Rococo: ability to programatically assign slots to teams (#3943)

* Permanent & Temp parachain slots on Rococo - WIP

* Revert test change

* Revert test change

* Fix formatting

* Extract logic to separate assigned_slots pallet

* Formatting

* Parachain downgrade logic

* Pallet doc comment

* Revert unnecessary changes

* Fix few issues, tweak temp slots allocation logic; add a bunch of tests

* Address review comments; track active temp slots

* Update runtime/common/src/assigned_slots.rs

* Update runtime/common/src/assigned_slots.rs

* Remove assigned_slots calls from paras_sudo_wrapper

* Unassign is a perfectly valid verb

* Remove unneeded collect

* Update code following #3980

* Cleanup

* Generate storage info for pallet

* Address review comments

* Add ForceOrigin to slots pallet

* Track permanent slot duration in storage

* Fix tests build

Co-authored-by: Alexander Popiak <alexander.popiak@parity.io>

polkadot/parachain/src/primitives.rs

@@ -20,7 +20,7 @@
 use sp_std::vec::Vec;
 
 use frame_support::weights::Weight;
-use parity_scale_codec::{CompactAs, Decode, Encode};
+use parity_scale_codec::{CompactAs, Decode, Encode, MaxEncodedLen};
 use scale_info::TypeInfo;
 use sp_core::{RuntimeDebug, TypeId};
 use sp_runtime::traits::Hash as _;
@@ -139,6 +139,7 @@ pub struct BlockData(#[cfg_attr(feature = "std", serde(with = "bytes"))] pub Vec
 	Encode,
 	Eq,
 	Hash,
+	MaxEncodedLen,
 	Ord,
 	PartialEq,
 	PartialOrd,

polkadot/runtime/common/src/integration_tests.rs

@@ -216,6 +216,7 @@ impl slots::Config for Test {
 	type Registrar = Registrar;
 	type LeasePeriod = LeasePeriod;
 	type LeaseOffset = LeaseOffset;
+	type ForceOrigin = EnsureRoot<AccountId>;
 	type WeightInfo = crate::slots::TestWeightInfo;
 }
 

polkadot/runtime/common/src/lib.rs

@@ -18,6 +18,7 @@
 
 #![cfg_attr(not(feature = "std"), no_std)]
 
+pub mod assigned_slots;
 pub mod auctions;
 pub mod claims;
 pub mod crowdloan;

polkadot/runtime/common/src/slots.rs

@@ -87,6 +87,9 @@ pub mod pallet {
 		#[pallet::constant]
 		type LeaseOffset: Get<Self::BlockNumber>;
 
+		/// The origin which may forcibly create or clear leases. Root can always do this.
+		type ForceOrigin: EnsureOrigin<<Self as frame_system::Config>::Origin>;
+
 		/// Weight Information for the Extrinsics in the Pallet
 		type WeightInfo: WeightInfo;
 	}
@@ -159,7 +162,7 @@ pub mod pallet {
 		/// Just a connect into the `lease_out` call, in case Root wants to force some lease to happen
 		/// independently of any other on-chain mechanism to use it.
 		///
-		/// Can only be called by the Root origin.
+		/// The dispatch origin for this call must match `T::ForceOrigin`.
 		#[pallet::weight(T::WeightInfo::force_lease())]
 		pub fn force_lease(
 			origin: OriginFor<T>,
@@ -169,7 +172,7 @@ pub mod pallet {
 			period_begin: LeasePeriodOf<T>,
 			period_count: LeasePeriodOf<T>,
 		) -> DispatchResult {
-			ensure_root(origin)?;
+			T::ForceOrigin::ensure_origin(origin)?;
 			Self::lease_out(para, &leaser, amount, period_begin, period_count)
 				.map_err(|_| Error::<T>::LeaseError)?;
 			Ok(())
@@ -177,10 +180,10 @@ pub mod pallet {
 
 		/// Clear all leases for a Para Id, refunding any deposits back to the original owners.
 		///
-		/// Can only be called by the Root origin.
+		/// The dispatch origin for this call must match `T::ForceOrigin`.
 		#[pallet::weight(T::WeightInfo::clear_all_leases())]
 		pub fn clear_all_leases(origin: OriginFor<T>, para: ParaId) -> DispatchResult {
-			ensure_root(origin)?;
+			T::ForceOrigin::ensure_origin(origin)?;
 			let deposits = Self::all_deposits_held(para);
 
