htlcswitch/payment_result: add (de)serialization of networkResult + test

htlcswitch/payment_result.go

@@ -2,7 +2,9 @@ package htlcswitch
 
 import (
 	"errors"
+	"io"
 
+	"github.com/lightningnetwork/lnd/channeldb"
 	"github.com/lightningnetwork/lnd/lnwire"
 )
 
@@ -46,3 +48,34 @@ type networkResult struct {
 	// which the failure reason might not be included.
 	isResolution bool
 }
+
+// serializeNetworkResult serializes the networkResult.
+func serializeNetworkResult(w io.Writer, n *networkResult) error {
+	if _, err := lnwire.WriteMessage(w, n.msg, 0); err != nil {
+		return err
+	}
+
+	return channeldb.WriteElements(w, n.unencrypted, n.isResolution)
+}
+
+// deserializeNetworkResult deserializes the networkResult.
+func deserializeNetworkResult(r io.Reader) (*networkResult, error) {
+	var (
+		err error
+	)
+
+	n := &networkResult{}
+
+	n.msg, err = lnwire.ReadMessage(r, 0)
+	if err != nil {
+		return nil, err
+	}
+
+	if err := channeldb.ReadElements(r,
+		&n.unencrypted, &n.isResolution,
+	); err != nil {
+		return nil, err
+	}
+
+	return n, nil
+}