How to check which message was sent before Node.js?

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How can I check which message was sent before, for example, the user clicked on the "Top up balance" button, after which he entered the amount, for example, 200. How can I determine if the user really clicked on the top up button before or just wrote 200?

Answer 1

in short, I figured it out, when the command to replenish the balance, a global variable is set, that the previous command was to replenish the balance, well, everything is already clear and understandable there)