Web3 Development
Build the future of the internet with decentralized applications and protocols.
1. Web3 Architecture
Web2 (Traditional)
- Centralized servers
- Company owns your data
- Single point of failure
- Permission-based
- Platform dependency
Web3 (Decentralized)
- Distributed networks
- You own your data
- Censorship resistant
- Permissionless
- Interoperable
Web3 Stack Components:
- Blockchain: NetworkCoin AI for transactions and state
- Smart Contracts: Backend business logic
- Frontend: React, Next.js, or traditional web
- Storage: IPFS for decentralized file storage
- Identity: Wallet-based authentication
- Communication: Decentralized messaging protocols
2. Building dApps
Define Your dApp
What problem does it solve? What makes it better decentralized?
Design Smart Contracts
Map out your backend logic and data structures
Build Frontend
Create user interface that interacts with contracts
Integrate Wallet
Add wallet connection for authentication and transactions
Test & Deploy
Test on testnet, audit, then deploy to mainnet
3. IPFS and Storage
InterPlanetary File System (IPFS) is decentralized storage for Web3 apps. Instead of storing files on centralized servers, they're distributed across a peer-to-peer network.
Using IPFS for NFT Metadata
1. Upload Image: Upload artwork to IPFS, get hash (e.g., QmXyZ...)
2. Create Metadata: JSON file with name, description, IPFS image link
3. Upload Metadata: Upload JSON to IPFS, get metadata hash
4. Mint NFT: Smart contract stores metadata hash
Result: Fully decentralized NFT that can never be taken down
4. Wallet Integration
Wallet Connect Features:
- Authentication: Users log in with their wallet
- Transactions: Sign and send blockchain transactions
- Balance Display: Show user's token balances
- Network Switch: Handle different blockchain networks
- Event Listening: React to blockchain events in real-time
Test Your Knowledge
Question 1: What's the main difference between Web2 and Web3?
Web2 is centralized (companies own data and control platforms), while Web3 is decentralized (users own their data and interact peer-to-peer).
Question 2: Why use IPFS instead of traditional cloud storage?
IPFS is decentralized and censorship-resistant. Files can't be taken down by any single entity, making it perfect for permanent Web3 content.