Struct StorageMut

pub struct StorageMut<'a, T: 'a + ?Sized, Type: Mappable>(/* private fields */);

The wrapper around the storage that supports methods from StorageInspect and StorageMutate.

Implementations

impl<'a, T: StorageInspect<Type>, Type: Mappable> StorageMut<'a, T, Type>

pub fn get( self, key: &Type::Key, ) -> Result<Option<Cow<'a, Type::OwnedValue>>, T::Error>

pub fn contains_key(self, key: &Type::Key) -> Result<bool, T::Error>

impl<'a, T, Type> StorageMut<'a, T, Type>

where T: StorageMutate<Type>, Type: Mappable,

pub fn insert( self, key: &Type::Key, value: &Type::Value, ) -> Result<(), T::Error>

pub fn replace( self, key: &Type::Key, value: &Type::Value, ) -> Result<Option<Type::OwnedValue>, T::Error>

pub fn remove(self, key: &Type::Key) -> Result<(), T::Error>

pub fn take(self, key: &Type::Key) -> Result<Option<Type::OwnedValue>, T::Error>

impl<'a, T, Type: Mappable> StorageMut<'a, T, Type>

pub fn root<Key>(self, key: &Key) -> Result<MerkleRoot, T::Error>

where T: MerkleRootStorage<Key, Type>,

impl<'a, T, Type> StorageMut<'a, T, Type>

where Type: Mappable, T: StorageWrite<Type>,

pub fn write_bytes( &mut self, key: &Type::Key, buf: &[u8], ) -> Result<usize, T::Error>

pub fn replace_bytes( &mut self, key: &Type::Key, buf: &[u8], ) -> Result<(usize, Option<Vec<u8>>), T::Error>

where T: StorageSize<Type>,

pub fn take_bytes( &mut self, key: &Type::Key, ) -> Result<Option<Vec<u8>>, T::Error>