WhatsApp is testing new feature lets you add contacts via QR codes
According to The Verge, WABetaInfo reports, WhatsApp is testing a new feature on its beta version lets you add contacts via QR codes. Feature Available on WhatsApp's Beta Version on Both Android and IOS Platforms. May be this feature Shown in App's Setting menu, where there are options to display your own code in additional to Scan other's Code. A QR code can be revoked if it will get shared with somebody who you don’t want to have your number.
New Features is a Common Feature, but adding Contacts on WhatsApp in painful. This service depends on adding a new contact to your phone's address book, Makes you an annoying extra step just to be able to message someone in WhatsApp.
The feature is currently available in beta Version only, Not Confirm When will Come in Main App. Click on This Link and Join WhatsApp beta Version And This Feature.