a self.eta error in TCO

[GXY2017]

I don't know where does this int 10 come from, guess should be self.eta which default value is 10 ?

    def update_tco(self, x: npt.NDArray, b: npt.NDArray, x_pred: npt.NDArray):
        """
        :param x: ratio of change in price
        """
        lambd = 10 * self.trx_fee_pct  # SHOUD BE   self.eta * self.trx_fee_pct  ?

        # last price adjusted weights
        updated_b = np.multiply(b, x) / np.dot(b, x)