> For the complete documentation index, see [llms.txt](https://help.inveterate.com/help-center/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.inveterate.com/help-center/advanced-guides/shopify-scripts/member-only-pricing.md).

# Member Only Pricing

{% hint style="warning" %}
Shopify Plus Only
{% endhint %}

{% hint style="danger" %}
This is an advanced guide meant for developers that not is supported by the Inveterate team. You should ensure you have the appropriate development resources to implement before proceeding. 
{% endhint %}

{% hint style="warning" %}
Only one line item script can be active at a time. If you already have a line item script running and you want to run this script in tandem, this will not work. You'll need to customize the scripts to work together.
{% endhint %}

## Editable Values

* `MESSAGE` - `{string}` A message that will be displayed on every discounted product in checkout.
* `DISCOUNT_PERCENTAGE` - `{number}` The percentage amount each line item will be discounted.
* `PRODUCT_ID_LIST` - `{array[number]}` An array of product IDs for products that should be discounted. If left empty discount will apply to all products.

## Script

```ruby
# Editable Values
MESSAGE = 'Member only pricing!'
DISCOUNT_PERCENTAGE = XX
PRODUCT_ID_LIST = []

########
# DO NOT EDIT PAST THIS POINT
########

class MemberOnlyPricing 
  def initialize()
    @message = MESSAGE
    @percentage_off = (100 - DISCOUNT_PERCENTAGE) * 0.01
    @product_id_list = PRODUCT_ID_LIST
  end

  def run(cart)
    @cart = cart
    start
  end

  private

  def start
    return unless @cart.customer
    return unless @cart.customer.tags.include? "inveterate-subscriber"

    @cart.line_items.each do |line_item|
      if @product_id_list.size > 0
        unless @product_id_list.include? line_item.variant.product.id
          next
        end
      end
      line_item.change_line_price(
        line_item.line_price * @percentage_off,
        message: @message
      )
    end
  end
end

CAMPAIGNS = [
  MemberOnlyPricing.new()
]

CAMPAIGNS.each do |campaign|
  campaign.run(Input.cart)
end

Output.cart = Input.cart
```