add software update check

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

@@ -19,6 +19,7 @@ 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;
@@ -70,8 +71,8 @@ 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");
 
@@ -125,6 +126,8 @@ public class AppController implements Initializable {
 
     private Hwi.ScheduledEnumerateService deviceEnumerateService;
 
+    private VersionCheckService versionCheckService;
+
     private static Integer currentBlockHeight;
 
     public static boolean showTxHexProperty;
@@ -247,9 +250,18 @@ 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();
                 }
             }
         });
@@ -272,6 +284,11 @@ public class AppController implements Initializable {
             ratesService.start();
         }
 
+        versionCheckService = createVersionCheckService();
+        if(config.getMode() == Mode.ONLINE && config.isCheckNewVersions()) {
+            versionCheckService.start();
+        }
+
         openTransactionIdItem.disableProperty().bind(onlineProperty.not());
     }
 
@@ -323,6 +340,22 @@ 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));
@@ -1171,6 +1204,20 @@ 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) {
@@ -1214,7 +1261,7 @@ 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());
             }
@@ -1285,6 +1332,16 @@ 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());

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/io/Config.java

@@ -23,6 +23,7 @@ public class Config {
     private boolean groupByAddress = true;
     private boolean includeMempoolChange = true;
     private boolean notifyNewTransactions = true;
+    private boolean checkNewVersions = true;
     private List<File> recentWalletFiles;
     private Integer keyDerivationPeriod;
     private File hwi;
@@ -135,6 +136,15 @@ public class Config {
         flush();
     }
 
+    public boolean isCheckNewVersions() {
+        return checkNewVersions;
+    }
+
+    public void setCheckNewVersions(boolean checkNewVersions) {
+        this.checkNewVersions = checkNewVersions;
+        flush();
+    }
+
     public List<File> getRecentWalletFiles() {
         return recentWalletFiles;
     }

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

@@ -0,0 +1,146 @@
+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()) {
+                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/resources/com/sparrowwallet/sparrow/preferences/general.fxml

@@ -73,6 +73,10 @@
                 <UnlabeledToggleSwitch fx:id="notifyNewTransactions" />
                 <HelpLabel helpText="Show system notifications on new wallet transactions"/>
             </Field>
+            <Field text="Software updates:">
+                <UnlabeledToggleSwitch fx:id="checkNewVersions" />
+                <HelpLabel helpText="Check for updates to Sparrow"/>
+            </Field>
         </Fieldset>
     </Form>
 </GridPane>