Pallet AURA: remove pallet::getter macro and write the corresponding code (#3350)

Removed the `pallet::getter` macro call from storage type definitions
and added the corresponding implementations directly.
fixes #3330  

polkadot address: 14JzTPPUd8x8phKi8qLxHgNTnTMg6DUukCLXoWprejkaHXPz

---------

Co-authored-by: Bastian Köcher <git@kchr.de>

cumulus/pallets/aura-ext/src/lib.rs

@@ -63,14 +63,14 @@ pub mod pallet {
 	impl<T: Config> Hooks<BlockNumberFor<T>> for Pallet<T> {
 		fn on_finalize(_: BlockNumberFor<T>) {
 			// Update to the latest AuRa authorities.
-			Authorities::<T>::put(Aura::<T>::authorities());
+			Authorities::<T>::put(pallet_aura::Authorities::<T>::get());
 		}
 
 		fn on_initialize(_: BlockNumberFor<T>) -> Weight {
 			// Fetch the authorities once to get them into the storage proof of the PoV.
 			Authorities::<T>::get();
 
-			let new_slot = Aura::<T>::current_slot();
+			let new_slot = pallet_aura::CurrentSlot::<T>::get();
 
 			let (new_slot, authored) = match SlotInfo::<T>::get() {
 				Some((slot, authored)) if slot == new_slot => (slot, authored + 1),
@@ -116,7 +116,7 @@ pub mod pallet {
 	#[pallet::genesis_build]
 	impl<T: Config> BuildGenesisConfig for GenesisConfig<T> {
 		fn build(&self) {
-			let authorities = Aura::<T>::authorities();
+			let authorities = pallet_aura::Authorities::<T>::get();
 			Authorities::<T>::put(authorities);
 		}
 	}

cumulus/parachains/runtimes/assets/asset-hub-rococo/src/lib.rs

@@ -1067,7 +1067,7 @@ impl_runtime_apis! {
 		}
 
 		fn authorities() -> Vec<AuraId> {
-			Aura::authorities().into_inner()
+			pallet_aura::Authorities::<Runtime>::get().into_inner()
 		}
 	}
 

cumulus/parachains/runtimes/assets/asset-hub-westend/src/lib.rs

@@ -1098,7 +1098,7 @@ impl_runtime_apis! {
 		}
 
 		fn authorities() -> Vec<AuraId> {
-			Aura::authorities().into_inner()
+			pallet_aura::Authorities::<Runtime>::get().into_inner()
 		}
 	}
 

cumulus/parachains/runtimes/bridge-hubs/bridge-hub-rococo/src/lib.rs

@@ -790,7 +790,7 @@ impl_runtime_apis! {
 		}
 
 		fn authorities() -> Vec<AuraId> {
-			Aura::authorities().into_inner()
+			pallet_aura::Authorities::<Runtime>::get().into_inner()
 		}
 	}
 

cumulus/parachains/runtimes/bridge-hubs/bridge-hub-westend/src/lib.rs

@@ -540,7 +540,7 @@ impl_runtime_apis! {
 		}
 
 		fn authorities() -> Vec<AuraId> {
-			Aura::authorities().into_inner()
+			pallet_aura::Authorities::<Runtime>::get().into_inner()
 		}
 	}
 

cumulus/parachains/runtimes/collectives/collectives-westend/src/lib.rs

@@ -777,7 +777,7 @@ impl_runtime_apis! {
 		}
 
 		fn authorities() -> Vec<AuraId> {
-			Aura::authorities().into_inner()
+			pallet_aura::Authorities::<Runtime>::get().into_inner()
 		}
 	}
 

cumulus/parachains/runtimes/contracts/contracts-rococo/src/lib.rs

@@ -440,7 +440,7 @@ impl_runtime_apis! {
 		}
 
 		fn authorities() -> Vec<AuraId> {
-			Aura::authorities().into_inner()
+			pallet_aura::Authorities::<Runtime>::get().into_inner()
 		}
 	}
 

cumulus/parachains/runtimes/coretime/coretime-rococo/src/lib.rs

@@ -495,7 +495,7 @@ impl_runtime_apis! {
 		}
 
 		fn authorities() -> Vec<AuraId> {
-			Aura::authorities().into_inner()
+			pallet_aura::Authorities::<Runtime>::get().into_inner()
 		}
 	}
 

cumulus/parachains/runtimes/coretime/coretime-westend/src/lib.rs

@@ -486,7 +486,7 @@ impl_runtime_apis! {
 		}
 
 		fn authorities() -> Vec<AuraId> {
-			Aura::authorities().into_inner()
+			pallet_aura::Authorities::<Runtime>::get().into_inner()
 		}
 	}
 

cumulus/parachains/runtimes/glutton/glutton-westend/src/lib.rs

@@ -353,7 +353,7 @@ impl_runtime_apis! {
 		}
 
 		fn authorities() -> Vec<AuraId> {
-			Aura::authorities().into_inner()
+			pallet_aura::Authorities::<Runtime>::get().into_inner()
 		}
 	}
 

cumulus/parachains/runtimes/people/people-rococo/src/lib.rs

@@ -469,7 +469,7 @@ impl_runtime_apis! {
 		}
 
 		fn authorities() -> Vec<AuraId> {
-			Aura::authorities().into_inner()
+			pallet_aura::Authorities::<Runtime>::get().into_inner()
 		}
 	}
 

cumulus/parachains/runtimes/people/people-westend/src/lib.rs

@@ -469,7 +469,7 @@ impl_runtime_apis! {
 		}
 
 		fn authorities() -> Vec<AuraId> {
-			Aura::authorities().into_inner()
+			pallet_aura::Authorities::<Runtime>::get().into_inner()
 		}
 	}
 

cumulus/parachains/runtimes/starters/seedling/src/lib.rs

@@ -283,7 +283,7 @@ impl_runtime_apis! {
 		}
 
 		fn authorities() -> Vec<AuraId> {
-			Aura::authorities().into_inner()
+			pallet_aura::Authorities::<Runtime>::get().into_inner()
 		}
 	}
 

cumulus/parachains/runtimes/starters/shell/src/lib.rs

@@ -340,7 +340,7 @@ impl_runtime_apis! {
 		}
 
 		fn authorities() -> Vec<AuraId> {
-			Aura::authorities().into_inner()
+			pallet_aura::Authorities::<Runtime>::get().into_inner()
 		}
 	}
 

cumulus/parachains/runtimes/testing/penpal/src/lib.rs

@@ -688,7 +688,7 @@ impl_runtime_apis! {
 		}
 
 		fn authorities() -> Vec<AuraId> {
-			Aura::authorities().into_inner()
+			pallet_aura::Authorities::<Runtime>::get().into_inner()
 		}
 	}
 

cumulus/parachains/runtimes/testing/rococo-parachain/src/lib.rs

@@ -758,7 +758,7 @@ impl_runtime_apis! {
 		}
 
 		fn authorities() -> Vec<AuraId> {
-			Aura::authorities().into_inner()
+			pallet_aura::Authorities::<Runtime>::get().into_inner()
 		}
 	}
 

prdoc/pr_3350.prdoc

@@ -0,0 +1,31 @@
+# Schema: Polkadot SDK PRDoc Schema (prdoc) v1.0.0
+# See doc at https://raw.githubusercontent.com/paritytech/polkadot-sdk/master/prdoc/schema_user.json
+
+title: removed `pallet::getter` from Pallet AURA
+
+doc:
+  - audience: Runtime Dev
+    description: |
+      This PR removes all the declarations of macro `pallet::getter` in the Pallet AURA and replaces the use of storage getter functions authorities() & current_slot() with `StorageItem::get()` API across the crates as listed bellow.  
+      The purpose is to discourage developers to use this macro, that is currently being removed and soon will be deprecated.
+
+crates: 
+  - name: pallet-aura
+  - name: solochain-template-runtime
+  - name: cumulus-pallet-aura-ext
+  - name: parachain-template-runtime
+  - name: people-westend-runtime
+  - name: people-rococo-runtime
+  - name: bridge-hub-rococo-runtime
+  - name: bridge-hub-westend-runtime
+  - name: rococo-parachain-runtime
+  - name: penpal-runtime
+  - name: glutton-westend-runtime
+  - name: shell-runtime
+  - name: seedling-runtime
+  - name: collectives-westend-runtime
+  - name: asset-hub-rococo-runtime
+  - name: asset-hub-westend-runtime
+  - name: contracts-rococo-runtime
+  - name: coretime-westend-runtime
+  - name: coretime-rococo-runtime

substrate/frame/aura/src/lib.rs

@@ -161,16 +161,14 @@ pub mod pallet {
 
 	/// The current authority set.
 	#[pallet::storage]
-	#[pallet::getter(fn authorities)]
+	pub type Authorities<T: Config> =
-	pub(super) type Authorities<T: Config> =
 		StorageValue<_, BoundedVec<T::AuthorityId, T::MaxAuthorities>, ValueQuery>;
 
