openethereum/ethcore/src/client/bad_blocks.rs

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// Copyright 2015-2018 Parity Technologies (UK) Ltd.
// This file is part of Parity.
// Parity 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.
// Parity 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 Parity. If not, see <http://www.gnu.org/licenses/>.
//! Stores recently seen bad blocks.
use bytes::{Bytes, ToPretty};
use ethereum_types::H256;
use itertools::Itertools;
use memory_cache::MemoryLruCache;
use parking_lot::RwLock;
use verification::queue::kind::blocks::Unverified;
/// Recently seen bad blocks.
pub struct BadBlocks {
last_blocks: RwLock<MemoryLruCache<H256, (Unverified, String)>>,
}
impl Default for BadBlocks {
fn default() -> Self {
BadBlocks {
last_blocks: RwLock::new(MemoryLruCache::new(8 * 1024 * 1024)),
}
}
}
impl BadBlocks {
/// Reports given RLP as invalid block.
pub fn report(&self, raw: Bytes, message: String) {
match Unverified::from_rlp(raw) {
Ok(unverified) => {
error!(
target: "client",
"\nBad block detected: {}\nRLP: {}\nHeader: {:?}\nUncles: {}\nTransactions:{}\n",
message,
unverified.bytes.to_hex(),
unverified.header,
unverified.uncles
.iter()
.enumerate()
.map(|(index, uncle)| format!("[Uncle {}] {:?}", index, uncle))
.join("\n"),
unverified.transactions
.iter()
.enumerate()
.map(|(index, tx)| format!("[Tx {}] {:?}", index, tx))
.join("\n"),
);
self.last_blocks.write().insert(unverified.header.hash(), (unverified, message));
},
Err(err) => {
error!(target: "client", "Bad undecodable block detected: {}\n{:?}", message, err);
},
}
}
/// Returns a list of recently detected bad blocks with error descriptions.
pub fn bad_blocks(&self) -> Vec<(Unverified, String)> {
self.last_blocks.read()
.backstore()
.iter()
.map(|(_k, (unverified, message))| (
Unverified::from_rlp(unverified.bytes.clone())
.expect("Bytes coming from UnverifiedBlock so decodable; qed"),
message.clone(),
))
.collect()
}
}