Zero v29
Zero release 29, built from commit 7e1b37dfd0ed460474d05ddbf72f78a1880090bc. Changes Added zebra: per-check timers for transaction verification. The checks phase of zebra_consensus_transaction_duration_seconds was one timer around every script, signature and proof check and their waits on the shared batch verifiers, so the largest cost in block verification could not be attributed.
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Zero
Enterprise Zcash infrastructure, supported by Shielded Labs. Zero is a supported suite of open-source Zcash infrastructure software maintained by Shielded Labs for enterprise use. It helps exchanges, mining pools, wallet providers, and other ecosystem partners deploy and operate Zcash infrastructure successfully as the network prepares for Ironwood and future upgrades.
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ShieldedLabs/zero
Enterprise Zcash infrastructure, supported by Shielded Labs. Zero is a supported suite of open-source Zcash infrastructure software maintained by Shielded Labs for enterprise use. It helps exchanges, mining pools, wallet providers, and other ecosystem partners deploy and operate Zcash infrastructure successfully as the network prepares for Ironwood and future upgrades.
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Zero v28
Zero release 28, built from commit 94db84244f293c0864f4c4d71d0afd8adeb07724. Changes Fixed zcashd: the mainnet end-of-service halt moves from block 3,471,448 (~2026-09-04) to 3,527,448 (~2026-10-23), with the shutdown warning from block 3,511,320 (~2026-10-08). Every release from v20 through v27 embedded the v20 release height, so all of them halt at 3,471,448; there is no runtime override, only a new binary moves it. Testnet and regtest are not affected.
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Zero v27
Zero release 27, built from commit 35da11724b2942876d97fb9d4d7a5968505dcdfa. Changes Performance Zebra block verification reuses transparent script verification from mempool admission (#45): a transaction verified on entry to the mempool skips the interpreter, ZIP-244 sighash, and signature checks when the block that mines it is verified, keyed by WtxId so an authorizing-data twin misses. Zebra block-path UTXO lookups overlap up to 64-way instead of awaiting one state round trip per input (#46).