feat: initialize Kurdistan SDK - independent fork of Polkadot SDK

substrate/frame/staking-async/runtime-api/src/lib.rs

@@ -0,0 +1,39 @@
+// 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 for the staking pallet.
+
+#![cfg_attr(not(feature = "std"), no_std)]
+
+use codec::Codec;
+
+sp_api::decl_runtime_apis! {
+	pub trait StakingApi<Balance, AccountId>
+		where
+			Balance: Codec,
+			AccountId: Codec,
+	{
+		/// Returns the nominations quota for a nominator with a given balance.
+		fn nominations_quota(balance: Balance) -> u32;
+
+		/// Returns the page count of exposures for a validator `account` in a given era.
+		fn eras_stakers_page_count(era: sp_staking::EraIndex, account: AccountId) -> sp_staking::Page;
+
+		/// Returns true if validator `account` has pages to be claimed for the given era.
+		fn pending_rewards(era: sp_staking::EraIndex, account: AccountId) -> bool;
+	}
+}