ledger account describibale support

api/pkg/discovery/messages.go

@@ -2,9 +2,9 @@ package discovery
 
 import (
 	"encoding/json"
-	"errors"
 
 	messaging "github.com/tech/sendico/pkg/messaging/envelope"
+	"github.com/tech/sendico/pkg/merrors"
 	"github.com/tech/sendico/pkg/model"
 )
 
@@ -15,7 +15,7 @@ type jsonEnvelope struct {
 
 func (e *jsonEnvelope) Serialize() ([]byte, error) {
 	if e.payload == nil {
-		return nil, errors.New("discovery envelope payload is nil")
+		return nil, merrors.InvalidArgument("discovery envelope payload is nil")
 	}
 	data, err := json.Marshal(e.payload)
 	if err != nil {