Nostr Web Client

Thanks for the clarification🫡 But this is still confusing. Wasn’t the original idea of the whirlpool to make the participating transactions indistinguishable?

Sure, somebody has to pay the fee, but I believe that it would be much more private if the service just pays the fee and spreads it over the participants (just like already does with the whirlpool commission…).

I thought the idea of the whole thing was to make all inputs and all outputs identical so that nobody (except you who knows the exact address) can figure out what went where. 🤷🏻‍♂️

Kruw 2y ago

You can make a coinjoin much more private than that. Wasabi improves the "all inputs and outputs are identical" structure of Whirlpool to allow private input consolidation within coinjoins, arbitrary amount payments, and elimination of non private change: https://mempool.space/tx/87d32a8756a5e3a3a366614994db1d6751205f81ad962e5382314f0fa613865f

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Discussion

Arkad 2y ago

Tradeoffs to the elimination of non-private change

https://github.com/zkSNACKs/WalletWasabi/issues/10462

I saw this problem since the first version of wasabi 2.0.

A coinjoin must be deterministic.

Kruw 2y ago

If it's fully deterministic using "greedy" amount decomposition every time, then an attacker could use that determinism as well to anticipate which values you claim as outputs (but not their specific addresses), which is why there's added client randomness. There's definitely still room for optimization though.