hush3/doc/relnotes

Official Hush Release Notes

Hush release notes were done on Github until 3.5.2, and now are officially part of our Git repo.

Downloading Releases

Hush releases are on our own Gitea at git.hush.is and no longer on Github, since they banned Duke Leto and also because they censor many people around the world and work with evil organizations.

Hush 3.10.2 "Fiendish Fenrir"

• RandomX mining is faster for various reasons
  • Large page support is enabled (needs to be enabled at OS level to be used)
    • This can lead to a 1-2% speed increase in mining depending on RAM and CPU
  • Various small optimizations such as making some variables static or const and removing unnecessary conditionals
  • Mining now starts faster because instead of only using 2 threads to prepare data needed to mine, now it uses all physical cores 1b5422eb2d
• RandomX mining takes slightly less memory
• ac_sapling is no longer an option for Arrakis Chains
  • All chains enable Sapling at height 1 like Hush + DragonX
  • This means there is no need to call NetworkUpgradeActive on every block height which means syncing is faster
• Delete cryptoconditions: #381
  • This means Hush+DragonX full nodes take up a lot less memory and binaries are smaller
  • It also means syncing, rescanning and compiling is faster
  • CLI options related to CryptoConditions ( `-ac_cc -ac_cclib -ac_ccenable -ac_ccactivate) have been removed
• Upgraded WolfSSL to 5.2.0 on Linux+Mac : #380
  • Upgraded to 4.8.1 on Windows because newer versions do not compile on Windows: 5e5a15018d
• Only Hush + DragonX will automatically connect to various seed nodes #379
  • Other Arrakis Chains must opt-in via -connect or -addnode
• Updated i2p seed node: 8c8b6e88f0
• Better error message: f64c10baa9, f71f8124c3
• Improve hush_scanner and seed node contrib file: 16dd3aef74
• Remove unused Makefile: #291
• Add script for scanning DragonX nodes: 0679468f60
• Add Fedora install process: #384
• Add Arch install process: #393
• More details about p2p encryption: ccc86839b9, a358acab0b, 4ed576a7e2
• Fix boost download link: 323d2134a1
• Remove unused code

Hush 3.10.1 "Oneiric Octopus"

This is an OPTIONAL but RECOMMENDED release for Hush full nodes. It fixes an important bug that affects new Hush nodes. It also makes syncing faster for both Hushd and DragonX nodes.

 26 files changed, 257 insertions(+), 429 deletions(-)

• Fix the bug which causes "payment to wrong pubkey" error when syncing a new node
• Faster syncing of Hush and DragonX full nodes
• Slightly less memory usage in each Equihash/RandomX mining thread
• Fixed compiling issues related to RandomX v1.2.1
• Improved RPC docs for getblocktemplate
• Removed the getdeprecationinfo RPC

Hush 3.10.0 "Sassy Siphonophore"

132 files changed, 6387 insertions(+), 2084 deletions(-)

This is a MANDATORY release for Hush and ALL nodes must upgrade by block height 1605555, which will happen on approximately Dec 16th 2023. YOU MUST UPGRADE YOUR HUSH FULL NODE TO THIS RELEASE BY DEC 15th 2023. If you do not, your node will not work correctly and will require a fresh sync to fix.

This is an OPTIONAL release for DragonX but it is highly recommended for miners and exchanges to update to this release.

