add ability to import keystores and wallets with QR, add part protocol to QR scanner

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

@@ -559,17 +559,14 @@ public class AppController implements Initializable {
             if(result.transaction != null) {
                 Tab tab = addTransactionTab(null, result.transaction);
                 tabs.getSelectionModel().select(tab);
-            }
-            if(result.psbt != null) {
+            } else if(result.psbt != null) {
                 Tab tab = addTransactionTab(null, result.psbt);
                 tabs.getSelectionModel().select(tab);
-            }
-            if(result.error != null) {
-                showErrorDialog("Invalid QR Code", result.error);
-            }
-            if(result.exception != null) {
+            } else if(result.exception != null) {
                 log.error("Error opening webcam", result.exception);
                 showErrorDialog("Error opening webcam", result.exception.getMessage());
+            } else {
+                AppController.showErrorDialog("Invalid QR Code", "Cannot parse QR code into a transaction or PSBT");
             }
         }
     }

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

@@ -2,6 +2,7 @@ package com.sparrowwallet.sparrow.control;
 
 import com.google.gson.JsonParseException;
 import com.sparrowwallet.drongo.crypto.InvalidPasswordException;
+import com.sparrowwallet.sparrow.glyphfont.FontAwesome5;
 import com.sparrowwallet.sparrow.io.FileImport;
 import com.sparrowwallet.sparrow.io.ImportException;
 import javafx.beans.property.SimpleStringProperty;
@@ -9,41 +10,72 @@ import javafx.geometry.Insets;
 import javafx.geometry.Pos;
 import javafx.scene.Node;
 import javafx.scene.control.Button;
+import javafx.scene.control.ButtonBase;
 import javafx.scene.control.Control;
+import javafx.scene.control.ToggleButton;
 import javafx.scene.layout.HBox;
 import javafx.scene.layout.Priority;
 import javafx.stage.FileChooser;
 import javafx.stage.Stage;
+import org.controlsfx.control.SegmentedButton;
 import org.controlsfx.control.textfield.CustomPasswordField;
 import org.controlsfx.control.textfield.TextFields;
+import org.controlsfx.glyphfont.Glyph;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import java.io.BufferedInputStream;
-import java.io.File;
-import java.io.FileInputStream;
-import java.io.InputStream;
+import java.io.*;
+import java.nio.charset.StandardCharsets;
+import java.util.Optional;
 
 public abstract class FileImportPane extends TitledDescriptionPane {
     private static final Logger log = LoggerFactory.getLogger(FileImportPane.class);
 
     private final FileImport importer;
-    protected Button importButton;
+    protected ButtonBase importButton;
     private final SimpleStringProperty password = new SimpleStringProperty("");
+    private final boolean scannable;
 
-    public FileImportPane(FileImport importer, String title, String description, String content, String imageUrl) {
+    public FileImportPane(FileImport importer, String title, String description, String content, String imageUrl, boolean scannable) {
         super(title, description, content, imageUrl);
         this.importer = importer;
+        this.scannable = scannable;
+
+        buttonBox.getChildren().clear();
+        buttonBox.getChildren().add(createButton());
     }
 
     @Override
     protected Control createButton() {
-        importButton = new Button("Import File...");
-        importButton.setAlignment(Pos.CENTER_RIGHT);
-        importButton.setOnAction(event -> {
-            importFile();
-        });
-        return importButton;
+        if(scannable) {
+            ToggleButton scanButton = new ToggleButton("Scan...");
+            Glyph cameraGlyph = new Glyph(FontAwesome5.FONT_NAME, FontAwesome5.Glyph.CAMERA);
+            cameraGlyph.setFontSize(12);
+            scanButton.setGraphic(cameraGlyph);
+            scanButton.setOnAction(event -> {
+                scanButton.setSelected(false);
+                importQR();
+            });
+
+            ToggleButton fileButton = new ToggleButton("Import File...");
+            fileButton.setAlignment(Pos.CENTER_RIGHT);
+            fileButton.setOnAction(event -> {
+                fileButton.setSelected(false);
+                importFile();
+            });
+            importButton = fileButton;
+
+            SegmentedButton segmentedButton = new SegmentedButton();
+            segmentedButton.getButtons().addAll(scanButton, fileButton);
+            return segmentedButton;
+        } else {
+            importButton = new Button("Import File...");
+            importButton.setAlignment(Pos.CENTER_RIGHT);
+            importButton.setOnAction(event -> {
+                importFile();
+            });
+            return importButton;
+        }
     }
 
