If I'm the service that needs a payment, then it is up to me to make sure it happens. If it doesn't, then I need to deal with that, because that's something tha

If I'm the service that needs a payment, then it is up to me to make sure it happens. If it doesn't, then I need to deal with that, because that's something that can happen with a payment. So if I don't hear from the payment that it has been initiated, then I have to go on the basis that I can't get a payment. But I also don't get to tell the payment how to deal with its internal activities, I don't want to know about it retrying, or working out which payment provider to use etc. Objects arent FiniteStateMachineManagerFactories. They're actual things that your system is built to handle. If an object needs an FSM, it'll get one, just like cells have mitochondria.