationDecorator(new StyleClassValidationDecoration());
        });

        final ButtonType okButtonType = new javafx.scene.control.ButtonType("Open Transaction", ButtonBar.ButtonData.OK_DONE);
@@ -44,16 +44,18 @@ public class UtxosChart extends BarChart<String, Number> {

        totalUtxos = utxoDataList.size();
        if(utxoDataList.size() > MAX_BARS) {
-            Long otherTotal = utxoDataList.subList(MAX_BARS - 1, utxoDataList.size()).stream().mapToLong(data -> data.getYValue().longValue()).sum();
+            List<Data<String, Number>> otherDataList = utxoDataList.subList(MAX_BARS - 1, utxoDataList.size());
+            List<Entry> otherEntries = otherDataList.stream().map(data -> (Entry)data.getExtraValue()).collect(Collectors.toList());
+            Long otherTotal = otherDataList.stream().mapToLong(data -> data.getYValue().longValue()).sum();
            utxoDataList = utxoDataList.subList(0, MAX_BARS - 1);
-            utxoDataList.add(new XYChart.Data<>(OTHER_CATEGORY, otherTotal));
+            utxoDataList.add(new XYChart.Data<>(OTHER_CATEGORY, otherTotal, otherEntries));
        }

        for(int i = 0; i < utxoDataList.size(); i++) {
            XYChart.Data<String, Number> newData = utxoDataList.get(i);
            if(i < utxoSeries.getData().size()) {
                XYChart.Data<String, Number> existingData = utxoSeries.getData().get(i);
-                if(!newData.getXValue().equals(existingData.getXValue()) || !newData.getYValue().equals(existingData.getYValue()) || (newData.getExtraValue() != null && !newData.getExtraValue().equals(existingData.getExtraValue()))) {
+                if(!newData.getXValue().equals(existingData.getXValue()) || !newData.getYValue().equals(existingData.getYValue()) || (newData.getExtraValue() instanceof Entry && !newData.getExtraValue().equals(existingData.getExtraValue()))) {
                    utxoSeries.getData().set(i, newData);
                }
            } else {
@@ -87,7 +89,8 @@ public class UtxosChart extends BarChart<String, Number> {
        for(int i = 0; i < utxoSeries.getData().size(); i++) {
            XYChart.Data<String, Number> data = utxoSeries.getData().get(i);

-            if((data.getExtraValue() != null && entries.contains((Entry)data.getExtraValue())) || (data.getExtraValue() == null && entries.size() == totalUtxos)) {
+            if((data.getExtraValue() instanceof Entry && entries.contains((Entry)data.getExtraValue())) ||
+                    (data.getExtraValue() instanceof List && entries.containsAll((List)data.getExtraValue()))) {
                Node bar = lookup(".data" + i);
                if(bar != null) {
                    bar.getStyleClass().add("selected");
@@ -52,10 +52,10 @@ public class WalletBirthDateDialog extends Dialog<Date> {

        ValidationSupport validationSupport = new ValidationSupport();
        Platform.runLater( () -> {
+            validationSupport.setValidationDecorator(new StyleClassValidationDecoration());
            validationSupport.registerValidator(birthDatePicker, Validator.combine(
                    (Control c, LocalDate newValue) -> ValidationResult.fromErrorIf( c, "Birth date not specified", newValue == null)
            ));
-            validationSupport.setValidationDecorator(new StyleClassValidationDecoration());
        });

        final ButtonType okButtonType = new javafx.scene.control.ButtonType("Rescan Wallet", ButtonBar.ButtonData.OK_DONE);
@@ -43,7 +43,7 @@ public class WalletExportDialog extends Dialog<Wallet> {
        if(wallet.getPolicyType() == PolicyType.SINGLE) {
            exporters = List.of(new Electrum(), new SpecterDesktop(), new Sparrow());
        } else if(wallet.getPolicyType() == PolicyType.MULTI) {
-            exporters = List.of(new ColdcardMultisig(), new CoboVaultMultisig(), new Electrum(), new PassportMultisig(), new SpecterDesktop(), new BlueWalletMultisig(), new Sparrow());
+            exporters = List.of(new ColdcardMultisig(), new CoboVaultMultisig(), new Electrum(), new KeystoneMultisig(), new PassportMultisig(), new SpecterDesktop(), new BlueWalletMultisig(), new SpecterDIY(), new Sparrow());
        } else {
            throw new UnsupportedOperationException("Cannot export wallet with policy type " + wallet.getPolicyType());
        }
@@ -47,13 +47,13 @@ public class WalletImportDialog extends Dialog<Wallet> {
        AnchorPane.setRightAnchor(scrollPane, 0.0);

        importAccordion = new Accordion();
-        List<KeystoreFileImport> keystoreImporters = List.of(new ColdcardSinglesig(), new CoboVaultSinglesig(), new PassportSinglesig());
+        List<KeystoreFileImport> keystoreImporters = List.of(new ColdcardSinglesig(), new CoboVaultSinglesig(), new KeystoneSinglesig(), new PassportSinglesig());
        for(KeystoreFileImport importer : keystoreImporters) {
            FileWalletKeystoreImportPane importPane = new FileWalletKeystoreImportPane(importer);
            importAccordion.getPanes().add(importPane);
        }

-        List<WalletImport> walletImporters = List.of(new ColdcardMultisig(), new CoboVaultMultisig(), new Electrum(), new SpecterDesktop(), new BlueWalletMultisig());
+        List<WalletImport> walletImporters = List.of(new ColdcardMultisig(), new CoboVaultMultisig(), new Electrum(), new KeystoneMultisig(), new SpecterDesktop(), new BlueWalletMultisig(), new Sparrow());
        for(WalletImport importer : walletImporters) {
            FileWalletImportPane importPane = new FileWalletImportPane(importer);
            importAccordion.getPanes().add(importPane);
@@ -92,7 +92,7 @@ public class WalletImportDialog extends Dialog<Wallet> {
            List<Device> devices = enumerateService.getValue();
            importAccordion.getPanes().removeIf(titledPane -> titledPane instanceof DevicePane);
            for(Device device : devices) {
-                DevicePane devicePane = new DevicePane(new Wallet(), device);
+                DevicePane devicePane = new DevicePane(new Wallet(), device, devices.size() == 1);
                importAccordion.getPanes().add(0, devicePane);
            }
            Platform.runLater(() -> EventManager.get().post(new UsbDeviceEvent(devices)));
@@ -93,6 +93,7 @@ public class WalletNameDialog extends Dialog<WalletNameDialog.NameAndBirthDate>

        ValidationSupport validationSupport = new ValidationSupport();
        Platform.runLater( () -> {
+            validationSupport.setValidationDecorator(new StyleClassValidationDecoration());
            validationSupport.registerValidator(name, Validator.combine(
                    Validator.createEmptyValidator("Wallet name is required"),
                    (Control c, String newValue) -> ValidationResult.fromErrorIf( c, "Wallet name is not unique", Storage.walletExists(newValue))
@@ -100,7 +101,6 @@ public class WalletNameDialog extends Dialog<WalletNameDialog.NameAndBirthDate>
            validationSupport.registerValidator(existingPicker, Validator.combine(
                    (Control c, LocalDate newValue) -> ValidationResult.fromErrorIf( c, "Birth date not specified", existingCheck.isSelected() && newValue == null)
            ));
-            validationSupport.setValidationDecorator(new StyleClassValidationDecoration());
        });

        final ButtonType okButtonType = new javafx.scene.control.ButtonType("Create Wallet", ButtonBar.ButtonData.OK_DONE);
@@ -77,8 +77,8 @@ public class WalletPasswordDialog extends Dialog<SecureString> {

        ValidationSupport validationSupport = new ValidationSupport();
        Platform.runLater( () -> {
-            validationSupport.registerValidator(passwordConfirm, (Control c, String newValue) -> ValidationResult.fromErrorIf(c, "Password confirmation does not match", !passwordConfirm.getText().equals(password.getText())));
            validationSupport.setValidationDecorator(new StyleClassValidationDecoration());
+            validationSupport.registerValidator(passwordConfirm, (Control c, String newValue) -> ValidationResult.fromErrorIf(c, "Password confirmation does not match", !passwordConfirm.getText().equals(password.getText())));
        });

        okButtonType = new javafx.scene.control.ButtonType(requirement.okButtonText, ButtonBar.ButtonData.OK_DONE);
@@ -135,11 +135,11 @@ public class XprvKeystoreImportPane extends TitledDescriptionPane {
        }

        ValidationSupport validationSupport = new ValidationSupport();
+        validationSupport.setValidationDecorator(new StyleClassValidationDecoration());
        validationSupport.registerValidator(xprvField, Validator.combine(
                Validator.createEmptyValidator("xprv is required"),
                (Control c, String newValue) -> ValidationResult.fromErrorIf( c, "Invalid private key", !ExtendedKey.isValid(newValue) || ExtendedKey.fromDescriptor(newValue).getKey().isPubKeyOnly())
        ));
-        validationSupport.setValidationDecorator(new StyleClassValidationDecoration());

        Button importXprvButton = new Button("Import");
        importXprvButton.setMinWidth(80);
@@ -176,11 +176,11 @@ public class XprvKeystoreImportPane extends TitledDescriptionPane {
        HBox.setHgrow(derivationField, Priority.ALWAYS);

        ValidationSupport validationSupport = new ValidationSupport();
+        validationSupport.setValidationDecorator(new StyleClassValidationDecoration());
        validationSupport.registerValidator(derivationField, Validator.combine(
                Validator.createEmptyValidator("Derivation is required"),
                (Control c, String newValue) -> ValidationResult.fromErrorIf( c, "Invalid derivation", !KeyDerivation.isValid(newValue))
        ));
-        validationSupport.setValidationDecorator(new StyleClassValidationDecoration());

        Button importDerivationButton = new Button("Import Custom Derivation Keystore");
        importDerivationButton.setDisable(true);
@@ -0,0 +1,19 @@
+package com.sparrowwallet.sparrow.event;
+
+import com.sparrowwallet.drongo.wallet.Keystore;
+import com.sparrowwallet.drongo.wallet.Wallet;
+
+import java.util.List;
+
+public class KeystoreEncryptionChangedEvent extends WalletSettingsChangedEvent {
+    private List<Keystore> changedKeystores;
+
+    public KeystoreEncryptionChangedEvent(Wallet wallet, Wallet pastWallet, String walletId, List<Keystore> changedKeystores) {
+        super(wallet, pastWallet, walletId);
+        this.changedKeystores = changedKeystores;
+    }
+
+    public List<Keystore> getChangedKeystores() {
+        return changedKeystores;
+    }
+}
@@ -0,0 +1,22 @@
+package com.sparrowwallet.sparrow.event;
+
+import com.sparrowwallet.drongo.wallet.Keystore;
+import com.sparrowwallet.drongo.wallet.Wallet;
+
+import java.util.List;
+
+/**
+ * This event is trigger when one or more keystores on a wallet are updated, and the wallet is saved
+ */
+public class KeystoreLabelsChangedEvent extends WalletSettingsChangedEvent {
+    private final List<Keystore> changedKeystores;
+
+    public KeystoreLabelsChangedEvent(Wallet wallet, Wallet pastWallet, String walletId, List<Keystore> changedKeystores) {
+        super(wallet, pastWallet, walletId);
+        this.changedKeystores = changedKeystores;
+    }
+
+    public List<Keystore> getChangedKeystores() {
+        return changedKeystores;
+    }
+}
@@ -0,0 +1,13 @@
+package com.sparrowwallet.sparrow.event;
+
+public class LoadingLogChangedEvent {
+    private final boolean visible;
+
+    public LoadingLogChangedEvent(boolean visible) {
+        this.visible = visible;
+    }
+
+    public boolean isVisible() {
+        return visible;
+    }
+}
@@ -1,15 +1,20 @@
 package com.sparrowwallet.sparrow.event;

+import com.sparrowwallet.drongo.wallet.Wallet;
 import com.sparrowwallet.sparrow.wallet.NodeEntry;

 public class ReceiveActionEvent {
-    private final NodeEntry receiveEntry;
+    private final Wallet wallet;

    public ReceiveActionEvent(NodeEntry receiveEntry) {
-        this.receiveEntry = receiveEntry;
+        this.wallet = receiveEntry.getWallet();
    }

-    public NodeEntry getReceiveEntry() {
-        return receiveEntry;
+    public ReceiveActionEvent(Wallet wallet) {
+        this.wallet = wallet;
+    }
+
+    public Wallet getWallet() {
+        return wallet;
    }
 }
@@ -0,0 +1,22 @@
+package com.sparrowwallet.sparrow.event;
+
+import com.sparrowwallet.drongo.wallet.Wallet;
+import com.sparrowwallet.sparrow.net.Aopp;
+
+public class ReceiveProofEvent {
+    private final Wallet wallet;
+    private final Aopp aopp;
+
+    public ReceiveProofEvent(Wallet wallet, Aopp aopp) {
+        this.wallet = wallet;
+        this.aopp = aopp;
+    }
+
+    public Wallet getWallet() {
+        return wallet;
+    }
+
+    public Aopp getAopp() {
+        return aopp;
+    }
+}
@@ -0,0 +1,15 @@
+package com.sparrowwallet.sparrow.event;
+
+import com.sparrowwallet.drongo.wallet.WalletTransaction;
+
+public class ReplaceChangeAddressEvent {
+    private final WalletTransaction walletTransaction;
+
+    public ReplaceChangeAddressEvent(WalletTransaction walletTx) {
+        this.walletTransaction = walletTx;
+    }
+
+    public WalletTransaction getWalletTransaction() {
+        return walletTransaction;
+    }
+}
@@ -2,17 +2,30 @@ package com.sparrowwallet.sparrow.event;

 import javafx.stage.Window;

+import java.io.File;
+
 /**
 * Event class used to request the transaction open file dialog
 */
 public class RequestTransactionOpenEvent {
    private final Window window;
+    private final File file;

    public RequestTransactionOpenEvent(Window window) {
        this.window = window;
+        this.file = null;
+    }
+
+    public RequestTransactionOpenEvent(Window window, File file) {
+        this.window = window;
+        this.file = file;
    }

    public Window getWindow() {
        return window;
    }
+
+    public File getFile() {
+        return file;
+    }
 }
@@ -2,17 +2,30 @@ package com.sparrowwallet.sparrow.event;

 import javafx.stage.Window;

+import java.io.File;
+
 /**
 * Event class used to request the wallet open dialog
 */
 public class RequestWalletOpenEvent {
    private final Window window;
+    private final File file;

    public RequestWalletOpenEvent(Window window) {
        this.window = window;
+        this.file = null;
+    }
+
+    public RequestWalletOpenEvent(Window window, File file) {
+        this.window = window;
+        this.file = file;
    }

    public Window getWindow() {
        return window;
    }
+
+    public File getFile() {
+        return file;
+    }
 }
@@ -0,0 +1,24 @@
+package com.sparrowwallet.sparrow.event;
+
+import com.sparrowwallet.drongo.wallet.Payment;
+import com.sparrowwallet.drongo.wallet.Wallet;
+
+import java.util.List;
+
+public class SendPaymentsEvent {
+    private final Wallet wallet;
+    private final List<Payment> payments;
+
+    public SendPaymentsEvent(Wallet wallet, List<Payment> payments) {
+        this.wallet = wallet;
+        this.payments = payments;
+    }
+
+    public Wallet getWallet() {
+        return wallet;
+    }
+
+    public List<Payment> getPayments() {
+        return payments;
+    }
+}
@@ -8,9 +8,9 @@ import java.util.Map;

 public class StorageEvent extends TimedEvent {
    private static boolean firstRunDone = false;
-    private static final Map<File, Long> eventTime = new HashMap<>();
+    private static final Map<String, Long> eventTime = new HashMap<>();

-    public StorageEvent(File file, Action action, String status) {
+    public StorageEvent(String walletId, Action action, String status) {
        super(action, status);

        Integer keyDerivationPeriod = Config.get().getKeyDerivationPeriod();
@@ -19,10 +19,10 @@ public class StorageEvent extends TimedEvent {
        }

        if(action == Action.START) {
-            eventTime.put(file, System.currentTimeMillis());
+            eventTime.put(walletId, System.currentTimeMillis());
            timeMills = keyDerivationPeriod;
        } else if(action == Action.END) {
-            long start = eventTime.get(file);
+            long start = eventTime.get(walletId);
            if(firstRunDone) {
                keyDerivationPeriod = (int)(System.currentTimeMillis() - start);
                Config.get().setKeyDerivationPeriod(keyDerivationPeriod);
@@ -0,0 +1,13 @@
+package com.sparrowwallet.sparrow.event;
+
+public class UtxosChartChangedEvent {
+    private final boolean visible;
+
+    public UtxosChartChangedEvent(boolean visible) {
+        this.visible = visible;
+    }
+
+    public boolean isVisible() {
+        return visible;
+    }
+}
@@ -11,8 +11,8 @@ import java.io.File;
 * This is because any failure in saving the wallet must be immediately reported to the user.
 * Note that all wallet detail controllers that share a WalletForm, and that class posts WalletNodesChangedEvent once it has cleared it's entry caches.
 */
-public class WalletAddressesChangedEvent extends WalletSettingsChangedEvent {
-    public WalletAddressesChangedEvent(Wallet wallet, Wallet pastWallet, File walletFile) {
-        super(wallet, pastWallet, walletFile);
+public class WalletAddressesChangedEvent extends WalletHistoryClearedEvent {
+    public WalletAddressesChangedEvent(Wallet wallet, Wallet pastWallet, String walletId) {
+        super(wallet, pastWallet, walletId);
    }
 }
@@ -1,21 +0,0 @@
-package com.sparrowwallet.sparrow.event;
-
-import com.sparrowwallet.drongo.wallet.Wallet;
-import com.sparrowwallet.sparrow.wallet.Entry;
-
-/**
- * This event is fired when a wallet entry (transaction, txi or txo) label is changed.
- * Extends WalletDataChangedEvent so triggers a background save.
- */
-public class WalletEntryLabelChangedEvent extends WalletDataChangedEvent {
-    private final Entry entry;
-
-    public WalletEntryLabelChangedEvent(Wallet wallet, Entry entry) {
-        super(wallet);
-        this.entry = entry;
-    }
-
-    public Entry getEntry() {
-        return entry;
-    }
-}
@@ -0,0 +1,27 @@
+package com.sparrowwallet.sparrow.event;
+
+import com.sparrowwallet.drongo.wallet.Wallet;
+import com.sparrowwallet.sparrow.wallet.Entry;
+
+import java.util.List;
+
+/**
+ * This event is fired when a wallet entry (transaction, txi or txo) label is changed.
+ */
+public class WalletEntryLabelsChangedEvent extends WalletChangedEvent {
+    private final List<Entry> entries;
+
+    public WalletEntryLabelsChangedEvent(Wallet wallet, Entry entry) {
+        super(wallet);
+        this.entries = List.of(entry);
+    }
+
+    public WalletEntryLabelsChangedEvent(Wallet wallet, List<Entry> entries) {
+        super(wallet);
+        this.entries = entries;
+    }
+
+    public List<Entry> getEntries() {
+        return entries;
+    }
+}
@@ -23,8 +23,8 @@ public class WalletHistoryChangedEvent extends WalletChangedEvent {
        this.historyChangedNodes = historyChangedNodes;
    }

-    public File getWalletFile() {
-        return storage.getWalletFile();
+    public String getWalletId() {
+        return storage.getWalletId(getWallet());
    }

    public List<WalletNode> getHistoryChangedNodes() {
@@ -0,0 +1,9 @@
+package com.sparrowwallet.sparrow.event;
+
+import com.sparrowwallet.drongo.wallet.Wallet;
+
+public class WalletHistoryClearedEvent extends WalletSettingsChangedEvent {
+    public WalletHistoryClearedEvent(Wallet wallet, Wallet pastWallet, String walletId) {
+        super(wallet, pastWallet, walletId);
+    }
+}
@@ -6,7 +6,7 @@ public class WalletHistoryFailedEvent extends WalletHistoryStatusEvent {
    private final Throwable exception;

    public WalletHistoryFailedEvent(Wallet wallet, Throwable exception) {
-        super(wallet, exception.getCause() == null ? exception.getMessage() : exception.getCause().getMessage());
+        super(wallet, exception.getMessage());
        this.exception = exception;
    }

@@ -0,0 +1,9 @@
+package com.sparrowwallet.sparrow.event;
+
+import com.sparrowwallet.drongo.wallet.Wallet;
+
+public class WalletPasswordChangedEvent extends WalletSettingsChangedEvent {
+    public WalletPasswordChangedEvent(Wallet wallet, Wallet pastWallet, String walletId) {
+        super(wallet, pastWallet, walletId);
+    }
+}
@@ -5,25 +5,24 @@ import com.sparrowwallet.drongo.wallet.Wallet;
 import java.io.File;

 /**
- * This event is posted when a wallet's settings are changed in a way that does not update the wallet addresses or history.
- * For example, changing the keystore source or label will trigger this event, which updates the wallet but avoids a full wallet refresh.
- * It is impossible for the validity of a wallet to change on this event - listen for WalletAddressesChangedEvent for this
+ * This is the base class for events posted when a wallet's settings are changed
+ * Do not listen for this event directly - listen for a subclass, for example KeystoreLabelsChangedEvent or WalletAddressesChangedEvent
 */
 public class WalletSettingsChangedEvent extends WalletChangedEvent {
    private final Wallet pastWallet;
-    private final File walletFile;
+    private final String walletId;

-    public WalletSettingsChangedEvent(Wallet wallet, Wallet pastWallet, File walletFile) {
+    public WalletSettingsChangedEvent(Wallet wallet, Wallet pastWallet, String walletId) {
        super(wallet);
        this.pastWallet = pastWallet;
-        this.walletFile = walletFile;
+        this.walletId = walletId;
    }

    public Wallet getPastWallet() {
        return pastWallet;
    }

-    public File getWalletFile() {
-        return walletFile;
+    public String getWalletId() {
+        return walletId;
    }
 }
@@ -3,7 +3,7 @@ package com.sparrowwallet.sparrow.event;
 import com.sparrowwallet.drongo.wallet.BlockTransactionHashIndex;
 import com.sparrowwallet.drongo.wallet.Wallet;

-public class WalletUtxoStatusChangedEvent extends WalletDataChangedEvent {
+public class WalletUtxoStatusChangedEvent extends WalletChangedEvent {
    private final BlockTransactionHashIndex utxo;

