Trait trie_db::HashDBRef

pub trait HashDBRef<H, T>
where
    H: Hasher,
{
    // Required methods
    fn get(
        &self,
        key: &<H as Hasher>::Out,
        prefix: (&[u8], Option<u8>),
    ) -> Option<T>;
    fn contains(
        &self,
        key: &<H as Hasher>::Out,
        prefix: (&[u8], Option<u8>),
    ) -> bool;
}

Trait for immutable reference of HashDB.

Required Methods

fn get( &self, key: &<H as Hasher>::Out, prefix: (&[u8], Option<u8>), ) -> Option<T>

Look up a given hash into the bytes that hash to it, returning None if the hash is not known.

fn contains( &self, key: &<H as Hasher>::Out, prefix: (&[u8], Option<u8>), ) -> bool

Check for the existance of a hash-key.

Implementors

impl<'a, H, T> HashDBRef<H, T> for &'a dyn HashDB<H, T>

where H: Hasher,

impl<'a, H, T> HashDBRef<H, T> for &'a mut dyn HashDB<H, T>

where H: Hasher,

impl<H, KF, T> HashDBRef<H, T> for MemoryDB<H, KF, T>

where H: KeyHasher, T: Default + PartialEq<T> + AsRef<[u8]> + for<'a> From<&'a [u8]> + Clone + Send + Sync, KF: KeyFunction<H> + Send + Sync,

impl<'a, DB, H, T> HashDBRef<H, T> for KeySpacedDB<'a, DB, H>

where DB: HashDBRef<H, T> + ?Sized, H: Hasher, T: From<&'static [u8]>,