• Hush and all Hush Smart Chains now use less RAM #283
  • Hush full nodes will use ~2GB less RAM
  • DragonX full nodes will use ~30MB less RAM
• Antispam defenses
  • Hush and all Hush Smart Chains now make it harder and more expensive for an attacker to send shielded spam. This raises the cost in CPU 14d3ae1785 and transaction fees 2308db22ee for Denial-of-Service attacks.
• New RPC z_getstats which reports data about numer of shielded inputs (zins) and shielded outputs (zouts) in transactions. 96ae2d61ca
• Fix a bug where hush-cli stop would not stop the node during the "Building Witnesses" rescan phase #330
• Fix bugs where abortrescan couldn't be used when node is start up (RPC warmup) and where it could not abort the rescan if it was in the "Building Witnesses" phase #331
• Fix bug in z_mergetoaddress where docs said you could use ANY_ZADDR but you couldn't 7eb9d75b94
• RPC z_listunspent now returns the text representation of a memo in memoStr key
• Upgraded curl to 8.4.0 #325
  • This fixes CVE-2023-38545 which affects very few or potentially no Hush/DragonX users. It could only affect people who compile Hush full node software (not those who use binaries or packages) and who use a malicious SOCKS5 proxy for all network traffic via the operating system.
• New documentation about using CJDNS with Hush: https://git.hush.is/hush/hush3/src/branch/dev/doc/cjdns.md
• Decentralized Devtax for improved scalability and operational security. This is a consensus change.
• DragonX specific changes:
  • Updated to latest RandomX v1.2.1 which includes mining optimizations 6029b3d571 #337
  • Fix RandomX mining memory leak and crash #324
    • This fixes the bug where stopping mining, making a transaction and then starting mining again
    • This also avoids an out-of-memory crash when miners change the number of threads of mining
    • Fixing this bug lead to a 10% hashrate increase vs the previous release
  • Fixed quoting bugs with dragonx-cli script
    • For instance, many RPCs such as dragonx z_sendmany ... would not previously work because the arguments to the RPC were not quoted correctly.

Hush 3.9.4 "Maniacal Manticore"

68 files changed, 1304 insertions(+), 1343 deletions(-)

This is an OPTIONAL release. It is recommended for exchanges, solo miners and mining pools to update to this release.

• New features and improvements
  • Hush and DragonX nodes will now sync much faster
  • DragonX now has checkpoints for faster better chain security
  • Updated to the latest RandomX code
  • Rate limiting for the processing of incoming addr messages for increased security.
  • Removed unused function CWalletTx::GetRequestCount
  • Removed mapRequest tracking that only affects Qt display.
  • Randomized message processing peer order for increased privacy.
  • Removed BIP35 mempool p2p message for increased privacy.
  • Additional community seed node
• Build Improvements
  • Use custom jobs param when compiling boost for faster compile times
  • Now builds with gcc13 thanks to testing from jahway
  • We have an aarch64 deb now thanks to jahway
• Bug fixes:
  • -stratumallowip works with CIDR and netmask ranges again for solo miners
  • Detect missing autoreconf in build.sh
  • Various assertions removed from BIP155 changes in previous release.

Hush 3.9.3 "Lateral Larvacean"

1012 files changed, 36253 insertions(+), 5507 deletions(-)

This is an OPTIONAL release. It is recommended for exchanges, solo miners and mining pools to update to this release.

• Many RandomX mining fixes and improvements
  • Difficulty bug affecting DRAGONX has been fixed
  • RandomX mining hashrate increase of about 60X
  • Optimized memory usage of RandomX mining
• This release adds Tor v3 and i2p support (BIP155 also known as addrv2)
  • Basic usage is hushd -proxy=127.0.0.1:9050 for using a local Tor proxy.
  • Use port 9150 if you are using Tor Browser. See docs/tor.md for details
  • New CLI args: -i2psam=<ip:port> and -i2pacceptincoming . See docs/i2p.md for more info
  • Tor and i2p seeds have been added
  • The format of peers.dat has changed. On first startup with this code there will be a short delay of a few minutes while new nodes are found and peers.dat is populated in it's new format.
• New RPCs:
  • getrescaninfo - Says if the node is rescanning with additional info about progress
  • abortrescan - stop rescanning if a node is currently rescanning

Hush 3.9.2 "Anecdotal Axolotl"

 966 files changed, 26999 insertions(+), 2758 deletions(-)

This is an OPTIONAL release. It is recommended for exchanges, solo miners and mining pools to update to this release since it contains various bugfixes and improvements that will benefit busy wallets.