    public WalletUtxoStatusChangedEvent(Wallet wallet, BlockTransactionHashIndex utxo) {
@@ -24,6 +24,7 @@ public class FontAwesome5 extends GlyphFont {
        CHECK_CIRCLE('\uf058'),
        CIRCLE('\uf111'),
        COINS('\uf51e'),
+        COPY('\uf0c5'),
        EXCHANGE_ALT('\uf362'),
        EXCLAMATION_CIRCLE('\uf06a'),
        EXCLAMATION_TRIANGLE('\uf071'),
@@ -50,6 +51,8 @@ public class FontAwesome5 extends GlyphFont {
        SEARCH('\uf002'),
        SIGN_OUT_ALT('\uf2f5'),
        SQUARE('\uf0c8'),
+        SNOWFLAKE('\uf2dc'),
+        SUN('\uf185'),
        TIMES_CIRCLE('\uf057'),
        TOGGLE_OFF('\uf204'),
        TOGGLE_ON('\uf205'),
@@ -0,0 +1,535 @@
+/**
+ * Copyright 2019 Pratanu Mandal
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * 
+ */
+
+package com.sparrowwallet.sparrow.instance;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.BufferedReader;
+import java.io.BufferedWriter;
+import java.io.DataInputStream;
+import java.io.DataOutputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.OutputStream;
+import java.io.OutputStreamWriter;
+import java.io.RandomAccessFile;
+import java.net.InetAddress;
+import java.net.ServerSocket;
+import java.net.Socket;
+import java.net.SocketException;
+import java.net.UnknownHostException;
+import java.nio.channels.FileChannel;
+import java.nio.channels.FileLock;
+
+/**
+ * The <code>Instance</code> class is the primary logical entry point to the library.<br>
+ * It allows to create an application lock or free it and send and receive messages between first and subsequent instances.<br><br>
+ * 
+ * <pre>
+ *	// unique application ID
+ *	String APP_ID = "tk.pratanumandal.unique4j-mlsdvo-20191511-#j.6";
+ *	
+ *	// create Instance instance
+ *	Instance unique = new Instance(APP_ID) {
+ *	&nbsp;&nbsp;&nbsp;&nbsp;&#64;Override
+ *	&nbsp;&nbsp;&nbsp;&nbsp;protected void receiveMessage(String message) {
+ *	&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;// print received message (timestamp)
+ *	&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;System.out.println(message);
+ *	&nbsp;&nbsp;&nbsp;&nbsp;}
+ *	&nbsp;&nbsp;&nbsp;&nbsp;
+ *	&nbsp;&nbsp;&nbsp;&nbsp;&#64;Override
+ *	&nbsp;&nbsp;&nbsp;&nbsp;protected String sendMessage() {
+ *	&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;// send timestamp as message
+ *	&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Timestamp ts = new Timestamp(new Date().getTime());
+ *	&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return "Another instance launch attempted: " + ts.toString();
+ *	&nbsp;&nbsp;&nbsp;&nbsp;}
+ *	};
+ *	
+ *	// try to obtain lock
+ *	try {
+ *	&nbsp;&nbsp;&nbsp;&nbsp;unique.acquireLock();
+ *	} catch (InstanceException e) {
+ *	&nbsp;&nbsp;&nbsp;&nbsp;e.printStackTrace();
+ *	}
+ *	
+ *	...
+ *	
+ *	// try to free the lock before exiting program
+ *	try {
+ *	&nbsp;&nbsp;&nbsp;&nbsp;unique.freeLock();
+ *	} catch (InstanceException e) {
+ *	&nbsp;&nbsp;&nbsp;&nbsp;e.printStackTrace();
+ *	}
+ * </pre>
+ * 
+ * @author Pratanu Mandal
+ * @since 1.3
+ *
+ */
+public abstract class Instance {
+    private static final Logger log = LoggerFactory.getLogger(Instance.class);
+	
+	// starting position of port check
+	private static final int PORT_START = 7221;
+	
+	// system temporary directory path
+	private static final String TEMP_DIR = System.getProperty("java.io.tmpdir");
+	
+	/**
+	 * Unique string representing the application ID.<br><br>
+	 * 
+	 * The APP_ID must be as unique as possible.
+	 * Avoid generic names like "my_app_id" or "hello_world".<br>
+	 * A good strategy is to use the entire package name (group ID + artifact ID) along with some random characters.
+	 */
+	public final String APP_ID;
+	
+	// auto exit from application or not
+	private final boolean AUTO_EXIT;
+	
+	// lock server port
+	private int port;
+	
+	// lock server socket
+	private ServerSocket server;
+	
+	// lock file RAF object
+	private RandomAccessFile lockRAF;
+	
+	// file lock for the lock file RAF object
+	private FileLock fileLock;
+
+	/**
+	 * Parameterized constructor.<br>
+	 * This constructor configures to automatically exit the application for subsequent instances.<br><br>
+	 * 
+	 * The APP_ID must be as unique as possible.
+	 * Avoid generic names like "my_app_id" or "hello_world".<br>
+	 * A good strategy is to use the entire package name (group ID + artifact ID) along with some random characters.
+	 * 
+	 * @param APP_ID Unique string representing the application ID
+	 */
+	public Instance(final String APP_ID) {
+		this(APP_ID, true);
+	}
+	
+	/**
+	 * Parameterized constructor.<br>
+	 * This constructor allows to explicitly specify the exit strategy for subsequent instances.<br><br>
+	 * 
+	 * The APP_ID must be as unique as possible.
+	 * Avoid generic names like "my_app_id" or "hello_world".<br>
+	 * A good strategy is to use the entire package name (group ID + artifact ID) along with some random characters.
+	 * 
+	 * @since 1.2
+	 * 
+	 * @param APP_ID Unique string representing the application ID
+	 * @param AUTO_EXIT If true, automatically exit the application for subsequent instances
+	 */
+	public Instance(final String APP_ID, final boolean AUTO_EXIT) {
+		this.APP_ID = APP_ID;
+		this.AUTO_EXIT = AUTO_EXIT;
+	}
+	
+	/**
+	 * Try to obtain lock. If not possible, send data to first instance.
+	 * 
+	 * @deprecated Use <code>acquireLock()</code> instead.
+	 * @throws InstanceException throws InstanceException if it is unable to start a server or connect to server
+	 */
+	@Deprecated
+	public void lock() throws InstanceException {
+		acquireLock();
+	}
+	
+	/**
+	 * Try to obtain lock. If not possible, send data to first instance.
+	 * 
+	 * @since 1.2
+	 * 
+	 * @return true if able to acquire lock, false otherwise
+	 * @throws InstanceException throws InstanceException if it is unable to start a server or connect to server
+	 */
+	public boolean acquireLock() throws InstanceException {
+		// try to obtain port number from lock file
+		port = lockFile();
+		
+		if (port == -1) {
+			// failed to fetch port number
+			// try to start server
+			startServer();
+		}
+		else {
+			// port number fetched from lock file
+			// try to start client
+			doClient();
+		}
+		
+		return (server != null);
+	}
+	
+	// start the server
+	private void startServer() throws InstanceException {
+		// try to create server
+		port = PORT_START;
+		while (true) {
+			try {
+				server = new ServerSocket(port, 50, InetAddress.getByName(null));
+				break;
+			} catch (IOException e) {
+				port++;
+			}
+		}
+		
+		// try to lock file
+		lockFile(port);
+		
+		// server created successfully; this is the first instance
+		// keep listening for data from other instances
+		Thread thread = new Thread() {
+			@Override
+			public void run() {
+				while (!server.isClosed()) {
+					try {
+						// establish connection
+						final Socket socket = server.accept();
+						
+						// handle socket on a different thread to allow parallel connections
+						Thread thread = new Thread() {
+							@Override
+							public void run() {
+								try {
+									// open writer
+									OutputStream os = socket.getOutputStream();
+									DataOutputStream dos = new DataOutputStream(os);
+									
+									// open reader
+									InputStream is = socket.getInputStream();
+									DataInputStream dis = new DataInputStream(is);
+									
+									// read message length from client
+									int length = dis.readInt();
+									
+									// read message string from client
+									String message = null;
+									if (length > -1) {
+										byte[] messageBytes = new byte[length];
+										int bytesRead = dis.read(messageBytes, 0, length);
+										message = new String(messageBytes, 0, bytesRead, "UTF-8");
+									}
+									
+									// write response to client
+									if (APP_ID == null) {
+										dos.writeInt(-1);
+									}
+									else {
+										byte[] appId = APP_ID.getBytes("UTF-8");
+										
+										dos.writeInt(appId.length);
+										dos.write(appId);
+									}
+									dos.flush();
+									
+									// close writer and reader
+									dos.close();
+									dis.close();
+									
+									// perform user action on message
+									receiveMessage(message);
+									
+									// close socket
+									socket.close();
+								} catch (IOException e) {
+									handleException(new InstanceException(e));
+								}
+							}
+						};
+						
+						// start socket thread
+						thread.start();
+					} catch (SocketException e) {
+						if (!server.isClosed()) {
+							handleException(new InstanceException(e));
+						}
+					} catch (IOException e) {
+						handleException(new InstanceException(e));
+					}
+				}
+			}
+		};
+		
+		thread.start();
+	}
+	
+	// do client tasks
+	private void doClient() throws InstanceException {
+		// get localhost address
+		InetAddress address = null;
+		try {
+			address = InetAddress.getByName(null);
+		} catch (UnknownHostException e) {
+			throw new InstanceException(e);
+		}
+		
+		// try to establish connection to server
+		Socket socket = null;
+		try {
+			socket = new Socket(address, port);
+		} catch (IOException e) {
+			// connection failed try to start server
+			startServer();
+		}
+		
+		// connection successful try to connect to server
+		if (socket != null) {
+			try {
+				// get message to be sent to first instance
+				String message = sendMessage();
+				
+				// open writer
+				OutputStream os = socket.getOutputStream();
+				DataOutputStream dos = new DataOutputStream(os);
+				
+				// open reader
+				InputStream is = socket.getInputStream();
+				DataInputStream dis = new DataInputStream(is);
+				
+				// write message to server
+				if (message == null) {
+					dos.writeInt(-1);
+				}
+				else {
+					byte[] messageBytes = message.getBytes("UTF-8");
+					
+					dos.writeInt(messageBytes.length);
+					dos.write(messageBytes);
+				}
+				
+				dos.flush();
+				
+				// read response length from server
+				int length = dis.readInt();
+				
+				// read response string from server
+				String response = null;
+				if (length > -1) {
+					byte[] responseBytes = new byte[length];
+					int bytesRead = dis.read(responseBytes, 0, length);
+					response = new String(responseBytes, 0, bytesRead, "UTF-8");
+				}
+				
+				// close writer and reader
+				dos.close();
+				dis.close();
+				
+				if (response.equals(APP_ID)) {
+					// validation successful
+					if (AUTO_EXIT) {
+						// perform pre-exit tasks
+						beforeExit();
+						// exit this instance
+						System.exit(0);
+					}
+				}
+				else {
+					// validation failed, this is the first instance
+					startServer();
+				}
+			} catch (IOException e) {
+				throw new InstanceException(e);
+			} finally {
+				// close socket
+			 	try {
+			 		if (socket != null) socket.close();
+				} catch (IOException e) {
+					throw new InstanceException(e);
+				}
+			}
+		}
+	}
+	
+	// try to get port from lock file
+	private int lockFile() throws InstanceException {
+		// lock file path
+		String filePath = TEMP_DIR + File.separator + APP_ID + ".lock";
+		File file = new File(filePath);
+		
+		// try to get port from lock file
+		if (file.exists()) {
+			BufferedReader br = null;
+			try {
+				br = new BufferedReader(new InputStreamReader(new FileInputStream(file)));
+				return Integer.parseInt(br.readLine());
+			} catch (IOException e) {
+				throw new InstanceException(e);
+			} catch (NumberFormatException e) {
+				// do nothing
+			} finally {
+				try {
+					if (br != null) br.close();
+				} catch (IOException e) {
+					throw new InstanceException(e);
+				}
+			}
+		}
+		
+		return -1;
+	}
+	
+	// try to write port to lock file
+	private void lockFile(int port) throws InstanceException {
+		// lock file path
+		String filePath = TEMP_DIR + File.separator + APP_ID + ".lock";
+		File file = new File(filePath);
+		
+		// try to write port to lock file
+		BufferedWriter bw = null;
+		try {
+			bw = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(file)));
+			bw.write(String.valueOf(port));
+		} catch (IOException e) {
+			throw new InstanceException(e);
+		} finally {
+			try {
+				if (bw != null) bw.close();
+			} catch (IOException e) {
+				throw new InstanceException(e);
+			}
+		}
+		
+		// try to obtain file lock
+		try {
+			lockRAF = new RandomAccessFile(file, "rw");
+			FileChannel fc = lockRAF.getChannel();
+			fileLock = fc.tryLock(0, Long.MAX_VALUE, true);
+			if (fileLock == null) {
+				throw new InstanceException("Failed to obtain file lock");
+			}
+		} catch (FileNotFoundException e) {
+			throw new InstanceException(e);
+		} catch (IOException e) {
+			throw new InstanceException(e);
+		}
+	}
+	
+	/**
+	 * Free the lock if possible. This is only required to be called from the first instance.
+	 * 
+	 * @deprecated Use <code>freeLock()</code> instead.
+	 * @throws InstanceException throws InstanceException if it is unable to stop the server or release file lock
+	 */
+	@Deprecated
+	public void free() throws InstanceException {
+		freeLock();
+	}
+	
+	/**
+	 * Free the lock if possible. This is only required to be called from the first instance.
+	 * 
+	 * @since 1.2
+	 * 
+	 * @return true if able to release lock, false otherwise
+	 * @throws InstanceException throws InstanceException if it is unable to stop the server or release file lock
+	 */
+	public boolean freeLock() throws InstanceException {
+		try {
+			// close server socket
+			if (server != null) {
+				server.close();
+			
+				// lock file path
+				String filePath = TEMP_DIR + File.separator + APP_ID + ".lock";
+				File file = new File(filePath);
+				
+				// try to release file lock
+				if (fileLock != null) {
+					fileLock.release();
+				}
+				
+				// try to close lock file RAF object
+				if (lockRAF != null) {
+					lockRAF.close();
+				}
+				
+				// try to delete lock file
+				if (file.exists()) {
+					file.delete();
+				}
+				
+				return true;
+			}
+			
+			return false;
+		} catch (IOException e) {
+			throw new InstanceException(e);
+		}
+	}
+	
+	/**
+	 * Method used in first instance to receive messages from subsequent instances.<br><br>
+	 * 
+	 * This method is not synchronized.
+	 * 
+	 * @param message message received by first instance from subsequent instances
+	 */
+	protected abstract void receiveMessage(String message);
+	
+	/**
+	 * Method used in subsequent instances to send message to first instance.<br><br>
+	 * 
+	 * It is not recommended to perform blocking (long running) tasks here. Use <code>beforeExit()</code> method instead.<br>
+	 * One exception to this rule is if you intend to perform some user interaction before sending the message.<br><br>
+	 * 
+	 * This method is not synchronized.
+	 * 
+	 * @return message sent from subsequent instances
+	 */
+	protected abstract String sendMessage();
+	
+	/**
+	 * Method to receive and handle exceptions occurring while first instance is listening for subsequent instances.<br><br>
+	 * 
+	 * By default prints stack trace of all exceptions. Override this method to handle exceptions explicitly.<br><br>
+	 * 
+	 * This method is not synchronized.
+	 * 
+	 * @param exception exception occurring while first instance is listening for subsequent instances
+	 */
+	protected void handleException(Exception exception) {
+        log.error("Error listening for instances", exception);
+	}
+	
+	/**
+	 * This method is called before exiting from subsequent instances.<br><br>
+	 * 
+	 * Override this method to perform blocking tasks before exiting from subsequent instances.<br>
+	 * This method is not invoked if auto exit is turned off.<br><br>
+	 * 
+	 * This method is not synchronized.
+	 * 
+	 * @since 1.2
+	 */
+	protected void beforeExit() {}
+	
+}
@@ -0,0 +1,69 @@
+/**
+ * Copyright 2019 Pratanu Mandal
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * 
+ */
+
+package com.sparrowwallet.sparrow.instance;
+
+/**
+ * The <code>InstanceException</code> class is a wrapper for all exceptions thrown from Instance.
+ * 
+ * @author Pratanu Mandal
+ * @since 1.1
+ *
+ */
+public class InstanceException extends Exception {
+	
+	private static final long serialVersionUID = 268060627071973613L;
+
+	/**
+	 * Constructs a new exception with null as its detail message.
+	 */
+	public InstanceException() {
+		super();
+	}
+	
+	/**
+	 * Constructs a new exception with the specified detail message.<br>
+	 * The cause is not initialized, and may subsequently be initialized by a call to {@link #initCause}.
+	 * 
+	 * @param message the detail message. The detail message is saved for later retrieval by the {@link #getMessage()} method.
+	 */
+	public InstanceException(String message) {
+		super(message);
+	}
+	
+	/**
+	 * Constructs a new exception with the specified detail message and cause.<br><br>
+	 * Note that the detail message associated with cause is not automatically incorporated in this exception's detail message.
+	 * 
+	 * @param message the detail message (which is saved for later retrieval by the {@link #getMessage()} method).
+	 * @param cause the cause (which is saved for later retrieval by the {@link #getCause()} method). (A null value is permitted, and indicates that the cause is nonexistent or unknown.)
+	 */
+	public InstanceException(String message, Throwable cause) {
+		super(message, cause);
+	}
+
+	/**
+	 * Constructs a new exception with the specified cause and a detail message of (cause==null ? null : cause.toString()) (which typically contains the class and detail message of cause).<br>
+	 * This constructor is useful for exceptions that are little more than wrappers for other throwables (for example, {@link java.security.PrivilegedActionException}).
+	 * 
+	 * @param cause the cause (which is saved for later retrieval by the {@link #getCause()} method). (A null value is permitted, and indicates that the cause is nonexistent or unknown.)
+	 */
+	public InstanceException(Throwable cause) {
+		super(cause);
+	}
+
+}
@@ -0,0 +1,172 @@
+package com.sparrowwallet.sparrow.instance;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import com.google.gson.JsonArray;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonParser;
+
+/**
+ * The <code>InstanceList</code> class is a logical entry point to the library which extends the functionality of the <code>Instance</code> class.<br>
+ * It allows to create an application lock or free it and send and receive messages between first and subsequent instances.<br><br>
+ * 
+ * This class is intended for passing a list of strings instead of a single string from the subsequent instance to the first instance.<br><br>
+ * 
+ * <pre>
+ *	// unique application ID
+ *	String APP_ID = "tk.pratanumandal.unique4j-mlsdvo-20191511-#j.6";
+ *	
+ *	// create Instance instance
+ *	Instance unique = new InstanceList(APP_ID) {
+ *	&nbsp;&nbsp;&nbsp;&nbsp;&#64;Override
+ *	&nbsp;&nbsp;&nbsp;&nbsp;protected List&lt;String&gt; sendMessageList() {
+ *	&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;List&lt;String&gt; messageList = new ArrayList&lt;String&gt;();
+ *	&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
+ *	&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;messageList.add("Message 1");
+ *	&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;messageList.add("Message 2");
+ *	&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;messageList.add("Message 3");
+ *	&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;messageList.add("Message 4");
+ *	&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
+ *	&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return messageList;
+ *	&nbsp;&nbsp;&nbsp;&nbsp;}
+ *
+ *	&nbsp;&nbsp;&nbsp;&nbsp;&#64;Override
+ *	&nbsp;&nbsp;&nbsp;&nbsp;protected void receiveMessageList(List&lt;String&gt; messageList) {
+ *	&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;for (String message : messageList) {
+ *	&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;System.out.println(message);
+ *	&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}
+ *	&nbsp;&nbsp;&nbsp;&nbsp;}
+ *	};
+ *	
+ *	// try to obtain lock
+ *	try {
+ *	&nbsp;&nbsp;&nbsp;&nbsp;unique.acquireLock();
+ *	} catch (InstanceException e) {
+ *	&nbsp;&nbsp;&nbsp;&nbsp;e.printStackTrace();
+ *	}
+ *	
+ *	...
+ *	
+ *	// try to free the lock before exiting program
+ *	try {
+ *	&nbsp;&nbsp;&nbsp;&nbsp;unique.freeLock();
+ *	} catch (InstanceException e) {
+ *	&nbsp;&nbsp;&nbsp;&nbsp;e.printStackTrace();
+ *	}
+ * </pre>
+ * 
+ * @author Pratanu Mandal
+ * @since 1.3
+ *
+ */
+public abstract class InstanceList extends Instance {
+	
+	/**
+	 * Parameterized constructor.<br>
+	 * This constructor configures to automatically exit the application for subsequent instances.<br><br>
+	 * 
+	 * The APP_ID must be as unique as possible.
+	 * Avoid generic names like "my_app_id" or "hello_world".<br>
+	 * A good strategy is to use the entire package name (group ID + artifact ID) along with some random characters.
+	 * 
+	 * @param APP_ID Unique string representing the application ID
+	 */
+	public InstanceList(String APP_ID) {
+		super(APP_ID);
+	}
+	
+	/**
+	 * Parameterized constructor.<br>
+	 * This constructor allows to explicitly specify the exit strategy for subsequent instances.<br><br>
+	 * 
+	 * The APP_ID must be as unique as possible.
+	 * Avoid generic names like "my_app_id" or "hello_world".<br>
+	 * A good strategy is to use the entire package name (group ID + artifact ID) along with some random characters.
+	 * 
+	 * @param APP_ID Unique string representing the application ID
+	 * @param AUTO_EXIT If true, automatically exit the application for subsequent instances
+	 */
+	public InstanceList(String APP_ID, boolean AUTO_EXIT) {
+		super(APP_ID, AUTO_EXIT);
+	}
+
+	/**
+	 * Internal method used in first instance to receive and parse messages from subsequent instances.<br>
+	 * The use of this method directly in <code>InstanceList</code> is discouraged. Use <code>receiveMessageList()</code> instead.<br><br>
+	 * 
+	 * This method is not synchronized.
+	 * 
+	 * @param message message received by first instance from subsequent instances
+	 */
+	@Override
+	protected final void receiveMessage(String message) {
+		if (message == null) {
+			receiveMessageList(null);
+		}
+		else {
+			// parse the JSON array string into an array of string arguments
+	        JsonArray jsonArgs = JsonParser.parseString(message).getAsJsonArray();
+	        
+	        List<String> stringArgs = new ArrayList<String>(jsonArgs.size());
+	        
+	        for (int i = 0; i < jsonArgs.size(); i++) {
+	            JsonElement element = jsonArgs.get(i);
+	            stringArgs.add(element.getAsString());
+	        }
+	        
+	        // return the parsed string list
+	        receiveMessageList(stringArgs);
+		}
+	}
+
+	/**
+	 * Internal method used in subsequent instances to parse and send message to first instance.<br>
+	 * The use of this method directly in <code>InstanceList</code> is discouraged. Use <code>sendMessageList()</code> instead.<br><br>
+	 * 
+	 * It is not recommended to perform blocking (long running) tasks here. Use <code>beforeExit()</code> method instead.<br>
+	 * One exception to this rule is if you intend to perform some user interaction before sending the message.<br><br>
+	 * 
+	 * This method is not synchronized.
+	 * 
+	 * @return message sent from subsequent instances
+	 */
+	@Override
+	protected final String sendMessage() {
+		// convert arguments to JSON array string
+        JsonArray jsonArgs = new JsonArray();
+        
+        List<String> stringArgs = sendMessageList();
+        
+        if (stringArgs == null) return null;
+        
+        for (String arg : stringArgs) {
+            jsonArgs.add(arg);
+        }
+
+        // return the JSON array string
+        return jsonArgs.toString();
+	}
+	
+	/**
+	 * Method used in first instance to receive list of messages from subsequent instances.<br><br>
+	 * 
+	 * This method is not synchronized.
+	 * 
+	 * @param messageList list of messages received by first instance from subsequent instances
+	 */
+	protected abstract void receiveMessageList(List<String> messageList);
+	
+	/**
+	 * Method used in subsequent instances to send list of messages to first instance.<br><br>
+	 * 
+	 * It is not recommended to perform blocking (long running) tasks here. Use <code>beforeExit()</code> method instead.<br>
+	 * One exception to this rule is if you intend to perform some user interaction before sending the message.<br><br>
+	 * 
+	 * This method is not synchronized.
+	 * 
+	 * @return list of messages sent from subsequent instances
+	 */
+	protected abstract List<String> sendMessageList();
+	
+}
@@ -36,7 +36,7 @@ public class ColdcardMultisig implements WalletImport, KeystoreFileImport, Walle
    @Override
    public Keystore getKeystore(ScriptType scriptType, InputStream inputStream, String password) throws ImportException {
        InputStreamReader reader = new InputStreamReader(inputStream, StandardCharsets.UTF_8);
-        ColdcardKeystore cck = Storage.getGson().fromJson(reader, ColdcardKeystore.class);
+        ColdcardKeystore cck = JsonPersistence.getGson().fromJson(reader, ColdcardKeystore.class);

        Keystore keystore = new Keystore("Coldcard");
        keystore.setSource(KeystoreSource.HW_AIRGAPPED);
@@ -145,7 +145,7 @@ public class ColdcardMultisig implements WalletImport, KeystoreFileImport, Walle
            wallet.setScriptType(scriptType);

            if(!wallet.isValid()) {
-                throw new IllegalStateException("This file does not describe a valid wallet. Please use the Settings > Multisig Wallets > Export XPUB feature on your Coldcard.");
+                throw new IllegalStateException("This file does not describe a valid wallet. " + getKeystoreImportDescription());
            }

            return wallet;
@@ -180,7 +180,7 @@ public class ColdcardMultisig implements WalletImport, KeystoreFileImport, Walle
        }

        try {
-            BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(outputStream));
+            BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(outputStream, StandardCharsets.UTF_8));
            writer.append("# " + getName() + " setup file (created by Sparrow)\n");
            writer.append("#\n");
            writer.append("Name: ").append(wallet.getName()).append("\n");
@@ -202,7 +202,6 @@ public class ColdcardMultisig implements WalletImport, KeystoreFileImport, Walle
            }

            writer.flush();
-            writer.close();
        } catch(Exception e) {
            log.error("Error exporting Coldcard multisig wallet", e);
            throw new ExportException("Error exporting Coldcard multisig wallet", e);
@@ -11,6 +11,8 @@ import org.slf4j.LoggerFactory;

 import java.io.*;
 import java.lang.reflect.Type;
+import java.nio.file.Files;
+import java.nio.file.attribute.PosixFilePermissions;
 import java.util.Arrays;
 import java.util.Currency;
 import java.util.List;
@@ -38,6 +40,8 @@ public class Config {
    private boolean openWalletsInNewWindows = false;
    private boolean hideEmptyUsedAddresses = false;
    private boolean showTransactionHex = true;
+    private boolean showLoadingLog = false;
+    private boolean showUtxosChart = true;
    private List<File> recentWalletFiles;
    private Integer keyDerivationPeriod;
    private File hwi;
@@ -66,10 +70,6 @@ public class Config {

    private static File getConfigFile() {
        File sparrowDir = Storage.getSparrowDir();
-        if(!sparrowDir.exists()) {
-            sparrowDir.mkdirs();
-        }
-
        return new File(sparrowDir, CONFIG_FILENAME);
    }

@@ -249,6 +249,24 @@ public class Config {
        flush();
    }

+    public boolean isShowLoadingLog() {
+        return showLoadingLog;
+    }
+
+    public void setShowLoadingLog(boolean showLoadingLog) {
+        this.showLoadingLog = showLoadingLog;
+        flush();
+    }
+
+    public boolean isShowUtxosChart() {
+        return showUtxosChart;
+    }
+
+    public void setShowUtxosChart(boolean showUtxosChart) {
+        this.showUtxosChart = showUtxosChart;
+        flush();
+    }
+
    public List<File> getRecentWalletFiles() {
        return recentWalletFiles;
    }
@@ -435,6 +453,10 @@ public class Config {
        Gson gson = getGson();
        try {
            File configFile = getConfigFile();
+            if(!configFile.exists()) {
+                Storage.createOwnerOnlyFile(configFile);
+            }
+
            Writer writer = new FileWriter(configFile);
            gson.toJson(this, writer);
            writer.flush();
@@ -367,7 +367,6 @@ public class Electrum implements KeystoreFileImport, WalletImport, WalletExport
            String json = gson.toJson(eJson);
            outputStream.write(json.getBytes(StandardCharsets.UTF_8));
            outputStream.flush();
-            outputStream.close();
        } catch (Exception e) {
            log.error("Error exporting Electrum Wallet", e);
            throw new ExportException("Error exporting Electrum Wallet", e);
@@ -30,7 +30,10 @@ import java.util.zip.ZipInputStream;

 public class Hwi {
    private static final Logger log = LoggerFactory.getLogger(Hwi.class);
-    private static final String VERSION_PREFIX = "hwi-2.0.1";
+    private static final String HWI_HOME_DIR = "hwi";
+    private static final String HWI_VERSION_PREFIX = "hwi-";
+    private static final String HWI_VERSION = "2.0.2";
+    private static final String HWI_VERSION_DIR = HWI_VERSION_PREFIX + HWI_VERSION;

    private static boolean isPromptActive = false;

@@ -51,7 +54,7 @@ public class Hwi {
            }
            return Arrays.stream(devices).filter(device -> device != null && device.getModel() != null).collect(Collectors.toList());
        } catch(IOException e) {
-            log.error("Error executing " + VERSION_PREFIX, e);
+            log.error("Error executing " + HWI_VERSION_DIR, e);
            throw new ImportException(e);
        } finally {
            isPromptActive = false;
@@ -222,11 +225,12 @@ public class Hwi {
    private synchronized File getHwiExecutable(Command command) {
        File hwiExecutable = Config.get().getHwi();
        if(hwiExecutable != null && hwiExecutable.exists()) {
+            File homeDir = getHwiHomeDir();
            String tmpDir = System.getProperty("java.io.tmpdir");
            String hwiPath = hwiExecutable.getAbsolutePath();
-            if(command.isTestFirst() && hwiPath.startsWith(tmpDir) && (!hwiPath.contains(VERSION_PREFIX) || !testHwi(hwiExecutable))) {
+            if(command.isTestFirst() && (hwiPath.contains(tmpDir) || hwiPath.startsWith(homeDir.getAbsolutePath())) && (!hwiPath.contains(HWI_VERSION_DIR) || !testHwi(hwiExecutable))) {
                if(Platform.getCurrent() == Platform.OSX) {
-                    deleteDirectory(hwiExecutable.getParentFile());
+                    IOUtils.deleteDirectory(hwiExecutable.getParentFile());
                } else {
                    hwiExecutable.delete();
                }
@@ -243,55 +247,65 @@ public class Hwi {
                //The check will still happen on first invocation, but will not thereafter
                //See https://github.com/bitcoin-core/HWI/issues/327 for details
                if(platform == Platform.OSX) {
-                    InputStream inputStream = Hwi.class.getResourceAsStream("/native/osx/x64/" + VERSION_PREFIX + "-mac-amd64-signed.zip");
-                    Path tempHwiDirPath = Files.createTempDirectory(VERSION_PREFIX, PosixFilePermissions.asFileAttribute(ownerExecutableWritable));
-                    File tempHwiDir = tempHwiDirPath.toFile();
-                    //tempHwiDir.deleteOnExit();
-                    log.debug("Using temp HWI path: " + tempHwiDir.getAbsolutePath());
-
-                    File tempExec = null;
-                    ZipInputStream zis = new ZipInputStream(inputStream);
-                    ZipEntry zipEntry = zis.getNextEntry();
-                    while(zipEntry != null) {
-                        if(zipEntry.isDirectory()) {
-                            newDirectory(tempHwiDir, zipEntry, ownerExecutableWritable);
-                        } else {
-                            File newFile = newFile(tempHwiDir, zipEntry, ownerExecutableWritable);
-                            //newFile.deleteOnExit();
-                            FileOutputStream fos = new FileOutputStream(newFile);
-                            ByteStreams.copy(zis, new FileOutputStream(newFile));
-                            fos.flush();
-                            fos.close();
-
-                            if(zipEntry.getName().equals("hwi")) {
-                                tempExec = newFile;
-                            }
-                        }
-
-                        zipEntry = zis.getNextEntry();
+                    InputStream inputStream = Hwi.class.getResourceAsStream("/native/osx/x64/" + HWI_VERSION_DIR + "-mac-amd64-signed.zip");
+                    if(inputStream == null) {
+                        throw new IllegalStateException("Cannot load " + HWI_VERSION_DIR + " from classpath");
                    }
-                    zis.closeEntry();
-                    zis.close();

-                    hwiExecutable = tempExec;
+                    File hwiHomeDir = getHwiHomeDir();
+                    File hwiVersionDir = new File(hwiHomeDir, HWI_VERSION_DIR);
+                    if(!hwiVersionDir.exists()) {
+                        Files.createDirectories(hwiVersionDir.toPath(), PosixFilePermissions.asFileAttribute(ownerExecutableWritable));
+                    }
+
+                    log.debug("Using HWI path: " + hwiVersionDir.getAbsolutePath());
+
+                    File hwiExec = null;
+                    try(ZipInputStream zis = new ZipInputStream(inputStream)) {
+                        ZipEntry zipEntry = zis.getNextEntry();
+                        while(zipEntry != null) {
+                            if(zipEntry.isDirectory()) {
+                                newDirectory(hwiVersionDir, zipEntry, ownerExecutableWritable);
+                            } else {
+                                File newFile = newFile(hwiVersionDir, zipEntry, ownerExecutableWritable);
+                                try(FileOutputStream fos = new FileOutputStream(newFile)) {
+                                    ByteStreams.copy(zis, new FileOutputStream(newFile));
+                                    fos.flush();
+                                };
+
+                                if(zipEntry.getName().equals("hwi")) {
+                                    hwiExec = newFile;
+                                }
+                            }
+
+                            zipEntry = zis.getNextEntry();
+                        }
+                        zis.closeEntry();
+                    }
+
+                    hwiExecutable = hwiExec;
                } else {
                    InputStream inputStream;
                    Path tempExecPath;
                    if(platform == Platform.WINDOWS) {
                        inputStream = Hwi.class.getResourceAsStream("/native/windows/x64/hwi.exe");
-                        tempExecPath = Files.createTempFile(VERSION_PREFIX, null);
+                        tempExecPath = Files.createTempFile(HWI_VERSION_DIR, null);
                    } else {
                        inputStream = Hwi.class.getResourceAsStream("/native/linux/x64/hwi");
-                        tempExecPath = Files.createTempFile(VERSION_PREFIX, null, PosixFilePermissions.asFileAttribute(ownerExecutableWritable));
+                        tempExecPath = Files.createTempFile(HWI_VERSION_DIR, null, PosixFilePermissions.asFileAttribute(ownerExecutableWritable));
+                    }
+
+                    if(inputStream == null) {
+                        throw new IllegalStateException("Cannot load " + HWI_VERSION_DIR + " from classpath");
                    }

                    File tempExec = tempExecPath.toFile();
                    tempExec.deleteOnExit();
-                    OutputStream tempExecStream = new BufferedOutputStream(new FileOutputStream(tempExec));
-                    ByteStreams.copy(inputStream, tempExecStream);
-                    inputStream.close();
-                    tempExecStream.flush();
-                    tempExecStream.close();
+                    try(OutputStream tempExecStream = new BufferedOutputStream(new FileOutputStream(tempExec))) {
+                        ByteStreams.copy(inputStream, tempExecStream);
+                        inputStream.close();
+                        tempExecStream.flush();
+                    };

                    hwiExecutable = tempExec;
                }
@@ -305,6 +319,14 @@ public class Hwi {
        return hwiExecutable;
    }

