[Trivial] Use 'into_inner' for WeakBoundedVec (#1664)

Prevents authority set clone

substrate/frame/babe/src/lib.rs

@@ -590,7 +590,6 @@ impl<T: Config> Pallet<T> {
 
 		if authorities.is_empty() {
 			log::warn!(target: LOG_TARGET, "Ignoring empty epoch change.");
-
 			return
 		}
 
@@ -664,7 +663,7 @@ impl<T: Config> Pallet<T> {
 		let next_randomness = NextRandomness::<T>::get();
 
 		let next_epoch = NextEpochDescriptor {
-			authorities: next_authorities.to_vec(),
+			authorities: next_authorities.into_inner(),
 			randomness: next_randomness,
 		};
 		Self::deposit_consensus(ConsensusLog::NextEpochData(next_epoch));
@@ -700,7 +699,7 @@ impl<T: Config> Pallet<T> {
 			epoch_index: EpochIndex::<T>::get(),
 			start_slot: Self::current_epoch_start(),
 			duration: T::EpochDuration::get(),
-			authorities: Self::authorities().to_vec(),
+			authorities: Self::authorities().into_inner(),
 			randomness: Self::randomness(),
 			config: EpochConfig::<T>::get()
 				.expect("EpochConfig is initialized in genesis; we never `take` or `kill` it; qed"),
@@ -725,7 +724,7 @@ impl<T: Config> Pallet<T> {
 			epoch_index: next_epoch_index,
 			start_slot,
 			duration: T::EpochDuration::get(),
-			authorities: NextAuthorities::<T>::get().to_vec(),
+			authorities: NextAuthorities::<T>::get().into_inner(),
 			randomness: NextRandomness::<T>::get(),
 			config: NextEpochConfig::<T>::get().unwrap_or_else(|| {
 				EpochConfig::<T>::get().expect(
@@ -778,7 +777,7 @@ impl<T: Config> Pallet<T> {
 		// we use the same values as genesis because we haven't collected any
 		// randomness yet.
 		let next = NextEpochDescriptor {
-			authorities: Self::authorities().to_vec(),
+			authorities: Self::authorities().into_inner(),
 			randomness: Self::randomness(),
 		};
 

substrate/frame/babe/src/tests.rs

@@ -95,7 +95,7 @@ fn first_block_epoch_zero_start() {
 
 		let consensus_log = sp_consensus_babe::ConsensusLog::NextEpochData(
 			sp_consensus_babe::digests::NextEpochDescriptor {
-				authorities: Babe::authorities().to_vec(),
+				authorities: Babe::authorities().into_inner(),
 				randomness: Babe::randomness(),
 			},
 		);

substrate/frame/grandpa/src/lib.rs

@@ -129,18 +129,16 @@ pub mod pallet {
 			if let Some(pending_change) = <PendingChange<T>>::get() {
 				// emit signal if we're at the block that scheduled the change
 				if block_number == pending_change.scheduled_at {
+					let next_authorities = pending_change.next_authorities.to_vec();
 					if let Some(median) = pending_change.forced {
 						Self::deposit_log(ConsensusLog::ForcedChange(
 							median,
-							ScheduledChange {
-								delay: pending_change.delay,
-								next_authorities: pending_change.next_authorities.to_vec(),
-							},
+							ScheduledChange { delay: pending_change.delay, next_authorities },
 						))
 					} else {
 						Self::deposit_log(ConsensusLog::ScheduledChange(ScheduledChange {
 							delay: pending_change.delay,
-							next_authorities: pending_change.next_authorities.to_vec(),
+							next_authorities,
 						}));
 					}
 				}
@@ -149,7 +147,7 @@ pub mod pallet {
 				if block_number == pending_change.scheduled_at + pending_change.delay {
 					Self::set_grandpa_authorities(&pending_change.next_authorities);
 					Self::deposit_event(Event::NewAuthorities {
-						authority_set: pending_change.next_authorities.to_vec(),
+						authority_set: pending_change.next_authorities.into_inner(),
 					});
 					<PendingChange<T>>::kill();
 				}