// Create and initialize a state object. Set everything to default.
func CreateState(messageRouter common.MessageRouter) (s *State, err error) {
// check that we have a non-nil messageSender
if messageRouter == nil {
err = fmt.Errorf("Cannot initialize with a nil messageRouter")
return
}
// create a signature keypair for this state
pubKey, secKey, err := crypto.CreateKeyPair()
if err != nil {
return
}
// initialize State with default values and keypair
s = &State{
messageRouter: messageRouter,
self: &Participant{
index: 255,
address: messageRouter.Address(),
publicKey: pubKey,
},
secretKey: secKey,
currentStep: 1,
}
// register State and store our assigned ID
s.self.address.ID = messageRouter.RegisterHandler(s)
// a call to joinSia() may be placed here... behavior not fully defined
return
}
// Create and initialize a state object.
func CreateState(messageRouter common.MessageRouter) (s *State, err error) {
s = new(State)
// check that we have a non-nil messageSender
if messageRouter == nil {
err = fmt.Errorf("Cannot initialize with a nil messageRouter")
return
}
// create a signature keypair for this state
pubKey, secKey, err := crypto.CreateKeyPair()
if err != nil {
return
}
// calculate the value of an empty hash (default for storedEntropyStage2 on all hosts is a blank array)
emptyHash, err := crypto.CalculateTruncatedHash(s.storedEntropyStage2[:])
if err != nil {
return
}
// set state variables to their defaults
s.messageRouter = messageRouter
s.self = new(participant)
s.self.address = messageRouter.AddMessageHandler(s)
s.self.publicKey = pubKey
s.secretKey = secKey
for i := range s.previousEntropyStage1 {
s.previousEntropyStage1[i] = emptyHash
}
s.participantIndex = 255
s.currentStep = 1
s.wallets = make(map[string]uint64)
return
}
func TestParticipantEncoding(t *testing.T) {
// Try nil values
var p *Participant
_, err := p.GobEncode()
if err == nil {
t.Error("Encoded nil participant without error")
}
p = new(Participant)
_, err = p.GobEncode()
if err == nil {
t.Fatal("Should not be able to encode nil values")
}
// Make a bootstrap participant
pubKey, _, err := crypto.CreateKeyPair()
if err != nil {
t.Fatal(err)
}
p.publicKey = pubKey
p.address = bootstrapAddress
up := new(Participant)
ep, err := p.GobEncode()
if err != nil {
t.Fatal(err)
}
err = up.GobDecode(ep)
if err != nil {
t.Fatal(err)
}
if up.address != p.address {
t.Error("up.address != p.address")
}
compare := up.publicKey.Compare(p.publicKey)
if compare != true {
t.Error("up.PublicKey != p.PublicKey")
}
// try to decode into nil participant
up = nil
err = up.GobDecode(ep)
if err == nil {
t.Error("decoded into nil participant without error")
}
}
// Create and initialize a state object
func CreateState(messageSender common.MessageSender, participantIndex participantIndex) (s State, err error) {
// check that we have a non-nil messageSender
if messageSender == nil {
err = fmt.Errorf("Cannot initialize with a nil messageSender")
return
}
// check that participantIndex is legal
if int(participantIndex) >= common.QuorumSize {
err = fmt.Errorf("Invalid participant index!")
return
}
// initialize crypto keys
pubKey, secKey, err := crypto.CreateKeyPair()
if err != nil {
return
}
// create and fill out the participant object
self := new(Participant)
self.Address = messageSender.Address()
self.Address.Id = common.Identifier(participantIndex)
self.PublicKey = pubKey
// calculate the value of an empty hash (default for storedEntropyStage2 on all hosts is a blank array)
emptyHash, err := crypto.CalculateTruncatedHash(s.storedEntropyStage2[:])
if err != nil {
return
}
// set state variables to their defaults
s.messageSender = messageSender
s.AddParticipant(self, participantIndex)
s.secretKey = secKey
for i := range s.previousEntropyStage1 {
s.previousEntropyStage1[i] = emptyHash
}
s.participantIndex = participantIndex
s.currentStep = 1
s.wallets = make(map[string]uint64)
return
}
func TestParticipantCompare(t *testing.T) {
var p0 *Participant
var p1 *Participant
// compare nil values
compare := p0.compare(p1)
if compare == true {
t.Error("Comparing any nil participant should return false")
}
// compare when one is nil
p0 = new(Participant)
compare = p0.compare(p1)
if compare == true {
t.Error("Comparing a zero participant to a nil participant should return false")
}
compare = p1.compare(p0)
if compare == true {
t.Error("Comparing a zero participant to a nil participant should return false")
}
// initialize each participant with a public key
p1 = new(Participant)
pubKey, _, err := crypto.CreateKeyPair()
if err != nil {
t.Fatal(err)
}
p1.publicKey = pubKey
p0.publicKey = new(crypto.PublicKey)
*p0.publicKey = *p1.publicKey
// compare initialized participants
compare = p0.compare(p1)
if !compare {
t.Error("Comparing two zero participants should return true")
}
compare = p1.compare(p0)
if !compare {
t.Error("Comparing two zero participants should return true")
}
// compare when address are not equal
p1.address.Port = 9987
compare = p0.compare(p1)
if compare {
t.Error("Comparing two participants with different addresses should return false")
}
compare = p1.compare(p0)
if compare {
t.Error("Comparing two zero participants with different addresses should return false")
}
// compare when public keys are not equivalent
pubKey, _, err = crypto.CreateKeyPair()
if err != nil {
t.Fatal(err)
}
p1.publicKey = pubKey
compare = p0.compare(p1)
if compare == true {
t.Error("Comparing two participants with different public keys should return false")
}
compare = p1.compare(p0)
if compare == true {
t.Error("Comparing two participants with different public keys should return false")
}
}
// TestHandleSignedHeartbeat should probably be reviewed and rehashed
func TestHandleSignedHeartbeat(t *testing.T) {
// create a state and populate it with the signatories as participants
s, err := CreateState(common.NewZeroNetwork(), 0)
if err != nil {
t.Fatal(err)
}
// create keypairs
pubKey1, secKey1, err := crypto.CreateKeyPair()
if err != nil {
t.Fatal(err)
}
pubKey2, secKey2, err := crypto.CreateKeyPair()
if err != nil {
t.Fatal(err)
}
// create participants and add them to s
p1 := new(Participant)
p2 := new(Participant)
p1.PublicKey = pubKey1
p2.PublicKey = pubKey2
s.AddParticipant(p1, 1)
s.AddParticipant(p2, 2)
// create SignedHeartbeat
var sh signedHeartbeat
sh.heartbeat, err = s.newHeartbeat()
if err != nil {
t.Fatal(err)
}
sh.heartbeatHash, err = crypto.CalculateTruncatedHash([]byte(sh.heartbeat.marshal()))
if err != nil {
t.Fatal(err)
}
sh.signatures = make([]crypto.Signature, 2)
sh.signatories = make([]participantIndex, 2)
// Create a set of signatures for the SignedHeartbeat
