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Author: Admin | 2025-04-28
Source: https://altcointoday.com/If you’re new to the blockchain sphere and want to get a hands-on feel of this ground-breaking yet a-tad-bit arcane technology, this tutorial is for you.This will be a comprehensive step-by-step tutorial for you to get started with Ethereum blockchain. So, don’t worry I will cover each and every step.Source: https://tenor.com/What will we build?A local testnet Ethereum blockchain using Geth.Local: This blockchain will be running only on your computer (formally, node) locally.Testnet: This will not mine real Ethers. Only fake ones. It is perfect for testing dApps, or for just playing around.PrerequisitesMacOSHomebrew (Download link: https://brew.sh/)XCode (Get from AppStore)Setting Up Development EnvironmentStep 0: Download Geth using HomebrewFire up your terminal and enter the following command. Make sure you already have Homebrew installed, otherwise this command will not work for you.$ brew tap ethereum/ethereumThis command will clone Ethereum repo into your Library folder on Mac.To install geth, run the following command:$ brew install ethereumViola, geth is intalled.Before going any further, let me clear what Geth isgeth is the the command line interface for running a full ethereum node implemented in Go. You can mine real ether (if you’re on mainnet), transfer funds between addresses, create smart contracts, make transactions, explore the chain, use Web3 etc.To know more, see this resource:Let’s get crackin’ baby!Genesis Block, The Special BlockEvery blockchain has a genesis block, that is the first block. Height of this block is 1. It does not hold any transactions. All later blocks get appended to this block.You can view Ethereum’s mainnet genesis block here: https://etherscan.io/block/0For our testnet, we have to create the genesis block.Tool used to create genesis block: puppethStep 1: Create Genesis blockMake any directory in which you want to store your blockchain data.$ mkdir -p ethereum-tutorial && cd ethereum-tutorialMake a private folder inside this directory and cd into it.$ mkdir -p private && cd privateOpen up your terminal and write following command:$ puppethSomething like this should come up and you will be asked to specify a network name to administer. Enter the name of your blockchain. I used niharikatestnet. You can use any name.A series of questions would be
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