support linking and sending to payment codes without paynym.is

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

@@ -345,7 +345,6 @@ public class AppController implements Initializable {
         showPayNym.setDisable(true);
         findMixingPartner.setDisable(true);
         AppServices.onlineProperty().addListener((observable, oldValue, newValue) -> {
-            showPayNym.setDisable(exportWallet.isDisable() || getSelectedWalletForm() == null || !getSelectedWalletForm().getWallet().hasPaymentCode() || !newValue);
             findMixingPartner.setDisable(exportWallet.isDisable() || getSelectedWalletForm() == null || !SorobanServices.canWalletMix(getSelectedWalletForm().getWallet()) || !newValue);
         });
 
@@ -1989,7 +1988,7 @@ public class AppController implements Initializable {
                 exportWallet.setDisable(walletTabData.getWallet() == null || !walletTabData.getWallet().isValid() || walletTabData.getWalletForm().isLocked());
                 showLoadingLog.setDisable(false);
                 showTxHex.setDisable(true);
-                showPayNym.setDisable(exportWallet.isDisable() || !walletTabData.getWallet().hasPaymentCode() || !AppServices.onlineProperty().get());
+                showPayNym.setDisable(exportWallet.isDisable() || !walletTabData.getWallet().hasPaymentCode());
                 findMixingPartner.setDisable(exportWallet.isDisable() || !SorobanServices.canWalletMix(walletTabData.getWallet()) || !AppServices.onlineProperty().get());
             }
         }
@@ -2015,7 +2014,7 @@ public class AppController implements Initializable {
         if(selectedWalletForm != null) {
             if(selectedWalletForm.getWalletId().equals(event.getWalletId())) {
                 exportWallet.setDisable(!event.getWallet().isValid() || selectedWalletForm.isLocked());
-                showPayNym.setDisable(exportWallet.isDisable() || !event.getWallet().hasPaymentCode() || !AppServices.onlineProperty().get());
+                showPayNym.setDisable(exportWallet.isDisable() || !event.getWallet().hasPaymentCode());
                 findMixingPartner.setDisable(exportWallet.isDisable() || !SorobanServices.canWalletMix(event.getWallet()) || !AppServices.onlineProperty().get());
             }
         }

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

@@ -710,11 +710,18 @@ public class AppServices {
     }
 
     public static Optional<ButtonType> showAlertDialog(String title, String content, Alert.AlertType alertType, ButtonType... buttons) {
+        return showAlertDialog(title, content, alertType, null, buttons);
+    }
+
+    public static Optional<ButtonType> showAlertDialog(String title, String content, Alert.AlertType alertType, Node graphic, ButtonType... buttons) {
         Alert alert = new Alert(alertType, content, buttons);
         setStageIcon(alert.getDialogPane().getScene().getWindow());
         alert.getDialogPane().getScene().getStylesheets().add(AppServices.class.getResource("general.css").toExternalForm());
         alert.setTitle(title);
         alert.setHeaderText(title);
+        if(graphic != null) {
+            alert.setGraphic(graphic);
+        }
 
         Pattern linkPattern = Pattern.compile("\\[(http.+)]");
         Matcher matcher = linkPattern.matcher(content);

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

@@ -3,10 +3,7 @@ package com.sparrowwallet.sparrow.control;
 import com.sparrowwallet.drongo.KeyPurpose;
 import com.sparrowwallet.drongo.Utils;
 import com.sparrowwallet.drongo.address.Address;
-import com.sparrowwallet.drongo.protocol.ScriptType;
-import com.sparrowwallet.drongo.protocol.Transaction;
-import com.sparrowwallet.drongo.protocol.TransactionInput;
-import com.sparrowwallet.drongo.protocol.TransactionOutput;
+import com.sparrowwallet.drongo.protocol.*;
 import com.sparrowwallet.drongo.wallet.*;
 import com.sparrowwallet.sparrow.AppServices;
 import com.sparrowwallet.sparrow.EventManager;
@@ -242,20 +239,36 @@ public class EntryCell extends TreeTableCell<Entry, Entry> {
                     label += (label.isEmpty() ? "" : " ") + "(Replaced By Fee)";
                 }
 
-                return new Payment(txOutput.getScript().getToAddresses()[0], label, txOutput.getValue(), false);
+                if(txOutput.getScript().getToAddress() != null) {
+                    return new Payment(txOutput.getScript().getToAddress(), label, txOutput.getValue(), false);
+                }
+
+                return null;
             } catch(Exception e) {
                 log.error("Error creating RBF payment", e);
                 return null;
             }
         }).filter(Objects::nonNull).collect(Collectors.toList());
 
+        List<byte[]> opReturns = externalOutputs.stream().map(txOutput -> {
+            List<ScriptChunk> scriptChunks = txOutput.getScript().getChunks();
+            if(scriptChunks.size() != 2 || scriptChunks.get(0).getOpcode() != ScriptOpCodes.OP_RETURN) {
+                return null;
+            }
+            if(scriptChunks.get(1).getData() != null) {
+                return scriptChunks.get(1).getData();
+            }
+
+            return null;
+        }).filter(Objects::nonNull).collect(Collectors.toList());
+
         if(payments.isEmpty()) {
             AppServices.showErrorDialog("Replace By Fee Error", "Error creating RBF transaction, check log for details");
             return;
         }
 
         EventManager.get().post(new SendActionEvent(transactionEntry.getWallet(), utxos));
-        Platform.runLater(() -> EventManager.get().post(new SpendUtxoEvent(transactionEntry.getWallet(), utxos, payments, blockTransaction.getFee(), true)));
+        Platform.runLater(() -> EventManager.get().post(new SpendUtxoEvent(transactionEntry.getWallet(), utxos, payments, opReturns.isEmpty() ? null : opReturns, blockTransaction.getFee(), true)));
     }
 
     private static Double getMaxFeeRate() {
@@ -287,7 +300,7 @@ public class EntryCell extends TreeTableCell<Entry, Entry> {
         Payment payment = new Payment(freshNode.getAddress(), label, utxo.getValue(), true);
 
         EventManager.get().post(new SendActionEvent(transactionEntry.getWallet(), List.of(utxo)));
-        Platform.runLater(() -> EventManager.get().post(new SpendUtxoEvent(transactionEntry.getWallet(), List.of(utxo), List.of(payment), blockTransaction.getFee(), false)));
+        Platform.runLater(() -> EventManager.get().post(new SpendUtxoEvent(transactionEntry.getWallet(), List.of(utxo), List.of(payment), null, blockTransaction.getFee(), false)));
     }
 
     private static boolean canSignMessage(WalletNode walletNode) {

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

@@ -39,7 +39,7 @@ public class PayNymAvatar extends StackPane {
                 String cacheId = getCacheId(paymentCode, getPrefWidth());
                 if(paymentCodeCache.containsKey(cacheId)) {
                     setImage(paymentCodeCache.get(cacheId));
-                } else {
+                } else if(AppServices.isConnected()) {
                     PayNymAvatarService payNymAvatarService = new PayNymAvatarService(paymentCode, getPrefWidth());
                     payNymAvatarService.setOnRunning(runningEvent -> {
                         getChildren().clear();
@@ -48,7 +48,7 @@ public class PayNymAvatar extends StackPane {
                         setImage(payNymAvatarService.getValue());
                     });
                     payNymAvatarService.setOnFailed(failedEvent -> {
-                        log.error("Error", failedEvent.getSource().getException());
+                        log.debug("Error loading PayNym avatar", failedEvent.getSource().getException());
                     });
                     payNymAvatarService.start();
                 }

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

@@ -1,5 +1,8 @@
 package com.sparrowwallet.sparrow.control;
 
+import com.sparrowwallet.drongo.wallet.Wallet;
+import com.sparrowwallet.sparrow.EventManager;
+import com.sparrowwallet.sparrow.event.WalletLabelChangedEvent;
 import com.sparrowwallet.sparrow.glyphfont.FontAwesome5;
 import com.sparrowwallet.sparrow.paynym.PayNym;
 import com.sparrowwallet.sparrow.paynym.PayNymController;
@@ -10,6 +13,8 @@ import javafx.scene.layout.BorderPane;
 import javafx.scene.layout.HBox;
 import org.controlsfx.glyphfont.Glyph;
 
