import { STAGE, CoreKmsService, CoreConfigService } from './../core-services';
export declare type ConfigService = CoreConfigService;
/**
 * filter function()
 */
export interface Filter<T> {
    (name: string, val: any, thiz?: any, attr?: string | number): T;
}
/**
 * marshaler: convert object to dotted list.
 *
 * @param obj   json object
 * @param name  current name
 * @param list  result list
 * @param filter filter function.
 */
export declare const marshal: <T>(obj: any, filter: Filter<T>, name?: string, list?: T[], thiz?: any, attr?: string | number) => T[];
/**
 * class: `MyConfigService`
 * - sample for asynchronized factory.
 */
export declare class MyConfigService implements ConfigService {
    /**
     * internal cached config settings.
     */
    protected envConfig: {
        [key: string]: string;
    };
    protected $env: any;
    protected base: any;
    kms: CoreKmsService;
    /**
     * DO NOT craete directly. (use async `ConfigService.factory()`)
     */
    constructor(base?: object, kms?: CoreKmsService);
    /**
     * hello
     */
    hello: () => string;
    /**
     * read all configuration setting
     */
    all(): {
        [key: string]: string;
    };
    /**
     * read config value (or all config settings)
     * 1. read via internal cache.
     * 2. if missed, then read via process.env.
     *
     * @param key       config-name.
     */
    get(key: string): string;
    private _package;
    private loadPackage;
    getService(): string;
    getVersion(): string;
    /**
     * read current stage condition
     */
    getStage(): STAGE;
    /**
     * load & decrypt the environ.
     * - only if string starts with '*'
     */
    init(): Promise<ConfigService>;
}