recover slip39 shares to keystore seed and store as single slip39 share

drongo

@@ -1 +1 @@
-Subproject commit f066b5b608c4cff8873c776ef9c89e9194ccc332
+Subproject commit ebcee47771bfb4b81dc19d0159a168d3bd8a824d

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

@@ -1,5 +1,6 @@
 package com.sparrowwallet.sparrow.control;
 
+import com.sparrowwallet.drongo.wallet.DeterministicSeed;
 import com.sparrowwallet.drongo.wallet.Keystore;
 import com.sparrowwallet.drongo.wallet.WalletModel;
 import javafx.beans.property.SimpleListProperty;
@@ -15,10 +16,13 @@ import java.util.ArrayList;
 import java.util.List;
 
 public class MnemonicKeystoreDisplayPane extends MnemonicKeystorePane {
+    private final DeterministicSeed.Type type;
+
     public MnemonicKeystoreDisplayPane(Keystore keystore) {
         super(keystore.getSeed().getType().getName(), keystore.getSeed().needsPassphrase() && (keystore.getSeed().getPassphrase() == null || keystore.getSeed().getPassphrase().length() > 0) ? "Passphrase entered" : "No passphrase", "", "image/" + WalletModel.SEED.getType() + ".png");
         showHideLink.setVisible(false);
         buttonBox.getChildren().clear();
+        this.type = keystore.getSeed().getType();
 
         showWordList(keystore.getSeed());
     }
@@ -29,7 +33,7 @@ public class MnemonicKeystoreDisplayPane extends MnemonicKeystorePane {
         vBox.setSpacing(10);
 
         wordsPane = new TilePane();
-        wordsPane.setPrefRows(numWords / 3);
+        wordsPane.setPrefRows(Math.ceilDiv(numWords, 3));
         wordsPane.setHgap(10);
         wordsPane.setVgap(10);
         wordsPane.setOrientation(Orientation.VERTICAL);
@@ -43,7 +47,7 @@ public class MnemonicKeystoreDisplayPane extends MnemonicKeystorePane {
         wordEntriesProperty = new SimpleListProperty<>(wordEntryList);
         List<WordEntry> wordEntries = new ArrayList<>(numWords);
         for(int i = 0; i < numWords; i++) {
-            wordEntries.add(new WordEntry(i, wordEntryList));
+            wordEntries.add(new WordEntry(i, wordEntryList, getWordlistProvider()));
         }
         for(int i = 0; i < numWords - 1; i++) {
             wordEntries.get(i).setNextEntry(wordEntries.get(i + 1));
@@ -57,4 +61,9 @@ public class MnemonicKeystoreDisplayPane extends MnemonicKeystorePane {
         stackPane.getChildren().add(vBox);
         return stackPane;
     }
+
+    @Override
+    protected WordlistProvider getWordlistProvider() {
+        return getWordListProvider(type);
+    }
 }

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

@@ -2,8 +2,10 @@ package com.sparrowwallet.sparrow.control;
 
 import com.sparrowwallet.drongo.wallet.Bip39MnemonicCode;
 import com.sparrowwallet.drongo.wallet.DeterministicSeed;
+import com.sparrowwallet.drongo.wallet.MnemonicException;
+import com.sparrowwallet.drongo.wallet.slip39.Slip39MnemonicCode;
 import com.sparrowwallet.sparrow.AppServices;
-import com.sparrowwallet.sparrow.glyphfont.FontAwesome5;
+import com.sparrowwallet.sparrow.glyphfont.GlyphUtils;
 import javafx.application.Platform;
 import javafx.beans.property.IntegerProperty;
 import javafx.beans.property.SimpleIntegerProperty;
@@ -153,6 +155,10 @@ public class MnemonicKeystorePane extends TitledDescriptionPane {
 
     protected void showWordList(DeterministicSeed seed) {
         List<String> words = seed.getMnemonicCode();
+        showWordList(words);
+    }
+
+    protected void showWordList(List<String> words) {
         setContent(getMnemonicWordsEntry(words.size(), true, true));
         setExpanded(true);
 
@@ -175,7 +181,7 @@ public class MnemonicKeystorePane extends TitledDescriptionPane {
         vBox.setSpacing(10);
 
         wordsPane = new TilePane();
-        wordsPane.setPrefRows(numWords/3);
+        wordsPane.setPrefRows(Math.ceilDiv(numWords, 3));
         wordsPane.setHgap(10);
         wordsPane.setVgap(10);
         wordsPane.setOrientation(Orientation.VERTICAL);
@@ -189,7 +195,7 @@ public class MnemonicKeystorePane extends TitledDescriptionPane {
         wordEntriesProperty = new SimpleListProperty<>(wordEntryList);
         List<WordEntry> wordEntries = new ArrayList<>(numWords);
         for(int i = 0; i < numWords; i++) {
-            wordEntries.add(new WordEntry(i, wordEntryList));
+            wordEntries.add(new WordEntry(i, wordEntryList, getWordlistProvider()));
         }
         for(int i = 0; i < numWords - 1; i++) {
             wordEntries.get(i).setNextEntry(wordEntries.get(i + 1));
@@ -215,7 +221,7 @@ public class MnemonicKeystorePane extends TitledDescriptionPane {
         buttonPane.getChildren().add(leftBox);
         AnchorPane.setLeftAnchor(leftBox, 0.0);
 
