/card-expiration-notifier

Serverless card expiration notifier

Primary LanguageJavaScriptMIT LicenseMIT

Omise card expiration notifier

A sample AWS lambda code to check and notify expiring cards

Setup

  1. install dependencies:

    npm install

  2. compress this directory:

    zip -r ../card-expiration.zip *

  3. Upload compressed code created in the previous step to AWS lambda

  4. Make an email template using keywords: name, month, year, months_til_expiration, card_id save it (overwrite it) to notification_email_template.json and upload it to AWS.

    aws ses create-template --cli-input-json file://notification_email_template.json

  5. Set environment variable OMISE_SECRET_KEY to your secret key

  6. Change Source in createEmailParam and remaining_months_threshold in extractExpiringCards in index.js appropriately.

Notes

  • After a card is notified of it's expiration, the card ID is registered in the owners (account that the card is associated with) metadata by a key named notified_expiration. This key's value is an array so the newly notified card ID would be appended to this array. When updating a card you have to clear it from this array to enable monitoring for expiration again.
  • AWS SES allows a maximum of 50 address to send at a time. Therefore if the number of cards to notify exceeds this number, you must change the code or run this code multiple times.
  • The sample email in this repo notification_email_template.json might not be suitable as a notification email. You should customize it before registering it on AWS SES.