# Transaction Creation Service

Calling this service is mandatory in the JavaScript payment flow. In addition to the REST payment request parameters, the following field must also be sent:

|Parameter|Description|Format|Mandatory|
|-|-|:-:|:-:|
|`payment_js`|Must be sent with the value `true` to enable the JavaScript payment flow.|<u><</u> 5 A |YES|

In response, the following parameter will be additionally returned:

|Parameter|Description|Format|
|-|-|:-:|
| **payment** |
|`pay_token`|Token related to the JavaScript payment.| = 66 AN

For more details about this call, refer to the [REST Payment.](pagamento-rest-begin.md)

## Example

**Request:**
To use this example, don't forget to define the variable `{{url}}` with the value<br/> **<URLPOSTMAN/>**

```bash
curl 
--request POST "https://{{url}}/e-sitef/api/v1/transactions"
--header "Content-Type: application/json"
--header "merchant_id: xxxxxxxx"
--header "merchant_key: xxxxxxxx"
--data-binary
{
    "merchant_usn":"12042142155",
    "order_id":"12042142155",
    "installments":"1",
    "installment_type":"4",
    "authorizer_id":"2",
    "amount":"1000",
    "payment_js":"true"
}
--verbose
```

**Response:**
```
{
    "code":"0",
    "message":"OK. Transaction successful.",
    "payment":{
        "status":"NOV",
        "nit":"1234567890123456789012345678901234567890123456789012345678901234",
        "order_id":"12042142155",
        "merchant_usn":"12042142155",
        "amount":"1000",
        "pay_token":"123456789012345678901234567890123456789012345678901234567890123456"
    }
}
```

## Payment with Store

If it's desired to store the used card, just send the followings fields:

| Parameter | Description | Format | Mandatory |
| - | - | :-: | :-: |
|`store_card`|Must be sent with the value `true` to enable the JavaScript payment with store flow.|<u><</u> 5 A | NO |
|`additional_data`<br/>`.payer`<br/>`.store_identification`| Identification of the owner of the card to be stored. This field is mandatory if the `store_card` field is sent with the value `true`.| <u><</u> 20 N| COND|

As response, the following parameter will be additionally returned:

| Parameter | Description | Format |
| - | - | :-: |
| **store** |
|`nita`| Store transaction ID. | = 65 AN |

After performing the payment, the card information will be sent to the merchant via [Store Notification](pagamento-html-armazenamento.md#store-notification).