     private void importFile() {
@@ -94,6 +126,29 @@ public abstract class FileImportPane extends TitledDescriptionPane {
         }
     }
 
+    private void importQR() {
+        QRScanDialog qrScanDialog = new QRScanDialog();
+        Optional<QRScanDialog.Result> optionalResult = qrScanDialog.showAndWait();
+        if(optionalResult.isPresent()) {
+            QRScanDialog.Result result = optionalResult.get();
+            if(result.payload != null) {
+                try {
+                    importFile(importer.getName(), new ByteArrayInputStream(result.payload.getBytes(StandardCharsets.UTF_8)), null);
+                } catch(Exception e) {
+                    log.error("Error importing QR", e);
+                    String errorMessage = e.getMessage();
+                    if(e.getCause() != null && e.getCause().getMessage() != null && !e.getCause().getMessage().isEmpty()) {
+                        errorMessage = e.getCause().getMessage();
+                    }
+                    if(e instanceof JsonParseException || e.getCause() instanceof JsonParseException) {
+                        errorMessage = "QR contents were not in JSON format";
+                    }
+                    setError("Import Error", errorMessage);
+                }
+            }
+        }
+    }
+
     protected abstract void importFile(String fileName, InputStream inputStream, String password) throws ImportException;
 
     private Node getPasswordEntry(File file) {

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

@@ -14,7 +14,7 @@ public class FileKeystoreImportPane extends FileImportPane {
     private final KeystoreFileImport importer;
 
     public FileKeystoreImportPane(Wallet wallet, KeystoreFileImport importer) {
-        super(importer, importer.getName(), "Keystore file import", importer.getKeystoreImportDescription(), "image/" + importer.getWalletModel().getType() + ".png");
+        super(importer, importer.getName(), "Keystore import", importer.getKeystoreImportDescription(), "image/" + importer.getWalletModel().getType() + ".png", importer.isScannable());
         this.wallet = wallet;
         this.importer = importer;
     }

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

@@ -12,7 +12,7 @@ public class FileWalletImportPane extends FileImportPane {
     private final WalletImport importer;
 
     public FileWalletImportPane(WalletImport importer) {
-        super(importer, importer.getName(), "Wallet file import", importer.getWalletImportDescription(), "image/" + importer.getWalletModel().getType() + ".png");
+        super(importer, importer.getName(), "Wallet import", importer.getWalletImportDescription(), "image/" + importer.getWalletModel().getType() + ".png", importer.isScannable());
         this.importer = importer;
     }
 

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

@@ -36,7 +36,7 @@ public class FileWalletKeystoreImportPane extends FileImportPane {
     private byte[] fileBytes;
 
     public FileWalletKeystoreImportPane(KeystoreFileImport importer) {
-        super(importer, importer.getName(), "Wallet file import", importer.getKeystoreImportDescription(), "image/" + importer.getWalletModel().getType() + ".png");
+        super(importer, importer.getName(), "Wallet import", importer.getKeystoreImportDescription(), "image/" + importer.getWalletModel().getType() + ".png", importer.isScannable());
         this.importer = importer;
     }
 

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

@@ -22,13 +22,23 @@ import javafx.scene.control.DialogPane;
 import javafx.scene.layout.StackPane;
 import org.controlsfx.tools.Borders;
 
