1932 lines
53 KiB
Go
1932 lines
53 KiB
Go
package htlcswitch
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import (
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"crypto/rand"
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"crypto/sha256"
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"fmt"
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"io"
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"io/ioutil"
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"testing"
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"time"
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"github.com/btcsuite/btcutil"
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"github.com/btcsuite/fastsha256"
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"github.com/davecgh/go-spew/spew"
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"github.com/go-errors/errors"
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"github.com/lightningnetwork/lnd/channeldb"
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"github.com/lightningnetwork/lnd/lnwire"
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)
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func genPreimage() ([32]byte, error) {
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var preimage [32]byte
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if _, err := io.ReadFull(rand.Reader, preimage[:]); err != nil {
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return preimage, err
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}
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return preimage, nil
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}
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// TestSwitchAddDuplicateLink tests that the switch will reject duplicate links
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// for both pending and live links. It also tests that we can successfully
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// add a link after having removed it.
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func TestSwitchAddDuplicateLink(t *testing.T) {
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t.Parallel()
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alicePeer, err := newMockServer(t, "alice", testStartingHeight, nil, 6)
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if err != nil {
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t.Fatalf("unable to create alice server: %v", err)
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}
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s, err := initSwitchWithDB(testStartingHeight, nil)
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if err != nil {
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t.Fatalf("unable to init switch: %v", err)
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}
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if err := s.Start(); err != nil {
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t.Fatalf("unable to start switch: %v", err)
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}
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defer s.Stop()
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chanID1, _, aliceChanID, _ := genIDs()
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pendingChanID := lnwire.ShortChannelID{}
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aliceChannelLink := newMockChannelLink(
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s, chanID1, pendingChanID, alicePeer, false,
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)
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if err := s.AddLink(aliceChannelLink); err != nil {
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t.Fatalf("unable to add alice link: %v", err)
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}
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// Alice should have a pending link, adding again should fail.
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if err := s.AddLink(aliceChannelLink); err == nil {
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t.Fatalf("adding duplicate link should have failed")
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}
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// Update the short chan id of the channel, so that the link goes live.
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aliceChannelLink.setLiveShortChanID(aliceChanID)
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err = s.UpdateShortChanID(chanID1)
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if err != nil {
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t.Fatalf("unable to update alice short_chan_id: %v", err)
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}
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// Alice should have a live link, adding again should fail.
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if err := s.AddLink(aliceChannelLink); err == nil {
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t.Fatalf("adding duplicate link should have failed")
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}
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// Remove the live link to ensure the indexes are cleared.
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s.RemoveLink(chanID1)
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// Alice has no links, adding should succeed.
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if err := s.AddLink(aliceChannelLink); err != nil {
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t.Fatalf("unable to add alice link: %v", err)
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}
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}
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// TestSwitchSendPending checks the inability of htlc switch to forward adds
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// over pending links, and the UpdateShortChanID makes a pending link live.
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func TestSwitchSendPending(t *testing.T) {
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t.Parallel()
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alicePeer, err := newMockServer(t, "alice", testStartingHeight, nil, 6)
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if err != nil {
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t.Fatalf("unable to create alice server: %v", err)
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}
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s, err := initSwitchWithDB(testStartingHeight, nil)
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if err != nil {
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t.Fatalf("unable to init switch: %v", err)
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}
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if err := s.Start(); err != nil {
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t.Fatalf("unable to start switch: %v", err)
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}
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defer s.Stop()
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chanID1, _, aliceChanID, bobChanID := genIDs()
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pendingChanID := lnwire.ShortChannelID{}
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aliceChannelLink := newMockChannelLink(
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s, chanID1, pendingChanID, alicePeer, false,
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)
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if err := s.AddLink(aliceChannelLink); err != nil {
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t.Fatalf("unable to add alice link: %v", err)
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}
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// Create request which should is being forwarded from Bob channel
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// link to Alice channel link.
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preimage, err := genPreimage()
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if err != nil {
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t.Fatalf("unable to generate preimage: %v", err)
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}
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rhash := fastsha256.Sum256(preimage[:])
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packet := &htlcPacket{
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incomingChanID: bobChanID,
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incomingHTLCID: 0,
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outgoingChanID: aliceChanID,
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obfuscator: NewMockObfuscator(),
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htlc: &lnwire.UpdateAddHTLC{
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PaymentHash: rhash,
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Amount: 1,
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},
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}
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// Send the ADD packet, this should not be forwarded out to the link
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// since there are no eligible links.
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err = s.forward(packet)
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expErr := fmt.Sprintf("unable to find link with destination %v",
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aliceChanID)
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if err != nil && err.Error() != expErr {
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t.Fatalf("expected forward failure: %v", err)
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}
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// No message should be sent, since the packet was failed.
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select {
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case <-aliceChannelLink.packets:
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t.Fatal("expected not to receive message")
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case <-time.After(time.Second):
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}
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// Since the packet should have been failed, there should be no active
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// circuits.
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if s.circuits.NumOpen() != 0 {
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t.Fatal("wrong amount of circuits")
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}
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// Now, update Alice's link with her final short channel id. This should
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// move the link to the live state.
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aliceChannelLink.setLiveShortChanID(aliceChanID)
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err = s.UpdateShortChanID(chanID1)
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if err != nil {
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t.Fatalf("unable to update alice short_chan_id: %v", err)
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}
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// Increment the packet's HTLC index, so that it does not collide with
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// the prior attempt.
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packet.incomingHTLCID++
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// Handle the request and checks that bob channel link received it.
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if err := s.forward(packet); err != nil {
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t.Fatalf("unexpected forward failure: %v", err)
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}
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// Since Alice's link is now active, this packet should succeed.
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select {
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case <-aliceChannelLink.packets:
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case <-time.After(time.Second):
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t.Fatal("request was not propagated to alice")
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}
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}
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// TestSwitchForward checks the ability of htlc switch to forward add/settle
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// requests.
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func TestSwitchForward(t *testing.T) {
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t.Parallel()
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alicePeer, err := newMockServer(t, "alice", testStartingHeight, nil, 6)
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if err != nil {
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t.Fatalf("unable to create alice server: %v", err)
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}
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bobPeer, err := newMockServer(t, "bob", testStartingHeight, nil, 6)
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if err != nil {
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t.Fatalf("unable to create bob server: %v", err)
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}
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s, err := initSwitchWithDB(testStartingHeight, nil)
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if err != nil {
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t.Fatalf("unable to init switch: %v", err)
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}
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if err := s.Start(); err != nil {
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t.Fatalf("unable to start switch: %v", err)
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}
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defer s.Stop()
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chanID1, chanID2, aliceChanID, bobChanID := genIDs()
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aliceChannelLink := newMockChannelLink(
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s, chanID1, aliceChanID, alicePeer, true,
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)
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bobChannelLink := newMockChannelLink(
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s, chanID2, bobChanID, bobPeer, true,
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)
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if err := s.AddLink(aliceChannelLink); err != nil {
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t.Fatalf("unable to add alice link: %v", err)
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}
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if err := s.AddLink(bobChannelLink); err != nil {
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t.Fatalf("unable to add bob link: %v", err)
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}
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// Create request which should be forwarded from Alice channel link to
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// bob channel link.
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preimage, err := genPreimage()
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if err != nil {
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t.Fatalf("unable to generate preimage: %v", err)
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}
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rhash := fastsha256.Sum256(preimage[:])
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packet := &htlcPacket{
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incomingChanID: aliceChannelLink.ShortChanID(),
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incomingHTLCID: 0,
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outgoingChanID: bobChannelLink.ShortChanID(),
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obfuscator: NewMockObfuscator(),
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htlc: &lnwire.UpdateAddHTLC{
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PaymentHash: rhash,
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Amount: 1,
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},
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}
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// Handle the request and checks that bob channel link received it.
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if err := s.forward(packet); err != nil {
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t.Fatal(err)
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}
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select {
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case <-bobChannelLink.packets:
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if err := bobChannelLink.completeCircuit(packet); err != nil {
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t.Fatalf("unable to complete payment circuit: %v", err)
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}
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case <-time.After(time.Second):
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t.Fatal("request was not propagated to destination")
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}
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if s.circuits.NumOpen() != 1 {
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t.Fatal("wrong amount of circuits")
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}
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// Create settle request pretending that bob link handled the add htlc
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// request and sent the htlc settle request back. This request should
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// be forwarder back to Alice link.
