ZcashFoundation/zebra v4.2.0

Zebra 4.2.0

on GitHub

Zebra 4.2.0 - 2026-03-12

This release expands Zebra’s RPC functionality, improves mempool policy,
adds more state querying capabilities, and replaces the legacy OpenAPI
documentation with OpenRPC.

Added

• UnspentOutput request to mempool component service (#10235)
• Founders reward addresses (#10188)
• Support for pre-Canopy block subsidies (#10191)
• AI contribution policy and agent guidance files (#10318)
• rpc.discover endpoint (#10201)
• gettxout RPC method (#10235)
• AnyChainBlock state request for querying blocks in side chains (#10325)
• Remaining non-standard mempool transaction filters (#10314)

Removed

• Python QA RPC test framework (zebra-rpc/qa/) in favour of the new integration-tests project, which captures all previous work in zcash/integration-tests#1 (#10363)
• OpenAPI specification and related functionality (#10298) in favour of OpenRPC

Changed

• Simplify ReadStateService::call() method (#10335)
• Replace NETWORK_UPGRADES_IN_ORDER with strum::EnumIter (#10096)

Fixed

• Preserve input order in spent_outputs for mixed chain/mempool transactions (#10356)
• Clarify TransparentInputNotFound error message (#10302)
• Improve getrawtransaction compatibility with zcashd (#10307)
• Peerset banned cancel handles (#10258)
• Support writing non-finalized state backups to disk before broadcasting updated chainstate (#10361)
• Fix bug in ActiveConnectionCounter and inaccurate connection count metrics (#10311)

Contributors

Thank you to everyone who contributed to this release, we couldn't make Zebra without you:
@VolodymyrBg, @arya2, @conradoplg, @gustavovalverde, @mpguerra, @oxarbitrage, @syszery, @upbqdn and @zmanian