multi: pass UpdateAddHtlc message custom records to invoice modifier

htlcswitch/interfaces.go

@@ -33,6 +33,7 @@ type InvoiceDatabase interface {
 	NotifyExitHopHtlc(payHash lntypes.Hash, paidAmount lnwire.MilliSatoshi,
 		expiry uint32, currentHeight int32,
 		circuitKey models.CircuitKey, hodlChan chan<- interface{},
+		wireCustomRecords lnwire.CustomRecords,
 		payload invoices.Payload) (invoices.HtlcResolution, error)
 
 	// CancelInvoice attempts to cancel the invoice corresponding to the

htlcswitch/link.go

@@ -3846,7 +3846,7 @@ func (l *channelLink) processExitHop(add lnwire.UpdateAddHTLC,
 
 	event, err := l.cfg.Registry.NotifyExitHopHtlc(
 		invoiceHash, add.Amount, add.Expiry, int32(heightNow),
-		circuitKey, l.hodlQueue.ChanIn(), payload,
+		circuitKey, l.hodlQueue.ChanIn(), add.CustomRecords, payload,
 	)
 	if err != nil {
 		return err

htlcswitch/mock.go

@@ -1049,11 +1049,12 @@ func (i *mockInvoiceRegistry) SettleHodlInvoice(
 func (i *mockInvoiceRegistry) NotifyExitHopHtlc(rhash lntypes.Hash,
 	amt lnwire.MilliSatoshi, expiry uint32, currentHeight int32,
 	circuitKey models.CircuitKey, hodlChan chan<- interface{},
+	wireCustomRecords lnwire.CustomRecords,
 	payload invoices.Payload) (invoices.HtlcResolution, error) {
 
 	event, err := i.registry.NotifyExitHopHtlc(
-		rhash, amt, expiry, currentHeight, circuitKey, hodlChan,
-		payload,
+		rhash, amt, expiry, currentHeight, circuitKey,
+		hodlChan, wireCustomRecords, payload,
 	)
 	if err != nil {
 		return nil, err