google api dotnet client - Android In-app billing subscription verification failing -


i have android app makes use of android in-app billing v3 make subscription purchases. once subscription purchased in app, information sent server verifies signature , purchase token , gets additional information subscription. using google api .net library this.

purchasesresource.subscriptionsresource.getrequest subscriptiongetrequest =                     service.purchases.subscriptions.get(packagename, productid, purchasetoken); subscriptionpurchase subscriptionpurchase = subscriptiongetrequest.execute(); 

this has been working fine year, since last few days lot of these api calls failing following error:

[google.googleapiexception] google.apis.requests.requesterror purchase token not found. [404] errors [     message[the purchase token not found.] location[token - parameter] reason[purchasetokennotfound] domain[global] ] 

at same time, few other purchases being verified correctly, don't think there wrong in code or way calling google api, know if else has faced issue earlier.

edit: not same question check android purchase status return purchase token not found, seems consumable products. selling subscription products here , users not purchase same products again , again in quick succession.


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