rename xPub to xpub

.github/workflows/package.yaml

@@ -0,0 +1,33 @@
+name: Package
+
+on: workflow_dispatch
+
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [windows-latest, ubuntu-latest]
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          submodules: true
+      - name: Set up JDK 14.0.2
+        uses: actions/setup-java@v1
+        with:
+          java-version: 14.0.2
+      - name: Show Build Versions
+        run: ./gradlew -v
+      - name: Cache Gradle packages
+        uses: actions/cache@v2
+        with:
+          path: ~/.gradle/caches
+          key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle') }}
+          restore-keys: ${{ runner.os }}-gradle
+      - name: Build with Gradle
+        run: ./gradlew jpackage
+      - name: Upload Artifacts
+        uses: actions/upload-artifact@v2
+        with:
+          name: Sparrow Build - ${{ runner.os }}
+          path: build/jpackage/*

.gitmodules

@@ -1,3 +1,3 @@
 [submodule "drongo"]
 	path = drongo
-	url = git@github.com:craigraw/drongo.git
+	url = git@github.com:sparrowwallet/drongo.git

LICENSE

@@ -1,19 +1,177 @@
-Copyright (c) 2020 Craig Raw
 
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
 
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
 
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
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+
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+
+   3. Grant of Patent License. Subject to the terms and conditions of
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+      or a Contribution incorporated within the Work constitutes direct
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+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
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+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
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+
+      (d) If the Work includes a "NOTICE" text file as part of its
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+          include a readable copy of the attribution notices contained
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+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
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+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS

README.md

@@ -1,11 +1,73 @@
-# Sparrow
-Bitcoin Wallet & Transaction Editor
+# Sparrow Bitcoin Wallet
 
-To clone this project, use `git clone --recursive git@github.com:craigraw/sparrow.git`
+Sparrow is a modern desktop Bitcoin wallet application supporting most hardware wallets and built on common standards such as PSBT, with an emphasis on transparency and usability.
 
-## Various ways to hex dump a file without spaces:
-`xxd -p file | tr -d '\n'`
+More information (and release binaries) can be found at https://sparrowwallet.com. Release binaries are also available directly from [Github](https://github.com/sparrowwallet/sparrow/releases).
 
-`hexdump -ve '1/1 "%.2x"'`
+![Sparrow Wallet](https://sparrowwallet.com/assets/images/control-your-sends.png)
 
-`od -t x1 -An file | tr -d '\n '`
+## Building
+
+To clone this project, use 
+
+`git clone --recursive git@github.com:sparrowwallet/sparrow.git`
+
+In order to build, Sparrow requires Java 14 to be installed. The release packages can be built using
+
+`./gradlew jpackage`
+
+When updating to the latest HEAD
+
+`git pull --recurse-submodules`
+
+All jar files created are reproducible builds.
+
+## Running
+
+If you prefer to run Sparrow directly from source, it can be launched with
+
+`./sparrow`
+
+Java 14 must be installed.
+
+## Configuration
+
+Sparrow has a number of command line options, for example to change it's home folder or use testnet:
+
+```
+./sparrow -h
+
+Usage: sparrow [options]
+  Options:
+    --dir, -d
+      Path to Sparrow home folder
+    --help, -h
+      Show usage
+    --network, -n
+      Network to use
+      Possible Values: [mainnet, testnet, regtest]
+```
+
+As a fallback, the network (mainnet, testnet or regtest) can also be set using an environment variable `SPARROW_NETWORK`. For example:
+
+`export SPARROW_NETWORK=testnet`
+
+Note that if you are connecting to an Electrum server when using testnet, that server will need to running on testnet configuration as well.
+
+When not explicitly configured using the command line argument above, Sparrow stores it's mainnet config file, log file and wallets in a home folder location appropriate to the operating system:
+
+Platform | Location
+-------- | --------
+OSX      | ~/.sparrow
+Linux    | ~/.sparrow
+Windows  | %APPDATA%/Sparrow
+
+Testnet and regtest configurations (along with their wallets) are stored in subfolders to allow easy switching between networks.
+
+## Reporting Issues
+
+Please use the [Issues](https://github.com/sparrowwallet/sparrow/issues) tab above to report an issue. If possible, look in the sparrow.log file in the configuration directory for information helpful in debugging. 
+
+## License
+
+Sparrow is licensed under the Apache 2 software licence.

build.gradle

@@ -1,23 +1,34 @@
 plugins {
     id 'application'
-    id 'org.openjfx.javafxplugin' version '0.0.8'
+    id 'org.openjfx.javafxplugin' version '0.0.9'
     id 'org.kordamp.gradle.jdeps' version '0.9.0'
-    id 'org.beryx.jlink' version '2.17.4'
+    id 'org.beryx.jlink' version '2.22.0'
 }
 
-group 'com.sparrowwallet'
-version '1.0-SNAPSHOT'
+def sparrowVersion = '0.9.5'
+def os = org.gradle.internal.os.OperatingSystem.current()
+def osName = os.getFamilyName()
+if(os.macOsX) {
+    osName = "osx"
+}
 
-sourceCompatibility = 1.9
+group "com.sparrowwallet"
+version "${sparrowVersion}"
 
 repositories {
     mavenCentral()
     maven { url 'https://oss.sonatype.org/content/groups/public' }
     maven { url 'https://mymavenrepo.com/repo/29EACwkkGcoOKnbx3bxN/' }
+    maven { url 'https://jitpack.io' }
+}
+
+tasks.withType(AbstractArchiveTask) {
+    preserveFileTimestamps = false
+    reproducibleFileOrder = true
 }
 
 javafx {
-    version = "14"
+    version = "15"
     modules = [ 'javafx.controls', 'javafx.fxml', 'javafx.swing', 'javafx.graphics' ]
 }
 
@@ -44,6 +55,7 @@ dependencies {
     implementation('com.github.sarxos:webcam-capture:0.3.13-SNAPSHOT') {
         exclude group: 'com.nativelibs4java', module: 'bridj'
     }
+    implementation("com.sparrowwallet:netlayer-jpms-${osName}:0.6.8")
     implementation('de.codecentric.centerdevice:centerdevice-nsmenufx:2.1.7')
     implementation('org.controlsfx:controlsfx:11.0.2' ) {
         exclude group: 'org.openjfx', module: 'javafx-base'
@@ -62,13 +74,22 @@ mainClassName = 'com.sparrowwallet.sparrow/com.sparrowwallet.sparrow.MainApp'
 compileJava {
     options.with {
         fork = true
-        compilerArgs.addAll(["--add-exports", "org.controlsfx.controls/impl.org.controlsfx.skin=com.sparrowwallet.sparrow"])
+        compilerArgs.addAll(["--add-exports", "org.controlsfx.controls/impl.org.controlsfx.skin=com.sparrowwallet.sparrow",
+                             "--add-exports", "javafx.graphics/com.sun.glass.ui=com.sparrowwallet.sparrow",
+                             "--add-exports", "javafx.graphics/com.sun.javafx.application=com.sparrowwallet.sparrow"])
+    }
+}
+
+processResources {
+    doLast {
+        delete fileTree("$buildDir/resources/main/native").matching {
+            exclude "${osName}/**"
+        }
     }
 }
 
 run {
-    applicationDefaultJvmArgs = ["-Xdock:name=Sparrow", "-Xdock:icon=/Users/scy/git/sparrow/src/main/resources/sparrow.png",
-                                 "--add-opens=javafx.graphics/com.sun.javafx.css=org.controlsfx.controls",
+    applicationDefaultJvmArgs = ["--add-opens=javafx.graphics/com.sun.javafx.css=org.controlsfx.controls",
                                  "--add-opens=javafx.graphics/javafx.scene=org.controlsfx.controls",
                                  "--add-opens=javafx.controls/com.sun.javafx.scene.control.behavior=org.controlsfx.controls",
                                  "--add-opens=javafx.controls/com.sun.javafx.scene.control.inputmap=org.controlsfx.controls",
@@ -81,7 +102,14 @@ run {
                                  "--add-opens=javafx.graphics/com.sun.glass.ui=centerdevice.nsmenufx",
                                  "--add-opens=javafx.controls/com.sun.javafx.scene.control=centerdevice.nsmenufx",
                                  "--add-opens=javafx.graphics/com.sun.javafx.menu=centerdevice.nsmenufx",
-                                 "--add-opens=javafx.graphics/com.sun.glass.ui.mac=centerdevice.nsmenufx"]
+                                 "--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"]
+
+    if(os.macOsX) {
+        applicationDefaultJvmArgs += ["-Xdock:name=Sparrow", "-Xdock:icon=/Users/scy/git/sparrow/src/main/resources/sparrow.png",
+                                      "--add-opens=javafx.graphics/com.sun.glass.ui.mac=centerdevice.nsmenufx"]
+    }
 }
 
 jlink {
@@ -93,6 +121,7 @@ jlink {
         requires 'javafx.base'
         requires 'com.fasterxml.jackson.databind'
         requires 'jdk.crypto.cryptoki'
+        requires 'java.management'
     }
 
     options = ['--strip-debug', '--compress', '2', '--no-header-files', '--no-man-pages', '--ignore-signing-information', '--exclude-files', '**.png']
@@ -111,25 +140,32 @@ jlink {
                    "--add-opens=javafx.graphics/com.sun.glass.ui=com.sparrowwallet.merged.module",
                    "--add-opens=javafx.controls/com.sun.javafx.scene.control=com.sparrowwallet.merged.module",
                    "--add-opens=javafx.graphics/com.sun.javafx.menu=com.sparrowwallet.merged.module",
+                   "--add-opens=javafx.graphics/com.sun.glass.ui=com.sparrowwallet.sparrow",
                    "--add-opens=javafx.graphics/com.sun.glass.ui.mac=com.sparrowwallet.merged.module",
+                   "--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"]
     }
     addExtraDependencies("javafx")
     jpackage {
         imageName = "Sparrow"
         installerName = "Sparrow"
-        appVersion = "0.9.1"
-        skipInstaller = true
+        appVersion = "${sparrowVersion}"
+        skipInstaller = os.macOsX
         imageOptions = []
-        installerOptions = [
-                '--file-associations', 'src/main/resources/associations.properties',
-        ]
-        if (org.gradle.internal.os.OperatingSystem.current().windows) {
-            installerOptions += ['--win-per-user-install', '--win-dir-chooser', '--win-menu']
+        installerOptions = ['--file-associations', 'src/main/deploy/associations.properties', '--license-file', 'LICENSE']
+        if(os.windows) {
+            installerOptions += ['--win-per-user-install', '--win-dir-chooser', '--win-menu', '--win-shortcut']
+            imageOptions += ['--icon', 'src/main/deploy/package/windows/sparrow.ico']
+            installerType = "exe"
         }
-        if (org.gradle.internal.os.OperatingSystem.current().macOsX) {
+        if(os.linux) {
+            installerOptions += ['--resource-dir', 'src/main/deploy/package/linux/', '--linux-shortcut', '--linux-rpm-license-type', 'ASL 2.0']
+            imageOptions += ['--icon', 'src/main/deploy/package/linux/Sparrow.png', '--resource-dir', 'src/main/deploy/package/linux/']
+        }
+        if(os.macOsX) {
             installerOptions += ['--mac-sign', '--mac-signing-key-user-name', 'Craig Raw (UPLVMSK9D7)']
-            imageOptions += ['--icon', 'src/main/deploy/package/macosx/sparrow.icns', '--resource-dir', 'src/main/deploy/package/macosx/']
+            imageOptions += ['--icon', 'src/main/deploy/package/osx/sparrow.icns', '--resource-dir', 'src/main/deploy/package/osx/']
             installerType = "dmg"
         }
     }

sparrow

@@ -0,0 +1,11 @@
+#!/usr/bin/env sh
+
+args="$*"
+args="${args%"${args##*[![:space:]]}"}"
+
+if [ -n "$args" ]
+then
+  ./gradlew run --args="$args"
+else
+  ./gradlew run
+fi

sparrow.bat

@@ -0,0 +1,8 @@
+@echo off
+set ARGS=%*
+
+if "%ARGS%" == "" (
+    gradlew.bat run    
+) else (
+	gradlew.bat run --args="%ARGS%"
+)

src/main/deploy/package/osx/Info.plist

@@ -21,7 +21,7 @@
   <key>CFBundlePackageType</key>
   <string>APPL</string>
   <key>CFBundleShortVersionString</key>
-  <string>0.6</string>
+  <string>0.9.5</string>
   <key>CFBundleSignature</key>
   <string>????</string>
   <!-- See https://developer.apple.com/app-store/categories/ for list of AppStore categories -->

src/main/java/com/sparrowwallet/sparrow/AboutController.java

@@ -1,11 +1,20 @@
 package com.sparrowwallet.sparrow;
 
 import javafx.event.ActionEvent;
+import javafx.fxml.FXML;
+import javafx.scene.control.Label;
 import javafx.stage.Stage;
 
 public class AboutController {
     private Stage stage;
 
+    @FXML
+    private Label title;
+
+    public void initializeView() {
+        title.setText(MainApp.APP_NAME + " " + MainApp.APP_VERSION);
+    }
+
     public void setStage(Stage stage) {
         this.stage = stage;
     }

src/main/java/com/sparrowwallet/sparrow/AppController.java

@@ -4,6 +4,7 @@ import com.google.common.base.Charsets;
 import com.google.common.eventbus.Subscribe;
 import com.google.common.io.ByteSource;
 import com.sparrowwallet.drongo.BitcoinUnit;
+import com.sparrowwallet.drongo.Network;
 import com.sparrowwallet.drongo.SecureString;
 import com.sparrowwallet.drongo.Utils;
 import com.sparrowwallet.drongo.crypto.InvalidPasswordException;
@@ -19,6 +20,7 @@ import com.sparrowwallet.sparrow.control.*;
 import com.sparrowwallet.sparrow.event.*;
 import com.sparrowwallet.sparrow.io.*;
 import com.sparrowwallet.sparrow.net.ElectrumServer;
+import com.sparrowwallet.sparrow.net.VersionCheckService;
 import com.sparrowwallet.sparrow.preferences.PreferencesDialog;
 import com.sparrowwallet.sparrow.transaction.TransactionController;
 import com.sparrowwallet.sparrow.transaction.TransactionData;
@@ -46,6 +48,7 @@ import javafx.scene.image.ImageView;
 import javafx.scene.input.Dragboard;
 import javafx.scene.input.TransferMode;
 import javafx.scene.layout.StackPane;
+import javafx.scene.text.Font;
 import javafx.stage.FileChooser;
 import javafx.stage.Stage;
 import javafx.stage.StageStyle;
@@ -69,8 +72,8 @@ public class AppController implements Initializable {
 
     private static final int SERVER_PING_PERIOD = 10 * 1000;
     private static final int ENUMERATE_HW_PERIOD = 30 * 1000;
-
     private static final int RATES_PERIOD = 5 * 60 * 1000;
+    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");
 
@@ -87,12 +90,18 @@ public class AppController implements Initializable {
     @FXML
     private Menu fileMenu;
 
+    @FXML
+    private Menu helpMenu;
+
     @FXML
     private MenuItem openTransactionIdItem;
 
     @FXML
     private ToggleGroup bitcoinUnit;
 
+    @FXML
+    private ToggleGroup theme;
+
     @FXML
     private CheckMenuItem showTxHex;
 
@@ -121,12 +130,16 @@ public class AppController implements Initializable {
 
     private Hwi.ScheduledEnumerateService deviceEnumerateService;
 
+    private VersionCheckService versionCheckService;
+
     private static Integer currentBlockHeight;
 
     public static boolean showTxHexProperty;
 
     private static Map<Integer, Double> targetBlockFeeRates;
 
+    private static Double minimumRelayFeeRate;
+
     private static CurrencyRate fiatCurrencyExchangeRate;
 
     private static List<Device> devices;
@@ -182,7 +195,8 @@ public class AppController implements Initializable {
             }
         });
 
-        tabs.setTabDragPolicy(TabPane.TabDragPolicy.REORDER);
+        //Draggle tabs introduce unwanted movement when selecting between them
+        //tabs.setTabDragPolicy(TabPane.TabDragPolicy.REORDER);
         tabs.getTabs().addListener((ListChangeListener<Tab>) c -> {
             if(c.next() && (c.wasAdded() || c.wasRemoved())) {
                 boolean walletAdded = c.getAddedSubList().stream().anyMatch(tab -> ((TabData)tab.getUserData()).getType() == TabData.TabType.WALLET);
@@ -216,8 +230,18 @@ public class AppController implements Initializable {
             Config.get().setBitcoinUnit(unit);
         }
         final BitcoinUnit selectedUnit = unit;
-        Optional<Toggle> selectedToggle = bitcoinUnit.getToggles().stream().filter(toggle -> selectedUnit.equals(toggle.getUserData())).findFirst();
-        selectedToggle.ifPresent(toggle -> bitcoinUnit.selectToggle(toggle));
+        Optional<Toggle> selectedUnitToggle = bitcoinUnit.getToggles().stream().filter(toggle -> selectedUnit.equals(toggle.getUserData())).findFirst();
+        selectedUnitToggle.ifPresent(toggle -> bitcoinUnit.selectToggle(toggle));
+
+        Theme configTheme = Config.get().getTheme();
+        if(configTheme == null) {
+            configTheme = Theme.LIGHT;
+            Config.get().setTheme(Theme.LIGHT);
+        }
+        final Theme selectedTheme = configTheme;
+        Optional<Toggle> selectedThemeToggle = theme.getToggles().stream().filter(toggle -> selectedTheme.equals(toggle.getUserData())).findFirst();
+        selectedThemeToggle.ifPresent(toggle -> theme.selectToggle(toggle));
+        setTheme(null);
 
         showTxHex.setSelected(true);
         showTxHexProperty = true;
@@ -242,15 +266,26 @@ public class AppController implements Initializable {
                     if(!ratesService.isRunning() && ratesService.getExchangeSource() != ExchangeSource.NONE) {
                         ratesService.start();
                     }
+
+                    if(versionCheckService.getState() == Worker.State.CANCELLED) {
+                        versionCheckService.reset();
+                    }
+
+                    if(!versionCheckService.isRunning() && Config.get().isCheckNewVersions()) {
+                        versionCheckService.start();
+                    }
                 } else {
                     connectionService.cancel();
                     ratesService.cancel();
+                    versionCheckService.cancel();
                 }
             }
         });
 
         onlineProperty.bindBidirectional(serverToggle.selectedProperty());
-        onlineProperty().addListener((observable, oldValue, newValue) -> serverToggle.setTooltip(new Tooltip(newValue ? "Connected to " + Config.get().getElectrumServer() : "Disconnected")));
+        onlineProperty().addListener((observable, oldValue, newValue) ->  {
+            Platform.runLater(this::setServerToggleTooltip);
+        });
 
         Config config = Config.get();
         connectionService = createConnectionService();
@@ -261,10 +296,15 @@ public class AppController implements Initializable {
         ExchangeSource source = config.getExchangeSource() != null ? config.getExchangeSource() : DEFAULT_EXCHANGE_SOURCE;
         Currency currency = config.getFiatCurrency() != null ? config.getFiatCurrency() : DEFAULT_FIAT_CURRENCY;
         ratesService = createRatesService(source, currency);
-        if (config.getMode() == Mode.ONLINE && source != ExchangeSource.NONE) {
+        if(config.getMode() == Mode.ONLINE && source != ExchangeSource.NONE) {
             ratesService.start();
         }
 
+        versionCheckService = createVersionCheckService();
+        if(config.getMode() == Mode.ONLINE && config.isCheckNewVersions()) {
+            versionCheckService.start();
+        }
+
         openTransactionIdItem.disableProperty().bind(onlineProperty.not());
     }
 
@@ -273,6 +313,13 @@ public class AppController implements Initializable {
         connectionService.setPeriod(new Duration(SERVER_PING_PERIOD));
         connectionService.setRestartOnFailure(true);
 
+        EventManager.get().register(connectionService);
+        connectionService.statusProperty().addListener((observable, oldValue, newValue) -> {
+            if(connectionService.isRunning()) {
+                EventManager.get().post(new StatusEvent(newValue));
+            }
+        });
+
         connectionService.setOnSucceeded(successEvent -> {
             changeMode = false;
             onlineProperty.setValue(true);
@@ -309,6 +356,22 @@ public class AppController implements Initializable {
         return ratesService;
     }
 
+    private VersionCheckService createVersionCheckService() {
+        VersionCheckService versionCheckService = new VersionCheckService();
+        versionCheckService.setDelay(Duration.seconds(10));
+        versionCheckService.setPeriod(Duration.hours(VERSION_CHECK_PERIOD_HOURS));
+        versionCheckService.setRestartOnFailure(true);
+
+        versionCheckService.setOnSucceeded(successEvent -> {
+            VersionUpdatedEvent event = versionCheckService.getValue();
+            if(event != null) {
+                EventManager.get().post(event);
+            }
+        });
+
+        return versionCheckService;
+    }
+
     private Hwi.ScheduledEnumerateService createDeviceEnumerateService() {
         Hwi.ScheduledEnumerateService enumerateService = new Hwi.ScheduledEnumerateService(null);
         enumerateService.setPeriod(new Duration(ENUMERATE_HW_PERIOD));
@@ -333,7 +396,7 @@ public class AppController implements Initializable {
     }
 
     private void setOsxApplicationMenu() {
-        if(org.controlsfx.tools.Platform.getCurrent().getPlatformId().toLowerCase().equals("mac")) {
+        if(org.controlsfx.tools.Platform.getCurrent() == org.controlsfx.tools.Platform.OSX) {
             MenuToolkit tk = MenuToolkit.toolkit();
             MenuItem preferences = new MenuItem("Preferences...");
             preferences.setOnAction(this::openPreferences);
@@ -343,10 +406,16 @@ public class AppController implements Initializable {
                     tk.createQuitMenuItem(MainApp.APP_NAME));
             tk.setApplicationMenu(defaultApplicationMenu);
 
-            fileMenu.getItems().removeIf(item -> item.getStyleClass().contains("macHide"));
+            fileMenu.getItems().removeIf(item -> item.getStyleClass().contains("osxHide"));
+            helpMenu.getItems().removeIf(item -> item.getStyleClass().contains("osxHide"));
         }
     }
 
+    public void showAbout(ActionEvent event) {
+        Stage aboutStage = getAboutStage();
+        aboutStage.show();
+    }
+
     private Stage getAboutStage() {
         try {
             FXMLLoader loader = new FXMLLoader(AppController.class.getResource("about.fxml"));
@@ -354,11 +423,13 @@ public class AppController implements Initializable {
             AboutController controller = loader.getController();
 
             Stage stage = new Stage();
-            stage.setTitle("About Sparrow");
-            stage.initStyle(StageStyle.UNDECORATED);
+            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));
             controller.setStage(stage);
+            controller.initializeView();
+            setStageIcon(stage);
 
             return stage;
         } catch(IOException e) {
@@ -472,7 +543,8 @@ public class AppController implements Initializable {
             transactionReferenceService.setOnFailed(failEvent -> {
                 Platform.runLater(() -> {
                     Throwable e = failEvent.getSource().getException();
-                    showErrorDialog("Error fetching transaction", e.getCause() != null ? e.getCause().getMessage() : e.getMessage());
+                    log.error("Error fetching transaction " + txId.toString(), e);
+                    showErrorDialog("Error fetching transaction", "The server returned an error when fetching the transaction. The server response is contained in sparrow.log");
                 });
             });
             transactionReferenceService.start();
@@ -574,6 +646,10 @@ public class AppController implements Initializable {
         return targetBlockFeeRates;
     }
 
+    public static Double getMinimumRelayFeeRate() {
+        return minimumRelayFeeRate;
+    }
+
     public static CurrencyRate getFiatCurrencyExchangeRate() {
         return fiatCurrencyExchangeRate;
     }
@@ -598,12 +674,27 @@ public class AppController implements Initializable {
 
     public static void showErrorDialog(String title, String content) {
         Alert alert = new Alert(Alert.AlertType.ERROR);
+        setStageIcon(alert.getDialogPane().getScene().getWindow());
+        alert.getDialogPane().getScene().getStylesheets().add(AppController.class.getResource("general.css").toExternalForm());
         alert.setTitle(title);
         alert.setHeaderText(title);
         alert.setContentText(content);
         alert.showAndWait();
     }
 
+    public static void setStageIcon(Window window) {
+        Stage stage = (Stage)window;
+        stage.getIcons().add(new Image(AppController.class.getResourceAsStream("/image/sparrow.png")));
+
+        if(stage.getScene() != null && Config.get().getTheme() == Theme.DARK) {
+            stage.getScene().getStylesheets().add(AppController.class.getResource("darktheme.css").toExternalForm());
+        }
+    }
+
+    public static Font getMonospaceFont() {
+        return Font.font("Roboto Mono", 13);
+    }
+
     public void selectTab(Wallet wallet) {
         for(Tab tab : tabs.getTabs()) {
             TabData tabData = (TabData) tab.getUserData();
@@ -646,6 +737,10 @@ public class AppController implements Initializable {
         return FileType.JSON.equals(fileType) || FileType.BINARY.equals(fileType);
     }
 
+    private void setServerToggleTooltip() {
+        serverToggle.setTooltip(new Tooltip(isOnline() ? "Connected to " + Config.get().getElectrumServer() + (getCurrentBlockHeight() != null ? " at height " + getCurrentBlockHeight() : "") : "Disconnected"));
+    }
+
     public void newWallet(ActionEvent event) {
         WalletNameDialog dlg = new WalletNameDialog();
         Optional<String> walletName = dlg.showAndWait();
@@ -676,7 +771,11 @@ public class AppController implements Initializable {
             FileType fileType = IOUtils.getFileType(file);
             if(FileType.JSON.equals(fileType)) {
                 Wallet wallet = storage.loadWallet();
+                checkWalletNetwork(wallet);
                 restorePublicKeysFromSeed(wallet, null);
+                if(!wallet.isValid()) {
+                    throw new IllegalStateException("Wallet file is not valid.");
+                }
                 Tab tab = addWalletTab(storage, wallet);
                 tabs.getSelectionModel().select(tab);
             } else if(FileType.BINARY.equals(fileType)) {
@@ -692,10 +791,11 @@ public class AppController implements Initializable {
                     EventManager.get().post(new StorageEvent(storage.getWalletFile(), TimedEvent.Action.END, "Done"));
                     Storage.WalletAndKey walletAndKey = loadWalletService.getValue();
                     try {
+                        checkWalletNetwork(walletAndKey.wallet);
                         restorePublicKeysFromSeed(walletAndKey.wallet, walletAndKey.key);
                         Tab tab = addWalletTab(storage, walletAndKey.wallet);
                         tabs.getSelectionModel().select(tab);
-                    } catch(MnemonicException e) {
+                    } catch(Exception e) {
                         showErrorDialog("Error Opening Wallet", e.getMessage());
                     } finally {
                         walletAndKey.key.clear();
@@ -707,8 +807,11 @@ public class AppController implements Initializable {
                     if(exception instanceof InvalidPasswordException) {
                         showErrorDialog("Invalid Password", "The wallet password was invalid.");
                     } else {
-                        log.error("Error Opening Wallet", exception);
-                        showErrorDialog("Error Opening Wallet", exception.getMessage());
+                        if(!attemptImportWallet(file, password)) {
+                            log.error("Error Opening Wallet", exception);
+                            showErrorDialog("Error Opening Wallet", exception.getMessage() == null ? "Unsupported file format" : exception.getMessage());
+                        }
+                        password.clear();
                     }
                 });
                 EventManager.get().post(new StorageEvent(storage.getWalletFile(), TimedEvent.Action.START, "Decrypting wallet..."));
@@ -717,8 +820,16 @@ public class AppController implements Initializable {
                 throw new IOException("Unsupported file type");
             }
         } catch(Exception e) {
-            log.error("Error opening wallet", e);
-            showErrorDialog("Error Opening Wallet", e.getMessage());
+            if(!attemptImportWallet(file, null)) {
+                log.error("Error opening wallet", e);
+                showErrorDialog("Error Opening Wallet", e.getMessage() == null ? "Unsupported file format" : e.getMessage());
+            }
+        }
+    }
+
+    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.");
         }
     }
 
@@ -769,13 +880,67 @@ public class AppController implements Initializable {
         Optional<Wallet> optionalWallet = dlg.showAndWait();
         if(optionalWallet.isPresent()) {
             Wallet wallet = optionalWallet.get();
-            File walletFile = Storage.getWalletFile(wallet.getName());
-            Storage storage = new Storage(walletFile);
-            Tab tab = addWalletTab(storage, wallet);
-            tabs.getSelectionModel().select(tab);
+            addImportedWallet(wallet);
         }
     }
 
+    private boolean attemptImportWallet(File file, SecureString password) {
+        List<WalletImport> walletImporters = List.of(new ColdcardSinglesig(), new ColdcardMultisig(), new Electrum(), new Specter(), new CoboVaultSinglesig(), new CoboVaultMultisig());
+        for(WalletImport importer : walletImporters) {
+            try(FileInputStream inputStream = new FileInputStream(file)) {
+                if(importer.isEncrypted(file) && password == null) {
+                    WalletPasswordDialog dlg = new WalletPasswordDialog(file.getName(), WalletPasswordDialog.PasswordRequirement.LOAD);
+                    Optional<SecureString> optionalPassword = dlg.showAndWait();
+                    if(optionalPassword.isPresent()) {
+                        password = optionalPassword.get();
+                    }
+                }
+
+                Wallet wallet = importer.importWallet(inputStream, password == null ? null: password.asString());
+                if(wallet.getName() == null) {
+                    wallet.setName(file.getName());
+                }
+                addImportedWallet(wallet);
+                return true;
+            } catch(Exception e) {
+                //ignore
+            }
+        }
+
+        return false;
+    }
+
+    private void addImportedWallet(Wallet wallet) {
+        File walletFile = Storage.getWalletFile(wallet.getName());
+
+        if(walletFile.exists()) {
+            Alert alert = new Alert(Alert.AlertType.CONFIRMATION);
+            alert.setTitle("Existing wallet found");
+            alert.setHeaderText("Replace existing wallet?");
+            alert.setContentText("Wallet file " + wallet.getName() + " already exists");
+            Optional<ButtonType> result = alert.showAndWait();
+            if(result.isPresent() && result.get() == ButtonType.CANCEL) {
+                return;
+            }
+
+            //Close existing wallet first if open
+            for(Iterator<Tab> iter = tabs.getTabs().iterator(); iter.hasNext(); ) {
+                Tab tab = iter.next();
+                TabData tabData = (TabData)tab.getUserData();
+                if(tabData.getType() == TabData.TabType.WALLET) {
+                    WalletTabData walletTabData = (WalletTabData) tabData;
+                    if(walletTabData.getStorage().getWalletFile().equals(walletFile)) {
+                        iter.remove();
+                    }
+                }
+            }
+        }
+
+        Storage storage = new Storage(walletFile);
+        Tab tab = addWalletTab(storage, wallet);
+        tabs.getSelectionModel().select(tab);
+    }
+
     public void exportWallet(ActionEvent event) {
         Tab selectedTab = tabs.getSelectionModel().getSelectedItem();
         TabData tabData = (TabData)selectedTab.getUserData();
@@ -794,7 +959,38 @@ public class AppController implements Initializable {
         preferencesDialog.showAndWait();
     }
 
