The Bitcoin Core 32.0 update, which focuses on performance and security, is scheduled for a stable release on October 10. The first release candidate was tagged on September 14. This version does not alter Bitcoin consensus rules but introduces significant technical optimizations for node operators.
A key improvement is the parallel fetching of transaction inputs during block validation, which accelerates initial block downloads by up to 3x. Additionally, the software now includes a mempool-based fee estimation tool designed to suggest lower transaction fees during periods of low network congestion.
Security patches in version 32.0 address a command-execution vulnerability in the walletnotify feature affecting non-Windows systems, present since version 24.0. The update also fixes a memory-exhaustion issue within the web server component.
Developers should note that four RPC commands now default to PSBT version 2. This change may impact existing integrations, requiring updates to handle the new format. Exchanges and wallet providers are advised to test their systems against the release candidate before the October 10 launch.
