openethereum/ethcore/src/blockchain/extras.rs

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// Copyright 2015-2017 Parity Technologies (UK) Ltd.
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// 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/>.
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//! Blockchain DB extras.
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use std::ops;
use std::io::Write;
use bloomchain;
use blooms::{GroupPosition, BloomGroup};
use db::Key;
use engines::epoch::{Transition as EpochTransition};
use header::BlockNumber;
use receipt::Receipt;
use heapsize::HeapSizeOf;
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use bigint::prelude::U256;
use bigint::hash::{H256, H264};
use kvdb::PREFIX_LEN as DB_PREFIX_LEN;
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/// Represents index of extra data in database
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#[derive(Copy, Debug, Hash, Eq, PartialEq, Clone)]
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pub enum ExtrasIndex {
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/// Block details index
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BlockDetails = 0,
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/// Block hash index
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BlockHash = 1,
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/// Transaction address index
TransactionAddress = 2,
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/// Block blooms index
BlocksBlooms = 3,
/// Block receipts index
BlockReceipts = 4,
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/// Epoch transition data index.
EpochTransitions = 5,
/// Pending epoch transition data index.
PendingEpochTransition = 6,
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}
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fn with_index(hash: &H256, i: ExtrasIndex) -> H264 {
let mut result = H264::default();
result[0] = i as u8;
Snapshot creation and restoration (#1679) * to_rlp takes self by-reference * clean up some derefs * out-of-order insertion for blockchain * implement block rebuilder without verification * group block chunk header into struct * block rebuilder does verification * integrate snapshot service with client service; flesh out implementation more * initial implementation of snapshot service * remove snapshottaker trait * snapshot writer trait with packed and loose implementations * write chunks using "snapshotwriter" in service * have snapshot taking use snapshotwriter * implement snapshot readers * back up client dbs when replacing * use snapshot reader in snapshot service * describe offset format * use new get_db_path in parity, allow some errors in service * blockchain formatting * implement parity snapshot * implement snapshot restore * force blocks to be submitted in order * fix bug loading block hashes in packed reader * fix seal field loading * fix uncle hash computation * fix a few bugs * store genesis state in db. reverse block chunk order in packed writer * allow out-of-order import for blocks * bring restoration types together * only snapshot the last 30000 blocks * restore into overlaydb instead of journaldb * commit version to database * use memorydbs and commit directly * fix trie test compilation * fix failing tests * sha3_null_rlp, not H256::zero * move overlaydb to ref_overlaydb, add new overlaydb without on-disk rc * port archivedb to new overlaydb * add deletion mode tests for overlaydb * use new overlaydb, check state root at end * share chain info between state and block snapshotting * create blocks snapshot using blockchain directly * allow snapshot from arbitrary block, remove panickers from snapshot creation * begin test framework * blockchain chunking test * implement stateproducer::tick * state snapshot test * create block and state chunks concurrently, better restoration informant * fix tests * add deletion mode tests for overlaydb * address comments * more tests * Fix up tests. * remove a few printlns * add a little more documentation to `commit` * fix tests * fix ref_overlaydb test names * snapshot command skeleton * revert ref_overlaydb renaming * reimplement snapshot commands * fix many errors * everything but inject * get ethcore compiling * get snapshot tests passing again * instrument snapshot commands again * fix fallout from other changes, mark snapshots as experimental * optimize injection patterns * do two injections * fix up tests * take snapshots from 1000 blocks efore * address minor comments * fix a few io crate related errors * clarify names about total difficulty [ci skip]
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(*result)[1..].clone_from_slice(hash);
result
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}
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pub struct BlockNumberKey([u8; 5]);
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impl ops::Deref for BlockNumberKey {
type Target = [u8];
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fn deref(&self) -> &Self::Target {
&self.0
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}
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}
impl Key<H256> for BlockNumber {
type Target = BlockNumberKey;
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fn key(&self) -> Self::Target {
let mut result = [0u8; 5];
result[0] = ExtrasIndex::BlockHash as u8;
result[1] = (self >> 24) as u8;
result[2] = (self >> 16) as u8;
result[3] = (self >> 8) as u8;
result[4] = *self as u8;
BlockNumberKey(result)
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}
}
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impl Key<BlockDetails> for H256 {
type Target = H264;