+    public void signVerifyMessage(ActionEvent event) {
+        MessageSignDialog messageSignDialog = null;
+        Tab tab = tabs.getSelectionModel().getSelectedItem();
+        if(tab != null && tab.getUserData() instanceof WalletTabData) {
+            WalletTabData walletTabData = (WalletTabData)tab.getUserData();
+            Wallet wallet = walletTabData.getWallet();
+            if(wallet.getKeystores().size() == 1 &&
+                    (wallet.getKeystores().get(0).hasSeed() || wallet.getKeystores().get(0).getSource() == KeystoreSource.HW_USB)) {
+                //Can sign and verify
+                messageSignDialog = new MessageSignDialog(wallet);
+            }
+        }
+
+        if(messageSignDialog == null) {
+            //Can verify only
+            messageSignDialog = new MessageSignDialog();
+        }
+
+        messageSignDialog.showAndWait();
+    }
+
     public Tab addWalletTab(Storage storage, Wallet wallet) {
+        for(Tab tab : tabs.getTabs()) {
+            TabData tabData = (TabData)tab.getUserData();
+            if(tabData.getType() == TabData.TabType.WALLET) {
+                WalletTabData walletTabData = (WalletTabData) tabData;
+                if(storage.getWalletFile().equals(walletTabData.getStorage().getWalletFile())) {
+                    return tab;
+                }
+            }
+        }
+
         try {
             String name = storage.getWalletFile().getName();
             if(name.endsWith(".json")) {
@@ -967,6 +1163,19 @@ public class AppController implements Initializable {
         return contextMenu;
     }
 
+    public void setTheme(ActionEvent event) {
+        Theme selectedTheme = (Theme)theme.getSelectedToggle().getUserData();
+        if(Config.get().getTheme() != selectedTheme) {
+            Config.get().setTheme(selectedTheme);
+        }
+
+        if(selectedTheme == Theme.DARK) {
+            tabs.getScene().getStylesheets().add(getClass().getResource("darktheme.css").toExternalForm());
+        } else {
+            tabs.getScene().getStylesheets().remove(getClass().getResource("darktheme.css").toExternalForm());
+        }
+    }
+
     @Subscribe
     public void tabSelected(TabSelectedEvent event) {
         String tabName = event.getTabName();
@@ -1032,11 +1241,11 @@ public class AppController implements Initializable {
                 text += event.getValueAsText(event.getTotalValue());
             } else {
                 if(event.getTotalBlockchainValue() > 0 && event.getTotalMempoolValue() > 0) {
-                    text = "New transactions: " + event.getValueAsText(event.getTotalValue()) + " (" + event.getValueAsText(event.getTotalMempoolValue())  + " in mempool)";
+                    text = "New transactions: " + event.getValueAsText(event.getTotalValue()) + " total (" + event.getValueAsText(event.getTotalMempoolValue())  + " in mempool)";
                 } else if(event.getTotalMempoolValue() > 0) {
-                    text = "New mempool transactions: " + event.getValueAsText(event.getTotalMempoolValue());
+                    text = "New mempool transactions: " + event.getValueAsText(event.getTotalMempoolValue()) + " total";
                 } else {
-                    text = "New transactions: " + event.getValueAsText(event.getTotalValue());
+                    text = "New transactions: " + event.getValueAsText(event.getTotalValue()) + " total";
                 }
             }
 
@@ -1070,7 +1279,7 @@ public class AppController implements Initializable {
     public void statusUpdated(StatusEvent event) {
         statusBar.setText(event.getStatus());
 
-        PauseTransition wait = new PauseTransition(Duration.seconds(10));
+        PauseTransition wait = new PauseTransition(Duration.seconds(20));
         wait.setOnFinished((e) -> {
             if(statusBar.getText().equals(event.getStatus())) {
                 statusBar.setText("");
@@ -1079,6 +1288,20 @@ public class AppController implements Initializable {
         wait.play();
     }
 
+    @Subscribe
+    public void versionUpdated(VersionUpdatedEvent event) {
+        Hyperlink versionUpdateLabel = new Hyperlink("Sparrow " + event.getVersion() + " available");
+        versionUpdateLabel.setOnAction(event1 -> {
+            application.getHostServices().showDocument("https://www.sparrowwallet.com/download");
+        });
+
+        if(statusBar.getRightItems().size() > 0 && statusBar.getRightItems().get(0) instanceof Hyperlink) {
+            statusBar.getRightItems().remove(0);
+        }
+
+        statusBar.getRightItems().add(0, versionUpdateLabel);
+    }
+
     @Subscribe
     public void timedWorker(TimedEvent event) {
         if(event.getTimeMills() == 0) {
@@ -1122,7 +1345,7 @@ public class AppController implements Initializable {
         } else {
             if(usbStatus == null) {
                 usbStatus = new UsbStatusButton();
-                statusBar.getRightItems().add(0, usbStatus);
+                statusBar.getRightItems().add(Math.max(statusBar.getRightItems().size() - 1, 0), usbStatus);
             } else {
                 usbStatus.getItems().remove(0, usbStatus.getItems().size());
             }
@@ -1135,8 +1358,9 @@ public class AppController implements Initializable {
     public void newConnection(ConnectionEvent event) {
         currentBlockHeight = event.getBlockHeight();
         targetBlockFeeRates = event.getTargetBlockFeeRates();
+        minimumRelayFeeRate = event.getMinimumRelayFeeRate();
         String banner = event.getServerBanner();
-        String status = "Connected: " + (banner == null ? "Server" : banner.split(System.lineSeparator(), 2)[0]) + " at height " + event.getBlockHeight();
+        String status = "Connected to " + Config.get().getElectrumServer() + " at height " + event.getBlockHeight();
         EventManager.get().post(new StatusEvent(status));
     }
 
@@ -1150,6 +1374,7 @@ public class AppController implements Initializable {
     @Subscribe
     public void newBlock(NewBlockEvent event) {
         currentBlockHeight = event.getHeight();
+        setServerToggleTooltip();
         String status = "Updating to new block height " + event.getHeight();
         EventManager.get().post(new StatusEvent(status));
     }
@@ -1192,9 +1417,19 @@ public class AppController implements Initializable {
         fiatCurrencyExchangeRate = event.getCurrencyRate();
     }
 
+    @Subscribe
+    public void versionCheckStatus(VersionCheckStatusEvent event) {
+        versionCheckService.cancel();
+
+        if(Config.get().getMode() != Mode.OFFLINE && event.isEnabled()) {
+            versionCheckService = createVersionCheckService();
+            versionCheckService.start();
+        }
+    }
+
     @Subscribe
     public void openWallets(OpenWalletsEvent event) {
-        List<File> walletFiles = event.getWalletsMap().values().stream().map(storage -> storage.getWalletFile()).collect(Collectors.toList());
+        List<File> walletFiles = event.getWalletsMap().values().stream().map(Storage::getWalletFile).collect(Collectors.toList());
         Config.get().setRecentWalletFiles(walletFiles);
 
         boolean usbWallet = false;

src/main/java/com/sparrowwallet/sparrow/Args.java

@@ -0,0 +1,15 @@
+package com.sparrowwallet.sparrow;
+
+import com.beust.jcommander.Parameter;
+import com.sparrowwallet.drongo.Network;
+
+public class Args {
+    @Parameter(names = { "--dir", "-d" }, description = "Path to Sparrow home folder")
+    public String dir;
+
+    @Parameter(names = { "--network", "-n" }, description = "Network to use")
+    public Network network;
+
+    @Parameter(names = { "--help", "-h" }, description = "Show usage", help = true)
+    public boolean help;
+}

src/main/java/com/sparrowwallet/sparrow/BaseController.java

@@ -1,6 +1,9 @@
 package com.sparrowwallet.sparrow;
 
+import com.sparrowwallet.drongo.policy.PolicyType;
 import com.sparrowwallet.drongo.protocol.ScriptChunk;
+import com.sparrowwallet.drongo.wallet.Keystore;
+import com.sparrowwallet.sparrow.control.DescriptorArea;
 import com.sparrowwallet.sparrow.control.ScriptArea;
 import javafx.geometry.Point2D;
 import javafx.scene.control.Label;
@@ -39,4 +42,42 @@ public abstract class BaseController {
     protected String describeScriptChunk(ScriptChunk chunk) {
         return chunk.toString();
     }
+
+    protected void initializeDescriptorField(DescriptorArea descriptorArea) {
+        Popup popup = new Popup();
+        Label popupMsg = new Label();
+        popupMsg.getStyleClass().add("tooltip");
+        popup.getContent().add(popupMsg);
+
+        descriptorArea.setMouseOverTextDelay(Duration.ofMillis(150));
+        descriptorArea.addEventHandler(MouseOverTextEvent.MOUSE_OVER_TEXT_BEGIN, e -> {
+            TwoDimensional.Position position = descriptorArea.getParagraph(0).getStyleSpans().offsetToPosition(e.getCharacterIndex(), Backward);
+            int index = descriptorArea.getWallet().getPolicyType() == PolicyType.SINGLE ? position.getMajor() - 1 : ((position.getMajor() - 1) / 2);
+            if(position.getMajor() > 0 && index >= 0 && index < descriptorArea.getWallet().getKeystores().size()) {
+                Keystore hoverKeystore = descriptorArea.getWallet().getKeystores().get(index);
+                Point2D pos = e.getScreenPosition();
+                popupMsg.setText(describeKeystore(hoverKeystore));
+                popup.show(descriptorArea, pos.getX(), pos.getY() + 10);
+            }
+        });
+        descriptorArea.addEventHandler(MouseOverTextEvent.MOUSE_OVER_TEXT_END, e -> {
+            popup.hide();
+        });
+    }
+
+    protected String describeKeystore(Keystore keystore) {
+        if(keystore.isValid()) {
+            StringBuilder builder = new StringBuilder();
+            builder.append("[");
+            builder.append(keystore.getKeyDerivation().getMasterFingerprint());
+            builder.append("/");
+            builder.append(keystore.getKeyDerivation().getDerivationPath().replaceFirst("^m?/", ""));
+            builder.append("]");
+            builder.append(keystore.getExtendedPublicKey().toString());
+
+            return builder.toString();
+        }
+
+        return "Invalid";
+    }
 }

src/main/java/com/sparrowwallet/sparrow/MainApp.java

@@ -1,9 +1,13 @@
 package com.sparrowwallet.sparrow;
 
+import com.beust.jcommander.JCommander;
+import com.sparrowwallet.drongo.Network;
 import com.sparrowwallet.sparrow.control.WelcomeDialog;
 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.preferences.PreferenceGroup;
 import com.sparrowwallet.sparrow.preferences.PreferencesDialog;
 import javafx.application.Application;
@@ -12,24 +16,39 @@ import javafx.fxml.FXMLLoader;
 import javafx.scene.Parent;
 import javafx.scene.Scene;
 import javafx.scene.image.Image;
+import javafx.scene.text.Font;
 import javafx.stage.Stage;
 import org.controlsfx.glyphfont.GlyphFontRegistry;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 import java.io.File;
-import java.util.List;
-import java.util.Optional;
+import java.util.*;
+import java.util.stream.Collectors;
 
 public class MainApp extends Application {
+    private static final Logger log = LoggerFactory.getLogger(MainApp.class);
+
     public static final String APP_NAME = "Sparrow";
+    public static final String APP_VERSION = "0.9.5";
+    public static final String APP_HOME_PROPERTY = "sparrow.home";
+    public static final String NETWORK_ENV_PROPERTY = "SPARROW_NETWORK";
 
     private Stage mainStage;
 
+    @Override
+    public void init() throws Exception {
+        Thread.setDefaultUncaughtExceptionHandler((t, e) -> LoggerFactory.getLogger(MainApp.class).error("Exception in thread \"" + t.getName() + "\"", e));
+        super.init();
+    }
+
     @Override
     public void start(Stage stage) throws Exception {
         this.mainStage = stage;
 
         GlyphFontRegistry.register(new FontAwesome5());
         GlyphFontRegistry.register(new FontAwesome5Brands());
+        Font.loadFont(AppController.class.getResourceAsStream("/font/RobotoMono-Regular.ttf"), 13);
 
         boolean createNewWallet = false;
         Mode mode = Config.get().getMode();
@@ -72,7 +91,14 @@ public class MainApp extends Application {
 
         List<File> recentWalletFiles = Config.get().getRecentWalletFiles();
         if(recentWalletFiles != null) {
-            for(File walletFile : recentWalletFiles) {
+            //Resort 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);
+            List<File> sortedWalletFiles = new ArrayList<>(recentWalletFiles);
+            sortedWalletFiles.removeAll(encryptedWalletFiles);
+            sortedWalletFiles.addAll(encryptedWalletFiles);
+
+            for(File walletFile : sortedWalletFiles) {
                 if(walletFile.exists()) {
                     Platform.runLater(() -> appController.openWalletFile(walletFile));
                 }
@@ -85,7 +111,37 @@ public class MainApp extends Application {
         mainStage.close();
     }
 
-    public static void main(String[] args) {
-        launch(args);
+    public static void main(String[] argv) {
+        Args args = new Args();
+        JCommander jCommander = JCommander.newBuilder().addObject(args).programName(APP_NAME.toLowerCase()).acceptUnknownOptions(true).build();
+        jCommander.parse(argv);
+        if(args.help) {
+            jCommander.usage();
+            System.exit(0);
+        }
+
+        if(args.dir != null) {
+            log.info("Using configured Sparrow home folder of " + args.dir);
+            System.setProperty(APP_HOME_PROPERTY, args.dir);
+        }
+
+        if(args.network != null) {
+            Network.set(args.network);
+        } else {
+            String envNetwork = System.getenv(NETWORK_ENV_PROPERTY);
+            if(envNetwork != null) {
+                try {
+                    Network.set(Network.valueOf(envNetwork.toUpperCase()));
+                } catch(Exception e) {
+                    log.warn("Invalid " + NETWORK_ENV_PROPERTY + " property: " + envNetwork);
+                }
+            }
+        }
+
+        if(Network.get() != Network.MAINNET) {
+            log.info("Using " + Network.get() + " configuration");
+        }
+
+        com.sun.javafx.application.LauncherImpl.launchApplication(MainApp.class, MainAppPreloader.class, argv);
     }
 }

src/main/java/com/sparrowwallet/sparrow/MainAppPreloader.java

@@ -0,0 +1,11 @@
+package com.sparrowwallet.sparrow;
+
+import javafx.application.Preloader;
+import javafx.stage.Stage;
+
+public class MainAppPreloader extends Preloader {
+    @Override
+    public void start(Stage stage) {
+        com.sun.glass.ui.Application.GetApplication().setName("Sparrow");
+    }
+}

src/main/java/com/sparrowwallet/sparrow/Theme.java

@@ -0,0 +1,5 @@
+package com.sparrowwallet.sparrow;
+
+public enum Theme {
+    LIGHT, DARK
+}

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

@@ -32,7 +32,7 @@ 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()));
+                setContextMenu(new EntryCell.AddressContextMenu(address, utxoEntry.getOutputDescriptor(), null));
                 Tooltip tooltip = new Tooltip();
                 tooltip.setText(getTooltipText(utxoEntry));
                 setTooltip(tooltip);

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

@@ -1,6 +1,7 @@
 package com.sparrowwallet.sparrow.control;
 
 import com.sparrowwallet.drongo.wallet.WalletNode;
+import com.sparrowwallet.sparrow.AppController;
 import com.sparrowwallet.sparrow.EventManager;
 import com.sparrowwallet.sparrow.event.ReceiveActionEvent;
 import com.sparrowwallet.sparrow.event.ReceiveToEvent;
@@ -10,7 +11,6 @@ import javafx.application.Platform;
 import javafx.beans.property.ReadOnlyObjectWrapper;
 import javafx.scene.control.*;
 import javafx.scene.input.MouseButton;
-import javafx.scene.text.Font;
 
 import java.util.List;
 import java.util.Optional;
@@ -33,7 +33,7 @@ public class AddressTreeTable extends CoinTreeTable {
         getColumns().add(addressCol);
 
         if(address != null) {
-            addressCol.setMinWidth(TextUtils.computeTextWidth(Font.font("Courier"), address, 0.0));
+            addressCol.setMinWidth(TextUtils.computeTextWidth(AppController.getMonospaceFont(), address, 0.0));
         }
 
         TreeTableColumn<Entry, String> labelCol = new TreeTableColumn<>("Label");

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

@@ -39,6 +39,7 @@ public class BalanceChart extends LineChart<Number, Number> {
 
         List<Data<Number, Number>> balanceDataList = walletTransactionsEntry.getChildren().stream()
                 .map(entry -> (TransactionEntry)entry)
+                .filter(txEntry -> txEntry.getBlockTransaction().getHeight() > 0)
                 .map(txEntry -> new XYChart.Data<>((Number)txEntry.getBlockTransaction().getDate().getTime(), (Number)txEntry.getBalance(), txEntry))
                 .collect(Collectors.toList());
 
@@ -83,7 +84,7 @@ public class BalanceChart extends LineChart<Number, Number> {
             XYChart.Data<Number, Number> data = balanceSeries.getData().get(i);
             Node symbol = lookup(".chart-line-symbol.data" + i);
             if(symbol != null) {
-                if(data.getXValue().equals(transactionEntry.getBlockTransaction().getDate().getTime()) && data.getExtraValue() != null) {
+                if(transactionEntry.getBlockTransaction().getDate() != null && data.getXValue().equals(transactionEntry.getBlockTransaction().getDate().getTime()) && data.getExtraValue() != null) {
                     symbol.getStyleClass().add("selected");
                     selectedEntry = transactionEntry;
                 }

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

@@ -58,7 +58,7 @@ public class CoinLabel extends CopyableLabel {
         setTooltip(tooltip);
         setContextMenu(contextMenu);
 
-        String satsValue = String.format(Locale.ENGLISH, "%,d",value) + " sats";
+        String satsValue = String.format(Locale.ENGLISH, "%,d", value) + " sats";
         String btcValue = BTC_FORMAT.format(value.doubleValue() / Transaction.SATOSHIS_PER_BITCOIN) + " BTC";
 
         BitcoinUnit unit = bitcoinUnit;

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

@@ -4,13 +4,15 @@ import javafx.scene.control.TextFormatter;
 import javafx.scene.control.TextInputControl;
 
 import java.text.DecimalFormat;
+import java.text.DecimalFormatSymbols;
 import java.text.ParseException;
+import java.util.Locale;
 import java.util.function.UnaryOperator;
 import java.util.regex.Pattern;
 
 public class CoinTextFormatter extends TextFormatter<String> {
     private static final Pattern COIN_VALIDATION = Pattern.compile("[\\d,]*(\\.\\d{0,8})?");
-    public static final DecimalFormat COIN_FORMAT = new DecimalFormat("###,###.########");
+    public static final DecimalFormat COIN_FORMAT = new DecimalFormat("###,###.########", DecimalFormatSymbols.getInstance(Locale.ENGLISH));
 
     public CoinTextFormatter() {
         super(new CoinFilter());

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

@@ -2,8 +2,11 @@ package com.sparrowwallet.sparrow.control;
 
 import com.sparrowwallet.drongo.BitcoinUnit;
 import com.sparrowwallet.drongo.wallet.Wallet;
+import com.sparrowwallet.sparrow.event.WalletHistoryStatusEvent;
 import com.sparrowwallet.sparrow.io.Config;
 import com.sparrowwallet.sparrow.wallet.Entry;
+import javafx.application.Platform;
+import javafx.scene.control.Label;
 import javafx.scene.control.TreeTableView;
 
 public class CoinTreeTable extends TreeTableView<Entry> {
@@ -33,4 +36,20 @@ public class CoinTreeTable extends TreeTableView<Entry> {
             refresh();
         }
     }
+
+    public void updateHistoryStatus(WalletHistoryStatusEvent event) {
+        Platform.runLater(() -> {
+            if(event.getErrorMessage() != null) {
+                setPlaceholder(new Label("Error loading transactions: " + event.getErrorMessage()));
+            } else if(event.isLoading()) {
+                if(event.getStatusMessage() != null) {
+                    setPlaceholder(new Label(event.getStatusMessage() + "..."));
+                } else {
+                    setPlaceholder(new Label("Loading transactions..."));
+                }
+            } else {
+                setPlaceholder(new Label("No transactions"));
+            }
+        });
+    }
 }

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

@@ -33,9 +33,14 @@ public class DateCell extends TreeTableCell<Entry, Entry> {
         } else {
             if(entry instanceof UtxoEntry) {
                 UtxoEntry utxoEntry = (UtxoEntry)entry;
-                String date = DATE_FORMAT.format(utxoEntry.getHashIndex().getDate());
-                setText(date);
-                setContextMenu(new DateContextMenu(date, utxoEntry.getHashIndex()));
+                if(utxoEntry.getHashIndex().getHeight() <= 0) {
+                    setText("Unconfirmed " + (utxoEntry.isSpendable() ? "(Spendable)" : "(Not yet spendable)"));
+                } else {
+                    String date = DATE_FORMAT.format(utxoEntry.getHashIndex().getDate());
+                    setText(date);
+                    setContextMenu(new DateContextMenu(date, utxoEntry.getHashIndex()));
+                }
+
                 Tooltip tooltip = new Tooltip();
                 int height = utxoEntry.getHashIndex().getHeight();
                 tooltip.setText(height > 0 ? Integer.toString(height) : "Mempool");

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

@@ -0,0 +1,89 @@
+package com.sparrowwallet.sparrow.control;
+
+import com.sparrowwallet.drongo.OutputDescriptor;
+import com.sparrowwallet.drongo.policy.PolicyType;
+import com.sparrowwallet.drongo.protocol.ScriptType;
+import com.sparrowwallet.drongo.wallet.Keystore;
+import com.sparrowwallet.drongo.wallet.Wallet;
+import javafx.scene.control.ContextMenu;
+import javafx.scene.control.MenuItem;
+import javafx.scene.input.Clipboard;
+import javafx.scene.input.ClipboardContent;
+import org.fxmisc.richtext.CodeArea;
+
+import java.util.List;
+
+import static com.sparrowwallet.drongo.policy.PolicyType.MULTI;
+import static com.sparrowwallet.drongo.policy.PolicyType.SINGLE;
+import static com.sparrowwallet.drongo.protocol.ScriptType.MULTISIG;
+
+public class DescriptorArea extends CodeArea {
+    private Wallet wallet;
+
+    public void setWallet(Wallet wallet) {
+        clear();
+        this.wallet = wallet;
+
+        DescriptorContextMenu contextMenu = new DescriptorContextMenu(wallet, this);
+        setContextMenu(contextMenu);
+
+        PolicyType policyType = wallet.getPolicyType();
+        ScriptType scriptType = wallet.getScriptType();
+        List<Keystore> keystores = wallet.getKeystores();
+        int threshold = wallet.getDefaultPolicy().getNumSignaturesRequired();
+
+        if(SINGLE.equals(policyType)) {
+            append(scriptType.getDescriptor(), "descriptor-text");
+            replace(getLength(), getLength(), keystores.get(0).getScriptName(), List.of(keystores.get(0).isValid() ? "descriptor-text" : "descriptor-error", keystores.get(0).getScriptName()));
+            append(scriptType.getCloseDescriptor(), "descriptor-text");
+        }
+
+        if(MULTI.equals(policyType)) {
+            append(scriptType.getDescriptor(), "descriptor-text");
+            append(MULTISIG.getDescriptor(), "descriptor-text");
+            append(Integer.toString(threshold), "descriptor-text");
+
+            for(Keystore keystore : keystores) {
+                append(",", "descriptor-text");
+                replace(getLength(), getLength(), keystore.getScriptName(), List.of(keystore.isValid() ? "descriptor-text" : "descriptor-error", keystore.getScriptName()));
+            }
+
+            append(MULTISIG.getCloseDescriptor(), "descriptor-text");
+            append(scriptType.getCloseDescriptor(), "descriptor-text");
+        }
+    }
+
+    public Wallet getWallet() {
+        return wallet;
+    }
+
+    public void clear() {
+        super.clear();
+        this.wallet = null;
+        setDisable(false);
+        setContextMenu(null);
+    }
+
+    private static class DescriptorContextMenu extends ContextMenu {
+        public DescriptorContextMenu(Wallet wallet, DescriptorArea descriptorArea) {
+            MenuItem copyvalue = new MenuItem("Copy Value");
+            copyvalue.setOnAction(AE -> {
+                hide();
+                ClipboardContent content = new ClipboardContent();
+                content.putString(descriptorArea.getText());
+                Clipboard.getSystemClipboard().setContent(content);
+            });
+            getItems().add(copyvalue);
+
+            MenuItem copyOutputDescriptor = new MenuItem("Copy Output Descriptor");
+            copyOutputDescriptor.setOnAction(AE -> {
+                hide();
+                ClipboardContent content = new ClipboardContent();
+                content.putString(OutputDescriptor.getOutputDescriptor(wallet).toString(true));
+                Clipboard.getSystemClipboard().setContent(content);
+            });
+            getItems().add(copyOutputDescriptor);
+            this.setStyle("-fx-background-color: -fx-color; -fx-font-family: System; -fx-font-size: 1em;");
+        }
+    }
+}

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

@@ -13,8 +13,8 @@ public class DeviceAddressDialog extends DeviceDialog<String> {
     private final Wallet wallet;
     private final KeyDerivation keyDerivation;
 
-    public DeviceAddressDialog(List<Device> devices, Wallet wallet, KeyDerivation keyDerivation) {
-        super(devices);
+    public DeviceAddressDialog(List<String> operationFingerprints, Wallet wallet, KeyDerivation keyDerivation) {
+        super(operationFingerprints);
         this.wallet = wallet;
         this.keyDerivation = keyDerivation;
 

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

@@ -15,10 +15,12 @@ import javafx.scene.layout.StackPane;
 import javafx.scene.layout.VBox;
 import org.controlsfx.glyphfont.Glyph;
 
+import java.util.ArrayList;
 import java.util.List;
+import java.util.Objects;
 
 public abstract class DeviceDialog<R> extends Dialog<R> {
-    private final List<Device> operationDevices;
+    private final List<String> operationFingerprints;
     private final Accordion deviceAccordion;
     private final VBox scanBox;
     private final Label scanLabel;
@@ -27,11 +29,12 @@ public abstract class DeviceDialog<R> extends Dialog<R> {
         this(null);
     }
 
-    public DeviceDialog(List<Device> operationDevices) {
-        this.operationDevices = operationDevices;
+    public DeviceDialog(List<String> operationFingerprints) {
+        this.operationFingerprints = operationFingerprints;
 
         final DialogPane dialogPane = getDialogPane();
         dialogPane.getStylesheets().add(AppController.class.getResource("general.css").toExternalForm());
+        AppController.setStageIcon(dialogPane.getScene().getWindow());
 
         StackPane stackPane = new StackPane();
         dialogPane.setContent(stackPane);
@@ -103,16 +106,20 @@ public abstract class DeviceDialog<R> extends Dialog<R> {
     }
 
     protected void setDevices(List<Device> devices) {
-        List<Device> dialogDevices = devices;
-        if(operationDevices != null && dialogDevices.containsAll(operationDevices)) {
-            dialogDevices = operationDevices;
+        List<Device> dialogDevices = new ArrayList<>(devices);
+        dialogDevices.removeIf(Objects::isNull);
+
+        if(operationFingerprints != null) {
+            dialogDevices.removeIf(device -> {
+                return device.getFingerprint() != null && !operationFingerprints.contains(device.getFingerprint()) && !(device.getNeedsPinSent() || device.getNeedsPassphraseSent());
+            });
         }
 
         deviceAccordion.getPanes().clear();
 
         if(dialogDevices.isEmpty()) {
             scanBox.setVisible(true);
-            scanLabel.setText("No devices found");
+            scanLabel.setText("No matching devices found");
         } else {
             scanBox.setVisible(false);
             for(Device device : dialogDevices) {

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

@@ -10,11 +10,13 @@ import com.sparrowwallet.drongo.wallet.Wallet;
 import com.sparrowwallet.sparrow.EventManager;
 import com.sparrowwallet.sparrow.event.AddressDisplayedEvent;
 import com.sparrowwallet.sparrow.event.KeystoreImportEvent;
+import com.sparrowwallet.sparrow.event.MessageSignedEvent;
 import com.sparrowwallet.sparrow.event.PSBTSignedEvent;
 import com.sparrowwallet.sparrow.io.Device;
 import com.sparrowwallet.sparrow.io.Hwi;
 import com.sparrowwallet.drongo.wallet.WalletModel;
 import com.sparrowwallet.sparrow.glyphfont.FontAwesome5;
+import javafx.application.Platform;
 import javafx.beans.property.SimpleStringProperty;
 import javafx.geometry.Insets;
 import javafx.geometry.Pos;
@@ -37,6 +39,7 @@ public class DevicePane extends TitledDescriptionPane {
     private final Wallet wallet;
     private final PSBT psbt;
     private final KeyDerivation keyDerivation;
+    private final String message;
     private final Device device;
 
     private CustomPasswordField pinField;
@@ -46,6 +49,7 @@ public class DevicePane extends TitledDescriptionPane {
     private SplitMenuButton importButton;
     private Button signButton;
     private Button displayAddressButton;
+    private Button signMessageButton;
 
     private final SimpleStringProperty passphrase = new SimpleStringProperty("");
 
@@ -55,6 +59,7 @@ public class DevicePane extends TitledDescriptionPane {
         this.wallet = wallet;
         this.psbt = null;
         this.keyDerivation = null;
+        this.message = null;
         this.device = device;
 
         setDefaultStatus();
@@ -80,6 +85,7 @@ public class DevicePane extends TitledDescriptionPane {
         this.wallet = null;
         this.psbt = psbt;
         this.keyDerivation = null;
+        this.message = null;
         this.device = device;
 
         setDefaultStatus();
@@ -105,6 +111,7 @@ public class DevicePane extends TitledDescriptionPane {
         this.wallet = wallet;
         this.psbt = null;
         this.keyDerivation = keyDerivation;
+        this.message = null;
         this.device = device;
 
         setDefaultStatus();
@@ -124,6 +131,32 @@ public class DevicePane extends TitledDescriptionPane {
         buttonBox.getChildren().addAll(setPassphraseButton, displayAddressButton);
     }
 
+    public DevicePane(Wallet wallet, String message, KeyDerivation keyDerivation, Device device) {
+        super(device.getModel().toDisplayString(), "", "", "image/" + device.getType() + ".png");
+        this.deviceOperation = DeviceOperation.SIGN_MESSAGE;
+        this.wallet = wallet;
+        this.psbt = null;
+        this.keyDerivation = keyDerivation;
+        this.message = message;
+        this.device = device;
+
+        setDefaultStatus();
+        showHideLink.setVisible(false);
+
+        createSetPassphraseButton();
+        createSignMessageButton();
+
+        if (device.getNeedsPinSent() != null && device.getNeedsPinSent()) {
+            unlockButton.setVisible(true);
+        } else if(device.getNeedsPassphraseSent() != null && device.getNeedsPassphraseSent()) {
+            setPassphraseButton.setVisible(true);
+        } else {
+            showOperationButton();
+        }
+
+        buttonBox.getChildren().addAll(setPassphraseButton, signMessageButton);
+    }
+
     @Override
     protected Control createButton() {
         createUnlockButton();
@@ -208,8 +241,24 @@ 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);
+            signMessage();
+        });
+        signMessageButton.managedProperty().bind(signMessageButton.visibleProperty());
+        signMessageButton.setVisible(false);
+
+        if(device.getFingerprint() != null && !device.getFingerprint().equals(keyDerivation.getMasterFingerprint())) {
+            signMessageButton.setDisable(true);
+        }
+    }
+
     private void unlock(Device device) {
-        if(device.getModel().equals(WalletModel.TREZOR_1)) {
+        if(device.getModel().requiresPinPrompt()) {
             promptPin();
         }
     }
@@ -273,6 +322,8 @@ public class DevicePane extends TitledDescriptionPane {
         contentBox.getChildren().add(sendPassphraseButton);
         contentBox.setPadding(new Insets(10, 30, 10, 30));
 
