Zcash’s proposed NU7 upgrade would freeze access to funds stored in Sprout, its oldest privacy pool, with approximately 22,309 ZEC held as of October 17. Improvement proposal ZIP 2003 specifies rejecting version 4 transactions from NU7 onward, preventing holders from moving funds even with intact private keys. The mainnet activation decision is scheduled for October 20, with November 5 as a conditional target date. Fund recovery requires a full blockchain scan and exposes amounts during migration to the newer Sapling shielded pool.
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