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287 lines
6.9 KiB
287 lines
6.9 KiB
package consensus
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import (
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"bufio"
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"errors"
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"fmt"
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"os"
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"reflect"
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"strconv"
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"strings"
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"time"
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. "github.com/tendermint/go-common"
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"github.com/tendermint/go-wire"
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sm "github.com/tendermint/tendermint/state"
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"github.com/tendermint/tendermint/types"
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)
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//--------------------------------------------------------
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// types and functions for savings consensus messages
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type ConsensusLogMessage struct {
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Msg ConsensusLogMessageInterface `json:"msg"`
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}
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type ConsensusLogMessageInterface interface{}
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var _ = wire.RegisterInterface(
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struct{ ConsensusLogMessageInterface }{},
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wire.ConcreteType{&types.EventDataRoundState{}, 0x01},
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wire.ConcreteType{msgInfo{}, 0x02},
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wire.ConcreteType{timeoutInfo{}, 0x03},
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)
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// called in newStep and for each pass in receiveRoutine
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func (cs *ConsensusState) saveMsg(msg ConsensusLogMessageInterface) {
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if cs.msgLogFP != nil {
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var n int
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var err error
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wire.WriteJSON(ConsensusLogMessage{msg}, cs.msgLogFP, &n, &err)
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wire.WriteTo([]byte("\n"), cs.msgLogFP, &n, &err) // one message per line
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if err != nil {
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log.Error("Error writing to consensus message log file", "err", err, "msg", msg)
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}
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}
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}
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// Open file to log all consensus messages and timeouts for deterministic accountability
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func (cs *ConsensusState) OpenFileForMessageLog(file string) (err error) {
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cs.mtx.Lock()
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defer cs.mtx.Unlock()
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cs.msgLogFP, err = os.OpenFile(file, os.O_WRONLY|os.O_APPEND|os.O_CREATE, 0666)
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return err
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}
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//--------------------------------------------------------
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// replay messages
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// Interactive playback
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func (cs ConsensusState) ReplayConsole(file string) error {
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return cs.replay(file, true)
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}
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// Full playback, with tests
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func (cs ConsensusState) ReplayMessages(file string) error {
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return cs.replay(file, false)
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}
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type playback struct {
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cs *ConsensusState
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file string
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fp *os.File
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scanner *bufio.Scanner
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newStepCh chan interface{}
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genesisState *sm.State
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count int
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}
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func newPlayback(file string, fp *os.File, cs *ConsensusState, ch chan interface{}, genState *sm.State) *playback {
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return &playback{
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cs: cs,
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file: file,
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newStepCh: ch,
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genesisState: genState,
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fp: fp,
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scanner: bufio.NewScanner(fp),
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}
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}
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func (pb *playback) replayReset(count int) error {
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pb.cs.Stop()
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newCs := NewConsensusState(pb.genesisState.Copy(), pb.cs.proxyAppCtx, pb.cs.blockStore, pb.cs.mempool)
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newCs.SetEventSwitch(pb.cs.evsw)
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// we ensure all new step events are regenerated as expected
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pb.newStepCh = newCs.evsw.SubscribeToEvent("replay-test", types.EventStringNewRoundStep(), 1)
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newCs.BaseService.OnStart()
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newCs.startRoutines(0)
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pb.fp.Close()
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fp, err := os.OpenFile(pb.file, os.O_RDONLY, 0666)
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if err != nil {
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return err
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}
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pb.fp = fp
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pb.scanner = bufio.NewScanner(fp)
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count = pb.count - count
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log.Notice(Fmt("Reseting from %d to %d", pb.count, count))
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pb.count = 0
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pb.cs = newCs
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for i := 0; pb.scanner.Scan() && i < count; i++ {
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if err := pb.readReplayMessage(); err != nil {
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return err
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}
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pb.count += 1
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}
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return nil
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}
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func (cs *ConsensusState) replay(file string, console bool) error {
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if cs.IsRunning() {
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return errors.New("cs is already running, cannot replay")
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}
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cs.BaseService.OnStart()
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cs.startRoutines(0)
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if cs.msgLogFP != nil {
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cs.msgLogFP.Close()
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cs.msgLogFP = nil
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}
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// we ensure all new step events are regenerated as expected
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newStepCh := cs.evsw.SubscribeToEvent("replay-test", types.EventStringNewRoundStep(), 1)
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fp, err := os.OpenFile(file, os.O_RDONLY, 0666)
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if err != nil {
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return err
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}
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pb := newPlayback(file, fp, cs, newStepCh, cs.state.Copy())
