Raising Billing Events from Project Milestone completion.

Summary

Raising Billing Events from Project Milestone completion.

Content

Hi,

I have a requirement where I need to Raise or create Billing events based on Project Milestone completion.

I want to achieve this through OIC(Oracle Integration Cloud).

I have created an Integration where I have subscribed Public event for milestone completion in the request and Create billing event in the Response.The issue I am facing is the mapping between this two.As the Business event is just having a Project id field which i can map to target and for creating a billing event we need contract details as well but here I am unable to map contract details to source.