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// This file is part of Substrate.
// Copyright (C) 2019-2022 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.
//! Runtime Api to help discover authorities.
#![cfg_attr(not(feature = "std"), no_std)]
use sp_std::vec::Vec;
mod app {
use sp_application_crypto::{app_crypto, key_types::AUTHORITY_DISCOVERY, sr25519};
app_crypto!(sr25519, AUTHORITY_DISCOVERY);
}
sp_application_crypto::with_pair! {
/// An authority discovery authority keypair.
pub type AuthorityPair = app::Pair;
}
/// An authority discovery authority identifier.
pub type AuthorityId = app::Public;
/// An authority discovery authority signature.
pub type AuthoritySignature = app::Signature;
sp_api::decl_runtime_apis! {
/// The authority discovery api.
///
/// This api is used by the `client/authority-discovery` module to retrieve identifiers
/// of the current and next authority set.
pub trait AuthorityDiscoveryApi {
/// Retrieve authority identifiers of the current and next authority set.
fn authorities() -> Vec<AuthorityId>;
}
}