Update README with project documentation

README.md

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+# Static Exchange
 
-env file
-https://www.notion.so/Static-frontend-env-9e7224d8da0d4979857e04b8bf7f1f31?pvs=4
+A decentralized cross-chain swap application that enables atomic swaps between Bitcoin Lightning Network payments and stablecoins on multiple blockchains.
+
+## How It Works
+
+1. Select a destination blockchain (Polygon, Solana, or TRON)
+2. Connect your wallet or enter a destination address
+3. Specify the token amount to receive
+4. Pay the generated Lightning Network invoice
+5. Receive stablecoins on your chosen blockchain
+
+Swaps are secured using Hash Time Locked Contracts (HTLCs) with cryptographic preimage/payment-hash locking.
+
+## Supported Chains
+
+| Chain | Token | Token Address |
+|-------|-------|---------------|
+| Polygon | XSGD | `0xdc3326e71d45186f113a2f448984ca0e8d201995` |
+| Solana | USDC | `EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v` |
+| TRON | USDT | `TR7NHqjeKQxGTCi8q8ZY4pL8otSzgjLj6t` |
+
+## Tech Stack
+
+- **Frontend**: React 18, TypeScript
+- **Styling**: Tailwind CSS
+- **Blockchain**: ethers.js (Polygon), @solana/web3.js (Solana), WebLN (Lightning)
+- **Wallets**: Web3Modal (EVM), Solana Wallet Adapter (Backpack, Coinbase, Ledger, Solflare)
+- **API**: GraphQL via Apollo Client
+
+## Getting Started
+
+### Prerequisites
+
+- Node.js (or Bun)
+- A WalletConnect project ID
+
+### Installation
+
+```bash
+npm install
+```
+
+### Environment Variables
+
+Create a `.env` file with:
+
+```
+REACT_APP_WALLET_CONNECT_PROJECT_ID=<your-walletconnect-project-id>
+```
+
+### Development
+
+```bash
+npm start
+```
+
+### Production Build
+
+```bash
+npm run build
+```