lnd.xprv/lntest/itest/lnd_multi-hop_test.go

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package itest
import (
"context"
"fmt"
"testing"
"github.com/btcsuite/btcd/chaincfg/chainhash"
"github.com/btcsuite/btcd/wire"
"github.com/btcsuite/btcutil"
"github.com/lightningnetwork/lnd/lnrpc"
"github.com/lightningnetwork/lnd/lnrpc/invoicesrpc"
"github.com/lightningnetwork/lnd/lntest"
"github.com/lightningnetwork/lnd/lntypes"
)
func testMultiHopHtlcClaims(net *lntest.NetworkHarness, t *harnessTest) {
type testCase struct {
name string
test func(net *lntest.NetworkHarness, t *harnessTest, alice,
bob *lntest.HarnessNode, c commitType)
}
subTests := []testCase{
{
// bob: outgoing our commit timeout
// carol: incoming their commit watch and see timeout
name: "local force close immediate expiry",
test: testMultiHopHtlcLocalTimeout,
},
{
// bob: outgoing watch and see, they sweep on chain
// carol: incoming our commit, know preimage
name: "receiver chain claim",
test: testMultiHopReceiverChainClaim,
},
{
// bob: outgoing our commit watch and see timeout
// carol: incoming their commit watch and see timeout
name: "local force close on-chain htlc timeout",
test: testMultiHopLocalForceCloseOnChainHtlcTimeout,
},
{
// bob: outgoing their commit watch and see timeout
// carol: incoming our commit watch and see timeout
name: "remote force close on-chain htlc timeout",
test: testMultiHopRemoteForceCloseOnChainHtlcTimeout,
},
{
// bob: outgoing our commit watch and see, they sweep on chain
// bob: incoming our commit watch and learn preimage
// carol: incoming their commit know preimage
name: "local chain claim",
test: testMultiHopHtlcLocalChainClaim,
},
{
// bob: outgoing their commit watch and see, they sweep on chain
// bob: incoming their commit watch and learn preimage
// carol: incoming our commit know preimage
name: "remote chain claim",
test: testMultiHopHtlcRemoteChainClaim,
},
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{
// bob: outgoing and incoming, sweep all on chain
name: "local htlc aggregation",
test: testMultiHopHtlcAggregation,
},
}
commitTypes := []commitType{
commitTypeLegacy,
commitTypeAnchors,
}
for _, commitType := range commitTypes {
testName := fmt.Sprintf("committype=%v", commitType.String())
commitType := commitType
success := t.t.Run(testName, func(t *testing.T) {
ht := newHarnessTest(t, net)
args := commitType.Args()
alice, err := net.NewNode("Alice", args)
if err != nil {
t.Fatalf("unable to create new node: %v", err)
}
defer shutdownAndAssert(net, ht, alice)
bob, err := net.NewNode("Bob", args)
if err != nil {
t.Fatalf("unable to create new node: %v", err)
}
defer shutdownAndAssert(net, ht, bob)
ctxb := context.Background()
ctxt, _ := context.WithTimeout(ctxb, defaultTimeout)
if err := net.ConnectNodes(ctxt, alice, bob); err != nil {
t.Fatalf("unable to connect alice to bob: %v", err)
}
for _, subTest := range subTests {
subTest := subTest
success := ht.t.Run(subTest.name, func(t *testing.T) {
ht := newHarnessTest(t, net)
// Start each test with the default
// static fee estimate.
net.SetFeeEstimate(12500)
subTest.test(net, ht, alice, bob, commitType)
})
if !success {
return
}
}
})
if !success {
return
}
}
}
// waitForInvoiceAccepted waits until the specified invoice moved to the
// accepted state by the node.
func waitForInvoiceAccepted(t *harnessTest, node *lntest.HarnessNode,
payHash lntypes.Hash) {
ctx, cancel := context.WithTimeout(context.Background(), defaultTimeout)
defer cancel()
invoiceUpdates, err := node.SubscribeSingleInvoice(ctx,
&invoicesrpc.SubscribeSingleInvoiceRequest{
RHash: payHash[:],
},
)
if err != nil {
t.Fatalf("subscribe single invoice: %v", err)
}
for {
update, err := invoiceUpdates.Recv()
if err != nil {
t.Fatalf("invoice update err: %v", err)
}
if update.State == lnrpc.Invoice_ACCEPTED {
break
}
}
}
// checkPaymentStatus asserts that the given node list a payment with the given
// preimage has the expected status.
func checkPaymentStatus(ctxt context.Context, node *lntest.HarnessNode,
preimage lntypes.Preimage, status lnrpc.Payment_PaymentStatus) error {
req := &lnrpc.ListPaymentsRequest{
IncludeIncomplete: true,
}
paymentsResp, err := node.ListPayments(ctxt, req)
if err != nil {
return fmt.Errorf("error when obtaining Alice payments: %v",
err)
}
payHash := preimage.Hash()
var found bool
for _, p := range paymentsResp.Payments {
if p.PaymentHash != payHash.String() {
continue
}
found = true
if p.Status != status {
return fmt.Errorf("expected payment status "+
"%v, got %v", status, p.Status)
}
switch status {
// If this expected status is SUCCEEDED, we expect the final preimage.
