Aws rekognition lambda - read image from encoded image using base64

aws-rekognition-decode-image64.js

const AWS = require('aws-sdk');
const rekognition = new AWS.Rekognition();

//Analyze image.
const analyzeImg = (image) => rekognition.detectFaces(image).promise();

//Decode image.
const decodeImage = (image64)=>{

  return {
    Image: {
      Bytes: new Buffer(image64, 'base64')
    },
    Attributes: ['ALL']
  };

}

const validatRequest = (body)=>{

  const {
  	userId,
  	image
  } = body;

  if (!(userId&&image))
  	throw {code:404,error:'Bad request'};

  return true;

}

exports.handler = async (event) => {

	try {

	  const request = JSON.parse(event.body);

		validatRequest(request);

	  const {
	  	userId,
	  	image
	  } = request;

	  const decodedImage = decodeImage(image);
	  const result = await analyzeImg(decodedImage);

	  console.info(result);

	  return {
	  	statusCode:200,
	  	body:JSON.stringify(result)
	  };

	} catch(err){

		console.error(err);

		return {
			statusCode:500,
			error:JSON.stringify(err)
		}

	}

};