+import java.util.Optional;
+
 public class PayNymCell extends ListCell<PayNym> {
     private final PayNymController payNymController;
 
@@ -83,6 +88,12 @@ public class PayNymCell extends ListCell<PayNym> {
 
             setText(null);
             setGraphic(pane);
+
+            if(payNymController != null && payNym.nymId() == null) {
+                setContextMenu(new PayNymCellContextMenu(payNym));
+            } else {
+                setContextMenu(null);
+            }
         }
     }
 
@@ -91,4 +102,30 @@ public class PayNymCell extends ListCell<PayNym> {
         failGlyph.setFontSize(12);
         return failGlyph;
     }
+
+    private class PayNymCellContextMenu extends ContextMenu {
+        public PayNymCellContextMenu(PayNym payNym) {
+            MenuItem rename = new MenuItem("Rename Contact...");
+            rename.setOnAction(event -> {
+                WalletLabelDialog walletLabelDialog = new WalletLabelDialog(payNym.nymName(), "Contact");
+                Optional<String> optLabel = walletLabelDialog.showAndWait();
+                if(optLabel.isPresent()) {
+                    int index = getListView().getItems().indexOf(payNym);
+                    for(Wallet childWallet : payNymController.getMasterWallet().getChildWallets()) {
+                        if(childWallet.isBip47()
+                                && childWallet.getKeystores().get(0).getExternalPaymentCode().equals(payNym.paymentCode())
+                                && (childWallet.getLabel() == null || childWallet.getLabel().startsWith(payNym.nymName()))) {
+                            childWallet.setLabel(optLabel.get() + " " + childWallet.getScriptType().getName());
+                            EventManager.get().post(new WalletLabelChangedEvent(childWallet));
+                        }
+                    }
+
+                    payNymController.updateFollowing();
+                    getListView().getSelectionModel().select(index);
+                }
+            });
+
+            getItems().add(rename);
+        }
+    }
 }

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

@@ -1,6 +1,7 @@
 package com.sparrowwallet.sparrow.control;
 
 import com.sparrowwallet.sparrow.AppServices;
+import javafx.beans.property.*;
 import javafx.concurrent.Worker;
 import javafx.scene.control.DialogPane;
 import javafx.scene.image.Image;
@@ -22,4 +23,117 @@ public class ServiceProgressDialog extends ProgressDialog {
         Image image = new Image(imagePath);
         dialogPane.setGraphic(new ImageView(image));
     }
+
+    public static class ProxyWorker implements Worker<Boolean> {
+        private final ObjectProperty<State> state = new SimpleObjectProperty<>(this, "state", State.READY);
+        private final StringProperty message = new SimpleStringProperty(this, "message", "");
+        private final DoubleProperty progress = new SimpleDoubleProperty(this, "progress", -1);
+
+        public void start() {
+            state.set(State.SCHEDULED);
+        }
+
+        public void end() {
+            state.set(State.SUCCEEDED);
+        }
+
+        @Override
+        public State getState() {
+            return state.get();
+        }
+
+        @Override
+        public ReadOnlyObjectProperty<State> stateProperty() {
+            return state;
+        }
+
+        @Override
+        public Boolean getValue() {
+            return Boolean.TRUE;
+        }
+
+        @Override
+        public ReadOnlyObjectProperty<Boolean> valueProperty() {
+            return null;
+        }
+
+        @Override
+        public Throwable getException() {
+            return null;
+        }
+
+        @Override
+        public ReadOnlyObjectProperty<Throwable> exceptionProperty() {
+            return null;
+        }
+
+        @Override
+        public double getWorkDone() {
+            return 0;
+        }
+
+        @Override
+        public ReadOnlyDoubleProperty workDoneProperty() {
+            return null;
+        }
+
+        @Override
+        public double getTotalWork() {
+            return 0;
+        }
+
+        @Override
+        public ReadOnlyDoubleProperty totalWorkProperty() {
+            return null;
+        }
+
+        @Override
+        public double getProgress() {
+            return progress.get();
+        }
+
+        @Override
+        public ReadOnlyDoubleProperty progressProperty() {
+            return progress;
+        }
+
+        @Override
+        public boolean isRunning() {
+            return false;
+        }
+
+        @Override
+        public ReadOnlyBooleanProperty runningProperty() {
+            return null;
+        }
+
+        @Override
+        public String getMessage() {
+            return message.get();
+        }
+
+        public void setMessage(String strMessage) {
+            message.set(strMessage);
+        }
+
+        @Override
+        public ReadOnlyStringProperty messageProperty() {
+            return message;
+        }
+
+        @Override
+        public String getTitle() {
+            return null;
+        }
+
+        @Override
+        public ReadOnlyStringProperty titleProperty() {
+            return null;
+        }
+
+        @Override
+        public boolean cancel() {
+            return false;
+        }
+    }
 }

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

@@ -10,19 +10,26 @@ import javafx.scene.layout.VBox;
 import org.controlsfx.control.textfield.CustomTextField;
 import org.controlsfx.control.textfield.TextFields;
 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;
 
 public class WalletLabelDialog extends Dialog<String> {
+    private static final int MAX_LABEL_LENGTH = 25;
+
     private final CustomTextField label;
 
     public WalletLabelDialog(String initialName) {
+        this(initialName, "Account");
+    }
+
+    public WalletLabelDialog(String initialName, String walletType) {
         final DialogPane dialogPane = getDialogPane();
         AppServices.setStageIcon(dialogPane.getScene().getWindow());
 
-        setTitle("Account Name");
-        dialogPane.setHeaderText("Enter a name for this account:");
+        setTitle(walletType + " Name");
+        dialogPane.setHeaderText("Enter a name for this " + walletType.toLowerCase() + ":");
         dialogPane.getStylesheets().add(AppServices.class.getResource("general.css").toExternalForm());
         dialogPane.getButtonTypes().addAll(ButtonType.CANCEL);
         dialogPane.setPrefWidth(400);
@@ -48,17 +55,18 @@ public class WalletLabelDialog extends Dialog<String> {
         Platform.runLater(() -> {
             validationSupport.setValidationDecorator(new StyleClassValidationDecoration());
             validationSupport.registerValidator(label, Validator.combine(
-                    Validator.createEmptyValidator("Account name is required")
+                    Validator.createEmptyValidator(walletType + " name is required"),
+                    (Control c, String newValue) -> ValidationResult.fromErrorIf(c, "Label too long", newValue != null && newValue.length() > MAX_LABEL_LENGTH)
             ));
         });
 
-        final ButtonType okButtonType = new javafx.scene.control.ButtonType("Rename Account", ButtonBar.ButtonData.OK_DONE);
+        final ButtonType okButtonType = new javafx.scene.control.ButtonType("Rename " + walletType, ButtonBar.ButtonData.OK_DONE);
         dialogPane.getButtonTypes().addAll(okButtonType);
         Button okButton = (Button)dialogPane.lookupButton(okButtonType);
-        BooleanBinding isInvalid = Bindings.createBooleanBinding(() -> label.getText().length() == 0, label.textProperty());
+        BooleanBinding isInvalid = Bindings.createBooleanBinding(() -> label.getText().length() == 0 || label.getText().length() > MAX_LABEL_LENGTH, label.textProperty());
         okButton.disableProperty().bind(isInvalid);
 
-        label.setPromptText("Account Name");
+        label.setPromptText(walletType + " Name");
         Platform.runLater(label::requestFocus);
         setResultConverter(dialogButton -> dialogButton == okButtonType ? label.getText() : null);
     }

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

@@ -1,6 +1,7 @@
 package com.sparrowwallet.sparrow.event;
 
 import com.samourai.whirlpool.client.whirlpool.beans.Pool;
+import com.sparrowwallet.drongo.bip47.PaymentCode;
 import com.sparrowwallet.drongo.wallet.BlockTransactionHashIndex;
 import com.sparrowwallet.drongo.wallet.Payment;
 import com.sparrowwallet.drongo.wallet.Wallet;
@@ -15,19 +16,21 @@ public class SpendUtxoEvent {
     private final Long fee;
     private final boolean includeSpentMempoolOutputs;
     private final Pool pool;
+    private final PaymentCode paymentCode;
 
     public SpendUtxoEvent(Wallet wallet, List<BlockTransactionHashIndex> utxos) {
-        this(wallet, utxos, null, null, false);
+        this(wallet, utxos, null, null, null, false);
     }
 
