Cancel pre-purchase transaction

POST

/api/merchant-portal/merchant-access/online-transaction/pre-auth- cancellation

Cancel pre-auth (or cancel pre-authorization) is the process of releasing a temporary hold on funds placed on a customer's payment method before the final transaction is completed.

Important Notes:

You can only cancel a pre-authorization if the transaction is still pending; if the pre-auth has already been completed or previously cancelled, it cannot be cancelled again.

Each transaction’s pre-authorization can be cancelled only once.

Once the cancellation is successfully processed, the transaction status will update to "CANCELLED."

For ABA PAY and Card transactions, funds are instantly released back to the payer, whereas for KHQR transactions, the funds will be refunded to the payer.

Request

Header Params

Content-Type

string

required

Example:

application/json

Body Params application/json

request_time

string

required

Request date and time in UTC format as YYYYMMDDHHmmss.

merchant_id

string

required

A unique merchant key which provided by ABA Bank.

<= 20 characters

merchant_auth

string

required

The JSON-encoded object containing mc_id and tran_id using RSA public key encryption in chunks. The encrypted data is then concatenated and encoded in Base64 format.

mc_id string mandatory
A unique merchant key which provided by ABA Bank. Same value as merchant_id.

tran_id string mandatory
Pre-auth purcahse transaction id to cancel.

PHP Sample Code

hash

string

required

Base64-encoded HMAC-SHA512 hash of concatenated values: merchant_id, merchant_auth, and request_time with public_key.

PHP Sample Code

Example

{
  "request_time": "20200728093403",
  "merchant_id": "ec000002",
  "merchant_auth": "b1453eac8cd686f...c026a3f70678afd",
  "hash": "wR2bVPV...Q6/llsnJ bw=="
}

Request samples

Shell

JavaScript

Java

Swift

PHP

Python

HTTP

Objective-C

Ruby

OCaml

Dart

curl --location --request POST '/api/merchant-portal/merchant-access/online-transaction/pre-auth- cancellation' \
--header 'Content-Type: application/json' \
--data-raw '{
    "request_time": "20200728093403",
    "merchant_id": "ec000002",
    "merchant_auth": "b1453eac8cd686f...c026a3f70678afd",
    "hash": "wR2bVPV...Q6/llsnJ bw=="
}'

Responses

🟢200OK

application/json

Body

grand_total

number

required

The original amount authorized for pre-auth transactions.

currency

string

required

Original transaction currency

transaction_status

string

required

Status of the transaction. After successfully cancelling, its status is CANCELLED

status

object

required

code

string

required

00: Success!

PTL02: Invalid hash provided. Ensure you are using the correct hash key.

PTL04: Parameter validation failed. Verify that all required fields are correctly formatted.

PTL06: The request has expired. Please generate a new request and retry.

PTL36: Invalid transaction. Ensure that the transaction ID is correct.

PTL62: Invalid merchant information. Verify your merchant ID and try again.

PTL63: Merchant does not have a security configuration file. Contact support for assistance.

PTL59: Unable to complete or cancel Pre-auth. Check the transaction status before retrying.

PTL60: Pre-auth amount exceeds the allowed limit. Reduce the amount and try again.

PTL61: Invalid action type. Ensure you are using a valid operation type.

PTL157: An unexpected error occurred. Please try again later or contact our digital support team.

PTL168: Concurrent requests are not allowed. Wait a few seconds and retry.

PTL169: The merchant profile cannot accept payments. Settlement account is closed.

USD-NOT-ALLOW: The requested amount is not permitted. Choose a valid amount.

KHR-LESS-100: KHR amount must be greater than 100 KHR.

KHR-CONTAIN-DECIMAL: Amount for KHR currency must be a whole number (no decimals allowed).

message

string

required

Please see more details on the property code above.

Examples

SuccessException

{
  "grand_total": 1.5,
  "currency": "USD",
  "transaction_status": "CANCELLED",
  "status": {
    "code": "00",
    "message": "Success"
  }
}

Complete pre-auh transaction with payout

Payout