Self-Hosted Vessel Email Alert... Note

Self-Hosted Vessel Email Alerts with AWS Lambda and SES

This text details how to set up email alerts for VesselAPI webhooks using AWS services. The core idea is to transform webhook notifications into emails, prioritizing email for human readability. The process involves verifying an email address in SES and setting up a project with handler.py and render.py. The project utilizes an API Gateway, Lambda functions, DynamoDB, and SES to send emails. Crucially, it emphasizes security with HMAC signature verification and idempotency to prevent duplicate emails. The Lambda function handles signature validation, deduplication using DynamoDB, email rendering based on event types, and sending emails via SES. The `render.py` file defines different ways to format the events into readable email notifications. The cost is low until it's used. Finally, the text highlights the importance of `hmac.compare_digest` for secure signature verification and idempotency for retry handling.
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