Rococo & Westend People Chain (#2281)

Rococo and Westend runtimes for the "People Chain". This chain contains
the Identity pallet with plans to migrate all related data from the
Relay Chain.

Changes `IdentityInfo` to:

- Remove `additional_fields`.
- Add `github` and `discord` as first class fields. From scraping chain
data, these were the only two additional fields used (for the Fellowship
and Ambassador Program, respectively).
- Rename `riot` to `matrix`.

Note: This will use the script in
https://github.com/paritytech/polkadot-sdk/pull/2025 to generate the
genesis state.

TODO:

- [x] https://github.com/paritytech/polkadot-sdk/pull/1814 and
integration of the Identity Migrator pallet for migration.
- [x] Tests: https://github.com/paritytech/polkadot-sdk/pull/2373

---------

Co-authored-by: Muharem <ismailov.m.h@gmail.com>
Co-authored-by: Michal Kucharczyk <1728078+michalkucharczyk@users.noreply.github.com>
Co-authored-by: Dónal Murray <donal.murray@parity.io>
Co-authored-by: Richard Melkonian <35300528+0xmovses@users.noreply.github.com>
Co-authored-by: Liam Aharon <liam.aharon@hotmail.com>

polkadot/runtime/common/src/identity_migrator.rs

@@ -271,7 +271,8 @@ mod benchmarks {
 		let _ = Identity::<T>::set_identity_no_deposit(&target, info.clone());
 
 		let sub_account: T::AccountId = account("sub", 0, SEED);
-		let _ = Identity::<T>::set_sub_no_deposit(&target, sub_account.clone());
+		let name = Data::Raw(b"benchsub".to_vec().try_into().unwrap());
+		let _ = Identity::<T>::set_subs_no_deposit(&target, vec![(sub_account.clone(), name)]);
 
 		// expected deposits
 		let expected_id_deposit = <T as pallet_identity::Config>::BasicDeposit::get()

polkadot/runtime/rococo/src/xcm_config.rs

@@ -25,7 +25,7 @@ use crate::governance::StakingAdmin;
 
 use frame_support::{
 	match_types, parameter_types,
-	traits::{Everything, Nothing},
+	traits::{Equals, Everything, Nothing},
 	weights::Weight,
 };
 use frame_system::EnsureRoot;
@@ -50,6 +50,7 @@ use xcm_builder::{
 use xcm_executor::XcmExecutor;
 
 parameter_types! {
+	pub const RootLocation: MultiLocation = MultiLocation::here();
 	pub const TokenLocation: MultiLocation = Here.into_location();
 	pub const ThisNetwork: NetworkId = NetworkId::Rococo;
 	pub UniversalLocation: InteriorMultiLocation = ThisNetwork::get().into();
@@ -120,6 +121,7 @@ parameter_types! {
 	pub const Contracts: MultiLocation = Parachain(CONTRACTS_ID).into_location();
 	pub const Encointer: MultiLocation = Parachain(ENCOINTER_ID).into_location();
 	pub const BridgeHub: MultiLocation = Parachain(BRIDGE_HUB_ID).into_location();
+	pub const People: MultiLocation = Parachain(PEOPLE_ID).into_location();
 	pub const Broker: MultiLocation = Parachain(BROKER_ID).into_location();
 	pub const Tick: MultiLocation = Parachain(100).into_location();
 	pub const Trick: MultiLocation = Parachain(110).into_location();
@@ -131,6 +133,7 @@ parameter_types! {
 	pub const RocForContracts: (MultiAssetFilter, MultiLocation) = (Roc::get(), Contracts::get());
 	pub const RocForEncointer: (MultiAssetFilter, MultiLocation) = (Roc::get(), Encointer::get());
 	pub const RocForBridgeHub: (MultiAssetFilter, MultiLocation) = (Roc::get(), BridgeHub::get());
+	pub const RocForPeople: (MultiAssetFilter, MultiLocation) = (Roc::get(), People::get());
 	pub const RocForBroker: (MultiAssetFilter, MultiLocation) = (Roc::get(), Broker::get());
 	pub const MaxInstructions: u32 = 100;
 	pub const MaxAssetsIntoHolding: u32 = 64;
@@ -143,6 +146,7 @@ pub type TrustedTeleporters = (
 	xcm_builder::Case<RocForContracts>,
 	xcm_builder::Case<RocForEncointer>,
 	xcm_builder::Case<RocForBridgeHub>,
+	xcm_builder::Case<RocForPeople>,
 	xcm_builder::Case<RocForBroker>,
 );
 
@@ -150,6 +154,9 @@ match_types! {
 	pub type OnlyParachains: impl Contains<MultiLocation> = {
 		MultiLocation { parents: 0, interior: X1(Parachain(_)) }
 	};
+	pub type LocalPlurality: impl Contains<MultiLocation> = {
+		MultiLocation { parents: 0, interior: X1(Plurality { .. }) }
+	};
 }
 
 /// The barriers one of which must be passed for an XCM message to be executed.
@@ -172,6 +179,10 @@ pub type Barrier = TrailingSetTopicAsId<(
 	>,
 )>;
 
