Poincaré is a Uniswap v4 hook. When the pool's own price confirms a trend, swaps pushing with it pay a spread of up to 5% that stays with liquidity providers; every other swap pays the plain pool price. No oracle, no keeper. Live on Unichain Sepolia, reviewed by SFS-Labs (independent scoped review) and Olympix (pre-audit scan).
Source code and research