z0eY2NnW

1const qs = require('querystring');
2const crypto = require('crypto');
3
4const urlParams = qs.parse(URL_PARAMS);
5const ordered = {};
6Object.keys(urlParams).sort().forEach((key) => {
7    if (key.slice(0, 3) === 'vk_') {
8        ordered[key] = urlParams[key];
9    }
10});
11
12const stringParams = qs.stringify(ordered);
13const paramsHash = crypto
14    .createHmac('sha256', secretKey)
15    .update(stringParams)
16    .digest()
17    .toString('base64')
18    .replace(/\+/g, '-')
19    .replace(/\//g, '_')
20    .replace(/=$/, '');
21
22console.log(paramsHash === urlParams.sign);