Struct sc_offchain::OffchainDb

pub struct OffchainDb<Storage> { /* fields omitted */ }

Offchain DB reference.

Implementations

impl<Storage: OffchainStorage> Db<Storage>

pub fn new(persistent: Storage) -> Self

Create new instance of Offchain DB.

pub fn factory_from_backend<Backend, Block>(
    backend: &Backend
) -> Option<Box<dyn DbExternalitiesFactory>> where
    Backend: Backend<Block, OffchainStorage = Storage>,
    Block: Block,
    Storage: 'static, 

Create new instance of Offchain DB, backed by given backend.

Trait Implementations

impl<Storage: Clone> Clone for Db<Storage>

fn clone(&self) -> Db<Storage>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<Storage: OffchainStorage> DbExternalities for Db<Storage>

fn local_storage_set(&mut self, kind: StorageKind, key: &[u8], value: &[u8])

Sets a value in the local storage.

fn local_storage_clear(&mut self, kind: StorageKind, key: &[u8])

Removes a value in the local storage.

fn local_storage_compare_and_set(
    &mut self,
    kind: StorageKind,
    key: &[u8],
    old_value: Option<&[u8]>,
    new_value: &[u8]
) -> bool

Sets a value in the local storage if it matches current value.

fn local_storage_get(
    &mut self,
    kind: StorageKind,
    key: &[u8]
) -> Option<Vec<u8>>

Gets a value from the local storage.

impl<Storage: Debug> Debug for Db<Storage>

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

Formats the value using the given formatter.