import { SecretManagerServiceClient } from "@google-cloud/secret-manager";
/**
 * Options type.
 * @type
 * @public
 */
export type Options = {
    projectId?: string;
};
/**
 * SecretManager is responsible of obtain secret values related to a `projectId`
 * @class
 * @constructor
 * @public
 */
export declare class SecretManager {
    protected options: Options;
    protected manager: SecretManagerServiceClient;
    constructor(options?: Options);
    private getName;
    private getEnvVarSecrets;
    private _get;
    /**
     * Obtains the secret values associated to one or multiple `keys`.
     * If one or more secrets not exists returns undefined for each one.
     *
     * @param {string[]} keys The keys to identify the secrets.
     *
     * @returns {string[]} The values associated to the `keys` or if one or more secrets not exists undefined for each one.
     */
    get(...keys: string[]): Promise<Array<string | undefined>>;
    /**
     * Manage the secrets from environment values. If one or more env vars has is value equal to `@secret`,
     *
     * @returns {boolean} Returns true if secrets are resolved from Google, false if secrets are returned from cache.
     */
    manageSecrets(): Promise<boolean>;
}