Make System Parachains trusted Teleporters (#1368)

Make System Parachain trusted Teleporters of each other.

Migration of https://github.com/paritytech/cumulus/pull/2842

---------

Co-authored-by: command-bot <>
Co-authored-by: joe petrowski <25483142+joepetrowski@users.noreply.github.com>

cumulus/parachains/integration-tests/emulated/common/src/lib.rs

@@ -15,6 +15,7 @@
 
 pub mod constants;
 pub mod impls;
+pub mod macros;
 pub mod xcm_helpers;
 
 use constants::{
@@ -22,16 +23,24 @@ use constants::{
 	asset_hub_rococo, asset_hub_westend, bridge_hub_rococo, penpal, rococo, westend,
 };
 use impls::{RococoWococoMessageHandler, WococoRococoMessageHandler};
+pub use paste;
 
 // Substrate
 use frame_support::traits::OnInitialize;
+pub use pallet_balances;
 
 // Cumulus
+pub use cumulus_pallet_xcmp_queue;
+pub use xcm_emulator::Chain;
 use xcm_emulator::{
 	decl_test_bridges, decl_test_networks, decl_test_parachains, decl_test_relay_chains,
 	decl_test_sender_receiver_accounts_parameter_types, DefaultMessageProcessor,
 };
 
+// Polkadot
+pub use pallet_xcm;
+pub use xcm::prelude::{AccountId32, WeightLimit};
+
 decl_test_relay_chains! {
 	#[api_version(8)]
 	pub struct Westend {
@@ -120,6 +129,7 @@ decl_test_parachains! {
 		pallets = {
 			PolkadotXcm: penpal_runtime::PolkadotXcm,
 			Assets: penpal_runtime::Assets,
+			Balances: penpal_runtime::Balances,
 		}
 	},
 	// Rococo Parachains
@@ -156,6 +166,7 @@ decl_test_parachains! {
 		pallets = {
 			PolkadotXcm: asset_hub_kusama_runtime::PolkadotXcm,
 			Assets: asset_hub_kusama_runtime::Assets,
+			Balances: asset_hub_kusama_runtime::Balances,
 		}
 	},
 	// Wococo Parachains
@@ -190,6 +201,7 @@ decl_test_parachains! {
 		pallets = {
 			PolkadotXcm: asset_hub_polkadot_runtime::PolkadotXcm,
 			Assets: asset_hub_polkadot_runtime::Assets,
+			Balances: asset_hub_polkadot_runtime::Balances,
 		}
 	},
 	pub struct PenpalRococoA {

cumulus/parachains/integration-tests/emulated/common/src/macros.rs

@@ -0,0 +1,102 @@
+// Copyright (C) Parity Technologies (UK) Ltd.
+// SPDX-License-Identifier: Apache-2.0
+
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 	http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#[macro_export]
+macro_rules! test_parachain_is_trusted_teleporter {
+	( $sender_para:ty, vec![$( $receiver_para:ty ),+], ($assets:expr, $amount:expr) ) => {
+		$crate::paste::paste! {
+			// init Origin variables
+			let sender = [<$sender_para Sender>]::get();
+			let mut para_sender_balance_before =
+				<$sender_para as $crate::Chain>::account_data_of(sender.clone()).free;
+			let origin = <$sender_para as $crate::Chain>::RuntimeOrigin::signed(sender.clone());
+			let fee_asset_item = 0;
+			let weight_limit = $crate::WeightLimit::Unlimited;
+
+			$(
+				{
+					// init Destination variables
+					let receiver = [<$receiver_para Receiver>]::get();
+					let para_receiver_balance_before =
+						<$receiver_para as $crate::Chain>::account_data_of(receiver.clone()).free;
+					let para_destination =
+						<$sender_para>::sibling_location_of(<$receiver_para>::para_id()).into();
+					let beneficiary =
+						$crate::AccountId32 { network: None, id: receiver.clone().into() }.into();
+
+					// Send XCM message from Origin Parachain
+					// We are only testing the limited teleport version, which should be ok since success will
+					// depend only on a proper `XcmConfig` at destination.
+					<$sender_para>::execute_with(|| {
+						assert_ok!(<$sender_para as [<$sender_para Pallet>]>::PolkadotXcm::limited_teleport_assets(
+							origin.clone(),
+							bx!(para_destination),
+							bx!(beneficiary),
+							bx!($assets.clone()),
+							fee_asset_item,
+							weight_limit.clone(),
+						));
+
+						type RuntimeEvent = <$sender_para as $crate::Chain>::RuntimeEvent;
+
+						assert_expected_events!(
+							$sender_para,
+							vec![
+								RuntimeEvent::PolkadotXcm(
+									$crate::pallet_xcm::Event::Attempted { outcome: Outcome::Complete { .. } }
+								) => {},
+								RuntimeEvent::XcmpQueue(
+									$crate::cumulus_pallet_xcmp_queue::Event::XcmpMessageSent { .. }
+								) => {},
+								RuntimeEvent::Balances(
+									$crate::pallet_balances::Event::Withdraw { who: sender, amount }
+								) => {},
+							]
+						);
+					});
+
+					// Receive XCM message in Destination Parachain
+					<$receiver_para>::execute_with(|| {
+						type RuntimeEvent = <$receiver_para as $crate::Chain>::RuntimeEvent;
+
+						assert_expected_events!(
+							$receiver_para,
+							vec![
+								RuntimeEvent::Balances(
+									$crate::pallet_balances::Event::Deposit { who: receiver, .. }
+								) => {},
+								RuntimeEvent::XcmpQueue(
+									$crate::cumulus_pallet_xcmp_queue::Event::Success { .. }
+								) => {},
+							]
+						);
+					});
+
+					// Check if balances are updated accordingly in Origin and Destination Parachains
+					let para_sender_balance_after =
+						<$sender_para as $crate::Chain>::account_data_of(sender.clone()).free;
+					let para_receiver_balance_after =
+						<$receiver_para as $crate::Chain>::account_data_of(receiver.clone()).free;
+
+					assert_eq!(para_sender_balance_before - $amount, para_sender_balance_after);
+					assert!(para_receiver_balance_after > para_receiver_balance_before);
+
+					// Update sender balance
+					para_sender_balance_before = <$sender_para as $crate::Chain>::account_data_of(sender.clone()).free;
+				}
+			)+
+		}
+	};
+}

cumulus/parachains/integration-tests/emulated/common/src/xcm_helpers.rs

@@ -1,18 +1,17 @@
-// Copyright Parity Technologies (UK) Ltd.
-// This file is part of Cumulus.
+// Copyright (C) Parity Technologies (UK) Ltd.
+// SPDX-License-Identifier: Apache-2.0
 
-// Cumulus is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Cumulus is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Cumulus.  If not, see <http://www.gnu.org/licenses/>.
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 	http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
 
 use parachains_common::AccountId;
 use xcm::{