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packet = &htlcPacket{
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outgoingChanID: bobChannelLink.ShortChanID(),
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outgoingHTLCID: 0,
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amount: 1,
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htlc: &lnwire.UpdateFulfillHTLC{
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PaymentPreimage: preimage,
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},
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}
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// Handle the request and checks that payment circuit works properly.
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if err := s.forward(packet); err != nil {
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t.Fatal(err)
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}
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select {
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case pkt := <-aliceChannelLink.packets:
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if err := aliceChannelLink.deleteCircuit(pkt); err != nil {
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t.Fatalf("unable to remove circuit: %v", err)
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}
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case <-time.After(time.Second):
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t.Fatal("request was not propagated to channelPoint")
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}
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if s.circuits.NumOpen() != 0 {
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t.Fatal("wrong amount of circuits")
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}
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}
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func TestSwitchForwardFailAfterFullAdd(t *testing.T) {
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t.Parallel()
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chanID1, chanID2, aliceChanID, bobChanID := genIDs()
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alicePeer, err := newMockServer(t, "alice", testStartingHeight, nil, 6)
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if err != nil {
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t.Fatalf("unable to create alice server: %v", err)
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}
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bobPeer, err := newMockServer(t, "bob", testStartingHeight, nil, 6)
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if err != nil {
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t.Fatalf("unable to create bob server: %v", err)
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}
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tempPath, err := ioutil.TempDir("", "circuitdb")
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if err != nil {
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t.Fatalf("unable to temporary path: %v", err)
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}
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cdb, err := channeldb.Open(tempPath)
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if err != nil {
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t.Fatalf("unable to open channeldb: %v", err)
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}
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s, err := initSwitchWithDB(testStartingHeight, cdb)
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if err != nil {
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t.Fatalf("unable to init switch: %v", err)
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}
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if err := s.Start(); err != nil {
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t.Fatalf("unable to start switch: %v", err)
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}
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// Even though we intend to Stop s later in the test, it is safe to
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// defer this Stop since its execution it is protected by an atomic
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// guard, guaranteeing it executes at most once.
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defer s.Stop()
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aliceChannelLink := newMockChannelLink(
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s, chanID1, aliceChanID, alicePeer, true,
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)
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bobChannelLink := newMockChannelLink(
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s, chanID2, bobChanID, bobPeer, true,
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)
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if err := s.AddLink(aliceChannelLink); err != nil {
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t.Fatalf("unable to add alice link: %v", err)
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}
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if err := s.AddLink(bobChannelLink); err != nil {
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t.Fatalf("unable to add bob link: %v", err)
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}
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// Create request which should be forwarded from Alice channel link to
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// bob channel link.
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preimage := [sha256.Size]byte{1}
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rhash := fastsha256.Sum256(preimage[:])
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ogPacket := &htlcPacket{
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incomingChanID: aliceChannelLink.ShortChanID(),
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incomingHTLCID: 0,
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outgoingChanID: bobChannelLink.ShortChanID(),
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obfuscator: NewMockObfuscator(),
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htlc: &lnwire.UpdateAddHTLC{
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PaymentHash: rhash,
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Amount: 1,
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},
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}
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if s.circuits.NumPending() != 0 {
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t.Fatalf("wrong amount of half circuits")
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}
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if s.circuits.NumOpen() != 0 {
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t.Fatalf("wrong amount of circuits")
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}
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// Handle the request and checks that bob channel link received it.
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if err := s.forward(ogPacket); err != nil {
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t.Fatal(err)
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}
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if s.circuits.NumPending() != 1 {
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t.Fatalf("wrong amount of half circuits")
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}
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if s.circuits.NumOpen() != 0 {
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t.Fatalf("wrong amount of circuits")
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}
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// Pull packet from bob's link, but do not perform a full add.
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select {
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case packet := <-bobChannelLink.packets:
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// Complete the payment circuit and assign the outgoing htlc id
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// before restarting.
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if err := bobChannelLink.completeCircuit(packet); err != nil {
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t.Fatalf("unable to complete payment circuit: %v", err)
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}
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case <-time.After(time.Second):
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t.Fatal("request was not propagated to destination")
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}
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if s.circuits.NumPending() != 1 {
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t.Fatalf("wrong amount of half circuits")
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}
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if s.circuits.NumOpen() != 1 {
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t.Fatalf("wrong amount of circuits")
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}
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// Now we will restart bob, leaving the forwarding decision for this
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// htlc is in the half-added state.
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if err := s.Stop(); err != nil {
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t.Fatalf(err.Error())
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}
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if err := cdb.Close(); err != nil {
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t.Fatalf(err.Error())
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}
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cdb2, err := channeldb.Open(tempPath)
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if err != nil {
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t.Fatalf("unable to reopen channeldb: %v", err)
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}
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s2, err := initSwitchWithDB(testStartingHeight, cdb2)
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if err != nil {
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t.Fatalf("unable reinit switch: %v", err)
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}
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if err := s2.Start(); err != nil {
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t.Fatalf("unable to restart switch: %v", err)
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}
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// Even though we intend to Stop s2 later in the test, it is safe to
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// defer this Stop since its execution it is protected by an atomic
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// guard, guaranteeing it executes at most once.
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defer s2.Stop()
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aliceChannelLink = newMockChannelLink(
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s2, chanID1, aliceChanID, alicePeer, true,
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)
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bobChannelLink = newMockChannelLink(
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s2, chanID2, bobChanID, bobPeer, true,
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)
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if err := s2.AddLink(aliceChannelLink); err != nil {
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t.Fatalf("unable to add alice link: %v", err)
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}
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if err := s2.AddLink(bobChannelLink); err != nil {
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t.Fatalf("unable to add bob link: %v", err)
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}
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if s2.circuits.NumPending() != 1 {
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t.Fatalf("wrong amount of half circuits")
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}
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if s2.circuits.NumOpen() != 1 {
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t.Fatalf("wrong amount of circuits")
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}
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// Craft a failure message from the remote peer.
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fail := &htlcPacket{
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outgoingChanID: bobChannelLink.ShortChanID(),
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outgoingHTLCID: 0,
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amount: 1,
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htlc: &lnwire.UpdateFailHTLC{},
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}
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// Send the fail packet from the remote peer through the switch.
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if err := s2.forward(fail); err != nil {
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t.Fatalf(err.Error())
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}
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// Pull packet from alice's link, as it should have gone through
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// successfully.
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select {
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case pkt := <-aliceChannelLink.packets:
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if err := aliceChannelLink.completeCircuit(pkt); err != nil {
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t.Fatalf("unable to remove circuit: %v", err)
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}
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case <-time.After(time.Second):
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t.Fatal("request was not propagated to destination")
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}
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// Circuit map should be empty now.
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if s2.circuits.NumPending() != 0 {
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t.Fatalf("wrong amount of half circuits")
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}
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if s2.circuits.NumOpen() != 0 {
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t.Fatalf("wrong amount of circuits")
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}
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// Send the fail packet from the remote peer through the switch.
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if err := s2.forward(fail); err == nil {
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t.Fatalf("expected failure when sending duplicate fail " +
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"with no pending circuit")
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}
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}
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func TestSwitchForwardSettleAfterFullAdd(t *testing.T) {
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t.Parallel()
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chanID1, chanID2, aliceChanID, bobChanID := genIDs()
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alicePeer, err := newMockServer(t, "alice", testStartingHeight, nil, 6)
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if err != nil {
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t.Fatalf("unable to create alice server: %v", err)
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}
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bobPeer, err := newMockServer(t, "bob", testStartingHeight, nil, 6)
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if err != nil {
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t.Fatalf("unable to create bob server: %v", err)
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}
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tempPath, err := ioutil.TempDir("", "circuitdb")
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if err != nil {
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t.Fatalf("unable to temporary path: %v", err)
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}
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cdb, err := channeldb.Open(tempPath)
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if err != nil {
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t.Fatalf("unable to open channeldb: %v", err)
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}
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s, err := initSwitchWithDB(testStartingHeight, cdb)
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if err != nil {
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t.Fatalf("unable to init switch: %v", err)
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}
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if err := s.Start(); err != nil {
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t.Fatalf("unable to start switch: %v", err)
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}
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// Even though we intend to Stop s later in the test, it is safe to
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// defer this Stop since its execution it is protected by an atomic
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// guard, guaranteeing it executes at most once.
