Struct PrefixedStorage

pub struct PrefixedStorage<'a> { /* private fields */ }

👎Deprecated: The crate cosmwasm-storage is unmaintained and will be removed in CosmWasm 2.0. Please consider migrating to cw-storage-plus or simple cosmwasm-std storage calls.

Implementations

impl<'a> PrefixedStorage<'a>

pub fn new(storage: &'a mut dyn Storage, namespace: &[u8]) -> Self

pub fn multilevel(storage: &'a mut dyn Storage, namespaces: &[&[u8]]) -> Self

Trait Implementations

impl<'a> Storage for PrefixedStorage<'a>

fn range<'b>( &'b self, start: Option<&[u8]>, end: Option<&[u8]>, order: Order, ) -> Box<dyn Iterator<Item = Record> + 'b>

range allows iteration over a set of keys, either forwards or backwards uses standard rust range notation, and eg db.range(b“foo“..b“bar“) also works reverse

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

Returns None when key does not exist. Returns Some(Vec) when key exists.

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

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

Removes a database entry at key.

fn range_keys<'a>( &'a self, start: Option<&[u8]>, end: Option<&[u8]>, order: Order, ) -> Box<dyn Iterator<Item = Vec<u8>> + 'a>

Allows iteration over a set of keys, either forwards or backwards.

fn range_values<'a>( &'a self, start: Option<&[u8]>, end: Option<&[u8]>, order: Order, ) -> Box<dyn Iterator<Item = Vec<u8>> + 'a>

Allows iteration over a set of values, either forwards or backwards.