TrustFill

How It Works

TrustFill is an off-chain automated liquidity manager that monitors your USDC balance across multiple blockchains and triggers a top-up when it falls below a user-defined threshold. It ensures you always maintain enough funds on target chains without manual intervention.

1. Monitoring:
   Continuously tracks USDC balance on the user’s selected chains.

2. Triggering:
   When the balance drops below a minimum threshold, TrustFill detects it instantly.

3. Smart Routing:

   • For Sepolia → Avalanche Fuji: uses Circle CCTP for native USDC bridging.

   • For other chains: uses LI.FI SDK to find the best cross-chain route.

4. Execution:
   Constructs and submits the transaction using the user's connected wallet.
   All logic is executed off-chain, ensuring speed and flexibility while preserving decentralization (non-custodial).

Tech Stack

• Frontend: React + Vite

• Wallet & Chain Interaction: Wagmi, Viem, Ethers.js

• Cross-Chain Swaps:

  • Circle CCTP for native USDC bridging

  • LI.FI SDK for multi-chain swap routing

• Wallet UI: RainbowKit

• Styling & UI: Tailwind CSS

• Testnets Used: Ethereum Sepolia, Avalanche Fuji

• Mainnets Supported: Polygon, Arbitrum One, Base