123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144 |
- // Copyright 2017 The go-ethereum Authors
- // This file is part of the go-ethereum library.
- //
- // The go-ethereum library is free software: you can redistribute it and/or modify
- // it under the terms of the GNU Lesser General Public License as published by
- // the Free Software Foundation, either version 3 of the License, or
- // (at your option) any later version.
- //
- // The go-ethereum library 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 Lesser General Public License for more details.
- //
- // You should have received a copy of the GNU Lesser General Public License
- // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
- package core
- import (
- "time"
- "github.com/ethereum/go-ethereum/consensus/istanbul"
- "github.com/ethereum/go-ethereum/core/types"
- "github.com/ethereum/go-ethereum/log"
- )
- // handleRequest is called by proposer in reaction to `miner.Seal()`
- // (this is the starting of the QBFT validation process)
- // It
- // - validates block proposal is not empty and number correspond to the current sequence
- // - creates and send PRE-PREPARE message to other validators
- func (c *core) handleRequest(request *Request) error {
- logger := c.currentLogger(true, nil)
- logger.Info("QBFT: handle block proposal request")
- if err := c.checkRequestMsg(request); err != nil {
- if err == errInvalidMessage {
- logger.Error("QBFT: invalid request")
- return err
- }
- logger.Error("QBFT: unexpected request", "err", err, "number", request.Proposal.Number(), "hash", request.Proposal.Hash())
- return err
- }
- c.current.pendingRequest = request
- if c.state == StateAcceptRequest {
- c.newRoundMutex.Lock()
- defer c.newRoundMutex.Unlock()
- if c.newRoundTimer != nil {
- c.newRoundTimer.Stop()
- c.newRoundTimer = nil
- }
- delay := time.Duration(0)
- block, ok := request.Proposal.(*types.Block)
- if ok && len(block.Transactions()) == 0 { // if empty block
- config := c.config.GetConfig(c.current.Sequence())
- if config.EmptyBlockPeriod > config.BlockPeriod {
- log.Info("EmptyBlockPeriod detected adding delay to request", "EmptyBlockPeriod", config.EmptyBlockPeriod, "BlockTime", block.Time())
- delay = time.Duration(config.EmptyBlockPeriod-config.BlockPeriod) * time.Second
- }
- }
- c.newRoundTimer = time.AfterFunc(delay, func() {
- c.newRoundTimer = nil
- // Start ROUND-CHANGE timer
- c.newRoundChangeTimer()
- // Send PRE-PREPARE message to other validators
- c.sendPreprepareMsg(request)
- })
- }
- return nil
- }
- // check request state
- // return errInvalidMessage if the message is invalid
- // return errFutureMessage if the sequence of proposal is larger than current sequence
- // return errOldMessage if the sequence of proposal is smaller than current sequence
- func (c *core) checkRequestMsg(request *Request) error {
- if request == nil || request.Proposal == nil {
- return errInvalidMessage
- }
- if c := c.current.sequence.Cmp(request.Proposal.Number()); c > 0 {
- return errOldMessage
- } else if c < 0 {
- return errFutureMessage
- } else {
- return nil
- }
- }
- func (c *core) storeRequestMsg(request *Request) {
- logger := c.currentLogger(true, nil).New("proposal.number", request.Proposal.Number(), "proposal.hash", request.Proposal.Hash())
- logger.Trace("QBFT: store block proposal request for future treatment")
- c.pendingRequestsMu.Lock()
- defer c.pendingRequestsMu.Unlock()
- c.pendingRequests.Push(request, float32(-request.Proposal.Number().Int64()))
- }
- // processPendingRequests is called each time QBFT state is re-initialized
- // it lookup over pending requests and re-input its so they can be treated
- func (c *core) processPendingRequests() {
- c.pendingRequestsMu.Lock()
- defer c.pendingRequestsMu.Unlock()
- logger := c.currentLogger(true, nil)
- logger.Debug("QBFT: lookup for pending block proposal requests")
- for !(c.pendingRequests.Empty()) {
- m, prio := c.pendingRequests.Pop()
- r, ok := m.(*Request)
- if !ok {
- logger.Error("QBFT: malformed pending block proposal request, skip", "msg", m)
- continue
- }
- // Push back if it's a future message
- err := c.checkRequestMsg(r)
- if err != nil {
- if err == errFutureMessage {
- logger.Trace("QBFT: stop looking up for pending block proposal request")
- c.pendingRequests.Push(m, prio)
- break
- }
- logger.Trace("QBFT: skip pending invalid block proposal request", "number", r.Proposal.Number(), "hash", r.Proposal.Hash(), "err", err)
- continue
- }
- logger.Debug("QBFT: found pending block proposal request", "proposal.number", r.Proposal.Number(), "proposal.hash", r.Proposal.Hash())
- go c.sendEvent(istanbul.RequestEvent{
- Proposal: r.Proposal,
- })
- }
- }
|