pragma solidity ^0.4.11;



/**

* @author Jefferson Davis

* HashRuchICO.sol creates the client's token for crowdsale and allows for subsequent token sales and minting of tokens

*   Crowdsale contracts edited from original contract code at https://www.ethereum.org/crowdsale#crowdfund-your-idea

*   Additional crowdsale contracts, functions, libraries from OpenZeppelin

*       at https://github.com/OpenZeppelin/zeppelin-solidity/tree/master/contracts/token

*   Token contract edited from original contract code at https://www.ethereum.org/token

*   ERC20 interface and certain token functions adapted from https://github.com/ConsenSys/Tokens

**/



contract ERC20 {

    //Sets events and functions for ERC20 token

    event Approval(address indexed _owner, address indexed _spender, uint _value);

    event Transfer(address indexed _from, address indexed _to, uint _value);

    

    function allowance(address _owner, address _spender) constant returns (uint remaining);

    function approve(address _spender, uint _value) returns (bool success);

    function balanceOf(address _owner) constant returns (uint balance);

    function transfer(address _to, uint _value) returns (bool success);

    function transferFrom(address _from, address _to, uint _value) returns (bool success);

}





contract Owned {

    //Public variable

    address public owner;



    //Sets contract creator as the owner

    function Owned() {

        owner = msg.sender;

    }

    

    //Sets onlyOwner modifier for specified functions

    modifier onlyOwner {

        require(msg.sender == owner);

        _;

    }



    //Allows for transfer of contract ownership

    function transferOwnership(address newOwner) onlyOwner {

        owner = newOwner;

    }

}





library SafeMath {

    function add(uint256 a, uint256 b) internal returns (uint256) {

        uint256 c = a + b;

        assert(c >= a);

        return c;

    }  



    function div(uint256 a, uint256 b) internal 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 max64(uint64 a, uint64 b) internal constant returns (uint64) {

        return a >= b ? a : b;

    }



    function max256(uint256 a, uint256 b) internal constant returns (uint256) {

        return a >= b ? a : b;

    }



    function min64(uint64 a, uint64 b) internal constant returns (uint64) {

        return a < b ? a : b;

    }



    function min256(uint256 a, uint256 b) internal constant returns (uint256) {

        return a < b ? a : b;

    }

  

    function mul(uint256 a, uint256 b) internal returns (uint256) {

        uint256 c = a * b;

        assert(a == 0 || c / a == b);

        return c;

    }



    function sub(uint256 a, uint256 b) internal returns (uint256) {

        assert(b <= a);

        return a - b;

    }

}





contract HashRush is ERC20, Owned {

    //Applies SafeMath library to uint256 operations 

    using SafeMath for uint256;



    //Public variables

    string public name; 

    string public symbol; 

    uint256 public decimals;  

    uint256 public totalSupply; 



    //Variables

    uint256 multiplier; 

    

    //Creates arrays for balances

    mapping (address => uint256) balance;

    mapping (address => mapping (address => uint256)) allowed;



    //Creates modifier to prevent short address attack

    modifier onlyPayloadSize(uint size) {

        if(msg.data.length < size + 4) revert();

        _;

    }



    //Constructor

    function HashRush(string tokenName, string tokenSymbol, uint8 decimalUnits, uint256 decimalMultiplier) {

        name = tokenName; 

        symbol = tokenSymbol; 

        decimals = decimalUnits; 

        multiplier = decimalMultiplier;  

    }

    

    //Provides the remaining balance of approved tokens from function approve 

    function allowance(address _owner, address _spender) constant returns (uint256 remaining) {

      return allowed[_owner][_spender];

    }



    //Allows for a certain amount of tokens to be spent on behalf of the account owner

    function approve(address _spender, uint256 _value) returns (bool success) { 

        allowed[msg.sender][_spender] = _value;

        Approval(msg.sender, _spender, _value);

        return true;

    }



    //Returns the account balance 

    function balanceOf(address _owner) constant returns (uint256 remainingBalance) {

        return balance[_owner];

    }



    //Allows contract owner to mint new tokens, prevents numerical overflow

    function mintToken(address target, uint256 mintedAmount) onlyOwner returns (bool success) {

        require(mintedAmount > 0); 

        uint256 addTokens = mintedAmount; 

        balance[target] += addTokens;

        totalSupply += addTokens;

