# ES Billing Field Subset (v1)

Index: `customer_subscription_v1`

## Root fields
- `app_id`
- `sms_cust_id`

## Nested `orders` fields
- `orders.order_id`
- `orders.sms_order_id`
- `orders.transaction_id`
- `orders.gateway_name`
- `orders.order_status`
- `orders.order_created_at`
- `orders.price`
- `orders.currency`
- `orders.sms_package_id`
- `orders.package_name`

## Nested `orders.subscription` fields (where present)
- `orders.subscription.subscription_status`
- `orders.subscription.subscription_created_at`
- `orders.subscription.subscription_start_date`
- `orders.subscription.subscription_end_date`