Алгоритм работы

Пример обработчика POSTBACK

JavaScript

import express from "express";

const app = express();

app.use(express.json());

app.use(express.urlencoded({ extended: true }));

app.post('/webhook', (req, res) => {
    const { event, user_id } = req.body;

    switch (event) {
        case 'client.expires':
            return res.json({ message: 'Client ' + user_id + ' expired' });
    }
});

app.listen(3000, () => console.log('Server is running on port 3000'))

Second Tab