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dash/doc/release-notes.md
xdustinface 17b7ab1b63 Bump version to 0.17.0.2
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Dash Core version 0.17.0.2

Release is now available from:

https://www.dash.org/downloads/#wallets

This is a new major version release, bringing new features, various bugfixes and other improvements.

This release is mandatory for all nodes.

Please report bugs using the issue tracker at github:

https://github.com/dashpay/dash/issues

Upgrading and downgrading

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/Dash-Qt (on Mac) or dashd/dash-qt (on Linux). If you upgrade after DIP0003 activation and you were using version < 0.13 you will have to reindex (start with -reindex-chainstate or -reindex) to make sure your wallet has all the new data synced. Upgrading from version 0.13 should not require any additional actions.

When upgrading from a version prior to 0.14.0.3, the first startup of Dash Core will run a migration process which can take a few minutes to finish. After the migration, a downgrade to an older version is only possible with a reindex (or reindex-chainstate).

Downgrade warning

Downgrade to a version < 0.14.0.3

Downgrading to a version older than 0.14.0.3 is no longer supported due to changes in the "evodb" database format. If you need to use an older version, you must either reindex or re-sync the whole chain.

Downgrade of masternodes to < 0.17.0.2

Starting with the 0.16 release, masternodes verify the protocol version of other masternodes. This results in PoSe punishment/banning for outdated masternodes, so downgrading even prior to the activation of the introduced hard-fork changes is not recommended.

Notable changes

Opcode updates

Several opcodes have been reactivated/introduced to broaden the functionality of the system and enable developers to build new solutions. These opcodes are a combination of previously disabled ones that have been found to be safe and new ones previously introduced by Bitcoin Cash. Details of the opcodes are provided in DIP-0020.

These opcodes are activated via a BIP9 style hard fork that will begin signalling on July 1st using bit 6. Any nodes that do not upgrade by the time this feature is activated will diverge from the rest of the network.

DKG Data Sharing

Quorum resilience has been improved by enabling masternodes to request DKG data from other quorum members. This allows Dash Platform to obtain required information while also making it possible for corrupted masternodes to recover the DKG data they need to participate in quorums they are part of. Details are provided in DIP-0021.

Platform support

Support for Dash Platform has been expanded through the addition of a new quorum type LLMQ_100_67, several RPCs, and a way to limit Platform RPC access to a subset of allowed RPCs, specifically:

  • getbestblockhash
  • getbestchainlock
  • getblockcount
  • getblockhash
  • quorum sign (for platform quorums only)
  • quorum verify
  • verifyislock

These changes provide necessary Platform capabilities while maximizing the isolation between Core and Platform. New quorum type will be activated using the same bit 6 introduced to activate new opcodes.

BLS update

Dash Core’s BLS signature library has been updated based on v1.0 of the Chia BLS library to support migration to a new BLS signature scheme which will be implemented in a future version of DashCore. These changes will be made to align with standards and improve security.

Network performance improvements

This version of Dash Core includes multiple optimizations to the network and p2p message handling code.

We reintroduced Intra-Quorum Connections which were temporary disabled with the introduction of SPORK_21_QUORUM_ALL_CONNECTED. This should make communications for masternodes belonging to the same quorum more robust and improve network connectivity in general.

FreeBSD and MacOS machines will now default to the new kqueue network mode which is similar to epoll mode on linux-based. It removes most of the CPU overhead caused by the sub-optimal use of select in the network thread when many connections were involved.

Wallet changes

Upgrading a non-Hierarchical Deterministic (HD) wallet to an HD wallet is now possible. Previously new HD wallets could be created, but non-HD wallets could not be upgraded. This update will enable existing non-HD wallets to upgrade to take advantage of HD wallet features. Upgrades can be done via either the debug console or command line and a new backup must be made when this upgrade is performed.

Users can now load and unload wallets dynamically via RPC and GUI console. It's now possible to have multiple wallets loaded at the same time, however only one of them is going to be active and receive updates or be used for sending trasactions at a specific point in time.

Also, enabling wallet encryption no longer requires a wallet restart.

Sporks

Several spork changes have been made to streamline code and improve system reliability. Activation of SPORK_22_PS_MORE_PARTICIPANTS in DashCore v0.16 has rendered that spork unnecessary. The associated logic has been hardened and the spork removed. SPORK_21_QUORUM_ALL_CONNECTED logic has been split into two sporks, SPORK_21_QUORUM_ALL_CONNECTED and SPORK_23_QUORUM_POSE, so that masternode quorum connectivity and quorum Proof of Service (PoSe) can be controlled independently. Finally, SPORK_2_INSTANTSEND_ENABLED has a new mode (value: 1) that enables a smooth transition in case InstantSend needs to be disabled.