+        Platform.runLater(passphraseField::requestFocus);
+
         return contentBox;
     }
 
@@ -342,8 +393,7 @@ public class DevicePane extends TitledDescriptionPane {
 
             if(device.getFingerprint() != null) {
                 setPassphraseButton.setVisible(false);
-                device.setNeedsPassphraseSent(false);
-                setDefaultStatus();
+                setDescription("Passphrase sent");
                 showOperationButton();
             } else {
                 setError("Passphrase send failed", null);
@@ -436,6 +486,20 @@ public class DevicePane extends TitledDescriptionPane {
         displayAddressService.start();
     }
 
+    private void signMessage() {
+        Hwi.SignMessageService signMessageService = new Hwi.SignMessageService(device, passphrase.get(), message, keyDerivation.getDerivationPath());
+        signMessageService.setOnSucceeded(successEvent -> {
+            String signature = signMessageService.getValue();
+            EventManager.get().post(new MessageSignedEvent(wallet, signature));
+        });
+        signMessageService.setOnFailed(failedEvent -> {
+            setError("Could not sign message", signMessageService.getException().getMessage());
+            signMessageButton.setDisable(false);
+        });
+        setDescription("Signing message...");
+        signMessageService.start();
+    }
+
     private void showOperationButton() {
         if(deviceOperation.equals(DeviceOperation.IMPORT)) {
             importButton.setVisible(true);
@@ -448,6 +512,9 @@ public class DevicePane extends TitledDescriptionPane {
         } else if(deviceOperation.equals(DeviceOperation.DISPLAY_ADDRESS)) {
             displayAddressButton.setVisible(true);
             showHideLink.setVisible(false);
+        } else if(deviceOperation.equals(DeviceOperation.SIGN_MESSAGE)) {
+            signMessageButton.setVisible(true);
+            showHideLink.setVisible(false);
         }
     }
 
@@ -488,6 +555,6 @@ public class DevicePane extends TitledDescriptionPane {
     }
 
     public enum DeviceOperation {
-        IMPORT, SIGN, DISPLAY_ADDRESS;
+        IMPORT, SIGN, DISPLAY_ADDRESS, SIGN_MESSAGE;
     }
 }

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

@@ -11,8 +11,8 @@ import java.util.List;
 public class DeviceSignDialog extends DeviceDialog<PSBT> {
     private final PSBT psbt;
 
-    public DeviceSignDialog(List<Device> devices, PSBT psbt) {
-        super(devices);
+    public DeviceSignDialog(List<String> operationFingerprints, PSBT psbt) {
+        super(operationFingerprints);
         this.psbt = psbt;
         EventManager.get().register(this);
         setOnCloseRequest(event -> {

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

@@ -0,0 +1,39 @@
+package com.sparrowwallet.sparrow.control;
+
+import com.google.common.eventbus.Subscribe;
+import com.sparrowwallet.drongo.KeyDerivation;
+import com.sparrowwallet.drongo.wallet.Wallet;
+import com.sparrowwallet.sparrow.EventManager;
+import com.sparrowwallet.sparrow.event.MessageSignedEvent;
+import com.sparrowwallet.sparrow.io.Device;
+
+import java.util.List;
+
+public class DeviceSignMessageDialog extends DeviceDialog<String> {
+    private final Wallet wallet;
+    private final String message;
+    private final KeyDerivation keyDerivation;
+
+    public DeviceSignMessageDialog(List<String> operationFingerprints, Wallet wallet, String message, KeyDerivation keyDerivation) {
+        super(operationFingerprints);
+        this.wallet = wallet;
+        this.message = message;
+        this.keyDerivation = keyDerivation;
+        EventManager.get().register(this);
+        setOnCloseRequest(event -> {
+            EventManager.get().unregister(this);
+        });
+    }
+
+    @Override
+    protected DevicePane getDevicePane(Device device) {
+        return new DevicePane(wallet, message, keyDerivation, device);
+    }
+
+    @Subscribe
+    public void messageSigned(MessageSignedEvent event) {
+        if(wallet == event.getWallet()) {
+            setResult(event.getSignature());
+        }
+    }
+}

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

@@ -0,0 +1,24 @@
+package com.sparrowwallet.sparrow.control;
+
+import tornadofx.control.Form;
+
+public class DynamicForm extends Form {
+    private DynamicUpdate dynamicUpdate;
+
+    public DynamicForm() {
+        super();
+    }
+
+    public void setDynamicUpdate(DynamicUpdate dynamicUpdate) {
+        this.dynamicUpdate = dynamicUpdate;
+    }
+
+    @Override
+    protected void layoutChildren() {
+        if(dynamicUpdate != null) {
+            dynamicUpdate.update();
+        }
+
+        super.layoutChildren();
+    }
+}

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

@@ -0,0 +1,5 @@
+package com.sparrowwallet.sparrow.control;
+
+public interface DynamicUpdate {
+    void update();
+}

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

@@ -3,6 +3,7 @@ package com.sparrowwallet.sparrow.control;
 import com.sparrowwallet.drongo.Utils;
 import com.sparrowwallet.drongo.address.Address;
 import com.sparrowwallet.drongo.wallet.BlockTransaction;
+import com.sparrowwallet.drongo.wallet.KeystoreSource;
 import com.sparrowwallet.sparrow.EventManager;
 import com.sparrowwallet.sparrow.event.*;
 import com.sparrowwallet.sparrow.glyphfont.FontAwesome5;
@@ -43,9 +44,18 @@ class EntryCell extends TreeTableCell<Entry, Entry> {
         } else {
             if(entry instanceof TransactionEntry) {
                 TransactionEntry transactionEntry = (TransactionEntry)entry;
-                String date = DATE_FORMAT.format(transactionEntry.getBlockTransaction().getDate());
-                setText(date);
-                setContextMenu(new TransactionContextMenu(date, transactionEntry.getBlockTransaction()));
+                if(transactionEntry.getBlockTransaction().getHeight() == -1) {
+                    setText("Unconfirmed Parent");
+                    setContextMenu(new UnconfirmedTransactionContextMenu(transactionEntry.getBlockTransaction()));
+                } else if(transactionEntry.getBlockTransaction().getHeight() == 0) {
+                    setText("Unconfirmed");
+                    setContextMenu(new UnconfirmedTransactionContextMenu(transactionEntry.getBlockTransaction()));
+                } else {
+                    String date = DATE_FORMAT.format(transactionEntry.getBlockTransaction().getDate());
+                    setText(date);
+                    setContextMenu(new TransactionContextMenu(date, transactionEntry.getBlockTransaction()));
+                }
+
                 Tooltip tooltip = new Tooltip();
                 tooltip.setText(transactionEntry.getBlockTransaction().getHash().toString());
                 setTooltip(tooltip);
@@ -62,12 +72,13 @@ class EntryCell extends TreeTableCell<Entry, Entry> {
                 NodeEntry nodeEntry = (NodeEntry)entry;
                 Address address = nodeEntry.getAddress();
                 setText(address.toString());
-                setContextMenu(new AddressContextMenu(address, nodeEntry.getOutputDescriptor()));
+                setContextMenu(new AddressContextMenu(address, nodeEntry.getOutputDescriptor(), null));
                 Tooltip tooltip = new Tooltip();
                 tooltip.setText(nodeEntry.getNode().getDerivationPath());
                 setTooltip(tooltip);
                 getStyleClass().add("address-cell");
 
+                HBox actionBox = new HBox();
                 Button receiveButton = new Button("");
                 Glyph receiveGlyph = new Glyph("FontAwesome", FontAwesome.Glyph.ARROW_DOWN);
                 receiveGlyph.setFontSize(12);
@@ -76,7 +87,23 @@ class EntryCell extends TreeTableCell<Entry, Entry> {
                     EventManager.get().post(new ReceiveActionEvent(nodeEntry));
                     Platform.runLater(() -> EventManager.get().post(new ReceiveToEvent(nodeEntry)));
                 });
-                setGraphic(receiveButton);
+                actionBox.getChildren().add(receiveButton);
+
+                if(nodeEntry.getWallet().getKeystores().size() == 1 &&
+                        (nodeEntry.getWallet().getKeystores().get(0).hasSeed() || 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.setOnAction(event -> {
+                        MessageSignDialog messageSignDialog = new MessageSignDialog(nodeEntry.getWallet(), nodeEntry.getNode());
+                        messageSignDialog.showAndWait();
+                    });
+                    actionBox.getChildren().add(signMessageButton);
+                    setContextMenu(new AddressContextMenu(address, nodeEntry.getOutputDescriptor(), nodeEntry));
+                }
+
+                setGraphic(actionBox);
             } else if(entry instanceof HashIndexEntry) {
                 HashIndexEntry hashIndexEntry = (HashIndexEntry)entry;
                 setText(hashIndexEntry.getDescription());
@@ -95,7 +122,7 @@ class EntryCell extends TreeTableCell<Entry, Entry> {
                 });
                 actionBox.getChildren().add(viewTransactionButton);
 
-                if(hashIndexEntry.getType().equals(HashIndexEntry.Type.OUTPUT) && !hashIndexEntry.isSpent()) {
+                if(hashIndexEntry.getType().equals(HashIndexEntry.Type.OUTPUT) && hashIndexEntry.isSpendable()) {
                     Button spendUtxoButton = new Button("");
                     Glyph sendGlyph = new Glyph("FontAwesome", FontAwesome.Glyph.SEND);
                     sendGlyph.setFontSize(12);
@@ -105,7 +132,7 @@ class EntryCell extends TreeTableCell<Entry, Entry> {
                                 .map(tp -> tp.getTreeItem().getValue())
                                 .filter(e -> e instanceof HashIndexEntry)
                                 .map(e -> (HashIndexEntry)e)
-                                .filter(e -> e.getType().equals(HashIndexEntry.Type.OUTPUT) && !hashIndexEntry.isSpent())
+                                .filter(e -> e.getType().equals(HashIndexEntry.Type.OUTPUT) && e.isSpendable())
                                 .collect(Collectors.toList());
 
                         if(!utxoEntries.contains(hashIndexEntry)) {
@@ -124,6 +151,20 @@ class EntryCell extends TreeTableCell<Entry, Entry> {
         }
     }
 
+    private static class UnconfirmedTransactionContextMenu extends ContextMenu {
+        public UnconfirmedTransactionContextMenu(BlockTransaction blockTransaction) {
+            MenuItem copyTxid = new MenuItem("Copy Transaction ID");
+            copyTxid.setOnAction(AE -> {
+                hide();
+                ClipboardContent content = new ClipboardContent();
+                content.putString(blockTransaction.getHashAsString());
+                Clipboard.getSystemClipboard().setContent(content);
+            });
+
+            getItems().addAll(copyTxid);
+        }
+    }
+
     private static class TransactionContextMenu extends ContextMenu {
         public TransactionContextMenu(String date, BlockTransaction blockTransaction) {
             MenuItem copyDate = new MenuItem("Copy Date");
@@ -155,7 +196,7 @@ class EntryCell extends TreeTableCell<Entry, Entry> {
     }
 
     public static class AddressContextMenu extends ContextMenu {
-        public AddressContextMenu(Address address, String outputDescriptor) {
+        public AddressContextMenu(Address address, String outputDescriptor, NodeEntry nodeEntry) {
             MenuItem copyAddress = new MenuItem("Copy Address");
             copyAddress.setOnAction(AE -> {
                 hide();
@@ -181,6 +222,17 @@ 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);
+            }
         }
     }
 
@@ -202,9 +254,12 @@ class EntryCell extends TreeTableCell<Entry, Entry> {
     public static void applyRowStyles(TreeTableCell<?, ?> cell, Entry entry) {
         cell.getStyleClass().remove("transaction-row");
         cell.getStyleClass().remove("node-row");
+        cell.getStyleClass().remove("utxo-row");
         cell.getStyleClass().remove("address-cell");
         cell.getStyleClass().remove("hashindex-row");
+        cell.getStyleClass().remove("confirming");
         cell.getStyleClass().remove("spent");
+        cell.getStyleClass().remove("unspendable");
 
         if(entry != null) {
             if(entry instanceof TransactionEntry) {
@@ -222,6 +277,10 @@ class EntryCell extends TreeTableCell<Entry, Entry> {
                 cell.getStyleClass().add("node-row");
             } else if(entry instanceof UtxoEntry) {
                 cell.getStyleClass().add("utxo-row");
+                UtxoEntry utxoEntry = (UtxoEntry)entry;
+                if(!utxoEntry.isSpendable()) {
+                    cell.getStyleClass().add("unspendable");
+                }
             } else if(entry instanceof HashIndexEntry) {
                 cell.getStyleClass().add("hashindex-row");
                 HashIndexEntry hashIndexEntry = (HashIndexEntry)entry;

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

@@ -11,10 +11,12 @@ import javafx.scene.input.ClipboardContent;
 
 import java.math.BigDecimal;
 import java.text.DecimalFormat;
+import java.text.DecimalFormatSymbols;
 import java.util.Currency;
+import java.util.Locale;
 
 public class FiatLabel extends CopyableLabel {
-    private static final DecimalFormat CURRENCY_FORMAT = new DecimalFormat("#,##0.00");
+    private static final DecimalFormat CURRENCY_FORMAT = new DecimalFormat("#,##0.00", DecimalFormatSymbols.getInstance(Locale.ENGLISH));
 
     private final LongProperty valueProperty = new SimpleLongProperty(-1);
     private final DoubleProperty btcRateProperty = new SimpleDoubleProperty(0.0);

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

@@ -28,7 +28,7 @@ public abstract class FileImportPane extends TitledDescriptionPane {
     private static final Logger log = LoggerFactory.getLogger(FileImportPane.class);
 
     private final FileImport importer;
-    private Button importButton;
+    protected Button importButton;
     private final SimpleStringProperty password = new SimpleStringProperty("");
 
     public FileImportPane(FileImport importer, String title, String description, String content, String imageUrl) {
@@ -53,7 +53,8 @@ public abstract class FileImportPane extends TitledDescriptionPane {
         fileChooser.setTitle("Open " + importer.getWalletModel().toDisplayString() + " File");
         fileChooser.getExtensionFilters().addAll(
                 new FileChooser.ExtensionFilter("All Files", "*.*"),
-                new FileChooser.ExtensionFilter("JSON", "*.json")
+                new FileChooser.ExtensionFilter("JSON", "*.json"),
+                new FileChooser.ExtensionFilter("TXT", "*.txt")
         );
 
         File file = fileChooser.showOpenDialog(window);

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

@@ -0,0 +1,106 @@
+package com.sparrowwallet.sparrow.control;
+
+import com.google.common.io.ByteStreams;
+import com.google.gson.JsonParseException;
+import com.sparrowwallet.drongo.policy.Policy;
+import com.sparrowwallet.drongo.policy.PolicyType;
+import com.sparrowwallet.drongo.protocol.ScriptType;
+import com.sparrowwallet.drongo.wallet.Keystore;
+import com.sparrowwallet.drongo.wallet.Wallet;
+import com.sparrowwallet.sparrow.EventManager;
+import com.sparrowwallet.sparrow.event.WalletImportEvent;
+import com.sparrowwallet.sparrow.io.ImportException;
+import com.sparrowwallet.sparrow.io.KeystoreFileImport;
+import javafx.collections.FXCollections;
+import javafx.geometry.Insets;
+import javafx.geometry.Pos;
+import javafx.scene.Node;
+import javafx.scene.control.Button;
+import javafx.scene.control.ComboBox;
+import javafx.scene.control.Label;
+import javafx.scene.layout.HBox;
+import javafx.scene.layout.Priority;
+import javafx.scene.layout.Region;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.ByteArrayInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+
+public class FileWalletKeystoreImportPane extends FileImportPane {
+    private static final Logger log = LoggerFactory.getLogger(FileWalletKeystoreImportPane.class);
+
+    private final KeystoreFileImport importer;
+    private String fileName;
+    private byte[] fileBytes;
+
+    public FileWalletKeystoreImportPane(KeystoreFileImport importer) {
+        super(importer, importer.getName(), "Wallet file import", importer.getKeystoreImportDescription(), "image/" + importer.getWalletModel().getType() + ".png");
+        this.importer = importer;
+    }
+
+    protected void importFile(String fileName, InputStream inputStream, String password) throws ImportException {
+        this.fileName = fileName;
+        try {
+            fileBytes = ByteStreams.toByteArray(inputStream);
+        } catch(IOException e) {
+            throw new ImportException("Could not read file", e);
+        }
+
+        setContent(getScriptTypeEntry());
+        setExpanded(true);
+        importButton.setDisable(true);
+    }
+
+    private void importWallet(ScriptType scriptType) throws ImportException {
+        ByteArrayInputStream bais = new ByteArrayInputStream(fileBytes);
+        Keystore keystore = importer.getKeystore(scriptType, bais, "");
+
+        Wallet wallet = new Wallet();
+        wallet.setName(fileName);
+        wallet.setPolicyType(PolicyType.SINGLE);
+        wallet.setScriptType(scriptType);
+        wallet.getKeystores().add(keystore);
+        wallet.setDefaultPolicy(Policy.getPolicy(PolicyType.SINGLE, scriptType, wallet.getKeystores(), null));
+
+        EventManager.get().post(new WalletImportEvent(wallet));
+    }
+
+    private Node getScriptTypeEntry() {
+        Label label = new Label("Script Type:");
+        ComboBox<ScriptType> scriptTypeComboBox = new ComboBox<>(FXCollections.observableArrayList(ScriptType.getAddressableScriptTypes(PolicyType.SINGLE)));
+        scriptTypeComboBox.setValue(ScriptType.P2WPKH);
+
+        Region region = new Region();
+        HBox.setHgrow(region, Priority.SOMETIMES);
+
+        Button importFileButton = new Button("Import");
+        importFileButton.setOnAction(event -> {
+            showHideLink.setVisible(true);
+            setExpanded(false);
+            try {
+                importWallet(scriptTypeComboBox.getValue());
+            } catch(ImportException e) {
+                log.error("Error importing file", e);
+                String errorMessage = e.getMessage();
+                if(e.getCause() instanceof JsonParseException) {
+                    errorMessage = "File was not in JSON format";
+                } else if(e.getCause() != null && e.getCause().getMessage() != null && !e.getCause().getMessage().isEmpty()) {
+                    errorMessage = e.getCause().getMessage();
+                }
+                setError("Import Error", errorMessage);
+                importButton.setDisable(false);
+            }
+        });
+
+        HBox contentBox = new HBox();
+        contentBox.setAlignment(Pos.CENTER_RIGHT);
+        contentBox.setSpacing(20);
+        contentBox.getChildren().addAll(label, scriptTypeComboBox, region, importFileButton);
+        contentBox.setPadding(new Insets(10, 30, 10, 30));
+        contentBox.setPrefHeight(60);
+
+        return contentBox;
+    }
+}

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

@@ -36,7 +36,7 @@ public class HelpLabel extends Label {
     private StringProperty helpText;
 
     public final void setHelpText(String value) {
-        helpTextProperty().setValue(value);
+        helpTextProperty().setValue(value.replace("\\n", "\n"));
     }
 
     public final String getHelpText() {

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

@@ -1,6 +1,6 @@
 package com.sparrowwallet.sparrow.control;
 
-import javafx.scene.text.Font;
+import com.sparrowwallet.sparrow.AppController;
 
 public class IdLabel extends CopyableLabel {
     public IdLabel() {
@@ -9,6 +9,6 @@ public class IdLabel extends CopyableLabel {
 
     public IdLabel(String text) {
         super(text);
-        setFont(Font.font("Courier"));
+        setFont(AppController.getMonospaceFont());
     }
 }

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

@@ -26,6 +26,7 @@ public class KeystorePassphraseDialog extends Dialog<String> {
         setTitle("Keystore Passphrase" + (walletName != null ? " - " + walletName : ""));
         dialogPane.setHeaderText("Please enter the passphrase for keystore: \n" + keystore.getLabel());
         dialogPane.getStylesheets().add(AppController.class.getResource("general.css").toExternalForm());
+        AppController.setStageIcon(dialogPane.getScene().getWindow());
         dialogPane.getButtonTypes().addAll(ButtonType.CANCEL, ButtonType.OK);
         dialogPane.setPrefWidth(380);
         dialogPane.setPrefHeight(200);

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

@@ -0,0 +1,329 @@
+package com.sparrowwallet.sparrow.control;
+
+import com.google.common.eventbus.Subscribe;
+import com.sparrowwallet.drongo.KeyDerivation;
+import com.sparrowwallet.drongo.SecureString;
+import com.sparrowwallet.drongo.address.Address;
+import com.sparrowwallet.drongo.address.InvalidAddressException;
+import com.sparrowwallet.drongo.crypto.ECKey;
+import com.sparrowwallet.drongo.policy.PolicyType;
+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.drongo.wallet.WalletNode;
+import com.sparrowwallet.sparrow.AppController;
+import com.sparrowwallet.sparrow.EventManager;
+import com.sparrowwallet.sparrow.event.OpenWalletsEvent;
+import com.sparrowwallet.sparrow.event.RequestOpenWalletsEvent;
+import com.sparrowwallet.sparrow.event.StorageEvent;
+import com.sparrowwallet.sparrow.event.TimedEvent;
+import com.sparrowwallet.sparrow.io.Storage;
+import javafx.application.Platform;
+import javafx.scene.control.*;
+import javafx.scene.image.Image;
+import javafx.scene.image.ImageView;
+import javafx.scene.layout.VBox;
+import org.controlsfx.validation.ValidationResult;
+import org.controlsfx.validation.ValidationSupport;
+import org.controlsfx.validation.decoration.StyleClassValidationDecoration;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import tornadofx.control.Field;
+import tornadofx.control.Fieldset;
+import tornadofx.control.Form;
+
+import java.security.SignatureException;
+import java.util.List;
+import java.util.Optional;
+
+import static com.sparrowwallet.sparrow.AppController.setStageIcon;
+
+public class MessageSignDialog extends Dialog<ButtonBar.ButtonData> {
+    private static final Logger log = LoggerFactory.getLogger(MessageSignDialog.class);
+
+    private final TextField address;
+    private final TextArea message;
+    private final TextArea signature;
+    private final Wallet wallet;
+    private WalletNode walletNode;
+
+    /**
+     * Verification only constructor
+     */
+    public MessageSignDialog() {
+        this(null, null);
+    }
+
+    /**
+     * Sign and verify with user entered address
+     *
+     * @param wallet Wallet to sign with
+     */
+    public MessageSignDialog(Wallet wallet) {
+        this(wallet, null);
+    }
+
+    /**
+     * Sign and verify with preset address
+     *
+     * @param wallet Wallet to sign with
+     * @param walletNode Wallet node to derive address from
+     */
+    public MessageSignDialog(Wallet wallet, WalletNode walletNode) {
+        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");
+            }
+            if(!wallet.getKeystores().get(0).hasSeed() && wallet.getKeystores().get(0).getSource() != KeystoreSource.HW_USB) {
+                throw new IllegalArgumentException("Cannot sign messages using a wallet without a seed or USB keystore");
+            }
+        }
+
+        this.wallet = wallet;
+        this.walletNode = walletNode;
+
+        final DialogPane dialogPane = getDialogPane();
+        dialogPane.getStylesheets().add(AppController.class.getResource("general.css").toExternalForm());
+        AppController.setStageIcon(dialogPane.getScene().getWindow());
+        dialogPane.setHeaderText(wallet == null ? "Verify Message" : "Sign/Verify Message");
+
+        Image image = new Image("image/seed.png", 50, 50, false, false);
+        if (!image.isError()) {
+            ImageView imageView = new ImageView();
+            imageView.setSmooth(false);
+            imageView.setImage(image);
+            dialogPane.setGraphic(imageView);
+        }
+
+        VBox vBox = new VBox();
+        vBox.setSpacing(20);
+
+        Form form = new Form();
+        Fieldset fieldset = new Fieldset();
+        fieldset.setText("");
+
+        Field addressField = new Field();
+        addressField.setText("Address:");
+        address = new TextField();
+        address.getStyleClass().add("id");
+        address.setEditable(walletNode == null);
+        addressField.getInputs().add(address);
+
+        if(walletNode != null) {
+            address.setText(wallet.getAddress(walletNode).toString());
+        }
+
+        Field messageField = new Field();
+        messageField.setText("Message:");
+        message = new TextArea();
+        message.setWrapText(true);
+        message.setPrefRowCount(10);
+        message.setStyle("-fx-pref-height: 180px");
+        messageField.getInputs().add(message);
+
+        Field signatureField = new Field();
+        signatureField.setText("Signature:");
+        signature = new TextArea();
+        signature.getStyleClass().add("id");
+        signature.setPrefRowCount(2);
+        signature.setStyle("-fx-pref-height: 60px");
+        signature.setWrapText(true);
+        signatureField.getInputs().add(signature);
+
+        fieldset.getChildren().addAll(addressField, messageField, signatureField);
+        form.getChildren().add(fieldset);
+        dialogPane.setContent(form);
+
+        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();
+        });
+
+        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
+                }
+            }
+        });
+
+        EventManager.get().register(this);
+        setOnCloseRequest(event -> {
+            if(ButtonBar.ButtonData.APPLY.equals(getResult())) {
+                event.consume();
+                return;
+            }
+
+            EventManager.get().unregister(this);
+        });
+
+        setResultConverter(dialogButton -> dialogButton == signButtonType || dialogButton == verifyButtonType ? ButtonBar.ButtonData.APPLY : ButtonBar.ButtonData.OK_DONE);
+    }
+
+    private Address getAddress()throws InvalidAddressException {
+        return Address.fromString(address.getText());
+    }
+
+    private boolean isValidAddress() {
+        try {
+            getAddress();
+            return true;
+        } catch (InvalidAddressException e) {
+            return false;
+        }
+    }
+
+    private void setWalletNodeFromAddress(Wallet wallet, Address address) {
+        walletNode = wallet.getWalletAddresses().get(address);
+    }
+
+    private void signMessage() {
+        if(walletNode == null) {
+            AppController.showErrorDialog("Address not in wallet", "The provided address is not present in the currently selected wallet.");
+            return;
+        }
+
+        if(wallet.containsSeeds()) {
+            if(wallet.isEncrypted()) {
+                EventManager.get().post(new RequestOpenWalletsEvent());
+            } else {
+                signUnencryptedKeystore(wallet);
+            }
+        } else if(wallet.containsSource(KeystoreSource.HW_USB)) {
+            signUsbKeystore(wallet);
+        }
+    }
+
+    private void signUnencryptedKeystore(Wallet decryptedWallet) {
+        try {
+            //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);
+            signature.clear();
+            signature.appendText(signatureText);
+        } catch(Exception e) {
+            log.error("Could not sign message", e);
+            AppController.showErrorDialog("Could not sign message", e.getMessage());
+        }
+    }
+
+    private void signUsbKeystore(Wallet usbWallet) {
+        List<String> fingerprints = List.of(usbWallet.getKeystores().get(0).getKeyDerivation().getMasterFingerprint());
+        KeyDerivation fullDerivation = usbWallet.getKeystores().get(0).getKeyDerivation().extend(walletNode.getDerivation());
+        DeviceSignMessageDialog deviceSignMessageDialog = new DeviceSignMessageDialog(fingerprints, usbWallet, message.getText().trim(), fullDerivation);
+        Optional<String> optSignature = deviceSignMessageDialog.showAndWait();
+        if(optSignature.isPresent()) {
+            signature.clear();
+            signature.appendText(optSignature.get());
+        }
+    }
+
+    private void verifyMessage() {
+        try {
+            //Find ECKey from message and signature
+            //http://www.secg.org/download/aid-780/sec1-v2.pdf section 4.1.6
+            boolean verified = false;
+            try {
+                ECKey signedMessageKey = ECKey.signedMessageToKey(message.getText().trim(), signature.getText().trim(), false);
+                verified = verifyMessage(signedMessageKey);
+            } catch(SignatureException e) {
+                //ignore
+            }
+
+            if(!verified) {
+                try {
+                    ECKey electrumSignedMessageKey = ECKey.signedMessageToKey(message.getText(), signature.getText(), true);
+                    verified = verifyMessage(electrumSignedMessageKey);
+                } catch(SignatureException e) {
+                    //ignore
+                }
+            }
+
+            if(verified) {
+                Alert alert = new Alert(Alert.AlertType.INFORMATION);
+                setStageIcon(alert.getDialogPane().getScene().getWindow());
+                alert.setTitle("Verification Succeeded");
+                alert.setHeaderText("Verification Succeeded");
+                alert.setContentText("The signature verified against the message.");
+                alert.showAndWait();
+            } else {
+                AppController.showErrorDialog("Verification failed", "The provided signature did not match the message for this address.");
+            }
+        } catch(IllegalArgumentException e) {
+            AppController.showErrorDialog("Could not verify message", e.getMessage());
+        } catch(Exception e) {
+            log.error("Could not verify message", e);
+            AppController.showErrorDialog("Could not verify message", e.getMessage());
+        }
+    }
+
+    private boolean verifyMessage(ECKey signedMessageKey) throws InvalidAddressException, SignatureException {
+        Address providedAddress = getAddress();
+        ScriptType scriptType = providedAddress.getScriptType();
+        if(scriptType == ScriptType.P2SH) {
+            scriptType = ScriptType.P2SH_P2WPKH;
+        }
+        if(!ScriptType.getScriptTypesForPolicyType(PolicyType.SINGLE).contains(scriptType)) {
+            throw new IllegalArgumentException("Only single signature P2PKH, P2SH-P2WPKH or P2WPKH addresses can verify messages.");
+        }
+
+        Address signedMessageAddress = scriptType.getAddress(signedMessageKey);
+        return providedAddress.equals(signedMessageAddress);
+    }
+
+    @Subscribe
+    public void openWallets(OpenWalletsEvent event) {
+        Storage storage = event.getStorage(wallet);
+        if(storage == null) {
+            throw new IllegalStateException("Wallet " + wallet + " without Storage");
+        }
+
+        WalletPasswordDialog dlg = new WalletPasswordDialog(WalletPasswordDialog.PasswordRequirement.LOAD);
+        Optional<SecureString> password = dlg.showAndWait();
+        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"));
+                Wallet decryptedWallet = decryptWalletService.getValue();
+                signUnencryptedKeystore(decryptedWallet);
+            });
+            decryptWalletService.setOnFailed(workerStateEvent -> {
+                EventManager.get().post(new StorageEvent(storage.getWalletFile(), TimedEvent.Action.END, "Failed"));
+                AppController.showErrorDialog("Incorrect Password", decryptWalletService.getException().getMessage());
+            });
+            EventManager.get().post(new StorageEvent(storage.getWalletFile(), TimedEvent.Action.START, "Decrypting wallet..."));
+            decryptWalletService.start();
+        }
+    }
+}

