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PBFT.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: PBFT.cpp
* @author: fisco-dev
*
* @date: 2017
*/
#include <boost/filesystem.hpp>
#include <libethcore/ChainOperationParams.h>
#include <libethcore/CommonJS.h>
#include <libethereum/Interface.h>
#include <libethereum/BlockChain.h>
#include <libethereum/EthereumHost.h>
#include <libethereum/NodeConnParamsManagerApi.h>
#include <libdevcrypto/Common.h>
#include "PBFT.h"
#include <libdevcore/easylog.h>
#include <libdevcore/LogGuard.h>
#include <libethereum/StatLog.h>
#include <libethereum/ConsensusControl.h>
using namespace std;
using namespace dev;
using namespace eth;
void PBFT::init()
{
ETH_REGISTER_SEAL_ENGINE(PBFT);
}
PBFT::PBFT()
{
}
PBFT::~PBFT() {
if (m_backup_db) {
delete m_backup_db;
}
stopWorking();
}
void PBFT::initEnv(std::weak_ptr<PBFTHost> _host, BlockChain* _bc, OverlayDB* _db, BlockQueue *bq, KeyPair const& _key_pair, unsigned _view_timeout)
{
Guard l(m_mutex);
m_host = _host;
m_bc.reset(_bc);
m_stateDB.reset(_db);
m_bq.reset(bq);
m_bc->setSignChecker([this](BlockHeader const & _header, std::vector<std::pair<u256, Signature>> _sign_list) {
return checkBlockSign(_header, _sign_list);
});
m_key_pair = _key_pair;
resetConfig();
m_view_timeout = _view_timeout;
m_consensus_block_number = 0;
m_last_consensus_time = utcTime();
m_change_cycle = 0;
m_to_view = 0;
m_leader_failed = false;
m_last_sign_time = 0;
m_last_collect_time = std::chrono::system_clock::now();
m_future_prepare_cache = std::make_pair(Invalid256, PrepareReq());
m_last_exec_finish_time = utcTime();
initBackupDB();
LOG(INFO) << "PBFT initEnv success";
}
void PBFT::initBackupDB() {
ldb::Options o;
o.max_open_files = 256;
o.create_if_missing = true;
std::string path = m_bc->chainParams().dataDir + "/pbftMsgBackup";
ldb::Status status = ldb::DB::Open(o, path, &m_backup_db);
if (!status.ok() || !m_backup_db)
{
if (boost::filesystem::space(path).available < 1024)
{
LOG(ERROR) << "Not enough available space found on hard drive. Please free some up and then re-run. Bailing.";
BOOST_THROW_EXCEPTION(NotEnoughAvailableSpace());
}
else
{
LOG(ERROR) << status.ToString();
LOG(ERROR) << "Database " << path << "already open. You appear to have another instance of ethereum running. Bailing.";
BOOST_THROW_EXCEPTION(DatabaseAlreadyOpen());
}
}
// reload msg from db
reloadMsg(backup_key_committed, &m_committed_prepare_cache);
}
void PBFT::resetConfig() {
if (!NodeConnManagerSingleton::GetInstance().getAccountType(m_key_pair.pub(), m_account_type)) {
LOG(ERROR) << "resetConfig: can't find myself id, stop sealing";
m_cfg_err = true;
return;
}
auto node_num = NodeConnManagerSingleton::GetInstance().getMinerNum();
if (node_num == 0) {
LOG(ERROR) << "resetConfig: miner_num = 0, stop sealing";
m_cfg_err = true;
return;
}
u256 node_idx;
if (!NodeConnManagerSingleton::GetInstance().getIdx(m_key_pair.pub(), node_idx)) {
//BOOST_THROW_EXCEPTION(PbftInitFailed() << errinfo_comment("NodeID not in cfg"));
LOG(ERROR) << "resetConfig: can't find myself id, stop sealing";
m_cfg_err = true;
return;
}
if (node_num != m_node_num || node_idx != m_node_idx) {
m_node_num = node_num;
m_node_idx = node_idx;
m_f = (m_node_num - 1 ) / 3;
m_prepare_cache.clear();
m_sign_cache.clear();
m_recv_view_change_req.clear();
ConsensusControl::instance().clearAllCache();
m_commitMap.clear();
if (!getMinerList(-1, m_miner_list)) {
LOG(ERROR) << "resetConfig: getMinerList return false";
m_cfg_err = true;
return;
}
if (m_miner_list.size() != m_node_num) {
LOG(ERROR) << "resetConfig: m_miner_list.size=" << m_miner_list.size() << ",m_node_num=" << m_node_num;
m_cfg_err = true;
