When you hit the “Place Order” button, that event triggers a series of steps, including inventory reservation, payment processing, and shipping initialization. Now, suppose your card is charged by the payment service (Stripe 🤔), but the API call to the third-party shipping service failed. Modern systems don’t live inside a single database anymore. You can’t … Read more
For a durable Lambda function, standard errors at any step are checkpointed and handled during the next replay by retry-strategy configurations. However, there can be scenarios where a durable step starts execution but fails to complete, while also leaving no ERROR checkpoint behind. A common example is a Lambda execution timeout. In such cases, step … Read more
Some time ago, I was building a chat application using AWS Websocket API gateway. Things were going smoothly. I created a WebSocket API Gateway, added $connect, $disconnect, and sendMessage/addGroup routes. From the frontend (React) side, everything was fire-and-forget. You send a message, and the onMessageHandler takes care of it 💪🏼 But then a new requirement … Read more
In this hands-on tutorial, we will see how to create JWT using AWS KMS Asymmetric Key. Step 1: Create Base64-URL Encoded JWT Header & Payload Step 2: Create String to Sign Step 3: Hash the Data Step 4: Sign with AWS KMS Step 5: Generate JWT GitHub:- https://github.com/TrickSumo/AWS-KMS-Course?tab=readme-ov-file#asymmetric-encryption-example—create-jwt Thanks 🌿
AWS Key Management Service (KMS) is used to create, manage, and audit cryptographic keys. In this hands-on course, we’ll break down core KMS concepts and implement two mini projects to bring theory into practice. Prerequisites To follow the mini-projects confidently, you should know how to build a basic serverless CRUD app: Course Structure – What … Read more
Chatlings 🐾 is a serverless, real-time chat platform designed for children aged 8–14. It ensures content safety using AI moderation and a delightful, kid-friendly design. Just like ducklings 🦆 follow their guide while learning to explore the world, Chatlings helps young users explore digital conversations safely and responsibly. ✨ Key Features 💬 Real-time Group ChatUsers … Read more
In this post, we will understand how to use AWS CloudFront restricted access settings (signedCookies and signedURLs) to secure access to S3 objects. When we use S3 with CloudFront (and OAC), by default, all objects are publicly accessible over the internet. There is not control on who can access which object. Imagine a scenario, where … Read more
Spring is the season of nature’s greenery, blooming flowers, and buzzing insects. There are millions and trillions of species of flora and fauna. Often, we come across something mesmerizing but don’t know what it is! To solve this mystery, Spring Pokédex comes to the rescue. This blog post dives into how the Spring Pokédex works … Read more
Finally, a long-awaited feature of AWS Cognito is here. Now, Cognito user pools support the rotation of refresh tokens. In this post, we’ll understand what has changed and how to implement it in your projects. What is a Refresh Token? And What Was the Problem? After successful user authentication, the Cognito user pool returns an … Read more
In this tutorial, we will use AWS services to create a serverless application for a coffee shop. The user (coffee shop owner in this case) can authenticate using AWS Cognito and manage inventory (perform CRUD operations). Github Repo: https://github.com/TrickSumo/AWS-CRUD-Serverless Why Serverless? AWS-managed serverless services like Lambda, Cognito, and Api gateway scale down to zero when … Read more