We are extremely proud to announce that the latest PIVX v4.3.0 core desktop wallet update is now live, and available for download!!

This is the fastest, leanest, and the most stable PIVX wallet release to date, that also includes many usability improvements and bug fixes.

It is backward compatible with v4.1.1 or higher and sets the foundation needed for the 5.0 privacy release coming in Q4!

Some Highlights:
– Massive performance & stability updates
– Network sync & staking process speedups
– Better resource management
– New coin cache structure
– Improved shared resources sync access
– Minor UI improvements
– Updated language translations
– Bug fixes

More info & download: https://pivx.org/wallet/

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RELEASE NOTES

PIVX Core version 4.3.0 is now available from: https://github.com/pivx-project/pivx/releases

This is a new major version release, including various bug fixes and performance improvements, as well as updated translations.

Please report bugs using the issue tracker at github: https://github.com/pivx-project/pivx/issues

Recommended Update

This version is an optional, but recommended, update for all users and services.

How to Upgrade

If you are running an older version, shut it down. Wait until it has completely shut down (which might take a few minutes for older versions), then run the installer (on Windows) or just copy over /Applications/PIVX-Qt (on Mac) or pivxd/pivx-qt (on Linux).

Downgrading warning

The chainstate database for this release is not compatible with previous releases, so if you run 4.3.0 and then decide to switch back to any older version, you will need to run the old release with the -reindex option to rebuild the chainstate data structures in the old format.

Compatibility

PIVX Core is extensively tested on multiple operating systems using the Linux kernel, macOS 10.10+, and Windows 7 and later.

Microsoft ended support for Windows XP on April 8th, 2014, No attempt is made to prevent installing or running the software on Windows XP, you can still do so at your own risk but be aware that there are known instabilities and issues. Please do not report issues about Windows XP to the issue tracker.

Apple released it’s last Mountain Lion update August 13, 2015, and officially ended support on December 14, 2015. PIVX Core software starting with v3.2.0 will no longer run on MacOS versions prior to Yosemite (10.10). Please do not report issues about MacOS versions prior to Yosemite to the issue tracker.

PIVX Core should also work on most other Unix-like systems but is not frequently tested on them.

Notable Changes

Performance Improvements

Version 4.3.0 contains a number of significant performance improvements, which make Initial Block Download, startup, transaction and block validation much faster:

  • The chainstate database (which is used for tracking UTXOs) has been changed from a per-transaction model to a per-output model (See PR 1801). Advantages of this model are that it:
    • avoids the CPU overhead of deserializing and serializing the unused outputs;
    • has more predictable memory usage;
    • uses simpler code;
    • is adaptable to various future cache flushing strategies.

    As a result, validating the blockchain during Initial Block Download (IBD) and reindex is ~30-40% faster, uses 10-20% less memory, and flushes to disk far less frequently. The only downside is that the on-disk database is 15% larger. During the conversion from the previous format a few extra gigabytes may be used.

  • LevelDB has been upgraded to version 1.22 (See PR 1738). This version contains hardware acceleration for CRC on architectures supporting SSE 4.2. As a result, synchronization and block validation are now faster.

Removal of Priority Estimation

Estimation of “priority” needed for a transaction to be included within a target number of blocks has been removed. The rpc calls are deprecated and will either return -1 or 1e24 appropriately.

The format for fee_estimates.dat has also changed to no longer save these priority estimates. It will automatically be converted to the new format which is not readable by prior versions of the software.

Dedicated mnping logging category

mnping related debug log messages have been moved to their own category of the same name. This is to reduce log spam when debugging with the masternode category enabled.

RPC Changes

Modified input/output for existing commands

  • The new database model no longer stores information about transaction
    versions of unspent outputs. This means that:

    • The gettxout RPC no longer has a version field in the response.
    • The gettxoutsetinfo RPC reports hash_serialized_2 instead of hash_serialized,
      which does not commit to the transaction versions of unspent outputs, but does
      commit to the height and coinbase/coinstake information.
    • The getutxos REST path no longer reports the txvers field in JSON format,
      and always reports 0 for transaction versions in the binary format
  • Three filtering options for the getbalance command have been reinstated:
    • minconf (numeric) Only include transactions confirmed at least this many times.
    • includeWatchonly (bool) Also include balance in watchonly addresses.
    • includeDelegated (bool) Also include balance delegated to cold stakers.
  • estimatefee is now deprecated and replaced by estimatesmartfee:
    • Input argument is the same for estimatesmartfee.
    • Output is now a JSON object with 2 fields: feerate and blocks
  • The getrawmempool RPC command now includes an additional output field:
    • modifiedfee (numeric) transaction fee with fee deltas used for mining priority.::ZZZZexit

Removed commands

The following commands have been removed from the interface:

  • estimatepriority

4.3.0 Change log

Detailed release notes follow. This overview includes changes that affect behavior, not code moves, refactors and string updates. For convenience in locating the code changes and accompanying discussion, both the pull request and git merge commit are mentioned.

