multi: replace NotifyExitHopHtlc eob param with hop.Payload

invoices/interface.go

@@ -0,0 +1,11 @@
+package invoices
+
+import "github.com/lightningnetwork/lnd/record"
+
+// Payload abstracts access to any additional fields provided in the final hop's
+// TLV onion payload.
+type Payload interface {
+	// MultiPath returns the record corresponding the option_mpp parsed from
+	// the onion payload.
+	MultiPath() *record.MPP
+}

invoices/invoiceregistry.go

@@ -429,7 +429,7 @@ func (i *InvoiceRegistry) LookupInvoice(rHash lntypes.Hash) (channeldb.Invoice,
 func (i *InvoiceRegistry) NotifyExitHopHtlc(rHash lntypes.Hash,
 	amtPaid lnwire.MilliSatoshi, expiry uint32, currentHeight int32,
 	circuitKey channeldb.CircuitKey, hodlChan chan<- interface{},
-	eob []byte) (*HodlEvent, error) {
+	payload Payload) (*HodlEvent, error) {
 
 	i.Lock()
 	defer i.Unlock()