Břetislav HájekinBetter Programming·Mar 11, 2022Member-onlyExchanging Encrypted Data on Blockchain Using MetaMaskTutorial 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…Blockchain5 min readBlockchain5 min read
Marco Solís·Dec 31, 2021Integrating the Multicall contract into your ReactJS DappThis 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 . ├──…React4 min readReact4 min read
Kavit (zenwraight)intechie·Mar 17, 2022Build ToDo Application in React and SolidityPrerequisites 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…React6 min readReact6 min read
Hideyoshi Moriya·Jul 3, 2021How to get a balance of Ether with ethers.jsconst 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`) }) SupportEthereum1 min readEthereum1 min read
Hash Protocol·Jan 30, 2022Why is zkSync in Leading Position of Ethereum Layer-2 Scaling Solution?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…Zkrollup4 min readZkrollup4 min read
Jagadhiswaran DinCoinsBench·Jan 1, 2022Web3.js BasicsWeb3.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…Web Development2 min readWeb Development2 min read
Balakrishna ChinCoinsBench·Jan 15, 2022Web3.py — The FundamentalsLet 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. …Web34 min readWeb34 min read
兄弟鏈 Brochain·Jan 15, 2022Member-onlySolana Web3 Tutorial (2) — Connect your Web3 Program to WalletWelcome 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…Solana Development4 min readSolana Development4 min read
Leon DoinChainSafe·Jan 11, 2022How to Verify a Signed Message in SolidityHow 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.comMetamask3 min readMetamask3 min read
兄弟鏈 Brochain·Jan 8, 2022Member-onlySolana Web3 Tutorial (1) —Installation and Account OperationsWhat 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…Programming4 min readProgramming4 min read
Zubair KhalidinBlock Magnates·Dec 28, 2021Real-time Solidity Event Listening with Web3JS — Part 1Hola 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…Solidity3 min readSolidity3 min read
Shmoji·Sep 25, 2021Member-onlyWeb3: How to Check if ETH Address is ValidThis 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. …Web31 min readWeb31 min read
Victor Yeo·Nov 13, 2021Sending raw transactionIn 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…Raw Transactions1 min readRaw Transactions1 min read
Szymon KolberinCoinsBench·Dec 12, 2021Metamask (mysterious) provider explained.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…Metamask2 min readMetamask2 min read
Sameep singhaniainGinete Technologies·Jul 24, 2019Member-onlyDApp development with ethers.jsThe 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 …Blockchain5 min readBlockchain5 min read
