Remark storage (#10698)

* Remark storage

* Fixed benches

* Update frame/remark/src/lib.rs

Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>

* Fixed build

* Fixed build

Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>

substrate/frame/remark/src/benchmarking.rs

@@ -0,0 +1,47 @@
+// This file is part of Substrate.
+
+// Copyright (C) 2021-2022 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.
+
+//! Benchmarks for remarks pallet
+
+#![cfg(feature = "runtime-benchmarks")]
+
+use super::*;
+use frame_benchmarking::{benchmarks, whitelisted_caller};
+use frame_system::{EventRecord, Pallet as System, RawOrigin};
+use sp_std::*;
+
+#[cfg(test)]
+use crate::Pallet as Remark;
+
+fn assert_last_event<T: Config>(generic_event: <T as Config>::Event) {
+	let events = System::<T>::events();
+	let system_event: <T as frame_system::Config>::Event = generic_event.into();
+	let EventRecord { event, .. } = &events[events.len() - 1];
+	assert_eq!(event, &system_event);
+}
+
+benchmarks! {
+	store {
+		let l in 1 .. 1024*1024;
+		let caller: T::AccountId = whitelisted_caller();
+	}: _(RawOrigin::Signed(caller.clone()), vec![0u8; l as usize])
+	verify {
+		assert_last_event::<T>(Event::Stored { sender: caller, content_hash: sp_io::hashing::blake2_256(&vec![0u8; l as usize]).into() }.into());
+	}
+
+	impl_benchmark_test_suite!(Remark, crate::mock::new_test_ext(), crate::mock::Test);
+}