Struct patricia_trie::Lookup

pub struct Lookup<'a, H: Hasher + 'a, C: NodeCodec<H>, Q: Query<H>> {
    pub db: &'a HashDB<H, DBValue>,
    pub query: Q,
    pub hash: H::Out,
    pub marker: PhantomData<C>,
}

Trie lookup helper object.

Fields

db: &'a HashDB<H, DBValue>

database to query from.

query: Q

Query object to record nodes and transform data.

hash: H::Out

Hash to start at

marker: PhantomData<C>

Methods

impl<'a, H, C, Q> Lookup<'a, H, C, Q> where     H: Hasher + 'a,     C: NodeCodec<H> + 'a,     Q: Query<H>,

pub fn look_up(     self,     key: NibbleSlice ) -> Result<Option<Q::Item>, H::Out, C::Error>

Look up the given key. If the value is found, it will be passed to the given function to decode or copy.