Rename BagsList to VoterList and Add Score (#5463)

* add migration for simple pallet rename

* fmt

* also add score migration

* add try-runtime feature to bags list

* add pre_upgrade to pallet rename

* update lockfile for {"substrate"}

Co-authored-by: parity-processbot <>

polkadot/runtime/westend/Cargo.toml

@@ -227,6 +227,7 @@ try-runtime = [
 	"pallet-authorship/try-runtime",
 	"pallet-authority-discovery/try-runtime",
 	"pallet-balances/try-runtime",
+	"pallet-bags-list/try-runtime",
 	"pallet-transaction-payment/try-runtime",
 	"pallet-collective/try-runtime",
 	"pallet-elections-phragmen/try-runtime",

polkadot/runtime/westend/src/lib.rs

@@ -498,7 +498,7 @@ impl pallet_staking::Config for Runtime {
 	type NextNewSession = Session;
 	type ElectionProvider = ElectionProviderMultiPhase;
 	type GenesisElectionProvider = onchain::UnboundedExecution<OnChainSeqPhragmen>;
-	type VoterList = BagsList;
+	type VoterList = VoterList;
 	type MaxUnlockingChunks = frame_support::traits::ConstU32<32>;
 	type BenchmarkingConfig = runtime_common::StakingBenchmarkingConfig;
 	type OnStakerSlash = ();
@@ -792,7 +792,7 @@ impl InstanceFilter<Call> for ProxyType {
 				Call::Crowdloan(..) |
 				Call::Slots(..) |
 				Call::Auctions(..) | // Specifically omitting the entire XCM Pallet
-				Call::BagsList(..) |
+				Call::VoterList(..) |
 				Call::NominationPools(..)
 			),
 			ProxyType::Staking => {
@@ -1098,7 +1098,7 @@ construct_runtime! {
 		ElectionProviderMultiPhase: pallet_election_provider_multi_phase::{Pallet, Call, Storage, Event<T>, ValidateUnsigned} = 24,
 
 		// Provides a semi-sorted list of nominators for staking.
-		BagsList: pallet_bags_list::{Pallet, Call, Storage, Event<T>} = 25,
+		VoterList: pallet_bags_list::{Pallet, Call, Storage, Event<T>} = 25,
 
 		// Nomination pools for staking.
 		NominationPools: pallet_nomination_pools::{Pallet, Call, Storage, Event<T>, Config<T>} = 29,
@@ -1161,11 +1161,26 @@ pub type Executive = frame_executive::Executive<
 	frame_system::ChainContext<Runtime>,
 	Runtime,
 	AllPalletsWithSystem,
-	(),
+	(RenameBagsListToVoterList, pallet_bags_list::migrations::AddScore<Runtime>),
 >;
 /// The payload being signed in transactions.
 pub type SignedPayload = generic::SignedPayload<Call, SignedExtra>;
 
+/// A migration which renames the pallet `BagsList` to `VoterList`
+pub struct RenameBagsListToVoterList;
+impl frame_support::traits::OnRuntimeUpgrade for RenameBagsListToVoterList {
+	#[cfg(feature = "try-runtime")]
+	fn pre_upgrade() -> Result<(), &'static str> {
+		// For other pre-upgrade checks, we need the storage to already be migrated.
+		frame_support::storage::migration::move_pallet(b"BagsList", b"VoterList");
+		Ok(())
+	}
+	fn on_runtime_upgrade() -> frame_support::weights::Weight {
+		frame_support::storage::migration::move_pallet(b"BagsList", b"VoterList");
+		frame_support::weights::Weight::MAX
+	}
+}
+
 #[cfg(feature = "runtime-benchmarks")]
 #[macro_use]
 extern crate frame_benchmarking;
@@ -1188,7 +1203,7 @@ mod benches {
 		[runtime_parachains::paras_inherent, ParaInherent]
 		[runtime_parachains::ump, Ump]
 		// Substrate
-		[pallet_bags_list, BagsList]
+		[pallet_bags_list, VoterList]
 		[pallet_balances, Balances]
 		[pallet_election_provider_multi_phase, ElectionProviderMultiPhase]
 		[frame_election_provider_support, ElectionProviderBench::<Runtime>]