How to make a withdrawal to a bank card in the application?

Question

Android

Hello!
I often see projects where it is necessary to connect the withdrawal of money earned by the user to the card. For example, an application where a user provides cargo transportation services and has his own personal account in the application with a balance of earned money.
I am a programmer myself, so I do not know the financial nuances. How do automated (and legal, "white hat") withdrawals usually take place? Especially when there are a lot of users in the application.

Answer 1

1) You must have money somewhere.
2) This "somewhere" provides an API for managing money.
3) Your application simply gives a command to your server.
4) Your server accesses the API of the payment system where you have money.
5) Payment system and makes a transfer at your request.
As an option, instead of an API, it can be a live person, who simply presses buttons on the list of payments in the personal account of the bank / payment system.
In order to do this, you need to study the payment systems available on the market:
Which of them has a convenient API, which of them allows you to withdraw money using the exact method you need - to the card. Which of them will suit you with the cost of services.
Examples of payment systems:
Yandex.Money, Cyberplay, Payoneer, etc.