Heartbeat
Reads recent pool activity, turns it into a bounded score, then recommends a fee response.
- OBSERVETick movement + swap frequency
- SCOREDecay keeps activity bounded
- RESPONDRecommend a dynamic LP fee

Meet Heartbeat, Liquidity Passport, FairFlow, and SplitStream—our flagship Uniswap v4 research hooks, explained visually from callback to outcome.
Each animated diagram follows the real research mechanism. The motion explains causality; the text remains complete when animation is disabled.
Reads recent pool activity, turns it into a bounded score, then recommends a fee response.
Records experimental participation signals without moving funds or claiming identity assurance.
Collects exact-input flow into deterministic epochs for honest REFUND_ONLY research settlement.
Routes a bounded exact-input hook fee into configured PoolManager claim recipients.
Browse educational hook patterns by problem surface, from fees and liquidity to oracle data and MEV protection.
Fee selection and swap-shaping primitives.
Guards for ordering, impact and adversarial flow.
Lifecycle controls and LP participation mechanics.
Onchain incentives and attribution systems.
Launch-phase constraints and liquidity policy.
Pool-native observation and defensive data reads.
Research concepts with unresolved design risk.
A pool that can feel market stress.
by HookHood LabsReputation for liquidity providers.
by HookHood LabsTrade together. Settle together.
by HookHood LabsProgrammable revenue routing for every swap.
by HookHood Labs