How to implement e-wallet system in rails?

I will be working on a booking system where user can pay booking with wallet credits. User can load credits via paypal payment. Is there any existing gem or project doing this? Any pointers would be much appreciated.

Also looking to build the same. Did you find anything?

First, create a secure database that will be utilized to manage user accounts and transactions. Then, you will leverage the security offered by Rails on sensitive data by probably adding payment gateways such as Stripe or PayPal to complete money transactions. Ensure that the interface is user-friendly and allows access to money management, transaction histories, and adding/removing money.