LambdaFunction.js

// Sample Lambda Function to send notifications via text when an  AWS Health event happens
'use strict';

let AWS = require('aws-sdk');
let sns = new AWS.SNS();

//main function which gets AWS Health data from Cloudwatch event
exports.handler = (event, context, callback) => {
    //get phone number from Env Variable
    let phoneNumber = process.env.PHONE_NUMBER;
    //extract details from Cloudwatch event
    let eventName = event.detail.eventTypeCode
    let healthMessage = `The following AWS Health event type has occured: ${eventName} For more details, please see https://phd.aws.amazon.com/phd/home?region=us-east-1#/dashboard/open-issues`;
    //prepare message for SNS to publish
    let snsPublishParams = {
        Message: healthMessage,
        PhoneNumber: phoneNumber,
    };
    sns.publish(snsPublishParams,(err,data) => {
      if (err) {
        const snsPublishErrorMessage = `Error publishing AWS Health event to SNS`;
        console.log(snsPublishErrorMessage, err, err.stack); // adding the err.stack
        callback(snsPublishErrorMessage);
      }

      const snsPublishSuccessMessage = `Successfully got details from AWS Health event, ${eventName} and sent SMS via SNS.`;
      console.log(snsPublishSuccessMessage, data);
      callback(null, snsPublishSuccessMessage); //return success
    });
};