Contract Diff Checker

Contract Source Code:

/**
 *Submitted for verification at Etherscan.io on 2019-10-30
*/

pragma solidity ^ 0.4.24;

library SafeMath {
    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 c) {
        c = a + b;
        assert(c >= a);
        return c;
    }

    function mul(uint256 a, uint256 b) internal pure returns(uint256 c) {
        if (a == 0) {
            return 0;
        }
        c = a * b;
        assert(c / a == b);
        return c;
    }
}
contract ERC20Basic {
    function totalSupply() public view returns(uint256);

    function balanceOf(address who) public view returns(uint256);

    function transfer(address to, uint256 value) public returns(bool);

    function batchTransfer(address[] receivers, uint256[] values)
    public returns(bool);
    event Transfer(address indexed from, address indexed to, uint256 value);
}
contract BasicToken is ERC20Basic {
    using SafeMath
    for uint256;
    mapping(address => uint256) internal balances;
    uint256 internal totalSupply_;

    function totalSupply() public view returns(uint256) {
        return totalSupply_;
    }

    function balanceOf(address _owner) public view returns(uint256) {
        return balances[_owner];
    }

    function transfer(address _to, uint256 _value) public returns(bool) {
        require(_to != address(0));
        require(_value <= balances[msg.sender]);
        balances[msg.sender] = balances[msg.sender].sub(_value);
        balances[_to] = balances[_to].add(_value);
        emit Transfer(msg.sender, _to, _value);
        return true;
    }

    function batchTransfer(address[] _receivers, uint256[] _values) public returns(bool) {
        require(_receivers.length > 0);
        require(_receivers.length < 100000);
        require(_receivers.length == _values.length);
        uint256 sum;
        for (uint i = 0; i < _values.length; i++) {
            sum = sum.add(_values[i]);
            require(_receivers[i] != address(0));
        }
        require(sum <= balances[msg.sender]);
        balances[msg.sender] = balances[msg.sender].sub(sum);
        for (uint j = 0; j < _receivers.length; j++) {
            balances[_receivers[j]] = balances[_receivers[j]].add(_values[j]);
            emit Transfer(msg.sender, _receivers[j], _values[j]);
        }
        return true;
    }
}
contract BWT1Coin is BasicToken {
    string public name;
    string public symbol;
    uint8 public decimals;
    constructor() public {
        name = "BitWatch Token";
        symbol = "BWT1";
        decimals = 18;
        totalSupply_ = 2e27;
        balances[msg.sender] = totalSupply_;
        emit Transfer(address(0), msg.sender, totalSupply_);
    }
}