Amazon Lambda - Amazon Step Functions
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Amazon Lambda

These example templates show how Amazon Step Functions generates IAM policies based on the resources in your state machine definition. For more information, see:

Amazon Step Functions generates an IAM policy based on your state machine definition. For a state machine with two Amazon Lambda task states that call function1 and function2, a policy with lambda:Invoke permissions for the two functions must be used.

This is shown in the following example.

{ "Version": "2012-10-17", "Statement": [ { "Effect": "Allow", "Action": [ "lambda:InvokeFunction" ], "Resource": [ "arn:aws:lambda:[[region]]:[[accountId]]:function:[[function1]]", "arn:aws:lambda:[[region]]:[[accountId]]:function:[[function2]]" ] } ] }