return;
}
LOG(INFO) << "resetConfig: m_node_idx=" << m_node_idx << ", m_node_num=" << m_node_num;
}
// consensuscontrol init cache
ConsensusControl::instance().resetNodeCache();
m_cfg_err = false;
}
StringHashMap PBFT::jsInfo(BlockHeader const& _bi) const
{
return { { "number", toJS(_bi.number()) }, { "timestamp", toJS(_bi.timestamp()) } };
}
bool PBFT::generateSeal(BlockHeader const& _bi, bytes const& _block_data, u256 &_view)
{
Timer t;
Guard l(m_mutex);
_view = m_view;
if (!broadcastPrepareReq(_bi, _block_data)) {
LOG(ERROR) << "broadcastPrepareReq failed, " << _bi.number() << _bi.hash(WithoutSeal);
return false;
}
LOG(DEBUG) << "generateSeal, blk=" << _bi.number() << ", timecost=" << 1000 * t.elapsed();
return true;
}
bool PBFT::generateCommit(BlockHeader const& _bi, bytes const& _block_data, u256 const& _view)
{
Guard l(m_mutex);
if (_view != m_view) {
LOG(INFO) << "view has changed, generateCommit failed, _view=" << _view << ", m_view=" << m_view;
return false;
}
PrepareReq req;
req.height = _bi.number();
req.view = _view;
req.idx = m_node_idx;
req.timestamp = u256(utcTime());
req.block_hash = _bi.hash(WithoutSeal);
req.sig = signHash(req.block_hash);
req.sig2 = signHash(req.fieldsWithoutBlock());
req.block = _block_data;
if (addPrepareReq(req) && broadcastSignReq(req)) {
checkAndCommit(); // support for issuing block in single node mode (支持单节点可出块)
}
return true;
}
bool PBFT::shouldSeal(Interface*)
{
Guard l(m_mutex);
if (m_cfg_err || m_account_type != EN_ACCOUNT_TYPE_MINER) { // do not issue the block if not find myself in systemcontract config or this node is no a miner (配置中找不到自己或非记账节点就不出块)
return false;
}
std::pair<bool, u256> ret = getLeader();
if (!ret.first) {
return false;
}
if (ret.second != m_node_idx) {
if (auto h = m_host.lock()) {
h512 node_id = h512(0);
if (NodeConnManagerSingleton::GetInstance().getPublicKey(ret.second, node_id) && !h->isConnected(node_id)) {
LOG(ERROR) << "getLeader ret:<" << ret.first << "," << ret.second << ">" << ", need viewchange for disconnected";
m_last_consensus_time = 0;
m_last_sign_time = 0; // set m_last_consensus_time and m_last_sign_time to zero can guarantee "fastviewchange" to work (两个都设置为0，才能保证快速切换)
m_signalled.notify_all();
}
}
return false;
}
// deside whether to replay the committed_prepare package, would usually happen when the 3rd phases(commit phases) not finish (判断是否要把committed_prepare拿出来重放)
if (m_consensus_block_number == m_committed_prepare_cache.height) {
if (m_consensus_block_number != m_raw_prepare_cache.height) {
reHandlePrepareReq(m_committed_prepare_cache);
}
return false;
}
return true;
}
void PBFT::reHandlePrepareReq(PrepareReq const& _req) {
LOG(INFO) << "shouldSeal: found an committed but not saved block, post out again. hash=" << m_committed_prepare_cache.block_hash.abridged();
clearMask(); // to make sure msg will be delivered
PrepareReq req;
req.height = _req.height;
req.view = m_view;
req.idx = m_node_idx;
req.timestamp = u256(utcTime());
req.block_hash = _req.block_hash;
req.sig = signHash(req.block_hash);
req.sig2 = signHash(req.fieldsWithoutBlock());
req.block = _req.block;
LOG(INFO) << "BLOCK_TIMESTAMP_STAT:[" << toString(req.block_hash) << "][" << req.height << "][" << utcTime() << "][" << "broadcastPrepareReq" << "]";
RLPStream ts;
req.streamRLPFields(ts);
broadcastMsg(req.block_hash.hex(), PrepareReqPacket, ts.out());
handlePrepareMsg(m_node_idx, req, true); // 指明是来自自己的Req
}
std::pair<bool, u256> PBFT::getLeader() const {
if (m_cfg_err || m_leader_failed || m_highest_block.number() == Invalid256) {
return std::make_pair(false, Invalid256);
}
return std::make_pair(true, (m_view + m_highest_block.number()) % m_node_num);
