import { ServiceBase } from '@opra/core';
import { SqbClient, SqbConnection } from '@sqb/connect';
/**
 * @namespace SqbServiceBase
 */
export declare namespace SqbServiceBase {
    interface Options {
        db?: SqbServiceBase['db'];
    }
}
/**
 * @class SqbServiceBase
 * @template T - The data type class type of the resource
 */
export declare class SqbServiceBase extends ServiceBase {
    /**
     * Represents a SqbClient or SqbConnection object
     */
    db?: (SqbClient | SqbConnection) | ((_this: this) => SqbClient | SqbConnection);
    /**
     * Constructs a new instance
     *
     * @param [options] - The options for the service.
     * @constructor
     */
    constructor(options?: SqbServiceBase.Options);
    /**
     * Executes the provided function within a transaction.
     *
     * @param callback - The function to be executed within the transaction.
     */
    withTransaction(callback: (connection: SqbConnection, _this: this) => any): Promise<any>;
    /**
     * Retrieves the database connection.
     *
     * @protected
     *
     * @throws {Error} If the context or database is not set.
     */
    getConnection(): SqbConnection | SqbClient | Promise<SqbConnection | SqbClient>;
}