Hello
You want use some header, but all data to calculate signature live in get in URL query parameters.
You should use this guide to calculate signature.
https://shopify.dev/apps/online-store/app-proxies#calculate-a-digital-signature
Topic summary
A developer is working on validating incoming requests to a custom Shopify app with a proxy endpoint. They initially tried to use the x-request-id and x-request-sign headers to verify request authenticity.
Resolution:
- Another user clarified that signature validation should use URL query parameters, not headers
- The official Shopify documentation on calculating digital signatures for app proxies was provided as the solution
- The original poster confirmed this resolved their issue
Follow-up question:
A third user asked how to access the x-request-id header within the app proxy, which remains unanswered.
The discussion appears resolved for the original question, though the follow-up query about header access is still open.
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