Fast Fellowship Promote Tracks (polkadot-fellows#356)

Add fast promotion tracks with 7 days (instead of 30 days) voting
period.
The tracks have a 50% turnout and 66% approval criteria. To be used in
combination with paritytech/polkadot-sdk#4778.

It could be that the 50% turnout is too much for tracks I and II, but
for III there are not so many fellows so we can expect them to all vote
IMHO.

---------

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>
Co-authored-by: joe petrowski <25483142+joepetrowski@users.noreply.github.com>

CHANGELOG.md

@@ -42,8 +42,13 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Runtime apis to help with delegate-stake based Nomination Pools ([SDK v1.13 #4537](https://github.com/paritytech/polkadot-sdk/pull/4537)).
 - Kusama system chains: enable PoV-reclaim.
 
+### Added
+
+- Fast promotion tracks for the Fellowship ranks I-III ([polkadot-fellows/runtimes#356](https://github.com/polkadot-fellows/runtimes/pull/356)).
+
 ### Changed
 
+- Polkadot chains: allow arbitrary XCM execution ([polkadot-fellows/runtimes#345](https://github.com/polkadot-fellows/runtimes/pull/345)).
 - Bounties: Remove payout delay ([polkadot-fellows/runtimes#386](https://github.com/polkadot-fellows/runtimes/pull/386)).
 - Polkadot System Chains: Reduce the base transaction fee by half ([polkadot-fellows/runtimes#398](https://github.com/polkadot-fellows/runtimes/pull/398)).
 

system-parachains/collectives/collectives-polkadot/src/fellowship/mod.rs

@@ -19,6 +19,7 @@
 mod origins;
 mod tracks;
 use crate::{
+	fellowship::origins::EnsureCanFastPromoteTo,
 	impls::ToParentTreasury,
 	weights,
 	xcm_config::{AssetHubUsdt, LocationToAccountId, TreasurerBodyId},
@@ -33,7 +34,7 @@ use frame_support::{
 	},
 	PalletId,
 };
-use frame_system::{EnsureNever, EnsureRoot, EnsureRootWithSuccess, EnsureWithSuccess};
+use frame_system::{EnsureRoot, EnsureRootWithSuccess};
 pub use origins::{
 	pallet_origins as pallet_fellowship_origins, Architects, EnsureCanPromoteTo, EnsureCanRetainAt,
 	EnsureFellowship, Fellows, Masters, Members, ToVoice,
@@ -206,8 +207,7 @@ impl pallet_core_fellowship::Config<FellowshipCoreInstance> for Runtime {
 		>,
 		EnsureCanPromoteTo,
 	>;
-	// TODO until https://github.com/polkadot-fellows/runtimes/pull/356/files
-	type FastPromoteOrigin = EnsureWithSuccess<EnsureNever<u16>, AccountId, ConstU16<0>>;
+	type FastPromoteOrigin = EnsureCanFastPromoteTo;
 	type EvidenceSize = ConstU32<65536>;
 	type MaxRank = ConstU32<9>;
 }

system-parachains/collectives/collectives-polkadot/src/fellowship/origins.rs

@@ -99,6 +99,16 @@ pub mod pallet_origins {
 		/// Origin aggregated through weighted votes of those with rank 8 or above when voting on
 		/// a month-long track; `Success` is 6.
 		PromoteTo6Dan,
+
+		/// Origin aggregated through weighted votes of those with rank 3 or above when voting on
+		/// a 30 day long track; `Success` is 1.
+		FastPromoteTo1Dan,
+		/// Origin aggregated through weighted votes of those with rank 4 or above when voting on
+		/// a 30 day long track; `Success` is 2.
+		FastPromoteTo2Dan,
+		/// Origin aggregated through weighted votes of those with rank 5 or above when voting on
+		/// a 30 day long track; `Success` is 3.
+		FastPromoteTo3Dan,
 	}
 
