Just trick your friend to connect his phone to your PC via USB cable and then steal a file. Takes only 2 minutes.
Borrow your friend’s phone for few minutes
.Connect it to your computer via USB.
Go to folder named WhatsApp/DatabasesTwo
files are there named
Copy them to your computer . Rename that file from “msgstore-YYYY-MM-DD.1.db.crypt” to “msgstore.db.crypt”
If the file is called “msgstore-YYYY-MM-DD.1.db.crypt5”, rename it to “msgstore.db.crypt5”