+    private File getHwiHomeDir() {
+        if(Platform.getCurrent() == Platform.OSX) {
+            return new File(Storage.getSparrowDir(), HWI_HOME_DIR);
+        }
+
+        return new File(System.getProperty("java.io.tmpdir"));
+    }
+
    private boolean testHwi(File hwiExecutable) {
        try {
            List<String> command = List.of(hwiExecutable.getAbsolutePath(), "--version");
@@ -317,17 +339,6 @@ public class Hwi {
        }
    }

-    private boolean deleteDirectory(File directoryToBeDeleted) {
-        File[] allContents = directoryToBeDeleted.listFiles();
-        if (allContents != null) {
-            for (File file : allContents) {
-                deleteDirectory(file);
-            }
-        }
-
-        return directoryToBeDeleted.delete();
-    }
-
    public static File newDirectory(File destinationDir, ZipEntry zipEntry, Set<PosixFilePermission> setFilePermissions) throws IOException {
        String destDirPath = destinationDir.getCanonicalPath();

@@ -1,8 +1,17 @@
 package com.sparrowwallet.sparrow.io;

 import java.io.*;
+import java.net.URI;
+import java.net.URISyntaxException;
+import java.net.URL;
+import java.net.URLDecoder;
 import java.nio.charset.StandardCharsets;
+import java.nio.file.FileSystems;
 import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.*;
+import java.util.jar.JarEntry;
+import java.util.jar.JarFile;

 public class IOUtils {
    public static FileType getFileType(File file) {
@@ -16,10 +25,12 @@ public class IOUtils {
                if(file.exists()) {
                    try(BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(file), StandardCharsets.UTF_8))) {
                        String line = br.readLine();
-                        if(line.startsWith("01000000") || line.startsWith("cHNid")) {
-                            return FileType.TEXT;
-                        } else if(line.startsWith("{")) {
-                            return FileType.JSON;
+                        if(line != null) {
+                            if(line.startsWith("01000000") || line.startsWith("cHNid")) {
+                                return FileType.TEXT;
+                            } else if(line.startsWith("{")) {
+                                return FileType.JSON;
+                            }
                        }
                    }
                }
@@ -36,4 +47,75 @@ public class IOUtils {

        return FileType.UNKNOWN;
    }
+
+    /**
+     * List directory contents for a resource folder. Not recursive.
+     * This is basically a brute-force implementation.
+     * Works for regular files, JARs and Java modules.
+     *
+     * @param clazz Any java class that lives in the same place as the resources you want.
+     * @param path Should end with "/", but not start with one.
+     * @return Just the name of each member item, not the full paths.
+     * @throws URISyntaxException
+     * @throws IOException
+     */
+    public static String[] getResourceListing(Class clazz, String path) throws URISyntaxException, IOException {
+        URL dirURL = clazz.getClassLoader().getResource(path);
+        if(dirURL != null && dirURL.getProtocol().equals("file")) {
+            /* A file path: easy enough */
+            return new File(dirURL.toURI()).list();
+        }
+
+        if(dirURL == null) {
+            /*
+             * In case of a jar file, we can't actually find a directory.
+             * Have to assume the same jar as clazz.
+             */
+            String me = clazz.getName().replace(".", "/")+".class";
+            dirURL = clazz.getClassLoader().getResource(me);
+        }
+
+        if(dirURL.getProtocol().equals("jar")) {
+            /* A JAR path */
+            String jarPath = dirURL.getPath().substring(5, dirURL.getPath().indexOf("!")); //strip out only the JAR file
+            JarFile jar = new JarFile(URLDecoder.decode(jarPath, "UTF-8"));
+            Enumeration<JarEntry> entries = jar.entries(); //gives ALL entries in jar
+            Set<String> result = new HashSet<String>(); //avoid duplicates in case it is a subdirectory
+            while(entries.hasMoreElements()) {
+                String name = entries.nextElement().getName();
+                if(name.startsWith(path)) { //filter according to the path
+                    String entry = name.substring(path.length());
+                    int checkSubdir = entry.indexOf("/");
+                    if (checkSubdir >= 0) {
+                        // if it is a subdirectory, we just return the directory name
+                        entry = entry.substring(0, checkSubdir);
+                    }
+                    result.add(entry);
+                }
+            }
+
+            return result.toArray(new String[result.size()]);
+        }
+
+        if(dirURL.getProtocol().equals("jrt")) {
+            java.nio.file.FileSystem jrtFs = FileSystems.newFileSystem(URI.create("jrt:/"), Collections.emptyMap());
+            Path resourcePath = jrtFs.getPath("modules/com.sparrowwallet.sparrow", path);
+            return Files.list(resourcePath).map(filePath -> filePath.getFileName().toString()).toArray(String[]::new);
+        }
+
+        throw new UnsupportedOperationException("Cannot list files for URL " + dirURL);
+    }
+
+    public static boolean deleteDirectory(File directory) {
+        try {
+            Files.walk(directory.toPath())
+                    .sorted(Comparator.reverseOrder())
+                    .map(Path::toFile)
+                    .forEach(File::delete);
+        } catch(IOException e) {
+            return false;
+        }
+
+        return true;
+    }
 }
@@ -0,0 +1,484 @@
+package com.sparrowwallet.sparrow.io;
+
+import com.google.gson.*;
+import com.sparrowwallet.drongo.ExtendedKey;
+import com.sparrowwallet.drongo.Utils;
+import com.sparrowwallet.drongo.crypto.Argon2KeyDeriver;
+import com.sparrowwallet.drongo.crypto.AsymmetricKeyDeriver;
+import com.sparrowwallet.drongo.crypto.ECKey;
+import com.sparrowwallet.drongo.protocol.Sha256Hash;
+import com.sparrowwallet.drongo.protocol.Transaction;
+import com.sparrowwallet.drongo.wallet.Keystore;
+import com.sparrowwallet.drongo.wallet.Wallet;
+import com.sparrowwallet.drongo.wallet.WalletNode;
+
+import java.io.*;
+import java.lang.reflect.Type;
+import java.nio.ByteBuffer;
+import java.nio.charset.StandardCharsets;
+import java.security.SecureRandom;
+import java.util.*;
+import java.util.stream.Collectors;
+import java.util.zip.DeflaterOutputStream;
+import java.util.zip.InflaterInputStream;
+
+import static com.sparrowwallet.drongo.crypto.Argon2KeyDeriver.SPRW1_PARAMETERS;
+
+public class JsonPersistence implements Persistence {
+    public static final String HEADER_MAGIC_1 = "SPRW1";
+    public static final int BINARY_HEADER_LENGTH = 28;
+
+    private final Gson gson;
+    private AsymmetricKeyDeriver keyDeriver;
+
+    public JsonPersistence() {
+        this.gson = getGson();
+    }
+
+    @Override
+    public WalletBackupAndKey loadWallet(Storage storage) throws IOException, StorageException {
+        Wallet wallet;
+
+        try(Reader reader = new FileReader(storage.getWalletFile())) {
+            wallet = gson.fromJson(reader, Wallet.class);
+        }
+
+        Map<Storage, WalletBackupAndKey> childWallets = loadChildWallets(storage, wallet, null);
+        wallet.setChildWallets(childWallets.values().stream().map(WalletBackupAndKey::getWallet).collect(Collectors.toList()));
+
+        File backupFile = storage.getTempBackup();
+        Wallet backupWallet = backupFile == null ? null : loadWallet(backupFile, null);
+
+        return new WalletBackupAndKey(wallet, backupWallet, null, null, childWallets);
+    }
+
+    @Override
+    public WalletBackupAndKey loadWallet(Storage storage, CharSequence password) throws IOException, StorageException {
+        return loadWallet(storage, password, null);
+    }
+
+    @Override
+    public WalletBackupAndKey loadWallet(Storage storage, CharSequence password, ECKey alreadyDerivedKey) throws IOException, StorageException {
+        Wallet wallet;
+        ECKey encryptionKey;
+
+        try(InputStream fileStream = new FileInputStream(storage.getWalletFile())) {
+            encryptionKey = getEncryptionKey(password, fileStream, alreadyDerivedKey);
+            Reader reader = new InputStreamReader(new InflaterInputStream(new ECIESInputStream(fileStream, encryptionKey, getEncryptionMagic())), StandardCharsets.UTF_8);
+            wallet = gson.fromJson(reader, Wallet.class);
+        }
+
+        Map<Storage, WalletBackupAndKey> childWallets = loadChildWallets(storage, wallet, encryptionKey);
+        wallet.setChildWallets(childWallets.values().stream().map(WalletBackupAndKey::getWallet).collect(Collectors.toList()));
+
+        File backupFile = storage.getTempBackup();
+        Wallet backupWallet = backupFile == null ? null : loadWallet(backupFile, encryptionKey);
+
+        return new WalletBackupAndKey(wallet, backupWallet, encryptionKey, keyDeriver, childWallets);
+    }
+
+    private Map<Storage, WalletBackupAndKey> loadChildWallets(Storage storage, Wallet masterWallet, ECKey encryptionKey) throws IOException, StorageException {
+        File[] walletFiles = getChildWalletFiles(storage.getWalletFile(), masterWallet);
+        Map<Storage, WalletBackupAndKey> childWallets = new LinkedHashMap<>();
+        for(File childFile : walletFiles) {
+            Wallet childWallet = loadWallet(childFile, encryptionKey);
+            Storage childStorage = new Storage(childFile);
+            childStorage.setEncryptionPubKey(encryptionKey == null ? Storage.NO_PASSWORD_KEY : ECKey.fromPublicOnly(encryptionKey));
+            childStorage.setKeyDeriver(getKeyDeriver());
+            childWallet.setMasterWallet(masterWallet);
+            childWallets.put(childStorage, new WalletBackupAndKey(childWallet, null, encryptionKey, keyDeriver, Collections.emptyMap()));
+        }
+
+        return childWallets;
+    }
+
+    private Wallet loadWallet(File walletFile, ECKey encryptionKey) throws IOException, StorageException {
+        if(encryptionKey != null) {
+            try(InputStream fileStream = new FileInputStream(walletFile)) {
+                encryptionKey = getEncryptionKey(null, fileStream, encryptionKey);
+                Reader reader = new InputStreamReader(new InflaterInputStream(new ECIESInputStream(fileStream, encryptionKey, getEncryptionMagic())), StandardCharsets.UTF_8);
+                return gson.fromJson(reader, Wallet.class);
+            }
+        } else {
+            try(Reader reader = new FileReader(walletFile)) {
+                return gson.fromJson(reader, Wallet.class);
+            }
+        }
+    }
+
+    private File[] getChildWalletFiles(File walletFile, Wallet masterWallet) {
+        File childDir = new File(walletFile.getParentFile(), masterWallet.getName() + "-child");
+        if(!childDir.exists()) {
+            return new File[0];
+        }
+
+        File[] childFiles = childDir.listFiles(pathname -> {
+            FileType fileType = IOUtils.getFileType(pathname);
+            return pathname.getName().startsWith(masterWallet.getName()) && (fileType == FileType.BINARY || fileType == FileType.JSON);
+        });
+
+        return childFiles == null ? new File[0] : childFiles;
+    }
+
+    @Override
+    public File storeWallet(Storage storage, Wallet wallet) throws IOException {
+        File walletFile = storage.getWalletFile();
+
+        if(!walletFile.getName().endsWith(".json")) {
+            File jsonFile = new File(walletFile.getParentFile(), walletFile.getName() + ".json");
+            if(walletFile.exists()) {
+                if(!walletFile.renameTo(jsonFile)) {
+                    throw new IOException("Could not rename " + walletFile.getName() + " to " + jsonFile.getName());
+                }
+            }
+            walletFile = jsonFile;
+        }
+
+        if(!walletFile.exists()) {
+            Storage.createOwnerOnlyFile(walletFile);
+        }
+
+        try(Writer writer = new FileWriter(walletFile)) {
+            gson.toJson(wallet, writer);
+        }
+
+        return walletFile;
+    }
+
+    @Override
+    public File storeWallet(Storage storage, Wallet wallet, ECKey encryptionPubKey) throws IOException {
+        File walletFile = storage.getWalletFile();
+
+        if(walletFile.getName().endsWith(".json")) {
+            File noJsonFile = new File(walletFile.getParentFile(), walletFile.getName().substring(0, walletFile.getName().lastIndexOf('.')));
+            if(walletFile.exists()) {
+                if(!walletFile.renameTo(noJsonFile)) {
+                    throw new IOException("Could not rename " + walletFile.getName() + " to " + noJsonFile.getName());
+                }
+            }
+            walletFile = noJsonFile;
+        }
+
+        if(!walletFile.exists()) {
+            Storage.createOwnerOnlyFile(walletFile);
+        }
+
+        try(OutputStream outputStream = new FileOutputStream(walletFile)) {
+            writeBinaryHeader(outputStream);
+            OutputStreamWriter writer = new OutputStreamWriter(new DeflaterOutputStream(new ECIESOutputStream(outputStream, encryptionPubKey, getEncryptionMagic())), StandardCharsets.UTF_8);
+            gson.toJson(wallet, writer);
+            //Close the writer explicitly as the try-resources block will not do so
+            writer.close();
+        }
+
+        return walletFile;
+    }
+
+    @Override
+    public void updateWallet(Storage storage, Wallet wallet) throws IOException {
+        storeWallet(storage, wallet);
+    }
+
+    @Override
+    public void updateWallet(Storage storage, Wallet wallet, ECKey encryptionPubKey) throws IOException {
+        storeWallet(storage, wallet, encryptionPubKey);
+    }
+
+    private void writeBinaryHeader(OutputStream outputStream) throws IOException {
+        ByteBuffer buf = ByteBuffer.allocate(21);
+        buf.put(HEADER_MAGIC_1.getBytes(StandardCharsets.UTF_8));
+        buf.put(keyDeriver.getSalt());
+
+        byte[] encoded = Base64.getEncoder().encode(buf.array());
+        if(encoded.length != BINARY_HEADER_LENGTH) {
+            throw new IllegalStateException("Header length not " + BINARY_HEADER_LENGTH + " bytes");
+        }
+        outputStream.write(encoded);
+    }
+
+    private static byte[] getEncryptionMagic() {
+        return "BIE1".getBytes(StandardCharsets.UTF_8);
+    }
+
+    @Override
+    public ECKey getEncryptionKey(CharSequence password) throws IOException, StorageException {
+        return getEncryptionKey(password, null, null);
+    }
+
+    private ECKey getEncryptionKey(CharSequence password, InputStream inputStream, ECKey alreadyDerivedKey) throws IOException, StorageException {
+        if(password != null && password.equals("")) {
+            return Storage.NO_PASSWORD_KEY;
+        }
+
+        AsymmetricKeyDeriver keyDeriver = getKeyDeriver(inputStream);
+        return alreadyDerivedKey == null ?  keyDeriver.deriveECKey(password) : alreadyDerivedKey;
+    }
+
+    @Override
+    public AsymmetricKeyDeriver getKeyDeriver() {
+        return keyDeriver;
+    }
+
+    @Override
+    public void setKeyDeriver(AsymmetricKeyDeriver keyDeriver) {
+        this.keyDeriver = keyDeriver;
+    }
+
+    private AsymmetricKeyDeriver getKeyDeriver(InputStream inputStream) throws IOException, StorageException {
+        if(keyDeriver == null) {
+            keyDeriver = getWalletKeyDeriver(inputStream);
+        } else if(inputStream != null) {
+            inputStream.skip(BINARY_HEADER_LENGTH);
+        }
+
+        return keyDeriver;
+    }
+
+    private AsymmetricKeyDeriver getWalletKeyDeriver(InputStream inputStream) throws IOException, StorageException {
+        byte[] salt = new byte[SPRW1_PARAMETERS.saltLength];
+
+        if(inputStream != null) {
+            byte[] header = new byte[BINARY_HEADER_LENGTH];
+            int read = inputStream.read(header);
+            if(read != BINARY_HEADER_LENGTH) {
+                throw new StorageException("Not a Sparrow wallet - invalid header");
+            }
+            try {
+                byte[] decodedHeader = Base64.getDecoder().decode(header);
+                byte[] magic = Arrays.copyOfRange(decodedHeader, 0, HEADER_MAGIC_1.length());
+                if(!HEADER_MAGIC_1.equals(new String(magic, StandardCharsets.UTF_8))) {
+                    throw new StorageException("Not a Sparrow wallet - invalid magic");
+                }
+                salt = Arrays.copyOfRange(decodedHeader, HEADER_MAGIC_1.length(), decodedHeader.length);
+            } catch(IllegalArgumentException e) {
+                throw new StorageException("Not a Sparrow wallet - invalid header");
+            }
+        } else {
+            SecureRandom secureRandom = new SecureRandom();
+            secureRandom.nextBytes(salt);
+        }
+
+        return new Argon2KeyDeriver(salt);
+    }
+
+    @Override
+    public PersistenceType getType() {
+        return PersistenceType.JSON;
+    }
+
+    @Override
+    public boolean isEncrypted(File walletFile) throws IOException {
+        FileType fileType = IOUtils.getFileType(walletFile);
+        if(FileType.JSON.equals(fileType)) {
+            return false;
+        } else if(FileType.BINARY.equals(fileType)) {
+            try(FileInputStream fileInputStream = new FileInputStream(walletFile)) {
+                getWalletKeyDeriver(fileInputStream);
+                return true;
+            } catch(StorageException e) {
+                return false;
+            }
+        }
+
+        throw new IOException("Unsupported file type");
+    }
+
+    @Override
+    public String getWalletId(Storage storage, Wallet wallet) {
+        return storage.getWalletFile().getParentFile().getAbsolutePath() + File.separator + getWalletName(storage.getWalletFile(), null) + ":" + (wallet == null || wallet.isMasterWallet() ? "master" : wallet.getName());
+    }
+
+    @Override
+    public String getWalletName(File walletFile, Wallet wallet) {
+        String name = walletFile.getName();
+        if(name.endsWith("." + getType().getExtension())) {
+            name = name.substring(0, name.lastIndexOf('.'));
+        }
+
+        return name;
+    }
+
+    @Override
+    public void copyWallet(File walletFile, OutputStream outputStream) throws IOException {
+        com.google.common.io.Files.copy(walletFile, outputStream);
+    }
+
+    @Override
+    public void close() {
+        //Nothing required
+    }
+
+    public static Gson getGson() {
+        return getGson(true);
+    }
+
+    private static Gson getGson(boolean includeWalletSerializers) {
+        GsonBuilder gsonBuilder = new GsonBuilder();
+        gsonBuilder.registerTypeAdapter(ExtendedKey.class, new ExtendedPublicKeySerializer());
+        gsonBuilder.registerTypeAdapter(ExtendedKey.class, new ExtendedPublicKeyDeserializer());
+        gsonBuilder.registerTypeAdapter(byte[].class, new ByteArraySerializer());
+        gsonBuilder.registerTypeAdapter(byte[].class, new ByteArrayDeserializer());
+        gsonBuilder.registerTypeAdapter(Sha256Hash.class, new Sha256HashSerializer());
+        gsonBuilder.registerTypeAdapter(Sha256Hash.class, new Sha256HashDeserializer());
+        gsonBuilder.registerTypeAdapter(Date.class, new DateSerializer());
+        gsonBuilder.registerTypeAdapter(Date.class, new DateDeserializer());
+        gsonBuilder.registerTypeAdapter(Transaction.class, new TransactionSerializer());
+        gsonBuilder.registerTypeAdapter(Transaction.class, new TransactionDeserializer());
+        if(includeWalletSerializers) {
+            gsonBuilder.registerTypeAdapter(Keystore.class, new KeystoreSerializer());
+            gsonBuilder.registerTypeAdapter(WalletNode.class, new NodeSerializer());
+            gsonBuilder.registerTypeAdapter(WalletNode.class, new NodeDeserializer());
+        }
+
+        gsonBuilder.addSerializationExclusionStrategy(new ExclusionStrategy() {
+            @Override
+            public boolean shouldSkipField(FieldAttributes field) {
+                return field.getName().equals("id") || field.getName().equals("masterWallet") || field.getName().equals("childWallets");
+            }
+
+            @Override
+            public boolean shouldSkipClass(Class<?> clazz) {
+                return false;
+            }
+        });
+
+        return gsonBuilder.setPrettyPrinting().disableHtmlEscaping().create();
+    }
+
+    private static class ExtendedPublicKeySerializer implements JsonSerializer<ExtendedKey> {
+        @Override
+        public JsonElement serialize(ExtendedKey src, Type typeOfSrc, JsonSerializationContext context) {
+            return new JsonPrimitive(src.toString());
+        }
+    }
+
+    private static class ExtendedPublicKeyDeserializer implements JsonDeserializer<ExtendedKey> {
+        @Override
+        public ExtendedKey deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {
+            return ExtendedKey.fromDescriptor(json.getAsJsonPrimitive().getAsString());
+        }
+    }
+
+    private static class ByteArraySerializer implements JsonSerializer<byte[]> {
+        @Override
+        public JsonElement serialize(byte[] src, Type typeOfSrc, JsonSerializationContext context) {
+            return new JsonPrimitive(Utils.bytesToHex(src));
+        }
+    }
+
+    private static class ByteArrayDeserializer implements JsonDeserializer<byte[]> {
+        @Override
+        public byte[] deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {
+            return Utils.hexToBytes(json.getAsJsonPrimitive().getAsString());
+        }
+    }
+
+    private static class Sha256HashSerializer implements JsonSerializer<Sha256Hash> {
+        @Override
+        public JsonElement serialize(Sha256Hash src, Type typeOfSrc, JsonSerializationContext context) {
+            return new JsonPrimitive(src.toString());
+        }
+    }
+
+    private static class Sha256HashDeserializer implements JsonDeserializer<Sha256Hash> {
+        @Override
+        public Sha256Hash deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {
+            return Sha256Hash.wrap(json.getAsJsonPrimitive().getAsString());
+        }
+    }
+
+    private static class DateSerializer implements JsonSerializer<Date> {
+        @Override
+        public JsonElement serialize(Date src, Type typeOfSrc, JsonSerializationContext context) {
+            return new JsonPrimitive(src.getTime());
+        }
+    }
+
+    private static class DateDeserializer implements JsonDeserializer<Date> {
+        @Override
+        public Date deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {
+            return new Date(json.getAsJsonPrimitive().getAsLong());
+        }
+    }
+
+    private static class TransactionSerializer implements JsonSerializer<Transaction> {
+        @Override
+        public JsonElement serialize(Transaction src, Type typeOfSrc, JsonSerializationContext context) {
+            try {
+                ByteArrayOutputStream baos = new ByteArrayOutputStream();
+                src.bitcoinSerializeToStream(baos);
+                return new JsonPrimitive(Utils.bytesToHex(baos.toByteArray()));
+            } catch (IOException e) {
+                throw new IllegalStateException(e);
+            }
+        }
+    }
+
+    private static class TransactionDeserializer implements JsonDeserializer<Transaction> {
+        @Override
+        public Transaction deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {
+            byte[] rawTx = Utils.hexToBytes(json.getAsJsonPrimitive().getAsString());
+            return new Transaction(rawTx);
+        }
+    }
+
+    private static class KeystoreSerializer implements JsonSerializer<Keystore> {
+        @Override
+        public JsonElement serialize(Keystore keystore, Type typeOfSrc, JsonSerializationContext context) {
+            JsonObject jsonObject = (JsonObject)getGson(false).toJsonTree(keystore);
+            if(keystore.hasPrivateKey()) {
+                jsonObject.remove("extendedPublicKey");
+                jsonObject.getAsJsonObject("keyDerivation").remove("masterFingerprint");
+            }
+
+            return jsonObject;
+        }
+    }
+
+    private static class NodeSerializer implements JsonSerializer<WalletNode> {
+        @Override
+        public JsonElement serialize(WalletNode node, Type typeOfSrc, JsonSerializationContext context) {
+            JsonObject jsonObject = (JsonObject)getGson(false).toJsonTree(node);
+
+            JsonArray children = jsonObject.getAsJsonArray("children");
+            Iterator<JsonElement> iter = children.iterator();
+            while(iter.hasNext()) {
+                JsonObject childObject = (JsonObject)iter.next();
+                removeEmptyCollection(childObject, "children");
+                removeEmptyCollection(childObject, "transactionOutputs");
+
+                if(childObject.get("label") == null && childObject.get("children") == null && childObject.get("transactionOutputs") == null) {
+                    iter.remove();
+                }
+            }
+
+            return jsonObject;
+        }
+
+        private void removeEmptyCollection(JsonObject jsonObject, String memberName) {
+            if(jsonObject.get(memberName) != null && jsonObject.getAsJsonArray(memberName).size() == 0) {
+                jsonObject.remove(memberName);
+            }
+        }
+    }
+
+    private static class NodeDeserializer implements JsonDeserializer<WalletNode> {
+        @Override
+        public WalletNode deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {
+            WalletNode node = getGson(false).fromJson(json, typeOfT);
+            node.parseDerivation();
+
+            for(WalletNode childNode : node.getChildren()) {
+                childNode.parseDerivation();
+                if(childNode.getChildren() == null) {
+                    childNode.setChildren(new TreeSet<>());
+                }
+                if(childNode.getTransactionOutputs() == null) {
+                    childNode.setTransactionOutputs(new TreeSet<>());
+                }
+            }
+
+            return node;
+        }
+    }
+}
@@ -0,0 +1,70 @@
+package com.sparrowwallet.sparrow.io;
+
+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 java.io.InputStream;
+
+public class KeystoneMultisig extends ColdcardMultisig {
+    @Override
+    public String getName() {
+        return "Keystone Multisig";
+    }
+
+    @Override
+    public WalletModel getWalletModel() {
+        return WalletModel.KEYSTONE;
+    }
+
+    @Override
+    public Keystore getKeystore(ScriptType scriptType, InputStream inputStream, String password) throws ImportException {
+        Keystore keystore = super.getKeystore(scriptType, inputStream, password);
+        keystore.setLabel("Keystone");
+        keystore.setWalletModel(getWalletModel());
+
+        return keystore;
+    }
+
+    @Override
+    public String getKeystoreImportDescription() {
+        return "Import file or QR created by using the Multisig Wallet > ... > Show/Export XPUB feature on your Keystone.";
+    }
+
+    @Override
+    public Wallet importWallet(InputStream inputStream, String password) throws ImportException {
+        Wallet wallet = super.importWallet(inputStream, password);
+        for(Keystore keystore : wallet.getKeystores()) {
+            keystore.setLabel(keystore.getLabel().replace("Coldcard", "Keystone"));
+            keystore.setWalletModel(WalletModel.KEYSTONE);
+        }
+
+        return wallet;
+    }
+
+    @Override
+    public String getWalletImportDescription() {
+        return "Import file or QR created by using the Multisig Wallet > ... > Create Multisig Wallet feature on your Keystone.";
+    }
+
+    @Override
+    public String getWalletExportDescription() {
+        return "Export file or QR that can be read by your Keystone using the Multisig Wallet > ... > Import Multisig Wallet feature.";
+    }
+
+    @Override
+    public boolean isWalletImportScannable() {
+        return true;
+    }
+
+    @Override
+    public boolean isKeystoreImportScannable() {
+        return true;
+    }
+
+    @Override
+    public boolean isWalletExportScannable() {
+        return true;
+    }
+}
@@ -0,0 +1,112 @@
+package com.sparrowwallet.sparrow.io;
+
+import com.google.gson.Gson;
+import com.sparrowwallet.drongo.ExtendedKey;
+import com.sparrowwallet.drongo.KeyDerivation;
+import com.sparrowwallet.drongo.OutputDescriptor;
+import com.sparrowwallet.drongo.policy.Policy;
+import com.sparrowwallet.drongo.policy.PolicyType;
+import com.sparrowwallet.drongo.protocol.ScriptType;
+import com.sparrowwallet.drongo.wallet.*;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.nio.charset.StandardCharsets;
+import java.util.stream.Collectors;
+
+public class KeystoneSinglesig implements KeystoreFileImport, WalletImport {
+    private static final Logger log = LoggerFactory.getLogger(KeystoneSinglesig.class);
+
+    @Override
+    public String getName() {
+        return "Keystone";
+    }
+
+    @Override
+    public String getKeystoreImportDescription() {
+        return "Import file or QR created by using the My Keystone > ... > Export Wallet feature on your Keystone. Make sure to set the Watch-only Wallet to Sparrow in the Settings first.";
+    }
+
+    @Override
+    public WalletModel getWalletModel() {
+        return WalletModel.KEYSTONE;
+    }
+
+    @Override
+    public Keystore getKeystore(ScriptType scriptType, InputStream inputStream, String password) throws ImportException {
+        try {
+            String outputDescriptor = new BufferedReader(new InputStreamReader(inputStream, StandardCharsets.UTF_8)).lines().collect(Collectors.joining("\n"));
+            OutputDescriptor descriptor = OutputDescriptor.getOutputDescriptor(outputDescriptor);
+
+            if(descriptor.isMultisig()) {
+                throw new IllegalArgumentException("Output descriptor describes a multisig wallet");
+            }
+
+            if(descriptor.getScriptType() != scriptType) {
+                throw new IllegalArgumentException("Output descriptor describes a " + descriptor.getScriptType().getDescription() + " wallet");
+            }
+
+            ExtendedKey xpub = descriptor.getSingletonExtendedPublicKey();
+            KeyDerivation keyDerivation = descriptor.getKeyDerivation(xpub);
+
+            Keystore keystore = new Keystore();
+            keystore.setLabel(getName());
+            keystore.setSource(KeystoreSource.HW_AIRGAPPED);
+            keystore.setWalletModel(WalletModel.KEYSTONE);
+            keystore.setKeyDerivation(keyDerivation);
+            keystore.setExtendedPublicKey(xpub);
+
+            return keystore;
+        } catch (IllegalArgumentException e) {
+            log.error("Error getting Keystone keystore - not an output descriptor");
+            throw new ImportException("Error getting Keystone keystore", e);
+        } catch (Exception e) {
+            log.error("Error getting Keystone keystore", e);
+            throw new ImportException("Error getting Keystone keystore", e);
+        }
+    }
+
+    @Override
+    public String getWalletImportDescription() {
+        return getKeystoreImportDescription();
+    }
+
+    @Override
+    public Wallet importWallet(InputStream inputStream, String password) throws ImportException {
+        //Use default of P2WPKH
+        Keystore keystore = getKeystore(ScriptType.P2WPKH, inputStream, "");
+
+        Wallet wallet = new Wallet();
+        wallet.setPolicyType(PolicyType.SINGLE);
+        wallet.setScriptType(ScriptType.P2WPKH);
+        wallet.getKeystores().add(keystore);
+        wallet.setDefaultPolicy(Policy.getPolicy(PolicyType.SINGLE, ScriptType.P2WPKH, wallet.getKeystores(), null));
+
+        try {
+            wallet.checkWallet();
+        } catch(InvalidWalletException e) {
+            throw new ImportException("Imported Keystone wallet was invalid: " + e.getMessage());
+        }
+
+        return wallet;
+    }
+
+    @Override
+    public boolean isEncrypted(File file) {
+        return false;
+    }
+
+    @Override
+    public boolean isWalletImportScannable() {
+        return true;
+    }
+
+    @Override
+    public boolean isKeystoreImportScannable() {
+        return true;
+    }
+}
@@ -0,0 +1,28 @@
+package com.sparrowwallet.sparrow.io;
+
+import com.sparrowwallet.drongo.crypto.AsymmetricKeyDeriver;
+import com.sparrowwallet.drongo.crypto.ECKey;
+import com.sparrowwallet.drongo.wallet.Wallet;
+
+import java.io.File;
+import java.io.IOException;
+import java.io.OutputStream;
+
+public interface Persistence {
+    WalletBackupAndKey loadWallet(Storage storage) throws IOException, StorageException;
+    WalletBackupAndKey loadWallet(Storage storage, CharSequence password) throws IOException, StorageException;
+    WalletBackupAndKey loadWallet(Storage storage, CharSequence password, ECKey alreadyDerivedKey) throws IOException, StorageException;
+    File storeWallet(Storage storage, Wallet wallet) throws IOException, StorageException;
+    File storeWallet(Storage storage, Wallet wallet, ECKey encryptionPubKey) throws IOException, StorageException;
+    void updateWallet(Storage storage, Wallet wallet) throws IOException, StorageException;
+    void updateWallet(Storage storage, Wallet wallet, ECKey encryptionPubKey) throws IOException, StorageException;
+    ECKey getEncryptionKey(CharSequence password) throws IOException, StorageException;
+    AsymmetricKeyDeriver getKeyDeriver();
+    void setKeyDeriver(AsymmetricKeyDeriver keyDeriver);
+    PersistenceType getType();
+    boolean isEncrypted(File walletFile) throws IOException;
+    String getWalletId(Storage storage, Wallet wallet);
+    String getWalletName(File walletFile, Wallet wallet);
+    void copyWallet(File walletFile, OutputStream outputStream) throws IOException;
+    void close();
+}
@@ -0,0 +1,42 @@
+package com.sparrowwallet.sparrow.io;
+
+import com.sparrowwallet.sparrow.io.db.DbPersistence;
+
+public enum PersistenceType {
+    JSON("json") {
+        @Override
+        public String getExtension() {
+            return getName();
+        }
+
+        @Override
+        public Persistence getInstance() {
+            return new JsonPersistence();
+        }
+    },
+    DB("db") {
+        @Override
+        public String getExtension() {
+            return "mv.db";
+        }
+
+        @Override
+        public Persistence getInstance() {
+            return new DbPersistence();
+        }
+    };
+
+    private final String name;
+
+    private PersistenceType(String name) {
+        this.name = name;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public abstract String getExtension();
+
+    public abstract Persistence getInstance();
+}
@@ -1,15 +1,19 @@
 package com.sparrowwallet.sparrow.io;