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defer s.Stop()
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aliceChannelLink := newMockChannelLink(
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s, chanID1, aliceChanID, alicePeer, true,
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)
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bobChannelLink := newMockChannelLink(
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s, chanID2, bobChanID, bobPeer, true,
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|
)
|
|
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 forwarded from Alice channel link to
|
|
// bob channel link.
|
|
preimage := [sha256.Size]byte{1}
|
|
rhash := fastsha256.Sum256(preimage[:])
|
|
ogPacket := &htlcPacket{
|
|
incomingChanID: aliceChannelLink.ShortChanID(),
|
|
incomingHTLCID: 0,
|
|
outgoingChanID: bobChannelLink.ShortChanID(),
|
|
obfuscator: NewMockObfuscator(),
|
|
htlc: &lnwire.UpdateAddHTLC{
|
|
PaymentHash: rhash,
|
|
Amount: 1,
|
|
},
|
|
}
|
|
|
|
if s.circuits.NumPending() != 0 {
|
|
t.Fatalf("wrong amount of half circuits")
|
|
}
|
|
if s.circuits.NumOpen() != 0 {
|
|
t.Fatalf("wrong amount of circuits")
|
|
}
|
|
|
|
// Handle the request and checks that bob channel link received it.
|
|
if err := s.forward(ogPacket); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
if s.circuits.NumPending() != 1 {
|
|
t.Fatalf("wrong amount of half circuits")
|
|
}
|
|
if s.circuits.NumOpen() != 0 {
|
|
t.Fatalf("wrong amount of circuits")
|
|
}
|
|
|
|
// Pull packet from bob's link, but do not perform a full add.
|
|
select {
|
|
case packet := <-bobChannelLink.packets:
|
|
// Complete the payment circuit and assign the outgoing htlc id
|
|
// before restarting.
|
|
if err := bobChannelLink.completeCircuit(packet); err != nil {
|
|
t.Fatalf("unable to complete payment circuit: %v", err)
|
|
}
|
|
|
|
case <-time.After(time.Second):
|
|
t.Fatal("request was not propagated to destination")
|
|
}
|
|
|
|
if s.circuits.NumPending() != 1 {
|
|
t.Fatalf("wrong amount of half circuits")
|
|
}
|
|
if s.circuits.NumOpen() != 1 {
|
|
t.Fatalf("wrong amount of circuits")
|
|
}
|
|
|
|
// Now we will restart bob, leaving the forwarding decision for this
|
|
// htlc is in the half-added state.
|
|
if err := s.Stop(); err != nil {
|
|
t.Fatalf(err.Error())
|
|
}
|
|
|
|
if err := cdb.Close(); err != nil {
|
|
t.Fatalf(err.Error())
|
|
}
|
|
|
|
cdb2, err := channeldb.Open(tempPath)
|
|
if err != nil {
|
|
t.Fatalf("unable to reopen channeldb: %v", err)
|
|
}
|
|
|
|
s2, err := initSwitchWithDB(testStartingHeight, cdb2)
|
|
if err != nil {
|
|
t.Fatalf("unable reinit switch: %v", err)
|
|
}
|
|
if err := s2.Start(); err != nil {
|
|
t.Fatalf("unable to restart switch: %v", err)
|
|
}
|
|
|
|
// Even though we intend to Stop s2 later in the test, it is safe to
|
|
// defer this Stop since its execution it is protected by an atomic
|
|
// guard, guaranteeing it executes at most once.
|
|
defer s2.Stop()
|
|
|
|
aliceChannelLink = newMockChannelLink(
|
|
s2, chanID1, aliceChanID, alicePeer, true,
|
|
)
|
|
bobChannelLink = newMockChannelLink(
|
|
s2, chanID2, bobChanID, bobPeer, true,
|
|
)
|
|
if err := s2.AddLink(aliceChannelLink); err != nil {
|
|
t.Fatalf("unable to add alice link: %v", err)
|
|
}
|
|
if err := s2.AddLink(bobChannelLink); err != nil {
|
|
t.Fatalf("unable to add bob link: %v", err)
|
|
}
|
|
|
|
if s2.circuits.NumPending() != 1 {
|
|
t.Fatalf("wrong amount of half circuits")
|
|
}
|
|
if s2.circuits.NumOpen() != 1 {
|
|
t.Fatalf("wrong amount of circuits")
|
|
}
|
|
|
|
// Craft a settle message from the remote peer.
|
|
settle := &htlcPacket{
|
|
outgoingChanID: bobChannelLink.ShortChanID(),
|
|
outgoingHTLCID: 0,
|
|
amount: 1,
|
|
htlc: &lnwire.UpdateFulfillHTLC{
|
|
PaymentPreimage: preimage,
|
|
},
|
|
}
|
|
|
|
// Send the settle packet from the remote peer through the switch.
|
|
if err := s2.forward(settle); err != nil {
|
|
t.Fatalf(err.Error())
|
|
}
|
|
|
|
// Pull packet from alice's link, as it should have gone through
|
|
// successfully.
|
|
select {
|
|
case packet := <-aliceChannelLink.packets:
|
|
if err := aliceChannelLink.completeCircuit(packet); err != nil {
|
|
t.Fatalf("unable to complete circuit with in key=%s: %v",
|
|
packet.inKey(), err)
|
|
}
|
|
case <-time.After(time.Second):
|
|
t.Fatal("request was not propagated to destination")
|
|
}
|
|
|
|
// Circuit map should be empty now.
|
|
if s2.circuits.NumPending() != 0 {
|
|
t.Fatalf("wrong amount of half circuits")
|
|
}
|
|
if s2.circuits.NumOpen() != 0 {
|
|
t.Fatalf("wrong amount of circuits")
|
|
}
|
|
|
|
// Send the settle packet again, which should fail.
|
|
if err := s2.forward(settle); err == nil {
|
|
t.Fatalf("expected failure when sending duplicate settle " +
|
|
"with no pending circuit")
|
|
}
|
|
}
|
|
|
|
func TestSwitchForwardDropAfterFullAdd(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
chanID1, chanID2, aliceChanID, bobChanID := genIDs()
|
|
|
|
alicePeer, err := newMockServer(t, "alice", testStartingHeight, nil, 6)
|
|
if err != nil {
|
|
t.Fatalf("unable to create alice server: %v", err)
|
|
}
|
|
bobPeer, err := newMockServer(t, "bob", testStartingHeight, nil, 6)
|
|
if err != nil {
|
|
t.Fatalf("unable to create bob server: %v", err)
|
|
}
|
|
|
|
tempPath, err := ioutil.TempDir("", "circuitdb")
|
|
if err != nil {
|
|
t.Fatalf("unable to temporary path: %v", err)
|
|
}
|
|
|
|
cdb, err := channeldb.Open(tempPath)
|
|
if err != nil {
|
|
t.Fatalf("unable to open channeldb: %v", err)
|
|
}
|
|
|
|
s, err := initSwitchWithDB(testStartingHeight, cdb)
|
|
if err != nil {
|
|
t.Fatalf("unable to init switch: %v", err)
|
|
}
|
|
if err := s.Start(); err != nil {
|
|
t.Fatalf("unable to start switch: %v", err)
|
|
}
|
|
|
|
// Even though we intend to Stop s later in the test, it is safe to
|
|
// defer this Stop since its execution it is protected by an atomic
|
|
// guard, guaranteeing it executes at most once.
|
|
defer s.Stop()
|
|
|
|
aliceChannelLink := newMockChannelLink(
|
|
s, chanID1, aliceChanID, alicePeer, true,
|
|
)
|
|
bobChannelLink := newMockChannelLink(
|
|
s, chanID2, bobChanID, bobPeer, true,
|
|
)
|
|
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 forwarded from Alice channel link to
|
|
// bob channel link.
|
|
preimage := [sha256.Size]byte{1}
|
|
rhash := fastsha256.Sum256(preimage[:])
|
|
ogPacket := &htlcPacket{
|
|
incomingChanID: aliceChannelLink.ShortChanID(),
|
|
incomingHTLCID: 0,
|
|
outgoingChanID: bobChannelLink.ShortChanID(),
|
|
obfuscator: NewMockObfuscator(),
|
|
htlc: &lnwire.UpdateAddHTLC{
|
|
PaymentHash: rhash,
|
|
Amount: 1,
|
|
},
|
|
}
|
|
|
|
if s.circuits.NumPending() != 0 {
|
|
t.Fatalf("wrong amount of half circuits")
|
|
}
|
|
if s.circuits.NumOpen() != 0 {
|
|
t.Fatalf("wrong amount of circuits")
|
|
}
|
|
|
|
// Handle the request and checks that bob channel link received it.
