wallet load, revert and save

build.gradle

@@ -29,6 +29,7 @@ dependencies {
         exclude group: 'junit'
     }
     implementation('com.google.guava:guava:28.2-jre')
+    implementation('com.google.code.gson:gson:2.8.6')
     implementation('org.fxmisc.richtext:richtextfx:0.10.4')
     implementation('no.tornado:tornadofx-controls:1.0.4')
     implementation('org.controlsfx:controlsfx:11.0.1' ) {

drongo

@@ -1 +1 @@
-Subproject commit 97cdd6217317d4f1a2238ca7d2c8161cb8534e10
+Subproject commit 813781902b8914fbac20c5a36ef230a44639ecbc

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

@@ -4,6 +4,8 @@ import com.google.common.base.Charsets;
 import com.google.common.eventbus.Subscribe;
 import com.google.common.io.ByteSource;
 import com.sparrowwallet.drongo.Utils;
+import com.sparrowwallet.drongo.policy.PolicyType;
+import com.sparrowwallet.drongo.protocol.ScriptType;
 import com.sparrowwallet.drongo.protocol.Transaction;
 import com.sparrowwallet.drongo.psbt.PSBT;
 import com.sparrowwallet.drongo.psbt.PSBTParseException;
@@ -12,9 +14,12 @@ import com.sparrowwallet.sparrow.control.TextAreaDialog;
 import com.sparrowwallet.sparrow.event.TabEvent;
 import com.sparrowwallet.sparrow.event.TransactionTabChangedEvent;
 import com.sparrowwallet.sparrow.event.TransactionTabSelectedEvent;
+import com.sparrowwallet.sparrow.storage.Storage;
 import com.sparrowwallet.sparrow.transaction.TransactionController;
 import com.sparrowwallet.sparrow.wallet.WalletController;
 import com.sparrowwallet.sparrow.wallet.WalletForm;
+import javafx.beans.binding.Bindings;
+import javafx.beans.binding.BooleanBinding;
 import javafx.event.ActionEvent;
 import javafx.fxml.FXML;
 import javafx.fxml.FXMLLoader;
@@ -25,6 +30,10 @@ import javafx.scene.input.TransferMode;
 import javafx.scene.layout.StackPane;
 import javafx.stage.FileChooser;
 import javafx.stage.Stage;
+import org.controlsfx.validation.ValidationResult;
+import org.controlsfx.validation.ValidationSupport;
+import org.controlsfx.validation.Validator;
+import org.controlsfx.validation.decoration.StyleClassValidationDecoration;
 
 import java.io.*;
 import java.net.URL;
@@ -92,7 +101,7 @@ public class AppController implements Initializable {
         showTxHex.setSelected(true);
         showTxHexProperty = true;
 
-        addWalletTab(null, new Wallet());
+        //addWalletTab("newWallet", new Wallet(PolicyType.SINGLE, ScriptType.P2WPKH));
     }
 
     public void openFromFile(ActionEvent event) {
@@ -179,7 +188,7 @@ public class AppController implements Initializable {
         }
     }
 
-    private void showErrorDialog(String title, String content) {
+    public static void showErrorDialog(String title, String content) {
         Alert alert = new Alert(Alert.AlertType.ERROR);
         alert.setTitle(title);
         alert.setHeaderText(title);
@@ -198,18 +207,53 @@ public class AppController implements Initializable {
     }
 
