Release 3.8.0: applePayStyle + Accelerated Checkouts StoreFront API 2026-04

[kieran-osgood-shopify]

What changes are you making?

Bump to 3.8.0 of swift SDK
I noticed we were missing ReadMe documentation for the accelerated checkouts that we have for swift so added some documentation here too

3.8.0 brings two improvements to Accelerated Checkouts

1. adds support for applePayStyle closing: Possibility to add custom styling to Apple Pay button #443

Simulator.Screen.Recording.-.iPhone.16e.-.2026-04-16.at.15.59.07.mov

2. Updates the Storefront API for Accelerated Checkouts up to 2026-04

From the Swift PR Shopify/checkout-sheet-kit-swift#555:

Bump apiVersion to 2026-04
Add explicit handling for MERCHANDISE_LINE_TRANSFORMERS_RUN_ERROR error code (new in 2026-04) in both CartErrorCode and CartCompletionErrorCode — interrupts with .other reason to fall through to web checkout, matching portable-wallets behavior
Add GIFT_CARD_RECIPIENT_INVALID error code (new in 2026-01) to CartErrorCode — interrupts with .unhandled as gift cards are not applicable in the Apple Pay flow
No breaking changes affect the kit between 2025-10 and 2026-04.

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PR Checklist

Important

• I've added tests to support my implementation
• I have read and agree with the Contribution Guidelines.
• I have read and agree with the Code of Conduct.
• I've updated the README.

Releasing a new version of the kit?

• I have bumped the version number in the package.json file.

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Tip

See the Contributing documentation for instructions on how to publish a new version of the library.

[kieran-osgood-shopify]

• Release 3.8.0: applePayStyle + Accelerated Checkouts StoreFront API 2026-04 #464 👈 (View in Graphite)
• feat: bump ShopifyCheckoutSheetKit dependency to 3.7.0 #463
• main

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