 	impl Origin {
@@ -244,4 +254,14 @@ pub mod pallet_origins {
 			PromoteTo6Dan = ranks::DAN_6,
 		}
 	}
+
+	// Fellowship origin indicating weighted voting from at least the rank of `Success + 2` on
+	// a 30 day long track; needed for fast Fellowship promotion voting.
+	decl_ensure! {
+		pub type EnsureCanFastPromoteTo: EnsureOrigin<Success = Rank> {
+			FastPromoteTo1Dan = ranks::DAN_1,
+			FastPromoteTo2Dan = ranks::DAN_2,
+			FastPromoteTo3Dan = ranks::DAN_3,
+		}
+	}
 }

system-parachains/collectives/collectives-polkadot/src/fellowship/tracks.rs

@@ -56,6 +56,12 @@ pub mod constants {
 	pub const PROMOTE_TO_4DAN: TrackId = 24;
 	pub const PROMOTE_TO_5DAN: TrackId = 25;
 	pub const PROMOTE_TO_6DAN: TrackId = 26;
+
+	// Fast track promotions (30 days) used to fast-track promotions. This works out as the track ID
+	// minus 28.
+	pub const FAST_PROMOTE_TO_1DAN: TrackId = 31;
+	pub const FAST_PROMOTE_TO_2DAN: TrackId = 32;
+	pub const FAST_PROMOTE_TO_3DAN: TrackId = 33;
 }
 
 /// Convert the track ID (defined above) into the minimum rank (i.e. fellowship Dan grade) required
@@ -71,6 +77,9 @@ impl Convert<TrackId, Rank> for MinRankOfClass {
 			// A promotion vote; the track ID turns out to be 18 more than the minimum required
 			// rank.
 			promotion @ 21..=26 => promotion - 18,
+			// A fast promotion vote; the track ID turns out to be 28 more than the minimum required
+			// rank.
+			fast_promote @ 31..=33 => fast_promote - 28,
 			_ => Rank::MAX,
 		}
 	}
@@ -110,13 +119,32 @@ const PROMOTE_MIN_SUPPORT: pallet_referenda::Curve = pallet_referenda::Curve::Li
 	ceil: Perbill::from_percent(100),
 };
 
