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In this episode of Bitcoin, Explained, hosts Aaron van Wirdum and Sjors Provoost discuss Bitcoin Core 22.0, the latest major version of the Bitcoin Core software client, currently the de facto reference implementation of the Bitcoin protocol.
Van Wirdum and Provoost highlight several improvements to the Bitcoin Core software. The first is hardware wallet support in the Graphical User Interface (GUI).
While hardware wallet support has rolled out across many previous Bitcoin Core versions, it is now fully available in a GUI.
The second featured update is support for the Invisible Internet Project (I2P), an Internet privacy layer similar to that of Tor.
Van Werdum and Provost also briefly touch on the differences between I2P and Tor. The third upgrade discussed in the episode is Taproot support. While the Taproot activation logic is already built into Bitcoin Core 0.21.1, Bitcoin Core 22.0 is the first major version of Bitcoin Core ready to support Taproot when activated in November, and includes some basic Taproot functionality.
The fourth upgrade that Aaron and Sjors discuss is an update to the testmempoolaccept logic, which paves the way for a larger packet relay update. In a future release, this may allow transactions to be transmitted over the Bitcoin network in packets including many transactions at the same time.
In addition, Aaron and Sjors briefly discuss an extension for creating multisig, adding a multisig address, a new NAT-PMP option, and more.