Merchants using BTCPay Server will now be able to protect their privacy using Wasabi Wallet’s CoinJoin coordination protocol.
Bitcoin payment processing software, BTCPay Server, added a CoinJoin plugin for its merchants, allowing them to retain privacy while running their stores. Stores that activate the Wasabi Wallet-based WabiSabi CoinJoin coordination protocol will be able to automatically match all the bitcoins they receive.
CoinJoin is when two or more people combine their transactions into one transaction, in such a way that it is not clear who owns which coin after the transaction.
The plugin, developed by Andres Camilleri, also offers payment batching in the CoinJoin feature, allowing users to pay for addresses directly within a CoinJoin transaction. This will save block space and improve privacy compared to making a two-step payment, the press release sent to Bitcoin Magazine states.
The BTCPay Server plugin also includes a coin selection interface that allows merchants to spend their coins based on the anonymity scores obtained. By using the WabiSabi CoinJoin protocol, merchants can make arbitrary amount CoinJoins instead of fixed denomination CoinJoins, reducing the amount of non-private change users receive and making payments within CoinJoin possible.
“BTCPay Server is the most sophisticated merchant payment processing software for bitcoin. It made sense to include an optional CoinJoin plugin with the most sophisticated privacy enhancement tool for Bitcoin,” said Max Hillebrand, Wasabi Wallet Contributor and CEO of zkSNACKs . Users can access a dashboard to assess the privacy level of their wallets and the details of the current CoinJoin transaction they are participating in, and gain additional insight and control with coin selection in and out of CoinJoin transactions.
All BTCPay Server merchants can now use the new CoinJoin feature. They can choose to CoinJoin for a fee with a coordinator provided by zkSNACKs, and all BTCPay Server admins can activate their own CoinJoin coordinators using their own terms, built on Wasabi Wallet’s WabiSabi CoinJoin protocol. If users run their own coordinator, the BTCPay server plugin also offers an optional revenue sharing feature that donates a percentage of profits to the HRF and OpenSats foundations.