-    public SpendUtxoEvent(Wallet wallet, List<BlockTransactionHashIndex> utxos, List<Payment> payments, Long fee, boolean includeSpentMempoolOutputs) {
+    public SpendUtxoEvent(Wallet wallet, List<BlockTransactionHashIndex> utxos, List<Payment> payments, List<byte[]> opReturns, Long fee, boolean includeSpentMempoolOutputs) {
         this.wallet = wallet;
         this.utxos = utxos;
         this.payments = payments;
-        this.opReturns = null;
+        this.opReturns = opReturns;
         this.fee = fee;
         this.includeSpentMempoolOutputs = includeSpentMempoolOutputs;
         this.pool = null;
+        this.paymentCode = null;
     }
 
     public SpendUtxoEvent(Wallet wallet, List<BlockTransactionHashIndex> utxos, List<Payment> payments, List<byte[]> opReturns, Long fee, Pool pool) {
@@ -38,6 +41,18 @@ public class SpendUtxoEvent {
         this.fee = fee;
         this.includeSpentMempoolOutputs = false;
         this.pool = pool;
+        this.paymentCode = null;
+    }
+
+    public SpendUtxoEvent(Wallet wallet, List<Payment> payments, List<byte[]> opReturns, PaymentCode paymentCode) {
+        this.wallet = wallet;
+        this.utxos = null;
+        this.payments = payments;
+        this.opReturns = opReturns;
+        this.fee = null;
+        this.includeSpentMempoolOutputs = false;
+        this.pool = null;
+        this.paymentCode = paymentCode;
     }
 
     public Wallet getWallet() {
@@ -67,4 +82,8 @@ public class SpendUtxoEvent {
     public Pool getPool() {
         return pool;
     }
+
+    public PaymentCode getPaymentCode() {
+        return paymentCode;
+    }
 }

src/main/java/com/sparrowwallet/sparrow/paynym/PayNym.java

@@ -3,9 +3,11 @@ package com.sparrowwallet.sparrow.paynym;
 import com.sparrowwallet.drongo.bip47.InvalidPaymentCodeException;
 import com.sparrowwallet.drongo.bip47.PaymentCode;
 import com.sparrowwallet.drongo.protocol.ScriptType;
+import com.sparrowwallet.drongo.wallet.Wallet;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import java.util.Collections;
 import java.util.List;
 
 public class PayNym {
@@ -74,4 +76,22 @@ public class PayNym {
 
         return new PayNym(paymentCode, nymId, nymName, segwit, following, followers);
     }
+
+    public static PayNym fromWallet(Wallet bip47Wallet) {
+        if(!bip47Wallet.isBip47()) {
+            throw new IllegalArgumentException("Not a BIP47 wallet");
+        }
+
+        PaymentCode externalPaymentCode = bip47Wallet.getKeystores().get(0).getExternalPaymentCode();
+        String nymName = externalPaymentCode.toAbbreviatedString();
+        if(bip47Wallet.getLabel() != null) {
+            String suffix = " " + bip47Wallet.getScriptType().getName();
+            if(bip47Wallet.getLabel().endsWith(suffix)) {
+                nymName = bip47Wallet.getLabel().substring(0, bip47Wallet.getLabel().length() - suffix.length());
+            }
+        }
+
+        boolean segwit = bip47Wallet.getScriptType() != ScriptType.P2PKH;
+        return new PayNym(externalPaymentCode, null, nymName, segwit, Collections.emptyList(), Collections.emptyList());
+    }
 }

src/main/java/com/sparrowwallet/sparrow/paynym/PayNymController.java

@@ -18,10 +18,7 @@ import com.sparrowwallet.sparrow.net.ElectrumServer;
 import com.sparrowwallet.sparrow.wallet.Entry;
 import com.sparrowwallet.sparrow.wallet.TransactionEntry;
 import javafx.application.Platform;
-import javafx.beans.property.ObjectProperty;
-import javafx.beans.property.SimpleObjectProperty;
-import javafx.beans.property.SimpleStringProperty;
-import javafx.beans.property.StringProperty;
+import javafx.beans.property.*;
 import javafx.collections.FXCollections;
 import javafx.collections.ObservableList;
 import javafx.event.ActionEvent;
@@ -34,18 +31,19 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import java.util.*;
+import java.util.function.Function;
 import java.util.function.UnaryOperator;
 import java.util.regex.Pattern;
+import java.util.stream.Collectors;
 
 import static com.sparrowwallet.sparrow.AppServices.showErrorDialog;
+import static com.sparrowwallet.sparrow.wallet.PaymentController.MINIMUM_P2PKH_OUTPUT_SATS;
 
 public class PayNymController {
     private static final Logger log = LoggerFactory.getLogger(PayNymController.class);
 
     public static final Pattern PAYNYM_REGEX = Pattern.compile("\\+[a-z]+[0-9][0-9a-fA-F][0-9a-fA-F]");
 
-    private static final long MINIMUM_P2PKH_OUTPUT_SATS = 546L;
-
     private String walletId;
     private boolean selectLinkedOnly;
     private PayNym walletPayNym;
@@ -65,6 +63,9 @@ public class PayNymController {
     @FXML
     private CopyableTextField searchPayNyms;
 
+    @FXML
+    private Button searchPayNymsScan;
+
     @FXML
     private ProgressIndicator findPayNym;
 
@@ -83,6 +84,8 @@ public class PayNymController {
 
     private final Map<Sha256Hash, PayNym> notificationTransactions = new HashMap<>();
 
+    private final BooleanProperty closeProperty = new SimpleBooleanProperty(false);
+
     public void initializeView(String walletId, boolean selectLinkedOnly) {
         this.walletId = walletId;
         this.selectLinkedOnly = selectLinkedOnly;
@@ -90,6 +93,7 @@ public class PayNymController {
         payNymName.managedProperty().bind(payNymName.visibleProperty());
         payNymRetrieve.managedProperty().bind(payNymRetrieve.visibleProperty());
         payNymRetrieve.visibleProperty().bind(payNymName.visibleProperty().not());
+        payNymRetrieve.setDisable(!AppServices.isConnected());
 
         retrievePayNymProgress.managedProperty().bind(retrievePayNymProgress.visibleProperty());
         retrievePayNymProgress.maxHeightProperty().bind(payNymName.heightProperty());
@@ -132,6 +136,8 @@ public class PayNymController {
 
             return change;
         };
+        searchPayNymsScan.disableProperty().bind(searchPayNyms.disableProperty());
+        searchPayNyms.setDisable(true);
         searchPayNyms.setTextFormatter(new TextFormatter<>(paymentCodeFilter));
         searchPayNyms.addEventFilter(KeyEvent.ANY, event -> {
             if(event.getCode() == KeyCode.ENTER) {
@@ -158,10 +164,11 @@ public class PayNymController {
         followersList.setSelectionModel(new NoSelectionModel<>());
         followersList.setFocusTraversable(false);
 
-        if(Config.get().isUsePayNym() && masterWallet.hasPaymentCode()) {
+        if(Config.get().isUsePayNym() && AppServices.isConnected() && masterWallet.hasPaymentCode()) {
             refresh();
         } else {
             payNymName.setVisible(false);
+            updateFollowing();
         }
     }
 