|
|
if err := s.forward(ogPacket); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
if s.circuits.NumPending() != 1 {
|
|
t.Fatalf("wrong amount of half circuits")
|
|
}
|
|
if s.circuits.NumOpen() != 0 {
|
|
t.Fatalf("wrong amount of half circuits")
|
|
}
|
|
|
|
// Pull packet from bob's link, but do not perform a full add.
|
|
select {
|
|
case packet := <-bobChannelLink.packets:
|
|
// Complete the payment circuit and assign the outgoing htlc id
|
|
// before restarting.
|
|
if err := bobChannelLink.completeCircuit(packet); err != nil {
|
|
t.Fatalf("unable to complete payment circuit: %v", err)
|
|
}
|
|
case <-time.After(time.Second):
|
|
t.Fatal("request was not propagated to destination")
|
|
}
|
|
|
|
// Now we will restart bob, leaving the forwarding decision for this
|
|
// htlc is in the half-added state.
|
|
if err := s.Stop(); err != nil {
|
|
t.Fatalf(err.Error())
|
|
}
|
|
|
|
if err := cdb.Close(); err != nil {
|
|
t.Fatalf(err.Error())
|
|
}
|
|
|
|
cdb2, err := channeldb.Open(tempPath)
|
|
if err != nil {
|
|
t.Fatalf("unable to reopen channeldb: %v", err)
|
|
}
|
|
|
|
s2, err := initSwitchWithDB(testStartingHeight, cdb2)
|
|
if err != nil {
|
|
t.Fatalf("unable reinit switch: %v", err)
|
|
}
|
|
if err := s2.Start(); err != nil {
|
|
t.Fatalf("unable to restart switch: %v", err)
|
|
}
|
|
|
|
// Even though we intend to Stop s2 later in the test, it is safe to
|
|
// defer this Stop since its execution it is protected by an atomic
|
|
// guard, guaranteeing it executes at most once.
|
|
defer s2.Stop()
|
|
|
|
aliceChannelLink = newMockChannelLink(
|
|
s2, chanID1, aliceChanID, alicePeer, true,
|
|
)
|
|
bobChannelLink = newMockChannelLink(
|
|
s2, chanID2, bobChanID, bobPeer, true,
|
|
)
|
|
if err := s2.AddLink(aliceChannelLink); err != nil {
|
|
t.Fatalf("unable to add alice link: %v", err)
|
|
}
|
|
if err := s2.AddLink(bobChannelLink); err != nil {
|
|
t.Fatalf("unable to add bob link: %v", err)
|
|
}
|
|
|
|
if s2.circuits.NumPending() != 1 {
|
|
t.Fatalf("wrong amount of half circuits")
|
|
}
|
|
if s2.circuits.NumOpen() != 1 {
|
|
t.Fatalf("wrong amount of half circuits")
|
|
}
|
|
|
|
// Resend the failed htlc, it should be returned to alice since the
|
|
// switch will detect that it has been half added previously.
|
|
err = s2.forward(ogPacket)
|
|
if err != ErrDuplicateAdd {
|
|
t.Fatal("unexpected error when reforwarding a "+
|
|
"failed packet", err)
|
|
}
|
|
|
|
// After detecting an incomplete forward, the fail packet should have
|
|
// been returned to the sender.
|
|
select {
|
|
case <-aliceChannelLink.packets:
|
|
t.Fatal("request should not have returned to source")
|
|
case <-bobChannelLink.packets:
|
|
t.Fatal("request should not have forwarded to destination")
|
|
case <-time.After(time.Second):
|
|
}
|
|
}
|
|
|
|
func TestSwitchForwardFailAfterHalfAdd(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
chanID1, chanID2, aliceChanID, bobChanID := genIDs()
|
|
|
|
alicePeer, err := newMockServer(t, "alice", testStartingHeight, nil, 6)
|
|
if err != nil {
|
|
t.Fatalf("unable to create alice server: %v", err)
|
|
}
|
|
bobPeer, err := newMockServer(t, "bob", testStartingHeight, nil, 6)
|
|
if err != nil {
|
|
t.Fatalf("unable to create bob server: %v", err)
|
|
}
|
|
|
|
tempPath, err := ioutil.TempDir("", "circuitdb")
|
|
if err != nil {
|
|
t.Fatalf("unable to temporary path: %v", err)
|
|
}
|
|
|
|
cdb, err := channeldb.Open(tempPath)
|
|
if err != nil {
|
|
t.Fatalf("unable to open channeldb: %v", err)
|
|
}
|
|
|
|
s, err := initSwitchWithDB(testStartingHeight, cdb)
|
|
if err != nil {
|
|
t.Fatalf("unable to init switch: %v", err)
|
|
}
|
|
if err := s.Start(); err != nil {
|
|
t.Fatalf("unable to start switch: %v", err)
|
|
}
|
|
|
|
// Even though we intend to Stop s later in the test, it is safe to
|
|
// defer this Stop since its execution it is protected by an atomic
|
|
// guard, guaranteeing it executes at most once.
|
|
defer s.Stop()
|
|
|
|
aliceChannelLink := newMockChannelLink(
|
|
s, chanID1, aliceChanID, alicePeer, true,
|
|
)
|
|
bobChannelLink := newMockChannelLink(
|
|
s, chanID2, bobChanID, bobPeer, true,
|
|
)
|
|
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 forwarded from Alice channel link to
|
|
// bob channel link.
|
|
preimage := [sha256.Size]byte{1}
|
|
rhash := fastsha256.Sum256(preimage[:])
|
|
ogPacket := &htlcPacket{
|
|
incomingChanID: aliceChannelLink.ShortChanID(),
|
|
incomingHTLCID: 0,
|
|
outgoingChanID: bobChannelLink.ShortChanID(),
|
|
obfuscator: NewMockObfuscator(),
|
|
htlc: &lnwire.UpdateAddHTLC{
|
|
PaymentHash: rhash,
|
|
Amount: 1,
|
|
},
|
|
}
|
|
|
|
if s.circuits.NumPending() != 0 {
|
|
t.Fatalf("wrong amount of half circuits")
|
|
}
|
|
if s.circuits.NumOpen() != 0 {
|
|
t.Fatalf("wrong amount of circuits")
|
|
}
|
|
|
|
// Handle the request and checks that bob channel link received it.
|
|
if err := s.forward(ogPacket); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
if s.circuits.NumPending() != 1 {
|
|
t.Fatalf("wrong amount of half circuits")
|
|
}
|
|
if s.circuits.NumOpen() != 0 {
|
|
t.Fatalf("wrong amount of half circuits")
|
|
}
|
|
|
|
// Pull packet from bob's link, but do not perform a full add.
|
|
select {
|
|
case <-bobChannelLink.packets:
|
|
case <-time.After(time.Second):
|
|
t.Fatal("request was not propagated to destination")
|
|
}
|
|
|
|
// Now we will restart bob, leaving the forwarding decision for this
|
|
// htlc is in the half-added state.
|
|
if err := s.Stop(); err != nil {
|
|
t.Fatalf(err.Error())
|
|
}
|
|
|
|
if err := cdb.Close(); err != nil {
|
|
t.Fatalf(err.Error())
|
|
}
|
|
|
|
cdb2, err := channeldb.Open(tempPath)
|
|
if err != nil {
|
|
t.Fatalf("unable to reopen channeldb: %v", err)
|
|
}
|
|
|
|
s2, err := initSwitchWithDB(testStartingHeight, cdb2)
|
|
if err != nil {
|
|
t.Fatalf("unable reinit switch: %v", err)
|
|
}
|
|
if err := s2.Start(); err != nil {
|
|
t.Fatalf("unable to restart switch: %v", err)
|
|
}
|
|
|
|
// Even though we intend to Stop s2 later in the test, it is safe to
|
|
// defer this Stop since its execution it is protected by an atomic
|
|
// guard, guaranteeing it executes at most once.
