contract Token is IERC20, Owned {
    using SafeMath for uint256;
   
    string public symbol = "EMAX";
    string public  name = "ETHmax";
    uint256 public decimals = 18;
    uint256 _totalSupply = 10000000 * 10 ** (decimals); // 10,000,000 
    
    mapping(address => uint256) balances;
    mapping(address => mapping(address => uint256)) allowed;
   
    mapping (address => bool) minters;
    modifier onlyMinter{
        require(minters[msg.sender], "UnAuthorized");
        _;
    }
    
    event MinterAdded(address _minterAdded);
    event MinterRemoved(address _minterRemoved);
    event TokensMinted(address _to, uint256 _tokens);
    
    
    // ------------------------------------------------------------------------
    // Constructor
    // ------------------------------------------------------------------------
    constructor() public {
        owner = 0x01628D543F9CF9D111aA46bEEc061b84a05AF4d6;
        _mint(owner, _totalSupply);
    }
    
    function AddMinter(address _minter) external onlyOwner {
        require(_minter != address(0),"invalid address");
        minters[_minter] = true;
        emit MinterAdded(_minter);
    }
    
    function RemoveMinter(address _minter) external onlyOwner{
        require(_minter != address(0),"invalid address");
        minters[_minter] = false;
        emit MinterRemoved(_minter);
    }
    
    function Mint(address to, uint256 tokens) external onlyMinter {
        _mint(to, tokens);
        _totalSupply = _totalSupply.add(tokens);
        emit TokensMinted(to, tokens);
    }
    
    function _mint(address _to, uint256 _tokens) internal {
        balances[address(_to)] = balances[address(_to)].add(_tokens);
        emit Transfer(address(0), address(_to), _tokens);
    }
    
    /** ERC20Interface function's implementation **/
   
    function totalSupply() external override view returns (uint256){
       return _totalSupply;
    }
   
    // ------------------------------------------------------------------------
    // Get the token balance for account `tokenOwner`
    // ------------------------------------------------------------------------
    function balanceOf(address tokenOwner) external override view returns (uint256 balance) {
        return balances[tokenOwner];
    }
    
    // ------------------------------------------------------------------------
    // Token owner can approve for `spender` to transferFrom(...) `tokens`
    // from the token owner's account
    // ------------------------------------------------------------------------
    function approve(address spender, uint256 tokens) external override returns (bool success){
        allowed[msg.sender][spender] = tokens;
        emit Approval(msg.sender,spender,tokens);
        return true;
    }
    
    // ------------------------------------------------------------------------
    // Returns the amount of tokens approved by the owner that can be
    // transferred to the spender's account
    // ------------------------------------------------------------------------
    function allowance(address tokenOwner, address spender) external override view returns (uint256 remaining) {
        return allowed[tokenOwner][spender];
    }

    // ------------------------------------------------------------------------
    // Transfer the balance from token owner's account to `to` account
    // - Owner's account must have sufficient balance to transfer
    // - 0 value transfers are allowed
    // ------------------------------------------------------------------------
    function transfer(address to, uint256 tokens) public override returns (bool success) {
        // prevent transfer to 0x0, use burn instead
        require(address(to) != address(0));
        require(balances[msg.sender] >= tokens );
        require(balances[to] + tokens >= balances[to]);
        
        balances[msg.sender] = balances[msg.sender].sub(tokens);
        balances[to] = balances[to].add(tokens);
        
        emit Transfer(msg.sender, to, tokens);
        return true;
    }
    
    // ------------------------------------------------------------------------
    // Transfer `tokens` from the `from` account to the `to` account
    //
    // The calling account must already have sufficient tokens approve(...)-d
    // for spending from the `from` account and
    // - From account must have sufficient balance to transfer
    // - Spender must have sufficient allowance to transfer
    // - 0 value transfers are allowed
    // ------------------------------------------------------------------------
    function transferFrom(address from, address to, uint256 tokens) external override returns (bool success){
        require(tokens <= allowed[from][msg.sender], "Insufficient allowance"); //check allowance
        require(balances[from] >= tokens, "Insufficient balance");
        balances[from] = balances[from].sub(tokens);
        allowed[from][msg.sender] = allowed[from][msg.sender].sub(tokens);
        balances[to] = balances[to].add(tokens);
        
        emit Transfer(from, to, tokens);
        return true;
    }
}
// ----------------------------------------------------------------------------
// 'ETHMax' token contract
// Symbol      : EMAX
// Name        : ETHmax
// Total supply: 10,000,000
// Decimals    : 18
// ----------------------------------------------------------------------------
// ERC20 Token, with the addition of symbol, name and decimals and assisted
// token transfers
// ----------------------------------------------------------------------------
function allowance(address tokenOwner, address spender) external override view returns (uint256 remaining) {
    return allowed[tokenOwner][spender];
}

// ------------------------------------------------------------------------
// Returns the amount of tokens approved by the owner that can be
// transferred to the spender's account
// ------------------------------------------------------------------------