Slippage Guard

Pre-trade simulation and slippage protection smart contract module.

Product 4 of the defi-router store. Part of the CryptoForge DeFi toolkit.

Price: $7.99 | License: MIT | Solidity: ^0.8.24 | Framework: Foundry

Overview

SlippageGuard is a composable smart contract module that wraps any DEX router call with slippage validation, oracle-based price impact checks, and pre-trade simulation. It measures actual swap outcomes using a balance-diff pattern, enforces maximum slippage tolerances, and compares execution prices against Chainlink oracle feeds.

Key Features

• Balance-diff slippage protection — Snapshots token balance before/after swap, validates minimum output
• Oracle price impact validation — Compares execution rate vs Chainlink oracle price to detect MEV/manipulation
• Pre-trade simulation — Estimates swap output via call execution before committing
• Composable design — Works with any DEX router (Uniswap, SushiSwap, 1inch, etc.)
• Fee-on-transfer support — Balance-diff pattern correctly measures actual received amounts
• Ownable2Step — Two-step ownership transfer prevents accidental admin loss
• Emergency pause — Halts guarded swaps while keeping view functions operational
• ReentrancyGuard + CEI — All state-changing functions are reentrant-safe