Struct scratchpad::SparseMerkleTree

impl<V> SparseMerkleTree<V>
where V: Clone + CryptoHash,

pub fn new(root_hash: HashValue) -> Self

Constructs a Sparse Merkle Tree with a root hash. This is often used when we restart and the scratch pad and the storage have identical state, so we use a single root hash to represent the entire state.

pub fn update( &self, updates: Vec<(HashValue, V)>, proof_reader: &impl ProofRead<V> ) -> Result<Self, UpdateError>

Constructs a new Sparse Merkle Tree as if we are updating the existing tree. Since the tree is immutable, the existing tree will remain the same and may share part of the tree with the new one.

pub fn batch_update( &self, update_batch: Vec<Vec<(HashValue, &V)>>, proof_reader: &impl ProofRead<V> ) -> Result<(Vec<HashValue>, Self), UpdateError>

Constructs a new Sparse Merkle Tree as if we are updating the existing tree multiple times with update_batch. The function will return the root hash of each individual update and a Sparse Merkle Tree of the final state.

The update_batch will take in a reference of value instead of an owned instance. This is because it would be nicer for future parallelism.

pub fn get(&self, key: HashValue) -> AccountStatus<V>

Queries a key in this SparseMerkleTree.

pub fn root_hash(&self) -> HashValue

Returns the root hash of this tree.

pub fn prune(&self)

Mark that all the nodes created by this tree and its ancestors are persisted in the DB.

Trait Implementations§

impl<V: Clone> Clone for SparseMerkleTree<V>

fn clone(&self) -> SparseMerkleTree<V>

Returns a copy of the value. Read more

1.0.0 · source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more

impl<V: Debug> Debug for SparseMerkleTree<V>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more

impl<V> Default for SparseMerkleTree<V>
where V: Clone + CryptoHash,

fn default() -> Self

Returns the “default value” for a type. Read more

Auto Trait Implementations§

impl<V> UnwindSafe for SparseMerkleTree<V>
where V: RefUnwindSafe,

Blanket Implementations§

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