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tendermint/consensus/reactor_test.go

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package consensus
import (
"fmt"
"net"
"sync"
"testing"
"time"
"github.com/tendermint/tendermint/config/tendermint_test"
"github.com/tendermint/ed25519"
. "github.com/tendermint/go-common"
cfg "github.com/tendermint/go-config"
"github.com/tendermint/go-crypto"
dbm "github.com/tendermint/go-db"
"github.com/tendermint/go-events"
"github.com/tendermint/go-p2p"
bc "github.com/tendermint/tendermint/blockchain"
"github.com/tendermint/tendermint/types"
)
func init() {
config = tendermint_test.ResetConfig("consensus_reactor_test")
}
func resetConfigTimeouts() {
config.Set("log_level", "notice")
config.Set("timeout_propose", 2000)
// config.Set("timeout_propose_delta", 500)
// config.Set("timeout_prevote", 1000)
// config.Set("timeout_prevote_delta", 500)
// config.Set("timeout_precommit", 1000)
// config.Set("timeout_precommit_delta", 500)
// config.Set("timeout_commit", 1000)
}
func TestReactor(t *testing.T) {
resetConfigTimeouts()
N := 4
css := randConsensusNet(N)
reactors := make([]*ConsensusReactor, N)
eventChans := make([]chan interface{}, N)
for i := 0; i < N; i++ {
blockStoreDB := dbm.NewDB(Fmt("blockstore%d", i), config.GetString("db_backend"), config.GetString("db_dir"))
blockStore := bc.NewBlockStore(blockStoreDB)
reactors[i] = NewConsensusReactor(css[i], blockStore, false)
reactors[i].SetPrivValidator(css[i].privValidator)
eventSwitch := events.NewEventSwitch()
_, err := eventSwitch.Start()
if err != nil {
t.Fatalf("Failed to start switch: %v", err)
}
reactors[i].SetEventSwitch(eventSwitch)
eventChans[i] = subscribeToEvent(eventSwitch, "tester", types.EventStringNewBlock(), 1)
}
p2p.MakeConnectedSwitches(N, func(i int, s *p2p.Switch) *p2p.Switch {
s.AddReactor("CONSENSUS", reactors[i])
return s
}, net.Pipe)
// wait till everyone makes the first new block
wg := new(sync.WaitGroup)
wg.Add(N)
for i := 0; i < N; i++ {
go func(j int) {
<-eventChans[j]
wg.Done()
}(i)
}
done := make(chan struct{})
go func() {
wg.Wait()
close(done)
}()
tick := time.NewTicker(time.Second * 3)
select {
case <-done:
case <-tick.C:
t.Fatalf("Timed out waiting for all validators to commit first block")
}
}
func TestByzantine(t *testing.T) {
resetConfigTimeouts()
N := 4
css := randConsensusNet(N)
switches := make([]*p2p.Switch, N)
for i := 0; i < N; i++ {
switches[i] = p2p.NewSwitch(cfg.NewMapConfig(nil))
}
reactors := make([]*ConsensusReactor, N)
eventChans := make([]chan interface{}, N)
for i := 0; i < N; i++ {
blockStoreDB := dbm.NewDB(Fmt("blockstore%d", i), config.GetString("db_backend"), config.GetString("db_dir"))
blockStore := bc.NewBlockStore(blockStoreDB)
if i == 0 {
// make byzantine
css[i].decideProposal = func(j int) func(int, int) {
return func(height, round int) {
fmt.Println("hmph", j)
byzantineDecideProposalFunc(height, round, css[j], switches[j])
}
}(i)
css[i].doPrevote = func(height, round int) {}
css[i].setProposal = func(j int) func(proposal *types.Proposal) error {
return func(proposal *types.Proposal) error {
return byzantineSetProposal(proposal, css[j], switches[j])
}
}(i)
}
reactors[i] = NewConsensusReactor(css[i], blockStore, false)
reactors[i].SetPrivValidator(css[i].privValidator)
eventSwitch := events.NewEventSwitch()
_, err := eventSwitch.Start()
if err != nil {
t.Fatalf("Failed to start switch: %v", err)
}
reactors[i].SetEventSwitch(eventSwitch)
eventChans[i] = subscribeToEvent(eventSwitch, "tester", types.EventStringNewBlock(), 1)
}
p2p.MakeConnectedSwitches(N, func(i int, s *p2p.Switch) *p2p.Switch {
s.AddReactor("CONSENSUS", reactors[i])
return s
}, net.Pipe)
// wait till everyone makes the first new block
wg := new(sync.WaitGroup)
wg.Add(N)
for i := 0; i < N; i++ {
go func(j int) {
<-eventChans[j]
wg.Done()
}(i)
}
done := make(chan struct{})
go func() {
wg.Wait()
close(done)
}()
tick := time.NewTicker(time.Second * 3)
select {
case <-done:
case <-tick.C:
t.Fatalf("Timed out waiting for all validators to commit first block")
}
}
//-------------------------------
// byzantine consensus functions
func byzantineDecideProposalFunc(height, round int, cs *ConsensusState, sw *p2p.Switch) {
// byzantine user should create two proposals and try to split the vote.
