Introduce/integrate a collective into Rococo Relay (#2869)

* Introduce a collective into Rococo runtime

* Intregrate Rococo Collective into XCM

* Fixes

* Update runtime/rococo/src/lib.rs

Co-authored-by: Robert Habermeier <rphmeier@gmail.com>

polkadot/Cargo.lock

@@ -7335,6 +7335,7 @@ dependencies = [
  "pallet-grandpa",
  "pallet-im-online",
  "pallet-indices",
+ "pallet-membership",
  "pallet-mmr",
  "pallet-mmr-primitives",
  "pallet-offences",

polkadot/node/service/src/chain_spec.rs

@@ -881,6 +881,8 @@ fn rococo_staging_testnet_config_genesis(wasm_binary: &[u8]) -> rococo_runtime::
 		},
 		pallet_grandpa: Default::default(),
 		pallet_im_online: Default::default(),
+		pallet_collective: Default::default(),
+		pallet_membership: Default::default(),
 		pallet_authority_discovery: rococo_runtime::AuthorityDiscoveryConfig {
 			keys: vec![],
 		},
@@ -1432,6 +1434,8 @@ pub fn rococo_testnet_genesis(
 		},
 		pallet_grandpa: Default::default(),
 		pallet_im_online: Default::default(),
+		pallet_collective: Default::default(),
+		pallet_membership: Default::default(),
 		pallet_authority_discovery: rococo_runtime::AuthorityDiscoveryConfig {
 			keys: vec![],
 		},

polkadot/runtime/rococo/Cargo.toml

@@ -40,6 +40,7 @@ pallet-collective = { git = "https://github.com/paritytech/substrate", branch =
 pallet-grandpa = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
 pallet-im-online = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
 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-mmr = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
 pallet-mmr-primitives = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
 pallet-transaction-payment = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
@@ -87,6 +88,7 @@ std = [
 	"pallet-beefy/std",
 	"pallet-grandpa/std",
 	"pallet-sudo/std",
+	"pallet-membership/std",
 	"pallet-mmr/std",
 	"pallet-mmr-primitives/std",
 	"pallet-indices/std",
@@ -159,6 +161,7 @@ try-runtime = [
 	"pallet-sudo/try-runtime",
 	"pallet-indices/try-runtime",
 	"pallet-im-online/try-runtime",
+	"pallet-membership/try-runtime",
 	"pallet-session/try-runtime",
 	"pallet-staking/try-runtime",
 	"pallet-offences/try-runtime",

polkadot/runtime/rococo/src/lib.rs

@@ -85,14 +85,10 @@ use runtime_parachains::scheduler as parachains_scheduler;
 pub use pallet_balances::Call as BalancesCall;
 
 use polkadot_parachain::primitives::Id as ParaId;
-use xcm::v0::{MultiLocation, NetworkId};
+
+use xcm::v0::{MultiLocation, NetworkId, BodyId};
 use xcm_executor::XcmExecutor;
-use xcm_builder::{
-	AccountId32Aliases, ChildParachainConvertsVia, SovereignSignedViaLocation,
-	CurrencyAdapter as XcmCurrencyAdapter, ChildParachainAsNative,
-	SignedAccountId32AsNative, ChildSystemParachainAsSuperuser, LocationInverter,
-	IsConcrete, FixedWeightBounds, FixedRateOfConcreteFungible,
-};
+use xcm_builder::{AccountId32Aliases, ChildParachainConvertsVia, SovereignSignedViaLocation, CurrencyAdapter as XcmCurrencyAdapter, ChildParachainAsNative, SignedAccountId32AsNative, ChildSystemParachainAsSuperuser, LocationInverter, IsConcrete, FixedWeightBounds, FixedRateOfConcreteFungible, BackingToPlurality, SignedToAccountId32};
 use constants::{time::*, currency::*, fee::*};
 use frame_support::traits::InstanceFilter;
 
@@ -273,6 +269,10 @@ construct_runtime! {
 		// Validator Manager pallet.
 		ValidatorManager: validator_manager::{Pallet, Call, Storage, Event<T>},
 
+		// A "council"
+		Collective: pallet_collective::{Pallet, Call, Storage, Origin<T>, Event<T>, Config<T>} = 80,
+		Membership: pallet_membership::{Pallet, Call, Storage, Event<T>, Config<T>} = 81,
+
 		Utility: pallet_utility::{Pallet, Call, Event} = 90,
 		Proxy: pallet_proxy::{Pallet, Call, Storage, Event<T>} = 91,
 
@@ -645,9 +645,17 @@ impl xcm_executor::Config for XcmConfig {
 	type ResponseHandler = ();
 }
 
+parameter_types! {
+	pub const CollectiveBodyId: BodyId = BodyId::Unit;
+}
+
 /// Type to convert an `Origin` type value into a `MultiLocation` value which represents an interior location
 /// of this chain.
 pub type LocalOriginToLocation = (
+	// We allow an origin from the Collective pallet to be used in XCM as a corresponding Plurality
+	BackingToPlurality<Origin, pallet_collective::Origin<Runtime>, CollectiveBodyId>,
+	// And a usual Signed origin to be used in XCM as a corresponding AccountId32
+	SignedToAccountId32<Origin, AccountId, RococoNetwork>,
 );
 
 impl pallet_xcm::Config for Runtime {
@@ -856,6 +864,34 @@ impl pallet_proxy::Config for Runtime {
 	type AnnouncementDepositFactor = AnnouncementDepositFactor;
 }
 
+parameter_types! {
+	pub const MotionDuration: BlockNumber = 5;
+	pub const MaxProposals: u32 = 100;
+	pub const MaxMembers: u32 = 100;
+}
+
+impl pallet_collective::Config for Runtime {
+	type Origin = Origin;
+	type Proposal = Call;
+	type Event = Event;
+	type MotionDuration = MotionDuration;
+	type MaxProposals = MaxProposals;
+	type MaxMembers = MaxMembers;
+	type DefaultVote = pallet_collective::PrimeDefaultVote;
+	type WeightInfo = ();
+}
+
+impl pallet_membership::Config for Runtime {
+	type Event = Event;
+	type AddOrigin = EnsureRoot<AccountId>;
+	type RemoveOrigin = EnsureRoot<AccountId>;
+	type SwapOrigin = EnsureRoot<AccountId>;
+	type ResetOrigin = EnsureRoot<AccountId>;
+	type PrimeOrigin = EnsureRoot<AccountId>;
+	type MembershipInitialized = Collective;
+	type MembershipChanged = Collective;
+}
+
 #[cfg(not(feature = "disable-runtime-api"))]
 sp_api::impl_runtime_apis! {
 	impl sp_api::Core<Block> for Runtime {

polkadot/xcm/xcm-builder/src/lib.rs

@@ -31,7 +31,7 @@ mod origin_conversion;
 pub use origin_conversion::{
 	SovereignSignedViaLocation, ParentAsSuperuser, ChildSystemParachainAsSuperuser, SiblingSystemParachainAsSuperuser,
 	ChildParachainAsNative, SiblingParachainAsNative, RelayChainAsNative, SignedAccountId32AsNative,
-	SignedAccountKey20AsNative, EnsureXcmOrigin, SignedToAccountId32
+	SignedAccountKey20AsNative, EnsureXcmOrigin, SignedToAccountId32, BackingToPlurality,
 };
 
 mod barriers;