Add nomination pools to Polkadot runtime

node/service/src/chain_spec.rs

@@ -386,6 +386,7 @@ fn polkadot_staging_testnet_config_genesis(wasm_binary: &[u8]) -> polkadot::Gene
 		},
 		paras: Default::default(),
 		xcm_pallet: Default::default(),
+		nomination_pools: Default::default(),
 	}
 }
 
@@ -1369,6 +1370,7 @@ pub fn polkadot_testnet_genesis(
 		},
 		paras: Default::default(),
 		xcm_pallet: Default::default(),
+		nomination_pools: Default::default(),
 	}
 }
 

runtime/common/src/lib.rs

@@ -43,7 +43,7 @@ use frame_support::{
 	weights::{constants::WEIGHT_PER_SECOND, Weight},
 };
 use frame_system::limits;
-use primitives::v2::{AssignmentId, BlockNumber, ValidatorId};
+use primitives::v2::{AssignmentId, Balance, BlockNumber, ValidatorId};
 use sp_runtime::{FixedPointNumber, Perbill, Perquintill};
 use static_assertions::const_assert;
 
@@ -215,6 +215,23 @@ impl pallet_staking::BenchmarkingConfig for StakingBenchmarkingConfig {
 	type MaxNominators = ConstU32<1000>;
 }
 
+/// Convert a balance to an unsigned 256-bit number, use in nomination pools.
+pub struct BalanceToU256;
+impl sp_runtime::traits::Convert<Balance, sp_core::U256> for BalanceToU256 {
+	fn convert(n: Balance) -> sp_core::U256 {
+		n.into()
+	}
+}
+
+/// Convert an unsigned 256-bit number to balance, use in nomination pools.
+pub struct U256ToBalance;
+impl sp_runtime::traits::Convert<sp_core::U256, Balance> for U256ToBalance {
+	fn convert(n: sp_core::U256) -> Balance {
+		use frame_support::traits::Defensive;
+		n.try_into().defensive_unwrap_or(Balance::MAX)
+	}
+}
+
 /// Macro to set a value (e.g. when using the `parameter_types` macro) to either a production value
 /// or to an environment variable or testing value (in case the `fast-runtime` feature is selected).
 /// Note that the environment variable is evaluated _at compile time_.

runtime/kusama/src/lib.rs

@@ -31,7 +31,8 @@ use primitives::v2::{
 };
 use runtime_common::{
 	auctions, claims, crowdloan, impl_runtime_weights, impls::DealWithFees, paras_registrar,
-	prod_or_fast, slots, BlockHashCount, BlockLength, CurrencyToVote, SlowAdjustingFeeUpdate,
+	prod_or_fast, slots, BalanceToU256, BlockHashCount, BlockLength, CurrencyToVote,
+	SlowAdjustingFeeUpdate, U256ToBalance,
 };
 use sp_std::{cmp::Ordering, collections::btree_map::BTreeMap, prelude::*};
 
@@ -1196,7 +1197,8 @@ impl InstanceFilter<Call> for ProxyType {
 				Call::Crowdloan(..) |
 				Call::Slots(..) |
 				Call::Auctions(..) | // Specifically omitting the entire XCM Pallet
-				Call::VoterList(..)
+				Call::VoterList(..) |
+				Call::NominationPools(..)
 			),
 			ProxyType::Governance => matches!(
 				c,
@@ -1423,20 +1425,6 @@ impl pallet_gilt::Config for Runtime {
 	type WeightInfo = weights::pallet_gilt::WeightInfo<Runtime>;
 }
 
-pub struct BalanceToU256;
-impl sp_runtime::traits::Convert<Balance, sp_core::U256> for BalanceToU256 {
-	fn convert(n: Balance) -> sp_core::U256 {
-		n.into()
-	}
-}
-pub struct U256ToBalance;
-impl sp_runtime::traits::Convert<sp_core::U256, Balance> for U256ToBalance {
-	fn convert(n: sp_core::U256) -> Balance {
-		use frame_support::traits::Defensive;
-		n.try_into().defensive_unwrap_or(Balance::MAX)
-	}
-}
-
 parameter_types! {
 	pub const PoolsPalletId: PalletId = PalletId(*b"py/nopls");
 	pub const MaxPointsToBalance: u8 = 10;

runtime/polkadot/Cargo.toml

@@ -54,6 +54,7 @@ pallet-im-online = { git = "https://github.com/paritytech/substrate", branch = "
 pallet-indices = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
 pallet-membership = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
 pallet-multisig = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
+pallet-nomination-pools = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
 pallet-offences = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
 pallet-preimage = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
 pallet-proxy = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
@@ -79,6 +80,7 @@ frame-system-benchmarking = { git = "https://github.com/paritytech/substrate", b
 pallet-election-provider-support-benchmarking = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false, optional = true }
 pallet-offences-benchmarking = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false, optional = true }
 pallet-session-benchmarking = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false, optional = true }
+pallet-nomination-pools-benchmarking = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false, optional = true }
 hex-literal = { version = "0.3.4", optional = true }
 
