curl -X POST "${BASE_URL}/api/v2/trans/cancelDirectPay" \
  -H "Authorization: Bearer ${ACCESS_TOKEN}" \
  -H "Accept: application/json" \
  -H "Content-Type: application/json" \
  --data-raw '{
  "merchant_id": "48290713",
  "merchant_order_no": [
    "BB-20300101-005",
    "BB-20300101-0099"
  ]
}'

import json
import os
import urllib.parse
import urllib.request

base_url = os.environ["BASE_URL"].rstrip("/")
url = base_url + "/api/v2/trans/cancelDirectPay"
headers = {"Accept": "application/json"}
headers["Authorization"] = "Bearer " + os.environ["ACCESS_TOKEN"]
payload = json.loads(r'''{
  "merchant_id": "48290713",
  "merchant_order_no": [
    "BB-20300101-005",
    "BB-20300101-0099"
  ]
}''')
body = json.dumps(payload).encode("utf-8")
headers["Content-Type"] = "application/json"

request = urllib.request.Request(url, data=body, headers=headers, method="POST")
with urllib.request.urlopen(request, timeout=30) as response:
    print(response.read().decode("utf-8"))

const env = (name) => {
  const value = process.env[name];
  if (!value) throw new Error(`Missing environment variable: ${name}`);
  return value;
};
const baseUrl = env("BASE_URL").replace(/\/+$/, "");
const url = new URL(baseUrl + "/api/v2/trans/cancelDirectPay");
const headers = { Accept: "application/json" };
headers.Authorization = `Bearer ${env("ACCESS_TOKEN")}`;
const payload = {
  "merchant_id": "48290713",
  "merchant_order_no": [
    "BB-20300101-005",
    "BB-20300101-0099"
  ]
};
const body = JSON.stringify(payload);
headers["Content-Type"] = "application/json";

const response = await fetch(url, {
  method: "POST",
  headers,
  body,
  signal: AbortSignal.timeout(30_000),
});
console.log(await response.text());

<?php
$env = static function (string $name): string {
    $value = getenv($name);
    if ($value === false || $value === '') {
        throw new RuntimeException("Missing environment variable: " . $name);
    }
    return $value;
};
$baseUrl = rtrim($env('BASE_URL'), '/');
$url = $baseUrl . "/api/v2/trans/cancelDirectPay";
$headers = ['Accept: application/json'];
$headers[] = 'Authorization: Bearer ' . $env('ACCESS_TOKEN');
$body = <<<'JSON'
{
  "merchant_id": "48290713",
  "merchant_order_no": [
    "BB-20300101-005",
    "BB-20300101-0099"
  ]
}
JSON;
$headers[] = 'Content-Type: application/json';

$curl = curl_init($url);
curl_setopt_array($curl, [
    CURLOPT_CUSTOMREQUEST => "POST",
    CURLOPT_HTTPHEADER => $headers,
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_TIMEOUT => 30,
    CURLOPT_POSTFIELDS => $body,
]);
$response = curl_exec($curl);
if ($response === false) {
    $error = curl_error($curl);
    curl_close($curl);
    throw new RuntimeException($error);
}
curl_close($curl);
echo $response, PHP_EOL;

package main

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

func mustEnv(name string) string {
    value := os.Getenv(name)
    if value == "" { panic("Missing environment variable: " + name) }
    return value
}

func main() {
    baseURL := strings.TrimRight(mustEnv("BASE_URL"), "/")
    endpoint := baseURL + "/api/v2/trans/cancelDirectPay"
    payload := `{
  "merchant_id": "48290713",
  "merchant_order_no": [
    "BB-20300101-005",
    "BB-20300101-0099"
  ]
}`
    body := strings.NewReader(payload)
    req, err := http.NewRequest("POST", endpoint, body)
    if err != nil { panic(err) }
    req.Header.Set("Accept", "application/json")
    req.Header.Set("Authorization", "Bearer " + mustEnv("ACCESS_TOKEN"))
    req.Header.Set("Content-Type", "application/json")
    client := &http.Client{Timeout: 30 * time.Second}
    response, err := client.Do(req)
    if err != nil { panic(err) }
    defer response.Body.Close()
    result, err := io.ReadAll(response.Body)
    if err != nil { panic(err) }
    fmt.Println(string(result))
}

import java.io.ByteArrayOutputStream;
import java.net.URI;
import java.net.URLEncoder;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Path;
import java.time.Duration;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.UUID;
import java.util.stream.Collectors;

public class Example {
    static String requireEnv(String name) {
        String value = System.getenv(name);
        if (value == null || value.isEmpty()) {
            throw new IllegalArgumentException("Missing environment variable: " + name);
        }
        return value;
    }

    public static void main(String[] args) throws Exception {
        String baseUrl = requireEnv("BASE_URL").replaceAll("/+$", "");
        String endpoint = baseUrl + "/api/v2/trans/cancelDirectPay";
        String payload =
            "{\n" +
            "  \"merchant_id\": \"48290713\",\n" +
            "  \"merchant_order_no\": [\n" +
            "    \"BB-20300101-005\",\n" +
            "    \"BB-20300101-0099\"\n" +
            "  ]\n" +
            "}";
        HttpRequest.Builder builder = HttpRequest.newBuilder(URI.create(endpoint))
            .timeout(Duration.ofSeconds(30))
            .header("Accept", "application/json");
        builder.header("Authorization", "Bearer " + requireEnv("ACCESS_TOKEN"));
        builder.header("Content-Type", "application/json");
        HttpRequest request = builder.method("POST", HttpRequest.BodyPublishers.ofString(payload, StandardCharsets.UTF_8)).build();
        HttpClient client = HttpClient.newBuilder().connectTimeout(Duration.ofSeconds(30)).build();
        HttpResponse<String> response = client.send(request,
            HttpResponse.BodyHandlers.ofString(StandardCharsets.UTF_8));
        System.out.println(response.body());
    }
}

require "net/http"
require "uri"

base_url = ENV.fetch("BASE_URL").sub(%r{/+$}, "")
uri = URI(base_url + "/api/v2/trans/cancelDirectPay")
request = Net::HTTP::Post.new(uri)
request["Accept"] = "application/json"
request["Authorization"] = "Bearer " + ENV.fetch("ACCESS_TOKEN")
request["Content-Type"] = "application/json"
request.body = <<~'JSON'
{
  "merchant_id": "48290713",
  "merchant_order_no": [
    "BB-20300101-005",
    "BB-20300101-0099"
  ]
}
JSON
http = Net::HTTP.new(uri.host, uri.port)
http.use_ssl = uri.scheme == "https"
http.open_timeout = 30
http.read_timeout = 30
puts http.request(request).body