export interface UpdateSubscriptionRequest {
    /**
     * ID of the subscription. String starting with **sub_**.
     */
    subscription: `sub_${string}`;
    /**
     * Determines the method of billing. Set to **pay_automatically**.
     */
    billing?: string;
    /**
     * Resets the start of the next billing cycle to the current day. Value: **now**
     */
    billing_cycle_anchor?: string;
    /**
     * Terminates the subscription at the end of the current billing period.
     */
    cancel_at_period_end?: boolean;
    /**
     * The ID of a discount coupon that applies to all subscription items associated with this subscription.
     */
    coupon?: string;
    /**
     * Number of days between the date of issuance of an invoice and the date payment is due.
     */
    days_until_due?: number;
    /**
     * A JSON object defined by the client.
     */
    metadata?: object;
    /**
     * Object containing fields of the 'payment' object.
     */
    payment_fields?: object;
    /**
     * The percentage of tax that is applied to the entire amount of the invoice or periodic billing statement.
     */
    tax_percent?: number;
    /**
     * The time of the end of the customer's free trial period. If `trial_from_plan` is set, leave this parameter unset.
     */
    trial_end?: number;
    /**
     * Determines whether a free trial period can be defined in a 'plan' object attached to the subscription. If `trial_end` is set, leave this parameter unset. Default is **true**.
     */
    trial_from_plan?: boolean;
    /**
     * The number of days in the customer's free trial period.
     */
    trial_period_days?: number;
}
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