This mechanism is suitable for merchants who need a simple and fast payment integration. The client himself chooses the cryptocurrency, which he will pay with, and after payment the amount will be exchanged for bitcoin, bitcoins will be credited to the merchant's account.
This mechanism is suitable for large merchants who need deep integration with a payment gateway. The buyer will be able to choose the cryptocurrency that is more convenient for him to pay and will make the payment. After clicking the button, the invoice will be sent to the server.