PhABC

pragma solidity ^0.4.18;

/**
 * @title Ownable
 * @dev The Ownable contract has an owner address, and provides basic authorization control
 * functions, this simplifies the implementation of "user permissions".
 */

contract Ownable {
  address public owner;

PhABC

//Extracting ECDSA variables
var r = sign.substr(0, 66);
var s = '0x' + sign.substr(66, 64);
var v = '0x' + sign.substr(130,2);

PhABC

// Message to sign : contract address + address to give access
var message = web3.sha3(contractAddress.substr(2) + userAddress.substr(2), {encoding: 'hex'})

// Signing message (with "\x19Ethereum Signed Message:\n32" as prefix by default)
web3.personal.sign(message, web3.eth.defaultAccount, (err, res) => sign = res)

PhABC

// Addresses
var contractAddress = "0xContractAddress";
var userAddress = "0xUserAddress";

// Message to sign : contract address + address to give access
var message = web3.sha3(contractAddress.substr(2) + userAddress.substr(2), {encoding: 'hex'})

// Signing message (with "\x19Ethereum Signed Message:\n32" as prefix by default)
web3.personal.sign(message, web3.eth.defaultAccount, (err, res) => sign = res)

PhABC

pragma solidity ^0.4.18;

/**
 * @title Ownable
 * @dev The Ownable contract has an owner address, and provides basic authorization control
 * functions, this simplifies the implementation of "user permissions".
 */

contract Ownable {
  address public owner;

PhABC

const Web3 = require('web3');
const ZeroEx = require('0x.js').ZeroEx;
const BigNumber = require('bignumber.js');

// Default provider for TestRPC
const provider = new Web3.providers.HttpProvider('http://localhost:8545')

// Instantiate 0x.js instance
const zeroEx = new ZeroEx(provider);