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562 lines
18 KiB
562 lines
18 KiB
package consensus
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import (
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"context"
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"fmt"
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"os"
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"path"
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"sync"
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"testing"
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"time"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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dbm "github.com/tendermint/tm-db"
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abciclient "github.com/tendermint/tendermint/abci/client"
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"github.com/tendermint/tendermint/abci/example/kvstore"
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abci "github.com/tendermint/tendermint/abci/types"
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"github.com/tendermint/tendermint/internal/eventbus"
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"github.com/tendermint/tendermint/internal/evidence"
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"github.com/tendermint/tendermint/internal/mempool"
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"github.com/tendermint/tendermint/internal/p2p"
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sm "github.com/tendermint/tendermint/internal/state"
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"github.com/tendermint/tendermint/internal/store"
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"github.com/tendermint/tendermint/internal/test/factory"
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"github.com/tendermint/tendermint/libs/log"
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tmtime "github.com/tendermint/tendermint/libs/time"
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tmcons "github.com/tendermint/tendermint/proto/tendermint/consensus"
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tmproto "github.com/tendermint/tendermint/proto/tendermint/types"
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"github.com/tendermint/tendermint/types"
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)
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// Byzantine node sends two different prevotes (nil and blockID) to the same
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// validator.
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func TestByzantinePrevoteEquivocation(t *testing.T) {
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// empirically, this test either passes in <1s or hits some
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// kind of deadlock and hit the larger timeout. This timeout
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// can be extended a bunch if needed, but it's good to avoid
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// falling back to a much coarser timeout
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ctx, cancel := context.WithTimeout(context.Background(), 20*time.Second)
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defer cancel()
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config := configSetup(t)
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nValidators := 4
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prevoteHeight := int64(2)
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testName := "consensus_byzantine_test"
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tickerFunc := newMockTickerFunc(true)
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valSet, privVals := factory.ValidatorSet(ctx, t, nValidators, 30)
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genDoc := factory.GenesisDoc(config, time.Now(), valSet.Validators, nil)
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states := make([]*State, nValidators)
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for i := 0; i < nValidators; i++ {
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func() {
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logger := consensusLogger().With("test", "byzantine", "validator", i)
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stateDB := dbm.NewMemDB() // each state needs its own db
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stateStore := sm.NewStore(stateDB)
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state, err := sm.MakeGenesisState(genDoc)
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require.NoError(t, err)
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require.NoError(t, stateStore.Save(state))
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thisConfig, err := ResetConfig(t.TempDir(), fmt.Sprintf("%s_%d", testName, i))
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require.NoError(t, err)
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defer os.RemoveAll(thisConfig.RootDir)
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ensureDir(t, path.Dir(thisConfig.Consensus.WalFile()), 0700) // dir for wal
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app := kvstore.NewApplication()
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vals := types.TM2PB.ValidatorUpdates(state.Validators)
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app.InitChain(abci.RequestInitChain{Validators: vals})
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blockDB := dbm.NewMemDB()
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blockStore := store.NewBlockStore(blockDB)
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// one for mempool, one for consensus
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proxyAppConnMem := abciclient.NewLocalClient(logger, app)
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proxyAppConnCon := abciclient.NewLocalClient(logger, app)
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// Make Mempool
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mempool := mempool.NewTxMempool(
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log.TestingLogger().With("module", "mempool"),
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thisConfig.Mempool,
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proxyAppConnMem,
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)
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if thisConfig.Consensus.WaitForTxs() {
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mempool.EnableTxsAvailable()
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}
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eventBus := eventbus.NewDefault(log.TestingLogger().With("module", "events"))
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require.NoError(t, eventBus.Start(ctx))
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// Make a full instance of the evidence pool
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evidenceDB := dbm.NewMemDB()
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evpool := evidence.NewPool(logger.With("module", "evidence"), evidenceDB, stateStore, blockStore, evidence.NopMetrics(), eventBus)
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// Make State
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blockExec := sm.NewBlockExecutor(stateStore, log.TestingLogger(), proxyAppConnCon, mempool, evpool, blockStore, eventBus)
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cs, err := NewState(ctx, logger, thisConfig.Consensus, stateStore, blockExec, blockStore, mempool, evpool, eventBus)
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require.NoError(t, err)
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// set private validator
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pv := privVals[i]
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cs.SetPrivValidator(ctx, pv)
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cs.SetTimeoutTicker(tickerFunc())
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states[i] = cs
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}()
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}
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rts := setup(ctx, t, nValidators, states, 512) // buffer must be large enough to not deadlock
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var bzNodeID types.NodeID
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// Set the first state's reactor as the dedicated byzantine reactor and grab
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// the NodeID that corresponds to the state so we can reference the reactor.
