Module frame_support::storage::types [−][src]
Expand description
Storage types to build abstraction on storage, they implements storage traits such as StorageMap and others.
Structs
A type used exclusively by storage maps as their key type.
Implement QueryKindTrait with query being Option<Value>
A type that allow to store values for (key1, key2) couple. Similar to StorageMap but allow
to iterate and remove value associated to first key.
A type that allow to store value for given key. Allowing to insert/remove/iterate on values.
A type that allow to store values for an arbitrary number of keys in the form of
(Key<Hasher1, key1>, Key<Hasher2, key2>, ..., Key<HasherN, keyN>).
A type that allow to store a value.
Implement QueryKindTrait with query being Value
Traits
Marker trait to indicate that each element in the tuple encodes like the corresponding element in another tuple.
Trait indicating whether a KeyGenerator has the prefix P.
Trait indicating whether a ReversibleKeyGenerator has the prefix P.
A trait that contains the current key as an associated type.
The maximum length used by the key in storage.
Trait implementing how the storage optional value is converted into the queried type.
A trait that indicates the hashers for the keys generated are all reversible.
Part of storage metadata for a storage double map.
Part of storage metadata for a storage map.
Part of storage metadata for a storage n map.
Part of storage metadata for storage value.
Trait to indicate that a tuple can be converted into an iterator of a vector of encoded bytes.