> For the complete documentation index, see [llms.txt](https://docs.tronsave.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.tronsave.io/developers/api-reference/extend-orders/extend-request.md).

# Extend Request

Extend the delegates you selected in [Step 1: Get extendable delegates](/developers/api-reference/extend-orders/get-extendable-delegates.md). Two payment methods are supported:

* **Option 1 — API key:** authorize the extension with a TronSave API key on a prefunded [internal account](/developers/authentication.md); no per-order on-chain signing.
* **Option 2 — Signed transaction:** sign the extension with your own private key and settle it on-chain.

Both options use the same endpoint and return  `orderId` on success.

<mark style="color:orange;">**`POST`**</mark> **`https://api.tronsave.io/v2/extend-request`**

{% hint style="info" %}
Rate limit: **15** requests per **1** second.
{% endhint %}

## Option 1: Extend using an API key

### Headers

<table><thead><tr><th width="140">Name</th><th width="110">Type</th><th>Description</th></tr></thead><tbody><tr><td><code>apikey</code><mark style="color:red;">*</mark></td><td>String</td><td>TronSave API key tied to your internal account. See <a href="/pages/XaTyt4DPLJY85H5LZwQw">Authentication</a> to get your API key.</td></tr></tbody></table>

<mark style="color:red;">\*</mark> <sub>Required.</sub>

### Request body

<table><thead><tr><th width="150">Field</th><th width="120">Type</th><th>Description</th></tr></thead><tbody><tr><td><code>receiver</code><mark style="color:red;">*</mark></td><td>String</td><td>The address that receives the resource.</td></tr><tr><td><code>extendData</code><mark style="color:red;">*</mark></td><td>Array</td><td>Array of extend data. Use the response from the estimate API — see Get extendable delegates.</td></tr><tr><td><code>resourceType</code></td><td>String</td><td><code>"ENERGY"</code> or <code>"BANDWIDTH"</code>. Default: <code>"ENERGY"</code>.</td></tr></tbody></table>

<mark style="color:red;">\*</mark> <sub>Required.</sub>

### Request body example

```json
{
    "extendData": [
        {
            "delegator": "TFwUFWr3QV376677Z8VWXxGUAMFSSSSSSS",
            "isExtend": true,
            "extraAmount": 0,
            "extendTo": 1746702000
        },
        {
            "delegator": "TFwUFWr3QV376677Z8VWXxGUAMFFFFFFFF",
            "isExtend": true,
            "extraAmount": 0,
            "extendTo": 1746702000
        }
    ],
    "receiver": "TFwUFWr3QV376677Z8VWXxGUAMF1111111",
    "resourceType": "BANDWIDTH"
}
```

### Responses

{% tabs %}
{% tab title="201: Success" %}
Returns the order ID on success.

```json
{
    "error": false,
    "message": "Success",
    "data": {
        "orderId": "6819da2d4d1b2aadb0d44eee"
    }
}
```

{% endtab %}

{% tab title="400: Bad Request" %}

```json
{
    "MISSING_PARAMS": "Missing some params in body",
    "INVALID_PARAMS": "Some params are invalid",
    "INTERNAL_ACCOUNT_NOT_FOUND": "internal account does not exist",
    "INTERNAL_BALANCE_ACCOUNT_TOO_LOW": "Balance is not enough",
    "SOME_DELEGATE_CANNOT_EXTEND": "This delegate order can't be extended due to some errors. Please try again later."
}
```

{% endtab %}

{% tab title="401: Unauthorized" %}

```json
{
    "API_KEY_REQUIRED": "Missing api key in headers",
    "INVALID_API_KEY": "api key not correct"
}
```

{% endtab %}

{% tab title="429: Too Many Requests" %}

```json
{
    "RATE_LIMIT": "Rate limit reached"
}
```

{% endtab %}
{% endtabs %}

### Request examples

{% tabs %}
{% tab title="cURL" %}

```bash
curl -X POST "https://api.tronsave.io/v2/extend-request" \
  -H "apikey: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "extendData": [
      {
        "delegator": "YOUR_TRON_ADDRESS",
        "isExtend": true,
        "extraAmount": 0,
        "extendTo": 1746702000
      }
    ],
    "receiver": "YOUR_TRON_ADDRESS",
    "resourceType": "BANDWIDTH"
  }'
```

