import type { Pool as PgPool } from 'pg';
interface PgConfig {
    host: string;
    port: number;
    user: string;
    password: string;
    database: string;
    connectionLimit: number;
}
/**
 * Create or return the singleton pg Pool.
 */
export declare function getPool(pgConfig: PgConfig, extensions?: string[]): Promise<PgPool>;
export declare function closePool(): Promise<void>;
export {};