> after having built N billing portals in the past Quick question. Any recommendations for a "wallet library" for a web-app side project (either JS or Java bac

> after having built N billing portals in the past Quick question. Any recommendations for a "wallet library" for a web-app side project (either JS or Java backend) ? Basically we want to take payments from users, charge the wallet for certain operations, and show history and balance. I am not even sure what to google to find this. Any pointers appreciated.