fc_db/lib.rs
1// This file is part of Frontier.
2
3// Copyright (C) Parity Technologies (UK) Ltd.
4// SPDX-License-Identifier: GPL-3.0-or-later WITH Classpath-exception-2.0
5
6// This program is free software: you can redistribute it and/or modify
7// it under the terms of the GNU General Public License as published by
8// the Free Software Foundation, either version 3 of the License, or
9// (at your option) any later version.
10
11// This program is distributed in the hope that it will be useful,
12// but WITHOUT ANY WARRANTY; without even the implied warranty of
13// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14// GNU General Public License for more details.
15
16// You should have received a copy of the GNU General Public License
17// along with this program. If not, see <https://www.gnu.org/licenses/>.
18
19#![warn(unused_crate_dependencies)]
20
21use std::sync::Arc;
22
23// Substrate
24pub use sc_client_db::DatabaseSource;
25
26pub mod kv;
27#[cfg(feature = "sql")]
28pub mod sql;
29
30#[derive(Clone)]
31pub enum Backend<Block, C> {
32 KeyValue(Arc<kv::Backend<Block, C>>),
33 #[cfg(feature = "sql")]
34 Sql(Arc<sql::Backend<Block>>),
35}