Merchant Hosted Integration

The pre_authorize parameter is used to pre-authorize payments using the Merchant Hosted Checkout integration with the _payment API.

📘
Note: You need to activate the Pre-Authorize Payments before you start using this integration. Contact your PayU Key Account Manager (KAM) to activate Pre-Authorize Payments.

Step 1: Post the Pre-Auth transaction request

Post the additional parameters for with the Pre-Authorization using the Merchant Hosted Checkout. For complete list of parameters, refer to Pre-Authorize Payment for the complete list parameters with Try It experience.

Environment


Test Environment	https://test.payu.in/_payment
Production Environment	https://secure.payu.in/_payment

The pre_authorize parameter as specified is used to pre-authorize payments using the Merchant Hosted Checkout integration with the _payment API.

Request parameters

Parameter	Description	Example
key `mandatory`	`String`Merchant key provided by PayU during onboarding.	JP***g
txnid `mandatory`	`String`The transaction ID is a reference number for a specific order that is generated by the merchant.	sdlkfj394ru3495
amount `mandatory`	`String`The payment amount for the transaction.	10.00
productinfo `mandatory`	`String`A brief description of the product.	iPhone
firstname `mandatory`	`String` The first name of the customer.	Ashish
email `mandatory`	`String`The email address of the customer.	[email protected]
phone `mandatory`	`String`The phone number of the customer.
pg `mandatory`	`String` The pg parameter determines which payment tabs will be displayed on the PayU page. For cards, 'CC' will be the value.	CC
bankcode `mandatory`	`String` Each payment option is identified with a unique bank code at PayU. The merchant must post this parameter with the corresponding payment option's bank code value in it. For more information, refer to Card Type Codes and Supported Banks for Cards.	AMEX
ccnum `mandatory`	`String` Use 13-19 digit card number for credit/debit cards (15 digits for AMEX, 13-19 for Maestro) and validate with LUHN algorithm. Refer to Card Number Formats and display error message on invalid input.	5123456789012346
ccname `mandatory`	`String` This parameter must contain the name on card – as entered by the customer for the transaction.	Ashish Kumar
ccvv `mandatory`	`String` Use 3-digit CVV number for credit/debit cards and 4-digit security code (4DBC/CID) for AMEX cards. Validate with BIN API.	123
ccexpmon `mandatory`	`String` This parameter must contain the card's expiry month – as entered by the user for the transaction. It must always be in 2 digits or in MM format. For months 1-9, this parameter must be appended with 0 – like 01, 02…09. For months 10-12, this parameter must not be appended – It should be 10,11 and 12 respectively.	10
ccexpyr `mandatory`	`String` This parameter must contain the card's expiry year – as entered by the customer for the transaction. It must be of four digits.	2021
furl `mandatory`	`String`The success URL, which is the page PayU will redirect to if the transaction is successful.
surl `mandatory`	`String`The Failure URL, which is the page PayU will redirect to if the transaction is failed.
pre_authorize `mandatory for Pre-Auth`	This parameter is set to 1to pre-authorize payment using PayU Hosted Checkout.
hash `mandatory`	`String`It is the hash calculated by the merchant. The hash calculation logic is: `sha512(key\|txnid\|amount\|productinfo\|firstname\|email\|udf1\|udf2\|udf3\|udf4\|udf5\|\|\|\|\|\|SALT)`
address1 `optional`	`String` The first line of the billing address. For Fraud Detection*: This information is helpful when it comes to issues related to fraud detection and chargebacks. Hence, it is must to provide the correct information.
address2 `optional`	`String` The second line of the billing address.
city `optional`	`String` The city where your customer resides as part of the billing address.
state `optional`	`String` The state where your customer resides as part of the billing address,
country `optional`	`String` The country where your customer resides.
zipcode `optional`	`String` Billing address zip code is mandatory for the cardless EMI option. `Character Limit`-20
udf1 `optional`	`String` User-defined fields (udf) are used to store any information corresponding to a particular transaction. You can use up to five udfs in the post designated as udf1, udf2, udf3, udf4, udf5.
udf2 `optional`	`String` User-defined fields (udf) are used to store any information corresponding to a particular transaction. You can use up to five udfs in the post designated as udf1, udf2, udf3, udf4, udf5.
udf3 `optional`	`String` User-defined fields (udf) are used to store any information corresponding to a particular transaction.
udf4 `optional`	`String` User-defined fields (udf) are used to store any information corresponding to a particular transaction.
udf5 `optional`	`String` User-defined fields (udf) are used to store any information corresponding to a particular transaction.

Hashing

You must hash the request parameters using the following hash logic:

sha512(key|txnid|amount|productinfo|firstname|email|udf1|udf2|udf3|udf4|udf5||||||SALT)

For more information, refer to Generate Hash.