+import com.google.common.io.Files;
 import com.sparrowwallet.drongo.wallet.Wallet;
 import com.sparrowwallet.drongo.wallet.WalletModel;
 import com.sparrowwallet.sparrow.AppServices;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;

+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
 import java.io.OutputStream;
-import java.nio.file.Files;
+import java.nio.file.StandardCopyOption;

-public class Sparrow implements WalletExport {
+public class Sparrow implements WalletImport, WalletExport {
    private static final Logger log = LoggerFactory.getLogger(Sparrow.class);

    @Override
@@ -26,9 +30,14 @@ public class Sparrow implements WalletExport {
    public void exportWallet(Wallet wallet, OutputStream outputStream) throws ExportException {
        try {
            Storage storage = AppServices.get().getOpenWallets().get(wallet);
-            Files.copy(storage.getWalletFile().toPath(), outputStream);
+            File tempFile = File.createTempFile(wallet.getName(), null);
+            Storage tempStorage = new Storage(PersistenceType.JSON, tempFile);
+            tempStorage.setKeyDeriver(storage.getKeyDeriver());
+            tempStorage.setEncryptionPubKey(storage.getEncryptionPubKey());
+            tempStorage.saveWallet(wallet);
+            Files.copy(tempStorage.getWalletFile(), outputStream);
            outputStream.flush();
-            outputStream.close();
+            tempStorage.getWalletFile().delete();
        } catch(Exception e) {
            log.error("Error exporting Sparrow wallet file", e);
            throw new ExportException("Error exporting Sparrow wallet file", e);
@@ -37,14 +46,16 @@ public class Sparrow implements WalletExport {

    @Override
    public String getWalletExportDescription() {
-        return "Exports a copy of your Sparrow wallet file, which can be loaded in another Sparrow instance running on any supported platform.";
+        return "Exports your Sparrow wallet file, which can be imported into another Sparrow instance running on any supported platform.";
    }

    @Override
    public String getExportFileExtension(Wallet wallet) {
-        Storage storage = AppServices.get().getOpenWallets().get(wallet);
-        if(storage != null && (storage.getEncryptionPubKey() == null || Storage.NO_PASSWORD_KEY.equals(storage.getEncryptionPubKey()))) {
-            return "json";
+        try {
+            Storage storage = AppServices.get().getOpenWallets().get(wallet);
+            return storage.isEncrypted() ? "" : PersistenceType.JSON.getExtension();
+        } catch(IOException e) {
+            //ignore
        }

        return "";
@@ -59,4 +70,41 @@ public class Sparrow implements WalletExport {
    public boolean walletExportRequiresDecryption() {
        return false;
    }
+
+    @Override
+    public boolean isEncrypted(File file) {
+        return Storage.isEncrypted(file);
+    }
+
+    @Override
+    public String getWalletImportDescription() {
+        return "Imports an exported Sparrow wallet file into Sparrow's wallets folder.";
+    }
+
+    @Override
+    public Wallet importWallet(InputStream inputStream, String password) throws ImportException {
+        File tempFile = null;
+        try {
+            tempFile = File.createTempFile("sparrow", null);
+            java.nio.file.Files.copy(inputStream, tempFile.toPath(), StandardCopyOption.REPLACE_EXISTING);
+            Storage storage = new Storage(PersistenceType.JSON, tempFile);
+            if(!isEncrypted(tempFile)) {
+                return storage.loadUnencryptedWallet().getWallet();
+            } else {
+                return storage.loadEncryptedWallet(password).getWallet();
+            }
+        } catch(IOException | StorageException e) {
+            log.error("Error importing Sparrow wallet", e);
+            throw new ImportException("Error importing Sparrow wallet", e);
+        } finally {
+            if(tempFile != null) {
+                tempFile.delete();
+            }
+        }
+    }
+
+    @Override
+    public boolean isWalletImportScannable() {
+        return false;
+    }
 }
@@ -10,13 +10,10 @@ import com.sparrowwallet.drongo.wallet.WalletModel;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;

-import java.io.File;
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.InputStreamReader;
+import java.io.*;
 import java.nio.charset.StandardCharsets;

-public class SpecterDIY implements KeystoreFileImport {
+public class SpecterDIY implements KeystoreFileImport, WalletExport {
    private static final Logger log = LoggerFactory.getLogger(SpecterDIY.class);

    @Override
@@ -67,4 +64,36 @@ public class SpecterDIY implements KeystoreFileImport {
    public WalletModel getWalletModel() {
        return WalletModel.SPECTER_DIY;
    }
+
+    @Override
+    public void exportWallet(Wallet wallet, OutputStream outputStream) throws ExportException {
+        try {
+            BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(outputStream, StandardCharsets.UTF_8));
+            writer.append("addwallet ").append(wallet.getName()).append("&").append(OutputDescriptor.getOutputDescriptor(wallet).toString().replace('\'', 'h')).append("\n");
+            writer.flush();
+        } catch(Exception e) {
+            log.error("Error exporting Specter DIY wallet", e);
+            throw new ExportException("Error exporting Specter DIY wallet", e);
+        }
+    }
+
+    @Override
+    public String getWalletExportDescription() {
+        return "Export file or QR that can be read by your Specter DIY using the Wallets > Add Wallet feature.";
+    }
+
+    @Override
+    public String getExportFileExtension(Wallet wallet) {
+        return "txt";
+    }
+
+    @Override
+    public boolean isWalletExportScannable() {
+        return true;
+    }
+
+    @Override
+    public boolean walletExportRequiresDecryption() {
+        return false;
+    }
 }
@@ -31,7 +31,6 @@ public class SpecterDesktop implements WalletImport, WalletExport {
            String json = gson.toJson(specterWallet);
            outputStream.write(json.getBytes(StandardCharsets.UTF_8));
            outputStream.flush();
-            outputStream.close();
        } catch(Exception e) {
            log.error("Error exporting Specter Desktop wallet", e);
            throw new ExportException("Error exporting Specter Desktop wallet", e);
@@ -50,7 +49,7 @@ public class SpecterDesktop implements WalletImport, WalletExport {

    @Override
    public String getWalletImportDescription() {
-        return "Import a Specter wallet created by using the Wallets > Settings > Export to Wallet Software in Specter Desktop";
+        return "Import a Specter wallet created by using the Wallets > Settings > Export to Wallet Software in Specter Desktop. Note Connected (USB) Hardware Wallets may need to be reimported separately as the export file may not contain this information.";
    }

    @Override
@@ -1,17 +1,10 @@
 package com.sparrowwallet.sparrow.io;

-import com.google.common.io.Files;
-import com.google.gson.*;
-import com.sparrowwallet.drongo.ExtendedKey;
 import com.sparrowwallet.drongo.Network;
 import com.sparrowwallet.drongo.SecureString;
 import com.sparrowwallet.drongo.Utils;
 import com.sparrowwallet.drongo.crypto.*;
-import com.sparrowwallet.drongo.protocol.Sha256Hash;
-import com.sparrowwallet.drongo.protocol.Transaction;
-import com.sparrowwallet.drongo.wallet.Keystore;
 import com.sparrowwallet.drongo.wallet.Wallet;
-import com.sparrowwallet.drongo.wallet.WalletNode;
 import com.sparrowwallet.sparrow.MainApp;
 import javafx.concurrent.Service;
 import javafx.concurrent.Task;
@@ -20,10 +13,9 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;

 import java.io.*;
-import java.lang.reflect.Type;
-import java.nio.ByteBuffer;
-import java.nio.charset.StandardCharsets;
-import java.security.SecureRandom;
+import java.nio.file.Files;
+import java.nio.file.attribute.PosixFilePermission;
+import java.nio.file.attribute.PosixFilePermissions;
 import java.security.cert.Certificate;
 import java.security.cert.CertificateEncodingException;
 import java.text.DateFormat;
@@ -31,9 +23,6 @@ import java.text.SimpleDateFormat;
 import java.util.*;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
-import java.util.zip.*;
-
-import static com.sparrowwallet.drongo.crypto.Argon2KeyDeriver.SPRW1_PARAMETERS;

 public class Storage {
    private static final Logger log = LoggerFactory.getLogger(Storage.class);
@@ -47,224 +36,161 @@ public class Storage {
    public static final String WALLETS_DIR = "wallets";
    public static final String WALLETS_BACKUP_DIR = "backup";
    public static final String CERTS_DIR = "certs";
-    public static final String HEADER_MAGIC_1 = "SPRW1";
-    private static final int BINARY_HEADER_LENGTH = 28;
-    public static final String TEMP_BACKUP_EXTENSION = "tmp";
+    public static final String TEMP_BACKUP_PREFIX = "tmp";
+    public static final List<String> RESERVED_WALLET_NAMES = List.of("temp");

+    private Persistence persistence;
    private File walletFile;
-    private final Gson gson;
-    private AsymmetricKeyDeriver keyDeriver;
    private ECKey encryptionPubKey;

    public Storage(File walletFile) {
+        this(!walletFile.exists() || walletFile.getName().endsWith("." + PersistenceType.DB.getExtension()) ? PersistenceType.DB : PersistenceType.JSON, walletFile);
+    }
+
+    public Storage(PersistenceType persistenceType, File walletFile) {
+        this.persistence = persistenceType.getInstance();
+        this.walletFile = walletFile;
+    }
+
+    public Storage(Persistence persistence, File walletFile) {
+        this.persistence = persistence;
        this.walletFile = walletFile;
-        this.gson = getGson();
    }

    public File getWalletFile() {
        return walletFile;
    }

-    public static Gson getGson() {
-        return getGson(true);
+    public boolean isEncrypted() throws IOException {
+        return persistence.isEncrypted(walletFile);
    }

-    private static Gson getGson(boolean includeWalletSerializers) {
-        GsonBuilder gsonBuilder = new GsonBuilder();
-        gsonBuilder.registerTypeAdapter(ExtendedKey.class, new ExtendedPublicKeySerializer());
-        gsonBuilder.registerTypeAdapter(ExtendedKey.class, new ExtendedPublicKeyDeserializer());
-        gsonBuilder.registerTypeAdapter(byte[].class, new ByteArraySerializer());
-        gsonBuilder.registerTypeAdapter(byte[].class, new ByteArrayDeserializer());
-        gsonBuilder.registerTypeAdapter(Sha256Hash.class, new Sha256HashSerializer());
-        gsonBuilder.registerTypeAdapter(Sha256Hash.class, new Sha256HashDeserializer());
-        gsonBuilder.registerTypeAdapter(Date.class, new DateSerializer());
-        gsonBuilder.registerTypeAdapter(Date.class, new DateDeserializer());
-        gsonBuilder.registerTypeAdapter(Transaction.class, new TransactionSerializer());
-        gsonBuilder.registerTypeAdapter(Transaction.class, new TransactionDeserializer());
-        if(includeWalletSerializers) {
-            gsonBuilder.registerTypeAdapter(Keystore.class, new KeystoreSerializer());
-            gsonBuilder.registerTypeAdapter(WalletNode.class, new NodeSerializer());
-            gsonBuilder.registerTypeAdapter(WalletNode.class, new NodeDeserializer());
-        }
-
-        return gsonBuilder.setPrettyPrinting().disableHtmlEscaping().create();
+    public String getWalletId(Wallet wallet) {
+        return persistence.getWalletId(this, wallet);
    }

-    public WalletBackupAndKey loadWallet() throws IOException {
-        Wallet wallet = loadWallet(walletFile);
+    public String getWalletName(Wallet wallet) {
+        return persistence.getWalletName(walletFile, wallet);
+    }

-        Wallet backupWallet = null;
-        File[] backups = getBackups("json." + TEMP_BACKUP_EXTENSION);
-        if(backups.length > 0) {
-            try {
-                backupWallet = loadWallet(backups[0]);
-            } catch(Exception e) {
-                log.error("Error loading backup wallet " + TEMP_BACKUP_EXTENSION, e);
-            }
+    public String getWalletFileExtension() {
+        if(walletFile.getName().endsWith("." + getType().getExtension())) {
+            return getType().getExtension();
        }

+        return "";
+    }
+
+    public WalletBackupAndKey loadUnencryptedWallet() throws IOException, StorageException {
+        WalletBackupAndKey masterWalletAndKey = persistence.loadWallet(this);
        encryptionPubKey = NO_PASSWORD_KEY;
-        return new WalletBackupAndKey(wallet, backupWallet, null);
+        return migrateToDb(masterWalletAndKey);
    }

-    public Wallet loadWallet(File jsonFile) throws IOException {
-        Reader reader = new FileReader(jsonFile);
-        Wallet wallet = gson.fromJson(reader, Wallet.class);
-        reader.close();
-
-        return wallet;
+    public WalletBackupAndKey loadEncryptedWallet(CharSequence password) throws IOException, StorageException {
+        WalletBackupAndKey masterWalletAndKey = persistence.loadWallet(this, password);
+        encryptionPubKey = ECKey.fromPublicOnly(masterWalletAndKey.getEncryptionKey());
+        return migrateToDb(masterWalletAndKey);
    }

-    public WalletBackupAndKey loadWallet(CharSequence password) throws IOException, StorageException {
-        WalletAndKey walletAndKey = loadWallet(walletFile, password);
-
-        WalletAndKey backupAndKey = new WalletAndKey(null, null);
-        File[] backups = getBackups(TEMP_BACKUP_EXTENSION, "json." + TEMP_BACKUP_EXTENSION);
-        if(backups.length > 0) {
-            try {
-                backupAndKey = loadWallet(backups[0], password);
-            } catch(Exception e) {
-                log.error("Error loading backup wallet " + TEMP_BACKUP_EXTENSION, e);
-            }
+    public void saveWallet(Wallet wallet) throws IOException, StorageException {
+        File parent = walletFile.getParentFile();
+        if(!parent.exists() && !Storage.createOwnerOnlyDirectory(parent)) {
+            throw new IOException("Could not create folder " + parent);
        }

-        return new WalletBackupAndKey(walletAndKey.wallet, backupAndKey.wallet, walletAndKey.key);
-    }
-
-    public WalletAndKey loadWallet(File encryptedFile, CharSequence password) throws IOException, StorageException {
-        InputStream fileStream = new FileInputStream(encryptedFile);
-        ECKey encryptionKey = getEncryptionKey(password, fileStream);
-
-        InputStream inputStream = new InflaterInputStream(new ECIESInputStream(fileStream, encryptionKey, getEncryptionMagic()));
-        Reader reader = new InputStreamReader(inputStream, StandardCharsets.UTF_8);
-        Wallet wallet = gson.fromJson(reader, Wallet.class);
-        reader.close();
-
-        Key key = new Key(encryptionKey.getPrivKeyBytes(), keyDeriver.getSalt(), EncryptionType.Deriver.ARGON2);
-
-        encryptionPubKey = ECKey.fromPublicOnly(encryptionKey);
-        return new WalletAndKey(wallet, key);
-    }
-
-    public void storeWallet(Wallet wallet) throws IOException {
        if(encryptionPubKey != null && !NO_PASSWORD_KEY.equals(encryptionPubKey)) {
-            storeWallet(encryptionPubKey, wallet);
+            walletFile = persistence.storeWallet(this, wallet, encryptionPubKey);
            return;
        }

-        File parent = walletFile.getParentFile();
-        if(!parent.exists() && !parent.mkdirs()) {
-            throw new IOException("Could not create folder " + parent);
-        }
-
-        if(!walletFile.getName().endsWith(".json")) {
-            File jsonFile = new File(parent, walletFile.getName() + ".json");
-            if(walletFile.exists()) {
-                if(!walletFile.renameTo(jsonFile)) {
-                    throw new IOException("Could not rename " + walletFile.getName() + " to " + jsonFile.getName());
-                }
-            }
-            walletFile = jsonFile;
-        }
-
-        Writer writer = new FileWriter(walletFile);
-        gson.toJson(wallet, writer);
-        writer.close();
+        walletFile = persistence.storeWallet(this, wallet);
    }

-    private void storeWallet(ECKey encryptionPubKey, Wallet wallet) throws IOException {
-        File parent = walletFile.getParentFile();
-        if(!parent.exists() && !parent.mkdirs()) {
-            throw new IOException("Could not create folder " + parent);
+    public void updateWallet(Wallet wallet) throws IOException, StorageException {
+        if(encryptionPubKey != null && !NO_PASSWORD_KEY.equals(encryptionPubKey)) {
+            persistence.updateWallet(this, wallet, encryptionPubKey);
+        } else {
+            persistence.updateWallet(this, wallet);
        }
-
-        if(walletFile.getName().endsWith(".json")) {
-            File noJsonFile = new File(parent, walletFile.getName().substring(0, walletFile.getName().lastIndexOf('.')));
-            if(walletFile.exists()) {
-                if(!walletFile.renameTo(noJsonFile)) {
-                    throw new IOException("Could not rename " + walletFile.getName() + " to " + noJsonFile.getName());
-                }
-            }
-            walletFile = noJsonFile;
-        }
-
-        OutputStream outputStream = new FileOutputStream(walletFile);
-        writeBinaryHeader(outputStream);
-
-        OutputStreamWriter writer = new OutputStreamWriter(new DeflaterOutputStream(new ECIESOutputStream(outputStream, encryptionPubKey, getEncryptionMagic())), StandardCharsets.UTF_8);
-        gson.toJson(wallet, writer);
-        writer.close();
    }

-    private void writeBinaryHeader(OutputStream outputStream) throws IOException {
-        ByteBuffer buf = ByteBuffer.allocate(21);
-        buf.put(HEADER_MAGIC_1.getBytes(StandardCharsets.UTF_8));
-        buf.put(keyDeriver.getSalt());
-
-        byte[] encoded = Base64.getEncoder().encode(buf.array());
-        if(encoded.length != BINARY_HEADER_LENGTH) {
-            throw new IllegalStateException("Header length not " + BINARY_HEADER_LENGTH + " bytes");
-        }
-        outputStream.write(encoded);
+    public void close() {
+        ClosePersistenceService closePersistenceService = new ClosePersistenceService();
+        closePersistenceService.start();
    }

    public void backupWallet() throws IOException {
-        backupWallet(null);
+        if(walletFile.toPath().startsWith(getWalletsDir().toPath())) {
+            backupWallet(null);
+        }
    }

    public void backupTempWallet() {
        try {
-            backupWallet(TEMP_BACKUP_EXTENSION);
+            backupWallet(TEMP_BACKUP_PREFIX);
        } catch(IOException e) {
-            log.error("Error creating ." + TEMP_BACKUP_EXTENSION + " backup wallet", e);
+            log.error("Error creating " + TEMP_BACKUP_PREFIX + " backup wallet", e);
        }
    }

-    public void backupWallet(String extension) throws IOException {
+    private void backupWallet(String prefix) throws IOException {
        File backupDir = getWalletsBackupDir();

        Date backupDate = new Date();
-        String backupName = walletFile.getName();
+        String walletName = persistence.getWalletName(walletFile, null);
        String dateSuffix = "-" + BACKUP_DATE_FORMAT.format(backupDate);
-        int lastDot = backupName.lastIndexOf('.');
-        if(lastDot > 0) {
-            backupName = backupName.substring(0, lastDot) + dateSuffix + backupName.substring(lastDot);
-        } else {
-            backupName += dateSuffix;
-        }
+        String backupName = walletName + dateSuffix + walletFile.getName().substring(walletName.length());

-        if(extension != null) {
-            backupName += "." + extension;
+        if(prefix != null) {
+            backupName = prefix + "_" + backupName;
        }

        File backupFile = new File(backupDir, backupName);
-        Files.copy(walletFile, backupFile);
+        if(!backupFile.exists()) {
+            createOwnerOnlyFile(backupFile);
+        }
+
+        try(FileOutputStream outputStream = new FileOutputStream(backupFile)) {
+            copyWallet(outputStream);
+        }
+    }
+
+    public void copyWallet(OutputStream outputStream) throws IOException {
+        persistence.copyWallet(walletFile, outputStream);
    }

    public void deleteBackups() {
        deleteBackups(null);
    }

-    public void deleteBackups(String extension) {
-        File[] backups = getBackups(extension);
+    public void deleteTempBackups() {
+        deleteBackups(Storage.TEMP_BACKUP_PREFIX);
+    }
+
+    private void deleteBackups(String prefix) {
+        File[] backups = getBackups(prefix);
        for(File backup : backups) {
            backup.delete();
        }
    }

-    private File[] getBackups(String extension) {
-        return getBackups(extension, null);
+    public File getTempBackup() {
+        File[] backups = getBackups(TEMP_BACKUP_PREFIX);
+        return backups.length == 0 ? null : backups[0];
    }

-    private File[] getBackups(String extension, String notExtension) {
+    File[] getBackups(String prefix) {
        File backupDir = getWalletsBackupDir();
+        String walletName = persistence.getWalletName(walletFile, null);
+        String extension = walletFile.getName().substring(walletName.length());
        File[] backups = backupDir.listFiles((dir, name) -> {
-            return name.startsWith(Files.getNameWithoutExtension(walletFile.getName()) + "-") &&
+            return name.startsWith((prefix == null ? "" : prefix + "_") + walletName + "-") &&
                    getBackupDate(name) != null &&
-                    (extension == null || name.endsWith("." + extension)) &&
-                    (notExtension == null || !name.endsWith("." + notExtension));
+                    (extension.isEmpty() || name.endsWith(extension));
        });

+        backups = backups == null ? new File[0] : backups;
        Arrays.sort(backups, Comparator.comparing(o -> getBackupDate(((File)o).getName())).reversed());

        return backups;
@@ -279,6 +205,49 @@ public class Storage {
        return null;
    }

+    private WalletBackupAndKey migrateToDb(WalletBackupAndKey masterWalletAndKey) throws IOException, StorageException {
+        if(getType() == PersistenceType.JSON) {
+            log.info("Migrating " + masterWalletAndKey.getWallet().getName() + " from JSON to DB persistence");
+            masterWalletAndKey = migrateType(PersistenceType.DB, masterWalletAndKey.getWallet(), masterWalletAndKey.getEncryptionKey());
+        }
+
+        return masterWalletAndKey;
+    }
+
+    private WalletBackupAndKey migrateType(PersistenceType type, Wallet wallet, ECKey encryptionKey) throws IOException, StorageException {
+        File existingFile = walletFile;
+
+        try {
+            AsymmetricKeyDeriver keyDeriver = persistence.getKeyDeriver();
+            persistence = type.getInstance();
+            persistence.setKeyDeriver(keyDeriver);
+            walletFile = new File(walletFile.getParentFile(), wallet.getName() + "." + type.getExtension());
+            if(walletFile.exists()) {
+                walletFile.delete();
+            }
+
+            saveWallet(wallet);
+            if(type == PersistenceType.DB) {
+                for(Wallet childWallet : wallet.getChildWallets()) {
+                    saveWallet(childWallet);
+                }
+            }
+
+            if(NO_PASSWORD_KEY.equals(encryptionPubKey)) {
+                return persistence.loadWallet(this);
+            }
+
+            return persistence.loadWallet(this, null, encryptionKey);
+        } catch(Exception e) {
+            existingFile = null;
+            throw e;
+        } finally {
+            if(existingFile != null) {
+                existingFile.delete();
+            }
+        }
+    }
+
    public ECKey getEncryptionPubKey() {
        return encryptionPubKey;
    }
@@ -288,77 +257,48 @@ public class Storage {
    }

    public ECKey getEncryptionKey(CharSequence password) throws IOException, StorageException {
-        return getEncryptionKey(password, null);
-    }
-
-    private ECKey getEncryptionKey(CharSequence password, InputStream inputStream) throws IOException, StorageException {
-        if(password.equals("")) {
-            return NO_PASSWORD_KEY;
-        }
-
-        return getKeyDeriver(inputStream).deriveECKey(password);
+        return persistence.getEncryptionKey(password);
    }

    public AsymmetricKeyDeriver getKeyDeriver() {
-        return keyDeriver;
+        return persistence.getKeyDeriver();
    }

    void setKeyDeriver(AsymmetricKeyDeriver keyDeriver) {
-        this.keyDeriver = keyDeriver;
+        persistence.setKeyDeriver(keyDeriver);
    }