@@ -174,12 +181,13 @@ public class PayNymController {
         AppServices.getPayNymService().getPayNym(getMasterWallet().getPaymentCode().toString()).subscribe(payNym -> {
             retrievePayNymProgress.setVisible(false);
             walletPayNym = payNym;
+            searchPayNyms.setDisable(false);
             payNymName.setText(payNym.nymName());
             paymentCode.setPaymentCode(payNym.paymentCode());
             payNymAvatar.setPaymentCode(payNym.paymentCode());
             followingList.setUserData(null);
             followingList.setPlaceholder(new Label("No contacts"));
-            followingList.setItems(FXCollections.observableList(payNym.following()));
+            updateFollowing();
             followersList.setPlaceholder(new Label("No followers"));
             followersList.setItems(FXCollections.observableList(payNym.followers()));
             Platform.runLater(() -> addWalletIfNotificationTransactionPresent(payNym.following()));
@@ -187,6 +195,7 @@ public class PayNymController {
             retrievePayNymProgress.setVisible(false);
             if(error.getMessage().endsWith("404")) {
                 payNymName.setVisible(false);
+                updateFollowing();
             } else {
                 log.error("Error retrieving PayNym", error);
                 Optional<ButtonType> optResponse = showErrorDialog("Error retrieving PayNym", "Could not retrieve PayNym. Try again?", ButtonType.CANCEL, ButtonType.OK);
@@ -194,6 +203,7 @@ public class PayNymController {
                     refresh();
                 } else {
                     payNymName.setVisible(false);
+                    updateFollowing();
                 }
             }
         });
@@ -202,7 +212,7 @@ public class PayNymController {
     private void resetFollowing() {
         if(followingList.getUserData() != null) {
             followingList.setUserData(null);
-            followingList.setItems(FXCollections.observableList(walletPayNym.following()));
+            updateFollowing();
         }
     }
 
@@ -300,6 +310,33 @@ public class PayNymController {
         return getMasterWallet().getChildWallet(externalPaymentCode, payNym.segwit() ? ScriptType.P2WPKH : ScriptType.P2PKH) != null;
     }
 
+    public void updateFollowing() {
+        List<PayNym> followingPayNyms = new ArrayList<>();
+        if(walletPayNym != null) {
+            followingPayNyms.addAll(walletPayNym.following());
+        }
+
+        Map<PaymentCode, PayNym> followingPayNymMap = followingPayNyms.stream().collect(Collectors.toMap(PayNym::paymentCode, Function.identity()));
+        followingPayNyms.addAll(getExistingWalletPayNyms(followingPayNymMap));
+        followingList.setItems(FXCollections.observableList(followingPayNyms));
+    }
+
+    private List<PayNym> getExistingWalletPayNyms(Map<PaymentCode, PayNym> followingPayNymMap) {
+        Map<PaymentCode, PayNym> existingPayNyms = new LinkedHashMap<>();
+        List<Wallet> childWallets = new ArrayList<>(getMasterWallet().getChildWallets());
+        childWallets.sort(Comparator.comparingInt(o -> -o.getScriptType().ordinal()));
+        for(Wallet childWallet : childWallets) {
+            if(childWallet.isBip47()) {
+                PaymentCode externalPaymentCode = childWallet.getKeystores().get(0).getExternalPaymentCode();
+                if(!existingPayNyms.containsKey(externalPaymentCode) && !followingPayNymMap.containsKey(externalPaymentCode)) {
+                    existingPayNyms.put(externalPaymentCode, PayNym.fromWallet(childWallet));
+                }
+            }
+        }
+
+        return new ArrayList<>(existingPayNyms.values());
+    }
+
     private void addWalletIfNotificationTransactionPresent(List<PayNym> following) {
         Map<BlockTransaction, PayNym> unlinkedPayNyms = new HashMap<>();
         Map<BlockTransaction, WalletNode> unlinkedNotifications = new HashMap<>();
@@ -397,11 +434,20 @@ public class PayNymController {
     }
 
     public void linkPayNym(PayNym payNym) {
+        ButtonType previewType = new ButtonType("Preview", ButtonBar.ButtonData.LEFT);
+        ButtonType sendType = new ButtonType("Send", ButtonBar.ButtonData.YES);
         Optional<ButtonType> optButtonType = AppServices.showAlertDialog("Link PayNym?",
                 "Linking to this contact will allow you to send to it non-collaboratively through unique private addresses you can generate independently.\n\n" +
-                "It will cost " + MINIMUM_P2PKH_OUTPUT_SATS + " sats to create the link, plus the mining fee. Send transaction?", Alert.AlertType.CONFIRMATION, ButtonType.NO, ButtonType.YES);
-        if(optButtonType.isPresent() && optButtonType.get() == ButtonType.YES) {
+                "It will cost " + MINIMUM_P2PKH_OUTPUT_SATS + " sats to create the link through a notification transaction, plus the mining fee. Send transaction?", Alert.AlertType.CONFIRMATION, previewType, ButtonType.CANCEL, sendType);
+        if(optButtonType.isPresent() && optButtonType.get() == sendType) {
             broadcastNotificationTransaction(payNym);
+        } else if(optButtonType.isPresent() && optButtonType.get() == previewType) {
+            PaymentCode paymentCode = payNym.paymentCode();
+            Payment payment = new Payment(paymentCode.getNotificationAddress(), "Link " + payNym.nymName(), MINIMUM_P2PKH_OUTPUT_SATS, false);
+            Wallet wallet = AppServices.get().getWallet(walletId);
+            EventManager.get().post(new SendActionEvent(wallet, new ArrayList<>(wallet.getWalletUtxos().keySet())));
+            Platform.runLater(() -> EventManager.get().post(new SpendUtxoEvent(wallet, List.of(payment), List.of(new byte[80]), paymentCode)));
+            closeProperty.set(true);
         } else {
             followingList.refresh();
         }
@@ -544,7 +590,7 @@ public class PayNymController {
         return wallet.createWalletTransaction(utxoSelectors, utxoFilters, payments, opReturns, Collections.emptySet(), feeRate, minimumFeeRate, null, AppServices.getCurrentBlockHeight(), groupByAddress, includeMempoolOutputs, false);
     }
 
-    private Wallet getMasterWallet() {
+    public Wallet getMasterWallet() {
         Wallet wallet = AppServices.get().getWallet(walletId);
         return wallet.isMasterWallet() ? wallet : wallet.getMasterWallet();
     }
@@ -561,6 +607,10 @@ public class PayNymController {
         return payNymProperty;
     }
 
+    public BooleanProperty closeProperty() {
+        return closeProperty;
+    }
+
     @Subscribe
     public void walletHistoryChanged(WalletHistoryChangedEvent event) {
         List<Entry> changedLabelEntries = new ArrayList<>();

src/main/java/com/sparrowwallet/sparrow/paynym/PayNymDialog.java

@@ -48,6 +48,12 @@ public class PayNymDialog extends Dialog<PayNym> {
                 dialogPane.getButtonTypes().add(doneButtonType);
             }
 
+            payNymController.closeProperty().addListener((observable, oldValue, newValue) -> {
+                if(newValue) {
+                    close();
+                }
+            });
+
             setOnCloseRequest(event -> {
                 EventManager.get().unregister(payNymController);
             });

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

@@ -18,10 +18,8 @@ import com.sparrowwallet.sparrow.AppServices;
 import com.sparrowwallet.sparrow.CurrencyRate;
 import com.sparrowwallet.sparrow.EventManager;
 import com.sparrowwallet.sparrow.control.*;
-import com.sparrowwallet.sparrow.event.BitcoinUnitChangedEvent;
-import com.sparrowwallet.sparrow.event.ExchangeRatesUpdatedEvent;
-import com.sparrowwallet.sparrow.event.FiatCurrencySelectedEvent;
-import com.sparrowwallet.sparrow.event.OpenWalletsEvent;
+import com.sparrowwallet.sparrow.event.*;
+import com.sparrowwallet.sparrow.glyphfont.FontAwesome5;
 import com.sparrowwallet.sparrow.io.Config;
 import com.sparrowwallet.sparrow.net.ExchangeSource;
 import com.sparrowwallet.sparrow.paynym.PayNym;
@@ -41,7 +39,7 @@ import javafx.event.ActionEvent;
 import javafx.fxml.FXML;
 import javafx.fxml.Initializable;
 import javafx.scene.control.*;
-import javafx.util.StringConverter;
+import org.controlsfx.glyphfont.Glyph;
 import org.controlsfx.validation.ValidationResult;
 import org.controlsfx.validation.ValidationSupport;
 import org.controlsfx.validation.Validator;
@@ -59,6 +57,8 @@ import static com.sparrowwallet.sparrow.AppServices.showErrorDialog;
 public class PaymentController extends WalletFormController implements Initializable {
     private static final Logger log = LoggerFactory.getLogger(PaymentController.class);
 
