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781 lines
20 KiB
781 lines
20 KiB
/*
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This file is part of cpp-ethereum.
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cpp-ethereum 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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cpp-ethereum 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 cpp-ethereum. If not, see <http://www.gnu.org/licenses/>.
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*/
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/** @file BlockChainSync.cpp
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* @author Gav Wood <i@gavwood.com>
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* @date 2014
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*/
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#include "BlockChainSync.h"
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#include <chrono>
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#include <libdevcore/Common.h>
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#include <libp2p/Host.h>
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#include <libp2p/Session.h>
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#include <libethcore/Exceptions.h>
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#include <libethcore/Params.h>
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#include "BlockChain.h"
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#include "BlockQueue.h"
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#include "EthereumPeer.h"
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#include "EthereumHost.h"
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#include "DownloadMan.h"
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using namespace std;
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using namespace dev;
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using namespace dev::eth;
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using namespace p2p;
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unsigned const c_chainReorgSize = 30000;
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BlockChainSync::BlockChainSync(EthereumHost& _host):
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m_host(_host)
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{
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m_bqRoomAvailable = host().bq().onRoomAvailable([this]()
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{
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RecursiveGuard l(x_sync);
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continueSync();
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});
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}
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BlockChainSync::~BlockChainSync()
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{
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abortSync();
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}
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DownloadMan const& BlockChainSync::downloadMan() const
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{
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return host().downloadMan();
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}
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DownloadMan& BlockChainSync::downloadMan()
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{
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return host().downloadMan();
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}
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void BlockChainSync::abortSync()
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{
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host().foreachPeer([this](EthereumPeer* _p) { onPeerAborting(_p); return true; });
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downloadMan().resetToChain(h256s());
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}
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void BlockChainSync::onPeerStatus(EthereumPeer* _peer)
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{
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RecursiveGuard l(x_sync);
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DEV_INVARIANT_CHECK;
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if (_peer->m_genesisHash != host().chain().genesisHash())
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_peer->disable("Invalid genesis hash");
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else if (_peer->m_protocolVersion != host().protocolVersion() && _peer->m_protocolVersion != EthereumHost::c_oldProtocolVersion)
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_peer->disable("Invalid protocol version.");
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else if (_peer->m_networkId != host().networkId())
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_peer->disable("Invalid network identifier.");
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else if (_peer->session()->info().clientVersion.find("/v0.7.0/") != string::npos)
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_peer->disable("Blacklisted client version.");
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else if (host().isBanned(_peer->session()->id()))
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_peer->disable("Peer banned for previous bad behaviour.");
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else
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{
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unsigned estimatedHashes = estimateHashes();
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_peer->m_expectedHashes = estimatedHashes;
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onNewPeer(_peer);
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}
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DEV_INVARIANT_CHECK;
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}
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unsigned BlockChainSync::estimateHashes()
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{
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BlockInfo block = host().chain().info();
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time_t lastBlockTime = (block.hash() == host().chain().genesisHash()) ? 1428192000 : (time_t)block.timestamp;
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time_t now = time(0);
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unsigned blockCount = c_chainReorgSize;
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if (lastBlockTime > now)
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clog(NetWarn) << "Clock skew? Latest block is in the future";
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else
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blockCount += (now - lastBlockTime) / (unsigned)c_durationLimit;
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clog(NetAllDetail) << "Estimated hashes: " << blockCount;
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return blockCount;
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}
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void BlockChainSync::requestBlocks(EthereumPeer* _peer)
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{
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if (host().bq().knownFull())
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{
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clog(NetAllDetail) << "Waiting for block queue before downloading blocks";
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m_lastActiveState = m_state;
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pauseSync();
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_peer->setIdle();
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return;
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}
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_peer->requestBlocks();
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if (_peer->m_asking != Asking::Blocks) //nothing to download
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{
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peerDoneBlocks(_peer);
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if (downloadMan().isComplete())
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completeSync();
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return;
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}
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}
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void BlockChainSync::onPeerBlocks(EthereumPeer* _peer, RLP const& _r)
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{
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RecursiveGuard l(x_sync);
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DEV_INVARIANT_CHECK;
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unsigned itemCount = _r.itemCount();
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clog(NetMessageSummary) << "Blocks (" << dec << itemCount << "entries)" << (itemCount ? "" : ": NoMoreBlocks");
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_peer->setIdle();
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if (m_state != SyncState::Blocks && m_state != SyncState::NewBlocks)
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clog(NetWarn) << "Unexpected Blocks received!";
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if (m_state == SyncState::Waiting)
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{
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clog(NetAllDetail) << "Ignored blocks while waiting";
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return;
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}
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if (itemCount == 0)
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{
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// Got to this peer's latest block - just give up.
