## Upload an external payment receipt

### cURL

```
curl --request POST \
  --url https://payouts.api.trykarat.com/external-payments/{external_payment_id}/receipt \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "base64": "<string>",
  "fileName": "<string>"
}
'
```

### Python

```
import requests

url = "https://payouts.api.trykarat.com/external-payments/{external_payment_id}/receipt"

payload = {
    "base64": "<string>",
    "fileName": "<string>"
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)
```

### JavaScript (Fetch)

```
const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({base64: '<string>', fileName: '<string>'})
};

fetch('https://payouts.api.trykarat.com/external-payments/{external_payment_id}/receipt', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));
```

### PHP

```
<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://payouts.api.trykarat.com/external-payments/{external_payment_id}/receipt",
  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([
    'base64' => '<string>',
    'fileName' => '<string>'
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json"
  ],
]);

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

curl_close($curl);

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

### Go

```
package main

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

func main() {

url := "https://payouts.api.trykarat.com/external-payments/{external_payment_id}/receipt"

payload := strings.NewReader("{\n  \"base64\": \"<string>\",\n  \"fileName\": \"<string>\"\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))
}
```

### Response Codes

- 200: The receipt was uploaded successfully.
- 400: Bad request.
- 401: Unauthorized - Invalid API key.
- 404: Not found - Payment intent not found.

### Example Responses

#### Success Response
```json
{
  "data": {
    "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "receiptFileName": "<string>"
  }
}
```

#### Error Responses
```json
{
  "error": {
    "message": "amount: amount must be positive"
  }
}
```
```json
{
  "error": {
    "message": "Invalid api key"
  }
}
```
```json
{
  "error": {
    "message": "Payment intent not found"
  }
}
```

### Authorizations

#### Authorization
- **Type:** string
- **Location:** header
- **Required:** Yes
- **Description:** Pass your API key as a bearer token: `Authorization: Bearer <API_KEY>`.

### Path Parameters

- **external_payment_id**: string (uuid) - required - The ID of the external payment.

### Request Body

- **base64**: string - required - Base64-encoded receipt file contents.
- **fileName**: string - Optional file name for the receipt.