import { Sequelize, SequelizeOptions } from 'sequelize-typescript';
import { DatabaseConfig } from '@5minds/processcube_engine_sdk';
/**
 * Returns a Sequelize connection and loads all models into it.
 *
 * @returns A ready-to-use Sequelize instance.
 */
export default function setupSequelize(): Promise<Sequelize>;
/**
 * Returns a Sequelize connection for the given configuration, without loading any models.
 *
 * @async
 * @param  config          The config to use.
 * @param  config.host     The name of the host where the database is located.
 * @param  config.port     The port by which to connect to the host.
 * @param  config.dialect  The type of database to which to connect (postgres, sqlite, mysql, etc).
 * @param  config.database The name of the database to connect to.
 * @param  config.username The username with which to connect to the database.
 * @param  config.password The password with which to connect to the database.
 *
 * @returns                 A ready-to-use Sequelize instance.
 */
export declare function getSequelizeInstanceWithoutModels(config: DatabaseConfig | SequelizeOptions): Promise<Sequelize>;
/**
 * Destroys the currently active sequelize instance.
 * @async
 */
export declare function destroySequelizeInstance(): Promise<void>;
/**
 * Returns a boolean whether the given database exists or not.
 *
 * @async
 * @param  config          The config to use.
 * @param  config.host     The name of the host where the database is located.
 * @param  config.port     The port by which to connect to the host.
 * @param  config.dialect  The type of database to which to connect (postgres, sqlite, mysql, etc).
 * @param  config.database The name of the database to connect to.
 * @param  config.username The username with which to connect to the database.
 * @param  config.password The password with which to connect to the database.
 *
 * @return                 A boolean indicating whether the database exists or not.
 */
export declare function databaseExists(config: DatabaseConfig): Promise<boolean>;
export declare function executeWithRetry<TReturnType>(queryFunction: any, infoText: string, retryCounter?: number, currentRetryDuration?: number, dbRequestId?: string, maxTimeoutInMs?: number): Promise<TReturnType>;