# 1. Version Control

## Version History

<mark style="color:blue;">`GET`</mark> `{{Base Adres}}/api/paywall/payment/version`

{% tabs %}
{% tab title="200: OK Return parameters are as follows." %}
{% code overflow="wrap" lineNumbers="true" %}

```json
{
    "ErrorCode": 0,
    "Result": true,
    "Message": "",
    "Body": "Always fresh, always ahead!"
}
```

{% endcode %}
{% endtab %}
{% endtabs %}

<table><thead><tr><th width="165"> Version </th><th width="134.33333333333331">Date</th><th>Description</th></tr></thead><tbody><tr><td>1.0.0</td><td>11/09/2022</td><td>The method, parameters, and web service address have been changed. Test data has been added.</td></tr></tbody></table>

{% hint style="info" %}
**Important**: In order to use the payment initiation service, you need to send the '**apikeypublic**' and '**apiclientpublic**' parameters in the 'Header' field.\
\
[<mark style="color:green;">**PaymentAPI Ad**</mark>](https://developer.paywall.one/payment-orchestration-integration-document/environment)<mark style="color:green;">**dress**</mark>
{% endhint %}

<table><thead><tr><th width="162">Parameter</th><th width="79">Type</th><th width="136">Compulsory</th><th width="403">Description</th></tr></thead><tbody><tr><td>apikeypublic</td><td>string</td><td>Yes</td><td>The Public Key obtained from the merchant panel.</td></tr><tr><td>apiclientpublic</td><td>string</td><td>Yes</td><td>The Public Client obtained from the merchant panel.</td></tr></tbody></table>

**The parameters that need to be sent to the service are as follows:**

{% hint style="info" %}
You can perform version control of the system. To do this, you can send a request to the system as follows.
{% endhint %}