Deploy Contract

Deploy contract is same as make a transaction to node. I want to send the contract to node1 and cost the gas from account of node1 .

• unlock account of node2 on console

> personal.unlockAccount("683f257a240789cc8ffe6f0b4f17dc57405b6ce6")
Unlock account 683f257a240789cc8ffe6f0b4f17dc57405b6ce6
Passphrase: 
true

• start mining on node2

> miner.start()
INFO [08-15|15:16:12] Starting mining operation 
null
> INFO [08-15|15:16:12] Commit new mining work                   number=1 txs=0 uncles=0 elapsed=118µs
INFO [08-15|15:16:12] Successfully sealed new block            number=1 hash=0147be…bf5996
INFO [08-15|15:16:12] 🔨 mined potential block                  number=1 hash=0147be…bf5996

• modify index.js to unlock the account of node1

...
const accountAddress = '2a7a93ca16e95a6e4478bf67e33ce3a9c20bf66d';
const accountPassword = 'node1';

const web3 = new Web3();
web3.setProvider(new web3.providers.HttpProvider(ethereumUri));

if(!web3.isConnected()) {
    throw new Error(`unable to connect to ethereum node at ${ethereumUri}`);
} else {
    console.log(`connected to ehterum node at ${ethereumUri}`);
    const coinbase = web3.eth.coinbase;
    console.log(`coinbase: ${coinbase}`);
    const balance = web3.eth.getBalance(coinbase);
    console.log(`balance: ${web3.fromWei(balance, 'ether')} ETH`);
    console.log(web3.eth.accounts); 

    if (web3.personal.unlockAccount(accountAddress, accountPassword)) {
        console.log(`${accountAddress} is unlocaked`);
    } else {
        console.log(`unlock failed, ${accountAddress}`);
    }
}
...

• append below code to deploy contract to node1

// compile contract
const source = fs.readFileSync("./contracts/Sample.sol", 'utf8');
console.log('compiling contract...');
const compiledContract = solc.compile(source);
console.log('done');
for (let contractName in compiledContract.contracts) {
    var bytecode = compiledContract.contracts[contractName].bytecode;
    var abi = JSON.parse(compiledContract.contracts[contractName].interface);
}
console.log(JSON.stringify(abi, undefined, 2));

// deploy contract
const gasEstimate = web3.eth.estimateGas({ data: '0x' + bytecode });
console.log(`gasEstimate = ${gasEstimate}`);

const MyContract = web3.eth.contract(abi);
console.log('deploying contract...');

const myContractReturned = MyContract.new([], {
    from: accountAddress,
    data: `0x${bytecode}`,
    gas: gasEstimate + 50000
}, function (err, myContract) {
    if (!err) {
        if (!myContract.address) {
            console.log(`myContract.transactionHash = ${myContract.transactionHash}`);
        } else {
            console.log(`myContract.address = ${myContract.address}`);
            global.contractAddress = myContract.address;
        }
    } else {
        console.log(err);
    }
});

(function wait () {
    setTimeout(wait, 1000);
})();

$ node index.js
connected to ehterum node at http://localhost:8545
coinbase: 0x2a7a93ca16e95a6e4478bf67e33ce3a9c20bf66d
balance: 9.04625697166532776746648320380374280103671755200316906558262375061821325312e+56 ETH
[ '0x2a7a93ca16e95a6e4478bf67e33ce3a9c20bf66d' ]
2a7a93ca16e95a6e4478bf67e33ce3a9c20bf66d is unlocaked
compiling contract...
done
[
  {
    "constant": false,
    "inputs": [
      {
        "name": "a",
        "type": "uint256"
      },
      {
        "name": "b",
        "type": "uint256"
      }
    ],
    "name": "add",
    "outputs": [
      {
        "name": "",
        "type": "uint256"
      }
    ],
    "payable": false,
    "type": "function"
  },
  {
    "constant": true,
    "inputs": [],
    "name": "getCount",
    "outputs": [
      {
        "name": "",
        "type": "uint256"
      }
    ],
    "payable": false,
    "type": "function"
  }
]
gasEstimate = 120724
deploying contract...
myContract.transactionHash = 0x51718da05b2106ad2fa8652efca39c529dfefa87f2866ddbff426906bba4e432
myContract.address = 0xce5b2a924367a7c7f638b1c269518d6064bd0e93