# Extend Orders (v2)

The **REST API** **version 2** introduces two key improvements:

* Supports extension via **signed transactions**
* Adds a new resource type: **Bandwidth**

## [Extend API (Postman)](https://www.postman.com/tronsave/tronsave/folder/01yhu2j/extend-order)

## Extend feature flow:

### [**Step 1:** Get extendable delegates](https://docs.tronsave.io/developer/extend-orders-v2/step-1-get-extendable-delegates)

### [**Step 2:** Submit extend request](https://docs.tronsave.io/developer/extend-orders-v2/step-2-extend-request)

Following payment methods:

[**Option 1:** Extend using an **API key**](https://docs.tronsave.io/developer/step-2-extend-request#option-1-extend-order-using-api-key)

[**Option 2:** Extend using a **signed transaction**](https://docs.tronsave.io/developer/step-2-extend-request#option-2-extend-order-using-signed-transaction)

## API List for Testing - TRON Nile Testnet

{% tabs %}
{% tab title="Test\_API" %}

* Get extendable delegates:\
  &#x20;<mark style="color:orange;">`POST`</mark>  `https://api-dev.tronsave.io/v2/get-extendable-delegates`
* Sent extend request:  <mark style="color:orange;">`POST`</mark>  `https://api-dev.tronsave.io/v2/extend-request`
  {% endtab %}
  {% endtabs %}

If you want to integrate with the **Nile Testnet**, simply replace the URL with <https://testnet.tronsave.io/> and follow the same steps as in [the guide](https://docs.tronsave.io/developer/get-api-key/on-the-website).