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testMain.rs - Token Detection + Auto Swap

Combines historical token detection with immediate Uniswap V2 swapping using WebSocket for maximum speed.

Setup

  1. Ensure you have unlimited USDC approval for Uniswap V2 router
  2. Set required environment variables in .env:
# WebSocket URL (used for both detection and swapping)
WSS_URL=wss://your-base-websocket-url
PRIVATE_KEY=your_private_key_here

# Optional: Transaction verification (default: true)
USE_TX_VERIFICATION=true

Usage

# Test specific block range and auto-swap detected tokens
cargo run --bin testMain <from_block> <to_block>

# Example: Test blocks 30948300 to 30948600
cargo run --bin testMain 30948300 30948600

Speed Optimization

WebSocket vs HTTP RPC Speed Comparison:

Connection Type Latency Use Case Speed
WebSocket (WSS) ~10-50ms Sniping/Real-time ⚡ FASTEST
HTTP RPC ~50-200ms Regular trading 🐌 Slower

Why WebSocket is Faster:

  • Persistent Connection: No connection overhead per request
  • Lower Latency: Direct pipeline to blockchain node
  • Real-time: Ideal for time-sensitive operations like sniping
  • Reduced Network Overhead: No HTTP headers per transaction

How It Works

  1. Token Detection: Uses testDetector logic to scan historical blocks for token deployments
  2. Immediate Swapping: When a token is detected, automatically swaps 1 USDC for the new token via WebSocket
  3. Clean Output: Minimal logging focused on detection and swap results

Configuration

  • Connection: WebSocket only (fastest for sniping)
  • Swap Amount: 1 USDC (1,000,000 units with 6 decimals)
  • Slippage: Accepts any amount of output tokens (amount_out_min = 1)
  • Gas: Uses turbo gas settings for fastest execution
  • Deadline: 5 minutes from swap initiation

Expected Output

🚀 Starting token detection and auto-swap system
✅ Uniswap trader initialized (WebSocket)
✅ Token detector initialized
🔍 Testing block range: 30948300 to 30948600
📊 Found 1 logs in block range 30948300 to 30948600
🔍 Block 30948304: Found token: 0x44aa51452b267c81ed99f0ef2bdc7c8ba47ee1a2 (confidence: Verify)
✅ Block 30948304: VERIFIED token detected: 0x44aa51452b267c81ed99f0ef2bdc7c8ba47ee1a2
🎯 Detected 1 token(s), executing swaps...
🔄 Executing swap for detected token: 0x44aa51452b267c81ed99f0ef2bdc7c8ba47ee1a2
💱 Swapping 1 USDC for 0x44aa51452b267c81ed99f0ef2bdc7c8ba47ee1a2 via WebSocket
🎯 Swap successful! Tx: 0x...
✅ Swap completed for token: 0x44aa51452b267c81ed99f0ef2bdc7c8ba47ee1a2

Requirements

  • USDC balance in wallet
  • Unlimited USDC approval to Uniswap V2 router
  • WebSocket endpoint for Base network (faster than HTTP RPC)
  • Private key with sufficient ETH for gas

Performance Tips

  1. Use High-Quality WSS Endpoints:

    • Alchemy WebSocket: wss://base-mainnet.g.alchemy.com/v2/YOUR_KEY
    • QuickNode WebSocket: wss://your-endpoint.base.quiknode.pro/YOUR_KEY/

  2. Avoid Public WSS (slower and rate-limited)

  3. For Maximum Speed:

    • Use paid WSS provider (Alchemy, QuickNode, Infura)
    • Choose provider geographically close to you
    • Use turbo gas settings

Safety Notes

  • Only swaps detected tokens that pass confidence checks
  • Uses minimal swap amounts for testing
  • Includes 5-minute deadline protection
  • No approval needed (assumes pre-approved USDC)
  • WebSocket connection for lowest possible latency