Referenda and Conviction Voting pallets (#10195)

* Initial draft of new referendum state machine.

* Docs

* Fixes

* Fixes

* Add conviction-voting pallet

* Basic build

* Building

* Some TODOs

* Tests building

* Add missing file

* Basic lifecycle test

* Add couple of tests

* Another test

* More tests

* Fixes

* Fixes

* Formatting

* Fixes

* Tests

* Fixes

* Fixes

* More tests

* Formatting

* First few benchmarks

* First few benchmarks

* Defered queue servicing

* More testing

* Benchmarks

* Fiddly benchmark

* Final nudge benchmarks

* Formatting

* Formatting

* Finished up benchmarks

* cargo run --quiet --release --features=runtime-benchmarks --manifest-path=bin/node/cli/Cargo.toml -- benchmark --chain=dev --steps=50 --repeat=20 --pallet=pallet_referenda --extrinsic=* --execution=wasm --wasm-execution=compiled --heap-pages=4096 --output=./frame/referenda/src/weights.rs --template=./.maintain/frame-weight-template.hbs

* Events finished

* Missing file

* No GenesisConfig for Referenda

* Formatting

* Docs

* Docs

* Docs

* Per-class conviction voting

* New test & mock utils

* More tests

* Tests

* Tests finished 🎉

* Benchmarking stuff

* Fixes

* Test harness

* Test harness

* Benchmarks for Conviction=Voting

* Benchmarking pipeline complete

* Docs

* Formatting

* Remove unneeded warning

* Fix UI tests

* cargo run --quiet --release --features=runtime-benchmarks --manifest-path=bin/node/cli/Cargo.toml -- benchmark --chain=dev --steps=50 --repeat=20 --pallet=pallet_conviction_voting --extrinsic=* --execution=wasm --wasm-execution=compiled --heap-pages=4096 --output=./frame/conviction-voting/src/weights.rs --template=./.maintain/frame-weight-template.hbs

* Docs

* Update frame/conviction-voting/src/vote.rs

Co-authored-by: Shawn Tabrizi <shawntabrizi@gmail.com>

* update sp-runtime version

* MEL Fixes for Referenda and Conviction Voting (#10725)

* free maxencodedlen

* more maxencodedlen

* more MEL

* more mel

* disable storage info

* More Referenda Patches (#10760)

* basic fixes

* fix benchmarking

* fix license

* prevent panic in curve math

* fmt

* bump crate versions

* Update mock.rs

Co-authored-by: Parity Bot <admin@parity.io>
Co-authored-by: Shawn Tabrizi <shawntabrizi@gmail.com>

