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package evidence_test
import (
"encoding/hex"
"math/rand"
"sync"
"testing"
"time"
"github.com/fortytw2/leaktest"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/mock"
"github.com/stretchr/testify/require"
dbm "github.com/tendermint/tm-db"
"github.com/tendermint/tendermint/crypto"
"github.com/tendermint/tendermint/crypto/tmhash"
"github.com/tendermint/tendermint/internal/evidence"
"github.com/tendermint/tendermint/internal/evidence/mocks"
"github.com/tendermint/tendermint/internal/p2p"
"github.com/tendermint/tendermint/internal/p2p/p2ptest"
"github.com/tendermint/tendermint/libs/log"
tmproto "github.com/tendermint/tendermint/proto/tendermint/types"
sm "github.com/tendermint/tendermint/state"
"github.com/tendermint/tendermint/types"
)
var (
numEvidence = 10
rng = rand.New(rand.NewSource(time.Now().UnixNano()))
)
type reactorTestSuite struct {
network *p2ptest.Network
logger log.Logger
reactors map[types.NodeID]*evidence.Reactor
pools map[types.NodeID]*evidence.Pool
evidenceChannels map[types.NodeID]*p2p.Channel
peerUpdates map[types.NodeID]*p2p.PeerUpdates
peerChans map[types.NodeID]chan p2p.PeerUpdate
nodes []*p2ptest.Node
numStateStores int
}
func setup(t *testing.T, stateStores []sm.Store, chBuf uint) *reactorTestSuite {
t.Helper()
pID := make([]byte, 16)
_, err := rng.Read(pID)
require.NoError(t, err)
numStateStores := len(stateStores)
rts := &reactorTestSuite{
numStateStores: numStateStores,
logger: log.TestingLogger().With("testCase", t.Name()),
network: p2ptest.MakeNetwork(t, p2ptest.NetworkOptions{NumNodes: numStateStores}),
reactors: make(map[types.NodeID]*evidence.Reactor, numStateStores),
pools: make(map[types.NodeID]*evidence.Pool, numStateStores),
peerUpdates: make(map[types.NodeID]*p2p.PeerUpdates, numStateStores),
peerChans: make(map[types.NodeID]chan p2p.PeerUpdate, numStateStores),
}
chDesc := p2p.ChannelDescriptor{ID: byte(evidence.EvidenceChannel)}
rts.evidenceChannels = rts.network.MakeChannelsNoCleanup(t,
chDesc,
new(tmproto.EvidenceList),
int(chBuf))
require.Len(t, rts.network.RandomNode().PeerManager.Peers(), 0)
idx := 0
evidenceTime := time.Date(2019, 1, 1, 0, 0, 0, 0, time.UTC)
for nodeID := range rts.network.Nodes {
logger := rts.logger.With("validator", idx)
evidenceDB := dbm.NewMemDB()
blockStore := &mocks.BlockStore{}
state, _ := stateStores[idx].Load()
blockStore.On("LoadBlockMeta", mock.AnythingOfType("int64")).Return(func(h int64) *types.BlockMeta {
if h <= state.LastBlockHeight {
return &types.BlockMeta{Header: types.Header{Time: evidenceTime}}
}
return nil
})
rts.pools[nodeID], err = evidence.NewPool(logger, evidenceDB, stateStores[idx], blockStore)
require.NoError(t, err)
rts.peerChans[nodeID] = make(chan p2p.PeerUpdate)
rts.peerUpdates[nodeID] = p2p.NewPeerUpdates(rts.peerChans[nodeID], 1)
rts.network.Nodes[nodeID].PeerManager.Register(rts.peerUpdates[nodeID])
rts.nodes = append(rts.nodes, rts.network.Nodes[nodeID])
rts.reactors[nodeID] = evidence.NewReactor(logger,
rts.evidenceChannels[nodeID],
rts.peerUpdates[nodeID],
rts.pools[nodeID])
require.NoError(t, rts.reactors[nodeID].Start())
require.True(t, rts.reactors[nodeID].IsRunning())
idx++
}
t.Cleanup(func() {
for _, r := range rts.reactors {
if r.IsRunning() {
require.NoError(t, r.Stop())
require.False(t, r.IsRunning())
}
}
leaktest.Check(t)
})
return rts
}
func (rts *reactorTestSuite) start(t *testing.T) {
rts.network.Start(t)
require.Len(t,
rts.network.RandomNode().PeerManager.Peers(),
rts.numStateStores-1,
"network does not have expected number of nodes")
}
func (rts *reactorTestSuite) waitForEvidence(t *testing.T, evList types.EvidenceList, ids ...types.NodeID) {
t.Helper()
fn := func(pool *evidence.Pool) {
var (
localEvList []types.Evidence
size int64
loops int
)
// wait till we have at least the amount of evidence
// that we expect. if there's more local evidence then
// it doesn't make sense to wait longer and a
// different assertion should catch the resulting error
for len(localEvList) < len(evList) {
// each evidence should not be more than 500 bytes
localEvList, size = pool.PendingEvidence(int64(len(evList) * 500))
if loops == 100 {
t.Log("current wait status:", "|",
"local", len(localEvList), "|",
"waitlist", len(evList), "|",
"size", size)
}
loops++
}
// put the reaped evidence in a map so we can quickly check we got everything
evMap := make(map[string]types.Evidence)
for _, e := range localEvList {
evMap[string(e.Hash())] = e
}
for i, expectedEv := range evList {
gotEv := evMap[string(expectedEv.Hash())]
require.Equalf(
t,
expectedEv,
gotEv,
"evidence for pool %d in pool does not match; got: %v, expected: %v", i, gotEv, expectedEv,
)
}
}
if len(ids) == 1 {
// special case waiting once, just to avoid the extra
// goroutine, in the case that this hits a timeout,
// the stack will be clearer.
