Lambda Process SNS pubs generated from SES events

lambda_sns_ses.js

const AWS = require('aws-sdk');
const EVENTS = new AWS.DynamoDB({ region: 'us-east-1', apiVersion: '2012-10-08' });
exports.handler = (event, context, callback) => {
    var done = function(response) {
        callback(null, response);
    };
    var message = JSON.parse(event.Records[0].Sns.Message);
    var params = {
        TableName: "ses-events",
        Item: {
            "messageId": { S: message.mail.messageId },
            "eventType": { S: message.eventType },
            "timestamp": { S: message.mail.timestamp },
            "from": { S: JSON.stringify(message.mail.commonHeaders.from) },
            "to": { S: JSON.stringify(message.mail.commonHeaders.to) },
            "subject": { S: message.mail.commonHeaders.subject },
            "eventInfo": {S: JSON.stringify(message[message.eventType.toLowerCase()])}
        }
    };
    console.log(params);
    EVENTS.putItem(params, function(err, data) {
        if (err) {
            console.log("Unable to add item. Error JSON:", JSON.stringify(err, null, 2));
            done({ error: 'Error' });
        }
        else {
            console.log({ message: 'Created ' + message.mail.messageId });
            done({ message: 'Created ', messageId: message.mail.messageId });
        }
    });
};