• This release adds RandomX support in Hush Smart Chains (HSCs)
  • When creating a new HSC specify -ac_algo=randomx to use RandomX instead of Equihash
  • Example: hush-smart-chain -ac_name=RANDX -ac_algo=randomx ...
  • This allows HSCs to be mined with CPUs instead of ASICs
  • Because of RandomX, cmake is a new dependency needed to compile Hush from source
  • More detailed documentation available at https://git.hush.is/hush/hush3/src/branch/dev/doc/randomx.md
  • For general info about HSCs see https://git.hush.is/hush/hush3/src/branch/dev/doc/hsc.md
• A new feature called "zsweep" has been added, which defaults to disabled.
  • It will sweep funds from all zaddrs into a single specified zaddr
  • A new RPC z_sweepstatus will show various details about the sweeping
  • There are many advanced options to it, see full docs at https://git.hush.is/hush/hush3/src/branch/dev/doc/zsweep-consolidation.md
• Expired transactions will not be relayed and nodes who relay expired transactions are no longer banned
  • A node relaying expired transactions is usually misconfigured or confused, not attacking us
  • This change means node operators no longer need to deal with unbanning or allowlisting confused nodes
• Fix a rare coredump that could happen when nodes have many unconfirmed or expired transactions
• New RPC: getblockmerkletree, which will show the full Merkle Tree for a block height
• New RPC: z_consolidationstatus is similar to z_sweepstatus and will show config+stats about consolidation
• New RPC: z_anonsettxdelta : Returns delta (difference) in the anonset for a given txid.
  • A delta > 0 increases the anonset
  • A delta < 0 reduces the anonset
  • A delta=0 leaves the anonset the same
• New RPC: z_anonsetblockdelta : Returns delta (difference) in the anonset for a given block.
• getrawtransaction RPC now returns a "size" key with the size in bytes of a transaction
• sendmany RPC will now reject transactions that send to taddrs immediately, instead of them being rejected in mempool
• Preliminary support for FreeBSD has been added to the Hush build system
• New contrib scripts:
  • contrib/gen-zaddrs.pl - Generate zaddrs in bulk, defaults to 50
  • contrib/sdl_checkpoints.pl - Generate SDL checkpoints using getblockmerkletree
• ZeroMQ support has been removed from Hush

Hush 3.9.1 "Luciferous Locust"

This is an OPTIONAL release. It is most important for users with large wallets, as it fixes an important bug that causes the Hush full node to stop responding to requests. It is recommended for exchanges and mining pools to update to this release.

 34 files changed, 6530 insertions(+), 6344 deletions(-)

• Fix RPC deadlocks, which caused the RPC interface to hang.
  • A special thanks to ex-Hush developer miodrag who reported this in an upstream issue comment.
  • This turned out to be an upstream bug in Zcash that was inherited by Hush.
  • More details can be found at #77
• The listbanned RPC now returns a new key time_remaining which tells how many seconds are remaining in the ban
• The rescan RPC now works correctly when given a height. This can be used to do a partial rescan from a custom height, without restarting the node.
• Minimum disk space required for a running full node has been increased to 1GB from 50MB
  • This will print "Disk space is low!!!" and shut down the full node.
  • To fix, free up disk space and restart the node.
  • This change was implemented because in rare circumstances, large amounts of disk space can be used up quickly, faster than the node checks for free disk space, which can lead to a corrupt wallet.dat . Requiring more free disk space makes this much less likely.
• Dockerfile has been updated

Hush 3.9.0 "Unusual Ursid"

 136 files changed, 3881 insertions(+), 3156 deletions(-)

This is a MANDATORY release, please update as soon as you can! At some point, full nodes older than 3.9.0 will no longer be able to sync the current HUSH network correctly. More details will be given in a future update.

