Struct patricia_trie::FatDB
[−]
[src]
pub struct FatDB<'db> { /* fields omitted */ }A Trie implementation which hashes keys and uses a generic HashDB backing database.
Additionaly it stores inserted hash-key mappings for later retrieval.
Use it as a Trie or TrieMut trait object.
Methods
impl<'db> FatDB<'db>[src]
fn new(db: &'db HashDB, root: &'db H256) -> Result<Self>[src]
Create a new trie with the backing database db and empty root
Initialise to the state entailed by the genesis block.
This guarantees the trie is built correctly.
fn db(&self) -> &HashDB[src]
Get the backing database.
Trait Implementations
impl<'db> Trie for FatDB<'db>[src]
fn iter<'a>(&'a self) -> Result<Box<TrieIterator<Item = TrieItem> + 'a>>[src]
Returns a depth-first iterator over the elements of trie.
fn root(&self) -> &H256[src]
Return the root of the trie.
fn contains(&self, key: &[u8]) -> Result<bool>[src]
Does the trie contain a given key?
fn get_with<'a, 'key, Q: Query>(
&'a self,
key: &'key [u8],
query: Q
) -> Result<Option<Q::Item>> where
'a: 'key, [src]
&'a self,
key: &'key [u8],
query: Q
) -> Result<Option<Q::Item>> where
'a: 'key,
Search for the key with the given query parameter. See the docs of the Query trait for more details. Read more
fn is_empty(&self) -> bool[src]
Is the trie empty?
fn get<'a, 'key>(&'a self, key: &'key [u8]) -> Result<Option<DBValue>> where
'a: 'key, [src]
'a: 'key,
What is the value of the given key in this trie?