Sample request

curl --request POST      --url 'https://test.payu.in/_payment?form=2'      --header 'Content-Type: application/x-www-form-urlencoded'      --header 'accept: text/plain'      --data key=JPM7Fg      --data pg=CC      --data bankcode=CC      --data pre_authorize=1      --data surl=https://test-payment-middleware.payu.in/simulatorResponse      --data furl=https://test-payment-middleware.payu.in/simulatorResponse      --data txnid=ypskjfdaaksdjfh      --data amount=10000      --data productinfo=iPhone      --data firstname=Ashish      --data [email protected]      --data phone=9889XXXXXX      --data ccnum=512*******012346      --data ccname=Ashish      --data ccexpmon=11      --data ccexpyr=2025      --data ccvv=123      --data hash=d99f230c19d781016fa64c57f976d0ec8ff3761fe5d9d6448933cf46d7177db6fb7b370e551e39dd37f2045a2a761f9065f8462838bbaad22963c083c84f9ced

Step 2: Check the response from PayU

Hash validation logic for payment response (Reverse Hashing)

While sending the response, PayU takes the exact same parameters that were sent in the request (in reverse order) to calculate the hash and returns it to you. You must verify the hash and then mark a transaction as a success or failure. This is to make sure the transaction has not tampered within the response.

The order of the parameters is similar to the following code block:

sha512(SALT|status||||||udf5|udf4|udf3|udf2|udf1|email|firstname|productinfo|amount|txnid|key)

Sample response

The formatted sample response body is similar to the following, and you need to look for the following parameters:

PG_TYPE: CC PG
bankcode: CC
unamappedstatus: auth

  {
  "mihpayid": "403993715531065775",
  "mode": "CC",
  "status": "success",
  "unmappedstatus": "captured",
  "key": "JPM7Fg",
  "txnid": "ypskjfdaaksdjfh",
  "amount": "10000.00",
  "cardCategory": "domestic",
  "discount": "0.00",
  "net_amount_debit": "10000",
  "addedon": "2024-02-26 07:20:56",
  "productinfo": "iPhone",
  "firstname": "Ashish",
  "lastname": "",
  "address1": "",
  "address2": "",
  "city": "",
  "state": "",
  "country": "",
  "zipcode": "",
  "email": "[email protected]",
  "phone": "9889843845",
  "udf1": "",
  "udf2": "",
  "udf3": "",
  "udf4": "",
  "udf5": "",
  "udf6": "",
  "udf7": "",
  "udf8": "",
  "udf9": "",
  "udf10": "",
  "hash": "00f188fdda2d60d418b147e7dce3a6ead172cf760a95a4df09b763f7627c01d867127e022de97841f1fe41cecb420b12b482fd8b68aaf66476b840bdfe82ca3c",
  "field1": "261005309469848160",
  "field2": "724760",
  "field3": "10000.00",
  "field4": "",
  "field5": "00",
  "field6": "02",
  "field7": "AUTHPOSITIVE",
  "field8": "AUTHORIZED",
  "field9": "Transaction is Successful",
  "payment_source": "payu",
  "PG_TYPE": "CC-PG",
  "bank_ref_num": "261005309469848160",
  "bankcode": "CC",
  "error": "E000",
  "error_Message": "No Error",
  "cardnum": "XXXXXXXXXXXX2346",
  "cardhash": "This field is no longer supported in postback params.",
  "splitInfo": "{"splitStatus":"splitNotReceived","splitSegments":[]}"
}

Step 3: Capture a Pre-authorized payment

To capture a pre-authorized payment, use the following command. After the API command is successful, the transaction would be captured and settled to you.

Environment

Environment	URL
Test Environment	https://test.payu.in/merchant/postservice?form=2
Production Environment	https://info.payu.in/merchant/postservice?form=2

Sample request

curl --location --request POST 'https://info.payu.in/merchant/postservice.php?form=2' \ 
--header 'Content-Type: application/x-www-form-urlencoded' \ 
--form 'key="JF***g"' \ 
--form 'command="capture_transaction"' \ 
--form 'hash="67411736ab98c59522492a12751a6015c41b87764019f9dc14052690c2c7af9095d31002fc109dcf3596c2f38792d56db6f6207b1989010f2adf51c144fa3019"' \ 
--form 'var1="15246574846"' \ 
--form 'var2="authorizeTransaction123"' \ 
--form 'var3="1"'

Sample response

{ 
    "status": 1, 
    "msg": "Capture Request Queued", 
    "request_id": "Request ID", 
    "bank_ref_num": "Bank Reference Number" 
}

Step 3: Check Action Status

Upon receiving the response, we recommend performing a reconciliation step to validate all transaction details.
You can verify your payments using either of the following methods:

Configure the webhooks to monitor the status of payments.
Webhooks enable a server to communicate with another server by sending an HTTP callback or message.
These callbacks are triggered by specific events or instances and operate at the server-to-server (S2S) level.

👉 For more details, refer to Webhooks for Payments.

📘
Notes:

The unamappedstatus to auth can be checked using thje Verify Payment API and in callback response in the Transaction callback.

To check the status of the Auth Request and then Capture Request sent, use the check_action_status API. For more information, refer to Check Refund Status API with Request ID.

If you want to cancel or refund a pre-authorized payment, refer to Cancel a Pre-Authorized Payment.

👍
Reference: For cancelling pre-auth payments, refer to Cancel a Pre-Authorized Transaction API.

Updated 4 days ago

Step 1: Post the Pre-Auth transaction request

Hashing

Step 2: Check the response from PayU

Hash validation logic for payment response (Reverse Hashing)

Step 3: Capture a Pre-authorized payment

Step 3: Check Action Status

EXAMPLE QUESTIONS