• 🌈 hushd/hush-cli/hush-tx are now true binaries instead of shell scripts
  • This means hushd.bat, hush-cli.bat and hush-tx.bat are no longer needed on Windows and simplifies the maintenance of internals
• 🎉 New official location for full node data is ~/.hush !
  • New full nodes will install and use ~/.hush
  • Existing full nodes will continue to use the legacy ~/.komodo directory
  • If both ~/.hush/HUSH3 and ~/.komodo/HUSH3 exist, the ~/.hush directory will be used
• 💋 Hush full nodes will now attempt to talk to two more nodes by default:
  • node1.hush.land
  • node2.hush.land
• 🍴 New RPCs:
  • listaddresses - Show all taddrs in this wallet.dat
  • rpcinfo - Shows stats about RPC internals
• 🦄 These RPCs can now be run during RPC warmup:
  • listaddresses
  • z_exportwallet
  • signmessage
  • decoderawtransaction
  • getnetworkinfo
• 💦 New doc/hushd.service to use hushd with systemd
  • Learn more at doc/hushd-systemd.md
• 🚀 Many updates to Hush Smart Chains and Hush internals
  • Optimize zaddrs by only building witness caches for blocks that involve our wallet
  • When RPC connection fails hush-cli now tells you which port it was trying to connect to
  • Calculation of HSC "network magic" has changed as of 3.9.0
    • If using or developing an HSC, all nodes must use either 3.8.0 or earlier, or preferably, all use 3.9.0 code or later. HSC networks using both 3.8.0 and 3.9.0 will not work.
    • This was required by internals changes and we do not plan to do this again.
• 🔨 New Stratum API so you can Solo mine with your full node!
  • This is an optional feature that defaults to disabled. Enable it with -stratum=1
  • Example usage: `hushd -stratum=1 -stratumport=31337 -stratumallowip=192.168.0.0/24'
    • This allows mining connections from your local network where computers have IPs like 192.168.0.x .
    • Your ASICs must be able to connect to the IP and port of your full node. Firewall rules may be needed.
  • It offers the highest privacy for miners, since mining pools know your IP and address metadata and can be hacked or coerced into giving that data. Solo mining with your own full node gives the absolute least metadata to third parties.
  • This is also the cheapest possible way to mine HUSH, since there are NO POOL FEES and NO PAYOUT TRANSACTION FEES! 😄
  • Miners can mine entire HUSH blocks from the privacy of their own server
  • As many ASICs as you like can be used with a single Hush full node, just use an address inside a wallet you control, and set your pool to the IP and port of your Hush full node with Stratum enabled.
• 🤓 The hush-smart-chain script is now installed in Debian packages

Hush 3.8.0 "Chuckling Chupacabra"

32 files changed, 712 insertions(+), 183 deletions(-)

This is an OPTIONAL release, but since it contains many privacy improvements, it's HIGHLY RECOMMENDED for all users to upgrade. It's VERY HIGHLY RECOMMENDED for mining pools to upgrade, since some improvements affect them.

* New Sietch feature: Randomized change output location
  * Zcash and Pirate always put the change as the last shielded output, which leaks metadata. Hush no longer has this metadata leakage.
  * This feature improves the `z_sendmany`, `z_mergetoaddress` and `z_shieldtocoinbase` since it's done in the Hush TransactionBuilder.
* New Sietch feature: Sitech-ified `z_shieldcoinbase`
  * This RPC now leaks less metadata by making it hard for blockchain analysts to know which of the three outputs has value.
  * This also increases Hush's "anonset velocity", which is how fast we increase our anonymity set, or "anonset".
* Thanks to [LuckPool](https://luckpool.net) for a patch that fixes how the longest chain is calculated.
  * This bug can prevent mining pools from making payout transactions, which is why this release is HIGHLY RECOMMENDED for mining pools.
* Previously you could only run `stop` while Hush was in RPC warmup, but now additional RPCs are allowed:
  * `stop` - Oops, you started hushd on accident a few seconds ago? Now you can stop it without waiting.
  * `help` - Get help during long rescans, finally!
  * `z_listaddresses` - See a list of all zaddrs in this wallet, even during a long rescan!
  * `z_exportkey` - Export a key from this node, even during rescan!
  * `listaddresses` - See a list of taddrs as soon as we load the wallet.
  * `dumpprivkey` - Dump the private key of a taddr, even when node isn't fully synced!
  * `getpeerinfo` - See current peers even before we get enough peers to start syncing or a long rescan!
* If the RPC interface is not functioning (such as filled by deadlocks or something else) it can become impossible to shut down hushd correctly!
  * Doing a `kill` of the process could corrupt wallet.dat and cause a very long rescan.
  * Now you can create a file called `plz_stop` in the same directory as wallet.dat
  * `hushd` checks for this file every 120 seconds and will shutdown if it sees it.
* `-keepnotewitnesscache` prevents the Sapling Note Witness cache from being deleted from wallet.dat on shutdown.
  * If your hushd crashed or needed to be `kill -9`, do `hushd -keepnotewitnesscache -rescan -rescanheight=XXX` with a height of just before it crashed
  * This will only rescan the latest part of the blockchain looking for new funds, instead of all of history. Much faster!
* `-rescanheight` can be used with `-keepnotewitnesscache` and `-rescan` to do a partial rescan of history and avoid completely rebuilding the Witness Cache.
* `-zindex` data is now stored on disk in the new `zindex.dat` file
  * All nodes that use `-zindex` will now have reliable anonset statistics even after a restart
* `getpeerinfo` now returns a `relaytxes` key which says if a remote node is relaying transactions to us
* Improvements to the RPC help documentation
* `hushd.bat` for Windows now uses the ASN map via `-asmap` and has the latest seed nodes
* `hushd-tx.bat` for Windows now exists for making raw transactions on Windows