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peerDoneBlocks(_peer);
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if (downloadMan().isComplete())
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completeSync();
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return;
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}
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unsigned success = 0;
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unsigned future = 0;
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unsigned unknown = 0;
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unsigned got = 0;
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unsigned repeated = 0;
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u256 maxUnknownNumber = 0;
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h256 maxUnknown;
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for (unsigned i = 0; i < itemCount; ++i)
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{
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auto h = BlockInfo::headerHash(_r[i].data());
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if (_peer->m_sub.noteBlock(h))
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{
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_peer->addRating(10);
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switch (host().bq().import(_r[i].data(), host().chain()))
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{
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case ImportResult::Success:
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success++;
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break;
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case ImportResult::Malformed:
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case ImportResult::BadChain:
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_peer->disable("Malformed block received.");
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return;
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case ImportResult::FutureTimeKnown:
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future++;
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break;
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case ImportResult::AlreadyInChain:
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case ImportResult::AlreadyKnown:
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got++;
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break;
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case ImportResult::FutureTimeUnknown:
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future++; //Fall through
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case ImportResult::UnknownParent:
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{
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unknown++;
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if (m_state == SyncState::NewBlocks)
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{
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BlockInfo bi;
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bi.populateFromHeader(_r[i][0]);
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if (bi.number > maxUnknownNumber)
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{
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maxUnknownNumber = bi.number;
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maxUnknown = h;
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}
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}
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break;
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}
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default:;
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}
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}
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else
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{
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_peer->addRating(0); // -1?
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repeated++;
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}
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}
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clog(NetMessageSummary) << dec << success << "imported OK," << unknown << "with unknown parents," << future << "with future timestamps," << got << " already known," << repeated << " repeats received.";
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if (host().bq().unknownFull())
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{
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clog(NetWarn) << "Too many unknown blocks, restarting sync";
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restartSync();
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return;
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}
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if (m_state == SyncState::NewBlocks && unknown > 0)
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{
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completeSync();
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resetSyncFor(_peer, maxUnknown, std::numeric_limits<u256>::max()); //TODO: proper total difficuty
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}
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if (m_state == SyncState::Blocks || m_state == SyncState::NewBlocks)
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{
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if (downloadMan().isComplete())
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completeSync();
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else if (!got)
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requestBlocks(_peer);
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else
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peerDoneBlocks(_peer);
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}
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DEV_INVARIANT_CHECK;
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}
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void BlockChainSync::onPeerNewBlock(EthereumPeer* _peer, RLP const& _r)
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{
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DEV_INVARIANT_CHECK;
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RecursiveGuard l(x_sync);
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auto h = BlockInfo::headerHash(_r[0].data());
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clog(NetMessageSummary) << "NewBlock: " << h;
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if (_r.itemCount() != 2)
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_peer->disable("NewBlock without 2 data fields.");
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else
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{
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switch (host().bq().import(_r[0].data(), host().chain()))
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{
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case ImportResult::Success:
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_peer->addRating(100);
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break;
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case ImportResult::FutureTimeKnown:
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//TODO: Rating dependent on how far in future it is.