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

@@ -54,7 +54,7 @@ public class MnemonicKeystoreImportPane extends TitledDescriptionPane {
     private final SimpleStringProperty passphraseProperty = new SimpleStringProperty();
 
     public MnemonicKeystoreImportPane(Wallet wallet, KeystoreMnemonicImport importer) {
-        super(importer.getName(), "Mnemonic import", importer.getKeystoreImportDescription(), "image/" + importer.getWalletModel().getType() + ".png");
+        super(importer.getName(), "Seed import", importer.getKeystoreImportDescription(), "image/" + importer.getWalletModel().getType() + ".png");
         this.wallet = wallet;
         this.importer = importer;
 
@@ -81,7 +81,7 @@ public class MnemonicKeystoreImportPane extends TitledDescriptionPane {
     private void createEnterMnemonicButton() {
         enterMnemonicButton = new SplitMenuButton();
         enterMnemonicButton.setAlignment(Pos.CENTER_RIGHT);
-        enterMnemonicButton.setText("Set Words Length");
+        enterMnemonicButton.setText("Set Words Size");
         enterMnemonicButton.setOnAction(event -> {
             enterMnemonic(24);
         });
@@ -188,7 +188,7 @@ public class MnemonicKeystoreImportPane extends TitledDescriptionPane {
             AnchorPane.setTopAnchor(invalidLabel, 5.0);
             AnchorPane.setLeftAnchor(invalidLabel, 0.0);
 
-            confirmButton = new Button("Confirm Written Backup");
+            confirmButton = new Button("Re-enter Words...");
             confirmButton.setOnAction(event -> {
                 confirmBackup();
             });
@@ -269,7 +269,7 @@ public class MnemonicKeystoreImportPane extends TitledDescriptionPane {
     }
 
     private void displayMnemonicCode() {
-        setDescription("Write down word list to confirm backup");
+        setDescription("Write down words before re-entering");
         showHideLink.setVisible(false);
 
         calculateButton.setVisible(false);

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

@@ -5,7 +5,7 @@ import com.google.zxing.client.j2se.MatrixToImageConfig;
 import com.google.zxing.client.j2se.MatrixToImageWriter;
 import com.google.zxing.common.BitMatrix;
 import com.google.zxing.qrcode.QRCodeWriter;
-import com.sparrowwallet.sparrow.EventManager;
+import com.sparrowwallet.sparrow.AppController;
 import com.sparrowwallet.sparrow.io.ImportException;
 import com.sparrowwallet.sparrow.ur.UR;
 import com.sparrowwallet.sparrow.ur.UREncoder;
@@ -48,12 +48,13 @@ public class QRDisplayDialog extends Dialog<UR> {
         this.encoder = new UREncoder(ur, MAX_FRAGMENT_LENGTH, MIN_FRAGMENT_LENGTH, 0);
 
         final DialogPane dialogPane = getDialogPane();
+        AppController.setStageIcon(dialogPane.getScene().getWindow());
 
         StackPane stackPane = new StackPane();
         qrImageView = new ImageView();
         stackPane.getChildren().add(qrImageView);
 
-        dialogPane.setContent(Borders.wrap(stackPane).lineBorder().outerPadding(0).innerPadding(0).buildAll());
+        dialogPane.setContent(Borders.wrap(stackPane).lineBorder().buildAll());
 
         nextPart();
         if(encoder.isSinglePart()) {
@@ -75,6 +76,28 @@ public class QRDisplayDialog extends Dialog<UR> {
         setResultConverter(dialogButton -> dialogButton != cancelButtonType ? ur : null);
     }
 
+    public QRDisplayDialog(String data) {
+        this.ur = null;
+        this.encoder = null;
+
+        final DialogPane dialogPane = getDialogPane();
+        AppController.setStageIcon(dialogPane.getScene().getWindow());
+
+        StackPane stackPane = new StackPane();
+        qrImageView = new ImageView();
+        stackPane.getChildren().add(qrImageView);
+
+        dialogPane.setContent(Borders.wrap(stackPane).lineBorder().buildAll());
+        qrImageView.setImage(getQrCode(data));
+
+        final ButtonType cancelButtonType = new javafx.scene.control.ButtonType("Cancel", ButtonBar.ButtonData.CANCEL_CLOSE);
+        dialogPane.getButtonTypes().addAll(cancelButtonType);
+        dialogPane.setPrefWidth(500);
+        dialogPane.setPrefHeight(550);
+
+        setResultConverter(dialogButton -> dialogButton != cancelButtonType ? ur : null);
+    }
+
     private void nextPart() {
         String fragment = encoder.nextPart();
         currentPart = fragment.toUpperCase();

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

@@ -1,12 +1,14 @@
 package com.sparrowwallet.sparrow.control;
 
 import com.github.sarxos.webcam.WebcamResolution;
+import com.sparrowwallet.drongo.ExtendedKey;
 import com.sparrowwallet.drongo.Utils;
 import com.sparrowwallet.drongo.address.Address;
 import com.sparrowwallet.drongo.protocol.Base43;
 import com.sparrowwallet.drongo.protocol.Transaction;
 import com.sparrowwallet.drongo.psbt.PSBT;
 import com.sparrowwallet.drongo.uri.BitcoinURI;
+import com.sparrowwallet.sparrow.AppController;
 import com.sparrowwallet.sparrow.ur.ResultType;
 import com.sparrowwallet.sparrow.ur.UR;
 import com.sparrowwallet.sparrow.ur.URDecoder;
@@ -34,11 +36,12 @@ public class QRScanDialog extends Dialog<QRScanDialog.Result> {
         WebcamView webcamView = new WebcamView(webcamService);
 
         final DialogPane dialogPane = getDialogPane();
+        AppController.setStageIcon(dialogPane.getScene().getWindow());
 
         StackPane stackPane = new StackPane();
         stackPane.getChildren().add(webcamView.getView());
 
-        dialogPane.setContent(Borders.wrap(stackPane).lineBorder().outerPadding(0).innerPadding(0).buildAll());
+        dialogPane.setContent(Borders.wrap(stackPane).lineBorder().buildAll());
 
         webcamService.resultProperty().addListener(new QRResultListener());
         webcamService.setOnFailed(failedEvent -> {
@@ -73,7 +76,8 @@ public class QRScanDialog extends Dialog<QRScanDialog.Result> {
                 if(decoder.getResult() != null) {
                     URDecoder.Result urResult = decoder.getResult();
                     if(urResult.type == ResultType.SUCCESS) {
-                        if(urResult.ur.getType().equals(UR.BYTES_TYPE)) {
+                        //TODO: Confirm once UR type registry is updated
+                        if(urResult.ur.getType().contains(UR.BYTES_TYPE) || urResult.ur.getType().equals(UR.CRYPTO_PSBT_TYPE)) {
                             try {
                                 PSBT psbt = new PSBT(urResult.ur.toBytes());
                                 result = new Result(psbt);
@@ -103,6 +107,15 @@ public class QRScanDialog extends Dialog<QRScanDialog.Result> {
                 Transaction transaction;
                 BitcoinURI bitcoinURI;
                 Address address;
+                ExtendedKey extendedKey;
+                try {
+                    extendedKey = ExtendedKey.fromDescriptor(qrtext);
+                    result = new Result(extendedKey);
+                    return;
+                } catch(Exception e) {
+                    //Ignore, not a valid xpub
+                }
+
                 try {
                     bitcoinURI = new BitcoinURI(qrtext);
                     result = new Result(bitcoinURI);
@@ -177,6 +190,7 @@ public class QRScanDialog extends Dialog<QRScanDialog.Result> {
         public final Transaction transaction;
         public final PSBT psbt;
         public final BitcoinURI uri;
+        public final ExtendedKey extendedKey;
         public final String error;
         public final Throwable exception;
 
@@ -184,6 +198,7 @@ public class QRScanDialog extends Dialog<QRScanDialog.Result> {
             this.transaction = transaction;
             this.psbt = null;
             this.uri = null;
+            this.extendedKey = null;
             this.error = null;
             this.exception = null;
         }
@@ -192,6 +207,7 @@ public class QRScanDialog extends Dialog<QRScanDialog.Result> {
             this.transaction = null;
             this.psbt = psbt;
             this.uri = null;
+            this.extendedKey = null;
             this.error = null;
             this.exception = null;
         }
@@ -200,6 +216,7 @@ public class QRScanDialog extends Dialog<QRScanDialog.Result> {
             this.transaction = null;
             this.psbt = null;
             this.uri = uri;
+            this.extendedKey = null;
             this.error = null;
             this.exception = null;
         }
@@ -208,6 +225,16 @@ public class QRScanDialog extends Dialog<QRScanDialog.Result> {
             this.transaction = null;
             this.psbt = null;
             this.uri = BitcoinURI.fromAddress(address);
+            this.extendedKey = null;
+            this.error = null;
+            this.exception = null;
+        }
+
+        public Result(ExtendedKey extendedKey) {
+            this.transaction = null;
+            this.psbt = null;
+            this.uri = null;
+            this.extendedKey = extendedKey;
             this.error = null;
             this.exception = null;
         }
@@ -216,6 +243,7 @@ public class QRScanDialog extends Dialog<QRScanDialog.Result> {
             this.transaction = null;
             this.psbt = null;
             this.uri = null;
+            this.extendedKey = null;
             this.error = error;
             this.exception = null;
         }
@@ -224,6 +252,7 @@ public class QRScanDialog extends Dialog<QRScanDialog.Result> {
             this.transaction = null;
             this.psbt = null;
             this.uri = null;
+            this.extendedKey = null;
             this.error = null;
             this.exception = exception;
         }

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

@@ -2,7 +2,6 @@ package com.sparrowwallet.sparrow.control;
 
 import com.sparrowwallet.drongo.protocol.Script;
 import com.sparrowwallet.drongo.protocol.ScriptChunk;
-import com.sparrowwallet.sparrow.transaction.ScriptContextMenu;
 import javafx.geometry.Pos;
 import org.controlsfx.control.decoration.Decorator;
 import org.controlsfx.control.decoration.GraphicDecoration;

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

@@ -1,4 +1,4 @@
-package com.sparrowwallet.sparrow.transaction;
+package com.sparrowwallet.sparrow.control;
 
 import com.sparrowwallet.drongo.protocol.Script;
 import com.sparrowwallet.drongo.protocol.ScriptChunk;
@@ -33,7 +33,7 @@ public class ScriptContextMenu extends ContextMenu {
         });
 
         getItems().add(copyvalue);
-        this.setStyle("-fx-background-color: -fx-color; -fx-font-family: sans-serif; -fx-font-size: 1em;");
+        this.setStyle("-fx-background-color: -fx-color; -fx-font-family: System; -fx-font-size: 1em;");
 
         area.addEventHandler(ContextMenuEvent.CONTEXT_MENU_REQUESTED, event -> {
             hoverChunk = null;

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

@@ -11,6 +11,7 @@ public class SeedDisplayDialog extends Dialog<Void> {
     public SeedDisplayDialog(Keystore decryptedKeystore) {
         final DialogPane dialogPane = getDialogPane();
         dialogPane.getStylesheets().add(AppController.class.getResource("general.css").toExternalForm());
+        AppController.setStageIcon(dialogPane.getScene().getWindow());
 
         int lines = decryptedKeystore.getSeed().getMnemonicCode().size() / 3;
         int height = lines * 40;

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

@@ -1,5 +1,6 @@
 package com.sparrowwallet.sparrow.control;
 
+import com.sparrowwallet.drongo.protocol.TransactionSignature;
 import com.sparrowwallet.drongo.wallet.Keystore;
 import com.sparrowwallet.sparrow.EventManager;
 import com.sparrowwallet.sparrow.event.KeystoreSignedEvent;
@@ -7,8 +8,8 @@ import javafx.animation.KeyFrame;
 import javafx.animation.KeyValue;
 import javafx.animation.Timeline;
 import javafx.beans.property.SimpleObjectProperty;
-import javafx.collections.ListChangeListener;
-import javafx.collections.ObservableList;
+import javafx.collections.MapChangeListener;
+import javafx.collections.ObservableMap;
 import javafx.geometry.Insets;
 import javafx.geometry.Orientation;
 import javafx.geometry.Pos;
@@ -18,6 +19,9 @@ import javafx.scene.layout.StackPane;
 import javafx.util.Duration;
 import org.controlsfx.control.SegmentedBar;
 
+import java.util.ArrayList;
+import java.util.List;
+
 public class SignaturesProgressBar extends SegmentedBar<SignaturesProgressBar.SignatureProgressSegment> {
     public SignaturesProgressBar() {
         setOrientation(Orientation.HORIZONTAL);
@@ -25,10 +29,11 @@ public class SignaturesProgressBar extends SegmentedBar<SignaturesProgressBar.Si
         setInfoNodeFactory(segment -> segment.getKeystore() == null ? null : new SignatureProgressSegmentLabel(segment.getKeystore().getLabel()));
     }
 
-    public void initialize(ObservableList<Keystore> signedKeystores, int threshold) {
+    public void initialize(ObservableMap<TransactionSignature, Keystore> signatureKeystoreMap, int threshold) {
         getStyleClass().add("signatures-progress-bar");
         getSegments().clear();
 
+        List<Keystore> signedKeystores = new ArrayList<>(signatureKeystoreMap.values());
         int numSegments = Math.max(threshold, signedKeystores.size());
         double segmentSize = 100d / numSegments;
         for(int i = 0; i < numSegments; i++) {
@@ -39,19 +44,20 @@ public class SignaturesProgressBar extends SegmentedBar<SignaturesProgressBar.Si
             }
         }
 
-        signedKeystores.addListener((ListChangeListener<Keystore>) c -> {
-            int numSegments1 = Math.max(threshold, c.getList().size());
-            double newSegmentSize = 100d / numSegments1;
+        signatureKeystoreMap.addListener((MapChangeListener<TransactionSignature, Keystore>) c -> {
+            List<Keystore> newSignedKeystores = new ArrayList<>(c.getMap().values());
+            int newNumSegments = Math.max(threshold, newSignedKeystores.size());
+            double newSegmentSize = 100d / newNumSegments;
 
-            for(int i = 0; i < numSegments1; i++) {
+            for(int i = 0; i < newNumSegments; i++) {
                 SignatureProgressSegment segment = null;
                 if(i < getSegments().size()) {
                     segment = getSegments().get(i);
                 }
 
                 Keystore signedKeystore = null;
-                if(i < signedKeystores.size()) {
-                    signedKeystore = signedKeystores.get(i);
+                if(i < newSignedKeystores.size()) {
+                    signedKeystore = newSignedKeystores.get(i);
                 }
 
                 if(segment != null) {

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

@@ -1,9 +1,11 @@
 package com.sparrowwallet.sparrow.control;
 
+import com.sparrowwallet.sparrow.AppController;
 import javafx.application.Platform;
 import javafx.beans.NamedArg;
 import javafx.scene.control.*;
 import javafx.scene.layout.HBox;
+import javafx.scene.layout.Priority;
 
 public class TextAreaDialog extends Dialog<String> {
     private final TextArea textArea;
@@ -20,11 +22,15 @@ public class TextAreaDialog extends Dialog<String> {
         this.textArea = new TextArea(defaultValue);
         this.textArea.setMaxWidth(Double.MAX_VALUE);
         this.textArea.setWrapText(true);
+        this.textArea.getStyleClass().add("fixed-width");
         hbox.getChildren().add(textArea);
+        HBox.setHgrow(this.textArea, Priority.ALWAYS);
 
         this.defaultValue = defaultValue;
 
-        getDialogPane().setContent(hbox);
+        dialogPane.setContent(hbox);
+        dialogPane.getStylesheets().add(AppController.class.getResource("general.css").toExternalForm());
+        AppController.setStageIcon(dialogPane.getScene().getWindow());
 
         dialogPane.getStyleClass().add("text-input-dialog");
         dialogPane.getButtonTypes().addAll(ButtonType.OK, ButtonType.CANCEL);
@@ -35,6 +41,9 @@ public class TextAreaDialog extends Dialog<String> {
             ButtonBar.ButtonData data = dialogButton == null ? null : dialogButton.getButtonData();
             return data == ButtonBar.ButtonData.OK_DONE ? textArea.getText() : null;
         });
+
+        dialogPane.setPrefWidth(700);
+        dialogPane.setPrefHeight(400);
     }
 
     public final TextArea getEditor() {

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

@@ -88,7 +88,7 @@ public class TitledDescriptionPane extends TitledPane {
 
         this.layoutBoundsProperty().addListener((observable, oldValue, newValue) -> {
             //Hack to force listItem to expand to full available width less border
-            listItem.setPrefWidth(newValue.getWidth() - 2);
+            listItem.setPrefWidth(newValue.getWidth() - 3);
         });
 
         return listItem;

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

@@ -4,16 +4,21 @@ import com.sparrowwallet.drongo.protocol.Sha256Hash;
 import com.sparrowwallet.drongo.wallet.BlockTransactionHashIndex;
 import com.sparrowwallet.drongo.wallet.WalletNode;
 import com.sparrowwallet.drongo.wallet.WalletTransaction;
+import com.sparrowwallet.sparrow.EventManager;
+import com.sparrowwallet.sparrow.event.ExcludeUtxoEvent;
 import com.sparrowwallet.sparrow.glyphfont.FontAwesome5;
 import javafx.geometry.Insets;
 import javafx.geometry.Pos;
 import javafx.scene.Group;
 import javafx.scene.Node;
+import javafx.scene.control.Button;
+import javafx.scene.control.ContentDisplay;
 import javafx.scene.control.Label;
 import javafx.scene.control.Tooltip;
 import javafx.scene.layout.*;
 import javafx.scene.shape.CubicCurve;
 import javafx.scene.shape.Line;
+import javafx.util.Duration;
 import org.controlsfx.glyphfont.FontAwesome;
 import org.controlsfx.glyphfont.Glyph;
 
@@ -22,6 +27,7 @@ import java.util.*;
 public class TransactionDiagram extends GridPane {
     private static final int MAX_UTXOS = 8;
     private static final double DIAGRAM_HEIGHT = 230.0;
+    private static final int TOOLTIP_SHOW_DELAY = 50;
 
     private WalletTransaction walletTx;
 
@@ -146,14 +152,24 @@ public class TransactionDiagram extends GridPane {
             WalletNode walletNode = displayedUtxos.get(input);
             String desc = getInputDescription(input);
             Label label = new Label(desc);
+            label.getStyleClass().add("utxo-label");
+
+            Button excludeUtxoButton = new Button("");
+            excludeUtxoButton.setGraphic(getExcludeGlyph());
+            excludeUtxoButton.setOnAction(event -> {
+                EventManager.get().post(new ExcludeUtxoEvent(walletTx, input));
+            });
+
+            label.setGraphic(excludeUtxoButton);
+            label.setContentDisplay(ContentDisplay.LEFT);
 
             Tooltip tooltip = new Tooltip();
             if(walletNode != null) {
                 tooltip.setText("Spending " + getSatsValue(input.getValue()) + " sats from " + walletNode.getDerivationPath() + "\n" + input.getHashAsString() + ":" + input.getIndex() + "\n" + walletTx.getWallet().getAddress(walletNode));
+                tooltip.getStyleClass().add("input-label");
+
                 if(input.getLabel() == null || input.getLabel().isEmpty()) {
                     label.getStyleClass().add("input-label");
-                } else {
-                    tooltip.getStyleClass().add("input-label");
                 }
             } else {
                 AdditionalBlockTransactionHashIndex additionalReference = (AdditionalBlockTransactionHashIndex)input;
@@ -164,6 +180,7 @@ public class TransactionDiagram extends GridPane {
                 tooltip.setText(joiner.toString());
                 tooltip.getStyleClass().add("input-label");
             }
+            tooltip.setShowDelay(new Duration(TOOLTIP_SHOW_DELAY));
             label.setTooltip(tooltip);
 
             inputsBox.getChildren().add(label);
@@ -270,10 +287,13 @@ public class TransactionDiagram extends GridPane {
         outputsBox.setAlignment(Pos.CENTER_LEFT);
         outputsBox.getChildren().add(createSpacer());
 
+        boolean isConsolidation = walletTx.isConsolidationSend();
         String recipientDesc = walletTx.getRecipientAddress().toString().substring(0, 8) + "...";
-        Label recipientLabel = new Label(recipientDesc, getSendGlyph());
+        Label recipientLabel = new Label(recipientDesc, isConsolidation ? getConsolidationGlyph() : getPaymentGlyph());
         recipientLabel.getStyleClass().addAll("output-label", "recipient-label");
-        Tooltip recipientTooltip = new Tooltip("Send " + getSatsValue(walletTx.getRecipientAmount()) + " sats to\n" + walletTx.getRecipientAddress().toString());
+        Tooltip recipientTooltip = new Tooltip((isConsolidation ? "Consolidate " : "Pay ") + getSatsValue(walletTx.getRecipientAmount()) + " sats to\n" + walletTx.getRecipientAddress().toString());
+        recipientTooltip.getStyleClass().add("recipient-label");
+        recipientTooltip.setShowDelay(new Duration(TOOLTIP_SHOW_DELAY));
         recipientLabel.setTooltip(recipientTooltip);
         outputsBox.getChildren().add(recipientLabel);
         outputsBox.getChildren().add(createSpacer());
@@ -283,6 +303,8 @@ public class TransactionDiagram extends GridPane {
             Label changeLabel = new Label(changeDesc, getChangeGlyph());
             changeLabel.getStyleClass().addAll("output-label", "change-label");
             Tooltip changeTooltip = new Tooltip("Change of " + getSatsValue(walletTx.getChangeAmount()) + " sats to " + walletTx.getChangeNode().getDerivationPath() + "\n" + walletTx.getChangeAddress().toString());
+            changeTooltip.getStyleClass().add("change-label");
+            changeTooltip.setShowDelay(new Duration(TOOLTIP_SHOW_DELAY));
             changeLabel.setTooltip(changeTooltip);
             outputsBox.getChildren().add(changeLabel);
             outputsBox.getChildren().add(createSpacer());
@@ -294,6 +316,7 @@ public class TransactionDiagram extends GridPane {
         String percentage = String.format("%.2f", walletTx.getFeePercentage() * 100.0);
         Tooltip feeTooltip = new Tooltip("Fee of " + getSatsValue(walletTx.getFee()) + " sats (" + percentage + "%)");
         feeTooltip.getStyleClass().add("fee-tooltip");
+        feeTooltip.setShowDelay(new Duration(TOOLTIP_SHOW_DELAY));
         feeLabel.setTooltip(feeTooltip);
         outputsBox.getChildren().add(feeLabel);
         outputsBox.getChildren().add(createSpacer());
@@ -323,36 +346,50 @@ public class TransactionDiagram extends GridPane {
         return spacer;
     }
 
-    private Glyph getSendGlyph() {
-        Glyph sendGlyph = new Glyph("FontAwesome", FontAwesome.Glyph.SEND);
-        sendGlyph.getStyleClass().add("send-icon");
-        sendGlyph.setFontSize(12);
-        return sendGlyph;
+    public static Glyph getExcludeGlyph() {
+        Glyph excludeGlyph = new Glyph(FontAwesome5.FONT_NAME, FontAwesome5.Glyph.TIMES_CIRCLE);
+        excludeGlyph.getStyleClass().add("exclude-utxo");
+        excludeGlyph.setFontSize(12);
+        return excludeGlyph;
     }
 
-    private Glyph getChangeGlyph() {
-        Glyph changeGlyph = new Glyph("Font Awesome 5 Free Solid", FontAwesome5.Glyph.COINS);
+    public static Glyph getPaymentGlyph() {
+        Glyph paymentGlyph = new Glyph("FontAwesome", FontAwesome.Glyph.SEND);
+        paymentGlyph.getStyleClass().add("payment-icon");
+        paymentGlyph.setFontSize(12);
+        return paymentGlyph;
+    }
+
+    public static Glyph getConsolidationGlyph() {
+        Glyph consolidationGlyph = new Glyph(FontAwesome5.FONT_NAME, FontAwesome5.Glyph.REPLY_ALL);
+        consolidationGlyph.getStyleClass().add("consolidation-icon");
+        consolidationGlyph.setFontSize(12);
+        return consolidationGlyph;
+    }
+
+    public static Glyph getChangeGlyph() {
+        Glyph changeGlyph = new Glyph(FontAwesome5.FONT_NAME, FontAwesome5.Glyph.COINS);
         changeGlyph.getStyleClass().add("change-icon");
         changeGlyph.setFontSize(12);
         return changeGlyph;
     }
 
     private Glyph getFeeGlyph() {
-        Glyph feeGlyph = new Glyph("Font Awesome 5 Free Solid", FontAwesome5.Glyph.HAND_HOLDING);
+        Glyph feeGlyph = new Glyph(FontAwesome5.FONT_NAME, FontAwesome5.Glyph.HAND_HOLDING);
         feeGlyph.getStyleClass().add("fee-icon");
         feeGlyph.setFontSize(12);
         return feeGlyph;
     }
 
     private Glyph getWarningGlyph() {
-        Glyph feeWarningGlyph = new Glyph("Font Awesome 5 Free Solid", FontAwesome5.Glyph.EXCLAMATION_CIRCLE);
+        Glyph feeWarningGlyph = new Glyph(FontAwesome5.FONT_NAME, FontAwesome5.Glyph.EXCLAMATION_CIRCLE);
         feeWarningGlyph.getStyleClass().add("fee-warning-icon");
         feeWarningGlyph.setFontSize(12);
         return feeWarningGlyph;
     }
 
     private Glyph getLockGlyph() {
-        Glyph lockGlyph = new Glyph("Font Awesome 5 Free Solid", FontAwesome5.Glyph.LOCK);
+        Glyph lockGlyph = new Glyph(FontAwesome5.FONT_NAME, FontAwesome5.Glyph.LOCK);
         lockGlyph.getStyleClass().add("lock-icon");
         lockGlyph.setFontSize(12);
         return lockGlyph;

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

@@ -23,8 +23,9 @@ public class TransactionIdDialog extends Dialog<Sha256Hash> {
 
     public TransactionIdDialog() {
         this.txid = (CustomTextField) TextFields.createClearableTextField();
-        txid.setFont(Font.font ("Courier", txid.getFont().getSize()));
+        txid.setFont(AppController.getMonospaceFont());
         final DialogPane dialogPane = getDialogPane();
+        AppController.setStageIcon(dialogPane.getScene().getWindow());
 
         setTitle("Load Transaction");
         dialogPane.setHeaderText("Enter the transaction ID:");

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

@@ -3,13 +3,10 @@ package com.sparrowwallet.sparrow.control;
 import com.google.common.eventbus.Subscribe;
 import com.sparrowwallet.drongo.policy.PolicyType;
 import com.sparrowwallet.drongo.wallet.Wallet;
+import com.sparrowwallet.sparrow.AppController;
 import com.sparrowwallet.sparrow.EventManager;
 import com.sparrowwallet.sparrow.event.WalletExportEvent;
-import com.sparrowwallet.sparrow.event.WalletImportEvent;
-import com.sparrowwallet.sparrow.io.ColdcardMultisig;
-import com.sparrowwallet.sparrow.io.Electrum;
-import com.sparrowwallet.sparrow.io.WalletExport;
-import com.sparrowwallet.sparrow.io.WalletImport;
+import com.sparrowwallet.sparrow.io.*;
 import javafx.scene.control.*;
 import javafx.scene.layout.AnchorPane;
 import javafx.scene.layout.StackPane;
@@ -26,6 +23,7 @@ public class WalletExportDialog extends Dialog<Wallet> {
         });
 
         final DialogPane dialogPane = getDialogPane();
+        AppController.setStageIcon(dialogPane.getScene().getWindow());
 
         StackPane stackPane = new StackPane();
         dialogPane.setContent(stackPane);
@@ -34,7 +32,7 @@ public class WalletExportDialog extends Dialog<Wallet> {
         stackPane.getChildren().add(anchorPane);
 
         ScrollPane scrollPane = new ScrollPane();
-        scrollPane.setPrefHeight(280);
+        scrollPane.setPrefHeight(400);
         scrollPane.setHbarPolicy(ScrollPane.ScrollBarPolicy.NEVER);
         anchorPane.getChildren().add(scrollPane);
         scrollPane.setFitToWidth(true);
@@ -43,9 +41,9 @@ public class WalletExportDialog extends Dialog<Wallet> {
 
         List<WalletExport> exporters;
         if(wallet.getPolicyType() == PolicyType.SINGLE) {
-            exporters = List.of(new Electrum());
+            exporters = List.of(new Electrum(), new Specter());
         } else if(wallet.getPolicyType() == PolicyType.MULTI) {
-            exporters = List.of(new ColdcardMultisig(), new Electrum());
+            exporters = List.of(new ColdcardMultisig(), new CoboVaultMultisig(), new Electrum(), new Specter());
         } else {
             throw new UnsupportedOperationException("Cannot export wallet with policy type " + wallet.getPolicyType());
         }
@@ -60,7 +58,7 @@ public class WalletExportDialog extends Dialog<Wallet> {
         final ButtonType cancelButtonType = new javafx.scene.control.ButtonType("Cancel", ButtonBar.ButtonData.CANCEL_CLOSE);
         dialogPane.getButtonTypes().addAll(cancelButtonType);
         dialogPane.setPrefWidth(500);
-        dialogPane.setPrefHeight(360);
+        dialogPane.setPrefHeight(480);
 
         setResultConverter(dialogButton -> dialogButton != cancelButtonType ? wallet : null);
     }

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

@@ -2,6 +2,7 @@ package com.sparrowwallet.sparrow.control;
 
 import com.google.common.eventbus.Subscribe;
 import com.sparrowwallet.drongo.wallet.Wallet;
+import com.sparrowwallet.sparrow.AppController;
 import com.sparrowwallet.sparrow.EventManager;
 import com.sparrowwallet.sparrow.event.WalletImportEvent;
 import com.sparrowwallet.sparrow.io.*;
@@ -21,6 +22,7 @@ public class WalletImportDialog extends Dialog<Wallet> {
         });
 
         final DialogPane dialogPane = getDialogPane();
+        AppController.setStageIcon(dialogPane.getScene().getWindow());
 
         StackPane stackPane = new StackPane();
         dialogPane.setContent(stackPane);
@@ -29,16 +31,22 @@ public class WalletImportDialog extends Dialog<Wallet> {
         stackPane.getChildren().add(anchorPane);
 
         ScrollPane scrollPane = new ScrollPane();
-        scrollPane.setPrefHeight(280);
+        scrollPane.setPrefHeight(420);
         scrollPane.setHbarPolicy(ScrollPane.ScrollBarPolicy.NEVER);
         anchorPane.getChildren().add(scrollPane);
         scrollPane.setFitToWidth(true);
         AnchorPane.setLeftAnchor(scrollPane, 0.0);
         AnchorPane.setRightAnchor(scrollPane, 0.0);
 
-        List<WalletImport> importers = List.of(new ColdcardMultisig(), new Electrum());
         Accordion importAccordion = new Accordion();
-        for(WalletImport importer : importers) {
+        List<KeystoreFileImport> keystoreImporters = List.of(new ColdcardSinglesig(), new CoboVaultSinglesig());
+        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 Specter());
+        for(WalletImport importer : walletImporters) {
             FileWalletImportPane importPane = new FileWalletImportPane(importer);
             importAccordion.getPanes().add(importPane);
         }
@@ -47,7 +55,7 @@ public class WalletImportDialog extends Dialog<Wallet> {
         final ButtonType cancelButtonType = new javafx.scene.control.ButtonType("Cancel", ButtonBar.ButtonData.CANCEL_CLOSE);
         dialogPane.getButtonTypes().addAll(cancelButtonType);
         dialogPane.setPrefWidth(500);
-        dialogPane.setPrefHeight(360);
+        dialogPane.setPrefHeight(500);
 
         setResultConverter(dialogButton -> dialogButton != cancelButtonType ? wallet : null);
     }

