[][src]Enum sp_core::offchain::storage::OffchainOverlayedChanges

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

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



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).


impl OffchainOverlayedChanges[src]

pub fn disabled() -> Self[src]

Create the disabled variant.

pub fn enabled() -> Self[src]

Create the enabled variant.

pub fn into_iter(self) -> OffchainOverlayedChangesIntoIter[src]

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

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

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])[src]

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

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

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

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

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

Trait Implementations

impl Clone for OffchainOverlayedChanges[src]

impl Debug for OffchainOverlayedChanges[src]

impl Default for OffchainOverlayedChanges[src]

Auto Trait Implementations

impl RefUnwindSafe for OffchainOverlayedChanges[src]

impl Send for OffchainOverlayedChanges[src]

impl Sync for OffchainOverlayedChanges[src]

impl Unpin for OffchainOverlayedChanges[src]

impl UnwindSafe for OffchainOverlayedChanges[src]

Blanket Implementations

impl<T> Any for T where
    T: 'static + ?Sized

impl<T> Borrow<T> for T where
    T: ?Sized

impl<T> BorrowMut<T> for T where
    T: ?Sized

impl<T> DynClone for T where
    T: Clone

impl<T> From<T> for T[src]

impl<T> Instrument for T[src]

impl<T, U> Into<U> for T where
    U: From<T>, 

impl<T, Outer> IsWrappedBy<Outer> for T where
    T: From<Outer>,
    Outer: AsRef<T> + AsMut<T> + From<T>, 

pub fn from_ref(&Outer) -> &T[src]

Get a reference to the inner from the outer.

pub fn from_mut(&mut Outer) -> &mut T[src]

Get a mutable reference to the inner from the outer.

impl<T> MaybeDebug for T where
    T: Debug

impl<T> MaybeRefUnwindSafe for T where
    T: RefUnwindSafe

impl<T> Same<T> for T

type Output = T

Should always be Self

impl<T> ToOwned for T where
    T: Clone

type Owned = T

The resulting type after obtaining ownership.

impl<T, U> TryFrom<U> for T where
    U: Into<T>, 

type Error = Infallible

The type returned in the event of a conversion error.

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, 

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

impl<S, T> UncheckedInto<T> for S where
    T: UncheckedFrom<S>, 

impl<V, T> VZip<V> for T where
    V: MultiLane<T>,