 			// Refund any deposits for these leases
@@ -495,6 +498,7 @@ mod tests {
 
 	use crate::{mock::TestRegistrar, slots};
 	use frame_support::{assert_noop, assert_ok, parameter_types};
+	use frame_system::EnsureRoot;
 	use pallet_balances;
 	use primitives::v1::{BlockNumber, Header};
 	use sp_core::H256;
@@ -572,6 +576,7 @@ mod tests {
 		type Registrar = TestRegistrar<Test>;
 		type LeasePeriod = LeasePeriod;
 		type LeaseOffset = LeaseOffset;
+		type ForceOrigin = EnsureRoot<Self::AccountId>;
 		type WeightInfo = crate::slots::TestWeightInfo;
 	}
 

polkadot/runtime/kusama/src/lib.rs

@@ -1238,6 +1238,7 @@ impl slots::Config for Runtime {
 	type Registrar = Registrar;
 	type LeasePeriod = LeasePeriod;
 	type LeaseOffset = ();
+	type ForceOrigin = MoreThanHalfCouncil;
 	type WeightInfo = weights::runtime_common_slots::WeightInfo<Runtime>;
 }
 

polkadot/runtime/polkadot/src/lib.rs

@@ -1228,6 +1228,7 @@ impl slots::Config for Runtime {
 	type Registrar = Registrar;
 	type LeasePeriod = LeasePeriod;
 	type LeaseOffset = LeaseOffset;
+	type ForceOrigin = MoreThanHalfCouncil;
 	type WeightInfo = weights::runtime_common_slots::WeightInfo<Runtime>;
 }
 

polkadot/runtime/rococo/src/lib.rs

@@ -43,8 +43,9 @@ use primitives::v1::{
 	ValidatorIndex,
 };
 use runtime_common::{
-	auctions, crowdloan, impls::ToAuthor, paras_registrar, paras_sudo_wrapper, slots, xcm_sender,
-	BlockHashCount, BlockLength, BlockWeights, RocksDbWeight, SlowAdjustingFeeUpdate,
+	assigned_slots, auctions, crowdloan, impls::ToAuthor, paras_registrar, paras_sudo_wrapper,
+	slots, xcm_sender, BlockHashCount, BlockLength, BlockWeights, RocksDbWeight,
+	SlowAdjustingFeeUpdate,
 };
 use runtime_parachains::{self, runtime_api_impl::v1 as runtime_api_impl};
 use scale_info::TypeInfo;
@@ -239,11 +240,12 @@ construct_runtime! {
 		ParasDisputes: parachains_disputes,
 
 		// Parachain Onboarding Pallets
-		Registrar: paras_registrar,
-		Auctions: auctions,
-		Crowdloan: crowdloan,
-		Slots: slots,
-		ParasSudoWrapper: paras_sudo_wrapper,
+		Registrar: paras_registrar::{Pallet, Call, Storage, Event<T>, Config},
+		Auctions: auctions::{Pallet, Call, Storage, Event<T>},
+		Crowdloan: crowdloan::{Pallet, Call, Storage, Event<T>},
+		Slots: slots::{Pallet, Call, Storage, Event<T>},
+		ParasSudoWrapper: paras_sudo_wrapper::{Pallet, Call},
+		AssignedSlots: assigned_slots::{Pallet, Call, Storage, Event<T>},
 
 		// Sudo
 		Sudo: pallet_sudo,
@@ -786,6 +788,25 @@ impl parachains_initializer::Config for Runtime {
 
 impl paras_sudo_wrapper::Config for Runtime {}
 
+parameter_types! {
+	pub const PermanentSlotLeasePeriodLength: u32 = 26;
+	pub const TemporarySlotLeasePeriodLength: u32 = 1;
+	pub const MaxPermanentSlots: u32 = 5;
+	pub const MaxTemporarySlots: u32 = 20;
+	pub const MaxTemporarySlotPerLeasePeriod: u32 = 5;
+}
+
+impl assigned_slots::Config for Runtime {
+	type Event = Event;
+	type AssignSlotOrigin = EnsureRoot<AccountId>;
+	type Leaser = Slots;
+	type PermanentSlotLeasePeriodLength = PermanentSlotLeasePeriodLength;
+	type TemporarySlotLeasePeriodLength = TemporarySlotLeasePeriodLength;
+	type MaxPermanentSlots = MaxPermanentSlots;
+	type MaxTemporarySlots = MaxTemporarySlots;
+	type MaxTemporarySlotPerLeasePeriod = MaxTemporarySlotPerLeasePeriod;
+}
+
 parameter_types! {
 	pub const ParaDeposit: Balance = 5 * DOLLARS;
 	pub const DataDepositPerByte: Balance = deposit(0, 1);
@@ -1019,7 +1040,7 @@ impl auctions::Config for Runtime {
 }
 
 parameter_types! {
-	pub const LeasePeriod: BlockNumber = 1 * DAYS;
+	pub const LeasePeriod: BlockNumber = 7 * DAYS;
 }
 
 impl slots::Config for Runtime {
@@ -1028,6 +1049,7 @@ impl slots::Config for Runtime {
 	type Registrar = Registrar;
 	type LeasePeriod = LeasePeriod;
 	type LeaseOffset = ();
+	type ForceOrigin = EnsureRoot<AccountId>;
 	type WeightInfo = slots::TestWeightInfo;
 }
 
