[4.0.0] — 2026-03-21

Tag: v4.0.0 on branch zero-merge.

Full commit list: v3.3.12...v4.0.0

Highlights

• Integrates the zero-merge development line: build system refresh across Linux, macOS, and Windows, large documentation consolidation, Python 3-oriented RPC tests, and zeronode / wallet interface improvements.
• Windows: build-win.sh aligned with build.sh, MXE / BUILD_ZERO doc fixes, and Windows-focused build script fixes.
• Zeronode: wallet interface abstraction (real + stub), RPC and validation/error-handling improvements, and GCC 13+ build compatibility fixes.
• Tests: founders reward and transaction-size tests brought in line with implementation; broader test framework and RPC test updates.
• Docs: BUILD / BUILD_C11 / BUILD_ZERO reorg, TODO / test status updates, integration-testing notes.

Build

• New build script layout and build consistency.
• Ignore and packaging hygiene for artifacts/, bin/, debug/, release/ and release artifact handling.
• depends: fetch_file path quoting; Boost PTHREAD_STACK_MIN fix.
• Linux, Windows, and Mac build/test doc updates; Equihash / init / RPC glue fixes as part of the merge line.

Tests

• Migration of RPC tests to Python 3 with harness fixes.
• New and expanded tests; RPC test CSV / runner updates; “fix and run tests” passes across platforms.

Documentation

• Comprehensive BUILD documentation (including Windows); rename BUILD_COMPATIBILITY → BUILD_C11; comparison and cross-link cleanup.
• UpdateBuild / UpdateTests / UpdateZero-style doc refresh; maps and documentation index.

Zeronode & Wallet

• IZeronodeWalletInterface-style abstraction (implementation + stub) and migration away from direct pwalletMain use in zeronode paths.
• Zeronode budget / RPC / main-loop validation and error-handling improvements.

Notes

• Client version numbers in configure.ac may still read 3.3.x but treat v4.0.0 as the release tag / branch milestone for this merge line.
• Earlier packaged releases are described by prior tags (e.g. v3.3.12); this changelog starts from 4.0.0.

Zero Currency - Version 3.4.0 Release

While making changes to build on Ubuntu 24.04 improvements have been made to the build system.
Testing infrastructure fixed, documentation expanded, bugs fixed.

Build System Enhancements

• Build documentation updated.
• Fixed wallet build compatibility and GCC 13+ support.

Testing Infrastructure

• Test coverage report added.
• Fixed transaction size validation tests.
• Fixed founders reward tests to match actual implementation.
• Fixed Boost PTHREAD_STACK_MIN compilation error.
• Fixed test system assertion failures and added error handling.
• Improved test framework infrastructure.
• Updated BUILD.md with current test status and verification.

Zeronode Improvements

• Implemented zeronode wallet interface abstraction.
• Improved zeronode error handling and validation.

Documentation & Maintenance

• Updated TODO.md with current status and next steps.
• Removed outdated documentation and build artifacts.

Zero Currency Coin turned five years old this February.

Deprecation has been pushed out for ten years! ;)

Release 3.3.1 is named Ambrym, after an island in the beautiful Vanuatu archipelago.
Ambrym is famous as the site of one of the largest volcanic explosions in recent geological history.

(2022-05-30 00:13:50 -0700)

3.3.0 expires around block 1,392,000 [~June 9, 2022] and should be replaced immediately!

Push deprecation out 10 years ;)

Images for Ubuntu Linux [20.04] and Windows 64 bit are attached, either as the full node executable or a compressed archive of that executable, with zero-cli and zero-tx.

A re-release of the desktop wallet bundle is forthcoming shortly...

Release 3.2.0 will deprecate on block 1143640, aiming for 26 weeks @ 720 blocks / day, after its release in Dec, 2020.
Today, June 22, 2021, around block 1140000, that's about four days away.

Release 3.3.0 targets deprecation 52 weeks out, on block 1392080, in early June 2022.
It is named Ambae, after an island in South Pacific, in the north of Vanuatu.

