luddilo-webhook-events | Stripe Developers | Page 1

lucid stone Nov 23, 2021, 3:26 PM

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scenic agate Nov 23, 2021, 3:29 PM

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I've seen various attempts using various Buffer methods but nothing seems to work for me..

lucid stone Nov 23, 2021, 3:35 PM

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Hi again 👋 I'm less familiar with handling these in a lambda function and would need to do some digging.

lucid stone Nov 23, 2021, 4:43 PM

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Sincere apologies for the delay. This seems to be the most relevant post that I was able to find regarding your scenario, but it looks very similar to what you already have, but they're using capital S's for Stripe-Signature. Maybe that's the cause of the behavior you're experiencing?
https://thomasstep.com/blog/stripe-webhook-integration-with-aws-lambda

Thomas Step

Stripe Webhook Integration with AWS Lambda

Writing code to handle Stripe Webhooks in a Lambda function

scenic agate Nov 23, 2021, 4:47 PM

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What I found out is that in my deployed environment, the body is a Base64 encoded string. In my local dev environment I get a JSON. In order to get the same JSON in the deployed environment I can do:

event = JSON.parse(Buffer.from(lambdaEvent.body, 'base64').toString())

This gives the same error however

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Hmm. Maybe I have to do the same for the sig from headers aswell.. I'll try that next

remote sleet Nov 23, 2021, 4:49 PM

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The signature verification takes three inputs: the request body, the signature header and the webhook secret

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The latter two can be verified by debugging and checking config to ensure the correct values are passed in

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but the body is tricky because it's critical to use the raw request body

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You cannot pass in parsed json etc -- it must be the raw string from the request (whitespace and all)

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