lnd/htlcswitch/switch_test.go

379 lines
9.5 KiB
Go
Raw Normal View History

package htlcswitch
import (
"bytes"
"crypto/sha256"
"testing"
"time"
"github.com/btcsuite/fastsha256"
"github.com/go-errors/errors"
"github.com/lightningnetwork/lnd/lnwire"
"github.com/roasbeef/btcd/chaincfg/chainhash"
"github.com/roasbeef/btcd/wire"
)
var (
hash1, _ = chainhash.NewHash(bytes.Repeat([]byte("a"), 32))
hash2, _ = chainhash.NewHash(bytes.Repeat([]byte("b"), 32))
chanPoint1 = wire.NewOutPoint(hash1, 0)
chanPoint2 = wire.NewOutPoint(hash2, 0)
chanID1 = lnwire.NewChanIDFromOutPoint(chanPoint1)
chanID2 = lnwire.NewChanIDFromOutPoint(chanPoint2)
)
// TestSwitchForward checks the ability of htlc switch to forward add/settle
// requests.
func TestSwitchForward(t *testing.T) {
var packet *htlcPacket
alicePeer := newMockServer(t, "alice")
bobPeer := newMockServer(t, "bob")
aliceChannelLink := newMockChannelLink(chanID1, alicePeer)
bobChannelLink := newMockChannelLink(chanID2, bobPeer)
s := New(Config{})
s.Start()
if err := s.AddLink(aliceChannelLink); err != nil {
t.Fatalf("unable to add alice link: %v", err)
}
if err := s.AddLink(bobChannelLink); err != nil {
t.Fatalf("unable to add bob link: %v", err)
}
// Create request which should be forwarder from alice channel
// link to bob channel link.
preimage := [sha256.Size]byte{1}
rhash := fastsha256.Sum256(preimage[:])
packet = newAddPacket(
aliceChannelLink.ChanID(),
NewHopID(bobChannelLink.Peer().PubKey()),
&lnwire.UpdateAddHTLC{
PaymentHash: rhash,
Amount: 1,
},
)
// Handle the request and checks that bob channel link received it.
if err := s.forward(packet); err != nil {
t.Fatal(err)
}
select {
case <-bobChannelLink.packets:
break
case <-time.After(time.Second):
t.Fatal("request was not propogated to destination")
}
if s.circuits.pending() != 1 {
t.Fatal("wrong amount of circuits")
}
// Create settle request pretending that bob link handled
// the add htlc request and sent the htlc settle request back. This
// request should be forwarder back to alice link.
packet = newSettlePacket(
bobChannelLink.ChanID(),
&lnwire.UpdateFufillHTLC{
PaymentPreimage: preimage,
},
rhash, 1)
// Handle the request and checks that payment circuit works properly.
if err := s.forward(packet); err != nil {
t.Fatal(err)
}
select {
case <-aliceChannelLink.packets:
break
case <-time.After(time.Second):
t.Fatal("request was not propogated to channelPoint")
}
if s.circuits.pending() != 0 {
t.Fatal("wrong amount of circuits")
}
}
// TestSwitchCancel checks that if htlc was rejected we remove unused
// circuits.
func TestSwitchCancel(t *testing.T) {
var request *htlcPacket
alicePeer := newMockServer(t, "alice")
bobPeer := newMockServer(t, "bob")
aliceChannelLink := newMockChannelLink(chanID1, alicePeer)
bobChannelLink := newMockChannelLink(chanID2, bobPeer)
s := New(Config{})
s.Start()
if err := s.AddLink(aliceChannelLink); err != nil {
t.Fatalf("unable to add alice link: %v", err)
}
if err := s.AddLink(bobChannelLink); err != nil {
t.Fatalf("unable to add bob link: %v", err)
}
// Create request which should be forwarder from alice channel link
// to bob channel link.
preimage := [sha256.Size]byte{1}
rhash := fastsha256.Sum256(preimage[:])
request = newAddPacket(
aliceChannelLink.ChanID(),
NewHopID(bobChannelLink.Peer().PubKey()),
&lnwire.UpdateAddHTLC{
PaymentHash: rhash,
Amount: 1,
},
)
// Handle the request and checks that bob channel link received it.
if err := s.forward(request); err != nil {
t.Fatal(err)
}
select {
case <-bobChannelLink.packets:
break
case <-time.After(time.Second):
t.Fatal("request was not propogated to destination")
}
if s.circuits.pending() != 1 {
t.Fatal("wrong amount of circuits")
}
// Create settle request pretending that bob channel link handled
// the add htlc request and sent the htlc settle request back. This
// request should be forwarder back to alice channel link.
request = newFailPacket(
bobChannelLink.ChanID(),
&lnwire.UpdateFailHTLC{},
rhash, 1)
// Handle the request and checks that payment circuit works properly.
if err := s.forward(request); err != nil {
t.Fatal(err)
}
select {
case <-aliceChannelLink.packets:
break
case <-time.After(time.Second):
t.Fatal("request was not propogated to channelPoint")
}
if s.circuits.pending() != 0 {
t.Fatal("wrong amount of circuits")
}
}
// TestSwitchAddSamePayment tests that we send the payment with the same
// payment hash.