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break;
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case ImportResult::Malformed:
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case ImportResult::BadChain:
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_peer->disable("Malformed block received.");
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return;
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case ImportResult::AlreadyInChain:
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case ImportResult::AlreadyKnown:
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break;
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case ImportResult::FutureTimeUnknown:
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case ImportResult::UnknownParent:
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clog(NetMessageSummary) << "Received block with no known parent. Resyncing...";
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resetSyncFor(_peer, h, _r[1].toInt<u256>());
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break;
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default:;
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}
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DEV_GUARDED(_peer->x_knownBlocks)
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_peer->m_knownBlocks.insert(h);
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}
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DEV_INVARIANT_CHECK;
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}
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PV60Sync::PV60Sync(EthereumHost& _host):
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BlockChainSync(_host)
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{
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resetSync();
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}
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SyncStatus PV60Sync::status() const
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{
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RecursiveGuard l(x_sync);
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SyncStatus res;
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res.state = m_state;
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if (m_state == SyncState::Hashes)
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{
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res.hashesTotal = m_estimatedHashes;
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res.hashesReceived = static_cast<unsigned>(m_syncingNeededBlocks.size());
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res.hashesEstimated = true;
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}
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else if (m_state == SyncState::Blocks || m_state == SyncState::NewBlocks || m_state == SyncState::Waiting)
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{
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res.blocksTotal = downloadMan().chainSize();
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res.blocksReceived = downloadMan().blocksGot().size();
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}
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return res;
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}
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void PV60Sync::setState(EthereumPeer* _peer, SyncState _s, bool _isSyncing, bool _needHelp)
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{
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bool changedState = (m_state != _s);
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m_state = _s;
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if (_isSyncing != (m_syncer == _peer) || (_isSyncing && changedState))
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changeSyncer(_isSyncing ? _peer : nullptr, _needHelp);
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else if (_s == SyncState::Idle)
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changeSyncer(nullptr, _needHelp);
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assert(!!m_syncer || _s == SyncState::Idle);
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}
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void PV60Sync::resetSync()
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{
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m_syncingLatestHash = h256();
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m_syncingLastReceivedHash = h256();
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m_syncingTotalDifficulty = 0;
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m_syncingNeededBlocks.clear();
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}
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void PV60Sync::restartSync()
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{
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resetSync();
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host().bq().clear();
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if (isSyncing())
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transition(m_syncer, SyncState::Idle);
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}
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void PV60Sync::completeSync()
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{
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if (isSyncing())
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transition(m_syncer, SyncState::Idle);
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}
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void PV60Sync::pauseSync()
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{
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if (isSyncing())
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setState(m_syncer, SyncState::Waiting, true);
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}
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void PV60Sync::continueSync()
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{
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transition(m_syncer, SyncState::Blocks);
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}
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void PV60Sync::onNewPeer(EthereumPeer* _peer)
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{
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setNeedsSyncing(_peer, _peer->m_latestHash, _peer->m_totalDifficulty);
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}
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void PV60Sync::transition(EthereumPeer* _peer, SyncState _s, bool _force, bool _needHelp)
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{
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clog(NetMessageSummary) << "Transition!" << EthereumHost::stateName(_s) << "from" << EthereumHost::stateName(m_state) << ", " << (isSyncing(_peer) ? "syncing" : "holding") << (needsSyncing(_peer) ? "& needed" : "");
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if (m_state == SyncState::Idle && _s != SyncState::Idle)
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_peer->m_requireTransactions = true;
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RLPStream s;
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if (_s == SyncState::Hashes)
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{
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if (m_state == SyncState::Idle)
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{
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if (isSyncing(_peer))
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clog(NetWarn) << "Bad state: not asking for Hashes, yet syncing!";
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m_syncingLatestHash = _peer->m_latestHash;
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m_syncingTotalDifficulty = _peer->m_totalDifficulty;
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setState(_peer, _s, true);
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_peer->requestHashes(m_syncingLastReceivedHash ? m_syncingLastReceivedHash : m_syncingLatestHash);
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DEV_INVARIANT_CHECK;
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return;
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}
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else if (m_state == SyncState::Hashes)
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{
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if (!isSyncing(_peer))
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clog(NetWarn) << "Bad state: asking for Hashes yet not syncing!";
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setState(_peer, _s, true);
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_peer->requestHashes(m_syncingLastReceivedHash);
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DEV_INVARIANT_CHECK;
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return;
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}
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}
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else if (_s == SyncState::Blocks)
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{
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if (m_state == SyncState::Hashes)
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{
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if (!isSyncing(_peer))
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{
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clog(NetWarn) << "Bad state: asking for Hashes yet not syncing!";
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return;
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}
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if (shouldGrabBlocks())
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{
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clog(NetNote) << "Difficulty of hashchain HIGHER. Grabbing" << m_syncingNeededBlocks.size() << "blocks [latest now" << m_syncingLatestHash << ", was" << host().latestBlockSent() << "]";
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downloadMan().resetToChain(m_syncingNeededBlocks);
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resetSync();
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}
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else
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{
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clog(NetNote) << "Difficulty of hashchain not HIGHER. Ignoring.";
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resetSync();
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setState(_peer, SyncState::Idle, false);
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return;
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}
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assert (isSyncing(_peer));
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}
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// run through into...