-        validLabel = new Label("Valid checksum", getValidGlyph());
+        validLabel = new Label("Valid checksum", GlyphUtils.getSuccessGlyph());
         validLabel.setContentDisplay(ContentDisplay.LEFT);
         validLabel.setGraphicTextGap(5.0);
         validLabel.managedProperty().bind(validLabel.visibleProperty());
@@ -224,7 +230,7 @@ public class MnemonicKeystorePane extends TitledDescriptionPane {
         AnchorPane.setTopAnchor(validLabel, 5.0);
         AnchorPane.setLeftAnchor(validLabel, 0.0);
 
-        invalidLabel = new Label("Invalid checksum", getInvalidGlyph());
+        invalidLabel = new Label("Invalid checksum", GlyphUtils.getInvalidGlyph());
         invalidLabel.setContentDisplay(ContentDisplay.LEFT);
         invalidLabel.setGraphicTextGap(5.0);
         invalidLabel.managedProperty().bind(invalidLabel.visibleProperty());
@@ -242,7 +248,7 @@ public class MnemonicKeystorePane extends TitledDescriptionPane {
                     empty = false;
                 }
 
-                if(!WordEntry.isValid(word)) {
+                if(!getWordlistProvider().isValid(word)) {
                     validWords = false;
                 }
             }
@@ -278,13 +284,20 @@ public class MnemonicKeystorePane extends TitledDescriptionPane {
         //nothing by default
     }
 
+    protected WordlistProvider getWordlistProvider() {
+        return getWordListProvider(DeterministicSeed.Type.BIP39);
+    }
+
+    protected WordlistProvider getWordListProvider(DeterministicSeed.Type type) {
+        return type == DeterministicSeed.Type.SLIP39 ? new Slip39WordlistProvider() : new Bip39WordlistProvider();
+    }
+
     protected static class WordEntry extends HBox {
-        private static List<String> wordList;
         private final TextField wordField;
         private WordEntry nextEntry;
         private TextField nextField;
 
-        public WordEntry(int wordNumber, ObservableList<String> wordEntryList) {
+        public WordEntry(int wordNumber, ObservableList<String> wordEntryList, WordlistProvider wordlistProvider) {
             super();
             setAlignment(Pos.CENTER_RIGHT);
 
@@ -302,7 +315,7 @@ public class MnemonicKeystorePane extends TitledDescriptionPane {
                         for(int i = 0; i < words.length; i++) {
                             String word = words[i];
                             if(entry.nextField != null) {
-                                if(i == words.length - 2 && isValid(word)) {
+                                if(i == words.length - 2 && wordlistProvider.isValid(word)) {
                                     label.requestFocus();
                                 } else {
                                     entry.nextField.requestFocus();
@@ -335,8 +348,7 @@ public class MnemonicKeystorePane extends TitledDescriptionPane {
             });
             wordField.setTextFormatter(formatter);
 
-            wordList = Bip39MnemonicCode.INSTANCE.getWordList();
+            AutoCompletionBinding<String> autoCompletionBinding = TextFields.bindAutoCompletion(wordField, new WordlistSuggestionProvider(wordlistProvider, wordNumber, wordEntryList));
-            AutoCompletionBinding<String> autoCompletionBinding = TextFields.bindAutoCompletion(wordField, new WordlistSuggestionProvider(wordList, wordNumber, wordEntryList));
             autoCompletionBinding.setDelay(50);
             autoCompletionBinding.setOnAutoCompleted(event -> {
                 if(nextField != null) {
@@ -357,7 +369,7 @@ public class MnemonicKeystorePane extends TitledDescriptionPane {
             ValidationSupport validationSupport = new ValidationSupport();
             validationSupport.setValidationDecorator(new StyleClassValidationDecoration());
             validationSupport.registerValidator(wordField, Validator.combine(
-                    (Control c, String newValue) -> ValidationResult.fromErrorIf( c, "Invalid word", (newValue.length() > 0 || !lastWord) && !wordList.contains(newValue))
+                    (Control c, String newValue) -> ValidationResult.fromErrorIf( c, "Invalid word", (newValue.length() > 0 || !lastWord) && !wordlistProvider.isValid(newValue))
             ));
 
             wordField.textProperty().addListener((observable, oldValue, newValue) -> {
@@ -378,28 +390,24 @@ public class MnemonicKeystorePane extends TitledDescriptionPane {
         public void setNextField(TextField field) {
             this.nextField = field;
         }
-
-        public static boolean isValid(String word) {
-            return wordList.contains(word);
-        }
     }
 
     protected static class WordlistSuggestionProvider implements Callback<AutoCompletionBinding.ISuggestionRequest, Collection<String>> {
-        private final List<String> wordList;
+        private final WordlistProvider wordlistProvider;
         private final int wordNumber;
         private final ObservableList<String> wordEntryList;
 
