if ($this->checkStmt($stmt) && $stmt->bind_param('s', $ppheader) && $stmt->execute() && $result = $stmt->get_result()) {
      $this->oUpstream = $result->fetch_object();
      $this->share_type = 'pp_solution';
      if (!empty($this->oUpstream->account) && !empty($this->oUpstream->worker) && is_int($this->oUpstream->id))
        return true;