Add pallet-xcm patch with claim_assets extrinsic

chain-spec-generator/Cargo.toml

@@ -26,7 +26,7 @@ pallet-staking = "29.0.0"
 sc-consensus-grandpa = "0.20.0"
 sp-runtime = "32.0.0"
 sp-consensus-beefy = "14.0.0"
-xcm = { package = "staging-xcm", version = "8.0.0" }
+xcm = { package = "staging-xcm", version = "8.0.1" }
 parachains-common = { version = "8.0.0" }
 cumulus-primitives-core = { version = "0.8.0" }
 

integration-tests/emulated/helpers/Cargo.toml

@@ -15,8 +15,8 @@ pallet-balances = { version = "29.0.0" }
 pallet-message-queue = { version = "32.0.0" }
 
 # Polkadot
-xcm = { package = "staging-xcm", version = "8.0.0" }
-pallet-xcm = { version = "8.0.1" }
+xcm = { package = "staging-xcm", version = "8.0.1" }
+pallet-xcm = { version = "8.0.2" }
 
 # Cumulus
 xcm-emulator = { version = "0.6.0" }

integration-tests/emulated/helpers/src/lib.rs

@@ -21,7 +21,7 @@ pub use pallet_message_queue;
 
 // Polkadot
 pub use pallet_xcm;
-pub use xcm::prelude::{AccountId32, WeightLimit};
+pub use xcm::prelude::{AccountId32, VersionedAssets, Weight, WeightLimit};
 
 // Cumulus
 pub use asset_test_utils;
@@ -122,3 +122,101 @@ macro_rules! test_parachain_is_trusted_teleporter {
 		}
 	};
 }
+
+#[macro_export]
+macro_rules! test_chain_can_claim_assets {
+	( $sender_para:ty, $runtime_call:ty, $network_id:expr, $assets:expr, $amount:expr ) => {
+		$crate::paste::paste! {
+			let sender = [<$sender_para Sender>]::get();
+			let origin = <$sender_para as $crate::Chain>::RuntimeOrigin::signed(sender.clone());
+			// Receiver is the same as sender
+			let beneficiary: Location =
+				$crate::AccountId32 { network: Some($network_id), id: sender.clone().into() }.into();
+			let versioned_assets: $crate::VersionedAssets = $assets.clone().into();
+
+			<$sender_para>::execute_with(|| {
+				// Assets are trapped for whatever reason.
+				// The possible reasons for this might differ from runtime to runtime, so here we just drop them directly.
+				<$sender_para as [<$sender_para Pallet>]>::PolkadotXcm::drop_assets(
+					&beneficiary,
+					$assets.clone().into(),
+					&XcmContext { origin: None, message_id: [0u8; 32], topic: None },
+				);
+
+				type RuntimeEvent = <$sender_para as $crate::Chain>::RuntimeEvent;
+				assert_expected_events!(
+					$sender_para,
+					vec![
+						RuntimeEvent::PolkadotXcm(
+							$crate::pallet_xcm::Event::AssetsTrapped { origin: beneficiary, assets: versioned_assets, .. }
+						) => {},
+					]
+				);
+
+				let balance_before = <$sender_para as [<$sender_para Pallet>]>::Balances::free_balance(&sender);
+
+				// Different origin or different assets won't work.
+				let other_origin = <$sender_para as $crate::Chain>::RuntimeOrigin::signed([<$sender_para Receiver>]::get());
+				assert!(<$sender_para as [<$sender_para Pallet>]>::PolkadotXcm::claim_assets(
+					other_origin,
+					bx!(versioned_assets.clone().into()),
+					bx!(beneficiary.clone().into()),
+				).is_err());
+				let other_versioned_assets: $crate::VersionedAssets = Assets::new().into();
+				assert!(<$sender_para as [<$sender_para Pallet>]>::PolkadotXcm::claim_assets(
+					origin.clone(),
+					bx!(other_versioned_assets.into()),
+					bx!(beneficiary.clone().into()),
+				).is_err());
+
+				// Assets will be claimed to `beneficiary`, which is the same as `sender`.
+				assert_ok!(<$sender_para as [<$sender_para Pallet>]>::PolkadotXcm::claim_assets(
+					origin.clone(),
+					bx!(versioned_assets.clone().into()),
+					bx!(beneficiary.clone().into()),
+				));
+
+				assert_expected_events!(
+					$sender_para,
+					vec![
+						RuntimeEvent::PolkadotXcm(
+							$crate::pallet_xcm::Event::AssetsClaimed { origin: beneficiary, assets: versioned_assets, .. }
+						) => {},
+					]
+				);
+
+				// After claiming the assets, the balance has increased.
+				let balance_after = <$sender_para as [<$sender_para Pallet>]>::Balances::free_balance(&sender);
+				assert_eq!(balance_after, balance_before + $amount);
+
+				// Claiming the assets again doesn't work.
+				assert!(<$sender_para as [<$sender_para Pallet>]>::PolkadotXcm::claim_assets(
+					origin.clone(),
+					bx!(versioned_assets.clone().into()),
+					bx!(beneficiary.clone().into()),
+				).is_err());
+
+				let balance = <$sender_para as [<$sender_para Pallet>]>::Balances::free_balance(&sender);
+				assert_eq!(balance, balance_after);
+
+				// You can also claim assets and send them to a different account.
+				<$sender_para as [<$sender_para Pallet>]>::PolkadotXcm::drop_assets(
+					&beneficiary,
+					$assets.clone().into(),
+					&XcmContext { origin: None, message_id: [0u8; 32], topic: None },
+				);
+				let receiver = [<$sender_para Receiver>]::get();
+				let other_beneficiary: Location =
+					$crate::AccountId32 { network: Some($network_id), id: receiver.clone().into() }.into();
+				let balance_before = <$sender_para as [<$sender_para Pallet>]>::Balances::free_balance(&receiver);
+				assert_ok!(<$sender_para as [<$sender_para Pallet>]>::PolkadotXcm::claim_assets(
+					origin.clone(),
+					bx!(versioned_assets.clone().into()),
+					bx!(other_beneficiary.clone().into()),
+				));
+				let balance_after = <$sender_para as [<$sender_para Pallet>]>::Balances::free_balance(&receiver);
+				assert_eq!(balance_after, balance_before + $amount);
+			});
+		}
+	};
+}