{% endtab %}

{% tab title="JavaScript" %}

```javascript
const sendExtendRequest = async () => {
  const url = "https://api.tronsave.io/v2/extend-request";

  // extendData comes from the Get extendable delegates response.
  const extendData = [
    {
      delegator: "YOUR_TRON_ADDRESS",
      isExtend: true,
      extraAmount: 0,
      extendTo: 1746702000,
    },
  ];

  const body = {
    extendData,
    receiver: "YOUR_TRON_ADDRESS",
    resourceType: "BANDWIDTH",
  };

  const res = await fetch(url, {
    method: "POST",
    headers: {
      apikey: "YOUR_API_KEY",
      "content-type": "application/json",
    },
    body: JSON.stringify(body),
  });

  const response = await res.json();
  // {
  //   "error": false,
  //   "message": "Success",
  //   "data": { "orderId": "6819da2d4d1b2aadb0d44eee" }
  // }
  return response;
};
```

{% endtab %}

{% tab title="Python" %}

```python
import requests

url = "https://api.tronsave.io/v2/extend-request"
headers = {
    "apikey": "YOUR_API_KEY",
    "Content-Type": "application/json",
}
# extend_data comes from the Get extendable delegates response.
extend_data = [
    {
        "delegator": "YOUR_TRON_ADDRESS",
        "isExtend": True,
        "extraAmount": 0,
        "extendTo": 1746702000,
    },
]
body = {
    "extendData": extend_data,
    "receiver": "YOUR_TRON_ADDRESS",
    "resourceType": "BANDWIDTH",
}

response = requests.post(url, headers=headers, json=body)
print(response.json())
```

{% endtab %}

{% tab title="Java" %}

```java
import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;

public class ExtendRequest {
    public static void main(String[] args) throws Exception {
        String url = "https://api.tronsave.io/v2/extend-request";
        String body = """
            {
              "extendData": [
                {
                  "delegator": "YOUR_TRON_ADDRESS",
                  "isExtend": true,
                  "extraAmount": 0,
                  "extendTo": 1746702000
                }
              ],
              "receiver": "YOUR_TRON_ADDRESS",
              "resourceType": "BANDWIDTH"
            }
            """;

        HttpClient client = HttpClient.newHttpClient();
        HttpRequest request = HttpRequest.newBuilder()
                .uri(URI.create(url))
                .header("apikey", "YOUR_API_KEY")
                .header("Content-Type", "application/json")
                .POST(HttpRequest.BodyPublishers.ofString(body))
                .build();

        HttpResponse<String> response =
                client.send(request, HttpResponse.BodyHandlers.ofString());
        System.out.println(response.body());
    }
}
```

{% endtab %}

{% tab title="Go" %}

```go
package main

import (
	"bytes"
	"fmt"
	"io"
	"net/http"
)

func main() {
	url := "https://api.tronsave.io/v2/extend-request"
	body := []byte(`{
		"extendData": [
			{
				"delegator": "YOUR_TRON_ADDRESS",
				"isExtend": true,
				"extraAmount": 0,
				"extendTo": 1746702000
			}
		],
		"receiver": "YOUR_TRON_ADDRESS",
		"resourceType": "BANDWIDTH"
	}`)

	req, _ := http.NewRequest("POST", url, bytes.NewBuffer(body))
	req.Header.Set("apikey", "YOUR_API_KEY")
	req.Header.Set("Content-Type", "application/json")

	resp, err := http.DefaultClient.Do(req)
	if err != nil {
		panic(err)
	}
	defer resp.Body.Close()

	out, _ := io.ReadAll(resp.Body)
	fmt.Println(string(out))
}
```

{% endtab %}

{% tab title="Rust" %}

```rust
use serde_json::json;

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let url = "https://api.tronsave.io/v2/extend-request";
    let body = json!({
        "extendData": [
            {
                "delegator": "YOUR_TRON_ADDRESS",
                "isExtend": true,
                "extraAmount": 0,
                "extendTo": 1746702000_i64
            }
        ],
        "receiver": "YOUR_TRON_ADDRESS",
        "resourceType": "BANDWIDTH"
    });

    let client = reqwest::blocking::Client::new();
    let response = client
        .post(url)
        .header("apikey", "YOUR_API_KEY")
        .header("Content-Type", "application/json")
        .json(&body)
        .send()?;

    println!("{}", response.text()?);
    Ok(())
}
```

{% endtab %}
{% endtabs %}

## Option 2: Extend using a signed transaction

This option does not require an API key. Instead, you build and sign the payment transaction with your own private key and include it as `signedTx`.

