Allow to use evm foreign assets to pay XCM fees

Cargo.toml

@@ -19,6 +19,7 @@ members = [
 	"pallets/precompile-benchmarks",
 	"pallets/proxy-genesis-companion",
 	"pallets/xcm-transactor",
+	"pallets/xcm-weight-trader",
 	"precompiles/balances-erc20",
 	"precompiles/batch",
 	"precompiles/call-permit",
@@ -107,6 +108,7 @@ pallet-parachain-staking = { path = "pallets/parachain-staking", default-feature
 pallet-precompile-benchmarks = { path = "pallets/precompile-benchmarks", default-features = false }
 pallet-proxy-genesis-companion = { path = "pallets/proxy-genesis-companion", default-features = false }
 pallet-xcm-transactor = { path = "pallets/xcm-transactor", default-features = false }
+pallet-xcm-weight-trader = { path = "pallets/xcm-weight-trader", default-features = false }
 precompile-foreign-asset-migrator = { path = "precompiles/foreign-asset-migrator", default-features = false }
 xcm-primitives = { path = "primitives/xcm", default-features = false }
 
@@ -184,6 +186,7 @@ sp-runtime-interface = { git = "https://github.com/moonbeam-foundation/polkadot-
 sp-session = { git = "https://github.com/moonbeam-foundation/polkadot-sdk", branch = "moonbeam-polkadot-v1.11.0", default-features = false }
 sp-std = { git = "https://github.com/moonbeam-foundation/polkadot-sdk", branch = "moonbeam-polkadot-v1.11.0", default-features = false }
 sp-state-machine = { git = "https://github.com/moonbeam-foundation/polkadot-sdk", branch = "moonbeam-polkadot-v1.11.0", default-features = false }
+sp-tracing = { git = "https://github.com/moonbeam-foundation/polkadot-sdk", branch = "moonbeam-polkadot-v1.11.0", default-features = false }
 sp-transaction-pool = { git = "https://github.com/moonbeam-foundation/polkadot-sdk", branch = "moonbeam-polkadot-v1.11.0", default-features = false }
 sp-trie = { git = "https://github.com/moonbeam-foundation/polkadot-sdk", branch = "moonbeam-polkadot-v1.11.0", default-features = false }
 sp-version = { git = "https://github.com/moonbeam-foundation/polkadot-sdk", branch = "moonbeam-polkadot-v1.11.0", default-features = false }

pallets/xcm-weight-trader/Cargo.toml

@@ -0,0 +1,52 @@
+[package]
+authors = {workspace = true}
+description = "A pallet to trade weight for XCM execution"
+edition = "2021"
+name = "pallet-xcm-weight-trader"
+version = "0.1.0"
+
+[dependencies]
+log = {workspace = true}
+
+# Substrate
+frame-support = {workspace = true}
+frame-system = {workspace = true}
+pallet-balances = {workspace = true}
+parity-scale-codec = {workspace = true}
+scale-info = {workspace = true, features = ["derive"]}
+sp-core = {workspace = true}
+sp-io = {workspace = true}
+sp-runtime = {workspace = true}
+sp-std = {workspace = true}
+
+# Polkadot
+xcm = { workspace = true }
+xcm-executor = { workspace = true }
+
+# Benchmarks
+frame-benchmarking = {workspace = true, optional = true}
+
+[dev-dependencies]
+frame-benchmarking = {workspace = true, features = ["std"]}
+pallet-balances = {workspace = true, features = ["std", "insecure_zero_ed"]}
+sp-tracing = {workspace = true, features = ["std"] }
+
+[features]
+default = ["std"]
+runtime-benchmarks = [
+  "frame-benchmarking",
+  "frame-system/runtime-benchmarks"
+]
+std = [
+  "frame-support/std",
+  "frame-system/std",
+  "pallet-balances/std",
+  "scale-info/std",
+  "sp-core/std",
+  "sp-io/std",
+  "sp-runtime/std",
+  "sp-std/std",
+	"xcm/std",
+  "xcm-executor/std"
+]
+try-runtime = ["frame-support/try-runtime"]

