feat: initialize Kurdistan SDK - independent fork of Polkadot SDK

substrate/frame/system/rpc/runtime-api/src/lib.rs

@@ -0,0 +1,36 @@
+// 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.
+
+//! Runtime API definition required by System RPC extensions.
+//!
+//! This API should be imported and implemented by the runtime,
+//! of a node that wants to use the custom RPC extension
+//! adding System access methods.
+
+#![cfg_attr(not(feature = "std"), no_std)]
+
+#[docify::export(AccountNonceApi)]
+sp_api::decl_runtime_apis! {
+	/// The API to query account nonce.
+	pub trait AccountNonceApi<AccountId, Nonce> where
+		AccountId: codec::Codec,
+		Nonce: codec::Codec,
+	{
+		/// Get current account nonce of given `AccountId`.
+		fn account_nonce(account: AccountId) -> Nonce;
+	}
+}