+    public static final long MINIMUM_P2PKH_OUTPUT_SATS = 546L;
+
     private SendController sendController;
 
     private ValidationSupport validationSupport;
@@ -115,7 +115,7 @@ public class PaymentController extends WalletFormController implements Initializ
             Long recipientValueSats = getRecipientValueSats();
             if(recipientValueSats != null) {
                 setFiatAmount(AppServices.getFiatCurrencyExchangeRate(), recipientValueSats);
-                dustAmountProperty.set(recipientValueSats <= getRecipientDustThreshold());
+                dustAmountProperty.set(recipientValueSats < getRecipientDustThreshold());
                 emptyAmountProperty.set(false);
             } else {
                 fiatAmount.setText("");
@@ -134,7 +134,7 @@ public class PaymentController extends WalletFormController implements Initializ
     private static final Wallet payNymWallet = new Wallet() {
         @Override
         public String getFullDisplayName() {
-            return "PayNym...";
+            return "PayNym or Payment code...";
         }
     };
 
@@ -150,17 +150,6 @@ public class PaymentController extends WalletFormController implements Initializ
 
     @Override
     public void initializeView() {
-        openWallets.setConverter(new StringConverter<>() {
-            @Override
-            public String toString(Wallet wallet) {
-                return wallet == null ? "" : wallet.getFullDisplayName() + (wallet == sendController.getWalletForm().getWallet() ? " (Consolidation)" : "");
-            }
-
-            @Override
-            public Wallet fromString(String string) {
-                return null;
-            }
-        });
         updateOpenWallets();
         openWallets.prefWidthProperty().bind(address.widthProperty());
         openWallets.valueProperty().addListener((observable, oldValue, newValue) -> {
@@ -168,12 +157,7 @@ public class PaymentController extends WalletFormController implements Initializ
                 boolean selectLinkedOnly = sendController.getPaymentTabs().getTabs().size() > 1 || !SorobanServices.canWalletMix(sendController.getWalletForm().getWallet());
                 PayNymDialog payNymDialog = new PayNymDialog(sendController.getWalletForm().getWalletId(), true, selectLinkedOnly);
                 Optional<PayNym> optPayNym = payNymDialog.showAndWait();
-                if(optPayNym.isPresent()) {
-                    PayNym payNym = optPayNym.get();
-                    payNymProperty.set(payNym);
-                    address.setText(payNym.nymName());
-                    label.requestFocus();
-                }
+                optPayNym.ifPresent(this::setPayNym);
             } else if(newValue != null) {
                 WalletNode freshNode = newValue.getFreshNode(KeyPurpose.RECEIVE);
                 Address freshAddress = freshNode.getAddress();
@@ -181,6 +165,19 @@ public class PaymentController extends WalletFormController implements Initializ
                 label.requestFocus();
             }
         });
+        openWallets.setCellFactory(c -> new ListCell<>() {
+            @Override
+            protected void updateItem(Wallet wallet, boolean empty) {
+                super.updateItem(wallet, empty);
+                if(empty || wallet == null) {
+                    setText(null);
+                    setGraphic(null);
+                } else {
+                    setText(wallet.getFullDisplayName() + (wallet == sendController.getWalletForm().getWallet() ? " (Consolidation)" : ""));
+                    setGraphic(wallet == payNymWallet ? getPayNymGlyph() : null);
+                }
+            }
+        });
 
         payNymProperty.addListener((observable, oldValue, payNym) -> {
             updateMixOnlyStatus(payNym);
@@ -188,6 +185,8 @@ public class PaymentController extends WalletFormController implements Initializ
         });
 
         address.textProperty().addListener((observable, oldValue, newValue) -> {
+            address.leftProperty().set(null);
+
             if(payNymProperty.get() != null && !newValue.equals(payNymProperty.get().nymName())) {
                 payNymProperty.set(null);
             }
@@ -200,6 +199,32 @@ public class PaymentController extends WalletFormController implements Initializ
                 //ignore, not a URI
             }
 
+            if(sendController.getWalletForm().getWallet().hasPaymentCode()) {
+                try {
+                    PaymentCode paymentCode = new PaymentCode(newValue);
+                    Wallet recipientBip47Wallet = sendController.getWalletForm().getWallet().getChildWallet(paymentCode, sendController.getWalletForm().getWallet().getScriptType());
+                    if(recipientBip47Wallet == null && sendController.getWalletForm().getWallet().getScriptType() != ScriptType.P2PKH) {
+                        recipientBip47Wallet = sendController.getWalletForm().getWallet().getChildWallet(paymentCode, ScriptType.P2PKH);
+                    }
+
+                    if(recipientBip47Wallet != null) {
+                        PayNym payNym = PayNym.fromWallet(recipientBip47Wallet);
+                        Platform.runLater(() -> setPayNym(payNym));
+                    } else if(!paymentCode.equals(sendController.getWalletForm().getWallet().getPaymentCode())) {
+                        ButtonType previewType = new ButtonType("Preview Transaction", ButtonBar.ButtonData.YES);
+                        Optional<ButtonType> optButton = AppServices.showAlertDialog("Send notification transaction?", "This payment code is not yet linked with a notification transaction. Send a notification transaction?", Alert.AlertType.CONFIRMATION, ButtonType.CANCEL, previewType);
+                        if(optButton.isPresent() && optButton.get() == previewType) {
+                            Payment payment = new Payment(paymentCode.getNotificationAddress(), "Link " + paymentCode.toAbbreviatedString(), MINIMUM_P2PKH_OUTPUT_SATS, false);
+                            Platform.runLater(() -> EventManager.get().post(new SpendUtxoEvent(sendController.getWalletForm().getWallet(), List.of(payment), List.of(new byte[80]), paymentCode)));
+                        } else {
+                            Platform.runLater(() -> address.setText(""));
+                        }
+                    }
+                } catch(Exception e) {
+                    //ignore, not a payment code
+                }
+            }
+
             revalidateAmount();
             maxButton.setDisable(!isMaxButtonEnabled());
             sendController.updateTransaction();
@@ -253,6 +278,13 @@ public class PaymentController extends WalletFormController implements Initializ
         addValidation(validationSupport);
     }
 
+    public void setPayNym(PayNym payNym) {
+        payNymProperty.set(payNym);
+        address.setText(payNym.nymName());
+        address.leftProperty().set(getPayNymGlyph());
+        label.requestFocus();
+    }
+
     public void updateMixOnlyStatus() {
         updateMixOnlyStatus(payNymProperty.get());
     }
@@ -296,7 +328,7 @@ public class PaymentController extends WalletFormController implements Initializ
         ));
         validationSupport.registerValidator(amount, Validator.combine(
                 (Control c, String newValue) -> ValidationResult.fromErrorIf( c, "Insufficient Inputs", getRecipientValueSats() != null && sendController.isInsufficientInputs()),
-                (Control c, String newValue) -> ValidationResult.fromErrorIf( c, "Insufficient Value", getRecipientValueSats() != null && getRecipientValueSats() <= getRecipientDustThreshold())
+                (Control c, String newValue) -> ValidationResult.fromErrorIf( c, "Insufficient Value", getRecipientValueSats() != null && getRecipientValueSats() < getRecipientDustThreshold())
         ));
     }
 
@@ -394,7 +426,7 @@ public class PaymentController extends WalletFormController implements Initializ
     public void revalidateAmount() {
         revalidate(amount, amountListener);
         Long recipientValueSats = getRecipientValueSats();
-        dustAmountProperty.set(recipientValueSats != null && recipientValueSats <= getRecipientDustThreshold());
+        dustAmountProperty.set(recipientValueSats != null && recipientValueSats < getRecipientDustThreshold());
         emptyAmountProperty.set(recipientValueSats == null);
     }
 
