Response Page

The Response page is a mandatory page and lets you show the result of the transaction to the payer. Our system redirects the payer to this page once the transaction has been performed. The data with the payment results is sent to your system via HTTP GET method
This page is invoked for all the transaction states: approved, rejected, in validation, awaiting payment (for cash), etc.

In this topic, you find how to send data from one transaction to PayU. You must generate an HTML form with the transaction data using the HTTP POST method and pointing it to our system.

Considerations

  • Some hosting providers have settings that do not allow sending URLs as parameter values. example: &merchant_url=http%3A%2F%2Fwww.myshop.com
  • For Brazil accounts, there is no redirection to the response page.
  • Do not depend on the response page to update your database or execute processes, users may not return to it. Use the confirmation page.
  • If you want to display information related to the transaction we suggest to show at least the following: status, reference value, currency and date.
  • It is recommended to send the responseUrl parameter in the payment form or set PayU Module; it has priority the one sent in the parameter. If PayU does not find any, the payment process ends at the Webcheckout.

Variables

Send the following variables to the response page.

Variables to be sent to the response page
Field Type Size Description Applies to
merchantId Numeric 12 Merchant’s ID number in PayU’s system, you find this number in the account creation mail.
transactionState Numeric 2 Indicates the transaction’s status in the system.
See the transaction states in the given column.
risk Decimal (#.00) Risk associated with the transaction. Values between 0 and 1.
The higher value, the greater the risk.Format ###.00.
polResponseCode Alphanumeric 64 Response code.
See the response codes in the given column.
referenceCode Alphanumeric 255 Reference of the sale or order. It must be unique for each transaction sent to the system.
reference_pol Alphanumeric 255 Reference or transaction number generated by PayU.
signature Alphanumeric 255 Digital signature created for each one of the transactions
polPaymentMethod Alphanumeric 255 Internal identifier of the used payment methods
polPaymentMethodType Numeric 2 The type of payment method used for payment.
See the codes of the payment methods.
installmentsNumber Numeric 2 Number of installments in which the credit card payment was deferred.
TX_VALUE Numeric 14,2 Total amount of the transaction. It can contain two decimal digits. For example 10000.00 or 10000
TX_TAX Numeric 14,2 Value of the VAT of the transaction, if no VAT is sent, the system applies 19% automatically.
It can contain two decimal digits, for example 19000.00.
In case you have no VAT you should fill out 0.
buyerEmail Alphanumeric 255 Field that contains the buyer’s email to notify the result of the transaction by email. It is recommended to validate it when the data is taken on a form
processingDate Date (YYYY-MM-DD HH:mm:ss) The date the transaction was made.
currency Alphanumeric 3 The respective currency in which the payment is made. The reconciliation process is performed in pesos at the representative rate of the day.
cus Alphanumeric 255 The CUS, unique tracking code, is the payment’s reference within the Bank, it applies only to payments with PSE. PSE Colombia.
pseBank Alphanumeric 255 The name of the bank, applies only to payments with PSE. PSE Colombia.
lng Alphanumeric 2 Language in which to display the payment gateway.
description Alphanumeric 255 Description of sale.
lapResponseCode Alfa numéric 64 Response code that PayU delivers.
See the responses codes in the given column.
lapPaymentMethod Alphanumeric 255 Payment method used in the payment, for example VISA.
lapPaymentMethodType Alphanumeric 255 Payment method type used in the payment, for example CREDIT_CARD.
lapTransactionState Alphanumeric 32 Transaction status.
See the transaction status in the given column.
message Alphanumeric 255 Description of the transaction status.
extra1 Alphanumeric 255 Additional field to send information about the purchase.
extra2 Alphanumeric 255 Additional field to send information about the purchase.
extra3 Alphanumeric 255 Additional field to send information about the purchase.
authorizationCode Alphanumeric 12 Authorization Code of the sale.
merchant_address Alphanumeric 255 Merchant’s address.
merchant_name Alphanumeric 255 Merchant’s_name
merchant_url Alphanumeric 255 Merchant’s website URL.
orderLanguage Alphanumeric 2 Language of the order (ISO-639-1).
pseCycle Numeric Identifier generated by PSE. PSE Colombia
pseReference1 Alphanumeric 255 Reference no. 1 for PSE payments. PSE Colombia
pseReference2 Alphanumeric 255 Reference no. 2 for PSE payments. PSE Colombia
pseReference3 Alphanumeric 255 Reference no. 3 for PSE payments. PSE Colombia
telephone Alphanumeric 20 Merchant’s phone number.
transactionId Alphanumeric 36 Transaction identifier.
trazabilityCode Alphanumeric 64 Traceability Code of the sale on the merchant’s site.
TX_ADMINISTRATIVE_FEE Decimal (#.00) Value of the administrative fee.
TX_TAX_ADMINISTRATIVE _FEE Decimal (#.00) Value of the tax of the administrative fee.
TX_TAX_ADMINISTRATIVE _FEE_RETURN_BASE Decimal (#.00) Base value of the administrative fee for the tax refund.
action_code_description Alphanumeric 255 VISANET response code description. VISANET Peru
cc_holder Alphanumeric 150 Name of cardholder. VISANET Peru
cc_number Alphanumeric Credit card number. PAN VISANET Peru
processing_date_time Date (YYYY-MM-DD) Date of the sale’s processing. VISANET Peru
request_number Alphanumeric 9 Order Number + transaction identifier VISANET Peru

