v4-hook-permission-flags-mismatch

# Uniswap V4 hook permission-flag mismatch detection ## When this applies Trigger on any of: - Contracts inheriting `BaseHook` / implementing `IHooks` - An overridden `getHookPermissions()` returning a `Hooks.Permissions` struct - Implemented callbacks: `beforeSwap`, `afterSwap`, `beforeAddLiquidity`, `afterAddLiquidity`, `beforeRemoveLiquidity`, `afterRemoveLiquidity`, `beforeInitialize`, `afterInitialize`, `beforeDonate`, `afterDonate` - `*ReturnDelta` permission flags (`afterSwapReturnDelta`, `beforeSwapReturnDelta`, etc.) - CREATE2 / `HookMiner.find` salt mining to encode flags into the hook address - Pool initialization that passes the hook address to `PoolManager.initialize` ## Detection patterns ### Implemented callback whose flag bit is unset (HIGH) ```solidity function getHookPermissions() public pure override returns (Hooks.Permissions memory) { return Hooks.Permissions({ beforeSwap: true, afterSwap: false, /* ...all else false */ }); } function afterSwap(...) external override returns (bytes4, int128) { _accrueFees(...); // ← real logic, but afterSwap flag is FALSE return (this.afterSwap.selector, 0); } ``` The pool reads permissions from the hook *address bits*, not from the function table. With the `AFTER_SWAP` bit unset, the PoolManager never calls `afterSwap`; `_accrueFees` silently never runs. **Signal:** a callback is implemented (non-reverting body) but its corresponding permission is `false` / the address bit is unmined. ### Flag ...