Statoshi backport

This version includes a backport of Statoshi functionality which allows nodes to emit metrics to a StatsD instance. This can help node operators to learn more about node performance and network state in general. We added several command line options to give node operators more control, see options starting with -stats prefix.

PrivateSend rename

PrivateSend has been renamed to CoinJoin to better reflect the functionality it provides and align with industry standard terminology. The renaming only applies to the UI and RPCs but does not change functionality.

Build system

Multiple packaged in depends were updated. Current versions are:

  • biplist 1.0.3
  • bls-dash 1.0.1
  • boost 1.70.0
  • cmake 3.14.7
  • expat 2.2.5
  • mac alias 2.0.7
  • miniupnpc 2.0.20180203
  • qt 5.9.6
  • zeromq 4.2.3

Packages libX11, libXext, xextproto and xtrans are no longer used.

Minimum supported macOS version was bumped to 10.10.

RPC changes

There are seven new RPC commands which are Dash specific and seven new RPC commands introduced through Bitcoin backports. One previously deprecated RPC, estimatefee, was removed and several RPCs have been deprecated.

The new RPCs are:

  • createwallet
  • getaddressesbylabel
  • getaddressinfo
  • getzmqnotifications
  • gobject list-prepared
  • listlabels
  • masternode payments
  • quorum getdata
  • quorum verify
  • signrawtransactionwithkey
  • signrawtransactionwithwallet
  • unloadwallet
  • verifychainlock
  • verifyislock
  • upgradetohd

The deprecated RPCs are all related to the deprecation of wallet accounts and will be removed in DashCore v0.18. Note that the deprecation of wallet accounts means that any RPCs that previously accepted an “account” parameter are affected — please refer to the RPC help for details about specific RPCs.

The deprecated RPCs are:

  • getaccount
  • getaccountaddress
  • getaddressbyaccount
  • getreceivedbyaccount
  • listaccounts
  • listreceivedbyaccount
  • masternode current
  • masternode winner
  • move
  • sendfrom
  • setaccount

protx register and protx register_fund RPCs now accept an additional submit parameter which allows producing and printing ProRegTx-es without relaying them to the network.

Also, please note that all mixing-related RPCs have been renamed to replace “PrivateSend” with “CoinJoin” (e.g. setprivatesendrounds -> setcoinjoinrounds).

Please check help <command> for more detailed information on specific RPCs.

Command-line options

Changes in existing cmd-line options:

New cmd-line options:

  • -dip8params
  • -llmq-data-recovery
  • -llmq-qvvec-sync
  • -llmqinstantsend
  • -platform-user
  • -statsenabled
  • -statshost
  • -statshostname
  • -statsport
  • -statsns
  • -statsperiod
  • -zmqpubhashrecoveredsig
  • -zmqpubrawrecoveredsig

Also, please note that all mixing-related command-line options have been renamed to replace “PrivateSend” with “CoinJoin” (e.g. setprivatesendrounds -> setcoinjoinrounds).

Please check Help -> Command-line options in Qt wallet or dashd --help for more information.

Backports from Bitcoin Core 0.17

This release also introduces over 450 updates from Bitcoin v0.17 as well as some updates from Bitcoin v0.18 and more recent versions. This includes a number of performance improvements, dynamic loading of wallets via RPC, support for signalling pruned nodes, and a number of other updates that will benefit Dash users. Bitcoin changes that do not align with Dash’s product needs, such as SegWit and RBF, are excluded from our backporting. For additional detail on what’s included in Bitcoin v0.17, please refer to their release notes.

Miscellaneous

A lot of refactoring, code cleanups and other small fixes were done in this release.

0.17.0.2 Change log

See detailed set of changes.

Credits

Thanks to everyone who directly contributed to this release:

  • 10xcryptodev
  • dustinface (xdustinface)
  • Kittywhiskers Van Gogh (kittywhiskers)
  • Kolby Moroz Liebl (KolbyML)
  • Konstantin Shuplenkov (shuplenkov)
  • Minh20
  • PastaPastaPasta
  • strophy
  • thephez
  • tomthoros
  • UdjinM6

As well as everyone that submitted issues and reviewed pull requests.

Older releases

Dash was previously known as Darkcoin.

Darkcoin tree 0.8.x was a fork of Litecoin tree 0.8, original name was XCoin which was first released on Jan/18/2014.

Darkcoin tree 0.9.x was the open source implementation of masternodes based on the 0.8.x tree and was first released on Mar/13/2014.

Darkcoin tree 0.10.x used to be the closed source implementation of Darksend which was released open source on Sep/25/2014.

Dash Core tree 0.11.x was a fork of Bitcoin Core tree 0.9, Darkcoin was rebranded to Dash.

Dash Core tree 0.12.0.x was a fork of Bitcoin Core tree 0.10.

Dash Core tree 0.12.1.x was a fork of Bitcoin Core tree 0.12.

These release are considered obsolete. Old release notes can be found here: