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BlockChainSync.cpp
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/*
This file is part of cpp-ethereum.
cpp-ethereum 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.
cpp-ethereum 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 cpp-ethereum. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file BlockChainSync.cpp
* @author Gav Wood <i@gavwood.com>
* @date 2014
*/
#include "BlockChainSync.h"
#include <chrono>
#include <libdevcore/Common.h>
#include <libdevcore/TrieHash.h>
#include <libp2p/Host.h>
#include <libp2p/Session.h>
#include <libethcore/Exceptions.h>
#include "BlockChain.h"
#include "BlockQueue.h"
#include "EthereumPeer.h"
#include "EthereumHost.h"
#include <libdevcore/easylog.h>
using namespace std;
using namespace dev;
using namespace dev::eth;
using namespace p2p;
unsigned const c_maxPeerUknownNewBlocks = 1024; /// Max number of unknown new blocks peer can give us
unsigned const c_maxRequestHeaders = 1024;
unsigned const c_maxRequestBodies = 1024;
std::ostream& dev::eth::operator<<(std::ostream& _out, SyncStatus const& _sync)
{
_out << "protocol: " << _sync.protocolVersion << endl;
_out << "state: " << EthereumHost::stateName(_sync.state) << " ";
if (_sync.state == SyncState::Blocks || _sync.state == SyncState::NewBlocks)
_out << _sync.currentBlockNumber << "/" << _sync.highestBlockNumber;
return _out;
}
namespace // Helper functions.
{
template<typename T> bool haveItem(std::map<unsigned, T>& _container, unsigned _number)
{
if (_container.empty())
return false;
auto lower = _container.lower_bound(_number);
if (lower != _container.end() && lower->first == _number)
return true;
if (lower == _container.begin())
return false;
--lower;
return lower->first <= _number && (lower->first + lower->second.size()) > _number;
}
template<typename T> T const* findItem(std::map<unsigned, std::vector<T>>& _container, unsigned _number)
{
if (_container.empty())
return nullptr;
auto lower = _container.lower_bound(_number);
if (lower != _container.end() && lower->first == _number)
return &(*lower->second.begin());
if (lower == _container.begin())
return nullptr;
--lower;
if (lower->first <= _number && (lower->first + lower->second.size()) > _number)
return &lower->second.at(_number - lower->first);
return nullptr;
}
template<typename T> void removeItem(std::map<unsigned, std::vector<T>>& _container, unsigned _number)
{
if (_container.empty())
return;
auto lower = _container.lower_bound(_number);
if (lower != _container.end() && lower->first == _number)
{
auto new_list = std::move(lower->second);
new_list.erase(new_list.begin());
auto new_key = _number + 1;
_container.erase(lower);
if (new_list.size() > 0) {
_container.insert(std::make_pair(new_key, new_list));
}
return;
}
if (lower == _container.begin()) {
return;
}
--lower;
if (lower->first <= _number && (lower->first + lower->second.size()) > _number) {
auto new_list = std::move(lower->second);
new_list.erase(new_list.begin(), new_list.begin() + (_number - lower->first + 1));
auto new_key = _number + 1;
lower->second.erase(lower->second.begin() + (_number - lower->first), lower->second.end());
if (new_list.size() > 0) {
_container.insert(std::make_pair(new_key, new_list));
}
}
}
template<typename T> void removeAllStartingWith(std::map<unsigned, std::vector<T>>& _container, unsigned _number)
{
if (_container.empty())
return;
auto lower = _container.lower_bound(_number);
