mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
synced 2026-07-01 04:17:24 +00:00
Bastian Köcher
e3e651f72c
* Happy new year Updates the copyright years and fixes wrong license headers. * Fix the template * Split HEADER into HEADER-APACHE & HEADER-GPL
39 lines
1.3 KiB
Rust
39 lines
1.3 KiB
Rust
// This file is part of Substrate.
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// Copyright (C) 2019-2021 Parity Technologies (UK) Ltd.
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// SPDX-License-Identifier: Apache-2.0
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//! Shared logic between on-chain and off-chain components used for slashing using an off-chain
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//! worker.
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use super::SessionIndex;
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use sp_std::prelude::*;
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use codec::Encode;
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pub(super) const PREFIX: &[u8] = b"session_historical";
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pub(super) const LAST_PRUNE: &[u8] = b"session_historical_last_prune";
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/// Derive the key used to store the list of validators
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pub(super) fn derive_key<P: AsRef<[u8]>>(prefix: P, session_index: SessionIndex) -> Vec<u8> {
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let prefix: &[u8] = prefix.as_ref();
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session_index.using_encoded(|encoded_session_index| {
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prefix.into_iter()
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.chain(b"/".into_iter())
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.chain(encoded_session_index.into_iter())
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.copied()
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.collect::<Vec<u8>>()
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})
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} |