FeeDelegate Bridge

The Problem

High and unpredictable gas fees on Ethereum network force users to:

• Overpay during peak demand periods

• Constantly monitor gas prices manually

• Miss optimal bridging opportunities

• Spend unnecessary time on repetitive transactions

Our Solution

FeeDelegate Bridge leverages MetaMask Smart Accounts and delegation to deliver a fully autonomous gas optimization system. Users deposit funds once, set their maximum acceptable gas price, and a session-based agent automates all subsequent actions.

How It Works

1. Deposit on Base Sepolia(for demo purposes) – The user funds the agent contract.

2. Set Gas Threshold – Define a maximum acceptable gas price (e.g., 50 Gwei).

3. Authorize Session Account – Grant permission to a MetaMask Smart Account via ERC-7710 delegation.

4. Automated Monitoring – The session account continuously monitors Base Sepolia gas prices in real time.

5. Smart Bridging – When gas falls below the threshold, funds are automatically bridged to Monad using LayerZero V2.

6. Auto-Swap – On arrival, funds are automatically converted to USDC at a simulated rate of $2000/ETH.

Key Features

• True Automation – Complete autonomy after the initial setup.

• MetaMask Delegation – Secure, revocable, session-based permissions.

• Cross-Chain Support – Base Sepolia to Monad Testnet via LayerZero V2.

• Gas Optimization – Transactions execute only when gas is below the user-defined threshold.

• Auto-Swap Functionality – Immediate conversion to USDC upon bridging.

• Transparency – Real-time gas monitoring through an interactive dashboard.

Technical Stack

• Smart Accounts: MetaMask Delegation Toolkit (ERC-7710)

• Cross-Chain Messaging: LayerZero V2 Endpoint

• Supported Chains: Base Sepolia (source) → Monad Testnet (destination)

• Frontend: Next.js 15, Wagmi, RainbowKit, TailwindCSS

• Smart Contracts: Solidity 0.8.20, Foundry

Contracts

• Agent.sol (Base Sepolia): 0x7FbaAA1E70a7D4Efcc0554BDa5416FEAAcacD4A1

• MonadReceiver.sol (Monad): 0x7490D3B9C22698bEfeEAf2efCC4fA78ffff96e77

Future Plans

Multi-Chain Expansion

• Deployment across 10+ EVM-compatible chains, including Arbitrum, Optimism, Polygon, BSC, and Avalanche.

• Bi-directional bridging support (Monad → L2s when Monad gas rises).

• Integration of non-EVM networks such as Solana and Cosmos.

Enhanced Automation

• AI-driven gas price forecasting to bridge proactively.

• Cross-chain portfolio rebalancing based on gas efficiency.

Why It Matters

Gas volatility costs users billions every year. FeeDelegate Bridge provides the first autonomous cross-chain solution that optimizes gas spending without manual effort. By combining MetaMask Smart Accounts with LayerZero, it introduces a “set and forget” approach to cross-chain transactions.