|
|
defer s2.Stop()
|
|
|
|
aliceChannelLink = newMockChannelLink(
|
|
s2, chanID1, aliceChanID, alicePeer, true,
|
|
)
|
|
bobChannelLink = newMockChannelLink(
|
|
s2, chanID2, bobChanID, bobPeer, true,
|
|
)
|
|
if err := s2.AddLink(aliceChannelLink); err != nil {
|
|
t.Fatalf("unable to add alice link: %v", err)
|
|
}
|
|
if err := s2.AddLink(bobChannelLink); err != nil {
|
|
t.Fatalf("unable to add bob link: %v", err)
|
|
}
|
|
|
|
if s2.circuits.NumPending() != 1 {
|
|
t.Fatalf("wrong amount of half circuits")
|
|
}
|
|
if s2.circuits.NumOpen() != 0 {
|
|
t.Fatalf("wrong amount of half circuits")
|
|
}
|
|
|
|
// Resend the failed htlc, it should be returned to alice since the
|
|
// switch will detect that it has been half added previously.
|
|
err = s2.forward(ogPacket)
|
|
if err != ErrIncompleteForward {
|
|
t.Fatal("unexpected error when reforwarding a "+
|
|
"failed packet", err)
|
|
}
|
|
|
|
// After detecting an incomplete forward, the fail packet should have
|
|
// been returned to the sender.
|
|
select {
|
|
case <-aliceChannelLink.packets:
|
|
case <-time.After(time.Second):
|
|
t.Fatal("request was not propagated to destination")
|
|
}
|
|
}
|
|
|
|
// TestSwitchForwardCircuitPersistence checks the ability of htlc switch to
|
|
// maintain the proper entries in the circuit map in the face of restarts.
|
|
func TestSwitchForwardCircuitPersistence(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
chanID1, chanID2, aliceChanID, bobChanID := genIDs()
|
|
|
|
alicePeer, err := newMockServer(t, "alice", testStartingHeight, nil, 6)
|
|
if err != nil {
|
|
t.Fatalf("unable to create alice server: %v", err)
|
|
}
|
|
bobPeer, err := newMockServer(t, "bob", testStartingHeight, nil, 6)
|
|
if err != nil {
|
|
t.Fatalf("unable to create bob server: %v", err)
|
|
}
|
|
|
|
tempPath, err := ioutil.TempDir("", "circuitdb")
|
|
if err != nil {
|
|
t.Fatalf("unable to temporary path: %v", err)
|
|
}
|
|
|
|
cdb, err := channeldb.Open(tempPath)
|
|
if err != nil {
|
|
t.Fatalf("unable to open channeldb: %v", err)
|
|
}
|
|
|
|
s, err := initSwitchWithDB(testStartingHeight, cdb)
|
|
if err != nil {
|
|
t.Fatalf("unable to init switch: %v", err)
|
|
}
|
|
if err := s.Start(); err != nil {
|
|
t.Fatalf("unable to start switch: %v", err)
|
|
}
|
|
|
|
// Even though we intend to Stop s later in the test, it is safe to
|
|
// defer this Stop since its execution it is protected by an atomic
|
|
// guard, guaranteeing it executes at most once.
|
|
defer s.Stop()
|
|
|
|
aliceChannelLink := newMockChannelLink(
|
|
s, chanID1, aliceChanID, alicePeer, true,
|
|
)
|
|
bobChannelLink := newMockChannelLink(
|
|
s, chanID2, bobChanID, bobPeer, true,
|
|
)
|
|
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 forwarded from Alice channel link to
|
|
// bob channel link.
|
|
preimage := [sha256.Size]byte{1}
|
|
rhash := fastsha256.Sum256(preimage[:])
|
|
ogPacket := &htlcPacket{
|
|
incomingChanID: aliceChannelLink.ShortChanID(),
|
|
incomingHTLCID: 0,
|
|
outgoingChanID: bobChannelLink.ShortChanID(),
|
|
obfuscator: NewMockObfuscator(),
|
|
htlc: &lnwire.UpdateAddHTLC{
|
|
PaymentHash: rhash,
|
|
Amount: 1,
|
|
},
|
|
}
|
|
|
|
if s.circuits.NumPending() != 0 {
|
|
t.Fatalf("wrong amount of half circuits")
|
|
}
|
|
if s.circuits.NumOpen() != 0 {
|
|
t.Fatalf("wrong amount of circuits")
|
|
}
|
|
|
|
// Handle the request and checks that bob channel link received it.
|
|
if err := s.forward(ogPacket); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
if s.circuits.NumPending() != 1 {
|
|
t.Fatalf("wrong amount of half circuits")
|
|
}
|
|
if s.circuits.NumOpen() != 0 {
|
|
t.Fatalf("wrong amount of circuits")
|
|
}
|
|
|
|
// Retrieve packet from outgoing link and cache until after restart.
|
|
var packet *htlcPacket
|
|
select {
|
|
case packet = <-bobChannelLink.packets:
|
|
case <-time.After(time.Second):
|
|
t.Fatal("request was not propagated to destination")
|
|
}
|
|
|
|
if err := s.Stop(); err != nil {
|
|
t.Fatalf(err.Error())
|
|
}
|
|
|
|
if err := cdb.Close(); err != nil {
|
|
t.Fatalf(err.Error())
|
|
}
|
|
|
|
cdb2, err := channeldb.Open(tempPath)
|
|
if err != nil {
|
|
t.Fatalf("unable to reopen channeldb: %v", err)
|
|
}
|
|
|
|
s2, err := initSwitchWithDB(testStartingHeight, cdb2)
|
|
if err != nil {
|
|
t.Fatalf("unable reinit switch: %v", err)
|
|
}
|
|
if err := s2.Start(); err != nil {
|
|
t.Fatalf("unable to restart switch: %v", err)
|
|
}
|
|
|
|
// Even though we intend to Stop s2 later in the test, it is safe to
|
|
// defer this Stop since its execution it is protected by an atomic
|
|
// guard, guaranteeing it executes at most once.
|
|
defer s2.Stop()
|
|
|
|
aliceChannelLink = newMockChannelLink(
|
|
s2, chanID1, aliceChanID, alicePeer, true,
|
|
)
|
|
bobChannelLink = newMockChannelLink(
|
|
s2, chanID2, bobChanID, bobPeer, true,
|
|
)
|
|
if err := s2.AddLink(aliceChannelLink); err != nil {
|
|
t.Fatalf("unable to add alice link: %v", err)
|
|
}
|
|
if err := s2.AddLink(bobChannelLink); err != nil {
|
|
t.Fatalf("unable to add bob link: %v", err)
|
|
}
|
|
|
|
if s2.circuits.NumPending() != 1 {
|
|
t.Fatalf("wrong amount of half circuits")
|
|
}
|
|
if s2.circuits.NumOpen() != 0 {
|
|
t.Fatalf("wrong amount of half circuits")
|
|
}
|
|
|
|
// Now that the switch has restarted, complete the payment circuit.
|
|
if err := bobChannelLink.completeCircuit(packet); err != nil {
|
|
t.Fatalf("unable to complete payment circuit: %v", err)
|
|
}
|
|
|
|
if s2.circuits.NumPending() != 1 {
|
|
t.Fatalf("wrong amount of half circuits")
|
|
}
|
|
if s2.circuits.NumOpen() != 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.
|
|
ogPacket = &htlcPacket{
|
|
outgoingChanID: bobChannelLink.ShortChanID(),
|
|
outgoingHTLCID: 0,
|
|
amount: 1,
|
|
htlc: &lnwire.UpdateFulfillHTLC{
|
|
PaymentPreimage: preimage,
|
|
},
|
|
}
|
|
|
|
// Handle the request and checks that payment circuit works properly.