}
void PBFT::reportBlock(BlockHeader const & _b, u256 const &) {
Guard l(m_mutex);
auto old_height = m_highest_block.number();
auto old_view = m_view;
m_highest_block = _b;
if (m_highest_block.number() >= m_consensus_block_number) {
m_view = m_to_view = m_change_cycle = 0;
m_leader_failed = false;
m_last_consensus_time = utcTime();
m_consensus_block_number = m_highest_block.number() + 1;
//m_recv_view_change_req.clear();
delViewChange(); // if is's the newest block's viewchange, we can't discard it (如果是最新块的viewchange，不能丢弃)
}
resetConfig();
delCache(m_highest_block.hash(WithoutSeal));
LOG(INFO) << "^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Report: blk=" << m_highest_block.number() << ",hash=" << _b.hash(WithoutSeal).abridged() << ",idx=" << m_highest_block.genIndex() << ", Next: blk=" << m_consensus_block_number;
// onchain log
stringstream ss;
ss << "blk:" << m_highest_block.number().convert_to<string>()
<< " hash:" << _b.hash(WithoutSeal).abridged() << " idx:" << m_highest_block.genIndex().convert_to<string>()
<< " next:" << m_consensus_block_number.convert_to<string>();
PBFTFlowLog(old_height + old_view, ss.str());
}
void PBFT::onPBFTMsg(unsigned _id, std::shared_ptr<p2p::Capability> _peer, RLP const & _r) {
if (_id <= ViewChangeReqPacket) {
NodeID nodeid;
auto session = _peer->session();
if (session && (nodeid = session->id()))
{
u256 idx = u256(0);
if (!NodeConnManagerSingleton::GetInstance().getIdx(nodeid, idx)) {
LOG(ERROR) << "Recv an pbft msg from unknown peer id=" << _id;
return;
}
//handleMsg(_id, idx, _peer->session()->id(), _r[0]);
m_msg_queue.push(PBFTMsgPacket(idx, nodeid, _id, _r[0].data()));
}
} else {
LOG(ERROR) << "Recv an illegal msg, id=" << _id;
}
}
void PBFT::workLoop() {
while (isWorking()) {
try
{
std::pair<bool, PBFTMsgPacket> ret = m_msg_queue.tryPop(5);
if (ret.first) {
handleMsg(ret.second.packet_id, ret.second.node_idx, ret.second.node_id, RLP(ret.second.data));
} else {
std::unique_lock<std::mutex> l(x_signalled);
m_signalled.wait_for(l, chrono::milliseconds(5));
}
checkTimeout();
handleFutureBlock();
collectGarbage();
} catch (Exception &_e) {
LOG(ERROR) << _e.what();
}
}
}
void PBFT::handleMsg(unsigned _id, u256 const& _from, h512 const& _node, RLP const& _r) {
Guard l(m_mutex);
auto now_time = utcTime();
std::string key;
PBFTMsg pbft_msg;
switch (_id) {
case PrepareReqPacket: {
PrepareReq req;
req.populate(_r);
handlePrepareMsg(_from, req);
key = req.block_hash.hex();
pbft_msg = req;
break;
}
case SignReqPacket: {
SignReq req;
req.populate(_r);
handleSignMsg(_from, req);
key = req.sig.hex();
pbft_msg = req;
break;
}
case CommitReqPacket: {
CommitReq req;
req.populate(_r);
handleCommitMsg(_from, req);
key = req.sig.hex();
pbft_msg = req;
break;
}
case ViewChangeReqPacket: {
ViewChangeReq req;
req.populate(_r);
handleViewChangeMsg(_from, req);
key = req.sig.hex() + toJS(req.view);
pbft_msg = req;
break;
}
default: {
LOG(ERROR) << "Recv error msg, id=" << _id;
return;
}
}
bool time_flag = (pbft_msg.timestamp >= now_time) || (now_time - pbft_msg.timestamp < m_view_timeout);
bool height_flag = (pbft_msg.height > m_highest_block.number()) || (m_highest_block.number() - pbft_msg.height < 10);
//LOG(TRACE) << "key=" << key << ",time_flag=" << time_flag << ",height_flag=" << height_flag;
if (key.size() > 0 && time_flag && height_flag) {
std::unordered_set<h512> filter;
filter.insert(_node);
h512 gen_node_id = h512(0);
if (NodeConnManagerSingleton::GetInstance().getPublicKey(pbft_msg.idx, gen_node_id)) {
filter.insert(gen_node_id);
}
broadcastMsg(key, _id, _r.toBytes(), filter);
}
}
void PBFT::changeViewForEmptyBlockWithoutLock(u256 const& _from) {
