Server Side Configuration - No Code Payment

This document explains the steps to configure server-side IAP verification.

The now.gg No Code Payment implements server-side verification to ascertain the authenticity of a purchase. On successful verification, the game can allot the purchased product to the user and mark the purchase as consumed.

To implement No Code Payment with your app:

Select ‘No Code Payment’ within nowStudio – Follow this guide.
Implement Server side configurations for ‘No Code Payment’ using the steps below.

Workflow

Here is the workflow associated with now.gg No Code Payment:

The user selects an In-app product to purchase
now.gg Payment will be invoked.
After the payment is successfully processed, the game will get a purchase token.
The game will send the purchase token to its game server for verification.
The game server will verify the purchase token with now.gg server.
The game will assign the purchased in-app product to the user on successful verification.

Implementing Server side Configurations

This section illustrates the steps to implement Server side configurations for ‘No Code Payment’.

1. Verify Purchase

Using this step, you can verify the in-app purchases using now.gg No Code Payment.

Important Information

If you are already verifying your purchases with other providers, you will receive the purchase token in the same URL handler that you are already using.
now.gg purchase token starts with -nowgg-. You can use this to identify the in-app purchases from now.gg.

The following sample illustrates the implementation to verify the in-app purchases:

def verify_purchase(package_name, product_id, purchase_token):

   # game-specific validation code
    
    if purchase_token.startswith("-nowgg-"):
        response = verify_purchase_with_nowgg(
                   package_name, product_id, purchase_token)
    else:
        # continue verification with other providers

   # game-specific response handling code

Sample nowgg verification code

The following sample code illustrates the associated request using the verifyPurchase API.

import requests

  url = "https://payments-api.now.gg/v2/seller/order/verifyPurchase"

  payload = 'purchaseToken=<nowgg_purchase_token>'
  headers = {
  'Authorization': '<payment_api_key_here>',
  'Content-Type': 'application/x-www-form-urlencoded'
  }

  response = requests.request("POST", url, headers=headers, data=payload)

  print(response.text)

Important Information

PurchaseToken – Use the purchaseToken you received from the URL handler.
API Key – The Payments API Key can be found within the credentials section of nowStudio. More information.

Expected Response

The following is a sample response from the verifyPurchase API.

{
    "success": true,
    "code": 0,
    "codeMsg": "success",
    "data": {
      "purchaseTimeMillis": "1630529397125", // This field has been deprecated, use purchaseTime instead.
      "purchaseTime": "1630529397125",
      "purchaseState": 0,
      "consumptionState": 0,
      "developerPayload": "<developer_payload>",
      "orderId": "<orderId_here>",
      "kind": "nowgg#productPurchase",
      "regionCode": "US",
      "currency": "USD",
      "packageName": "<package_name>",
      "payStatusTxt": "Paid",
      "orderAmount": "25.15",
      "isTestOrder": false,
      "payTimeTxt": "2024 - 10 - 3006: 08: 01",
      "sellerGoodsId": "11223343"
    }
 }

Response Params

Params	Type	Description
success	boolean	Returns success as true or false.
code	int	Returns 0 for success and non-zero for failure.
codeMsg	string	Returns msg related to error code. (Provided here)
purchaseTimeMillis (DEPRECATED)	string	The time the product was purchased, in milliseconds since the epoch. This field has been deprecated, use `purchaseTime` instead.
purchaseTime	string	The time the product was purchased, in seconds since the epoch.
purchaseState	int	The purchase state of the order. Possible values are: 0: Unpaid, 1: Paid, 2: Failed
consumptionState	int	The consumption state of the in-app product. Possible values are: 0: Yet to be consumed, 1: Consumed
developerPayload	string	A developer-specified string containing supplemental information about an order.
orderId	string	The order ID (Unique transaction identifier) associated with every in-app purchase product.
kind	string	The kind of in-app product purchased with a hardcoded type `nowgg#productPurchase`.
regionCode	string	ISO 3166-1 alpha-2 billing region code of the user at the time the product was granted.
currency	string	The currency of the purchase. Examples – USD, INR, etc.
packageName	string	The `packageName` associated with your app.
payStatusTxt	string	Payment status as Paid or Unpaid.
orderAmount	string	The `orderAmount` of your purchase.
isTestOrder	boolean	Returns results as true or false if the order is generated during testing.
payTimeTxt	string	Payment date and time associated with a purchase.
sellerGoodsId	string	The product ID is associated with the purchased product.

2. Consume Purchase

After you have verified the purchase, you should mark it as consumed.

Purchase consumption involves:

Assigning the purchased product to the user.
Notifying now.gg that the product has been consumed.

Sample Consume Purchase Code

The following sample code illustrates the associated request using the consumePurchase API.

import requests

  url = "https://payments-api.now.gg/v2/order/consumePurchase"

  payload = 'purchaseToken=-nowgg-purchaseToken'
  headers = {
    'Authorization': 'payment_api_key_here',
    'Content-Type': 'application/x-www-form-urlencoded'
  }

  response = requests.request("POST", url, headers=headers, data=payload)

  print(response.text)

Important Information

PurchaseToken – Use the purchaseToken you received from the URL handler.
API Key – The Payments API Key can be found within the credentials section of nowStudio. More information.

Expected Response

The following is a sample response from the consumePurchase API.

 }  
   "success": true,
   "code": 0,
   "codeMsg": "success",
   "data": {}
 }

Response Params

Params	Type	Description
success	boolean	Returns success as true or false.
code	int	Returns 0 for success and non-zero for failure.
codeMsg	string	Returns msg related to error code. (Provided here)
data	object	Data returned as a response.

Error Code Mapping

Error Code	Message	Description
3800	ERROR_CONSUMING_PRODUCT	There was an error consuming the product.
3900	INVALID_AUTHORIZATION_KEY	The API Key provided for authorization is invalid.
3901	INVALID_PURCHASE_TOKEN	The provided purchase token is invalid.

Sequence Diagram

The following sequence diagram illustrates the entire flow associated with ‘No Code Payment’.

Server Side Configuration - No Code Payment

Workflow

Implementing Server side Configurations

Contents

1. Verify Purchase

Important Information

Sample nowgg verification code

Important Information

Expected Response

Response Params

2. Consume Purchase

Sample Consume Purchase Code

Important Information

Expected Response

Response Params

Error Code Mapping

Sequence Diagram