mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
synced 2026-04-26 11:07:56 +00:00
Dmitry Markin
106 lines
3.5 KiB
Rust
106 lines
3.5 KiB
Rust
// This file is part of Substrate.
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// Copyright (C) 2019-2022 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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//! Schema for BEEFY state persisted in the aux-db.
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use crate::worker::PersistedState;
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use codec::{Decode, Encode};
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use log::{info, trace};
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use sc_client_api::{backend::AuxStore, Backend};
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use sp_blockchain::{Error as ClientError, Result as ClientResult};
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use sp_runtime::traits::Block as BlockT;
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const VERSION_KEY: &[u8] = b"beefy_auxschema_version";
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const WORKER_STATE: &[u8] = b"beefy_voter_state";
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const CURRENT_VERSION: u32 = 1;
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pub(crate) fn write_current_version<B: AuxStore>(backend: &B) -> ClientResult<()> {
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info!(target: "beefy", "🥩 write aux schema version {:?}", CURRENT_VERSION);
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AuxStore::insert_aux(backend, &[(VERSION_KEY, CURRENT_VERSION.encode().as_slice())], &[])
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}
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/// Write voter state.
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pub(crate) fn write_voter_state<Block: BlockT, B: AuxStore>(
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backend: &B,
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state: &PersistedState<Block>,
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) -> ClientResult<()> {
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trace!(target: "beefy", "🥩 persisting {:?}", state);
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backend.insert_aux(&[(WORKER_STATE, state.encode().as_slice())], &[])
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}
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fn load_decode<B: AuxStore, T: Decode>(backend: &B, key: &[u8]) -> ClientResult<Option<T>> {
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match backend.get_aux(key)? {
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None => Ok(None),
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Some(t) => T::decode(&mut &t[..])
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.map_err(|e| ClientError::Backend(format!("BEEFY DB is corrupted: {}", e)))
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.map(Some),
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}
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}
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/// Load or initialize persistent data from backend.
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pub(crate) fn load_persistent<B, BE>(backend: &BE) -> ClientResult<Option<PersistedState<B>>>
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where
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B: BlockT,
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BE: Backend<B>,
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{
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let version: Option<u32> = load_decode(backend, VERSION_KEY)?;
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match version {
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None => (),
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Some(1) => return load_decode::<_, PersistedState<B>>(backend, WORKER_STATE),
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other =>
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return Err(ClientError::Backend(format!("Unsupported BEEFY DB version: {:?}", other))),
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}
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// No persistent state found in DB.
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Ok(None)
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}
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#[cfg(test)]
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pub(crate) mod tests {
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use super::*;
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use crate::tests::BeefyTestNet;
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use sc_network_test::TestNetFactory;
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// also used in tests.rs
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pub fn verify_persisted_version<B: BlockT, BE: Backend<B>>(backend: &BE) -> bool {
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let version: u32 = load_decode(backend, VERSION_KEY).unwrap().unwrap();
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version == CURRENT_VERSION
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}
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#[tokio::test]
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async fn should_load_persistent_sanity_checks() {
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let mut net = BeefyTestNet::new(1);
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let backend = net.peer(0).client().as_backend();
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// version not available in db -> None
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assert_eq!(load_persistent(&*backend).unwrap(), None);
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// populate version in db
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write_current_version(&*backend).unwrap();
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// verify correct version is retrieved
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assert_eq!(load_decode(&*backend, VERSION_KEY).unwrap(), Some(CURRENT_VERSION));
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// version is available in db but state isn't -> None
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assert_eq!(load_persistent(&*backend).unwrap(), None);
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// full `PersistedState` load is tested in `tests.rs`.
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}
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}
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