Contracts Add new version for marking new stable API

substrate/frame/contracts/src/lib.rs

@@ -223,7 +223,7 @@ pub mod pallet {
 	use sp_runtime::Perbill;
 
 	/// The current storage version.
-	pub(crate) const STORAGE_VERSION: StorageVersion = StorageVersion::new(15);
+	pub(crate) const STORAGE_VERSION: StorageVersion = StorageVersion::new(16);
 
 	#[pallet::pallet]
 	#[pallet::storage_version(STORAGE_VERSION)]

substrate/frame/contracts/src/migration.rs

@@ -64,6 +64,7 @@ pub mod v12;
 pub mod v13;
 pub mod v14;
 pub mod v15;
+pub mod v16;
 include!(concat!(env!("OUT_DIR"), "/migration_codegen.rs"));
 
 use crate::{weights::WeightInfo, Config, Error, MigrationInProgress, Pallet, Weight, LOG_TARGET};

substrate/frame/contracts/src/migration/v16.rs

@@ -0,0 +1,23 @@
+// 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.
+
+//! Version 16 does not have any storage update. Instead, it serves as an indicator for the
+//! stabilization of the following APIs: `call_v2`, `instantiate_v2`, `lock_delegate_dependency`,
+//! and `unlock_delegate_dependency`.
+
+const VERSION: u16 = 16;
+pub type Migration = crate::NoopMigration<VERSION>;