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

@@ -22,6 +22,7 @@ public class WalletNameDialog extends Dialog<String> {
     public WalletNameDialog() {
         this.name = (CustomTextField)TextFields.createClearableTextField();
         final DialogPane dialogPane = getDialogPane();
+        AppController.setStageIcon(dialogPane.getScene().getWindow());
 
         setTitle("Wallet Name");
         dialogPane.setHeaderText("Enter a name for this wallet:");

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

@@ -21,6 +21,7 @@ public class WalletPasswordDialog extends Dialog<SecureString> {
     private final CustomPasswordField password;
     private final CustomPasswordField passwordConfirm;
     private final CheckBox backupExisting;
+    private final CheckBox changePassword;
 
     public WalletPasswordDialog(PasswordRequirement requirement) {
         this(null, requirement);
@@ -31,11 +32,13 @@ public class WalletPasswordDialog extends Dialog<SecureString> {
         this.password = (CustomPasswordField)TextFields.createClearablePasswordField();
         this.passwordConfirm = (CustomPasswordField)TextFields.createClearablePasswordField();
         this.backupExisting = new CheckBox("Backup existing wallet first");
+        this.changePassword = new CheckBox("Change password");
 
         final DialogPane dialogPane = getDialogPane();
         setTitle("Wallet Password" + (walletName != null ? " - " + walletName : ""));
         dialogPane.setHeaderText(walletName != null ? requirement.description.substring(0, requirement.description.length() - 1) + " for " + walletName + ":" : requirement.description);
         dialogPane.getStylesheets().add(AppController.class.getResource("general.css").toExternalForm());
+        AppController.setStageIcon(dialogPane.getScene().getWindow());
         dialogPane.getButtonTypes().addAll(ButtonType.CANCEL);
         dialogPane.setPrefWidth(380);
         dialogPane.setPrefHeight(260);
@@ -54,6 +57,10 @@ public class WalletPasswordDialog extends Dialog<SecureString> {
             backupExisting.setSelected(true);
         }
 
+        if(requirement == PasswordRequirement.UPDATE_SET) {
+            content.getChildren().add(changePassword);
+        }
+
         dialogPane.setContent(content);
 
         ValidationSupport validationSupport = new ValidationSupport();
@@ -69,12 +76,12 @@ public class WalletPasswordDialog extends Dialog<SecureString> {
         BooleanBinding isInvalid = Bindings.createBooleanBinding(() -> passwordConfirm.isVisible() && !password.getText().equals(passwordConfirm.getText()), password.textProperty(), passwordConfirm.textProperty());
         okButton.disableProperty().bind(isInvalid);
 
-        if(requirement != PasswordRequirement.UPDATE_NEW) {
+        if(requirement != PasswordRequirement.UPDATE_NEW && requirement != PasswordRequirement.UPDATE_CHANGE) {
             passwordConfirm.setVisible(false);
             passwordConfirm.setManaged(false);
         }
 
-        if(requirement == PasswordRequirement.UPDATE_NEW || requirement == PasswordRequirement.UPDATE_EMPTY) {
+        if(requirement == PasswordRequirement.UPDATE_NEW || requirement == PasswordRequirement.UPDATE_EMPTY || requirement == PasswordRequirement.UPDATE_CHANGE) {
             password.textProperty().addListener((observable, oldValue, newValue) -> {
                 if(newValue.isEmpty()) {
                     okButton.setText("No Password");
@@ -99,11 +106,16 @@ public class WalletPasswordDialog extends Dialog<SecureString> {
         return backupExisting.isSelected();
     }
 
+    public boolean isChangePassword() {
+        return changePassword.isSelected();
+    }
+
     public enum PasswordRequirement {
         LOAD("Please enter the wallet password:", "Unlock"),
         UPDATE_NEW("Add a password to the wallet?\nLeave empty for none:", "No Password"),
         UPDATE_EMPTY("This wallet has no password.\nAdd a password to the wallet?\nLeave empty for none:", "No Password"),
-        UPDATE_SET("Please re-enter the wallet password:", "Verify Password");
+        UPDATE_SET("Please re-enter the wallet password:", "Verify Password"),
+        UPDATE_CHANGE("Enter the new wallet password.\nLeave empty for none:", "No Password");
 
         private final String description;
         private final String okButtonText;

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

@@ -28,6 +28,7 @@ public class WelcomeDialog extends Dialog<Mode> {
         setTitle("Welcome to Sparrow");
         dialogPane.setHeaderText("Welcome to Sparrow!");
         dialogPane.getStylesheets().add(AppController.class.getResource("general.css").toExternalForm());
+        AppController.setStageIcon(dialogPane.getScene().getWindow());
         dialogPane.setPrefWidth(600);
         dialogPane.setPrefHeight(480);
 
@@ -70,7 +71,8 @@ public class WelcomeDialog extends Dialog<Mode> {
     }
 
     private HyperlinkLabel createBulletedLink(String name, String url) {
-        HyperlinkLabel label = new HyperlinkLabel(" \u2022 [" + name + "]");
+        String[] nameParts = name.split(" ");
+        HyperlinkLabel label = new HyperlinkLabel(" \u2022 [" + nameParts[0] + "] " + (nameParts.length > 1 ? nameParts[1] : ""));
         label.setOnAction(event -> {
             hostServices.showDocument(url);
         });
@@ -88,6 +90,8 @@ public class WelcomeDialog extends Dialog<Mode> {
 
     private ToggleSwitch createToggle(StatusBar statusBar, ButtonType onlineButtonType, ButtonType offlineButtonType) {
         ToggleSwitch toggleSwitch = new UnlabeledToggleSwitch();
+        toggleSwitch.setStyle("-fx-padding: 1px 0 0 0");
+
         toggleSwitch.selectedProperty().addListener((observable, oldValue, newValue) -> {
             Button onlineButton = (Button) getDialogPane().lookupButton(onlineButtonType);
             onlineButton.setDefaultButton(newValue);

src/main/java/com/sparrowwallet/sparrow/event/ConnectionEvent.java

@@ -10,13 +10,15 @@ public class ConnectionEvent extends FeeRatesUpdatedEvent {
     private final String serverBanner;
     private final int blockHeight;
     private final BlockHeader blockHeader;
+    private final Double minimumRelayFeeRate;
 
-    public ConnectionEvent(List<String> serverVersion, String serverBanner, int blockHeight, BlockHeader blockHeader, Map<Integer, Double> targetBlockFeeRates) {
+    public ConnectionEvent(List<String> serverVersion, String serverBanner, int blockHeight, BlockHeader blockHeader, Map<Integer, Double> targetBlockFeeRates, Double minimumRelayFeeRate) {
         super(targetBlockFeeRates);
         this.serverVersion = serverVersion;
         this.serverBanner = serverBanner;
         this.blockHeight = blockHeight;
         this.blockHeader = blockHeader;
+        this.minimumRelayFeeRate = minimumRelayFeeRate;
     }
 
     public List<String> getServerVersion() {
@@ -34,4 +36,8 @@ public class ConnectionEvent extends FeeRatesUpdatedEvent {
     public BlockHeader getBlockHeader() {
         return blockHeader;
     }
+
+    public Double getMinimumRelayFeeRate() {
+        return minimumRelayFeeRate;
+    }
 }

src/main/java/com/sparrowwallet/sparrow/event/ExcludeUtxoEvent.java

@@ -0,0 +1,22 @@
+package com.sparrowwallet.sparrow.event;
+
+import com.sparrowwallet.drongo.wallet.BlockTransactionHashIndex;
+import com.sparrowwallet.drongo.wallet.WalletTransaction;
+
+public class ExcludeUtxoEvent {
+    private final WalletTransaction walletTransaction;
+    private final BlockTransactionHashIndex utxo;
+
+    public ExcludeUtxoEvent(WalletTransaction walletTransaction, BlockTransactionHashIndex utxo) {
+        this.walletTransaction = walletTransaction;
+        this.utxo = utxo;
+    }
+
+    public WalletTransaction getWalletTransaction() {
+        return walletTransaction;
+    }
+
+    public BlockTransactionHashIndex getUtxo() {
+        return utxo;
+    }
+}

src/main/java/com/sparrowwallet/sparrow/event/MessageSignedEvent.java

@@ -0,0 +1,25 @@
+package com.sparrowwallet.sparrow.event;
+
+import com.sparrowwallet.drongo.wallet.Wallet;
+
+/**
+ * This event is used by the DeviceSignMessageDialog to indicate that a USB device has signed a message
+ *
+ */
+public class MessageSignedEvent {
+    private final Wallet wallet;
+    private final String signature;
+
+    public MessageSignedEvent(Wallet wallet, String signature) {
+        this.wallet = wallet;
+        this.signature = signature;
+    }
+
+    public Wallet getWallet() {
+        return wallet;
+    }
+
+    public String getSignature() {
+        return signature;
+    }
+}

src/main/java/com/sparrowwallet/sparrow/event/SettingsChangedEvent.java

@@ -20,6 +20,6 @@ public class SettingsChangedEvent {
     }
 
     public enum Type {
-        POLICY, SCRIPT_TYPE, MUTLISIG_THRESHOLD, MULTISIG_TOTAL, KEYSTORE_LABEL, KEYSTORE_FINGERPRINT, KEYSTORE_DERIVATION, KEYSTORE_XPUB;
+        POLICY, SCRIPT_TYPE, MUTLISIG_THRESHOLD, MULTISIG_TOTAL, KEYSTORE_LABEL, KEYSTORE_FINGERPRINT, KEYSTORE_DERIVATION, KEYSTORE_XPUB, GAP_LIMIT;
     }
 }

src/main/java/com/sparrowwallet/sparrow/event/TorStatusEvent.java

@@ -0,0 +1,13 @@
+package com.sparrowwallet.sparrow.event;
+
+public class TorStatusEvent {
+    private final String status;
+
+    public TorStatusEvent(String status) {
+        this.status = status;
+    }
+
+    public String getStatus() {
+        return status;
+    }
+}

src/main/java/com/sparrowwallet/sparrow/event/VersionCheckStatusEvent.java

@@ -0,0 +1,13 @@
+package com.sparrowwallet.sparrow.event;
+
+public class VersionCheckStatusEvent {
+    private final boolean enabled;
+
+    public VersionCheckStatusEvent(boolean enabled) {
+        this.enabled = enabled;
+    }
+
+    public boolean isEnabled() {
+        return enabled;
+    }
+}

src/main/java/com/sparrowwallet/sparrow/event/VersionUpdatedEvent.java

@@ -0,0 +1,13 @@
+package com.sparrowwallet.sparrow.event;
+
+public class VersionUpdatedEvent {
+    private final String version;
+
+    public VersionUpdatedEvent(String version) {
+        this.version = version;
+    }
+
+    public String getVersion() {
+        return version;
+    }
+}

src/main/java/com/sparrowwallet/sparrow/event/WalletHistoryStatusEvent.java

@@ -0,0 +1,41 @@
+package com.sparrowwallet.sparrow.event;
+
+public class WalletHistoryStatusEvent {
+    private final boolean loaded;
+    private final String statusMessage;
+    private final String errorMessage;
+
+    public WalletHistoryStatusEvent(boolean loaded) {
+        this.loaded = loaded;
+        this.statusMessage = null;
+        this.errorMessage = null;
+    }
+
+    public WalletHistoryStatusEvent(boolean loaded, String statusMessage) {
+        this.loaded = false;
+        this.statusMessage = statusMessage;
+        this.errorMessage = null;
+    }
+
+    public WalletHistoryStatusEvent(String errorMessage) {
+        this.loaded = false;
+        this.statusMessage = null;
+        this.errorMessage = errorMessage;
+    }
+
+    public boolean isLoading() {
+        return !loaded;
+    }
+
+    public boolean isLoaded() {
+        return loaded;
+    }
+
+    public String getStatusMessage() {
+        return statusMessage;
+    }
+
+    public String getErrorMessage() {
+        return errorMessage;
+    }
+}

src/main/java/com/sparrowwallet/sparrow/glyphfont/FontAwesome5.java

@@ -23,6 +23,7 @@ public class FontAwesome5 extends GlyphFont {
         CHECK_CIRCLE('\uf058'),
         CIRCLE('\uf111'),
         COINS('\uf51e'),
+        EXCHANGE_ALT('\uf362'),
         EXCLAMATION_CIRCLE('\uf06a'),
         EXCLAMATION_TRIANGLE('\uf071'),
         EXTERNAL_LINK_ALT('\uf35d'),
@@ -36,9 +37,11 @@ public class FontAwesome5 extends GlyphFont {
         PEN_FANCY('\uf5ac'),
         QRCODE('\uf029'),
         QUESTION_CIRCLE('\uf059'),
+        REPLY_ALL('\uf122'),
         SATELLITE_DISH('\uf7c0'),
         SD_CARD('\uf7c2'),
         SEARCH('\uf002'),
+        TIMES_CIRCLE('\uf057'),
         TOOLS('\uf7d9'),
         UNDO('\uf0e2'),
         WALLET('\uf555');

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

@@ -0,0 +1,55 @@
+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 CoboVaultMultisig extends ColdcardMultisig {
+    @Override
+    public String getName() {
+        return "Cobo Vault Multisig";
+    }
+
+    @Override
+    public WalletModel getWalletModel() {
+        return WalletModel.COBO_VAULT;
+    }
+
+    @Override
+    public Keystore getKeystore(ScriptType scriptType, InputStream inputStream, String password) throws ImportException {
+        Keystore keystore = super.getKeystore(scriptType, inputStream, password);
+        keystore.setLabel("Cobo Vault");
+        keystore.setWalletModel(getWalletModel());
+
+        return keystore;
+    }
+
+    @Override
+    public String getKeystoreImportDescription() {
+        return "Import file created by using the Multisig Wallet > Show/Export XPUB > Export All > Export feature on your Cobo Vault.";
+    }
+
+    @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", "Cobo Vault"));
+            keystore.setWalletModel(WalletModel.COBO_VAULT);
+        }
+
+        return wallet;
+    }
+
+    @Override
+    public String getWalletImportDescription() {
+        return "Import file created by using the Multisig Wallet > Create Multisig Wallet feature on your Cobo Vault.";
+    }
+
+    @Override
+    public String getWalletExportDescription() {
+        return "Export file that can be read by your Cobo Vault using the Multisig Wallet > Import Multisig Wallet feature.";
+    }
+}

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

@@ -0,0 +1,33 @@
+package com.sparrowwallet.sparrow.io;
+
+import com.sparrowwallet.drongo.protocol.ScriptType;
+import com.sparrowwallet.drongo.wallet.Keystore;
+import com.sparrowwallet.drongo.wallet.WalletModel;
+
+import java.io.InputStream;
+
+public class CoboVaultSinglesig extends ColdcardSinglesig {
+    @Override
+    public String getName() {
+        return "Cobo Vault";
+    }
+
+    @Override
+    public String getKeystoreImportDescription() {
+        return "Import file created by using the Watch-Only Wallet > Generic Wallet > Export Wallet feature on your Cobo Vault.";
+    }
+
+    @Override
+    public WalletModel getWalletModel() {
+        return WalletModel.COBO_VAULT;
+    }
+
+    @Override
+    public Keystore getKeystore(ScriptType scriptType, InputStream inputStream, String password) throws ImportException {
+        Keystore keystore = super.getKeystore(scriptType, inputStream, password);
+        keystore.setLabel("Cobo Vault");
+        keystore.setWalletModel(getWalletModel());
+
+        return keystore;
+    }
+}

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

@@ -1,7 +1,6 @@
 package com.sparrowwallet.sparrow.io;
 
 import com.google.common.io.CharStreams;
-import com.google.gson.Gson;
 import com.sparrowwallet.drongo.ExtendedKey;
 import com.sparrowwallet.drongo.KeyDerivation;
 import com.sparrowwallet.drongo.Utils;
@@ -19,8 +18,6 @@ import java.util.List;
 import java.util.Set;
 
 public class ColdcardMultisig implements WalletImport, KeystoreFileImport, WalletExport {
-    private final Gson gson = new Gson();
-
     @Override
     public String getName() {
         return "Coldcard Multisig";
@@ -153,7 +150,7 @@ public class ColdcardMultisig implements WalletImport, KeystoreFileImport, Walle
         }
 
         if(!wallet.getPolicyType().equals(PolicyType.MULTI)) {
-            throw new ExportException("Coldcard multisig import requires a multisig wallet");
+            throw new ExportException(getName() + " import requires a multisig wallet");
         }
 
         boolean multipleDerivations = false;
@@ -167,7 +164,7 @@ public class ColdcardMultisig implements WalletImport, KeystoreFileImport, Walle
 
         try {
             BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(outputStream));
-            writer.append("# Coldcard Multisig setup file (created by Sparrow)\n");
+            writer.append("# " + getName() + " setup file (created by Sparrow)\n");
             writer.append("#\n");
             writer.append("Name: ").append(wallet.getName()).append("\n");
             writer.append("Policy: ").append(Integer.toString(wallet.getDefaultPolicy().getNumSignaturesRequired())).append(" of ").append(Integer.toString(wallet.getKeystores().size())).append("\n");

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

@@ -5,9 +5,12 @@ import com.google.gson.JsonElement;
 import com.google.gson.reflect.TypeToken;
 import com.sparrowwallet.drongo.ExtendedKey;
 import com.sparrowwallet.drongo.KeyDerivation;
+import com.sparrowwallet.drongo.policy.Policy;
+import com.sparrowwallet.drongo.policy.PolicyType;
 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.drongo.wallet.WalletModel;
 
 import java.io.File;
@@ -16,7 +19,7 @@ import java.io.InputStreamReader;
 import java.lang.reflect.Type;
 import java.util.Map;
 
-public class ColdcardSinglesig implements KeystoreFileImport {
+public class ColdcardSinglesig implements KeystoreFileImport, WalletImport {
     @Override
     public String getName() {
         return "Coldcard";
@@ -77,6 +80,29 @@ public class ColdcardSinglesig implements KeystoreFileImport {
         throw new ImportException("Correct derivation not found for script type: " + scriptType);
     }
 
+    @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));
+
+        if(!wallet.isValid()) {
+            throw new ImportException("Wallet is in an inconsistent state.");
+        }
+
+        return wallet;
+    }
+
     private static class ColdcardKeystore {
         public String deriv;
         public String name;

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

@@ -3,6 +3,7 @@ package com.sparrowwallet.sparrow.io;
 import com.google.gson.*;
 import com.sparrowwallet.drongo.BitcoinUnit;
 import com.sparrowwallet.sparrow.Mode;
+import com.sparrowwallet.sparrow.Theme;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -23,6 +24,8 @@ public class Config {
     private boolean groupByAddress = true;
     private boolean includeMempoolChange = true;
     private boolean notifyNewTransactions = true;
+    private boolean checkNewVersions = true;
+    private Theme theme;
     private List<File> recentWalletFiles;
     private Integer keyDerivationPeriod;
     private File hwi;
@@ -41,7 +44,12 @@ public class Config {
     }
 
     private static File getConfigFile() {
-        return new File(Storage.getSparrowDir(), CONFIG_FILENAME);
+        File sparrowDir = Storage.getSparrowDir();
+        if(!sparrowDir.exists()) {
+            sparrowDir.mkdirs();
+        }
+
+        return new File(sparrowDir, CONFIG_FILENAME);
     }
 
     private static Config load() {
@@ -135,6 +143,24 @@ public class Config {
         flush();
     }
 
+    public boolean isCheckNewVersions() {
+        return checkNewVersions;
+    }
+
+    public void setCheckNewVersions(boolean checkNewVersions) {
+        this.checkNewVersions = checkNewVersions;
+        flush();
+    }
+
+    public Theme getTheme() {
+        return theme;
+    }
+
+    public void setTheme(Theme theme) {
+        this.theme = theme;
+        flush();
+    }
+
     public List<File> getRecentWalletFiles() {
         return recentWalletFiles;
     }

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

@@ -9,6 +9,8 @@ import com.sparrowwallet.drongo.crypto.*;
 import com.sparrowwallet.drongo.policy.Policy;
 import com.sparrowwallet.drongo.policy.PolicyType;
 import com.sparrowwallet.drongo.protocol.ScriptType;
+import com.sparrowwallet.drongo.protocol.Sha256Hash;
+import com.sparrowwallet.drongo.protocol.Transaction;
 import com.sparrowwallet.drongo.wallet.*;
 
 import java.io.*;
@@ -81,6 +83,38 @@ public class Electrum implements KeystoreFileImport, WalletImport, WalletExport
                     }
                     ew.keystores.put(key, ek);
                 }
+
+                if(key.equals("labels")) {
+                    JsonObject jsonObject = (JsonObject)map.get(key);
+                    for(String labelKey : jsonObject.keySet()) {
+                        ew.labels.put(labelKey, jsonObject.get(labelKey).getAsString());
+                    }
+                }
+
+                if(key.equals("verified_tx3")) {
+                    JsonObject jsonObject = (JsonObject)map.get(key);
+                    for(String txKey : jsonObject.keySet()) {
+                        Sha256Hash txHash = Sha256Hash.wrap(txKey);
+                        JsonArray array = jsonObject.getAsJsonArray(txKey);
+                        if(array != null && array.size() > 3) {
+                            int height = array.get(0).getAsInt();
+                            Date date = new Date(array.get(1).getAsLong() * 1000);
+                            long fee = array.get(2).getAsLong();
+                            Sha256Hash blockHash = Sha256Hash.wrap(array.get(3).getAsString());
+
+                            JsonObject transactions = (JsonObject)map.get("transactions");
+                            if(transactions != null) {
+                                String txhex = transactions.get(txKey).getAsString();
+                                if(txhex != null) {
+                                    Transaction transaction = new Transaction(Utils.hexToBytes(txhex));
+
+                                    BlockTransaction blockTransaction = new BlockTransaction(txHash, height, date, fee, transaction, blockHash);
+                                    ew.transactions.put(txHash, blockTransaction);
+                                }
+                            }
+                        }
+                    }
+                }
             }
 
             Wallet wallet = new Wallet();
@@ -150,6 +184,20 @@ public class Electrum implements KeystoreFileImport, WalletImport, WalletExport
                 throw new ImportException("Unknown Electrum wallet type of " + ew.wallet_type);
             }
 
+            for(String key : ew.labels.keySet()) {
+                try {
+                    Sha256Hash txHash = Sha256Hash.wrap(key);
+                    BlockTransaction blockTransaction = ew.transactions.get(txHash);
+                    if(blockTransaction != null) {
+                        blockTransaction.setLabel(ew.labels.get(key));
+                    }
+                } catch(IllegalArgumentException e) {
+                    //not a tx, probably an address
+                }
+            }
+
+            wallet.updateTransactions(ew.transactions);
+
             if(!wallet.isValid()) {
                 throw new IllegalStateException("Electrum wallet is in an inconsistent state.");
             }
@@ -279,6 +327,8 @@ public class Electrum implements KeystoreFileImport, WalletImport, WalletExport
         public String wallet_type;
         public String seed_type;
         public Boolean use_encryption;
+        public Map<String, String> labels = new LinkedHashMap<>();
+        public Map<Sha256Hash, BlockTransaction> transactions = new HashMap<>();
     }
 
     public static class ElectrumKeystore {

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

@@ -3,6 +3,7 @@ package com.sparrowwallet.sparrow.io;
 import com.google.common.io.ByteStreams;
 import com.google.common.io.CharStreams;
 import com.google.gson.*;
+import com.sparrowwallet.drongo.Network;
 import com.sparrowwallet.drongo.protocol.ScriptType;
 import com.sparrowwallet.drongo.psbt.PSBT;
 import com.sparrowwallet.drongo.psbt.PSBTParseException;
@@ -23,7 +24,6 @@ import java.nio.file.attribute.PosixFilePermission;
 import java.nio.file.attribute.PosixFilePermissions;
 import java.util.*;
 import java.util.stream.Collectors;
-import java.util.zip.GZIPInputStream;
 import java.util.zip.ZipEntry;
 import java.util.zip.ZipInputStream;
 
@@ -36,7 +36,7 @@ public class Hwi {
     public List<Device> enumerate(String passphrase) throws ImportException {
         try {
             List<String> command;
-            if(passphrase != null) {
+            if(passphrase != null && !passphrase.isEmpty()) {
                 command = List.of(getHwiExecutable(Command.ENUMERATE).getAbsolutePath(), "--password", passphrase, Command.ENUMERATE.toString());
             } else {
                 command = List.of(getHwiExecutable(Command.ENUMERATE).getAbsolutePath(), Command.ENUMERATE.toString());
@@ -44,7 +44,7 @@ public class Hwi {
 
             String output = execute(command);
             Device[] devices = getGson().fromJson(output, Device[].class);
-            return Arrays.asList(devices);
+            return Arrays.stream(devices).filter(device -> device != null && device.getModel() != null).collect(Collectors.toList());
         } catch(IOException e) {
             throw new ImportException(e);
         }
@@ -63,6 +63,7 @@ public class Hwi {
     public boolean sendPin(Device device, String pin) throws ImportException {
         try {
             String output = execute(getDeviceCommand(device, Command.SEND_PIN, pin));
+            isPromptActive = false;
             return wasSuccessful(output);
         } catch(IOException e) {
             throw new ImportException(e);
@@ -72,12 +73,13 @@ public class Hwi {
     public String getXpub(Device device, String passphrase, String derivationPath) throws ImportException {
         try {
             String output;
-            if(passphrase != null && device.getModel().equals(WalletModel.TREZOR_1)) {
+            if(passphrase != null && !passphrase.isEmpty() && device.getModel().externalPassphraseEntry()) {
                 output = execute(getDeviceCommand(device, passphrase, Command.GET_XPUB, derivationPath));
             } else {
                 output = execute(getDeviceCommand(device, Command.GET_XPUB, derivationPath));
             }
 
+            isPromptActive = false;
             JsonObject result = JsonParser.parseString(output).getAsJsonObject();
             if(result.get("xpub") != null) {
                 return result.get("xpub").getAsString();
@@ -102,8 +104,9 @@ public class Hwi {
                 type = "--wpkh";
             }
 
+            isPromptActive = false;
             String output;
-            if(passphrase != null && device.getModel().equals(WalletModel.TREZOR_1)) {
+            if(passphrase != null && !passphrase.isEmpty() && device.getModel().externalPassphraseEntry()) {
                 output = execute(getDeviceCommand(device, passphrase, Command.DISPLAY_ADDRESS, "--path", derivationPath, type));
             } else {
                 output = execute(getDeviceCommand(device, Command.DISPLAY_ADDRESS, "--path", derivationPath, type));
@@ -113,23 +116,56 @@ public class Hwi {
             if(result.get("address") != null) {
                 return result.get("address").getAsString();
             } else {
-                throw new DisplayAddressException("Could not retrieve address");
+                JsonElement error = result.get("error");
+                if(error != null) {
+                    throw new DisplayAddressException(error.getAsString());
+                } else {
+                    throw new DisplayAddressException("Could not retrieve address");
+                }
             }
         } catch(IOException e) {
             throw new DisplayAddressException(e);
         }
     }
 
+    public String signMessage(Device device, String passphrase, String message, String derivationPath) throws SignMessageException {
+        try {
+            isPromptActive = false;
+            String output;
+            if(passphrase != null && !passphrase.isEmpty() && device.getModel().externalPassphraseEntry()) {
+                output = execute(getDeviceCommand(device, passphrase, Command.SIGN_MESSAGE, message, derivationPath));
+            } else {
+                output = execute(getDeviceCommand(device, Command.SIGN_MESSAGE, message, derivationPath));
+            }
+
+            JsonObject result = JsonParser.parseString(output).getAsJsonObject();
+            if(result.get("signature") != null) {
+                return result.get("signature").getAsString();
+            } else {
+                JsonElement error = result.get("error");
+                if(error != null) {
+                    throw new SignMessageException(error.getAsString());
+                } else {
+                    throw new SignMessageException("Could not sign message");
+                }
+            }
+        } catch(IOException e) {
+            throw new SignMessageException(e);
+        }
+    }
+
     public PSBT signPSBT(Device device, String passphrase, PSBT psbt) throws SignTransactionException {
         try {
             String psbtBase64 = psbt.toBase64String();
 
+            isPromptActive = true;
             String output;
-            if(passphrase != null && device.getModel().equals(WalletModel.TREZOR_1)) {
+            if(passphrase != null && !passphrase.isEmpty() && device.getModel().externalPassphraseEntry()) {
                 output = execute(getDeviceCommand(device, passphrase, Command.SIGN_TX, psbtBase64));
             } else {
                 output = execute(getDeviceCommand(device, Command.SIGN_TX, psbtBase64));
             }
+            isPromptActive = false;
 