LOG(INFO) << "changeViewForEmptyBlockWithoutLock m_to_view=" << m_to_view << ", from=" << _from << ", node=" << m_node_idx;
m_last_consensus_time = 0;
m_last_sign_time = 0;
m_change_cycle = 0;
m_empty_block_flag = true;
m_signalled.notify_all();
}
void PBFT::changeViewForEmptyBlockWithLock() {
Guard l(m_mutex);
LOG(INFO) << "changeViewForEmptyBlockWithLock m_to_view=" << m_to_view << ", node=" << m_node_idx;
m_last_consensus_time = 0;
m_last_sign_time = 0;
m_change_cycle = 0;
m_empty_block_flag = true;
m_leader_failed = true; // m_leader_failed would set in checkTimeout, however we set in this place is aim to let the empty block leader not issue a empty block at once (在checkTimeout的时候会设置，但是这里加上的目的是为了让出空块者不会立即再出空块)
m_signalled.notify_all();
}
void PBFT::checkTimeout() {
Timer t;
bool flag = false;
{
Guard l(m_mutex);
auto now_time = utcTime();
auto last_time = std::max(m_last_consensus_time, m_last_sign_time);
auto interval = (uint64_t)(m_view_timeout * std::pow(1.5, m_change_cycle));
if (now_time - last_time >= interval) {
m_leader_failed = true;
m_to_view += 1;
m_change_cycle = std::min(m_change_cycle + 1, (unsigned)kMaxChangeCycle); // prevent overflow (防止溢出)
m_last_consensus_time = now_time;
flag = true;
// remove not used viewchange(not match block number and hash) info in cache (曾经收到的viewchange消息中跟我当前要的不一致就清空)
for (auto iter = m_recv_view_change_req[m_to_view].begin(); iter != m_recv_view_change_req[m_to_view].end();) {
if (iter->second.height < m_highest_block.number()) {
iter = m_recv_view_change_req[m_to_view].erase(iter);
} else if (iter->second.height == m_highest_block.number() && iter->second.block_hash != m_highest_block.hash(WithoutSeal)) { // prevent evil info (防作恶)
iter = m_recv_view_change_req[m_to_view].erase(iter);
} else {
++iter;
}
}
// start viewchange log
if (m_view + 1 == m_to_view)
{
PBFTFlowViewChangeLog(m_highest_block.number() + m_view, " view:" + m_view.convert_to<string>());
}
else
{
STAT_ERROR_MSG_LOGGUARD(STAT_PBFT_VIEWCHANGE_TAG) << "Timeout and ViewChanged!"
<< " m_view=" << m_view << ", m_to_view=" << m_to_view << ", m_change_cycle=" << m_change_cycle;
}
if (!broadcastViewChangeReq()) {
LOG(ERROR) << "broadcastViewChangeReq failed";
return;
}
checkAndChangeView();
LOG(DEBUG) << "checkTimeout timecost=" << t.elapsed() << ", m_view=" << m_view << ",m_to_view=" << m_to_view;
}
}
if (flag && m_onViewChange) {
m_onViewChange();
}
}
void PBFT::handleFutureBlock() {
Guard l(m_mutex);
if (m_future_prepare_cache.second.height == m_consensus_block_number && m_future_prepare_cache.second.view == m_view) {
LOG(INFO) << "handleFurtureBlock, blk=" << m_future_prepare_cache.second.height;
handlePrepareMsg(m_future_prepare_cache.first, m_future_prepare_cache.second);
m_future_prepare_cache = std::make_pair(Invalid256, PrepareReq());
}
}
void PBFT::recvFutureBlock(u256 const& _from, PrepareReq const& _req) {
if (m_future_prepare_cache.second.block_hash != _req.block_hash) {
m_future_prepare_cache = std::make_pair(_from, _req);
LOG(INFO) << "recvFutureBlock, blk=" << _req.height << ",hash=" << _req.block_hash << ",idx=" << _req.idx;
}
}
Signature PBFT::signHash(h256 const & _hash) const {
return dev::sign(m_key_pair.sec(), _hash);
}
bool PBFT::checkSign(u256 const & _idx, h256 const & _hash, Signature const & _sig) const {
Public pub_id;
if (!NodeConnManagerSingleton::GetInstance().getPublicKey(_idx, pub_id)) {
LOG(ERROR) << "Can't find node, idx=" << _idx;
return false;
}
return dev::verify(pub_id, _sig, _hash);
}
bool PBFT::checkSign(PBFTMsg const& _req) const {
Public pub_id;
if (!NodeConnManagerSingleton::GetInstance().getPublicKey(_req.idx, pub_id)) {
