evidence: store tests and fixes

evidence/store.go

@@ -25,12 +25,12 @@ Impl:
 
 Schema for indexing evidence (note you need both height and hash to find a piece of evidence):
 
-"evidence-lookup"/<evidence-height>/<evidence-hash> -> evidenceInfo
+"evidence-lookup"/<evidence-height>/<evidence-hash> -> EvidenceInfo
-"evidence-outqueue"/<priority>/<evidence-height>/<evidence-hash> -> evidenceInfo
+"evidence-outqueue"/<priority>/<evidence-height>/<evidence-hash> -> EvidenceInfo
-"evidence-pending"/<evidence-height>/<evidence-hash> -> evidenceInfo
+"evidence-pending"/<evidence-height>/<evidence-hash> -> EvidenceInfo
 */
 
-type evidenceInfo struct {
+type EvidenceInfo struct {
 	Committed bool
 	Priority  int
 	Evidence  types.Evidence
@@ -46,16 +46,21 @@ func keyLookup(evidence types.Evidence) []byte {
 	return keyLookupFromHeightAndHash(evidence.Height(), evidence.Hash())
 }
 
+// big endian padded hex
+func be(h int) string {
+	return fmt.Sprintf("%0.16X", h)
+}
+
 func keyLookupFromHeightAndHash(height int, hash []byte) []byte {
-	return _key("%s/%d/%X", baseKeyLookup, height, hash)
+	return _key("%s/%s/%X", baseKeyLookup, be(height), hash)
 }
 
 func keyOutqueue(evidence types.Evidence, priority int) []byte {
-	return _key("%s/%d/%d/%X", baseKeyOutqueue, priority, evidence.Height(), evidence.Hash())
+	return _key("%s/%s/%s/%X", baseKeyOutqueue, be(priority), be(evidence.Height()), evidence.Hash())
 }
 
 func keyPending(evidence types.Evidence) []byte {
-	return _key("%s/%d/%X", baseKeyPending, evidence.Height(), evidence.Hash())
+	return _key("%s/%s/%X", baseKeyPending, be(evidence.Height()), evidence.Hash())
 }
 
 func _key(fmt_ string, o ...interface{}) []byte {
@@ -77,8 +82,13 @@ func NewEvidenceStore(db dbm.DB) *EvidenceStore {
 
 // PriorityEvidence returns the evidence from the outqueue, sorted by highest priority.
 func (store *EvidenceStore) PriorityEvidence() (evidence []types.Evidence) {
-	// TODO: revert order for highest first
+	// reverse the order so highest priority is first
-	return store.ListEvidence(baseKeyOutqueue)
+	l := store.ListEvidence(baseKeyOutqueue)
+	l2 := make([]types.Evidence, len(l))
+	for i, _ := range l {
+		l2[i] = l[len(l)-1-i]
+	}
+	return l2
 }
 
 // PendingEvidence returns all known uncommitted evidence.
@@ -93,7 +103,7 @@ func (store *EvidenceStore) ListEvidence(prefixKey string) (evidence []types.Evi
 	for iter.Next() {
 		val := iter.Value()
 
-		var ei evidenceInfo
+		var ei EvidenceInfo
 		wire.ReadBinaryBytes(val, &ei)
 		evidence = append(evidence, ei.Evidence)
 	}
@@ -101,26 +111,27 @@ func (store *EvidenceStore) ListEvidence(prefixKey string) (evidence []types.Evi
 }
 
 // GetEvidence fetches the evidence with the given height and hash.
-func (store *EvidenceStore) GetEvidence(height int, hash []byte) types.Evidence {
+func (store *EvidenceStore) GetEvidence(height int, hash []byte) *EvidenceInfo {
 	key := keyLookupFromHeightAndHash(height, hash)
 	val := store.db.Get(key)
+
 	if len(val) == 0 {
 		return nil
 	}
-	var ei evidenceInfo
+	ei := new(EvidenceInfo)
-	wire.ReadBinaryBytes(val, &ei)
+	wire.ReadBinaryBytes(val, ei)
-	return ei.Evidence
+	return ei
 }
 
 // AddNewEvidence adds the given evidence to the database.
 func (store *EvidenceStore) AddNewEvidence(evidence types.Evidence, priority int) (bool, error) {
 	// check if we already have seen it
-	ev := store.GetEvidence(evidence.Height(), evidence.Hash())
+	ei_ := store.GetEvidence(evidence.Height(), evidence.Hash())
-	if ev != nil {
+	if ei_ != nil && ei_.Evidence != nil {
 		return false, nil
 	}
 
