Afterpay has cartridges that can be used with:
Commerce Cloud’s Storefront Reference Architecture (SFRA)
A controller-based SiteGenesis
Once you have Afterpay on your SFCC hosted website, the following features are present:
Afterpay Messaging on Product, Cart and Category pages
Afterpay as a Payment Method during checkout
Afterpay Express Checkout
During checkout Cash App Pay appears as a payment method alongside Afterpay
Now install the cartridge; follow the instructions on the Install Cartridge page.
After that you should:
Make SiteGenesis code changes.
Do an SFRA files change review.
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