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Deep Tide TechFlow News, April 21 — Bitcoin Core officially announced that Bitcoin Core v31.0 has been officially released. This version introduces multiple underlying updates and improvements, mainly including: GUI interface framework updated to Qt 6.8; for systems with more than 4GB of memory, the default database cache has increased from 450 MiB to 1024 MiB; added -privatebroadcast to support private broadcasting behavior. Additionally, to prevent fee calculation errors, the static fee setting option -paytxfee has been completely removed; users will now rely on automatic fee estimation or specify a per-transaction fee rate. At the same time, the new version implements privacy and security filtering for commands used during wallet recovery and migration.