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// Copyright 2019 The dexon-consensus Authors
// This file is part of the dexon-consensus library.
//
// The dexon-consensus library is free software: you can redistribute it
// and/or modify it under the terms of the GNU Lesser General Public License as
// published by the Free Software Foundation, either version 3 of the License,
// or (at your option) any later version.
//
// The dexon-consensus library is distributed in the hope that it will be
// useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
// General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the dexon-consensus library. If not, see
// <http://www.gnu.org/licenses/>.
package utils
import (
"context"
"testing"
"time"
"github.com/stretchr/testify/suite"
"gitlab.com/byzantine-lab/tangerine-consensus/core/crypto"
"gitlab.com/byzantine-lab/tangerine-consensus/core/crypto/dkg"
"gitlab.com/byzantine-lab/tangerine-consensus/core/crypto/ecdsa"
"gitlab.com/byzantine-lab/tangerine-consensus/core/types"
typesDKG "gitlab.com/byzantine-lab/tangerine-consensus/core/types/dkg"
)
type UtilsTestSuite struct {
suite.Suite
}
func (s *UtilsTestSuite) TestVerifyDKGComplaint() {
signComplaint := func(prv crypto.PrivateKey, complaint *typesDKG.Complaint) {
var err error
complaint.Signature, err = prv.Sign(hashDKGComplaint(complaint))
s.Require().NoError(err)
}
prv1, err := ecdsa.NewPrivateKey()
s.Require().NoError(err)
nID1 := types.NewNodeID(prv1.PublicKey())
prv2, err := ecdsa.NewPrivateKey()
s.Require().NoError(err)
nID2 := types.NewNodeID(prv2.PublicKey())
prvShares, pubShares := dkg.NewPrivateKeyShares(3)
mpk := &typesDKG.MasterPublicKey{
ProposerID: nID1,
DKGID: typesDKG.NewID(nID1),
PublicKeyShares: *pubShares.Move(),
}
mpk.Signature, err = prv1.Sign(hashDKGMasterPublicKey(mpk))
s.Require().NoError(err)
// Valid NackComplaint.
complaint := &typesDKG.Complaint{
ProposerID: nID2,
}
signComplaint(prv2, complaint)
s.Require().True(complaint.IsNack())
ok, err := VerifyDKGComplaint(complaint, mpk)
s.Require().NoError(err)
s.True(ok)
// Correct privateShare.
prvShares.SetParticipants(dkg.IDs{typesDKG.NewID(nID1), typesDKG.NewID(nID2)})
share, exist := prvShares.Share(typesDKG.NewID(nID2))
s.Require().True(exist)
prvShare := &typesDKG.PrivateShare{
ProposerID: nID1,
ReceiverID: nID2,
PrivateShare: *share,
}
prvShare.Signature, err = prv1.Sign(hashDKGPrivateShare(prvShare))
s.Require().NoError(err)
complaint.PrivateShare = *prvShare
signComplaint(prv2, complaint)
ok, err = VerifyDKGComplaint(complaint, mpk)
s.Require().NoError(err)
s.False(ok)
// Incorrect privateShare.
share, exist = prvShares.Share(typesDKG.NewID(nID1))
s.Require().True(exist)
prvShare.PrivateShare = *share
prvShare.Signature, err = prv1.Sign(hashDKGPrivateShare(prvShare))
s.Require().NoError(err)
complaint.PrivateShare = *prvShare
signComplaint(prv2, complaint)
ok, err = VerifyDKGComplaint(complaint, mpk)
s.Require().NoError(err)
s.True(ok)
// MPK is incorrect.
mpk.Round++
ok, err = VerifyDKGComplaint(complaint, mpk)
s.Require().NoError(err)
s.False(ok)
// MPK's proposer not match with prvShares'.
mpk.Round--
mpk.ProposerID = nID2
mpk.Signature, err = prv1.Sign(hashDKGMasterPublicKey(mpk))
s.Require().NoError(err)
ok, err = VerifyDKGComplaint(complaint, mpk)
s.Require().NoError(err)
s.False(ok)
}
func (s *UtilsTestSuite) TestDummyReceiver() {
var (
msgCount = 1000
fakeMsgs = make([]int, 0, msgCount)
)
for i := 0; i < msgCount; i++ {
fakeMsgs = append(fakeMsgs, i)
}
launchDummySender := func(msgs []int, inputChan chan<- types.Msg) {
finished := make(chan struct{}, 1)
go func() {
defer func() {
finished <- struct{}{}
}()
for _, v := range msgs {
inputChan <- types.Msg{
Payload: v,
}
}
}()
select {
case <-finished:
case <-time.After(1 * time.Second):
s.Require().FailNow("unable to deliver all messages in time")
}
}
checkBuffer := func(sent []int, buff []types.Msg) {
s.Require().Len(buff, len(sent))
for i := range sent {
s.Require().Equal(sent[i], buff[i].Payload.(int))
}
}
// Basic scenario: a dummy receiver with caching enabled.
recv := make(chan types.Msg)
buff := []types.Msg{}
cancel, finished := LaunchDummyReceiver(
context.Background(), recv, func(msg types.Msg) {
buff = append(buff, msg)
})
launchDummySender(fakeMsgs, recv)
cancel()
select {
case <-finished:
case <-time.After(1 * time.Second):
s.Require().FailNow("should finished after cancel is called")
}
checkBuffer(fakeMsgs, buff)
// Dummy receiver can be shutdown along with parent context, and caching
// is not enabled.
ctx, cancel := context.WithCancel(context.Background())
_, finished = LaunchDummyReceiver(ctx, recv, nil)
launchDummySender(fakeMsgs, recv)
cancel()
select {
case <-finished:
case <-time.After(1 * time.Second):
s.Require().FailNow("should finished after cancel is called")
}
}
func TestUtils(t *testing.T) {
suite.Run(t, new(UtilsTestSuite))
}
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