Nakama Google In-App Purchase Validation

Game Design
1

Hello,

May I ask a question about an error message I got when trying to validate a Google In-App Purchase?

I’m using Unity client and call Client.ValidatePurchaseGoogleAsync to valiadatee the receipt.

Here‘s the receipt:

2024/06/18 21:57:54.494 7434 7464 Info Unity !!! Receipt: {“Payload”:"{"json":"{\"orderId\":\"GPA.3371-5367-4976-34250\",\"packageName\":\"com.Snowbornever.projectcatclient\",\"productId\":\"petidle.gold\",\"purchaseTime\":1718762270926,\"purchaseState\":0,\"purchaseToken\":\"gfddgiphabcjafjbanomlaae.AO-J1OyiQTiyVj_BgAdSULfyEWfz8CD3vd64Za8d168I_D4OKxD6vAsje578l0XcHkoAIyqeh3qaNB3HjhQc5AZ4VRv0pjIJ9cYDrnAIa7P8Sm6RWVj7ows\",\"quantity\":1,\"acknowledged\":false}","signature":"XaZYW1wk8rJM3TFoWd+p4wxuF0xG7Or8nA6gxSgpORWeIDe3jxtySpRaxRXp+BYpG9bG3tOXtZhlmut0OQbLOgdihnEppzGgKGLktiQTQEmh11wI5rgZL8UcBe4bvjPSr3qpEzyKNeCBaKW+SGmVQahfXTg1ulBiD2zdwzhFj1NiExgLMI0wlfYhenBMfbBOkGVJemBNz5Z7KQV00dXin5d84nZw4xhywtqCQsShho93zO7lGx6IFUsSJIe5GPjldgfc9wsfN2C4txqo1vbiHv/dOX+VXR/HWtceIwUoqEi+RwWaL0Jfh595UG+I8RzeAYtvqIsJDl4Z6mXdUAIQ1Q==","skuDetails":["{\"productId\":\"petidle.gold\",\"type\":\"inapp\",\"title\":\"Gold (com.Snowbornever.projectcatclient (unreviewed))\",\"name\":\"Gold\",\

here’s the server log:

2024/06/18 21:58:00.075 7434 7464 Error Unity ApiResponseException: {“code”:2,“message”:“receipt is malformed”}

{“level”:“error”,“ts”:“2024-06-19T01:58:00.198Z”,“caller”:“server/core_purchase.go:185”,“msg”:“Error validating Google receipt”,“error”:“receipt is malformed”}

I think I’ve followed the instructions well. Please help!

2

it seems that Nakama wasn’t able to use the service account I provided to do receipt validation.
I tried to disable the service account and it gave me the same “receipt is malformed” error.

3

here’s the permissions I gave to the service account.

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image1200×850 84.8 KB

5

Hello @lichengz,

What Nakama version are you running?

6

Hi, I’m running the latest 3.22

7

Please make sure you’re sending the receipt as a JSON encoded string.

8

do you mean that the following is wrong?

{"name":"Error","message":"hello"}

instead, it should be the following?

"{\"name\":\"Error\",\"message\":\"hello\"}"

Sorry, I’m new to Json encoding.

9

I’m using Unity IAP package and passing the following “receipt” json string to Nakama.

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image1240×375 63.2 KB

10

Yes, but also, only what’s contained in Payload should be sent to Nakama for validation.

11

thanks for pointing this out!

now I got the following, which I think is one step further :smiley:
2024/06/19 12:24:35.584 8856 8881 Error Unity ApiResponseException: {“code”:2,“message”:“non-200 response from Google service, status=401, payload={\n "error": {\n "code": 401,\n "message": "The current user has insufficient permissions to perform the requested operation.",\n "errors": [\n {\n "message": "The current user has insufficient permissions to perform the requested operation.",\n "domain": "androidpublisher",\n "reason": "permissionDenied"\n }\n ]\n }\n}\n”}

12

ok, problem solved!
another note here:
the activation of service account could take many hours. My most recently created services account failed to work and my another older account works perferctly now.

Thanks for your help!!!

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