Firebase stripe extension can't make two subscription prices

Question

Firebase, Stripe extension integration.

I have one product on Stripe, and two recurring prices (subscription options)

The problem is appearing when I try to add yearly and monthly subscription options, in line-items, before that I used one subscription option it was sent via the "price" param.

Now When I want to send two subscription prices for the same product on the stripe side, I cannot generate the stripe checkout session... cus "payload" is not good.

This is the code that generated the checkout session.

• I created a product on stripe
• Created two recurring prices
• Take those IDs and included them in line-items
• as the Response checkout session is not created

Note: If I remove line-items and include just one price, and send it with "price: priceId" it works

const checkoutSessionRef = collection(
      firestore,
      `users/${uid}/checkout_sessions`,
    );
    const docData = {
      success_url: url,
      cancel_url: url,
    
      line_items: [
        {
          price: montlyPriceId,
          quantity: 1,
        },
        {
          price: yearlyPriceId,
          quantity: 1,
        },
      ],
    };
}

    await addDoc(checkoutSessionRef, docData);

Documentation explanation on including multiple subscription options in checkout sessions:

Answer 1

You can’t use 2 recurring prices with different billing periods - e.g. annual and monthly - in a single Subscription. You can only combine prices that have the same billing periods - e.g. both monthly, or both annual. If you want the same Customer to have both monthly and annual subscriptions, you will need to create 2 separate Subscriptions, or, in your case, two Checkout Sessions.