Copy Epic field named " Cost" to work package associated with this epic

Question

We are using Jira 7.3, we have a requirement to copy "cost" field of epic, to new or associated work package with this epic, so that the value of the "Cost" field given in epic is copied to its associated work package if that field is empty here

Any help or reference or script

unknown · Answer

Can you please help me with the code as I am new to this and would be creating the listener for the first time or guide me where i can check for the documentation which i can check and learn

Nic Brough -Adaptavist- · Answer

>an Epic is selected in a work package

That mandates a listener then.  Start at https://scriptrunner.adaptavist.com/latest/jira/listeners.html - you'll want it to catch issue created and updated events.

unknown · Answer

Well I need :- When a new work package is created for an Epic or an Epic is selected in a work package the Cost  Field should be copied over if the work package field Cost  is empty.