mirror of https://github.com/poanetwork/quorum.git
113 lines
2.9 KiB
Go
113 lines
2.9 KiB
Go
// Copyright 2017 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser 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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//
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// The go-ethereum library 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 Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package backend
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import (
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"errors"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/consensus"
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"github.com/ethereum/go-ethereum/consensus/istanbul"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/p2p"
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lru "github.com/hashicorp/golang-lru"
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)
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const (
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istanbulMsg = 0x11
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)
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var (
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// errDecodeFailed is returned when decode message fails
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errDecodeFailed = errors.New("fail to decode istanbul message")
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)
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// Protocol implements consensus.Engine.Protocol
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func (sb *backend) Protocol() consensus.Protocol {
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return consensus.Protocol{
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Name: "istanbul",
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Versions: []uint{64},
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Lengths: []uint64{18},
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}
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}
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// HandleMsg implements consensus.Handler.HandleMsg
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func (sb *backend) HandleMsg(addr common.Address, msg p2p.Msg) (bool, error) {
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sb.coreMu.Lock()
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defer sb.coreMu.Unlock()
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if msg.Code == istanbulMsg {
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if !sb.coreStarted {
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return true, istanbul.ErrStoppedEngine
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}
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var data []byte
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if err := msg.Decode(&data); err != nil {
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return true, errDecodeFailed
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}
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hash := istanbul.RLPHash(data)
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// Mark peer's message
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ms, ok := sb.recentMessages.Get(addr)
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var m *lru.ARCCache
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if ok {
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m, _ = ms.(*lru.ARCCache)
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} else {
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m, _ = lru.NewARC(inmemoryMessages)
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sb.recentMessages.Add(addr, m)
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}
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m.Add(hash, true)
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// Mark self known message
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if _, ok := sb.knownMessages.Get(hash); ok {
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return true, nil
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}
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sb.knownMessages.Add(hash, true)
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go sb.istanbulEventMux.Post(istanbul.MessageEvent{
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Payload: data,
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})
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return true, nil
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}
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return false, nil
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}
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// SetBroadcaster implements consensus.Handler.SetBroadcaster
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func (sb *backend) SetBroadcaster(broadcaster consensus.Broadcaster) {
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sb.broadcaster = broadcaster
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}
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func (sb *backend) NewChainHead(block *types.Block) error {
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sb.coreMu.Lock()
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defer sb.coreMu.Unlock()
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if !sb.coreStarted {
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return istanbul.ErrStoppedEngine
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}
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p, err := sb.Author(block.Header())
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if err != nil {
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sb.logger.Error("Failed to get block proposer", "err", err)
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return err
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}
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go sb.istanbulEventMux.Post(istanbul.FinalCommittedEvent{
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Proposal: block,
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Proposer: p,
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})
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return nil
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}
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