How to Check the Balance of a Ethereum Wallet Address?
You can retrieve the balance of an Ethereum address using libraries like web3.js or ethers.js. Check the Balance of a Ethereum Wallet Address Using web3.js First, ensure you have …
Category: nodejs
How to Check if a Given String is a Valid Ethereum Wallet Address?
A Valid Ethereum Wallet Address Starts with “0x” and is 42 characters long. To check if a given string is a valid Ethereum address, you would typically: Check if …
How to Get the Latest Block Number (Head Block) on Ethereum Blockchain?
The simplest method/function to retrieve the latest block number on ETH aka Ethereum Blockchain is via the following method: const Web3 = require('web3'); const getBlockNumber = async() => { …
How to Get the Gas Price and Gas Fee on Ethereum Blockchain?
On Ethereum Blockchain, we need to pay the miner Gas Fee to perform some operations, for example, invoking Smart Contract, or simply transfering ETH. The Gas Fee equals to …
Node/Javascript Async/Await/Promise Function to Fetch JSON of an API URL
Most APIs return JSON. Below is a simple example of a Node.js (Javascript) async function that uses the node-fetch package to fetch JSON data from the provided URL. Firstly, …