     public void newWallet(ActionEvent event) {
-        Tab tab = addWalletTab(null, new Wallet());
+        TextInputDialog dlg = new TextInputDialog("");
+        dlg.setTitle("New Wallet");
+        dlg.getDialogPane().setContentText("Wallet name:");
+        dlg.getDialogPane().getStylesheets().add(getClass().getResource("general.css").toExternalForm());
+
+        ValidationSupport validationSupport = new ValidationSupport();
+        validationSupport.registerValidator(dlg.getEditor(), Validator.combine(
+                Validator.createEmptyValidator("Wallet name is required"),
+                (Control c, String newValue) -> ValidationResult.fromErrorIf( c, "Wallet name is not unique", Storage.getStorage().getWalletFile(newValue).exists())
+        ));
+        validationSupport.setValidationDecorator(new StyleClassValidationDecoration());
+
+        Button okButton = (Button)dlg.getDialogPane().lookupButton(ButtonType.OK);
+        BooleanBinding isInvalid = Bindings.createBooleanBinding(() ->
+                dlg.getEditor().getText().length() == 0 || Storage.getStorage().getWalletFile(dlg.getEditor().getText()).exists(), dlg.getEditor().textProperty());
+        okButton.disableProperty().bind(isInvalid);
+
+        Optional<String> walletName = dlg.showAndWait();
+        if(walletName.isPresent()) {
+            File walletFile = Storage.getStorage().getWalletFile(walletName.get());
+            Wallet wallet = new Wallet(PolicyType.SINGLE, ScriptType.P2WPKH);
+            Tab tab = addWalletTab(walletFile, wallet);
             tabs.getSelectionModel().select(tab);
         }
-
-    public Tab addWalletTab(String name, Wallet wallet) {
-        try {
-            String tabName = name;
-            if(tabName == null || tabName.isEmpty()) {
-                tabName = "New wallet";
     }
 
-            Tab tab = new Tab(tabName);
+    public void openWallet(ActionEvent event) {
+        Stage window = new Stage();
+        FileChooser fileChooser = new FileChooser();
+        fileChooser.setTitle("Open Wallet");
+        fileChooser.setInitialDirectory(Storage.getStorage().getWalletsDir());
+
+        File file = fileChooser.showOpenDialog(window);
+        if(file != null) {
+            try {
+                Wallet wallet = Storage.getStorage().loadWallet(file);
+                Tab tab = addWalletTab(file, wallet);
+                tabs.getSelectionModel().select(tab);
+            } catch (IOException e) {
+                showErrorDialog("Error opening wallet", e.getMessage());
+            }
+        }
+    }
+
+    public Tab addWalletTab(File walletFile, Wallet wallet) {
+        try {
+            Tab tab = new Tab(walletFile.getName());
             TabData tabData = new TabData(TabData.TabType.WALLET);
             tab.setUserData(tabData);
             tab.setContextMenu(getTabContextMenu(tab));
@@ -217,7 +261,7 @@ public class AppController implements Initializable {
             FXMLLoader walletLoader = new FXMLLoader(getClass().getResource("wallet/wallet.fxml"));
             tab.setContent(walletLoader.load());
             WalletController controller = walletLoader.getController();
-            WalletForm walletForm = new WalletForm(wallet);
+            WalletForm walletForm = new WalletForm(walletFile, wallet);
             controller.setWalletForm(walletForm);
 
             tabs.getTabs().add(tab);

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

@@ -0,0 +1,15 @@
+package com.sparrowwallet.sparrow.event;
+
+import com.sparrowwallet.drongo.wallet.Wallet;
+
+public class SettingsChangedEvent {
+    private Wallet wallet;
+
+    public SettingsChangedEvent(Wallet wallet) {
+        this.wallet = wallet;
+    }
+
+    public Wallet getWallet() {
+        return wallet;
+    }
+}

