Deploy token contract on private chain

Install library

• install Truffle and Solidity

  $ npm --v
  4.1.2
  
  $ sudo npm install -g truffle
  $ truffle version
  Truffle v4.0.3 (core: 4.0.3)
  Solidity v0.4.18 (solc-js)
  
  $ cd Desktop
  $ mkdir myproject && cd myproject
  $ truffle init
  Downloading...
  Unpacking...
  Setting up...
  Unbox successful. Sweet!
  Commands:
    Compile:        truffle compile
    Migrate:        truffle migrate
    Test contracts: truffle test
  

• install OpenZeppelin

  $ npm init
  About to write to /Users/yen/Desktop/myproject/package.json:
  
  {
    "name": "myproject",
    "version": "1.0.0",
    "description": "",
    "main": "truffle.js",
    "directories": {
      "test": "test"
    },
    "scripts": {
      "compile": "truffle compile",
      "deploy": "truffle migrate --network test --reset",
      "test": "echo \"Error: no test specified\" && exit 1"
    },
    "author": "Yen",
    "license": "ISC"
  }
  
  $ npm install zeppelin-solidity
  [email protected] /Users/yen/Desktop/myproject
  └── [email protected]
  

  Zeppelin Solidity Github

Compile contract

Clone the contract from zeppelin-soliditycontracts/examples/SimpleToken.sol to our project /contracts.

• YenToken.sol

  pragma solidity ^0.4.18;
  
  import 'zeppelin-solidity/contracts/token/StandardToken.sol';
  
  contract YenToken is StandardToken {
  
    string public constant name = "YenToken";
    string public constant symbol = "YEN";
    uint8 public constant decimals = 18;
  
    uint256 public constant INITIAL_SUPPLY = 99999 * (10 ** uint256(decimals));
  
    function YenToken() public {
      totalSupply = INITIAL_SUPPLY;
      balances[msg.sender] = INITIAL_SUPPLY;
    }
  }
  

Using below codes to compile contract by Truffle, it will save the result to /build/contracts folder.

• compile it

  $ npm run compile
  
  > [email protected] compile /Users/yen/Desktop/myproject
  > truffle compile
  

Then I can find the ABI and bytecode in /build/contracts/YenToken.json. If I use Web3 to deploy the contract such as below program, I will need them.

const Web3 = require('web3');
const fs = require('fs');

const ethereumUri = 'http://localhost:8487';

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

...

const contract = JSON.parse(fs.readFileSync("./build/contracts/YenCoin.json", 'utf8'));
const gasEstimate = web3.eth.estimateGas({ data: contract.bytecode });
const MyContract = web3.eth.contract(contract.abi);
const myContractReturned = MyContract.new([], {
  from: web3.eth.coinbase,
  data: contract.bytecode,
  gas: gasEstimate
}, 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);
  }
});

Deploy contract

Make sure the nodes of private chain are launched. Then prepares the configuration of Truffle.

• truffle.js

  module.exports = {
    // See <http://truffleframework.com/docs/advanced/configuration>
    networks: {
      test: {
        host: "localhost",
        port: 8487,
        network_id: 36291 // Match any network id by "*"
      }
    },
    solc: {
      optimizer: {
        enabled: true,
        runs: 200
      }
    }
  };
  

Prepare the deploy script.

• 1_initial_migration.js

  const Contract = artifacts.require("./Migrations.sol");
  
  module.exports = function(deployer) {
  };
  

• 2_deploy_yen_token.js

  const Contract = artifacts.require("./YenToken.sol");
  
  module.exports = function(deployer, network, accounts) {
    const gasPrice = Contract.web3.eth.gasPrice;
    const gas = Contract.web3.eth.estimateGas({ data: Contract.bytecode });
    console.log(`network is ${network}`);
    console.log(`accounts are ${accounts}`);
    console.log(`gas price is ${gasPrice} wei`);
    console.log(`pending gas limit is ${Contract.web3.eth.getBlock("pending").gasLimit}`);
    console.log(`estimate gas is ${gas}`);
    deployer.deploy(Contract, {
      overwrite: true,
      gasPrice,
      gas
    });
  };
  

• deploy

  $ npm run deploy
  
  > [email protected] deploy /Users/yen/Desktop/myproject
  > truffle migrate --network test --reset
  
  Using network 'test'.
  
