TechFlow reports that on April 21, Bitcoin Core officially announced the release of Bitcoin Core v31.0. This version introduces several underlying updates and improvements, primarily including: upgrading the GUI framework to Qt 6.8; increasing the default database cache from 450 MiB to 1024 MiB for systems with more than 4 GB of RAM; and adding support for the -privatebroadcast option to enable private transaction broadcasting. Additionally, to prevent fee estimation errors, the -paytxfee startup option—which previously allowed setting a static transaction fee—has been completely removed; users must now rely on automatic fee estimation or specify a fee rate per transaction. Furthermore, the new version applies privacy and security filtering to commands used during wallet recovery and migration.
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