put the validate_unsigned implementation inside the pallet definition (#9044)

Co-authored-by: Shawn Tabrizi <shawntabrizi@gmail.com>

substrate/frame/babe/src/equivocation.rs

@@ -179,12 +179,12 @@ where
 	}
 }
 
-/// A `ValidateUnsigned` implementation that restricts calls to `report_equivocation_unsigned`
-/// to local calls (i.e. extrinsics generated on this node) or that already in a block. This
-/// guarantees that only block authors can include unsigned equivocation reports.
-impl<T: Config> frame_support::unsigned::ValidateUnsigned for Pallet<T> {
-	type Call = Call<T>;
-	fn validate_unsigned(source: TransactionSource, call: &Self::Call) -> TransactionValidity {
+/// Methods for the `ValidateUnsigned` implementation:
+/// It restricts calls to `report_equivocation_unsigned` to local calls (i.e. extrinsics generated
+/// on this node) or that already in a block. This guarantees that only block authors can include
+/// unsigned equivocation reports.
+impl<T: Config> Pallet<T> {
+	pub fn validate_unsigned(source: TransactionSource, call: &Call<T>) -> TransactionValidity {
 		if let Call::report_equivocation_unsigned(equivocation_proof, key_owner_proof) = call {
 			// discard equivocation report not coming from the local node
 			match source {
@@ -221,7 +221,7 @@ impl<T: Config> frame_support::unsigned::ValidateUnsigned for Pallet<T> {
 		}
 	}
 
-	fn pre_dispatch(call: &Self::Call) -> Result<(), TransactionValidityError> {
+	pub fn pre_dispatch(call: &Call<T>) -> Result<(), TransactionValidityError> {
 		if let Call::report_equivocation_unsigned(equivocation_proof, key_owner_proof) = call {
 			is_known_offence::<T>(equivocation_proof, key_owner_proof)
 		} else {

substrate/frame/babe/src/lib.rs

@@ -407,6 +407,18 @@ pub mod pallet {
 			Ok(())
 		}
 	}
+
+	#[pallet::validate_unsigned]
+	impl<T: Config> ValidateUnsigned for Pallet<T> {
+		type Call = Call<T>;
+		fn validate_unsigned(source: TransactionSource, call: &Self::Call) -> TransactionValidity {
+			Self::validate_unsigned(source, call)
+		}
+
+		fn pre_dispatch(call: &Self::Call) -> Result<(), TransactionValidityError> {
+			Self::pre_dispatch(call)
+		}
+	}
 }
 
 /// A BABE public key

substrate/frame/grandpa/src/equivocation.rs

@@ -200,12 +200,12 @@ pub struct GrandpaTimeSlot {
 	pub round: RoundNumber,
 }
 
-/// A `ValidateUnsigned` implementation that restricts calls to `report_equivocation_unsigned`
-/// to local calls (i.e. extrinsics generated on this node) or that already in a block. This
-/// guarantees that only block authors can include unsigned equivocation reports.
-impl<T: Config> frame_support::unsigned::ValidateUnsigned for Pallet<T> {
-	type Call = Call<T>;
-	fn validate_unsigned(source: TransactionSource, call: &Self::Call) -> TransactionValidity {
+/// Methods for the `ValidateUnsigned` implementation:
+/// It restricts calls to `report_equivocation_unsigned` to local calls (i.e. extrinsics generated
+/// on this node) or that already in a block. This guarantees that only block authors can include
+/// unsigned equivocation reports.
+impl<T: Config> Pallet<T> {
+	pub fn validate_unsigned(source: TransactionSource, call: &Call<T>) -> TransactionValidity {
 		if let Call::report_equivocation_unsigned(equivocation_proof, key_owner_proof) = call {
 			// discard equivocation report not coming from the local node
 			match source {
@@ -243,7 +243,7 @@ impl<T: Config> frame_support::unsigned::ValidateUnsigned for Pallet<T> {
 		}
 	}
 
-	fn pre_dispatch(call: &Self::Call) -> Result<(), TransactionValidityError> {
+	pub fn pre_dispatch(call: &Call<T>) -> Result<(), TransactionValidityError> {
 		if let Call::report_equivocation_unsigned(equivocation_proof, key_owner_proof) = call {
 			is_known_offence::<T>(equivocation_proof, key_owner_proof)
 		} else {

substrate/frame/grandpa/src/lib.rs

@@ -341,6 +341,18 @@ pub mod pallet {
 			Pallet::<T>::initialize(&self.authorities)
 		}
 	}
+
+	#[pallet::validate_unsigned]
+	impl<T: Config> ValidateUnsigned for Pallet<T> {
+		type Call = Call<T>;
+		fn validate_unsigned(source: TransactionSource, call: &Self::Call) -> TransactionValidity {
+			Self::validate_unsigned(source, call)
+		}
+
+		fn pre_dispatch(call: &Self::Call) -> Result<(), TransactionValidityError> {
+			Self::pre_dispatch(call)
+		}
+	}
 }
 
 pub trait WeightInfo {