if (lower != _container.end() && lower->first == _number)
{
_container.erase(lower, _container.end());
return;
}
if (lower == _container.begin())
{
_container.clear();
return;
}
--lower;
if (lower->first <= _number && (lower->first + lower->second.size()) > _number)
lower->second.erase(lower->second.begin() + (_number - lower->first), lower->second.end());
_container.erase(++lower, _container.end());
}
template<typename T> void removeAllSmallerThan(std::map<unsigned, std::vector<T>>& _container, unsigned _number)
{
if (_container.empty())
return;
auto lower = _container.lower_bound(_number);
if (lower != _container.end() && lower->first == _number)
{
auto new_list = std::move(lower->second);
new_list.erase(new_list.begin());
auto new_key = _number + 1;
_container.erase(_container.begin(), ++lower);
if (new_list.size() > 0) {
_container.insert(std::make_pair(new_key, new_list));
}
return;
}
if (lower == _container.begin())
{
return;
}
--lower;
if (lower->first <= _number && (lower->first + lower->second.size()) > _number) {
auto new_list = std::move(lower->second);
new_list.erase(new_list.begin(), new_list.begin() + (_number - lower->first + 1));
auto new_key = _number + 1;
_container.erase(_container.begin(), ++lower);
if (new_list.size() > 0) {
_container.insert(std::make_pair(new_key, new_list));
}
} else {
_container.erase(_container.begin(), ++lower);
}
}
template<typename T> void mergeInto(std::map<unsigned, std::vector<T>>& _container, unsigned _number, T&& _data)
{
assert(!haveItem(_container, _number));
auto lower = _container.lower_bound(_number);
if (!_container.empty() && lower != _container.begin())
--lower;
if (lower != _container.end() && (lower->first + lower->second.size() == _number))
{
// extend existing chunk
lower->second.emplace_back(_data);
auto next = lower;
++next;
if (next != _container.end() && (lower->first + lower->second.size() == next->first))
{
// merge with the next chunk
std::move(next->second.begin(), next->second.end(), std::back_inserter(lower->second));
_container.erase(next);
}
}
else
{
// insert a new chunk
auto inserted = _container.insert(lower, std::make_pair(_number, std::vector<T> { _data }));
auto next = inserted;
++next;
if (next != _container.end() && next->first == _number + 1)
{
std::move(next->second.begin(), next->second.end(), std::back_inserter(inserted->second));
_container.erase(next);
}
}
}
} // Anonymous namespace -- helper functions.
BlockChainSync::BlockChainSync(EthereumHost& _host):
m_host(_host),
m_startingBlock(_host.chain().number()),
m_lastImportedBlock(m_startingBlock),
m_lastImportedBlockHash(_host.chain().currentHash())
{
m_bqRoomAvailable = host().bq().onRoomAvailable([this]()
{
RecursiveGuard l(x_sync);
LOG(TRACE) << "onRoomAvailable set state=SyncState::Blocks, before=" << EthereumHost::stateName(m_state);
auto raw_state = m_state;
m_state = SyncState::Blocks;
bool ret = continueSync();
if (!ret) {
m_state = raw_state;
}
});
}
BlockChainSync::~BlockChainSync()
{
RecursiveGuard l(x_sync);
abortSync();
}
void BlockChainSync::onForceSync() {
RecursiveGuard l(x_sync);
if (m_state != SyncState::Blocks) {
LOG(TRACE) << "onForceSync set state=SyncState::Blocks, before=" << EthereumHost::stateName(m_state);
auto raw_state = m_state;
m_state = SyncState::Blocks;
bool ret = continueSync();
if (!ret) {
m_state = raw_state;
}
}
}
void BlockChainSync::onBlockImported(BlockHeader const& _info)
{
//if a block has been added via mining or other block import function