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

@@ -0,0 +1,81 @@
+package com.sparrowwallet.sparrow.storage;
+
+import com.google.gson.*;
+import com.sparrowwallet.drongo.ExtendedPublicKey;
+import com.sparrowwallet.drongo.wallet.Wallet;
+
+import java.io.*;
+import java.lang.reflect.Type;
+
+public class Storage {
+    public static final String SPARROW_DIR = ".sparrow";
+    public static final String WALLETS_DIR = "wallets";
+
+    private static Storage SINGLETON;
+
+    private final Gson gson;
+
+    private Storage() {
+        GsonBuilder gsonBuilder = new GsonBuilder();
+        gsonBuilder.registerTypeAdapter(ExtendedPublicKey.class, new ExtendedPublicKeySerializer());
+        gsonBuilder.registerTypeAdapter(ExtendedPublicKey.class, new ExtendedPublicKeyDeserializer());
+        gson = gsonBuilder.setPrettyPrinting().create();
+    }
+
+    public static Storage getStorage() {
+        if(SINGLETON == null) {
+            SINGLETON = new Storage();
+        }
+
+        return SINGLETON;
+    }
+
+    public Wallet loadWallet(File file) throws IOException {
+        Reader reader = new FileReader(file);
+        Wallet wallet = gson.fromJson(reader, Wallet.class);
+        reader.close();
+
+        return wallet;
+    }
+
+    public void storeWallet(File file, Wallet wallet) throws IOException {
+        File parent = file.getParentFile();
+        if(!parent.exists() && !parent.mkdirs()) {
+            throw new IOException("Could not create folder " + parent);
+        }
+
+        Writer writer = new FileWriter(file);
+        gson.toJson(wallet, writer);
+        writer.close();
+    }
+
+    public File getWalletFile(String walletName) {
+        return new File(getWalletsDir(), walletName);
+    }
+
+    public File getWalletsDir() {
+        return new File(getSparrowDir(), WALLETS_DIR);
+    }
+
+    private File getSparrowDir() {
+        return new File(getHomeDir(), SPARROW_DIR);
+    }
+
+    private File getHomeDir() {
+        return new File(System.getProperty("user.home"));
+    }
+
+    private static class ExtendedPublicKeySerializer implements JsonSerializer<ExtendedPublicKey> {
+        @Override
+        public JsonElement serialize(ExtendedPublicKey src, Type typeOfSrc, JsonSerializationContext context) {
+            return new JsonPrimitive(src.toString());
+        }
+    }
+
+    private static class ExtendedPublicKeyDeserializer implements JsonDeserializer<ExtendedPublicKey> {
+        @Override
+        public ExtendedPublicKey deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {
+            return ExtendedPublicKey.fromDescriptor(json.getAsJsonPrimitive().getAsString());
+        }
+    }
+}

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

@@ -4,9 +4,9 @@ import com.sparrowwallet.drongo.ExtendedPublicKey;
 import com.sparrowwallet.drongo.KeyDerivation;
 import com.sparrowwallet.drongo.Utils;
 import com.sparrowwallet.drongo.wallet.Keystore;
+import com.sparrowwallet.sparrow.EventManager;
+import com.sparrowwallet.sparrow.event.SettingsChangedEvent;
 import javafx.application.Platform;
-import javafx.beans.value.ChangeListener;
-import javafx.beans.value.ObservableValue;
 import javafx.fxml.FXML;
 import javafx.fxml.Initializable;
 import javafx.scene.control.Control;
@@ -36,7 +36,7 @@ public class KeystoreController extends WalletFormController implements Initiali
     @FXML
     private TextField fingerprint;
 
-    private ValidationSupport validationSupport;
+    private ValidationSupport validationSupport = new ValidationSupport();
 
     @Override
     public void initialize(URL location, ResourceBundle resources) {
@@ -61,21 +61,41 @@ public class KeystoreController extends WalletFormController implements Initiali
         if(keystore.getKeyDerivation() != null) {
             derivation.setText(keystore.getKeyDerivation().getDerivationPath());
             fingerprint.setText(keystore.getKeyDerivation().getMasterFingerprint());
+        } else {
+            keystore.setKeyDerivation(new KeyDerivation("",""));
         }
 
-        label.textProperty().addListener((observable, oldValue, newValue) -> keystore.setLabel(newValue));
+        label.textProperty().addListener((observable, oldValue, newValue) -> {
-        fingerprint.textProperty().addListener((observable, oldValue, newValue) -> keystore.setKeyDerivation(new KeyDerivation(newValue, keystore.getKeyDerivation().getDerivationPath())));
+            keystore.setLabel(newValue);
-        derivation.textProperty().addListener((observable, oldValue, newValue) -> keystore.setKeyDerivation(new KeyDerivation(keystore.getKeyDerivation().getMasterFingerprint(), newValue)));
+            EventManager.get().post(new SettingsChangedEvent(walletForm.getWallet()));
-        xpub.textProperty().addListener((observable, oldValue, newValue) -> keystore.setExtendedPublicKey(ExtendedPublicKey.fromDescriptor(newValue)));
+        });
+        fingerprint.textProperty().addListener((observable, oldValue, newValue) -> {
+            keystore.setKeyDerivation(new KeyDerivation(newValue, keystore.getKeyDerivation().getDerivationPath()));
+            EventManager.get().post(new SettingsChangedEvent(walletForm.getWallet()));
+        });
+        derivation.textProperty().addListener((observable, oldValue, newValue) -> {
+            if(KeyDerivation.isValid(newValue)) {
+                keystore.setKeyDerivation(new KeyDerivation(keystore.getKeyDerivation().getMasterFingerprint(), newValue));
+                EventManager.get().post(new SettingsChangedEvent(walletForm.getWallet()));
+            }
+        });
+        xpub.textProperty().addListener((observable, oldValue, newValue) -> {
+            if(ExtendedPublicKey.isValid(newValue)) {
+                keystore.setExtendedPublicKey(ExtendedPublicKey.fromDescriptor(newValue));
+                EventManager.get().post(new SettingsChangedEvent(walletForm.getWallet()));
+            }
+        });
     }
 
