Thai Internet Banking

Enable your customers to make purchases directly from their bank accounts using Internet Banking. This guide walks you through the payment flow and details on how to implement.

For accepting Internet Banking payments with a merchant account registered in Japan, see Konbini, Pay-easy, Online Banking.

How to enable

• Supported Countries: Thailand
• Minimum API version: 2014-07-27

To enable Internet Banking, send an email requesting this feature to support@opn.ooo. You will need to review and accept new terms and conditions.

See a previous version of this guide for instructions on how to implement for API versions prior to 2017-11-02.

Supported banks

Payment flow

Customers paying via Internet Banking go through a redirect payment flow. This means that they are redirected from your website to authorize and confirm the charge. Upon completion, the customer is redirected back to your website.

The following screenshots demonstrate this flow. First, the customer selects Internet Banking as their preferred payment method.

After choosing the bank with which they would like to pay, the customer is redirected to the external page operated by the bank.

The customer reviews the payment amount and confirms the payment. Upon confirmation, the customer is redirected to your website via the specified return URL and Opn Payments will send a webhook event (if enabled) indicating that the charge is complete.

Implementation

To create a charge using Internet Banking, make the following API requests.

1. Create a new payment source (type: internet_banking_bay, or internet_banking_bbl) using Omise.js or one of the mobile SDKs (iOS and Android)
2. Create a new charge using the identifier of the source created in Step 1.
3. After receiving the charge completion webhook event, retrieve the charge to verify its status (optional, but recommended).

Use your public key to create the Internet Banking source on the client (a customer's browser or mobile phone). Use your secret key to create the Internet Banking charge on the server.

If both the creation and charge of a source must happen server-side, you can create and charge the source in a single API request using your secret key.

Creating a source

When the customer confirms that they wish to pay with this payment method, create a new source specifying the amount, currency, and type.

The following examples demonstrate the creation of a new Internet Banking source for ฿4,000. Replace the omise_public_key and $OMISE_PUBLIC_KEY variables with the test public key found on your dashboard.

Using Omise.js, the type parameter is supplied as the first argument to the createSource method.

Omise.setPublicKey(omise_public_key);

Omise.createSource('internet_banking_bay', {
  "amount": 400000,
  "currency": "THB"
}, function(statusCode, response) {
  console.log(response)
});

For testing, you can create the same request using curl.

curl https://api.omise.co/sources \
  -u $OMISE_PUBLIC_KEY: \
  -d "amount=400000" \
  -d "currency=THB" \
  -d "type=internet_banking_bay"

{
  "object": "source",
  "id": "src_5unos3j9g4q2j9b4wa7",
  "livemode": true,
  "location": "/sources/src_5unos3j9g4q2j9b4wa7",
  "amount": 400000,
  "barcode": null,
  "bank": null,
  "created_at": "2023-02-01T01:41:15Z",
  "currency": "THB",
  "email": null,
  "flow": "redirect",
  "installment_term": null,
  "absorption_type": null,
  "name": null,
  "mobile_number": null,
  "phone_number": null,
  "platform_type": null,
  "scannable_code": null,
  "billing": null,
  "shipping": null,
  "items": [],
  "references": null,
  "store_id": null,
  "store_name": null,
  "terminal_id": null,
  "type": "internet_banking_bay",
  "zero_interest_installments": null,
  "charge_status": "unknown",
  "receipt_amount": null,
  "discounts": []
}

The id attribute is the source identifier (begins with src).

Creating a charge

Create a charge specifying the parameters return_uri, source, amount, and currency.

• return_uri specifies the location on your website to which the customer should be redirected after completing the payment authorization step.
• source specifies the source identifier.
• amount and currency must match amount and currency of the source.

The following example demonstrates how to create a new charge using curl. Replace $OMISE_SECRET_KEY with your test secret key found on your dashboard. Replace $SOURCE_ID with the id of the source.

curl https://api.omise.co/charges \
  -u $OMISE_SECRET_KEY: \
  -d "amount=400000" \
  -d "currency=THB" \
  -d "return_uri=https://example.com/orders/345678/complete" \
  -d "source=$SOURCE_ID"

