Estimate TRX

Estimate the TRX required to create fast charge orders before placing them, using your API key and prefunded internal account.

Estimate the total TRX needed to create one or more fast charge orders before placing them. The endpoint resolves the unit price, reports how many orders the system can currently match, and returns your current internal account balance.

To call this endpoint you need a TronSave API key tied to a prefunded internal account. See Authentication for how to obtain and use an API key.

Endpoint

POST https://api.tronsave.io/v0/fast-charge-estimate-order-request

Rate limit: 1 request per 2 seconds.

Headers

Name	Type	Description
apikey*	String	TronSave API key that is associated with the internal account. Required.

Request body

Name	Type	Description
receiver_count	String	Number of orders to create.
amount	Number	Amount of resource you want to buy.
max_price_accept	Number	Only create an order when the estimated price is less than this value.
resource_type	String	"ENERGY"
duration_sec	Number	The duration of the resource rental, in seconds.

Request body example

{
    "receiver_count": 10,
    "amount": 130000,
    "max_price_accept": 70,
    "resource_type": "ENERGY",
    "duration_sec": 900
}

Responses

200 OK — Success

{
    "charge_amount": number,                // Total payout for all orders
    "price": number,                        // Price, unit is SUN
    "max_receiver_can_provide": number,     // The maximum number of orders the system is ready to match
    "internal_balance": string,             // Balance of your internal account
    "duration_sec": number                  // Rent duration, unit is seconds
}

Example success response:

{
    "charge_amount": 44850000,
    "price": 69,
    "max_receiver_can_provide": 8,
    "able_to_match": true,
    "internal_balance": "117505470"
}

400 Bad Request — Validation error

Returned when a required field is missing or invalid. The message names the offending field:

{
    "statusCode": 400,
    "code": "FST_ERR_VALIDATION",
    "error": "Bad Request",
    "message": "body must have required property 'receiver_count'"
}

The endpoint may also return these business-logic errors:

{
    "INTERNAL_ACCOUNT_NOT_FOUND": "internal account not exists",
    "INTERNAL_BALANCE_ACCOUNT_TOO_LOW": "Balance is not enough"
}

401 Unauthorized — Missing or invalid API key

Returned when the apikey header is missing:

{
    "error": true,
    "message": "TSAS:106 API_KEY_REQUIRED"
}

Returned when the apikey header is present but invalid:

{
    "error": true,
    "message": "TSAS:107 INVALID_API_KEY"
}

429 Too Many Requests — Rate limit reached

{
    "RATE_LIMIT": "Rate limit reached"
}

Request examples

cURL

curl -X POST 'https://api.tronsave.io/v0/fast-charge-estimate-order-request' \
  -H 'apikey: YOUR_API_KEY' \
  -H 'Content-Type: application/json' \
  -d '{
    "receiver_count": 10,
    "amount": 130000,
    "max_price_accept": 70,
    "resource_type": "ENERGY",
    "duration_sec": 900
  }'

JavaScript

const res = await fetch(
  "https://api.tronsave.io/v0/fast-charge-estimate-order-request",
  {
    method: "POST",
    headers: {
      apikey: "YOUR_API_KEY",
      "Content-Type": "application/json",
    },
    body: JSON.stringify({
      receiver_count: 10,
      amount: 130000,
      max_price_accept: 70,
      resource_type: "ENERGY",
      duration_sec: 900,
    }),
  }
);

const data = await res.json();
console.log(data);

Python

import requests

url = "https://api.tronsave.io/v0/fast-charge-estimate-order-request"
headers = {
    "apikey": "YOUR_API_KEY",
    "Content-Type": "application/json",
}
body = {
    "receiver_count": 10,
    "amount": 130000,
    "max_price_accept": 70,
    "resource_type": "ENERGY",
    "duration_sec": 900,
}

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

Java

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

public class EstimateTrx {
    public static void main(String[] args) throws Exception {
        String body = """
            {
                "receiver_count": 10,
                "amount": 130000,
                "max_price_accept": 70,
                "resource_type": "ENERGY",
                "duration_sec": 900
            }
            """;

        HttpClient client = HttpClient.newHttpClient();
        HttpRequest request = HttpRequest.newBuilder()
            .uri(URI.create("https://api.tronsave.io/v0/fast-charge-estimate-order-request"))
            .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());
    }
}

Go

package main

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

func main() {
	body := []byte(`{
		"receiver_count": 10,
		"amount": 130000,
		"max_price_accept": 70,
		"resource_type": "ENERGY",
		"duration_sec": 900
	}`)

	url := "https://api.tronsave.io/v0/fast-charge-estimate-order-request"
	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()

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

Rust

use serde_json::json;

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let client = reqwest::blocking::Client::new();

    let body = json!({
        "receiver_count": 10,
        "amount": 130000,
        "max_price_accept": 70,
        "resource_type": "ENERGY",
        "duration_sec": 900
    });

    let response = client
        .post("https://api.tronsave.io/v0/fast-charge-estimate-order-request")
        .header("apikey", "YOUR_API_KEY")
        .header("Content-Type", "application/json")
        .json(&body)
        .send()?;

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

Next steps

• Review Authentication to set up your API key and internal account.

• See Errors and rate limits for handling the error responses above.

• Learn about Energy and Bandwidth.