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// Copyright 2019-2020 Parity Technologies (UK) Ltd. // This file is part of Substrate. // Substrate is free software: you can redistribute it and/or modify // it under the terms of the GNU General Public License as published by // the Free Software Foundation, either version 3 of the License, or // (at your option) any later version. // Substrate is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // You should have received a copy of the GNU General Public License // along with Substrate. If not, see <http://www.gnu.org/licenses/>. //! 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)] sp_api::decl_runtime_apis! { /// The API to query account nonce (aka transaction index). pub trait AccountNonceApi<AccountId, Index> where AccountId: codec::Codec, Index: codec::Codec, { /// Get current account nonce of given `AccountId`. fn account_nonce(account: AccountId) -> Index; } }