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if (m_state == SyncState::Idle || m_state == SyncState::Hashes || m_state == SyncState::Blocks || m_state == SyncState::Waiting)
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{
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// Looks like it's the best yet for total difficulty. Set to download.
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setState(_peer, SyncState::Blocks, isSyncing(_peer), _needHelp); // will kick off other peers to help if available.
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requestBlocks(_peer);
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DEV_INVARIANT_CHECK;
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return;
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}
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}
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else if (_s == SyncState::NewBlocks)
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{
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if (m_state != SyncState::Idle && m_state != SyncState::NewBlocks && m_state != SyncState::Waiting)
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clog(NetWarn) << "Bad state: Asking new blocks while syncing!";
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else
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{
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setState(_peer, SyncState::NewBlocks, true, _needHelp);
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requestBlocks(_peer);
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DEV_INVARIANT_CHECK;
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return;
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}
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}
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else if (_s == SyncState::Waiting)
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{
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if (m_state != SyncState::Blocks && m_state != SyncState::NewBlocks && m_state != SyncState::Hashes && m_state != SyncState::Waiting)
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clog(NetWarn) << "Bad state: Entering waiting state while not downloading blocks!";
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else
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{
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setState(_peer, SyncState::Waiting, isSyncing(_peer), _needHelp);
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return;
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}
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}
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else if (_s == SyncState::Idle)
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{
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host().foreachPeer([this](EthereumPeer* _p) { _p->setIdle(); return true; });
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if (m_state == SyncState::Blocks || m_state == SyncState::NewBlocks)
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{
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clog(NetNote) << "Finishing blocks fetch...";
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// a bit overkill given that the other nodes may yet have the needed blocks, but better to be safe than sorry.
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if (isSyncing(_peer))
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noteDoneBlocks(_peer, _force);
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// NOTE: need to notify of giving up on chain-hashes, too, altering state as necessary.
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_peer->m_sub.doneFetch();
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_peer->setIdle();
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setState(_peer, SyncState::Idle, false);
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}
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else if (m_state == SyncState::Hashes)
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{
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clog(NetNote) << "Finishing hashes fetch...";
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setState(_peer, SyncState::Idle, false);
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}
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// Otherwise it's fine. We don't care if it's Nothing->Nothing.
