WTH (What the Hook?) is a live Uniswap v4 swap rebate hook deployed on Robinhood Chain that internalizes cross-pool arbitrage profit and redistributes it to the traders and liquidity providers who created the opportunity — rather than allowing external bots to extract it. When a swap creates a price gap between connected pools, WTH's on-chain hook detects, captures, and settles the correction within the same transaction. Realized profit is split automatically: traders receive rebates on their trades, and liquidity providers earn a larger share streamed directly into connected pools. Third-party token projects can integrate by deploying two or more v4 pools with the WTH hook attached at creation, immediately unlocking the full rebate and LP reward mechanic. No off-chain infrastructure, no private RPC, and no guaranteed yield — only on-chain, verifiable value redistribution from completed arbitrage cycles.