Web3 & Blockchain

Web3 represents the decentralized internet built on blockchain technology.

Core Concepts

Blockchain

A distributed, immutable ledger of transactions.

Smart Contracts

Self-executing code on the blockchain.

contract SimpleStorage {
  uint256 storedData;
  
  function set(uint256 x) public {
    storedData = x;
  }
}

Wallet Integration

import { ethers } from 'ethers'

const provider = new ethers.providers.Web3Provider(window.ethereum)
const signer = provider.getSigner()

Popular Platforms

• Ethereum: Smart contract platform
• Solana: High-performance blockchain
• Polygon: Ethereum scaling solution

Development Tools

• Hardhat
• Ethers.js / Web3.js
• MetaMask
• Alchemy
• The Graph

Use Cases

• DeFi (Decentralized Finance)
• NFTs (Non-Fungible Tokens)
• DAOs (Decentralized Organizations)
• dApps (Decentralized Applications)