[Support] Is there any way to overcome this issue ? [13699]

[amongus2021]

I have a system that uses fastdds to communicate with sub-applications, the Client application is used to populate data and the other application (Engine) processes the calculation.

So, the Client application registers topics to publish and subscribe the data. So in the Client application, there is a function called getBalanceInUSD() which return the balance in USD , and the Engine will receive the request and send back the value to the client application.

double getBalanceInUSD(double balancePHP)
{
  // publish the request using fastdds
  .
  .
  .
  .
  return balanceUSD;
}

So the client application sends a request to Engine using a publisher(RequestPHPToUSD Topic) to with balance in PHP(Philippine peso), then the Engine is already subscribed for RequestPHPToUSD to topic to receive the data and do the conversion. Then the Engine sends the converted data back to the client application using a publisher event (RetrievePHPToUSDTopic ). The client application subscribed to that topic to retrieve the USD convert data.

My question is how i can use the above method(double getBalanceInUSD(double balancePHP)) to return the received data ?
Since the subscriber event is not return data to the double getBalanceInUSD(double balancePHP) method?