mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
synced 2026-06-13 00:01:09 +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
46 lines
1.4 KiB
Rust
46 lines
1.4 KiB
Rust
// This file is part of Substrate.
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// Copyright (C) 2017-2021 Parity Technologies (UK) Ltd.
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// SPDX-License-Identifier: GPL-3.0-or-later WITH Classpath-exception-2.0
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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use crate::error::Error;
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use log::info;
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use sp_runtime::traits::{Block as BlockT, NumberFor, Zero};
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use sc_client_api::{Backend, UsageProvider};
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use std::sync::Arc;
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/// Performs a revert of `blocks` blocks.
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pub fn revert_chain<B, BA, C>(
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client: Arc<C>,
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backend: Arc<BA>,
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blocks: NumberFor<B>
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) -> Result<(), Error>
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where
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B: BlockT,
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C: UsageProvider<B>,
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BA: Backend<B>,
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{
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let reverted = backend.revert(blocks, false)?;
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let info = client.usage_info().chain;
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if reverted.0.is_zero() {
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info!("There aren't any non-finalized blocks to revert.");
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} else {
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info!("Reverted {} blocks. Best: #{} ({})", reverted.0, info.best_number, info.best_hash);
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}
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Ok(())
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}
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