AWS Lambda function that publishes to SNS

lambda.js

var AWS = require("aws-sdk");

exports.handler = (event, context, callback) => {
    var sns = new AWS.SNS();
    sns.publish({
        Message: 'YOUR MESSAGE HERE', 
        Subject: 'YOUR SUBJECT HERE',
        TopicArn: 'YOUR SNS TOPIC ARN HERE'
    }, function() {
        callback(null, {
            'statusCode': 200, 
            'headers': {}, 
            'body': null
        });
    });
};