Help Needed: Implementing HMAC Signature Verification for Webhooks in a Remix App

Shopify Partner
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I am trying to write a simple app but cannot overcome the error "Implement an HMAC signature to verify webhooks" during an automated check for common errors in app submission.


My app is just a basic Remix app template from the docs. I know how to implement this using Express. However, in Remix, I see that I can't use webhooks.jsx to add a check because this code only takes control from shopify.server.js when the webhook topic is known (like APP_UNINSTALLED). However, the webhook topic value is unknown when testing from Shopify.


My full code is at

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