function getRandomChar(charset: string) {
  const index = Math.floor(Math.random() * charset.length);
  return charset[index] ?? "";
}

function generateRandomString(length: number, charset: string) {
  let result = "";
  for (let i = 0; i < length; i += 1) {
    result += getRandomChar(charset);
  }
  return result;
}