Ethers.Js Development Tutorials, Guides & Insights

    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:

• Start and End Block: Adjust the startblock and endblock parameters to limit the range of blocks you want to query.
• Sort: Set the sort parameter to asc (ascending) or desc (descending) to control the order of the transactions.
• Token Transfers for All Tokens: You can modify the API call to query all token transfers for an address, not just a specific token contract, by omitting the contractaddress parameter.

In this tutorial, you learned how to use Ethers.js to query ERC-20 token balances and how to leverage the Etherscan API to retrieve token transaction histories. These are essential techniques for building decentralized applications, wallets, or blockchain explorers that interact with ERC-20 tokens on the Ethereum network.

node contractInteraction.js

If everything is set up correctly, the script will output the token balance of the specified wallet.

Once you've successfully retrieved the balance, you can expand your script to add more features. For example:

• Check the balance of other Ethereum addresses (not just your wallet).
• Send ETH to other addresses.
• Interact with smart contracts using Ethers.js.

• Website: Libsodium

This cheatsheet highlights essential blockchain libraries that are crucial for developing secure, efficient, and feature-rich blockchain applications. Whether you're working on Ethereum, Bitcoin, or other blockchain platforms, these libraries provide the tools needed to interact with blockchains, manage cryptographic operations, and build decentralized applications.