Where could I get these parameters from if I using GA4 to log user's purchase events. Answered

Post author
RR l

Hi ,I am using memberstack + stripe in my saas product.  I am using GA4 to log user's purchase events.

1. There is a purchase event in GA4 which needs to be provided with some parameters. But I don't really know where to get the values of these parameters from. just like  "transaction_id" , "coupon","currency","value" .

2. When the user fails to pay for some reason, I want to record a separate event named "payment_failed" ,and use the reason for payment failure as the event parameter. I don't know if stripe or memberstack returns the reason for payment failure? How should I get that value?

Could you help me ? Thanks

gtag("event", "purchase", {
    transaction_id: "T_12345",
    // Sum of (price * quantity) for all items.
    value: 72.05,
    tax: 3.60,
    shipping: 5.99,
    currency: "USD",
    coupon: "SUMMER_SALE",
    items: [
     {
      item_id: "SKU_12345",
      item_name: "Stan and Friends Tee",
      affiliation: "Google Merchandise Store",
      coupon: "SUMMER_FUN",
      discount: 2.22,
      index: 0,
      item_brand: "Google",
      item_category: "Apparel",
      item_category2: "Adult",
      item_category3: "Shirts",
      item_category4: "Crew",
      item_category5: "Short sleeve",
      item_list_id: "related_products",
      item_list_name: "Related Products",
      item_variant: "green",
      location_id: "ChIJIQBpAG2ahYAR_6128GcTUEo",
      price: 10.01,
      quantity: 3
    },
    {
      item_id: "SKU_12346",
      item_name: "Google Grey Women's Tee",
      affiliation: "Google Merchandise Store",
      coupon: "SUMMER_FUN",
      discount: 3.33,
      index: 1,
      item_brand: "Google",
      item_category: "Apparel",
      item_category2: "Adult",
      item_category3: "Shirts",
      item_category4: "Crew",
      item_category5: "Short sleeve",
      item_list_id: "related_products",
      item_list_name: "Related Products",
      item_variant: "gray",
      location_id: "ChIJIQBpAG2ahYAR_6128GcTUEo",
      price: 21.01,
      promotion_id: "P_12345",
      promotion_name: "Summer Sale",
      quantity: 2
    }]
});

https://developers.google.com/analytics/devguides/collection/ga4/reference/events?sjid=3117304471614638126-NC&client_type=gtag#purchase 

 

purchase

This event signifies when one or more items is purchased by a user.

Parameters

 

Name Type Required Example value Description
currency string Yes* USD Currency of the items associated with the event, in 3-letter ISO 4217 format.

Value metrics on the view_item event to not contribute to revenue

* If you set value then currency is required for revenue metrics to be computed accurately.
value number Yes* 30.03 The monetary value of the event.

* Set value to the sum of (price * quantity) for all items in items. Don't include shipping or tax.
* value is typically required for meaningful reporting. If you mark the event as a key event then it's recommended you set value.
* currency is required if you set value.
transaction_id string Yes T_12345 The unique identifier of a transaction.

The transaction_id parameter helps you avoid getting duplicate events for a purchase.
coupon string No SUMMER_FUN The coupon name/code associated with the event.

Event-level and item-level coupon parameters are independent.
shipping number No 3.33 Shipping cost associated with a transaction.
tax number No 1.11 Tax cost associated with a transaction.
items Array<Item> Yes   The items for the event.

Item parameters

 

Name Type Required Example value Description
item_id string Yes* SKU_12345

The ID of the item.

*One of item_id or item_name is required.
item_name string Yes* Stan and Friends Tee

The name of the item.

*One of item_id or item_name is required.
affiliation string No Google Store A product affiliation to designate a supplying company or brick and mortar store location.
Note: `affiliation` is only available at the item-scope.
coupon string No SUMMER_FUN The coupon name/code associated with the item.

Event-level and item-level coupon parameters are independent.
discount number No 2.22

The unit monetary discount value associated with the item.

 

 

 

 

Comments

1 comment

  • Comment author
    Chukwudi Onyekwere
    • Official comment

    Hello, 

    Thank you for reaching out. 

    Memberstack primarily handles user authentication and membership management, while payment processing is typically managed through Stripe. Memberstack does not directly provide transaction details like transaction_id, coupon, currency, or value for purchases, as these are specific to the payment processor (Stripe).

    You will need to retrieve these parameters from Stripe, as Memberstack does not provide this information directly.

    I hope this helps. 

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