PROSAGA码农传奇-以太坊-Solidity编译器 - HelloWorld智能合约的问题

<div class =“post-text”itemprop =“text”>
  <P>
    问题是，你我不能把原始的可靠性智能合约纳入其中
     <code>
      solc.compile()
    </code>
     功能。必须有
     <code>
      Compiler Standard Input JSON
    </code>
    。基于我的
    <a href="https://stackoverflow.com/questions/53795971/solidity-solidity-code-to-input-json-description/53798746#53798746">
      另一个线程
    </A>
     我发现这个解决方案：
  </p>
   <pre>
    <code>
      > var Web3 = require('web3');
> var solc = require('solc');
> var web3 = new Web3(new Web3.providers.HttpProvider('http://localhost:8545'));
> var CONTRACT_FILE = 'HelloWorld.sol'
> var content =fs.readFileSync(CONTRACT_FILE).toString()
> var input = {
  language: 'Solidity',
  sources: {
    [CONTRACT_FILE]: {
      content: content
    }
  },
  settings: {
    outputSelection: {
      '*': {
        '*': ['*']
      }
    }
  }
}

> var compiled = solc.compile(JSON.stringify(input))
> var output = JSON.parse(compiled)
> var abi = output.contracts[CONTRACT_FILE]['HelloWorld'].abi
> var bytecode = output.contracts[CONTRACT_FILE]['HelloWorld'].evm.bytecode.object
> var HelloWorld = new web3.eth.Contract(abi);
> var HelloWorldTx = HelloWorld.deploy({data: bytecode, arguments: [web3.utils.asciiToHex('Hello')]});
> web3.eth.estimateGas(HelloWorldTx).then(console.log); //this does not work, because it can not connect to the localhost:8545. I don't know why.
> HelloWorldTx.send({from: '0x99d54a45f2cd3b9c6443d623003416aaf944338e', gas: 1000000}).then(console.log);

</code>
  </pre>
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