func TestSwitchAddSamePayment(t *testing.T) {
var request *htlcPacket
alicePeer := newMockServer(t, "alice")
bobPeer := newMockServer(t, "bob")
aliceChannelLink := newMockChannelLink(chanID1, alicePeer)
bobChannelLink := newMockChannelLink(chanID2, bobPeer)
s := New(Config{})
s.Start()
if err := s.AddLink(aliceChannelLink); err != nil {
t.Fatalf("unable to add alice link: %v", err)
}
if err := s.AddLink(bobChannelLink); err != nil {
t.Fatalf("unable to add bob link: %v", err)
}
// Create request which should be forwarder from alice channel link
// to bob channel link.
preimage := [sha256.Size]byte{1}
rhash := fastsha256.Sum256(preimage[:])
request = newAddPacket(
aliceChannelLink.ChanID(),
NewHopID(bobChannelLink.Peer().PubKey()),
&lnwire.UpdateAddHTLC{
PaymentHash: rhash,
Amount: 1,
},
)
// Handle the request and checks that bob channel link received it.
if err := s.forward(request); err != nil {
t.Fatal(err)
}
select {
case <-bobChannelLink.packets:
break
case <-time.After(time.Second):
t.Fatal("request was not propogated to destination")
}
if s.circuits.pending() != 1 {
t.Fatal("wrong amount of circuits")
}
// Handle the request and checks that bob channel link received it.
if err := s.forward(request); err != nil {
t.Fatal(err)
}
if s.circuits.pending() != 2 {
t.Fatal("wrong amount of circuits")
}
// Create settle request pretending that bob channel link handled
// the add htlc request and sent the htlc settle request back. This
// request should be forwarder back to alice channel link.
request = newFailPacket(
bobChannelLink.ChanID(),
&lnwire.UpdateFailHTLC{},
rhash, 1)
// Handle the request and checks that payment circuit works properly.
if err := s.forward(request); err != nil {
t.Fatal(err)
}
select {
case <-aliceChannelLink.packets:
break
case <-time.After(time.Second):
t.Fatal("request was not propogated to channelPoint")
}
if s.circuits.pending() != 1 {
t.Fatal("wrong amount of circuits")
}
// Handle the request and checks that payment circuit works properly.
if err := s.forward(request); err != nil {
t.Fatal(err)
}
select {
case <-aliceChannelLink.packets:
break
case <-time.After(time.Second):
t.Fatal("request was not propogated to channelPoint")
}
if s.circuits.pending() != 0 {
t.Fatal("wrong amount of circuits")
}
}
// TestSwitchSendPayment tests ability of htlc switch to respond to the
// users when response is came back from channel link.
func TestSwitchSendPayment(t *testing.T) {
alicePeer := newMockServer(t, "alice")
aliceChannelLink := newMockChannelLink(chanID1, alicePeer)
s := New(Config{})
s.Start()
if err := s.AddLink(aliceChannelLink); err != nil {
t.Fatalf("unable to add link: %v", err)
}
// Create request which should be forwarder from alice channel link
// to bob channel link.
preimage := [sha256.Size]byte{1}
rhash := fastsha256.Sum256(preimage[:])
update := &lnwire.UpdateAddHTLC{
PaymentHash: rhash,
Amount: 1,
}
// Handle the request and checks that bob channel link received it.
errChan := make(chan error)
go func() {
_, err := s.SendHTLC(aliceChannelLink.Peer().PubKey(), update)
errChan <- err
}()
go func() {
// Send the payment with the same payment hash and same
// amount and check that it will be propagated successfully
_, err := s.SendHTLC(aliceChannelLink.Peer().PubKey(), update)
errChan <- err
}()
select {
case <-aliceChannelLink.packets:
break
case err := <-errChan:
t.Fatalf("unable to send payment: %v", err)
case <-time.After(time.Second):
t.Fatal("request was not propogated to destination")
}
select {
case <-aliceChannelLink.packets:
break
case err := <-errChan:
t.Fatalf("unable to send payment: %v", err)
case <-time.After(time.Second):
t.Fatal("request was not propogated to destination")
}
if s.numPendingPayments() != 2 {
t.Fatal("wrong amount of pending payments")
}
if s.circuits.pending() != 0 {
t.Fatal("wrong amount of circuits")
}
// Create fail request pretending that bob channel link handled
// the add htlc request with error and sent the htlc fail request
// back. This request should be forwarder back to alice channel link.
packet := newFailPacket(aliceChannelLink.ChanID(),
&lnwire.UpdateFailHTLC{
Reason: []byte{byte(lnwire.IncorrectValue)},
ID: 1,
},
rhash, 1)
if err := s.forward(packet); err != nil {
t.Fatalf("can't forward htlc packet: %v", err)
}
select {
case err := <-errChan:
if err.Error() != errors.New(lnwire.IncorrectValue).Error() {
t.Fatal("err wasn't received")
}
case <-time.After(time.Second):
t.Fatal("err wasn't received")
}
// Send second failure response and check that user were able to
// receive the error.
if err := s.forward(packet); err != nil {
t.Fatalf("can't forward htlc packet: %v", err)
}
select {
case err := <-errChan:
if err.Error() != errors.New(lnwire.IncorrectValue).Error() {
t.Fatal("err wasn't received")
}
case <-time.After(time.Second):
t.Fatal("err wasn't received")
}
if s.numPendingPayments() != 0 {
t.Fatal("wrong amount of pending payments")
}
}