Struct Cache

pub struct Cache { /* private fields */ }

A cache of changes to the state of the blockchain.

A StateDelta is Cache above a StateRead.

Implementations

impl Cache

pub fn unwritten_changes(&self) -> &BTreeMap<String, Option<Vec<u8>>>

Inspect the cache of unwritten changes to the verifiable state.

pub fn nonverifiable_changes(&self) -> &BTreeMap<Vec<u8>, Option<Vec<u8>>>

Inspect the cache of unwritten changes to the nonverifiable state.

pub fn merge(&mut self, other: Cache)

Merge the given cache with this one, taking its writes in place of ours.

pub fn apply_to<S: StateWrite>(self, state: S)

Consume this cache, applying its writes to the given state.

pub fn is_dirty(&self) -> bool

Returns true if there are cached writes on top of the snapshot, and false otherwise.

pub fn take_events(&mut self) -> Vec<Event>

Extracts and returns the ABCI events contained in this cache.

pub fn shard_by_prefix( self, prefixes: &MultistoreConfig, ) -> BTreeMap<Arc<SubstoreConfig>, Self>

Consumes a Cache and returns a map of SubstoreConfig to Cache that corresponds to changes belonging to each substore. The keys in each Cache are truncated to remove the substore prefix.

Trait Implementations

impl Debug for Cache

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

Formats the value using the given formatter.

impl Default for Cache

fn default() -> Cache

Returns the “default value” for a type.