Cross-Chain Bridge Arbitrage Bot

A cross-chain arbitrage bot that monitors token prices across L1s and L2s, detects mispricing created by bridge delays or liquidity imbalances, and executes profitable trades.

Bridge Monitoring:

• Wormhole (Solana ↔ EVM chains)
• LayerZero / Stargate (EVM ↔ EVM)
• Across Protocol (fast bridge)
• Synapse Protocol
• Hop Protocol
• Celer cBridge

Arbitrage Detection:

• Same-token price comparison across 12+ chains
• Spread calculation including bridge fees and gas
• Liquidity depth monitoring on both sides
• Bridge transaction time estimation
• Historical spread analysis with mean reversion signals

Execution:

• Atomic same-chain leg execution
• Bridge initiation with optimal route selection
• Auto-claim on destination chain
• Multi-hop routing (Chain A → Chain B → Chain C)
• Parallel monitoring and execution

Supported Chains:

• Ethereum, Arbitrum, Optimism, Base, Polygon
• BSC, Avalanche, Fantom, Gnosis
• Solana, Sui, Aptos (via Wormhole)

Risk Controls:

• Bridge failure protection — auto-recover or refund detection
• Maximum bridge exposure at any time
• Minimum profit after all fees (gas + bridge + swap)
• Bridge liveness monitoring — skip offline bridges
• Inventory management across chains

Tech Stack:

• TypeScript + ethers.js + @solana/web3.js
• Bridge SDKs (Wormhole, Stargate, Across)
• Redis for opportunity queue
• PostgreSQL for trade history
• React dashboard with multi-chain view
• Docker Compose deployment