DEX Liquidity Sniper

A mempool-monitoring sniper bot that detects new liquidity pool creation events on Uniswap V2/V3 (Ethereum) and Raydium (Solana) and executes buy transactions in the same block — before most traders even see the pair listed.

How It Works:

1. Monitors pending transactions in the mempool for addLiquidity / createPool calls
2. Simulates the token contract for rug-pull checks before buying
3. Submits a high-priority buy transaction bundled in the same block
4. Monitors position and auto-sells at configurable take-profit levels

Anti-Rug Protection:

• Honeypot simulation — tests sell functionality before committing capital
• Ownership renounce check — flags tokens where owner can mint or pause
• Max tax filter — rejects tokens with buy/sell tax above your threshold
• Liquidity lock verification — checks if LP tokens are locked
• Max wallet / max tx detection

Sniper Features:

• Same-block execution — buys land in the same block as liquidity addition
• Gas bidding — configurable gas multiplier or fixed priority fee
• Multi-wallet rotation — spread buys across wallets to avoid detection
• Take-profit ladder — sell 25% at 2x, 25% at 5x, 50% at 10x (fully configurable)
• Trailing stop-loss — locks in profits on the way up
• Pair filtering — whitelist specific base tokens (WETH, USDC, SOL)

Supported DEXs:

• Uniswap V2 and V3 (Ethereum mainnet)
• Raydium AMM and CLMM (Solana)
• PancakeSwap V2 (BSC) — community module

Tech Stack:

• TypeScript + ethers.js / @solana/web3.js
• WebSocket mempool subscriptions
• SQLite trade journal
• Telegram alert integration
• Docker deployment

Safety:

• Paper trading mode by default
• Max spend per snipe configurable
• Daily max loss limit
• Kill switch command via Telegram

Full source code with documentation. Average snipe-to-fill latency: ~200ms on Ethereum, ~400ms on Solana.