     public TextField getLabel() {
         return label;
     }
 
-    private void setupValidation() {
+    public ValidationSupport getValidationSupport() {
-        validationSupport = new ValidationSupport();
+        return validationSupport;
+    }
 
+    private void setupValidation() {
         validationSupport.registerValidator(label, Validator.combine(
                 Validator.createEmptyValidator("Label is required"),
                 (Control c, String newValue) -> ValidationResult.fromErrorIf( c, "Label is not unique", walletForm.getWallet().getKeystores().stream().filter(k -> k != keystore).map(Keystore::getLabel).collect(Collectors.toList()).contains(newValue)),

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

@@ -9,7 +9,9 @@ import com.sparrowwallet.drongo.wallet.Wallet;
 import com.sparrowwallet.sparrow.AppController;
 import com.sparrowwallet.sparrow.EventManager;
 import com.sparrowwallet.sparrow.control.CopyableLabel;
+import com.sparrowwallet.sparrow.event.SettingsChangedEvent;
 import com.sparrowwallet.sparrow.event.WalletChangedEvent;
+import javafx.application.Platform;
 import javafx.beans.property.SimpleIntegerProperty;
 import javafx.collections.FXCollections;
 import javafx.fxml.FXML;
@@ -54,6 +56,12 @@ public class SettingsController extends WalletFormController implements Initiali
 
     private TabPane keystoreTabs;
 
+    @FXML
+    private Button apply;
+
+    @FXML
+    private Button revert;
+
     private final SimpleIntegerProperty totalKeystores = new SimpleIntegerProperty(0);
 
     @Override
@@ -63,15 +71,17 @@ public class SettingsController extends WalletFormController implements Initiali
 
     @Override
     public void initializeView() {
-        Wallet wallet = walletForm.getWallet();
-
         keystoreTabs = new TabPane();
         keystoreTabsPane.getChildren().add(Borders.wrap(keystoreTabs).etchedBorder().outerPadding(10, 5, 0 ,0).innerPadding(0).raised().buildAll());
 
         policyType.getSelectionModel().selectedItemProperty().addListener((observable, oldValue, policyType) -> {
-            wallet.setPolicyType(policyType);
+            walletForm.getWallet().setPolicyType(policyType);
+
             scriptType.setItems(FXCollections.observableArrayList(ScriptType.getScriptTypesForPolicyType(policyType)));
+            if(!ScriptType.getScriptTypesForPolicyType(policyType).contains(walletForm.getWallet().getScriptType())) {
                 scriptType.getSelectionModel().select(policyType.getDefaultScriptType());
+            }
+
             multisigFieldset.setVisible(policyType.equals(PolicyType.MULTI));
             if(policyType.equals(PolicyType.MULTI)) {
                 totalKeystores.bind(multisigControl.highValueProperty());
@@ -82,51 +92,74 @@ public class SettingsController extends WalletFormController implements Initiali
         });
 
         scriptType.getSelectionModel().selectedItemProperty().addListener((observable, oldValue, scriptType) -> {
-            int threshold = wallet.getPolicyType().equals(PolicyType.MULTI) ? (int)multisigControl.lowValueProperty().get() : 1;
+            if(scriptType != null) {
-            wallet.setDefaultPolicy(Policy.getPolicy(wallet.getPolicyType(), scriptType, wallet.getKeystores(), threshold));
+                walletForm.getWallet().setScriptType(scriptType);
-            EventManager.get().post(new WalletChangedEvent(wallet));
+            }
+
+            EventManager.get().post(new SettingsChangedEvent(walletForm.getWallet()));
         });
 
