Struct sp_core::offchain::storage::InMemOffchainStorage

pub struct InMemOffchainStorage { /* private fields */ }

In-memory storage for offchain workers.

Implementations

impl InMemOffchainStorage

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

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

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

Iterate over all key value pairs by reference.

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

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

Trait Implementations

impl Clone for InMemOffchainStorage

fn clone(&self) -> InMemOffchainStorage

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for InMemOffchainStorage

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

Formats the value using the given formatter.

impl Default for InMemOffchainStorage

fn default() -> InMemOffchainStorage

Returns the “default value” for a type.

impl OffchainStorage for InMemOffchainStorage

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

Persist a value in storage under given key and prefix.

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

Clear a storage entry under given key and prefix.

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

Retrieve a value from storage under given key and prefix.

fn compare_and_set(
    &mut self,
    prefix: &[u8],
    key: &[u8],
    old_value: Option<&[u8]>,
    new_value: &[u8]
) -> bool

Replace the value in storage if given old_value matches the current one.