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Objects;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+import java.util.stream.IntStream;
+
 public class QRScanDialog extends Dialog<QRScanDialog.Result> {
     private final URDecoder decoder;
     private final WebcamService webcamService;
+    private List<String> parts;
 
     private boolean isUr;
     private QRScanDialog.Result result;
 
+    private static final Pattern PART_PATTERN = Pattern.compile("p(\\d+)of(\\d+) (.+)");
+
     public QRScanDialog() {
         this.decoder = new URDecoder();
 
@@ -69,6 +79,8 @@ public class QRScanDialog extends Dialog<QRScanDialog.Result> {
 
             //Try text first
             String qrtext = qrResult.getText();
+            Matcher partMatcher = PART_PATTERN.matcher(qrtext);
+
             if(isUr || qrtext.toLowerCase().startsWith(UR.UR_PREFIX)) {
                 isUr = true;
                 decoder.receivePart(qrtext);
@@ -102,6 +114,37 @@ public class QRScanDialog extends Dialog<QRScanDialog.Result> {
                         result = new Result(urResult.error);
                     }
                 }
+            } else if(partMatcher.matches()) {
+                int m = Integer.parseInt(partMatcher.group(1));
+                int n = Integer.parseInt(partMatcher.group(2));
+                String payload = partMatcher.group(3);
+
+                if(parts == null) {
+                    parts = new ArrayList<>(n);
+                    IntStream.range(0, n).forEach(i -> parts.add(null));
+                }
+                parts.set(m - 1, payload);
+
+                if(parts.stream().filter(Objects::nonNull).count() == n) {
+                    String complete = String.join("", parts);
+                    try {
+                        PSBT psbt = PSBT.fromString(complete);
+                        result = new Result(psbt);
+                        return;
+                    } catch(Exception e) {
+                        //ignore, bytes not parsable as PSBT
+                    }
+
+                    try {
+                        Transaction transaction = new Transaction(Utils.hexToBytes(complete));
+                        result = new Result(transaction);
+                        return;
+                    } catch(Exception e) {
+                        //ignore, bytes not parsable as tx
+                    }
+
+                    result = new Result("Parsed QR parts were not a PSBT or transaction");
+                }
             } else {
                 PSBT psbt;
                 Transaction transaction;
@@ -166,7 +209,7 @@ public class QRScanDialog extends Dialog<QRScanDialog.Result> {
 
                 //Try Base43 used by Electrum
                 try {
-                    psbt = new PSBT(Base43.decode(qrResult.getText()));
+                    psbt = new PSBT(Base43.decode(qrtext));
                     result = new Result(psbt);
                     return;
                 } catch(Exception e) {
@@ -174,14 +217,14 @@ public class QRScanDialog extends Dialog<QRScanDialog.Result> {
                 }
 
                 try {
-                    transaction = new Transaction(Base43.decode(qrResult.getText()));
+                    transaction = new Transaction(Base43.decode(qrtext));
                     result = new Result(transaction);
                     return;
                 } catch(Exception e) {
                     //Ignore, not parseable as base43 decoded bytes
                 }
 
-                result = new Result("Cannot parse QR code into a PSBT, transaction or address");
+                result = new Result(qrtext);
             }
         }
     }
@@ -191,7 +234,7 @@ public class QRScanDialog extends Dialog<QRScanDialog.Result> {
         public final PSBT psbt;
         public final BitcoinURI uri;
         public final ExtendedKey extendedKey;
-        public final String error;
+        public final String payload;
         public final Throwable exception;
 
         public Result(Transaction transaction) {
@@ -199,7 +242,7 @@ public class QRScanDialog extends Dialog<QRScanDialog.Result> {
             this.psbt = null;
             this.uri = null;
             this.extendedKey = null;
-            this.error = null;
+            this.payload = null;
             this.exception = null;
         }
 
