curl --request POST \
  --url https://whitebit.com/api/v4/sub-account/transfer \
  --header 'Content-Type: application/json' \
  --header 'X-TXC-APIKEY: <api-key>' \
  --header 'X-TXC-PAYLOAD: <api-key>' \
  --header 'X-TXC-SIGNATURE: <api-key>' \
  --data '
{
  "id": "8e667b4a-0b71-4988-8af5-9474dbfaeb51",
  "direction": "main_to_sub",
  "amount": "0.5",
  "ticker": "ETH"
}
'

import requests

url = "https://whitebit.com/api/v4/sub-account/transfer"

payload = {
    "id": "8e667b4a-0b71-4988-8af5-9474dbfaeb51",
    "direction": "main_to_sub",
    "amount": "0.5",
    "ticker": "ETH"
}
headers = {
    "X-TXC-APIKEY": "<api-key>",
    "X-TXC-PAYLOAD": "<api-key>",
    "X-TXC-SIGNATURE": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {
    'X-TXC-APIKEY': '<api-key>',
    'X-TXC-PAYLOAD': '<api-key>',
    'X-TXC-SIGNATURE': '<api-key>',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    id: '8e667b4a-0b71-4988-8af5-9474dbfaeb51',
    direction: 'main_to_sub',
    amount: '0.5',
    ticker: 'ETH'
  })
};

fetch('https://whitebit.com/api/v4/sub-account/transfer', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://whitebit.com/api/v4/sub-account/transfer",
  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([
    'id' => '8e667b4a-0b71-4988-8af5-9474dbfaeb51',
    'direction' => 'main_to_sub',
    'amount' => '0.5',
    'ticker' => 'ETH'
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "X-TXC-APIKEY: <api-key>",
    "X-TXC-PAYLOAD: <api-key>",
    "X-TXC-SIGNATURE: <api-key>"
  ],
]);

$response = curl_exec($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://whitebit.com/api/v4/sub-account/transfer"

	payload := strings.NewReader("{\n  \"id\": \"8e667b4a-0b71-4988-8af5-9474dbfaeb51\",\n  \"direction\": \"main_to_sub\",\n  \"amount\": \"0.5\",\n  \"ticker\": \"ETH\"\n}")

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

	req.Header.Add("X-TXC-APIKEY", "<api-key>")
	req.Header.Add("X-TXC-PAYLOAD", "<api-key>")
	req.Header.Add("X-TXC-SIGNATURE", "<api-key>")
	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://whitebit.com/api/v4/sub-account/transfer")
  .header("X-TXC-APIKEY", "<api-key>")
  .header("X-TXC-PAYLOAD", "<api-key>")
  .header("X-TXC-SIGNATURE", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"id\": \"8e667b4a-0b71-4988-8af5-9474dbfaeb51\",\n  \"direction\": \"main_to_sub\",\n  \"amount\": \"0.5\",\n  \"ticker\": \"ETH\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://whitebit.com/api/v4/sub-account/transfer")

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

request = Net::HTTP::Post.new(url)
request["X-TXC-APIKEY"] = '<api-key>'
request["X-TXC-PAYLOAD"] = '<api-key>'
request["X-TXC-SIGNATURE"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"id\": \"8e667b4a-0b71-4988-8af5-9474dbfaeb51\",\n  \"direction\": \"main_to_sub\",\n  \"amount\": \"0.5\",\n  \"ticker\": \"ETH\"\n}"

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

{
  "transaction_id": "<string>"
}

{
  "code": 123,
  "message": "<string>",
  "errors": {}
}