Full Refund

The Full Refund API allows merchants to reverse the entire amount of a previously successful and settled transaction through the Edfapay payment gateway, returning the full charged amount back to the customer’s original payment method.

Endpoint

POST https://apidev.edfapay.com/payment/refund

Content-Type: application/json

Request Body

Field	Type	Required	Description
gwayId	string	Yes	Unique transaction ID returned by Edfapay (payment gateway transaction ID)
order_id	string	Yes	Order ID from the merchant's system
edfa_merchant_id	string	Yes	Merchant key provided by Edfapay
hash	string	Yes	Security hash generated to authorize the request
payer_ip	string	Yes	IP address of the payer in IPv4 format.
amount	string	Yes	The full amount of the original transaction

Example Request

curl --location 'https://apidev.edfapay.com/payment/refund' \
--header 'Content-Type: application/json' \
--data '{
    "gwayId": "XXXXXXXXXXXXXXXXXXX",
    "order_id": "1000",
    "edfa_merchant_id": "XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX",
    "hash": "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX",
    "payer_ip": "176.44.76.222",
    "amount": "10.00"
}'

❗️
Important Note — Hash Generation
The hash parameter included in the request body is dynamically generated for each request and must not be hardcoded.
The hash value is calculated using specific request parameters combined with your merchant secret key. Any change in the request data requires regenerating the hash before sending the request.
🔗 For detailed steps and the exact formula used to generate the hash, refer to the Hash Generation Section.

Hash Calculation

To secure the API call from unauthorized access, the hash parameter must be computed using the following formula:

Formula:

hash = SHA1(MD5(UPPERCASE(gwayId+ amount+ merchant_password)))

JavaScript Example using CryptoJS

var to_md5 = gwayId + amount + merchant.pass;

var hash = CryptoJS.SHA1(CryptoJS.MD5(to_md5.toUpperCase()).toString());

var result = CryptoJS.enc.Hex.stringify(hash);

Note

merchant.pass is the shared secret provided by Edfapay for secure communication.

You can obtain the gwayId from the Dashboard on the Transaction page, where it appears as Payment ID.

Alternatively, it can be retrieved from the Webhook (callback) response using the trans_id parameter.

Success Response

{
    "statusCode": 200,
    "responseBody": {
        "result": "accepted",
        "payment_id": "XXXXXXXXXXXXXXXXXXX"
    }
}

The payment_id received for a full refund must be the same payment_id from the original sale transaction.

Error Response

{
    "statusCode": 400,
    "responseBody": {
        "message": "Refund is already initiated."
    }
}

Full Refund Rules and Guidelines

Refund Eligibility

A full refund can only be initiated if the original transaction was successful and captured.

Full Refund Conditions

The refund amount must be equal to the full amount of the original transaction.
A transaction can be fully refunded only once.

❗️
Important Considerations

Full refunds must be handled carefully, as multiple failed refund attempts or technical issues may trigger the cardholder’s bank fraud detection system, potentially temporarily blocking the card.

Ensure each full refund is properly logged and tracked to prevent conflicts or duplicate refund attempts.

Always verify that the transaction is captured before initiating a full refund.