Can one create a payment module using Shopify API https://docs.shopify.com/api | Qlickview Application ? Can "Shopify app" also be a payment gateway module?
I understand Shopify develop and host any payment gateway module themself, but it seems one could create their own module?
But these hosted modules from Shopify are not updated.
So why can't a third party payment gateway provider can create their own payment module as a Shopify app. Is that possible using the Shopify API?
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