What is Web3?
Web3 represents the decentralized future of the internet through blockchain, smart contracts, and self-sovereign identity. This tutorial will teach the fundamental concepts and practical implementation techniques.
Core Web3 Technologies
Blockchain Basics
- ✓
- Decentralized ledger principles
- ✓
- Cryptographic hashing in blockchains
Smart Contracts
- ✓
- Solidity programming fundamentals
- ✓
- Ethereum Virtual Machine (EVM)
Smart Contract Exercise
// Simple Ethereum Smart Contract Example
pragma solidity ^0.8.0;
contract SimpleStorage {
uint storedData;
function set(uint x) public {
storedData = x;
}
function get() public view returns (uint) {
return storedData;
}
}
This basic Solidity contract demonstrates a simple storage pattern used in decentralized applications.
DApp Development
Create decentralized applications by integrating frontends with blockchain backends. This involves:
- React + Web3.js integration
- MetaMask wallet connectivity
- IPFS for decentralized file storage