Struct sp_runtime::offchain::testing::TestPersistentOffchainDB

[+] Show declaration

pub struct TestPersistentOffchainDB { /* fields omitted */ }

[−] Expand description

Sharable "persistent" offchain storage for test.

Implementations

impl TestPersistentOffchainDB[−]

pub fn new() -> TestPersistentOffchainDB[−]

Create a new and empty offchain storage db for persistent items

pub fn apply_offchain_changes(&mut self, changes: &mut OffchainOverlayedChanges)[−]

Apply a set of off-chain changes directly to the test backend

Trait Implementations

impl Clone for TestPersistentOffchainDB[+]

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fn clone(&self) -> TestPersistentOffchainDB[−]

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)[−]

Performs copy-assignment from source.

impl Debug for TestPersistentOffchainDB[+]

[+] Show hidden undocumented items

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

Formats the value using the given formatter.

impl Default for TestPersistentOffchainDB[+]

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fn default() -> TestPersistentOffchainDB[−]

Returns the "default value" for a type.

impl OffchainStorage for TestPersistentOffchainDB[+]

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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.