Is synonymous which has a core subset of the Tornado Cash smart contracts: the Tornado Cash pools. The vast majority of those contracts are immutable. That's, they've no capacity to be up-to-date or removed by any one. A complete listing of sanctioned, immutable Tornado Cash pools are available in Appendix https://jetdronetrip.com/the-ultimate-guide-to-tornado-cash-secure-and-anonymous-blockchain-transactions/