If you have single product to pass then you can use the extension in Launch but if you have multiple products then don’t use the extension in Launch.

Use custom code option in Rule of Launch ,sample code is shown below:

for (i = 0; i < digitalData.transaction.item.length; i++)

{

var sku = digitalData.transaction.item[i].productInfo.sku;

var units = digitalData.transaction.item[i].productInfo.units;

var price = digitalData.transaction.item[i].productInfo.checkoutPrice;

var test=test+”;” + sku + “;” + units + “;” + price + “;,”;

}

s.products=test.substring(0,test.length-1);

Do the changes in code as per your requirement.

Product string extensions in Adobe Launch