import pg from 'pg';
import { PostgresTransaction } from './PostgresTransaction.js';
import { Database } from '../../Database.js';
import type { DbConfig } from '../../types.js';
/**
 * Represents a Postgres database connection that extends the Database class.
 * @extends Database<PostgresTransaction>
 */
export declare class PostgresDatabase extends Database<PostgresTransaction> {
    /**
     * A public static property that represents a connection pool for a PostgreSQL database.
     * This property is used to manage and provide connections to the PostgreSQL database.
     */
    private static pgProvider;
    /**
     * Represents a connection pool to manage multiple client connections to the database.
     */
    readonly client: pg.Pool;
    /**
     * A private property that represents a connection pool for clients.
     * @type {Pool | undefined}
     */
    readonly readClient?: pg.Pool;
    /**
     * Constructor for creating a new instance of a database connection using Postgres.
     * @param {DbConfig<'pg'>} config - The configuration object for the Postgres database.
     * @returns None
     */
    constructor(config: DbConfig<'pg'>);
    /**
     * Creates a new Postgres transaction using the provided client and read client.
     * @returns {Promise<PostgresTransaction>} A promise that resolves to a new PostgresTransaction object.
     */
    transaction(): Promise<PostgresTransaction>;
    private providerFactory;
}