Rococo & Westend People Chain

Cargo.toml

@@ -67,6 +67,8 @@ members = [
 	"cumulus/parachains/integration-tests/emulated/chains/parachains/bridges/bridge-hub-rococo",
 	"cumulus/parachains/integration-tests/emulated/chains/parachains/bridges/bridge-hub-westend",
 	"cumulus/parachains/integration-tests/emulated/chains/parachains/collectives/collectives-westend",
+	"cumulus/parachains/integration-tests/emulated/chains/parachains/people/people-rococo",
+	"cumulus/parachains/integration-tests/emulated/chains/parachains/people/people-westend",
 	"cumulus/parachains/integration-tests/emulated/chains/parachains/testing/penpal",
 	"cumulus/parachains/integration-tests/emulated/chains/relays/rococo",
 	"cumulus/parachains/integration-tests/emulated/chains/relays/westend",
@@ -78,6 +80,8 @@ members = [
 	"cumulus/parachains/integration-tests/emulated/tests/assets/asset-hub-westend",
 	"cumulus/parachains/integration-tests/emulated/tests/bridges/bridge-hub-rococo",
 	"cumulus/parachains/integration-tests/emulated/tests/bridges/bridge-hub-westend",
+	"cumulus/parachains/integration-tests/emulated/tests/people/people-rococo",
+	"cumulus/parachains/integration-tests/emulated/tests/people/people-westend",
 	"cumulus/parachains/pallets/collective-content",
 	"cumulus/parachains/pallets/parachain-info",
 	"cumulus/parachains/pallets/ping",
@@ -93,6 +97,8 @@ members = [
 	"cumulus/parachains/runtimes/coretime/coretime-rococo",
 	"cumulus/parachains/runtimes/coretime/coretime-westend",
 	"cumulus/parachains/runtimes/glutton/glutton-westend",
+	"cumulus/parachains/runtimes/people/people-rococo",
+	"cumulus/parachains/runtimes/people/people-westend",
 	"cumulus/parachains/runtimes/starters/seedling",
 	"cumulus/parachains/runtimes/starters/shell",
 	"cumulus/parachains/runtimes/test-utils",

cumulus/parachains/common/Cargo.toml

@@ -34,6 +34,7 @@ sp-runtime = { path = "../../../substrate/primitives/runtime", default-features
 sp-std = { path = "../../../substrate/primitives/std", default-features = false }
 
 # Polkadot
+pallet-xcm = { path = "../../../polkadot/xcm/pallet-xcm", default-features = false }
 rococo-runtime-constants = { path = "../../../polkadot/runtime/rococo/constants", default-features = false }
 westend-runtime-constants = { path = "../../../polkadot/runtime/westend/constants", default-features = false }
 polkadot-core-primitives = { path = "../../../polkadot/core-primitives", default-features = false }
@@ -70,6 +71,7 @@ std = [
 	"pallet-balances/std",
 	"pallet-collator-selection/std",
 	"pallet-message-queue/std",
+	"pallet-xcm/std",
 	"parachain-info/std",
 	"polkadot-core-primitives/std",
 	"polkadot-primitives/std",
@@ -95,6 +97,7 @@ runtime-benchmarks = [
 	"pallet-balances/runtime-benchmarks",
 	"pallet-collator-selection/runtime-benchmarks",
 	"pallet-message-queue/runtime-benchmarks",
+	"pallet-xcm/runtime-benchmarks",
 	"polkadot-primitives/runtime-benchmarks",
 	"sp-runtime/runtime-benchmarks",
 	"xcm-builder/runtime-benchmarks",

cumulus/parachains/common/src/impls.rs

@@ -18,12 +18,14 @@
 
 use frame_support::traits::{
 	fungibles::{self, Balanced, Credit},
-	Contains, ContainsPair, Currency, Get, Imbalance, OnUnbalanced,
+	Contains, ContainsPair, Currency, Get, Imbalance, OnUnbalanced, OriginTrait,
 };
 use pallet_asset_tx_payment::HandleCredit;
 use sp_runtime::traits::Zero;
-use sp_std::marker::PhantomData;
-use xcm::latest::{AssetId, Fungibility::Fungible, MultiAsset, MultiLocation};
+use sp_std::{marker::PhantomData, prelude::*};
+use xcm::latest::{
+	AssetId, Fungibility, Fungibility::Fungible, Junction, MultiAsset, MultiLocation, Parent,
+};
 
 /// Type alias to conveniently refer to the `Currency::NegativeImbalance` associated type.
 pub type NegativeImbalance<T> = <pallet_balances::Pallet<T> as Currency<
@@ -118,6 +120,55 @@ impl<T: Get<MultiLocation>> ContainsPair<MultiAsset, MultiLocation> for AssetsFr
 	}
 }
 
+/// Type alias to conveniently refer to the `Currency::Balance` associated type.
+pub type BalanceOf<T> =
+	<pallet_balances::Pallet<T> as Currency<<T as frame_system::Config>::AccountId>>::Balance;
+
+/// Implements `OnUnbalanced::on_unbalanced` to teleport slashed assets to relay chain treasury
+/// account.
+pub struct ToParentTreasury<TreasuryAccount, PalletAccount, T>(
+	PhantomData<(TreasuryAccount, PalletAccount, T)>,
+);
+
+impl<TreasuryAccount, PalletAccount, T> OnUnbalanced<NegativeImbalance<T>>
+	for ToParentTreasury<TreasuryAccount, PalletAccount, T>
+where
+	T: pallet_balances::Config + pallet_xcm::Config + frame_system::Config,
+	<<T as frame_system::Config>::RuntimeOrigin as OriginTrait>::AccountId: From<AccountIdOf<T>>,
+	[u8; 32]: From<<T as frame_system::Config>::AccountId>,
+	TreasuryAccount: Get<AccountIdOf<T>>,
+	PalletAccount: Get<AccountIdOf<T>>,
+	BalanceOf<T>: Into<Fungibility>,
+{
+	fn on_unbalanced(amount: NegativeImbalance<T>) {
+		let amount = match amount.drop_zero() {
+			Ok(..) => return,
+			Err(amount) => amount,
+		};
+		let imbalance = amount.peek();
+		let pallet_acc: AccountIdOf<T> = PalletAccount::get();
+		let treasury_acc: AccountIdOf<T> = TreasuryAccount::get();
+
+		<pallet_balances::Pallet<T>>::resolve_creating(&pallet_acc, amount);
+
+		let result = <pallet_xcm::Pallet<T>>::teleport_assets(
+			<<T as frame_system::Config>::RuntimeOrigin>::signed(pallet_acc.into()),
+			Box::new(Parent.into()),
+			Box::new(
+				Junction::AccountId32 { network: None, id: treasury_acc.into() }
+					.into_location()
+					.into(),
+			),
+			Box::new((Parent, imbalance).into()),
+			0,
+		);
+
+		if let Err(err) = result {
+			log::warn!("Failed to teleport slashed assets: {:?}", err);
+		}
+	}
+}
+
 #[cfg(test)]
 mod tests {
 	use super::*;