LOG(ERROR) << "Can't find node, idx=" << _req.idx;
return false;
}
return dev::verify(pub_id, _req.sig, _req.block_hash) && dev::verify(pub_id, _req.sig2, _req.fieldsWithoutBlock());
}
bool PBFT::broadcastViewChangeReq() {
LOG(INFO) << "Ready to broadcastViewChangeReq, blk=" << m_highest_block.number() << ",view=" << m_view << ",to_view=" << m_to_view << ",m_change_cycle=" << m_change_cycle;
if (m_account_type != EN_ACCOUNT_TYPE_MINER) {
LOG(INFO) << "broadcastViewChangeReq give up for not miner";
return true;
}
ViewChangeReq req;
req.height = m_highest_block.number();
req.view = m_to_view;
req.idx = m_node_idx;
req.timestamp = u256(utcTime());
req.block_hash = m_highest_block.hash(WithoutSeal);
req.sig = signHash(req.block_hash);
req.sig2 = signHash(req.fieldsWithoutBlock());
if (!m_empty_block_flag) {
LOGCOMWARNING << WarningMap.at(ChangeViewWarning) << "|blockNumber:" << req.height << " ChangeView:" << req.view;
m_empty_block_flag = false;
}
RLPStream ts;
req.streamRLPFields(ts);
bool ret = broadcastMsg(req.sig.hex() + toJS(req.view), ViewChangeReqPacket, ts.out());
return ret;
}
bool PBFT::broadcastSignReq(PrepareReq const & _req) {
SignReq sign_req;
sign_req.height = _req.height;
sign_req.view = _req.view;
sign_req.idx = m_node_idx;
sign_req.timestamp = u256(utcTime());
sign_req.block_hash = _req.block_hash;
sign_req.sig = signHash(sign_req.block_hash);
sign_req.sig2 = signHash(sign_req.fieldsWithoutBlock());
RLPStream ts;
sign_req.streamRLPFields(ts);
if (broadcastMsg(sign_req.sig.hex(), SignReqPacket, ts.out())) {
addSignReq(sign_req);
return true;
}
return false;
}
bool PBFT::broadcastCommitReq(PrepareReq const & _req) {
CommitReq commit_req;
commit_req.height = _req.height;
commit_req.view = _req.view;
commit_req.idx = m_node_idx;
commit_req.timestamp = u256(utcTime());
commit_req.block_hash = _req.block_hash;
commit_req.sig = signHash(commit_req.block_hash);
commit_req.sig2 = signHash(commit_req.fieldsWithoutBlock());
RLPStream ts;
commit_req.streamRLPFields(ts);
if (broadcastMsg(commit_req.sig.hex(), CommitReqPacket, ts.out())) {
addCommitReq(commit_req);
return true;
}
return false;
}
bool PBFT::broadcastPrepareReq(BlockHeader const & _bi, bytes const & _block_data) {
PrepareReq req;
req.height = _bi.number();
req.view = m_view;
req.idx = m_node_idx;
req.timestamp = u256(utcTime());
req.block_hash = _bi.hash(WithoutSeal);
req.sig = signHash(req.block_hash);
req.sig2 = signHash(req.fieldsWithoutBlock());
req.block = _block_data;
RLPStream ts;
req.streamRLPFields(ts);
if (broadcastMsg(req.block_hash.hex(), PrepareReqPacket, ts.out())) {
addRawPrepare(req);
return true;
}
return false;
}
bool PBFT::broadcastMsg(std::string const & _key, unsigned _id, bytes const & _data, std::unordered_set<h512> const & _filter) {
if (auto h = m_host.lock()) {
h->foreachPeer([&](shared_ptr<PBFTPeer> _p)
{
NodeID nodeid;
auto session = _p->session();
if (session && (nodeid = session->id()))
{
unsigned account_type = 0;
if ( !NodeConnManagerSingleton::GetInstance().getAccountType(nodeid, account_type)) {
LOG(ERROR) << "Cannot get account type for peer" << nodeid;
return true;
}
if ( _id != ViewChangeReqPacket && account_type != EN_ACCOUNT_TYPE_MINER && !m_bc->chainParams().broadcastToNormalNode) {
return true;
}
if (_filter.count(nodeid)) { // forward the broadcast to other node (转发广播)
this->broadcastMark(_key, _id, _p);
return true;
}
if (this->broadcastFilter(_key, _id, _p)) {
return true;
}
RLPStream ts;
_p->prep(ts, _id, 1).append(_data);
_p->sealAndSend(ts);
this->broadcastMark(_key, _id, _p);
}
return true;
});
return true;
}
return false;
}
bool PBFT::broadcastFilter(std::string const & _key, unsigned _id, shared_ptr<PBFTPeer> _p) {
