How to work with callback buttons in vk api?

Question

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I created callback buttons, but how to understand that a person clicked on them and the bot needs to perform an action?

Answer 1

If you read the documentation, which is probably difficult for people to do now, then it says that there WILL BE A MESSAGE WITH A PAYLOAD FIELD WHICH WILL BE THESE BUTTONS
Open the documentation at least once. She is in Russian. Everything is clearly and accessible written for each of your actions.