@@ -1108,8 +1130,9 @@ impl InstanceFilter<Call> for ProxyType {
 	fn filter(&self, c: &Call) -> bool {
 		match self {
 			ProxyType::Any => true,
-			ProxyType::CancelProxy =>
-				matches!(c, Call::Proxy(pallet_proxy::Call::reject_announcement { .. })),
+			ProxyType::CancelProxy => {
+				matches!(c, Call::Proxy(pallet_proxy::Call::reject_announcement { .. }))
+			},
 			ProxyType::Auction => matches!(
 				c,
 				Call::Auctions { .. } |

polkadot/runtime/westend/src/lib.rs

@@ -29,9 +29,10 @@ use primitives::v1::{
 	SessionInfo, Signature, ValidationCode, ValidationCodeHash, ValidatorId, ValidatorIndex,
 };
 use runtime_common::{
-	auctions, crowdloan, impls::ToAuthor, paras_registrar, paras_sudo_wrapper, slots, xcm_sender,
-	BlockHashCount, BlockLength, BlockWeights, CurrencyToVote, OffchainSolutionLengthLimit,
-	OffchainSolutionWeightLimit, RocksDbWeight, SlowAdjustingFeeUpdate,
+	assigned_slots, auctions, crowdloan, impls::ToAuthor, paras_registrar, paras_sudo_wrapper,
+	slots, xcm_sender, BlockHashCount, BlockLength, BlockWeights, CurrencyToVote,
+	OffchainSolutionLengthLimit, OffchainSolutionWeightLimit, RocksDbWeight,
+	SlowAdjustingFeeUpdate,
 };
 use sp_std::{collections::btree_map::BTreeMap, prelude::*};
 
@@ -862,6 +863,25 @@ impl parachains_initializer::Config for Runtime {
 
 impl paras_sudo_wrapper::Config for Runtime {}
 
+parameter_types! {
+	pub const PermanentSlotLeasePeriodLength: u32 = 26;
+	pub const TemporarySlotLeasePeriodLength: u32 = 1;
+	pub const MaxPermanentSlots: u32 = 5;
+	pub const MaxTemporarySlots: u32 = 20;
+	pub const MaxTemporarySlotPerLeasePeriod: u32 = 5;
+}
+
+impl assigned_slots::Config for Runtime {
+	type Event = Event;
+	type AssignSlotOrigin = EnsureRoot<AccountId>;
+	type Leaser = Slots;
+	type PermanentSlotLeasePeriodLength = PermanentSlotLeasePeriodLength;
+	type TemporarySlotLeasePeriodLength = TemporarySlotLeasePeriodLength;
+	type MaxPermanentSlots = MaxPermanentSlots;
+	type MaxTemporarySlots = MaxTemporarySlots;
+	type MaxTemporarySlotPerLeasePeriod = MaxTemporarySlotPerLeasePeriod;
+}
+
 parameter_types! {
 	pub const ParaDeposit: Balance = 2000 * CENTS;
 	pub const DataDepositPerByte: Balance = deposit(0, 1);
@@ -887,6 +907,7 @@ impl slots::Config for Runtime {
 	type Registrar = Registrar;
 	type LeasePeriod = LeasePeriod;
 	type LeaseOffset = ();
+	type ForceOrigin = EnsureRoot<AccountId>;
 	type WeightInfo = weights::runtime_common_slots::WeightInfo<Runtime>;
 }
 
@@ -1112,6 +1133,7 @@ construct_runtime! {
 		ParasSudoWrapper: paras_sudo_wrapper::{Pallet, Call} = 62,
 		Auctions: auctions::{Pallet, Call, Storage, Event<T>} = 63,
 		Crowdloan: crowdloan::{Pallet, Call, Storage, Event<T>} = 64,
+		AssignedSlots: assigned_slots::{Pallet, Call, Storage, Event<T>} = 65,
 
 		// Pallet for sending XCM.
 		XcmPallet: pallet_xcm::{Pallet, Call, Storage, Event<T>, Origin, Config} = 99,

polkadot/scripts/gitlab/lingua.dic

@@ -280,6 +280,7 @@ typesystem
 ubuntu/M
 UDP
 UI
+unassign
 unconcluded
 unfinalize/B
 unfinalized