-	ei := evidenceInfo{
+	ei := EvidenceInfo{
 		Committed: false,
 		Priority:  priority,
 		Evidence:  evidence,
@@ -152,8 +163,8 @@ func (store *EvidenceStore) MarkEvidenceAsCommitted(evidence types.Evidence) {
 	// if its committed, its been broadcast
 	store.MarkEvidenceAsBroadcasted(evidence)
 
-	key := keyPending(evidence)
+	pendingKey := keyPending(evidence)
-	store.db.Delete(key)
+	store.db.Delete(pendingKey)
 
 	ei := store.getEvidenceInfo(evidence)
 	ei.Committed = true
@@ -161,15 +172,16 @@ func (store *EvidenceStore) MarkEvidenceAsCommitted(evidence types.Evidence) {
 	// TODO: we should use the state db and db.Sync in state.Save instead.
 	// Else, if we call this before state.Save, we may never mark committed evidence as committed.
 	// Else, if we call this after state.Save, we may get stuck broadcasting evidence we never know we committed.
-	store.db.SetSync(key, wire.BinaryBytes(ei))
+	lookupKey := keyLookup(evidence)
+	store.db.SetSync(lookupKey, wire.BinaryBytes(ei))
 }
 
 //---------------------------------------------------
 // utils
 
-func (store *EvidenceStore) getEvidenceInfo(evidence types.Evidence) evidenceInfo {
+func (store *EvidenceStore) getEvidenceInfo(evidence types.Evidence) EvidenceInfo {
 	key := keyLookup(evidence)
-	var ei evidenceInfo
+	var ei EvidenceInfo
 	b := store.db.Get(key)
 	wire.ReadBinaryBytes(b, &ei)
 	return ei