//through RPC, then we should count it as a last imported block
RecursiveGuard l(x_sync);
if (_info.number() > m_lastImportedBlock)
{
m_lastImportedBlock = static_cast<unsigned>(_info.number());
m_lastImportedBlockHash = _info.hash();
m_highestBlock = max(m_lastImportedBlock, m_highestBlock);
auto head = findItem(m_headers, m_lastImportedBlock);
if (head && head->hash == m_lastImportedBlockHash) { // 在下载的块已经上链
LOG(TRACE) << "BlockChainSync::onBlockImported remove header&body blk=" << m_lastImportedBlock << ",hash=" << m_lastImportedBlockHash;
removeItem(m_headers, m_lastImportedBlock);
removeItem(m_bodies, m_lastImportedBlock);
}
LOG(TRACE) << "BlockChainSync::onBlockImported remove downloading blk=" << m_lastImportedBlock << ",hash=" << m_lastImportedBlockHash;
m_headerIdToNumber.erase(m_lastImportedBlockHash);
m_downloadingBodies.erase(m_lastImportedBlock);
m_downloadingHeaders.erase(m_lastImportedBlock);
if (m_headers.empty()) {
if (!m_bodies.empty()) {
LOG(TRACE) << "Block headers map is empty, but block bodies map is not. Force-clearing.";
m_bodies.clear();
}
completeSync();
LOG(TRACE) << "BlockChainSync::onBlockImported completeSync";
}
}
}
void BlockChainSync::abortSync()
{
resetSync();
host().foreachPeer([&](std::shared_ptr<EthereumPeer> _p)
{
_p->abortSync();
return true;
});
}
void BlockChainSync::onPeerStatus(std::shared_ptr<EthereumPeer> _peer)
{
RecursiveGuard l(x_sync);
DEV_INVARIANT_CHECK;
std::shared_ptr<SessionFace> session = _peer->session();
if (!session)
return; // Expired
if (_peer->m_genesisHash != host().chain().genesisHash())
_peer->disable("Invalid genesis hash");
else if (_peer->m_protocolVersion != host().protocolVersion() && _peer->m_protocolVersion != EthereumHost::c_oldProtocolVersion)
_peer->disable("Invalid protocol version.");
else if (_peer->m_networkId != host().networkId())
_peer->disable("Invalid network identifier.");
else if (session->info().clientVersion.find("/v0.7.0/") != string::npos)
_peer->disable("Blacklisted client version.");
else if (host().isBanned(session->id()))
_peer->disable("Peer banned for previous bad behaviour.");
else if (_peer->m_asking != Asking::State && _peer->m_asking != Asking::Nothing)
_peer->disable("Peer banned for unexpected status message.");
else {
LOG(TRACE) << "onPeerStatus call syncPeer";
syncPeer(_peer, false);
}
}
bool BlockChainSync::syncPeer(std::shared_ptr<EthereumPeer> _peer, bool _force)
{
LOG(TRACE) << "syncPeer: _force=" << _force << ",m_state=" << EthereumHost::stateName(m_state) << ",asking=" << EthereumPeer::toString(_peer->m_asking) << ",peer=" << _peer->id();
if (_peer->m_asking != Asking::Nothing)
{
LOG(TRACE) << "Can't sync with this peer - outstanding asks.";
return false;
}
if (m_state == SyncState::Waiting) { // 等待bq队列空出之后回调onRoomAvaliable重置状态
LOG(TRACE) << "Can't sync with this peer - waiting.";
return false;
}
u256 td = host().chain().details().totalDifficulty;
if (host().bq().isActive())
td += host().bq().difficulty();
u256 syncingDifficulty = std::max(m_syncingTotalDifficulty, td);
LOG(TRACE) << "syncPeer: _force=" << _force << ",td=" << _peer->m_totalDifficulty << syncingDifficulty << m_syncingTotalDifficulty;
if (_force || _peer->m_totalDifficulty > syncingDifficulty)
{
// start sync
m_syncingTotalDifficulty = _peer->m_totalDifficulty;
if (m_state == SyncState::Idle || m_state == SyncState::NotSynced) {
LOG(TRACE) << "syncPeer set state=SyncState::Blocks, before=" << EthereumHost::stateName(m_state);
