mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
synced 2026-04-27 03:27:58 +00:00
Cecile Tonglet
67 lines
2.2 KiB
Rust
67 lines
2.2 KiB
Rust
// This file is part of Substrate.
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// Copyright (C) 2017-2020 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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/// A `Database` adapter for parity-db.
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use sp_database::{Database, Change, ColumnId, Transaction, error::DatabaseError};
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use crate::utils::NUM_COLUMNS;
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use crate::columns;
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struct DbAdapter(parity_db::Db);
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fn handle_err<T>(result: parity_db::Result<T>) -> T {
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match result {
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Ok(r) => r,
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Err(e) => {
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panic!("Critical database error: {:?}", e);
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}
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}
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}
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/// Wrap RocksDb database into a trait object that implements `sp_database::Database`
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pub fn open<H: Clone>(path: &std::path::Path) -> parity_db::Result<std::sync::Arc<dyn Database<H>>> {
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let mut config = parity_db::Options::with_columns(path, NUM_COLUMNS as u8);
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let mut state_col = &mut config.columns[columns::STATE as usize];
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state_col.ref_counted = true;
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state_col.preimage = true;
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state_col.uniform = true;
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let db = parity_db::Db::open(&config)?;
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Ok(std::sync::Arc::new(DbAdapter(db)))
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}
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impl<H: Clone> Database<H> for DbAdapter {
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fn commit(&self, transaction: Transaction<H>) -> Result<(), DatabaseError> {
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handle_err(self.0.commit(transaction.0.into_iter().map(|change|
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match change {
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Change::Set(col, key, value) => (col as u8, key, Some(value)),
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Change::Remove(col, key) => (col as u8, key, None),
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_ => unimplemented!(),
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}))
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);
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Ok(())
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}
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fn get(&self, col: ColumnId, key: &[u8]) -> Option<Vec<u8>> {
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handle_err(self.0.get(col as u8, key))
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}
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fn lookup(&self, _hash: &H) -> Option<Vec<u8>> {
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unimplemented!();
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}
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}
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