import { Source } from './Source';
/**
 * This expects to interact with a Lambda service to request secrets and get back an encrypted value
 * where KMS decrypt is needed in order to get the secrets.
 */
export declare class LambdaKMSStore implements Source {
    private readonly secureCache;
    private readonly logger;
    private readonly region;
    private readonly kmsARN;
    private readonly lambdaARN;
    private readonly secrets;
    private readonly keys;
    private readonly lambda;
    private readonly kms;
    private initialized;
    private loading;
    /**
     * This object must be initialized with all the configuration keys you expect to load.
     *
     * @param lambdaARN the full ARN of the lambda that will be invoked to return the secrets.
     * @param kmsARN the full ARN of the KMS used to decrypt the secrets returned.
     * @param secrets a comma separated list of the secret sources to consider.
     * @param keys all of the keys that you want to retrieve from the configuration source later.
     */
    constructor(lambdaARN: string, kmsARN: string, secrets: string, ...keys: string[]);
    /**
     * Invoke the lambda function and retrieve all the requested config keys.
     */
    refresh(): Promise<void>;
    get(name: string): Promise<any | undefined>;
}