-        public WordlistSuggestionProvider(List<String> wordList, int wordNumber, ObservableList<String> wordEntryList) {
+        public WordlistSuggestionProvider(WordlistProvider wordlistProvider, int wordNumber, ObservableList<String> wordEntryList) {
-            this.wordList = wordList;
+            this.wordlistProvider = wordlistProvider;
             this.wordNumber = wordNumber;
             this.wordEntryList = wordEntryList;
         }
 
         @Override
         public Collection<String> call(AutoCompletionBinding.ISuggestionRequest request) {
-            if(wordNumber == wordEntryList.size() - 1 && allPreviousWordsValid()) {
+            if(wordlistProvider.supportsPossibleLastWords() && wordNumber == wordEntryList.size() - 1 && allPreviousWordsValid()) {
                 try {
-                    List<String> possibleLastWords = Bip39MnemonicCode.INSTANCE.getPossibleLastWords(wordEntryList.subList(0, wordEntryList.size() - 1));
+                    List<String> possibleLastWords = wordlistProvider.getPossibleLastWords(wordEntryList.subList(0, wordEntryList.size() - 1));
                     if(!request.getUserText().isEmpty()) {
                         possibleLastWords.removeIf(s -> !s.startsWith(request.getUserText()));
                     }
@@ -412,7 +420,7 @@ public class MnemonicKeystorePane extends TitledDescriptionPane {
 
             List<String> suggestions = new ArrayList<>();
             if(!request.getUserText().isEmpty()) {
-                for(String word : wordList) {
+                for(String word : wordlistProvider.getWordlist()) {
                     if(word.startsWith(request.getUserText())) {
                         suggestions.add(word);
                     }
@@ -424,7 +432,7 @@ public class MnemonicKeystorePane extends TitledDescriptionPane {
 
         private boolean allPreviousWordsValid() {
             for(int i = 0; i < wordEntryList.size() - 1; i++) {
-                if(!WordEntry.isValid(wordEntryList.get(i))) {
+                if(!wordlistProvider.isValid(wordEntryList.get(i))) {
                     return false;
                 }
             }
@@ -485,17 +493,53 @@ public class MnemonicKeystorePane extends TitledDescriptionPane {
         }
     }
 
-    public static Glyph getValidGlyph() {
+    protected interface WordlistProvider {
-        Glyph validGlyph = new Glyph(FontAwesome5.FONT_NAME, FontAwesome5.Glyph.CHECK_CIRCLE);
+        List<String> getWordlist();
-        validGlyph.getStyleClass().add("success");
+        boolean isValid(String word);
-        validGlyph.setFontSize(12);
+        boolean supportsPossibleLastWords();
-        return validGlyph;
+        List<String> getPossibleLastWords(List<String> previousWords) throws MnemonicException.MnemonicLengthException, MnemonicException.MnemonicWordException;
     }
 
-    public static Glyph getInvalidGlyph() {
+    private static class Bip39WordlistProvider implements WordlistProvider {
-        Glyph invalidGlyph = new Glyph(FontAwesome5.FONT_NAME, FontAwesome5.Glyph.EXCLAMATION_CIRCLE);
+        @Override
-        invalidGlyph.getStyleClass().add("failure");
+        public List<String> getWordlist() {
-        invalidGlyph.setFontSize(12);
+            return Bip39MnemonicCode.INSTANCE.getWordList();
-        return invalidGlyph;
+        }
+
+        public boolean isValid(String word) {
+            return getWordlist().contains(word);
+        }
+
+        @Override
+        public boolean supportsPossibleLastWords() {
+            return true;
+        }
+
+        @Override
+        public List<String> getPossibleLastWords(List<String> previousWords) throws MnemonicException.MnemonicLengthException, MnemonicException.MnemonicWordException {
+            return Bip39MnemonicCode.INSTANCE.getPossibleLastWords(previousWords);
+        }
+    }
+
+    private static class Slip39WordlistProvider implements WordlistProvider {
+        @Override
+        public List<String> getWordlist() {
+            return Slip39MnemonicCode.INSTANCE.getWordList();
+        }
+
+        @Override
+        public boolean isValid(String word) {
+            return getWordlist().contains(word);
+        }
+
+        @Override
+        public boolean supportsPossibleLastWords() {
+            return false;
+        }
+
+        @Override
+        public List<String> getPossibleLastWords(List<String> previousWords) {
+            throw new UnsupportedOperationException();
+        }
     }
 }

