"Promise<Response \| undefined>" is not a valid POST return type

[denisprado]

I am getting the follow error when deploying to vercel:

Failed to compile. 16:09:50.139 | src/app/api/webhooks/route.ts 16:09:50.140 | Type error: Route "src/app/api/webhooks/route.ts" has an invalid export: 16:09:50.140 | "Promise<Response | undefined>" is not a valid POST return type: 16:09:50.140 | Expected "Response | Promise", got "Promise<Response | undefined>". 16:09:50.140 | Expected "Promise", got "Promise<Response | undefined>". 16:09:50.140 | Expected "Response", got "Response | undefined". 16:09:50.140 | Expected "Response", got "undefined". `

but I have not changed this file. Any one guess what is happening?

[jonkurtis]

Same. I have not made any changes and now getting this error in build output.

[jonkurtis]

In the webhook this line is the problem: if (!sig || !webhookSecret) return You actually need to throw an error here so that the error will be caught and a Response can be returned. Like this: if (!sig || !webhookSecret) throw new Error("Missing Stripe Signature or Webhook Secret!")

[Shivansh-yadav13]

Thanks @jonkurtis it solved the issue 👍

[chriscarrollsmith]

Opened a PR to fix this issue.

[leerob]

https://github.com/vercel/nextjs-subscription-payments/pull/278