Core Features

  • #1666 5a092159f6 [Core] Base work for the Sapling signatureHash (furszy)
  • #1746 128978d45b [Core] Only include undo.h from main.cpp (random-zebra)
  • #1768 6881e1063f [Core] Use SipHash-2-4 for various non-cryptographic hashes (Pieter Wuille)
  • #1771 bda654c5f3 [Core] Use SipHash for node eviction (Pieter Wuille)
  • #1773 90ffc6683b [Core] per-txout model preparation (random-zebra)
  • #1774 68df9a7d5b [Core] Alter assumptions in CCoinsViewCache::BatchWrite (random-zebra)
  • #1775 85b5f2eb83 [Core] Remove BIP30 check (random-zebra)
  • #1777 3c767c46b5 [Core] ModifyNewCoins saves database lookups (random-zebra)
  • #1788 823ba8e334 [Core] Remove priority estimation (random-zebra)
  • #1793 af793b7bb9 [Core] Safer modify new coins (Russell Yanofsky)
  • #1795 afafd7f6a9 [Core] Use unordered_map for CCoinsMap and fix empty vectors in streams (Pieter Wuille)
  • #1799 fcb546ad05 [Core] Remove UTXO cache entries when the tx they were added for is removed (Pieter Wuille)
  • #1801 30d353edab [Core] Per-txout model for chainstate database (random-zebra)
  • #1804 5c8b992033 [Core] Use std::unordered_{map,set} (C++11) instead of boost::unordered_* (random-zebra)

GUI

  • #1754 93d574170d [Model] Wallet interface refactor + code cleanup. (furszy)
  • #1776 2ad27b1407 [Model] TransactionRecord decomposeTransaction refactoring (furszy)
  • #1782 ada4462782 [GUI] Start masternodes polling timer only when is needed. (furszy)
  • #1805 f0cc6fcc38 [BUG][GUI] Don’t append cold-stake records twice (random-zebra)
  • #1863 ad15bce2f5 [Trivial][GUI] Fix init messages (random-zebra)

Wallet

  • #1752 2e32285a70 [Wallet] Simple unused methods cleanup. (furszy)
  • #1755 eeb129b477 [wallet] List COutput solvability + wallet_ismine refactoring. (furszy)
  • #1757 e2cc4aa411 [Wallet] add cacheable amounts for caching credit/debit values (furszy)
  • #1759 dcc92f8157 [Wallet] AvailableCoins remove duplicated watchonly config argument. (furszy)
  • #1760 3b030f9978 [Wallet] AvailableCoins code readability improved (furszy)
  • #1764 6847d0d648 [Wallet] Securely erase potentially sensitive keys/values (Thomas Snider)
  • #1767 8ab63d3e5b [Wallet] Ignore MarkConflict if block hash is not known (random-zebra)
  • #1781 4715915d4c [Wallet] Acquire cs_main lock before cs_wallet during wallet initialization (random-zebra)
  • #1783 abf7c62934 [Wallet] Do not try to resend transactions if the node is importing or in IBD (furszy)
  • #1787 4b1f3eb792 [Wallet] Improve usage of fee estimation code (random-zebra)
  • #1802 7db7724cff [Wallet] Make nWalletDBUpdated atomic to avoid a potential race (furszy)
  • #1810 49bd99929d [Wallet] wtx cached balances test coverage + getAvailableCredit problem fix. (furszy)
  • #1811 e89e20eca1 [Wallet][Refactoring] wallet/init refactoring backports (random-zebra)
  • #1817 6480c7d9bf [Wallet] Speedup coinstake creation removing redundancies. (furszy)
  • #1832 c14d130b48 [Wallet] Cleanup getbalance methods that are not fulfilling any purpose. (furszy)

P2P Protocol and Network Code

  • #1769 1e334200bb [Net] Remove bogus assert on number of oubound connections. (Matt Corallo)
  • #1780 5fcad0c139 [Net] cs_vSend-cs_main deadlock detection fixed. (furszy)
  • #1800 616b102f8b [P2P] Improve AlreadyHave (Alex Morcos)
  • #1812 777638e7bc [P2P] Begin Network Encapsulation (random-zebra)
  • #1835 cbd9271afb [Net] Massive network refactoring and speedup (Fuzzbawls)

RPC/REST

  • #1753 e288a4508b [Trivial] [RPC] Fix listcoldutxos help text (JSKitty)
  • #1828 4fc36b59ee [RPC][BUG] Fix ActivateBestChain calls in reconsider(invalidate)block (random-zebra)
  • #1831 28509bf9e8 [RPC] re introducing filtering args in getbalance (furszy)