         multisigLowLabel.textProperty().bind(multisigControl.lowValueProperty().asString("%.0f") );
         multisigHighLabel.textProperty().bind(multisigControl.highValueProperty().asString("%.0f"));
 
         multisigControl.lowValueProperty().addListener((observable, oldValue, threshold) -> {
-            wallet.setDefaultPolicy(Policy.getPolicy(wallet.getPolicyType(), wallet.getScriptType(), wallet.getKeystores(), threshold.intValue()));
+            EventManager.get().post(new SettingsChangedEvent(walletForm.getWallet()));
-            EventManager.get().post(new WalletChangedEvent(wallet));
         });
 
         multisigFieldset.managedProperty().bind(multisigFieldset.visibleProperty());
 
         totalKeystores.addListener((observable, oldValue, numCosigners) -> {
-            int keystoreCount = wallet.getKeystores().size();
+            int keystoreCount = walletForm.getWallet().getKeystores().size();
-            int keystoreNameCount = keystoreCount;
+            int keystoreNameCount = keystoreCount + 1;
             while(keystoreCount < numCosigners.intValue()) {
                 keystoreCount++;
                 String name = "Keystore " + keystoreNameCount;
-                while(wallet.getKeystores().stream().map(Keystore::getLabel).collect(Collectors.toList()).contains(name)) {
+                while(walletForm.getWallet().getKeystores().stream().map(Keystore::getLabel).collect(Collectors.toList()).contains(name)) {
                     name = "Keystore " + (++keystoreNameCount);
                 }
-                wallet.getKeystores().add(new Keystore(name));
+                walletForm.getWallet().getKeystores().add(new Keystore(name));
             }
-            wallet.setKeystores(wallet.getKeystores().subList(0, numCosigners.intValue()));
+            walletForm.getWallet().setKeystores(walletForm.getWallet().getKeystores().subList(0, numCosigners.intValue()));
 
-            for(int i = 0; i < wallet.getKeystores().size(); i++) {
+            for(int i = 0; i < walletForm.getWallet().getKeystores().size(); i++) {
-                Keystore keystore = wallet.getKeystores().get(i);
+                Keystore keystore = walletForm.getWallet().getKeystores().get(i);
                 if(keystoreTabs.getTabs().size() == i) {
-                    Tab tab = getKeystoreTab(wallet, keystore);
+                    Tab tab = getKeystoreTab(walletForm.getWallet(), keystore);
                     keystoreTabs.getTabs().add(tab);
                 }
             }
-            while(keystoreTabs.getTabs().size() > wallet.getKeystores().size()) {
+            while(keystoreTabs.getTabs().size() > walletForm.getWallet().getKeystores().size()) {
                 keystoreTabs.getTabs().remove(keystoreTabs.getTabs().size() - 1);
             }
 
-            if(wallet.getPolicyType().equals(PolicyType.MULTI)) {
+            if(walletForm.getWallet().getPolicyType().equals(PolicyType.MULTI)) {
-                wallet.setDefaultPolicy(Policy.getPolicy(wallet.getPolicyType(), wallet.getScriptType(), wallet.getKeystores(), wallet.getDefaultPolicy().getNumSignaturesRequired()));
+                EventManager.get().post(new SettingsChangedEvent(walletForm.getWallet()));
-                EventManager.get().post(new WalletChangedEvent(wallet));
             }
         });
 
