import { type UnixDateTimeMillisecondsNumber } from '../date/date';
/**
 * String representation of data that is stored.
 */
export type StoredDataString = string;
/**
 * Key used for accessing stored data.
 */
export type StoredDataStorageKey = string;
/**
 * Interface for data that has been stored, including metadata about its storage time.
 */
export interface StoredData {
    /**
     * The Unix timestamp (in milliseconds) when the data was stored.
     * Undefined if the storage time is not known or not applicable.
     */
    readonly storedAt: UnixDateTimeMillisecondsNumber | undefined;
    /**
     * The actual data stored, as a string.
     */
    readonly data: StoredDataString;
}
/**
 * Interface for retrieved stored data that has been processed.
 * Extends StoredData with information about expiration and the converted data form.
 *
 * @template T The type of the converted data.
 */
export interface ReadStoredData<T> extends StoredData {
    /**
     * Whether the stored data is considered expired.
     */
    readonly expired: boolean;
    /**
     * The data after being converted from its string representation to type T.
     */
    readonly convertedData: T;
}