Extending the Hook

ERC4626WrapperHook is designed to be subclassed at narrow seams:

• _redeemToUnderlying(wrappedAmount) is the overridable source of the unwrap leg. The default redeems directly from the vault. A subclass can add fallback sourcing, for example forcing liquidity back into a vault that keeps most assets deployed, while leaving the share take, the settle-to-PoolManager tail, and all accounting unchanged. The contract holds the shares on entry and must hold the received underlying on return.
• _deposit, the preview helpers, and _supportsExactOutput / _supportsExactInput are virtual for further specialization.