## API Reference - Cancel Payment

### cURL Example

```bash
curl --request POST \
  --url https://api.pay.walletconnect.com/v1/payments/{id}/cancel \
  --header 'Api-Key: <api-key>' \
  --header 'Merchant-Id: <merchant-id>'
```

### Python Example

```python
import requests

url = "https://api.pay.walletconnect.com/v1/payments/{id}/cancel"

headers = {
    "Api-Key": "<api-key>",
    "Merchant-Id": "<merchant-id>"
}

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

print(response.text)
```

### JavaScript Example (Fetch API)

```javascript
const options = {
  method: 'POST',
  headers: {'Api-Key': '<api-key>', 'Merchant-Id': '<merchant-id>'}
};

fetch('https://api.pay.walletconnect.com/v1/payments/{id}/cancel', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));
```

### PHP Example

```php
<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.pay.walletconnect.com/v1/payments/{id}/cancel",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_HTTPHEADER => [
    "Api-Key: <api-key>",
    "Merchant-Id: <merchant-id>"
  ],
]);

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

curl_close($curl);

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

### Go Example

```go
package main

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

func main() {

url := "https://api.pay.walletconnect.com/v1/payments/{id}/cancel"

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

req.Header.Add("Api-Key", "<api-key>")
	req.Header.Add("Merchant-Id", "<merchant-id>")

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

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

fmt.Println(string(body))
}
```

### Java Example (Unirest)

```java
HttpResponse<String> response = Unirest.post("https://api.pay.walletconnect.com/v1/payments/{id}/cancel")
  .header("Api-Key", "<api-key>")
  .header("Merchant-Id", "<merchant-id>")
  .asString();
```

### Ruby Example

```ruby
require 'uri'
require 'net/http'

url = URI("https://api.pay.walletconnect.com/v1/payments/{id}/cancel")

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

request = Net::HTTP::Post.new(url)
request["Api-Key"] = '<api-key>'
request["Merchant-Id"] = '<merchant-id>'

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

### Response Codes

- **200:** Payment cancelled successfully
- **400:** Bad request
- **401:** Unauthorized
- **404:** Not found
- **500:** Internal server error

### Example JSON Response

```json
{
  "cancelledAt": "2025-01-14T10:30:00Z",
  "cancelledReason": "cancelled_by_merchant",
  "paymentId": "pay_71a2ecc101KQFN7X7RM3Z9GB4ZGNM17TRB",
  "status": "cancelled"
}
```

### Authorizations

- **Api-Key**  (string, header, required)
  
### Headers

- **Api-Key**  (string, required)
- **Merchant-Id**  (string, required)

### Path Parameters

- **id**  (string, required)  
  Payment ID example: `"pay_7fa2ecc101ARZ3NDEKTSV4RRFFQ69G5FAV"`

### Response Details

- **cancelledAt**  (string, required)
- **cancelledReason**  (string, required)
- **paymentId**  (string, required, Payment ID)
- **status**  (enum<string>, required)  
  Available options: `requires_action`, `processing`, `succeeded`, `failed`, `expired`, `cancelled`.