Trying to automate Child Link creation based on Epic Link

[Tammy Lanius]

I would like to automate creating a link for a Story/Task based on the value in the Epic Link. We use both Structure and Advanced Roadmaps so we need both the Epic Link (and Parent Link for other issues in the hierarchy). Here are the steps that I am trying to automate:

1. Story is created and the Epic Link is populated
2. Create an issue link using "IsChildOf" the issue populated in the Epic Link

OR

1. Story is updated and the previously-empty Epic Link is populated
2. Create an issue link using "IsChildOf" the issue populated in the Epic Link

I would greatly appreciate any help that can be given. I have searched everywhere for examples of this type of automation with no luck!