Unhandled promise rejections are deprecated

[XNinety9]

Hi there.

I've been using dialogflow-fulfillment-nodejs library for a few days now, so far, so good.

But when trying to request data from an external API within the fulfillment handler, I've been facing a tenacious error:

(node:67018) UnhandledPromiseRejectionWarning: Error: No responses defined for platform: DIALOGFLOW_CONSOLE
    at V2Agent.sendResponses_ (/Users/x99/Documents/Repositories/PROJECT/functions/node_modules/dialogflow-fulfillment/src/v2-agent.js:243:13)
    at WebhookClient.send_ (/Users/x99/Documents/Repositories/PROJECT/functions/node_modules/dialogflow-fulfillment/src/dialogflow-fulfillment.js:505:17)
    at /Users/x99/Documents/Repositories/PROJECT/functions/node_modules/dialogflow-fulfillment/src/dialogflow-fulfillment.js:316:38
    at processTicksAndRejections (internal/process/task_queues.js:93:5)
    at emitUnhandledRejectionWarning (internal/process/promises.js:168:15)
    at processPromiseRejections (internal/process/promises.js:247:11)
    at processTicksAndRejections (internal/process/task_queues.js:94:32)

Here's the code:

const { response } = require('express');
var https = require ('https');

function httpRequest(params, postData) {
	return new Promise(function(resolve, reject) {
		var req = https.request(params, function(res) {
			// reject on bad status
			if (res.statusCode < 200 || res.statusCode >= 300) {
				return reject(new Error('statusCode=' + res.statusCode));
			}
			// cumulate data
			var body = [];
			res.on('data', function(chunk) {
				body.push(chunk);
			});
			// resolve on end
			res.on('end', function() {
				try {
					body = JSON.parse(Buffer.concat(body).toString());
				} catch(e) {
					reject(e);
				}
				resolve(body);
			});
		});

		// reject on request error
		req.on('error', function(err) {
			// This is not a "Second reject", just a different sort of failure
			reject(err);
		});

		if (postData) {
			req.write(postData);
		}

		// IMPORTANT
		req.end();
	})
	.catch(function (error) {
		console.error("Promise rejected");
	});
}

exports.howManyTasks = function(agent) {
	console.log("[INFO] howManyTasks");
	
	const host = "myapihost.com"
	const path = "/api/users/myusertoken/task_lists";
	const bearerToken = "mybearertoken";
	
	var params = {        
        hostname: host,
        port: 443,
        path: path,
        method: 'GET',
        headers:{
            Authorization: ' Bearer ' + bearerToken            
       }
	};

	httpRequest(params).then(function(body) {
		console.log(body);
	})
	.catch(function () {
		console.error("Promise Rejected");
	});

	console.log("[INFO] I'm out!");
}

From what I see in the logs, the error comes from the library itself? Knowing that beyond the error, my code successfully retrieves the needed data from the API.

[DIALQGUE]

I have this error too, my code worked before when I deploy it. But after few hours (or other trigger, I don't know for sure) Dialogflow fulfillment's requests have changed and now it come with "originalDetectIntentRequest" field. And I stuck here for 3 days.

Are you found any solution for this? Or alternative library to use with dialogflow fulfillment? Since this library is deprecated.