viber/bot-node

@Zuten
Hi guys.
I have a web server with viber bot in it. But to use it I need SSL certificate, so I installed the certbot from LetsEncrypt and made request for my domain bot.tke.ck.ua. Certbot said "congrats", and so I pasted the path for certs in server httpsOptions:

const https = require('https');
const port = 80;

// Viber will push messages sent to this URL. Web server should be internet-facing.
const webhookUrl = 'bot.tke.ck.ua';

const httpsOptions = {
key: fs.readFileSync('C:/Certbot/live/bot.tke.ck.ua/privkey.pem'),
cert: fs.readFileSync('C:/Certbot/live/bot.tke.ck.ua/cert.pem'),
ca: fs.readFileSync('C:/Certbot/live/bot.tke.ck.ua/fullchain.pem')
};

const server = https.createServer(httpsOptions, bot.middleware()).listen(port, () => bot.setWebhook(webhookUrl))

But after running the server I'm only getting a lot of node exceptions:

[nodemon] starting node viber_bot.js
(node:3132) UnhandledPromiseRejectionWarning: #
(Use node --trace-warnings ... to show where the warning was created)
(node:3132) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag --unhandled-rejections=strict (see Command-line options | Node.js v15.11.0 Documentation 1). (rejection id: 1)
(node:3132) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

In other hand, whem I'm using ngrok for SSL, there is no problem.

What I'm doing wrong, and what I need to do?
@Zuten
Even when I copied the code from documentation and pasted certs to node app folder I have the same problem. Code:

const ViberBot = require('viber-bot').Bot;
const BotEvents = require('viber-bot').Events;
const fs = require('fs');

console.log("Const set");

const bot = new ViberBot({
authToken: "",
name: "Бот",
avatar: "" // It is recommended to be 720x720, and no more than 100kb.
});

console.log("Bot created");

// Perfect! Now here's the key part:
bot.on(BotEvents.MESSAGE_RECEIVED, (message, response) => {
// Echo's back the message to the client. Your bot logic should sit here.
response.send(message);
});

console.log("Bot function on message receive, working");

// Wasn't that easy? Let's create HTTPS server and set the webhook:
const https = require('https');
const port = process.env.PORT || 8080;

console.log("Https set");

// Viber will push messages sent to this URL. Web server should be internet-facing.
const webhookUrl = 'bot.tke.ck.ua';
const privateKey = fs.readFileSync('cert/privkey.pem', 'utf-8');
const certificate = fs.readFileSync('cert/cert.pem', 'utf-8');
const caChain = fs.readFileSync('cert/chain.pem', 'utf-8')

console.log("Obj httpsOptions inner defined");

const httpsOptions = {
key: privateKey,
cert: certificate,
ca: caChain
}

console.log("httpsOptions set");

// Trusted SSL certification (not self-signed).
https.createServer(httpsOptions, bot.middleware()).listen(port, () => bot.setWebhook(webhookUrl));
console.log("Server started");