const response = await fetch("https://hcaptcha.canhnhat.vn/createTask", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({
    apiKey: "YOUR_API_KEY",
    task: {
      type:       "hcaptcha",
      websiteURL: "https://example.com/login",
      websiteKey: "a9b5fb07-92ee-493a-a4f4-...",
      // rqdata: "eyJ0eXAi..." // chỉ khi trang yêu cầu
    }
  })
});
const { errorId, taskId } = await response.json();

curl -X POST https://hcaptcha.canhnhat.vn/createTask \
  -H "Content-Type: application/json" \
  -d '{
    "apiKey": "YOUR_API_KEY",
    "task": {
      "type":       "hcaptcha",
      "websiteURL": "https://example.com/login",
      "websiteKey": "a9b5fb07-92ee-493a-a4f4-...",
      "rqdata":     "eyJ0eXAi..."
    }
  }'

# Response thành công:
{ "errorId": 0, "taskId": "3f2504e0-4f89-11ef-9454..." }

async function getToken(apiKey, taskId, maxWaitMs = 120000) {
  const url = "https://hcaptcha.canhnhat.vn/getTaskResult";
  const start = Date.now();

  while (Date.now() - start < maxWaitMs) {
    const r = await fetch(url, {
      method: "POST",
      headers: { "Content-Type": "application/json" },
      body: JSON.stringify({ apiKey, taskId })
    });
    const d = await r.json();

    if (d.status === "ready")  return d.solution.token;
    if (d.errorId === 1) throw new Error(d.errorCode); // đã hoàn tiền

    await new Promise(r => setTimeout(r, 3000));
  }
  throw new Error("Timeout");
}

// Sử dụng
const token = await getToken("YOUR_KEY", taskId);
// Gửi: formData.set("h-captcha-response", token);

# Poll thủ công (lặp mỗi 3-5 giây)
curl -X POST https://hcaptcha.canhnhat.vn/getTaskResult \
  -H "Content-Type: application/json" \
  -d '{"apiKey":"YOUR_KEY","taskId":"3f2504e0-..."}'

# 1. Nếu trả về status "processing" → đợi 3-5s rồi thử lại
# 2. Nếu trả về status "ready" → lấy solution.token
# 3. Nếu errorId = 1 → thất bại, credit đã hoàn, thử task mới

# Dùng token:
# Field: h-captcha-response = P1_eyJhbGci...
# Hạn dùng: ~60-90 giây sau khi nhận