Trait frame_support::storage::TryAppendMap
source · [−]pub trait TryAppendMap<K: Encode, T: StorageTryAppend<I>, I: Encode> {
fn try_append<LikeK: EncodeLike<K> + Clone, LikeI: EncodeLike<I>>(
key: LikeK,
item: LikeI
) -> Result<(), ()>;
}Expand description
Storage map that is capable of StorageTryAppend.
Required methods
fn try_append<LikeK: EncodeLike<K> + Clone, LikeI: EncodeLike<I>>(
key: LikeK,
item: LikeI
) -> Result<(), ()>
fn try_append<LikeK: EncodeLike<K> + Clone, LikeI: EncodeLike<I>>(
key: LikeK,
item: LikeI
) -> Result<(), ()>
Try and append the item into the storage map at the given key.
This might fail if bounds are not respected.