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DEV_INVARIANT_CHECK;
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return;
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}
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clog(NetWarn) << "Invalid state transition:" << EthereumHost::stateName(_s) << "from" << EthereumHost::stateName(m_state) << ", " << (isSyncing(_peer) ? "syncing" : "holding") << (needsSyncing(_peer) ? "& needed" : "");
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}
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void PV60Sync::resetSyncFor(EthereumPeer* _peer, h256 _latestHash, u256 _td)
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{
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setNeedsSyncing(_peer, _latestHash, _td);
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}
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void PV60Sync::setNeedsSyncing(EthereumPeer* _peer, h256 _latestHash, u256 _td)
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{
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_peer->m_latestHash = _latestHash;
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_peer->m_totalDifficulty = _td;
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if (_peer->m_latestHash)
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noteNeedsSyncing(_peer);
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_peer->session()->addNote("sync", string(isSyncing(_peer) ? "ongoing" : "holding") + (needsSyncing(_peer) ? " & needed" : ""));
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}
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bool PV60Sync::needsSyncing(EthereumPeer* _peer) const
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{
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return !!_peer->m_latestHash;
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}
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bool PV60Sync::isSyncing(EthereumPeer* _peer) const
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{
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return m_syncer == _peer;
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}
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bool PV60Sync::shouldGrabBlocks() const
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{
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auto td = m_syncingTotalDifficulty;
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auto lh = m_syncingLatestHash;
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auto ctd = host().chain().details().totalDifficulty;
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if (m_syncingNeededBlocks.empty())
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return false;
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clog(NetNote) << "Should grab blocks? " << td << "vs" << ctd << ";" << m_syncingNeededBlocks.size() << " blocks, ends" << m_syncingNeededBlocks.back();
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if (td < ctd || (td == ctd && host().chain().currentHash() == lh))
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return false;
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return true;
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}
|
|
|
|
void PV60Sync::attemptSync(EthereumPeer* _peer)
|
|
{
|
|
if (m_state != SyncState::Idle)
|
|
{
|
|
clog(NetAllDetail) << "Can't sync with this peer - outstanding asks.";
|
|
return;
|
|
}
|
|
|
|
// if already done this, then ignore.
|
|
if (!needsSyncing(_peer))
|
|
{
|
|
clog(NetAllDetail) << "Already synced with this peer.";
|
|
return;
|
|
}
|
|
|
|
unsigned n = host().chain().number();
|
|
u256 td = host().chain().details().totalDifficulty;
|
|
if (host().bq().isActive())
|
|
td += host().bq().difficulty();
|
|
|
|
clog(NetAllDetail) << "Attempt chain-grab? Latest:" << (m_syncingLastReceivedHash ? m_syncingLastReceivedHash : m_syncingLatestHash) << ", number:" << n << ", TD:" << td << " versus " << _peer->m_totalDifficulty;
|
|
if (td >= _peer->m_totalDifficulty)
|
|
{
|
|
clog(NetAllDetail) << "No. Our chain is better.";
|
|
resetNeedsSyncing(_peer);
|
|
transition(_peer, SyncState::Idle);
|
|
}
|
|
else
|
|
{
|
|
clog(NetAllDetail) << "Yes. Their chain is better.";
|
|
m_estimatedHashes = _peer->m_expectedHashes - c_chainReorgSize;
|
|
transition(_peer, SyncState::Hashes);
|
|
}
|
|
}
|
|
|
|
void PV60Sync::noteNeedsSyncing(EthereumPeer* _peer)
|
|
{
|
|
// if already downloading hash-chain, ignore.
|
|
if (isSyncing())
|
|
{
|
|
clog(NetAllDetail) << "Sync in progress: Just set to help out.";
|
|
if (m_state == SyncState::Blocks)
|
|
requestBlocks(_peer);
|
|
}
|
|
else
|
|
// otherwise check to see if we should be downloading...
|
|
attemptSync(_peer);
|
|
}
|
|
|
|
void PV60Sync::changeSyncer(EthereumPeer* _syncer, bool _needHelp)
|
|
{
|
|
if (_syncer)
|
|
clog(NetAllDetail) << "Changing syncer to" << _syncer->session()->socketId();
|
|
else
|
|
clog(NetAllDetail) << "Clearing syncer.";
|
|
|
|
m_syncer = _syncer;
|
|
if (isSyncing())
|
|
{
|
|
if (_needHelp && (m_state == SyncState::Blocks || m_state == SyncState::NewBlocks))
|
|
host().foreachPeer([&](EthereumPeer* _p)
|
|
{
|
|
clog(NetNote) << "Getting help with downloading blocks";
|
|
if (_p != _syncer && _p->m_asking == Asking::Nothing)
|
|
transition(_p, m_state);
|
|
return true;
|
|
});
|
|
}
|
|
else
|
|
{
|
|
// start grabbing next hash chain if there is one.