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bzNodeState := states[0]
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for nID, s := range rts.states {
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if s == bzNodeState {
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bzNodeID = nID
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break
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}
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}
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bzReactor := rts.reactors[bzNodeID]
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// alter prevote so that the byzantine node double votes when height is 2
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bzNodeState.doPrevote = func(ctx context.Context, height int64, round int32) {
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// allow first height to happen normally so that byzantine validator is no longer proposer
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if height == prevoteHeight {
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prevote1, err := bzNodeState.signVote(ctx,
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tmproto.PrevoteType,
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bzNodeState.ProposalBlock.Hash(),
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bzNodeState.ProposalBlockParts.Header(),
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)
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require.NoError(t, err)
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prevote2, err := bzNodeState.signVote(ctx, tmproto.PrevoteType, nil, types.PartSetHeader{})
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require.NoError(t, err)
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// send two votes to all peers (1st to one half, 2nd to another half)
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i := 0
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for _, ps := range bzReactor.peers {
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if i < len(bzReactor.peers)/2 {
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require.NoError(t, bzReactor.voteCh.Send(ctx,
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p2p.Envelope{
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To: ps.peerID,
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Message: &tmcons.Vote{
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Vote: prevote1.ToProto(),
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},
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}))
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} else {
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require.NoError(t, bzReactor.voteCh.Send(ctx,
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p2p.Envelope{
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To: ps.peerID,
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Message: &tmcons.Vote{
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Vote: prevote2.ToProto(),
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},
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}))
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}
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i++
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}
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} else {
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bzNodeState.defaultDoPrevote(ctx, height, round)
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}
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}
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// Introducing a lazy proposer means that the time of the block committed is
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// different to the timestamp that the other nodes have. This tests to ensure
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// that the evidence that finally gets proposed will have a valid timestamp.
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// lazyProposer := states[1]
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lazyNodeState := states[1]
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lazyNodeState.decideProposal = func(ctx context.Context, height int64, round int32) {
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require.NotNil(t, lazyNodeState.privValidator)
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var commit *types.Commit
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switch {
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case lazyNodeState.Height == lazyNodeState.state.InitialHeight:
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// We're creating a proposal for the first block.
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// The commit is empty, but not nil.
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commit = types.NewCommit(0, 0, types.BlockID{}, nil)
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case lazyNodeState.LastCommit.HasTwoThirdsMajority():
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// Make the commit from LastCommit
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commit = lazyNodeState.LastCommit.MakeCommit()
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default: // This shouldn't happen.
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lazyNodeState.logger.Error("enterPropose: Cannot propose anything: No commit for the previous block")
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return
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}
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// omit the last signature in the commit
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commit.Signatures[len(commit.Signatures)-1] = types.NewCommitSigAbsent()
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if lazyNodeState.privValidatorPubKey == nil {
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// If this node is a validator & proposer in the current round, it will
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// miss the opportunity to create a block.
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lazyNodeState.logger.Error("enterPropose", "err", errPubKeyIsNotSet)
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return
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}
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proposerAddr := lazyNodeState.privValidatorPubKey.Address()
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block, err := lazyNodeState.blockExec.CreateProposalBlock(
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ctx, lazyNodeState.Height, lazyNodeState.state, commit, proposerAddr, nil)
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require.NoError(t, err)
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blockParts, err := block.MakePartSet(types.BlockPartSizeBytes)
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require.NoError(t, err)
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// Flush the WAL. Otherwise, we may not recompute the same proposal to sign,
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// and the privValidator will refuse to sign anything.
