Update README with project overview and setup instructions

README.md

@@ -1,3 +1,57 @@
+# Static Exchange
 
-env file
-https://www.notion.so/Static-frontend-env-9e7224d8da0d4979857e04b8bf7f1f31?pvs=4
+A React-based cryptocurrency swap application that facilitates exchanging Bitcoin (via Lightning Network) for stablecoins across multiple blockchain networks.
+
+## Features
+
+- **Multi-chain support** -- Swap to Polygon (XSGD), Solana (USDC), or Tron (USDT)
+- **Lightning Network payments** -- Pay invoices via WebLN-compatible wallets or QR code
+- **Wallet integration** -- Connect via Web3Modal (Polygon), Solana wallet adapters (Backpack, Coinbase, Ledger, Solflare), or manual address entry (Tron)
+- **Atomic swaps** -- Preimage-based hash time-locked contract (HTLC) pattern for trustless exchange
+- **Real-time order tracking** -- Live status updates from creation through fund release
+
+## Tech Stack
+
+- React 18, TypeScript, Tailwind CSS
+- Apollo Client (GraphQL)
+- ethers.js / @solana/web3.js / WebLN
+- QR code generation (qrcode.react)
+
+## Getting Started
+
+### Prerequisites
+
+- Node.js 16+
+- npm, yarn, or bun
+
+### Installation
+
+```bash
+npm install
+```
+
+### Environment Variables
+
+Create a `.env` file in the project root. See the [environment variable reference](https://www.notion.so/Static-frontend-env-9e7224d8da0d4979857e04b8bf7f1f31?pvs=4) for required values.
+
+### Development
+
+```bash
+npm start
+```
+
+Opens the app at [http://localhost:3000](http://localhost:3000).
+
+### Production Build
+
+```bash
+npm build
+```
+
+## Supported Chains and Tokens
+
+| Chain   | Token | Contract Address                             |
+| ------- | ----- | -------------------------------------------- |
+| Polygon | XSGD  | `0xdc3326e71d45186f113a2f448984ca0e8d201995` |
+| Solana  | USDC  | `EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v` |
+| Tron    | USDT  | `TR7NHqjeKQxGTCi8q8ZY4pL8otSzgjLj6t`        |