-    private AsymmetricKeyDeriver getKeyDeriver(InputStream inputStream) throws IOException, StorageException {
-        if(keyDeriver == null) {
-            byte[] salt = new byte[SPRW1_PARAMETERS.saltLength];
-
-            if(inputStream != null) {
-                byte[] header = new byte[BINARY_HEADER_LENGTH];
-                int read = inputStream.read(header);
-                if(read != BINARY_HEADER_LENGTH) {
-                    throw new StorageException("Not a Sparrow wallet - invalid header");
-                }
-                try {
-                    byte[] decodedHeader = Base64.getDecoder().decode(header);
-                    byte[] magic = Arrays.copyOfRange(decodedHeader, 0, HEADER_MAGIC_1.length());
-                    if(!HEADER_MAGIC_1.equals(new String(magic, StandardCharsets.UTF_8))) {
-                        throw new StorageException("Not a Sparrow wallet - invalid magic");
-                    }
-                    salt = Arrays.copyOfRange(decodedHeader, HEADER_MAGIC_1.length(), decodedHeader.length);
-                } catch(IllegalArgumentException e) {
-                    throw new StorageException("Not a Sparrow wallet - invalid header");
-                }
-            } else {
-                SecureRandom secureRandom = new SecureRandom();
-                secureRandom.nextBytes(salt);
-            }
-
-            keyDeriver = new Argon2KeyDeriver(salt);
-        } else if(inputStream != null) {
-            inputStream.skip(BINARY_HEADER_LENGTH);
-        }
-
-        return keyDeriver;
-    }
-
-    private static byte[] getEncryptionMagic() {
-        return "BIE1".getBytes(StandardCharsets.UTF_8);
+    public PersistenceType getType() {
+        return persistence.getType();
    }

    public static boolean walletExists(String walletName) {
        File encrypted = new File(getWalletsDir(), walletName.trim());
-        File unencrypted = new File(getWalletsDir(), walletName.trim() + ".json");
+        if(encrypted.exists()) {
+            return true;
+        }

-        return (encrypted.exists() || unencrypted.exists());
+        for(PersistenceType persistenceType : PersistenceType.values()) {
+            File unencrypted = new File(getWalletsDir(), walletName.trim() + "." + persistenceType.getExtension());
+            if(unencrypted.exists()) {
+                return true;
+            }
+        }
+
+        return RESERVED_WALLET_NAMES.contains(walletName);
    }

    public static File getExistingWallet(String walletName) {
-        File encrypted = new File(getWalletsDir(), walletName);
-        File unencrypted = new File(getWalletsDir(), walletName + ".json");
-
+        File encrypted = new File(getWalletsDir(), walletName.trim());
        if(encrypted.exists()) {
            return encrypted;
-        } else if(unencrypted.exists()) {
-            return unencrypted;
+        }
+
+        for(PersistenceType persistenceType : PersistenceType.values()) {
+            File unencrypted = new File(getWalletsDir(), walletName.trim() + "." + persistenceType.getExtension());
+            if(unencrypted.exists()) {
+                return unencrypted;
+            }
        }

        return null;
@@ -369,10 +309,42 @@ public class Storage {
        return new File(getWalletsDir(), walletName);
    }

+    public static boolean isWalletFile(File walletFile) {
+        for(PersistenceType type : PersistenceType.values()) {
+            if(walletFile.getName().endsWith("." + type.getExtension())) {
+                return true;
+            }
+
+            try {
+                if(type == PersistenceType.JSON && type.getInstance().isEncrypted(walletFile)) {
+                    return true;
+                }
+            } catch(IOException e) {
+                //ignore
+            }
+        }
+
+        return false;
+    }
+
+    public static boolean isEncrypted(File walletFile) {
+        try {
+            for(PersistenceType type : PersistenceType.values()) {
+                if(walletFile.getName().endsWith("." + type.getExtension())) {
+                    return type.getInstance().isEncrypted(walletFile);
+                }
+            }
+        } catch(IOException e) {
+            //ignore
+        }
+
+        return FileType.BINARY.equals(IOUtils.getFileType(walletFile));
+    }
+
    public static File getWalletsBackupDir() {
        File walletsBackupDir = new File(getWalletsDir(), WALLETS_BACKUP_DIR);
        if(!walletsBackupDir.exists()) {
-            walletsBackupDir.mkdirs();
+            createOwnerOnlyDirectory(walletsBackupDir);
        }

        return walletsBackupDir;
@@ -381,7 +353,7 @@ public class Storage {
    public static File getWalletsDir() {
        File walletsDir = new File(getSparrowDir(), WALLETS_DIR);
        if(!walletsDir.exists()) {
-            walletsDir.mkdirs();
+            createOwnerOnlyDirectory(walletsDir);
        }

        return walletsDir;
@@ -390,7 +362,7 @@ public class Storage {
    public static File getCertificateFile(String host) {
        File certsDir = getCertsDir();
        File[] certs = certsDir.listFiles((dir, name) -> name.equals(host));
-        if(certs.length > 0) {
+        if(certs != null && certs.length > 0) {
            return certs[0];
        }

@@ -412,18 +384,25 @@ public class Storage {
    static File getCertsDir() {
        File certsDir = new File(getSparrowDir(), CERTS_DIR);
        if(!certsDir.exists()) {
-            certsDir.mkdirs();
+            createOwnerOnlyDirectory(certsDir);
        }

        return certsDir;
    }

    static File getSparrowDir() {
+        File sparrowDir;
        if(Network.get() != Network.MAINNET) {
-            return new File(getSparrowHome(), Network.get().getName());
+            sparrowDir = new File(getSparrowHome(), Network.get().getName());
+        } else {
+            sparrowDir = getSparrowHome();
        }

-        return getSparrowHome();
+        if(!sparrowDir.exists()) {
+            createOwnerOnlyDirectory(sparrowDir);
+        }
+
+        return sparrowDir;
    }

    public static File getSparrowHome() {
@@ -446,160 +425,55 @@ public class Storage {
        return new File(System.getProperty("user.home"));
    }

-    private static class ExtendedPublicKeySerializer implements JsonSerializer<ExtendedKey> {
-        @Override
-        public JsonElement serialize(ExtendedKey src, Type typeOfSrc, JsonSerializationContext context) {
-            return new JsonPrimitive(src.toString());
-        }
-    }
-
-    private static class ExtendedPublicKeyDeserializer implements JsonDeserializer<ExtendedKey> {
-        @Override
-        public ExtendedKey deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {
-            return ExtendedKey.fromDescriptor(json.getAsJsonPrimitive().getAsString());
-        }
-    }
-
-    private static class ByteArraySerializer implements JsonSerializer<byte[]> {
-        @Override
-        public JsonElement serialize(byte[] src, Type typeOfSrc, JsonSerializationContext context) {
-            return new JsonPrimitive(Utils.bytesToHex(src));
-        }
-    }
-
-    private static class ByteArrayDeserializer implements JsonDeserializer<byte[]> {
-        @Override
-        public byte[] deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {
-            return Utils.hexToBytes(json.getAsJsonPrimitive().getAsString());
-        }
-    }
-
-    private static class Sha256HashSerializer implements JsonSerializer<Sha256Hash> {
-        @Override
-        public JsonElement serialize(Sha256Hash src, Type typeOfSrc, JsonSerializationContext context) {
-            return new JsonPrimitive(src.toString());
-        }
-    }
-
-    private static class Sha256HashDeserializer implements JsonDeserializer<Sha256Hash> {
-        @Override
-        public Sha256Hash deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {
-            return Sha256Hash.wrap(json.getAsJsonPrimitive().getAsString());
-        }
-    }
-
-    private static class DateSerializer implements JsonSerializer<Date> {
-        @Override
-        public JsonElement serialize(Date src, Type typeOfSrc, JsonSerializationContext context) {
-            return new JsonPrimitive(src.getTime());
-        }
-    }
-
-    private static class DateDeserializer implements JsonDeserializer<Date> {
-        @Override
-        public Date deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {
-            return new Date(json.getAsJsonPrimitive().getAsLong());
-        }
-    }
-
-    private static class TransactionSerializer implements JsonSerializer<Transaction> {
-        @Override
-        public JsonElement serialize(Transaction src, Type typeOfSrc, JsonSerializationContext context) {
-            try {
-                ByteArrayOutputStream baos = new ByteArrayOutputStream();
-                src.bitcoinSerializeToStream(baos);
-                return new JsonPrimitive(Utils.bytesToHex(baos.toByteArray()));
-            } catch (IOException e) {
-                throw new IllegalStateException(e);
-            }
-        }
-    }
-
-    private static class TransactionDeserializer implements JsonDeserializer<Transaction> {
-        @Override
-        public Transaction deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {
-            byte[] rawTx = Utils.hexToBytes(json.getAsJsonPrimitive().getAsString());
-            return new Transaction(rawTx);
-        }
-    }
-
-    private static class KeystoreSerializer implements JsonSerializer<Keystore> {
-        @Override
-        public JsonElement serialize(Keystore keystore, Type typeOfSrc, JsonSerializationContext context) {
-            JsonObject jsonObject = (JsonObject)getGson(false).toJsonTree(keystore);
-            if(keystore.hasPrivateKey()) {
-                jsonObject.remove("extendedPublicKey");
-                jsonObject.getAsJsonObject("keyDerivation").remove("masterFingerprint");
+    public static boolean createOwnerOnlyDirectory(File directory) {
+        try {
+            if(Platform.getCurrent() == Platform.WINDOWS) {
+                Files.createDirectories(directory.toPath());
+                return true;
            }

-            return jsonObject;
+            Files.createDirectories(directory.toPath(), PosixFilePermissions.asFileAttribute(getDirectoryOwnerOnlyPosixFilePermissions()));
+            return true;
+        } catch(UnsupportedOperationException e) {
+            return directory.mkdirs();
+        } catch(IOException e) {
+            log.error("Could not create directory " + directory.getAbsolutePath(), e);
        }
+
+        return false;
    }

-    private static class NodeSerializer implements JsonSerializer<WalletNode> {
-        @Override
-        public JsonElement serialize(WalletNode node, Type typeOfSrc, JsonSerializationContext context) {
-            JsonObject jsonObject = (JsonObject)getGson(false).toJsonTree(node);
-
-            JsonArray children = jsonObject.getAsJsonArray("children");
-            Iterator<JsonElement> iter = children.iterator();
-            while(iter.hasNext()) {
-                JsonObject childObject = (JsonObject)iter.next();
-                removeEmptyCollection(childObject, "children");
-                removeEmptyCollection(childObject, "transactionOutputs");
-
-                if(childObject.get("label") == null && childObject.get("children") == null && childObject.get("transactionOutputs") == null) {
-                    iter.remove();
-                }
+    public static boolean createOwnerOnlyFile(File file) {
+        try {
+            if(Platform.getCurrent() == Platform.WINDOWS) {
+                Files.createFile(file.toPath());
+                return true;
            }

-            return jsonObject;
+            Files.createFile(file.toPath(), PosixFilePermissions.asFileAttribute(getFileOwnerOnlyPosixFilePermissions()));
+            return true;
+        } catch(UnsupportedOperationException e) {
+            return false;
+        } catch(IOException e) {
+            log.error("Could not create file " + file.getAbsolutePath(), e);
        }

-        private void removeEmptyCollection(JsonObject jsonObject, String memberName) {
-            if(jsonObject.get(memberName) != null && jsonObject.getAsJsonArray(memberName).size() == 0) {
-                jsonObject.remove(memberName);
-            }
-        }
+        return false;
    }

-    private static class NodeDeserializer implements JsonDeserializer<WalletNode> {
-        @Override
-        public WalletNode deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {
-            WalletNode node = getGson(false).fromJson(json, typeOfT);
-            node.parseDerivation();
+    private static Set<PosixFilePermission> getDirectoryOwnerOnlyPosixFilePermissions() {
+        Set<PosixFilePermission> ownerOnly = getFileOwnerOnlyPosixFilePermissions();
+        ownerOnly.add(PosixFilePermission.OWNER_EXECUTE);

-            for(WalletNode childNode : node.getChildren()) {
-                childNode.parseDerivation();
-                if(childNode.getChildren() == null) {
-                    childNode.setChildren(new TreeSet<>());
-                }
-                if(childNode.getTransactionOutputs() == null) {
-                    childNode.setTransactionOutputs(new TreeSet<>());
-                }
-            }
-
-            return node;
-        }
+        return ownerOnly;
    }

-    public static class WalletAndKey {
-        public final Wallet wallet;
-        public final Key key;
+    private static Set<PosixFilePermission> getFileOwnerOnlyPosixFilePermissions() {
+        Set<PosixFilePermission> ownerOnly = EnumSet.noneOf(PosixFilePermission.class);
+        ownerOnly.add(PosixFilePermission.OWNER_READ);
+        ownerOnly.add(PosixFilePermission.OWNER_WRITE);

-        public WalletAndKey(Wallet wallet, Key key) {
-            this.wallet = wallet;
-            this.key = key;
-        }
-    }
-
-    public static class WalletBackupAndKey extends WalletAndKey {
-        public final Wallet backupWallet;
-
-        public WalletBackupAndKey(Wallet wallet, Wallet backupWallet, Key key) {
-            super(wallet, key);
-            this.backupWallet = backupWallet;
-        }
+        return ownerOnly;
    }