|
|
if err := s2.forward(ogPacket); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
select {
|
|
case packet = <-aliceChannelLink.packets:
|
|
if err := aliceChannelLink.completeCircuit(packet); err != nil {
|
|
t.Fatalf("unable to complete circuit with in key=%s: %v",
|
|
packet.inKey(), err)
|
|
}
|
|
case <-time.After(time.Second):
|
|
t.Fatal("request was not propagated to channelPoint")
|
|
}
|
|
|
|
if s2.circuits.NumPending() != 0 {
|
|
t.Fatalf("wrong amount of half circuits, want 1, got %d",
|
|
s2.circuits.NumPending())
|
|
}
|
|
if s2.circuits.NumOpen() != 0 {
|
|
t.Fatal("wrong amount of circuits")
|
|
}
|
|
|
|
if err := s2.Stop(); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
if err := cdb2.Close(); err != nil {
|
|
t.Fatalf(err.Error())
|
|
}
|
|
|
|
cdb3, err := channeldb.Open(tempPath)
|
|
if err != nil {
|
|
t.Fatalf("unable to reopen channeldb: %v", err)
|
|
}
|
|
|
|
s3, err := initSwitchWithDB(testStartingHeight, cdb3)
|
|
if err != nil {
|
|
t.Fatalf("unable reinit switch: %v", err)
|
|
}
|
|
if err := s3.Start(); err != nil {
|
|
t.Fatalf("unable to restart switch: %v", err)
|
|
}
|
|
defer s3.Stop()
|
|
|
|
aliceChannelLink = newMockChannelLink(
|
|
s3, chanID1, aliceChanID, alicePeer, true,
|
|
)
|
|
bobChannelLink = newMockChannelLink(
|
|
s3, chanID2, bobChanID, bobPeer, true,
|
|
)
|
|
if err := s3.AddLink(aliceChannelLink); err != nil {
|
|
t.Fatalf("unable to add alice link: %v", err)
|
|
}
|
|
if err := s3.AddLink(bobChannelLink); err != nil {
|
|
t.Fatalf("unable to add bob link: %v", err)
|
|
}
|
|
|
|
if s3.circuits.NumPending() != 0 {
|
|
t.Fatalf("wrong amount of half circuits")
|
|
}
|
|
if s3.circuits.NumOpen() != 0 {
|
|
t.Fatalf("wrong amount of circuits")
|
|
}
|
|
}
|
|
|
|
// TestSkipIneligibleLinksMultiHopForward tests that if a multi-hop HTLC comes
|
|
// along, then we won't attempt to froward it down al ink that isn't yet able
|
|
// to forward any HTLC's.
|
|
func TestSkipIneligibleLinksMultiHopForward(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
var packet *htlcPacket
|
|
|
|
alicePeer, err := newMockServer(t, "alice", testStartingHeight, nil, 6)
|
|
if err != nil {
|
|
t.Fatalf("unable to create alice server: %v", err)
|
|
}
|
|
bobPeer, err := newMockServer(t, "bob", testStartingHeight, nil, 6)
|
|
if err != nil {
|
|
t.Fatalf("unable to create bob server: %v", err)
|
|
}
|
|
|
|
s, err := initSwitchWithDB(testStartingHeight, nil)
|
|
if err != nil {
|
|
t.Fatalf("unable to init switch: %v", err)
|
|
}
|
|
if err := s.Start(); err != nil {
|
|
t.Fatalf("unable to start switch: %v", err)
|
|
}
|
|
defer s.Stop()
|
|
|
|
chanID1, chanID2, aliceChanID, bobChanID := genIDs()
|
|
|
|
aliceChannelLink := newMockChannelLink(
|
|
s, chanID1, aliceChanID, alicePeer, true,
|
|
)
|
|
|
|
// We'll create a link for Bob, but mark the link as unable to forward
|
|
// any new outgoing HTLC's.
|
|
bobChannelLink := newMockChannelLink(
|
|
s, chanID2, bobChanID, bobPeer, false,
|
|
)
|
|
|
|
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 a new packet that's destined for Bob as an incoming HTLC from
|
|
// Alice.
|
|
preimage := [sha256.Size]byte{1}
|
|
rhash := fastsha256.Sum256(preimage[:])
|
|
packet = &htlcPacket{
|
|
incomingChanID: aliceChannelLink.ShortChanID(),
|
|
incomingHTLCID: 0,
|
|
outgoingChanID: bobChannelLink.ShortChanID(),
|
|
htlc: &lnwire.UpdateAddHTLC{
|
|
PaymentHash: rhash,
|
|
Amount: 1,
|
|
},
|
|
obfuscator: NewMockObfuscator(),
|
|
}
|
|
|
|
// The request to forward should fail as
|
|
err = s.forward(packet)
|
|
if err == nil {
|
|
t.Fatalf("forwarding should have failed due to inactive link")
|
|
}
|
|
|
|
if s.circuits.NumOpen() != 0 {
|
|
t.Fatal("wrong amount of circuits")
|
|
}
|
|
}
|
|
|
|
// TestSkipIneligibleLinksLocalForward ensures that the switch will not attempt
|
|
// to forward any HTLC's down a link that isn't yet eligible for forwarding.
|
|
func TestSkipIneligibleLinksLocalForward(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
// We'll create a single link for this test, marking it as being unable
|
|
// to forward form the get go.
|
|
alicePeer, err := newMockServer(t, "alice", testStartingHeight, nil, 6)
|
|
if err != nil {
|
|
t.Fatalf("unable to create alice server: %v", err)
|
|
}
|
|
|
|
s, err := initSwitchWithDB(testStartingHeight, nil)
|
|
if err != nil {
|
|
t.Fatalf("unable to init switch: %v", err)
|
|
}
|
|
if err := s.Start(); err != nil {
|
|
t.Fatalf("unable to start switch: %v", err)
|
|
}
|
|
defer s.Stop()
|
|
|
|
chanID1, _, aliceChanID, _ := genIDs()
|
|
|
|
aliceChannelLink := newMockChannelLink(
|
|
s, chanID1, aliceChanID, alicePeer, false,
|
|
)
|
|
if err := s.AddLink(aliceChannelLink); err != nil {
|
|
t.Fatalf("unable to add alice link: %v", err)
|
|
}
|
|
|
|
preimage, err := genPreimage()
|
|
if err != nil {
|
|
t.Fatalf("unable to generate preimage: %v", err)
|
|
}
|
|
rhash := fastsha256.Sum256(preimage[:])
|
|
addMsg := &lnwire.UpdateAddHTLC{
|
|
PaymentHash: rhash,
|
|
Amount: 1,
|
|
}
|
|
|
|
// We'll attempt to send out a new HTLC that has Alice as the first
|
|
// outgoing link. This should fail as Alice isn't yet able to forward
|
|
// any active HTLC's.
|
|
alicePub := aliceChannelLink.Peer().PubKey()
|
|
_, err = s.SendHTLC(alicePub, addMsg, nil)
|
|
if err == nil {
|
|
t.Fatalf("local forward should fail due to inactive link")
|
|
}
|
|
|
|
if s.circuits.NumOpen() != 0 {
|
|
t.Fatal("wrong amount of circuits")
|
|
}
|
|
}
|
|
|
|
// TestSwitchCancel checks that if htlc was rejected we remove unused
|
|
// circuits.
|
|
func TestSwitchCancel(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
alicePeer, err := newMockServer(t, "alice", testStartingHeight, nil, 6)
|
|
if err != nil {
|
|
t.Fatalf("unable to create alice server: %v", err)
|
|
}
|
|
bobPeer, err := newMockServer(t, "bob", testStartingHeight, nil, 6)
|
|
if err != nil {
|
|
t.Fatalf("unable to create bob server: %v", err)
|
|
}
|
|
|
|
s, err := initSwitchWithDB(testStartingHeight, nil)
|
|
if err != nil {
|
|
t.Fatalf("unable to init switch: %v", err)
|
|
}
|
|
if err := s.Start(); err != nil {
|
|
t.Fatalf("unable to start switch: %v", err)
|
|
}
|
|
defer s.Stop()
|
|
|
|
chanID1, chanID2, aliceChanID, bobChanID := genIDs()
|
|
|
|
aliceChannelLink := newMockChannelLink(
|
|
s, chanID1, aliceChanID, alicePeer, true,
|
|
)
|
|
bobChannelLink := newMockChannelLink(
|
|
s, chanID2, bobChanID, bobPeer, true,
|
|
)
|
|
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, err := genPreimage()
|
|
if err != nil {
|
|
t.Fatalf("unable to generate preimage: %v", err)
|
|
}
|
|
rhash := fastsha256.Sum256(preimage[:])
|
|
request := &htlcPacket{
|
|
incomingChanID: aliceChannelLink.ShortChanID(),
|
|
incomingHTLCID: 0,
|
|
outgoingChanID: bobChannelLink.ShortChanID(),
|
|
obfuscator: NewMockObfuscator(),
|
|
htlc: &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 packet := <-bobChannelLink.packets:
|
|
if err := bobChannelLink.completeCircuit(packet); err != nil {
|
|
t.Fatalf("unable to complete payment circuit: %v", err)
|
|
}
|
|
|
|
case <-time.After(time.Second):
|
|
t.Fatal("request was not propagated to destination")
|
|
}
|
|
|
|
if s.circuits.NumPending() != 1 {
|
|
t.Fatalf("wrong amount of half circuits")
|
|
}
|
|
if s.circuits.NumOpen() != 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 = &htlcPacket{
|
|
outgoingChanID: bobChannelLink.ShortChanID(),
|
|
outgoingHTLCID: 0,
|
|
amount: 1,
|
|
htlc: &lnwire.UpdateFailHTLC{},
|
|
}
|
|
|
|
// Handle the request and checks that payment circuit works properly.
