Web3 Guide

A comprehensive guide to Web3 development covering Solidity smart contracts, Hardhat framework, React integration, and blockchain interaction examples.

📚 Examples Overview

Example	Folder	Description
00	00-rsa-dsa	RSA/DSA cryptography examples using Jupyter Notebook
01	01-helloworld	Basic Hello World smart contract in Solidity
02	02-set-get	Simple storage and retrieval smart contract
03	03-event	Solidity events and logging examples
04	04-token	Basic token smart contract implementation
05	05-get-event-log	Python web3.py event log retrieval
06	06-hardhat-sample1	Hardhat framework with Token contract
07	07-hardhat-sample2	Hardhat framework with SimpleStorage contract
08	08-voting	Voting smart contract example
09	09-amm	Automated Market Maker (AMM) smart contracts
10	10-ethersjs	Ethers.js integration examples
11	11-authentication(DSA)	DSA authentication and multisender examples
12	12-multisender	Multisender smart contract for batch transfers

🛠️ Technology Stack

Blockchain & Smart Contracts

• Solidity: Smart contract development language
• Hardhat: Ethereum development environment
• Remix IDE: Online Solidity compiler and IDE

Frontend & Web3 Integration

• React: Frontend framework for Web3 applications
• Ethers.js: Ethereum JavaScript library
• Web3.js: Alternative Ethereum JavaScript library

Backend & APIs

• Python: Backend development and blockchain interaction
• web3.py: Python library for Ethereum interaction
• FastAPI: Modern Python web framework

Infrastructure & Services

• Infura API: Ethereum node service
• Base Sepolia: Test network for development
• AWS/Azure: Cloud deployment options

🌐 Network Configuration

Base Sepolia Testnet

• Network: Base Sepolia (https://sepolia.basescan.org/)
• Explorer: https://sepolia.basescan.org/address/0xfab19c296f34b48471b831f59850da888e73fb7f
• Purpose: Development and testing environment

🚀 Getting Started

Prerequisites

1. Node.js (v16 or higher)
2. Python (v3.8 or higher)
3. Git

Installation

# Clone the repository
git clone <repository-url>
cd web3-guide

# Install Node.js dependencies (for Hardhat examples)
npm install

# Install Python dependencies (for web3.py examples)
pip install web3 jupyter

Running Examples

Each example folder contains its own README with specific instructions. Generally:

1. Solidity Contracts: Use Remix IDE or Hardhat
2. Python Scripts: Run with Python interpreter
3. React Apps: Use npm start or yarn start
4. Hardhat Projects: Use npx hardhat commands

📖 Learning Path

1. Start with Basics: 01-helloworld, 02-set-get
2. Learn Events: 03-event, 05-get-event-log
3. Explore Tokens: 04-token
4. Framework Usage: 06-hardhat-sample1, 07-hardhat-sample2
5. Advanced Features: 08-voting, 09-amm
6. Frontend Integration: 10-ethersjs
7. Security & Authentication: 11-authentication(DSA), 12-multisender

🤝 Contributing

Feel free to contribute by:

• Adding new examples
• Improving existing code
• Updating documentation
• Reporting issues

📄 License

This project is licensed under the MIT License - see the LICENSE file for details.