|
|
host().foreachPeer([this](EthereumPeer* _p)
|
|
{
|
|
attemptSync(_p);
|
|
return !isSyncing();
|
|
});
|
|
if (!isSyncing())
|
|
{
|
|
if (m_state != SyncState::Idle)
|
|
setState(_syncer, SyncState::Idle);
|
|
clog(NetNote) << "No more peers to sync with.";
|
|
}
|
|
}
|
|
assert(!!m_syncer || m_state == SyncState::Idle);
|
|
}
|
|
|
|
void PV60Sync::peerDoneBlocks(EthereumPeer* _peer)
|
|
{
|
|
noteDoneBlocks(_peer, false);
|
|
}
|
|
|
|
void PV60Sync::noteDoneBlocks(EthereumPeer* _peer, bool _clemency)
|
|
{
|
|
resetNeedsSyncing(_peer);
|
|
if (downloadMan().isComplete())
|
|
{
|
|
// Done our chain-get.
|
|
clog(NetNote) << "Chain download complete.";
|
|
// 1/100th for each useful block hash.
|
|
_peer->addRating(downloadMan().chainSize() / 100);
|
|
downloadMan().reset();
|
|
}
|
|
else if (isSyncing(_peer))
|
|
{
|
|
if (_clemency)
|
|
clog(NetNote) << "Chain download failed. Aborted while incomplete.";
|
|
else
|
|
{
|
|
// Done our chain-get.
|
|
clog(NetWarn) << "Chain download failed. Peer with blocks didn't have them all. This peer is bad and should be punished.";
|
|
clog(NetWarn) << downloadMan().remaining();
|
|
clog(NetWarn) << "WOULD BAN.";
|
|
// m_banned.insert(_peer->session()->id()); // We know who you are!
|
|
// _peer->disable("Peer sent hashes but was unable to provide the blocks.");
|
|
}
|
|
downloadMan().reset();
|
|
}
|
|
_peer->m_sub.doneFetch();
|
|
}
|
|
|
|
void PV60Sync::onPeerHashes(EthereumPeer* _peer, h256s const& _hashes)
|
|
{
|
|
RecursiveGuard l(x_sync);
|
|
DEV_INVARIANT_CHECK;
|
|
_peer->setIdle();
|
|
if (!isSyncing(_peer))
|
|
{
|
|
clog(NetMessageSummary) << "Ignoring hashes synce not syncing";
|
|
return;
|
|
}
|
|
if (_hashes.size() == 0)
|
|
{
|
|
transition(_peer, SyncState::Blocks);
|
|
return;
|
|
}
|
|
unsigned knowns = 0;
|
|
unsigned unknowns = 0;
|
|
for (unsigned i = 0; i < _hashes.size(); ++i)
|
|
{
|
|
auto h = _hashes[i];
|
|
auto status = host().bq().blockStatus(h);
|
|
if (status == QueueStatus::Importing || status == QueueStatus::Ready || host().chain().isKnown(h))
|
|
{
|
|
clog(NetMessageSummary) << "block hash ready:" << h << ". Start blocks download...";
|
|
assert (isSyncing(_peer));
|
|
transition(_peer, SyncState::Blocks);
|
|
return;
|
|
}
|
|
else if (status == QueueStatus::Bad)
|
|
{
|
|
cwarn << "block hash bad!" << h << ". Bailing...";
|
|
transition(_peer, SyncState::Idle);
|
|
return;
|
|
}
|
|
else if (status == QueueStatus::Unknown)
|
|
{
|
|
unknowns++;
|
|
m_syncingNeededBlocks.push_back(h);
|
|
}
|
|
else
|
|
knowns++;
|
|
m_syncingLastReceivedHash = h;
|
|
}
|
|
clog(NetMessageSummary) << knowns << "knowns," << unknowns << "unknowns; now at" << m_syncingLastReceivedHash;
|
|
if (m_syncingNeededBlocks.size() > _peer->m_expectedHashes)
|
|
{
|
|
_peer->disable("Too many hashes");
|
|
restartSync();
|
|
return;
|
|
}
|
|
// run through - ask for more.
