[−][src]Struct trie_db::FatDB
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, H, C> FatDB<'db, H, C> where
H: Hasher,
C: NodeCodec<H>,
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H: Hasher,
C: NodeCodec<H>,
pub fn new(
db: &'db dyn HashDBRef<H, DBValue>,
root: &'db H::Out
) -> Result<Self, H::Out, C::Error>
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db: &'db dyn HashDBRef<H, DBValue>,
root: &'db H::Out
) -> Result<Self, H::Out, C::Error>
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.
pub fn db(&self) -> &dyn HashDBRef<H, DBValue>
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Get the backing database.
Trait Implementations
impl<'db, H, C> Trie<H, C> for FatDB<'db, H, C> where
H: Hasher,
C: NodeCodec<H>,
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H: Hasher,
C: NodeCodec<H>,
fn root(&self) -> &H::Out
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fn contains(&self, key: &[u8]) -> Result<bool, H::Out, C::Error>
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fn get_with<'a, 'key, Q: Query<H>>(
&'a self,
key: &'key [u8],
query: Q
) -> Result<Option<Q::Item>, H::Out, C::Error> where
'a: 'key,
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&'a self,
key: &'key [u8],
query: Q
) -> Result<Option<Q::Item>, H::Out, C::Error> where
'a: 'key,
fn iter<'a>(
&'a self
) -> Result<Box<dyn TrieIterator<H, C, Item = TrieItem<H::Out, C::Error>> + 'a>, <H as Hasher>::Out, C::Error>
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&'a self
) -> Result<Box<dyn TrieIterator<H, C, Item = TrieItem<H::Out, C::Error>> + 'a>, <H as Hasher>::Out, C::Error>
fn is_empty(&self) -> bool
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Is the trie empty?
fn get<'a, 'key>(
&'a self,
key: &'key [u8]
) -> Result<Option<DBValue>, H::Out, C::Error> where
'a: 'key,
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&'a self,
key: &'key [u8]
) -> Result<Option<DBValue>, H::Out, C::Error> where
'a: 'key,
What is the value of the given key in this trie?
Auto Trait Implementations
Blanket Implementations
impl<T, U> Into for T where
U: From<T>,
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U: From<T>,
impl<T> From for T
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impl<T, U> TryFrom for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T> Borrow for T where
T: ?Sized,
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T: ?Sized,
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> BorrowMut for T where
T: ?Sized,
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T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
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impl<T, U> TryInto for T where
U: TryFrom<T>,
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U: TryFrom<T>,