Enum sp_core::offchain::storage::OffchainOverlayedChanges

pub enum OffchainOverlayedChanges {
    Disabled,
    Enabled(HashMap<(Vec<u8>, Vec<u8>), OffchainOverlayedChange>),
}

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

Variants

Disabled

Writing overlay changes to the offchain worker database is disabled by configuration.

Enabled(HashMap<(Vec<u8>, Vec<u8>), OffchainOverlayedChange>)

Overlay changes can be recorded using the inner collection of this variant, where the identifier is the tuple of (prefix, key).

Implementations

impl OffchainOverlayedChanges

pub fn disabled() -> Self

Create the disabled variant.

pub fn enabled() -> Self

Create the enabled variant.

pub fn into_iter(self) -> OffchainOverlayedChangesIntoIter

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

pub fn iter<'a>(&'a self) -> OffchainOverlayedChangesIter<'_>

Iterate over all key value pairs by reference.

pub fn drain<'a, 'd>(&'a mut self) -> OffchainOverlayedChangesDrain<'d> where
    'a: 'd, 

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

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

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() -> Self

Returns the "default value" for a type.