Update README

Author: kuzdogan

README.md

@@ -1,36 +1,43 @@
-This is a [Next.js](https://nextjs.org) project bootstrapped with [`create-next-app`](https://nextjs.org/docs/app/api-reference/cli/create-next-app).
+# 4byte.sourcify.dev
 
-## Getting Started
+Ethereum function and event signature database interface for Sourcify verified contracts.
 
-First, run the development server:
+## Overview
+
+A Next.js web interface for searching and looking up Ethereum function selectors and event signatures from the [OpenChain API](https://openchain.xyz). The database is built from Sourcify verified smart contracts.
+
+## Features
+
+- **Text search**: Use wildcards (`*`, `?`) to find function/event signatures
+- **Hash lookup**: Search by 4-byte function selectors or 32-byte event hashes
+- **Auto-detection**: Automatically determines search type based on input format
+- **Copy to clipboard**: Easy copying of signatures and hashes
+- **Statistics**: Live count of functions and events in the database
+
+## Development
 
 ```bash
+npm install
 npm run dev
-# or
-yarn dev
-# or
-pnpm dev
-# or
-bun dev
 ```
 
-Open [http://localhost:3000](http://localhost:3000) with your browser to see the result.
-
-You can start editing the page by modifying `app/page.tsx`. The page auto-updates as you edit the file.
+Open [http://localhost:3000](http://localhost:3000) to view the application.
 
-This project uses [`next/font`](https://nextjs.org/docs/app/building-your-application/optimizing/fonts) to automatically optimize and load [Geist](https://vercel.com/font), a new font family for Vercel.
+## Static Export
 
-## Learn More
+Build static files for deployment:
 
-To learn more about Next.js, take a look at the following resources:
-
-- [Next.js Documentation](https://nextjs.org/docs) - learn about Next.js features and API.
-- [Learn Next.js](https://nextjs.org/learn) - an interactive Next.js tutorial.
+```bash
+npm run build
+```
 
-You can check out [the Next.js GitHub repository](https://github.com/vercel/next.js) - your feedback and contributions are welcome!
+Generated files will be in the `out` directory.
 
-## Deploy on Vercel
+## Environment Variables
 
-The easiest way to deploy your Next.js app is to use the [Vercel Platform](https://vercel.com/new?utm_medium=default-template&filter=next.js&utm_source=create-next-app&utm_campaign=create-next-app-readme) from the creators of Next.js.
+Copy `.env.example` to `.env.local` and configure:
 
-Check out our [Next.js deployment documentation](https://nextjs.org/docs/app/building-your-application/deploying) for more details.
+```
+NEXT_PUBLIC_OPENCHAIN_API_URL=https://api.openchain.xyz
+NEXT_PUBLIC_UMAMI_WEBSITE_ID=your-website-id
+```