部署智能合约Web3无效的RPC响应

Question

I'm trying to deploy a contract on my node server as follows:

var escrow = 'pragma solidity ^0.4.4;contract Escrow {address public challenger;address public participant;address public arbiter;function Escrow(address _participant, address _arbiter) {challenger = msg.sender;participant = _participant;arbiter = _arbiter;}function payoutToParticipant() {if(msg.sender == challenger || msg.sender == arbiter) {participant.send(this.balance);}}function refundToChallenger() {if(msg.sender == challenger || msg.sender == arbiter) {challenger.send(this.balance);}}function getBalance() constant returns (uint) {return this.balance;}}';

module.exports.createEscrowContract = function(req, res) {
    //Set variables
    var challenger = '0xE6...';
    var participant = '0x4E...';
    var arbiter = '0xe5C...';

    //Compile contract
    var compiled = solc.compile(escrow);

    console.log(compiled);
    const web3 = new Web3();
    web3.setProvider(new 
    web3.providers.HttpProvider("https://mainnet.infura.io/XXXX"));

    //Store bytecode
    var bytecode = compiled.contracts[':Escrow'].bytecode;

    //Store abi
    var abi = JSON.parse(compiled.contracts[':Escrow'].interface);

    var escrowContract = web3.eth.contract(abi);

    //Seems to compile fine.
    console.log(escrowContract);

    //Deploy contract
    var deployed = escrowContract.new(participant, arbiter, {
      from: challenger,
      data: bytecode,
      gas: 470000,
      }, (error, contract) => {

           console.log(error); 
           // Invalid JSON RPC response: ""
           console.log(contract);
           //undefined
      });


}

I've tried several things and read in the documentation but can't seem to find anything! I'm sure I can't be the only person with this issue, I'm using web3@0.20.

If anyone can help I'd really appreciate it.

Answer 1

Two issues I can spot:

1. You're passing 47,000,000 gas, which is absurdly high. To put it in context, an entire block can only use 8,000,000 gas. If you actually used 47 million gas at current gas prices, it would cost over $200 USD. I believe that this would cause your transaction to be rejected before any node attempted to run it.
2. Infura , as a public node, can't ever have your private key (in this case, the challenger 's private key), so it can't sign a transaction for you. If challenger is your account, then you can hold the key and sign the deployment transaction before broadcasting it. If challenger is a user of your app, you're better off having the user sign and send the transaction themselves via something like MetaMask .