Blockchain Development Programming Tutorials, Guides & Best Practices

• crypto.randomBytes:
• Library: crypto.randomBytes is part of Node.js’s built-in crypto module. It requires no additional dependencies and is readily available in any Node.js environment.
• Usage: The function takes a single argument specifying the number of bytes to generate and returns a Buffer object containing the random bytes.
• Example:

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

• Greater Than:

  console.log(num1.gt(num2)); // true

Once you’ve added the code, run the script:

node getTokenBalance.js

• Rate Limits: Etherscan’s free tier limits the number of API requests per second (usually around 5 per second). This is fine for querying data but can be limiting for large-scale applications that need to process a lot of data quickly.
• Pricing: Etherscan offers paid tiers that increase the API request limits.

• Rate Limits: Infura’s free tier provides a generous number of requests (e.g., 100,000 requests per day) and supports more requests as you scale. This makes it more suitable for real-time dApps.
• Pricing: Infura’s paid plans offer higher limits and additional features like access to Layer 2 networks.

• Node.js installed on your machine.
• A basic understanding of JavaScript and blockchain concepts.
• An Ethereum wallet with some test ETH (using testnets like Goerli or Ropsten is recommended for testing).
• An Infura Project ID to access the Ethereum network.

If you don't have an Infura account yet, follow these steps: