pragma solidity ^0.4.19;

  /**
   * @title  SafeMath
   * @dev  Math operations with safety checks that throw on error
   */
  library SafeMath {
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
      if (a == 0) {
        return 0;
      }
      uint256 c = a * b;
      assert(c / a == b);
      return c;
    }

    function div(uint256 a, uint256 b) internal pure returns (uint256) {
      // assert(b > 0); // Solidity automatically throws when dividing by 0
      uint256 c = a / b;
      // assert(a == b * c + a % b); // There is no case in which this doesn't hold
      return c;
    }

    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
      assert(b <= a);
      return a - b;
    }

    function add(uint256 a, uint256 b) internal pure returns (uint256) {
      uint256 c = a + b;
      assert(c >= a);
      return c;
    }
  }
  /**
   * @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;


    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);


    /**
     * @dev  The Ownable constructor sets the original `owner` of the contract to the sender
     * account.
     */
    function Ownable() public {
      owner = msg.sender;
    }

    /**
     * @dev  Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
      require(msg.sender == owner);
      _;
    }

    /**
     * @dev  Allows the current owner to transfer control of the contract to a newOwner.
     * @param  newOwner The address to transfer ownership to.
     */
    function transferOwnership(address newOwner) public onlyOwner {
      require(newOwner != address(0));
      emit OwnershipTransferred(owner, newOwner);
      owner = newOwner;
    }

  }
  /**
   * @title  ERC20Basic
   * @dev  Simpler version of ERC20 interface
   * @dev  see https://github.com/ethereum/EIPs/issues/179
   */
  contract ERC20Basic {
      /// Total amount of tokens
    uint256 public totalSupply;
    
    function balanceOf(address _owner) public view returns (uint256 balance);
    
    function transfer(address _to, uint256 _amount) public returns (bool success);
    
    event Transfer(address indexed from, address indexed to, uint256 value);
  }

  /**
   * @title  ERC20 interface
   * @dev  see https://github.com/ethereum/EIPs/issues/20
   */
  contract ERC20 is ERC20Basic {
    function allowance(address _owner, address _spender) public view returns (uint256 remaining);
    
    function transferFrom(address _from, address _to, uint256 _amount) public returns (bool success);
    
    function approve(address _spender, uint256 _amount) public returns (bool success);
    
    event Approval(address indexed owner, address indexed spender, uint256 value);
  }

  /**
   * @title  Basic token
   * @dev  Basic version of StandardToken, with no allowances.
   */
  contract BasicToken is ERC20Basic {
    using SafeMath for uint256;
    uint balanceOfParticipant;
    uint lockedAmount;
    uint allowedAmount;
    //balance in each address account
    mapping(address => uint256) balances;
    struct Lockup
    {
        uint256 lockupTime;
        uint256 lockupAmount;
    }
    Lockup lockup;
    mapping(address=>Lockup) lockupParticipants;  
    /**
    * @dev  transfer token for a specified address
    * @param  _to The address to transfer to.
    * @param  _amount The amount to be transferred.
    */
    function transfer(address _to, uint256 _amount) public returns (bool success) {
      require(_to != address(0));
      require(balances[msg.sender] >= _amount && _amount > 0
          && balances[_to].add(_amount) > balances[_to]);

       if (lockupParticipants[msg.sender].lockupAmount>0)
      {
          uint timePassed = now - lockupParticipants[msg.sender].lockupTime;
          //12 months have passed
          if (timePassed <92 days)
          {
              //only 5% amount is unlocked
              balanceOfParticipant = balances[msg.sender];
              lockedAmount = lockupParticipants[msg.sender].lockupAmount;
              allowedAmount = lockedAmount.mul(5).div(100);
              require(balanceOfParticipant.sub(_amount)>=lockedAmount.sub(allowedAmount));
          }
          //3 months have passed
          else if (timePassed >= 92 days && timePassed < 183 days)
          {
              //upto 30% amount is unlocked
              balanceOfParticipant = balances[msg.sender];
              lockedAmount = lockupParticipants[msg.sender].lockupAmount;
              allowedAmount = lockedAmount.mul(30).div(100);
              require(balanceOfParticipant.sub(_amount)>=lockedAmount.sub(allowedAmount));
          
