Tutorial on how to use native MetaMask encryption-decryption functions — Every Ethereum account is associated with private/public key pair. A natural question is how to use these keys for encrypting data? Does MetaMask support encryption? This tutorial will show a user-friendly way to use MetaMask to exchange encrypted messages on a blockchain. Throughout this tutorial, I am using TypeScript notation…

This is the first article in a series on how we are integrating different technologies to create the Otomee NFT Marketplace and how you can do it too. Pre-requisites The Multicall implementation uses redux, so you will need to have it set-up on your application. Dependancies ethers @typechain/ethers-v5 @uniswap/redux-multicall @uniswap/v3-periphery Folder structure . ├──…

Prerequisites Please make sure you have knowledge about the following: Node.js installed on your machine. Metamask wallet extension installed. Knowledge about how ETH Blockchain works. Resources Solidity overview Follow my YouTube channel for upcoming courses Project Overview In this article, we will first write our own Solidity-based Smart Contract, Deploy theSmart Contract on ETH…

const ethers = require('ethers') const network = 'rinkeby' // use rinkeby testnet const provider = ethers.getDefaultProvider(network) const address = '0xF02c1c8e6114b1Dbe8937a39260b5b0a374432bB' provider.getBalance(address).then((balance) => { // convert a currency unit from wei to ether const balanceInEth = ethers.utils.formatEther(balance) console.log(`balance: ${balanceInEth} ETH`) }) Support

Ethereum’s network congestion and high transaction fees have created a mature market for its Layer-1 competitors and EVM compatible Layer-2 projects. As a result easy deployment of decentralized applications using much of the same infrastructure, these solutions have been embraced by users who had been priced out of Ethereum mainnet…

Web3.js is a Ethereum JavaScript API used in the interacting with local And Remote Ethereum Node using HTTP, IPC and WebSocket. The Bitcoin Protocol It Was Designed in a way of validating the transaction and store the transaction. But Ethereum was Designed in a way to be adaptable and flexible…

Let me be frank here. No one uses Web3.py in it’s native form. No one actually needs it especially in a world where boilerplates exist for everything. But still, you need native Web3.py. Why? Because that will teach you what’s happening — how the compile and deployment process works. …

Welcome to the second passage of the series. In previous passage, we walked through how to generate Solana keypair using solana-web3 javascript library. In this series, we would talk about how you could connect your web3 program with your sollet wallet. You can also use the same logic to connect…

How to sign a message with a wallet and verify the signature on-chain using ecrecover — Introduction This is a practical tutorial on signing a message using MetaMask and then verifying it on-chain. Here’s a demo: https://leon-do.github.io/ecrecover/ GitHub - leon-do/ecrecover: verify a signed ETH message You can't perform that action at this time. You signed in with another tab or window. You signed out in another tab or…github.com

What is Solana Web3? Solana Web3 is a library written in Javascript to help you write programs interact with Solana programs. Using this library, you can write program to connect to Solana cluster, create accounts, interact with onchain program etc. This series walks you through how you could start from very basic programming using…

Hola amigos! So you have finally decided to utilize the power of Solidity Events, but you must probably be struggling to get it done the right way. I know this because I have been through this struggle myself. Solidity provides a great way to monitor what is going inside the…

This is going to be a super simple tutorial that will cover how to check if an Ethereum address is indeed a valid address. Here is the video tutorial if you prefer that. This tutorial starts from a newly created Next JS project. …

In this article, we dissect the ReactJS code to send a raw transaction on Ethereum blockchain or Binance smart chain. The web3 library is used to send the raw transaction. The steps are: Specify the gas price and gas limit Set the txOptions and (for bsc) custom chain info Create…

If you ever wrote even a simple dApp, there is almost a 100% chance that you’ve used a “provider”. I did, but lately, it draw my attention. What is provider after all, and what hides under that object? When do you exactly use provider? Let’s say that you’re building an app that will interact with the…

The ethers.js library is an alternative to both web3.js and EthereumJS and is designed to make it easier to interact with Ethereum Blockchain. It aims to be highly maintained, flexible, complete and compact library to interact with Ethereum Blockchain. Currently, the codebase of ethers.js …