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fn key(&self) -> H264 {
with_index(self, ExtrasIndex::BlockDetails)
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}
}
pub struct LogGroupKey([u8; 6]);
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impl ops::Deref for LogGroupKey {
type Target = [u8];
fn deref(&self) -> &Self::Target {
&self.0
}
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}
#[derive(Debug, PartialEq, Eq, Hash, Clone)]
pub struct LogGroupPosition(GroupPosition);
impl From<bloomchain::group::GroupPosition> for LogGroupPosition {
fn from(position: bloomchain::group::GroupPosition) -> Self {
LogGroupPosition(From::from(position))
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}
}
impl HeapSizeOf for LogGroupPosition {
fn heap_size_of_children(&self) -> usize {
self.0.heap_size_of_children()
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}
}
impl Key<BloomGroup> for LogGroupPosition {
type Target = LogGroupKey;
fn key(&self) -> Self::Target {
let mut result = [0u8; 6];
result[0] = ExtrasIndex::BlocksBlooms as u8;
result[1] = self.0.level;
result[2] = (self.0.index >> 24) as u8;
result[3] = (self.0.index >> 16) as u8;
result[4] = (self.0.index >> 8) as u8;
result[5] = self.0.index as u8;
LogGroupKey(result)
}
}
impl Key<TransactionAddress> for H256 {
type Target = H264;
fn key(&self) -> H264 {
with_index(self, ExtrasIndex::TransactionAddress)
}
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}
impl Key<BlockReceipts> for H256 {
type Target = H264;
fn key(&self) -> H264 {
with_index(self, ExtrasIndex::BlockReceipts)
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}
}
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impl Key<::engines::epoch::PendingTransition> for H256 {
type Target = H264;
fn key(&self) -> H264 {
with_index(self, ExtrasIndex::PendingEpochTransition)
}
}
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/// length of epoch keys.
pub const EPOCH_KEY_LEN: usize = DB_PREFIX_LEN + 16;
/// epoch key prefix.
/// used to iterate over all epoch transitions in order from genesis.
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pub const EPOCH_KEY_PREFIX: &'static [u8; DB_PREFIX_LEN] = &[
ExtrasIndex::EpochTransitions as u8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
];
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pub struct EpochTransitionsKey([u8; EPOCH_KEY_LEN]);
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impl ops::Deref for EpochTransitionsKey {
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type Target = [u8];
fn deref(&self) -> &[u8] { &self.0[..] }
}
impl Key<EpochTransitions> for u64 {
type Target = EpochTransitionsKey;
fn key(&self) -> Self::Target {
let mut arr = [0u8; EPOCH_KEY_LEN];
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arr[..DB_PREFIX_LEN].copy_from_slice(&EPOCH_KEY_PREFIX[..]);
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write!(&mut arr[DB_PREFIX_LEN..], "{:016x}", self)
.expect("format arg is valid; no more than 16 chars will be written; qed");
EpochTransitionsKey(arr)
}
}
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/// Familial details concerning a block
#[derive(Debug, Clone, RlpEncodable, RlpDecodable)]
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pub struct BlockDetails {
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/// Block number
pub number: BlockNumber,
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/// Total difficulty of the block and all its parents
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pub total_difficulty: U256,
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/// Parent block hash
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pub parent: H256,
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/// List of children block hashes
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pub children: Vec<H256>,
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}
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impl HeapSizeOf for BlockDetails {
fn heap_size_of_children(&self) -> usize {
self.children.heap_size_of_children()
}
}
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/// Represents address of certain transaction within block
#[derive(Debug, PartialEq, Clone, RlpEncodable, RlpDecodable)]
pub struct TransactionAddress {
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/// Block hash
pub block_hash: H256,
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/// Transaction index within the block
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pub index: usize
}
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impl HeapSizeOf for TransactionAddress {
fn heap_size_of_children(&self) -> usize { 0 }
}
/// Contains all block receipts.
#[derive(Clone, RlpEncodableWrapper, RlpDecodableWrapper)]
pub struct BlockReceipts {
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pub receipts: Vec<Receipt>,
}
impl BlockReceipts {
pub fn new(receipts: Vec<Receipt>) -> Self {
BlockReceipts {
receipts: receipts
}
}
}
impl HeapSizeOf for BlockReceipts {
fn heap_size_of_children(&self) -> usize {
self.receipts.heap_size_of_children()
}
}
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/// Candidate transitions to an epoch with specific number.
#[derive(Clone, RlpEncodable, RlpDecodable)]
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pub struct EpochTransitions {
pub number: u64,
pub candidates: Vec<EpochTransition>,
}
#[cfg(test)]
mod tests {
use rlp::*;
use super::BlockReceipts;
#[test]
fn encode_block_receipts() {
let br = BlockReceipts::new(Vec::new());
let mut s = RlpStream::new_list(2);
s.append(&br);
assert!(!s.is_finished(), "List shouldn't finished yet");
s.append(&br);
assert!(s.is_finished(), "List should be finished now");
s.out();
}
}