m_state = SyncState::Blocks;
}
m_downloadingHeaders.insert(static_cast<unsigned>(_peer->m_height));
m_headerSyncPeers[_peer].push_back(static_cast<unsigned>(_peer->m_height));
_peer->requestBlockHeaders(_peer->m_latestHash, 1, 0, false);
LOG(TRACE) << "syncPeer:requestBlockHeaders, blk=" << _peer->m_height << ",peer=" << _peer->id();
_peer->m_requireTransactions = true;
return true;
}
if (m_state == SyncState::Blocks)
{
LOG(TRACE) << "syncPeer:requestBlocks, peer=" << _peer->id();
return requestBlocks(_peer);
}
return false;
}
bool BlockChainSync::continueSync()
{
bool ret = false;
host().foreachPeer([&](std::shared_ptr<EthereumPeer> _p)
{
ret = this->syncPeer(_p, false) || ret;
return true;
});
return ret;
}
bool BlockChainSync::requestBlocks(std::shared_ptr<EthereumPeer> _peer)
{
clearPeerDownload(_peer);
if (host().bq().knownFull())
{
LOG(TRACE) << "Waiting for block queue before downloading blocks";
pauseSync();
return false;
}
// check to see if we need to download any block bodies first
auto header = m_headers.begin();
h256s neededBodies;
vector<unsigned> neededNumbers;
unsigned index = 0;
if (m_haveCommonHeader && !m_headers.empty() && m_headers.begin()->first == m_lastImportedBlock + 1)
{
while (header != m_headers.end() && neededBodies.size() < c_maxRequestBodies && index < header->second.size())
{
unsigned block = header->first + index;
if (m_downloadingBodies.count(block) == 0 && !haveItem(m_bodies, block) && _peer->m_height >= block)
{
neededBodies.push_back(header->second[index].hash);
neededNumbers.push_back(block);
m_downloadingBodies.insert(block);
}
++index;
if (index >= header->second.size())
break; // Download bodies only for validated header chain
}
}
if (neededBodies.size() > 0)
{
m_bodySyncPeers[_peer] = neededNumbers;
_peer->requestBlockBodies(neededBodies);
LOG(TRACE) << "requestBlockBodies, size=" << neededBodies.size() << ",peer=" << _peer->id();
return true;
}
else
{
// check if need to download headers
unsigned start = 0;
if (!m_haveCommonHeader)
{
// download backwards until common block is found 1 header at a time
start = m_lastImportedBlock;
if (!m_headers.empty())
start = std::min(start, m_headers.begin()->first - 1);
m_lastImportedBlock = start;
m_lastImportedBlockHash = host().chain().numberHash(start);
if (start <= 0)
m_haveCommonHeader = ( true); //reached genesis
}
if (m_haveCommonHeader)
{
start = m_lastImportedBlock + 1;
auto next = m_headers.begin();
unsigned count = 0;
if (!m_headers.empty() && start >= m_headers.begin()->first)
{
start = m_headers.begin()->first + m_headers.begin()->second.size();
++next;
}
while (count == 0 && next != m_headers.end())
{
count = std::min(c_maxRequestHeaders, next->first - start);
while (count > 0 && (m_downloadingHeaders.count(start) != 0 || _peer->m_height < start))
{
start++;
count--;
}
std::vector<unsigned> headers;
for (unsigned block = start; block < start + count; block++) {
headers.push_back(block);
m_downloadingHeaders.insert(block);
}
count = headers.size();
if (count > 0)
{
m_headerSyncPeers[_peer] = headers;
assert(!haveItem(m_headers, start));
_peer->requestBlockHeaders(start, count, 0, false);
LOG(TRACE) << "requestBlockHeaders, start=" << start << ",count=" << count << ",peer=" << _peer->id();
return true;
}
else if (start >= next->first)
{
start = next->first + next->second.size();
++next;
}
}
}
else {
m_downloadingHeaders.insert(start);
m_headerSyncPeers[_peer].push_back(start);