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

@@ -0,0 +1,313 @@
+package com.sparrowwallet.sparrow.control;
+
+import com.sparrowwallet.drongo.KeyDerivation;
+import com.sparrowwallet.drongo.crypto.ChildNumber;
+import com.sparrowwallet.drongo.protocol.ScriptType;
+import com.sparrowwallet.drongo.wallet.DeterministicSeed;
+import com.sparrowwallet.drongo.wallet.Keystore;
+import com.sparrowwallet.drongo.wallet.MnemonicException;
+import com.sparrowwallet.drongo.wallet.Wallet;
+import com.sparrowwallet.drongo.wallet.slip39.Share;
+import com.sparrowwallet.sparrow.EventManager;
+import com.sparrowwallet.sparrow.event.KeystoreImportEvent;
+import com.sparrowwallet.sparrow.glyphfont.FontAwesome5;
+import com.sparrowwallet.sparrow.glyphfont.GlyphUtils;
+import com.sparrowwallet.sparrow.io.ImportException;
+import com.sparrowwallet.sparrow.io.KeystoreMnemonicShareImport;
+import com.sparrowwallet.sparrow.io.Slip39;
+import javafx.beans.property.SimpleIntegerProperty;
+import javafx.geometry.Insets;
+import javafx.geometry.Pos;
+import javafx.scene.Node;
+import javafx.scene.control.*;
+import javafx.scene.layout.HBox;
+import javafx.scene.layout.Priority;
+import org.controlsfx.glyphfont.Glyph;
+import org.controlsfx.validation.ValidationResult;
+import org.controlsfx.validation.ValidationSupport;
+import org.controlsfx.validation.Validator;
+import org.controlsfx.validation.decoration.StyleClassValidationDecoration;
+
+import java.util.*;
+
+public class MnemonicShareKeystoreImportPane extends MnemonicKeystorePane {
+    protected final Wallet wallet;
+    private final KeystoreMnemonicShareImport importer;
+    private final KeyDerivation defaultDerivation;
+    private final List<List<String>> mnemonicShares = new ArrayList<>();
+
+    private SplitMenuButton importButton;
+
+    private Button calculateButton;
+    private Button backButton;
+    private Button nextButton;
+    private int currentShare;
+
+    public MnemonicShareKeystoreImportPane(Wallet wallet, KeystoreMnemonicShareImport importer, KeyDerivation defaultDerivation) {
+        super(importer.getName(), "Enter seed share", importer.getKeystoreImportDescription(), "image/" + importer.getWalletModel().getType() + ".png");
+        this.wallet = wallet;
+        this.importer = importer;
+        this.defaultDerivation = defaultDerivation;
+
+        createImportButton();
+        buttonBox.getChildren().add(importButton);
+    }
+
+    @Override
+    protected Control createButton() {
+        createEnterMnemonicButton();
+        return enterMnemonicButton;
+    }
+
+    private void createEnterMnemonicButton() {
+        enterMnemonicButton = new SplitMenuButton();
+        enterMnemonicButton.setAlignment(Pos.CENTER_RIGHT);
+        enterMnemonicButton.setText("Use 20 Words");
+        defaultWordSizeProperty = new SimpleIntegerProperty(20);
+        defaultWordSizeProperty.addListener((observable, oldValue, newValue) -> {
+            enterMnemonicButton.setText("Use " + newValue + " Words");
+        });
+        enterMnemonicButton.setOnAction(event -> {
+            resetShares();
+            enterMnemonic(defaultWordSizeProperty.get());
+        });
+        int[] numberWords = new int[] {20, 33};
+        for(int i = 0; i < numberWords.length; i++) {
+            MenuItem item = new MenuItem("Use " + numberWords[i] + " Words");
+            final int words = numberWords[i];
+            item.setOnAction(event -> {
+                resetShares();
+                defaultWordSizeProperty.set(words);
+                enterMnemonic(words);
+            });
+            enterMnemonicButton.getItems().add(item);
+        }
+        enterMnemonicButton.managedProperty().bind(enterMnemonicButton.visibleProperty());
+    }
+
+    protected List<Node> createRightButtons() {
+        calculateButton = new Button("Create Keystore");
+        calculateButton.setDefaultButton(true);
+        calculateButton.setOnAction(event -> {
+            prepareImport();
+        });
+        calculateButton.managedProperty().bind(calculateButton.visibleProperty());
+        calculateButton.setTooltip(new Tooltip("Create the keystore from the provided shares"));
+        calculateButton.setVisible(false);
+
+        backButton = new Button("Back");
+        backButton.setOnAction(event -> {
+            lastShare();
+        });
+        backButton.managedProperty().bind(backButton.visibleProperty());
+        backButton.setTooltip(new Tooltip("Display the last share added"));
+        backButton.setVisible(currentShare > 0);
+
+        nextButton = new Button("Next");
+        nextButton.setOnAction(event -> {
+            nextShare();
+        });
+        nextButton.managedProperty().bind(nextButton.visibleProperty());
