fix unused_must_use

pallets/distance/src/lib.rs

@@ -555,7 +555,7 @@ pub mod pallet {
                         }
                         Some(false) => {
                             // negative result, slash and deposit event
-                            T::Currency::slash_reserved(
+                            let _ = T::Currency::slash_reserved(
                                 &requester,
                                 <T as Config>::EvaluationPrice::get(),
                             );

pallets/oneshot-account/src/lib.rs

@@ -147,7 +147,7 @@ pub mod pallet {
                 Error::<T>::OneshotAccountAlreadyCreated
             );
 
-            <T::Currency as Currency<T::AccountId>>::withdraw(
+            let _ = <T::Currency as Currency<T::AccountId>>::withdraw(
                 &transactor,
                 value,
                 WithdrawReasons::TRANSFER,
@@ -206,6 +206,7 @@ pub mod pallet {
                     creator: transactor.clone(),
                 });
             } else {
+                let _ =
                     <T::Currency as Currency<T::AccountId>>::deposit_into_existing(&dest, value)?;
             }
             OneshotAccounts::<T>::remove(&transactor);
@@ -295,7 +296,9 @@ pub mod pallet {
                     creator: transactor.clone(),
                 });
             } else {
-                <T::Currency as Currency<T::AccountId>>::deposit_into_existing(&dest2, balance2)?;
+                let _ = <T::Currency as Currency<T::AccountId>>::deposit_into_existing(
+                    &dest2, balance2,
+                )?;
             }
             if dest1_is_oneshot {
                 OneshotAccounts::<T>::insert(&dest1, balance1);
@@ -305,7 +308,9 @@ pub mod pallet {
                     creator: transactor.clone(),
                 });
             } else {
-                <T::Currency as Currency<T::AccountId>>::deposit_into_existing(&dest1, balance1)?;
+                let _ = <T::Currency as Currency<T::AccountId>>::deposit_into_existing(
+                    &dest1, balance1,
+                )?;
             }
             OneshotAccounts::<T>::remove(&transactor);
             Self::deposit_event(Event::OneshotAccountConsumed {

pallets/universal-dividend/src/lib.rs

@@ -305,7 +305,7 @@ pub mod pallet {
                             core::num::NonZeroU16::new(current_ud_index)
                                 .expect("unrechable because current_ud_index is never zero."),
                         );
-                        T::Currency::deposit_creating(who, uds_total);
+                        let _ = T::Currency::deposit_creating(who, uds_total);
                         Self::deposit_event(Event::UdsClaimed {
                             count: uds_count,
                             total: uds_total,
@@ -443,7 +443,7 @@ pub mod pallet {
                     first_ud_index,
                     PastReevals::<T>::get().into_iter(),
                 );
-                T::Currency::deposit_creating(who, uds_total);
+                let _ = T::Currency::deposit_creating(who, uds_total);
                 Self::deposit_event(Event::UdsAutoPaid {
                     count: uds_count,
                     total: uds_total,