import type { StringValue } from "ms";
import type { JWTPayload } from "./types.js";
/**
 * Sign a JWT access token with the given payload and secret.
 */
export declare function signAccessToken(payload: Pick<JWTPayload, "sub" | "login" | "name">, secret: string, expiresIn?: StringValue | number): string;
/**
 * Sign a JWT refresh token with the given payload and secret.
 */
export declare function signRefreshToken(payload: Pick<JWTPayload, "sub" | "login" | "name">, secret: string, expiresIn?: StringValue | number): string;
/**
 * Verify a JWT token and return its decoded payload.
 * Throws if the token is invalid or expired.
 */
export declare function verifyToken(token: string, secret: string): JWTPayload;
/**
 * Refresh an access token using a valid refresh token.
 * Returns a new access token and a new refresh token.
 */
export declare function refreshAccessToken(refreshToken: string, secret: string): {
    accessToken: string;
    refreshToken: string;
};
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