What TronWeb version is required?

TronWeb 6.x or later. Install via npm install tronweb. Note that the import is destructured: const { TronWeb } = require("tronweb").

Why does the signature have to come from the same wallet that sent TRX?

It is the API's only proof that you authorized the delegation. Without it, anyone watching the chain could claim energy for any payment.

TronWeb集成 | TronEnergy Docs

使用TronWeb完成 Node.js 集成。每个步骤都是一个独立的代码块，您可以将其复制到您的项目中。完整的端到端示例位于文末。

先决条件： Node.js 18+ tronweb 已安装（npm install tronweb），一个已充值的Tron钱包。

流程

无需API密钥，无需注册。您的代码会将TRX链上发送到TronEnergy支付地址，签署一条证明所有权的报文，然后领取委托。 Energy大约 3 秒后到账。之后，您的代码会使用委托的能量发送USDT 。

定价是线性的：每TRX 16,250 Energy 。 Minimum order 4 TRX (65,000 Energy — one standard USDT transfer), maximum 1,000 TRX (16.25M Energy). The amount you send determines exactly how much Energy comes back — there are no tiers or packages. For a single standard transfer, send 4. For a new-wallet transfer, send 8. For batch work, send more. The code below uses a trxAmount variable so you can change it in one place.

步步

1. 设置

setup

    const { TronWeb } = require('tronweb'); // destructured: the default import is broken in v6
    
    const tronWeb = new TronWeb({
      fullHost: 'https://api.trongrid.io',
      privateKey: process.env.TRON_PRIVATE_KEY,
    });
    
    const API  = 'https://api.tronnrg.com';
    const ADDR = 'TFqUiCu1JwLHHnBNeaaVKH7Csm4aA3YhZx'; // API payment address
    const USDT = 'TR7NHqjeKQxGTCi8q8ZY4pL8otSzgjLj6t';
  

2. 发送TRX

send payment

    const TRX_AMOUNT = 4; // Linear: 16,250 energy per TRX. Min 4, max 1000.
    // 4 → 65k (standard) · 8 → 130k (new wallet) · 40 → 650k (10 transfers)
    
    const payment = await tronWeb.trx.sendTransaction(ADDR, TRX_AMOUNT * 1e6);
    
    console.log('Payment tx:', payment.txid);

3. 争取代表团席位

claim delegation

    // Sign: proves you are the sender
    const msg = `${payment.txid}:${tronWeb.defaultAddress.base58}`;
    const sig = await tronWeb.trx.signMessageV2(msg);

    const delegation = await fetch(`${API}/delegate`, {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({
        tx_hash: payment.txid,
        delegate_to: tronWeb.defaultAddress.base58,
        signature: sig,
      }),
    }).then(r => r.json());
    
    if (delegation.error) {
      throw new Error(delegation.message);
    }
    
    console.log('Energy delegated:', delegation.energy); // TRX_AMOUNT × 16,250
  

4. 发送USDT

send usdt

    const contract = await tronWeb.contract().at(USDT);
    const tx = await contract.transfer(
      recipientAddress, Math.round(usdtAmount * 1e6)
    ).send({ feeLimit: 50_000_000 });
    
    console.log('USDT sent:', tx);
  

错误处理

handling errors

    const result = await fetch(`${API}/delegate`, { ... })
      .then(r => r.json());
    
    if (result.error) {
      switch (result.error) {
        case 'payment_verification_failed':
          // Payment not yet indexed on-chain. Wait 3s and retry.
          break;
        case 'hash_already_used':
          // Already claimed. Don't retry.
          break;
        case 'signature_mismatch':
          // Sender of TRX != signer of the message. Sign with the same key.
          break;
        case 'delegation_failed':
          // Provider could not deliver. Retry or contact support with result.ref.
          break;
      }
    }
  

完整示例

将此内容复制到文件中，设置环境变量，然后运行它。该脚本会发送TRX ，对消息进行签名，声明委托并重试，然后发送USDT 。

delegate-energy.js

const { TronWeb } = require('tronweb'); // destructured: default import is broken in v6

const tronWeb = new TronWeb({
  fullHost: 'https://api.trongrid.io',
  privateKey: process.env.TRON_PRIVATE_KEY,
});

const API  = 'https://api.tronnrg.com';
const ADDR = 'TFqUiCu1JwLHHnBNeaaVKH7Csm4aA3YhZx';
const USDT = 'TR7NHqjeKQxGTCi8q8ZY4pL8otSzgjLj6t';

async function claimWithRetry(txHash, delegateTo, signature, retries = 3) {
  for (let i = 0; i < retries; i++) {
    const res = await fetch(`${API}/delegate`, {
      method:  'POST',
      headers: { 'Content-Type': 'application/json' },
      body:    JSON.stringify({ tx_hash: txHash, delegate_to: delegateTo, signature }),
    }).then(r => r.json());

    if (!res.error) return res;
    if (res.error !== 'payment_verification_failed') throw new Error(res.message);
    await new Promise(r => setTimeout(r, 3000));
  }
  throw new Error('Transaction not found after retries');
}

async function main() {
  const recipient  = 'TRecipientWallet';
  const trxAmount = 4; // min 4, max 1000 — you get trxAmount × 16,250 energy

  // 1. Send TRX (linear pricing: 16,250 energy per TRX)
  const payment = await tronWeb.trx.sendTransaction(ADDR, trxAmount * 1e6);
  console.log('Payment:', payment.txid);

  // 2. Claim delegation
  // Sign: proves you are the sender
  const message = `${payment.txid}:${recipient}`;
  const signature = await tronWeb.trx.signMessageV2(message);

  const result = await claimWithRetry(payment.txid, recipient, signature);
  console.log('Delegated:', result.energy, 'energy');
  console.log('Delegation tx:', result.delegations[0].tx);  // verify on TronScan
  console.log('Ref:', result.ref);

  // 3. Send USDT
  const contract = await tronWeb.contract().at(USDT);
  const tx = await contract.transfer(recipient, 10 * 1e6).send();
  console.log('USDT sent:', tx);
}

main().catch(console.error);

务必加上签名。 It proves you are the wallet that sent the TRX. Without it, the API rejects the request with missing_signature. The signature is what makes the API safe to use without an API key: it cryptographically proves you authorised the delegation.