integration-tests/emulated/tests/assets/asset-hub-kusama/Cargo.toml

@@ -20,9 +20,9 @@ pallet-asset-conversion = { version = "11.0.0" }
 pallet-message-queue = { version = "32.0.0" }
 
 # Polkadot
-xcm = { package = "staging-xcm", version = "8.0.0" }
+xcm = { package = "staging-xcm", version = "8.0.1" }
 xcm-executor = { package = "staging-xcm-executor", default-features = false, version = "8.0.1" }
-pallet-xcm = { version = "8.0.1" }
+pallet-xcm = { version = "8.0.2" }
 
 # Cumulus
 parachains-common = { version = "8.0.0" }

integration-tests/emulated/tests/assets/asset-hub-kusama/src/tests/claim_assets.rs

@@ -0,0 +1,30 @@
+// 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.
+
+//! Tests related to claiming assets trapped during XCM execution.
+
+use crate::*;
+
+use asset_hub_kusama_runtime::ExistentialDeposit;
+use integration_tests_helpers::test_chain_can_claim_assets;
+use xcm_executor::traits::DropAssets;
+
+#[test]
+fn assets_can_be_claimed() {
+	let amount = ExistentialDeposit::get();
+	let assets: Assets = (Parent, amount).into();
+
+	test_chain_can_claim_assets!(AssetHubKusama, RuntimeCall, NetworkId::Kusama, assets, amount);
+}

integration-tests/emulated/tests/assets/asset-hub-kusama/src/tests/mod.rs

@@ -13,6 +13,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+mod claim_assets;
 mod reserve_transfer;
 mod send;
 mod set_xcm_versions;

integration-tests/emulated/tests/assets/asset-hub-polkadot/Cargo.toml

@@ -21,8 +21,8 @@ pallet-message-queue = { version = "32.0.0" }
 
 # Polkadot
 polkadot-runtime-common = { version = "8.0.1" }
-xcm = { package = "staging-xcm", version = "8.0.0" }
-pallet-xcm = { version = "8.0.1" }
+xcm = { package = "staging-xcm", version = "8.0.1" }
+pallet-xcm = { version = "8.0.2" }
 xcm-executor = { package = "staging-xcm-executor", version = "8.0.1" }
 
 # Cumulus

integration-tests/emulated/tests/assets/asset-hub-polkadot/src/tests/claim_assets.rs

@@ -0,0 +1,36 @@
+// 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.
+
+//! Tests related to claiming assets trapped during XCM execution.
+
+use crate::*;
+
+use asset_hub_polkadot_runtime::ExistentialDeposit;
+use integration_tests_helpers::test_chain_can_claim_assets;
+use xcm_executor::traits::DropAssets;
+
+#[test]
+fn assets_can_be_claimed() {
+	let amount = ExistentialDeposit::get();
+	let assets: Assets = (Parent, amount).into();
+
+	test_chain_can_claim_assets!(
+		AssetHubPolkadot,
+		RuntimeCall,
+		NetworkId::Polkadot,
+		assets,
+		amount
+	);
+}

integration-tests/emulated/tests/assets/asset-hub-polkadot/src/tests/mod.rs

@@ -13,6 +13,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+mod claim_assets;
 mod fellowship_treasury;
 mod reserve_transfer;
 mod send;

integration-tests/emulated/tests/bridges/bridge-hub-kusama/Cargo.toml

@@ -17,8 +17,8 @@ pallet-assets = { version = "30.0.0" }
 pallet-message-queue = { version = "32.0.0" }
 