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if err := lazyNodeState.wal.FlushAndSync(); err != nil {
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lazyNodeState.logger.Error("error flushing to disk")
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}
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// Make proposal
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propBlockID := types.BlockID{Hash: block.Hash(), PartSetHeader: blockParts.Header()}
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proposal := types.NewProposal(height, round, lazyNodeState.ValidRound, propBlockID, block.Header.Time)
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p := proposal.ToProto()
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if err := lazyNodeState.privValidator.SignProposal(ctx, lazyNodeState.state.ChainID, p); err == nil {
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proposal.Signature = p.Signature
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// send proposal and block parts on internal msg queue
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lazyNodeState.sendInternalMessage(ctx, msgInfo{&ProposalMessage{proposal}, "", tmtime.Now()})
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for i := 0; i < int(blockParts.Total()); i++ {
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part := blockParts.GetPart(i)
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lazyNodeState.sendInternalMessage(ctx, msgInfo{&BlockPartMessage{
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lazyNodeState.Height, lazyNodeState.Round, part,
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}, "", tmtime.Now()})
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}
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} else if !lazyNodeState.replayMode {
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lazyNodeState.logger.Error("enterPropose: Error signing proposal", "height", height, "round", round, "err", err)
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}
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}
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for _, reactor := range rts.reactors {
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reactor.SwitchToConsensus(ctx, reactor.state.GetState(), false)
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}
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// Evidence should be submitted and committed at the third height but
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// we will check the first six just in case
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evidenceFromEachValidator := make([]types.Evidence, nValidators)
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var wg sync.WaitGroup
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i := 0
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subctx, subcancel := context.WithCancel(ctx)
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defer subcancel()
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for _, sub := range rts.subs {
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wg.Add(1)
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go func(j int, s eventbus.Subscription) {
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defer wg.Done()
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for {
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if subctx.Err() != nil {
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return
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}
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msg, err := s.Next(subctx)
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if subctx.Err() != nil {
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return
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}
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if err != nil {
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t.Errorf("waiting for subscription: %v", err)
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subcancel()
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return
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}
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require.NotNil(t, msg)
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block := msg.Data().(types.EventDataNewBlock).Block
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if len(block.Evidence) != 0 {
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evidenceFromEachValidator[j] = block.Evidence[0]
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return
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}
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}
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}(i, sub)
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i++
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}
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wg.Wait()
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// don't run more assertions if we've encountered a timeout
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select {
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case <-subctx.Done():
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t.Fatal("encountered timeout")
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default:
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}
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pubkey, err := bzNodeState.privValidator.GetPubKey(ctx)
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require.NoError(t, err)
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for idx, ev := range evidenceFromEachValidator {
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require.NotNil(t, ev, idx)
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ev, ok := ev.(*types.DuplicateVoteEvidence)
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require.True(t, ok)
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assert.Equal(t, pubkey.Address(), ev.VoteA.ValidatorAddress)
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assert.Equal(t, prevoteHeight, ev.Height())
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}
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}
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// 4 validators. 1 is byzantine. The other three are partitioned into A (1 val) and B (2 vals).
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// byzantine validator sends conflicting proposals into A and B,
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// and prevotes/precommits on both of them.
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// B sees a commit, A doesn't.
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// Heal partition and ensure A sees the commit
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func TestByzantineConflictingProposalsWithPartition(t *testing.T) {
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// TODO: https://github.com/tendermint/tendermint/issues/6092
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t.SkipNow()
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// n := 4
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// logger := consensusLogger().With("test", "byzantine")
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// app := newCounter
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// states, cleanup := randConsensusState(n, "consensus_byzantine_test", newMockTickerFunc(false), app)
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// t.Cleanup(cleanup)
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// // give the byzantine validator a normal ticker
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// ticker := NewTimeoutTicker()
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// ticker.SetLogger(states[0].logger)
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// states[0].SetTimeoutTicker(ticker)
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// p2pLogger := logger.With("module", "p2p")
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// blocksSubs := make([]types.Subscription, n)
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// reactors := make([]p2p.Reactor, n)
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// for i := 0; i < n; i++ {
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// // enable txs so we can create different proposals
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// assertMempool(states[i].txNotifier).EnableTxsAvailable()
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// eventBus := states[i].eventBus
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// eventBus.SetLogger(logger.With("module", "events", "validator", i))
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// var err error
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// blocksSubs[i], err = eventBus.Subscribe(ctx, testSubscriber, types.EventQueryNewBlock)
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// require.NoError(t, err)
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// conR := NewReactor(states[i], true) // so we don't start the consensus states
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// conR.SetLogger(logger.With("validator", i))
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// conR.SetEventBus(eventBus)
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// var conRI p2p.Reactor = conR
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// // make first val byzantine
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// if i == 0 {
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// conRI = NewByzantineReactor(conR)
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// }
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// reactors[i] = conRI
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// err = states[i].blockExec.Store().Save(states[i].state) // for save height 1's validators info
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// require.NoError(t, err)
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// }
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// switches := p2p.MakeConnectedSwitches(config.P2P, N, func(i int, sw *p2p.Switch) *p2p.Switch {
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// sw.SetLogger(p2pLogger.With("validator", i))
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// sw.AddReactor("CONSENSUS", reactors[i])
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// return sw
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// }, func(sws []*p2p.Switch, i, j int) {
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// // the network starts partitioned with globally active adversary
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// if i != 0 {
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// return
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// }
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// p2p.Connect2Switches(sws, i, j)
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// })
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// // make first val byzantine
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// // NOTE: Now, test validators are MockPV, which by default doesn't
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// // do any safety checks.
