public function calculateHash()
    {
        $str =  $this->data['ECM_TRANS_ID'] .
                $this->data['ECM_TRANS_DATE'] .
                $this->request->getPurse() .
                $this->data['ECM_PAYER_ID'] .
                $this->data['ECM_ITEM_COST'] .
                $this->data['ECM_QTY'] .
                $this->request->getSecret();

        return md5($str);
    }
public function calculateHash()
    {
        $str =  $this->data['ECM_TRANS_ID'] .
                $this->data['ECM_TRANS_DATE'] .
                $this->request->getPurse() .
                $this->data['ECM_PAYER_ID'] .
                $this->data['ECM_ITEM_COST'] .
                $this->data['ECM_QTY'] .
                $this->request->getSecret();

        return md5($str);
    }
public function calculateHash ( ) { $ str = $ this -> data [ 'ECM_TRANS_ID' ] . $ this -> data [ 'ECM_TRANS_DATE' ] . $ this -> request -> getPurse ( ) . $ this -> data [ 'ECM_PAYER_ID' ] . $ this -> data [ 'ECM_ITEM_COST' ] . $ this -> data [ 'ECM_QTY' ] . $ this -> request -> getSecret ( ) ; return md5 ( $ str ) ; }
Calculate hash to validate incoming confirmation.

@return string
Calculate hash to validate incoming confirmation .