CoinLaunch Token Contract

gistfile1.txt

pragma solidity ^ 0.4.17;

/**
* @title CoinLaunch Token Only Contract
 * @dev Copyright CoinLaunch Corp
 * @note use for verification purposes more details at coinlaunch.market
 */
 
library SafeMath {

    function mul(uint a, uint b) internal pure returns(uint) {
        uint c = a * b;
        assert(a == 0 || c / a == b);
        return c;
    }

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

    function add(uint a, uint b) internal  pure returns(uint) {
        uint c = a + b;
        assert(c >= a && c >= b);
        return c;
    }
}


contract ERC20 {
    uint public totalSupply;

    function balanceOf(address who) public view returns(uint);

    function allowance(address owner, address spender) public view returns(uint);

    function transfer(address to, uint value) public returns(bool ok);

    function transferFrom(address from, address to, uint value) public returns(bool ok);

    function approve(address spender, uint value) public returns(bool ok);

    event Transfer(address indexed from, address indexed to, uint value);
    event Approval(address indexed owner, address indexed spender, uint value);
}


/**
 * @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));
        OwnershipTransferred(owner, newOwner);
        owner = newOwner;
    }

}


// Crowdsale Smart Contract 
// This smart contract collects ETH and in return sends  tokens to the Backers
contract DeployTokenContract is Ownable {
       
    address public commissionAddress;  // address to deposit commissions
    uint public deploymentCost;
    
    event TokenDeployed(address newToken, uint amountPaid);

    function DeployTokenContract(uint _deploymentCost, address _commissionAddress) public {

        require(_deploymentCost > 0);
        require(_commissionAddress != address(0));
        deploymentCost = _deploymentCost;
        commissionAddress = _commissionAddress;
    }

    function updateDeployomentCost(uint _newDeploymentCost) external onlyOwner() {
        require(_newDeploymentCost > 0);
        deploymentCost = _newDeploymentCost;
    }

    function deployToken(uint _initialSupply,
            string _tokenName,
            uint _decimalUnits,
            string _tokenSymbol,
            string _version
            ) public payable returns (address) {   

        require(msg.value == deploymentCost);                     
        Token token = new Token(_initialSupply, _tokenName, _decimalUnits, _tokenSymbol, _version, msg.sender);
        commissionAddress.transfer(msg.value); 
        TokenDeployed(token, msg.value);
        return token;                                                
    }
  
}


// The  token
contract Token is ERC20, Ownable {

    using SafeMath for uint;
    // Public variables of the token
    string public name;
    string public symbol;
    uint public decimals; // How many decimals to show.
    string public version;
    uint public totalSupply;
   
    mapping(address => uint) public balances;
    mapping(address => mapping(address => uint)) public allowed;

    modifier onlyAuthorized() {
        if (msg.sender != owner) 
            revert();
        _;
    }

    // The Token constructor     
    function Token(uint _initialSupply,
            string _tokenName,
            uint _decimalUnits,
            string _tokenSymbol,
            string _version,
            address _owner
            ) public {        
        totalSupply = _initialSupply * (10**_decimalUnits);     
                                        
        name = _tokenName; // Set the name for display purposes
        symbol = _tokenSymbol; // Set the symbol for display purposes
        decimals = _decimalUnits; // Amount of decimals for display purposes
        version = _version;
        
        transferOwnership(_owner);  // change owner from contract adress to the person deploying
              
        balances[owner] = totalSupply;
         
    }

    function burn(address _member, uint256 _value) public onlyAuthorized returns(bool) {
        require(balances[_member] >= _value);
        balances[_member] -= _value;
        totalSupply -= _value;
        Transfer(_member, 0x0, _value);
        return true;
    }
   
    // @notice transfer tokens to given address
    // @param _to {address} address or recipient
    // @param _value {uint} amount to transfer
    // @return  {bool} true if successful
    function transfer(address _to, uint _value) public returns(bool) {

        require(_to != address(0));
        require(balances[msg.sender] >= _value);
        balances[msg.sender] -= _value;
        balances[_to] += _value;
        Transfer(msg.sender, _to, _value);
        return true;
    }

    // @notice transfer tokens from given address to another address
    // @param _from {address} from whom tokens are transferred
    // @param _to {address} to whom tokens are transferred
    // @param _value {uint} amount of tokens to transfer
    // @return  {bool} true if successful
    function transferFrom(address _from, address _to, uint256 _value) public  returns(bool success) {

        require(_to != address(0));
        require(balances[_from] >= _value); // Check if the sender has enough
        require(_value <= allowed[_from][msg.sender]); // Check if allowed is greater or equal
        balances[_from] -= _value; // Subtract from the sender
        balances[_to] += _value; // Add the same to the recipient
        allowed[_from][msg.sender] -= _value;  // adjust allowed
        Transfer(_from, _to, _value);
        return true;
    }

      // @notice to query balance of account
    // @return _owner {address} address of user to query balance
    function balanceOf(address _owner) public view returns(uint balance) {
        return balances[_owner];
    }

    /**
    * @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 _value The amount of tokens to be spent.
    */
    function approve(address _spender, uint _value) public returns(bool) {
        allowed[msg.sender][_spender] = _value;
        Approval(msg.sender, _spender, _value);
        return true;
    }

    // @notice to query of allowance of one user to the other
    // @param _owner {address} of the owner of the account
    // @param _spender {address} of the spender of the account
    // @return remaining {uint} amount of remaining allowance
    function allowance(address _owner, address _spender) public view returns(uint remaining) {
        return allowed[_owner][_spender];
    }

    /**
    * approve should be called when allowed[_spender] == 0. To increment
    * allowed value is better to use this function to avoid 2 calls (and wait until
    * the first transaction is mined)
    * From MonolithDAO Token.sol
    */
    function increaseApproval (address _spender, uint _addedValue) public returns (bool success) {
        allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue);
        Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
        return true;
    }

    function decreaseApproval (address _spender, uint _subtractedValue) public returns (bool success) {
        uint oldValue = allowed[msg.sender][_spender];
        if (_subtractedValue > oldValue) {
            allowed[msg.sender][_spender] = 0;
        } else {
            allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
        }
        Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
        return true;
    }

}