ECE - Misleading line item payment details for subscriptions with signup fee and a free triel

[pierorocca]

Describe the bug

If the merchant enables Apple Pay or Google Pay on the product page, and the product is a subscription product with a free trial, the payment sheet details lacks the information to let the user know that the amount to be charged today is $0.30 (the signup fee) and that the ongoing subscription fee will be $1.00, the frequency of the subscription, and the free trial details.

I suspect this will be true on the cart and checkout pages. We'll also want to check that things like coupons and gift card amount and any other line items in the cart are also passed to the ECE - even for simple products.

Is it possible to use the ECE lineItemsproperty to pass more details related to the simple or variable subscription? And for simple products?

[pierorocca]

I wonder if the lack of even tax and shipping is specific to Apple Pay on mobile only?

[bborman22]

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[cesarcosta99]

Is it possible to use the ECE lineItems property to pass more details related to the simple or variable subscription? And for simple products?

When I confirm the ECE payment I get the following error:

This is similar to what I got in #8152. It shows $1.30, but the actual charge is $0.30 because $1 is the sale price and it will be charged only when trial is over. The only difference here is that the ECE is displayed because of the sign-up fee.

Now, moving on to the payment details. Previously, in the payment request object, we could use the displayItems property where we could add product information that would be displayed in the payment sheet. Now that we're using the elements object, we don't have displayItems or lineItems or something in that direction defined in the docs that we could use.

I've confirmed that by toying with passing displayItems and lineItems to the element and this had no effect in the payment sheet.

All that to say it's not possible to use lineItems, or displayItems, to pass more details to the payment sheet.

[bborman22]

To make the scope on this clear we need to confirm that the following information is visible in the line items:

• The subscription product line item and its monthly price
• Start date of the paid subscription
• Free Trial period if any
• Other fees, each as individual line items.
• Total due now

We also discussed the following approach to solving this to avoid some conflicts:

• Solve cases 4 and 12 from this list
• Solve the bug listed in case 8 from that list
• Then tackle the line items being displayed

Context for this discussion: p1733775068224749/1733421522.827699-slack-C01BZUL57SQ