Questions about transaction API call

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Anh Le asked May 16, '18

Questions about transaction API call

I'd like to ask about the technique to optimize the update for multiple VirtualCurrency, Inventory at the same time; and handle the rollback in case there is any issues happening.

The case is: An user opens a loot box with 10 gem (virtual currency). He gets 100 gold (another virtual currency) and 1 item in the inventory.

The custom server checks the logic and verify the transaction then call 3 API to update:

AddUserVirtualCurrency (Add gold)
SubtractUserVirtualCurrency (Decrease gem)
GrantItemsToUser (Add item)

My questions are:

Is there any way to use 1 API to handle all these requests?
If there is any issue when calling these API, is there any way to rollback the process (ex: revoke the item, add back gem and reduce gold)?

apis Custom Game Servers Player Inventory

10 |1200

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Answer 1 · 2018-05-16T18:31:37Z

pfnathan answered May 16, '18

1). Only way you could do is using a cloud script. Cloud script can make multiple calls and then return all of the results together.

2). If the issue is in user state like; they have 50 gold in their inventory then they are granted with 100gold and GetVC call indicates they have 151 gold now then what you can do is manually call subtract on 100 gold they were granted and that would "roll back"

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10 |1200

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brendan commented · May 17, 2018 at 07:20 AM

@Le Giang Anh Why not just have all the items in the Container? Then, you only have to make one call to UnlockContainer, and all VCs and items will be added to the player account.

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