Build Systems

  • #1553 fddf765132 [Build] Sapling Foundations (Build System + ZIP32) (furszy)
  • #1703 2e11030e8b [Build] Require minimum boost version 1.57.0 (Fuzzbawls)
  • #1738 21c467b1eb [Build] Update leveldb to 1.22+ (Fuzzbawls)
  • #1750 544e619ebe [Trivial] openssl.org dependency download link changed (CryptoDev-Project)
  • #1770 32a2e8a031 [Build] Bump minimum libc to 2.17 for release binaries (Fuzzbawls)
  • #1790 6e7b9b2a82 [Build] Fix glibc compat (Fuzzbawls)
  • #1792 a3da3aa9f5 [Build] allow for empty RUST_TARGET in offline builds (Fuzzbawls)
  • #1794 760f426430 [Build] Use syslibs for nightly snap builds (Fuzzbawls)
  • #1813 259523cdc2 [CMake] Define MAC_OSX for cmake builds on macOS (Fuzzbawls)
  • #1823 d675fa3a1a [Travis] Lower the build timeout for the functional tests job (random-zebra)

Layer 2 (MN/Budget)

  • #1791 6162df962b [Masternodes] Missing cs main locks in CalculateScore and GetMasternodeInputAge (furszy)
  • #1803 69ec4a3fdf [Cleanup] masternode-budget tiny cleanup. (furszy)
  • #1825 a06c0fd993 [MN] more cleanup over the tier two area. (furszy)
  • #1826 961f5373bf [Refactor] Masternode Budget first refactoring and cleanup (random-zebra)
  • #1843 f4d5d34bed [Bug] Update budget manager best height even if mnSync is incomplete (random-zebra)

Miner/Block Generation

  • #1700 40742084de [Miner] Move coinbase & coinstake to P2PKH (furszy)
  • #1809 959d707bc9 [Miner] decouple zPIV duplicated serials checks from CreateNewBlock (furszy)
  • #1816 0fa40d7695 [Miner] Unifying the disperse coinbase tx flow + further clean up. (furszy)
  • #1818 242356d012 [Miner] PoS process (furszy)

Miscellaneous

  • #1694 0604a98bd0 [Backport] Test LowS in standardness (furszy)
  • #1721 8e19562dc4 [Validation] Reduce cs_main locks during ConnectTip/SyncWithWallets (furszy)
  • #1725 e59d8e59fa [Backport] mempool score index. (Alex Morcos)
  • #1735 ee749c5b9c [Validation] DisconnectBlock updates. (furszy)
  • #1785 277b1114d9 [Bug] lock cs_main for Misbehaving (furszy)
  • #1796 6d62df529b [BUG] Properly copy fCoinStake memeber between CTxInUndo and CCoins (random-zebra)
  • #1797 b909e96121 [Refactoring] Break circular dependency main ↔ txdb (random-zebra)
  • #1806 b9f30f65f2 [Refactor] Cleanup access to chainActive in a few places (random-zebra)
  • #1808 948e1a99c0 [Tests][Trivial] Remove mining in rpc_deprecated test (random-zebra)
  • #1820 846dca7b83 [Cleanup] remove unneeded chainActive access. (furszy)
  • #1821 4b3fb02dc3 [Cleanup] removing unused GetMasternodeByRank method (furszy)
  • #1822 48d7475bd4 [Refactor] Dedicated logging category for masternode pings (random-zebra)
  • #1824 6ec609f93d [Cleanup] IsBlockValueValid refactored properly. (furszy)
  • #1827 70bf7203ee [Cleanup] removed null check comparison against a new object. (furszy)
  • #1833 9c06e5d7ce [Refactor] Remove GetInputAge and GetMasternodeInputAge (random-zebra)
  • #1853 e8d13ef4b0 [Cleanup] Removing unused and unneeded functions and members (furszy)
  • #1855 3cd52771f2 [Bug] wrong reserveKey when committing budget/proposal collaterals (random-zebra)
  • #1860 5aed03f6fe [Bug] Missing mnping category added to logcategories (furszy)

Credits

Thanks to everyone who directly contributed to this release:

  • Alex Morcos
  • Cory Fields
  • CryptoDev-Project
  • Daniel Kraft
  • Ethan Heilman
  • Fuzzbawls
  • Gregory Maxwell
  • JSKitty
  • Jack Grigg
  • Jeremy Rubin
  • Luke Dashjr
  • Matt Corallo
  • Patrick Strateman
  • Pavel Janík
  • Philip Kaufmann
  • Pieter Wuille
  • Russell Yanofsky
  • Suhas Daftuar
  • Thomas Snider
  • Wladimir J. van der Laan
  • furszy
  • jtimon
  • random-zebra

As well as everyone that helped translating on Transifex, the QA team during Testing and the Node hosts supporting our Testnet.

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