Circulate | The Universal Bridge

Circulate is a premium, high-performance cross-chain bridge designed for seamless USDC transfers across multiple testnet ecosystems. Built with Circle's Bridge Kit v2 and CCTP, it offers a streamlined "swap-style" experience with sub-second finality.

🌐 Supported Testnets (15)

Circulate provides a unified interface for 18 distinct testnet environments:

• Arc Testnet (Native Gas)
• Ethereum Sepolia
• Base Sepolia
• Arbitrum Sepolia
• Avalanche Fuji
• Optimism Sepolia
• Polygon Amoy
• Unichain Sepolia
• Linea Sepolia
• Sei Testnet
• World Chain Sepolia
• Ink Testnet
• XDC Apothem
• Monad Testnet
• Codex Testnet

✨ Core Features

• One-Click Integration: Automatically adds networks and imports USDC tokens to MetaMask.
• Transaction Batching: Uses Privy Smart Wallets (ERC-4337) to batch "Approve" and "Burn" steps into a single atomic operation.
• Real-Time Tracking: Full visibility into the CCTP lifecycle (Burn → Attestation → Mint).
• Responsive Design: Premium dark/light mode UI with custom-tuned aesthetics and logo visibility.

🛠️ Tech Stack

• Frontend: Next.js 15 (App Router), React 19
• Authentication: Privy (Embedded Wallets & Smart Accounts)
• Bridging Logic: Circle Bridge Kit
• Engine: Viem v2
• Styling: Tailwind CSS v4, Lucide React, Shadcn UI

🚀 Getting Started

1. Clone & Install:

   pnpm install

2. Environment Setup: Create a .env.local file with your Privy credentials:

   NEXT_PUBLIC_PRIVY_APP_ID=your_app_id
   NEXT_PUBLIC_PRIVY_CLIENT_ID=your_client_id

3. Run Development:

   pnpm dev

4. Circulate: Open http://localhost:3000 and start moving USDC.

---