Add storage migrations

bin/node/runtime/src/lib.rs

@@ -1284,9 +1284,31 @@ pub type Executive = frame_executive::Executive<
 	frame_system::ChainContext<Runtime>,
 	Runtime,
 	AllPallets,
-	pallet_bags_list::migrations::CheckCounterPrefix<Runtime>,
+	(
+		pallet_bags_list::migrations::CheckCounterPrefix<Runtime>,
+		StakingBagsListMigrationV8,
+	)
 >;
 
+// Migration to generate pallet staking's `SortedListProvider` from pre-existing nominators.
+pub struct StakingBagsListMigrationV8;
+
+impl OnRuntimeUpgrade for StakingBagsListMigrationV8 {
+	fn on_runtime_upgrade() -> frame_support::weights::Weight {
+		pallet_staking::migrations::v8::migrate::<Runtime>()
+	}
+
+	#[cfg(feature = "try-runtime")]
+	fn pre_upgrade() -> Result<(), &'static str> {
+		pallet_staking::migrations::v8::pre_migrate::<Runtime>()
+	}
+
+	#[cfg(feature = "try-runtime")]
+	fn post_upgrade() -> Result<(), &'static str> {
+		pallet_staking::migrations::v8::post_migrate::<Runtime>()
+	}
+}
+
 impl_runtime_apis! {
 	impl sp_api::Core<Block> for Runtime {
 		fn version() -> RuntimeVersion {