kyomen_api

[lilac tiger]

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[serene river]

Hi, let me help you with this.

So what's the exact concern? Checking the ID of the used discount? And ensuring the Coupon is only valid for one month?

You can limit the duration to only one month with this param: https://docs.stripe.com/api/coupons/object#coupon_object-duration_in_months

[digital kestrel]

Hello! Thx for helping.
So I need to know which discount code the user used. eg:
My code is KYO123, and you use it to pay 12 months. I get a physical good on the first month

[digital kestrel]

Oh actually this is done. I just forgot. Now the only concern is knowing what code was used

In my db I'm storing everyones code, so I can gather the rest of the user info based on the code

[serene river]

Are you using Checkout Sessions? Or creating Subscriptions directly?

[digital kestrel]

I'm using the API to create the subscriptions and then presenting the payment sheet in the react native app with the payment intent client secret

Does that answer your question? I didn't know exactly how to answer

const subscription = await stripe.subscriptions.create({
  customer: customerId,
  promotion_code: coupon,
  items: [{ price: planId }],
  payment_behavior: 'default_incomplete',
  payment_settings: { save_default_payment_method: 'on_subscription' },
  expand: ['latest_invoice.payment_intent'],
})

Like this

coupon is the promotion code id actually, not the whole coupon id

[serene river]

You can retrieve it before creating the Subscription and check what customer it belongs to: https://docs.stripe.com/api/promotion_codes/list#list_promotion_code-code

[digital kestrel]

What if the user doesn't pay the subscription?

[serene river]

You can then as well do the check when you get an invoice.paid webhook event.

[digital kestrel]

So we're back to stage one: My problem is that in the Invoice object created w/ the constructEvent method in the webhook, there is no expand prop, and the discounts array in the Invoice is just a list of IDs. However, I can't gather the Discount object with the ID according to the docs

[serene river]

What programming language are you using?

[digital kestrel]

NodeJS for the backend

w/ TS

[serene river]

Alternatively, you can always make a call to retrieve the full Invoice object by ID, as well as any expanded properties.

[serene river]

And as far as I know, you can expand properties in Node.js constructEvent

[digital kestrel]

I'll try that and return in a bit.
Just to be sure: If the promotion code is applied only for the first month, then the discount id will only be present in the first month invoice, right?

[serene river]

Sorry, I think not anymore: https://docs.stripe.com/expand#with-webhooks

[serene river]

I am not sure, it's best to check for yourself in Test mode with test clocks: https://docs.stripe.com/billing/testing/test-clocks

[digital kestrel]

oh okay thx for checking

[digital kestrel]

wow I didn't knew that was possible. I'll try it out, thx a lot

[serene river]

Happy to help.