// This file is part of Substrate.
// Copyright (C) Parity Technologies (UK) Ltd.
// SPDX-License-Identifier: GPL-3.0-or-later WITH Classpath-exception-2.0
// 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/>.
use crate::{CliConfiguration, DatabaseParams, PruningParams, Result as CliResult, SharedParams};
use codec::{Decode, Encode};
use sc_client_api::{backend::Backend as BackendT, blockchain::HeaderBackend};
use sp_blockchain::Info;
use sp_runtime::traits::{Block as BlockT, Header as HeaderT};
use std::{fmt::Debug, io};
/// The `chain-info` subcommand used to output db meta columns information.
#[derive(Debug, Clone, clap::Parser)]
pub struct ChainInfoCmd {
#[allow(missing_docs)]
#[clap(flatten)]
pub pruning_params: PruningParams,
#[allow(missing_docs)]
#[clap(flatten)]
pub shared_params: SharedParams,
#[allow(missing_docs)]
#[clap(flatten)]
pub database_params: DatabaseParams,
}
/// Serializable `chain-info` subcommand output.
#[derive(Clone, Eq, PartialEq, Debug, Encode, Decode, serde::Serialize)]
struct ChainInfo<B: BlockT> {
/// Best block hash.
best_hash: B::Hash,
/// Best block number.
best_number: <<B as BlockT>::Header as HeaderT>::Number,
/// Genesis block hash.
genesis_hash: B::Hash,
/// The head of the finalized chain.
finalized_hash: B::Hash,
/// Last finalized block number.
finalized_number: <<B as BlockT>::Header as HeaderT>::Number,
}
impl<B: BlockT> From<Info<B>> for ChainInfo<B> {
fn from(info: Info<B>) -> Self {
ChainInfo::<B> {
best_hash: info.best_hash,
best_number: info.best_number,
genesis_hash: info.genesis_hash,
finalized_hash: info.finalized_hash,
finalized_number: info.finalized_number,
}
}
}
impl ChainInfoCmd {
/// Run the `chain-info` subcommand
pub fn run<B>(&self, config: &sc_service::Configuration) -> CliResult<()>
where
B: BlockT,
{
let db_config = sc_client_db::DatabaseSettings {
trie_cache_maximum_size: config.trie_cache_maximum_size,
state_pruning: config.state_pruning.clone(),
source: config.database.clone(),
blocks_pruning: config.blocks_pruning,
};
let backend = sc_service::new_db_backend::<B>(db_config)?;
let info: ChainInfo<B> = backend.blockchain().info().into();
let mut out = io::stdout();
serde_json::to_writer_pretty(&mut out, &info)
.map_err(|e| format!("Error writing JSON: {}", e))?;
Ok(())
}
}
impl CliConfiguration for ChainInfoCmd {
fn shared_params(&self) -> &SharedParams {
&self.shared_params
}
fn pruning_params(&self) -> Option<&PruningParams> {
Some(&self.pruning_params)
}
fn database_params(&self) -> Option<&DatabaseParams> {
Some(&self.database_params)
}
}