+/// Locations that will not be charged fees in the executor, neither for execution nor delivery.
+/// We only waive fees for system functions, which these locations represent.
+pub type WaivedLocations = (SystemParachains, Equals<RootLocation>, LocalPlurality);
+
 pub struct XcmConfig;
 impl xcm_executor::Config for XcmConfig {
 	type RuntimeCall = RuntimeCall;
@@ -198,7 +209,7 @@ impl xcm_executor::Config for XcmConfig {
 	type PalletInstancesInfo = AllPalletsWithSystem;
 	type MaxAssetsIntoHolding = MaxAssetsIntoHolding;
 	type FeeManager = XcmFeeManagerFromComponents<
-		SystemParachains,
+		WaivedLocations,
 		XcmFeeToAccount<Self::AssetTransactor, AccountId, TreasuryAccount>,
 	>;
 	type MessageExporter = ();

polkadot/runtime/westend/constants/src/lib.rs

@@ -107,6 +107,8 @@ pub mod system_parachain {
 	pub const COLLECTIVES_ID: u32 = 1001;
 	/// BridgeHub parachain ID.
 	pub const BRIDGE_HUB_ID: u32 = 1002;
+	/// People Chain parachain ID.
+	pub const PEOPLE_ID: u32 = 1004;
 	/// Brokerage parachain ID.
 	pub const BROKER_ID: u32 = 1005;
 

polkadot/runtime/westend/src/xcm_config.rs

@@ -24,7 +24,7 @@ use super::{
 use crate::governance::pallet_custom_origins::Treasurer;
 use frame_support::{
 	match_types, parameter_types,
-	traits::{Everything, Nothing},
+	traits::{Equals, Everything, Nothing},
 };
 use frame_system::EnsureRoot;
 use pallet_xcm::XcmPassthrough;
@@ -53,6 +53,7 @@ use xcm_builder::{
 use xcm_executor::XcmExecutor;
 
 parameter_types! {
+	pub const RootLocation: MultiLocation = MultiLocation::here();
 	pub const TokenLocation: MultiLocation = Here.into_location();
 	pub const ThisNetwork: NetworkId = Westend;
 	pub const UniversalLocation: InteriorMultiLocation = X1(GlobalConsensus(ThisNetwork::get()));
@@ -116,10 +117,12 @@ parameter_types! {
 	pub const AssetHub: MultiLocation = Parachain(ASSET_HUB_ID).into_location();
 	pub const Collectives: MultiLocation = Parachain(COLLECTIVES_ID).into_location();
 	pub const BridgeHub: MultiLocation = Parachain(BRIDGE_HUB_ID).into_location();
+	pub const People: MultiLocation = Parachain(PEOPLE_ID).into_location();
 	pub const Wnd: MultiAssetFilter = Wild(AllOf { fun: WildFungible, id: Concrete(TokenLocation::get()) });
 	pub const WndForAssetHub: (MultiAssetFilter, MultiLocation) = (Wnd::get(), AssetHub::get());
 	pub const WndForCollectives: (MultiAssetFilter, MultiLocation) = (Wnd::get(), Collectives::get());
 	pub const WndForBridgeHub: (MultiAssetFilter, MultiLocation) = (Wnd::get(), BridgeHub::get());
+	pub const WndForPeople: (MultiAssetFilter, MultiLocation) = (Wnd::get(), People::get());
 	pub const MaxInstructions: u32 = 100;
 	pub const MaxAssetsIntoHolding: u32 = 64;
 }
@@ -128,6 +131,7 @@ pub type TrustedTeleporters = (
 	xcm_builder::Case<WndForAssetHub>,
 	xcm_builder::Case<WndForCollectives>,
 	xcm_builder::Case<WndForBridgeHub>,
+	xcm_builder::Case<WndForPeople>,
 );
 
 match_types! {
@@ -138,6 +142,9 @@ match_types! {
 		MultiLocation { parents: 0, interior: X1(Parachain(COLLECTIVES_ID)) } |
 		MultiLocation { parents: 0, interior: X2(Parachain(COLLECTIVES_ID), Plurality { id: BodyId::Technical, .. }) }
 	};
+	pub type LocalPlurality: impl Contains<MultiLocation> = {
+		MultiLocation { parents: 0, interior: X1(Plurality { .. }) }
+	};
 }
 
 /// The barriers one of which must be passed for an XCM message to be executed.
@@ -160,6 +167,10 @@ pub type Barrier = TrailingSetTopicAsId<(
 	>,
 )>;
 
+/// Locations that will not be charged fees in the executor, neither for execution nor delivery.
+/// We only waive fees for system functions, which these locations represent.
+pub type WaivedLocations = (SystemParachains, Equals<RootLocation>, LocalPlurality);
+
 pub struct XcmConfig;
 impl xcm_executor::Config for XcmConfig {
 	type RuntimeCall = RuntimeCall;
@@ -186,7 +197,7 @@ impl xcm_executor::Config for XcmConfig {
 	type PalletInstancesInfo = AllPalletsWithSystem;
 	type MaxAssetsIntoHolding = MaxAssetsIntoHolding;
 	type FeeManager = XcmFeeManagerFromComponents<
-		SystemParachains,
+		WaivedLocations,
 		XcmFeeToAccount<Self::AssetTransactor, AccountId, TreasuryAccount>,
 	>;
 	type MessageExporter = ();