show lifehash for master fingerprint in settings and passphrase dialog

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

@@ -1,20 +1,23 @@
 package com.sparrowwallet.sparrow.control;
 
+import com.sparrowwallet.drongo.Utils;
 import com.sparrowwallet.drongo.wallet.Keystore;
+import com.sparrowwallet.drongo.wallet.MnemonicException;
 import com.sparrowwallet.sparrow.AppServices;
 import com.sparrowwallet.sparrow.glyphfont.FontAwesome5;
 import javafx.application.Platform;
-import javafx.scene.control.ButtonType;
-import javafx.scene.control.Dialog;
-import javafx.scene.control.DialogPane;
-import javafx.scene.control.Label;
+import javafx.beans.property.ObjectProperty;
+import javafx.beans.property.SimpleObjectProperty;
+import javafx.geometry.Pos;
+import javafx.scene.control.*;
+import javafx.scene.layout.HBox;
 import javafx.scene.layout.VBox;
 import org.controlsfx.control.textfield.CustomPasswordField;
-import org.controlsfx.control.textfield.TextFields;
 import org.controlsfx.glyphfont.Glyph;
 
 public class KeystorePassphraseDialog extends Dialog<String> {
     private final CustomPasswordField passphrase;
+    private final ObjectProperty<byte[]> masterFingerprint = new SimpleObjectProperty<>();
 
     public KeystorePassphraseDialog(Keystore keystore) {
         this(null, keystore);
@@ -45,10 +48,38 @@ public class KeystorePassphraseDialog extends Dialog<String> {
         content.setPrefHeight(50);
         content.getChildren().add(passphrase);
 
+        passphrase.textProperty().addListener((observable, oldValue, passphrase) -> {
+            masterFingerprint.set(getMasterFingerprint(keystore, passphrase));
+        });
+
+        HBox fingerprintBox = new HBox(10);
+        fingerprintBox.setAlignment(Pos.CENTER_LEFT);
+        Label fingerprintLabel = new Label("Master fingerprint:");
+        TextField fingerprintHex = new TextField();
+        fingerprintHex.setDisable(true);
+        fingerprintHex.setPrefWidth(90);
+        fingerprintHex.getStyleClass().addAll("fixed-width");
+        fingerprintHex.setStyle("-fx-opacity: 0.6");
+        masterFingerprint.addListener((observable, oldValue, newValue) -> {
+            if(newValue != null) {
+                fingerprintHex.setText(Utils.bytesToHex(newValue));
+            }
+        });
+        LifeHashIcon lifeHashIcon = new LifeHashIcon();
+        lifeHashIcon.dataProperty().bind(masterFingerprint);
+        HelpLabel helpLabel = new HelpLabel();
+        helpLabel.setHelpText("All passphrases create valid wallets." +
+                "\nThe master fingerprint identifies the keystore and changes as the passphrase changes." +
+                "\n" + (confirm ? "Take a moment to identify it before proceeding." : "Make sure you recognise it before proceeding."));
+        fingerprintBox.getChildren().addAll(fingerprintLabel, fingerprintHex, lifeHashIcon, helpLabel);
+        content.getChildren().add(fingerprintBox);
+
+        masterFingerprint.set(getMasterFingerprint(keystore, ""));
+
         Glyph warnGlyph = new Glyph(FontAwesome5.FONT_NAME, FontAwesome5.Glyph.EXCLAMATION_TRIANGLE);
         warnGlyph.getStyleClass().add("warn-icon");
         warnGlyph.setFontSize(12);
-        Label warnLabel = new Label("A BIP39 passphrase is not a wallet password!", warnGlyph);
+        Label warnLabel = new Label((confirm ? "Note" : "Check") + " the master fingerprint before proceeding!", warnGlyph);
         warnLabel.setGraphicTextGap(5);
         content.getChildren().add(warnLabel);
 
@@ -57,4 +88,14 @@ public class KeystorePassphraseDialog extends Dialog<String> {
 
         setResultConverter(dialogButton -> dialogButton == ButtonType.OK ? passphrase.getText() : null);
     }
+
+    private byte[] getMasterFingerprint(Keystore keystore, String passphrase) {
+        try {
+            Keystore copyKeystore = keystore.copy();
+            copyKeystore.getSeed().setPassphrase(passphrase);
+            return copyKeystore.getExtendedMasterPrivateKey().getKey().getFingerprint();
+        } catch(MnemonicException e) {
+            throw new RuntimeException(e);
+        }
+    }
 }

