AWS Lambda email parser

var AWS = require("aws-sdk");
var simpleParser = require("mailparser").simpleParser;

var s3 = new AWS.S3();

exports.handler = async (event, context, callback) => {
    console.log("Invoked Lambda");
    const mail = event.Records[0].ses.mail;

    console.log("Mail");
    console.log(JSON.stringify(mail));

    var getParams = {
        Bucket: "disposible-mails-bucket",
        Key: "awesome_crypto_me/" + mail.messageId,
    };
    let emailFromS3 = await s3.getObject(getParams).promise();
    let parsedEmail = await simpleParser(emailFromS3.Body);

    console.log("parsedEmail Subject: "  + parsedEmail.subject);
    console.log("parsedEmail Body: " + parsedEmail.textAsHtml);
    
    callback(null);
};