Hush 3.7.1 "Neologistic Nautilus"

638 files changed, 1484 insertions(+), 962 deletions(-)

This is an OPTIONAL release for average Hush users, but is HIGHLY RECOMMENDED for service providers, such as lite wallet server ops, mining pools, exchanges, bots, etc.

Notable Changes

• 🎉 More internals code related to unused Sprout transactions was removed, making Hush run and compile faster and use less memory.
• 😄 We now give a more useful error message when a user attempts to make a tx before the node is synced.
• 🤓 z_sendmany RPC docs now show an example of a z2z transaction
• 🔐 Various security + privacy improvements to the network Peer To Peer (p2p) layer, including:
  • The deprecated alert p2p message is no longer processed and nodes using it will be banned.
  • try-before-evict ported from BTC core, which helps protect again Eclipse and Sybil Attacks
  • "Feeler connections" ported from BTC, another technique which makes Eclipse and Sybil Attacks harder and more expensive
  • From the paper "Eclipse Attacks on Bitcoin’s Peer-to-Peer Network" Ethan Heilman, Alison Kendler, Aviv Zohar, Sharon Goldberg. https://eprint.iacr.org/2015/263.pdf
  • Related to https://github.com/bitcoin/bitcoin/pull/8282
• 🦄 New RPC: z_getbalances returns a list of all zaddrs with non-zero balance.
  • An optional paramater can filter addresses to those with a specified minimum balance, such as z_getbalances 0.1 will only show HUSH zaddrs with at least 0.1 HUSH.
• 🌈 "Automagic z_sendmany" makes the RPC easier to use and also improves privacy
  • The z_sendmany RPC now understands a symbolic from address of z which means:
    • Randomly choose any zaddr with enough balance as from address
  • This means CLI users no longer need to run multiple RPC's to find a zaddr with enough balance and specify it themselves
  • It also means that CLI shell history and cronjobs or source code does not contain the source zaddr, improving privacy.

Hush 3.7.0 "Diffy The DAA Kungfoo Cuckoo"

13 files changed, 102 insertions(+), 91 deletions(-)

This is an OPTIONAL release for most Hush users. It is MANDATORY for miners, specifically solo miners and mining pools. It is not required for POOL miners.

Hush 3.6.3 "Autonomous Aconite's Aunt"

🌈 OPTIONAL but RECOMMENDED release. 🌈

This release is mostly the same as 3.6.2 but it fixes some issues in Debian+Arch packages and binaries not being able to find asmap.dat, which did not occur when building from Git source. This release protects all users, by default, from network attacks like the Erebus Attack: https://erebus-attack.comp.nus.edu.sg/

Hush 3.6.2 "Autonomous Aconite"

👀 This is an OPTIONAL but RECOMMENDED Hush Full Node release 👀

Notable changes

• 🤖 Autonomous System Map (asmap) bucketing by default
  • 🎉 HUSH is the first cryptocoin to take this work from BTC Core and turn it on by default for all nodes
  • 💯 SD 1.1.1 did this itself, and now we push that change into the full node itself.
  • 🤘 The new CLI flag -asmap is on by default, and can be turned off with -asmap=0
  • 🍑 This setting helps users by having 7.4 million "buckets" for peers instead of only 65000 which the traditional /16 scheme uses. This means all Hush full nodes are more protected against network-layer attacks such as the Erebus Attack: https://erebus-attack.comp.nus.edu.sg/
• 😉 debug.log is now shrunk to 15MB instead of 100MB
• 🤓 The max size of debug.log can now be controlled via -maxdebugfilesize
• 🌈 A new document that gives an Overview of Hush: https://git.hush.is/hush/hush3/src/branch/master/doc/overview.md

