How do I output original input of a state in a step function?

Question

I have a step function with the following definition:

{
  "StartAt": "A",
  "States": {
     "A": {
        "Type": "Task",
        "Resource": "do something",
        "Next": "B"
     },
     "B": {
        "Type": "Task",
        "Resource": "do something",
        "End": true
     }
  }
}

The problem is the input for the state B. I need it to be the same as the input for the state A. Currently however the input for the step B is the output of the step A. Taken into account that step A in fact calls a different step function or performs a DynamoDB operation (no lambda involved), there's not much I can do about the output of that step, but the step B still needs to receive the same input as step A originally did. How can I define this?

Answer 1

Set ResultPath: null in state A to discard the result and leave the state unchanged.