Added error

types/lib.go

@@ -426,6 +426,15 @@ type Series struct {
 	Year  int       `json:"year"`
 }
 
+type Error struct {
+	Feature   string    `json:"feature,omitempty"`
+	When      time.Time `json:"when"`
+	Err       string    `json:"err,omitempty"`
+	Stack     string    `json:"stack,omitempty"`
+	InputData string    `json:"input_data,omitempty"`
+	Details   string    `json:"details,omitempty"`
+}
+
 func (s *Series) SetTime(t time.Time) {
 	s.When = t
 	s.Day = t.Day()