case lnrpc.Payment_SUCCEEDED:
if p.PaymentPreimage != preimage.String() {
return fmt.Errorf("preimage doesn't match: %v vs %v",
p.PaymentPreimage, preimage.String())
}
// Otherwise we expect an all-zero preimage.
default:
if p.PaymentPreimage != (lntypes.Preimage{}).String() {
return fmt.Errorf("expected zero preimage, got %v",
p.PaymentPreimage)
}
}
}
if !found {
return fmt.Errorf("payment with payment hash %v not found "+
"in response", payHash)
}
return nil
}
func createThreeHopNetwork(t *harnessTest, net *lntest.NetworkHarness,
alice, bob *lntest.HarnessNode, carolHodl bool, c commitType) (
*lnrpc.ChannelPoint, *lnrpc.ChannelPoint, *lntest.HarnessNode) {
ctxb := context.Background()
ctxt, _ := context.WithTimeout(ctxb, defaultTimeout)
err := net.EnsureConnected(ctxt, alice, bob)
if err != nil {
t.Fatalf("unable to connect peers: %v", err)
}
// Make sure there are enough utxos for anchoring.
for i := 0; i < 2; i++ {
ctxt, _ = context.WithTimeout(context.Background(), defaultTimeout)
err = net.SendCoins(ctxt, btcutil.SatoshiPerBitcoin, alice)
if err != nil {
t.Fatalf("unable to send coins to Alice: %v", err)
}
ctxt, _ = context.WithTimeout(context.Background(), defaultTimeout)
err = net.SendCoins(ctxt, btcutil.SatoshiPerBitcoin, bob)
if err != nil {
t.Fatalf("unable to send coins to Bob: %v", err)
}
}
// We'll start the test by creating a channel between Alice and Bob,
// which will act as the first leg for out multi-hop HTLC.
const chanAmt = 1000000
ctxt, _ = context.WithTimeout(ctxb, channelOpenTimeout)
aliceChanPoint := openChannelAndAssert(
ctxt, t, net, alice, bob,
lntest.OpenChannelParams{
Amt: chanAmt,
},
)
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
err = alice.WaitForNetworkChannelOpen(ctxt, aliceChanPoint)
if err != nil {
t.Fatalf("alice didn't report channel: %v", err)
}
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
err = bob.WaitForNetworkChannelOpen(ctxt, aliceChanPoint)
if err != nil {
t.Fatalf("bob didn't report channel: %v", err)
}
// Next, we'll create a new node "carol" and have Bob connect to her. If
// the carolHodl flag is set, we'll make carol always hold onto the
// HTLC, this way it'll force Bob to go to chain to resolve the HTLC.
carolFlags := c.Args()
if carolHodl {
carolFlags = append(carolFlags, "--hodl.exit-settle")
}
carol, err := net.NewNode("Carol", carolFlags)
if err != nil {
t.Fatalf("unable to create new node: %v", err)
}
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
if err := net.ConnectNodes(ctxt, bob, carol); err != nil {
t.Fatalf("unable to connect bob to carol: %v", err)
}
// Make sure Carol has enough utxos for anchoring. Because the anchor by
// itself often doesn't meet the dust limit, a utxo from the wallet
// needs to be attached as an additional input. This can still lead to a
// positively-yielding transaction.
for i := 0; i < 2; i++ {
ctxt, _ = context.WithTimeout(context.Background(), defaultTimeout)
err = net.SendCoins(ctxt, btcutil.SatoshiPerBitcoin, carol)
if err != nil {
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t.Fatalf("unable to send coins to Carol: %v", err)
}
}
// We'll then create a channel from Bob to Carol. After this channel is
// open, our topology looks like: A -> B -> C.
ctxt, _ = context.WithTimeout(ctxb, channelOpenTimeout)
bobChanPoint := openChannelAndAssert(
ctxt, t, net, bob, carol,
lntest.OpenChannelParams{
Amt: chanAmt,
},
)
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
err = bob.WaitForNetworkChannelOpen(ctxt, bobChanPoint)
if err != nil {
t.Fatalf("alice didn't report channel: %v", err)
}
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
err = carol.WaitForNetworkChannelOpen(ctxt, bobChanPoint)
if err != nil {
t.Fatalf("bob didn't report channel: %v", err)
}
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
err = alice.WaitForNetworkChannelOpen(ctxt, bobChanPoint)
if err != nil {
t.Fatalf("bob didn't report channel: %v", err)
}
return aliceChanPoint, bobChanPoint, carol
}
// assertAllTxesSpendFrom asserts that all txes in the list spend from the given
// tx.
func assertAllTxesSpendFrom(t *harnessTest, txes []*wire.MsgTx,
prevTxid chainhash.Hash) {
for _, tx := range txes {
if tx.TxIn[0].PreviousOutPoint.Hash != prevTxid {
t.Fatalf("tx %v did not spend from %v",
tx.TxHash(), prevTxid)
}
}
}