Struct ValueState 

pub struct ValueState<B>
where
    B: StateBackend,
{ /* private fields */ }

Value state (stores a single value per key).

Implementations

impl<B> ValueState<B>

where B: StateBackend,

pub fn new(backend: Arc<B>, namespace: String, key: Vec<u8>) -> Self

Create a new value state.

pub async fn get(&self) -> Result<Option<Vec<u8>>>

Get the value.

pub async fn set(&self, value: Vec<u8>) -> Result<()>

Set the value.

pub async fn update<F>(&self, f: F) -> Result<()>

where F: FnOnce(Option<Vec<u8>>) -> Vec<u8>,

Update the value using a function.

Trait Implementations

impl<B> KeyedState for ValueState<B>

where B: StateBackend,

fn key(&self) -> &[u8]

Get the state key.

async fn clear(&self) -> Result<()>

Clear the state.