        Transfer(0, target, addTokens);

        return true; 

    }



    //Sends tokens from sender's account

    function transfer(address _to, uint256 _value) onlyPayloadSize(2 * 32) returns (bool success) {

        if ((balance[msg.sender] >= _value) && (balance[_to] + _value > balance[_to])) {

            balance[msg.sender] -= _value;

            balance[_to] += _value;

            Transfer(msg.sender, _to, _value);

            return true;

        } else { 

            return false; 

        }

    }

    

    //Transfers tokens from an approved account 

    function transferFrom(address _from, address _to, uint256 _value) onlyPayloadSize(3 * 32) returns (bool success) {

        if ((balance[_from] >= _value) && (allowed[_from][msg.sender] >= _value) && (balance[_to] + _value > balance[_to])) {

            balance[_to] += _value;

            balance[_from] -= _value;

            allowed[_from][msg.sender] -= _value;

            Transfer(_from, _to, _value);

            return true;

        } else { 

            return false; 

        }

    }

}





contract HashRushICO is Owned, HashRush {

    //Applies SafeMath library to uint256 operations 

    using SafeMath for uint256;



    //Public Variables

    address public multiSigWallet;                  

    uint256 public amountRaised; 

    uint256 public startTime; 

    uint256 public stopTime; 

    uint256 public hardcap; 

    uint256 public price;                            



    //Variables

    bool crowdsaleClosed = true;                    

    string tokenName = "HashRush"; 

    string tokenSymbol = "RC"; 

    uint256 multiplier = 100000000; 

    uint8 decimalUnits = 8;  



    



    //Initializes the token

    function HashRushICO() 

        HashRush(tokenName, tokenSymbol, decimalUnits, multiplier) {  

            multiSigWallet = msg.sender;        

            hardcap = 70000000;    

            hardcap = hardcap.mul(multiplier); 

    }



    //Fallback function creates tokens and sends to investor when crowdsale is open

    function () payable {

        require(!crowdsaleClosed 

            && (now < stopTime) 

            && (totalSupply.add(msg.value.mul(getPrice()).mul(multiplier).div(1 ether)) <= hardcap)); 

        address recipient = msg.sender; 

        amountRaised = amountRaised.add(msg.value.div(1 ether)); 

        uint256 tokens = msg.value.mul(getPrice()).mul(multiplier).div(1 ether);

        totalSupply = totalSupply.add(tokens);

        balance[recipient] = balance[recipient].add(tokens);

        require(multiSigWallet.send(msg.value)); 

        Transfer(0, recipient, tokens);

    }   



    //Returns the current price of the token for the crowdsale

    function getPrice() returns (uint256 result) {

        return price;

    }



    //Returns time remaining on crowdsale

    function getRemainingTime() constant returns (uint256) {

        return stopTime; 

    }



    //Set the sale hardcap amount

    function setHardCapValue(uint256 newHardcap) onlyOwner returns (bool success) {

        hardcap = newHardcap.mul(multiplier); 

        return true; 

    }



    //Sets the multisig wallet for a crowdsale

    function setMultiSigWallet(address wallet) onlyOwner returns (bool success) {

        multiSigWallet = wallet; 

        return true; 

    }



    //Sets the token price 

    function setPrice(uint256 newPriceperEther) onlyOwner returns (uint256) {

        require(newPriceperEther > 0);  

        price = newPriceperEther; 

        return price; 

    }



    //Allows owner to start the crowdsale from the time of execution until a specified stopTime

    function startSale(uint256 saleStart, uint256 saleStop, uint256 salePrice, address setBeneficiary) onlyOwner returns (bool success) {

        require(saleStop > now);     

        //startTime = 1502881261; // 16 August 2017, 11:01 AM GMT 

        //stopTime = 1504263601;  // 1 September 2017, 11:00 AM GMT

        startTime = saleStart; 

        stopTime = saleStop; 

        crowdsaleClosed = false; 

        setPrice(salePrice); 

        setMultiSigWallet(setBeneficiary); 

        return true; 

    }



    //Allows owner to stop the crowdsale immediately

    function stopSale() onlyOwner returns (bool success) {

        stopTime = now; 

        crowdsaleClosed = true;

        return true; 

    }

}