How to buy energy

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In this article there are 2 examples of how to buy energy:

With credit
- You already have a credit balance with the service.
- You send your API key along with the order details.
- No blockchain transaction or private key is required.
Without credit:
- You pay for the order directly with TRX.
- Your application creates a TRX transaction for the required payment.
- The transaction is signed using your private key.
- The signed transaction is then sent to the API together with the energy rental order.

This article shows two ways to buy TRON energy through the API:

Example of buying with credit

This script creates an energy rental order and pays for it in credit.

Node.js

const axios = require('axios');
const TronWeb = require('tronweb');

const TRON_NODE = "https://api.trongrid.io";
const tronWeb = new TronWeb(
    new TronWeb.providers.HttpProvider(TRON_NODE),
    new TronWeb.providers.HttpProvider(TRON_NODE),
    TRON_NODE
);

async function BuyTest()
{
    const API_KEY = "YOUR_API_KEY";
    const API_SERVER = "TEMkRxLtCCdL4BCwbPXbbNWe4a9gtJ7kq7";

    const MARKET = 'Open';
    const ORIGIN = "YOUR_ORIGIN_ADDRESS";
    const TARGET = "YOUR_TARGET_ADDRESS";
    const RESOURCE = 0; // 0 energy, 1 bandwidth
    const PRICE = 50;
    const AMOUNT = 64500; // Energy amount points, min 100000
    const DURATION = 300; // 300 = 5 minutes
    const PAYMENT = parseInt(((PRICE * AMOUNT * (DURATION + ((DURATION < 86400) ? 86400 : 0))) / 86400).toFixed(0));

    const PARTFILL = true; // true = allow several addresses to fill your order
    // No need for signature, only api-key
    // We send the order
    const params =
    {
        market: MARKET,
        address: ORIGIN,
        target: TARGET,
        amount: AMOUNT,
        resource: RESOURCE,
        duration: DURATION,
        price: PRICE,
        partfill: PARTFILL,
        signed_ms: undefined,
        signed_tx: undefined,
        api_key: API_KEY,
    };

    console.log(params);

    const API_URL = `https://api.tronenergy.market/order/new`;

    axios.post(API_URL, params)
        .then((res) =>
        {
            console.log("all ok, order created");
            console.log(res.data); // order created response in res.data { order: 1644 }
        })
        .catch((error) =>
        {
            console.error("woops, something wrong happened!");
        });
}

BuyTest();

Example script of how to buy energy without credit:

This script creates an energy rental order and pays for it in TRX instead of with credit.

Node.js

const axios = require('axios');
const TronWeb = require('tronweb');

const TRON_NODE = "https://api.trongrid.io/";
const PRIVATE_KEY = "YOUR_PK";

const tronWeb =  new TronWeb(
    new TronWeb.providers.HttpProvider( TRON_NODE ),
    new TronWeb.providers.HttpProvider( TRON_NODE ),
    TRON_NODE,
    PRIVATE_KEY //this should match origin address
);

const AMOUNT = 10000 //energy amount points, min 100000
const DURATION = 300 //Duration in seconds. 300 (5 minutes)
const PRICE = 40 //suns per day, whatever price you want
const SERVER_ADDRESS = "TEMkRxLtCCdL4BCwbPXbbNWe4a9gtJ7kq7";
const PAYMENT = parseInt(((PRICE * AMOUNT * (DURATION + ((DURATION < 86400) ? 86400 : 0))) / 86400).toFixed(0));//we need to increment 1 day of duration per orders smaller than 24 hours / 86400 seconds
const ORIGIN = tronWeb.defaultAddress.base58;

async function BuyTest()
{
    //we sign the tx
    const raw_tx  = await tronWeb.transactionBuilder.sendTrx(SERVER_ADDRESS, PAYMENT , ORIGIN);
    const signed_tx = await tronWeb.trx.sign( raw_tx );

    //we send the order
    let params =
    {
        market: 'Open',
        address: "TEMkRxLtCCdL4BCwbPXbbNWe4a9gtJ7kq7",
        target: "TAtPNH8sNWHJXFaZPAQJu9fMasGZMTnbnj",
        amount: AMOUNT, //energy amount points, min 100000
        resource: 0, //0 energy, 1 bandwidth
        duration: DURATION, //Duration in seconds. 300 (5 minutes)
        price: PRICE, //suns per day, whatever price you want
        partfill: true, //true for allowing several address to fill. false will force 1 address to fill it all
        signed_tx: JSON.stringify(signed_tx),
    }

    const API_URL = `https://api.tronenergy.market/order/new`;
    axios.post(API_URL, params,)
    .then((res)=>
    {
        console.log("all ok, order created");
        console.log(res.data); //order created response in res.data { order: 1644 }
    })
    .catch((error) =>
    {
        console.error("woops, something wrong happened!");
        console.error(error.response.data);
    });
}

BuyTest();