_peer->requestBlockHeaders(start, 1, 0, false);
LOG(TRACE) << "requestBlockHeaders, start=" << start << ",count=1,peer=" << _peer->id();
return true;
}
}
return false;
}
void BlockChainSync::clearPeerDownload(std::shared_ptr<EthereumPeer> _peer)
{
ostringstream oss1, oss2;
auto syncPeer = m_headerSyncPeers.find(_peer);
if (syncPeer != m_headerSyncPeers.end())
{
for (unsigned block : syncPeer->second) {
m_downloadingHeaders.erase(block);
oss1 << block << ",";
}
m_headerSyncPeers.erase(syncPeer);
}
syncPeer = m_bodySyncPeers.find(_peer);
if (syncPeer != m_bodySyncPeers.end())
{
for (unsigned block : syncPeer->second) {
m_downloadingBodies.erase(block);
oss2 << block << ",";
}
m_bodySyncPeers.erase(syncPeer);
}
LOG(TRACE) << "clearPeerDownload: peer=" << _peer->id() << ", delete_header=" << oss1.str() << "delete_body=" << oss2.str();
}
void BlockChainSync::clearPeerDownloadHeaders(std::shared_ptr<EthereumPeer> _peer)
{
ostringstream oss1;
auto syncPeer = m_headerSyncPeers.find(_peer);
if (syncPeer != m_headerSyncPeers.end())
{
for (unsigned block : syncPeer->second) {
m_downloadingHeaders.erase(block);
oss1 << block << ",";
}
m_headerSyncPeers.erase(syncPeer);
}
LOG(TRACE) << "clearPeerDownloadHeaders: peer=" << _peer->id() << ", delete_header=" << oss1.str();
}
void BlockChainSync::clearPeerDownloadBodies(std::shared_ptr<EthereumPeer> _peer)
{
ostringstream oss2;
auto syncPeer = m_bodySyncPeers.find(_peer);
if (syncPeer != m_bodySyncPeers.end())
{
for (unsigned block : syncPeer->second) {
m_downloadingBodies.erase(block);
oss2 << block << ",";
}
m_bodySyncPeers.erase(syncPeer);
}
LOG(TRACE) << "clearPeerDownloadBodies: peer=" << _peer->id() << "delete_body=" << oss2.str();
}
void BlockChainSync::clearPeerDownload()
{
for (auto s = m_headerSyncPeers.begin(); s != m_headerSyncPeers.end();)
{
if (s->first.expired())
{
for (unsigned block : s->second)
m_downloadingHeaders.erase(block);
m_headerSyncPeers.erase(s++);
}
else
++s;
}
for (auto s = m_bodySyncPeers.begin(); s != m_bodySyncPeers.end();)
{
if (s->first.expired())
{
for (unsigned block : s->second)
m_downloadingBodies.erase(block);
m_bodySyncPeers.erase(s++);
}
else
++s;
}
}
void BlockChainSync::logNewBlock(h256 const& _h)
{
if (m_state == SyncState::NewBlocks)
LOG(TRACE) << "NewBlock: " << _h;
m_knownNewHashes.erase(_h);
}
void BlockChainSync::onPeerBlockHeaders(std::shared_ptr<EthereumPeer> _peer, RLP const& _r)
{
RecursiveGuard l(x_sync);
DEV_INVARIANT_CHECK;
size_t itemCount = _r.itemCount();
LOG(TRACE) << "BlocksHeaders (" << dec << itemCount << "entries)" << (itemCount ? "" : ": NoMoreHeaders") << ",from=" << _peer->id();
clearPeerDownload(_peer);
if (m_state != SyncState::Blocks && m_state != SyncState::NewBlocks && m_state != SyncState::Waiting)
{
LOG(TRACE) << "Ignoring unexpected blocks" << EthereumHost::stateName(m_state);
return;
}
if (m_state == SyncState::Waiting)
{
LOG(TRACE) << "Ignored blocks while waiting";
return;
}
if (itemCount == 0)
{
LOG(TRACE) << "Peer does not have the blocks requested";
_peer->addRating(-1);
}
for (unsigned i = 0; i < itemCount; i++)
{
BlockHeader info(_r[i].data(), HeaderData);
unsigned blockNumber = static_cast<unsigned>(info.number());
if (haveItem(m_headers, blockNumber))
{
LOG(TRACE) << "block in m_headers, Skipping header " << blockNumber;
continue;
}
if (blockNumber <= m_lastImportedBlock && m_haveCommonHeader )
{
LOG(TRACE) << "block small than m_lastImportedBlock, Skipping header " << blockNumber;
continue;
}