+        nextButton.setTooltip(new Tooltip("Add the next share"));
+        nextButton.visibleProperty().bind(calculateButton.visibleProperty().not());
+        nextButton.setDefaultButton(true);
+        nextButton.setDisable(true);
+
+        return List.of(backButton, nextButton, calculateButton);
+    }
+
+    private void resetShares() {
+        currentShare = 0;
+        mnemonicShares.clear();
+    }
+
+    private void lastShare() {
+        currentShare--;
+        showWordList(mnemonicShares.get(currentShare));
+    }
+
+    private void nextShare() {
+        if(currentShare == mnemonicShares.size()) {
+            mnemonicShares.add(wordEntriesProperty.get());
+        } else {
+            mnemonicShares.set(currentShare, wordEntriesProperty.get());
+        }
+
+        currentShare++;
+
+        if(currentShare < mnemonicShares.size()) {
+            showWordList(mnemonicShares.get(currentShare));
+        } else {
+            setContent(getMnemonicWordsEntry(defaultWordSizeProperty.get(), true, true));
+        }
+        setExpanded(true);
+    }
+
+    protected void onWordChange(boolean empty, boolean validWords, boolean validChecksum) {
+        boolean validSet = false;
+        boolean complete = false;
+        if(!empty && validWords) {
+            try {
+                Share.fromMnemonic(String.join(" ", wordEntriesProperty.get()));
+                validChecksum = true;
+
+                List<List<String>> existing = new ArrayList<>(mnemonicShares);
+                if(currentShare >= mnemonicShares.size()) {
+                    existing.add(wordEntriesProperty.get());
+                }
+
+                importer.getKeystore(wallet.getScriptType().getDefaultDerivation(), existing, passphraseProperty.get());
+                validSet = true;
+                complete = true;
+            } catch(MnemonicException e) {
+                invalidLabel.setText(e.getTitle());
+                invalidLabel.setTooltip(new Tooltip(e.getMessage()));
+            } catch(Slip39.Slip39ProgressException e) {
+                validSet = true;
+                invalidLabel.setText(e.getTitle());
+                invalidLabel.setTooltip(new Tooltip(e.getMessage()));
+            } catch(ImportException e) {
+                if(e.getCause() instanceof MnemonicException mnemonicException) {
+                    invalidLabel.setText(mnemonicException.getTitle());
+                    invalidLabel.setTooltip(new Tooltip(mnemonicException.getMessage()));
+                } else {
+                    invalidLabel.setText("Import Error");
+                    invalidLabel.setTooltip(new Tooltip(e.getMessage()));
+                }
+            }
+        }
+
+        calculateButton.setVisible(complete);
+        backButton.setVisible(currentShare > 0 && !complete);
+        nextButton.setDisable(!validChecksum || !validSet);
+        validLabel.setVisible(complete);
+        validLabel.setText(mnemonicShares.isEmpty() ? "Valid checksum" : "Completed share set");
+        invalidLabel.setVisible(!complete && !empty);
+        invalidLabel.setGraphic(validChecksum && validSet ? getIncompleteGlyph() : GlyphUtils.getFailureGlyph());
+    }
+
+    private void createImportButton() {
+        importButton = new SplitMenuButton();
+        importButton.setAlignment(Pos.CENTER_RIGHT);
+        importButton.setText("Import Keystore");
+        importButton.getStyleClass().add("default-button");
+        importButton.setOnAction(event -> {
+            importButton.setDisable(true);
+            importKeystore(getDefaultDerivation(), false);
+        });
+        String[] accounts = new String[] {"Import Default Account #0", "Import Account #1", "Import Account #2", "Import Account #3", "Import Account #4", "Import Account #5", "Import Account #6", "Import Account #7", "Import Account #8", "Import Account #9"};
+        int scriptAccountsLength = ScriptType.P2SH.equals(wallet.getScriptType()) ? 1 : accounts.length;
+        for(int i = 0; i < scriptAccountsLength; i++) {
+            MenuItem item = new MenuItem(accounts[i]);
+            final List<ChildNumber> derivation = wallet.getScriptType().getDefaultDerivation(i);
+            item.setOnAction(event -> {
+                importButton.setDisable(true);
+                importKeystore(derivation, false);
+            });
+            importButton.getItems().add(item);
+        }
+
+        importButton.managedProperty().bind(importButton.visibleProperty());
+        importButton.setVisible(false);
+    }
+
+    private List<ChildNumber> getDefaultDerivation() {
+        return defaultDerivation == null || defaultDerivation.getDerivation().isEmpty() ? wallet.getScriptType().getDefaultDerivation() : defaultDerivation.getDerivation();
