# ING Lease Now

This option is available when the ING Lease Now service is enabled. 
The basic request creating the payment must be accompanied by a `cart` object with an `items` array containing the following parameters:

| Parameter | Type | Required parameter | Description |
|-------------------|-----------------------------------------------|-|-|
| `id` | string | `YES` | Product identifier |
| `name` | string | `YES` | Name of the product |
| `amount` | integer | `YES` | Unit value of the net product in the smallest unit of currency - **pennies**. The value `0` is also allowed. |
| `tax` | integer | `YES` | Tax unit value|
| `taxStake` | string | `YES` | Tax rate. **Available values**: `23`, `22`, `8`, `7`, `5`, `3`, `0`, `TAX_EXEMPT`, `TAX_NOT_LIABLE`, `TAX_REVERSE_CHARGE`, `TAX_EXCLUDING` |
| `quantity` | integer | `YES` | Quantity. **Minimum value is 0** |
| `url` | string | `YES` | The url for the product in question |
| `categoryId` | string | `YES` | Category identifier |
| `unit` | string | `NO` | unit |
| `state` | integer | `NO` | Product state. **available values**: `NEW`, `USED` |
| `discount.amount` | integer | `NO` | Value of discount |
| `discount.tax` | integer | `NO` | Discount tax value |

The minimum value for a single product in Leasing is PLN 1,000, while the value of the entire basket must be at least PLN 5,000. The amounts given are **net** amounts.

## Example data structure

```php
$cart = [
    'items' => [
        [
            'id'         => 1,
            'categoryId' => 'category123',
            'name'       => 'Product name',
            'amount'     => 1000,
            'tax'        => 230,
            'taxStake'   => 23,
            'quantity'   => 1,
            'unit'       => 'szt',
            'url'        => 'https://product.url',
            'state'      => 'NEW',
            'discount'   => [
                'amount' => 100,
                'tax'    => 23,
            ]
        ]
    ]
];
```

The above parameters should be taken into account when calculating the signature in accordance with the section [Authorisation](#topic-authorisation).

## Preparing the cart object

### Using the PHP function
The data collected from the above parameters should be encoded using the function:

```
base64_encode(gzencode(json_encode($cart), 5));
``` 

where:

`$cart` - previously prepared parameters

```php
$cart = [
    'items' => [
        [
            'id'         => 1,
            'categoryId' => 'category123',
            'name'       => 'Product name',
            'amount'     => 500000,
            'tax'        => 115000,
            'taxStake'   => 23,
            'quantity'   => 1,
            'unit'       => 'szt',
            'url'        => 'https://product.url',
            'state'      => 'NEW',
            'discount'   => [
                'amount' => 100,
                'tax'    => 23,
            ],
        ],
    ],
];
$cart = base64_encode(gzencode(json_encode($cart), 5));

$fields = [
    'serviceId' => '63f574ed-d90d-4abe-9cs1-39117584a7b7',
    'merchantId' => '6yt3gjtm9p1odfgx8491',
    'amount' => '615000',
    'currency' => 'PLN',
    'orderId' => '123',
    'orderDescription' => '#Example transaction',
    'customerFirstName' => 'Jan',
    'customerLastName' => 'Kowalski',
    'customerEmail' => 'jan.kowalski@example.com',
    'customerPhone' => '515515515',
    'urlSuccess' => 'https://your-shop.com/success',
    'urlFailure' => 'https://your-shop.com/failure',
    'urlReturn' => 'https://your-shop.com/return',
    'cart' => $cart,
];
$serviceKey = 'eAyhFLuHgwl5hu-32GM8QVlCVMWRU0dGjH1c';
$hashMethod = 'sha256';
$signature = createSignature(
    $fields,
    $serviceKey,
    $hashMethod
) . ';' . $hashMethod;
```
Using the additional parameter `visibleMethod` with the value `lease` will display only Leasing on the gateway. This allows you to extract a given method as a separate item in the summary.

## Example form content

```html
<input type="hidden" value="63f574ed-d90d-4abe-9cs1-39117584a7b7" name="serviceId">
<input type="hidden" value="6yt3gjtm9p1odfgx8491" name="merchantId">
<input type="hidden" value="300" name="amount">
<input type="hidden" value="PLN" name="currency">
<input type="hidden" value="123" name="orderId">
<input type="hidden" value="Example transaction" name="orderDescription">
<input type="hidden" value="John" name="customerFirstName">
<input type="hidden" value="Doe" name="customerLastName">
<input type="hidden" value="johndoe@domain.com" name="customerEmail">
<input type="hidden" value="501501501" name="customerPhone">
<input type="hidden" value="https://your-shop.com/success" name="urlSuccess">
<input type="hidden" value="https://your-shop.com/failure" name="urlFailure">
<input type="hidden" value="https://your-shop.com/return" name="urlReturn">
<input type="hidden" value="<?= $cart ?>" name="cart">
```