@@ -426,7 +458,7 @@ public class PaymentController extends WalletFormController implements Initializ
             Address recipientAddress = getRecipientAddress();
             Long value = sendAll ? Long.valueOf(getRecipientDustThreshold() + 1) : getRecipientValueSats();
 
-            if(!label.getText().isEmpty() && value != null && value > getRecipientDustThreshold()) {
+            if(!label.getText().isEmpty() && value != null && value >= getRecipientDustThreshold()) {
                 Payment payment = new Payment(recipientAddress, label.getText(), value, sendAll);
                 if(address.getUserData() != null) {
                     payment.setType((Payment.Type)address.getUserData());
@@ -509,6 +541,8 @@ public class PaymentController extends WalletFormController implements Initializ
             QRScanDialog.Result result = optionalResult.get();
             if(result.uri != null) {
                 updateFromURI(result.uri);
+            } else if(result.payload != null) {
+                address.setText(result.payload);
             } else if(result.exception != null) {
                 log.error("Error scanning QR", result.exception);
                 showErrorDialog("Error scanning QR", result.exception.getMessage());
@@ -556,6 +590,14 @@ public class PaymentController extends WalletFormController implements Initializ
         amountUnit.setDisable(disable);
         scanQrButton.setDisable(disable);
         addPaymentButton.setDisable(disable);
+        maxButton.setDisable(disable);
+    }
+
+    public static Glyph getPayNymGlyph() {
+        Glyph payNymGlyph = new Glyph(FontAwesome5.FONT_NAME, FontAwesome5.Glyph.ROBOT);
+        payNymGlyph.getStyleClass().add("paynym-icon");
+        payNymGlyph.setFontSize(12);
+        return payNymGlyph;
     }
 
     @Subscribe

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

@@ -4,10 +4,16 @@ import com.google.common.eventbus.Subscribe;
 import com.samourai.whirlpool.client.whirlpool.beans.Pool;
 import com.sparrowwallet.drongo.BitcoinUnit;
 import com.sparrowwallet.drongo.KeyPurpose;
+import com.sparrowwallet.drongo.SecureString;
 import com.sparrowwallet.drongo.address.Address;
 import com.sparrowwallet.drongo.address.InvalidAddressException;
+import com.sparrowwallet.drongo.bip47.PaymentCode;
+import com.sparrowwallet.drongo.bip47.SecretPoint;
+import com.sparrowwallet.drongo.crypto.ECKey;
+import com.sparrowwallet.drongo.protocol.ScriptType;
 import com.sparrowwallet.drongo.protocol.Sha256Hash;
 import com.sparrowwallet.drongo.protocol.Transaction;
+import com.sparrowwallet.drongo.protocol.TransactionOutPoint;
 import com.sparrowwallet.drongo.psbt.PSBT;
 import com.sparrowwallet.drongo.wallet.*;
 import com.sparrowwallet.sparrow.AppServices;
@@ -19,6 +25,7 @@ import com.sparrowwallet.sparrow.glyphfont.FontAwesome5;
 import com.sparrowwallet.sparrow.io.Config;
 import com.sparrowwallet.sparrow.io.Storage;
 import com.sparrowwallet.sparrow.net.*;
+import com.sparrowwallet.sparrow.paynym.PayNym;
 import com.sparrowwallet.sparrow.soroban.InitiatorDialog;
 import com.sparrowwallet.sparrow.paynym.PayNymAddress;
 import com.sparrowwallet.sparrow.soroban.SorobanServices;
@@ -26,6 +33,7 @@ import com.sparrowwallet.sparrow.whirlpool.Whirlpool;
 import javafx.animation.KeyFrame;
 import javafx.animation.Timeline;
 import javafx.application.Platform;
+import javafx.beans.binding.Bindings;
 import javafx.beans.property.*;
 import javafx.beans.value.ChangeListener;
 import javafx.beans.value.ObservableValue;
@@ -143,6 +151,9 @@ public class SendController extends WalletFormController implements Initializabl
     @FXML
     private Button premixButton;
 
+    @FXML
+    private Button notificationButton;
+
     private StackPane tabHeader;
 
     private final BooleanProperty userFeeSet = new SimpleBooleanProperty(false);
@@ -153,6 +164,8 @@ public class SendController extends WalletFormController implements Initializabl
 
     private final ObjectProperty<Pool> whirlpoolProperty = new SimpleObjectProperty<>(null);
 
+    private final ObjectProperty<PaymentCode> paymentCodeProperty = new SimpleObjectProperty<>(null);
+
     private final ObjectProperty<WalletTransaction> walletTransactionProperty = new SimpleObjectProperty<>(null);
 
     private final BooleanProperty insufficientInputsProperty = new SimpleBooleanProperty(false);
@@ -218,8 +231,9 @@ public class SendController extends WalletFormController implements Initializabl
         }
     };
 
-    private final ChangeListener<Boolean> premixButtonOnlineListener = (observable, oldValue, newValue) -> {
+    private final ChangeListener<Boolean> broadcastButtonsOnlineListener = (observable, oldValue, newValue) -> {
         premixButton.setDisable(!newValue);
+        notificationButton.setDisable(walletTransactionProperty.get() == null || isInsufficientFeeRate() || !newValue);
     };
 
     private ValidationSupport validationSupport;
@@ -397,6 +411,7 @@ public class SendController extends WalletFormController implements Initializabl
             transactionDiagram.update(walletTransaction);
             updatePrivacyAnalysis(walletTransaction);
             createButton.setDisable(walletTransaction == null || isInsufficientFeeRate() || isPayNymMixOnlyPayment(walletTransaction.getPayments()));
+            notificationButton.setDisable(walletTransaction == null || isInsufficientFeeRate() || !AppServices.isConnected());
         });
 
         transactionDiagram.sceneProperty().addListener((observable, oldScene, newScene) -> {
@@ -430,9 +445,11 @@ public class SendController extends WalletFormController implements Initializabl
 
         createButton.managedProperty().bind(createButton.visibleProperty());
         premixButton.managedProperty().bind(premixButton.visibleProperty());
-        createButton.visibleProperty().bind(premixButton.visibleProperty().not());
+        notificationButton.managedProperty().bind(notificationButton.visibleProperty());
+        createButton.visibleProperty().bind(Bindings.and(premixButton.visibleProperty().not(), notificationButton.visibleProperty().not()));
         premixButton.setVisible(false);
-        AppServices.onlineProperty().addListener(new WeakChangeListener<>(premixButtonOnlineListener));
+        notificationButton.setVisible(false);
+        AppServices.onlineProperty().addListener(new WeakChangeListener<>(broadcastButtonsOnlineListener));
     }
 
     private void initializeTabHeader(int count) {
@@ -582,6 +599,7 @@ public class SendController extends WalletFormController implements Initializabl
                     if(currentWalletTransactionService.isRunning()) {
                         transactionDiagram.update("Selecting UTXOs...");
                         createButton.setDisable(true);
+                        notificationButton.setDisable(true);
                     }
                 });
                 final Timeline timeline = new Timeline(delay);
@@ -1047,13 +1065,17 @@ public class SendController extends WalletFormController implements Initializabl
 
         validationSupport.setErrorDecorationEnabled(false);
 
-        setInputFieldsDisabled(false);
+        setInputFieldsDisabled(false, false);
 
         efficiencyToggle.setDisable(false);
         privacyToggle.setDisable(false);
 
         premixButton.setVisible(false);
+        notificationButton.setVisible(false);
         createButton.setDefaultButton(true);
+
+        whirlpoolProperty.set(null);
+        paymentCodeProperty.set(null);
     }
 
     public UtxoSelector getUtxoSelector() {
@@ -1181,18 +1203,182 @@ public class SendController extends WalletFormController implements Initializabl
         tx0BroadcastService.start();
     }
 
