⚡ FlashArb — On-Chain Flash Loan Arbitrage Bot

Live arbitrage bot running on Base mainnet using flash loans. Scans 34 routes across Uniswap V3 and Aerodrome every ~2 seconds.

🔧 How It Works

1. Detects price gaps between Uniswap V3 and Aerodrome pools
2. Executes flash loan (zero capital required) via custom Solidity contract
3. Buys token on cheaper DEX → sells on expensive DEX → repays loan + keeps profit
4. Zero-loss shield: simulates tx before broadcasting — never loses ETH on failed arb

📊 Live Stats

• Network: Base Mainnet
• Routes Monitored: 34 (USDC, DEGEN, AERO, cbBTC, BRETT, VIRTUAL, ZORA + more)
• Scan Speed: ~200ms per block
• RPC: 4-account rotation (never hits rate limits)
• WebSocket: Real-time block streaming via eth_subscribe

🏗️ Stack

• Python (asyncio, aiohttp, websockets, web3.py)
• Solidity (Foundry) — custom FlashArb contract
• Base mainnet | Uniswap V3 QuoterV2 | Aerodrome Slipstream
• Oracle Cloud VPS (always-free tier)

📁 Structure

flasharb/
├── scanner/
│   ├── bot.py          # Main async scanner + executor
│   ├── find_pools.py   # Pool discovery script
│   └── withdraw.py     # Safe fund withdrawal
├── src/
│   └── FlashArb.sol    # Flash loan contract
└── foundry.toml

⚙️ Setup

cp scanner/.env.example scanner/.env  # fill in your keys
cd scanner && pip install -r requirements.txt
python3 bot.py

Built by @rahulkhunte