return Add error messages

personalities/sctfe/handlers.go

@@ -324,7 +324,7 @@ func addChainInternal(ctx context.Context, li *logInfo, w http.ResponseWriter, r
 	klog.V(2).Infof("%s: %s => storage.Add", li.LogOrigin, method)
 	idx, err := li.storage.Add(ctx, entry)
 	if err != nil {
-		return http.StatusInternalServerError, fmt.Errorf("couldn't store the leaf")
+		return http.StatusInternalServerError, fmt.Errorf("couldn't store the leaf: %v", err)
 	}
 
 	// Always use the returned leaf as the basis for an SCT.