Function withdrawals_root 

pub fn withdrawals_root<DB>(
    state_updates: &BundleState,
    state: DB,
) -> Result<FixedBytes<32>, ProviderError>
where
    DB: StorageRootProvider,

Computes the storage root of predeploy L2ToL1MessagePasser.sol.

Uses state updates from block execution. See also withdrawals_root_prehashed.