if (blockNumber > m_highestBlock)
m_highestBlock = blockNumber;
auto status = host().bq().blockStatus(info.hash());
LOG(TRACE) << "BlockChainSync::onPeerBlockHeaders status=" << (unsigned)status << ",blockNumber=" << blockNumber << ",m_haveCommonHeader=" << m_haveCommonHeader << ",m_lastImportedBlock=" << m_lastImportedBlock << ",isKown=" << toString(host().chain().isKnown(info.hash()));
if (status == QueueStatus::Importing || status == QueueStatus::Ready || host().chain().isKnown(info.hash()))
{
m_haveCommonHeader = ( true);
m_lastImportedBlock = blockNumber;
m_lastImportedBlockHash = info.hash();
}
else
{
Header hdr { _r[i].data().toBytes(), info.hash(), info.parentHash() };
// validate chain
if (m_haveCommonHeader)
{
// 在已下载的块头中，看是否存在自己的父块
Header const* prevBlock = findItem(m_headers, blockNumber - 1);
if ((prevBlock && prevBlock->hash != info.parentHash()) || (blockNumber == m_lastImportedBlock + 1 && info.parentHash() != m_lastImportedBlockHash))
{
// mismatching parent id, delete the previous block and don't add this one
LOG(TRACE) << "Unknown block header " << blockNumber << " " << info.hash() << " (Restart syncing)";
_peer->addRating(-1);
restartSync();
return ;
}
Header const* nextBlock = findItem(m_headers, blockNumber + 1);
if (nextBlock && nextBlock->parent != info.hash())
{
LOG(TRACE) << "Unknown block header " << blockNumber + 1 << " " << nextBlock->hash;
// clear following headers
unsigned n = blockNumber + 1;
auto headers = m_headers.at(n);
for (auto const& h : headers)
{
//BlockHeader deletingInfo(h.data, HeaderData);
//HeaderId header_id = { deletingInfo.transactionsRoot(), deletingInfo.sha3Uncles() };
m_headerIdToNumber.erase(h.hash);
m_downloadingBodies.erase(n);
m_downloadingHeaders.erase(n);
++n;
}
removeAllStartingWith(m_headers, blockNumber + 1);
removeAllStartingWith(m_bodies, blockNumber + 1);
}
}
mergeInto(m_headers, blockNumber, std::move(hdr));
m_headerIdToNumber[info.hash()] = blockNumber;
}
}
collectBlocks();
continueSync();
}
void BlockChainSync::onPeerBlockBodies(std::shared_ptr<EthereumPeer> _peer, RLP const& _r)
{
RecursiveGuard l(x_sync);
DEV_INVARIANT_CHECK;
size_t itemCount = _r.itemCount();
LOG(TRACE) << "BlocksBodies (" << dec << itemCount << "entries)" << (itemCount ? "" : ": NoMoreBodies") << ",from=" << _peer->id();
clearPeerDownload(_peer);
if (m_state != SyncState::Blocks && m_state != SyncState::NewBlocks && m_state != SyncState::Waiting) {
LOG(TRACE) << "Ignoring unexpected blocks" << EthereumHost::stateName(m_state);
return;
}
if (m_state == SyncState::Waiting)
{
LOG(TRACE) << "Ignored blocks while waiting";
return;
}
if (itemCount == 0)
{
LOG(TRACE) << "Peer does not have the blocks requested";
_peer->addRating(-1);
}
for (unsigned i = 0; i < itemCount; i++)
{
RLP body(_r[i]);
auto id = body[2].toHash<h256>();
auto iter = m_headerIdToNumber.find(id);
if (iter == m_headerIdToNumber.end())
{
LOG(TRACE) << "Ignored unknown block body, not in m_headerIdToNumber";
continue;
}
unsigned blockNumber = iter->second;
Header const* header = findItem(m_headers, blockNumber);
if (header == nullptr) {
LOG(TRACE) << "Ignored unknown block body " << blockNumber;
continue;
}
if (haveItem(m_bodies, blockNumber))
{
LOG(TRACE) << "Skipping already downloaded block body " << blockNumber;
continue;
}
auto txList = body[0];
h256 transactionRoot = trieRootOver(txList.itemCount(), [&](unsigned i) { return rlp(i); }, [&](unsigned i) { return txList[i].data().toBytes(); });
