protected function parseTransactionCode()
    {
        $results = [];
        if (preg_match('/^:61:.*?N(.{3}).*/', $this->getCurrentTransactionData(), $results)
            && !empty($results[1])
        ) {
            return trim($results[1]);
        }
        return '';
    }
protected function parseTransactionCode()
    {
        $results = [];
        if (preg_match('/^:61:.*?N(.{3}).*/', $this->getCurrentTransactionData(), $results)
            && !empty($results[1])
        ) {
            return trim($results[1]);
        }
        return '';
    }
protected function parseTransactionCode ( ) { $ results = [ ] ; if ( preg_match ( '/^:61:.*?N(.{3}).*/' , $ this -> getCurrentTransactionData ( ) , $ results ) && ! empty ( $ results [ 1 ] ) ) { return trim ( $ results [ 1 ] ) ; } return '' ; }
uses the 61 field to get the bank specific transaction code.

@return string
uses the 61 field to get the bank specific transaction code .