test: assert raw output signing requests

client_test.go

@@ -265,6 +265,9 @@ func testSuccess(ctx *testContext, amt btcutil.Amount, hash lntypes.Hash,
 	// Publish tick.
 	ctx.expiryChan <- testTime
 
+	// Expect a signing request.
+	<-ctx.Lnd.SignOutputRawChannel
+
 	if !preimageRevealed {
 		ctx.assertStatus(loopdb.StatePreimageRevealed)
 		ctx.assertStorePreimageReveal()

loopin_test.go

@@ -175,6 +175,9 @@ func TestLoopInTimeout(t *testing.T) {
 	// Let htlc expire.
 	ctx.blockEpochChan <- swap.LoopInContract.CltvExpiry
 
+	// Expect a signing request.
+	<-ctx.lnd.SignOutputRawChannel
+
 	// Expect timeout tx to be published.
 	timeoutTx := <-ctx.lnd.TxPublishChannel
 

loopout_test.go

@@ -192,6 +192,9 @@ func TestCustomSweepConfTarget(t *testing.T) {
 
 	expiryChan <- time.Now()
 
+	// Expect a signing request for the HTLC success transaction.
+	<-ctx.Lnd.SignOutputRawChannel
+
 	cfg.store.(*storeMock).assertLoopOutState(loopdb.StatePreimageRevealed)
 	status := <-statusChan
 	if status.State != loopdb.StatePreimageRevealed {
@@ -247,6 +250,9 @@ func TestCustomSweepConfTarget(t *testing.T) {
 	blockEpochChan <- int32(defaultConfTargetHeight)
 	expiryChan <- time.Now()
 
+	// Expect another signing request.
+	<-ctx.Lnd.SignOutputRawChannel
+
 	// We should expect to see another sweep using the higher fee since the
 	// spend hasn't been confirmed yet.
 	sweepTx := assertSweepTx(DefaultSweepConfTarget)

test/lnd_services_mock.go

@@ -9,6 +9,7 @@ import (
 	"github.com/btcsuite/btcd/wire"
 	"github.com/lightninglabs/loop/lndclient"
 	"github.com/lightningnetwork/lnd/chainntnfs"
+	"github.com/lightningnetwork/lnd/input"
 	"github.com/lightningnetwork/lnd/lntypes"
 	"github.com/lightningnetwork/lnd/lnwallet/chainfee"
 	"github.com/lightningnetwork/lnd/zpay32"
@@ -57,6 +58,8 @@ func NewMockLnd() *LndMockServices {
 		RouterSendPaymentChannel: make(chan RouterPaymentChannelMessage),
 		TrackPaymentChannel:      make(chan TrackPaymentMessage),
 
+		SignOutputRawChannel: make(chan SignOutputRawRequest),
+
 		FailInvoiceChannel: make(chan lntypes.Hash, 2),
 		epochChannel:       make(chan int32),
 		Height:             testStartingHeight,
@@ -109,6 +112,12 @@ type SingleInvoiceSubscription struct {
 	Err    chan error
 }
 
+// SignOutputRawRequest contains input data for a tx signing request.
+type SignOutputRawRequest struct {
+	Tx              *wire.MsgTx
+	SignDescriptors []*input.SignDescriptor
+}
+
 // LndMockServices provides a full set of mocked lnd services.
 type LndMockServices struct {
 	lndclient.LndServices
@@ -130,6 +139,8 @@ type LndMockServices struct {
 	RouterSendPaymentChannel chan RouterPaymentChannelMessage
 	TrackPaymentChannel      chan TrackPaymentMessage
 
+	SignOutputRawChannel chan SignOutputRawRequest
+
 	Height       int32
 	NodePubkey   string
 	Signature    []byte

test/signer_mock.go

@@ -16,6 +16,11 @@ type mockSigner struct {
 func (s *mockSigner) SignOutputRaw(ctx context.Context, tx *wire.MsgTx,
 	signDescriptors []*input.SignDescriptor) ([][]byte, error) {
 
+	s.lnd.SignOutputRawChannel <- SignOutputRawRequest{
+		Tx:              tx,
+		SignDescriptors: signDescriptors,
+	}
+
 	rawSigs := [][]byte{{1, 2, 3}}
 
 	return rawSigs, nil