Code	Error Description
-1	Internal server error
-2	Insufficient funds in the balance
-3	Incorrect amount
-4	Incorrect request body
-5	Access denied

Error Codes In Transaction API

Additional error codes when working with transactions

Error Codes In Gift Service

Additional error codes when purchasing games

Code	Error Description
-51	Invalid link for adding friends
-52	Incorrect app ID
-53	Information about the game not found
-54	The user doesn't have the main game
-55	The user already has the game
-56	Unable to add as a friend
-57	Incorrect customer region specified
-58	The recipient's region is not available for gift
-59	The user did not add/remove the bot from their friends list.

Error Codes In Steam Refill Service

Additional error codes when topping up Steam

Code	Error Description
-100	Incorrect Steam username

Error Codes In Currency API

Additional error codes when working with currency exchange rate APIs

Code	Error Description
-120	Incorrect currency value
-121	Currency not supported

Error Codes In Mobile Refill

Additional error codes when working with Mobile Refill

Code
-200	Mobile game not found
-201	Mobile game position not found
-202	Source variant not found

Error Codes In Vouchers

Additional error codes when working with Vouchers

Code	Error Description
-300	Voucher not Found
-301	Voucher is not available