 runtime-common = { package = "polkadot-runtime-common", path = "../common", default-features = false }
@@ -140,6 +142,7 @@ std = [
 	"pallet-indices/std",
 	"pallet-membership/std",
 	"pallet-multisig/std",
+	"pallet-nomination-pools/std",
 	"pallet-offences/std",
 	"pallet-preimage/std",
 	"pallet-proxy/std",
@@ -193,6 +196,8 @@ runtime-benchmarks = [
 	"pallet-indices/runtime-benchmarks",
 	"pallet-membership/runtime-benchmarks",
 	"pallet-multisig/runtime-benchmarks",
+	"pallet-nomination-pools/runtime-benchmarks",
+	"pallet-nomination-pools-benchmarking",
 	"pallet-preimage/runtime-benchmarks",
 	"pallet-proxy/runtime-benchmarks",
 	"pallet-scheduler/runtime-benchmarks",

runtime/polkadot/src/lib.rs

@@ -71,7 +71,7 @@ use sp_runtime::{
 		OpaqueKeys, SaturatedConversion, Verify,
 	},
 	transaction_validity::{TransactionPriority, TransactionSource, TransactionValidity},
-	ApplyExtrinsicResult, KeyTypeId, Perbill, Percent, Permill,
+	ApplyExtrinsicResult, FixedU128, KeyTypeId, Perbill, Percent, Permill,
 };
 use sp_staking::SessionIndex;
 use sp_std::{cmp::Ordering, collections::btree_map::BTreeMap, prelude::*};
@@ -183,7 +183,8 @@ impl Contains<Call> for BaseFilter {
 			Call::Auctions(_) |
 			Call::Crowdloan(_) |
 			Call::VoterList(_) |
-			Call::XcmPallet(_) => true,
+			Call::XcmPallet(_) |
+			Call::NominationPools(_) => true,
 			// All pallets are allowed, but exhaustive match is defensive
 			// in the case of adding new pallets.
 		}
@@ -613,7 +614,7 @@ impl pallet_staking::Config for Runtime {
 	type VoterList = VoterList;
 	type MaxUnlockingChunks = frame_support::traits::ConstU32<32>;
 	type BenchmarkingConfig = runtime_common::StakingBenchmarkingConfig;
-	type OnStakerSlash = ();
+	type OnStakerSlash = NominationPools;
 	type WeightInfo = weights::pallet_staking::WeightInfo<Runtime>;
 }
 
@@ -1180,7 +1181,8 @@ impl InstanceFilter<Call> for ProxyType {
 				Call::Crowdloan(..) |
 				Call::Slots(..) |
 				Call::Auctions(..) | // Specifically omitting the entire XCM Pallet
-				Call::VoterList(..)
+				Call::VoterList(..) |
+				Call::NominationPools(..)
 			),
 			ProxyType::Governance => matches!(
 				c,
@@ -1389,6 +1391,53 @@ impl auctions::Config for Runtime {
 	type WeightInfo = weights::runtime_common_auctions::WeightInfo<Runtime>;
 }
 