             JsonObject result = JsonParser.parseString(output).getAsJsonObject();
             if(result.get("psbt") != null) {
@@ -155,7 +191,6 @@ public class Hwi {
     }
 
     private String execute(List<String> command) throws IOException {
-        isPromptActive = false;
         ProcessBuilder processBuilder = new ProcessBuilder(command);
         Process process = processBuilder.start();
         return CharStreams.toString(new InputStreamReader(process.getInputStream(), StandardCharsets.UTF_8));
@@ -165,7 +200,7 @@ public class Hwi {
         File hwiExecutable = Config.get().getHwi();
         if(hwiExecutable != null && hwiExecutable.exists()) {
             if(command.isTestFirst() && (!hwiExecutable.getAbsolutePath().contains(TEMP_FILE_PREFIX) || !testHwi(hwiExecutable))) {
-                if(Platform.getCurrent().getPlatformId().toLowerCase().equals("mac")) {
+                if(Platform.getCurrent() == Platform.OSX) {
                     deleteDirectory(hwiExecutable.getParentFile());
                 } else {
                     hwiExecutable.delete();
@@ -182,8 +217,8 @@ public class Hwi {
                 //To avoid doing these with every invocation, use a --onedir packaging and expand into a temp folder on OSX
                 //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.getPlatformId().toLowerCase().equals("mac")) {
-                    InputStream inputStream = Hwi.class.getResourceAsStream("/external/" + platform.getPlatformId().toLowerCase() + "/hwi-1.1.2-mac-amd64-signed.zip");
+                if(platform == Platform.OSX) {
+                    InputStream inputStream = Hwi.class.getResourceAsStream("/native/osx/x64/hwi-1.1.2-mac-amd64-signed.zip");
                     Path tempHwiDirPath = Files.createTempDirectory(TEMP_FILE_PREFIX, PosixFilePermissions.asFileAttribute(ownerExecutableWritable));
                     File tempHwiDir = tempHwiDirPath.toFile();
                     //tempHwiDir.deleteOnExit();
@@ -211,12 +246,20 @@ public class Hwi {
 
                     hwiExecutable = tempExec;
                 } else {
-                    InputStream inputStream = Hwi.class.getResourceAsStream("/external/" + platform.getPlatformId().toLowerCase() + "/hwi");
-                    Path tempExecPath = Files.createTempFile(TEMP_FILE_PREFIX, null, PosixFilePermissions.asFileAttribute(ownerExecutableWritable));
+                    InputStream inputStream;
+                    Path tempExecPath;
+                    if(platform == Platform.WINDOWS) {
+                        inputStream = Hwi.class.getResourceAsStream("/native/windows/x64/hwi.exe");
+                        tempExecPath = Files.createTempFile(TEMP_FILE_PREFIX, null);
+                    } else {
+                        inputStream = Hwi.class.getResourceAsStream("/native/linux/x64/hwi");
+                        tempExecPath = Files.createTempFile(TEMP_FILE_PREFIX, null, PosixFilePermissions.asFileAttribute(ownerExecutableWritable));
+                    }
+
                     File tempExec = tempExecPath.toFile();
-                    //tempExec.deleteOnExit();
+                    tempExec.deleteOnExit();
                     OutputStream tempExecStream = new BufferedOutputStream(new FileOutputStream(tempExec));
-                    ByteStreams.copy(new GZIPInputStream(inputStream), tempExecStream);
+                    ByteStreams.copy(inputStream, tempExecStream);
                     inputStream.close();
                     tempExecStream.flush();
                     tempExecStream.close();
@@ -280,17 +323,27 @@ public class Hwi {
     }
 
     private List<String> getDeviceCommand(Device device, Command command) throws IOException {
-        return List.of(getHwiExecutable(command).getAbsolutePath(), "--device-path", device.getPath(), "--device-type", device.getType(), command.toString());
+        List<String> elements = new ArrayList<>(List.of(getHwiExecutable(command).getAbsolutePath(), "--device-path", device.getPath(), "--device-type", device.getType(), command.toString()));
+        if(Network.get() != Network.MAINNET) {
+            elements.add(elements.size() - 1, "--testnet");
+        }
+        return elements;
     }
 
     private List<String> getDeviceCommand(Device device, Command command, String... commandData) throws IOException {
         List<String> elements = new ArrayList<>(List.of(getHwiExecutable(command).getAbsolutePath(), "--device-path", device.getPath(), "--device-type", device.getType(), command.toString()));
+        if(Network.get() != Network.MAINNET) {
+            elements.add(elements.size() - 1, "--testnet");
+        }
         elements.addAll(Arrays.stream(commandData).filter(Objects::nonNull).collect(Collectors.toList()));
         return elements;
     }
 
     private List<String> getDeviceCommand(Device device, String passphrase, Command command, String... commandData) throws IOException {
         List<String> elements = new ArrayList<>(List.of(getHwiExecutable(command).getAbsolutePath(), "--device-path", device.getPath(), "--device-type", device.getType(), "--password", passphrase, command.toString()));
+        if(Network.get() != Network.MAINNET) {
+            elements.add(elements.size() - 1, "--testnet");
+        }
         elements.addAll(Arrays.stream(commandData).filter(Objects::nonNull).collect(Collectors.toList()));
         return elements;
     }
@@ -397,6 +450,30 @@ public class Hwi {
         }
     }
 
+    public static class SignMessageService extends Service<String> {
+        private final Device device;
+        private final String passphrase;
+        private final String message;
+        private final String derivationPath;
+
+        public SignMessageService(Device device, String passphrase, String message, String derivationPath) {
+            this.device = device;
+            this.passphrase = passphrase;
+            this.message = message;
+            this.derivationPath = derivationPath;
+        }
+
+        @Override
+        protected Task<String> createTask() {
+            return new Task<>() {
+                protected String call() throws SignMessageException {
+                    Hwi hwi = new Hwi();
+                    return hwi.signMessage(device, passphrase, message, derivationPath);
+                }
+            };
+        }
+    }
+
     public static class GetXpubService extends Service<String> {
         private final Device device;
         private final String passphrase;
@@ -467,6 +544,7 @@ public class Hwi {
         PROMPT_PIN("promptpin", true),
         SEND_PIN("sendpin", false),
         DISPLAY_ADDRESS("displayaddress", true),
+        SIGN_MESSAGE("signmessage", true),
         GET_XPUB("getxpub", true),
         SIGN_TX("signtx", true);
 

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

@@ -0,0 +1,19 @@
+package com.sparrowwallet.sparrow.io;
+
+public class SignMessageException extends Exception {
+    public SignMessageException() {
+        super();
+    }
+
+    public SignMessageException(String message) {
+        super(message);
+    }
+
+    public SignMessageException(Throwable cause) {
+        super(cause);
+    }
+
+    public SignMessageException(String message, Throwable cause) {
+        super(message, cause);
+    }
+}

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

@@ -0,0 +1,93 @@
+package com.sparrowwallet.sparrow.io;
+
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import com.sparrowwallet.drongo.OutputDescriptor;
+import com.sparrowwallet.drongo.wallet.Wallet;
+import com.sparrowwallet.drongo.wallet.WalletModel;
+
+import java.io.File;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.OutputStream;
+import java.nio.charset.StandardCharsets;
+
+public class Specter implements WalletImport, WalletExport {
+    @Override
+    public void exportWallet(Wallet wallet, OutputStream outputStream) throws ExportException {
+        try {
+            SpecterWallet specterWallet = new SpecterWallet();
+            specterWallet.label = wallet.getName();
+            specterWallet.blockheight = wallet.getStoredBlockHeight();
+            specterWallet.descriptor = OutputDescriptor.getOutputDescriptor(wallet).toString(true);
+
+            Gson gson = new GsonBuilder().setPrettyPrinting().disableHtmlEscaping().create();
+            String json = gson.toJson(specterWallet);
+            outputStream.write(json.getBytes(StandardCharsets.UTF_8));
+            outputStream.flush();
+            outputStream.close();
+        } catch(Exception e) {
+            throw new ExportException(e);
+        }
+    }
+
+    @Override
+    public String getWalletExportDescription() {
+        return "Export a Specter wallet that can be read by Specter Desktop using Add new wallet > Import from wallet software";
+    }
+
+    @Override
+    public String getExportFileExtension() {
+        return "json";
+    }
+
+    @Override
+    public String getWalletImportDescription() {
+        return "Import a Specter wallet created by using the Wallets > Settings > Export to Wallet Software in Specter Desktop";
+    }
+
+    @Override
+    public Wallet importWallet(InputStream inputStream, String password) throws ImportException {
+        try {
+            Gson gson = new Gson();
+            SpecterWallet specterWallet = gson.fromJson(new InputStreamReader(inputStream), SpecterWallet.class);
+
+            if(specterWallet.descriptor != null) {
+                OutputDescriptor outputDescriptor = OutputDescriptor.getOutputDescriptor(specterWallet.descriptor);
+                Wallet wallet = outputDescriptor.toWallet();
+                wallet.setName(specterWallet.label);
+
+                if(!wallet.isValid()) {
+                    throw new ImportException("Specter wallet file did not contain a valid wallet");
+                }
+
+                return wallet;
+            }
+        } catch(Exception e) {
+            throw new ImportException(e);
+        }
+
+        throw new ImportException("File was not a valid Specter wallet");
+    }
+
+    @Override
+    public boolean isEncrypted(File file) {
+        return false;
+    }
+
+    @Override
+    public String getName() {
+        return "Specter";
+    }
+
+    @Override
+    public WalletModel getWalletModel() {
+        return WalletModel.SPECTER;
+    }
+
+    public static class SpecterWallet {
+        public String label;
+        public Integer blockheight;
+        public String descriptor;
+    }
+}

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

@@ -3,6 +3,7 @@ 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.*;
@@ -12,8 +13,10 @@ import com.sparrowwallet.drongo.wallet.Keystore;
 import com.sparrowwallet.drongo.wallet.MnemonicException;
 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;
+import org.controlsfx.tools.Platform;
 
 import java.io.*;
 import java.lang.reflect.Type;
@@ -33,6 +36,7 @@ public class Storage {
     private static final DateFormat BACKUP_DATE_FORMAT = new SimpleDateFormat("yyyyMMddHHmmss");
 
     public static final String SPARROW_DIR = ".sparrow";
+    public static final String WINDOWS_SPARROW_DIR = "Sparrow";
     public static final String WALLETS_DIR = "wallets";
     public static final String WALLETS_BACKUP_DIR = "backup";
     public static final String HEADER_MAGIC_1 = "SPRW1";
@@ -77,15 +81,16 @@ public class Storage {
         return gsonBuilder.setPrettyPrinting().disableHtmlEscaping().create();
     }
 
-    public Wallet loadWallet() throws IOException, MnemonicException {
+    public Wallet loadWallet() throws IOException {
         Reader reader = new FileReader(walletFile);
         Wallet wallet = gson.fromJson(reader, Wallet.class);
         reader.close();
 
+        encryptionPubKey = NO_PASSWORD_KEY;
         return wallet;
     }
 
-    public WalletAndKey loadWallet(CharSequence password) throws IOException, MnemonicException, StorageException {
+    public WalletAndKey loadWallet(CharSequence password) throws IOException, StorageException {
         InputStream fileStream = new FileInputStream(walletFile);
         ECKey encryptionKey = getEncryptionKey(password, fileStream);
 
@@ -217,12 +222,16 @@ public class Storage {
                 if(read != BINARY_HEADER_LENGTH) {
                     throw new StorageException("Not a Sparrow wallet - invalid header");
                 }
-                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");
+                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");
                 }
-                salt = Arrays.copyOfRange(decodedHeader, HEADER_MAGIC_1.length(), decodedHeader.length);
             } else {
                 SecureRandom secureRandom = new SecureRandom();
                 secureRandom.nextBytes(salt);
@@ -269,10 +278,30 @@ public class Storage {
     }
 
     static File getSparrowDir() {
+        if(Network.get() != Network.MAINNET) {
+            return new File(getSparrowHome(), Network.get().getName());
+        }
+
+        return getSparrowHome();
+    }
+
+    static File getSparrowHome() {
+        if(System.getProperty(MainApp.APP_HOME_PROPERTY) != null) {
+            return new File(System.getProperty(MainApp.APP_HOME_PROPERTY));
+        }
+
+        if(Platform.getCurrent() == Platform.WINDOWS) {
+            return new File(getHomeDir(), WINDOWS_SPARROW_DIR);
+        }
+
         return new File(getHomeDir(), SPARROW_DIR);
     }
 
     static File getHomeDir() {
+        if(Platform.getCurrent() == Platform.WINDOWS) {
+            return new File(System.getenv("APPDATA"));
+        }
+
         return new File(System.getProperty("user.home"));
     }
 
@@ -436,11 +465,9 @@ public class Storage {
         protected Task<WalletAndKey> createTask() {
             return new Task<>() {
                 protected WalletAndKey call() throws IOException, StorageException, MnemonicException {
-                    try {
-                        return storage.loadWallet(password);
-                    } finally {
-                        password.clear();
-                    }
+                    WalletAndKey walletAndKey = storage.loadWallet(password);
+                    password.clear();
+                    return walletAndKey;
                 }
             };
         }

src/main/java/com/sparrowwallet/sparrow/keystoreimport/HwAirgappedController.java

@@ -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());
+            importers = List.of(new ColdcardSinglesig(), new CoboVaultSinglesig());
         } else if(getMasterController().getWallet().getPolicyType().equals(PolicyType.MULTI)) {
-            importers = List.of(new ColdcardMultisig());
+            importers = List.of(new ColdcardMultisig(), new CoboVaultMultisig());
         }
 
         for(KeystoreImport importer : importers) {

src/main/java/com/sparrowwallet/sparrow/keystoreimport/KeystoreImportDialog.java

@@ -1,17 +1,17 @@
 package com.sparrowwallet.sparrow.keystoreimport;
 
 import com.google.common.eventbus.Subscribe;
+import com.sparrowwallet.drongo.KeyDerivation;
+import com.sparrowwallet.drongo.Network;
 import com.sparrowwallet.drongo.wallet.Keystore;
 import com.sparrowwallet.drongo.wallet.KeystoreSource;
 import com.sparrowwallet.drongo.wallet.Wallet;
+import com.sparrowwallet.drongo.wallet.WalletModel;
 import com.sparrowwallet.sparrow.AppController;
 import com.sparrowwallet.sparrow.EventManager;
 import com.sparrowwallet.sparrow.event.KeystoreImportEvent;
 import javafx.fxml.FXMLLoader;
-import javafx.scene.control.ButtonBar;
-import javafx.scene.control.ButtonType;
-import javafx.scene.control.Dialog;
-import javafx.scene.control.DialogPane;
+import javafx.scene.control.*;
 import org.controlsfx.tools.Borders;
 
 import java.io.IOException;
@@ -32,20 +32,22 @@ public class KeystoreImportDialog extends Dialog<Keystore> {
         });
 
         final DialogPane dialogPane = getDialogPane();
+        AppController.setStageIcon(dialogPane.getScene().getWindow());
 
         try {
             FXMLLoader ksiLoader = new FXMLLoader(AppController.class.getResource("keystoreimport/keystoreimport.fxml"));
-            dialogPane.setContent(Borders.wrap(ksiLoader.load()).lineBorder().outerPadding(0).innerPadding(0).buildAll());
+            dialogPane.setContent(Borders.wrap(ksiLoader.load()).emptyBorder().buildAll());
             keystoreImportController = ksiLoader.getController();
             keystoreImportController.initializeView(wallet);
             keystoreImportController.selectSource(initialSource);
 
+            final ButtonType watchOnlyButtonType = new javafx.scene.control.ButtonType(Network.get().getXpubHeader().getDisplayName() + " / Watch Only Wallet", ButtonBar.ButtonData.LEFT);
             final ButtonType cancelButtonType = new javafx.scene.control.ButtonType("Cancel", ButtonBar.ButtonData.CANCEL_CLOSE);
-            dialogPane.getButtonTypes().addAll(cancelButtonType);
+            dialogPane.getButtonTypes().addAll(watchOnlyButtonType, cancelButtonType);
             dialogPane.setPrefWidth(650);
             dialogPane.setPrefHeight(620);
 
-            setResultConverter(dialogButton -> dialogButton != cancelButtonType ? keystore : null);
+            setResultConverter(dialogButton -> dialogButton != cancelButtonType ? getWatchOnlyKeystore() : null);
         } catch(IOException e) {
             throw new RuntimeException(e);
         }
@@ -55,6 +57,14 @@ public class KeystoreImportDialog extends Dialog<Keystore> {
         return List.of(KeystoreSource.HW_USB, KeystoreSource.HW_AIRGAPPED, KeystoreSource.SW_SEED);
     }
 
+    private Keystore getWatchOnlyKeystore() {
+        this.keystore = new Keystore();
+        keystore.setSource(KeystoreSource.SW_WATCH);
+        keystore.setWalletModel(WalletModel.SPARROW);
+        keystore.setKeyDerivation(new KeyDerivation("",""));
+        return keystore;
+    }
+
     @Subscribe
     public void keystoreImported(KeystoreImportEvent event) {
         this.keystore = event.getKeystore();

src/main/java/com/sparrowwallet/sparrow/net/BatchedElectrumServerRpc.java

@@ -6,21 +6,26 @@ 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.protocol.Sha256Hash;
+import com.sparrowwallet.sparrow.EventManager;
+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.concurrent.atomic.AtomicLong;
 
 public class BatchedElectrumServerRpc implements ElectrumServerRpc {
     private static final Logger log = LoggerFactory.getLogger(BatchedElectrumServerRpc.class);
 
+    private final AtomicLong idCounter = new AtomicLong();
+
     @Override
     public void ping(Transport transport) {
         try {
             JsonRpcClient client = new JsonRpcClient(transport);
-            client.createRequest().method("server.ping").id(1).executeNullable();
+            client.createRequest().method("server.ping").id(idCounter.incrementAndGet()).executeNullable();
         } catch(JsonRpcException e) {
             throw new ElectrumServerRpcException("Error pinging server", e);
         }
@@ -30,7 +35,7 @@ public class BatchedElectrumServerRpc implements ElectrumServerRpc {
     public List<String> getServerVersion(Transport transport, String clientName, String[] supportedVersions) {
         try {
             JsonRpcClient client = new JsonRpcClient(transport);
-            return client.createRequest().returnAsList(String.class).method("server.version").id(1).param("client_name", clientName).param("protocol_version", supportedVersions).execute();
+            return client.createRequest().returnAsList(String.class).method("server.version").id(idCounter.incrementAndGet()).param("client_name", clientName).param("protocol_version", supportedVersions).execute();
         } catch(JsonRpcException e) {
             throw new ElectrumServerRpcException("Error getting server version", e);
         }
@@ -40,7 +45,7 @@ public class BatchedElectrumServerRpc implements ElectrumServerRpc {
     public String getServerBanner(Transport transport) {
         try {
             JsonRpcClient client = new JsonRpcClient(transport);
-            return client.createRequest().returnAs(String.class).method("server.banner").id(1).execute();
+            return client.createRequest().returnAs(String.class).method("server.banner").id(idCounter.incrementAndGet()).execute();
         } catch(JsonRpcException e) {
             throw new ElectrumServerRpcException("Error getting server banner", e);
         }
@@ -50,7 +55,7 @@ public class BatchedElectrumServerRpc implements ElectrumServerRpc {
     public BlockHeaderTip subscribeBlockHeaders(Transport transport) {
         try {
             JsonRpcClient client = new JsonRpcClient(transport);
-            return client.createRequest().returnAs(BlockHeaderTip.class).method("blockchain.headers.subscribe").id(1).execute();
+            return client.createRequest().returnAs(BlockHeaderTip.class).method("blockchain.headers.subscribe").id(idCounter.incrementAndGet()).execute();
         } catch(JsonRpcException e) {
             throw new ElectrumServerRpcException("Error subscribing to block headers", e);
         }
@@ -61,6 +66,7 @@ public class BatchedElectrumServerRpc implements ElectrumServerRpc {
     public Map<String, ScriptHashTx[]> getScriptHashHistory(Transport transport, 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(false, "Loading transactions"));
 
         for(String path : pathScriptHashes.keySet()) {
             batchRequest.add(path, "blockchain.scripthash.get_history", pathScriptHashes.get(path));
@@ -112,6 +118,7 @@ public class BatchedElectrumServerRpc implements ElectrumServerRpc {
     public Map<String, String> subscribeScriptHashes(Transport transport, 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(false, "Finding transactions"));
 
         for(String path : pathScriptHashes.keySet()) {
             batchRequest.add(path, "blockchain.scripthash.subscribe", pathScriptHashes.get(path));
@@ -130,6 +137,8 @@ public class BatchedElectrumServerRpc implements ElectrumServerRpc {
     public Map<Integer, String> getBlockHeaders(Transport transport, 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(false, "Retrieving blocks"));
+
         for(Integer height : blockHeights) {
             batchRequest.add(height, "blockchain.block.header", height);
         }
@@ -146,6 +155,8 @@ public class BatchedElectrumServerRpc implements ElectrumServerRpc {
     public Map<String, String> getTransactions(Transport transport, 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(false, "Retrieving transactions"));
+
         for(String txid : txids) {
             batchRequest.add(txid, "blockchain.transaction.get", txid);
         }
@@ -197,11 +208,21 @@ public class BatchedElectrumServerRpc implements ElectrumServerRpc {
         }
     }
 
+    @Override
+    public Double getMinimumRelayFee(Transport transport) {
+        try {
+            JsonRpcClient client = new JsonRpcClient(transport);
+            return client.createRequest().returnAs(Double.class).method("blockchain.relayfee").id(idCounter.incrementAndGet()).execute();
+        } catch(JsonRpcException e) {
+            throw new ElectrumServerRpcException("Error getting minimum relay fee", e);
+        }
+    }
+
     @Override
     public String broadcastTransaction(Transport transport, String txHex) {
         try {
             JsonRpcClient client = new JsonRpcClient(transport);
-            return client.createRequest().returnAs(String.class).method("blockchain.transaction.broadcast").id(1).param("raw_tx", txHex).execute();
+            return client.createRequest().returnAs(String.class).method("blockchain.transaction.broadcast").id(idCounter.incrementAndGet()).param("raw_tx", txHex).execute();
         } catch(JsonRpcException e) {
             throw new ElectrumServerRpcException(e.getErrorMessage().getMessage(), e);
         }

src/main/java/com/sparrowwallet/sparrow/net/ElectrumServer.java

@@ -1,6 +1,8 @@
 package com.sparrowwallet.sparrow.net;
 
 import com.github.arteam.simplejsonrpc.client.Transport;
+import com.google.common.collect.Iterables;
+import com.google.common.eventbus.Subscribe;
 import com.google.common.net.HostAndPort;
 import com.sparrowwallet.drongo.KeyPurpose;
 import com.sparrowwallet.drongo.Utils;
@@ -8,8 +10,11 @@ import com.sparrowwallet.drongo.protocol.*;
 import com.sparrowwallet.drongo.wallet.*;
 import com.sparrowwallet.sparrow.event.ConnectionEvent;
 import com.sparrowwallet.sparrow.event.FeeRatesUpdatedEvent;
+import com.sparrowwallet.sparrow.event.TorStatusEvent;
 import com.sparrowwallet.sparrow.io.Config;
 import com.sparrowwallet.sparrow.wallet.SendController;
+import javafx.beans.property.SimpleStringProperty;
+import javafx.beans.property.StringProperty;
 import javafx.concurrent.ScheduledService;
 import javafx.concurrent.Service;
 import javafx.concurrent.Task;
@@ -29,7 +34,7 @@ public class ElectrumServer {
 
     private static Transport transport;
 
-    private static final Map<String, String> subscribedScriptHashes = Collections.synchronizedMap(new HashMap<>());
+    private static final Map<String, Set<String>> subscribedScriptHashes = Collections.synchronizedMap(new HashMap<>());
 
     private static ElectrumServerRpc electrumServerRpc = new SimpleElectrumServerRpc();
 
@@ -130,43 +135,52 @@ public class ElectrumServer {
         return receiveTransactionMap;
     }
 
+    public Map<WalletNode, Set<BlockTransactionHash>> getHistory(Wallet wallet, Collection<WalletNode> nodes) throws ServerException {
+        Map<WalletNode, Set<BlockTransactionHash>> nodeTransactionMap = new TreeMap<>();
+        subscribeWalletNodes(wallet, nodes, nodeTransactionMap, 0);
+        getReferences(wallet, nodes, nodeTransactionMap);
+
+        return nodeTransactionMap;
+    }
+
     public void getHistory(Wallet wallet, KeyPurpose keyPurpose, Map<WalletNode, Set<BlockTransactionHash>> nodeTransactionMap) throws ServerException {
         WalletNode purposeNode = wallet.getNode(keyPurpose);
-        getHistory(wallet, purposeNode.getChildren(), nodeTransactionMap, 0);
+        subscribeWalletNodes(wallet, purposeNode.getChildren(), nodeTransactionMap, 0);
 
         //Because node children are added sequentially in WalletNode.fillToIndex, we can simply look at the number of children to determine the highest filled index
         int historySize = purposeNode.getChildren().size();
         //The gap limit size takes the highest used index in the retrieved history and adds the gap limit (plus one to be comparable to the number of children since index is zero based)
-        int gapLimitSize = getGapLimitSize(nodeTransactionMap);
+        int gapLimitSize = getGapLimitSize(wallet, nodeTransactionMap);
         while(historySize < gapLimitSize) {
             purposeNode.fillToIndex(gapLimitSize - 1);
-            getHistory(wallet, purposeNode.getChildren(), nodeTransactionMap, historySize);
+            subscribeWalletNodes(wallet, purposeNode.getChildren(), nodeTransactionMap, historySize);
             historySize = purposeNode.getChildren().size();
-            gapLimitSize = getGapLimitSize(nodeTransactionMap);
+            gapLimitSize = getGapLimitSize(wallet, nodeTransactionMap);
         }
+
+        //All WalletNode keys in nodeTransactionMap with non-null values need to have their history fetched
+        Collection<WalletNode> usedNodes = nodeTransactionMap.entrySet().stream().filter(entry -> entry.getValue() != null).map(Map.Entry::getKey).collect(Collectors.toList());
+        log.debug("Retrieving history for " + usedNodes.stream().map(WalletNode::getDerivationPath).collect(Collectors.joining(", ")));
+        getReferences(wallet, usedNodes, nodeTransactionMap);
+
+        //Set the remaining WalletNode keys to empty sets to indicate no history
+        nodeTransactionMap.entrySet().stream().filter(entry -> entry.getValue() == null).forEach(entry -> entry.setValue(Collections.emptySet()));
     }
 
-    private int getGapLimitSize(Map<WalletNode, Set<BlockTransactionHash>> nodeTransactionMap) {
+    private int getGapLimitSize(Wallet wallet, Map<WalletNode, Set<BlockTransactionHash>> nodeTransactionMap) {
         int highestIndex = nodeTransactionMap.entrySet().stream().filter(entry -> !entry.getValue().isEmpty()).map(entry -> entry.getKey().getIndex()).max(Comparator.comparing(Integer::valueOf)).orElse(-1);
-        return highestIndex + Wallet.DEFAULT_LOOKAHEAD + 1;
+        return highestIndex + wallet.getGapLimit() + 1;
     }
 
-    public void getHistory(Wallet wallet, Collection<WalletNode> nodes, Map<WalletNode, Set<BlockTransactionHash>> nodeTransactionMap, int startIndex) throws ServerException {
-        getReferences(wallet, "blockchain.scripthash.get_history", nodes, nodeTransactionMap, startIndex);
-        subscribeWalletNodes(wallet, nodes, startIndex);
-    }
-
-    public void getMempool(Wallet wallet, Collection<WalletNode> nodes, Map<WalletNode, Set<BlockTransactionHash>> nodeTransactionMap, int startIndex) throws ServerException {
-        getReferences(wallet, "blockchain.scripthash.get_mempool", nodes, nodeTransactionMap, startIndex);
-    }
-
-    public void getReferences(Wallet wallet, String method, Collection<WalletNode> nodes, Map<WalletNode, Set<BlockTransactionHash>> nodeTransactionMap, int startIndex) throws ServerException {
+    public void getReferences(Wallet wallet, Collection<WalletNode> nodes, Map<WalletNode, Set<BlockTransactionHash>> nodeTransactionMap) throws ServerException {
         try {
             Map<String, String> pathScriptHashes = new LinkedHashMap<>(nodes.size());
             for(WalletNode node : nodes) {
-                if(node.getIndex() >= startIndex) {
-                    pathScriptHashes.put(node.getDerivationPath(), getScriptHash(wallet, node));
-                }
+                pathScriptHashes.put(node.getDerivationPath(), getScriptHash(wallet, node));
+            }
+
+            if(pathScriptHashes.isEmpty()) {
+                return;
             }
 
             //Even if we have some successes, failure to retrieve all references will result in an incomplete wallet history. Don't proceed if that's the case.
@@ -207,14 +221,18 @@ public class ElectrumServer {
         }
     }
 
-    public void subscribeWalletNodes(Wallet wallet, Collection<WalletNode> nodes, int startIndex) throws ServerException {
+    public void subscribeWalletNodes(Wallet wallet, Collection<WalletNode> nodes, Map<WalletNode, Set<BlockTransactionHash>> nodeTransactionMap, int startIndex) throws ServerException {
         try {
             Set<String> scriptHashes = new HashSet<>();
             Map<String, String> pathScriptHashes = new LinkedHashMap<>();
             for(WalletNode node : nodes) {
                 if(node.getIndex() >= startIndex) {
                     String scriptHash = getScriptHash(wallet, node);
-                    if(!subscribedScriptHashes.containsKey(scriptHash) && scriptHashes.add(scriptHash)) {
+                    if(getSubscribedScriptHashStatus(scriptHash) != null) {
+                        //Already subscribed, but still need to fetch history from a used node
+                        nodeTransactionMap.put(node, new TreeSet<>());
+                    } else if(!subscribedScriptHashes.containsKey(scriptHash) && scriptHashes.add(scriptHash)) {
+                        //Unique script hash we are not yet subscribed to
                         pathScriptHashes.put(node.getDerivationPath(), scriptHash);
                     }
                 }
@@ -232,7 +250,15 @@ public class ElectrumServer {
                 Optional<WalletNode> optionalNode = nodes.stream().filter(n -> n.getDerivationPath().equals(path)).findFirst();
                 if(optionalNode.isPresent()) {
                     WalletNode node = optionalNode.get();
-                    subscribedScriptHashes.put(getScriptHash(wallet, node), status);
+                    String scriptHash = getScriptHash(wallet, node);
+
+                    //Check if there is history for this script hash
+                    if(status != null) {
+                        //Set the value for this node to be an empty set to mark it as requiring a get_history RPC call for this wallet
+                        nodeTransactionMap.put(node, new TreeSet<>());
+                    }
+
+                    updateSubscribedScriptHashStatus(scriptHash, status);
                 }
             }
         } catch (ElectrumServerRpcException e) {
@@ -370,7 +396,7 @@ public class ElectrumServer {
                 }
                 BlockTransactionHash reference = optionalReference.get();
 
-                Date blockDate;
+                Date blockDate = null;
                 if(reference.getHeight() > 0) {
                     BlockHeader blockHeader = blockHeaderMap.get(reference.getHeight());
                     if(blockHeader == null) {
@@ -379,8 +405,6 @@ public class ElectrumServer {
                         continue;
                     }
                     blockDate = blockHeader.getTimeAsDate();
-                } else {
-                    blockDate = new Date();
                 }
 
                 BlockTransaction blockchainTransaction = new BlockTransaction(reference.getHash(), reference.getHeight(), blockDate, reference.getFee(), transaction);
@@ -503,7 +527,8 @@ public class ElectrumServer {
 
             Map<Integer, Double> targetBlocksFeeRatesSats = new TreeMap<>();
             for(Integer target : targetBlocksFeeRatesBtcKb.keySet()) {
-                targetBlocksFeeRatesSats.put(target, targetBlocksFeeRatesBtcKb.get(target) * Transaction.SATOSHIS_PER_BITCOIN / 1024);
+                long minFeeRateSatsKb = (long)(targetBlocksFeeRatesBtcKb.get(target) * Transaction.SATOSHIS_PER_BITCOIN);
+                targetBlocksFeeRatesSats.put(target, minFeeRateSatsKb / 1000d);
             }
 
             return targetBlocksFeeRatesSats;
@@ -512,6 +537,16 @@ public class ElectrumServer {
         }
     }
 
+    public Double getMinimumRelayFee() throws ServerException {
+        Double minFeeRateBtcKb = electrumServerRpc.getMinimumRelayFee(getTransport());
+        if(minFeeRateBtcKb != null) {
+            long minFeeRateSatsKb = (long)(minFeeRateBtcKb * Transaction.SATOSHIS_PER_BITCOIN);
+            return minFeeRateSatsKb / 1000d;
+        }
+
+        return Transaction.DEFAULT_MIN_RELAY_FEE;
+    }
+
     public Sha256Hash broadcastTransaction(Transaction transaction) throws ServerException {
         byte[] rawtxBytes = transaction.bitcoinSerialize();
         String rawtxHex = Utils.bytesToHex(rawtxBytes);
@@ -541,10 +576,24 @@ public class ElectrumServer {
         return Utils.bytesToHex(reversed);
     }
 
-    public static Map<String, String> getSubscribedScriptHashes() {
+    public static Map<String, Set<String>> getSubscribedScriptHashes() {
         return subscribedScriptHashes;
     }
 