// Avoid sending on internalMsgQueue and running consensus state.
// Create a new proposal block from state/txs from the mempool.
block1, blockParts1 := cs.createProposalBlock()
polRound, polBlockID := cs.Votes.POLInfo()
proposal1 := types.NewProposal(height, round, blockParts1.Header(), polRound, polBlockID)
cs.privValidator.SignProposal(cs.state.ChainID, proposal1) // byzantine doesnt err
// Create a new proposal block from state/txs from the mempool.
block2, blockParts2 := cs.createProposalBlock()
polRound, polBlockID = cs.Votes.POLInfo()
proposal2 := types.NewProposal(height, round, blockParts2.Header(), polRound, polBlockID)
cs.privValidator.SignProposal(cs.state.ChainID, proposal2) // byzantine doesnt err
log.Notice("Byzantine: broadcasting conflicting proposals")
// broadcast conflicting proposals/block parts to peers
peers := sw.Peers().List()
for i, peer := range peers {
if i < len(peers)/2 {
go sendProposalAndParts(height, round, cs, peer, proposal1, block1, blockParts1)
} else {
go sendProposalAndParts(height, round, cs, peer, proposal2, block2, blockParts2)
}
}
}
func sendProposalAndParts(height, round int, cs *ConsensusState, peer *p2p.Peer, proposal *types.Proposal, block *types.Block, parts *types.PartSet) {
// proposal
msg := &ProposalMessage{Proposal: proposal}
peer.Send(DataChannel, struct{ ConsensusMessage }{msg})
// parts
for i := 0; i < 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, struct{ ConsensusMessage }{msg})
}
// votes
prevote, _ := cs.signVote(types.VoteTypePrevote, block.Hash(), parts.Header())
peer.Send(VoteChannel, struct{ ConsensusMessage }{&VoteMessage{prevote}})
precommit, _ := cs.signVote(types.VoteTypePrecommit, block.Hash(), parts.Header())
peer.Send(VoteChannel, struct{ ConsensusMessage }{&VoteMessage{precommit}})
}
func byzantineSetProposal(proposal *types.Proposal, cs *ConsensusState, sw *p2p.Switch) error {
peers := sw.Peers().List()
for _, peer := range peers {
// votes
var blockHash []byte // XXX proposal.BlockHash
blockHash = []byte{0, 1, 0, 2, 0, 3}
prevote, _ := cs.signVote(types.VoteTypePrevote, blockHash, proposal.BlockPartsHeader)
peer.Send(VoteChannel, struct{ ConsensusMessage }{&VoteMessage{prevote}})
precommit, _ := cs.signVote(types.VoteTypePrecommit, blockHash, proposal.BlockPartsHeader)
peer.Send(VoteChannel, struct{ ConsensusMessage }{&VoteMessage{precommit}})
}
return nil
}
//----------------------------------------
// byzantine privValidator
type ByzantinePrivValidator struct {
Address []byte `json:"address"`
PubKey crypto.PubKey `json:"pub_key"`
// PrivKey should be empty if a Signer other than the default is being used.
PrivKey crypto.PrivKey `json:"priv_key"`
types.Signer `json:"-"`
mtx sync.Mutex
}
func (privVal *ByzantinePrivValidator) SetSigner(s types.Signer) {
privVal.Signer = s
}
// Generates a new validator with private key.
func GenPrivValidator() *ByzantinePrivValidator {
privKeyBytes := new([64]byte)
copy(privKeyBytes[:32], crypto.CRandBytes(32))
pubKeyBytes := ed25519.MakePublicKey(privKeyBytes)
pubKey := crypto.PubKeyEd25519(*pubKeyBytes)
privKey := crypto.PrivKeyEd25519(*privKeyBytes)
return &ByzantinePrivValidator{
Address: pubKey.Address(),
PubKey: pubKey,
PrivKey: privKey,
Signer: types.NewDefaultSigner(privKey),
}
}
func (privVal *ByzantinePrivValidator) GetAddress() []byte {
return privVal.Address
}
func (privVal *ByzantinePrivValidator) SignVote(chainID string, vote *types.Vote) error {
privVal.mtx.Lock()
defer privVal.mtx.Unlock()
// Sign
vote.Signature = privVal.Sign(types.SignBytes(chainID, vote)).(crypto.SignatureEd25519)
return nil
}
func (privVal *ByzantinePrivValidator) SignProposal(chainID string, proposal *types.Proposal) error {
privVal.mtx.Lock()
defer privVal.mtx.Unlock()
// Sign
proposal.Signature = privVal.Sign(types.SignBytes(chainID, proposal)).(crypto.SignatureEd25519)
return nil
}
func (privVal *ByzantinePrivValidator) String() string {
return Fmt("PrivValidator{%X}", privVal.Address)
}