signature1, err := crypto.Sign(secKey1, string(sh.heartbeatHash[:]))
if err != nil {
t.Fatal("error signing HeartbeatHash")
}
signature2, err := crypto.Sign(secKey2, signature1.CombinedMessage())
if err != nil {
t.Fatal("error with second signing")
}
// build a valid SignedHeartbeat
sh.signatures[0] = signature1.Signature
sh.signatures[1] = signature2.Signature
sh.signatories[0] = 1
sh.signatories[1] = 2
// handle the signed heartbeat, expecting code 0
msh, err := sh.marshal()
if err != nil {
t.Fatal(err)
}
returnCode := s.handleSignedHeartbeat(msh)
if returnCode != 0 {
t.Fatal("expected heartbeat to succeed:", returnCode)
}
// verify that a repeat heartbeat gets ignored
msh, err = sh.marshal()
if err != nil {
t.Fatal(err)
}
returnCode = s.handleSignedHeartbeat(msh)
if returnCode != 8 {
t.Fatal("expected heartbeat to get ignored as a duplicate:", returnCode)
}
// create a different heartbeat, this will be used to test the fail conditions
sh.heartbeat, err = s.newHeartbeat()
if err != nil {
t.Fatal(err)
}
sh.heartbeatHash, err = crypto.CalculateTruncatedHash([]byte(sh.heartbeat.marshal()))
if err != nil {
t.Fatal(err)
}
// verify a heartbeat with bad signatures is rejected
msh, err = sh.marshal()
if err != nil {
t.Fatal(err)
}
returnCode = s.handleSignedHeartbeat(msh)
if returnCode != 6 {
t.Fatal("expected heartbeat to get ignored as having invalid signatures: ", returnCode)
}
// give heartbeat repeat signatures
signature1, err = crypto.Sign(secKey1, string(sh.heartbeatHash[:]))
if err != nil {
t.Fatal("error with third signing")
}
signature2, err = crypto.Sign(secKey1, signature1.CombinedMessage())
if err != nil {
t.Fatal("error with fourth signing")
}
// adjust signatories slice
sh.signatures[0] = signature1.Signature
sh.signatures[1] = signature2.Signature
sh.signatories[0] = 1
sh.signatories[1] = 1
// verify repeated signatures are rejected
msh, err = sh.marshal()
if err != nil {
t.Fatal(err)
}
returnCode = s.handleSignedHeartbeat(msh)
if returnCode != 5 {
t.Fatal("expected heartbeat to be rejected for duplicate signatures: ", returnCode)
}
// remove second signature
sh.signatures = sh.signatures[:1]
sh.signatories = sh.signatories[:1]
// handle heartbeat when tick is larger than num signatures
s.currentStep = 2
msh, err = sh.marshal()
if err != nil {
t.Fatal(err)
}
returnCode = s.handleSignedHeartbeat(msh)
if returnCode != 2 {
t.Fatal("expected heartbeat to be rejected as out-of-sync: ", returnCode)
}
// send a heartbeat right at the edge of a new block
// test takes time; skip in short tests
if testing.Short() {
t.Skip()
}
// put block at edge
s.currentStep = common.QuorumSize
// submit heartbeat in separate thread
go func() {
msh, err = sh.marshal()
if err != nil {
t.Fatal(err)
}
returnCode = s.handleSignedHeartbeat(msh)
if returnCode != 0 {
t.Fatal("expected heartbeat to succeed!: ", returnCode)
}
}()
time.Sleep(time.Second)
}
func TestHandleSignedHeartbeat(t *testing.T) {
// create a state and populate it with the signatories as participants
s, err := CreateState(common.NewZeroNetwork())
if err != nil {
t.Fatal(err)
}
// create keypairs
pubKey1, secKey1, err := crypto.CreateKeyPair()
if err != nil {
t.Fatal(err)
}
pubKey2, secKey2, err := crypto.CreateKeyPair()
if err != nil {
t.Fatal(err)
}
// create participants and add them to s
var p1 Participant
var p2 Participant
p1.index = 1
p2.index = 2
p1.publicKey = pubKey1
p2.publicKey = pubKey2
err = s.AddNewParticipant(p1, nil)
if err != nil {
t.Fatal(err)
}
s.AddNewParticipant(p2, nil)
if err != nil {
t.Fatal(err)
}
// create SignedHeartbeat
var sh SignedHeartbeat
sh.heartbeat, err = s.newHeartbeat()
if err != nil {
t.Fatal(err)
}
esh, err := sh.heartbeat.GobEncode()
if err != nil {
t.Fatal(err)
}
sh.heartbeatHash, err = crypto.CalculateTruncatedHash(esh)
if err != nil {
t.Fatal(err)
}
sh.signatures = make([]crypto.Signature, 2)
sh.signatories = make([]byte, 2)
// Create a set of signatures for the SignedHeartbeat
signature1, err := secKey1.Sign(sh.heartbeatHash[:])
if err != nil {
t.Fatal(err)
}
combinedMessage, err := signature1.CombinedMessage()
if err != nil {
t.Fatal(err)
}
signature2, err := secKey2.Sign(combinedMessage)
if err != nil {
t.Fatal(err)
}
// build a valid SignedHeartbeat
sh.signatures[0] = signature1.Signature
sh.signatures[1] = signature2.Signature
sh.signatories[0] = 1
sh.signatories[1] = 2
// delete existing heartbeat from state; makes the remaining tests easier
s.heartbeats[sh.signatories[0]] = make(map[crypto.TruncatedHash]*heartbeat)
// handle the signed heartbeat, expecting nil error
err = s.HandleSignedHeartbeat(sh, nil)
if err != nil {
t.Fatal(err)
}
// verify that a repeat heartbeat gets ignored
err = s.HandleSignedHeartbeat(sh, nil)
if err != hsherrHaveHeartbeat {
t.Error("expected heartbeat to get ignored as a duplicate:", err)
}
// create a different heartbeat, this will be used to test the fail conditions
sh.heartbeat, err = s.newHeartbeat()
if err != nil {
t.Fatal(err)
}
ehb, err := sh.heartbeat.GobEncode()
if err != nil {
t.Fatal(err)
}
sh.heartbeatHash, err = crypto.CalculateTruncatedHash(ehb)
if err != nil {
t.Fatal(err)
}
// verify a heartbeat with bad signatures is rejected
err = s.HandleSignedHeartbeat(sh, nil)
if err != hsherrInvalidSignature {
t.Error("expected heartbeat to get ignored as having invalid signatures: ", err)
}
// verify that a non-participant gets rejected
sh.signatories[0] = 3
err = s.HandleSignedHeartbeat(sh, nil)
if err != hsherrNonParticipant {
t.Error("expected non-participant to be rejected: ", err)
}
// give heartbeat repeat signatures
signature1, err = secKey1.Sign(sh.heartbeatHash[:])
if err != nil {
t.Fatal(err)
}
combinedMessage, err = signature1.CombinedMessage()
if err != nil {
t.Fatal(err)
}
signature2, err = secKey1.Sign(combinedMessage)
if err != nil {
t.Error(err)
}
// adjust signatories slice
sh.signatures[0] = signature1.Signature
sh.signatures[1] = signature2.Signature
sh.signatories[0] = 1
sh.signatories[1] = 1
// verify repeated signatures are rejected
err = s.HandleSignedHeartbeat(sh, nil)
if err != hsherrDoubleSigned {
t.Error("expected heartbeat to be rejected for duplicate signatures: ", err)
}
// remove second signature
sh.signatures = sh.signatures[:1]
sh.signatories = sh.signatories[:1]
// handle heartbeat when tick is larger than num signatures
s.stepLock.Lock()
s.currentStep = 2
s.stepLock.Unlock()
err = s.HandleSignedHeartbeat(sh, nil)
if err != hsherrNoSync {
t.Error("expected heartbeat to be rejected as out-of-sync: ", err)
}
// remaining tests require sleep
if testing.Short() {
t.Skip()
}
// send a heartbeat right at the edge of a new block
s.stepLock.Lock()
s.currentStep = common.QuorumSize
s.stepLock.Unlock()
// submit heartbeat in separate thread
go func() {
err = s.HandleSignedHeartbeat(sh, nil)
if err != nil {
t.Fatal("expected heartbeat to succeed!: ", err)
}
// need some way to verify with the test that the funcion gets here
}()
s.stepLock.Lock()
s.currentStep = 1
s.stepLock.Unlock()
time.Sleep(time.Second)
time.Sleep(common.StepDuration)
}