/**
 * How long webhook deliveries are kept. Each class is one LIST partition of `WebhookDelivery`, itself
 * RANGE-partitioned on `createdAt` into day or week leaves, and expired leaves are dropped whole. The
 * class is stamped on a delivery when it's written and encoded in its id, so a retention change only
 * applies to new deliveries.
 *
 * `code` is the class char in a v2 delivery id. Append new classes; never reuse or reorder codes.
 */
export type WebhookDeliveryRetentionClass = {
    code: string;
    days: number;
    period: "day" | "week";
};
export declare const WEBHOOK_DELIVERY_RETENTION_CLASSES: readonly WebhookDeliveryRetentionClass[];
/** The class for an exact number of days, if there is one. */
export declare function webhookDeliveryRetentionClass(days: number): WebhookDeliveryRetentionClass | undefined;
/** The smallest class that keeps deliveries at least `days`, or the longest class past that. */
export declare function webhookDeliveryRetentionClassAtLeast(days: number): WebhookDeliveryRetentionClass;
export declare function webhookDeliveryRetentionClassByCode(code: string): WebhookDeliveryRetentionClass | undefined;