+const FAST_PROMOTE_MAX_DECIDING: u32 = 10;
+const FAST_PROMOTE_DECISION_DEPOSIT: Balance = 5 * DOLLARS;
+const FAST_PROMOTE_PREPARE_PERIOD: BlockNumber = 0;
+const FAST_PROMOTE_DECISION_PERIOD: BlockNumber = 30 * DAYS;
+const FAST_PROMOTE_CONFIRM_PERIOD: BlockNumber = HOURS;
+const FAST_PROMOTE_MIN_ENACTMENT_PERIOD: BlockNumber = 0;
+const FAST_PROMOTE_MIN_APPROVAL: pallet_referenda::Curve =
+	pallet_referenda::Curve::LinearDecreasing {
+		length: Perbill::from_percent(100),
+		floor: Perbill::from_percent(66),
+		ceil: Perbill::from_percent(100),
+	};
+const FAST_PROMOTE_MIN_SUPPORT: pallet_referenda::Curve =
+	pallet_referenda::Curve::LinearDecreasing {
+		length: Perbill::from_percent(100),
+		floor: Perbill::from_percent(50),
+		ceil: Perbill::from_percent(100),
+	};
+
 pub struct TracksInfo;
 impl pallet_referenda::TracksInfo<Balance, BlockNumber> for TracksInfo {
 	type Id = TrackId;
 	type RuntimeOrigin = <RuntimeOrigin as frame_support::traits::OriginTrait>::PalletsOrigin;
 	fn tracks() -> &'static [(Self::Id, pallet_referenda::TrackInfo<Balance, BlockNumber>)] {
 		use constants as tracks;
-		static DATA: [(TrackId, pallet_referenda::TrackInfo<Balance, BlockNumber>); 21] = [
+		static DATA: [(TrackId, pallet_referenda::TrackInfo<Balance, BlockNumber>); 24] = [
 			(
 				tracks::MEMBERS,
 				pallet_referenda::TrackInfo {
@@ -483,6 +511,48 @@ impl pallet_referenda::TracksInfo<Balance, BlockNumber> for TracksInfo {
 					min_support: PROMOTE_MIN_SUPPORT,
 				},
 			),
+			(
+				tracks::FAST_PROMOTE_TO_1DAN,
+				pallet_referenda::TrackInfo {
+					name: "fast promote to I Dan",
+					max_deciding: FAST_PROMOTE_MAX_DECIDING,
+					decision_deposit: FAST_PROMOTE_DECISION_DEPOSIT,
+					prepare_period: FAST_PROMOTE_PREPARE_PERIOD,
+					decision_period: FAST_PROMOTE_DECISION_PERIOD,
+					confirm_period: FAST_PROMOTE_CONFIRM_PERIOD,
+					min_enactment_period: FAST_PROMOTE_MIN_ENACTMENT_PERIOD,
+					min_approval: FAST_PROMOTE_MIN_APPROVAL,
+					min_support: FAST_PROMOTE_MIN_SUPPORT,
+				},
+			),
+			(
+				tracks::FAST_PROMOTE_TO_2DAN,
+				pallet_referenda::TrackInfo {
+					name: "fast promote to II Dan",
+					max_deciding: FAST_PROMOTE_MAX_DECIDING,
+					decision_deposit: FAST_PROMOTE_DECISION_DEPOSIT,
+					prepare_period: FAST_PROMOTE_PREPARE_PERIOD,
+					decision_period: FAST_PROMOTE_DECISION_PERIOD,
+					confirm_period: FAST_PROMOTE_CONFIRM_PERIOD,
+					min_enactment_period: FAST_PROMOTE_MIN_ENACTMENT_PERIOD,
+					min_approval: FAST_PROMOTE_MIN_APPROVAL,
+					min_support: FAST_PROMOTE_MIN_SUPPORT,
+				},
+			),
+			(
+				tracks::FAST_PROMOTE_TO_3DAN,
+				pallet_referenda::TrackInfo {
+					name: "fast promote to III Dan",
+					max_deciding: FAST_PROMOTE_MAX_DECIDING,
+					decision_deposit: FAST_PROMOTE_DECISION_DEPOSIT,
+					prepare_period: FAST_PROMOTE_PREPARE_PERIOD,
+					decision_period: FAST_PROMOTE_DECISION_PERIOD,
+					confirm_period: FAST_PROMOTE_CONFIRM_PERIOD,
+					min_enactment_period: FAST_PROMOTE_MIN_ENACTMENT_PERIOD,
+					min_approval: FAST_PROMOTE_MIN_APPROVAL,
+					min_support: FAST_PROMOTE_MIN_SUPPORT,
+				},
+			),
 		];
 		&DATA[..]
 	}
@@ -525,7 +595,11 @@ impl pallet_referenda::TracksInfo<Balance, BlockNumber> for TracksInfo {
 			Ok(Origin::PromoteTo5Dan) => Ok(tracks::PROMOTE_TO_5DAN),
 			Ok(Origin::PromoteTo6Dan) => Ok(tracks::PROMOTE_TO_6DAN),
 
-			_ => Err(()),
+			Ok(Origin::FastPromoteTo1Dan) => Ok(tracks::FAST_PROMOTE_TO_1DAN),
+			Ok(Origin::FastPromoteTo2Dan) => Ok(tracks::FAST_PROMOTE_TO_2DAN),
+			Ok(Origin::FastPromoteTo3Dan) => Ok(tracks::FAST_PROMOTE_TO_3DAN),
+
+			Err(_) => Err(()),
 		}
 	}
 }