So we can assume coordinator can link input-outputs for all the coinjoin transactions that were done before March 2024?
Yes, and I hope they have deleted the logs.
you can assume shit It was actually in the whirlpool client all along - it always used a different identity for output registration. https://github.com/Archive-Samourai-Wallet/whirlpool-client/blob/6eefd5b854110ad5758eb2b34be775ca44d867f5/src/main/java/com/samourai/whirlpool/client/whirlpool/ServerApi.java#L73
It is not used in the android app because it is computationally expensive, nor in sparrow. https://github.com/sparrowwallet/sparrow/issues/1328
Crickets