result = gateway.transaction.sale(
    {
        amount: "10.00",
        payment_method_nonce: params[:payment_method_nonce],
        device_data: params[:device_data],
        order_id: "Mapped to PayPal Invoice Number",
        options: {
            submit_for_settlement: true,
            paypal: {
                custom_field: "PayPal custom field",
                description: "Description for PayPal email receipt",
            },
        },
        line_items: [{
            quantity: 1,
            name: "name",
            kind: "debit",
            unit_amount: "10.00",
            total_amount: "10.00",
            upc_code: "01234567891",  # new field
            upc_type: "UPC-A",         # new field
            url: "https://example.com", # new field
            image_url: "https://example.com/product1.jpeg" # new field
        }]
    })
    if result.success?
        # Assuming you have a method to create tracking for the transaction
        create_tracking(result.transaction.id)
        "Success ID: #{result.transaction.id}"
    else
        result.message
    end

# Method to create tracking for the transaction

def create_tracking(transaction_id)
    # Your implementation here
end

# Send the package tracking request for the transaction
packageResult = Braintree::Transaction.package_tracking(
    transactionId,  # Create a Package Tracking request with optional line items
    {
        carrier: "UPS",
        notify_payer: true,
        tracking_number: "tracking_number_1",
        line_items: [  # Optionally create line items
            {
                product_code: "ABC 01",
                name: "Product Name",
                quantity: "1",
                description: "Product Description",
                upc_code: "01234567891",  # new field
                upc_type: "UPC-A",         # new field
                url: "https://example.com", # new field
                image_url: "https://example.com/product1.jpeg" # new field
            },
            {
                product_code: "ABC 01",
                name: "Product Name",
                quantity: "1",
                description: "Product Description",
            }
        ],
    }
)

packages = packageResult.transaction.packages;

id = packages[0].id;
tracking_number = packages[0].tracking_number;
carrier = packages[0].carrier;

# The PayPal tracker ID will not be immediately available in response to
# package_tracking(). But it should be there when the merchant does a findTransaction
# request at a later stage.

# Get more details of the individual packages like so,
# replace 0 with the element index
transaction = Braintree::Transaction.find(transactionId);
id = transaction.packages[0].id;
tracking_number = transaction.packages[0].tracking_number;
carrier = transaction.packages[0].carrier;
paypal_tracker_id = transaction.packages[0].paypal_tracker_id;

# The PayPal tracker ID will not be immediately available in response to
# package_tracking(). But should be there when merchant does a findTransaction
# request at a later stage.