This is called after the user pays for the items in the transaction.
Implementations should call ISteamMicroTxn/FinalizeTxn before attempting to give the user items.

Called by: Web Purchasing

HTTP Method: POST

Parameters:

Name	Type	Required	Description
key	string	✔	This is the "Asset Server Key" that you provided in your app's Steam Economy Settings on the partner site.
appid	uint32	✔	32bit App ID of the application associated with the asset.
steamid	uint64	✔	64bit Steam ID of the user who is making the purchase.
language	string	✔	ISO639-1 language code plus ISO 3166-1 alpha 2 country code of the language to return strings in. Some examples include en_US, de_DE, zh_CN, and ko_KR. Default: en_US
txnid	uint64	✔	The transaction ID that was returned by StartWebAssetTransaction/v0001
sandbox	uint32		Non-zero if this transaction will use the microtransaction "sandbox" which will not deduct funds from the user's wallet. In this case you should call ISteamMicroTxnSandbox/FinalizeTxn, instead of ISteamMicroTxn/FinalizeTxn. See Microtransactions Implementation Guide for more details.

Returns

The output from this method should be encoded in the JSON format.

Response:

• result
  
  • success - True if the method was successful. If the asset server is returning false, it should set error to a string that explains why.
    
  • error - A string describing why this call failed. This message will be recorded in the error log, which is available by clicking "Steamworks Settings" from the Steamworks App Landing Page, then Community->Economy.
    
  • displaytext - An optional localized error message to display to the user.
    
  • assets - An array of the assets that were generated for the purchase.
    
    • assetid - The 64-bit ID of the asset.
      
    • contextid - The 64-bit ID of the context the asset belongs to.
      

Example Output