pallets/xcm-weight-trader/src/benchmarking.rs

@@ -0,0 +1,139 @@
+// Copyright 2024 Moonbeam foundation
+// This file is part of Moonbeam.
+
+// Moonbeam 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.
+
+// Moonbeam 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 Moonbeam.  If not, see <http://www.gnu.org/licenses/>.
+
+#![cfg(feature = "runtime-benchmarks")]
+
+use super::*;
+
+use frame_benchmarking::{v2::*, BenchmarkError};
+use frame_support::traits::EnsureOrigin;
+use frame_system::EventRecord;
+
+fn assert_last_event<T: Config>(generic_event: <T as Config>::RuntimeEvent) {
+	let events = frame_system::Pallet::<T>::events();
+	let system_event: <T as frame_system::Config>::RuntimeEvent = generic_event.into();
+	// compare to the last event record
+	let EventRecord { event, .. } = &events[events.len() - 1];
+	assert_eq!(event, &system_event);
+}
+
+fn setup_one_asset<T: Config>() -> Result<Location, BenchmarkError> {
+	let origin = T::AddSupportedAssetOrigin::try_successful_origin()
+		.map_err(|_| BenchmarkError::Weightless)?;
+
+	let location = T::NotFilteredLocation::get();
+
+	Pallet::<T>::add_asset(origin, location.clone(), 1_000).expect("fail to setup asset");
+
+	Ok(location)
+}
+
+#[benchmarks]
+mod benchmarks {
+	use super::*;
+
+	#[benchmark]
+	fn add_asset() -> Result<(), BenchmarkError> {
+		let origin = T::AddSupportedAssetOrigin::try_successful_origin()
+			.map_err(|_| BenchmarkError::Weightless)?;
+
+		let location = T::NotFilteredLocation::get();
+
+		#[extrinsic_call]
+		_(origin as T::RuntimeOrigin, location.clone(), 1_000);
+
+		assert_last_event::<T>(
+			Event::SupportedAssetAdded {
+				location,
+				units_for_one_billion_native: 1_000,
+			}
+			.into(),
+		);
+		Ok(())
+	}
+
+	#[benchmark]
+	fn edit_asset() -> Result<(), BenchmarkError> {
+		// Setup one asset
+		let location = setup_one_asset::<T>()?;
+
+		let origin = T::EditSupportedAssetOrigin::try_successful_origin()
+			.map_err(|_| BenchmarkError::Weightless)?;
+
+		#[extrinsic_call]
+		_(origin as T::RuntimeOrigin, location.clone(), 2_000);
+
+		assert_last_event::<T>(
+			Event::SupportedAssetEdited {
+				location,
+				units_for_one_billion_native: 2_000,
+			}
+			.into(),
+		);
+		Ok(())
+	}
+
+	#[benchmark]
+	fn resume_asset_support() -> Result<(), BenchmarkError> {
+		// Setup one asset
+		let location = setup_one_asset::<T>()?;
+		let pause_origin = T::PauseSupportedAssetOrigin::try_successful_origin()
+			.map_err(|_| BenchmarkError::Weightless)?;
+		Pallet::<T>::pause_asset_support(pause_origin, location.clone())
+			.expect("fail to pause asset");
+
+		let origin = T::ResumeSupportedAssetOrigin::try_successful_origin()
+			.map_err(|_| BenchmarkError::Weightless)?;
+
+		#[extrinsic_call]
+		_(origin as T::RuntimeOrigin, location.clone());
+
+		assert_last_event::<T>(Event::ResumeAssetSupport { location }.into());
+		Ok(())
+	}
+
+	#[benchmark]
+	fn pause_asset_support() -> Result<(), BenchmarkError> {
+		// Setup one asset
+		let location = setup_one_asset::<T>()?;
+
+		let origin = T::PauseSupportedAssetOrigin::try_successful_origin()
+			.map_err(|_| BenchmarkError::Weightless)?;
+
+		#[extrinsic_call]
+		_(origin as T::RuntimeOrigin, location.clone());
+
+		assert_last_event::<T>(Event::PauseAssetSupport { location }.into());
+		Ok(())
+	}
+
+	#[benchmark]
+	fn remove_asset() -> Result<(), BenchmarkError> {
+		// Setup one asset
+		let location = setup_one_asset::<T>()?;
+
+		let origin = T::RemoveSupportedAssetOrigin::try_successful_origin()
+			.map_err(|_| BenchmarkError::Weightless)?;
+
+		#[extrinsic_call]
+		_(origin as T::RuntimeOrigin, location.clone());
+
+		assert_last_event::<T>(Event::SupportedAssetRemoved { location }.into());
+		Ok(())
+	}
+
+	impl_benchmark_test_suite!(Pallet, crate::mock::new_test_ext(), crate::mock::Test,);
+}