const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({couponCode: 'DISCOUNT2023'})
};

fetch('https://api.gnosispay.com/api/v1/order/{orderId}/attach-coupon', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

curl --request POST \
  --url https://api.gnosispay.com/api/v1/order/{orderId}/attach-coupon \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "couponCode": "DISCOUNT2023"
}
'

import requests

url = "https://api.gnosispay.com/api/v1/order/{orderId}/attach-coupon"

payload = { "couponCode": "DISCOUNT2023" }
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

package main

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

func main() {

	url := "https://api.gnosispay.com/api/v1/order/{orderId}/attach-coupon"

	payload := strings.NewReader("{\n  \"couponCode\": \"DISCOUNT2023\"\n}")

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

	req.Header.Add("Authorization", "Bearer <token>")
	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://api.gnosispay.com/api/v1/order/{orderId}/attach-coupon")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"couponCode\": \"DISCOUNT2023\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.gnosispay.com/api/v1/order/{orderId}/attach-coupon")

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

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"couponCode\": \"DISCOUNT2023\"\n}"

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

{
  "couponCode": "DISCOUNT2023"
}

{
  "message": "<string>"
}

{
  "message": "Card order not found."
}

{
  "message": "Coupon code is invalid."
}

{
  "message": "An unexpected error occurred."
}