Struct cosmwasm_storage::Singleton [−][src]
pub struct Singleton<'a, T> where
T: Serialize + DeserializeOwned, { /* fields omitted */ }
Expand description
Singleton effectively combines PrefixedStorage with TypedStorage to work on a single storage key. It performs the to_length_prefixed transformation on the given name to ensure no collisions, and then provides the standard TypedStorage accessors, without requiring a key (which is defined in the constructor)
Implementations
save will serialize the model and store, returns an error on serialization issues
load will return an error if no data is set at the given key, or on parse error
may_load will parse the data stored at the key if present, returns Ok(None) if no data there. returns an error on issues parsing
update will load the data, perform the specified action, and store the result in the database. This is shorthand for some common sequences, which may be useful
This is the least stable of the APIs, and definitely needs some usage