[−][src]Trait cosmwasm_std::ReadonlyStorage

pub trait ReadonlyStorage {
    fn get(&self, key: &[u8]) -> StdResult<Option<Vec<u8>>>;
}

ReadonlyStorage is access to the contracts persistent data store

Required methods

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

Returns Err on error. Returns Ok(None) when key does not exist. Returns Ok(Some(Vec)) when key exists.

Note: Support for differentiating between a non-existent key and a key with empty value is not great yet and might not be possible in all backends. But we're trying to get there.

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Implementors

`impl ReadonlyStorage for MemoryStorage`[src]

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