A decentralized bridge system for BankVN token deposits and withdrawals using Solidity smart contracts.

• Node.js (v16 or higher)
• npm package manager
• Ethereum wallet with Sepolia testnet ETH

godev-solidity/
├── contracts/
│   ├── BankVNToken.sol              # ERC20 token contract
│   ├── Bridge.sol                   # Bridge contract for deposits/withdrawals
│   └── Counter.sol                  # Example contract
├── scripts/
│   ├── deploy-bankvntoken.js        # Deploy BankVN token
│   ├── deploy-bridge.js             # Deploy bridge contract
│   └── deploy.js                    # General deployment
├── test/
│   ├── BankVNBridge.test.js     # Bridge tests (25 test cases)
│   └── Counter.test.js              # Example tests
├── docs/
│   └── deployment/
│       └── DEVELOPMENT_GUIDE.md     # Complete setup & deployment guide
├── hardhat.config.js                # Hardhat configuration
└── package.json                     # Dependencies

# Install dependencies
npm install

# Compile contracts
npm run compile

# Run tests (25/25 passing)
npm run test

For detailed instructions including environment setup, contract deployment, testing, and verification:

📖 Development Guide

The guide covers:

• Environment configuration (.env setup)
• Step-by-step contract deployment to Sepolia
• Contract verification on Etherscan
• Complete testing procedures
• Troubleshooting common issues

• ERC20 token with 1M initial supply
• Mint/burn functionality
• Deployed: 0x4D2c45779c89103c76Ae9cF5FE5596007a6cf815 (Sepolia)

• Secure token deposits with user ID tracking
• Owner-only withdrawals
• Gas optimized: ~63k gas (deposit), ~43k gas (withdraw)

npm run compile              # Compile contracts
npm run test                # Run all tests
npm run node                # Start local network

# Deployment (see Development Guide for setup)
npx hardhat run scripts/deploy-bankvntoken.js --network sepolia
npx hardhat run scripts/deploy-bridge.js --network sepolia

• 25/25 test cases passing
• Full coverage: deposits, withdrawals, security, gas optimization
• Run with: npm run test

ISC