fn(rts.pools[ids[0]])
return
}
wg := sync.WaitGroup{}
for id := range rts.pools {
if len(ids) > 0 && !p2ptest.NodeInSlice(id, ids) {
// if an ID list is specified, then we only
// want to wait for those pools that are
// specified in the list, otherwise, wait for
// all pools.
continue
}
wg.Add(1)
go func(id types.NodeID) { defer wg.Done(); fn(rts.pools[id]) }(id)
}
wg.Wait()
}
func (rts *reactorTestSuite) assertEvidenceChannelsEmpty(t *testing.T) {
t.Helper()
for id, r := range rts.reactors {
require.NoError(t, r.Stop(), "stopping reactor #%s", id)
r.Wait()
require.False(t, r.IsRunning(), "reactor #%d did not stop", id)
}
for id, ech := range rts.evidenceChannels {
require.Empty(t, ech.Out, "checking channel #%q", id)
}
}
func createEvidenceList(
t *testing.T,
pool *evidence.Pool,
val types.PrivValidator,
numEvidence int,
) types.EvidenceList {
t.Helper()
evList := make([]types.Evidence, numEvidence)
for i := 0; i < numEvidence; i++ {
ev := types.NewMockDuplicateVoteEvidenceWithValidator(
int64(i+1),
time.Date(2019, 1, 1, 0, 0, 0, 0, time.UTC),
val,
evidenceChainID,
)
require.NoError(t, pool.AddEvidence(ev),
"adding evidence it#%d of %d to pool with height %d",
i, numEvidence, pool.State().LastBlockHeight)
evList[i] = ev
}
return evList
}
func TestReactorMultiDisconnect(t *testing.T) {
val := types.NewMockPV()
height := int64(numEvidence) + 10
stateDB1 := initializeValidatorState(t, val, height)
stateDB2 := initializeValidatorState(t, val, height)
rts := setup(t, []sm.Store{stateDB1, stateDB2}, 20)
primary := rts.nodes[0]
secondary := rts.nodes[1]
_ = createEvidenceList(t, rts.pools[primary.NodeID], val, numEvidence)
require.Equal(t, primary.PeerManager.Status(secondary.NodeID), p2p.PeerStatusDown)
rts.start(t)
require.Equal(t, primary.PeerManager.Status(secondary.NodeID), p2p.PeerStatusUp)
// Ensure "disconnecting" the secondary peer from the primary more than once
// is handled gracefully.
primary.PeerManager.Disconnected(secondary.NodeID)
require.Equal(t, primary.PeerManager.Status(secondary.NodeID), p2p.PeerStatusDown)
_, err := primary.PeerManager.TryEvictNext()
require.NoError(t, err)
primary.PeerManager.Disconnected(secondary.NodeID)
require.Equal(t, primary.PeerManager.Status(secondary.NodeID), p2p.PeerStatusDown)
require.Equal(t, secondary.PeerManager.Status(primary.NodeID), p2p.PeerStatusUp)
}
// TestReactorBroadcastEvidence creates an environment of multiple peers that
// are all at the same height. One peer, designated as a primary, gossips all
// evidence to the remaining peers.
func TestReactorBroadcastEvidence(t *testing.T) {
numPeers := 7
// create a stateDB for all test suites (nodes)
stateDBs := make([]sm.Store, numPeers)
val := types.NewMockPV()
// We need all validators saved for heights at least as high as we have
// evidence for.
height := int64(numEvidence) + 10
for i := 0; i < numPeers; i++ {
stateDBs[i] = initializeValidatorState(t, val, height)
}
rts := setup(t, stateDBs, 0)
rts.start(t)
// Create a series of fixtures where each suite contains a reactor and
// evidence pool. In addition, we mark a primary suite and the rest are
// secondaries where each secondary is added as a peer via a PeerUpdate to the
// primary. As a result, the primary will gossip all evidence to each secondary.