@@ -208,7 +251,7 @@ public class QRScanDialog extends Dialog<QRScanDialog.Result> {
             this.psbt = psbt;
             this.uri = null;
             this.extendedKey = null;
-            this.error = null;
+            this.payload = null;
             this.exception = null;
         }
 
@@ -217,7 +260,7 @@ public class QRScanDialog extends Dialog<QRScanDialog.Result> {
             this.psbt = null;
             this.uri = uri;
             this.extendedKey = null;
-            this.error = null;
+            this.payload = null;
             this.exception = null;
         }
 
@@ -226,7 +269,7 @@ public class QRScanDialog extends Dialog<QRScanDialog.Result> {
             this.psbt = null;
             this.uri = BitcoinURI.fromAddress(address);
             this.extendedKey = null;
-            this.error = null;
+            this.payload = null;
             this.exception = null;
         }
 
@@ -235,16 +278,16 @@ public class QRScanDialog extends Dialog<QRScanDialog.Result> {
             this.psbt = null;
             this.uri = null;
             this.extendedKey = extendedKey;
-            this.error = null;
+            this.payload = null;
             this.exception = null;
         }
 
-        public Result(String error) {
+        public Result(String payload) {
             this.transaction = null;
             this.psbt = null;
             this.uri = null;
             this.extendedKey = null;
-            this.error = error;
+            this.payload = payload;
             this.exception = null;
         }
 
@@ -253,7 +296,7 @@ public class QRScanDialog extends Dialog<QRScanDialog.Result> {
             this.psbt = null;
             this.uri = null;
             this.extendedKey = null;
-            this.error = null;
+            this.payload = null;
             this.exception = exception;
         }
     }

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

@@ -29,7 +29,7 @@ public class CoboVaultMultisig extends ColdcardMultisig {
 
     @Override
     public String getKeystoreImportDescription() {
-        return "Import file created by using the Multisig Wallet > Show/Export XPUB > Export All > Export feature on your Cobo Vault.";
+        return "Import file or QR created by using the Multisig Wallet > Show/Export XPUB > Export All > Export feature on your Cobo Vault.";
     }
 
     @Override
@@ -45,11 +45,16 @@ public class CoboVaultMultisig extends ColdcardMultisig {
 
     @Override
     public String getWalletImportDescription() {
-        return "Import file created by using the Multisig Wallet > Create Multisig Wallet feature on your Cobo Vault.";
+        return "Import file or QR 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.";
     }
+
+    @Override
+    public boolean isScannable() {
+        return true;
+    }
 }

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

@@ -23,7 +23,7 @@ public class CoboVaultSinglesig implements KeystoreFileImport, WalletImport {
 
     @Override
     public String getKeystoreImportDescription() {
-        return "Import file created by using the Watch-Only Wallet > Generic Wallet > Export Wallet feature on your Cobo Vault.";
+        return "Import file or QR created by using the Watch-Only Wallet > Generic Wallet > Export Wallet feature on your Cobo Vault.";
     }
 
     @Override
@@ -35,7 +35,11 @@ public class CoboVaultSinglesig implements KeystoreFileImport, WalletImport {
     public Keystore getKeystore(ScriptType scriptType, InputStream inputStream, String password) throws ImportException {
         try {
             Gson gson = new Gson();
-            CoboVaultKeystore coboKeystore = gson.fromJson(new InputStreamReader(inputStream), CoboVaultKeystore.class);
+            CoboVaultSinglesigKeystore coboKeystore = gson.fromJson(new InputStreamReader(inputStream), CoboVaultSinglesigKeystore.class);
+
+            if(coboKeystore.MasterFingerprint == null || coboKeystore.AccountKeyPath == null || coboKeystore.ExtPubKey == null) {
+                throw new ImportException("Not a valid " + getName() + " keystore export");
+            }
 
             Keystore keystore = new Keystore();
             keystore.setLabel(getName());
@@ -83,7 +87,12 @@ public class CoboVaultSinglesig implements KeystoreFileImport, WalletImport {
         return false;
     }
 
