> ## Documentation Index
> Fetch the complete documentation index at: https://developer.tazapay.com/llms.txt
> Use this file to discover all available pages before exploring further.

# vnptpay_vnd

### How It Works

* Users link their bank accounts or top up their VNPT Pay wallets.
* Payments are made by scanning QR codes, making online transactions, or transferring funds to other users.

# Integrating on your website / application

## Step 1: Create a payin

Tazapay uses a `payin` object to represent your intent to collect a payment from your customer. The payin object tracks state changes from transaction creation to payment completion via VNPT Pay.\
Create a payin on your server with an amount, invoice\_currency `VND` and a transaction\_description using the [create payin API](https://developer.tazapay.com/API-Reference/tazapay-api/payin/create-payin)

A payin is created with the status `requires_payment_method`.

### Sample cURL

```json theme={null}
curl --request POST \
     --url https://service-sandbox.tazapay.com/v3/payin \
     --header 'accept: application/json' \
     --header 'authorization: Basic xxxxxxxXXXXxxxxxxxxxxxxxxxxx' \
     --header 'content-type: application/json' \
     --data '
{
  "invoice_currency": "VND",
  "amount": 10000,
  "transaction_description": "Test",
}
'
```

## Step 2: Confirm a payin

Confirm the payin created in step 1 using the confirm payin API. Upon confirmation of the payin, a redirect URL is generated to redirect the customer. The status of the payin moves to `requires_action`

Refer the below for the fields to be passed in `payment_method_details`

### Sample cURL

```json theme={null}
curl --request POST \
     --url https://service-sandbox.tazapay.com/v3/payin/pay_cttprok2ukmk385sbfm0/confirm \
     --header 'accept: application/json' \
     --header 'authorization: Basic xxxxxxxXXXXxxxxxxxxxxxxxxxxx' \
     --header 'content-type: application/json' \
     --data '
{
  "customer_details": {
    "name": "Andrea Lark",
    "email": "andrea@example.com",
    "country": "VN"
  },
  "payment_method_details": {
    "type": "vnptpay_vnd"
  }
}
'
```

### Combining Steps 1 and 2 into a single step

Instead of making 2 API calls, you can also combine steps 1 and 2 into a single API call. To do so, pass the parameters in both the create payin and confirm payin endpoints to the create payin API.

Also, pass the following field and set the field to ‘true’

| Field   | type    | Mandatory (Y/N) | Description                              |
| ------- | ------- | --------------- | ---------------------------------------- |
| confirm | boolean | Y               | To confirm the payin along with creation |

### Sample cURL

```json theme={null}
curl --request POST \
     --url https://service-sandbox.tazapay.com/v3/payin \
     --header 'accept: application/json' \
     --header 'authorization: Basic xxxxxxxXXXXxxxxxxxxxxxxxxxxx' \
     --header 'content-type: application/json' \
     --data '
{
  "customer_details": {
    "name": "Andrea Lark",
    "email": "andrea@example.com",
    "country": "VN"
  },
  "confirm": true,
  "invoice_currency": "VND",
  "amount": 10000,
  "transaction_description": "test",
  "payment_method_details": {
    "type": "vnptpay_vnd"
  }
}
'
```

