import { KeyManagementServiceClient } from "@google-cloud/kms";
import { DeepPartial, Service, ServiceParameters } from "@webda/core";
/**
 * Parameters for the KMS Service
 */
export declare class KMSServiceParameters extends ServiceParameters {
    /**
     * Encryption key to use by default
     * @default WEBDA_GCP_KMS_KEY env variable
     */
    defaultKey?: string;
    constructor(params: any);
}
/**
 * Expose KMS Service
 *
 * @WebdaModda GoogleCloudKMS
 */
export declare class GCPKMSService<T extends KMSServiceParameters> extends Service<T> {
    client: KeyManagementServiceClient;
    /**
     * @override
     */
    loadParameters(params: DeepPartial<ServiceParameters>): ServiceParameters;
    /**
     * Encrypt a data with GCP KMS given key or defaultKey
     * @param data
     * @param key
     * @returns
     */
    encrypt(data: string, key?: string): Promise<string>;
    /**
     * Decrypt a data previously encrypted with this service
     * @param data
     * @returns
     */
    decrypt(data: string): Promise<string>;
}