Building an MEV-Protected WebSocket Arbitrage Scanner on Base: A Technical Deep Dive
A comprehensive guide to building a real-time arbitrage scanner with Flashbots Protect integration for sub-millisecond execution on Base L2. Introduction Decentralized exchanges (DEXs) on Layer 2 networks like Base offer incredible opportunities for arbitrage traders. However, the same transparency that makes DeFi powerful also exposes traders to MEV (Maximal Extractable Value) attacks — where…
This technical guide explains how to create a real-time arbitrage scanner for the Base Layer 2 network. The scanner uses Flashbots Protect to prevent MEV attacks and execute profitable trades instantly. Key components include:
1. WebSocket connection to Base network for instant swap event monitoring
2. Spread calculator comparing prices across DEXs
3. Flashbots executor sending transactions through private RPC
4. Smart contract for atomic execution using flash loans
The system ensures zero risk of fund loss, as transactions revert if unprofitable. By monitoring prices in real-time and using Flashbots Protect, the scanner executes arbitrage opportunities without the risk of sandwich attacks.
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