Implement sendPayment notification command

src/main/java/org/asamk/signal/commands/Commands.java

@@ -34,6 +34,7 @@ public class Commands {
         addCommand(new RemoteDeleteCommand());
         addCommand(new SendCommand());
         addCommand(new SendContactsCommand());
+        addCommand(new SendPaymentNotificationCommand());
         addCommand(new SendReactionCommand());
         addCommand(new SendReceiptCommand());
         addCommand(new SendSyncRequestCommand());

src/main/java/org/asamk/signal/commands/SendPaymentNotificationCommand.java

@@ -0,0 +1,51 @@
+package org.asamk.signal.commands;
+
+import net.sourceforge.argparse4j.inf.Namespace;
+import net.sourceforge.argparse4j.inf.Subparser;
+
+import org.asamk.signal.commands.exceptions.CommandException;
+import org.asamk.signal.commands.exceptions.UnexpectedErrorException;
+import org.asamk.signal.manager.Manager;
+import org.asamk.signal.output.OutputWriter;
+import org.asamk.signal.util.CommandUtil;
+
+import java.io.IOException;
+import java.util.Base64;
+
+import static org.asamk.signal.util.SendMessageResultUtils.outputResult;
+
+public class SendPaymentNotificationCommand implements JsonRpcLocalCommand {
+
+    @Override
+    public String getName() {
+        return "sendPaymentNotification";
+    }
+
+    @Override
+    public void attachToSubparser(final Subparser subparser) {
+        subparser.help("Send a payment notification.");
+        subparser.addArgument("recipient").help("Specify the recipient's phone number.");
+        subparser.addArgument("--receipt").required(true).help("The base64 encoded receipt blob.");
+        subparser.addArgument("--note").help("Specify a note for the payment notification.");
+    }
+
+    @Override
+    public void handleCommand(
+            final Namespace ns, final Manager m, final OutputWriter outputWriter
+    ) throws CommandException {
+        final var recipientString = ns.getString("recipient");
+        final var recipientIdentifier = CommandUtil.getSingleRecipientIdentifier(recipientString, m.getSelfNumber());
+
+        final var receiptString = ns.getString("receipt");
+        final var receipt = Base64.getDecoder().decode(receiptString);
+        final var note = ns.getString("note");
+
+        try {
+            final var results = m.sendPaymentNotificationMessage(receipt, note, recipientIdentifier);
+            outputResult(outputWriter, results);
+        } catch (IOException e) {
+            throw new UnexpectedErrorException("Failed to send message: " + e.getMessage() + " (" + e.getClass()
+                    .getSimpleName() + ")", e);
+        }
+    }
+}

src/main/java/org/asamk/signal/dbus/DbusManagerImpl.java

@@ -388,6 +388,13 @@ public class DbusManagerImpl implements Manager {
                         groupId));
     }
 
+    @Override
+    public SendMessageResults sendPaymentNotificationMessage(
+            final byte[] receipt, final String note, final RecipientIdentifier.Single recipient
+    ) throws IOException {
+        throw new UnsupportedOperationException();
+    }
+
     @Override
     public SendMessageResults sendEndSessionMessage(final Set<RecipientIdentifier.Single> recipients) throws IOException {
         signal.sendEndSessionMessage(recipients.stream().map(RecipientIdentifier.Single::getIdentifier).toList());