A few SDN-stated pools even now have an “operator” authorization. Of these, two belong to very previous, now-unused versions of Tornado Cash. The remaining swimming pools possibly have newer, immutable variations, or were being used so minimal which they were being likely forgotten over the May perhaps 2020 closing update. https://huohuvip526.com/how-tornado-cash-enhances-privacy-for-ethereum-and-bnb-transactions/