Trait trie_db::HashDBRef

pub trait HashDBRef<H, T> where
    H: Hasher, {
    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.

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Implementors

impl<'a, H, T> HashDBRef<H, T> for &'a (dyn HashDB<H, T> + 'a) where
    H: Hasher, 

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

impl<'a, H, T> HashDBRef<H, T> for &'a mut (dyn HashDB<H, T> + 'a) where
    H: Hasher, 

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

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