Migrate some Pallets to Named Events (#5423)

* auctions

* claims

* registrar

* Update purchase.rs

* crowdloan

* slots

* comma

polkadot/runtime/common/src/slots/mod.rs

@@ -122,19 +122,18 @@ pub mod pallet {
 	#[pallet::generate_deposit(pub(super) fn deposit_event)]
 	pub enum Event<T: Config> {
 		/// A new `[lease_period]` is beginning.
-		NewLeasePeriod(LeasePeriodOf<T>),
+		NewLeasePeriod { lease_period: LeasePeriodOf<T> },
 		/// A para has won the right to a continuous set of lease periods as a parachain.
 		/// First balance is any extra amount reserved on top of the para's existing deposit.
 		/// Second balance is the total amount reserved.
-		/// `[parachain_id, leaser, period_begin, period_count, extra_reserved, total_amount]`
-		Leased(
-			ParaId,
-			T::AccountId,
-			LeasePeriodOf<T>,
-			LeasePeriodOf<T>,
-			BalanceOf<T>,
-			BalanceOf<T>,
-		),
+		Leased {
+			para_id: ParaId,
+			leaser: T::AccountId,
+			period_begin: LeasePeriodOf<T>,
+			period_count: LeasePeriodOf<T>,
+			extra_reserved: BalanceOf<T>,
+			total_amount: BalanceOf<T>,
+		},
 	}
 
 	#[pallet::error]
@@ -228,7 +227,7 @@ impl<T: Config> Pallet<T> {
 	/// We need to on-board and off-board parachains as needed. We should also handle reducing/
 	/// returning deposits.
 	fn manage_lease_period_start(lease_period_index: LeasePeriodOf<T>) -> Weight {
-		Self::deposit_event(Event::<T>::NewLeasePeriod(lease_period_index));
+		Self::deposit_event(Event::<T>::NewLeasePeriod { lease_period: lease_period_index });
 
 		let old_parachains = T::Registrar::parachains();
 
@@ -408,14 +407,14 @@ impl<T: Config> Leaser<T::BlockNumber> for Pallet<T> {
 				let _ = T::Registrar::make_parachain(para);
 			}
 
-			Self::deposit_event(Event::<T>::Leased(
-				para,
-				leaser.clone(),
+			Self::deposit_event(Event::<T>::Leased {
+				para_id: para,
+				leaser: leaser.clone(),
 				period_begin,
 				period_count,
-				reserved,
-				amount,
-			));
+				extra_reserved: reserved,
+				total_amount: amount,
+			});
 
 			Ok(())
 		})
@@ -1027,7 +1026,13 @@ mod benchmarking {
 			let period_count = 3u32.into();
 		}: _(RawOrigin::Root, para, leaser.clone(), amount, period_begin, period_count)
 		verify {
-			assert_last_event::<T>(Event::<T>::Leased(para, leaser, period_begin, period_count, amount, amount).into());
+			assert_last_event::<T>(Event::<T>::Leased {
+				para_id: para,
+				leaser, period_begin,
+				period_count,
+				extra_reserved: amount,
+				total_amount: amount,
+			}.into());
 		}
 
 		// Worst case scenario, T parathreads onboard, and C parachains offboard.