  Running migration: 1_initial_migration.js
  Running migration: 2_deploy_yen_token.js
  network is test
  accounts are 0x4d0362700bcdc69e2e4e083c3f098ca55efd1119
  gas price is 18000000000 wei
  pending gas limit is 48985297
  estimate gas is 666767
    Deploying YenToken...
    ... 0x82c342f48412daef798695fd557a3992764c9716222b3467223fd248304bc384
    YenToken: 0xf13c9660190749124ad90c8defc77cc6c5d36494
  Saving successful migration to network...
    ... 0x891ccf201117e75dbcefe627070a037aa852fb8b83479b16dd533e703381ef28
  Saving artifacts...
  

• on miner2 console

  INFO [12-20|16:40:44] Submitted transaction                    fullhash=0x891ccf201117e75dbcefe627070a037aa852fb8b83479b16dd533e703381ef28 recipient=0xb883cDEdCbC8A09f4E9745de367F0fF124A4fF86
  INFO [12-20|16:40:47] Imported new chain segment               blocks=1 txs=0 mgas=0.000 elapsed=218.881µs mgasps=0.000 number=23 hash=0c27c3…a2526a
  

Truffle will save the contract address to /build/contracts/YenToken.json.

{
  "contractName": "YenToken",
  "abi": [ ... ],
    "id": 97,
    "name": "SourceUnit",
    "src": "0:444:1"
  },
  "compiler": {
    "name": "solc",
    "version": "0.4.18+commit.9cf6e910.Emscripten.clang"
  },
  "networks": {
    "36291": {
      "events": {},
      "links": {},
      "address": "0xf13c9660190749124ad90c8defc77cc6c5d36494"
    }
  },
  "schemaVersion": "1.0.1",
  "updatedAt": "2017-12-20T08:40:50.071Z"
}

• files tree

  $ tree
  .
  ├── build
  │   └── contracts
  │       ├── BasicToken.json
  │       ├── ERC20.json
  │       ├── ERC20Basic.json
  │       ├── Migrations.json
  │       ├── SafeMath.json
  │       ├── StandardToken.json
  │       └── YenToken.json
  ├── contracts
  │   ├── Migrations.sol
  │   └── YenToken.sol
  ├── migrations
  │   ├── 1_initial_migration.js
  │   └── 2_deploy_yen_token.js
  ├── node_modules
  ├── package.json
  ├── test
  └── truffle.js
  

Issue

• exceeds block gas limit

  When I deploy contract, I got the error.

  Error encountered, bailing. Network state unknown. Review successful transactions manually.
  Error: exceeds block gas limit
      at Object.InvalidResponse (/usr/local/lib/node_modules/truffle/build/cli.bundled.js:41484:16)
      at /usr/local/lib/node_modules/truffle/build/cli.bundled.js:328866:36
      at /usr/local/lib/node_modules/truffle/build/cli.bundled.js:176178:11
      at /usr/local/lib/node_modules/truffle/build/cli.bundled.js:324536:9
      at XMLHttpRequest.request.onreadystatechange (/usr/local/lib/node_modules/truffle/build/cli.bundled.js:327565:7)
      at XMLHttpRequestEventTarget.dispatchEvent (/usr/local/lib/node_modules/truffle/build/cli.bundled.js:176407:18)
      at XMLHttpRequest._setReadyState (/usr/local/lib/node_modules/truffle/build/cli.bundled.js:176697:12)
      at XMLHttpRequest._onHttpResponseEnd (/usr/local/lib/node_modules/truffle/build/cli.bundled.js:176852:12)
      at IncomingMessage.<anonymous> (/usr/local/lib/node_modules/truffle/build/cli.bundled.js:176812:24)
      at emitNone (events.js:91:20)
  

  I notice that pending gas limit of block(48985297) is greater than the gas limit definition in genesis block(4700000). So I increase the gas limit of genesis block from 0x47b760 to 0x2faf080, then rebuild the private chain.