 # Polkadot
-xcm = { package = "staging-xcm", version = "8.0.0" }
-pallet-xcm = { version = "8.0.1" }
+xcm = { package = "staging-xcm", version = "8.0.1" }
+pallet-xcm = { version = "8.0.2" }
 xcm-executor = { package = "staging-xcm-executor", version = "8.0.1" }
 
 # Cumulus

integration-tests/emulated/tests/bridges/bridge-hub-kusama/src/tests/claim_assets.rs

@@ -0,0 +1,30 @@
+// 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.
+
+//! Tests related to claiming assets trapped during XCM execution.
+
+use crate::*;
+
+use bridge_hub_kusama_runtime::ExistentialDeposit;
+use integration_tests_helpers::test_chain_can_claim_assets;
+use xcm_executor::traits::DropAssets;
+
+#[test]
+fn assets_can_be_claimed() {
+	let amount = ExistentialDeposit::get();
+	let assets: Assets = (Parent, amount).into();
+
+	test_chain_can_claim_assets!(AssetHubKusama, RuntimeCall, NetworkId::Kusama, assets, amount);
+}

integration-tests/emulated/tests/bridges/bridge-hub-kusama/src/tests/mod.rs

@@ -16,6 +16,7 @@
 use crate::*;
 
 mod asset_transfers;
+mod claim_assets;
 mod send_xcm;
 mod teleport;
 

integration-tests/emulated/tests/bridges/bridge-hub-polkadot/Cargo.toml

@@ -17,8 +17,8 @@ pallet-assets = { version = "30.0.0" }
 pallet-message-queue = { version = "32.0.0" }
 
 # Polkadot
-xcm = { package = "staging-xcm", version = "8.0.0" }
-pallet-xcm = { version = "8.0.1" }
+xcm = { package = "staging-xcm", version = "8.0.1" }
+pallet-xcm = { version = "8.0.2" }
 xcm-executor = { package = "staging-xcm-executor", version = "8.0.1" }
 
 # Cumulus

integration-tests/emulated/tests/bridges/bridge-hub-polkadot/src/tests/claim_assets.rs

@@ -0,0 +1,36 @@
+// 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.
+
+//! Tests related to claiming assets trapped during XCM execution.
+
+use crate::*;
+
+use bridge_hub_polkadot_runtime::ExistentialDeposit;
+use integration_tests_helpers::test_chain_can_claim_assets;
+use xcm_executor::traits::DropAssets;
+
+#[test]
+fn assets_can_be_claimed() {
+	let amount = ExistentialDeposit::get();
+	let assets: Assets = (Parent, amount).into();
+
+	test_chain_can_claim_assets!(
+		AssetHubPolkadot,
+		RuntimeCall,
+		NetworkId::Polkadot,
+		assets,
+		amount
+	);
+}

integration-tests/emulated/tests/bridges/bridge-hub-polkadot/src/tests/mod.rs

@@ -16,6 +16,7 @@
 use crate::*;
 
 mod asset_transfers;
+mod claim_assets;
 mod send_xcm;
 mod teleport;
 

relay/kusama/Cargo.toml

@@ -81,7 +81,7 @@ pallet-treasury = { default-features = false , version = "28.0.0" }
 pallet-utility = { default-features = false , version = "29.0.0" }
 pallet-vesting = { default-features = false , version = "29.0.0" }
 pallet-whitelist = { default-features = false , version = "28.0.0" }
-pallet-xcm = { default-features = false , version = "8.0.1" }
+pallet-xcm = { default-features = false , version = "8.0.2" }
 pallet-xcm-benchmarks = { default-features = false, optional = true , version = "8.0.2" }
 frame-election-provider-support = { default-features = false , version = "29.0.0" }
 
@@ -98,7 +98,7 @@ runtime-common = { package = "polkadot-runtime-common", default-features = false
 runtime-parachains = { package = "polkadot-runtime-parachains", default-features = false , version = "8.0.1" }
 primitives = { package = "polkadot-primitives", default-features = false , version = "8.0.1" }
 
-xcm = { package = "staging-xcm", default-features = false , version = "8.0.0" }
+xcm = { package = "staging-xcm", default-features = false , version = "8.0.1" }
 xcm-executor = { package = "staging-xcm-executor", default-features = false , version = "8.0.1" }
 xcm-builder = { package = "staging-xcm-builder", default-features = false , version = "8.0.1" }
 

relay/kusama/src/lib.rs

@@ -2599,6 +2599,13 @@ sp_api::impl_runtime_apis! {
 						dest
 					)
 				}
+
+				fn get_asset() -> Asset {
+					Asset {
+						id: AssetId(Location::here()),
+						fun: Fungible(ExistentialDeposit::get()),
+					}
+				}
 			}
 
 			impl pallet_xcm_benchmarks::Config for Runtime {