Struct trie_db::triedb::TrieDB[][src]

pub struct TrieDB<'db, L> where
    L: TrieLayout
{ /* fields omitted */ }

A Trie implementation using a generic HashDB backing database, a Hasher implementation to generate keys and a NodeCodec implementation to encode/decode the nodes.

Use it as a Trie trait object. You can use db() to get the backing database object. Use get and contains to query values associated with keys in the trie.

Example

use hash_db::Hasher;
use reference_trie::{RefTrieDBMut, RefTrieDB, Trie, TrieMut};
use trie_db::DBValue;
use keccak_hasher::KeccakHasher;
use memory_db::*;

let mut memdb = MemoryDB::<KeccakHasher, HashKey<_>, _>::default();
let mut root = Default::default();
RefTrieDBMut::new(&mut memdb, &mut root).insert(b"foo", b"bar").unwrap();
let t = RefTrieDB::new(&memdb, &root).unwrap();
assert!(t.contains(b"foo").unwrap());
assert_eq!(t.get(b"foo").unwrap().unwrap(), b"bar".to_vec());

Implementations

impl<'db, L> TrieDB<'db, L> where
    L: TrieLayout
[src]

pub fn new(
    db: &'db dyn HashDBRef<L::Hash, DBValue>,
    root: &'db TrieHash<L>
) -> Result<Self, TrieHash<L>, CError<L>>
[src]

Create a new trie with the backing database db and root Returns an error if root does not exist

pub fn db(&'db self) -> &'db dyn HashDBRef<L::Hash, DBValue>[src]

Get the backing database.

Trait Implementations

impl<'db, L> Debug for TrieDB<'db, L> where
    L: TrieLayout
[src]

impl<'db, L> Trie<L> for TrieDB<'db, L> where
    L: TrieLayout
[src]

Auto Trait Implementations

impl<'db, L> !RefUnwindSafe for TrieDB<'db, L>

impl<'db, L> !Send for TrieDB<'db, L>

impl<'db, L> !Sync for TrieDB<'db, L>

impl<'db, L> Unpin for TrieDB<'db, L>

impl<'db, L> !UnwindSafe for TrieDB<'db, L>

Blanket Implementations

impl<T> Any for T where
    T: 'static + ?Sized
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impl<T> Borrow<T> for T where
    T: ?Sized
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impl<T> BorrowMut<T> for T where
    T: ?Sized
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impl<T> From<T> for T[src]

impl<T, U> Into<U> for T where
    U: From<T>, 
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impl<T> MaybeDebug for T where
    T: Debug
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impl<T, U> TryFrom<U> for T where
    U: Into<T>, 
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type Error = Infallible

The type returned in the event of a conversion error.

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, 
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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.