h256 uncles = sha3(body[1].data());
auto bi = BlockHeader(header->data, HeaderData);
if (transactionRoot != bi.transactionsRoot() || uncles != bi.sha3Uncles()) {
LOG(TRACE) << "Ignored illegal downloaded block body " << blockNumber;
continue;
}
m_headerIdToNumber.erase(id);
mergeInto(m_bodies, blockNumber, body.data().toBytes());
}
collectBlocks();
continueSync();
}
void BlockChainSync::collectBlocks()
{
if (m_haveCommonHeader && m_headers.empty() && m_downloadingHeaders.empty() && m_downloadingBodies.empty()) {
if (!m_bodies.empty())
{
LOG(TRACE) << "Block headers map is empty, but block bodies map is not. Force-clearing.";
m_bodies.clear();
}
completeSync();
LOG(TRACE) << "collectBlocks: (0) completeSync";
return;
}
if (!m_haveCommonHeader || m_headers.empty() || m_bodies.empty()) {
LOG(TRACE) << "collectBlocks: (1)" << m_haveCommonHeader << m_headers.empty() << m_bodies.empty();
return;
}
// merge headers and bodies
auto& headers = *m_headers.begin();
auto& bodies = *m_bodies.begin();
if (headers.first != bodies.first || headers.first != m_lastImportedBlock + 1) {
LOG(TRACE) << "collectBlocks: (2)" << headers.first << ", " << bodies.first << ", " << m_lastImportedBlock;
return;
}
unsigned success = 0;
unsigned future = 0;
unsigned got = 0;
unsigned unknown = 0;
size_t i = 0;
for (; i < headers.second.size() && i < bodies.second.size(); i++)
{
RLPStream blockStream(5);
blockStream.appendRaw(headers.second[i].data); // header
RLP body(bodies.second[i]);
blockStream.appendRaw(body[0].data()); // tx
blockStream.appendRaw(body[1].data()); // uncles
blockStream.appendRaw(body[2].data()); // hash
blockStream.appendRaw(body[3].data()); // sign_list
bytes block;
blockStream.swapOut(block);
auto block_number = headers.first + (unsigned)i;
switch (host().bq().import(&block))
{
case ImportResult::Success:
success++;
if (block_number > m_lastImportedBlock)
{
m_lastImportedBlock = block_number;
m_lastImportedBlockHash = headers.second[i].hash;
}
m_highestBlock = max(m_lastImportedBlock, m_highestBlock);
m_downloadingBodies.erase(block_number);
m_downloadingHeaders.erase(block_number);
if (block_number % 100 == 0) {
DEV_BLOCK_STAT_LOG(headers.second[i].hash, block_number, utcTime(), "BlockChainSync::collectBlocks");
}
break;
case ImportResult::Malformed:
case ImportResult::BadChain:
LOG(TRACE) << "collectBlocks BadChain";
restartSync();
return;
case ImportResult::FutureTimeKnown:
future++;
break;
case ImportResult::AlreadyInChain:
case ImportResult::AlreadyKnown:
++got;
break;
case ImportResult::FutureTimeUnknown:
case ImportResult::UnknownParent:
++unknown;
if (headers.first + i > m_lastImportedBlock)
{
resetSync();
LOG(TRACE) << "collectBlocks (3) set m_haveCommonHeader=false block_number=" << block_number;
m_haveCommonHeader = false; // fork detected, search for common header again
}
return;
default:;
}
}
LOG(TRACE) << dec << success << "imported OK," << unknown << "with unknown parents," << future << "with future timestamps," << got << " already known received.";
if (host().bq().unknownFull())
{
clog(NetWarn) << "Too many unknown blocks, restarting sync";
restartSync();
return;
}
auto newHeaders = std::move(headers.second);
newHeaders.erase(newHeaders.begin(), newHeaders.begin() + i);
unsigned newHeaderHead = headers.first + i;
auto newBodies = std::move(bodies.second);
newBodies.erase(newBodies.begin(), newBodies.begin() + i);
unsigned newBodiesHead = bodies.first + i;
m_headers.erase(m_headers.begin());
