sendMessage method
Implementation
@override
Future<String?> sendMessage(String recipientAddress, dynamic message,
String authorityId, String typeId, int versionMajor) async {
await _ensureInitialized();
// Extract content bytes from the encoded message map
final contentBytes = _extractContentBytes(message, authorityId, typeId,
versionMajor);
return rust_messaging.sendMessage(
address: recipientAddress, contentBytes: contentBytes);
}