sweepbatcher: fix height hint for confirmations

sweepbatcher/sweep_batch.go

@@ -1707,13 +1707,20 @@ func (b *batch) monitorSpend(ctx context.Context, primarySweep sweep) error {
 
 // monitorConfirmations monitors the batch transaction for confirmations.
 func (b *batch) monitorConfirmations(ctx context.Context) error {
+	// Find initiationHeight.
+	primarySweep, ok := b.sweeps[b.primarySweepID]
+	if !ok {
+		return fmt.Errorf("can't find primarySweep")
+	}
+
 	reorgChan := make(chan struct{})
 
 	confCtx, cancel := context.WithCancel(ctx)
 
 	confChan, errChan, err := b.chainNotifier.RegisterConfirmationsNtfn(
 		confCtx, b.batchTxid, b.batchPkScript, batchConfHeight,
-		b.currentHeight, lndclient.WithReOrgChan(reorgChan),
+		primarySweep.initiationHeight,
+		lndclient.WithReOrgChan(reorgChan),
 	)
 	if err != nil {
 		cancel()

sweepbatcher/sweep_batcher_test.go

@@ -781,12 +781,15 @@ func testSweepBatcherSimpleLifecycle(t *testing.T, store testStore,
 		Notifier: &dummyNotifier,
 	}
 
+	const initiationHeight = 550
+
 	swap1 := &loopdb.LoopOutContract{
 		SwapContract: loopdb.SwapContract{
-			CltvExpiry:      111,
-			AmountRequested: 111,
-			ProtocolVersion: loopdb.ProtocolVersionMuSig2,
-			HtlcKeys:        htlcKeys,
+			CltvExpiry:       111,
+			AmountRequested:  111,
+			ProtocolVersion:  loopdb.ProtocolVersionMuSig2,
+			HtlcKeys:         htlcKeys,
+			InitiationHeight: initiationHeight,
 		},
 
 		DestAddr:        destAddr,
@@ -871,14 +874,17 @@ func testSweepBatcherSimpleLifecycle(t *testing.T, store testStore,
 		SpendingTx:        spendingTx,
 		SpenderTxHash:     &spendingTxHash,
 		SpenderInputIndex: 0,
-		SpendingHeight:    601,
 	}
 
 	// We notify the spend.
 	lnd.SpendChannel <- spendDetail
 
 	// After receiving the spend, the batch is now monitoring for confs.
-	<-lnd.RegisterConfChannel
+	confReg := <-lnd.RegisterConfChannel
+
+	// Make sure the confirmation has proper height hint. It should pass
+	// the swap initiation height, not the current height.
+	require.Equal(t, int32(initiationHeight), confReg.HeightHint)
 
 	// The batch should eventually read the spend notification and progress
 	// its state to closed.