primary := rts.network.RandomNode()
secondaries := make([]*p2ptest.Node, 0, len(rts.network.NodeIDs())-1)
secondaryIDs := make([]types.NodeID, 0, cap(secondaries))
for id := range rts.network.Nodes {
if id == primary.NodeID {
continue
}
secondaries = append(secondaries, rts.network.Nodes[id])
secondaryIDs = append(secondaryIDs, id)
}
evList := createEvidenceList(t, rts.pools[primary.NodeID], val, numEvidence)
// Add each secondary suite (node) as a peer to the primary suite (node). This
// will cause the primary to gossip all evidence to the secondaries.
for _, suite := range secondaries {
rts.peerChans[primary.NodeID] <- p2p.PeerUpdate{
Status: p2p.PeerStatusUp,
NodeID: suite.NodeID,
}
}
// Wait till all secondary suites (reactor) received all evidence from the
// primary suite (node).
rts.waitForEvidence(t, evList, secondaryIDs...)
for _, pool := range rts.pools {
require.Equal(t, numEvidence, int(pool.Size()))
}
rts.assertEvidenceChannelsEmpty(t)
}
// TestReactorSelectiveBroadcast tests a context where we have two reactors
// connected to one another but are at different heights. Reactor 1 which is
// ahead receives a list of evidence.
func TestReactorBroadcastEvidence_Lagging(t *testing.T) {
val := types.NewMockPV()
height1 := int64(numEvidence) + 10
height2 := int64(numEvidence) / 2
// stateDB1 is ahead of stateDB2, where stateDB1 has all heights (1-20) and
// stateDB2 only has heights 1-5.
stateDB1 := initializeValidatorState(t, val, height1)
stateDB2 := initializeValidatorState(t, val, height2)
rts := setup(t, []sm.Store{stateDB1, stateDB2}, 100)
rts.start(t)
primary := rts.nodes[0]
secondary := rts.nodes[1]
// Send a list of valid evidence to the first reactor's, the one that is ahead,
// evidence pool.
evList := createEvidenceList(t, rts.pools[primary.NodeID], val, numEvidence)
// Add each secondary suite (node) as a peer to the primary suite (node). This
// will cause the primary to gossip all evidence to the secondaries.
rts.peerChans[primary.NodeID] <- p2p.PeerUpdate{
Status: p2p.PeerStatusUp,
NodeID: secondary.NodeID,
}
// only ones less than the peers height should make it through
rts.waitForEvidence(t, evList[:height2], secondary.NodeID)
require.Equal(t, numEvidence, int(rts.pools[primary.NodeID].Size()))
require.Equal(t, int(height2), int(rts.pools[secondary.NodeID].Size()))
rts.assertEvidenceChannelsEmpty(t)
}
func TestReactorBroadcastEvidence_Pending(t *testing.T) {
val := types.NewMockPV()
height := int64(10)
stateDB1 := initializeValidatorState(t, val, height)
stateDB2 := initializeValidatorState(t, val, height)
rts := setup(t, []sm.Store{stateDB1, stateDB2}, 100)
primary := rts.nodes[0]
secondary := rts.nodes[1]
evList := createEvidenceList(t, rts.pools[primary.NodeID], val, numEvidence)
// Manually add half the evidence to the secondary which will mark them as
// pending.
for i := 0; i < numEvidence/2; i++ {
require.NoError(t, rts.pools[secondary.NodeID].AddEvidence(evList[i]))
}
// the secondary should have half the evidence as pending
require.Equal(t, numEvidence/2, int(rts.pools[secondary.NodeID].Size()))
rts.start(t)
// The secondary reactor should have received all the evidence ignoring the
// already pending evidence.
rts.waitForEvidence(t, evList, secondary.NodeID)
// check to make sure that all of the evidence has
// propogated
require.Len(t, rts.pools, 2)
assert.EqualValues(t, numEvidence, rts.pools[primary.NodeID].Size(),
"primary node should have all the evidence")
if assert.EqualValues(t, numEvidence, rts.pools[secondary.NodeID].Size(),
"secondary nodes should have caught up") {
rts.assertEvidenceChannelsEmpty(t)
}
}
func TestReactorBroadcastEvidence_Committed(t *testing.T) {
val := types.NewMockPV()
height := int64(10)
stateDB1 := initializeValidatorState(t, val, height)
stateDB2 := initializeValidatorState(t, val, height)
rts := setup(t, []sm.Store{stateDB1, stateDB2}, 0)
primary := rts.nodes[0]
secondary := rts.nodes[1]
// add all evidence to the primary reactor
evList := createEvidenceList(t, rts.pools[primary.NodeID], val, numEvidence)
// Manually add half the evidence to the secondary which will mark them as
// pending.
