## The Session object

The Session object is a view of the [Checkout Session](https://docs.stripe.com/api/checkout/sessions/object.md) API object and represents your customer's session on your checkout page. Because data can change over the lifecycle of a session, avoid storing a reference to the Session object. Instead, call `session()` to retrieve the current value and listen to the [change event](https://docs.stripe.com/js/custom_checkout/change_event.md) to subscribe to updates.

- `id`
The ID of the Checkout Session.
- `billingAddress`
Billing details of the Customer.
    - `name`
    Full name.
    - `address`
    Address.
    - `country`
    Two-letter country code ([ISO 3166-1 alpha-2](https://en.wikipedia.org/wiki/ISO_3166-1_alpha-2)).
    - `line1`
    Address line 1 (e.g., street, PO Box, or company name).
    - `line2`
    Address line 2 (e.g., apartment, suite, unit, or building).
    - `city`
    City, district, suburb, town, or village.
    - `postal_code`
    ZIP or postal code.
    - `state`
    State, county, province, or region.
- `businessName`
The business name as configured in the Business Public Details settings of your Stripe account.
- `canConfirm`
Whether the Checkout Session has collected enough data to confirm. Use this field to indicate to your customer if they can proceed, such as disabling the pay button.
- `currency`
Three-letter [ISO currency code](https://www.iso.org/iso-4217-currency-codes.html), in lowercase. Must be a [supported currency](https://docs.stripe.com/currencies.md).
- `currencyOptions`
The currency options available on the Checkout Session when using [Adaptive Pricing](https://docs.stripe.com/checkout/custom-checkout/adaptive-pricing.md).
    - `amount`
    A formatted string representing the total amount in the source currency, including currency symbols.
    - `minorUnitsAmount`
    An integer representing the total amount in the source currency in the [smallest currency unit](https://docs.stripe.com/currencies.md#zero-decimal) (e.g., 100 cents to charge $1.00 or 100 to charge ¥100, a zero-decimal currency).
    - `currency`
    Three-letter [ISO currency code](https://www.iso.org/iso-4217-currency-codes.html), in lowercase.
    - `currencyConversion`
    Currency conversion details. This is only present for the customer currency.
    - `fxRate`
    The exchange rate used to convert source currency amounts to customer currency amounts.
    - `sourceCurrency`
    The creation currency of the Checkout Session before localization.
- `discountAmounts`
The aggregate amounts calculated per discount for