-    private void setInputFieldsDisabled(boolean disable) {
+    public void broadcastNotification(ActionEvent event) {
+        Wallet wallet = getWalletForm().getWallet();
+        Storage storage = AppServices.get().getOpenWallets().get(wallet);
+        if(wallet.isEncrypted()) {
+            WalletPasswordDialog dlg = new WalletPasswordDialog(wallet.getMasterName(), WalletPasswordDialog.PasswordRequirement.LOAD);
+            Optional<SecureString> password = dlg.showAndWait();
+            if(password.isPresent()) {
+                Storage.DecryptWalletService decryptWalletService = new Storage.DecryptWalletService(wallet.copy(), password.get());
+                decryptWalletService.setOnSucceeded(workerStateEvent -> {
+                    EventManager.get().post(new StorageEvent(storage.getWalletId(wallet), TimedEvent.Action.END, "Done"));
+                    Wallet decryptedWallet = decryptWalletService.getValue();
+                    broadcastNotification(decryptedWallet);
+                    decryptedWallet.clearPrivate();
+                });
+                decryptWalletService.setOnFailed(workerStateEvent -> {
+                    EventManager.get().post(new StorageEvent(storage.getWalletId(wallet), TimedEvent.Action.END, "Failed"));
+                    AppServices.showErrorDialog("Incorrect Password", decryptWalletService.getException().getMessage());
+                });
+                EventManager.get().post(new StorageEvent(storage.getWalletId(wallet), TimedEvent.Action.START, "Decrypting wallet..."));
+                decryptWalletService.start();
+            }
+        } else {
+            broadcastNotification(wallet);
+        }
+    }
+
+    public void broadcastNotification(Wallet decryptedWallet) {
+        try {
+            PaymentCode paymentCode = decryptedWallet.getPaymentCode();
+            PaymentCode externalPaymentCode = paymentCodeProperty.get();
+            WalletTransaction walletTransaction = walletTransactionProperty.get();
+            WalletNode input0Node = walletTransaction.getSelectedUtxos().entrySet().iterator().next().getValue();
+            Keystore keystore = input0Node.getWallet().isNested() ? decryptedWallet.getChildWallet(input0Node.getWallet().getName()).getKeystores().get(0) : decryptedWallet.getKeystores().get(0);
+            ECKey input0Key = keystore.getKey(input0Node);
+            TransactionOutPoint input0Outpoint = walletTransaction.getTransaction().getInputs().iterator().next().getOutpoint();
+            SecretPoint secretPoint = new SecretPoint(input0Key.getPrivKeyBytes(), externalPaymentCode.getNotificationKey().getPubKey());
+            byte[] blindingMask = PaymentCode.getMask(secretPoint.ECDHSecretAsBytes(), input0Outpoint.bitcoinSerialize());
+            byte[] blindedPaymentCode = PaymentCode.blind(paymentCode.getPayload(), blindingMask);
+
+            List<UtxoSelector> utxoSelectors = List.of(new PresetUtxoSelector(walletTransaction.getSelectedUtxos().keySet(), true));
+            Long userFee = userFeeSet.get() ? getFeeValueSats() : null;
+            double feeRate = getUserFeeRate();
+            Integer currentBlockHeight = AppServices.getCurrentBlockHeight();
+            boolean groupByAddress = Config.get().isGroupByAddress();
+            boolean includeMempoolOutputs = Config.get().isIncludeMempoolOutputs();
+            boolean includeSpentMempoolOutputs = includeSpentMempoolOutputsProperty.get();
+
+            WalletTransaction finalWalletTx = decryptedWallet.createWalletTransaction(utxoSelectors, getUtxoFilters(), walletTransaction.getPayments(), List.of(blindedPaymentCode), excludedChangeNodes, feeRate, getMinimumFeeRate(), userFee, currentBlockHeight, groupByAddress, includeMempoolOutputs, includeSpentMempoolOutputs);
+            PSBT psbt = finalWalletTx.createPSBT();
+            decryptedWallet.sign(psbt);
+            decryptedWallet.finalise(psbt);
+            Transaction transaction = psbt.extractTransaction();
+
+            ServiceProgressDialog.ProxyWorker proxyWorker = new ServiceProgressDialog.ProxyWorker();
+            ElectrumServer.BroadcastTransactionService broadcastTransactionService = new ElectrumServer.BroadcastTransactionService(transaction);
+            broadcastTransactionService.setOnSucceeded(successEvent -> {
+                ElectrumServer.TransactionMempoolService transactionMempoolService = new ElectrumServer.TransactionMempoolService(walletTransaction.getWallet(), transaction.getTxId(), new HashSet<>(walletTransaction.getSelectedUtxos().values()));
+                transactionMempoolService.setDelay(Duration.seconds(2));
+                transactionMempoolService.setPeriod(Duration.seconds(5));
+                transactionMempoolService.setRestartOnFailure(false);
+                transactionMempoolService.setOnSucceeded(mempoolWorkerStateEvent -> {
+                    Set<String> scriptHashes = transactionMempoolService.getValue();
+                    if(!scriptHashes.isEmpty()) {
+                        transactionMempoolService.cancel();
+                        clear(null);
+                        if(Config.get().isUsePayNym()) {
+                            proxyWorker.setMessage("Finding PayNym...");
+                            AppServices.getPayNymService().getPayNym(externalPaymentCode.toString()).subscribe(payNym -> {
+                                proxyWorker.end();
+                                addChildWallets(walletTransaction.getWallet(), externalPaymentCode, transaction, payNym);
+                            }, error -> {
+                                proxyWorker.end();
+                                addChildWallets(walletTransaction.getWallet(), externalPaymentCode, transaction, null);
+                            });
+                        } else {
+                            proxyWorker.end();
+                            addChildWallets(walletTransaction.getWallet(), externalPaymentCode, transaction, null);
+                        }
+                    }
+
+                    if(transactionMempoolService.getIterationCount() > 5 && transactionMempoolService.isRunning()) {
+                        transactionMempoolService.cancel();
+                        proxyWorker.end();
+                        log.error("Timeout searching for broadcasted notification transaction");
+                        AppServices.showErrorDialog("Timeout searching for broadcasted transaction", "The transaction was broadcast but the server did not register it in the mempool. It is safe to try broadcasting again.");
+                    }
+                });
+                transactionMempoolService.setOnFailed(mempoolWorkerStateEvent -> {
+                    transactionMempoolService.cancel();
+                    proxyWorker.end();
+                    log.error("Error searching for broadcasted notification transaction", mempoolWorkerStateEvent.getSource().getException());
+                    AppServices.showErrorDialog("Timeout searching for broadcasted transaction", "The transaction was broadcast but the server did not register it in the mempool. It is safe to try broadcasting again.");
+                });
+                proxyWorker.setMessage("Receiving notification transaction...");
+                transactionMempoolService.start();
+            });
+            broadcastTransactionService.setOnFailed(failedEvent -> {
+                proxyWorker.end();
+                log.error("Error broadcasting notification transaction", failedEvent.getSource().getException());
+                AppServices.showErrorDialog("Error broadcasting notification transaction", failedEvent.getSource().getException().getMessage());
+            });
+            ServiceProgressDialog progressDialog = new ServiceProgressDialog("Broadcast", "Broadcast Notification Transaction", "/image/paynym.png", proxyWorker);
+            AppServices.moveToActiveWindowScreen(progressDialog);
+            proxyWorker.setMessage("Broadcasting notification transaction...");
+            proxyWorker.start();
+            broadcastTransactionService.start();
+        } catch(Exception e) {
+            log.error("Error creating notification transaction", e);
+            AppServices.showErrorDialog("Error creating notification transaction", e.getMessage());
+        }
+    }
+
+    private void addChildWallets(Wallet wallet, PaymentCode externalPaymentCode, Transaction transaction, PayNym payNym) {
+        List<Wallet> addedWallets = addChildWallets(externalPaymentCode, payNym);
+        Wallet masterWallet = getWalletForm().getMasterWallet();
+        Storage storage = AppServices.get().getOpenWallets().get(masterWallet);
+        EventManager.get().post(new ChildWalletsAddedEvent(storage, masterWallet, addedWallets));
+
+        BlockTransaction blockTransaction = wallet.getWalletTransaction(transaction.getTxId());
+        if(blockTransaction != null && blockTransaction.getLabel() == null) {
+            blockTransaction.setLabel("Link " + (payNym == null ? externalPaymentCode.toAbbreviatedString() : payNym.nymName()));
+            TransactionEntry transactionEntry = new TransactionEntry(wallet, blockTransaction, Collections.emptyMap(), Collections.emptyMap());
+            EventManager.get().post(new WalletEntryLabelsChangedEvent(wallet, List.of(transactionEntry)));
+        }
+
+        if(paymentTabs.getTabs().size() > 0 && !addedWallets.isEmpty()) {
+            Wallet addedWallet = addedWallets.stream().filter(w -> w.getScriptType() == ScriptType.P2WPKH).findFirst().orElse(addedWallets.iterator().next());
+            PaymentController controller = (PaymentController)paymentTabs.getTabs().get(0).getUserData();
+            controller.setPayNym(payNym == null ? PayNym.fromWallet(addedWallet) : payNym);
+        }
+
+        Glyph successGlyph = new Glyph(FontAwesome5.FONT_NAME, FontAwesome5.Glyph.CHECK_CIRCLE);
+        successGlyph.getStyleClass().add("success");
+        successGlyph.setFontSize(50);
+
+        AppServices.showAlertDialog("Notification Successful", "The notification transaction was successfully sent for payment code " +
+                externalPaymentCode.toAbbreviatedString() + (payNym == null ? "" : " (" + payNym.nymName() + ")") +
+                ".\n\nYou can send to it by entering the payment code, or selecting `PayNym or Payment code` in the Pay to dropdown.", Alert.AlertType.INFORMATION, successGlyph, ButtonType.OK);
+    }
+
+    public List<Wallet> addChildWallets(PaymentCode externalPaymentCode, PayNym payNym) {
+        List<Wallet> addedWallets = new ArrayList<>();
+        Wallet masterWallet = getWalletForm().getMasterWallet();
+        Storage storage = AppServices.get().getOpenWallets().get(masterWallet);
+        List<ScriptType> scriptTypes = PayNym.getSegwitScriptTypes();
+        for(ScriptType childScriptType : scriptTypes) {
+            Wallet addedWallet = masterWallet.addChildWallet(externalPaymentCode, childScriptType);
+            addedWallet.setLabel((payNym == null ? externalPaymentCode.toAbbreviatedString() : payNym.nymName()) + " " + childScriptType.getName());
+            if(!storage.isPersisted(addedWallet)) {
+                try {
+                    storage.saveWallet(addedWallet);
+                } catch(Exception e) {
+                    log.error("Error saving wallet", e);
+                    AppServices.showErrorDialog("Error saving wallet " + addedWallet.getName(), e.getMessage());
+                }
+            }
+            addedWallets.add(addedWallet);
+        }
+
+        return addedWallets;
+    }
+
+    private void setInputFieldsDisabled(boolean disablePayments, boolean disableFeeSelection) {
         for(int i = 0; i < paymentTabs.getTabs().size(); i++) {
             Tab tab = paymentTabs.getTabs().get(i);
-            tab.setClosable(!disable);
+            tab.setClosable(!disablePayments);
             PaymentController controller = (PaymentController)tab.getUserData();
-            controller.setInputFieldsDisabled(disable);
-
-            feeRange.setDisable(disable);
-            targetBlocks.setDisable(disable);
-            fee.setDisable(disable);
-            feeAmountUnit.setDisable(disable);
+            controller.setInputFieldsDisabled(disablePayments);
         }
+
+        feeRange.setDisable(disableFeeSelection);
+        targetBlocks.setDisable(disableFeeSelection);
+        fee.setDisable(disableFeeSelection);
+        feeAmountUnit.setDisable(disableFeeSelection);
+
+        transactionDiagram.requestFocus();
     }
 
