func NewItemLog(e event.Event) EventLogger {
return &itemLog{
ID: item.Identifier(e.SubID),
EventID: e.ID,
Num: e.Num,
}
}
func (e *Event) BuildItem() (item.Item, error) {
if !e.IsItem() {
return item.Item{}, errors.New("build error missmatch event " + string(e.ID))
}
return item.ResolveItem(item.Identifier(e.SubID)), nil
}