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@grammyjs/validator
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This package solves two problems at once:
Deno: import from this URL: https://deno.land/x/grammy_validator/mod.ts
Node.js: npm install @grammyjs/validator
Web Bots can get access to window.Telegram.WebApp.initData
which must be sent to the server for validation.
The string value of initData
is a query string that you can simply append to a URL to fetch.
Example:
const url = "https://grammy.dev?" + window.Telegram.WebApp.initData;
await fetch(url);
This library helps you validate the resulting search query in the backend.
import { validateWebAppData } from "./src/mod.ts";
const token = ""; // <-- put your bot token here
const url = ctx.request.url; // get `URL` object from your web framework
if (validateWebAppData(token, url.searchParams)) { // pass `URLSearchParams` object
// data is from Telegram
}
You can also check the signature if you are using a Telegram Login Widget.
import { checkSignature } from "./src/mod.ts";
const token = ""; // <-- put your bot token here
const payload = {
id: "424242424242",
first_name: "John",
last_name: "Doe",
username: "username",
photo_url: "https://t.me/i/userpic/320/username.jpg",
auth_date: "1519400000",
hash: "87e5a7e644d0ee362334d92bc8ecc981ca11ffc11eca809505",
};
if (checkSignature(token, payload)) {
// data is from Telegram
}
FAQs
Validation logic for Telegram Web Bots and Login Widgets
The npm package @grammyjs/validator receives a total of 60 weekly downloads. As such, @grammyjs/validator popularity was classified as not popular.
We found that @grammyjs/validator demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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