if (_id == PrepareReqPacket) {
DEV_GUARDED(_p->x_knownPrepare)
return _p->m_knownPrepare.exist(_key);
} else if (_id == SignReqPacket) {
DEV_GUARDED(_p->x_knownSign)
return _p->m_knownSign.exist(_key);
} else if (_id == ViewChangeReqPacket) {
DEV_GUARDED(_p->x_knownViewChange)
return _p->m_knownViewChange.exist(_key);
} else if (_id == CommitReqPacket) {
DEV_GUARDED(_p->x_knownCommit)
return _p->m_knownCommit.exist(_key);
} else {
return true;
}
return true;
}
void PBFT::broadcastMark(std::string const & _key, unsigned _id, shared_ptr<PBFTPeer> _p) {
if (_id == PrepareReqPacket) {
DEV_GUARDED(_p->x_knownPrepare)
{
if (_p->m_knownPrepare.size() > kKnownPrepare) {
_p->m_knownPrepare.pop();
}
_p->m_knownPrepare.push(_key);
}
} else if (_id == SignReqPacket) {
DEV_GUARDED(_p->x_knownSign)
{
if (_p->m_knownSign.size() > kKnownSign) {
_p->m_knownSign.pop();
}
_p->m_knownSign.push(_key);
}
} else if (_id == ViewChangeReqPacket) {
DEV_GUARDED(_p->x_knownViewChange)
{
if (_p->m_knownViewChange.size() > kKnownViewChange) {
_p->m_knownViewChange.pop();
}
_p->m_knownViewChange.push(_key);
}
} else if (_id == CommitReqPacket) {
DEV_GUARDED(_p->x_knownCommit)
{
if (_p->m_knownCommit.size() > kKnownCommit) {
_p->m_knownCommit.pop();
}
_p->m_knownCommit.push(_key);
}
} else {
// do nothing
}
}
void PBFT::clearMask() {
if (auto h = m_host.lock()) {
h->foreachPeer([&](shared_ptr<PBFTPeer> _p)
{
DEV_GUARDED(_p->x_knownPrepare)
_p->m_knownPrepare.clear();
DEV_GUARDED(_p->x_knownSign)
_p->m_knownSign.clear();
DEV_GUARDED(_p->x_knownCommit)
_p->m_knownCommit.clear();
DEV_GUARDED(_p->x_knownViewChange)
_p->m_knownViewChange.clear();
return true;
});
}
}
bool PBFT::isExistPrepare(PrepareReq const & _req) {
return m_raw_prepare_cache.block_hash == _req.block_hash;
}
bool PBFT::isExistSign(SignReq const & _req) {
auto iter = m_sign_cache.find(_req.block_hash);
if (iter == m_sign_cache.end()) {
return false;
}
return iter->second.find(_req.sig.hex()) != iter->second.end();
}
bool PBFT::isExistCommit(CommitReq const & _req) {
auto iter = m_commit_cache.find(_req.block_hash);
if (iter == m_commit_cache.end()) {
return false;
}
return iter->second.find(_req.sig.hex()) != iter->second.end();
}
bool PBFT::isExistViewChange(ViewChangeReq const & _req) {
auto iter = m_recv_view_change_req.find(_req.view);
if (iter == m_recv_view_change_req.end()) {
return false;
}
return iter->second.find(_req.idx) != iter->second.end();
}
void PBFT::handlePrepareMsg(u256 const & _from, PrepareReq const & _req, bool _self) {
Timer t;
ostringstream oss;
oss << "handlePrepareMsg: idx=" << _req.idx << ",view=" << _req.view << ",blk=" << _req.height << ",hash=" << _req.block_hash.abridged() << ",from=" << _from;
VLOG(10) << oss.str() << ", net-time=" << u256(utcTime()) - _req.timestamp;
if (isExistPrepare(_req)) {
VLOG(10) << oss.str() << "Discard an illegal prepare, duplicated";
return;
}
if (!_self && _req.idx == m_node_idx) {
LOG(ERROR) << oss.str() << "Discard an illegal prepare, your own req";
return;
}
if (_req.height < m_consensus_block_number || _req.view < m_view) {
VLOG(10) << oss.str() << "Discard an illegal prepare, lower than your needed blk";
return;
}
if (_req.height > m_consensus_block_number || _req.view > m_view) {
LOG(INFO) << oss.str() << "Recv a future block, wait to be handled later";
recvFutureBlock(_from, _req);
return;
}
addRawPrepare(_req); // must after recvFutureBlock (必须在recvFutureBlock之后)
auto leader = getLeader();
if (!leader.first || _req.idx != leader.second) {
LOG(ERROR) << oss.str() << "Recv an illegal prepare, err leader";
return;
}
if (_req.height == m_committed_prepare_cache.height && _req.block_hash != m_committed_prepare_cache.block_hash) {