### Request body

<table><thead><tr><th width="150">Field</th><th width="170">Type</th><th>Description</th></tr></thead><tbody><tr><td><code>receiver</code><mark style="color:red;">*</mark></td><td>String</td><td>The address that receives the resource.</td></tr><tr><td><code>extendData</code><mark style="color:red;">*</mark></td><td>Array</td><td>Array of extend data. Use the response from the estimate API — see Get extendable delegates.</td></tr><tr><td><code>resourceType</code></td><td>String</td><td><code>"ENERGY"</code> or <code>"BANDWIDTH"</code>. Default: <code>"ENERGY"</code>.</td></tr><tr><td><code>signedTx</code></td><td>SignedTransaction</td><td>Signed transaction, as a JSON object (the <code>signedTx</code> from <a href="/pages/vVxYNWQx7R2pVWfkgDOA">Get signed transaction</a>).</td></tr></tbody></table>

<mark style="color:red;">\*</mark> <sub>Required.</sub>

{% hint style="info" %}

* To create a signed transaction, follow [Get signed transaction](/developers/api-reference/buy-resources/signed-tx/get-signed-transaction.md).
* The amount of TRX required for signing is provided in the `total_estimate_trx` field of the [Get extendable delegates](/developers/api-reference/extend-orders/get-extendable-delegates.md) API response.
  {% endhint %}

### Request body example

```json
{
    "extendData": [
        {
            "delegator": "TGGVrYaT8XoosBEXPp6dmSZkoh11223344",
            "isExtend": true,
            "extraAmount": 0,
            "extendTo": 1746403201
        }
    ],
    "receiver": "TGGVrYaT8XoosBEXPp6dmSZkoh123456",
    "resourceType": "BANDWIDTH",
    "signedTx": {
        "visible": false,
        "txID": "446eed36e31249b98b201db2e81a3825b185f1a3d8b2fea348b24fc021e58e0d",
        "raw_data": {
            "contract": [
                {
                    "parameter": {
                        "value": {
                            "amount": 5500000,
                            "owner_address": "417a0d868d1418c9038584af1252f85d486502eec0",
                            "to_address": "41055756f33f419278d9ea059bd2b21120e6add748"
                        },
                        "type_url": "type.googleapis.com/protocol.TransferContract"
                    },
                    "type": "TransferContract"
                }
            ],
            "ref_block_bytes": "0713",
            "ref_block_hash": "6c5f7686f4176139",
            "expiration": 1691465106000,
            "timestamp": 1691465046758
        },
        "raw_data_hex": "0a02071322086c5f7686f417613940d084b5999d315a68080112640a2d747970652e676f6f676c65617069732e636f6d2f70726f746f636f6c2e5472616e73666572436f6e747261637412330a15417a0d868d1418c9038584af1252f85d486502eec0121541055756f33f419278d9ea059bd2b21120e6add74818e0fcb70670e6b5b1999d31",
        "signature": ["xxxxxxxxx"]
    }
}
```

### Responses

{% tabs %}
{% tab title="201: Success" %}
Returns the order ID on success.

```json
{
    "error": false,
    "message": "Success",
    "data": {
        "orderId": "6818426a65fa8ea36d119d2c"
    }
}
```

{% endtab %}

{% tab title="400: Bad Request" %}

```json
{
    "MISSING_PARAMS": "Missing some params in body",
    "INVALID_PARAMS": "Some params are invalid",
    "INTERNAL_ACCOUNT_NOT_FOUND": "internal account does not exist",
    "INTERNAL_BALANCE_ACCOUNT_TOO_LOW": "Balance is not enough",
    "SOME_DELEGATE_CANNOT_EXTEND": "This delegate order can't be extended due to some errors. Please try again later."
}
```

{% endtab %}

{% tab title="429: Too Many Requests" %}

```json
{
    "RATE_LIMIT": "Rate limit reached"
}
```

{% endtab %}
{% endtabs %}

### Request examples

{% tabs %}
{% tab title="cURL" %}

```bash
curl -X POST "https://api.tronsave.io/v2/extend-request" \
  -H "Content-Type: application/json" \
  -d '{
    "extendData": [
      {
        "delegator": "YOUR_TRON_ADDRESS",
        "isExtend": true,
        "extraAmount": 0,
        "extendTo": 1746403201
      }
    ],
    "receiver": "YOUR_TRON_ADDRESS",
    "resourceType": "BANDWIDTH",
    "signedTx": { "...": "signed transaction object" }
  }'
```

