Nodejs Programming Tutorials, Guides & Best Practices

Protect your API from abuse and learn how rate limiting works under the hood.

When developing web apps or APIs, it’s critical to prevent users from overwhelming your server. That’s where rate limiting comes in. In this guide, we’ll build a custom rate limiter in Node.js using Redis—no libraries, no magic, just code you control and understand.

    const crypto = require('crypto');
    const randomBytes = crypto.randomBytes(32);
    console.log(randomBytes.toString('hex')); // Prints a 32-byte random hex string

• ethers.randomBytes:
• Library: ethers.randomBytes is provided by the ethers.js library, a popular JavaScript library for Ethereum development. You need to install and include ethers.js as a dependency in your project to use this function.
• Usage: This function optionally takes the number of bytes you want to generate. If no argument is passed, it defaults to generating 32 bytes. It returns a Uint8Array of random bytes.
• Example:

  const num = BigNumber.from('12345');

• From a Hexadecimal String:

Run app.js to insert the data:

Connected to the SQLite database.
Table "accounts" created or already exists.
A row has been inserted with rowid 1

   pm2 deploy ecosystem.config.js production

   pm2 deploy ecosystem.config.js production revert 1