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In this video, we will create a Telegram bot to get real-time blockchain notifications in Telegram with the help of Node.js and QuickAlerts.

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The following code example includes the QuickAlerts expression for MAYC Transfers.

Expression

Deploy

1
tx_logs_address == '0x60E4d786628Fea6478F785A6d7e704777c86a7c6'
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&&
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tx_logs_topic0 == '0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef'

Following is the code sample shown in the video. You can also access the file on GitHub.

require("dotenv").config();
const express = require("express");
const TelegramBot = require("node-telegram-bot-api");


const {TOKEN, PORT} = process.env;

const bot = new TelegramBot(TOKEN);


const app = express();
app.use(express.json());

// We are receiving updates at the route below!
app.post('/webhook', async (req, res) => {
  const webhook = req.body;
  const from = webhook[0].from;
  const to = webhook[0].to;
  const token_id = Number.parseInt(webhook[0].logs[0].topics[3],16);
  const tx_hash = webhook[0].logs[0].transactionHash;

  res.sendStatus(200);

  const chatId = <TELEGRAM_CHANNEL_ID>;

  // Sends text to the above chatID
  bot.sendMessage(chatId,
    `🔔Bomber Man # ${token_id} transferred🔔\n\n From: ${from}\n\n To: ${to}\n
    https://polygonscan.com/tx/${tx_hash}`
 );

});

// Start Express Server
app.listen(PORT, () => {
  console.log(`Express server is listening`);
});

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