substrate/bin/node/runtime/Cargo.toml

@@ -64,6 +64,7 @@ pallet-collective = { version = "4.0.0-dev", default-features = false, path = ".
 pallet-contracts = { version = "4.0.0-dev", default-features = false, path = "../../../frame/contracts" }
 pallet-contracts-primitives = { version = "5.0.0", default-features = false, path = "../../../frame/contracts/common/" }
 pallet-contracts-rpc-runtime-api = { version = "4.0.0-dev", default-features = false, path = "../../../frame/contracts/rpc/runtime-api/" }
+pallet-conviction-voting = { version = "4.0.0-dev", default-features = false, path = "../../../frame/conviction-voting" }
 pallet-democracy = { version = "4.0.0-dev", default-features = false, path = "../../../frame/democracy" }
 pallet-election-provider-multi-phase = { version = "4.0.0-dev", default-features = false, path = "../../../frame/election-provider-multi-phase" }
 pallet-elections-phragmen = { version = "5.0.0-dev", default-features = false, path = "../../../frame/elections-phragmen" }
@@ -82,9 +83,8 @@ pallet-preimage = { version = "4.0.0-dev", default-features = false, path = "../
 pallet-proxy = { version = "4.0.0-dev", default-features = false, path = "../../../frame/proxy" }
 pallet-randomness-collective-flip = { version = "4.0.0-dev", default-features = false, path = "../../../frame/randomness-collective-flip" }
 pallet-recovery = { version = "4.0.0-dev", default-features = false, path = "../../../frame/recovery" }
-pallet-session = { version = "4.0.0-dev", features = [
-	"historical",
-], path = "../../../frame/session", default-features = false }
+pallet-referenda = { version = "4.0.0-dev", default-features = false, path = "../../../frame/referenda" }
+pallet-session = { version = "4.0.0-dev", features = [ "historical" ], path = "../../../frame/session", default-features = false }
 pallet-session-benchmarking = { version = "4.0.0-dev", path = "../../../frame/session/benchmarking", default-features = false, optional = true }
 pallet-staking = { version = "4.0.0-dev", default-features = false, path = "../../../frame/staking" }
 pallet-staking-reward-curve = { version = "4.0.0-dev", default-features = false, path = "../../../frame/staking/reward-curve" }
@@ -125,6 +125,7 @@ std = [
 	"pallet-contracts/std",
 	"pallet-contracts-primitives/std",
 	"pallet-contracts-rpc-runtime-api/std",
+	"pallet-conviction-voting/std",
 	"pallet-democracy/std",
 	"pallet-elections-phragmen/std",
 	"frame-executive/std",
@@ -170,6 +171,7 @@ std = [
 	"pallet-utility/std",
 	"sp-version/std",
 	"pallet-society/std",
+	"pallet-referenda/std",
 	"pallet-recovery/std",
 	"pallet-uniques/std",
 	"pallet-vesting/std",
@@ -183,7 +185,6 @@ runtime-benchmarks = [
 	"frame-benchmarking/runtime-benchmarks",
 	"frame-support/runtime-benchmarks",
 	"frame-system/runtime-benchmarks",
-	"pallet-election-provider-multi-phase/runtime-benchmarks",
 	"sp-runtime/runtime-benchmarks",
 	"pallet-assets/runtime-benchmarks",
 	"pallet-babe/runtime-benchmarks",
@@ -193,7 +194,9 @@ runtime-benchmarks = [
 	"pallet-child-bounties/runtime-benchmarks",
 	"pallet-collective/runtime-benchmarks",
 	"pallet-contracts/runtime-benchmarks",
+	"pallet-conviction-voting/runtime-benchmarks",
 	"pallet-democracy/runtime-benchmarks",
+	"pallet-election-provider-multi-phase/runtime-benchmarks",
 	"pallet-elections-phragmen/runtime-benchmarks",
 	"pallet-gilt/runtime-benchmarks",
 	"pallet-grandpa/runtime-benchmarks",
@@ -204,9 +207,12 @@ runtime-benchmarks = [
 	"pallet-membership/runtime-benchmarks",
 	"pallet-mmr/runtime-benchmarks",
 	"pallet-multisig/runtime-benchmarks",
+	"pallet-offences-benchmarking",
 	"pallet-preimage/runtime-benchmarks",
 	"pallet-proxy/runtime-benchmarks",
 	"pallet-scheduler/runtime-benchmarks",
+	"pallet-referenda/runtime-benchmarks",
+	"pallet-session-benchmarking",
 	"pallet-society/runtime-benchmarks",
 	"pallet-staking/runtime-benchmarks",
 	"pallet-timestamp/runtime-benchmarks",
@@ -216,8 +222,6 @@ runtime-benchmarks = [
 	"pallet-utility/runtime-benchmarks",
 	"pallet-uniques/runtime-benchmarks",
 	"pallet-vesting/runtime-benchmarks",
-	"pallet-offences-benchmarking",
-	"pallet-session-benchmarking",
 	"frame-system-benchmarking",
 	"hex-literal",
 ]
@@ -234,35 +238,37 @@ try-runtime = [
 	"pallet-child-bounties/try-runtime",
 	"pallet-collective/try-runtime",
 	"pallet-contracts/try-runtime",
+	"pallet-conviction-voting/try-runtime",
 	"pallet-democracy/try-runtime",
+	"pallet-election-provider-multi-phase/try-runtime",
 	"pallet-elections-phragmen/try-runtime",
+	"pallet-gilt/try-runtime",
 	"pallet-grandpa/try-runtime",
+	"pallet-identity/try-runtime",
 	"pallet-im-online/try-runtime",
 	"pallet-indices/try-runtime",
 	"pallet-lottery/try-runtime",
 	"pallet-membership/try-runtime",
 	"pallet-mmr/try-runtime",
 	"pallet-multisig/try-runtime",
-	"pallet-identity/try-runtime",
-	"pallet-scheduler/try-runtime",
 	"pallet-offences/try-runtime",
 	"pallet-preimage/try-runtime",
 	"pallet-proxy/try-runtime",
 	"pallet-randomness-collective-flip/try-runtime",
+	"pallet-recovery/try-runtime",
+	"pallet-referenda/try-runtime",
+	"pallet-scheduler/try-runtime",
 	"pallet-session/try-runtime",
+	"pallet-society/try-runtime",
 	"pallet-staking/try-runtime",
 	"pallet-sudo/try-runtime",
-	"pallet-election-provider-multi-phase/try-runtime",
 	"pallet-timestamp/try-runtime",
 	"pallet-tips/try-runtime",
 	"pallet-transaction-payment/try-runtime",
 	"pallet-treasury/try-runtime",
-	"pallet-utility/try-runtime",
-	"pallet-society/try-runtime",
-	"pallet-recovery/try-runtime",
 	"pallet-uniques/try-runtime",
+	"pallet-utility/try-runtime",
 	"pallet-vesting/try-runtime",
-	"pallet-gilt/try-runtime",
 ]
 # Make contract callable functions marked as __unstable__ available. Do not enable
 # on live chains as those are subject to change.

