Blockchain Development Programming Tutorials, Guides & Best Practices

• Update hardhat.config.js with your Etherscan API key:

     require("@nomiclabs/hardhat-waffle");
     require("@nomiclabs/hardhat-etherscan");

     module.exports = {
         solidity: "0.8.0",
         networks: {
             ropsten: {
                 url: "https://ropsten.infura.io/v3/YOUR_INFURA_PROJECT_ID",
                 accounts: [`0x${YOUR_PRIVATE_KEY}`]
             }
         },
         etherscan: {
             apiKey: "YOUR_ETHERSCAN_API_KEY"
         }
     };

Before you start building your DApp, you’ll need to set up your development environment. Here’s what you need:

• Node.js: For running the development server and installing dependencies.
• Truffle Suite: A development framework for Ethereum smart contracts and DApps.
• Ganache: A personal Ethereum blockchain for testing smart contracts locally.
• MetaMask: A browser extension wallet for interacting with the Ethereum blockchain.

Key Features:

• Decentralized: Operates on the blockchain, not controlled by any single entity.
• Trustless: Executes automatically when conditions are met, without requiring trust between parties.
• Immutable: Once deployed, the contract's code cannot be changed, ensuring the terms are fixed.