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mediator_connection.go
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mediator_connection.go
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/*
This file is part of go-palletone.
go-palletone 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.
go-palletone 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 go-palletone. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* @author PalletOne core developer Albert·Gou <dev@pallet.one>
* @date 2018
*/
package ptn
import (
"fmt"
"time"
"github.com/ethereum/go-ethereum/event"
"github.com/palletone/go-palletone/common"
"github.com/palletone/go-palletone/common/log"
"github.com/palletone/go-palletone/common/p2p/discover"
mp "github.com/palletone/go-palletone/consensus/mediatorplugin"
"github.com/palletone/go-palletone/dag/modules"
)
// @author Albert·Gou
type producer interface {
// SubscribeNewProducedUnitEvent should return an event subscription of
// NewProducedUnitEvent and send events to the given channel.
SubscribeNewProducedUnitEvent(ch chan<- mp.NewProducedUnitEvent) event.Subscription
// AddToTBLSSignBufs is to TBLS sign the unit
AddToTBLSSignBufs(newHash common.Hash)
SubscribeSigShareEvent(ch chan<- mp.SigShareEvent) event.Subscription
AddToTBLSRecoverBuf(sigShare *mp.SigShareEvent, header *modules.Header)
SubscribeVSSDealEvent(ch chan<- mp.VSSDealEvent) event.Subscription
AddToDealBuf(deal *mp.VSSDealEvent)
SubscribeVSSResponseEvent(ch chan<- mp.VSSResponseEvent) event.Subscription
AddToResponseBuf(resp *mp.VSSResponseEvent)
LocalHaveActiveMediator() bool
LocalHavePrecedingMediator() bool
SubscribeGroupSigEvent(ch chan<- mp.GroupSigEvent) event.Subscription
UpdateMediatorsDKG(isRenew bool)
IsLocalMediator(add common.Address) bool
ClearGroupSignBufs(stableUnit *modules.Unit)
}
func (pm *ProtocolManager) activeMediatorsUpdatedEventRecvLoop() {
log.Debugf("activeMediatorsUpdatedEventRecvLoop")
for {
select {
case event := <-pm.activeMediatorsUpdatedCh:
go pm.switchMediatorConnect(event.IsChanged)
// Err() channel will be closed when unsubscribing.
case <-pm.activeMediatorsUpdatedSub.Err():
return
}
}
}
func (pm *ProtocolManager) unstableRepositoryUpdatedRecvLoop() {
log.Debugf("unstableRepositoryUpdatedRecvLoop")
for {
select {
case <-pm.unstableRepositoryUpdatedCh:
log.Debugf("receive UnstableRepositoryUpdatedEvent")
pm.activeMediatorsUpdatedSub = pm.dag.SubscribeActiveMediatorsUpdatedEvent(pm.activeMediatorsUpdatedCh)
// Err() channel will be closed when unsubscribing.
case <-pm.unstableRepositoryUpdatedSub.Err():
return
}
}
}
func (pm *ProtocolManager) saveStableUnitRecvLoop() {
log.Debugf("saveStableUnitRecvLoop")
for {
select {
case event := <-pm.saveStableUnitCh:
log.Debugf("receive saveStableUnitEvent[%s]", event.Unit.DisplayId())
txs := event.Unit.Transactions()
if pm.enableGasFee {
txs = event.Unit.TransactionsWithoutCoinbase()
}
if len(txs) > 0 {
log.DebugDynamic(func() string {
return fmt.Sprintf("discard txs %#x from txpool by stable unit[%s]",
event.Unit.TxHashes(), event.Unit.DisplayId())
})
err := pm.txpool.DiscardTxs(txs)
if err != nil {
log.Error(err.Error())
}
}
go pm.producer.ClearGroupSignBufs(event.Unit)
go pm.delayDiscPrecedingMediator(event.Unit)
// Err() channel will be closed when unsubscribing.
