ChainCatcher news, Bitcoin Core developer Luke Dashjr posted on social media, "The discussion about OP_RETURN is not new; it dates back to 2014 when Bitcoin Core 0.9.0 was released, which included the OP_RETURN policy aimed at preventing more severe forms of spam. At that time, the default maximum data carrier size limit implemented by all nodes was 40 bytes; this has always been and remains sufficiently large for binding data to transactions (32 bytes for a hash, 8 bytes for a unique identifier). The subsequent increase of the default value to 80 bytes was a completely voluntary decision and in no way contradicts the design goal of OP_RETURN to create provably prunable outputs to minimize the damage caused by data storage schemes, which have always been considered abusive. There are also other good technical reasons why I choose to retain the lower default value of Bitcoin Knot, and there is no reason to increase it."Luke Dashjr stated that he and the OCEAN team have no intention of filtering coinjoin transactions. These provide an innovative tool for enhancing Bitcoin privacy, and when constructed correctly, coinjoins can easily stay within the OP_RETURN limit (in fact, they have no reason to have any OP_RETURN data at all). He has some personal ideas on how to mitigate the recent issues, namely that some coinjoin transactions were flagged as spam by Knots v25, and he is willing to leverage all his and his team's resources to sincerely collaborate on developing solutions.

ChainCatcher news, cryptocurrency hardware wallet company Trezor has expanded the privacy of Bitcoin transactions through a partnership with privacy-focused Wasabi Wallet. Trezor has launched a privacy-supporting CoinJoin feature on its hardware wallets, allowing users to enhance the privacy and security of their Bitcoin transactions.In an announcement on April 19, Trezor noted that this new feature will be enabled immediately on the company's Trezor Model T wallet. The company plans to enable the CoinJoin option for its first hardware wallet, Model One, in the near future.CoinJoin is a process for anonymous Bitcoin transactions that allows users to send their Bitcoins as part of a large collaborative transfer, obscuring the transaction history. This method was introduced by former Bitcoin Core developer Gregory Maxwell in August 2013, providing a more private option for sending Bitcoin transactions.Trezor's new collaboration with Wasabi makes the CoinJoin option on its wallets possible, allowing users to hide their transactions and balances when purchasing, donating, and using Bitcoin for other transactions. (source link)