Struct sp_state_machine::OffchainOverlayedChanges

pub struct OffchainOverlayedChanges(/* private fields */);

In-memory storage for offchain workers recoding changes for the actual offchain storage implementation.

Implementations

impl OffchainOverlayedChanges

pub fn into_iter( self, ) -> impl Iterator<Item = ((Vec<u8>, Vec<u8>), OffchainOverlayedChange)>

Consume the offchain storage and iterate over all key value pairs.

pub fn iter( &mut self, ) -> impl Iterator<Item = (&'_ (Vec<u8>, Vec<u8>), &'_ OffchainOverlayedChange)>

Iterate over all key value pairs by reference.

pub fn drain( &mut self, ) -> impl Iterator<Item = ((Vec<u8>, Vec<u8>), OffchainOverlayedChange)>

Drain all elements of changeset.

pub fn remove(&mut self, prefix: &[u8], key: &[u8])

Remove a key and its associated value from the offchain database.

pub fn set(&mut self, prefix: &[u8], key: &[u8], value: &[u8])

Set the value associated with a key under a prefix to the value provided.

pub fn get( &mut self, prefix: &[u8], key: &[u8], ) -> Option<OffchainOverlayedChange>

Obtain a associated value to the given key in storage with prefix.

pub fn overlay( &self, ) -> &OverlayedMap<(Vec<u8>, Vec<u8>), OffchainOverlayedChange>

Reference to inner change set.

pub fn overlay_mut( &mut self, ) -> &mut OverlayedMap<(Vec<u8>, Vec<u8>), OffchainOverlayedChange>

Mutable reference to inner change set.

Trait Implementations

impl Clone for OffchainOverlayedChanges

fn clone(&self) -> OffchainOverlayedChanges

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for OffchainOverlayedChanges

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

Formats the value using the given formatter.

impl Default for OffchainOverlayedChanges

fn default() -> OffchainOverlayedChanges

Returns the “default value” for a type.