sp_npos_elections/traits.rs
1// This file is part of Substrate.
2
3// Copyright (C) Parity Technologies (UK) Ltd.
4// SPDX-License-Identifier: Apache-2.0
5
6// Licensed under the Apache License, Version 2.0 (the "License");
7// you may not use this file except in compliance with the License.
8// You may obtain a copy of the License at
9//
10// http://www.apache.org/licenses/LICENSE-2.0
11//
12// Unless required by applicable law or agreed to in writing, software
13// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14// distributed under the License is distributed on an "AS IS" BASIS,
15// See the License for the specific language governing permissions and
16// limitations under the License.
17
18//! Traits for the npos-election operations.
19
20use crate::ExtendedBalance;
21use core::{fmt::Debug, ops::Mul};
22use sp_arithmetic::PerThing;
23
24/// an aggregator trait for a generic type of a voter/target identifier. This usually maps to
25/// substrate's account id.
26pub trait IdentifierT: Clone + Eq + Ord + Debug + codec::Codec {}
27impl<T: Clone + Eq + Ord + Debug + codec::Codec> IdentifierT for T {}
28
29/// Aggregator trait for a PerThing that can be multiplied by u128 (ExtendedBalance).
30pub trait PerThing128: PerThing + Mul<ExtendedBalance, Output = ExtendedBalance> {}
31impl<T: PerThing + Mul<ExtendedBalance, Output = ExtendedBalance>> PerThing128 for T {}