1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66

// SPDX-License-Identifier: GPL-3.0-or-later WITH Classpath-exception-2.0
// This file is part of Frontier.
//
// Copyright (c) 2022 Parity Technologies (UK) Ltd.
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.

// Substrate
use sp_database::{error::DatabaseError, Change, ColumnId, Database, Transaction};

fn handle_err<T>(result: parity_db::Result<T>) -> T {
	match result {
		Ok(r) => r,
		Err(e) => {
			panic!("Critical database error: {:?}", e);
		}
	}
}

pub struct DbAdapter(pub parity_db::Db);

impl<H: Clone + AsRef<[u8]>> Database<H> for DbAdapter {
	fn commit(&self, transaction: Transaction<H>) -> Result<(), DatabaseError> {
		handle_err(
			self.0
				.commit(transaction.0.into_iter().map(|change| match change {
					Change::Set(col, key, value) => (col as u8, key, Some(value)),
					Change::Remove(col, key) => (col as u8, key, None),
					_ => unimplemented!(),
				})),
		);

		Ok(())
	}

	fn get(&self, col: ColumnId, key: &[u8]) -> Option<Vec<u8>> {
		handle_err(self.0.get(col as u8, key))
	}

	fn contains(&self, col: ColumnId, key: &[u8]) -> bool {
		handle_err(self.0.get_size(col as u8, key)).is_some()
	}

	fn value_size(&self, col: ColumnId, key: &[u8]) -> Option<usize> {
		handle_err(self.0.get_size(col as u8, key)).map(|s| s as usize)
	}

	fn supports_ref_counting(&self) -> bool {
		true
	}

	fn sanitize_key(&self, key: &mut Vec<u8>) {
		let _prefix = key.drain(0..key.len() - super::DB_HASH_LEN);
	}
}