Integration Guide

PayU Hosted Checkout Integration

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PayU provides GPR cards as a solution for PayU partners. This offering includes a comprehensive suite of features such as Min-KYC, Full-KYC, Card Management and Limit Management.

To achieve PCI DSS compliance, merchants can utilize the PayU Card Management SDK solution for both Web and Mobile platforms.

Step 1: Construct JSON for hashing

Create a JSON request and authorization header. Authorization header also contains hash.

Hash string can be create by using the following string and then convert it to SHA-512 hash.

<RequestJsonString>|<Current Date>|<Secure Merchant salt>

To create RequestJsonString (JSON request String) in the above hash string and authorisation header, use the following code:

function createRequestData() {
    return {
        "referenceId": "<String>",
        "redirectUrl": "<String>",
        "mobileNumber": "<String>",
        "walletUrn": "<String>",
        "walletIdentifier": "<String>"
    }
}

function getAuthHeader(date) {
    var data = createRequestData();
    data = JSON.stringify(data);
    date = date.toUTCString();
    var hash_string = data + '|' + date + '|' + salt;
    var hash = CryptoJS.SHA512(hash_string).toString(CryptoJS.enc.Hex);
    var authHeader = 'hmac username="' + values.key + '", ' + 'algorithm=sha512, headers="date", signature="' + hash + '"'
    return authHeader;
}

function getDate() {
    let date = new Date() return date.toUTCString()
}

Description of parameters

ParameterDescription
referenceIdPost any unique reference ID.
redirectUrlPost the last page URL from where merchant is redirect to cards.
mobileNumberPost the customer mobile number.
walletUrnPost the customer wallet URN linked with above mobile number
walletIdentifierPost your wallet identifier

Step 2: Post the request

You can FORM-POST the request with appropriate parameters and it will be redirected to thePayU Virtual Cards OTP  page.

Create request using above functions and submit it as  FORM-POST and it will redirected to PayU Hosted Checkout Card page.

const url = 'https://api.payu.in/loyalty-points/olw/user/card/v1';
const data = < JsonString created by createRequestData > ;
const authorization = < Authorisation header created by getAuthHeader > ;
const formData = new FormData();
formData.append('data', data);
formData.append('Authorization', authorization);
formData.append('Date', < Current Date > .toUTCString());
fetch(url, {
        method: 'POST',
        body: formData
    }).then(response => {
            if (response.status === 500) {
                console.error('Server returned a 500 error');
            } else if (response.ok || response.status === 302) { // Extract the Location header for redirection const redirectUrl = response.url; if (redirectUrl) { window.location.href = redirectUrl; } } else { console.error('Error occurred:', response.status); } }).catch(error => { console.error('Network error:', error); });

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Note:

Date and json request string in hash and post request must be identical.

Step 3: Add meta-tags & scripts in the HTML header

Add the following meta-tag & JS script in the HTML header section of your website:

<meta name="viewport" content="width=device-width, initial-scale=1">
 <script src="https://jssdk.payu.in/ppi/ppi.min.js"></script>`

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Test Script

Replace the script mentioned in the earlier code snippet with https://jssdk-uat.payu.in/ppi/ppi.min.js to test the integration.

Step 4: Pass request objects

The ppi.launch() function takes two arguments.

  • In the first argument, the data objects contain the  request data. The format of the data object is as shown below:
var data = {
    "data": < JsonString created by createRequestData > "Authorization": < Authorisation header created by getAuthHeader > "Date": < Current Date in UTC Format >
}
  • The second argument is the Handler which contains two functions. The responseHandler() function and the catchException() function.

Step 5: Catch exception

The catchException() function captures the error message in case of any exceptions.

var handlers = {
    onCancel: function() {
        console.log("Canceled by user");
    },
    catchException: function(ppi) {
        console.log(ppi);
    }
};
window.ppi.launch(getIframeRequest(), handlers);

Sample request

$(document).on('click', '#submit', function() {
    var data = {
        "data": '{            "referenceId": "123abc",            "redirectUrl": "https://www.google.co.in/",            "mobileNumber": "9528340384",            "walletUrn": "102233",            "walletIdentifier": "OLW"           }'
        "Authorization": 'hmac username="<merchant key>", algorithm="sha512", headers="date", signature="<hash>"'
        "Date": "Wed, 28 Jun 2023 11:25:19 GMT"
    };
    var handlers = {
        onCancel: function() {
            console.log("Canceled by user");
        },
        catchException: function(ppi) {
            console.log(ppi);
        }
    };
    window.ppi.launch(getIframeRequest(), handlers);
});

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Note:

Here, when your customer clicks on the card button (#submit), this code triggers the ppi.launch() function that passes the parameters along with the responseHandler() and catchException()functions as arguments.

Updated about 20 hours ago