+    public static String getSubscribedScriptHashStatus(String scriptHash) {
+        Set<String> existingStatuses = subscribedScriptHashes.get(scriptHash);
+        if(existingStatuses != null) {
+            return Iterables.getLast(existingStatuses);
+        }
+
+        return null;
+    }
+
+    public static void updateSubscribedScriptHashStatus(String scriptHash, String status) {
+        Set<String> existingStatuses = subscribedScriptHashes.computeIfAbsent(scriptHash, k -> new LinkedHashSet<>());
+        existingStatuses.add(status);
+    }
+
     public static boolean supportsBatching(List<String> serverVersion) {
         return serverVersion.size() > 0 && serverVersion.get(0).toLowerCase().contains("electrumx");
     }
@@ -580,6 +629,7 @@ public class ElectrumServer {
         private boolean firstCall = true;
         private Thread reader;
         private long feeRatesRetrievedAt;
+        private StringProperty statusProperty = new SimpleStringProperty();
 
         public ConnectionService() {
             this(true);
@@ -602,6 +652,9 @@ public class ElectrumServer {
                         reader.setUncaughtExceptionHandler(ConnectionService.this);
                         reader.start();
 
+                        //Start with simple RPC for maximum compatibility
+                        electrumServerRpc = new SimpleElectrumServerRpc();
+
                         List<String> serverVersion = electrumServer.getServerVersion();
                         firstCall = false;
 
@@ -609,8 +662,6 @@ public class ElectrumServer {
                         if(supportsBatching(serverVersion)) {
                             log.debug("Upgrading to batched JSON-RPC");
                             electrumServerRpc = new BatchedElectrumServerRpc();
-                        } else {
-                            electrumServerRpc = new SimpleElectrumServerRpc();
                         }
 
                         BlockHeaderTip tip;
@@ -626,7 +677,12 @@ public class ElectrumServer {
                         Map<Integer, Double> blockTargetFeeRates = electrumServer.getFeeEstimates(SendController.TARGET_BLOCKS_RANGE);
                         feeRatesRetrievedAt = System.currentTimeMillis();
 
-                        return new ConnectionEvent(serverVersion, banner, tip.height, tip.getBlockHeader(), blockTargetFeeRates);
+                        Double minimumRelayFeeRate = electrumServer.getMinimumRelayFee();
+                        for(Integer blockTarget : blockTargetFeeRates.keySet()) {
+                            blockTargetFeeRates.computeIfPresent(blockTarget, (blocks, feeRate) -> feeRate < minimumRelayFeeRate ? minimumRelayFeeRate : feeRate);
+                        }
+
+                        return new ConnectionEvent(serverVersion, banner, tip.height, tip.getBlockHeader(), blockTargetFeeRates, minimumRelayFeeRate);
                     } else {
                         if(reader.isAlive()) {
                             electrumServer.ping();
@@ -677,6 +733,15 @@ public class ElectrumServer {
         public void uncaughtException(Thread t, Throwable e) {
             log.error("Uncaught error in ConnectionService", e);
         }
+
+        @Subscribe
+        public void torStatus(TorStatusEvent event) {
+            statusProperty.set(event.getStatus());
+        }
+
+        public StringProperty statusProperty() {
+            return statusProperty;
+        }
     }
 
     public static class ReadRunnable implements Runnable {
@@ -694,9 +759,16 @@ public class ElectrumServer {
 
     public static class TransactionHistoryService extends Service<Boolean> {
         private final Wallet wallet;
+        private final Set<WalletNode> nodes;
 
         public TransactionHistoryService(Wallet wallet) {
             this.wallet = wallet;
+            this.nodes = null;
+        }
+
+        public TransactionHistoryService(Wallet wallet, Set<WalletNode> nodes) {
+            this.wallet = wallet;
+            this.nodes = nodes;
         }
 
         @Override
@@ -704,7 +776,7 @@ public class ElectrumServer {
             return new Task<>() {
                 protected Boolean call() throws ServerException {
                     ElectrumServer electrumServer = new ElectrumServer();
-                    Map<WalletNode, Set<BlockTransactionHash>> nodeTransactionMap = electrumServer.getHistory(wallet);
+                    Map<WalletNode, Set<BlockTransactionHash>> nodeTransactionMap = (nodes == null ? electrumServer.getHistory(wallet) : electrumServer.getHistory(wallet, nodes));
                     electrumServer.getReferencedTransactions(wallet, nodeTransactionMap);
                     electrumServer.calculateNodeHistory(wallet, nodeTransactionMap);
                     return true;

src/main/java/com/sparrowwallet/sparrow/net/ElectrumServerRpc.java

@@ -29,5 +29,7 @@ public interface ElectrumServerRpc {
 
     Map<Integer, Double> getFeeEstimates(Transport transport, List<Integer> targetBlocks);
 
+    Double getMinimumRelayFee(Transport transport);
+
     String broadcastTransaction(Transport transport, String txHex);
 }

src/main/java/com/sparrowwallet/sparrow/net/Protocol.java

@@ -14,12 +14,16 @@ public enum Protocol {
     TCP {
         @Override
         public Transport getTransport(HostAndPort server) {
+            if(isOnionAddress(server)) {
+                return new TorTcpTransport(server);
+            }
+
             return new TcpTransport(server);
         }
 
         @Override
         public Transport getTransport(HostAndPort server, File serverCert) {
-            return new TcpTransport(server);
+            return getTransport(server);
         }
 
         @Override
@@ -35,11 +39,19 @@ public enum Protocol {
     SSL {
         @Override
         public Transport getTransport(HostAndPort server) throws KeyManagementException, NoSuchAlgorithmException {
+            if(isOnionAddress(server)) {
+                return new TorTcpOverTlsTransport(server);
+            }
+
             return new TcpOverTlsTransport(server);
         }
 
         @Override
         public Transport getTransport(HostAndPort server, File serverCert) throws IOException, CertificateException, NoSuchAlgorithmException, KeyStoreException, KeyManagementException {
+            if(isOnionAddress(server)) {
+                return new TorTcpOverTlsTransport(server, serverCert);
+            }
+
             return new TcpOverTlsTransport(server, serverCert);
         }
 
@@ -82,6 +94,10 @@ public enum Protocol {
         return toUrlString() + hostAndPort.toString();
     }
 
+    public boolean isOnionAddress(HostAndPort server) {
+        return server.getHost().toLowerCase().endsWith(".onion");
+    }
+
     public static Protocol getProtocol(String url) {
         if(url.startsWith("tcp://")) {
             return TCP;

src/main/java/com/sparrowwallet/sparrow/net/SimpleElectrumServerRpc.java

@@ -7,25 +7,25 @@ import com.sparrowwallet.drongo.Utils;
 import com.sparrowwallet.drongo.protocol.Sha256Hash;
 import com.sparrowwallet.drongo.protocol.Transaction;
 import com.sparrowwallet.sparrow.AppController;
+import com.sparrowwallet.sparrow.EventManager;
+import com.sparrowwallet.sparrow.event.WalletHistoryStatusEvent;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import java.util.LinkedHashMap;
-import java.util.List;
-import java.util.Map;
-import java.util.Set;
-
-import static com.sparrowwallet.drongo.protocol.Transaction.DUST_RELAY_TX_FEE;
+import java.util.*;
+import java.util.concurrent.atomic.AtomicLong;
 
 public class SimpleElectrumServerRpc implements ElectrumServerRpc {
     private static final Logger log = LoggerFactory.getLogger(SimpleElectrumServerRpc.class);
     private static final int MAX_TARGET_BLOCKS = 25;
 
+    private final AtomicLong idCounter = new AtomicLong();
+
     @Override
     public void ping(Transport transport) {
         try {
             JsonRpcClient client = new JsonRpcClient(transport);
-            client.createRequest().method("server.ping").id(1).executeNullable();
+            client.createRequest().method("server.ping").id(idCounter.incrementAndGet()).executeNullable();
         } catch(JsonRpcException | IllegalStateException | IllegalArgumentException e) {
             throw new ElectrumServerRpcException("Error pinging server", e);
         }
@@ -36,7 +36,7 @@ public class SimpleElectrumServerRpc implements ElectrumServerRpc {
         try {
             JsonRpcClient client = new JsonRpcClient(transport);
             //Using 1.4 as the version number as EPS tries to parse this number to a float
-            return client.createRequest().returnAsList(String.class).method("server.version").id(1).params(clientName, "1.4").execute();
+            return client.createRequest().returnAsList(String.class).method("server.version").id(idCounter.incrementAndGet()).params(clientName, "1.4").execute();
         } catch(JsonRpcException | IllegalStateException | IllegalArgumentException e) {
             throw new ElectrumServerRpcException("Error getting server version", e);
         }
@@ -46,7 +46,7 @@ public class SimpleElectrumServerRpc implements ElectrumServerRpc {
     public String getServerBanner(Transport transport) {
         try {
             JsonRpcClient client = new JsonRpcClient(transport);
-            return client.createRequest().returnAs(String.class).method("server.banner").id(1).execute();
+            return client.createRequest().returnAs(String.class).method("server.banner").id(idCounter.incrementAndGet()).execute();
         } catch(JsonRpcException | IllegalStateException | IllegalArgumentException e) {
             throw new ElectrumServerRpcException("Error getting server banner", e);
         }
@@ -56,7 +56,7 @@ public class SimpleElectrumServerRpc implements ElectrumServerRpc {
     public BlockHeaderTip subscribeBlockHeaders(Transport transport) {
         try {
             JsonRpcClient client = new JsonRpcClient(transport);
-            return client.createRequest().returnAs(BlockHeaderTip.class).method("blockchain.headers.subscribe").id(1).execute();
+            return client.createRequest().returnAs(BlockHeaderTip.class).method("blockchain.headers.subscribe").id(idCounter.incrementAndGet()).execute();
         } catch(JsonRpcException | IllegalStateException | IllegalArgumentException e) {
             throw new ElectrumServerRpcException("Error subscribing to block headers", e);
         }
@@ -68,8 +68,9 @@ public class SimpleElectrumServerRpc implements ElectrumServerRpc {
 
         Map<String, ScriptHashTx[]> result = new LinkedHashMap<>();
         for(String path : pathScriptHashes.keySet()) {
+            EventManager.get().post(new WalletHistoryStatusEvent(false, "Loading transactions for " + path));
             try {
-                ScriptHashTx[] scriptHashTxes = client.createRequest().returnAs(ScriptHashTx[].class).method("blockchain.scripthash.get_history").id(path).params(pathScriptHashes.get(path)).execute();
+                ScriptHashTx[] scriptHashTxes = client.createRequest().returnAs(ScriptHashTx[].class).method("blockchain.scripthash.get_history").id(path + "-" + idCounter.incrementAndGet()).params(pathScriptHashes.get(path)).execute();
                 result.put(path, scriptHashTxes);
             } catch(JsonRpcException | IllegalStateException | IllegalArgumentException e) {
                 if(failOnError) {
@@ -90,7 +91,7 @@ public class SimpleElectrumServerRpc implements ElectrumServerRpc {
         Map<String, ScriptHashTx[]> result = new LinkedHashMap<>();
         for(String path : pathScriptHashes.keySet()) {
             try {
-                ScriptHashTx[] scriptHashTxes = client.createRequest().returnAs(ScriptHashTx[].class).method("blockchain.scripthash.get_mempool").id(path).params(pathScriptHashes.get(path)).execute();
+                ScriptHashTx[] scriptHashTxes = client.createRequest().returnAs(ScriptHashTx[].class).method("blockchain.scripthash.get_mempool").id(path + "-" + idCounter.incrementAndGet()).params(pathScriptHashes.get(path)).execute();
                 result.put(path, scriptHashTxes);
             } catch(JsonRpcException | IllegalStateException | IllegalArgumentException e) {
                 if(failOnError) {
@@ -110,9 +111,10 @@ public class SimpleElectrumServerRpc implements ElectrumServerRpc {
 
         Map<String, String> result = new LinkedHashMap<>();
         for(String path : pathScriptHashes.keySet()) {
+            EventManager.get().post(new WalletHistoryStatusEvent(false, "Finding transactions for " + path));
             try {
-                client.createRequest().method("blockchain.scripthash.subscribe").id(path).params(pathScriptHashes.get(path)).executeNullable();
-                result.put(path, "");
+                String scriptHash = client.createRequest().returnAs(String.class).method("blockchain.scripthash.subscribe").id(path + "-" + idCounter.incrementAndGet()).params(pathScriptHashes.get(path)).executeNullable();
+                result.put(path, scriptHash);
             } catch(JsonRpcException | IllegalStateException | IllegalArgumentException 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 retrieve reference for path: " + path, e);
@@ -128,8 +130,9 @@ public class SimpleElectrumServerRpc implements ElectrumServerRpc {
 
         Map<Integer, String> result = new LinkedHashMap<>();
         for(Integer blockHeight : blockHeights) {
+            EventManager.get().post(new WalletHistoryStatusEvent(false, "Retrieving block at height " + blockHeight));
             try {
-                String blockHeader = client.createRequest().returnAs(String.class).method("blockchain.block.header").id(blockHeight).params(blockHeight).execute();
+                String blockHeader = client.createRequest().returnAs(String.class).method("blockchain.block.header").id(idCounter.incrementAndGet()).params(blockHeight).execute();
                 result.put(blockHeight, blockHeader);
             } catch(IllegalStateException | IllegalArgumentException e) {
                 log.warn("Failed to retrieve block header for block height: " + blockHeight + " (" + e.getMessage() + ")");
@@ -147,8 +150,9 @@ public class SimpleElectrumServerRpc implements ElectrumServerRpc {
 
         Map<String, String> result = new LinkedHashMap<>();
         for(String txid : txids) {
+            EventManager.get().post(new WalletHistoryStatusEvent(false, "Retrieving transaction [" + txid.substring(0, 6) + "]"));
             try {
-                String rawTxHex = client.createRequest().returnAs(String.class).method("blockchain.transaction.get").id(txid).params(txid).execute();
+                String rawTxHex = client.createRequest().returnAs(String.class).method("blockchain.transaction.get").id(idCounter.incrementAndGet()).params(txid).execute();
                 result.put(txid, rawTxHex);
             } catch(JsonRpcException | IllegalStateException | IllegalArgumentException e) {
                 result.put(txid, Sha256Hash.ZERO_HASH.toString());
@@ -165,33 +169,39 @@ public class SimpleElectrumServerRpc implements ElectrumServerRpc {
         Map<String, VerboseTransaction> result = new LinkedHashMap<>();
         for(String txid : txids) {
             try {
-                VerboseTransaction verboseTransaction = client.createRequest().returnAs(VerboseTransaction.class).method("blockchain.transaction.get").id(txid).params(txid, true).execute();
+                VerboseTransaction verboseTransaction = client.createRequest().returnAs(VerboseTransaction.class).method("blockchain.transaction.get").id(idCounter.incrementAndGet()).params(txid, true).execute();
                 result.put(txid, verboseTransaction);
-            } catch(IllegalStateException | IllegalArgumentException e) {
-                log.warn("Error retrieving transaction: " + txid + " (" + (e.getCause() != null ? e.getCause().getMessage() : e.getMessage()) + ")");
-                String rawTxHex = client.createRequest().returnAs(String.class).method("blockchain.transaction.get").id(txid).params(txid).execute();
-                Transaction tx = new Transaction(Utils.hexToBytes(rawTxHex));
-                String id = tx.getTxId().toString();
-                int height = 0;
+            } catch(Exception e) {
+                //electrs does not currently support the verbose parameter, so try to fetch an incomplete VerboseTransaction without it
+                //Note that without the script hash associated with the transaction, we can't get a block height as there is no way in the Electrum RPC protocol to do this
+                //We mark this VerboseTransaction as incomplete by assigning it a Sha256Hash.ZERO_HASH blockhash
+                log.debug("Error retrieving transaction: " + txid + " (" + (e.getCause() != null ? e.getCause().getMessage() : e.getMessage()) + ")");
 
-                if(scriptHash != null) {
-                    ScriptHashTx[] scriptHashTxes = client.createRequest().returnAs(ScriptHashTx[].class).method("blockchain.scripthash.get_history").id(id).params(scriptHash).execute();
-                    for(ScriptHashTx scriptHashTx : scriptHashTxes) {
-                        if(scriptHashTx.tx_hash.equals(id)) {
-                            height = scriptHashTx.height;
-                            break;
+                try {
+                    String rawTxHex = client.createRequest().returnAs(String.class).method("blockchain.transaction.get").id(idCounter.incrementAndGet()).params(txid).execute();
+                    Transaction tx = new Transaction(Utils.hexToBytes(rawTxHex));
+                    String id = tx.getTxId().toString();
+                    int height = 0;
+
+                    if(scriptHash != null) {
+                        ScriptHashTx[] scriptHashTxes = client.createRequest().returnAs(ScriptHashTx[].class).method("blockchain.scripthash.get_history").id(idCounter.incrementAndGet()).params(scriptHash).execute();
+                        for(ScriptHashTx scriptHashTx : scriptHashTxes) {
+                            if(scriptHashTx.tx_hash.equals(id)) {
+                                height = scriptHashTx.height;
+                                break;
+                            }
                         }
                     }
-                }
 
-                VerboseTransaction verboseTransaction = new VerboseTransaction();
-                verboseTransaction.txid = id;
-                verboseTransaction.hex = rawTxHex;
-                verboseTransaction.confirmations = (height <= 0 ? 0 : AppController.getCurrentBlockHeight() - height + 1);
-                verboseTransaction.blockhash = Sha256Hash.ZERO_HASH.toString();
-                result.put(txid, verboseTransaction);
-            } catch(JsonRpcException e) {
-                log.warn("Error retrieving transaction: " + txid + " (" + e.getErrorMessage() + ")");
+                    VerboseTransaction verboseTransaction = new VerboseTransaction();
+                    verboseTransaction.txid = id;
+                    verboseTransaction.hex = rawTxHex;
+                    verboseTransaction.confirmations = (height <= 0 ? 0 : AppController.getCurrentBlockHeight() - height + 1);
+                    verboseTransaction.blockhash = Sha256Hash.ZERO_HASH.toString();
+                    result.put(txid, verboseTransaction);
+                } catch(Exception ex) {
+                    throw new ElectrumServerRpcException("Error retrieving transaction: ", ex);
+                }
             }
         }
 
@@ -206,27 +216,37 @@ public class SimpleElectrumServerRpc implements ElectrumServerRpc {
         for(Integer targetBlock : targetBlocks) {
             if(targetBlock <= MAX_TARGET_BLOCKS) {
                 try {
-                    Double targetBlocksFeeRateBtcKb = client.createRequest().returnAs(Double.class).method("blockchain.estimatefee").id(targetBlock).params(targetBlock).execute();
+                    Double targetBlocksFeeRateBtcKb = client.createRequest().returnAs(Double.class).method("blockchain.estimatefee").id(idCounter.incrementAndGet()).params(targetBlock).execute();
                     result.put(targetBlock, targetBlocksFeeRateBtcKb);
                 } catch(IllegalStateException | IllegalArgumentException e) {
                     log.warn("Failed to retrieve fee rate for target blocks: " + targetBlock + " (" + e.getMessage() + ")");
-                    result.put(targetBlock, 1d);
+                    result.put(targetBlock, result.values().stream().mapToDouble(v -> v).min().orElse(0.0001d));
                 } catch(JsonRpcException e) {
                     throw new ElectrumServerRpcException("Failed to retrieve fee rate for target blocks: " + targetBlock, e);
                 }
             } else {
-                result.put(targetBlock, 1d);
+                result.put(targetBlock, result.values().stream().mapToDouble(v -> v).min().orElse(0.0001d));
             }
         }
 
         return result;
     }
 
+    @Override
+    public Double getMinimumRelayFee(Transport transport) {
+        try {
+            JsonRpcClient client = new JsonRpcClient(transport);
+            return client.createRequest().returnAs(Double.class).method("blockchain.relayfee").id(idCounter.incrementAndGet()).execute();
+        } catch(JsonRpcException e) {
+            throw new ElectrumServerRpcException("Error getting minimum relay fee", e);
+        }
+    }
+
     @Override
     public String broadcastTransaction(Transport transport, String txHex) {
         try {
             JsonRpcClient client = new JsonRpcClient(transport);
-            return client.createRequest().returnAs(String.class).method("blockchain.transaction.broadcast").id(1).params(txHex).execute();
+            return client.createRequest().returnAs(String.class).method("blockchain.transaction.broadcast").id(idCounter.incrementAndGet()).params(txHex).execute();
         } catch(IllegalStateException | IllegalArgumentException e) {
             throw new ElectrumServerRpcException(e.getMessage(), e);
         } catch(JsonRpcException e) {

src/main/java/com/sparrowwallet/sparrow/net/SubscriptionService.java

@@ -3,6 +3,7 @@ package com.sparrowwallet.sparrow.net;
 import com.github.arteam.simplejsonrpc.core.annotation.JsonRpcMethod;
 import com.github.arteam.simplejsonrpc.core.annotation.JsonRpcParam;
 import com.github.arteam.simplejsonrpc.core.annotation.JsonRpcService;
+import com.google.common.collect.Iterables;
 import com.sparrowwallet.sparrow.EventManager;
 import com.sparrowwallet.sparrow.event.NewBlockEvent;
 import com.sparrowwallet.sparrow.event.WalletNodeHistoryChangedEvent;
@@ -10,7 +11,7 @@ import javafx.application.Platform;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import java.util.Objects;
+import java.util.Set;
 
 @JsonRpcService
 public class SubscriptionService {
@@ -23,9 +24,17 @@ public class SubscriptionService {
 
     @JsonRpcMethod("blockchain.scripthash.subscribe")
     public void scriptHashStatusUpdated(@JsonRpcParam("scripthash") final String scriptHash, @JsonRpcParam("status") final String status) {
-        String oldStatus = ElectrumServer.getSubscribedScriptHashes().put(scriptHash, status);
-        if(Objects.equals(oldStatus, status)) {
+        Set<String> existingStatuses = ElectrumServer.getSubscribedScriptHashes().get(scriptHash);
+        if(existingStatuses == null) {
+            log.warn("Received script hash status update for unsubscribed script hash: " + scriptHash);
+            ElectrumServer.updateSubscribedScriptHashStatus(scriptHash, status);
+        } else if(existingStatuses.contains(status)) {
             log.warn("Received script hash status update, but status has not changed");
+            return;
+        } else {
+            String oldStatus = Iterables.getLast(existingStatuses);
+            log.debug("Status updated for script hash " + scriptHash + ", was " + oldStatus + " now " + status);
+            existingStatuses.add(status);
         }
 
         Platform.runLater(() -> EventManager.get().post(new WalletNodeHistoryChangedEvent(scriptHash)));

src/main/java/com/sparrowwallet/sparrow/net/TcpTransport.java

@@ -11,6 +11,8 @@ import org.slf4j.LoggerFactory;
 import javax.net.SocketFactory;
 import java.io.*;
 import java.net.Socket;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.locks.Condition;
 import java.util.concurrent.locks.ReentrantLock;
 
 public class TcpTransport implements Transport, Closeable {
@@ -25,6 +27,9 @@ public class TcpTransport implements Transport, Closeable {
 
     private String response;
 
+    private final ReentrantLock readLock = new ReentrantLock();
+    private final Condition readingCondition = readLock.newCondition();
+
     private final ReentrantLock clientRequestLock = new ReentrantLock();
     private boolean running = false;
     private boolean reading = true;
@@ -57,64 +62,83 @@ public class TcpTransport implements Transport, Closeable {
         out.flush();
     }
 
-    private synchronized String readResponse() throws IOException {
-        if(firstRead) {
-            notifyAll();
-            firstRead = false;
-        }
-
-        while(reading) {
-            try {
-                wait();
-            } catch(InterruptedException e) {
-                //Restore interrupt status and continue
-                Thread.currentThread().interrupt();
+    private String readResponse() throws IOException {
+        try {
+            if(!readLock.tryLock(60, TimeUnit.SECONDS)) {
+                throw new IOException("No response from server");
             }
+        } catch(InterruptedException e) {
+            throw new IOException("Read thread interrupted");
         }
 
-        if(lastException != null) {
-            throw new IOException("Error reading response: " + lastException.getMessage(), lastException);
+        try {
+            if(firstRead) {
+                readingCondition.signal();
+                firstRead = false;
+            }
+
+            while(reading) {
+                try {
+                    readingCondition.await();
+                } catch(InterruptedException e) {
+                    //Restore interrupt status and continue
+                    Thread.currentThread().interrupt();
+                }
+            }
+
+            if(lastException != null) {
+                throw new IOException("Error reading response: " + lastException.getMessage(), lastException);
+            }
+
+            reading = true;
+
+            readingCondition.signal();
+            return response;
+        } finally {
+            readLock.unlock();
         }
-
-        reading = true;
-
-        notifyAll();
-        return response;
     }
 
-    public synchronized void readInputLoop() throws ServerException {
-        try {
-            //Don't start reading until first RPC request is sent
-            wait();
-        } catch(InterruptedException e) {
-            Thread.currentThread().interrupt();
-        }
+    public void readInputLoop() throws ServerException {
+        readLock.lock();
 
-        while(running) {
+        try {
             try {
-                String received = readInputStream();
-                if(received.contains("method")) {
-                    //Handle subscription notification
-                    jsonRpcServer.handle(received, subscriptionService);
-                } else {
-                    //Handle client's response
-                    response = received;
-                    reading = false;
-                    notifyAll();
-                    wait();
-                }
+                //Don't start reading until first RPC request is sent
+                readingCondition.await();
             } catch(InterruptedException e) {
-                //Restore interrupt status and continue
                 Thread.currentThread().interrupt();
-            } catch(Exception e) {
-                if(running) {
-                    lastException = e;
-                    reading = false;
-                    notifyAll();
-                    //Allow this thread to terminate as we will need to reconnect with a new transport anyway
-                    running = false;
+            }
+
+            while(running) {
+                try {
+                    String received = readInputStream();
+                    if(received.contains("method")) {
+                        //Handle subscription notification
+                        jsonRpcServer.handle(received, subscriptionService);
+                    } else {
+                        //Handle client's response
+                        response = received;
+                        reading = false;
+                        readingCondition.signal();
+                        readingCondition.await();
+                    }
+                } catch(InterruptedException e) {
+                    //Restore interrupt status and continue
+                    Thread.currentThread().interrupt();
+                } catch(Exception e) {
+                    log.debug("Connection error while reading", e);
+                    if(running) {
+                        lastException = e;
+                        reading = false;
+                        readingCondition.signal();
+                        //Allow this thread to terminate as we will need to reconnect with a new transport anyway
+                        running = false;
+                    }
                 }
             }
+        } finally {
+            readLock.unlock();
         }
     }
 

src/main/java/com/sparrowwallet/sparrow/net/TorTcpOverTlsTransport.java

@@ -0,0 +1,49 @@
+package com.sparrowwallet.sparrow.net;
+
+import com.google.common.net.HostAndPort;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import javax.net.ssl.SSLSocket;
+import java.io.File;
+import java.io.IOException;
+import java.lang.reflect.Field;
+import java.net.Socket;
+import java.security.KeyManagementException;
+import java.security.KeyStoreException;
+import java.security.NoSuchAlgorithmException;
+import java.security.cert.CertificateException;
+
+public class TorTcpOverTlsTransport extends TcpOverTlsTransport {
+    private static final Logger log = LoggerFactory.getLogger(TorTcpOverTlsTransport.class);
+
+    public TorTcpOverTlsTransport(HostAndPort server) throws NoSuchAlgorithmException, KeyManagementException {
+        super(server);
+    }
+
+    public TorTcpOverTlsTransport(HostAndPort server, File crtFile) throws IOException, CertificateException, NoSuchAlgorithmException, KeyStoreException, KeyManagementException {
+        super(server, crtFile);
+    }
+
+    @Override
+    protected Socket createSocket() throws IOException {
+        TorTcpTransport torTcpTransport = new TorTcpTransport(server);
+        Socket socket = torTcpTransport.createSocket();
+
+        try {
+            Field socketField = socket.getClass().getDeclaredField("socket");
+            socketField.setAccessible(true);
+            Socket innerSocket = (Socket)socketField.get(socket);
+            Field connectedField = innerSocket.getClass().getSuperclass().getDeclaredField("connected");
+            connectedField.setAccessible(true);
+            connectedField.set(innerSocket, true);
+        } catch(Exception e) {
+            log.error("Could not set socket connected status", e);
+        }
+
+        SSLSocket sslSocket = (SSLSocket) sslSocketFactory.createSocket(socket, server.getHost(), server.getPortOrDefault(DEFAULT_PORT), true);
+        sslSocket.startHandshake();
+
+        return sslSocket;
+    }
+}

src/main/java/com/sparrowwallet/sparrow/net/TorTcpTransport.java

@@ -0,0 +1,55 @@
+package com.sparrowwallet.sparrow.net;
+
+import com.google.common.net.HostAndPort;
+import com.sparrowwallet.sparrow.EventManager;
+import com.sparrowwallet.sparrow.event.StatusEvent;
+import com.sparrowwallet.sparrow.event.TorStatusEvent;
+import javafx.application.Platform;
+import org.berndpruenster.netlayer.tor.*;
+
+import java.io.*;
+import java.net.Socket;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.Collections;
+import java.util.LinkedHashMap;
+
+public class TorTcpTransport extends TcpTransport {
+    public static final String TOR_DIR_PREFIX = "tor";
+
+    public TorTcpTransport(HostAndPort server) {
+        super(server);
+    }
+
+    @Override
+    protected Socket createSocket() throws IOException {
+        if(Tor.getDefault() == null) {
+            Platform.runLater(() -> {
+                String status = "Starting Tor...";
+                EventManager.get().post(new TorStatusEvent(status));
+            });
+
+            Path path = Files.createTempDirectory(TOR_DIR_PREFIX);
+            File torInstallDir = path.toFile();
+            torInstallDir.deleteOnExit();
+            try {
+                LinkedHashMap<String, String> torrcOptionsMap = new LinkedHashMap<>();
+                torrcOptionsMap.put("DisableNetwork", "0");
+                Torrc override = new Torrc(torrcOptionsMap);
+
+                NativeTor nativeTor = new NativeTor(torInstallDir, Collections.emptyList(), override);
+                Tor.setDefault(nativeTor);
+            } catch(TorCtlException e) {
+                e.printStackTrace();
+                throw new IOException(e);
+            }
+        }
+
+        Platform.runLater(() -> {
+            String status = "Tor running, connecting to " + server.toString() + "...";
+            EventManager.get().post(new TorStatusEvent(status));
+        });
+
+        return new TorSocket(server.getHost(), server.getPort(), "sparrow");
+    }
+}

src/main/java/com/sparrowwallet/sparrow/net/VersionCheckService.java

@@ -0,0 +1,151 @@
+package com.sparrowwallet.sparrow.net;
+
+import com.google.gson.Gson;
+import com.sparrowwallet.drongo.address.Address;
+import com.sparrowwallet.drongo.address.InvalidAddressException;
+import com.sparrowwallet.drongo.crypto.ECKey;
+import com.sparrowwallet.drongo.protocol.ScriptType;
+import com.sparrowwallet.sparrow.MainApp;
+import com.sparrowwallet.sparrow.event.VersionUpdatedEvent;
+import javafx.concurrent.ScheduledService;
+import javafx.concurrent.Task;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import javax.net.ssl.HttpsURLConnection;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.net.URL;
+import java.security.SignatureException;
+import java.util.Map;
+
+public class VersionCheckService extends ScheduledService<VersionUpdatedEvent> {
+    private static final Logger log = LoggerFactory.getLogger(VersionCheckService.class);
+    private static final String VERSION_CHECK_URL = "https://www.sparrowwallet.com/version";
+
+    @Override
+    protected Task<VersionUpdatedEvent> createTask() {
+        return new Task<>() {
+            protected VersionUpdatedEvent call() {
+                try {
+                    VersionCheck versionCheck = getVersionCheck();
+                    if(isNewer(versionCheck) && verifySignature(versionCheck)) {
+                        return new VersionUpdatedEvent(versionCheck.version);
+                    }
+                } catch(IOException e) {
+                    log.error("Error retrieving version check file", e);
+                }
+
+                return null;
+            }
+        };
+    }
+
+    private VersionCheck getVersionCheck() throws IOException {
+        URL url = new URL(VERSION_CHECK_URL);
+        HttpsURLConnection conn = (HttpsURLConnection)url.openConnection();
+
+        try(InputStreamReader reader = new InputStreamReader(conn.getInputStream())) {
+            Gson gson = new Gson();
+            return gson.fromJson(reader, VersionCheck.class);
+        }
+    }
+
+    private boolean verifySignature(VersionCheck versionCheck) {
+        try {
+            for(String addressString : versionCheck.signatures.keySet()) {
+                if(!addressString.equals("1LiJx1HQ49L2LzhBwbgwXdHiGodvPg5YaV")) {
+                    log.warn("Invalid address for version check " + addressString);
+                    continue;
+                }
+
+                String signature = versionCheck.signatures.get(addressString);
+                ECKey signedMessageKey = ECKey.signedMessageToKey(versionCheck.version, signature, false);
+                Address providedAddress = Address.fromString(addressString);
+                Address signedMessageAddress = ScriptType.P2PKH.getAddress(signedMessageKey);
+
+                if(providedAddress.equals(signedMessageAddress)) {
+                    return true;
+                } else {
+                    log.warn("Invalid signature for version check " + signature + " from address " + addressString);
+                }
+            }
+        } catch(SignatureException e) {
+            log.error("Error in version check signature", e);
+        } catch(InvalidAddressException e) {
+            log.error("Error in version check address", e);
+        }
+
+        return false;
+    }
+
+    private boolean isNewer(VersionCheck versionCheck) {
+        try {
+            Version versionCheckVersion = new Version(versionCheck.version);
+            Version currentVersion = new Version(MainApp.APP_VERSION);
+            return versionCheckVersion.compareTo(currentVersion) > 0;
+        } catch(IllegalArgumentException e) {
+            log.error("Invalid versions to compare: " + versionCheck.version + " to " + MainApp.APP_VERSION, e);
+        }
+
+        return false;
+    }
+
+    private static class VersionCheck {
+        public String version;
+        public Map<String, String> signatures;
+    }
+
+    public static class Version implements Comparable<Version> {
+        private final String version;
+
+        public final String get() {
+            return this.version;
+        }
+
+        public Version(String version) {
+            if(version == null) {
+                throw new IllegalArgumentException("Version can not be null");
+            }
+            if(!version.matches("[0-9]+(\\.[0-9]+)*")) {
+                throw new IllegalArgumentException("Invalid version format");
+            }
+            this.version = version;
+        }
+
+        @Override
+        public int compareTo(Version that) {
+            if(that == null) {
+                return 1;
+            }
+            String[] thisParts = this.get().split("\\.");
+            String[] thatParts = that.get().split("\\.");
+            int length = Math.max(thisParts.length, thatParts.length);
+            for(int i = 0; i < length; i++) {
+                int thisPart = i < thisParts.length ? Integer.parseInt(thisParts[i]) : 0;
+                int thatPart = i < thatParts.length ? Integer.parseInt(thatParts[i]) : 0;
+                if(thisPart < thatPart) {
+                    return -1;
+                }
+                if(thisPart > thatPart) {
+                    return 1;
+                }
+            }
+            return 0;
+        }
+
+        @Override
+        public boolean equals(Object that) {
+            if(this == that) {
+                return true;
+            }
+            if(that == null) {
+                return false;
+            }
+            if(this.getClass() != that.getClass()) {
+                return false;
+            }
+            return this.compareTo((Version)that) == 0;
+        }
+    }
+}