{% endtab %}

{% tab title="JavaScript" %}

```javascript
const sendExtendRequest = async (extendData, signedTx) => {
  const url = "https://api.tronsave.io/v2/extend-request";

  // extendData comes from Get extendable delegates.
  // signedTx is built from your private key — see Get signed transaction.
  const body = {
    extendData,
    receiver: "YOUR_TRON_ADDRESS",
    resourceType: "BANDWIDTH",
    signedTx,
  };

  const res = await fetch(url, {
    method: "POST",
    headers: {
      "content-type": "application/json",
    },
    body: JSON.stringify(body),
  });

  const response = await res.json();
  // {
  //   "error": false,
  //   "message": "Success",
  //   "data": { "orderId": "6818426a65fa8ea36d119d2c" }
  // }
  return response;
};
```

{% endtab %}

{% tab title="Python" %}

```python
import requests

url = "https://api.tronsave.io/v2/extend-request"
headers = {
    "Content-Type": "application/json",
}
# extend_data comes from Get extendable delegates.
# signed_tx is built from your private key — see Get signed transaction.
body = {
    "extendData": extend_data,
    "receiver": "YOUR_TRON_ADDRESS",
    "resourceType": "BANDWIDTH",
    "signedTx": signed_tx,
}

response = requests.post(url, headers=headers, json=body)
print(response.json())
```

{% endtab %}

{% tab title="Java" %}

```java
import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;

public class ExtendRequestSigned {
    public static void main(String[] args) throws Exception {
        String url = "https://api.tronsave.io/v2/extend-request";
        // extendData comes from Get extendable delegates.
        // signedTx is built from your private key — see Get signed transaction.
        String body = """
            {
              "extendData": [
                {
                  "delegator": "YOUR_TRON_ADDRESS",
                  "isExtend": true,
                  "extraAmount": 0,
                  "extendTo": 1746403201
                }
              ],
              "receiver": "YOUR_TRON_ADDRESS",
              "resourceType": "BANDWIDTH",
              "signedTx": { }
            }
            """;

        HttpClient client = HttpClient.newHttpClient();
        HttpRequest request = HttpRequest.newBuilder()
                .uri(URI.create(url))
                .header("Content-Type", "application/json")
                .POST(HttpRequest.BodyPublishers.ofString(body))
                .build();

        HttpResponse<String> response =
                client.send(request, HttpResponse.BodyHandlers.ofString());
        System.out.println(response.body());
    }
}
```

{% endtab %}

{% tab title="Go" %}

```go
package main

import (
	"bytes"
	"fmt"
	"io"
	"net/http"
)

func main() {
	url := "https://api.tronsave.io/v2/extend-request"
	// extendData comes from Get extendable delegates.
	// signedTx is built from your private key — see Get signed transaction.
	body := []byte(`{
		"extendData": [
			{
				"delegator": "YOUR_TRON_ADDRESS",
				"isExtend": true,
				"extraAmount": 0,
				"extendTo": 1746403201
			}
		],
		"receiver": "YOUR_TRON_ADDRESS",
		"resourceType": "BANDWIDTH",
		"signedTx": {}
	}`)

	req, _ := http.NewRequest("POST", url, bytes.NewBuffer(body))
	req.Header.Set("Content-Type", "application/json")

	resp, err := http.DefaultClient.Do(req)
	if err != nil {
		panic(err)
	}
	defer resp.Body.Close()

	out, _ := io.ReadAll(resp.Body)
	fmt.Println(string(out))
}
```

{% endtab %}

{% tab title="Rust" %}

```rust
use serde_json::json;

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let url = "https://api.tronsave.io/v2/extend-request";
    // extendData comes from Get extendable delegates.
    // signed_tx is built from your private key — see Get signed transaction.
    let body = json!({
        "extendData": [
            {
                "delegator": "YOUR_TRON_ADDRESS",
                "isExtend": true,
                "extraAmount": 0,
                "extendTo": 1746403201_i64
            }
        ],
        "receiver": "YOUR_TRON_ADDRESS",
        "resourceType": "BANDWIDTH",
        "signedTx": {}
    });

    let client = reqwest::blocking::Client::new();
    let response = client
        .post(url)
        .header("Content-Type", "application/json")
        .json(&body)
        .send()?;

    println!("{}", response.text()?);
    Ok(())
}
```

{% endtab %}
{% endtabs %}

{% hint style="info" %}
To integrate with the **TRON Nile Testnet**, replace the base URL with `https://api-dev.tronsave.io`.
{% endhint %}

## Next steps

* Start the flow with [Get extendable delegates](/developers/api-reference/extend-orders/get-extendable-delegates.md).
* Build a signed transaction with [Get signed transaction](/developers/api-reference/buy-resources/signed-tx/get-signed-transaction.md).
* Set up [Authentication](/developers/authentication.md) before calling the API.


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://docs.tronsave.io/developers/api-reference/extend-orders/extend-request.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.