case <-pm.saveStableUnitSub.Err():
return
}
}
}
func (pm *ProtocolManager) saveUnitRecvLoop() {
for {
select {
case u := <-pm.saveUnitCh:
log.Debugf("SubscribeSaveUnitEvent received unit:%s", u.Unit.DisplayId())
txs := u.Unit.Transactions()
if pm.enableGasFee {
txs = u.Unit.TransactionsWithoutCoinbase()
}
if len(txs) > 0 {
err := pm.txpool.SetPendingTxs(u.Unit.Hash(), u.Unit.NumberU64(), txs) //UpdateTxStatusPacked
if err != nil {
log.Error(err.Error())
}
}
case err := <-pm.saveUnitSub.Err():
if err != nil {
log.Error(err.Error())
}
return
}
}
}
func (pm *ProtocolManager) rollbackUnitRecvLoop() {
for {
select {
case u := <-pm.rollbackUnitCh:
log.Infof("SubscribeRollbackUnitEvent received unit:%s", u.Unit.DisplayId())
txs := u.Unit.Transactions()
if pm.enableGasFee {
txs = u.Unit.TransactionsWithoutCoinbase()
}
if len(txs) > 0 {
err := pm.txpool.ResetPendingTxs(txs) //UpdateTxStatusUnpacked
if err != nil {
log.Error(err.Error())
}
}
case err := <-pm.rollbackUnitSub.Err():
if err != nil {
log.Error(err.Error())
}
return
}
}
}
func (pm *ProtocolManager) switchMediatorConnect(isChanged bool) {
log.Debug("switchMediatorConnect", "isChanged", isChanged)
dag := pm.dag
// 防止重复接收消息
if !(dag.LastMaintenanceTime() > pm.lastMaintenanceTime) {
return
}
// 若干数据还没同步完成,则忽略本次切换,继续同步
if !dag.IsSynced(true) {
log.Debugf(errStr)
return
}
headNum := dag.HeadUnitNum()
stableNum := dag.StableUnitNum()
isRenew := true
// 如果 活跃mediator没有发生变化,并且群签名功能已生效,则不再重新做vss协议
if !isChanged && !(headNum-stableNum > 1) && stableNum != 0 {
isRenew = false
}
// 更新相关标记
pm.lastMaintenanceTime = pm.dag.LastMaintenanceTime()
if !isRenew {
// 和新的活跃mediator节点相连
go pm.connectWitchActiveMediators()
}
// 检查是否连接和同步,并更新DKG和VSS
//go pm.checkConnectedAndSynced()
go pm.producer.UpdateMediatorsDKG(isRenew)
// 在其他地方当unit稳定后再关闭连接
//// 延迟关闭和旧活跃mediator节点的连接
//go pm.delayDiscPrecedingMediator()
}
func (pm *ProtocolManager) connectWitchActiveMediators() {
// 判断本节点是否是活跃mediator
log.Debugf("to connected with all active mediator nodes")
if !pm.producer.LocalHaveActiveMediator() {
return
}
// 和其他活跃mediator节点相连
peers := pm.dag.GetActiveMediatorNodes()
for _, peer := range peers {
// 仅当不是本节点,才做处理
if peer.ID != pm.srvr.Self().ID {
pm.srvr.AddTrustedPeer(peer) // 加入Trusted列表
pm.srvr.AddPeer(peer) // 建立连接
}
}
// 更新相关标记
pm.isConnectedNewMediator = true
}
/*func (pm *ProtocolManager) checkConnectedAndSynced() {
log.Debugf("check if it is connected to all active mediator peers")
if !pm.producer.LocalHaveActiveMediator() {
return
}
// 2. 是否和所有其他活跃mediator节点相连完成
checkFn := func() bool {
nodes := pm.dag.GetActiveMediatorNodes()
for id, node := range nodes {
// 仅当不是本节点,并还未连接完成时,或者未同步,返回false
if node.ID == pm.srvr.Self().ID {
continue
}
peer := pm.peers.Peer(id)
if peer == nil {
return false
}
}
log.Debugf("connected with all active mediator peers")
return true
}
// 3. 更新DKG和VSS
processFn := func() {
go pm.producer.UpdateMediatorsDKG(true)
}
// 1. 设置Ticker, 每隔一段时间检查一次
checkTick := time.NewTicker(200 * time.Millisecond)
defer checkTick.Stop()
// 设置检查期限,防止死循环
expiration := pm.dag.UnitIrreversibleTime()
killLoop := time.NewTimer(expiration)
for {
select {
case <-pm.quitSync:
return
case <-killLoop.C:
return
case <-checkTick.C:
if checkFn() {
processFn()
