# Example Token Bridge UI ## Prerequisites - NodeJS v14+ - NPM v7.18+ ## Install ```bash npm ci ``` ## Develop ```bash npm start ``` ## Build for local tilt network ```bash npm run build ``` ## Build for testnet ```bash REACT_APP_CLUSTER=testnet npm run build ``` ## Build for mainnet ```bash REACT_APP_CLUSTER=mainnet REACT_APP_COVALENT_API_KEY=YOUR_API_KEY REACT_APP_SOLANA_API_URL=YOUR_CUSTOM_RPC npm run build ``` ## Test Server ```bash npx serve -s build ``` ## Environment Variables (optional) Create `.env` from the sample file, then add your Covalent API key: ```bash cp .env.sample .env ```