Remove an item from step function output - json

Question

When passing inputs from one state to another, is there a way to remove a particular Key-value from the input event?
For example:
I need to remove CurrentSubAccountChunkResults key and value from the input before passing it to the next state of the step function.
I read I could specify Parameters to filter out.
Rather than specifying all the parameters I need , I am trying to find a way to remove what I do not need in the input and pass the rest to the next state.
Could someone help me with any ideas they might have?
{
"Item1": { item: No1, item: No2 },
"Item2": "iam-item2",
"Item3": 3,
"Item4": { item: No4, item: No5 },
"CurrentSubAccountChunkResults" : { "result1": "iam-result1" },
"VerificationResults": { "final-result1": "iam-result1" }
}

Answer 1

I believe your options are:
A Lambda task to remove unwanted keys and values
Two pass tasks to redact values, but not the keys
Here's the non-Lambda option. The first Pass task adds the "private" key names you want to redact. The second Pass uses the JsonMerge intrinsic function to merge payload and private.
{
"StartAt": "AddPrivateFields",
"States": {
"AddPrivateFields": {
"Type": "Pass",
"Parameters": {
"payload.$": "$",
"private": {
"CurrentSubAccountChunkResults": null
}
},
"Next": "Redact"
},
"Redact": {
"Type": "Pass",
"Parameters": {
"redacted.$": "States.JsonMerge($.payload, $.private, false)"
},
"End": true
}
}
}
If the two objects in the merge function ("States.JsonMerge($.payload, $.private, false)") share keys, the values in the second will take precedence. This sets the private keys to null in the output:
{
"redacted": {
"CurrentSubAccountChunkResults": null,
"Item1": {
"item": "No1",
"item2": "No2"
},
"Item2": "iam-item2",
"Item3": 3,
"Item4": {
"item": "No4",
"item2": "No5"
},
"VerificationResults": {
"final-result1": "iam-result1"
}
}
}