Trait pallet_housing_fund::storage::TryAppendDoubleMap

pub trait TryAppendDoubleMap<K1, K2, T, I>where
    K1: Encode,
    K2: Encode,
    T: StorageTryAppend<I>,
    I: Encode,{
    fn try_append<LikeK1, LikeK2, LikeI>(
        key1: LikeK1,
        key2: LikeK2,
        item: LikeI
    ) -> Result<(), ()>
    where
        LikeK1: EncodeLike<K1> + Clone,
        LikeK2: EncodeLike<K2> + Clone,
        LikeI: EncodeLike<I>;
}

Storage double map that is capable of StorageTryAppend.

Required Methods

fn try_append<LikeK1, LikeK2, LikeI>(
    key1: LikeK1,
    key2: LikeK2,
    item: LikeI
) -> Result<(), ()>where
    LikeK1: EncodeLike<K1> + Clone,
    LikeK2: EncodeLike<K2> + Clone,
    LikeI: EncodeLike<I>,

Try and append the item into the storage double map at the given key.

This might fail if bounds are not respected.

Implementors

impl<K1, K2, T, I, StorageDoubleMapT> TryAppendDoubleMap<K1, K2, T, I> for StorageDoubleMapTwhere
    K1: FullCodec,
    K2: FullCodec,
    T: FullCodec + StorageTryAppend<I>,
    I: Encode,
    StorageDoubleMapT: StorageDoubleMap<K1, K2, T>,