          }
           //6 months have passed
          else if (timePassed >= 183 days && timePassed < 365 days)
          {
              //upto 55% amount is unlocked
              balanceOfParticipant = balances[msg.sender];
              lockedAmount = lockupParticipants[msg.sender].lockupAmount;
              allowedAmount = lockedAmount.mul(55).div(100);
              require(balanceOfParticipant.sub(_amount)>=lockedAmount.sub(allowedAmount));
          }
          else if (timePassed > 365 days)
          {
              //do nothing, any amount is allowed -- all amount has been unlocked
          }
      }
      // SafeMath.sub will throw if there is not enough balance.
      balances[msg.sender] = balances[msg.sender].sub(_amount);
      balances[_to] = balances[_to].add(_amount);
      emit Transfer(msg.sender, _to, _amount);
      return true;
    }

    /**
    * @dev  Gets the balance of the specified address.
    * @param  _owner The address to query the the balance of.
    * @return  An uint256 representing the amount owned by the passed address.
    */
    function balanceOf(address _owner) public view returns (uint256 balance) {
      return balances[_owner];
    }

  }

  /**
   * @title  Standard ERC20 token
   *
   * @dev  Implementation of the basic standard token.
   * @dev  https://github.com/ethereum/EIPs/issues/20
   */
  contract StandardToken is ERC20, BasicToken {
    
    
    mapping (address => mapping (address => uint256)) internal allowed;


    /**
     * @dev  Transfer tokens from one address to another
     * @param  _from address The address which you want to send tokens from
     * @param  _to address The address which you want to transfer to
     * @param  _amount uint256 the amount of tokens to be transferred
     */
    function transferFrom(address _from, address _to, uint256 _amount) public returns (bool success) {
      require(_to != address(0));
      require(balances[_from] >= _amount);
      require(allowed[_from][msg.sender] >= _amount);
      require(_amount > 0 && balances[_to].add(_amount) > balances[_to]);
      if (lockupParticipants[_from].lockupAmount>0)
      {
          uint timePassed = now - lockupParticipants[_from].lockupTime;
          //12 months have passed
          if (timePassed <92 days)
          {
              //only 5% amount is unlocked
              balanceOfParticipant = balances[_from];
              lockedAmount = lockupParticipants[_from].lockupAmount;
              allowedAmount = lockedAmount.mul(5).div(100);
              require(balanceOfParticipant.sub(_amount)>=lockedAmount.sub(allowedAmount));
          }
          //3 months have passed
          else if (timePassed >= 92 days && timePassed < 183 days)
          {
              //upto 30% amount is unlocked
              balanceOfParticipant = balances[_from];
              lockedAmount = lockupParticipants[_from].lockupAmount;
              allowedAmount = lockedAmount.mul(30).div(100);
              require(balanceOfParticipant.sub(_amount)>=lockedAmount.sub(allowedAmount));
          
          }
           //6 months have passed
          else if (timePassed >= 183 days && timePassed < 365 days)
          {
              //upto 55% amount is unlocked
              balanceOfParticipant = balances[_from];
              lockedAmount = lockupParticipants[_from].lockupAmount;
              allowedAmount = lockedAmount.mul(55).div(100);
              require(balanceOfParticipant.sub(_amount)>=lockedAmount.sub(allowedAmount));
          }
          else if (timePassed > 365 days)
          {
              //do nothing, any amount is allowed -- all amount has been unlocked
          }
      }
      balances[_from] = balances[_from].sub(_amount);
      balances[_to] = balances[_to].add(_amount);
      allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_amount);
      emit Transfer(_from, _to, _amount);
      return true;
    }

