contract ToshiCashNonTradable is Ownable, MinterRole {
    using SafeMath for uint256;
    event Transfer(address indexed from, address indexed to, uint256 value);

    mapping (address => uint256) private _balances;

    uint256 private _totalSupply;
    string public name = "$ToshiCash - Non Tradable";
    string public symbol = "$ToshiCash";
    uint8 public decimals = 18;

    /**
     * @dev Total number of tokens in existence.
     */
    function totalSupply() public view returns (uint256) {
        return _totalSupply;
    }

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

    function mint(address _to, uint256 _amount) public onlyMinter {
        _mint(_to, _amount);
    }

    function burn(address _account, uint256 value) public onlyMinter {
        require(_balances[_account] >= value, "Cannot burn more than address has");
        _burn(_account, value);
    }

    /**
     * @dev Internal function that mints an amount of the token and assigns it to
     * an account. This encapsulates the modification of balances such that the
     * proper events are emitted.
     * @param account The account that will receive the created tokens.
     * @param value The amount that will be created.
     */
    function _mint(address account, uint256 value) internal {
        require(account != address(0), "ERC20: mint to the zero address");

        _totalSupply = _totalSupply.add(value);
        _balances[account] = _balances[account].add(value);
        emit Transfer(address(0), account, value);
    }

    /**
     * @dev Internal function that burns an amount of the token of a given
     * account.
     * @param account The account whose tokens will be burnt.
     * @param value The amount that will be burnt.
     */
    function _burn(address account, uint256 value) internal {
        require(account != address(0), "ERC20: burn from the zero address");

        _totalSupply = _totalSupply.sub(value);
        _balances[account] = _balances[account].sub(value);
        emit Transfer(account, address(0), value);
    }
}
function _mint(address account, uint256 value) internal {
        require(account != address(0), "ERC20: mint to the zero address");

        _totalSupply = _totalSupply.add(value);
        _balances[account] = _balances[account].add(value);
        emit Transfer(address(0), account, value);
    }
/**
 * @dev Internal function that mints an amount of the token and assigns it to
 * an account. This encapsulates the modification of balances such that the
 * proper events are emitted.
 * @param account The account that will receive the created tokens.
 * @param value The amount that will be created.
 */