> ## Documentation Index
> Fetch the complete documentation index at: https://lago-ftr-wallet-improvements.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Update a coupon

> This endpoint is used to update a coupon that can be then attached to a customer to create a discount.

<RequestExample>
  ```bash cURL
  LAGO_URL="https://api.getlago.com"
  API_KEY="__YOUR_API_KEY__"

  curl --location --request PUT "$LAGO_URL/api/v1/coupons/:code" \
    --header "Authorization: Bearer $API_KEY" \
    --header 'Content-Type: application/json' \
    --data-raw '{
      "coupon": {
        "name": "Startup Deal",
        "code": "startup_deal",
        "amount_cents": 5000,
        "amount_currency": "USD",
        "coupon_type": "fixed_amount",
        "frequency": "recurring",
        "frequency_duration": 6,
        "reusable": true,
        "expiration": "time_limit",
        "expiration_at": "2022-08-08T23:59:59Z"
      }
    }'
  ```

  ```python Python
  from lago_python_client.client import Client
  from lago_python_client.exceptions import LagoApiError
  from lago_python_client.models import Coupon

  client = Client(api_key='__YOUR_API_KEY__')

  update_params = Coupon(name='new name')

  try:
      client.coupons.update(update_params, 'code')
  except LagoApiError as e:
      repair_broken_state(e)  # do something on error or raise your own exception
  ```

  ```ruby Ruby
  require 'lago-ruby-client'

  client = Lago::Api::Client.new({api_key: '__YOUR_API_KEY__'})

  update_params = {name: 'new name'}
  client.coupons.update(update_params, 'code_bm')
  ```

  ```js Javascript
  await client.coupons.updateCoupon("code", { coupon: { name: "new name" } });
  ```

  ```go Go
  import "fmt"
  import "github.com/getlago/lago-go-client"

  func main() {
  lagoClient := lago.New().
      SetApiKey("__YOUR_API_KEY__")

  couponInput := &lago.CouponInput{
      Name:               "Coupon",
          Code:               "coupon",
          AmountCents:        1500,
          AmountCurrency:     lago.EUR,
          Expiration:         lago.CouponExpirationTimeLimit,
          ExpirationAt:       "2022-08-08T23:59:59Z",
  }

  coupon := lagoClient.Coupon().Update(couponInput)
  if err != nil {
      // Error is *lago.Error
      panic(err)
  }

  // coupon is *lago.Coupon
  fmt.Println(coupon)
  }
  ```

  ```csharp C#
  using System.Collections.Generic;
  using System.Diagnostics;
  using Org.OpenAPITools.Api;
  using Org.OpenAPITools.Client;
  using Org.OpenAPITools.Model;

  namespace Example
  {
    public class UpdateCouponExample
    {
        public static void Main()
        {
            Configuration.Default.BasePath = "https://api.getlago.com/api/v1";
            // Configure HTTP bearer authorization: bearerAuth
            Configuration.Default.AccessToken = "YOUR_ACCESS_TOKEN";

            var apiInstance = new CouponsApi(Configuration.Default);
            var code = "example_code";  // string | Code of the existing coupon
            var couponInput = new CouponInput(); // CouponInput | Update an existing coupon

            try
            {
                // Update an existing coupon
                Coupon result = apiInstance.UpdateCoupon(code, couponInput);
                Debug.WriteLine(result);
            }
            catch (ApiException e)
            {
                Debug.Print("Exception when calling CouponsApi.UpdateCoupon: " + e.Message );
                Debug.Print("Status Code: "+ e.ErrorCode);
                Debug.Print(e.StackTrace);
            }
        }
    }
  }
  ```

  ```php PHP
  <?php
  require_once(__DIR__ . '/vendor/autoload.php');


  // Configure Bearer authorization: bearerAuth
  $config = OpenAPI\Client\Configuration::getDefaultConfiguration()->setAccessToken('YOUR_ACCESS_TOKEN');


  $apiInstance = new OpenAPI\Client\Api\CouponsApi(
    // If you want use custom http client, pass your client which implements `GuzzleHttp\ClientInterface`.
    // This is optional, `GuzzleHttp\Client` will be used as default.
    new GuzzleHttp\Client(),
    $config
  );
  $code = "example_code"; // string | Code of the existing coupon
  $coupon_input = new \OpenAPI\Client\Model\CouponInput(); // \OpenAPI\Client\Model\CouponInput | Update an existing coupon

  try {
    $result = $apiInstance->updateCoupon($code, $coupon_input);
    print_r($result);
  } catch (Exception $e) {
    echo 'Exception when calling CouponsApi->updateCoupon: ', $e->getMessage(), PHP_EOL;
  }
  ```
</RequestExample>