question

Alberto Gomez avatar image
Alberto Gomez asked

SubtractUserVirtualCurrency returns Invalid input parameters

I'm calling SubtractUserVirtualCurrency with what I think are the correct type of parameteres, but I get a playfab error that says "Invalid input parameters".

Here is the code:

public void ChangeTreasure()
{
if (GlobalMethods.IsInternetReachable() &&v PlayFabClientAPI.IsClientLoggedIn())
{
SubtractUserVirtualCurrencyRequest request = new SubtractUserVirtualCurrencyRequest();
request.Amount = (int)regenerateTreasure;
request.VirtualCurrency = "GM";
PlayFabClientAPI.SubtractUserVirtualCurrency(request, OnSubstractedVirtualCurrency, OnSubstractionFailed);
}
}

PS: I have the Allow Client to Subtract Virtual Currency option enabled

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5 Answers

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brendan avatar image
brendan answered

There should be an errorDetails returned with any error message from our service. Can you paste the full details for the error response?

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Alberto Gomez avatar image
Alberto Gomez answered

Hi brendanv, I already tried doing that but there are no details.

This is my code to get the errors:
private void OnSubstractionFailed(PlayFabError error)
{
Debug.Log("Error: " + error.ErrorMessage + " || " + error.ErrorDetails);
}

and this is the line that it prints:

"Error: Invalid input parameters ||"

So I'm not able to guess what I'm doing wrong...

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brendan avatar image
brendan answered

Wait - as a guess, are you passing in a negative number? That would cause an invalid parameters response, as the function is designed to subtract the input from the balance. The add function also returns an error if a negative number is passed in, for the same reason.

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Alberto Gomez avatar image
Alberto Gomez answered

And that was exactly the problem. Thanks brendan!!
As a suggestion, could you add to the errorDetails that the amount shouldn't be negative or zero?

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brendan answered

Yes, we'll get that added to the docs. Thanks!

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