cpopov

const DevCoinAbstraction = artifacts.require('DevCoin')
const ExchangeAbstraction = artifacts.require('Exchange')
const BigNumber = require('bignumber.js')
const expect = require('chai').expect

contract('Exchange', function (accounts) {
  let tokenContract
  let exchangeContract
  const creatorAccount = accounts[0]
  const userAccount = accounts[1]

cpopov

/**
*  Smart contract enabling funding and exchanging of DevCoin.
*  The rate is defined by the owner of the contract, but it will never be less than ICO price.
*  The price of token in ETH is 1/rate. Eg for 1 Eth the sender will get rate number of tokens.
*/
contract Exchange {
  using SafeMath for uint256;

  address public owner;
  uint public creationTime = now;