Integrate the response page

The following is an example in PHP of how you can integrate the response page:

<?php
$ApiKey = "4Vj8eK4rloUd272L48hsrarnUA";
$merchant_id = $_REQUEST['merchantId'];
$referenceCode = $_REQUEST['referenceCode'];
$TX_VALUE = $_REQUEST['TX_VALUE'];
$New_value = number_format($TX_VALUE, 1, '.', '');
$currency = $_REQUEST['currency'];
$transactionState = $_REQUEST['transactionState'];
$firma_cadena = "$ApiKey~$merchant_id~$referenceCode~$New_value~$currency~$transactionState";
$firmacreada = md5($firma_cadena);
$firma = $_REQUEST['signature'];
$reference_pol = $_REQUEST['reference_pol'];
$cus = $_REQUEST['cus'];
$extra1 = $_REQUEST['description'];
$pseBank = $_REQUEST['pseBank'];
$lapPaymentMethod = $_REQUEST['lapPaymentMethod'];
$transactionId = $_REQUEST['transactionId'];

if ($_REQUEST['transactionState'] == 4 ) {
	$estadoTx = "Transaction approved";
}

else if ($_REQUEST['transactionState'] == 6 ) {
	$estadoTx = "Transaction rejected";
}

else if ($_REQUEST['transactionState'] == 104 ) {
	$estadoTx = "Error";
}

else if ($_REQUEST['transactionState'] == 7 ) {
	$estadoTx = "Pending payment";
}

else {
	$estadoTx=$_REQUEST['mensaje'];
}


if (strtoupper($firma) == strtoupper($firmacreada)) {
?>
	<h2>Transaction Summary</h2>
	<table>
	<tr>
	<td>Transaction status</td>
	<td><?php echo $estadoTx; ?></td>
	</tr>
	<tr>
	<tr>
	<td>Transaction ID</td>
	<td><?php echo $transactionId; ?></td>
	</tr>
	<tr>
	<td>Reference sale</td>
	<td><?php echo $reference_pol; ?></td>
	</tr>
	<tr>
	<td>Reference transaction</td>
	<td><?php echo $referenceCode; ?></td>
	</tr>
	<tr>
	<?php
	if($pseBank != null) {
	?>
		<tr>
		<td>cus </td>
		<td><?php echo $cus; ?> </td>
		</tr>
		<tr>
		<td>Bank </td>
		<td><?php echo $pseBank; ?> </td>
		</tr>
	<?php
	}
	?>
	<tr>
	<td>total amount</td>
	<td>$<?php echo number_format($TX_VALUE); ?></td>
	</tr>
	<tr>
	<td>Currency</td>
	<td><?php echo $currency; ?></td>
	</tr>
	<tr>
	<td>Description</td>
	<td><?php echo ($extra1); ?></td>
	</tr>
	<tr>
	<td>Entity:</td>
	<td><?php echo ($lapPaymentMethod); ?></td>
	</tr>
	</table>
<?php
}
else
{
?>
	<h1>Error validating digital signature.</h1>
<?php
}
?>

GET example sent to the response page.

http://mytestsite.com/response.php?&merchantId=508029&merchant_name=Test+PayU+Test&merchant_address=Av+123+Calle+12&telephone=7512354&merchant_url=http%3A%2F%2Fpruebaslapv.xtrweb.com&transactionState=6&lapTransactionState=DECLINED&message=Declinada&referenceCode=2015-05-27+13%3A04%3A37&reference_pol=7069375&transactionId=f5e668f1-7ecc-4b83-a4d1-0aaa68260862&description=test_payu_01&trazabilityCode=&cus=&orderLanguage=es&extra1=&extra2=&extra3=&polTransactionState=6&signature=e1b0939bbdc99ea84387bee9b90e4f5c&polResponseCode=5&lapResponseCode=ENTITY_DECLINED&risk=1.00&polPaymentMethod=10&lapPaymentMethod=VISA&polPaymentMethodType=2&lapPaymentMethodType=CREDIT_CARD&installmentsNumber=1&TX_VALUE=100.00&TX_TAX=.00&currency=USD&lng=es&pseCycle=&buyerEmail=test%40payulatam.com&pseBank=&pseReference1=&pseReference2=&pseReference3=&authorizationCode=&TX_ADMINISTRATIVE_FEE=.00&TX_TAX_ADMINISTRATIVE_FEE=.00&TX_TAX_ADMINISTRATIVE_FEE_RETURN_BASE=.00

Signature validation

The signature validation allows you to check the data integrity, you must generate the signature with the information you find in the response page and compare it with the information from the signature parameter.

To validate the signature in the response page, you should consider:

  • To get the new value new_value, approximate the TX_VALUE to a decimal, using the rounding method Round half to even:
    • If the first decimal is even and the second is 5, round it to the lowest value.
    • If the first decimal is odd and the second is 5, round it to the higher value.
    • Otherwise you must round it to the nearest decimal.
  • Get the parameters to generate the signature (merchantId, referenceCode, TX_VALUE, currency, and transactionState) from the response page, do not get them from your database.
  • You must store your ApiKey safely.
  • Create the signature as follows:
"ApiKey~merchantId~referenceCode~new_value~currency~transactionState"

Examples:

First decimal is an even number and the second is 5

Your apiKey: 4Vj8eK4rloUd272L48hsrarnUA
Parameters get from the response page:
- merchantId = 508029
- referenceCode = TestPayU04
- TX_VALUE = 150.25
- currency = USD
- transactionState = 6

The signature is generated as follows:
MD5(4Vj8eK4rloUd272L48hsrarnUA~508029~TestPayU04~150.2~USD~6) = 00286dc735bd9eaa8ae3a3a4cbb40688

signature = 00286dc735bd9eaa8ae3a3a4cbb40688

First decimal is an odd number and the second is 5

Your apiKey: 4Vj8eK4rloUd272L48hsrarnUA 
Parameters get from the response page: 
- merchantId = 508029
- referenceCode = TestPayU04
- TX_VALUE = 150.35
- currency = USD
- transactionState = 6

The signature is generated as follows:
MD5(4Vj8eK4rloUd272L48hsrarnUA~508029~TestPayU04~150.4~USD~6) = 9df2bb60e2838170009040982967923f

signature = 9df2bb60e2838170009040982967923f 

Other cases

Your apiKey: 4Vj8eK4rloUd272L48hsrarnUA 
Parameters get from the response page: 
- merchantId = 508029
- referenceCode = TestPayU04
- TX_VALUE = 150.34
- currency = USD
- transactionState = 6

The signature is generated as follows:
MD5(4Vj8eK4rloUd272L48hsrarnUA~508029~TestPayU04~150.3~USD~6) = 779f163be9347a691bcdb25064644795

signature = 779f163be9347a691bcdb25064644795 

Compare your signature

Algorithm:  

 ( ~ ~ ~ ~ ~ )


Result: 

This calculator lets you generate the signature using any of the available encryption methods.