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// states[0].privValidator.(types.MockPV).DisableChecks()
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// states[0].decideProposal = func(j int32) func(int64, int32) {
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// return func(height int64, round int32) {
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// byzantineDecideProposalFunc(t, height, round, states[j], switches[j])
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// }
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// }(int32(0))
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// // We are setting the prevote function to do nothing because the prevoting
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// // and precommitting are done alongside the proposal.
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// states[0].doPrevote = func(height int64, round int32) {}
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// defer func() {
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// for _, sw := range switches {
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// err := sw.Stop()
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// require.NoError(t, err)
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// }
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// }()
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// // start the non-byz state machines.
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// // note these must be started before the byz
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// for i := 1; i < n; i++ {
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// cr := reactors[i].(*Reactor)
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// cr.SwitchToConsensus(cr.conS.GetState(), false)
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// }
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// // start the byzantine state machine
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// byzR := reactors[0].(*ByzantineReactor)
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// s := byzR.reactor.conS.GetState()
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// byzR.reactor.SwitchToConsensus(s, false)
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// // byz proposer sends one block to peers[0]
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// // and the other block to peers[1] and peers[2].
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// // note peers and switches order don't match.
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// peers := switches[0].Peers().List()
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// // partition A
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// ind0 := getSwitchIndex(switches, peers[0])
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// // partition B
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// ind1 := getSwitchIndex(switches, peers[1])
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// ind2 := getSwitchIndex(switches, peers[2])
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// p2p.Connect2Switches(switches, ind1, ind2)
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// // wait for someone in the big partition (B) to make a block
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// <-blocksSubs[ind2].Out()
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// t.Log("A block has been committed. Healing partition")
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// p2p.Connect2Switches(switches, ind0, ind1)
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// p2p.Connect2Switches(switches, ind0, ind2)
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// // wait till everyone makes the first new block
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// // (one of them already has)
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// wg := new(sync.WaitGroup)
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// for i := 1; i < N-1; i++ {
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// wg.Add(1)
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// go func(j int) {
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// <-blocksSubs[j].Out()
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// wg.Done()
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// }(i)
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// }
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// done := make(chan struct{})
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// go func() {
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// wg.Wait()
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// close(done)
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// }()
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// tick := time.NewTicker(time.Second * 10)
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// select {
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// case <-done:
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// case <-tick.C:
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// for i, reactor := range reactors {
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// t.Log(fmt.Sprintf("Consensus Reactor %v", i))
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// t.Log(fmt.Sprintf("%v", reactor))
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// }
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// t.Fatalf("Timed out waiting for all validators to commit first block")
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// }
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}
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// func byzantineDecideProposalFunc(t *testing.T, height int64, round int32, cs *State, sw *p2p.Switch) {
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// // byzantine user should create two proposals and try to split the vote.
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// // Avoid sending on internalMsgQueue and running consensus state.
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// // Create a new proposal block from state/txs from the mempool.
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// block1, blockParts1 := cs.createProposalBlock()
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// polRound, propBlockID := cs.ValidRound, types.BlockID{Hash: block1.Hash(), PartSetHeader: blockParts1.Header()}
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// proposal1 := types.NewProposal(height, round, polRound, propBlockID)
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// p1 := proposal1.ToProto()
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// if err := cs.privValidator.SignProposal(cs.state.ChainID, p1); err != nil {
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// t.Error(err)
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// }
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// proposal1.Signature = p1.Signature
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// // some new transactions come in (this ensures that the proposals are different)
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// deliverTxsRange(cs, 0, 1)
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// // Create a new proposal block from state/txs from the mempool.
