export function base64UrlEncode(input: string | Buffer): string {
  return Buffer.from(input)
    .toString("base64")
    .replace(/=/g, "")
    .replace(/\+/g, "-")
    .replace(/\//g, "_");
}

export function base64UrlDecode(input: string): string {
  input = input.replace(/-/g, "+").replace(/_/g, "/");
  const pad = input.length % 4;
  if (pad) input += "=".repeat(4 - pad);
  return Buffer.from(input, "base64").toString("utf8");
}