# API Documentation for Retrieving Invoice Data via API

This section of the documentation outlines how to retrieve information about a specific invoice using Crypto Payments from E-Gates.

#### Retrieving an Invoice

This method allows you to retrieve detailed information about a specific invoice using its unique identifier.

**Request**

URL: `/api/external/v1/gateway/payment-invoice/{invoiceId}` Method: GET

**Parameters:**

* `invoiceId` (string, required) - Unique identifier of the invoice.

**Example Request:**

`GET /api/external/v1/gateway/payment-invoice/2794c4d4-6feb-4b46-9334-1849af7b1a0f`

**Response**

Successful response:

* `success` (boolean) - Indicates whether the request was successful.
* `status` (null) - Response status (may be null).
* `response` (object) - Object containing detailed information about the requested invoice.
  * `id` (string) - Invoice identifier.
  * `invoice` (string) - Unique identifier of the invoice.
  * `ticker` (string) - Cryptocurrency ticker of the invoice.
  * `currencyName` (string) - Name of the invoice currency.
  * `networkName` (string) - Network name (e.g., "ERC-20").
  * `payment_method` (string) - Payment method used for the invoice.
  * `actualAmount` (string) - Actual payment amount received.
  * `invoiceAmount` (string) - Original invoice amount.
  * `amountTransaction` (string) - Amount of the transaction.
  * `feeTransaction` (string) - Transaction fee.
  * `address` (string) - Cryptocurrency address for receiving payment.
  * `sysAddress` (null or string) - System address.
  * `hash` (string) - Transaction hash.
  * `type` (string) - Invoice type (e.g., "CRYPTO").
  * `status` (string) - Invoice status (e.g., "SUCCESS").
  * `sender_name` (string) - Sender's name.
  * `purpose_of_payment` (string) - Purpose of the payment.
  * `order_number` (string) - Order number associated with the invoice.
  * `createdAt` (string) - Date and time when the invoice was created.
  * `updatedAt` (string) - Date and time of the last invoice update.
  * `expireAt` (string) - Date and time when the invoice expires.
  * `redirectContinue` (string) - URL to continue to after a successful payment.

**Example Successful Response:**

```json
{
    "success": true,
    "status": null,
    "response": {
        "id": "1-13",
        "invoice": "2794c4d4-6feb-4b46-9334-1849af7b1a0f",
        "ticker": "USDT",
        "currencyName": "Tether USD",
        "networkName": "ERC-20",
        "payment_method": "ETHER",
        "actualAmount": "100001.000000000000000000",
        "invoiceAmount": "100",
        "amountTransaction": "99000.99000000",
        "feeTransaction": "1000.010000000000000000",
        "address": "0xC1Dc25f17d2d767A103F881dC5c363E9Df3e01D8",
        "sysAddress": null,
        "hash": "test_hash1",
        "type": "CRYPTO",
        "status": "SUCCESS",
        "sender_name": "user name",
        "purpose_of_payment": "payment for items",
        "order_number": "14556-HF1000-KL5",
        "createdAt": "2023-08-11 21:12:00",
        "updatedAt": "2023-08-11 16:11:29",
        "expireAt": "2023-08-12 00:12:00",
        "redirectContinue": "http://test.com/success"
    },
    "errors": null
}
```

Note: In case of errors, the `errors` field will contain relevant information.