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

@@ -0,0 +1,70 @@
+package com.sparrowwallet.sparrow.control;
+
+import com.sparrowwallet.drongo.Utils;
+import com.sparrowwallet.sparrow.io.ImageUtils;
+import com.sparrowwallet.toucan.LifeHash;
+import com.sparrowwallet.toucan.LifeHashVersion;
+import javafx.beans.property.ObjectProperty;
+import javafx.beans.property.SimpleObjectProperty;
+import javafx.embed.swing.SwingFXUtils;
+import javafx.scene.Group;
+import javafx.scene.image.Image;
+import javafx.scene.paint.Color;
+import javafx.scene.paint.ImagePattern;
+import javafx.scene.shape.Rectangle;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.awt.image.BufferedImage;
+import java.util.Arrays;
+
+public class LifeHashIcon extends Group {
+    private static final Logger log = LoggerFactory.getLogger(LifeHashIcon.class);
+
+    private static final int SIZE = 24;
+
+    private final ObjectProperty<byte[]> dataProperty = new SimpleObjectProperty<>(null);
+
+    public LifeHashIcon() {
+        super();
+
+        dataProperty.addListener((observable, oldValue, data) -> {
+            if(data == null) {
+                getChildren().clear();
+            } else if(oldValue == null || !Arrays.equals(oldValue, data)) {
+                LifeHash.Image lifeHashImage = LifeHash.makeFromData(data, LifeHashVersion.VERSION2, 1, false);
+                BufferedImage bufferedImage = LifeHash.getBufferedImage(lifeHashImage);
+                BufferedImage resizedImage = ImageUtils.resizeToImage(bufferedImage, SIZE, SIZE);
+                Image image = SwingFXUtils.toFXImage(resizedImage, null);
+                setImage(image);
+            }
+        });
+    }
+
+    private void setImage(Image image) {
+        getChildren().clear();
+        Rectangle rectangle = new Rectangle(SIZE, SIZE);
+        rectangle.setArcWidth(6);
+        rectangle.setArcHeight(6);
+        rectangle.setFill(new ImagePattern(image));
+        rectangle.setStroke(Color.rgb(65, 72, 77));
+        rectangle.setStrokeWidth(1.0);
+        getChildren().add(rectangle);
+    }
+
+    public byte[] getData() {
+        return dataProperty.get();
+    }
+
+    public ObjectProperty<byte[]> dataProperty() {
+        return dataProperty;
+    }
+
+    public void setData(byte[] data) {
+        this.dataProperty.set(data);
+    }
+
+    public void setHex(String hex) {
+        setData(hex == null ? null : Utils.hexToBytes(hex));
+    }
+}

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

@@ -26,6 +26,14 @@ public class ImageUtils {
         resize(Thumbnails.of(image), outputStream, width, height);
     }
 
+    public static BufferedImage resizeToImage(BufferedImage image, int width, int height) {
+        try {
+            return Thumbnails.of(image).size(width, height).outputQuality(1).asBufferedImage();
+        } catch(IOException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
     public static byte[] resize(File file, int width, int height) throws IOException {
         ByteArrayOutputStream baos = new ByteArrayOutputStream();
         resize(file, baos, width, height);

src/main/java/com/sparrowwallet/sparrow/wallet/KeystoreController.java

@@ -73,6 +73,9 @@ public class KeystoreController extends WalletFormController implements Initiali
     @FXML
     private TextField fingerprint;
 
+    @FXML
+    private LifeHashIcon fingerprintIcon;
+
     @FXML
     private Button scanXpubQR;
 
@@ -134,6 +137,7 @@ public class KeystoreController extends WalletFormController implements Initiali
         if(keystore.getKeyDerivation() != null) {
             derivation.setText(keystore.getKeyDerivation().getDerivationPath());
             fingerprint.setText(keystore.getKeyDerivation().getMasterFingerprint());
+            fingerprintIcon.setHex(fingerprint.getText());
         } else {
             keystore.setKeyDerivation(new KeyDerivation("",""));
         }
@@ -144,8 +148,16 @@ public class KeystoreController extends WalletFormController implements Initiali
         });
         fingerprint.textProperty().addListener((observable, oldValue, newValue) -> {
             keystore.setKeyDerivation(new KeyDerivation(newValue, keystore.getKeyDerivation().getDerivationPath()));
+            fingerprintIcon.setHex(newValue.length() == 8 ? newValue : null);
             EventManager.get().post(new SettingsChangedEvent(walletForm.getWallet(), SettingsChangedEvent.Type.KEYSTORE_FINGERPRINT));
         });
+        fingerprint.setTextFormatter(new TextFormatter<>(change -> {
+            String input = change.getText();
+            if(input.matches("[0-9a-fA-F]*")) {
+                return change;
+            }
+            return null;
+        }));
         derivation.textProperty().addListener((observable, oldValue, newValue) -> {
             if(KeyDerivation.isValid(newValue) && !walletForm.getWallet().derivationMatchesAnotherScriptType(newValue)) {
                 keystore.setKeyDerivation(new KeyDerivation(keystore.getKeyDerivation().getMasterFingerprint(), newValue));

src/main/java/module-info.java

@@ -48,4 +48,5 @@ open module com.sparrowwallet.sparrow {
     requires com.googlecode.lanterna;
     requires net.coobird.thumbnailator;
     requires com.github.hervegirod;
+    requires com.sparrowwallet.toucan;
 }