3.3.0 distributions include respectively Linux "zerod" and Windows "zerod.exe". MacOS binaries will be provided as requested.
Ubuntu 16, 18 [default] and 20 builds are provided for your convenience.

Kindly upgrade at your earliest opportunity, to avoid sudden service interruptions...

This release creates a new Transaction Archive and will automatically reindex on first load. Please plan accordingly.

Archived Transactions
Transactions are now saved to the wallet in a minimalistic fashion so that they may be recovered from the blockchain. The new structure only contains enough data to pinpoint the transaction on the blockchain and retrieve after they have been deleted from the active transactions using the deletetx functions. Active transactions are unchanged and still retain all of the original data structures.

Updated RPC
Multiple RPC have been updated to provide exchanges with detailed transaction information for both incoming and outgoing addresses. All of these updated RPCs utilize the new Archived Transaction feature to provide full wallet history.
zs_gettransaction
zs_listtransactions
zs_listrecievedbyaddress
zs_listspentbyaddress
zs_listsentbyaddress

Extended Full View key support
Extended Full view key support has been added to the full node so that users can see all of the incoming and outgoing transactions associated to this key. Support for this key is present in all of the new RPC calls above.

Disable prune mode, require txindex
Txindex is required for the Archived Transactions function to work correctly, prune mode is incompatible with txindex

The release adds several RPCs to support the ZeroVerse wallet.

1. getsaplingblocks
2. getsaplingwitness
3. getsaplingwitnessatheight

Zindex was ported from Hush to measure zaddress useage and provide chainwide stats.

z_viewtransaction was cherry picked from Zcash.

Deprecation height was raised to 1017115 which should be reached around 1/2/2021.

Target deprecation 886115 on about 6/27/2020

This release introduces new wallet options for more efficient transaction handling internally. Any options should be added to zero.conf

Creates a new method to compact the wallet.zero file when data is removed

Delete old transactions
a. Spent Note, Spent TXO's
b. Outgoing transactions after inputs no longer exist
c. sets minimum number of block to retain
d. sets the last N transactions to retain

Sapling Note witness rework.
a. Witnesses are not created until the blockchain has finished it;s initial sync
b. Initial Witnesses are created during the Delete Tx processes during initial sync or at the time of block processing after initial sync.
c. Witnesses are validated against the sapling root of the block corresponding to the witness height, witnesses are recalculated if the validation fails.

Automatic Note consolidation.
a. When enabled the note will automatically create consolidation transactions at between a random 5 - 10 block intervals with between a random minimum of 2 - 12 inputs and a random maximum 10 - 45 inputs.
b. Consolidation Tx fee can be set in the .conf file with a zatoshi value, default 0.

new options:

consolidation - Enable auto Sapling note consolidation (set to 1 to enable)
consolidationtxfee - Fee amount in Zatoshis used when sending consolidation transactions. (default 0)
consolidatesaplingaddress - when set with a sapling address, the node will only consolidate that specific address or addresses
deletetx - Enable Old Transaction Deletion (set to 1 to enable)
deleteinterval - Delete transaction every blocks during inital block download (default: 1000)
keeptxnum - Keep the last transactions (default: 200)
keeptxfornblocks - Keep transactions for at least blocks (default: 10000)

Security fix CVE-2017-18350
Security fix deserializing note plaintexts

Target deprecation 886115 on about 6/27/2020

Fixed 2 RPC calls which report Zeronode status
-getzeronodestatus
-listzeronodeconf

Added new functions and RPC calls designed to report outgoing shielded transactions and report transactions in a new consolidated format.
-zs_gettransaction
-zs_listreceivedbyaddress
-zs_listsentbyaddress
-zs_listspentbyaddress
-zs_listtransactions

Redesigned the getalldata RPC to use the new outgoing shielded functions.

Disabled the creation on new sprout addresses with z_getnewaddress