/** @module @twilio-labs/serverless-api/dist/api */
import { TwilioServerlessApiClient } from '../client';
import { EnvironmentVariables, VariableResource } from '../types';
/**
 * Lists all variables for a given environment
 *
 * @export
 * @param {string} environmentSid the environment to get the variables for
 * @param {string} serviceSid the service the environment belongs to
 * @param {TwilioServerlessApiClient} client API client
 * @returns {Promise<VariableResource[]>}
 */
export declare function listVariablesForEnvironment(environmentSid: string, serviceSid: string, client: TwilioServerlessApiClient): Promise<VariableResource[]>;
/**
 * Sets or updates the values passed in an object of environment variables for a specfic environment
 *
 * @export
 * @param {EnvironmentVariables} envVariables the object of variables
 * @param {string} environmentSid the environment the varibales should be set for
 * @param {string} serviceSid the service the environment belongs to
 * @param {TwilioServerlessApiClient} client API client
 * @param {boolean} [removeRedundantOnes=false] whether to remove variables that are not passed but are currently set
 * @returns {Promise<void>}
 */
export declare function setEnvironmentVariables(envVariables: EnvironmentVariables, environmentSid: string, serviceSid: string, client: TwilioServerlessApiClient, removeRedundantOnes?: boolean): Promise<void>;
/**
 * Deletes a given variable from a given environment
 *
 * @export
 * @param {string} variableSid the SID of the variable to delete
 * @param {string} environmentSid the environment the variable belongs to
 * @param {string} serviceSid the service the environment belongs to
 * @param {TwilioServerlessApiClient} client API client instance
 * @returns {Promise<boolean>}
 */
export declare function deleteEnvironmentVariable(variableSid: string, environmentSid: string, serviceSid: string, client: TwilioServerlessApiClient): Promise<boolean>;
/**
 * Deletes all variables matching the passed keys from an environment
 *
 * @export
 * @param {string[]} keys the keys of the variables to delete
 * @param {string} environmentSid the environment the variables belong to
 * @param {string} serviceSid the service the environment belongs to
 * @param {TwilioServerlessApiClient} client API client instance
 * @returns {Promise<boolean>}
 */
export declare function removeEnvironmentVariables(keys: string[], environmentSid: string, serviceSid: string, client: TwilioServerlessApiClient): Promise<boolean>;