Multi-Chain Wallet Balance Checker

A simple and developer-friendly web app that lets you check the balance of any public blockchain address across multiple networks — Bitcoin, Ethereum, Cardano, Polkadot, Sui, and Solana — and instantly see its USD equivalent using the CoinGecko API.

Features

• Supports major blockchains: Bitcoin, Ethereum, Cardano, Polkadot, Sui, and Solana
• Real-time balance fetching using public blockchain explorers and RPC APIs
• Automatic USD conversion with CoinGecko
• Clean and lightweight frontend-only architecture (no backend or database required)
• Built with TypeScript, Vite, and modern React

Tech Stack

• Blockchain APIs:

  • Bitcoin: BlockCypher

  • Ethereum: Etherscan

  • Cardano: Blockfrost

  • Sui: JSON-RPC

  • Solana: Helius RPC or Solscan API

  • Polygon/BNB CHAIN: Polyscan, BSCScan

• Frontend: React + Vite + Tailwind CSS and framer motion
• Pricing API: CoinGecko

Installation

md multi-chain-balance-checker
cd multi-chain-balance-checker
git clone https://github.com/CHRISLeGURU/...

npm install
npm run dev
Usage
Enter a valid blockchain address and select the blockchain network.

The app will fetch the balance and display it in native token and USD value.

Environment Variables
Create a .env.local file in the root folder and add your API keys:


VITE_BLOCKFROST_API_KEY=your_blockfrost_api_key
VITE_HELIUS_API_KEY=your_helius_api_key
VITE_ETHERSCAN_API_KEY=your_etherscan_api_key
VITE_BSCSCAN_API_KEY=.......
VITE_POLYGONSCAN_API_KEY=........

##Contributing
Contributions are welcome! Feel free to open issues or submit pull requests.