🏦 Smart Bank - Decentralized Banking DApp

Smart Bank is a full-stack blockchain solution that brings traditional finance operations to Web3, combining a Solidity smart contract with an interactive React frontend. Users can securely deposit, withdraw, and track ETH balances directly through an intuitive interface, while accessing real-time on-chain contract data, all deployed on the Arbitrum Sepolia testnet for seamless testing.

✨ Key Features

• 💰 Deposit and withdraw ETH securely
• 🔄 Reactive user balance tracking
• 🔍 Query any Smart Bank user balance
• 📜 Transparent on-chain contract details
• 👤 Adjustable max contract balance (admin-only function)
• 🔗 Web3-Native Login via MetaMask integration
• 🌐 Immutable transactions logs recorded on Arbitrum Sepolia blockchain
• 🎨 Clean and intuitive UI with responsive design

🔥 Live Demo

👉 https://smart-bank-one.vercel.app/

🛠️ Tech Stack

• Smart Contract: Solidity (v0.8.24)
• Blockchain: Arbitrum Sepolia Testnet (via Infura RPC endpoint)
• Frontend: React + Vite
• UI Libraries: Material-UI + TailwindCSS
• Web3 Stack:
  • Ethers.js (Frontend integration)
  • Infura (Reliable blockchain node access)
• Deployment:
  • Smart Contract: Remix IDE → Arbiscan Sepolia
  • Frontend: Vercel

🚀 How to Use

Prerequisites

1. Install MetaMask wallet extension

2. Add Arbitrum Sepolia Testnet:

   • Network Name: Arbitrum Sepolia
   • RPC URL: https://sepolia-rollup.arbitrum.io/rpc
   • Chain ID: 421614
   • Currency: ETH

   (Developed using Infura infrastructure)

3. Get test ETH from Alchemy Faucet

Quick Start

1. Open https://smart-bank-one.vercel.app/
2. Click "Conecta tu billetera" (MetaMask will prompt)
3. Test core functions:
   • Deposit/Withdraw test ETH
   • Track live balance changes
4. Query any Smart Bank Balance (try admin: 0xde4...9FA9)
5. View contract on-chain details
6. Observe admin-restricted functions like "Modify Max Balance"

Note: Uses testnet environment only - No real funds involved

⚡ Next-Level Enhancements

• TypeScript integration for type-safe development
• Comprehensive testing suite
• Light&Dark mode toggle
• Multi-chain support
• Instant balance updates via web3 subscriptions

📜 License

This project is licensed under LGPL-3.0-only.