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defer pb.fp.Close()
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var nextN int // apply N msgs in a row
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for pb.scanner.Scan() {
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if nextN == 0 && console {
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nextN = pb.replayConsoleLoop()
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}
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if err := pb.readReplayMessage(); err != nil {
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return err
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}
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if nextN > 0 {
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nextN -= 1
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}
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pb.count += 1
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}
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return nil
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}
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func (pb *playback) replayConsoleLoop() int {
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for {
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fmt.Printf("> ")
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bufReader := bufio.NewReader(os.Stdin)
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line, more, err := bufReader.ReadLine()
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if more {
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Exit("input is too long")
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} else if err != nil {
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Exit(err.Error())
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}
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tokens := strings.Split(string(line), " ")
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if len(tokens) == 0 {
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continue
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}
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switch tokens[0] {
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case "next":
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// "next" -> replay next message
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// "next N" -> replay next N messages
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if len(tokens) == 1 {
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return 0
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} else {
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i, err := strconv.Atoi(tokens[1])
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if err != nil {
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fmt.Println("next takes an integer argument")
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} else {
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return i
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}
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}
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case "back":
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// "back" -> go back one message
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// "back N" -> go back N messages
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// NOTE: "back" is not supported in the state machine design,
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// so we restart to do this (expensive ...)
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if len(tokens) == 1 {
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pb.replayReset(1)
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} else {
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i, err := strconv.Atoi(tokens[1])
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if err != nil {
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fmt.Println("back takes an integer argument")
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} else if i > pb.count {
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fmt.Printf("argument to back must not be larger than the current count (%d)\n", pb.count)
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} else {
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pb.replayReset(i)
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}
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}
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case "rs":
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// "rs" -> print entire round state
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// "rs short" -> print height/round/step
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// "rs <field>" -> print another field of the round state
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rs := pb.cs.RoundState
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if len(tokens) == 1 {
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fmt.Println(rs)
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} else {
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switch tokens[1] {
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case "short":
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fmt.Printf("%v/%v/%v\n", rs.Height, rs.Round, rs.Step)
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case "validators":
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fmt.Println(rs.Validators)
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case "proposal":
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fmt.Println(rs.Proposal)
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case "proposal_block":
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fmt.Printf("%v %v\n", rs.ProposalBlockParts.StringShort(), rs.ProposalBlock.StringShort())
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case "locked_round":
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fmt.Println(rs.LockedRound)
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case "locked_block":
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fmt.Printf("%v %v\n", rs.LockedBlockParts.StringShort(), rs.LockedBlock.StringShort())
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case "votes":
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fmt.Println(rs.Votes.StringIndented(" "))
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default:
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fmt.Println("Unknown option", tokens[1])
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}
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}
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}
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}
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return 0
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}
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func (pb *playback) readReplayMessage() error {
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var err error
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var msg ConsensusLogMessage
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wire.ReadJSON(&msg, pb.scanner.Bytes(), &err)
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if err != nil {
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return fmt.Errorf("Error reading json data: %v", err)
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}
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log.Notice("Replaying message", "type", reflect.TypeOf(msg.Msg), "msg", msg.Msg)
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switch m := msg.Msg.(type) {
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case *types.EventDataRoundState:
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// these are playback checks
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ticker := time.After(time.Second * 2)
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select {
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case mi := <-pb.newStepCh:
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m2 := mi.(*types.EventDataRoundState)
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if m.Height != m2.Height || m.Round != m2.Round || m.Step != m2.Step {
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return fmt.Errorf("RoundState mismatch. Got %v; Expected %v", m2, m)
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}
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case <-ticker:
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return fmt.Errorf("Failed to read off newStepCh")
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}
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case msgInfo:
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// internal or from peer
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if m.PeerKey == "" {
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pb.cs.internalMsgQueue <- m
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} else {
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pb.cs.peerMsgQueue <- m
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}
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case timeoutInfo:
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pb.cs.tockChan <- m
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default:
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return fmt.Errorf("Unknown ConsensusLogMessage type: %v", reflect.TypeOf(msg.Msg))
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}
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return nil
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}
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