Create comprehensive dApp starter repository with contracts, tests, frontend, and documentation

.env.example

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+# Network RPC URLs
+SEPOLIA_RPC_URL=https://eth-sepolia.g.alchemy.com/v2/YOUR_ALCHEMY_KEY
+MAINNET_RPC_URL=https://eth-mainnet.g.alchemy.com/v2/YOUR_ALCHEMY_KEY
+
+# Private key for deployment (NEVER commit your real private key!)
+PRIVATE_KEY=your_private_key_here
+
+# Etherscan API key for contract verification
+ETHERSCAN_API_KEY=your_etherscan_api_key_here

.github/workflows/test.yml

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+name: Smart Contract CI
+
+on:
+  push:
+    branches: [ main, develop ]
+  pull_request:
+    branches: [ main, develop ]
+
+permissions:
+  contents: read
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v3
+
+    - name: Setup Node.js
+      uses: actions/setup-node@v3
+      with:
+        node-version: '18'
+        cache: 'npm'
+
+    - name: Install dependencies
+      run: npm ci
+
+    - name: Compile contracts
+      run: npm run compile
+
+    - name: Run tests
+      run: npm test
+
+    - name: Check contract size
+      run: npx hardhat size-contracts || echo "Size check skipped"
+      continue-on-error: true
+
+  lint:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v3
+
+    - name: Setup Node.js
+      uses: actions/setup-node@v3
+      with:
+        node-version: '18'
+        cache: 'npm'
+
+    - name: Install dependencies
+      run: npm ci
+
+    - name: Run Solidity linter
+      run: npx solhint 'contracts/**/*.sol' || echo "Linting skipped"
+      continue-on-error: true

.gitignore

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+# Dependencies
+node_modules/
+package-lock.json
+
+# Environment variables
+.env
+.env.local
+.env.production
+
+# Build outputs
+dist/
+build/
+cache/
+artifacts/
+
+# Hardhat files
+coverage/
+typechain/
+typechain-types/
+
+# IDE
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+
+# OS files
+.DS_Store
+Thumbs.db
+
+# Logs
+logs/
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# Testing
+coverage.json
+
+# Temporary files
+*.tmp
+.cache/