    public static class LoadWalletService extends Service<WalletBackupAndKey> {
@@ -615,7 +489,7 @@ public class Storage {
        protected Task<WalletBackupAndKey> createTask() {
            return new Task<>() {
                protected WalletBackupAndKey call() throws IOException, StorageException {
-                    WalletBackupAndKey walletBackupAndKey = storage.loadWallet(password);
+                    WalletBackupAndKey walletBackupAndKey = storage.loadEncryptedWallet(password);
                    password.clear();
                    return walletBackupAndKey;
                }
@@ -669,4 +543,16 @@ public class Storage {
            };
        }
    }
+
+    public class ClosePersistenceService extends Service<Void> {
+        @Override
+        protected Task<Void> createTask() {
+            return new Task<>() {
+                protected Void call() {
+                    persistence.close();
+                    return null;
+                }
+            };
+        }
+    }
 }
@@ -0,0 +1,51 @@
+package com.sparrowwallet.sparrow.io;
+
+import com.sparrowwallet.drongo.crypto.*;
+import com.sparrowwallet.drongo.wallet.Wallet;
+
+import java.util.Map;
+
+public class WalletBackupAndKey {
+    private final Wallet wallet;
+    private final Wallet backupWallet;
+    private final ECKey encryptionKey;
+    private final Key key;
+    private final Map<Storage, WalletBackupAndKey> childWallets;
+
+    public WalletBackupAndKey(Wallet wallet, Wallet backupWallet, ECKey encryptionKey, AsymmetricKeyDeriver keyDeriver, Map<Storage, WalletBackupAndKey> childWallets) {
+        this.wallet = wallet;
+        this.backupWallet = backupWallet;
+        this.encryptionKey = encryptionKey;
+        this.key = encryptionKey == null ? null : new Key(encryptionKey.getPrivKeyBytes(), keyDeriver.getSalt(), EncryptionType.Deriver.ARGON2);
+        this.childWallets = childWallets;
+    }
+
+    public Wallet getWallet() {
+        return wallet;
+    }
+
+    public Wallet getBackupWallet() {
+        return backupWallet;
+    }
+
+    public ECKey getEncryptionKey() {
+        return encryptionKey;
+    }
+
+    public Key getKey() {
+        return key;
+    }
+
+    public Map<Storage, WalletBackupAndKey> getChildWallets() {
+        return childWallets;
+    }
+
+    public void clear() {
+        if(encryptionKey != null) {
+            encryptionKey.clear();
+        }
+        if(key != null) {
+            key.clear();
+        }
+    }
+}
@@ -0,0 +1,60 @@
+package com.sparrowwallet.sparrow.io.db;
+
+import com.sparrowwallet.drongo.protocol.Sha256Hash;
+import com.sparrowwallet.drongo.wallet.BlockTransaction;
+import com.sparrowwallet.drongo.wallet.Wallet;
+import org.jdbi.v3.sqlobject.config.RegisterRowMapper;
+import org.jdbi.v3.sqlobject.customizer.Bind;
+import org.jdbi.v3.sqlobject.statement.GetGeneratedKeys;
+import org.jdbi.v3.sqlobject.statement.SqlQuery;
+import org.jdbi.v3.sqlobject.statement.SqlUpdate;
+
+import java.util.Date;
+import java.util.Map;
+
+public interface BlockTransactionDao {
+    @SqlQuery("select id, txid, hash, height, date, fee, label, transaction, blockHash from blockTransaction where wallet = ? order by id")
+    @RegisterRowMapper(BlockTransactionMapper.class)
+    Map<Sha256Hash, BlockTransaction> getForWalletId(Long id);
+
+    @SqlQuery("select id, txid, hash, height, date, fee, label, transaction, blockHash from blockTransaction where txid = ?")
+    @RegisterRowMapper(BlockTransactionMapper.class)
+    Map<Sha256Hash, BlockTransaction> getForTxId(byte[] id);
+
+    @SqlUpdate("insert into blockTransaction (txid, hash, height, date, fee, label, transaction, blockHash, wallet) values (?, ?, ?, ?, ?, ?, ?, ?, ?)")
+    @GetGeneratedKeys("id")
+    long insertBlockTransaction(byte[] txid, byte[] hash, int height, Date date, Long fee, String label, byte[] transaction, byte[] blockHash, long wallet);
+
+    @SqlUpdate("update blockTransaction set txid = ?, hash = ?, height = ?, date = ?, fee = ?, label = ?, transaction = ?, blockHash = ?, wallet = ? where id = ?")
+    void updateBlockTransaction(byte[] txid, byte[] hash, int height, Date date, Long fee, String label, byte[] transaction, byte[] blockHash, long wallet, long id);
+
+    @SqlUpdate("update blockTransaction set label = :label where id = :id")
+    void updateLabel(@Bind("id") long id, @Bind("label") String label);
+
+    @SqlUpdate("delete from blockTransaction where wallet = ?")
+    void clear(long wallet);
+
+    default void addBlockTransactions(Wallet wallet) {
+        for(Map.Entry<Sha256Hash, BlockTransaction> blkTxEntry : wallet.getTransactions().entrySet()) {
+            blkTxEntry.getValue().setId(null);
+            addOrUpdate(wallet, blkTxEntry.getKey(), blkTxEntry.getValue());
+        }
+    }
+
+    default void addOrUpdate(Wallet wallet, Sha256Hash txid, BlockTransaction blkTx) {
+        Map<Sha256Hash, BlockTransaction> existing = getForTxId(txid.getBytes());
+
+        if(existing.isEmpty() && blkTx.getId() == null) {
+            long id = insertBlockTransaction(txid.getBytes(), blkTx.getHash().getBytes(), blkTx.getHeight(), blkTx.getDate(), blkTx.getFee(), blkTx.getLabel(),
+                    blkTx.getTransaction() == null ? null : blkTx.getTransaction().bitcoinSerialize(),
+                    blkTx.getBlockHash() == null ? null : blkTx.getBlockHash().getBytes(), wallet.getId());
+            blkTx.setId(id);
+        } else {
+            Long existingId = existing.get(txid) != null ? existing.get(txid).getId() : blkTx.getId();
+            updateBlockTransaction(txid.getBytes(), blkTx.getHash().getBytes(), blkTx.getHeight(), blkTx.getDate(), blkTx.getFee(), blkTx.getLabel(),
+                    blkTx.getTransaction() == null ? null : blkTx.getTransaction().bitcoinSerialize(),
+                    blkTx.getBlockHash() == null ? null : blkTx.getBlockHash().getBytes(), wallet.getId(), existingId);
+            blkTx.setId(existingId);
+        }
+    }
+}
@@ -0,0 +1,26 @@
+package com.sparrowwallet.sparrow.io.db;
+
+import com.sparrowwallet.drongo.protocol.Sha256Hash;
+import com.sparrowwallet.drongo.wallet.BlockTransactionHashIndex;
+import com.sparrowwallet.drongo.wallet.Status;
+import org.jdbi.v3.core.mapper.RowMapper;
+import org.jdbi.v3.core.statement.StatementContext;
+
+import java.sql.ResultSet;
+import java.sql.SQLException;
+
+public class BlockTransactionHashIndexMapper implements RowMapper<BlockTransactionHashIndex> {
+    @Override
+    public BlockTransactionHashIndex map(ResultSet rs, StatementContext ctx) throws SQLException {
+        BlockTransactionHashIndex blockTransactionHashIndex = new BlockTransactionHashIndex(Sha256Hash.wrap(rs.getBytes("blockTransactionHashIndex.hash")),
+                rs.getInt("blockTransactionHashIndex.height"), rs.getTimestamp("blockTransactionHashIndex.date"), rs.getLong("blockTransactionHashIndex.fee"),
+                rs.getLong("blockTransactionHashIndex.index"), rs.getLong("blockTransactionHashIndex.outputValue"), null, rs.getString("blockTransactionHashIndex.label"));
+        blockTransactionHashIndex.setId(rs.getLong("blockTransactionHashIndex.id"));
+        int statusIndex = rs.getInt("blockTransactionHashIndex.status");
+        if(!rs.wasNull()) {
+            blockTransactionHashIndex.setStatus(Status.values()[statusIndex]);
+        }
+
+        return blockTransactionHashIndex;
+    }
+}
@@ -0,0 +1,51 @@
+package com.sparrowwallet.sparrow.io.db;
+
+import com.sparrowwallet.drongo.protocol.Sha256Hash;
+import com.sparrowwallet.drongo.protocol.Transaction;
+import com.sparrowwallet.drongo.wallet.BlockTransaction;
+import org.jdbi.v3.core.mapper.RowMapper;
+import org.jdbi.v3.core.statement.StatementContext;
+
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.Map;
+
+public class BlockTransactionMapper implements RowMapper<Map.Entry<Sha256Hash, BlockTransaction>> {
+
+    @Override
+    public Map.Entry<Sha256Hash, BlockTransaction> map(ResultSet rs, StatementContext ctx) throws SQLException {
+        Sha256Hash txid = Sha256Hash.wrap(rs.getBytes("txid"));
+
+        byte[] txBytes = rs.getBytes("transaction");
+        Transaction transaction = null;
+        if(txBytes != null) {
+            transaction = new Transaction(txBytes);
+        }
+
+        Long fee = rs.getLong("fee");
+        if(rs.wasNull()) {
+            fee = null;
+        }
+
+        BlockTransaction blockTransaction = new BlockTransaction(Sha256Hash.wrap(rs.getBytes("hash")), rs.getInt("height"), rs.getTimestamp("date"),
+                fee, transaction, rs.getBytes("blockHash") == null ? null : Sha256Hash.wrap(rs.getBytes("blockHash")), rs.getString("label"));
+        blockTransaction.setId(rs.getLong("id"));
+
+        return new Map.Entry<>() {
+            @Override
+            public Sha256Hash getKey() {
+                return txid;
+            }
+
+            @Override
+            public BlockTransaction getValue() {
+                return blockTransaction;
+            }
+
+            @Override
+            public BlockTransaction setValue(BlockTransaction value) {
+                return null;
+            }
+        };
+    }
+}
@@ -0,0 +1,653 @@
+package com.sparrowwallet.sparrow.io.db;
+
+import com.google.common.eventbus.Subscribe;
+import com.google.common.io.Files;
+import com.sparrowwallet.drongo.Utils;
+import com.sparrowwallet.drongo.crypto.Argon2KeyDeriver;
+import com.sparrowwallet.drongo.crypto.AsymmetricKeyDeriver;
+import com.sparrowwallet.drongo.crypto.ECKey;
+import com.sparrowwallet.drongo.crypto.InvalidPasswordException;
+import com.sparrowwallet.drongo.protocol.Sha256Hash;
+import com.sparrowwallet.drongo.wallet.*;
+import com.sparrowwallet.sparrow.EventManager;
+import com.sparrowwallet.sparrow.event.*;
+import com.sparrowwallet.sparrow.io.*;
+import com.sparrowwallet.sparrow.wallet.*;
+import com.zaxxer.hikari.HikariConfig;
+import com.zaxxer.hikari.HikariDataSource;
+import com.zaxxer.hikari.pool.HikariPool;
+import org.flywaydb.core.Flyway;
+import org.flywaydb.core.api.FlywayException;
+import org.flywaydb.core.api.exception.FlywayValidateException;
+import org.h2.tools.ChangeFileEncryption;
+import org.jdbi.v3.core.Jdbi;
+import org.jdbi.v3.core.h2.H2DatabasePlugin;
+import org.jdbi.v3.sqlobject.SqlObjectPlugin;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.*;
+import java.nio.ByteBuffer;
+import java.nio.channels.FileChannel;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.StandardCopyOption;
+import java.security.SecureRandom;
+import java.util.*;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
+public class DbPersistence implements Persistence {
+    private static final Logger log = LoggerFactory.getLogger(DbPersistence.class);
+
+    static final String DEFAULT_SCHEMA = "PUBLIC";
+    private static final String WALLET_SCHEMA_PREFIX = "wallet_";
+    private static final String MASTER_SCHEMA = WALLET_SCHEMA_PREFIX + "master";
+    private static final byte[] H2_ENCRYPT_HEADER = "H2encrypt\n".getBytes(StandardCharsets.UTF_8);
+    private static final int H2_ENCRYPT_SALT_LENGTH_BYTES = 8;
+    private static final int SALT_LENGTH_BYTES = 16;
+    public static final byte[] HEADER_MAGIC_1 = "SPRW1\n".getBytes(StandardCharsets.UTF_8);
+    private static final String H2_USER = "sa";
+    private static final String H2_PASSWORD = "";
+    public static final String MIGRATION_RESOURCES_DIR = "com/sparrowwallet/sparrow/sql/";
+
+    private HikariDataSource dataSource;
+    private AsymmetricKeyDeriver keyDeriver;
+
+    private Wallet masterWallet;
+    private final Map<Wallet, DirtyPersistables> dirtyPersistablesMap = new HashMap<>();
+
+    public DbPersistence() {
+        EventManager.get().register(this);
+    }
+
+    @Override
+    public WalletBackupAndKey loadWallet(Storage storage) throws IOException, StorageException {
+        return loadWallet(storage, null, null);
+    }
+
+    @Override
+    public WalletBackupAndKey loadWallet(Storage storage, CharSequence password) throws IOException, StorageException {
+        return loadWallet(storage, password, null);
+    }
+
+    @Override
+    public WalletBackupAndKey loadWallet(Storage storage, CharSequence password, ECKey alreadyDerivedKey) throws IOException, StorageException {
+        ECKey encryptionKey = getEncryptionKey(password, storage.getWalletFile(), alreadyDerivedKey);
+
+        migrate(storage, MASTER_SCHEMA, encryptionKey);
+
+        Jdbi jdbi = getJdbi(storage, getFilePassword(encryptionKey));
+        masterWallet = jdbi.withHandle(handle -> {
+            WalletDao walletDao = handle.attach(WalletDao.class);
+            return walletDao.getMainWallet(MASTER_SCHEMA);
+        });
+
+        File backupFile = storage.getTempBackup();
+        Wallet backupWallet = null;
+        if(backupFile != null) {
+            Persistence backupPersistence = PersistenceType.DB.getInstance();
+            backupPersistence.setKeyDeriver(keyDeriver);
+            backupWallet = backupPersistence.loadWallet(new Storage(backupPersistence, backupFile), password, encryptionKey).getWallet();
+        }
+
+        Map<Storage, WalletBackupAndKey> childWallets = loadChildWallets(storage, masterWallet, backupWallet, encryptionKey);
+        masterWallet.setChildWallets(childWallets.values().stream().map(WalletBackupAndKey::getWallet).collect(Collectors.toList()));
+
+        return new WalletBackupAndKey(masterWallet, backupWallet, encryptionKey, keyDeriver, childWallets);
+    }
+
+    private Map<Storage, WalletBackupAndKey> loadChildWallets(Storage storage, Wallet masterWallet, Wallet backupWallet, ECKey encryptionKey) throws StorageException {
+        Jdbi jdbi = getJdbi(storage, getFilePassword(encryptionKey));
+        List<String> schemas = jdbi.withHandle(handle -> {
+           return handle.createQuery("show schemas").mapTo(String.class).list();
+        });
+
+        List<String> childSchemas = schemas.stream().filter(schema -> schema.startsWith(WALLET_SCHEMA_PREFIX) && !schema.equals(MASTER_SCHEMA)).collect(Collectors.toList());
+        Map<Storage, WalletBackupAndKey> childWallets = new LinkedHashMap<>();
+        for(String schema : childSchemas) {
+            migrate(storage, schema, encryptionKey);
+
+            Jdbi childJdbi = getJdbi(storage, getFilePassword(encryptionKey));
+            Wallet wallet = childJdbi.withHandle(handle -> {
+                WalletDao walletDao = handle.attach(WalletDao.class);
+                Wallet childWallet = walletDao.getMainWallet(schema);
+                childWallet.setName(schema.substring(WALLET_SCHEMA_PREFIX.length()));
+                childWallet.setMasterWallet(masterWallet);
+                return childWallet;
+            });
+            Wallet backupChildWallet = backupWallet == null ? null : backupWallet.getChildWallets().stream().filter(child -> wallet.getName().equals(child.getName())).findFirst().orElse(null);
+            childWallets.put(storage, new WalletBackupAndKey(wallet, backupChildWallet, encryptionKey, keyDeriver, Collections.emptyMap()));
+        }
+
+        return childWallets;
+    }
+
+    @Override
+    public File storeWallet(Storage storage, Wallet wallet) throws IOException, StorageException {
+        File walletFile = storage.getWalletFile();
+        walletFile = renameToDbFile(walletFile);
+
+        updatePassword(storage, null);
+        cleanAndAddWallet(storage, wallet, null);
+
+        return walletFile;
+    }
+
+    @Override
+    public File storeWallet(Storage storage, Wallet wallet, ECKey encryptionPubKey) throws IOException, StorageException {
+        File walletFile = storage.getWalletFile();
+        walletFile = renameToDbFile(walletFile);
+
+        boolean existing = walletFile.exists();
+        updatePassword(storage, encryptionPubKey);
+        cleanAndAddWallet(storage, wallet, getFilePassword(encryptionPubKey));
+        if(!existing) {
+            writeBinaryHeader(walletFile);
+        }
+
+        return walletFile;
+    }
+
+    @Override
+    public void updateWallet(Storage storage, Wallet wallet) throws StorageException {
+        updateWallet(storage, wallet, null);
+    }
+
+    @Override
+    public void updateWallet(Storage storage, Wallet wallet, ECKey encryptionPubKey) throws StorageException {
+        updatePassword(storage, encryptionPubKey);
+        update(storage, wallet, getFilePassword(encryptionPubKey));
+    }
+
+    private File renameToDbFile(File walletFile) throws IOException {
+        if(!walletFile.getName().endsWith("." + getType().getExtension())) {
+            File dbFile = new File(walletFile.getParentFile(), walletFile.getName() + "." + getType().getExtension());
+            if(walletFile.exists()) {
+                if(!walletFile.renameTo(dbFile)) {
+                    throw new IOException("Could not rename " + walletFile.getName() + " to " + dbFile.getName());
+                }
+            }
+
+            return dbFile;
+        }
+
+        return walletFile;
+    }
+
+    private void update(Storage storage, Wallet wallet, String password) throws StorageException {
+        DirtyPersistables dirtyPersistables = dirtyPersistablesMap.get(wallet);
+        if(dirtyPersistables == null) {
+            return;
+        }
+
+        log.debug("Updating " + wallet.getName() + " on " + Thread.currentThread().getName());
+        log.debug(dirtyPersistables.toString());
+
+        Jdbi jdbi = getJdbi(storage, password);
+        jdbi.useHandle(handle -> {
+            WalletDao walletDao = handle.attach(WalletDao.class);
+            try {
+                walletDao.setSchema(getSchema(wallet));
+
+                if(dirtyPersistables.clearHistory) {
+                    WalletNodeDao walletNodeDao = handle.attach(WalletNodeDao.class);
+                    BlockTransactionDao blockTransactionDao = handle.attach(BlockTransactionDao.class);
+                    walletNodeDao.clearHistory(wallet);
+                    blockTransactionDao.clear(wallet.getId());
+                }
+
+                if(!dirtyPersistables.historyNodes.isEmpty()) {
+                    WalletNodeDao walletNodeDao = handle.attach(WalletNodeDao.class);
+                    BlockTransactionDao blockTransactionDao = handle.attach(BlockTransactionDao.class);
+                    Set<Sha256Hash> referencedTxIds = new HashSet<>();
+                    for(WalletNode addressNode : dirtyPersistables.historyNodes) {
+                        if(addressNode.getId() == null) {
+                            WalletNode purposeNode = wallet.getNode(addressNode.getKeyPurpose());
+                            if(purposeNode.getId() == null) {
+                                long purposeNodeId = walletNodeDao.insertWalletNode(purposeNode.getDerivationPath(), purposeNode.getLabel(), wallet.getId(), null);
+                                purposeNode.setId(purposeNodeId);
+                            }
+
+                            long nodeId = walletNodeDao.insertWalletNode(addressNode.getDerivationPath(), addressNode.getLabel(), wallet.getId(), purposeNode.getId());
+                            addressNode.setId(nodeId);
+                        }
+
+                        Set<BlockTransactionHashIndex> txos = addressNode.getTransactionOutputs().stream().flatMap(txo -> txo.isSpent() ? Stream.of(txo, txo.getSpentBy()) : Stream.of(txo)).collect(Collectors.toSet());
+                        List<Long> existingIds = txos.stream().map(Persistable::getId).filter(Objects::nonNull).collect(Collectors.toList());
+                        referencedTxIds.addAll(txos.stream().map(BlockTransactionHash::getHash).collect(Collectors.toSet()));
+
+                        walletNodeDao.deleteNodeTxosNotInList(addressNode, existingIds.isEmpty() ? List.of(-1L) : existingIds);
+                        for(BlockTransactionHashIndex txo : addressNode.getTransactionOutputs()) {
+                            walletNodeDao.addOrUpdate(addressNode, txo);
+                        }
+                    }
+                    for(Sha256Hash txid : referencedTxIds) {
+                        BlockTransaction blkTx = wallet.getTransactions().get(txid);
+                        blockTransactionDao.addOrUpdate(wallet, txid, blkTx);
+                    }
+                }
+
+                if(dirtyPersistables.blockHeight != null) {
+                    walletDao.updateStoredBlockHeight(wallet.getId(), dirtyPersistables.blockHeight);
+                }
+
+                if(!dirtyPersistables.labelEntries.isEmpty()) {
+                    BlockTransactionDao blockTransactionDao = handle.attach(BlockTransactionDao.class);
+                    WalletNodeDao walletNodeDao = handle.attach(WalletNodeDao.class);
+                    for(Entry entry : dirtyPersistables.labelEntries) {
+                        if(entry instanceof TransactionEntry && ((TransactionEntry)entry).getBlockTransaction().getId() != null) {
+                            blockTransactionDao.updateLabel(((TransactionEntry)entry).getBlockTransaction().getId(), entry.getLabel());
+                        } else if(entry instanceof NodeEntry && ((NodeEntry)entry).getNode().getId() != null) {
+                            walletNodeDao.updateNodeLabel(((NodeEntry)entry).getNode().getId(), entry.getLabel());
+                        } else if(entry instanceof HashIndexEntry && ((HashIndexEntry)entry).getHashIndex().getId() != null) {
+                            walletNodeDao.updateTxoLabel(((HashIndexEntry)entry).getHashIndex().getId(), entry.getLabel());
+                        }
+                    }
+                }
+
+                if(!dirtyPersistables.utxoStatuses.isEmpty()) {
+                    WalletNodeDao walletNodeDao = handle.attach(WalletNodeDao.class);
+                    for(BlockTransactionHashIndex utxo : dirtyPersistables.utxoStatuses) {
+                        walletNodeDao.updateTxoStatus(utxo.getId(), utxo.getStatus() == null ? null : utxo.getStatus().ordinal());
+                    }
+                }
+
+                if(!dirtyPersistables.labelKeystores.isEmpty()) {
+                    KeystoreDao keystoreDao = handle.attach(KeystoreDao.class);
+                    for(Keystore keystore : dirtyPersistables.labelKeystores) {
+                        keystoreDao.updateLabel(keystore.getLabel(), keystore.getId());
+                    }
+                }
+
+                if(!dirtyPersistables.encryptionKeystores.isEmpty()) {
+                    KeystoreDao keystoreDao = handle.attach(KeystoreDao.class);
+                    for(Keystore keystore : dirtyPersistables.encryptionKeystores) {
+                        keystoreDao.updateKeystoreEncryption(keystore);
+                    }
+                }
+
+                dirtyPersistablesMap.remove(wallet);
+            } finally {
+                walletDao.setSchema(DEFAULT_SCHEMA);
+            }
+        });
+    }
+
+    private void cleanAndAddWallet(Storage storage, Wallet wallet, String password) throws StorageException {
+        String schema = getSchema(wallet);
+        cleanAndMigrate(storage, schema, password);
+
+        Jdbi jdbi = getJdbi(storage, password);
+        jdbi.useHandle(handle -> {
+            WalletDao walletDao = handle.attach(WalletDao.class);
+            walletDao.addWallet(schema, wallet);
+        });
+
+        if(wallet.isMasterWallet()) {
+            masterWallet = wallet;
+        }
+    }
+
+    private void migrate(Storage storage, String schema, ECKey encryptionKey) throws StorageException {
+        File migrationDir = getMigrationDir();
+        try {
+            Flyway flyway = getFlyway(storage, schema, getFilePassword(encryptionKey), migrationDir);
+            flyway.migrate();
+        } catch(FlywayValidateException e) {
+            log.error("Failed to open wallet file. Validation error during schema migration.", e);
+            throw new StorageException("Failed to open wallet file. Validation error during schema migration.", e);
+        } catch(FlywayException e) {
+            log.error("Failed to open wallet file. ", e);
+            throw new StorageException("Failed to open wallet file.\n" + e.getMessage(), e);
+        } finally {
+            IOUtils.deleteDirectory(migrationDir);
+        }
+    }
+
+    private void cleanAndMigrate(Storage storage, String schema, String password) throws StorageException {
+        File migrationDir = getMigrationDir();
+        try {
+            Flyway flyway = getFlyway(storage, schema, password, migrationDir);
+            flyway.clean();
+            flyway.migrate();
+        } catch(FlywayException e) {
+            log.error("Failed to save wallet file.", e);
+            throw new StorageException("Failed to save wallet file.\n" + e.getMessage(), e);
+        } finally {
+            IOUtils.deleteDirectory(migrationDir);
+        }
+    }
+
+    private String getSchema(Wallet wallet) {
+        return wallet.isMasterWallet() ? MASTER_SCHEMA : WALLET_SCHEMA_PREFIX + wallet.getName();
+    }
+
+    private String getFilePassword(ECKey encryptionKey) {
+        if(encryptionKey == null) {
+            return null;
+        }
+
+        return Utils.bytesToHex(encryptionKey.getPubKey());
+    }
+
+    private void writeBinaryHeader(File walletFile) throws IOException {
+        if(dataSource != null && !dataSource.isClosed()) {
+            dataSource.close();
+        }
+
+        ByteBuffer header = ByteBuffer.allocate(HEADER_MAGIC_1.length + SALT_LENGTH_BYTES);
+        header.put(HEADER_MAGIC_1);
+        header.put(keyDeriver.getSalt());
+        header.flip();
+
+        try(FileChannel fileChannel = new RandomAccessFile(walletFile, "rwd").getChannel()) {
+            fileChannel.position(H2_ENCRYPT_HEADER.length + H2_ENCRYPT_SALT_LENGTH_BYTES);
+            fileChannel.write(header);
+        }
+    }
+
+    private void updatePassword(Storage storage, ECKey encryptionPubKey) {
+        String newPassword = getFilePassword(encryptionPubKey);
+        String currentPassword = getDatasourcePassword();
+
+        //The password only needs to be changed if the datasource is not null - if we have not loaded the wallet from a datasource, it is a new wallet and the database is still to be created
+        if(dataSource != null && !Objects.equals(currentPassword, newPassword)) {
+            if(!dataSource.isClosed()) {
+                dataSource.close();
+            }
+
+            try {
+                File walletFile = storage.getWalletFile();
+                ChangeFileEncryption.execute(walletFile.getParent(), getWalletName(walletFile, null), "AES",
+                        currentPassword == null ? null : currentPassword.toCharArray(),
+                        newPassword == null ? null : newPassword.toCharArray(), true);
+
+                if(newPassword != null) {
+                    writeBinaryHeader(walletFile);
+                }
+
+                //This sets the new password on the datasource for the next updatePassword check
+                getDataSource(storage, newPassword);
+            } catch(Exception e) {
+                log.error("Error changing database password", e);
+            }
+        }
+    }
+
+    private String getDatasourcePassword() {
+        if(dataSource != null) {
+            String dsPassword = dataSource.getPassword();
+            if(dsPassword.isEmpty()) {
+                return null;
+            }
+
+            return dsPassword.substring(0, dsPassword.length() - (" " + H2_PASSWORD).length());
+        }
+
+        return null;
+    }
+
+    @Override
+    public ECKey getEncryptionKey(CharSequence password) throws IOException {
+        return getEncryptionKey(password, null, null);
+    }
+
+    private ECKey getEncryptionKey(CharSequence password, File walletFile, ECKey alreadyDerivedKey) throws IOException {
+        if(alreadyDerivedKey != null) {
+            return alreadyDerivedKey;
+        } else if(password == null) {
+            return null;
+        } else if(password.equals("")) {
+            return Storage.NO_PASSWORD_KEY;
+        }
+
+        AsymmetricKeyDeriver keyDeriver = getKeyDeriver(walletFile);
+        return keyDeriver.deriveECKey(password);
+    }
+
+    @Override
+    public AsymmetricKeyDeriver getKeyDeriver() {
+        return keyDeriver;
+    }
+
+    @Override
+    public void setKeyDeriver(AsymmetricKeyDeriver keyDeriver) {
+        this.keyDeriver = keyDeriver;
+    }
+
+    private AsymmetricKeyDeriver getKeyDeriver(File walletFile) throws IOException {
+        if(keyDeriver == null) {
+            keyDeriver = getWalletKeyDeriver(walletFile);
+        }
+
+        return keyDeriver;
+    }
+
+    private AsymmetricKeyDeriver getWalletKeyDeriver(File walletFile) throws IOException {
+        if(keyDeriver == null) {
+            byte[] salt = new byte[SALT_LENGTH_BYTES];
+
+            if(walletFile != null && walletFile.exists()) {
+                try(InputStream inputStream = new FileInputStream(walletFile)) {
+                    inputStream.skip(H2_ENCRYPT_HEADER.length + H2_ENCRYPT_SALT_LENGTH_BYTES + HEADER_MAGIC_1.length);
+                    inputStream.read(salt, 0, salt.length);
+                }
+            } else {
+                SecureRandom secureRandom = new SecureRandom();
+                secureRandom.nextBytes(salt);
+            }
+
+            return new Argon2KeyDeriver(salt);
+        }
+
+        return keyDeriver;
+    }
+
+    @Override
+    public boolean isEncrypted(File walletFile) throws IOException {
+        if(dataSource != null) {
+            return getDatasourcePassword() != null;
+        }
+
+        byte[] header = new byte[H2_ENCRYPT_HEADER.length];
+        try(InputStream inputStream = new FileInputStream(walletFile)) {
+            inputStream.read(header, 0, H2_ENCRYPT_HEADER.length);
+            return Arrays.equals(H2_ENCRYPT_HEADER, header);
+        }
+    }
+
+    @Override
+    public String getWalletId(Storage storage, Wallet wallet) {
+        return storage.getWalletFile().getParentFile().getAbsolutePath() + File.separator + getWalletName(storage.getWalletFile(), null) + ":" + (wallet == null || wallet.isMasterWallet() ? "master" : wallet.getName());
+    }
+
+    @Override
+    public String getWalletName(File walletFile, Wallet wallet) {
+        if(wallet != null && wallet.getMasterWallet() != null) {
+            return wallet.getName();
+        }
+
+        String name = walletFile.getName();
+        if(name.endsWith("." + getType().getExtension())) {
+            name = name.substring(0, name.length() - getType().getExtension().length() - 1);
+        }
+
+        return name;
+    }
+
+    @Override
+    public PersistenceType getType() {
+        return PersistenceType.DB;
+    }
+
+    @Override
+    public void copyWallet(File walletFile, OutputStream outputStream) throws IOException {
+        if(dataSource != null && !dataSource.isClosed()) {
+            dataSource.close();
+        }
+
+        com.google.common.io.Files.copy(walletFile, outputStream);
+    }
+
+    @Override
+    public void close() {
+        EventManager.get().unregister(this);
+        if(dataSource != null && !dataSource.isClosed()) {
+            dataSource.close();
+        }
+    }
+
+    private Jdbi getJdbi(Storage storage, String password) throws StorageException {
+        Jdbi jdbi = Jdbi.create(getDataSource(storage, password));
+        jdbi.installPlugin(new H2DatabasePlugin());
+        jdbi.installPlugin(new SqlObjectPlugin());
+
+        return jdbi;
+    }
+
+    private Flyway getFlyway(Storage storage, String schema, String password, File resourcesDir) throws StorageException {
+        return Flyway.configure().dataSource(getDataSource(storage, password)).locations("filesystem:" + resourcesDir.getAbsolutePath()).schemas(schema).failOnMissingLocations(true).load();
+    }
+
+    //Flyway does not support JPMS yet, so the migration files are extracted to a temp dir in order to avoid classloader encapsulation issues
+    private File getMigrationDir() {
+        File migrationDir = Files.createTempDir();
+        try {
+            String[] files = IOUtils.getResourceListing(DbPersistence.class, MIGRATION_RESOURCES_DIR);
+            for(String name : files) {
+                File targetFile = new File(migrationDir, name);
+                try(InputStream inputStream = DbPersistence.class.getResourceAsStream("/" + MIGRATION_RESOURCES_DIR + name)) {
+                    if(inputStream != null) {
+                        java.nio.file.Files.copy(inputStream, targetFile.toPath(), StandardCopyOption.REPLACE_EXISTING);
+                    } else {
+                        log.error("Could not load resource at /" + MIGRATION_RESOURCES_DIR + name);
+                    }
+                }
+            }
+        } catch(Exception e) {
+            log.error("Could not extract migration resources", e);
+        }
+
+        return migrationDir;
+    }
+
+    private HikariDataSource getDataSource(Storage storage, String password) throws StorageException {
+        if(dataSource == null || dataSource.isClosed()) {
+            dataSource = createDataSource(storage.getWalletFile(), password);
+        }
+
+        return dataSource;
+    }
+
+    private HikariDataSource createDataSource(File walletFile, String password) throws StorageException {
+        try {
+            Class.forName("org.h2.Driver");
+            HikariConfig config = new HikariConfig();
+            config.setJdbcUrl(getUrl(walletFile, password));
+            config.setUsername(H2_USER);
+            config.setPassword(password == null ? H2_PASSWORD : password + " " + H2_PASSWORD);
+            return new HikariDataSource(config);
+        } catch(ClassNotFoundException e) {
+            log.error("Cannot find H2 driver", e);
+            throw new StorageException("Cannot find H2 driver", e);
+        } catch(HikariPool.PoolInitializationException e) {
+            if(e.getMessage() != null && e.getMessage().contains("Database may be already in use")) {
+                log.error("Wallet file may already be in use. Make sure the application is not running elsewhere.", e);
+                throw new StorageException("Wallet file may already be in use. Make sure the application is not running elsewhere.", e);
+            } else if(e.getMessage() != null && (e.getMessage().contains("Wrong user name or password") || e.getMessage().contains("Encryption error in file"))) {
+                throw new InvalidPasswordException("Incorrect password for wallet file.", e);
+            } else {
