Chingari’s 50-member tech team formed over a couple of years built the first social media platform that rewards its Content Creators and Users for earning passive income through Crypto. Gari service and Transaction Sync service are the primary services responsible for blockchain integration. High-level Architecture for Blockchain integration: Gari Service’s…

Data corruption in case of system crashes, power failures, and other errors is a nightmare in real production systems with heavy traffic. We will see how Atomicity and Transactions will solve this problem with the example below. We will make a simple ticket booking system with a high chance of…

One of the basic concepts for node js developers is understanding race conditions. Let's make a simple API that registers users for a newsletter to understand race conditions. The only requirement is user should be able to register only once. We will use Node js, Express js, and MongoDB for…

Basic operations on Solana using web3 js. Libraries: var web3 = require('@solana/web3.js'); var splToken = require('@solana/spl-token'); Connection and generating keypairs: const connection = new web3.Connection( web3.clusterApiUrl('testnet'), 'confirmed', ); // generate keypair var fromWallet = web3.Keypair.generate(); var toWallet = web3.Keypair.generate(); Get balance:

Promises and callbacks are very basic concepts and every javascript developer should know the difference. Let's try to understand with a small example: someWork() is a function that is going to take roughly around 2 seconds and we want to execute otherWork() function once someWork() is done. This can be achieved using a Callback or Promise. Callback

AWS IoT Core is a highly scalable platform for IoT devices. I automated the creation of Certificates, Things, and Attaching policy using AWS SDK with the below steps. Step 1: I created an IAM user with programmatic access and attached the AWSIoTFullAccess policy.

As Software Architect at Code B, Every month I work on a few MVP(Minimum Viable Product) applications using the MEAN/MERN stack and always want them to be ready for sudden traffic. Below is the most common stack I use for scalable deployment. Authentication The best practice is to not develop this…

demo: https://ag-grid-tree.codeb.online ag-grid is a feature-rich library and I have used it on many projects. I was working on POC for 1 project and we needed to represent tree data inside the table. tree-data can be easily achieved using enterprise edition, but since it was just a POC I tried…

Let's make service using node js to create ‘QR codes’(CPU intensive task) to understand how can we use C++ for optimizations. Results for generating 10000 Qr Codes: C++ single thread:2960.125ms Nodejs: 19180.051ms Node js code to generate QR codes: