问Javascript web3js前端

EN

struct EnContract {
    uint price;
    uint amount;
    string energysource;
    address owner;
}

EnContract[] public encontracts;

mapping (uint => address) public contractToOwner;
mapping (address => uint) public ownerContractCount;

function _createContract(uint _price, uint _amount, string _energysource) internal {
    uint id = encontracts.push(EnContract(_price, _amount, _energysource, msg.sender)) - 1;
    contractToOwner[id] = msg.sender;
    ownerContractCount[msg.sender]++;
}

function createContract(uint _price, uint _amount, string _energysource) public {
    require(ownerContractCount[msg.sender] == 0);
    _createContract(_price, _amount, _energysource);
}
}

var Web3 = require('web3');
var web3 = new Web3('http://localhost:8545');

var abi = [myABI];
var contractAddress = 'myAddress';
var contract = new web3.eth.Contract(abi, contractAddress);

<h3>Web3 — Usage Example</h3>
<div class=”tab-content”>
  <div role=”tabpanel” class=”tab-pane active” id=”blockchain”>
    <h3> 1. Set the value in the blockchain</h3>
    <div class=”form-group form-inline”>
      <input type=”text” class=”text form-control” value="price">
      <input type=”text” class=”text form-control” value="amount">
      <input type=”text” class=”text form-control” value="energysource">
      <button class=”set btn btn-primary”>Set Value</button>
    </div>
    <h3> 2. Get the current value</h3>
    <div class=”form-group”>
      <div>
        current value is <span class=”value”></span>
      </div>
      <button class=”get btn btn-primary”>Get Value</button>
    </div>
  </div>
</div>