+                log.error("Failed to open database file", e);
+                throw new StorageException("Failed to open database file.\n" + e.getMessage(), e);
+            }
+        }
+    }
+
+    private String getUrl(File walletFile, String password) {
+        return "jdbc:h2:" + walletFile.getAbsolutePath().replace("." + getType().getExtension(), "") + ";INIT=SET TRACE_LEVEL_FILE=4;TRACE_LEVEL_FILE=4;DATABASE_TO_UPPER=false" + (password == null ? "" : ";CIPHER=AES");
+    }
+
+    private boolean persistsFor(Wallet wallet) {
+        if(masterWallet != null) {
+            if(wallet == masterWallet) {
+                return true;
+            }
+
+            return masterWallet.getChildWallets().contains(wallet);
+        }
+
+        return false;
+    }
+
+    @Subscribe
+    public void walletHistoryCleared(WalletHistoryClearedEvent event) {
+        if(persistsFor(event.getWallet())) {
+            dirtyPersistablesMap.computeIfAbsent(event.getWallet(), key -> new DirtyPersistables()).clearHistory = true;
+        }
+    }
+
+    @Subscribe
+    public void walletHistoryChanged(WalletHistoryChangedEvent event) {
+        if(persistsFor(event.getWallet())) {
+            dirtyPersistablesMap.computeIfAbsent(event.getWallet(), key -> new DirtyPersistables()).historyNodes.addAll(event.getHistoryChangedNodes());
+        }
+    }
+
+    @Subscribe
+    public void walletBlockHeightChanged(WalletBlockHeightChangedEvent event) {
+        if(persistsFor(event.getWallet())) {
+            dirtyPersistablesMap.computeIfAbsent(event.getWallet(), key -> new DirtyPersistables()).blockHeight = event.getBlockHeight();
+        }
+    }
+
+    @Subscribe
+    public void walletEntryLabelsChanged(WalletEntryLabelsChangedEvent event) {
+        if(persistsFor(event.getWallet())) {
+            dirtyPersistablesMap.computeIfAbsent(event.getWallet(), key -> new DirtyPersistables()).labelEntries.addAll(event.getEntries());
+        }
+    }
+
+    @Subscribe
+    public void walletUtxoStatusChanged(WalletUtxoStatusChangedEvent event) {
+        if(persistsFor(event.getWallet())) {
+            dirtyPersistablesMap.computeIfAbsent(event.getWallet(), key -> new DirtyPersistables()).utxoStatuses.add(event.getUtxo());
+        }
+    }
+
+    @Subscribe
+    public void keystoreLabelsChanged(KeystoreLabelsChangedEvent event) {
+        if(persistsFor(event.getWallet())) {
+            dirtyPersistablesMap.computeIfAbsent(event.getWallet(), key -> new DirtyPersistables()).labelKeystores.addAll(event.getChangedKeystores());
+        }
+    }
+
+    @Subscribe
+    public void keystoreEncryptionChanged(KeystoreEncryptionChangedEvent event) {
+        if(persistsFor(event.getWallet())) {
+            dirtyPersistablesMap.computeIfAbsent(event.getWallet(), key -> new DirtyPersistables()).encryptionKeystores.addAll(event.getChangedKeystores());
+        }
+    }
+
+    private static class DirtyPersistables {
+        public boolean clearHistory;
+        public final List<WalletNode> historyNodes = new ArrayList<>();
+        public Integer blockHeight = null;
+        public final List<Entry> labelEntries = new ArrayList<>();
+        public final List<BlockTransactionHashIndex> utxoStatuses = new ArrayList<>();
+        public final List<Keystore> labelKeystores = new ArrayList<>();
+        public final List<Keystore> encryptionKeystores = new ArrayList<>();
+
+        public String toString() {
+            return "Dirty Persistables" +
+                    "\nClear history:" + clearHistory +
+                    "\nNodes:" + historyNodes +
+                    "\nBlockHeight:" + blockHeight +
+                    "\nTx labels:" + labelEntries.stream().filter(entry -> entry instanceof TransactionEntry).map(entry -> ((TransactionEntry)entry).getBlockTransaction().getHash().toString()).collect(Collectors.toList()) +
+                    "\nAddress labels:" + labelEntries.stream().filter(entry -> entry instanceof NodeEntry).map(entry -> ((NodeEntry)entry).getNode().toString() + " " + entry.getLabel()).collect(Collectors.toList()) +
+                    "\nUTXO labels:" + labelEntries.stream().filter(entry -> entry instanceof HashIndexEntry).map(entry -> ((HashIndexEntry)entry).getHashIndex().toString()).collect(Collectors.toList()) +
+                    "\nUTXO statuses:" + utxoStatuses +
+                    "\nKeystore labels:" + labelKeystores.stream().map(Keystore::getLabel).collect(Collectors.toList()) +
+                    "\nKeystore encryptions:" + encryptionKeystores.stream().map(Keystore::getLabel).collect(Collectors.toList());
+        }
+    }
+}
@@ -0,0 +1,102 @@
+package com.sparrowwallet.sparrow.io.db;
+
+import com.sparrowwallet.drongo.crypto.EncryptedData;
+import com.sparrowwallet.drongo.wallet.DeterministicSeed;
+import com.sparrowwallet.drongo.wallet.Keystore;
+import com.sparrowwallet.drongo.wallet.MasterPrivateExtendedKey;
+import com.sparrowwallet.drongo.wallet.Wallet;
+import org.jdbi.v3.sqlobject.config.RegisterRowMapper;
+import org.jdbi.v3.sqlobject.statement.GetGeneratedKeys;
+import org.jdbi.v3.sqlobject.statement.SqlQuery;
+import org.jdbi.v3.sqlobject.statement.SqlUpdate;
+
+import java.util.List;
+
+public interface KeystoreDao {
+    @SqlQuery("select keystore.id, keystore.label, keystore.source, keystore.walletModel, keystore.masterFingerprint, keystore.derivationPath, keystore.extendedPublicKey, " +
+              "masterPrivateExtendedKey.id, masterPrivateExtendedKey.privateKey, masterPrivateExtendedKey.chainCode, masterPrivateExtendedKey.initialisationVector, masterPrivateExtendedKey.encryptedBytes, masterPrivateExtendedKey.keySalt, masterPrivateExtendedKey.deriver, masterPrivateExtendedKey.crypter, " +
+              "seed.id, seed.type, seed.mnemonicString, seed.initialisationVector, seed.encryptedBytes, seed.keySalt, seed.deriver, seed.crypter, seed.needsPassphrase, seed.creationTimeSeconds " +
+              "from keystore left join masterPrivateExtendedKey on keystore.masterPrivateExtendedKey = masterPrivateExtendedKey.id left join seed on keystore.seed = seed.id where keystore.wallet = ? order by keystore.index asc")
+    @RegisterRowMapper(KeystoreMapper.class)
+    List<Keystore> getForWalletId(Long id);
+
+    @SqlUpdate("insert into keystore (label, source, walletModel, masterFingerprint, derivationPath, extendedPublicKey, masterPrivateExtendedKey, seed, wallet, index) values (?, ?, ?, ?, ?, ?, ?, ?, ?, ?)")
+    @GetGeneratedKeys("id")
+    long insert(String label, int source, int walletModel, String masterFingerprint, String derivationPath, String extendedPublicKey, Long masterPrivateExtendedKey, Long seed, long wallet, int index);
+
+    @SqlUpdate("insert into masterPrivateExtendedKey (privateKey, chainCode, initialisationVector, encryptedBytes, keySalt, deriver, crypter, creationTimeSeconds) values (?, ?, ?, ?, ?, ?, ?, ?)")
+    @GetGeneratedKeys("id")
+    long insertMasterPrivateExtendedKey(byte[] privateKey, byte[] chainCode, byte[] initialisationVector, byte[] encryptedBytes, byte[] keySalt, Integer deriver, Integer crypter, long creationTimeSeconds);
+
+    @SqlUpdate("update masterPrivateExtendedKey set privateKey = ?, chainCode = ?, initialisationVector = ?, encryptedBytes = ?, keySalt = ?, deriver = ?, crypter = ?, creationTimeSeconds = ? where id = ?")
+    void updateMasterPrivateExtendedKey(byte[] privateKey, byte[] chainCode, byte[] initialisationVector, byte[] encryptedBytes, byte[] keySalt, Integer deriver, Integer crypter, long creationTimeSeconds, long id);
+
+    @SqlUpdate("insert into seed (type, mnemonicString, initialisationVector, encryptedBytes, keySalt, deriver, crypter, needsPassphrase, creationTimeSeconds) values (?, ?, ?, ?, ?, ?, ?, ?, ?)")
+    @GetGeneratedKeys("id")
+    long insertSeed(int type, String mnemonicString, byte[] initialisationVector, byte[] encryptedBytes, byte[] keySalt, Integer deriver, Integer crypter, boolean needsPassphrase, long creationTimeSeconds);
+
+    @SqlUpdate("update seed set type = ?, mnemonicString = ?, initialisationVector = ?, encryptedBytes = ?, keySalt = ?, deriver = ?, crypter = ?, needsPassphrase = ?, creationTimeSeconds = ? where id = ?")
+    void updateSeed(int type, String mnemonicString, byte[] initialisationVector, byte[] encryptedBytes, byte[] keySalt, Integer deriver, Integer crypter, boolean needsPassphrase, long creationTimeSeconds, long id);
+
+    @SqlUpdate("update keystore set label = ? where id = ?")
+    void updateLabel(String label, long id);
+
+    default void addKeystores(Wallet wallet) {
+        for(int i = 0; i < wallet.getKeystores().size(); i++) {
+            Keystore keystore = wallet.getKeystores().get(i);
+            if(keystore.hasMasterPrivateExtendedKey()) {
+                MasterPrivateExtendedKey mpek = keystore.getMasterPrivateExtendedKey();
+                if(mpek.isEncrypted()) {
+                    EncryptedData data = mpek.getEncryptedData();
+                    long id = insertMasterPrivateExtendedKey(null, null, data.getInitialisationVector(), data.getEncryptedBytes(), data.getKeySalt(), data.getEncryptionType().getDeriver().ordinal(), data.getEncryptionType().getCrypter().ordinal(), mpek.getCreationTimeSeconds());
+                    mpek.setId(id);
+                } else {
+                    long id = insertMasterPrivateExtendedKey(mpek.getPrivateKey().getPrivKeyBytes(), mpek.getPrivateKey().getChainCode(), null, null, null, null, null, mpek.getCreationTimeSeconds());
+                    mpek.setId(id);
+                }
+            }
+
+            if(keystore.hasSeed()) {
+                DeterministicSeed seed = keystore.getSeed();
+                if(seed.isEncrypted()) {
+                    EncryptedData data = seed.getEncryptedData();
+                    long id = insertSeed(seed.getType().ordinal(), null, data.getInitialisationVector(), data.getEncryptedBytes(), data.getKeySalt(), data.getEncryptionType().getDeriver().ordinal(), data.getEncryptionType().getCrypter().ordinal(), seed.needsPassphrase(), seed.getCreationTimeSeconds());
+                    seed.setId(id);
+                } else {
+                    long id = insertSeed(seed.getType().ordinal(), seed.getMnemonicString().asString(), null, null, null, null, null, seed.needsPassphrase(), seed.getCreationTimeSeconds());
+                    seed.setId(id);
+                }
+            }
+
+            long id = insert(keystore.getLabel(), keystore.getSource().ordinal(), keystore.getWalletModel().ordinal(),
+                    keystore.hasPrivateKey() ? null : keystore.getKeyDerivation().getMasterFingerprint(),
+                    keystore.getKeyDerivation().getDerivationPath(),
+                    keystore.hasPrivateKey() ? null : keystore.getExtendedPublicKey().toString(),
+                    keystore.getMasterPrivateExtendedKey() == null ? null : keystore.getMasterPrivateExtendedKey().getId(),
+                    keystore.getSeed() == null ? null : keystore.getSeed().getId(), wallet.getId(), i);
+            keystore.setId(id);
+        }
+    }
+
+    default void updateKeystoreEncryption(Keystore keystore) {
+        if(keystore.hasMasterPrivateExtendedKey()) {
+            MasterPrivateExtendedKey mpek = keystore.getMasterPrivateExtendedKey();
+            if(mpek.isEncrypted()) {
+                EncryptedData data = mpek.getEncryptedData();
+                updateMasterPrivateExtendedKey(null, null, data.getInitialisationVector(), data.getEncryptedBytes(), data.getKeySalt(), data.getEncryptionType().getDeriver().ordinal(), data.getEncryptionType().getCrypter().ordinal(), mpek.getCreationTimeSeconds(), mpek.getId());
+            } else {
+                updateMasterPrivateExtendedKey(mpek.getPrivateKey().getPrivKeyBytes(), mpek.getPrivateKey().getChainCode(), null, null, null, null, null, mpek.getCreationTimeSeconds(), mpek.getId());
+            }
+        }
+
+        if(keystore.hasSeed()) {
+            DeterministicSeed seed = keystore.getSeed();
+            if(seed.isEncrypted()) {
+                EncryptedData data = seed.getEncryptedData();
+                updateSeed(seed.getType().ordinal(), null, data.getInitialisationVector(), data.getEncryptedBytes(), data.getKeySalt(), data.getEncryptionType().getDeriver().ordinal(), data.getEncryptionType().getCrypter().ordinal(), seed.needsPassphrase(), seed.getCreationTimeSeconds(), seed.getId());
+            } else {
+                updateSeed(seed.getType().ordinal(), seed.getMnemonicString().asString(), null, null, null, null, null, seed.needsPassphrase(), seed.getCreationTimeSeconds(), seed.getId());
+            }
+        }
+    }
+}
@@ -0,0 +1,58 @@
+package com.sparrowwallet.sparrow.io.db;
+
+import com.sparrowwallet.drongo.ExtendedKey;
+import com.sparrowwallet.drongo.KeyDerivation;
+import com.sparrowwallet.drongo.crypto.EncryptedData;
+import com.sparrowwallet.drongo.crypto.EncryptionType;
+import com.sparrowwallet.drongo.wallet.*;
+import org.jdbi.v3.core.mapper.RowMapper;
+import org.jdbi.v3.core.statement.StatementContext;
+
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.Arrays;
+import java.util.List;
+
+public class KeystoreMapper implements RowMapper<Keystore> {
+
+    @Override
+    public Keystore map(ResultSet rs, StatementContext ctx) throws SQLException {
+        Keystore keystore = new Keystore(rs.getString("keystore.label"));
+        keystore.setId(rs.getLong("keystore.id"));
+        keystore.setSource(KeystoreSource.values()[rs.getInt("keystore.source")]);
+        keystore.setWalletModel(WalletModel.values()[rs.getInt("keystore.walletModel")]);
+        keystore.setKeyDerivation(new KeyDerivation(rs.getString("keystore.masterFingerprint"), rs.getString("keystore.derivationPath")));
+        keystore.setExtendedPublicKey(rs.getString("keystore.extendedPublicKey") == null ? null : ExtendedKey.fromDescriptor(rs.getString("keystore.extendedPublicKey")));
+
+        if(rs.getBytes("masterPrivateExtendedKey.privateKey") != null) {
+            MasterPrivateExtendedKey masterPrivateExtendedKey = new MasterPrivateExtendedKey(rs.getBytes("masterPrivateExtendedKey.privateKey"), rs.getBytes("masterPrivateExtendedKey.chainCode"));
+            masterPrivateExtendedKey.setId(rs.getLong("masterPrivateExtendedKey.id"));
+            keystore.setMasterPrivateExtendedKey(masterPrivateExtendedKey);
+        } else if(rs.getBytes("masterPrivateExtendedKey.encryptedBytes") != null) {
+            EncryptedData encryptedData = new EncryptedData(rs.getBytes("masterPrivateExtendedKey.initialisationVector"),
+                    rs.getBytes("masterPrivateExtendedKey.encryptedBytes"), rs.getBytes("masterPrivateExtendedKey.keySalt"),
+                    EncryptionType.Deriver.values()[rs.getInt("masterPrivateExtendedKey.deriver")],
+                    EncryptionType.Crypter.values()[rs.getInt("masterPrivateExtendedKey.crypter")]);
+            MasterPrivateExtendedKey masterPrivateExtendedKey = new MasterPrivateExtendedKey(encryptedData);
+            masterPrivateExtendedKey.setId(rs.getLong("masterPrivateExtendedKey.id"));
+            keystore.setMasterPrivateExtendedKey(masterPrivateExtendedKey);
+        }
+
+        if(rs.getString("seed.mnemonicString") != null) {
+            List<String> mnemonicCode = Arrays.asList(rs.getString("seed.mnemonicString").split(" "));
+            DeterministicSeed seed = new DeterministicSeed(mnemonicCode, rs.getBoolean("seed.needsPassphrase"), rs.getLong("seed.creationTimeSeconds"), DeterministicSeed.Type.values()[rs.getInt("seed.type")]);
+            seed.setId(rs.getLong("seed.id"));
+            keystore.setSeed(seed);
+        } else if(rs.getBytes("seed.encryptedBytes") != null) {
+            EncryptedData encryptedData = new EncryptedData(rs.getBytes("seed.initialisationVector"),
+                    rs.getBytes("seed.encryptedBytes"), rs.getBytes("seed.keySalt"),
+                    EncryptionType.Deriver.values()[rs.getInt("seed.deriver")],
+                    EncryptionType.Crypter.values()[rs.getInt("seed.crypter")]);
+            DeterministicSeed seed = new DeterministicSeed(encryptedData, rs.getBoolean("seed.needsPassphrase"), rs.getLong("seed.creationTimeSeconds"), DeterministicSeed.Type.values()[rs.getInt("seed.type")]);
+            seed.setId(rs.getLong("seed.id"));
+            keystore.setSeed(seed);
+        }
+
+        return keystore;
+    }
+}
@@ -0,0 +1,22 @@
+package com.sparrowwallet.sparrow.io.db;
+
+import com.sparrowwallet.drongo.policy.Policy;
+import org.jdbi.v3.sqlobject.config.RegisterRowMapper;
+import org.jdbi.v3.sqlobject.statement.GetGeneratedKeys;
+import org.jdbi.v3.sqlobject.statement.SqlQuery;
+import org.jdbi.v3.sqlobject.statement.SqlUpdate;
+
+public interface PolicyDao {
+    @SqlQuery("select * from policy where id = ?")
+    @RegisterRowMapper(PolicyMapper.class)
+    Policy getPolicy(long id);
+
+    @SqlUpdate("insert into policy (name, script) values (?, ?)")
+    @GetGeneratedKeys("id")
+    long insert(String name, String script);
+
+    default void addPolicy(Policy policy) {
+        long id = insert(policy.getName(), policy.getMiniscript().getScript());
+        policy.setId(id);
+    }
+}
@@ -0,0 +1,18 @@
+package com.sparrowwallet.sparrow.io.db;
+
+import com.sparrowwallet.drongo.policy.Miniscript;
+import com.sparrowwallet.drongo.policy.Policy;
+import org.jdbi.v3.core.mapper.RowMapper;
+import org.jdbi.v3.core.statement.StatementContext;
+
+import java.sql.ResultSet;
+import java.sql.SQLException;
+
+public class PolicyMapper implements RowMapper<Policy> {
+    @Override
+    public Policy map(ResultSet rs, StatementContext ctx) throws SQLException {
+        Policy policy = new Policy(rs.getString("name"), new Miniscript(rs.getString("script")));
+        policy.setId(rs.getLong("id"));
+        return policy;
+    }
+}
@@ -0,0 +1,106 @@
+package com.sparrowwallet.sparrow.io.db;
+
+import com.sparrowwallet.drongo.protocol.Sha256Hash;
+import com.sparrowwallet.drongo.wallet.BlockTransaction;
+import com.sparrowwallet.drongo.wallet.Wallet;
+import com.sparrowwallet.drongo.wallet.WalletNode;
+import org.jdbi.v3.sqlobject.CreateSqlObject;
+import org.jdbi.v3.sqlobject.config.RegisterRowMapper;
+import org.jdbi.v3.sqlobject.customizer.Bind;
+import org.jdbi.v3.sqlobject.statement.GetGeneratedKeys;
+import org.jdbi.v3.sqlobject.statement.SqlQuery;
+import org.jdbi.v3.sqlobject.statement.SqlUpdate;
+
+import java.util.Date;
+import java.util.List;
+import java.util.Map;
+import java.util.stream.Collectors;
+
+public interface WalletDao {
+    @CreateSqlObject
+    PolicyDao createPolicyDao();
+
+    @CreateSqlObject
+    KeystoreDao createKeystoreDao();
+
+    @CreateSqlObject
+    WalletNodeDao createWalletNodeDao();
+
+    @CreateSqlObject
+    BlockTransactionDao createBlockTransactionDao();
+
+    @SqlQuery("select wallet.id, wallet.name, wallet.network, wallet.policyType, wallet.scriptType, wallet.storedBlockHeight, wallet.gapLimit, wallet.birthDate, policy.id, policy.name, policy.script from wallet left join policy on wallet.defaultPolicy = policy.id")
+    @RegisterRowMapper(WalletMapper.class)
+    List<Wallet> loadAllWallets();
+
+    @SqlQuery("select wallet.id, wallet.name, wallet.network, wallet.policyType, wallet.scriptType, wallet.storedBlockHeight, wallet.gapLimit, wallet.birthDate, policy.id, policy.name, policy.script from wallet left join policy on wallet.defaultPolicy = policy.id where wallet.id = 1")
+    @RegisterRowMapper(WalletMapper.class)
+    Wallet loadMainWallet();
+
+    @SqlQuery("select wallet.id, wallet.name, wallet.network, wallet.policyType, wallet.scriptType, wallet.storedBlockHeight, wallet.gapLimit, wallet.birthDate, policy.id, policy.name, policy.script from wallet left join policy on wallet.defaultPolicy = policy.id where wallet.id != 1")
+    @RegisterRowMapper(WalletMapper.class)
+    List<Wallet> loadChildWallets();
+
+    @SqlUpdate("insert into wallet (name, network, policyType, scriptType, storedBlockHeight, gapLimit, birthDate, defaultPolicy) values (?, ?, ?, ?, ?, ?, ?, ?)")
+    @GetGeneratedKeys("id")
+    long insert(String name, int network, int policyType, int scriptType, Integer storedBlockHeight, Integer gapLimit, Date birthDate, long defaultPolicy);
+
+    @SqlUpdate("update wallet set storedBlockHeight = :blockHeight where id = :id")
+    void updateStoredBlockHeight(@Bind("id") long id, @Bind("blockHeight") Integer blockHeight);
+
+    @SqlUpdate("set schema ?")
+    int setSchema(String schema);
+
+    default Wallet getMainWallet(String schema) {
+        try {
+            setSchema(schema);
+            Wallet mainWallet = loadMainWallet();
+            if(mainWallet != null) {
+                loadWallet(mainWallet);
+            }
+
+            return mainWallet;
+        } finally {
+            setSchema(DbPersistence.DEFAULT_SCHEMA);
+        }
+    }
+
+    default List<Wallet> getChildWallets(String schema) {
+        try {
+            List<Wallet> childWallets = loadChildWallets();
+            for(Wallet childWallet : childWallets) {
+                loadWallet(childWallet);
+            }
+
+            return childWallets;
+        } finally {
+            setSchema(DbPersistence.DEFAULT_SCHEMA);
+        }
+    }
+
+    default void loadWallet(Wallet wallet) {
+        wallet.getKeystores().addAll(createKeystoreDao().getForWalletId(wallet.getId()));
+
+        List<WalletNode> walletNodes = createWalletNodeDao().getForWalletId(wallet.getId());
+        wallet.getPurposeNodes().addAll(walletNodes.stream().filter(walletNode -> walletNode.getDerivation().size() == 1).collect(Collectors.toList()));
+
+        Map<Sha256Hash, BlockTransaction> blockTransactions = createBlockTransactionDao().getForWalletId(wallet.getId()); //.stream().collect(Collectors.toMap(BlockTransaction::getHash, Function.identity(), (existing, replacement) -> existing, LinkedHashMap::new));
+        wallet.updateTransactions(blockTransactions);
+    }
+
+    default void addWallet(String schema, Wallet wallet) {
+        try {
+            setSchema(schema);
+            createPolicyDao().addPolicy(wallet.getDefaultPolicy());
+
+            long id = insert(wallet.getName(), wallet.getNetwork().ordinal(), wallet.getPolicyType().ordinal(), wallet.getScriptType().ordinal(), wallet.getStoredBlockHeight(), wallet.gapLimit(), wallet.getBirthDate(), wallet.getDefaultPolicy().getId());
+            wallet.setId(id);
+
+            createKeystoreDao().addKeystores(wallet);
+            createWalletNodeDao().addWalletNodes(wallet);
+            createBlockTransactionDao().addBlockTransactions(wallet);
+        } finally {
+            setSchema(DbPersistence.DEFAULT_SCHEMA);
+        }
+    }
+}
@@ -0,0 +1,37 @@
+package com.sparrowwallet.sparrow.io.db;
+
+import com.sparrowwallet.drongo.Network;
+import com.sparrowwallet.drongo.policy.Miniscript;
+import com.sparrowwallet.drongo.policy.Policy;
+import com.sparrowwallet.drongo.policy.PolicyType;
+import com.sparrowwallet.drongo.protocol.ScriptType;
+import com.sparrowwallet.drongo.wallet.Wallet;
+import org.jdbi.v3.core.mapper.RowMapper;
+import org.jdbi.v3.core.statement.StatementContext;
+
+import java.sql.ResultSet;
+import java.sql.SQLException;
+
+public class WalletMapper implements RowMapper<Wallet> {
+    @Override
+    public Wallet map(ResultSet rs, StatementContext ctx) throws SQLException {
+        Wallet wallet = new Wallet(rs.getString("wallet.name"));
+        wallet.setId(rs.getLong("wallet.id"));
+        wallet.setNetwork(Network.values()[rs.getInt("wallet.network")]);
+        wallet.setPolicyType(PolicyType.values()[rs.getInt("wallet.policyType")]);
+        wallet.setScriptType(ScriptType.values()[rs.getInt("wallet.scriptType")]);
+
+        Policy policy = new Policy(rs.getString("policy.name"), new Miniscript(rs.getString("policy.script")));
+        policy.setId(rs.getLong("policy.id"));
+        wallet.setDefaultPolicy(policy);
+
+        int storedBlockHeight = rs.getInt("wallet.storedBlockHeight");
+        wallet.setStoredBlockHeight(rs.wasNull() ? null : storedBlockHeight);
+
+        int gapLimit = rs.getInt("wallet.gapLimit");
+        wallet.gapLimit(rs.wasNull() ? null : gapLimit);
+        wallet.setBirthDate(rs.getTimestamp("wallet.birthDate"));
+
+        return wallet;
+    }
+}
@@ -0,0 +1,116 @@
+package com.sparrowwallet.sparrow.io.db;
+
+import com.sparrowwallet.drongo.wallet.BlockTransactionHashIndex;
+import com.sparrowwallet.drongo.wallet.Wallet;
+import com.sparrowwallet.drongo.wallet.WalletNode;
+import org.jdbi.v3.sqlobject.config.RegisterRowMapper;
+import org.jdbi.v3.sqlobject.customizer.Bind;
+import org.jdbi.v3.sqlobject.customizer.BindList;
+import org.jdbi.v3.sqlobject.statement.GetGeneratedKeys;
+import org.jdbi.v3.sqlobject.statement.SqlQuery;
+import org.jdbi.v3.sqlobject.statement.SqlUpdate;
+import org.jdbi.v3.sqlobject.statement.UseRowReducer;
+
+import java.util.Date;
+import java.util.List;
+
+public interface WalletNodeDao {
+    @SqlQuery("select walletNode.id, walletNode.derivationPath, walletNode.label, walletNode.parent, " +
+            "blockTransactionHashIndex.id, blockTransactionHashIndex.hash, blockTransactionHashIndex.height, blockTransactionHashIndex.date, blockTransactionHashIndex.fee, blockTransactionHashIndex.label, " +
+            "blockTransactionHashIndex.index, blockTransactionHashIndex.outputValue, blockTransactionHashIndex.status, blockTransactionHashIndex.spentBy, blockTransactionHashIndex.node " +
+            "from walletNode left join blockTransactionHashIndex on walletNode.id = blockTransactionHashIndex.node where walletNode.wallet = ? order by walletNode.parent asc nulls first, blockTransactionHashIndex.spentBy asc nulls first")
+    @RegisterRowMapper(WalletNodeMapper.class)
+    @RegisterRowMapper(BlockTransactionHashIndexMapper.class)
+    @UseRowReducer(WalletNodeReducer.class)
+    List<WalletNode> getForWalletId(Long id);
+
+    @SqlUpdate("insert into walletNode (derivationPath, label, wallet, parent) values (?, ?, ?, ?)")
+    @GetGeneratedKeys("id")
+    long insertWalletNode(String derivationPath, String label, long wallet, Long parent);
+
+    @SqlUpdate("insert into blockTransactionHashIndex (hash, height, date, fee, label, index, outputValue, status, spentBy, node) values (?, ?, ?, ?, ?, ?, ?, ?, ?, ?)")
+    @GetGeneratedKeys("id")
+    long insertBlockTransactionHashIndex(byte[] hash, int height, Date date, Long fee, String label, long index, long value, Integer status, Long spentBy, long node);
+
+    @SqlUpdate("update blockTransactionHashIndex set hash = ?, height = ?, date = ?, fee = ?, label = ?, index = ?, outputValue = ?, status = ?, spentBy = ?, node = ? where id = ?")
+    void updateBlockTransactionHashIndex(byte[] hash, int height, Date date, Long fee, String label, long index, long value, Integer status, Long spentBy, long node, long id);
+
+    @SqlUpdate("update walletNode set label = :label where id = :id")
+    void updateNodeLabel(@Bind("id") long id, @Bind("label") String label);
+
+    @SqlUpdate("update blockTransactionHashIndex set label = :label where id = :id")
+    void updateTxoLabel(@Bind("id") long id, @Bind("label") String label);
+
+    @SqlUpdate("update blockTransactionHashIndex set status = :status where id = :id")
+    void updateTxoStatus(@Bind("id") long id, @Bind("status") Integer status);
+
+    @SqlUpdate("delete from blockTransactionHashIndex where blockTransactionHashIndex.node in (select walletNode.id from walletNode where walletNode.wallet = ?)")
+    void clearHistory(long wallet);
+
+    @SqlUpdate("delete from blockTransactionHashIndex where blockTransactionHashIndex.node in (select walletNode.id from walletNode where walletNode.wallet = ?) and blockTransactionHashIndex.spentBy is not null")
+    void clearSpentHistory(long wallet);
+
+    @SqlUpdate("delete from blockTransactionHashIndex where node = :nodeId and id not in (<ids>)")
+    void deleteUnreferencedNodeTxos(@Bind("nodeId") Long nodeId, @BindList("ids") List<Long> ids);
+
+    @SqlUpdate("delete from blockTransactionHashIndex where node = :nodeId and id not in (<ids>) and spentBy is not null")
+    void deleteUnreferencedNodeSpentTxos(@Bind("nodeId") Long nodeId, @BindList("ids") List<Long> ids);
+
+    default void addWalletNodes(Wallet wallet) {
+        for(WalletNode purposeNode : wallet.getPurposeNodes()) {
+            long purposeNodeId = insertWalletNode(purposeNode.getDerivationPath(), purposeNode.getLabel(), wallet.getId(), null);
+            purposeNode.setId(purposeNodeId);
+            for(WalletNode addressNode : purposeNode.getChildren()) {
+                long addressNodeId = insertWalletNode(addressNode.getDerivationPath(), addressNode.getLabel(), wallet.getId(), purposeNodeId);
+                addressNode.setId(addressNodeId);
+                addTransactionOutputs(addressNode);
+            }
+        }
+    }
+
+    default void addTransactionOutputs(WalletNode addressNode) {
+        for(BlockTransactionHashIndex txo : addressNode.getTransactionOutputs()) {
+            txo.setId(null);
+            if(txo.isSpent()) {
+                txo.getSpentBy().setId(null);
+            }
+
+            addOrUpdate(addressNode, txo);
+        }
+    }
+
+    default void addOrUpdate(WalletNode addressNode, BlockTransactionHashIndex txo) {
+        Long spentById = null;
+        if(txo.isSpent()) {
+            BlockTransactionHashIndex spentBy = txo.getSpentBy();
+            if(spentBy.getId() == null) {
+                spentById = insertBlockTransactionHashIndex(spentBy.getHash().getBytes(), spentBy.getHeight(), spentBy.getDate(), spentBy.getFee(), spentBy.getLabel(), spentBy.getIndex(), spentBy.getValue(),
+                        spentBy.getStatus() == null ? null : spentBy.getStatus().ordinal(), null, addressNode.getId());
+                spentBy.setId(spentById);
+            } else {
+                updateBlockTransactionHashIndex(spentBy.getHash().getBytes(), spentBy.getHeight(), spentBy.getDate(), spentBy.getFee(), spentBy.getLabel(), spentBy.getIndex(), spentBy.getValue(),
+                        spentBy.getStatus() == null ? null : spentBy.getStatus().ordinal(), null, addressNode.getId(), spentBy.getId());
+                spentById = spentBy.getId();
+            }
+        }
+
+        if(txo.getId() == null) {
+            long txoId = insertBlockTransactionHashIndex(txo.getHash().getBytes(), txo.getHeight(), txo.getDate(), txo.getFee(), txo.getLabel(), txo.getIndex(), txo.getValue(),
+                    txo.getStatus() == null ? null : txo.getStatus().ordinal(), spentById, addressNode.getId());
+            txo.setId(txoId);
+        } else {
+            updateBlockTransactionHashIndex(txo.getHash().getBytes(), txo.getHeight(), txo.getDate(), txo.getFee(), txo.getLabel(), txo.getIndex(), txo.getValue(),
+                    txo.getStatus() == null ? null : txo.getStatus().ordinal(), spentById, addressNode.getId(), txo.getId());
+        }
+    }
+
+    default void deleteNodeTxosNotInList(WalletNode addressNode, List<Long> txoIds) {
+        deleteUnreferencedNodeSpentTxos(addressNode.getId(), txoIds);
+        deleteUnreferencedNodeTxos(addressNode.getId(), txoIds);
+    }
+
+    default void clearHistory(Wallet wallet) {
+        clearSpentHistory(wallet.getId());
+        clearHistory(wallet.getId());
+    }
+}
@@ -0,0 +1,19 @@
+package com.sparrowwallet.sparrow.io.db;
+
+import com.sparrowwallet.drongo.wallet.WalletNode;
+import org.jdbi.v3.core.mapper.RowMapper;
+import org.jdbi.v3.core.statement.StatementContext;
+
+import java.sql.ResultSet;
+import java.sql.SQLException;
+
+public class WalletNodeMapper implements RowMapper<WalletNode> {
+    @Override
+    public WalletNode map(ResultSet rs, StatementContext ctx) throws SQLException {
+        WalletNode walletNode = new WalletNode(rs.getString("walletNode.derivationPath"));
+        walletNode.setId(rs.getLong("walletNode.id"));
+        walletNode.setLabel(rs.getString("walletNode.label"));
+
+        return walletNode;
+    }
+}
@@ -0,0 +1,30 @@
+package com.sparrowwallet.sparrow.io.db;
+
+import com.sparrowwallet.drongo.wallet.BlockTransactionHashIndex;
+import com.sparrowwallet.drongo.wallet.WalletNode;
+import org.jdbi.v3.core.result.LinkedHashMapRowReducer;
+import org.jdbi.v3.core.result.RowView;
+
+import java.util.Map;
+
+public class WalletNodeReducer implements LinkedHashMapRowReducer<Long, WalletNode> {
+    @Override
+    public void accumulate(Map<Long, WalletNode> map, RowView rowView) {
+        WalletNode walletNode = map.computeIfAbsent(rowView.getColumn("walletNode.id", Long.class), id -> rowView.getRow(WalletNode.class));
+
+        if(rowView.getColumn("walletNode.parent", Long.class) != null) {
+            WalletNode parentNode = map.get(rowView.getColumn("walletNode.parent", Long.class));
+            parentNode.getChildren().add(walletNode);
+        }
+
+        if(rowView.getColumn("blockTransactionHashIndex.node", Long.class) != null) {
+            BlockTransactionHashIndex blockTransactionHashIndex = rowView.getRow(BlockTransactionHashIndex.class);
+            if(rowView.getColumn("blockTransactionHashIndex.spentBy", Long.class) != null) {
+                BlockTransactionHashIndex spentBy = walletNode.getTransactionOutputs().stream().filter(ref -> ref.getId().equals(rowView.getColumn("blockTransactionHashIndex.spentBy", Long.class))).findFirst().orElseThrow();
+                blockTransactionHashIndex.setSpentBy(spentBy);
+                walletNode.getTransactionOutputs().remove(spentBy);
+            }
+            walletNode.getTransactionOutputs().add(blockTransactionHashIndex);
+        }
+    }
+}
@@ -16,9 +16,9 @@ public class HwAirgappedController extends KeystoreImportDetailController {
    public void initializeView() {
        List<KeystoreFileImport> importers = Collections.emptyList();
        if(getMasterController().getWallet().getPolicyType().equals(PolicyType.SINGLE)) {
-            importers = List.of(new ColdcardSinglesig(), new CoboVaultSinglesig(), new PassportSinglesig(), new SpecterDIY());
+            importers = List.of(new ColdcardSinglesig(), new CoboVaultSinglesig(), new KeystoneSinglesig(), new PassportSinglesig(), new SpecterDIY());
        } else if(getMasterController().getWallet().getPolicyType().equals(PolicyType.MULTI)) {
-            importers = List.of(new ColdcardMultisig(), new CoboVaultMultisig(), new PassportMultisig(), new SpecterDIY());
+            importers = List.of(new ColdcardMultisig(), new CoboVaultMultisig(), new KeystoneMultisig(), new PassportMultisig(), new SpecterDIY());
        }