evidence/store_test.go

@@ -0,0 +1,166 @@
+package evpool
+
+import (
+	"bytes"
+	"fmt"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	wire "github.com/tendermint/go-wire"
+	"github.com/tendermint/tendermint/types"
+	dbm "github.com/tendermint/tmlibs/db"
+)
+
+//-------------------------------------------
+
+func TestStoreAddDuplicate(t *testing.T) {
+	assert := assert.New(t)
+
+	db := dbm.NewMemDB()
+	store := NewEvidenceStore(db)
+
+	priority := 10
+	ev := newMockGoodEvidence(2, 1, []byte("val1"))
+
+	added, err := store.AddNewEvidence(ev, priority)
+	assert.Nil(err)
+	assert.True(added)
+
+	// cant add twice
+	added, err = store.AddNewEvidence(ev, priority)
+	assert.Nil(err)
+	assert.False(added)
+}
+
+func TestStoreMark(t *testing.T) {
+	assert := assert.New(t)
+
+	db := dbm.NewMemDB()
+	store := NewEvidenceStore(db)
+
+	// before we do anything, priority/pending are empty
+	priorityEv := store.PriorityEvidence()
+	pendingEv := store.PendingEvidence()
+	assert.Equal(0, len(priorityEv))
+	assert.Equal(0, len(pendingEv))
+
+	priority := 10
+	ev := newMockGoodEvidence(2, 1, []byte("val1"))
+
+	added, err := store.AddNewEvidence(ev, priority)
+	assert.Nil(err)
+	assert.True(added)
+
+	// get the evidence. verify. should be uncommitted
+	ei := store.GetEvidence(ev.Height(), ev.Hash())
+	assert.Equal(ev, ei.Evidence)
+	assert.Equal(priority, ei.Priority)
+	assert.False(ei.Committed)
+
+	// new evidence should be returns in priority/pending
+	priorityEv = store.PriorityEvidence()
+	pendingEv = store.PendingEvidence()
+	assert.Equal(1, len(priorityEv))
+	assert.Equal(1, len(pendingEv))
+
+	// priority is now empty
+	store.MarkEvidenceAsBroadcasted(ev)
+	priorityEv = store.PriorityEvidence()
+	pendingEv = store.PendingEvidence()
+	assert.Equal(0, len(priorityEv))
+	assert.Equal(1, len(pendingEv))
+
+	// priority and pending are now empty
+	store.MarkEvidenceAsCommitted(ev)
+	priorityEv = store.PriorityEvidence()
+	pendingEv = store.PendingEvidence()
+	assert.Equal(0, len(priorityEv))
+	assert.Equal(0, len(pendingEv))
+
+	// evidence should show committed
+	ei = store.GetEvidence(ev.Height(), ev.Hash())
+	assert.Equal(ev, ei.Evidence)
+	assert.Equal(priority, ei.Priority)
+	assert.True(ei.Committed)
+}
+
+func TestStorePriority(t *testing.T) {
+	assert := assert.New(t)
+
+	db := dbm.NewMemDB()
+	store := NewEvidenceStore(db)
+
+	// sorted by priority and then height
+	cases := []struct {
+		ev       MockGoodEvidence
+		priority int
+	}{
+		{newMockGoodEvidence(2, 1, []byte("val1")), 17},
+		{newMockGoodEvidence(5, 2, []byte("val2")), 15},
+		{newMockGoodEvidence(10, 2, []byte("val2")), 13},
+		{newMockGoodEvidence(100, 2, []byte("val2")), 11},
+		{newMockGoodEvidence(90, 2, []byte("val2")), 11},
+		{newMockGoodEvidence(80, 2, []byte("val2")), 11},
+	}
+
+	for _, c := range cases {
+		added, err := store.AddNewEvidence(c.ev, c.priority)
+		assert.True(added)
+		assert.Nil(err)
+	}
+
+	evList := store.PriorityEvidence()
+	for i, ev := range evList {
+		assert.Equal(ev, cases[i].ev)
+	}
+}
+
+//-------------------------------------------
+const (
+	evidenceTypeMock = byte(0x01)
+)
+
+var _ = wire.RegisterInterface(
+	struct{ types.Evidence }{},
+	wire.ConcreteType{MockGoodEvidence{}, evidenceTypeMock},
+)
+
+type MockGoodEvidence struct {
+	Height_  int
+	Address_ []byte
+	Index_   int
+}
+
+func newMockGoodEvidence(height, index int, address []byte) MockGoodEvidence {
+	return MockGoodEvidence{height, address, index}
+}
+
+func (e MockGoodEvidence) Height() int                 { return e.Height_ }
+func (e MockGoodEvidence) Address() []byte             { return e.Address_ }
+func (e MockGoodEvidence) Index() int                  { return e.Index_ }
+func (e MockGoodEvidence) Hash() []byte                { return []byte{byte(e.Index_)} }
+func (e MockGoodEvidence) Verify(chainID string) error { return nil }
+func (e MockGoodEvidence) Equal(ev types.Evidence) bool {
+	e2 := ev.(MockGoodEvidence)
+	return e.Height_ == e2.Height_ &&
+		bytes.Equal(e.Address_, e2.Address_) &&
+		e.Index_ == e2.Index_
+}
+func (e MockGoodEvidence) String() string {
+	return fmt.Sprintf("GoodEvidence: %d/%s/%d", e.Height_, e.Address_, e.Index_)
+}
+
+type MockBadEvidence struct {
+	MockGoodEvidence
+}
+
+func (e MockBadEvidence) Verify(chainID string) error { return fmt.Errorf("MockBadEvidence") }
+func (e MockBadEvidence) Equal(ev types.Evidence) bool {
+	e2 := ev.(MockBadEvidence)
+	return e.Height_ == e2.Height_ &&
+		bytes.Equal(e.Address_, e2.Address_) &&
+		e.Index_ == e2.Index_
+}
+func (e MockBadEvidence) String() string {
+	return fmt.Sprintf("BadEvidence: %d/%s/%d", e.Height_, e.Address_, e.Index_)
+}

types/evidence.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 
 	"github.com/tendermint/go-crypto"
+	wire "github.com/tendermint/go-wire"
 	"github.com/tendermint/tmlibs/merkle"
 )
 
@@ -78,6 +79,17 @@ func (evl EvidenceList) Has(evidence Evidence) bool {
 
 //-------------------------------------------
 
+const (
+	evidenceTypeDuplicateVote = byte(0x01)
+)
+
+var _ = wire.RegisterInterface(
+	struct{ Evidence }{},
+	wire.ConcreteType{&DuplicateVoteEvidence{}, evidenceTypeDuplicateVote},
+)
+
+//-------------------------------------------
+
 // DuplicateVoteEvidence contains evidence a validator signed two conflicting votes.
 type DuplicateVoteEvidence struct {
 	PubKey crypto.PubKey