     @Subscribe
@@ -1262,11 +1448,15 @@ public class SendController extends WalletFormController implements Initializabl
 
     @Subscribe
     public void spendUtxos(SpendUtxoEvent event) {
-        if(!event.getUtxos().isEmpty() && event.getWallet().equals(getWalletForm().getWallet())) {
+        if((event.getUtxos() == null || !event.getUtxos().isEmpty()) && event.getWallet().equals(getWalletForm().getWallet())) {
+            if(whirlpoolProperty.get() != null || paymentCodeProperty.get() != null) {
+                clear(null);
+            }
+
             if(event.getPayments() != null) {
                 clear(null);
                 setPayments(event.getPayments());
-            } else if(paymentTabs.getTabs().size() == 1) {
+            } else if(paymentTabs.getTabs().size() == 1 && event.getUtxos() != null) {
                 Payment payment = new Payment(null, null, event.getUtxos().stream().mapToLong(BlockTransactionHashIndex::getValue).sum(), true);
                 setPayments(List.of(payment));
             }
@@ -1282,16 +1472,25 @@ public class SendController extends WalletFormController implements Initializabl
 
             includeSpentMempoolOutputsProperty.set(event.isIncludeSpentMempoolOutputs());
 
-            List<BlockTransactionHashIndex> utxos = event.getUtxos();
-            utxoSelectorProperty.set(new PresetUtxoSelector(utxos));
+            if(event.getUtxos() != null) {
+                List<BlockTransactionHashIndex> utxos = event.getUtxos();
+                utxoSelectorProperty.set(new PresetUtxoSelector(utxos));
+            }
+
             utxoFilterProperty.set(null);
             whirlpoolProperty.set(event.getPool());
+            paymentCodeProperty.set(event.getPaymentCode());
             updateTransaction(event.getPayments() == null || event.getPayments().stream().anyMatch(Payment::isSendMax));
 
             boolean isWhirlpoolPremix = (event.getPool() != null);
-            setInputFieldsDisabled(isWhirlpoolPremix);
             premixButton.setVisible(isWhirlpoolPremix);
             premixButton.setDefaultButton(isWhirlpoolPremix);
+
+            boolean isNotificationTransaction = (event.getPaymentCode() != null);
+            notificationButton.setVisible(isNotificationTransaction);
+            notificationButton.setDefaultButton(isNotificationTransaction);
+
+            setInputFieldsDisabled(isWhirlpoolPremix || isNotificationTransaction, isWhirlpoolPremix);
         }
     }
 

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

@@ -64,7 +64,7 @@
                         <Label text="Find Contact:" styleClass="field-label" />
                         <HBox spacing="10">
                             <CopyableTextField fx:id="searchPayNyms" promptText="PayNym or Payment code" styleClass="field-control"/>
-                            <Button onAction="#scanQR">
+                            <Button fx:id="searchPayNymsScan" onAction="#scanQR">
                                 <graphic>
                                     <Glyph fontFamily="Font Awesome 5 Free Solid" fontSize="12" icon="CAMERA" />
                                 </graphic>

src/main/resources/com/sparrowwallet/sparrow/wallet/payment.css

@@ -0,0 +1,3 @@
+#address .paynym-icon {
+    -fx-padding: 0 0 0 5;
+}

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

@@ -35,7 +35,7 @@
                     <ComboBox fx:id="openWallets" />
                     <ComboBoxTextField fx:id="address" styleClass="address-text-field" comboProperty="$openWallets">
                         <tooltip>
-                            <Tooltip text="Address or bitcoin: URI"/>
+                            <Tooltip text="Address, payment code or bitcoin: URI"/>
                         </tooltip>
                     </ComboBoxTextField>
                 </StackPane>

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

@@ -186,6 +186,11 @@
             <HBox AnchorPane.rightAnchor="10">
                 <Button fx:id="clearButton" text="Clear" cancelButton="true" onAction="#clear" />
                 <Region HBox.hgrow="ALWAYS" style="-fx-min-width: 20px" />
+                <Button fx:id="notificationButton" text="Broadcast Notification" contentDisplay="RIGHT" graphicTextGap="5" onAction="#broadcastNotification">
+                    <graphic>
+                        <Glyph fontFamily="Font Awesome 5 Free Solid" fontSize="12" icon="SATELLITE_DISH" />
+                    </graphic>
+                </Button>
                 <Button fx:id="premixButton" text="Broadcast Premix Transaction" contentDisplay="RIGHT" graphicTextGap="5" onAction="#broadcastPremix">
                     <graphic>
                         <Glyph fontFamily="Font Awesome 5 Free Solid" fontSize="12" icon="RANDOM" />