for i := 0; i < numEvidence/2; i++ {
require.NoError(t, rts.pools[secondary.NodeID].AddEvidence(evList[i]))
}
// the secondary should have half the evidence as pending
require.Equal(t, numEvidence/2, int(rts.pools[secondary.NodeID].Size()))
state, err := stateDB2.Load()
require.NoError(t, err)
// update the secondary's pool such that all pending evidence is committed
state.LastBlockHeight++
rts.pools[secondary.NodeID].Update(state, evList[:numEvidence/2])
// the secondary should have half the evidence as committed
require.Equal(t, 0, int(rts.pools[secondary.NodeID].Size()))
// start the network and ensure it's configured
rts.start(t)
// without the following sleep the test consistently fails;
// likely because the sleep forces a context switch that lets
// the router process other operations.
time.Sleep(2 * time.Millisecond)
// The secondary reactor should have received all the evidence ignoring the
// already committed evidence.
rts.waitForEvidence(t, evList[numEvidence/2:], secondary.NodeID)
require.Len(t, rts.pools, 2)
assert.EqualValues(t, numEvidence, rts.pools[primary.NodeID].Size(),
"primary node should have all the evidence")
if assert.EqualValues(t, numEvidence/2, rts.pools[secondary.NodeID].Size(),
"secondary nodes should have caught up") {
rts.assertEvidenceChannelsEmpty(t)
}
}
func TestReactorBroadcastEvidence_FullyConnected(t *testing.T) {
numPeers := 7
// create a stateDB for all test suites (nodes)
stateDBs := make([]sm.Store, numPeers)
val := types.NewMockPV()
// We need all validators saved for heights at least as high as we have
// evidence for.
height := int64(numEvidence) + 10
for i := 0; i < numPeers; i++ {
stateDBs[i] = initializeValidatorState(t, val, height)
}
rts := setup(t, stateDBs, 0)
rts.start(t)
evList := createEvidenceList(t, rts.pools[rts.network.RandomNode().NodeID], val, numEvidence)
// every suite (reactor) connects to every other suite (reactor)
for outerID, outerChan := range rts.peerChans {
for innerID := range rts.peerChans {
if outerID != innerID {
outerChan <- p2p.PeerUpdate{
Status: p2p.PeerStatusUp,
NodeID: innerID,
}
}
}
}
// wait till all suites (reactors) received all evidence from other suites (reactors)
rts.waitForEvidence(t, evList)
for _, pool := range rts.pools {
require.Equal(t, numEvidence, int(pool.Size()))
// commit state so we do not continue to repeat gossiping the same evidence
state := pool.State()
state.LastBlockHeight++
pool.Update(state, evList)
}
}
// nolint:lll
func TestEvidenceListSerialization(t *testing.T) {
exampleVote := func(msgType byte) *types.Vote {
var stamp, err = time.Parse(types.TimeFormat, "2017-12-25T03:00:01.234Z")
require.NoError(t, err)
return &types.Vote{
Type: tmproto.SignedMsgType(msgType),
Height: 3,
Round: 2,
Timestamp: stamp,
BlockID: types.BlockID{
Hash: tmhash.Sum([]byte("blockID_hash")),
PartSetHeader: types.PartSetHeader{
Total: 1000000,
Hash: tmhash.Sum([]byte("blockID_part_set_header_hash")),
},
},
ValidatorAddress: crypto.AddressHash([]byte("validator_address")),
ValidatorIndex: 56789,
}
}
val := &types.Validator{
Address: crypto.AddressHash([]byte("validator_address")),
VotingPower: 10,
}
valSet := types.NewValidatorSet([]*types.Validator{val})
dupl := types.NewDuplicateVoteEvidence(
exampleVote(1),
exampleVote(2),
defaultEvidenceTime,
valSet,
)
testCases := map[string]struct {
evidenceList []types.Evidence
expBytes string
}{
"DuplicateVoteEvidence": {
[]types.Evidence{dupl},
"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",
},
}
for name, tc := range testCases {
tc := tc
t.Run(name, func(t *testing.T) {
protoEv := make([]tmproto.Evidence, len(tc.evidenceList))
for i := 0; i < len(tc.evidenceList); i++ {
ev, err := types.EvidenceToProto(tc.evidenceList[i])
require.NoError(t, err)
protoEv[i] = *ev
}
epl := tmproto.EvidenceList{
Evidence: protoEv,
}
bz, err := epl.Marshal()
require.NoError(t, err)
require.Equal(t, tc.expBytes, hex.EncodeToString(bz))
})
}
}