Very interesting Ana. With the kind of following WhatsApp has and especially in the number of active users, its indeed a great opportunity to introduce Payments which we all use or likely to use a lot in our lives.
I didn’t quite understand the “Your Balance”, is it fetching from my Bank or is it the Balance I need to pay or the Balance I am due to get?
Payment Group is great as a lot of use-cases where we need to split a bill originates in a group, for example, if I want to organise a friends lunch, I am likely to create a group to plan the details and in the end the splitting of bill can happen and the group can be closed.
What will also be good is to show in some way, whether I owe this person or the person owes me against the Name itself.
With a lot of Business happening on WhatsApp, very interesting times for WhatsApp and for us as users in times to come.