// lib/jwt.ts
export function jwtExp(token?: string | null): number | null {
    if (!token) return null;
    try {
        const payload = JSON.parse(Buffer.from(token.split(".")[1], "base64").toString("utf8"));
        return typeof payload?.exp === "number" ? payload.exp : null;
    } catch {
        return null;
    }
}

export function isJwtValid(token?: string | null): boolean {
    const exp = jwtExp(token);
    return !!exp && exp * 1000 > Date.now();
}