'Naming recommendations for resource to top-up, cash out and for other financial activities

I am a backend developer and I am currently working on creating a new e-wallet service.

The service will start off with basic features such as top-up, cash-out and deduction by interacting with money resources(?) like banks.

But there's also another e-wallet service in another project of my company which is also another resource you can do the same financial activities.

Therefore, it would sound a bit weird if I named the class Bank.

Since English is not my mother tongue, it takes too much time for me to come up with a proper name or it's even impossible.

Is there any proper name for this kind of thing that you can recommend?

naming bank

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