Struct basecoin_store::impls::InMemoryStore

pub struct InMemoryStore { /* private fields */ }

An in-memory store backed by an AvlTree.

InMemoryStore has two copies of the current working store - staged and pending.

Each transaction works on the pending copy. When a transaction returns:

• If it succeeded, the store applies the transaction changes by copying pending to staged.
• If it failed, the store reverts the transaction changes by copying staged to pending.

When a block is committed, the staged copy is copied into the committed store.

Note that this store implementation is not production-friendly. After each transaction, the entire store is copied from pending to staged, or from staged to pending.

Trait Implementations

impl Clone for InMemoryStore

fn clone(&self) -> InMemoryStore

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for InMemoryStore

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

Formats the value using the given formatter.

impl Default for InMemoryStore

fn default() -> Self

The store starts out with an empty state. We also initialize the pending location as empty.

impl ProvableStore for InMemoryStore

fn root_hash(&self) -> Vec<u8>

Return a vector commitment

fn get_proof(&self, height: Height, key: &Path) -> Option<CommitmentProof>

Return proof of existence for key

impl Store for InMemoryStore

type Error = Infallible

Error type - expected to envelope all possible errors in store

fn set( &mut self, path: Path, value: Vec<u8> ) -> Result<Option<Vec<u8>>, Self::Error>

Set value for path

fn get(&self, height: Height, path: &Path) -> Option<Vec<u8>>

Get associated value for path at specified height

fn delete(&mut self, path: &Path)

Delete specified path

fn commit(&mut self) -> Result<Vec<u8>, Self::Error>

Commit Pending block to canonical chain and create new Pending

fn apply(&mut self) -> Result<(), Self::Error>

Apply accumulated changes to Pending

fn reset(&mut self)

Reset accumulated changes

fn prune(&mut self, height: RawHeight) -> Result<RawHeight, Self::Error>

Prune historic blocks upto specified height

fn current_height(&self) -> u64

Return the current height of the chain

fn get_keys(&self, key_prefix: &Path) -> Vec<Path>

Return all keys that start with specified prefix