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GRAPL’s local LaunchHook enforces initialization and swap rules in Uniswap v4. Its address enables exactly two callbacks: beforeInitialize and beforeSwap. The official Uniswap hook model explains callback permission bits.
Only an authorized factory can initialize a registered launch pool. This prevents pre-initialization of predictable future token pools with a different price.

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Trade execution

The router supports exact-input swaps through registered pools, with a deadline, minimum output and maximum protocol fee. It settles actual v4 currency deltas before recording rewards. Partial fills pay protocol fees on executed GRAPL volume. On a buy, the protocol fee is additional GRAPL input. On a sell, it comes from GRAPL received, requires allowance and is included in net minimum output. The LP fee is separate. Failure in settlement, fees or rewards reverts the entire transaction.

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Fixed integration, explicit powers

This implementation has no proxy upgrade, arbitrary external call, replaceable hook module or custom swap-return delta. Registry entries and hook/router dependencies are fixed once created. Administrators can change roles and pause protocol modules. Those powers affect operation; see security and authority. No external audit or AI safety guarantee is claimed. Modular hooks and AI-assisted review remain research proposals. Current addresses exist only in the local deployment; public-chain status is tracked under supported chains.