Request Parameters

HTTP (web) Intent

The gateway URL:

https://apichain.catappult.io/transaction/inapp?value=XXX&currency=XXX&to=XXX&product=XXX&domain=XXX&data=XXX&callback_url=XXX

Request parameters

Parameter	Type	Description_of_field	Static	Optional	Example
value	Double	The value in APPC (AppCoins by default) of the transaction.	N	Y	2.5
currency	String	The currency in which the value is sent, if no currency is sent it is considered APPC (AppCoins).	N	Y	USD or EUR
to	String	The wallet address of the receiver of the transaction. Attention: if your domain is registered on bds, this argument is ignored.	Y	Y	0xda99070eb09ab6ab7e49866c390b01d3bca9d516
product	String	The id of the item being bought.	Y	Y	sword.001
domain	String	The application id, also known as package name.	Y	Y	com.mygamestudio.game
data	String	Additional information to be sent if needed.	N	Y	100 Gems
callback_url	String	The developer's URL to be called after the transaction is completed.	N	Y	https://mygamestudio.co/appcoins?out_trade_no=1234
order_reference	String	Unique identifier of the transaction created by the developer.	N	Y

Callback URL

The composition of the callback URL can contain as query string any parameter relevant to the transaction so that it can be handled on the developer's side. As an example, the following url beside the endpoint contains also a transaction id relevant to the developer.

https://www.mygamestudio.com/v1/appcoins_ipn.php?out_trade_no=2082389608326064

Parameters restriction

There are some ground rules that need to be taken in consideration regarding the parameter combination, when building the URL to call the wallet.

A transaction without product management requires at least the value for the transaction and the package name of the application as below:
https://apichain.catappult.io/transaction/inapp?value=1.50&domain=com.developers.mygame

Parameters possible combinations

value	product	domain	callback_url
✔		✔
✔		✔	✔
	✔	✔
	✔	✔	✔

Note: The currency, to and data parameters are optional. In the case of the value set in the to parameter, if does not match the value defined as the wallet address for the given domain, the value is replaced with the later.