How to update google play billing library to library 3 or library 4?

I received an email from google play that I have to update the google play billing library to 3 or 4 or I won't be able to update my games. Can anyone help me with how to do so?

 

What version of IAP are you using? The latest version (4.0.3) already has Google Play Billing Library v3 and has since 3.x. We will be integrating with v4 in a few months.

 

How can I tell?

 

You can update IAP via Package Manager, look for the In App Purchasing library.

 

It says version 2.0.6 and I can update to 2.2.2

 

What version of Unity? You would want Unity 2019.4 or higher, and you should see version 4.0.3 in the list of all versions.

 

2019.3.4
The highest is 2.2.2

 

That would be expected with 2019.3

 

I will update it to 2019.4 Thanks alot!

 

You're welcome! Be sure to make a full project back up before upgrading.

 

It keeps giving me an error while downloading the new version. I tried 3 times.

 

Nevermind I downloaded it from here https://unity3d.com/unity/whats-new/2019.4.31

 

1. Would you mind telling me if there is a forecast about release date of google billing v4 support?
2. Does this version require unity 2020+ or 2019 will be supported?

 

We are currently looking at Q3, and Unity 2019 likely won't be supported.

 

Thank you.