LOG(INFO) << oss.str() << "Discard an illegal prepare req, commited but not saved hash=" << m_committed_prepare_cache.block_hash.abridged();
return;
}
if (!checkSign(_req)) {
LOG(ERROR) << oss.str() << "CheckSign failed";
return;
}
LOG(TRACE) << "start exec tx, blk=" << _req.height << ",hash=" << _req.block_hash << ",idx=" << _req.idx << ", time=" << utcTime();
Block outBlock(*m_bc, *m_stateDB);
try {
m_bc->checkBlockValid(_req.block_hash, _req.block, outBlock);
if (outBlock.info().hash(WithoutSeal) != _req.block_hash) { // check whether the block data has been changed (检验块数据是否被更改)
LOG(ERROR) << oss.str() << ", block_hash is not equal to block";
return;
}
m_last_exec_finish_time = utcTime();
}
catch (std::exception &ex) {
LOG(ERROR) << oss.str() << "CheckBlockValid failed" << ex.what();
return;
}
// change leader for empty block (空块切换)
if (outBlock.pending().size() == 0 && m_omit_empty_block) {
changeViewForEmptyBlockWithoutLock(_from);
// for empty block
stringstream ss;
ss << "#empty blk hash:" << _req.block_hash.abridged() << " height:" << _req.height;
PBFTFlowLog(m_highest_block.number() + m_view, ss.str(), 1);
return;
}
// regenerate block data (重新生成block数据)
outBlock.commitToSeal(*m_bc, outBlock.info().extraData());
m_bc->addBlockCache(outBlock, outBlock.info().difficulty());
RLPStream ts;
outBlock.info().streamRLP(ts, WithoutSeal);
if (!outBlock.sealBlock(ts.out())) {
LOG(ERROR) << oss.str() << "Error: sealBlock failed 3";
return;
}
LOG(DEBUG) << "finish exec tx, blk=" << _req.height << ", time=" << utcTime();
// execed log
stringstream ss;
// TODO FLAG2 hash means real hash!
// ss << "hash:" << _req.block_hash.abridged() << " realhash:" << outBlock.info().hash(WithoutSeal).abridged()
// << " height:" << _req.height << " txnum:" << outBlock.pending().size();
ss << "hash:" << outBlock.info().hash(WithoutSeal) << " unexected_hash:" << _req.block_hash.abridged()
<< " height:" << _req.height << " txnum:" << outBlock.pending().size();
PBFTFlowLog(m_highest_block.number() + m_view, ss.str());
// regenerate Prepare package (重新生成Prepare)
PrepareReq req;
req.height = _req.height;
req.view = _req.view;
req.idx = _req.idx;
req.timestamp = u256(utcTime());
req.block_hash = outBlock.info().hash(WithoutSeal);
req.sig = signHash(req.block_hash);
req.sig2 = signHash(req.fieldsWithoutBlock());
req.block = outBlock.blockData();
if (!addPrepareReq(req)) {
LOG(ERROR) << oss.str() << "addPrepare failed";
return;
}
if (m_account_type == EN_ACCOUNT_TYPE_MINER && !broadcastSignReq(req)) {
LOG(ERROR) << oss.str() << "broadcastSignReq failed";
//return;
}
LOG(INFO) << oss.str() << ",real_block_hash=" << outBlock.info().hash(WithoutSeal).abridged() << " success";
checkAndCommit();
LOG(DEBUG) << "handlePrepareMsg, timecost=" << 1000 * t.elapsed();
return;
}
void PBFT::handleSignMsg(u256 const & _from, SignReq const & _req) {
Timer t;
ostringstream oss;
oss << "handleSignMsg: idx=" << _req.idx << ",view=" << _req.view << ",blk=" << _req.height << ",hash=" << _req.block_hash.abridged() << ", from=" << _from;
VLOG(10) << oss.str() << ", net-time=" << u256(utcTime()) - _req.timestamp;
if (isExistSign(_req)) {
VLOG(10) << oss.str() << "Discard an illegal sign, duplicated";
return;
}
if (_req.idx == m_node_idx) {
LOG(ERROR) << oss.str() << "Discard an illegal sign, your own req";
return;
}
if (m_prepare_cache.block_hash != _req.block_hash) {
VLOG(10) << oss.str() << "Recv a sign_req for block which not in prepareCache, preq=" << m_prepare_cache.block_hash.abridged();
bool future_msg = _req.height >= m_consensus_block_number || _req.view > m_view;
if (future_msg && checkSign(_req)) {