FAQ.md

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+# FAQ - Frequently Asked Questions
+
+## General Questions
+
+### What is a dApp?
+A dApp (decentralized application) is an application that runs on a blockchain network instead of centralized servers. It typically consists of smart contracts (backend) and a web interface (frontend).
+
+### What is Ethereum?
+Ethereum is a blockchain platform that allows developers to build and deploy smart contracts and dApps. It has its own cryptocurrency called Ether (ETH).
+
+### What is a smart contract?
+A smart contract is code that runs on the blockchain. Once deployed, it executes automatically when certain conditions are met, without needing a middleman.
+
+### Do I need to know blockchain to start?
+No! This starter repository is designed for beginners. Basic JavaScript knowledge helps, but you can learn as you go.
+
+## Setup Questions
+
+### Why do I need Node.js?
+Node.js lets you run JavaScript on your computer. We use it to run development tools like Hardhat and to manage project dependencies.
+
+### What is MetaMask?
+MetaMask is a browser extension that acts as a cryptocurrency wallet. It lets you interact with dApps and sign transactions.
+
+### Do I need real money to test?
+No! You can use:
+- Local blockchain (completely free, no real money)
+- Testnets with free test ETH (not real money)
+- Only need real ETH for mainnet deployment
+
+### How do I get test ETH?
+Visit a faucet website like:
+- Sepolia: [sepoliafaucet.com](https://sepoliafaucet.com/)
+- Goerli: [goerlifaucet.com](https://goerlifaucet.com/)
+
+Enter your wallet address and receive free test ETH.
+
+## Development Questions
+
+### What is Hardhat?
+Hardhat is a development environment for Ethereum. It helps you:
+- Compile smart contracts
+- Run tests
+- Deploy contracts
+- Debug code
+
+### What is Solidity?
+Solidity is the programming language used to write smart contracts for Ethereum. It's similar to JavaScript and C++.
+
+### Why use OpenZeppelin?
+OpenZeppelin provides secure, tested smart contract templates. Instead of writing everything from scratch, you can use their battle-tested code.
+
+### What is gas?
+Gas is the fee paid to execute transactions or run smart contracts on Ethereum. It's paid in ETH and goes to miners/validators.
+
+### How much does deployment cost?
+Costs vary based on:
+- Network (local = free, testnet = free, mainnet = $$$)
+- Gas prices (changes constantly)
+- Contract complexity
+
+Example mainnet costs (approximate):
+- Simple contract: $5-50
+- Complex contract: $50-500+
+
+### Can I change a smart contract after deployment?
+No! Smart contracts are immutable once deployed. Plan carefully and test thoroughly. You can:
+- Deploy a new version
+- Use upgradeable contract patterns (advanced)
+
+## Usage Questions
+
+### Why did my transaction fail?
+Common reasons:
+- Out of gas (increase gas limit)
+- Contract error (check error message)
+- Wrong network (switch to correct network)
+- Insufficient funds
+
+### What's the difference between view and public functions?
+- `view`: Only reads data, doesn't change state, FREE to call
+- `public`: Can change state, costs gas, needs transaction
+
+### How do I test my contracts?
+```bash
+npm test
+```
+
+Tests are in the `test/` folder. Add new tests for new features.
+
+### How do I deploy to testnet?
+1. Get test ETH from faucet
+2. Configure `.env` with RPC URL and private key
+3. Run `npm run deploy:testnet`
+
+## Troubleshooting
+
+### "Error: Cannot find module"
+```bash
+rm -rf node_modules package-lock.json
+npm install
+```
+
+### "Network timeout"
+- Check your internet connection
+- Try different RPC provider
+- Increase timeout in `hardhat.config.js`
+
+### "Transaction underpriced"
+- Increase gas price
+- Wait and try again (gas prices fluctuate)
+
+### "Nonce too low"
+- Clear pending transactions in MetaMask
+- Reset account in MetaMask settings
+
+### MetaMask not detecting my local network
+- Make sure Hardhat node is running
+- Check network settings (RPC URL, Chain ID)
+- Try disconnecting and reconnecting
+
+### Frontend not updating after contract changes
+- Redeploy contracts
+- Update contract addresses in frontend
+- Clear browser cache
+- Hard refresh (Ctrl+Shift+R)
+
+## Security Questions
+
+### Is my private key safe?
+- NEVER share your private key
+- NEVER commit `.env` to git
+- Use separate wallets for dev/production
+- Keep main funds in hardware wallet
+
+### How do I secure my smart contracts?
+- Use OpenZeppelin contracts
+- Write comprehensive tests
+- Get security audit before mainnet
+- Follow security best practices
+- Start with simple, well-tested patterns
+
+### What happens if I find a bug after deployment?
+- You cannot change deployed contracts
+- You may need to deploy a new version
+- Have an emergency plan before deployment
+- Consider using proxy patterns for upgrades
+
+## Cost Questions
+
+### How much does it cost to learn?
+- This repository: FREE
+- Local testing: FREE
+- Testnet deployment: FREE
+- Learning resources: Mostly FREE
+- Mainnet deployment: Costs real ETH
+
+### What are typical gas costs?
+Gas costs depend on network congestion:
+- Low: 20-30 gwei
+- Medium: 30-50 gwei
+- High: 50-100+ gwei
+
+### Can I reduce gas costs?
+Yes:
+- Deploy during low-traffic times
+- Optimize your code
+- Use gas-efficient patterns
+- Batch transactions
+- Use Layer 2 solutions
+
+## Next Steps Questions
+
+### What should I learn next?
+1. Master the basics (SimpleStorage)
+2. Understand tokens (ERC20)
+3. Try NFTs (ERC721)
+4. Build a small project
+5. Deploy to testnet
+6. Learn advanced patterns
+
+### Where can I find help?
+- Ethereum Stack Exchange
+- Discord communities
+- This repository's issues
+- Reddit r/ethdev
+- Twitter #ethereum
+
+### How long does it take to learn?
+- Basics: 1-2 weeks
+- Build first dApp: 1 month
+- Comfortable with Solidity: 2-3 months
+- Production-ready: 6+ months
+
+### Can I make money building dApps?
+Yes! Opportunities include:
+- Freelance development
+- Full-time blockchain jobs
+- Building your own projects
+- Hackathon prizes
+- Bug bounties
+- Grants and funding
+
+## Still Have Questions?
+
+- Check the [documentation](./docs/)
+- Read the [RESOURCES.md](./RESOURCES.md)
+- Open an issue on GitHub
+- Ask on Ethereum Stack Exchange
+
+---
+
+Don't see your question? Open an issue and we'll add it!