+    }
+
+    private void prepareImport() {
+        nextShare();
+        backButton.setVisible(false);
+
+        if(importKeystore(wallet.getScriptType().getDefaultDerivation(), true)) {
+            setExpanded(true);
+            enterMnemonicButton.setVisible(false);
+            importButton.setVisible(true);
+            importButton.setDisable(false);
+            setDescription("Ready to import");
+            showHideLink.setText("Show Derivation...");
+            showHideLink.setVisible(false);
+            setContent(getDerivationEntry(getDefaultDerivation()));
+        }
+    }
+
+    private boolean importKeystore(List<ChildNumber> derivation, boolean dryrun) {
+        importButton.setDisable(true);
+        try {
+            Keystore keystore = importer.getKeystore(derivation, mnemonicShares, passphraseProperty.get());
+            if(!dryrun) {
+                if(passphraseProperty.get() != null && !passphraseProperty.get().isEmpty()) {
+                    KeystorePassphraseDialog keystorePassphraseDialog = new KeystorePassphraseDialog(null, keystore, true);
+                    keystorePassphraseDialog.initOwner(this.getScene().getWindow());
+                    Optional<String> optPassphrase = keystorePassphraseDialog.showAndWait();
+                    if(optPassphrase.isEmpty() || !optPassphrase.get().equals(passphraseProperty.get())) {
+                        throw new ImportException("Re-entered passphrase did not match");
+                    }
+                }
+
+                EventManager.get().post(new KeystoreImportEvent(keystore));
+            }
+            return true;
+        } catch (ImportException e) {
+            String errorMessage = e.getMessage();
+            if(e.getCause() instanceof MnemonicException.MnemonicChecksumException) {
+                errorMessage = "Invalid word list - checksum incorrect";
+            } else if(e.getCause() != null && e.getCause().getMessage() != null && !e.getCause().getMessage().isEmpty()) {
+                errorMessage = e.getCause().getMessage();
+            }
+            setError("Import Error", errorMessage + ".");
+            importButton.setDisable(false);
+            return false;
+        }
+    }
+
+    private Node getDerivationEntry(List<ChildNumber> derivation) {
+        TextField derivationField = new TextField();
+        derivationField.setPromptText("Derivation path");
+        derivationField.setText(KeyDerivation.writePath(derivation));
+        HBox.setHgrow(derivationField, Priority.ALWAYS);
+
+        ValidationSupport validationSupport = new ValidationSupport();
+        validationSupport.setValidationDecorator(new StyleClassValidationDecoration());
+        validationSupport.registerValidator(derivationField, Validator.combine(
+                Validator.createEmptyValidator("Derivation is required"),
+                (Control c, String newValue) -> ValidationResult.fromErrorIf( c, "Invalid derivation", !KeyDerivation.isValid(newValue))
+        ));
+
+        Button importDerivationButton = new Button("Import Custom Derivation Keystore");
+        importDerivationButton.setDisable(true);
+        importDerivationButton.setOnAction(event -> {
+            showHideLink.setVisible(true);
+            setExpanded(false);
+            List<ChildNumber> importDerivation = KeyDerivation.parsePath(derivationField.getText());
+            importKeystore(importDerivation, false);
+        });
+
+        derivationField.textProperty().addListener((observable, oldValue, newValue) -> {
+            importButton.setDisable(newValue.isEmpty() || !KeyDerivation.isValid(newValue) || !KeyDerivation.parsePath(newValue).equals(derivation));
+            importDerivationButton.setDisable(newValue.isEmpty() || !KeyDerivation.isValid(newValue) || KeyDerivation.parsePath(newValue).equals(derivation));
+        });
+
+        HBox contentBox = new HBox();
+        contentBox.setAlignment(Pos.TOP_RIGHT);
+        contentBox.setSpacing(20);
+        contentBox.getChildren().add(derivationField);
+        contentBox.getChildren().add(importDerivationButton);
+        contentBox.setPadding(new Insets(10, 30, 10, 30));
+        contentBox.setPrefHeight(60);
+
+        return contentBox;
+    }
+
+    public static Glyph getIncompleteGlyph() {
+        Glyph warningGlyph = new Glyph(FontAwesome5.FONT_NAME, FontAwesome5.Glyph.PLUS_CIRCLE);
+        warningGlyph.getStyleClass().add("warn-icon");
+        warningGlyph.setFontSize(12);
+        return warningGlyph;
+    }
+
+    @Override
+    protected WordlistProvider getWordlistProvider() {
+        return getWordListProvider(DeterministicSeed.Type.SLIP39);
+    }
+}

