feat: pallet asset-rate (#13608)

* poc

* fix: remove AssetIdParameter

* tests: add

* docs: add pallet description

* feat: add benches

* refactor: UnknownAssetId

* fix: normalize mock cfg

* fix: benchmarks

* chore: add weights

* refactor: remove storage getter

* chore: apply suggestions from code review

* docs: add native balance to calls

* chore: apply suggestions from code review

* chore: apply ConversionFromAssetBalance

* tests: update balance mock

* chore: apply suggestions from code review

* ci: set publish to false

* docs: fix missing rustdoc

---------

Co-authored-by: parity-processbot <>

substrate/frame/asset-rate/src/benchmarking.rs

@@ -0,0 +1,86 @@
+// This file is part of Substrate.
+
+// 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.
+
+//! The crate's benchmarks.
+
+use super::*;
+use crate::{pallet as pallet_asset_rate, Pallet as AssetRate};
+
+use frame_benchmarking::v2::*;
+use frame_support::assert_ok;
+use frame_system::RawOrigin;
+
+const ASSET_ID: u32 = 1;
+
+fn default_conversion_rate() -> FixedU128 {
+	FixedU128::from_u32(1u32)
+}
+
+#[benchmarks(where <T as Config>::AssetId: From<u32>)]
+mod benchmarks {
+	use super::*;
+
+	#[benchmark]
+	fn create() -> Result<(), BenchmarkError> {
+		let asset_id: T::AssetId = ASSET_ID.into();
+		#[extrinsic_call]
+		_(RawOrigin::Root, asset_id, default_conversion_rate());
+
+		assert_eq!(
+			pallet_asset_rate::ConversionRateToNative::<T>::get(asset_id),
+			Some(default_conversion_rate())
+		);
+		Ok(())
+	}
+
+	#[benchmark]
+	fn update() -> Result<(), BenchmarkError> {
+		let asset_id: T::AssetId = ASSET_ID.into();
+		assert_ok!(AssetRate::<T>::create(
+			RawOrigin::Root.into(),
+			asset_id,
+			default_conversion_rate()
+		));
+
+		#[extrinsic_call]
+		_(RawOrigin::Root, asset_id, FixedU128::from_u32(2));
+
+		assert_eq!(
+			pallet_asset_rate::ConversionRateToNative::<T>::get(asset_id),
+			Some(FixedU128::from_u32(2))
+		);
+		Ok(())
+	}
+
+	#[benchmark]
+	fn remove() -> Result<(), BenchmarkError> {
+		let asset_id: T::AssetId = ASSET_ID.into();
+		assert_ok!(AssetRate::<T>::create(
+			RawOrigin::Root.into(),
+			ASSET_ID.into(),
+			default_conversion_rate()
+		));
+
+		#[extrinsic_call]
+		_(RawOrigin::Root, asset_id);
+
+		assert!(pallet_asset_rate::ConversionRateToNative::<T>::get(asset_id).is_none());
+		Ok(())
+	}
+
+	impl_benchmark_test_suite! { AssetRate, crate::mock::new_test_ext(), crate::mock::Test }
+}