How to work with payment gateways?

Question

CMS

Hello. The question itself is in the title. I want to learn how to work with payment gateways / systems, please advise articles or manuals.
For example, there is a conditional Wordpress and a Visa / MasterCard payment system or some kind of intermediary like LiqPay with its own APIs. How to automate the process: a person will pay for the goods -> the status is displayed in the CMS admin panel. I would like to read something about the organization of receiving payments.

Answer 1

Often, for popular cms, payment systems create plugins, and if you want to feel everything yourself, go and read the payment system api documentation

Answer 2

https://www.robokassa.ru/ru/HowTo.aspx
and the same in others, advcash, etc.

Answer 3

Do you have a question about how to work?
And why do you need to read about the mechanism? I would have asked so!!))
In your WordPress for selling goods there is a woocommerce, for woocommerce there is a Robokassa plug-in, set it, drive in three parameters and you accept payments !!)))
This is how you need to work with the payment gateway.
Or what is the question?)))
ALL payment processors work according to the same type of scheme
1. transfer the buyer to their page, simultaneously receiving the necessary data (amount, order number, ...)
2. show the buyer a form
3. receive data from the buyer
4. loot debited / not debited - they send an encrypted response to your server, there is a script at the address specified in the settings that waits for this encryption, depending on it, the order receives a different status, then according to the logic of the store
5. The customer is shown OK or VAYVAY, etc.

Answer 4

And why do you need to read about the mechanism?

1. transfer the buyer to their page, simultaneously receiving the necessary data (amount, order number, ...)
2. show the buyer a form
3. receive data from the buyer
4. loot deducted / not debited - they send an encrypted response to your server, there The address specified in the settings is served by a script that waits for this encryption, depending on it, the order receives a different status, then according to the logic of the store
5. the customer is shown OK or VAYVAY, etc.

This is exactly what I'm interested in. How to learn how to accept and process these requests without Woocommerce and plugins. I would like to understand the mechanism itself, how it works, to get basic knowledge, so that later I can work with the API and, roughly speaking, make my own Woocommerce with ... well, you understand :)