Shopify Extension only App

This app contains 2 functions:

• disable-payment-for-flagged-customers
• spend-x-get-product-y-for-z-discount

Let's discuss the details of each below:

disable-payment-for-flagged-customers

This function uses the Payment Customization API, which is responsible for hiding payment methods for customers who have the tag "flagged".

spend-x-get-product-y-for-z-discount

This function uses the Discount API to apply product-level discounts. It implements a "spend X, get product Y for Z discount" type of promotion. The function retrieves its configuration from shop metafields, including:

• Threshold amount
• Discounted products list
• Discount type
• Discount amount
• Discount message

In short, this function makes the promotion product free when the cart value exceeds $499. (These values can be configured through metafields.)

Here are the definitions of the metafields.

shop {
  metafield(namespace: "global", key: "promo_discount_threshold") {
    value
  }
  metafield(namespace: "global", key: "promo_discount_products") {
    jsonValue
  }
  metafield(namespace: "global", key: "promo_discount_type") {
    value
  }
  metafield(namespace: "global", key: "promo_discount_amount") {
    value
  }
  metafield(namespace: "global", key: "promo_discount_message") {
    value
  }
}

Now let’s explain what each metafield does:

promo_discount_threshold

This is the threshold. When this threshold is exceeded, the function is triggered. For example, if set to 499, the promotion applies when the cart total is greater than $499.

promo_discount_products

This contains a list of product IDs that will receive the discount. You can specify one or multiple products.

promo_discount_type

Accepts two values: "Percentage" or "Dollar".

• If "Percentage", the discount is a percentage off.
• If "Dollar", the discount is a fixed amount off.

promo_discount_amount

Specifies the discount amount. This value depends on the promo_discount_type.

• If type is "Percentage" and amount is 100, the product is free.
• If type is "Dollar" and amount is 5, $5 will be discounted.

promo_discount_message

This is the label or message of the discount, which will be shown on the storefront.