|
|
if err := s.forward(request); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
select {
|
|
case pkt := <-aliceChannelLink.packets:
|
|
if err := aliceChannelLink.completeCircuit(pkt); err != nil {
|
|
t.Fatalf("unable to remove circuit: %v", err)
|
|
}
|
|
|
|
case <-time.After(time.Second):
|
|
t.Fatal("request was not propagated to channelPoint")
|
|
}
|
|
|
|
if s.circuits.NumPending() != 0 {
|
|
t.Fatal("wrong amount of circuits")
|
|
}
|
|
if s.circuits.NumOpen() != 0 {
|
|
t.Fatal("wrong amount of circuits")
|
|
}
|
|
}
|
|
|
|
// TestSwitchAddSamePayment tests that we send the payment with the same
|
|
// payment hash.
|
|
func TestSwitchAddSamePayment(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
chanID1, chanID2, aliceChanID, bobChanID := genIDs()
|
|
|
|
alicePeer, err := newMockServer(t, "alice", testStartingHeight, nil, 6)
|
|
if err != nil {
|
|
t.Fatalf("unable to create alice server: %v", err)
|
|
}
|
|
bobPeer, err := newMockServer(t, "bob", testStartingHeight, nil, 6)
|
|
if err != nil {
|
|
t.Fatalf("unable to create bob server: %v", err)
|
|
}
|
|
|
|
s, err := initSwitchWithDB(testStartingHeight, nil)
|
|
if err != nil {
|
|
t.Fatalf("unable to init switch: %v", err)
|
|
}
|
|
if err := s.Start(); err != nil {
|
|
t.Fatalf("unable to start switch: %v", err)
|
|
}
|
|
defer s.Stop()
|
|
|
|
aliceChannelLink := newMockChannelLink(
|
|
s, chanID1, aliceChanID, alicePeer, true,
|
|
)
|
|
bobChannelLink := newMockChannelLink(
|
|
s, chanID2, bobChanID, bobPeer, true,
|
|
)
|
|
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, err := genPreimage()
|
|
if err != nil {
|
|
t.Fatalf("unable to generate preimage: %v", err)
|
|
}
|
|
rhash := fastsha256.Sum256(preimage[:])
|
|
request := &htlcPacket{
|
|
incomingChanID: aliceChannelLink.ShortChanID(),
|
|
incomingHTLCID: 0,
|
|
outgoingChanID: bobChannelLink.ShortChanID(),
|
|
obfuscator: NewMockObfuscator(),
|
|
htlc: &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 packet := <-bobChannelLink.packets:
|
|
if err := bobChannelLink.completeCircuit(packet); err != nil {
|
|
t.Fatalf("unable to complete payment circuit: %v", err)
|
|
}
|
|
|
|
case <-time.After(time.Second):
|
|
t.Fatal("request was not propagated to destination")
|
|
}
|
|
|
|
if s.circuits.NumOpen() != 1 {
|
|
t.Fatal("wrong amount of circuits")
|
|
}
|
|
|
|
request = &htlcPacket{
|
|
incomingChanID: aliceChannelLink.ShortChanID(),
|
|
incomingHTLCID: 1,
|
|
outgoingChanID: bobChannelLink.ShortChanID(),
|
|
obfuscator: NewMockObfuscator(),
|
|
htlc: &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 packet := <-bobChannelLink.packets:
|
|
if err := bobChannelLink.completeCircuit(packet); err != nil {
|
|
t.Fatalf("unable to complete payment circuit: %v", err)
|
|
}
|
|
|
|
case <-time.After(time.Second):
|
|
t.Fatal("request was not propagated to destination")
|
|
}
|
|
|
|
if s.circuits.NumOpen() != 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 = &htlcPacket{
|
|
outgoingChanID: bobChannelLink.ShortChanID(),
|
|
outgoingHTLCID: 0,
|
|
amount: 1,
|
|
htlc: &lnwire.UpdateFailHTLC{},
|
|
}
|
|
|
|
// Handle the request and checks that payment circuit works properly.
|
|
if err := s.forward(request); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
select {
|
|
case pkt := <-aliceChannelLink.packets:
|
|
if err := aliceChannelLink.completeCircuit(pkt); err != nil {
|
|
t.Fatalf("unable to remove circuit: %v", err)
|
|
}
|
|
|
|
case <-time.After(time.Second):
|
|
t.Fatal("request was not propagated to channelPoint")
|
|
}
|
|
|
|
if s.circuits.NumOpen() != 1 {
|
|
t.Fatal("wrong amount of circuits")
|
|
}
|
|
|
|
request = &htlcPacket{
|
|
outgoingChanID: bobChannelLink.ShortChanID(),
|
|
outgoingHTLCID: 1,
|
|
amount: 1,
|
|
htlc: &lnwire.UpdateFailHTLC{},
|
|
}
|
|
|
|
// Handle the request and checks that payment circuit works properly.
|
|
if err := s.forward(request); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
select {
|
|
case pkt := <-aliceChannelLink.packets:
|
|
if err := aliceChannelLink.completeCircuit(pkt); err != nil {
|
|
t.Fatalf("unable to remove circuit: %v", err)
|
|
}
|
|
|
|
case <-time.After(time.Second):
|
|
t.Fatal("request was not propagated to channelPoint")
|
|
}
|
|
|
|
if s.circuits.NumOpen() != 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) {
|
|
t.Parallel()
|
|
|
|
alicePeer, err := newMockServer(t, "alice", testStartingHeight, nil, 6)
|
|
if err != nil {
|
|
t.Fatalf("unable to create alice server: %v", err)
|
|
}
|
|
|
|
s, err := initSwitchWithDB(testStartingHeight, nil)
|
|
if err != nil {
|
|
t.Fatalf("unable to init switch: %v", err)
|
|
}
|
|
if err := s.Start(); err != nil {
|
|
t.Fatalf("unable to start switch: %v", err)
|
|
}
|
|
defer s.Stop()
|
|
|
|
chanID1, _, aliceChanID, _ := genIDs()
|
|
|
|
aliceChannelLink := newMockChannelLink(
|
|
s, chanID1, aliceChanID, alicePeer, true,
|
|
)
|
|
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, err := genPreimage()
|
|
if err != nil {
|
|
t.Fatalf("unable to generate preimage: %v", err)
|
|
}
|
|
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,
|
|
newMockDeobfuscator())
|
|
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,
|
|
newMockDeobfuscator())
|
|
errChan <- err
|
|
}()
|
|
|
|
select {
|
|
case packet := <-aliceChannelLink.packets:
|
|
if err := aliceChannelLink.completeCircuit(packet); err != nil {
|
|
t.Fatalf("unable to complete payment circuit: %v", err)
|
|
}
|
|
|
|
case err := <-errChan:
|
|
t.Fatalf("unable to send payment: %v", err)
|
|
case <-time.After(time.Second):
|
|
t.Fatal("request was not propagated to destination")
|
|
}
|
|
|
|
select {
|
|
case packet := <-aliceChannelLink.packets:
|
|
if err := aliceChannelLink.completeCircuit(packet); err != nil {
|
|
t.Fatalf("unable to complete payment circuit: %v", err)
|
|
}
|
|
|
|
case err := <-errChan:
|
|
t.Fatalf("unable to send payment: %v", err)
|
|
case <-time.After(time.Second):
|
|
t.Fatal("request was not propagated to destination")
|
|
}
|
|
|
|
if s.numPendingPayments() != 2 {
|
|
t.Fatal("wrong amount of pending payments")
|
|
}
|
|
|
|
if s.circuits.NumOpen() != 2 {
|
|
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 forwarded back to alice channel link.