 	/// The current slot of this block.
 	///
 	/// This will be set in `on_initialize`.
 	#[pallet::storage]
-	#[pallet::getter(fn current_slot)]
+	pub type CurrentSlot<T: Config> = StorageValue<_, Slot, ValueQuery>;
-	pub(super) type CurrentSlot<T: Config> = StorageValue<_, Slot, ValueQuery>;
 
 	#[pallet::genesis_config]
 	#[derive(frame_support::DefaultNoBound)]
@@ -318,7 +316,7 @@ impl<T: Config> OneSessionHandler<T::AccountId> for Pallet<T> {
 		// instant changes
 		if changed {
 			let next_authorities = validators.map(|(_, k)| k).collect::<Vec<_>>();
-			let last_authorities = Self::authorities();
+			let last_authorities = Authorities::<T>::get();
 			if last_authorities != next_authorities {
 				if next_authorities.len() as u32 > T::MaxAuthorities::get() {
 					log::warn!(
@@ -374,7 +372,7 @@ impl<T: Config, Inner: FindAuthor<u32>> FindAuthor<T::AuthorityId>
 	{
 		let i = Inner::find_author(digests)?;
 
-		let validators = <Pallet<T>>::authorities();
+		let validators = Authorities::<T>::get();
 		validators.get(i as usize).cloned()
 	}
 }
@@ -384,7 +382,7 @@ pub type AuraAuthorId<T> = FindAccountFromAuthorIndex<T, Pallet<T>>;
 
 impl<T: Config> IsMember<T::AuthorityId> for Pallet<T> {
 	fn is_member(authority_id: &T::AuthorityId) -> bool {
-		Self::authorities().iter().any(|id| id == authority_id)
+		Authorities::<T>::get().iter().any(|id| id == authority_id)
 	}
 }
 

substrate/frame/aura/src/tests.rs

@@ -19,7 +19,8 @@
 
 #![cfg(test)]
 
-use crate::mock::{build_ext_and_execute_test, Aura, MockDisabledValidators, System};
+use super::pallet;
+use crate::mock::{build_ext_and_execute_test, Aura, MockDisabledValidators, System, Test};
 use codec::Encode;
 use frame_support::traits::OnInitialize;
 use sp_consensus_aura::{Slot, AURA_ENGINE_ID};
@@ -28,8 +29,8 @@ use sp_runtime::{Digest, DigestItem};
 #[test]
 fn initial_values() {
 	build_ext_and_execute_test(vec![0, 1, 2, 3], || {
-		assert_eq!(Aura::current_slot(), 0u64);
+		assert_eq!(pallet::CurrentSlot::<Test>::get(), 0u64);
-		assert_eq!(Aura::authorities().len(), Aura::authorities_len());
+		assert_eq!(pallet::Authorities::<Test>::get().len(), Aura::authorities_len());
 		assert_eq!(Aura::authorities_len(), 4);
 	});
 }

templates/parachain/runtime/src/lib.rs

@@ -57,6 +57,8 @@ use polkadot_runtime_common::{BlockHashCount, SlowAdjustingFeeUpdate};
 
 use weights::{BlockExecutionWeight, ExtrinsicBaseWeight, RocksDbWeight};
 
+use pallet_aura::Authorities;
+
 // XCM Imports
 use xcm::latest::prelude::BodyId;
 
@@ -547,7 +549,7 @@ impl_runtime_apis! {
 		}
 
 		fn authorities() -> Vec<AuraId> {
-			Aura::authorities().into_inner()
+			Authorities::<Runtime>::get().into_inner()
 		}
 	}
 

templates/solochain/runtime/src/lib.rs

@@ -415,7 +415,7 @@ impl_runtime_apis! {
 		}
 
 		fn authorities() -> Vec<AuraId> {
-			Aura::authorities().into_inner()
+			pallet_aura::Authorities::<Runtime>::get().into_inner()
 		}
 	}