Type Definition frame::prelude::frame_system::BlockHash

pub type BlockHash<T>where
    T: Config, = StorageMap<_GeneratedPrefixForStorageBlockHash<T>, Twox64Concat, <<<T as Config>::Block as HeaderProvider>::HeaderT as Header>::Number, <T as Config>::Hash, ValueQuery, GetDefault, GetDefault>;

Map of block numbers to block hashes.

Storage type is [StorageMap] with key type BlockNumberFor < T > and value type T :: Hash.