Re: Submission: The project already developed by using SteamVR plugin ...
You'd likely want to include the Viveport SDK to make use of the integrated DRM but can submit your Steam build without any further alterations, although any functionality based upon the Steamworks SDKs may be affected. The Viveport SDK does have things like IAP and we're working on developing the SDK's core offerings. If you don't integrate the Viveport SDK, a wrapper based DRM method will be applied. I'm happy to help connect you to a member of our content team who can walk you through the process.
To reach Viveport's customer service team, email firstname.lastname@example.org
To connect with a live support agent for hardware support, go to www.vive.com/support, click on "contact us" in the top righthand corner, and then opt to speak with a Live Chat agent David R
Technical Specialist - San Francisco, CA; Monday-Friday