monkeytype/backend/utils/captcha.ts

import fetch from "node-fetch";

interface CaptchaData {
  success: boolean;
  challenge_ts?: number;
  hostname: string;
  "error-codes"?: string[];
}

export async function verify(captcha: string): Promise<boolean> {
  if (process.env.MODE === "dev") {
    return true;
  }
  const response = await fetch(
    `https://www.google.com/recaptcha/api/siteverify`,
    {
      method: "POST",
      headers: { "Content-Type": "application/x-www-form-urlencoded" },
      body: `secret=${process.env.RECAPTCHA_SECRET}&response=${captcha}`,
    }
  );
  const captchaData = (await response.json()) as CaptchaData;
  return captchaData.success;
}