// First-party cookie auth: this runs in a signed-in trdrs session, not under an API key.
const res = await fetch('https://app.trdrs.co/api/challenges/enroll', {
  method: 'POST',
  headers: {
    'content-type': 'application/json',
  },
  credentials: 'include',
  body: JSON.stringify({
    "challengeId": "3f8a1c2e-9b47-4d10-a3fe-2c61b7c90d84",
    "size": 50000
  }),
})
const data = await res.json()

curl -X POST 'https://app.trdrs.co/api/challenges/enroll' \
  -b "session=$TRDRS_SESSION" \
  -H 'content-type: application/json' \
  -d '{"challengeId":"3f8a1c2e-9b47-4d10-a3fe-2c61b7c90d84","size":50000}'

import requests

url = "https://app.trdrs.co/api/challenges/enroll"

payload = {
    "challengeId": "3f8a1c2e-9b47-4d10-a3fe-2c61b7c90d84",
    "size": 50000
}
headers = {
    "cookie": "session=",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://app.trdrs.co/api/challenges/enroll",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'challengeId' => '3f8a1c2e-9b47-4d10-a3fe-2c61b7c90d84',
    'size' => 50000
  ]),
  CURLOPT_COOKIE => "session=",
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://app.trdrs.co/api/challenges/enroll"

	payload := strings.NewReader("{\n  \"challengeId\": \"3f8a1c2e-9b47-4d10-a3fe-2c61b7c90d84\",\n  \"size\": 50000\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("cookie", "session=")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://app.trdrs.co/api/challenges/enroll")
  .header("cookie", "session=")
  .header("Content-Type", "application/json")
  .body("{\n  \"challengeId\": \"3f8a1c2e-9b47-4d10-a3fe-2c61b7c90d84\",\n  \"size\": 50000\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://app.trdrs.co/api/challenges/enroll")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["cookie"] = 'session='
request["Content-Type"] = 'application/json'
request.body = "{\n  \"challengeId\": \"3f8a1c2e-9b47-4d10-a3fe-2c61b7c90d84\",\n  \"size\": 50000\n}"

response = http.request(request)
puts response.read_body

{
  "enrollment": {
    "id": "e5c90b1a-7d34-4f6b-8a2e-91c8f0d47a53",
    "challengeId": "3f8a1c2e-9b47-4d10-a3fe-2c61b7c90d84",
    "challengeName": "50K Evaluation",
    "stage": 1,
    "accountNumber": "EVAL-50K-0042",
    "type": "standard",
    "status": "registered",
    "startingBalance": 50000,
    "ddMode": "trailing_max_equity_eod",
    "startsAt": null,
    "endsAt": null,
    "failReason": null,
    "createdAt": 1787058000,
    "progress": {
      "equity": 50000,
      "balance": 50000,
      "dayAnchorEquity": 50000,
      "hwmEquity": 50000,
      "dailyFloor": 48000,
      "totalFloor": 46000,
      "profitTargetLevel": 54000,
      "tradingDays": 0,
      "minTradingDays": 5,
      "openPositions": 0
    }
  }
}

{
  "error": "invalid_instrument"
}

{
  "error": "invalid_instrument"
}

{
  "error": "invalid_instrument"
}

{
  "error": "invalid_instrument"
}

{
  "error": "invalid_instrument"
}