<?php

class TransactionResponse {

    private $respHashKey = "";

    /**
     * @return string
     */
    public function getRespHashKey()
    {
        return $this->respHashKey;
    }

    /**
     * @param string $respHashKey
     */
    public function setRespHashKey($respHashKey)
    {
        $this->respHashKey = $respHashKey;
    }



    public function validateResponse($responseParams)
    {
        $this->writeLog($responseParams);
        
        $str = $responseParams["mmp_txn"].$responseParams["mer_txn"].$responseParams["f_code"].$responseParams["prod"].$responseParams["discriminator"].$responseParams["amt"].$responseParams["bank_txn"];
        $signature =  hash_hmac("sha512",$str,$this->respHashKey,false);
        if($signature == $responseParams["signature"]){
            return true;
        } else {
            return false;
        }

    }

    
	private function writeLog($data){
		$fileName = "date".date("Y-m-d")."-resp.txt";
		$fp = fopen("log/".$fileName, 'a+');
		$data = "\r\n\r\n".date("Y-m-d H:i:s")." - ".$data;
		fwrite($fp,$data);
		fclose($fp);
	}

}