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

@@ -1,5 +1,6 @@
 package com.sparrowwallet.sparrow.control;
 
+import com.sparrowwallet.drongo.wallet.DeterministicSeed;
 import com.sparrowwallet.drongo.wallet.Keystore;
 import com.sparrowwallet.drongo.wallet.SeedQR;
 import com.sparrowwallet.sparrow.AppServices;
@@ -17,7 +18,7 @@ public class SeedDisplayDialog extends Dialog<Void> {
         dialogPane.getStylesheets().add(AppServices.class.getResource("general.css").toExternalForm());
         AppServices.setStageIcon(dialogPane.getScene().getWindow());
 
-        int lines = decryptedKeystore.getSeed().getMnemonicCode().size() / 3;
+        int lines = Math.ceilDiv(decryptedKeystore.getSeed().getMnemonicCode().size(), 3);
         int height = lines * 40;
 
         StackPane stackPane = new StackPane();
@@ -43,15 +44,19 @@ public class SeedDisplayDialog extends Dialog<Void> {
 
         stackPane.getChildren().addAll(anchorPane);
 
+        if(decryptedKeystore.getSeed().getType() == DeterministicSeed.Type.BIP39) {
             final ButtonType seedQRButtonType = new javafx.scene.control.ButtonType("Show SeedQR", ButtonBar.ButtonData.LEFT);
-        final ButtonType cancelButtonType = new javafx.scene.control.ButtonType("Cancel", ButtonBar.ButtonData.CANCEL_CLOSE);
+            dialogPane.getButtonTypes().add(seedQRButtonType);
-        dialogPane.getButtonTypes().addAll(seedQRButtonType, cancelButtonType);
 
             Button seedQRButton = (Button)dialogPane.lookupButton(seedQRButtonType);
             seedQRButton.addEventFilter(ActionEvent.ACTION, event -> {
                 event.consume();
                 showSeedQR(decryptedKeystore);
             });
+        }
+
+        final ButtonType cancelButtonType = new javafx.scene.control.ButtonType("Cancel", ButtonBar.ButtonData.CANCEL_CLOSE);
+        dialogPane.getButtonTypes().add(cancelButtonType);
 
         dialogPane.setPrefWidth(500);
         dialogPane.setPrefHeight(150 + height);

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

@@ -183,6 +183,13 @@ public class GlyphUtils {
         return successGlyph;
     }
 
+    public static Glyph getInvalidGlyph() {
+        Glyph invalidGlyph = new Glyph(FontAwesome5.FONT_NAME, FontAwesome5.Glyph.EXCLAMATION_CIRCLE);
+        invalidGlyph.getStyleClass().add("failure");
+        invalidGlyph.setFontSize(12);
+        return invalidGlyph;
+    }
+
     public static Glyph getWarningGlyph() {
         Glyph warningGlyph = new Glyph(FontAwesome5.FONT_NAME, FontAwesome5.Glyph.EXCLAMATION_TRIANGLE);
         warningGlyph.getStyleClass().add("warn-icon");

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

@@ -0,0 +1,10 @@
+package com.sparrowwallet.sparrow.io;
+
+import com.sparrowwallet.drongo.crypto.ChildNumber;
+import com.sparrowwallet.drongo.wallet.Keystore;
+
+import java.util.List;
+
+public interface KeystoreMnemonicShareImport extends KeystoreImport {
+    Keystore getKeystore(List<ChildNumber> derivation, List<List<String>> mnemonicShares, String passphrase) throws ImportException;
+}

src/main/java/com/sparrowwallet/sparrow/io/Slip39.java

@@ -0,0 +1,60 @@
+package com.sparrowwallet.sparrow.io;
+
+import com.sparrowwallet.drongo.crypto.ChildNumber;
+import com.sparrowwallet.drongo.wallet.*;
+import com.sparrowwallet.drongo.wallet.slip39.RecoveryState;
+import com.sparrowwallet.drongo.wallet.slip39.Share;
+
+import java.nio.charset.StandardCharsets;
+import java.util.List;
+
+public class Slip39 implements KeystoreMnemonicShareImport {
+    @Override
+    public String getName() {
+        return "Mnemonic Shares (SLIP39)";
+    }
+
+    @Override
+    public WalletModel getWalletModel() {
+        return WalletModel.SEED;
+    }
+
+    @Override
+    public String getKeystoreImportDescription() {
+        return "Import your 20 or 33 word mnemonic shares and optional passphrase.";
+    }
+
+    @Override
+    public Keystore getKeystore(List<ChildNumber> derivation, List<List<String>> mnemonicShares, String passphrase) throws ImportException {
+        try {
+            RecoveryState recoveryState = new RecoveryState();
+            for(List<String> mnemonicWords : mnemonicShares) {
+                Share share = Share.fromMnemonic(String.join(" ", mnemonicWords));
+                recoveryState.addShare(share);
+            }
+
+            if(recoveryState.isComplete()) {
+                byte[] secret = recoveryState.recover(passphrase.getBytes(StandardCharsets.UTF_8));
+                DeterministicSeed seed = new DeterministicSeed(secret, passphrase, System.currentTimeMillis(), DeterministicSeed.Type.SLIP39);
+                return Keystore.fromSeed(seed, derivation);
+            } else {
+                throw new Slip39ProgressException(recoveryState.getShortStatus(), recoveryState.getStatus());
+            }
+        } catch(MnemonicException e) {
+            throw new ImportException(e);
+        }
+    }
+
+    public static class Slip39ProgressException extends ImportException {
+        private final String title;
+
+        public Slip39ProgressException(String title, String message) {
+            super(message);
+            this.title = title;
+        }
+
+        public String getTitle() {
+            return title;
+        }
+    }
+}

