> For the complete documentation index, see [llms.txt](https://docs.coda.co/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.coda.co/codapay/in-app-payments/unity-sdk-internal-beta-testing-unity-native-integration/unity-sdk-internal-beta-testing-introduction/integration-guide/initiate-payment.md).

# Initiate Payment

**Required Parameters**

| Parameter    | Type    | Description                          |
| ------------ | ------- | ------------------------------------ |
| orderId      | String  | Unique transaction ID (min. 4 chars) |
| price        | Integer | Amount in minor currency units       |
| countryCode  | Enum    | ISO 3166-1 alpha-2 code              |
| currencyCode | Enum    | ISO 4217 currency code               |
| userId       | String  | Unique user identifier               |

**Optional Parameters**:

| Parameter           | Type    | Description                                           |
| ------------------- | ------- | ----------------------------------------------------- |
| itemName            | String  | Name of the item being purchased                      |
| itemCode            | String  | Unique code for the item being purchased              |
| dynamic\_descriptor | String  | Appears on the user’s card/bank statement             |
| webhookUrl          | String  | URL for receiving payment status callbacks            |
| returnUrl           | String  | URL to redirect the user to after payment completion  |
| priceIncludesTax    | Boolean | Indicates if the price includes tax (default is true) |

Here's how you can initialize a payment, please see the example code:

```java
public class TestCodaSDKHandler : MonoBehaviour
{
     public Coda.CountryCode _countryCode = Coda.CountryCode.US; // Set this to Coda.CountryCode.ID to set default country as Indonesia for payment initiation.
     public Coda.CurrencyCode _currencyCode = Coda.CurrencyCode.USD; // // Set this to Coda.CountryCode.IDR to set default currency code as Indonesian Rupiah for payment initiation.
     
     public void OnPurchaseButtonClick()
     {
        Coda.PaymentSDK.InitiatePayment(
        orderId: "order1234",               // Required: Unique transaction ID
        price: 1000,                        // Required: In minor currency units
        countryCode: _countryCode,   // Required: ISO country code enum
        currencyCode: _currencyCode,// Required: ISO currency code enum
        userId: "user456",                  // Required: Unique user identifier
        // Optional
        itemName: "Special Sword",
        itemCode: "sword_001",
        dynamic_descriptor: "MYGAME",
        webhookUrl: "https://yourdomain.com/webhook",
        returnUrl: "https://yourgame.com/success");
    }
}
```

If you haven’t built the UI yet, create a basic Purchase/IAP screen.

Create and attach the script that initiates payment, to the empty GameObject or to the UI screen, base upon the architecture and structure of your game.\
Call `OnPurchaseButtonClick()` on the `OnClick` event of your Buy/Purchase/Upgrade button.

<figure><img src="/files/qLIZFEpCq33LEKUr2hp4" alt=""><figcaption></figcaption></figure>

{% hint style="info" %}
Here, In the current setup `"TestCodaSDKHandler : Monobehaviour"`  script is attached to the empty GameObject named "TestCodaSDKHandler" in the SampleScene. You can setup this according to architecture of your game, just make sure to call  "`Coda.PaymentSDK.InitiatePayment`" function whenever you Initiate the payment process.
{% endhint %}

**Verification**:&#x20;

1. When you play with the help of <img src="/files/Hapa9E065q4nuTXqGwto" alt="" data-size="line"> button on top toolbar and click "Purchase" button in the Game Window, you should be able to see the following screen if you set  `_countryCode = Coda.CountryCode.US & _currencyCode= Coda.CurrencyCode.USD`  in the example script shown above.

   <figure><img src="/files/nTqT7NOfzLR6myq1mFI8" alt="" width="188"><figcaption></figcaption></figure>
2. When you play with the help of <img src="/files/Hapa9E065q4nuTXqGwto" alt="" data-size="line"> button on top toolbar and click "Purchase" button in the Game Window, you should be able to see the following screen if you set `_countryCode = Coda.CountryCode.ID & _currencyCode= Coda.CurrencyCode.IDR`  in the example script shown above.                       &#x20;

   <figure><img src="/files/qUAB9NjIQo5EJlhwvgSq" alt="" width="188"><figcaption></figcaption></figure>


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