Enable Nomination Pool Participation in Governance in Kusama (#540)

Relates to #455.

The Polkadot changes were implemented in [this
PR](#490) but were
[reverted](pandres95#8) for Kusama.
Some [patches](paritytech/polkadot-sdk#6592) to
2409 were required before these changes can be applied to Kusama.

CHANGELOG.md

@@ -21,6 +21,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 - ParaRegistration proxy for Polkadot and Kusama ([polkadot-fellows/runtimes#520](https://github.com/polkadot-fellows/runtimes/pull/520))
 
+- Delegate stake pools in Kusama ([polkadot-fellows/runtimes#540](https://github.com/polkadot-fellows/runtimes/pull/540))
+
 ### Changed
 
 - Kusama Treasury: remove funding to the Kappa Sigma Mu Society and disable burn ([polkadot-fellows/runtimes#507](https://github.com/polkadot-fellows/runtimes/pull/507))

Cargo.toml

@@ -136,9 +136,9 @@ pallet-nft-fractionalization = { version = "21.0.0", default-features = false }
 pallet-nfts = { version = "32.0.0", default-features = false }
 pallet-nfts-runtime-api = { version = "24.0.0", default-features = false }
 pallet-nis = { version = "38.0.0", default-features = false }
-pallet-nomination-pools = { version = "35.0.0", default-features = false }
+pallet-nomination-pools = { version = "35.0.2", default-features = false }
 pallet-nomination-pools-benchmarking = { version = "36.0.0", default-features = false }
-pallet-nomination-pools-runtime-api = { version = "33.0.0", default-features = false }
+pallet-nomination-pools-runtime-api = { version = "33.0.2", default-features = false }
 pallet-offences = { version = "37.0.0", default-features = false }
 pallet-offences-benchmarking = { version = "38.0.0", default-features = false }
 pallet-parameters = { version = "0.9.0", default-features = false }

relay/kusama/src/lib.rs

@@ -807,7 +807,7 @@ impl pallet_staking::Config for Runtime {
 	type HistoryDepth = frame_support::traits::ConstU32<84>;
 	type MaxControllersInDeprecationBatch = ConstU32<5169>;
 	type BenchmarkingConfig = polkadot_runtime_common::StakingBenchmarkingConfig;
-	type EventListeners = NominationPools;
+	type EventListeners = (NominationPools, DelegatedStaking);
 	type DisablingStrategy = pallet_staking::UpToLimitDisablingStrategy;
 	type WeightInfo = weights::pallet_staking::WeightInfo<Runtime>;
 }
@@ -1626,7 +1626,8 @@ impl pallet_nomination_pools::Config for Runtime {
 	type RewardCounter = FixedU128;
 	type BalanceToU256 = BalanceToU256;
 	type U256ToBalance = U256ToBalance;
-	type StakeAdapter = pallet_nomination_pools::adapter::TransferStake<Self, Staking>;
+	type StakeAdapter =
+		pallet_nomination_pools::adapter::DelegateStake<Self, Staking, DelegatedStaking>;
 	type PostUnbondingPoolsWindow = ConstU32<4>;
 	type MaxMetadataLen = ConstU32<256>;
 	// we use the same number of allowed unlocking chunks as with staking.
@@ -1841,6 +1842,13 @@ impl Get<Perbill> for NominationPoolsMigrationV4OldPallet {
 	}
 }
 
+parameter_types! {
+	// This is used to limit max pools that migrates in the runtime upgrade. This is set to
+	// ~existing_pool_count * 2 to also account for any new pools getting created before the
+	// migration is actually executed.
+	pub const MaxPoolsToMigrate: u32 = 500;
+}
+
 /// All migrations that will run on the next runtime upgrade.
 ///
 /// This contains the combined migrations of the last 10 releases. It allows to skip runtime
@@ -1859,6 +1867,11 @@ pub mod migrations {
 		parachains_inclusion::migration::MigrateToV1<Runtime>,
 		parachains_on_demand::migration::MigrateV0ToV1<Runtime>,
 		restore_corrupted_ledgers::Migrate<Runtime>,
+		// Migrate NominationPools to `DelegateStake` adapter. This is an unversioned upgrade.
+		pallet_nomination_pools::migration::unversioned::DelegationStakeMigration<
+			Runtime,
+			MaxPoolsToMigrate,
+		>,
 	);
 
 	/// Migrations/checks that do not need to be versioned and can run on every update.