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// block2, blockParts2 := cs.createProposalBlock()
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// polRound, propBlockID = cs.ValidRound, types.BlockID{Hash: block2.Hash(), PartSetHeader: blockParts2.Header()}
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// proposal2 := types.NewProposal(height, round, polRound, propBlockID)
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// p2 := proposal2.ToProto()
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// if err := cs.privValidator.SignProposal(cs.state.ChainID, p2); err != nil {
|
|
// t.Error(err)
|
|
// }
|
|
|
|
// proposal2.Signature = p2.Signature
|
|
|
|
// block1Hash := block1.Hash()
|
|
// block2Hash := block2.Hash()
|
|
|
|
// // broadcast conflicting proposals/block parts to peers
|
|
// peers := sw.Peers().List()
|
|
// t.Logf("Byzantine: broadcasting conflicting proposals to %d peers", len(peers))
|
|
// for i, peer := range peers {
|
|
// if i < len(peers)/2 {
|
|
// go sendProposalAndParts(height, round, cs, peer, proposal1, block1Hash, blockParts1)
|
|
// } else {
|
|
// go sendProposalAndParts(height, round, cs, peer, proposal2, block2Hash, blockParts2)
|
|
// }
|
|
// }
|
|
// }
|
|
|
|
// func sendProposalAndParts(
|
|
// height int64,
|
|
// round int32,
|
|
// cs *State,
|
|
// peer p2p.Peer,
|
|
// proposal *types.Proposal,
|
|
// blockHash []byte,
|
|
// parts *types.PartSet,
|
|
// ) {
|
|
// // proposal
|
|
// msg := &ProposalMessage{Proposal: proposal}
|
|
// peer.Send(DataChannel, MustEncode(msg))
|
|
|
|
// // parts
|
|
// for i := 0; i < int(parts.Total()); i++ {
|
|
// part := parts.GetPart(i)
|
|
// msg := &BlockPartMessage{
|
|
// Height: height, // This tells peer that this part applies to us.
|
|
// Round: round, // This tells peer that this part applies to us.
|
|
// Part: part,
|
|
// }
|
|
// peer.Send(DataChannel, MustEncode(msg))
|
|
// }
|
|
|
|
// // votes
|
|
// cs.mtx.Lock()
|
|
// prevote, _ := cs.signVote(tmproto.PrevoteType, blockHash, parts.Header())
|
|
// precommit, _ := cs.signVote(tmproto.PrecommitType, blockHash, parts.Header())
|
|
// cs.mtx.Unlock()
|
|
|
|
// peer.Send(VoteChannel, MustEncode(&VoteMessage{prevote}))
|
|
// peer.Send(VoteChannel, MustEncode(&VoteMessage{precommit}))
|
|
// }
|
|
|
|
// type ByzantineReactor struct {
|
|
// service.Service
|
|
// reactor *Reactor
|
|
// }
|
|
|
|
// func NewByzantineReactor(conR *Reactor) *ByzantineReactor {
|
|
// return &ByzantineReactor{
|
|
// Service: conR,
|
|
// reactor: conR,
|
|
// }
|
|
// }
|
|
|
|
// func (br *ByzantineReactor) SetSwitch(s *p2p.Switch) { br.reactor.SetSwitch(s) }
|
|
// func (br *ByzantineReactor) GetChannels() []*p2p.ChannelDescriptor { return br.reactor.GetChannels() }
|
|
|
|
// func (br *ByzantineReactor) AddPeer(peer p2p.Peer) {
|
|
// if !br.reactor.IsRunning() {
|
|
// return
|
|
// }
|
|
|
|
// // Create peerState for peer
|
|
// peerState := NewPeerState(peer).SetLogger(br.reactor.logger)
|
|
// peer.Set(types.PeerStateKey, peerState)
|
|
|
|
// // Send our state to peer.
|
|
// // If we're syncing, broadcast a RoundStepMessage later upon SwitchToConsensus().
|
|
// if !br.reactor.waitSync {
|
|
// br.reactor.sendNewRoundStepMessage(peer)
|
|
// }
|
|
// }
|
|
|
|
// func (br *ByzantineReactor) RemovePeer(peer p2p.Peer, reason interface{}) {
|
|
// br.reactor.RemovePeer(peer, reason)
|
|
// }
|
|
|
|
// func (br *ByzantineReactor) Receive(chID byte, peer p2p.Peer, msgBytes []byte) {
|
|
// br.reactor.Receive(chID, peer, msgBytes)
|
|
// }
|
|
|
|
// func (br *ByzantineReactor) InitPeer(peer p2p.Peer) p2p.Peer { return peer }
|