tronweb未签名的transaction怎么签名交易

要签名未签名的交易，您需要使用TronWeb中的`trx.sign`方法。以下是一个示例：

const TronWeb = require('tronweb');
const HttpProvider = TronWeb.providers.HttpProvider;
const fullNode = new HttpProvider('https://api.trongrid.io');
const solidityNode = new HttpProvider('https://api.trongrid.io');
const eventServer = new HttpProvider('https://api.trongrid.io');
const privateKey = 'YOUR_PRIVATE_KEY';
const tronWeb = new TronWeb(fullNode, solidityNode, eventServer, privateKey);

const unsignedTransaction = {
    to: 'ADDRESS_TO_SEND_TRX',
    amount: 1000000,
    from: 'YOUR_ADDRESS',
    privateKey: ''
};

const signedTransaction = await tronWeb.trx.sign(unsignedTransaction);
console.log(signedTransaction);

在此示例中，您需要将`unsignedTransaction`对象替换为您要签名的交易，并将`privateKey`替换为您的私钥。调用`tronWeb.trx.sign`方法会返回已签名的交易，您可以将其广播到网络中以执行交易。