addSignReq(_req);
LOG(INFO) << oss.str() << "Cache this sign_req";
}
return;
}
if (m_prepare_cache.view != _req.view) {
LOG(INFO) << oss.str() << "Discard a sign_req which view is not equal, preq.v=" << m_prepare_cache.view;
return;
}
if (!checkSign(_req)) {
LOG(ERROR) << oss.str() << "CheckSign failed";
return;
}
LOG(INFO) << oss.str() << ", success";
addSignReq(_req);
checkAndCommit();
LOG(DEBUG) << "handleSignMsg, timecost=" << 1000 * t.elapsed();
return;
}
void PBFT::handleCommitMsg(u256 const &_from, CommitReq const &_req) {
Timer t;
ostringstream oss;
oss << "handleCommitMsg: idx=" << _req.idx << ",view=" << _req.view << ",blk=" << _req.height << ",hash=" << _req.block_hash.abridged() << ", from=" << _from;
VLOG(10) << oss.str() << ", net-time=" << u256(utcTime()) - _req.timestamp;
if (isExistCommit(_req)) {
VLOG(10) << oss.str() << " Discard an illegal commit, duplicated";
return;
}
if (_req.idx == m_node_idx) {
LOG(ERROR) << oss.str() << " Discard an illegal commit, your own req";
return;
}
if (m_prepare_cache.block_hash != _req.block_hash) {
VLOG(10) << oss.str() << "Recv a commit_req for block which not in prepareCache, preq=" << m_prepare_cache.block_hash.abridged();
bool future_msg = _req.height >= m_consensus_block_number || _req.view > m_view;
if (future_msg && checkSign(_req)) {
addCommitReq(_req);
LOG(INFO) << oss.str() << "Cache this commit_req";
}
return;
}
if (m_prepare_cache.view != _req.view) {
LOG(INFO) << oss.str() << " Discard an illegal commit, view is not equal prepare " << m_prepare_cache.view;
return;
}
if (!checkSign(_req)) {
LOG(ERROR) << oss.str() << "CheckSign failed";
return;
}
LOG(INFO) << oss.str() << ", success";
addCommitReq(_req);
checkAndSave();
LOG(DEBUG) << "handleCommitMsg, timecost=" << 1000 * t.elapsed();
return;
}
void PBFT::handleViewChangeMsg(u256 const & _from, ViewChangeReq const & _req) {
Timer t;
ostringstream oss;
oss << "handleViewChangeMsg: idx=" << _req.idx << ",view=" << _req.view << ",blk=" << _req.height << ",hash=" << _req.block_hash.abridged() << ",from=" << _from;
VLOG(10) << oss.str() << ", net-time=" << u256(utcTime()) - _req.timestamp;
if (isExistViewChange(_req)) {
VLOG(10) << oss.str() << "Discard an illegal viewchange, duplicated";
return;
}
if (_req.idx == m_node_idx) {
LOG(ERROR) << oss.str() << "Discard an illegal viewchange, your own req";
return;
}
// +1 是为了防止触碰到刚好view正在切换的边界条件。因为view落后的节点的view必定是低于(>2)其他整成节点的view
// this is for motivating viewchange, for the envs that if one node crash and other node's view has increased to a large number, than the node restart, it should broadcast a viewchange to other node
// other node receive the low view viewchange, would trigger follow code to motivate the node. +1 is to prevent the case that the view just change, for the reason
// which the new started node' view must fall behind(>2) the excited node
if (_req.view + 1 < m_to_view) {
LOG(INFO) << oss.str() << " send response to node=" << _from << " for motivating viewchange";
broadcastViewChangeReq();
}
if (_req.height < m_highest_block.number() || _req.view <= m_view) {
VLOG(10) << oss.str() << "Discard an illegal viewchange, m_highest_block=" << m_highest_block.number() << ",m_view=" << m_view;
return;
}
if (_req.height == m_highest_block.number() && _req.block_hash != m_highest_block.hash(WithoutSeal) && m_bc->block(_req.block_hash).size() == 0) {
LOG(INFO) << oss.str() << "Discard an illegal viewchange, same height but not hash, chain has been forked, my=" << m_highest_block.hash(WithoutSeal) << ",req=" << _req.block_hash;
return;
}
if (!checkSign(_req)) {
LOG(ERROR) << oss.str() << "CheckSign failed";
return;
}