Ghost Engine — MEV-Resistant Uniswap v4 Hook
Maxwell Demon's Team
Problem Statement
DEX users face three execution problems that dont exist on centralized exchanges: (1) large orders cause massive slippage because AMMs are constant-product, (2) TWAP orders dont exist on-chain — users rely on fragmented off-chain bots, and (3) every swap is visible in the mempool, enabling MEV bots to front-run and sandwich for profit. Ghost Engine solves all three by creating a virtual order book inside a Uniswap v4 hook where orders accumulate as invisible ghost liquidity, fill at TWAP with zero slippage, and net opposing flows internally — all within a single atomic swap transaction.
Ghost Engine is a MEV-resistant matching engine that runs inside a Uniswap v4 hook. It aggregates passive liquidity from TWAP stream orders, limit orders, and opposing flows into virtual "ghost balances" — invisible to MEV searchers until filled. Every incoming swap triggers a 5-phase pipeline: ACCRUE → NET → CROSS → ACTIVATE → FILL. Ghost liquidity fills the swap at TWAP price (zero slippage), and only the unfilled remainder passes to the AMM. ## Key Features - **TWAP Streams**: Drip-sell tokens over time at constant rate, O(1) accrual - **Limit Orders**: Activate when TWAP crosses tick, fill from ghost pool - **Internal Netting**: Opposing streams cancel at TWAP — zero gas, zero MEV - **Token Escrow**: Full PoolManager settlement via sync→transfer→settle / take - **Uniswap API Solver**: Python bot that monitors ghost state vs market prices for arbitrage ## Live on Unichain Sepolia - GhostHook: 0x7c1d6541482fE64e4D73069B0d7D73C408Eee0c8 - 16 on-chain transactions proving end-to-end functionality - 15/15 CEX-like verification tests pass (perfect 1.0 fill price at TWAP) - Differential fuzzing: 208 vectors, 0 divergence between Python reference and Solidity
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Maxwell Demon
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Intention
Plans to continue
Planning to deploy to Unichain mainnet, add clearing auction (Layer 3), and integrate with Uniswap frontend as a custom pool type