Vivoka Websocket on NodeJS

// Creating file name for path and downloading file
		let formattedDate = moment.unix(Date.now()/1000).format("DDMMYYYY-HHmmss");
		let path = "audio-temp" + formattedDate +".flac";
		await audioDownloader(path, verbatimData.val().record.urlFlac)

		// Opening File and creating base64 binary file
		const audioBase64 = fs.readFileSync(path).toString('base64')

		// Getting size of File
		const stats = fs.statSync(path)
		const fileSizeInBytes = stats.size

		let firstWs = (filesize) => {

			let payload = {
				jwt: token(), 
				version: '1.0',
				command: 'start-speech-recognition-async',
				lang: 'fr-FR',
				filesize,
				webhook: 'https://bibemus-server.herokuapp.com/webhook/?userId=' + userId + '&verbatimId=' + verbatimId
			}

			let url = 'wss://api.vivoka.com:46753/'

			const ws = new WebSocket(url);

			ws.on('open', function open() {

				ws.send(JSON.stringify(payload));

			});

			ws.on('message', function incoming(data) {
				let stringData = data.toString();
				let jsonStringData = JSON.parse(stringData)

				console.log(jsonStringData)

				if (jsonStringData.code == 0) {
					
					secondWs(jsonStringData.url, jsonStringData.stt_id)
				}

			});

		}

		let secondWs = (url, stt_id) => {

			let payload = {
				"stt_id": stt_id,
				"jwt": token(),
				"version": "1.0" 
			}

			const ws = new WebSocket(url);

			ws.on('open', function open() {
				console.log('2nd connexion has been opened')
				ws.send(JSON.stringify(payload));

				ws.send(audioBase64)
			});

			ws.on('message', function incoming(data) {
				console.log(data.toString());
			});
			
		}

		firstWs(fileSizeInBytes)

		// fs.unlinkSync(path);

		return (
			res.end()
		);