Purchase

POST

api/payment-gateway/v1/payments/purchase

The Purchase API is used to initiate a payment transaction between a customer and a merchant through PayWay. It allows merchants to request a payment by providing transaction details such as the amount, currency, item list, and other relevant data.

Once the API is called, the customer is redirected to PayWay’s hosted checkout page, bottom sheet, or modal popup—depending on your integration option—where they can complete the payment using the available methods (e.g., card, ABA PAY, KHQR, digital wallets). After the transaction is completed, PayWay will return the transaction result to the merchant via the configured return URL or callback.

Request

Header Params

Content-Type

string

required

Example:

multipart/form-data

Body Params multipart/form-data

req_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.

<= 30 characters

tran_id

string

required

A unique transaction identifier for the payment.

<= 20 characters

firstname

string

optional

Buyer's first name.

<= 20 characters

lastname

string

optional

Buyer's last name.

<= 20 characters

string

optional

Buyer's email.

<= 50 characters

phone

string

optional

Buyer's phone.

<= 20 characters

type

string

optional

Type of the transaction, default value is purchase. Supported value:

pre-auth : for pre purchase

purchase : for full purchase

Note: pre-auth only support ABA PAY, KHQR and Card Payment.

<= 20 characters

payment_option

string

optional

Payment Methods for Transactions:

cards: For card payments.

abapay: QR payment, allowing users to pay only with ABA Mobile.

abapay_khqr: QR payment that can be scanned and paid using ABA PAY and other KHQR member banks.

abapay_khqr_deeplink: Allows customers to pay using ABA PAY and other KHQR member banks. The payment gateway will respond with a JSON object containing qr_string, abapay_deeplink, and checkout_qr_url. See the sample response in the response section below.

alipay: Allows customers to pay using Alipay Wallet.

wechat: Allows customers to pay using WeChat Wallet.

google_pay: Allows customers to pay using Google Pay Wallet.

If no value is provided, the payment gateway will automatically display the supported payment options based on your profile, allowing the customer to choose a preferred payment method.

<= 20 characters

items

string

optional

A base64-encoded JSON array describing the items being purchased.

PHP Sample Code

Note: This is only description/remark. The price or quantity in this info will not be used for calculation or any validation purposes

<= 500 characters

shipping

number

optional

Shipping fee.

amount

number

required

Purchase amount.

currency

string

optional

Transaction currency of the payment. If you don't pass any value, it will take default value from your merchant profile (the first account's the currency of the first account you registered). Supported values are KHR or USD.

return_url

string

optional

The URL to which PayWay will send the payment notification upon success.

cancel_url

string

optional

The URL to redirect to after the user closes the payment dialog or when user cancel the payment.

continue_success_url

string

optional

The URL to redirect to after a successful payment.

return_deeplink

string

optional

The deep link for redirecting to the app after a successful payment from ABA Mobile. Must be base64-encoded and include both iOS and Android schemes. This field is mandatory for mobile integration.

PHP Sample Code

custom_fields

string

optional

Additional information that you want to attach to the transaction. This information will appear in the transaction list, transaction details and export report. It's base64-encoded JSON info.

PHP Sample Code

return_params

string

optional

Information to include when PayWay calls your return URL after a successful payment.

view_type

string

optional

Defines the view type for the payment page.

hosted_view : redirect payer to a new tab

popup : Display as a bottom sheet on mobile web browsers and as a modal popup on desktop web browsers.

payment_gate

integer

optional

If your merchant profile also supports the QR Payment API service, please set this parameter to 0 to use the Checkout service.

payout

string

optional

Base64-encoded JSON string representing payout details.

PHP Sample Code

additional_params

string

optional

Currently, we support WeChat Mini Program. These are the values key wechat sub_appid and wechat_sub_openid.

PHP Sample Code

lifetime

integer

optional

The payment's lifetime in minutes, once it exceeds customer will not allow to make payment. Default value is no expiry.

Min: 3 mins

Max: 30 days

For ABA PAY or Card: Transaction will not go throught.

KHQR: In case payment happen after exceed life time, PayWay will also reject. Fund will be reverse back to payer.

WeChat & Alipay: No reversal.

google_pay_token

string

optional

This field is required if payment_option is set to google_pay and the payment selection is managed by the merchant. For detailed instructions, please refer to the Google Pay integration guidelines.

hash

string

required

Base64 encode of hash hmac sha512 encryption of concatenates values req_time,merchant_id,tran_id,amount,items,shipping,firstname,lastname,email,phone,type,payment_option,return_url,cancel_url,continue_success_url,return_deeplink,currency,custom_fields,return_params,payout,lifetime,additional_params, and google_pay_token with public_key.

PHP Sample Code

Request samples

Shell

JavaScript

Java

Swift

PHP

Python

HTTP

Objective-C

Ruby

OCaml

Dart

curl --location --request POST 'api/payment-gateway/v1/payments/purchase' \
--header 'Content-Type: multipart/form-data' \
--form 'req_time=""' \
--form 'merchant_id=""' \
--form 'tran_id=""' \
--form 'firstname=""' \
--form 'lastname=""' \
--form 'email=""' \
--form 'phone=""' \
--form 'type=""' \
--form 'payment_option=""' \
--form 'items=""' \
--form 'shipping=""' \
--form 'amount=""' \
--form 'currency=""' \
--form 'return_url=""' \
--form 'cancel_url=""' \
--form 'continue_success_url=""' \
--form 'return_deeplink=""' \
--form 'custom_fields=""' \
--form 'return_params=""' \
--form 'view_type=""' \
--form 'payment_gate=""' \
--form 'payout=""' \
--form 'additional_params=""' \
--form 'lifetime=""' \
--form 'google_pay_token=""' \
--form 'hash=""'

Responses

🟢200Success

text/html

Body

object {0}

Example

<!DOCTYPE html>
<html data-capo="">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalab
<title>PayWay - Checkout</title>
...
</head>
<body>
...
</body>
</html>

🟢200OK

🟢200Exception

Ecommerce Checkout

Get a transaction details