Getting error when trying to parse Webhook response [Sandbox] - "Converting circular structure to JSON"

Question

Hi RevenueCatI’ve got a trouble with adding webhook support to our backend, right now we’re receiving test webhook event but when we are doing parsing we’re getting such error "Converting circular structure to JSON"this error comes from library that we’re using to parse cookies (‘cookie-parser’)as an example that is what we get from your side and in the request we have a number of Circular objects references which couldn’t be parsed by javascript properly, can you explain why it happens and how should we handle this 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Jens · Accepted Answer

Hi @Louise Ferslev, the error you’re seeing happens when you call JSON.serialize on an object that can’t be serialized.I’m not sure what you’re trying to serialize there, but within that object your trying to serialize, the event payload that you’re looking for is within req.body. That part isn’t circular (and it couldn’t be, given that we send it as serialized in our webhook payload).(I am also not sure why you’re trying to serialize this at all, in order to process the payload it would be best to look at the parsed data, not the serialized data.)It seems from the original message that this might be cause by a third party library? If so, that library is trying to serialize something that shouldn’t be serialized. Perhaps you might be passing in the wrong object to that third party library?

Getting error when trying to parse Webhook response [Sandbox] - "Converting circular structure to JSON"

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