src/main/java/com/sparrowwallet/sparrow/io/db/KeystoreDao.java

@@ -63,7 +63,7 @@ public interface KeystoreDao {
                     long id = insertSeed(seed.getType().ordinal(), null, data.getInitialisationVector(), data.getEncryptedBytes(), data.getKeySalt(), data.getEncryptionType().getDeriver().ordinal(), data.getEncryptionType().getCrypter().ordinal(), seed.needsPassphrase(), seed.getCreationTimeSeconds());
                     seed.setId(id);
                 } else {
-                    long id = insertSeed(seed.getType().ordinal(), seed.getMnemonicString().asString(), null, null, null, null, null, seed.needsPassphrase(), seed.getCreationTimeSeconds());
+                    long id = insertSeed(seed.getType().ordinal(), seed.getMnemonicString(true).asString(), null, null, null, null, null, seed.needsPassphrase(), seed.getCreationTimeSeconds());
                     seed.setId(id);
                 }
             }
@@ -96,7 +96,7 @@ public interface KeystoreDao {
                 EncryptedData data = seed.getEncryptedData();
                 updateSeed(seed.getType().ordinal(), null, data.getInitialisationVector(), data.getEncryptedBytes(), data.getKeySalt(), data.getEncryptionType().getDeriver().ordinal(), data.getEncryptionType().getCrypter().ordinal(), seed.needsPassphrase(), seed.getCreationTimeSeconds(), seed.getId());
             } else {
-                updateSeed(seed.getType().ordinal(), seed.getMnemonicString().asString(), null, null, null, null, null, seed.needsPassphrase(), seed.getCreationTimeSeconds(), seed.getId());
+                updateSeed(seed.getType().ordinal(), seed.getMnemonicString(true).asString(), null, null, null, null, null, seed.needsPassphrase(), seed.getCreationTimeSeconds(), seed.getId());
             }
         }
     }

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

@@ -1,9 +1,6 @@
 package com.sparrowwallet.sparrow.keystoreimport;
 
-import com.sparrowwallet.sparrow.control.FileKeystoreImportPane;
+import com.sparrowwallet.sparrow.control.*;
-import com.sparrowwallet.sparrow.control.MnemonicKeystoreImportPane;
-import com.sparrowwallet.sparrow.control.TitledDescriptionPane;
-import com.sparrowwallet.sparrow.control.XprvKeystoreImportPane;
 import com.sparrowwallet.sparrow.io.*;
 import javafx.fxml.FXML;
 import javafx.scene.control.Accordion;
@@ -15,7 +12,7 @@ public class SwController extends KeystoreImportDetailController {
     private Accordion importAccordion;
 
     public void initializeView() {
-        List<KeystoreImport> importers = List.of(new Bip39(), new Electrum(), new Bip32());
+        List<KeystoreImport> importers = List.of(new Bip39(), new Bip32(), new Slip39());
 
         for(KeystoreImport importer : importers) {
             if(importer.isDeprecated() && !Config.get().isShowDeprecatedImportExport()) {
@@ -30,6 +27,8 @@ public class SwController extends KeystoreImportDetailController {
                 importPane = new MnemonicKeystoreImportPane(getMasterController().getWallet(), (KeystoreMnemonicImport)importer, getMasterController().getDefaultDerivation());
             } else if(importer instanceof KeystoreXprvImport) {
                 importPane = new XprvKeystoreImportPane(getMasterController().getWallet(), (KeystoreXprvImport)importer, getMasterController().getDefaultDerivation());
+            } else if(importer instanceof KeystoreMnemonicShareImport) {
+                importPane = new MnemonicShareKeystoreImportPane(getMasterController().getWallet(), (KeystoreMnemonicShareImport)importer, getMasterController().getDefaultDerivation());
             } else {
                 throw new IllegalArgumentException("Could not create ImportPane for importer of type " + importer.getClass());
             }