|
|
transition(_peer, SyncState::Hashes);
|
|
DEV_INVARIANT_CHECK;
|
|
}
|
|
|
|
void PV60Sync::onPeerNewHashes(EthereumPeer* _peer, h256s const& _hashes)
|
|
{
|
|
RecursiveGuard l(x_sync);
|
|
DEV_INVARIANT_CHECK;
|
|
if (isSyncing())
|
|
{
|
|
clog(NetMessageSummary) << "Ignoring since we're already downloading.";
|
|
return;
|
|
}
|
|
unsigned knowns = 0;
|
|
unsigned unknowns = 0;
|
|
for (auto h: _hashes)
|
|
{
|
|
_peer->addRating(1);
|
|
DEV_GUARDED(_peer->x_knownBlocks)
|
|
_peer->m_knownBlocks.insert(h);
|
|
auto status = host().bq().blockStatus(h);
|
|
if (status == QueueStatus::Importing || status == QueueStatus::Ready || host().chain().isKnown(h))
|
|
knowns++;
|
|
else if (status == QueueStatus::Bad)
|
|
{
|
|
cwarn << "block hash bad!" << h << ". Bailing...";
|
|
return;
|
|
}
|
|
else if (status == QueueStatus::Unknown)
|
|
{
|
|
unknowns++;
|
|
m_syncingNeededBlocks.push_back(h);
|
|
}
|
|
else
|
|
knowns++;
|
|
}
|
|
clog(NetMessageSummary) << knowns << "knowns," << unknowns << "unknowns";
|
|
if (unknowns > 0)
|
|
{
|
|
clog(NetNote) << "Not syncing and new block hash discovered: syncing without help.";
|
|
downloadMan().resetToChain(m_syncingNeededBlocks);
|
|
resetSync();
|
|
transition(_peer, SyncState::NewBlocks, false, false);
|
|
}
|
|
DEV_INVARIANT_CHECK;
|
|
}
|
|
|
|
void PV60Sync::abortSync(EthereumPeer* _peer)
|
|
{
|
|
if (isSyncing(_peer))
|
|
{
|
|
host().foreachPeer([this](EthereumPeer* _p) { _p->setIdle(); return true; });
|
|
transition(_peer, SyncState::Idle, true);
|
|
}
|
|
DEV_INVARIANT_CHECK;
|
|
}
|
|
|
|
void PV60Sync::onPeerAborting(EthereumPeer* _peer)
|
|
{
|
|
abortSync(_peer);
|
|
DEV_INVARIANT_CHECK;
|
|
}
|
|
|
|
bool PV60Sync::invariants() const
|
|
{
|
|
if (m_state == SyncState::Idle && !!m_syncer)
|
|
return false;
|
|
if (m_state != SyncState::Idle && !m_syncer)
|
|
return false;
|
|
if (m_state == SyncState::Hashes)
|
|
{
|
|
bool hashes = false;
|
|
host().foreachPeer([&](EthereumPeer* _p) { if (_p->m_asking == Asking::Hashes) hashes = true; return !hashes; });
|
|
if (!hashes)
|
|
return false;
|
|
}
|
|
if (m_state == SyncState::Blocks || m_state == SyncState::NewBlocks)
|
|
{
|
|
bool blocks = false;
|
|
host().foreachPeer([&](EthereumPeer* _p) { if (_p->m_asking == Asking::Blocks) blocks = true; return !blocks; });
|
|
if (!blocks)
|
|
return false;
|
|
if (downloadMan().isComplete())
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|