private function initFee()
 {
     if (!$this->type->isFinanceRequest()) {
         return;
     }
     $inputData = $this->type->inputs();
     $amount = $inputData['amount'];
     $cur = $inputData['cur'];
     $this->findFee($amount, $cur);
     if (!$this->fee) {
         throw new ProcessorException(ProcessorException::RC_NO_SUCH_FEE);
     }
 }