substrate/bin/node/runtime/src/lib.rs

@@ -698,6 +698,83 @@ impl pallet_bags_list::Config for Runtime {
 	type BagThresholds = BagThresholds;
 }
 
+parameter_types! {
+	pub const VoteLockingPeriod: BlockNumber = 30 * DAYS;
+}
+
+impl pallet_conviction_voting::Config for Runtime {
+	type WeightInfo = pallet_conviction_voting::weights::SubstrateWeight<Self>;
+	type Event = Event;
+	type Currency = Balances;
+	type VoteLockingPeriod = VoteLockingPeriod;
+	type MaxVotes = ConstU32<512>;
+	type MaxTurnout = frame_support::traits::TotalIssuanceOf<Balances, Self::AccountId>;
+	type Polls = Referenda;
+}
+
+parameter_types! {
+	pub const AlarmInterval: BlockNumber = 1;
+	pub const SubmissionDeposit: Balance = 100 * DOLLARS;
+	pub const UndecidingTimeout: BlockNumber = 28 * DAYS;
+}
+
+pub struct TracksInfo;
+impl pallet_referenda::TracksInfo<Balance, BlockNumber> for TracksInfo {
+	type Id = u8;
+	type Origin = <Origin as frame_support::traits::OriginTrait>::PalletsOrigin;
+	fn tracks() -> &'static [(Self::Id, pallet_referenda::TrackInfo<Balance, BlockNumber>)] {
+		static DATA: [(u8, pallet_referenda::TrackInfo<Balance, BlockNumber>); 1] = [(
+			0u8,
+			pallet_referenda::TrackInfo {
+				name: "root",
+				max_deciding: 1,
+				decision_deposit: 10,
+				prepare_period: 4,
+				decision_period: 4,
+				confirm_period: 2,
+				min_enactment_period: 4,
+				min_approval: pallet_referenda::Curve::LinearDecreasing {
+					begin: Perbill::from_percent(100),
+					delta: Perbill::from_percent(50),
+				},
+				min_turnout: pallet_referenda::Curve::LinearDecreasing {
+					begin: Perbill::from_percent(100),
+					delta: Perbill::from_percent(100),
+				},
+			},
+		)];
+		&DATA[..]
+	}
+	fn track_for(id: &Self::Origin) -> Result<Self::Id, ()> {
+		if let Ok(system_origin) = frame_system::RawOrigin::try_from(id.clone()) {
+			match system_origin {
+				frame_system::RawOrigin::Root => Ok(0),
+				_ => Err(()),
+			}
+		} else {
+			Err(())
+		}
+	}
+}
+
+impl pallet_referenda::Config for Runtime {
+	type WeightInfo = pallet_referenda::weights::SubstrateWeight<Self>;
+	type Call = Call;
+	type Event = Event;
+	type Scheduler = Scheduler;
+	type Currency = pallet_balances::Pallet<Self>;
+	type CancelOrigin = EnsureRoot<AccountId>;
+	type KillOrigin = EnsureRoot<AccountId>;
+	type Slash = ();
+	type Votes = pallet_conviction_voting::VotesOf<Runtime>;
+	type Tally = pallet_conviction_voting::TallyOf<Runtime>;
+	type SubmissionDeposit = SubmissionDeposit;
+	type MaxQueued = ConstU32<100>;
+	type UndecidingTimeout = UndecidingTimeout;
+	type AlarmInterval = AlarmInterval;
+	type Tracks = TracksInfo;
+}
+
 parameter_types! {
 	pub const LaunchPeriod: BlockNumber = 28 * 24 * 60 * MINUTES;
 	pub const VotingPeriod: BlockNumber = 28 * 24 * 60 * MINUTES;
@@ -1336,6 +1413,8 @@ construct_runtime!(
 		TransactionStorage: pallet_transaction_storage,
 		BagsList: pallet_bags_list,
 		ChildBounties: pallet_child_bounties,
+		Referenda: pallet_referenda,
+		ConvictionVoting: pallet_conviction_voting,
 	}
 );
 
@@ -1405,6 +1484,7 @@ mod benches {
 		[pallet_bounties, Bounties]
 		[pallet_child_bounties, ChildBounties]
 		[pallet_collective, Council]
+		[pallet_conviction_voting, ConvictionVoting]
 		[pallet_contracts, Contracts]
 		[pallet_democracy, Democracy]
 		[pallet_election_provider_multi_phase, ElectionProviderMultiPhase]
@@ -1421,6 +1501,7 @@ mod benches {
 		[pallet_offences, OffencesBench::<Runtime>]
 		[pallet_preimage, Preimage]
 		[pallet_proxy, Proxy]
+		[pallet_referenda, Referenda]
 		[pallet_scheduler, Scheduler]
 		[pallet_session, SessionBench::<Runtime>]
 		[pallet_staking, Staking]