m_bodies.erase(m_bodies.begin());
if (!newHeaders.empty())
m_headers[newHeaderHead] = newHeaders;
if (!newBodies.empty())
m_bodies[newBodiesHead] = newBodies;
if (m_headers.empty())
{
LOG(TRACE) << "collectBlocks completeSync";
assert(m_bodies.empty());
completeSync();
}
DEV_INVARIANT_CHECK_HERE;
}
void BlockChainSync::onPeerNewBlock(std::shared_ptr<EthereumPeer> _peer, RLP const& _r)
{
RecursiveGuard l(x_sync);
DEV_INVARIANT_CHECK;
if (_r.itemCount() != 2)
{
_peer->disable("NewBlock without 2 data fields.");
return;
}
BlockHeader info(_r[0][0].data(), HeaderData);
auto h = info.hash();
LOG(TRACE) << "onPeerNewBlock: blk=" << info.number() << ",hash=" << h;
DEV_GUARDED(_peer->x_knownBlocks)
{
if (_peer->m_knownBlocks.size() > EthereumPeer::kKnownBlockSize) {
_peer->m_knownBlocks.pop();
}
_peer->m_knownBlocks.insert(h);
}
if (info.number() > _peer->m_height) {
_peer->m_height = info.number();
_peer->m_latestHash = h;
}
u256 totalDifficulty = _r[1].toInt<u256>();
u256 rawPeerTd = _peer->m_totalDifficulty;
if (totalDifficulty > _peer->m_totalDifficulty) {
_peer->m_totalDifficulty = totalDifficulty;
}
unsigned blockNumber = static_cast<unsigned>(info.number());
if (blockNumber > (m_lastImportedBlock + 1))
{
LOG(TRACE) << "Received unknown new block, height=" << blockNumber << ",hash=" << h << "m_lastImportedBlock=" << m_lastImportedBlock;
syncPeer(_peer, true);
return;
}
switch (host().bq().import(_r[0].data()))
{
case ImportResult::Success:
_peer->addRating(100);
logNewBlock(h);
if (blockNumber > m_lastImportedBlock)
{
m_lastImportedBlock = max(m_lastImportedBlock, blockNumber);
m_lastImportedBlockHash = h;
}
m_highestBlock = max(m_lastImportedBlock, m_highestBlock);
m_downloadingBodies.erase(blockNumber);
m_downloadingHeaders.erase(blockNumber);
removeItem(m_headers, blockNumber);
removeItem(m_bodies, blockNumber);
if (m_headers.empty())
{
if (!m_bodies.empty())
{
LOG(TRACE) << "Block headers map is empty, but block bodies map is not. Force-clearing.";
m_bodies.clear();
}
completeSync();
}
break;
case ImportResult::FutureTimeKnown:
//TODO: Rating dependent on how far in future it is.
break;
case ImportResult::Malformed:
case ImportResult::BadChain:
logNewBlock(h);
_peer->disable("Malformed block received.");
return;
case ImportResult::AlreadyInChain:
case ImportResult::AlreadyKnown:
break;
case ImportResult::FutureTimeUnknown:
case ImportResult::UnknownParent:
{
_peer->m_unknownNewBlocks++;
if (_peer->m_unknownNewBlocks > c_maxPeerUknownNewBlocks)
{
_peer->disable("Too many uknown new blocks");
restartSync();
}
logNewBlock(h);
//u256 totalDifficulty = _r[1].toInt<u256>();
if (totalDifficulty > rawPeerTd)
{
LOG(TRACE) << "Received block with no known parent. Peer needs syncing...";
syncPeer(_peer, true);
}
break;
}
default:;
}
}
SyncStatus BlockChainSync::status() const
{
RecursiveGuard l(x_sync);
SyncStatus res;
res.state = m_state;
res.protocolVersion = 62;
res.startBlockNumber = m_startingBlock;
res.currentBlockNumber = host().chain().number();
res.highestBlockNumber = m_highestBlock;
return res;
}
void BlockChainSync::resetSync()
{
m_downloadingHeaders.clear();
m_downloadingBodies.clear();
m_headers.clear();
m_bodies.clear();
m_headerSyncPeers.clear();
m_bodySyncPeers.clear();
m_headerIdToNumber.clear();
m_syncingTotalDifficulty = 0;
m_state = SyncState::NotSynced;
}
void BlockChainSync::restartSync()
{
RecursiveGuard l(x_sync);
resetSync();
m_highestBlock = 0;
m_haveCommonHeader = false;
host().bq().clear();