import { Pool, PoolOptions } from "mysql2";
import { SessionStore } from "./types";
interface NewPoolOpts {
    host?: string | undefined;
    port?: number | undefined;
    database?: string | undefined;
    user?: string | undefined;
    password?: string;
    /**
     * MySQL2 Pool options.
     *
     * Remember to install the db driver `'mysql2'`.
     *
     * @see {@link https://github.com/sidorares/node-mysql2#using-connection-pools Node MySQL 2 | Using connection pools}
     * */
    config?: Omit<PoolOptions, "host" | "port" | "database" | "user" | "password">;
    /** Table name to use for sessions. Defaults to "telegraf-sessions". */
    table?: string;
    /** Called on fatal connection or setup errors */
    onInitError?: (err: unknown) => void;
}
interface ExistingPoolOpts {
    /** If passed, we'll reuse this instance of MySQL2 Pool instead of creating our own. */
    pool: Pool;
    /** Table name to use for sessions. Defaults to "telegraf-sessions". */
    table?: string;
    /** Called on fatal connection or setup errors */
    onInitError?: (err: unknown) => void;
}
/** @unstable */
export declare function MySQL<Session>(opts: NewPoolOpts): SessionStore<Session>;
export declare function MySQL<Session>(opts: ExistingPoolOpts): SessionStore<Session>;
export {};