如何在Node JS中创建和发送Litecoin Testnet交易

Question

我是区块链新手。我已经完成了比特币交易的创建，并将其原始交易成功发送到了区块链网络。我在将莱特币的原始交易发送到区块链网络时遇到问题。我的代码在这里

var broadcast_tx = function(tx) {
    console.log("tx in hex = ", tx.toHex());
    var req = {
      method: 'POST',
      url: 'https://chain.so/api/v2/send_tx/LTCTEST',
      headers: {
        'Content-Type': "application/json"
      },
      data: { "tx_hex": tx.toHex() }
     }

     $http(req).then(function(response){
      demo.showNotification("Operation successful","fa fa-check",2);
     }, function(error){
        demo.showNotification(err,"fa fa-check",3);

     });
  }