|
|
obfuscator := NewMockObfuscator()
|
|
failure := lnwire.FailIncorrectPaymentAmount{}
|
|
reason, err := obfuscator.EncryptFirstHop(failure)
|
|
if err != nil {
|
|
t.Fatalf("unable obfuscate failure: %v", err)
|
|
}
|
|
|
|
packet := &htlcPacket{
|
|
outgoingChanID: aliceChannelLink.ShortChanID(),
|
|
outgoingHTLCID: 0,
|
|
amount: 1,
|
|
htlc: &lnwire.UpdateFailHTLC{
|
|
Reason: reason,
|
|
},
|
|
}
|
|
|
|
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.CodeIncorrectPaymentAmount).Error() {
|
|
t.Fatal("err wasn't received")
|
|
}
|
|
case <-time.After(time.Second):
|
|
t.Fatal("err wasn't received")
|
|
}
|
|
|
|
packet = &htlcPacket{
|
|
outgoingChanID: aliceChannelLink.ShortChanID(),
|
|
outgoingHTLCID: 1,
|
|
htlc: &lnwire.UpdateFailHTLC{
|
|
Reason: reason,
|
|
},
|
|
}
|
|
|
|
// 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.CodeIncorrectPaymentAmount).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")
|
|
}
|
|
}
|
|
|
|
// TestLocalPaymentNoForwardingEvents tests that if we send a series of locally
|
|
// initiated payments, then they aren't reflected in the forwarding log.
|
|
func TestLocalPaymentNoForwardingEvents(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
// First, we'll create our traditional three hop network. We'll only be
|
|
// interacting with and asserting the state of the first end point for
|
|
// this test.
|
|
channels, cleanUp, _, err := createClusterChannels(
|
|
btcutil.SatoshiPerBitcoin*3,
|
|
btcutil.SatoshiPerBitcoin*5)
|
|
if err != nil {
|
|
t.Fatalf("unable to create channel: %v", err)
|
|
}
|
|
defer cleanUp()
|
|
|
|
n := newThreeHopNetwork(t, channels.aliceToBob, channels.bobToAlice,
|
|
channels.bobToCarol, channels.carolToBob, testStartingHeight)
|
|
if err := n.start(); err != nil {
|
|
t.Fatalf("unable to start three hop network: %v", err)
|
|
}
|
|
|
|
// We'll now craft and send a payment from Alice to Bob.
|
|
amount := lnwire.NewMSatFromSatoshis(btcutil.SatoshiPerBitcoin)
|
|
htlcAmt, totalTimelock, hops := generateHops(
|
|
amount, testStartingHeight, n.firstBobChannelLink,
|
|
)
|
|
|
|
// With the payment crafted, we'll send it from Alice to Bob. We'll
|
|
// wait for Alice to receive the preimage for the payment before
|
|
// proceeding.
|
|
receiver := n.bobServer
|
|
_, err = n.makePayment(
|
|
n.aliceServer, receiver, n.bobServer.PubKey(), hops, amount,
|
|
htlcAmt, totalTimelock,
|
|
).Wait(30 * time.Second)
|
|
if err != nil {
|
|
t.Fatalf("unable to make the payment: %v", err)
|
|
}
|
|
|
|
// At this point, we'll forcibly stop the three hop network. Doing
|
|
// this will cause any pending forwarding events to be flushed by the
|
|
// various switches in the network.
|
|
n.stop()
|
|
|
|
// With all the switches stopped, we'll fetch Alice's mock forwarding
|
|
// event log.
|
|
log, ok := n.aliceServer.htlcSwitch.cfg.FwdingLog.(*mockForwardingLog)
|
|
if !ok {
|
|
t.Fatalf("mockForwardingLog assertion failed")
|
|
}
|
|
log.Lock()
|
|
defer log.Unlock()
|
|
|
|
// If we examine the memory of the forwarding log, then it should be
|
|
// blank.
|
|
if len(log.events) != 0 {
|
|
t.Fatalf("log should have no events, instead has: %v",
|
|
spew.Sdump(log.events))
|
|
}
|
|
}
|
|
|
|
// TestMultiHopPaymentForwardingEvents tests that if we send a series of
|
|
// multi-hop payments via Alice->Bob->Carol. Then Bob properly logs forwarding
|
|
// events, while Alice and Carol don't.
|
|
func TestMultiHopPaymentForwardingEvents(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
// First, we'll create our traditional three hop network.
|
|
channels, cleanUp, _, err := createClusterChannels(
|
|
btcutil.SatoshiPerBitcoin*3,
|
|
btcutil.SatoshiPerBitcoin*5)
|
|
if err != nil {
|
|
t.Fatalf("unable to create channel: %v", err)
|
|
}
|
|
defer cleanUp()
|
|
|
|
n := newThreeHopNetwork(t, channels.aliceToBob, channels.bobToAlice,
|
|
channels.bobToCarol, channels.carolToBob, testStartingHeight)
|
|
if err := n.start(); err != nil {
|
|
t.Fatalf("unable to start three hop network: %v", err)
|
|
}
|
|
|
|
// We'll make now 10 payments, of 100k satoshis each from Alice to
|
|
// Carol via Bob.
|
|
const numPayments = 10
|
|
finalAmt := lnwire.NewMSatFromSatoshis(100000)
|
|
htlcAmt, totalTimelock, hops := generateHops(
|
|
finalAmt, testStartingHeight, n.firstBobChannelLink,
|
|
n.carolChannelLink,
|
|
)
|
|
for i := 0; i < numPayments; i++ {
|
|
_, err := n.makePayment(
|
|
n.aliceServer, n.carolServer, n.bobServer.PubKey(),
|
|
hops, finalAmt, htlcAmt, totalTimelock,
|
|
).Wait(30 * time.Second)
|
|
if err != nil {
|
|
t.Fatalf("unable to send payment: %v", err)
|
|
}
|
|
}
|
|
|
|
// With all 10 payments sent. We'll now manually stop each of the
|
|
// switches so we can examine their end state.
|
|
n.stop()
|
|
|
|
// Alice and Carol shouldn't have any recorded forwarding events, as
|
|
// they were the source and the sink for these payment flows.
|
|
aliceLog, ok := n.aliceServer.htlcSwitch.cfg.FwdingLog.(*mockForwardingLog)
|
|
if !ok {
|
|
t.Fatalf("mockForwardingLog assertion failed")
|
|
}
|
|
aliceLog.Lock()
|
|
defer aliceLog.Unlock()
|
|
if len(aliceLog.events) != 0 {
|
|
t.Fatalf("log should have no events, instead has: %v",
|
|
spew.Sdump(aliceLog.events))
|
|
}
|
|
|
|
carolLog, ok := n.carolServer.htlcSwitch.cfg.FwdingLog.(*mockForwardingLog)
|
|
if !ok {
|
|
t.Fatalf("mockForwardingLog assertion failed")
|
|
}
|
|
carolLog.Lock()
|
|
defer carolLog.Unlock()
|
|
if len(carolLog.events) != 0 {
|
|
t.Fatalf("log should have no events, instead has: %v",
|
|
spew.Sdump(carolLog.events))
|
|
}
|
|
|
|
// Bob on the other hand, should have 10 events.
|
|
bobLog, ok := n.bobServer.htlcSwitch.cfg.FwdingLog.(*mockForwardingLog)
|
|
if !ok {
|
|
t.Fatalf("mockForwardingLog assertion failed")
|
|
}
|
|
bobLog.Lock()
|
|
defer bobLog.Unlock()
|
|
if len(bobLog.events) != 10 {
|
|
t.Fatalf("log should have 10 events, instead has: %v",
|
|
spew.Sdump(bobLog.events))
|
|
}
|
|
|
|
// Each of the 10 events should have had all fields set properly.
|
|
for _, event := range bobLog.events {
|
|
// The incoming and outgoing channels should properly be set for
|
|
// the event.
|
|
if event.IncomingChanID != n.aliceChannelLink.ShortChanID() {
|
|
t.Fatalf("chan id mismatch: expected %v, got %v",
|
|
event.IncomingChanID,
|
|
n.aliceChannelLink.ShortChanID())
|
|
}
|
|
if event.OutgoingChanID != n.carolChannelLink.ShortChanID() {
|
|
t.Fatalf("chan id mismatch: expected %v, got %v",
|
|
event.OutgoingChanID,
|
|
n.carolChannelLink.ShortChanID())
|
|
}
|
|
|
|
// Additionally, the incoming and outgoing amounts should also
|
|
// be properly set.
|
|
if event.AmtIn != htlcAmt {
|
|
t.Fatalf("incoming amt mismatch: expected %v, got %v",
|
|
event.AmtIn, htlcAmt)
|
|
}
|
|
if event.AmtOut != finalAmt {
|
|
t.Fatalf("outgoing amt mismatch: expected %v, got %v",
|
|
event.AmtOut, finalAmt)
|
|
}
|
|
}
|
|
}
|