{
  "object": "charge",
  "id": "chrg_5unos3mldhz3nscxmaa",
  "location": "/charges/chrg_5unos3mldhz3nscxmaa",
  "amount": 400000,
  "net": 384378,
  "fee": 14600,
  "fee_vat": 1022,
  "interest": 0,
  "interest_vat": 0,
  "funding_amount": 400000,
  "refunded_amount": 0,
  "transaction_fees": {
    "fee_flat": "0.0",
    "fee_rate": "3.65",
    "vat_rate": "7.0"
  },
  "platform_fee": {
    "fixed": null,
    "amount": null,
    "percentage": null
  },
  "currency": "THB",
  "funding_currency": "THB",
  "ip": null,
  "refunds": {
    "object": "list",
    "data": [],
    "limit": 20,
    "offset": 0,
    "total": 0,
    "location": "/charges/chrg_5unos3mldhz3nscxmaa/refunds",
    "order": "chronological",
    "from": "1970-01-01T00:00:00Z",
    "to": "2023-02-01T01:41:15Z"
  },
  "link": null,
  "description": null,
  "metadata": {},
  "card": null,
  "source": {
    "object": "source",
    "id": "src_5unos38x6wv0v0k5z2u",
    "livemode": true,
    "location": "/sources/src_5unos38x6wv0v0k5z2u",
    "amount": 400000,
    "barcode": null,
    "bank": null,
    "created_at": "2023-02-01T01:41:13Z",
    "currency": "THB",
    "email": null,
    "flow": "redirect",
    "installment_term": null,
    "absorption_type": null,
    "name": null,
    "mobile_number": null,
    "phone_number": null,
    "platform_type": null,
    "scannable_code": null,
    "billing": null,
    "shipping": null,
    "items": [],
    "references": null,
    "store_id": null,
    "store_name": null,
    "terminal_id": null,
    "type": "internet_banking_bay",
    "zero_interest_installments": null,
    "charge_status": "pending",
    "receipt_amount": null,
    "discounts": []
  },
  "schedule": null,
  "customer": null,
  "dispute": null,
  "transaction": null,
  "failure_code": null,
  "failure_message": null,
  "status": "pending",
  "authorize_uri": "https://pay.omise.co/offsites/ofsp_5unos3mn9swedlrx6v2/pay",
  "return_uri": "https://example.com/orders/345678/complete",
  "created_at": "2023-02-01T01:41:15Z",
  "paid_at": null,
  "expires_at": "2023-02-08T01:41:15Z",
  "expired_at": null,
  "reversed_at": null,
  "zero_interest_installments": false,
  "branch": null,
  "terminal": null,
  "device": null,
  "authorized": false,
  "capturable": false,
  "capture": true,
  "disputable": false,
  "livemode": true,
  "refundable": false,
  "reversed": false,
  "reversible": false,
  "voided": false,
  "paid": false,
  "expired": false
}

Creating a source and charge

Alternatively, you can create and charge a source in a single API request.

curl https://api.omise.co/charges \
  -u $OMISE_SECRET_KEY: \
  -d "amount=400000" \
  -d "currency=THB" \
  -d "return_uri=http://example.com/orders/345678/complete" \
  -d "source[type]=internet_banking_bay"

Completing the charge

At this point, you have created a new charge with its status set to pending. Other possible values for charge status are successful, failed, and expired.

The following sections detail how to authorize a charge, receive its completion webhook event, and update its status.

This sequence diagram shows the entire flow.

Authorizing the charge

Redirect the customer to location specified in authorize_uri so that they can authorize the charge.

You can simulate this authorization phase in test mode by visiting the authorize_uri to manually mark the charge as Successful or Failed. After the customer has completed the authorization phase, they will be redirected to the location you specified in return_uri.

Receiving the charge completion event

The best way for you to be notified of the completion of a charge is using webhook events. Set up a location on your server to receive webhook events, and add this location as a webhook endpoint on the dashboard.

Once a charge is completed, a POST request will be sent to this endpoint with the charge response embedded.

The key attribute for the event object contains charge.complete and the data attribute contains the charge object. See Events API for event object structure.

Checking the charge status

After receiving this event, retrieve the charge using its id and confirm that its status matches the status of the charge contained in the event.

If the value of status is successful, you got paid. If the value of status is failed, check the failure_code and failure_message in the charge object for an explanation.

Possible failure codes are listed below.

Voids and refunds

Internet Banking charges cannot be voided or refunded through Opn Payments.

Limits

• Minimum: 2000 (THB20.00)
• Maximum: 15000000 (THB150,000.00)

Next steps

• Charge API
• Source API
• Webhooks API