+parameter_types! {
+	pub const PoolsPalletId: PalletId = PalletId(*b"py/nopls");
+	// Allow pools that got slashed up to 90% to remain operational.
+	pub const MaxPointsToBalance: u8 = 10;
+}
+
+impl pallet_nomination_pools::Config for Runtime {
+	type Event = Event;
+	type Currency = Balances;
+	type CurrencyBalance = Balance;
+	type RewardCounter = FixedU128;
+	type BalanceToU256 = runtime_common::BalanceToU256;
+	type U256ToBalance = runtime_common::U256ToBalance;
+	type StakingInterface = Staking;
+	type PostUnbondingPoolsWindow = frame_support::traits::ConstU32<4>;
+	type MaxMetadataLen = frame_support::traits::ConstU32<256>;
+	// we use the same number of allowed unlocking chunks as with staking.
+	type MaxUnbonding = <Self as pallet_staking::Config>::MaxUnlockingChunks;
+	type PalletId = PoolsPalletId;
+	type MaxPointsToBalance = MaxPointsToBalance;
+	type WeightInfo = weights::pallet_nomination_pools::WeightInfo<Self>;
+}
+
+pub struct InitiateNominationPools;
+impl frame_support::traits::OnRuntimeUpgrade for InitiateNominationPools {
+	fn on_runtime_upgrade() -> frame_support::weights::Weight {
+		// we use one as an indicator if this has already been set.
+		if pallet_nomination_pools::MaxPools::<Runtime>::get().is_none() {
+			// 5 DOT to join a pool.
+			pallet_nomination_pools::MinJoinBond::<Runtime>::put(5 * UNITS);
+			// 100 DOT to create a pool.
+			pallet_nomination_pools::MinCreateBond::<Runtime>::put(100 * UNITS);
+
+			// Initialize with limits for now.
+			pallet_nomination_pools::MaxPools::<Runtime>::put(0);
+			pallet_nomination_pools::MaxPoolMembersPerPool::<Runtime>::put(0);
+			pallet_nomination_pools::MaxPoolMembers::<Runtime>::put(0);
+
+			log::info!(target: "runtime::polkadot", "pools config initiated 🎉");
+			<Runtime as frame_system::Config>::DbWeight::get().reads_writes(1, 5)
+		} else {
+			log::info!(target: "runtime::polkadot", "pools config already initiated 😏");
+			<Runtime as frame_system::Config>::DbWeight::get().reads(1)
+		}
+	}
+}
+
 construct_runtime! {
 	pub enum Runtime where
 		Block = Block,
@@ -1458,6 +1507,9 @@ construct_runtime! {
 		// Provides a semi-sorted list of nominators for staking.
 		VoterList: pallet_bags_list::{Pallet, Call, Storage, Event<T>} = 37,
 
+		// nomination pools: extension to staking.
+		NominationPools: pallet_nomination_pools::{Pallet, Call, Storage, Event<T>, Config<T>} = 39,
+
 		// Parachains pallets. Start indices at 50 to leave room.
 		ParachainsOrigin: parachains_origin::{Pallet, Origin} = 50,
 		Configuration: parachains_configuration::{Pallet, Call, Storage, Config<T>} = 51,
@@ -1515,7 +1567,7 @@ pub type Executive = frame_executive::Executive<
 	frame_system::ChainContext<Runtime>,
 	Runtime,
 	AllPalletsWithSystem,
-	pallet_staking::migrations::v10::MigrateToV10<Runtime>,
+	(pallet_staking::migrations::v10::MigrateToV10<Runtime>, InitiateNominationPools),
 >;
 /// The payload being signed in transactions.
 pub type SignedPayload = generic::SignedPayload<Call, SignedExtra>;
@@ -1558,6 +1610,7 @@ mod benches {
 		[pallet_indices, Indices]
 		[pallet_membership, TechnicalMembership]
 		[pallet_multisig, Multisig]
+		[pallet_nomination_pools, NominationPoolsBench::<Runtime>]
 		[pallet_offences, OffencesBench::<Runtime>]
 		[pallet_preimage, Preimage]
 		[pallet_proxy, Proxy]
@@ -1938,6 +1991,7 @@ sp_api::impl_runtime_apis! {
 			use pallet_session_benchmarking::Pallet as SessionBench;
 			use pallet_offences_benchmarking::Pallet as OffencesBench;
 			use pallet_election_provider_support_benchmarking::Pallet as ElectionProviderBench;
+			use pallet_nomination_pools_benchmarking::Pallet as NominationPoolsBench;
 			use frame_system_benchmarking::Pallet as SystemBench;
 			use frame_benchmarking::baseline::Pallet as Baseline;
 
@@ -1960,6 +2014,7 @@ sp_api::impl_runtime_apis! {
 			use pallet_session_benchmarking::Pallet as SessionBench;
 			use pallet_offences_benchmarking::Pallet as OffencesBench;
 			use pallet_election_provider_support_benchmarking::Pallet as ElectionProviderBench;
+			use pallet_nomination_pools_benchmarking::Pallet as NominationPoolsBench;
 			use frame_system_benchmarking::Pallet as SystemBench;
 			use frame_benchmarking::baseline::Pallet as Baseline;
 
@@ -1968,6 +2023,7 @@ sp_api::impl_runtime_apis! {
 			impl pallet_election_provider_support_benchmarking::Config for Runtime {}
 			impl frame_system_benchmarking::Config for Runtime {}
 			impl frame_benchmarking::baseline::Config for Runtime {}
+			impl pallet_nomination_pools_benchmarking::Config for Runtime {}
 
 			let whitelist: Vec<TrackedStorageKey> = vec![
 				// Block Number

runtime/polkadot/src/weights/mod.rs

@@ -31,6 +31,7 @@ pub mod pallet_im_online;
 pub mod pallet_indices;
 pub mod pallet_membership;
 pub mod pallet_multisig;
+pub mod pallet_nomination_pools;
 pub mod pallet_preimage;
 pub mod pallet_proxy;
 pub mod pallet_scheduler;