Using AWS step function with a wait state

Question

I have a requirement where a client submits a job which I would like to execute after 1 hour. For this I am planning to follow the below design:

1. Create a AWS Step function (Standard workflow) with 2 state transitions. First is a Wait state which will simply wait for 1 hour and then the second state invokes a lambda function which emits an event to an AWS event bridge.
2. Once the event is emitted to event bridge further processing performed.

In this design, my question is whether I will be charged for the 1 hour wait time I have in the Wait state. Is my understanding that this is not charged and only 2 state transitions per workflow execution is charged?

Answer 1

Correct. Standard Workflows are priced only on the number of "State transitions".

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Pricing is different for Standard and Express workflows. Use the AWS Pricing Calculator to compare costs for your use case:

Standard Workflows

• State transitions: A state transition is counted each time a step in your execution is completed.

Express Workflows

• Duration: Duration is calculated from the time your workflow begins executing until it completes or otherwise terminates, rounded up to the nearest 100 milliseconds.
• Memory: Memory consumption is based on the size of a workflow definition, the use of map or parallel states, and the execution (payload) data size.