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Hush 3.6.1 "Syncopated Sphinx"

🔥 This is an OPTIONAL release, but upgrading is ENCOURAGED. 🔥

 101 files changed, 1158 insertions(+), 5793 deletions(-)

• 🎉 WolfSSL upgraded to 4.6.0 and side-channel resistance enabled via ECC_TIMING_RESISTANT
• 🌈 Hush full nodes will now exclusively communivate via P2P messages with TLS1.3, the option -tls=only has become default and cannot be turned off
• 💯 Improved error-handling and logging of TLS connections
• 🍑 getpeerinfo now shows 3 new keys for each peer:
  • tls_established - if a TLS connection has been established to this peer
  • tls_cipher - which TLS cipher is being used with this peer
  • tls_verified - if the TLS certificate was validated
• 💋 Important Windows bugfix: SIGTERM is now handled correctly on Windows, which means hushd will be less likely to corrupt data on disk
• 🤓 New developer documentation in DEVELOPING.md
• 👽 -whitelist and -whitelistaddress are now called -allowlist and -allowlistaddress
  • Duke Leto felt the old terminology of a "whitelist" was racist and unintuitive for non-native speakers, so it was changed.
• 🔐 Minimum protocol version is now 1987420

Hush 3.6.0 "Decentralized Dominatrix"

983 files changed, 7736 insertions(+), 17688 deletions(-)

🤘 🤘 🤘 This release consists of 25454 lines of changes, almost 18000 lines of deletions and just short of 1000 files changed! This is why Hush code is so fast, we delete all that KYC/PoS/Sprout stuff from KMD internals we inherited and improve daily. 🤘 🤘 🤘

• 💯 Fixes sync issues near block 340k caused by blocktime halving bug
• 💦 New official domain https://hush.is reflected everywhere
• 🎉 Hush Docker scripts are now officially maintained!
• 🍆 New Hush DPoW Notaries replace KMD Notaries (who attacked us, lulz)
• 🚀 Increasd in-memory UTXO cache db by 100MB (25%) to increase performance of initial syncing
• 🐉 Prevent Delayed-Proof-of-Work attack from Komodo Notaries
  • 💩 KMD notaries provably attacked the HUSH blockchain via their pubkeys
  • 🙊 All trust in their service has now been lost, and all Komodo pubkeys have been removed from Hush source code
  • 👽 "Malicious Notarized Chainforks" is an attack only Komodo Notaries can perform against chains they are supposed to protect. More details to be released soon.
  • 🌈 Defense-in-depth has been implemented and an overhaul+audit of the entire Hush source code was implemented, which is partially why this release has so many changes.
  • 👼 New -dpow-start-height CLI flag can be used to reject all DPoW transactions (and attacks) up to a certain height, which is a general defense against potential future DPoW attacks. Also: Fuck you, jl777.
  • 💋 Hush developers will not be silenced and laugh at KMD NN ops with too much time on their hands
• 🔐 More secure+private TLS 1.3 implementation from miodrag, thanks!
  • 📢 We now use WolfSSL 4.5.0 instead of OpenSSL, a huge improvement and decrease in attack surface as well as allowing use to do TLS on low resource devices (like internet-of-shit light bulbs/etc)
  • 🔒 Nodes randomly choose between GCM-SHA384 and CHACHA20-POLY1305-SHA256 when making connections to other nodes.
• 🐇 Faster release binaries with -03
• 🍴 Optimized and hardened memory pool code
• 🔨 getblocktemplate RPC now provides better error reporting about whether there are no peers or if it's not in sync
• ♻️ Removed more Sprout code which is tightly mixed into deep internals, which increases compile speed and reduces memory overhead
• 🏄 New P2P protocol version. Peers only talk to 3.5.x nodes and newer

3.6.0 Checksums

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