return
}
}
}
}*/
func (pm *ProtocolManager) delayDiscPrecedingMediator(stableUnit *modules.Unit) {
if !pm.isConnectedNewMediator {
return
}
if !(stableUnit.Timestamp() > pm.lastMaintenanceTime) {
return
}
// 1. 判断当前节点是否是上一届活跃mediator
if !pm.producer.LocalHavePrecedingMediator() {
return
}
// 如果当前节点不是活跃mediator,则删除全部之前的mediator节点
isActive := pm.producer.LocalHaveActiveMediator()
// 2. 统计出需要断开连接的mediator节点
delayDiscNodes := make(map[string]*discover.Node)
activePeers := pm.dag.GetActiveMediatorNodes()
precedingPeers := pm.dag.GetPrecedingMediatorNodes()
for id, peer := range precedingPeers {
// 仅当上一届mediator 不是本届活跃mediator,或者本节点不是活跃mediator
if _, ok := activePeers[id]; !isActive || !ok /*&& pm.peers.Peer(id) != nil*/ {
delayDiscNodes[id] = peer
}
}
disconnectFn := func() {
log.Debugf("disconnect with preceding mediator nodes")
for _, peer := range delayDiscNodes {
pm.srvr.RemoveTrustedPeer(peer)
}
}
//// 3. 设置定时器延迟 将上一届的活跃mediator节点从Trusted列表中移除
//expiration := pm.dag.UnitIrreversibleTime()
//delayDisc := time.NewTimer(expiration)
//
//select {
//case <-pm.quitSync:
// return
//case <-delayDisc.C:
// disconnectFn()
//}
disconnectFn()
pm.isConnectedNewMediator = false
}
func (p *peer) MarkVSSDeal(hash common.Hash) {
for p.knownVSSDeal.Cardinality() >= maxKnownVSSDeal {
p.knownVSSDeal.Pop()
}
p.knownVSSDeal.Add(hash)
}
func (pm *ProtocolManager) BroadcastVSSDeal(deal *mp.VSSDealEvent) {
now := uint64(time.Now().Unix())
if now > deal.Deadline {
return
}
peers := pm.peers.PeersWithoutVSSDeal(deal.Hash())
for _, peer := range peers {
go peer.SendVSSDeal(deal)
}
return
}
func (ps *peerSet) PeersWithoutVSSDeal(hash common.Hash) []*peer {
ps.lock.RLock()
defer ps.lock.RUnlock()
list := make([]*peer, 0, len(ps.peers))
for _, p := range ps.peers {
if !p.knownVSSDeal.Contains(hash) {
list = append(list, p)
}
}
return list
}
func (p *peer) MarkVSSResponse(hash common.Hash) {
for p.knownVSSResponse.Cardinality() >= maxKnownVSSResponse {
p.knownVSSResponse.Pop()
}
p.knownVSSResponse.Add(hash)
}
func (pm *ProtocolManager) BroadcastVSSResponse(deal *mp.VSSResponseEvent) {
now := uint64(time.Now().Unix())
if now > deal.Deadline {
return
}
peers := pm.peers.PeersWithoutVSSResponse(deal.Hash())
for _, peer := range peers {
go peer.SendVSSResponse(deal)
}
return
}
func (ps *peerSet) PeersWithoutVSSResponse(hash common.Hash) []*peer {
ps.lock.RLock()
defer ps.lock.RUnlock()
list := make([]*peer, 0, len(ps.peers))
for _, p := range ps.peers {
if !p.knownVSSResponse.Contains(hash) {
list = append(list, p)
}
}
return list
}
func (p *peer) MarkSigShare(hash common.Hash) {
for p.knownSigShare.Cardinality() >= maxKnownSigShare {
p.knownSigShare.Pop()
}
p.knownSigShare.Add(hash)
}
func (pm *ProtocolManager) BroadcastSigShare(sigShare *mp.SigShareEvent) {
//now := uint64(time.Now().Unix())
//if now > sigShare.Deadline {
// return
//}
peers := pm.peers.PeersWithoutSigShare(sigShare.UnitHash)
for _, peer := range peers {
go peer.SendSigShare(sigShare)
}
return
}
func (ps *peerSet) PeersWithoutSigShare(hash common.Hash) []*peer {
ps.lock.RLock()
defer ps.lock.RUnlock()
list := make([]*peer, 0, len(ps.peers))
for _, p := range ps.peers {
if !p.knownSigShare.Contains(hash) {
list = append(list, p)
}
}
return list
}