Hi, i have a process that updates an application status when a payment process (external system) is completed, however what i don't understand is that how  "Wait for External System" works on a smartobject.

What i know is that it pauses your workflow and to continue it you can use the API to finish the event, but what i want to know is the inner workings on the activity. Does it Execute the SMO method FIRST? or after i execute the finish event it will then Execute the SMO method? since this SMO updates a field in a table i don't want to disrupt the flow as much as possible

Thanks