        for(KeystoreImport importer : importers) {
@@ -2,7 +2,6 @@ package com.sparrowwallet.sparrow.keystoreimport;

 import com.sparrowwallet.sparrow.control.DevicePane;
 import com.sparrowwallet.sparrow.io.Device;
-import javafx.collections.FXCollections;
 import javafx.fxml.FXML;
 import javafx.scene.control.Accordion;

@@ -14,7 +13,7 @@ public class HwUsbDevicesController extends KeystoreImportDetailController {

    public void initializeView(List<Device> devices) {
        for(Device device : devices) {
-            DevicePane devicePane = new DevicePane(getMasterController().getWallet(), device);
+            DevicePane devicePane = new DevicePane(getMasterController().getWallet(), device, devices.size() == 1);
            deviceAccordion.getPanes().add(devicePane);
        }
    }
@@ -0,0 +1,167 @@
+package com.sparrowwallet.sparrow.net;
+
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import com.sparrowwallet.drongo.address.Address;
+import com.sparrowwallet.drongo.protocol.ScriptType;
+import com.sparrowwallet.sparrow.AppServices;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.*;
+import java.net.*;
+import java.nio.charset.StandardCharsets;
+import java.util.LinkedHashMap;
+import java.util.Map;
+
+public class Aopp {
+    private static final Logger log = LoggerFactory.getLogger(Aopp.class);
+
+    public static final String SCHEME = "aopp";
+
+    private final int version;
+    private final String message;
+    private final ScriptType scriptType;
+    private final URL callback;
+
+    public Aopp(URI uri) throws MalformedURLException {
+        if(!uri.getScheme().equals(SCHEME)) {
+            throw new IllegalArgumentException("Uri " + uri + " does not have the correct scheme");
+        }
+
+        Map<String, String> parameterMap = new LinkedHashMap<>();
+        String query = uri.getSchemeSpecificPart();
+        if(query.startsWith("?")) {
+            query = query.substring(1);
+        }
+
+        String[] pairs = query.split("&");
+        for(String pair : pairs) {
+            int idx = pair.indexOf("=");
+            parameterMap.put(pair.substring(0, idx), pair.substring(idx + 1));
+        }
+
+        String strVersion = parameterMap.get("v");
+        if(strVersion == null) {
+            throw new IllegalArgumentException("No version parameter provided");
+        }
+
+        version = Integer.parseInt(strVersion);
+        if(version != 0) {
+            throw new IllegalArgumentException("Unsupported version number " + version);
+        }
+
+        String strMessage = parameterMap.get("msg");
+        if(strMessage == null) {
+            throw new IllegalArgumentException("No msg parameter provided");
+        }
+        message = strMessage.replace('+', ' ');
+
+        String asset = parameterMap.get("asset");
+        if(asset == null || !asset.equals("btc")) {
+            throw new IllegalArgumentException("Unsupported asset type " + asset);
+        }
+
+        String format = parameterMap.get("format");
+        if(format == null) {
+            throw new IllegalArgumentException("No format parameter provided");
+        }
+        if(format.equals("p2sh")) {
+            format = "p2sh_p2wpkh";
+        }
+
+        if(format.equals("any")) {
+            scriptType = null;
+        } else {
+            scriptType = ScriptType.valueOf(format.toUpperCase());
+        }
+
+        String callbackUrl = parameterMap.get("callback");
+        if(callbackUrl == null) {
+            throw new IllegalArgumentException("No callback parameter provided");
+        }
+
+        callback = new URL(callbackUrl);
+    }
+
+    public void sendProofOfAddress(Address address, String signature) throws URISyntaxException, IOException, InterruptedException, AoppException {
+        Proxy proxy = AppServices.getProxy();
+
+        CallbackRequest callbackRequest = new CallbackRequest(version, address.toString(), signature);
+        Gson gson = new GsonBuilder().disableHtmlEscaping().create();
+        String json = gson.toJson(callbackRequest);
+
+        if(log.isDebugEnabled()) {
+            log.debug("Sending " + json + " to " + callback);
+        }
+
+        HttpURLConnection connection = proxy == null ? (HttpURLConnection)callback.openConnection() : (HttpURLConnection)callback.openConnection(proxy);
+        connection.setRequestMethod("POST");
+        connection.setRequestProperty("Content-Type", "application/json");
+        connection.setDoOutput(true);
+
+        try(OutputStream os = connection.getOutputStream()) {
+            byte[] jsonBytes = json.getBytes(StandardCharsets.UTF_8);
+            os.write(jsonBytes);
+        }
+
+        StringBuilder response = new StringBuilder();
+        try(BufferedReader br = new BufferedReader(new InputStreamReader(connection.getInputStream(), StandardCharsets.UTF_8))) {
+            String responseLine;
+            while((responseLine = br.readLine()) != null) {
+                response.append(responseLine.trim());
+            }
+        }
+        int statusCode = connection.getResponseCode();
+
+        if(log.isDebugEnabled()) {
+            log.debug("Received " + statusCode + " " + response);
+        }
+
+        if(statusCode < 200 || statusCode >= 300) {
+            throw new AoppException("Could not send proof of ownership. Server returned " + response);
+        }
+    }
+
+    public ScriptType getScriptType() {
+        return scriptType;
+    }
+
+    public String getMessage() {
+        return message;
+    }
+
+    public URL getCallback() {
+        return callback;
+    }
+
+    private static class CallbackRequest {
+        public CallbackRequest(int version, String address, String signature) {
+            this.version = version;
+            this.address = address;
+            this.signature = signature;
+        }
+
+        public int version;
+        public String address;
+        public String signature;
+    }
+
+    public static final class AoppException extends Exception {
+        public AoppException(String message) {
+            super(message);
+        }
+
+        public AoppException(String message, Throwable cause) {
+            super(message, cause);
+        }
+
+        public AoppException(Throwable cause) {
+            super(cause);
+        }
+
+        public AoppException(String message, Throwable cause, boolean enableSuppression, boolean writableStackTrace) {
+            super(message, cause, enableSuppression, writableStackTrace);
+        }
+    }
+}
@@ -5,6 +5,8 @@ import com.github.arteam.simplejsonrpc.client.Transport;
 import com.github.arteam.simplejsonrpc.client.builder.BatchRequestBuilder;
 import com.github.arteam.simplejsonrpc.client.exception.JsonRpcBatchException;
 import com.github.arteam.simplejsonrpc.client.exception.JsonRpcException;
+import com.sparrowwallet.drongo.KeyDerivation;
+import com.sparrowwallet.drongo.crypto.ChildNumber;
 import com.sparrowwallet.drongo.protocol.Sha256Hash;
 import com.sparrowwallet.drongo.wallet.Wallet;
 import com.sparrowwallet.sparrow.EventManager;
@@ -12,16 +14,15 @@ import com.sparrowwallet.sparrow.event.WalletHistoryStatusEvent;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;

-import java.util.List;
-import java.util.Map;
-import java.util.Set;
-import java.util.TreeMap;
+import java.math.BigInteger;
+import java.util.*;
 import java.util.concurrent.atomic.AtomicLong;
+import java.util.stream.Collectors;

 public class BatchedElectrumServerRpc implements ElectrumServerRpc {
    private static final Logger log = LoggerFactory.getLogger(BatchedElectrumServerRpc.class);
-    private static final int MAX_RETRIES = 3;
-    private static final int RETRY_DELAY = 0;
+    private static final int MAX_RETRIES = 5;
+    private static final int RETRY_DELAY = 1;

    private final AtomicLong idCounter = new AtomicLong();

@@ -74,17 +75,17 @@ public class BatchedElectrumServerRpc implements ElectrumServerRpc {
    public Map<String, ScriptHashTx[]> getScriptHashHistory(Transport transport, Wallet wallet, Map<String, String> pathScriptHashes, boolean failOnError) {
        JsonRpcClient client = new JsonRpcClient(transport);
        BatchRequestBuilder<String, ScriptHashTx[]> batchRequest = client.createBatchRequest().keysType(String.class).returnType(ScriptHashTx[].class);
-        EventManager.get().post(new WalletHistoryStatusEvent(wallet, true, "Loading transactions"));
+        EventManager.get().post(new WalletHistoryStatusEvent(wallet, true, "Loading transactions for " + getScriptHashesAbbreviation(pathScriptHashes.keySet())));

        for(String path : pathScriptHashes.keySet()) {
            batchRequest.add(path, "blockchain.scripthash.get_history", pathScriptHashes.get(path));
        }

        try {
-            return new RetryLogic<Map<String, ScriptHashTx[]>>(MAX_RETRIES, RETRY_DELAY, IllegalStateException.class).getResult(batchRequest::execute);
+            return new RetryLogic<Map<String, ScriptHashTx[]>>(MAX_RETRIES, RETRY_DELAY, List.of(IllegalStateException.class, IllegalArgumentException.class)).getResult(batchRequest::execute);
        } catch (JsonRpcBatchException e) {
            if(failOnError) {
-                throw new ElectrumServerRpcException("Failed to retrieve references for paths: " + e.getErrors().keySet(), e);
+                throw new ElectrumServerRpcException("Failed to retrieve transaction history for paths: " + getScriptHashesAbbreviation((Collection<String>)e.getErrors().keySet()), e);
            }

            Map<String, ScriptHashTx[]> result = (Map<String, ScriptHashTx[]>)e.getSuccesses();
@@ -94,7 +95,7 @@ public class BatchedElectrumServerRpc implements ElectrumServerRpc {

            return result;
        } catch(Exception e) {
-            throw new ElectrumServerRpcException("Failed to retrieve references for paths: " + pathScriptHashes.keySet(), e);
+            throw new ElectrumServerRpcException("Failed to retrieve transaction history for paths: " + getScriptHashesAbbreviation(pathScriptHashes.keySet()), e);
        }
    }

@@ -109,10 +110,10 @@ public class BatchedElectrumServerRpc implements ElectrumServerRpc {
        }

        try {
-            return new RetryLogic<Map<String, ScriptHashTx[]>>(MAX_RETRIES, RETRY_DELAY, IllegalStateException.class).getResult(batchRequest::execute);
+            return new RetryLogic<Map<String, ScriptHashTx[]>>(MAX_RETRIES, RETRY_DELAY, List.of(IllegalStateException.class, IllegalArgumentException.class)).getResult(batchRequest::execute);
        } catch(JsonRpcBatchException e) {
            if(failOnError) {
-                throw new ElectrumServerRpcException("Failed to retrieve references for paths: " + e.getErrors().keySet(), e);
+                throw new ElectrumServerRpcException("Failed to retrieve mempool transactions for paths: " + getScriptHashesAbbreviation((Collection<String>)e.getErrors().keySet()), e);
            }

            Map<String, ScriptHashTx[]> result = (Map<String, ScriptHashTx[]>)e.getSuccesses();
@@ -122,27 +123,28 @@ public class BatchedElectrumServerRpc implements ElectrumServerRpc {

            return result;
        } catch(Exception e) {
-            throw new ElectrumServerRpcException("Failed to retrieve references for paths: " + pathScriptHashes.keySet(), e);
+            throw new ElectrumServerRpcException("Failed to retrieve mempool transactions for paths: " + getScriptHashesAbbreviation(pathScriptHashes.keySet()), e);
        }
    }

    @Override
+    @SuppressWarnings("unchecked")
    public Map<String, String> subscribeScriptHashes(Transport transport, Wallet wallet, Map<String, String> pathScriptHashes) {
        JsonRpcClient client = new JsonRpcClient(transport);
        BatchRequestBuilder<String, String> batchRequest = client.createBatchRequest().keysType(String.class).returnType(String.class);
-        EventManager.get().post(new WalletHistoryStatusEvent(wallet, true, "Finding transactions"));
+        EventManager.get().post(new WalletHistoryStatusEvent(wallet, true, "Finding transactions for " + getScriptHashesAbbreviation(pathScriptHashes.keySet())));

        for(String path : pathScriptHashes.keySet()) {
            batchRequest.add(path, "blockchain.scripthash.subscribe", pathScriptHashes.get(path));
        }

        try {
-            return new RetryLogic<Map<String, String>>(MAX_RETRIES, RETRY_DELAY, IllegalStateException.class).getResult(batchRequest::execute);
+            return new RetryLogic<Map<String, String>>(MAX_RETRIES, RETRY_DELAY, List.of(IllegalStateException.class, IllegalArgumentException.class)).getResult(batchRequest::execute);
        } catch(JsonRpcBatchException e) {
            //Even if we have some successes, failure to subscribe for all script hashes will result in outdated wallet view. Don't proceed.
-            throw new ElectrumServerRpcException("Failed to subscribe for updates for paths: " + e.getErrors().keySet(), e);
+            throw new ElectrumServerRpcException("Failed to subscribe to paths: " + getScriptHashesAbbreviation((Collection<String>)e.getErrors().keySet()), e);
        } catch(Exception e) {
-            throw new ElectrumServerRpcException("Failed to subscribe for updates for paths: " + pathScriptHashes.keySet(), e);
+            throw new ElectrumServerRpcException("Failed to subscribe to paths: " + getScriptHashesAbbreviation(pathScriptHashes.keySet()), e);
        }
    }

@@ -151,7 +153,7 @@ public class BatchedElectrumServerRpc implements ElectrumServerRpc {
    public Map<Integer, String> getBlockHeaders(Transport transport, Wallet wallet, Set<Integer> blockHeights) {
        JsonRpcClient client = new JsonRpcClient(transport);
        BatchRequestBuilder<Integer, String> batchRequest = client.createBatchRequest().keysType(Integer.class).returnType(String.class);
-        EventManager.get().post(new WalletHistoryStatusEvent(wallet, true, "Retrieving blocks"));
+        EventManager.get().post(new WalletHistoryStatusEvent(wallet, true, "Retrieving " + blockHeights.size() + " block headers"));

        for(Integer height : blockHeights) {
            batchRequest.add(height, "blockchain.block.header", height);
@@ -162,7 +164,7 @@ public class BatchedElectrumServerRpc implements ElectrumServerRpc {
        } catch(JsonRpcBatchException e) {
            return (Map<Integer, String>)e.getSuccesses();
        } catch(Exception e) {
-            throw new ElectrumServerRpcException("Failed to block headers for block heights: " + blockHeights, e);
+            throw new ElectrumServerRpcException("Failed to retrieve block headers for block heights: " + blockHeights, e);
        }
    }

@@ -171,7 +173,7 @@ public class BatchedElectrumServerRpc implements ElectrumServerRpc {
    public Map<String, String> getTransactions(Transport transport, Wallet wallet, Set<String> txids) {
        JsonRpcClient client = new JsonRpcClient(transport);
        BatchRequestBuilder<String, String> batchRequest = client.createBatchRequest().keysType(String.class).returnType(String.class);
-        EventManager.get().post(new WalletHistoryStatusEvent(wallet, true, "Retrieving transactions"));
+        EventManager.get().post(new WalletHistoryStatusEvent(wallet, true, "Retrieving " + txids.size() + " transactions"));

        for(String txid : txids) {
            batchRequest.add(txid, "blockchain.transaction.get", txid);
@@ -190,7 +192,7 @@ public class BatchedElectrumServerRpc implements ElectrumServerRpc {

            return result;
        } catch(Exception e) {
-            throw new ElectrumServerRpcException("Failed to retrieve transactions for txids: " + txids, e);
+            throw new ElectrumServerRpcException("Failed to retrieve transactions for txids: " + txids.stream().map(txid -> "[" + txid.substring(0, 6) + "]").collect(Collectors.toList()), e);
        }
    }

@@ -235,12 +237,14 @@ public class BatchedElectrumServerRpc implements ElectrumServerRpc {
    public Map<Long, Long> getFeeRateHistogram(Transport transport) {
        try {
            JsonRpcClient client = new JsonRpcClient(transport);
-            Long[][] feesArray = new RetryLogic<Long[][]>(MAX_RETRIES, RETRY_DELAY, IllegalStateException.class).getResult(() ->
-                    client.createRequest().returnAs(Long[][].class).method("mempool.get_fee_histogram").id(idCounter.incrementAndGet()).execute());
+            BigInteger[][] feesArray = new RetryLogic<BigInteger[][]>(MAX_RETRIES, RETRY_DELAY, IllegalStateException.class).getResult(() ->
+                    client.createRequest().returnAs(BigInteger[][].class).method("mempool.get_fee_histogram").id(idCounter.incrementAndGet()).execute());

            Map<Long, Long> feeRateHistogram = new TreeMap<>();
-            for(Long[] feePair : feesArray) {
-                feeRateHistogram.put(feePair[0], feePair[1]);
+            for(BigInteger[] feePair : feesArray) {
+                if(feePair[0].longValue() > 0) {
+                    feeRateHistogram.put(feePair[0].longValue(), feePair[1].longValue());
+                }
            }

            return feeRateHistogram;
@@ -265,11 +269,72 @@ public class BatchedElectrumServerRpc implements ElectrumServerRpc {
        try {
            JsonRpcClient client = new JsonRpcClient(transport);
            return new RetryLogic<String>(MAX_RETRIES, RETRY_DELAY, IllegalStateException.class).getResult(() ->
-                    client.createRequest().returnAs(String.class).method("blockchain.transaction.broadcast").id(idCounter.incrementAndGet()).param("raw_tx", txHex).execute());
+                    client.createRequest().returnAs(String.class).method("blockchain.transaction.broadcast").id(idCounter.incrementAndGet()).params(txHex).execute());
        } catch(JsonRpcException e) {
            throw new ElectrumServerRpcException(e.getErrorMessage().getMessage(), e);
        } catch(Exception e) {
            throw new ElectrumServerRpcException("Error broadcasting transaction", e);
        }
    }
+
+    private static String getScriptHashesAbbreviation(Collection<String> scriptHashes) {
+        List<String> sortedHashes = new ArrayList<>(scriptHashes);
+
+        if(scriptHashes.isEmpty()) {
+            return "[]";
+        }
+
+        List<List<String>> contiguous = splitToContiguous(sortedHashes);
+
+        String abbrev = "[";
+        for(Iterator<List<String>> iter = contiguous.iterator(); iter.hasNext(); ) {
+            List<String> range = iter.next();
+            abbrev += range.get(0);
+            if(range.size() > 1) {
+                abbrev += "-" + range.get(range.size() - 1);
+            }
+            if(iter.hasNext()) {
+                abbrev += ", ";
+            }
+        }
+        abbrev += "]";
+
+        return abbrev;
+    }
+
+    static List<List<String>> splitToContiguous(List<String> input) {
+        List<List<String>> result = new ArrayList<>();
+        int prev = 0;
+
+        int keyPurpose = getKeyPurpose(input.get(0));
+        int index = getIndex(input.get(0));
+
+        for (int cur = 0; cur < input.size(); cur++) {
+            if(getKeyPurpose(input.get(cur)) != keyPurpose || getIndex(input.get(cur)) != index) {
+                result.add(input.subList(prev, cur));
+                prev = cur;
+            }
+            index = getIndex(input.get(cur)) + 1;
+            keyPurpose = getKeyPurpose(input.get(cur));
+        }
+        result.add(input.subList(prev, input.size()));
+
+        return result;
+    }
+
+    private static int getKeyPurpose(String path) {
+        List<ChildNumber> childNumbers = KeyDerivation.parsePath(path);
+        if(childNumbers.isEmpty()) {
+            return -1;
+        }
+        return childNumbers.get(0).num();
+    }
+
+    private static int getIndex(String path) {
+        List<ChildNumber> childNumbers = KeyDerivation.parsePath(path);
+        if(childNumbers.isEmpty()) {
+            return -1;
+        }
+        return childNumbers.get(childNumbers.size() - 1).num();
+    }
 }
--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
Craig Raw	6d8b8579ba	followup	2021-06-16 09:37:35 +02:00
Craig Raw	eaa5190502	various db persistence improvements	2021-06-16 09:35:26 +02:00
Craig Raw	445db6a4d6	reduce file reads on db files to avoid locking exception on windows	2021-06-15 17:58:25 +02:00
Craig Raw	7f178b5f67	jpms related changes for v1.4.2-beta	2021-06-15 16:50:05 +02:00
Craig Raw	1208baf00e	use mempool.space onion address for fee rates if tor proxy enabled	2021-06-15 09:31:12 +02:00
Craig Raw	655a473cd5	update send selected button when freezing or unfreezing utxos	2021-06-14 16:58:05 +02:00
Craig Raw	e6c536930b	highlight default button and allow actioning from keyboard when only one usb device is listed	2021-06-14 16:55:01 +02:00
Craig Raw	f1510de360	update encrypted seeds and private keys when wallet password changes	2021-06-14 14:54:40 +02:00
Craig Raw	cfac2768ae	use varbinary rather than fixed binary column types where length is variable	2021-06-14 11:52:12 +02:00
Craig Raw	ab41f2e80e	upgrade to h2 HEAD	2021-06-11 15:45:16 +02:00
Craig Raw	9ebabecfbe	use json persistence for sparrow wallet export, add sparrow wallet import to wallets dir	2021-06-11 11:29:54 +02:00
Craig Raw	8914acff68	minor followup	2021-06-10 17:02:32 +02:00
Craig Raw	4a0ecba716	add keystone hww import and export	2021-06-10 16:37:41 +02:00
Craig Raw	e99b1d4171	upgrade to hwi 2.0.2 and relocate hwi to sparrow home folder on osx to avoid partial installation deletions in tmpdir	2021-06-10 14:06:14 +02:00
Craig Raw	a59d5d3086	introduce database persistence with automatic migration of existing wallets	2021-06-10 12:08:35 +02:00
Craig Raw	600a77da3a	allow psbts without utxo data to be loaded if utxos are provided in an existing psbt	2021-05-28 11:09:23 +02:00
craigrawandGitHub	bc83f6fa22	Merge pull request #134 from haakonn/mnemonic-entry Make mnemonic entry more efficient	2021-05-27 16:18:39 +02:00
Haakon Nilsen	4cbde7e7aa	When entering mnemonic words, don't close dropdown when a prefix is encountered, and move focus to the next field upon completion	2021-05-27 10:56:47 +02:00
craigrawandGitHub	3ae63408e6	Merge pull request #133 from haakonn/save-tx-menuitems Fixes around transaction saving menu items	2021-05-27 09:58:11 +02:00
Haakon Nilsen	e740c6d162	Disable transaction saving menu items after a transaction tab is closed and no other tabs are open	2021-05-27 09:15:36 +02:00
Haakon Nilsen	f7f5852476	Disable the "Save transaction" menu item when starting app without any open tabs	2021-05-26 18:57:07 +02:00
Haakon Nilsen	447e2ab264	Disable the keyboard shortcut for saving PSBT binary when its parent menu is disabled	2021-05-26 18:54:20 +02:00
craigrawandGitHub	8a77f22158	Merge pull request #132 from haakonn/close-on-escape Close "About" and "Introduction" when Escape key is pressed	2021-05-26 08:39:16 +02:00
Haakon Nilsen	c096327be4	Close "About" and "Introduction" when Escape key is pressed	2021-05-25 22:13:51 +02:00
Craig Raw	911153e1aa	fix receive to address context menu actions	2021-05-25 08:21:17 +02:00
Craig Raw	a60eadf8fc	add export to specter diy	2021-05-24 14:20:08 +02:00
Craig Raw	9ebbf2557f	support electrs batching and improve batching read timeout handling	2021-05-24 13:39:06 +02:00
Craig Raw	42b279d22a	add specter desktop reimport usb wallets warning	2021-05-24 12:29:57 +02:00
Craig Raw	1a452db4cf	add tooltip to send utxos button with directions on how to select multiple utxos	2021-05-24 12:27:30 +02:00
Craig Raw	c1cf5be616	add mempool.bisq.services as a broadcaster, broadcast tx twice if possible on mainnet, handle different network broadcaster network capabilities	2021-05-21 11:48:13 +02:00
Craig Raw	dd146210ba	set send amount to total utxo value when sending selected utxos before an address or label is added	2021-05-21 09:53:00 +02:00
Craig Raw	94088f795c	handle invalid values from mempool.get_fee_histogram	2021-05-21 08:44:55 +02:00
Craig Raw	c5b09189df	explicitly place decorationpane in the scene graph to avoid app resizing issues	2021-05-20 17:27:33 +02:00
Craig Raw	197c44bb07	update null and empty labels, clear script hash cache on increasing gap limit	2021-05-20 14:49:16 +02:00
Craig Raw	c202a941b9	add mempool.emzy.de as another broadcaster	2021-05-20 14:48:01 +02:00
Craig Raw	383594b03c	v1.4.1	2021-05-20 12:32:15 +02:00
Craig Raw	42bfe572ef	calculate and cache script hashes statuses on wallet load to avoid unnecessary initial history fetching	2021-05-20 09:52:02 +02:00
Craig Raw	1677c47500	request payjoin transactions (over tor if available) in background thread	2021-05-19 12:24:46 +02:00
Craig Raw	53a447c72d	fix cpu usage on spreadsheetview	2021-05-19 09:51:55 +02:00
Craig Raw	f23a891ece	add send to many dialog	2021-05-19 08:41:15 +02:00
Craig Raw	0e42c657b3	broadcast transactions over tor to a broadcasting service where tor proxy available	2021-05-18 09:37:59 +02:00
Craig Raw	b17c15f702	request new change address in the transaction diagram	2021-05-17 13:21:56 +02:00
Craig Raw	c9cdf6e77d	handle partial rbf, fix cursor reset on payment label	2021-05-17 11:58:12 +02:00
Craig Raw	4f6ead842d	fix txtree selection bug when preselecting a txi/txo on opening the editor for the first time	2021-05-17 10:53:26 +02:00
Craig Raw	adcddfa84d	various minor utxo screen improvements, including hiding the utxo chart	2021-05-17 10:09:19 +02:00
Craig Raw	d67c5c5218	update related address, tx, txi and txo labels when null, set tx, txi, txo labels to address label on receive, add paste label to context menu	2021-05-14 18:03:46 +02:00
Craig Raw	fb72010bdf	refactor storage to handle different persistence strategies	2021-05-14 12:55:12 +02:00
Craig Raw	8bc8bdb2f2	dont backup wallets outside of wallets folder	2021-05-12 14:52:19 +02:00
Craig Raw	8f4cf9f2a0	add unique4j classes to avoid module dependency issue	2021-05-12 14:28:56 +02:00
Craig Raw	ed323a8388	ensure aopp window is always on top	2021-05-12 09:19:49 +02:00
Craig Raw	d559b437b3	bring window to front one external file load	2021-05-12 09:02:39 +02:00
Craig Raw	6155306acc	always try obtain application lock on startup	2021-05-12 08:46:24 +02:00
Craig Raw	6f35d86890	bring opened file window to foreground	2021-05-11 12:58:11 +02:00
Craig Raw	cbf32a36c6	follow up #2	2021-05-11 12:40:20 +02:00
Craig Raw	9789e0f198	follow up	2021-05-11 12:33:33 +02:00
Craig Raw	574209c837	ensure file and uri opening on original app instance	2021-05-11 12:31:36 +02:00
Craig Raw	74c83fc5e1	fade animation on server toggle while connecting	2021-05-11 08:52:45 +02:00
Craig Raw	a4ddc11bab	Merge branch 'master' of github.com:sparrowwallet/sparrow	2021-05-10 14:34:57 +02:00
Craig Raw	3bf480234f	fix aopp alert dialog on windows	2021-05-10 14:25:16 +02:00
Craig Raw	29811ca5de	handle uri and psbt opening on linux	2021-05-10 14:22:24 +02:00
Craig Raw	b7522420cf	cleanup windows install	2021-05-10 13:41:46 +02:00
Craig Raw	f7d1e22e4e	use custom wix installation file	2021-05-10 13:39:40 +02:00
Craig Raw	e0c38031b1	add aopp registry keys on windows install	2021-05-10 12:17:52 +02:00
Craig Raw	e046512e86	open files or uris from commandline arguments	2021-05-10 11:44:06 +02:00
Craig Raw	7cba0de268	check if opening uris is supported	2021-05-10 08:42:50 +02:00
Craig Raw	425e476f20	add aopp proof of address ownership support	2021-05-07 16:24:28 +02:00
Craig Raw	e5dd33d5a1	register and add bitcoin: uri handler, register aopp: handler	2021-05-06 14:21:56 +02:00
Craig Raw	07012615ff	2nd fix to alert height	2021-05-05 14:59:53 +02:00
Craig Raw	23f3ae51db	hide alert on clicking link	2021-05-05 14:43:33 +02:00
Craig Raw	10514b8039	shorten mitm message to avoid alert height ellipsis	2021-05-05 14:35:43 +02:00
Craig Raw	19637fd706	handle missing webcam dependency on windows showing error alert with link to resolve	2021-05-05 14:31:28 +02:00
Craig Raw	dd56e2b42e	handle windows with owner only file and directory creation	2021-05-05 12:05:48 +02:00
Craig Raw	e0b6530275	only save tmp backup wallet if connected	2021-05-05 11:34:45 +02:00
Craig Raw	a0d3f3b745	ensure config, wallet dirs and wallets are owner read/write only	2021-05-05 11:25:25 +02:00
Craig Raw	438c13fe2d	add wallet transactions loading log viewer, and improve loading messages	2021-05-04 15:17:57 +02:00
Craig Raw	c067300ee8	fix empty addresses table bug after requesting many new addresses	2021-05-04 10:42:18 +02:00
Craig Raw	020ca2f312	always use 8 fraction digits when displaying btc amounts, use a fixed width font for numbers on osx	2021-05-04 10:23:35 +02:00
Craig Raw	5ede1dd97d	ensure wallet export file streams are always closed	2021-04-30 14:03:58 +02:00
Craig Raw	45f6ae214a	add icons to wallet context menu items where they appear as action buttons	2021-04-30 13:19:53 +02:00
Craig Raw	45a9093055	ensure import file stream is closed	2021-04-29 20:58:04 +02:00