+        revert.setOnAction(event -> {
+            keystoreTabs.getTabs().removeAll(keystoreTabs.getTabs());
+            totalKeystores.unbind();
+            totalKeystores.setValue(0);
+            walletForm.revert();
+            setFieldsFromWallet(walletForm.getWallet());
+        });
+
+        apply.setOnAction(event -> {
+            try {
+                walletForm.save();
+                revert.setDisable(true);
+                apply.setDisable(true);
+                EventManager.get().post(new WalletChangedEvent(walletForm.getWallet()));
+            } catch (IOException e) {
+                AppController.showErrorDialog("Error saving file", e.getMessage());
+            }
+        });
+
+        setFieldsFromWallet(walletForm.getWallet());
+    }
+
+    private void setFieldsFromWallet(Wallet wallet) {
         if(wallet.getPolicyType() == null) {
             wallet.setPolicyType(PolicyType.SINGLE);
             wallet.setScriptType(ScriptType.P2WPKH);
@@ -135,20 +168,23 @@ public class SettingsController extends WalletFormController implements Initiali
         }
 
         if(wallet.getPolicyType().equals(PolicyType.SINGLE)) {
-            totalKeystores.setValue(wallet.getKeystores().size());
+            totalKeystores.setValue(1);
         } else if(wallet.getPolicyType().equals(PolicyType.MULTI)) {
+            multisigControl.lowValueProperty().set(wallet.getDefaultPolicy().getNumSignaturesRequired());
             multisigControl.highValueProperty().set(wallet.getKeystores().size());
+            totalKeystores.bind(multisigControl.highValueProperty());
         }
 
         if(wallet.getPolicyType() != null) {
             policyType.getSelectionModel().select(walletForm.getWallet().getPolicyType());
-        } else {
-            policyType.getSelectionModel().select(0);
         }
 
         if(wallet.getScriptType() != null) {
             scriptType.getSelectionModel().select(walletForm.getWallet().getScriptType());
         }
+
+        revert.setDisable(true);
+        apply.setDisable(true);
     }
 
     private Tab getKeystoreTab(Wallet wallet, Keystore keystore) {
@@ -162,14 +198,47 @@ public class SettingsController extends WalletFormController implements Initiali
             controller.setKeystore(getWalletForm(), keystore);
             tab.textProperty().bind(controller.getLabel().textProperty());
 
+            controller.getValidationSupport().validationResultProperty().addListener((o, oldValue, result) -> {
+                if(result.getErrors().isEmpty()) {
+                    tab.getStyleClass().remove("tab-error");
+                    tab.setTooltip(null);
+                    apply.setDisable(false);
+                } else {
+                    if(!tab.getStyleClass().contains("tab-error")) {
+                        tab.getStyleClass().add("tab-error");
+                    }
+                    tab.setTooltip(new Tooltip(result.getErrors().iterator().next().getText()));
+                    apply.setDisable(true);
+                }
+            });
+
             return tab;
         } catch (IOException e) {
             throw new RuntimeException(e);
         }
     }
 
+    private boolean tabsValidate() {
+        for(Tab tab : keystoreTabs.getTabs()) {
+            if(tab.getStyleClass().contains("tab-error")) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
     @Subscribe
-    public void updateMiniscript(WalletChangedEvent event) {
+    public void update(SettingsChangedEvent event) {
+        Wallet wallet = event.getWallet();
+        if(wallet.getPolicyType() == PolicyType.SINGLE) {
+            wallet.setDefaultPolicy(Policy.getPolicy(wallet.getPolicyType(), wallet.getScriptType(), wallet.getKeystores(), 1));
+        } else if(wallet.getPolicyType() == PolicyType.MULTI) {
+            wallet.setDefaultPolicy(Policy.getPolicy(wallet.getPolicyType(), wallet.getScriptType(), wallet.getKeystores(), (int)multisigControl.getLowValue()));
+        }
+
         spendingMiniscript.setText(event.getWallet().getDefaultPolicy().getMiniscript().getScript());
+        revert.setDisable(false);
+        Platform.runLater(() -> apply.setDisable(!tabsValidate()));
     }
 }

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

@@ -1,19 +1,32 @@
 package com.sparrowwallet.sparrow.wallet;
 
 import com.sparrowwallet.drongo.wallet.Wallet;
+import com.sparrowwallet.sparrow.storage.Storage;
+
+import java.io.File;
+import java.io.IOException;
 
 public class WalletForm {
+    private File walletFile;
+    private Wallet oldWallet;
     private Wallet wallet;
 