    /**
     * @dev  Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
     *
     * Beware that changing an allowance with this method brings the risk that someone may use both the old
     * and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
     * race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     * @param  _spender The address which will spend the funds.
     * @param  _amount The amount of tokens to be spent.
     */
    function approve(address _spender, uint256 _amount) public returns (bool success) {
      allowed[msg.sender][_spender] = _amount;
      emit Approval(msg.sender, _spender, _amount);
      return true;
    }

    /**
     * @dev  Function to check the amount of tokens that an owner allowed to a spender.
     * @param  _owner address The address which owns the funds.
     * @param  _spender address The address which will spend the funds.
     * @return  A uint256 specifying the amount of tokens still available for the spender.
     */
    function allowance(address _owner, address _spender) public view returns (uint256 remaining) {
      return allowed[_owner][_spender];
    }

  }

  /**
   * @title  Burnable Token
   * @dev  Token that can be irreversibly burned (destroyed).
   */
  contract BurnableToken is StandardToken, Ownable {

      event Burn(address indexed burner, uint256 value);

      /**
       * @dev  Burns a specific amount of tokens.
       * @param  _value The amount of token to be burned.
       */
      function burn(uint256 _value) public onlyOwner{
          require(_value <= balances[msg.sender]);
          // no need to require value <= totalSupply, since that would imply the
          // sender's balance is greater than the totalSupply, which *should* be an assertion failure

          balances[msg.sender] = balances[msg.sender].sub(_value);
          totalSupply = totalSupply.sub(_value);
          emit Burn(msg.sender, _value);
      }
  }
  /**
   * @title  PVC Token
   * @dev  Token representing PVC.
   */
   contract PVCToken is BurnableToken {
       string public name ;
       string public symbol ;
       uint8 public decimals = 18 ;
       
       /**
       *@dev  users sending ether to this contract will be reverted. Any ether sent to the contract will be sent back to the caller
       */
       function ()public payable {
           revert();
       }
       
       /**
       * @dev  Constructor function to initialize the initial supply of token to the creator of the contract
       */
       function PVCToken(address wallet) public {
           owner = wallet;
           totalSupply = uint(50000000).mul( 10 ** uint256(decimals)); //Update total supply with the decimal amount
           name = "Pryvate";
           symbol = "PVC";
           balances[wallet] = totalSupply;
           
           //Emitting transfer event since assigning all tokens to the creator also corresponds to the transfer of tokens to the creator
           emit Transfer(address(0), msg.sender, totalSupply);
       }
       
       /**
       *@dev  helper method to get token details, name, symbol and totalSupply in one go
       */
      function getTokenDetail() public view returns (string, string, uint256) {
        return (name, symbol, totalSupply);
      }

      function teamVesting(address[] teamMembers, uint[] tokens) public onlyOwner
       {
           require(teamMembers.length == tokens.length);
           for (uint i=0;i= tokens[i] && tokens[i] > 0
              && balances[teamMembers[i]].add(tokens[i]) > balances[teamMembers[i]]);

              // SafeMath.sub will throw if there is not enough balance.
              balances[owner] = balances[owner].sub(tokens[i]);
              balances[teamMembers[i]] = balances[teamMembers[i]].add(tokens[i]);
              emit Transfer(owner, teamMembers[i], tokens[i]);
              lockup = Lockup({lockupTime:now,lockupAmount:tokens[i]});
              lockupParticipants[teamMembers[i]] = lockup;
           }
       }
       
       function advisorVesting(address[] advisors, uint[] tokens) public onlyOwner
       {
           require(advisors.length == tokens.length);
           for (uint i=0;i= tokens[i] && tokens[i] > 0
              && balances[advisors[i]].add(tokens[i]) > balances[advisors[i]]);

              // SafeMath.sub will throw if there is not enough balance.
              balances[owner] = balances[owner].sub(tokens[i]);
              balances[advisors[i]] = balances[advisors[i]].add(tokens[i]);
              emit Transfer(owner, advisors[i], tokens[i]);
              lockup = Lockup({lockupTime:now,lockupAmount:tokens[i]});
              lockupParticipants[advisors[i]] = lockup;
           }
       }
   }