How to send a voice note file to a Telegram group in Node.js

group-send-telegram-opus.js

#!/usr/bin/env node

var http = require('http');
var fs = require('fs');

// Put down your own client ID and secret here:
var instanceId = "YOUR_OWN_GATEWAY_INSTANCE_ID";
var clientId = "YOUR_OWN_CLIENT_ID";
var clientSecret = "YOUR_OWN_SECRET_ID";

var jsonPayload = JSON.stringify({
    group_name: "Muscle Men Club",  // TODO: Specify the group name here. 
    group_admin: "19159876123",  // TODO: Specify the number of the group admin here.
    voice_note: fs.readFileSync("../assets/martin-luther-king.mp3").toString('base64'),  // FIXME
    filename: "anyname.opus", // FIXME
    caption: "I have a dream"  // FIXME
});

var options = {
    hostname: "api.whatsmate.net",
    port: 80,
    path: "/v3/telegram/group/voice_note/message/" + instanceId,
    method: "POST",
    headers: {
        "Content-Type": "application/json",
        "X-WM-CLIENT-ID": clientId,
        "X-WM-CLIENT-SECRET": clientSecret,
        "Content-Length": Buffer.byteLength(jsonPayload)
    }
};

var request = new http.ClientRequest(options);
request.end(jsonPayload);

request.on('response', function (response) {
    console.log('Heard back from WhatsMate Telegram Gateway:\n');
    console.log('Status code: ' + response.statusCode);
    response.setEncoding('utf8');
    response.on('data', function (chunk) {
        console.log(chunk);
    });
});

Write-up: https://whatsmate.github.io/2022-06-29-send-telegram-group-voice-note-nodejs-javascript/