Tell me more about authorization in Sberpay from a frontend perspective.

Authorization in Sberpay on the frontend usually involves several steps:

1. Initiation of payment or login: the user selects payment via Sberpay.
2. Redirection or SDK call: the frontend calls the Sberpay API or uses their SDK to start the authorization process.
3. User authentication: the user enters data in the Sberpay interface (login, password, biometrics).
4. Token receipt: after successful authorization, Sberpay returns an access token or payment confirmation.
5. Token transfer to the server: the frontend sends the received token to the backend for validation and completion of the operation.

From a frontend perspective, it is important to:

• Store and transmit tokens securely.
• Handle errors and authorization statuses.
• Ensure a user-friendly UX, minimizing the number of transitions.

OAuth 2.0 or similar protocols are often used, where the frontend acts as an intermediary between the user and the Sberpay service.