-    public WalletForm(Wallet wallet) {
+    public WalletForm(File walletFile, Wallet currentWallet) {
-        this.wallet = wallet;
+        this.walletFile = walletFile;
+        this.oldWallet = currentWallet;
+        this.wallet = currentWallet.copy();
     }
 
     public Wallet getWallet() {
         return wallet;
     }
 
-    public void setWallet(Wallet wallet) {
+    public void revert() {
-        this.wallet = wallet;
+        this.wallet = oldWallet.copy();
+    }
+
+    public void save() throws IOException {
+        Storage.getStorage().storeWallet(walletFile, wallet);
+        oldWallet = wallet.copy();
     }
 }

src/main/java/module-info.java

@@ -8,5 +8,6 @@ open module com.sparrowwallet.sparrow {
     requires com.sparrowwallet.drongo;
     requires com.google.common;
     requires flowless;
+    requires com.google.gson;
     requires javafx.swing;
 }

src/main/resources/com/sparrowwallet/sparrow/app.fxml

@@ -13,7 +13,8 @@
                 <Menu mnemonicParsing="false" text="File">
                     <items>
                         <MenuItem mnemonicParsing="false" text="New Wallet" onAction="#newWallet"/>
-                        <Menu mnemonicParsing="false" text="Open">
+                        <MenuItem mnemonicParsing="false" text="Open Wallet" onAction="#openWallet"/>
+                        <Menu mnemonicParsing="false" text="Open Transaction">
                             <items>
                                 <MenuItem text="File..." onAction="#openFromFile"/>
                                 <MenuItem text="From Text..." onAction="#openFromText"/>

src/main/resources/com/sparrowwallet/sparrow/general.css

@@ -34,8 +34,12 @@
     -fx-translate-x: -20px;
 }
 
+.tab-error > .tab-container {
+    -fx-effect: dropshadow(three-pass-box, rgba(202, 18, 67, .6), 7, 0, 0, 0);
+}
+
 .error {
-    -fx-effect: dropshadow(three-pass-box, darkred, 7, 0, 0, 0);
+    -fx-effect: dropshadow(three-pass-box, rgb(202, 18, 67), 7, 0, 0, 0);
 }
 
 .warning {

src/main/resources/com/sparrowwallet/sparrow/wallet/keystore.fxml

@@ -16,7 +16,7 @@
     </padding>
     <Form GridPane.columnIndex="0" GridPane.rowIndex="0">
         <Fieldset inputGrow="SOMETIMES" text="">
-            <Field text="Name:">
+            <Field text="Label:">
                 <TextField fx:id="label" maxWidth="160"/>
             </Field>
             <Field text="Master fingerprint:">

src/main/resources/com/sparrowwallet/sparrow/wallet/settings.fxml

@@ -10,7 +10,9 @@
 <?import com.sparrowwallet.drongo.policy.PolicyType?>
 <?import com.sparrowwallet.drongo.protocol.ScriptType?>
 
-<GridPane hgap="10.0" vgap="10.0" stylesheets="@settings.css, @../general.css" xmlns="http://javafx.com/javafx/10.0.2-internal" xmlns:fx="http://javafx.com/fxml/1" fx:controller="com.sparrowwallet.sparrow.wallet.SettingsController">
+<BorderPane stylesheets="@settings.css, @../general.css" xmlns="http://javafx.com/javafx/10.0.2-internal" xmlns:fx="http://javafx.com/fxml/1" fx:controller="com.sparrowwallet.sparrow.wallet.SettingsController">
+    <center>
+        <GridPane hgap="10.0" vgap="10.0">
             <padding>
                 <Insets left="25.0" right="25.0" top="25.0" />
             </padding>
@@ -80,4 +82,15 @@
                     <StackPane fx:id="keystoreTabsPane"  />
                 </Fieldset>
             </Form>
-</GridPane>
+        </GridPane>
+    </center>
+    <bottom>
+        <AnchorPane>
+            <padding>
+                <Insets left="25.0" right="25.0" bottom="25.0" />
+            </padding>
+            <Button fx:id="apply" text="Apply" defaultButton="true" AnchorPane.rightAnchor="10" />
+            <Button fx:id="revert" text="Revert" cancelButton="true" AnchorPane.rightAnchor="80" />
+        </AnchorPane>
+    </bottom>
+</BorderPane>