import { LazyProvider } from '../common/provider.js';
/**
 * Module for managing loading of configuration
 * from various sources, and reloading that
 * configuration periodically - to account for
 * secret rotation, etc.
 */
/**
 * Load the json at the given file
 *
 * @param fileName
 */
export declare function loadJsonFromFile(fileName: string): Promise<any>;
/**
 * Load configuration from a file
 *
 * @param fileName
 * @param ttlSecs
 */
export declare function loadFromFile(fileName: string, ttlSecs: number): LazyProvider<any>;
export declare function loadJsonFromSecret(secretId: string): Promise<any>;
/**
 * Load configuration from a secret
 *
 * @param secretId ARN or name of secret
 * @param ttlSecs rotation period in seconds
 */
export declare function loadFromSecret(secretId: string, ttlSecs: number): LazyProvider<any>;
export interface LoadRule {
    ttlSecs: number;
    type: string;
    value: string;
}
/**
 * Load configuration from the sources specified by the given rule,
 * and combine the results into a single object via
 * Object.assign(this, listOfConfigs)
 *
 * @param rulesIn pulled from process.env["LITTLE_CONFIG"] if not set,
 *   mapping from key to LoadRule that
 *   specifies type of source (currently supports secret, env, string,
 *   or file), ttlSecs, and path - merges with default rule
 *  (homedir + "/.local/share/littleware/authn/config.json")
 * @return Provider that provides mapping from key to loaded data
 */
export declare function loadFromRule(rulesIn?: {
    [key: string]: LoadRule | {
        value: string;
    };
} | string): LazyProvider<{
    [key: string]: any;
}>;