Quote from: BlackHatCoiner on April 19, 2024, 10:41:26 AM

At this point, if you're still having trouble understanding what it does, we can continue the conversation, but note that I'm not a Sparrow contributor, so you'd be better asking themselves by opening an issue.

Thank you very much for your help.
The problem was that I reasoned like this: since Tor management interface settings are not in the Sparrow settings, then the interface is not used (spoiler: in fact, I was right).
It turns out that the developer " trying to avoid adding too much complexity to Whirlpool configuration" so much that the software tries to determine itself whether tor is running and whether management interface is configured. If it is possible to determine this and it is possible to log in, then the interface is used.
This attitude towards it is not surprising, because, it seems that the only purpose for which this interface is used is to obtain a new tor identity when the user has configurated tor proxy in the Sparrow settings, but the connection does not work in principle.
I think you’ve already read yourself that during the coinjoin process, tor identity is not changed, and establishing a new connection does not give anything for privacy.

The same thing happens with Wasabi. Wasabi uses a management interface, but does not change tor identity during the coinjoin process (at least in practice this is absolutely accurate. Anyone can verify this using the way I tested it)

Those. Both of these services are not blinded and can track the chain of your mixes.

Samourai (and, accordingly, Sparrow) are introducing a new feature - Soroban network. As far as i can understand, the network will be built on Ronin Dojo nodes and the connection between the coinjoin participants and the coordinator will pass through these nodes and during the coinjoin the participant’s identity will change.
My knowledge, unfortunately, is not enough to study the Soroban code. This could probably be cool. On the other hand, given that the Samourai developers are not concerned about user security today and if they were unable to configure the correct operation of coinjoin through tor, perhaps they also implement privacy in Soroban ass-backward.

Plus, it turns out that Samourai uses some other features to link user inputs and outputs. As Kruw wrote above when synchronizing inputs:
"- A coinjoin participant shares their input address and output address in the coinjoin with Samourai when syncing their wallet's xpub"

In total, after studying the topic, i can conclude that of all similar services (Samourai, Wasabi, JoinMarket), only JoinMarket looks honest and reliable. There is no coordinator at all and the coinjoin transaction is formed by the one who pays for the coinjoin.
However, the problem with Join Market is the high price of the mix due to the fact that you have to pay mining fees for all participants every time.