## Step 3: Getting a success response for the payin created

After confirming the payin, you will receive the following response

```json theme={null}
{
  "status": "success",
  "message": "",
  "data": {
    "amount": 1000000,
    "amount_paid": 0,
    "billing_details": null,
    "cancel_url": "",
    "cancelled_at": null,
    "client_token": "Q2mlTs1IsjjmDKvqhqyzHLkXQy8KdMyoFzmmc5xezJ8=",
    "confirm": true,
    "created_at": "2025-01-23T07:56:49.709190443Z",
    "customer": "cus_cu8vc74lppnoaibo23lg",
    "customer_details": {
      "country": "VN",
      "email": "andrea@example.com",
      "name": "Andrea Lark",
      "phone": null
    },
    "holding_currency": "USD",
    "id": "pay_cu8vcganbet4snrm0cig",
    "invoice_currency": "VND",
    "items": [],
    "latest_payment_attempt": "pat_cu8vcganbet4snrm0cl0",
    "latest_payment_attempt_data": {
      "expires_at": "2025-01-23T08:01:49Z",
      "redirect_url": "https://checkout-sandbox.tazapay.com/single-payment.html?tzid=Q2mlTs1IsjjmDKvqhqyzHLkXQy8KdMyoFzmmc5xezJ8=&spid=aHR0cHM6Ly9jaGVja291dC1zYW5kYm94LnRhemFwYXkuY29tL3NpbXVsYXRlL1EybWxUczFJc2pqbURLdnFocXl6SExrWFF5OEtkTXlvRnptbWM1eGV6Sjg9L3BheV9jdTh2Y2dhbmJldDRzbnJtMGNpZy92bnB0cGF5X3ZuZA=="
    },
    "metadata": null,
    "object": "payin",
    "paid_in_excess": false,
    "partially_paid": false,
    "payment_attempts": [],
    "payment_method_details": {
      "type": "vnptpay_vnd"
    },
    "reference_id": "",
    "shipping_details": null,
    "statement_descriptor": "",
    "status": "requires_action",
    "status_description": "",
    "success_url": "",
    "transaction_data": [],
    "transaction_description": "Test",
    "transaction_documents": [],
    "webhook_url": ""
  }
}
```

> You must redirect the customer to `latest_payment_attempt_data.redirect_url` in order to enable them to complete the payment.

## Step 4: Handle post-payment events

Tazapay sends a `payin.succeeded` event as soon as the funds are received from the customer.  Tazapay sends these events to the endpoint configured from your dashboard. You can receive these events and run actions (for example, sending an order confirmation email to your customers, logging the sale in a database, starting a shipping workflow, etc.)

If the payment is not made by the customer and the URL expires, Tazapay sends a `payment_attempt.failed` after the `payin.processing` event. To generate a new URL, confirm the payin again using Step 2.

| Event                   | Description                                   | Next Steps                                                                                  |
| ----------------------- | --------------------------------------------- | ------------------------------------------------------------------------------------------- |
| payin.succeeded         | The customer paid before 5 days               | Fulfill the goods or services that the customer purchased                                   |
| payment\_attempt.failed | The customer did not pay, and the URL expired | Allow the customer to generate a new URL or complete the payment via another payment method |

# Test the Integration

## Simulating success

Click on `Simulate Success` CTA on the redirect\_url. You will receive a `payin.succeeded` event.

## Simulating Failure

Click on `Simulate Failure` CTA on the redirect\_url. You will receive a `payment_attempt.failed` event.

# Integrating Refunds

You can refund a transaction in two ways - using the [dashboard](https://dashboard.tazapay.com) or using [Refund API](https://developer.tazapay.com/API-Reference/tazapay-api/refund/refund-api).

Bank Initiation supports partial refunds. Specify the amount (lesser than the invoice amount of the payin) for the refund before initiating.

### Refunding using dashboard

Refer to this guide: [https://support.tazapay.com/how-do-i-request-a-refund-from-my-dashboard](https://support.tazapay.com/how-do-i-request-a-refund-from-my-dashboard)

### Refund using API

Sample cURL

```json theme={null}
curl --request POST \
     --url https://service-sandbox.tazapay.com/v3/refund \
     --header 'accept: application/json' \
     --header 'authorization: Basic xxxxxxxXXXXxxxxxxxxxxxxxxxxx' \
     --header 'content-type: application/json' \
     --data '
{
  "payin": "pay_cmiiaamaq0pbt3fkadm0",
  "amount": 5000,
  "currency": "VND",
  "reason": "Customer Return",
  }
'
```

> For full refund, specifying the amount and currency is not required to initiate a refund.