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

@@ -5,6 +5,7 @@ import com.sparrowwallet.sparrow.EventManager;
 import com.sparrowwallet.sparrow.control.UnlabeledToggleSwitch;
 import com.sparrowwallet.sparrow.event.BitcoinUnitChangedEvent;
 import com.sparrowwallet.sparrow.event.FiatCurrencySelectedEvent;
+import com.sparrowwallet.sparrow.event.VersionCheckStatusEvent;
 import com.sparrowwallet.sparrow.io.Config;
 import com.sparrowwallet.sparrow.io.ExchangeSource;
 import javafx.beans.value.ChangeListener;
@@ -38,6 +39,9 @@ public class GeneralPreferencesController extends PreferencesDetailController {
     @FXML
     private UnlabeledToggleSwitch notifyNewTransactions;
 
+    @FXML
+    private UnlabeledToggleSwitch checkNewVersions;
+
     private final ChangeListener<Currency> fiatCurrencyListener = new ChangeListener<Currency>() {
         @Override
         public void changed(ObservableValue<? extends Currency> observable, Currency oldValue, Currency newValue) {
@@ -86,6 +90,12 @@ public class GeneralPreferencesController extends PreferencesDetailController {
         notifyNewTransactions.selectedProperty().addListener((observableValue, oldValue, newValue) -> {
             config.setNotifyNewTransactions(newValue);
         });
+
+        checkNewVersions.setSelected(config.isCheckNewVersions());
+        checkNewVersions.selectedProperty().addListener((observableValue, oldValue, newValue) -> {
+            config.setCheckNewVersions(newValue);
+            EventManager.get().post(new VersionCheckStatusEvent(newValue));
+        });
     }
 
     private void updateCurrencies(ExchangeSource exchangeSource) {

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

@@ -27,10 +27,11 @@ public class PreferencesDialog extends Dialog<Boolean> {
 
     public PreferencesDialog(PreferenceGroup initialGroup, boolean initialSetup) {
         final DialogPane dialogPane = getDialogPane();
+        AppController.setStageIcon(dialogPane.getScene().getWindow());
 
         try {
             FXMLLoader preferencesLoader = new FXMLLoader(AppController.class.getResource("preferences/preferences.fxml"));
-            dialogPane.setContent(Borders.wrap(preferencesLoader.load()).lineBorder().outerPadding(0).innerPadding(0).buildAll());
+            dialogPane.setContent(Borders.wrap(preferencesLoader.load()).emptyBorder().buildAll());
             PreferencesController preferencesController = preferencesLoader.getController();
             preferencesController.initializeView(Config.get());
             if(initialGroup != null) {

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

@@ -28,6 +28,8 @@ import org.controlsfx.validation.ValidationSupport;
 import org.controlsfx.validation.Validator;
 import org.controlsfx.validation.decoration.StyleClassValidationDecoration;
 import org.jetbrains.annotations.NotNull;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 import javax.net.ssl.SSLHandshakeException;
 import java.io.File;
@@ -36,6 +38,8 @@ import java.security.cert.CertificateFactory;
 import java.util.List;
 
 public class ServerPreferencesController extends PreferencesDetailController {
+    private static final Logger log = LoggerFactory.getLogger(ServerPreferencesController.class);
+
     @FXML
     private TextField host;
 
@@ -140,13 +144,20 @@ public class ServerPreferencesController extends PreferencesDetailController {
             testConnection.setGraphic(getGlyph(FontAwesome5.Glyph.ELLIPSIS_H, null));
 
             ElectrumServer.ConnectionService connectionService = new ElectrumServer.ConnectionService(false);
-            connectionService.setPeriod(Duration.minutes(1));
+            connectionService.setPeriod(Duration.ZERO);
+            EventManager.get().register(connectionService);
+            connectionService.statusProperty().addListener((observable, oldValue, newValue) -> {
+                testResults.setText(testResults.getText() + "\n" + newValue);
+            });
+
             connectionService.setOnSucceeded(successEvent -> {
+                EventManager.get().unregister(connectionService);
                 ConnectionEvent connectionEvent = (ConnectionEvent)connectionService.getValue();
                 showConnectionSuccess(connectionEvent.getServerVersion(), connectionEvent.getServerBanner());
                 connectionService.cancel();
             });
             connectionService.setOnFailed(workerStateEvent -> {
+                EventManager.get().unregister(connectionService);
                 showConnectionFailure(workerStateEvent);
                 connectionService.cancel();
             });
@@ -216,7 +227,7 @@ public class ServerPreferencesController extends PreferencesDetailController {
     }
 
     private void showConnectionSuccess(List<String> serverVersion, String serverBanner) {
-        testConnection.setGraphic(getGlyph(FontAwesome5.Glyph.CHECK_CIRCLE, Color.rgb(80, 161, 79)));
+        testConnection.setGraphic(getGlyph(FontAwesome5.Glyph.CHECK_CIRCLE, "success"));
         if(serverVersion != null) {
             testResults.setText("Connected to " + serverVersion.get(0) + " on protocol version " + serverVersion.get(1));
             if(ElectrumServer.supportsBatching(serverVersion)) {
@@ -230,13 +241,14 @@ public class ServerPreferencesController extends PreferencesDetailController {
 
     private void showConnectionFailure(WorkerStateEvent failEvent) {
         Throwable e = failEvent.getSource().getException();
+        log.error("Connection error", e);
         String reason = e.getCause() != null ? e.getCause().getMessage() : e.getMessage();
         if(e.getCause() != null && e.getCause() instanceof SSLHandshakeException) {
             reason = "SSL Handshake Error\n" + reason;
         }
 
         testResults.setText("Could not connect:\n\n" + reason);
-        testConnection.setGraphic(getGlyph(FontAwesome5.Glyph.EXCLAMATION_CIRCLE, Color.rgb(202, 18, 67)));
+        testConnection.setGraphic(getGlyph(FontAwesome5.Glyph.EXCLAMATION_CIRCLE, "failure"));
     }
 
     private void setupValidation() {
@@ -328,11 +340,11 @@ public class ServerPreferencesController extends PreferencesDetailController {
         }
     }
 
-    private Glyph getGlyph(FontAwesome5.Glyph glyphName, Color color) {
+    private Glyph getGlyph(FontAwesome5.Glyph glyphName, String styleClass) {
         Glyph glyph = new Glyph(FontAwesome5.FONT_NAME, glyphName);
-        glyph.setFontSize(13);
-        if(color != null) {
-            glyph.setColor(color);
+        glyph.setFontSize(12);
+        if(styleClass != null) {
+            glyph.getStyleClass().add(styleClass);
         }
 
         return glyph;

src/main/java/com/sparrowwallet/sparrow/transaction/HeadersController.java

@@ -49,7 +49,7 @@ import java.time.*;
 import java.util.*;
 import java.util.stream.Collectors;
 
-public class HeadersController extends TransactionFormController implements Initializable {
+public class HeadersController extends TransactionFormController implements Initializable, DynamicUpdate {
     private static final Logger log = LoggerFactory.getLogger(HeadersController.class);
     public static final String LOCKTIME_DATE_FORMAT = "yyyy-MM-dd HH:mm:ss";
     public static final String BLOCK_TIMESTAMP_DATE_FORMAT = "yyyy-MM-dd HH:mm:ss ZZZ";
@@ -121,7 +121,7 @@ public class HeadersController extends TransactionFormController implements Init
     private CopyableLabel feeRate;
 
     @FXML
-    private Form blockchainForm;
+    private DynamicForm blockchainForm;
 
     @FXML
     private Label blockStatus;
@@ -405,11 +405,13 @@ public class HeadersController extends TransactionFormController implements Init
                 updateSignedKeystores(signingWallet);
 
                 int threshold = signingWallet.getDefaultPolicy().getNumSignaturesRequired();
-                signaturesProgressBar.initialize(headersForm.getSignedKeystores(), threshold);
+                signaturesProgressBar.initialize(headersForm.getSignatureKeystoreMap(), threshold);
             });
 
             EventManager.get().post(new RequestOpenWalletsEvent());
         }
+
+        blockchainForm.setDynamicUpdate(this);
     }
 
     private void updateType() {
@@ -493,6 +495,8 @@ public class HeadersController extends TransactionFormController implements Init
                     indicator = (ConfirmationProgressIndicator)blockStatus.getGraphic();
                     indicator.setConfirmations(confirmations);
                 }
+            } else {
+                blockStatus.setGraphic(null);
             }
         }
 
@@ -689,9 +693,7 @@ public class HeadersController extends TransactionFormController implements Init
             return;
         }
 
-        signingDevices.addAll(AppController.getDevices().stream().filter(device -> device.getNeedsPinSent() || device.getNeedsPassphraseSent()).collect(Collectors.toList()));
-
-        DeviceSignDialog dlg = new DeviceSignDialog(signingDevices.isEmpty() ? null : signingDevices, headersForm.getPsbt());
+        DeviceSignDialog dlg = new DeviceSignDialog(fingerprints, headersForm.getPsbt());
         dlg.initModality(Modality.NONE);
         Stage stage = (Stage)dlg.getDialogPane().getScene().getWindow();
         stage.setAlwaysOnTop(true);
@@ -705,12 +707,11 @@ public class HeadersController extends TransactionFormController implements Init
     }
 
     private void updateSignedKeystores(Wallet signingWallet) {
-        Map<PSBTInput, List<Keystore>> signedKeystoresMap = signingWallet.getSignedKeystores(headersForm.getPsbt());
-        Optional<List<Keystore>> optSignedKeystores = signedKeystoresMap.values().stream().filter(list -> !list.isEmpty()).min(Comparator.comparingInt(List::size));
+        Map<PSBTInput, Map<TransactionSignature, Keystore>> signedKeystoresMap = signingWallet.getSignedKeystores(headersForm.getPsbt());
+        Optional<Map<TransactionSignature, Keystore>> optSignedKeystores = signedKeystoresMap.values().stream().filter(map -> !map.isEmpty()).min(Comparator.comparingInt(Map::size));
         optSignedKeystores.ifPresent(signedKeystores -> {
-            List<Keystore> newSignedKeystores = new ArrayList<>(signedKeystores);
-            newSignedKeystores.removeAll(headersForm.getSignedKeystores());
-            headersForm.getSignedKeystores().addAll(newSignedKeystores);
+            headersForm.getSignatureKeystoreMap().keySet().retainAll(signedKeystores.keySet());
+            headersForm.getSignatureKeystoreMap().putAll(signedKeystores);
         });
     }
 
@@ -749,7 +750,7 @@ public class HeadersController extends TransactionFormController implements Init
         broadcastTransactionService.setOnFailed(workerStateEvent -> {
             broadcastProgressBar.setProgress(0);
             log.error("Error broadcasting transaction", workerStateEvent.getSource().getException());
-            AppController.showErrorDialog("Error broadcasting transaction", workerStateEvent.getSource().getException().getMessage());
+            AppController.showErrorDialog("Error broadcasting transaction", "The server returned an error when broadcasting the transaction. The server response is contained in sparrow.log");
             broadcastButton.setDisable(false);
         });
 
@@ -782,6 +783,19 @@ public class HeadersController extends TransactionFormController implements Init
         }
     }
 
+    @Override
+    public void update() {
+        BlockTransaction blockTransaction = headersForm.getBlockTransaction();
+        Sha256Hash txId = headersForm.getTransaction().getTxId();
+        if(headersForm.getSigningWallet() != null && headersForm.getSigningWallet().getTransactions().containsKey(txId)) {
+            blockTransaction = headersForm.getSigningWallet().getTransactions().get(txId);
+        }
+
+        if(blockTransaction != null && AppController.getCurrentBlockHeight() != null) {
+            updateBlockchainForm(blockTransaction, AppController.getCurrentBlockHeight());
+        }
+    }
+
     @Subscribe
     public void transactionChanged(TransactionChangedEvent event) {
         if(headersForm.getTransaction().equals(event.getTransaction())) {
@@ -833,6 +847,7 @@ public class HeadersController extends TransactionFormController implements Init
 
                     signaturesForm.setVisible(true);
                     headersForm.setSigningWallet(availableWallets.get(0));
+                    signButton.setDisable(false);
 
                     if(headersForm.getPsbt().isSigned()) {
                         finalizePSBT();
@@ -849,6 +864,7 @@ public class HeadersController extends TransactionFormController implements Init
                     noWalletsWarning.setVisible(false);
                     signingWallet.setVisible(true);
                     finalizeTransaction.setDisable(false);
+                    signButton.setDisable(false);
                 }
             } else {
                 if(headersForm.getPsbt().isSigned()) {
@@ -865,6 +881,7 @@ public class HeadersController extends TransactionFormController implements Init
                     noWalletsWarning.setVisible(true);
                     signingWallet.setVisible(false);
                     finalizeTransaction.setDisable(true);
+                    signButton.setDisable(true);
                 }
             }
         }
@@ -922,6 +939,7 @@ public class HeadersController extends TransactionFormController implements Init
     @Subscribe
     public void keystoreSigned(KeystoreSignedEvent event) {
         if(headersForm.getSignedKeystores().contains(event.getKeystore()) && headersForm.getPsbt() != null) {
+            //Attempt to finalize PSBT - will do nothing if all inputs are not signed
             finalizePSBT();
         }
     }

src/main/java/com/sparrowwallet/sparrow/transaction/InputController.java

@@ -11,7 +11,7 @@ import com.sparrowwallet.drongo.wallet.Keystore;
 import com.sparrowwallet.sparrow.EventManager;
 import com.sparrowwallet.sparrow.control.*;
 import com.sparrowwallet.sparrow.event.*;
-import javafx.collections.ListChangeListener;
+import javafx.collections.MapChangeListener;
 import javafx.fxml.FXML;
 import javafx.fxml.Initializable;
 import javafx.scene.control.*;
@@ -42,9 +42,6 @@ public class InputController extends TransactionFormController implements Initia
     @FXML
     private Hyperlink linkedOutpoint;
 
-    @FXML
-    private Button outpointSelect;
-
     @FXML
     private CoinLabel spends;
 
@@ -129,7 +126,7 @@ public class InputController extends TransactionFormController implements Initia
         initializeLocktimeFields(txInput);
 
         if(psbtInput != null) {
-            inputForm.getSignedKeystores().addListener((ListChangeListener<Keystore>) c -> {
+            inputForm.getSignatureKeystoreMap().addListener((MapChangeListener<TransactionSignature, Keystore>) c -> {
                 updateSignatures(inputForm.getPsbtInput());
             });
         }
@@ -143,7 +140,6 @@ public class InputController extends TransactionFormController implements Initia
 
         if(txInput.isCoinBase()) {
             outpoint.setText("Coinbase");
-            outpointSelect.setVisible(false);
             long totalAmt = 0;
             for(TransactionOutput output : inputForm.getTransaction().getOutputs()) {
                 totalAmt += output.getValue();
@@ -164,9 +160,6 @@ public class InputController extends TransactionFormController implements Initia
         } else if(inputForm.getInputTransactions() != null) {
             updateSpends(inputForm.getInputTransactions());
         }
-
-        //TODO: Enable select outpoint when wallet present
-        outpointSelect.setDisable(true);
     }
 
     private void updateOutpoint(Map<Sha256Hash, BlockTransaction> inputTransactions) {

src/main/java/com/sparrowwallet/sparrow/transaction/InputsController.java

@@ -13,7 +13,7 @@ import com.sparrowwallet.sparrow.event.BitcoinUnitChangedEvent;
 import com.sparrowwallet.sparrow.event.BlockTransactionFetchedEvent;
 import com.sparrowwallet.sparrow.event.PSBTCombinedEvent;
 import com.sparrowwallet.sparrow.event.PSBTFinalizedEvent;
-import javafx.collections.ListChangeListener;
+import javafx.collections.MapChangeListener;
 import javafx.fxml.FXML;
 import javafx.fxml.Initializable;
 import javafx.scene.chart.PieChart;
@@ -62,7 +62,7 @@ public class InputsController extends TransactionFormController implements Initi
 
         if(inputsForm.getPsbt() != null) {
             updatePSBTInputs(inputsForm.getPsbt());
-            inputsForm.getSignedKeystores().addListener((ListChangeListener<Keystore>) c -> {
+            inputsForm.getSignatureKeystoreMap().addListener((MapChangeListener<TransactionSignature, Keystore>) c -> {
                 updatePSBTInputs(inputsForm.getPsbt());
             });
         } else if(inputsForm.getInputTransactions() != null) {

src/main/java/com/sparrowwallet/sparrow/transaction/OutputController.java

@@ -1,16 +1,15 @@
 package com.sparrowwallet.sparrow.transaction;
 
 import com.google.common.eventbus.Subscribe;
+import com.sparrowwallet.drongo.KeyPurpose;
 import com.sparrowwallet.drongo.address.Address;
 import com.sparrowwallet.drongo.protocol.NonStandardScriptException;
 import com.sparrowwallet.drongo.protocol.TransactionInput;
 import com.sparrowwallet.drongo.protocol.TransactionOutput;
 import com.sparrowwallet.drongo.wallet.BlockTransaction;
+import com.sparrowwallet.drongo.wallet.Wallet;
 import com.sparrowwallet.sparrow.EventManager;
-import com.sparrowwallet.sparrow.control.AddressLabel;
-import com.sparrowwallet.sparrow.control.CoinLabel;
-import com.sparrowwallet.sparrow.control.CopyableLabel;
-import com.sparrowwallet.sparrow.control.ScriptArea;
+import com.sparrowwallet.sparrow.control.*;
 import com.sparrowwallet.sparrow.event.BitcoinUnitChangedEvent;
 import com.sparrowwallet.sparrow.event.BlockTransactionOutputsFetchedEvent;
 import com.sparrowwallet.sparrow.event.ViewTransactionEvent;
@@ -38,9 +37,6 @@ public class OutputController extends TransactionFormController implements Initi
     @FXML
     private CopyableLabel to;
 
-    @FXML
-    private CopyableLabel change;
-
     @FXML
     private AddressLabel address;
 
@@ -67,7 +63,10 @@ public class OutputController extends TransactionFormController implements Initi
     public void initializeView() {
         TransactionOutput txOutput = outputForm.getTransactionOutput();
 
-        outputFieldset.setText("Output #" + txOutput.getIndex());
+        outputForm.signingWalletProperty().addListener((observable, oldValue, signingWallet) -> {
+            updateOutputLegendFromWallet(txOutput, signingWallet);
+        });
+        updateOutputLegendFromWallet(txOutput, outputForm.getSigningWallet());
 
         value.setValue(txOutput.getValue());
         to.setVisible(false);
@@ -83,12 +82,6 @@ public class OutputController extends TransactionFormController implements Initi
             //ignore
         }
 
-        change.managedProperty().bind(change.visibleProperty());
-        change.setVisible(false);
-        outputForm.signingWalletProperty().addListener((observable, oldValue, signingWallet) -> {
-            change.setVisible(signingWallet != null && signingWallet.isWalletOutputScript(txOutput.getScript()));
-        });
-
         spentField.managedProperty().bind(spentField.visibleProperty());
         spentByField.managedProperty().bind(spentByField.visibleProperty());
         spentByField.setVisible(false);
@@ -106,6 +99,29 @@ public class OutputController extends TransactionFormController implements Initi
         scriptPubKeyArea.appendScript(txOutput.getScript(), null, null);
     }
 
+    private String getLegendText(TransactionOutput txOutput) {
+        return "Output #" + txOutput.getIndex();
+    }
+
+    private void updateOutputLegendFromWallet(TransactionOutput txOutput, Wallet signingWallet) {
+        String baseText = getLegendText(txOutput);
+        if(signingWallet != null) {
+            if(signingWallet.getWalletOutputScripts(KeyPurpose.RECEIVE).containsKey(txOutput.getScript())) {
+                outputFieldset.setText(baseText + " - Consolidation");
+                outputFieldset.setIcon(TransactionDiagram.getConsolidationGlyph());
+            } else if(signingWallet.getWalletOutputScripts(KeyPurpose.CHANGE).containsKey(txOutput.getScript())) {
+                outputFieldset.setText(baseText + " - Change");
+                outputFieldset.setIcon(TransactionDiagram.getChangeGlyph());
+            } else {
+                outputFieldset.setText(baseText + " - Payment");
+                outputFieldset.setIcon(TransactionDiagram.getPaymentGlyph());
+            }
+        } else {
+            outputFieldset.setText(baseText);
+            outputFieldset.setIcon(null);
+        }
+    }
+
     private void updateSpent(List<BlockTransaction> outputTransactions) {
         int outputIndex = outputForm.getIndex();
         if(outputIndex < outputForm.getMaxOutputFetched()) {

src/main/java/com/sparrowwallet/sparrow/transaction/TransactionData.java

@@ -2,6 +2,7 @@ package com.sparrowwallet.sparrow.transaction;
 
 import com.sparrowwallet.drongo.protocol.Sha256Hash;
 import com.sparrowwallet.drongo.protocol.Transaction;
+import com.sparrowwallet.drongo.protocol.TransactionSignature;
 import com.sparrowwallet.drongo.psbt.PSBT;
 import com.sparrowwallet.drongo.wallet.BlockTransaction;
 import com.sparrowwallet.drongo.wallet.Keystore;
@@ -9,9 +10,10 @@ import com.sparrowwallet.drongo.wallet.Wallet;
 import com.sparrowwallet.sparrow.io.Storage;
 import javafx.beans.property.SimpleObjectProperty;
 import javafx.collections.FXCollections;
-import javafx.collections.ObservableList;
 import javafx.collections.ObservableMap;
 
+import java.util.Collection;
+import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
 
@@ -30,7 +32,7 @@ public class TransactionData {
 
     private final ObservableMap<Wallet, Storage> availableWallets = FXCollections.observableHashMap();
     private final SimpleObjectProperty<Wallet> signingWallet = new SimpleObjectProperty<>(this, "signingWallet", null);
-    private final ObservableList<Keystore> signedKeystores = FXCollections.observableArrayList();
+    private final ObservableMap<TransactionSignature, Keystore> signatureKeystoreMap = FXCollections.observableMap(new LinkedHashMap<>());
 
     public TransactionData(String name, PSBT psbt) {
         this(name, psbt.getTransaction());
@@ -147,7 +149,11 @@ public class TransactionData {
         this.signingWallet.set(wallet);
     }
 
-    public ObservableList<Keystore> getSignedKeystores() {
-        return signedKeystores;
+    public ObservableMap<TransactionSignature, Keystore> getSignatureKeystoreMap() {
+        return signatureKeystoreMap;
+    }
+
+    public Collection<Keystore> getSignedKeystores() {
+        return signatureKeystoreMap.values();
     }
 }

src/main/java/com/sparrowwallet/sparrow/transaction/TransactionForm.java

@@ -2,17 +2,18 @@ package com.sparrowwallet.sparrow.transaction;
 
 import com.sparrowwallet.drongo.protocol.Sha256Hash;
 import com.sparrowwallet.drongo.protocol.Transaction;
+import com.sparrowwallet.drongo.protocol.TransactionSignature;
 import com.sparrowwallet.drongo.psbt.PSBT;
 import com.sparrowwallet.drongo.wallet.BlockTransaction;
 import com.sparrowwallet.drongo.wallet.Keystore;
 import com.sparrowwallet.drongo.wallet.Wallet;
 import com.sparrowwallet.sparrow.io.Storage;
 import javafx.beans.property.SimpleObjectProperty;
-import javafx.collections.ObservableList;
 import javafx.collections.ObservableMap;
 import javafx.scene.Node;
 
 import java.io.IOException;
+import java.util.Collection;
 import java.util.List;
 import java.util.Map;
 
@@ -83,7 +84,11 @@ public abstract class TransactionForm {
         txdata.setSigningWallet(signingWallet);
     }
 
-    public ObservableList<Keystore> getSignedKeystores() {
+    public ObservableMap<TransactionSignature, Keystore> getSignatureKeystoreMap() {
+        return txdata.getSignatureKeystoreMap();
+    }
+
+    public Collection<Keystore> getSignedKeystores() {
         return txdata.getSignedKeystores();
     }
 

src/main/java/com/sparrowwallet/sparrow/ur/Bytewords.java

@@ -14,7 +14,7 @@ import java.util.zip.CRC32;
  * Ported from https://github.com/BlockchainCommons/URKit
  */
 public class Bytewords {
-    public static final String BYTEWORDS = "ableacidalsoapexaquaarchatomauntawayaxisbackbaldbarnbeltbetabiasbluebodybragbrewbulbbuzzcalmcashcatschefcityclawcodecolacookcostcruxcurlcuspcyandarkdatadaysdelidicedietdoordowndrawdropdrumdulldutyeacheasyechoedgeepicevenexamexiteyesfactfairfernfigsfilmfishfizzflapflewfluxfoxyfreefrogfuelfundgalagamegeargemsgiftgirlglowgoodgraygrimgurugushgyrohalfhanghardhawkheathelphighhillholyhopehornhutsicedideaidleinchinkyintoirisironitemjadejazzjoinjoltjowljudojugsjumpjunkjurykeepkenokeptkeyskickkilnkingkitekiwiknoblamblavalazyleaflegsliarlistlimplionlogoloudloveluaulucklungmainmanymathmazememomenumeowmildmintmissmonknailnavyneednewsnextnoonnotenumbobeyoboeomitonyxopenovalowlspaidpartpeckplaypluspoempoolposepuffpumapurrquadquizraceramprealredorichroadrockroofrubyruinrunsrustsafesagascarsetssilkskewslotsoapsolosongstubsurfswantacotasktaxitenttiedtimetinytoiltombtoystriptunatwinuglyundouniturgeuservastveryvetovialvibeviewvisavoidvowswallwandwarmwaspwavewaxywebswhatwhenwhizwolfworkyankyawnyellyogayurtzapszestzinczonezoomzero";
+    public static final String BYTEWORDS = "ableacidalsoapexaquaarchatomauntawayaxisbackbaldbarnbeltbetabiasbluebodybragbrewbulbbuzzcalmcashcatschefcityclawcodecolacookcostcruxcurlcuspcyandarkdatadaysdelidicedietdoordowndrawdropdrumdulldutyeacheasyechoedgeepicevenexamexiteyesfactfairfernfigsfilmfishfizzflapflewfluxfoxyfreefrogfuelfundgalagamegeargemsgiftgirlglowgoodgraygrimgurugushgyrohalfhanghardhawkheathelphighhillholyhopehornhutsicedideaidleinchinkyintoirisironitemjadejazzjoinjoltjowljudojugsjumpjunkjurykeepkenokeptkeyskickkilnkingkitekiwiknoblamblavalazyleaflegsliarlimplionlistlogoloudloveluaulucklungmainmanymathmazememomenumeowmildmintmissmonknailnavyneednewsnextnoonnotenumbobeyoboeomitonyxopenovalowlspaidpartpeckplaypluspoempoolposepuffpumapurrquadquizraceramprealredorichroadrockroofrubyruinrunsrustsafesagascarsetssilkskewslotsoapsolosongstubsurfswantacotasktaxitenttiedtimetinytoiltombtoystriptunatwinuglyundouniturgeuservastveryvetovialvibeviewvisavoidvowswallwandwarmwaspwavewaxywebswhatwhenwhizwolfworkyankyawnyellyogayurtzapszerozestzinczonezoom";
     private static final List<String> bytewordsList;
     private static final List<String> minimalBytewordsList;