-    private static class CoboVaultKeystore {
+    @Override
+    public boolean isScannable() {
+        return true;
+    }
+
+    private static class CoboVaultSinglesigKeystore {
         public String ExtPubKey;
         public String MasterFingerprint;
         public String AccountKeyPath;

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

@@ -37,7 +37,14 @@ public class ColdcardMultisig implements WalletImport, KeystoreFileImport, Walle
         keystore.setSource(KeystoreSource.HW_AIRGAPPED);
         keystore.setWalletModel(WalletModel.COLDCARD);
 
-        if(scriptType.equals(ScriptType.P2SH)) {
+        if(cck.xpub != null && cck.path != null) {
+            ExtendedKey.Header header = ExtendedKey.Header.fromExtendedKey(cck.xpub);
+            if(header.getDefaultScriptType() != scriptType) {
+                throw new ImportException("This wallet's script type (" + scriptType + ") does not match the " + getName() + " script type (" + header.getDefaultScriptType() + ")");
+            }
+            keystore.setKeyDerivation(new KeyDerivation(cck.xfp, cck.path));
+            keystore.setExtendedPublicKey(ExtendedKey.fromDescriptor(cck.xpub));
+        } else if(scriptType.equals(ScriptType.P2SH)) {
             keystore.setKeyDerivation(new KeyDerivation(cck.xfp, cck.p2sh_deriv));
             keystore.setExtendedPublicKey(ExtendedKey.fromDescriptor(cck.p2sh));
         } else if(scriptType.equals(ScriptType.P2SH_P2WSH)) {
@@ -60,6 +67,8 @@ public class ColdcardMultisig implements WalletImport, KeystoreFileImport, Walle
         public String p2wsh_p2sh;
         public String p2wsh_deriv;
         public String p2wsh;
+        public String xpub;
+        public String path;
         public String xfp;
     }
 
@@ -200,4 +209,9 @@ public class ColdcardMultisig implements WalletImport, KeystoreFileImport, Walle
     public boolean isEncrypted(File file) {
         return false;
     }
+
+    @Override
+    public boolean isScannable() {
+        return false;
+    }
 }

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

@@ -40,6 +40,11 @@ public class ColdcardSinglesig implements KeystoreFileImport, WalletImport {
         return false;
     }
 
+    @Override
+    public boolean isScannable() {
+        return false;
+    }
+
     @Override
     public Keystore getKeystore(ScriptType scriptType, InputStream inputStream, String password) throws ImportException {
         try {

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

@@ -317,6 +317,11 @@ public class Electrum implements KeystoreFileImport, WalletImport, WalletExport
         return (FileType.BINARY.equals(IOUtils.getFileType(file)));
     }
 
+    @Override
+    public boolean isScannable() {
+        return false;
+    }
+
     @Override
     public String getWalletExportDescription() {
         return "Export this wallet as an Electrum wallet file.";

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

@@ -4,4 +4,5 @@ import java.io.File;
 
 public interface FileImport extends Import {
     boolean isEncrypted(File file);
+    boolean isScannable();
 }

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

@@ -75,6 +75,11 @@ public class Specter implements WalletImport, WalletExport {
         return false;
     }
 
+    @Override
+    public boolean isScannable() {
+        return true;
+    }
+
     @Override
     public String getName() {
         return "Specter";

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

@@ -362,8 +362,6 @@ public class KeystoreController extends WalletFormController implements Initiali
             QRScanDialog.Result result = optionalResult.get();
             if(result.extendedKey != null && result.extendedKey.getKey().isPubKeyOnly()) {
                 xpub.setText(result.extendedKey.getExtendedKey());
-            } else if(result.error != null) {
-                AppController.showErrorDialog("Invalid QR Code", result.error);
             } else if(result.exception != null) {
                 log.error("Error opening webcam", result.exception);
                 AppController.showErrorDialog("Error opening webcam", result.exception.getMessage());