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25.0 Release Notes

Monacoin Core version 25.0 is now available from:

https://github.com/monacoin-core/monacoin/releases

This release includes new features, various bug fixes and performance improvements, as well as updated translations.

Please report bugs using the issue tracker at GitHub:

https://github.com/monacoin-core/monacoin/issues

To receive security and update notifications, please subscribe to:

https://bitcoincore.org/en/list/announcements/join/

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 in some cases), then run the installer (on Windows) or just copy over /Applications/Monacoin-Qt (on macOS) or monacoind/monacoin-qt (on Linux).

Upgrading directly from a version of Monacoin Core that has reached its EOL is possible, but it might take some time if the data directory needs to be migrated. Old wallet versions of Monacoin Core are generally supported.

Compatibility

Monacoin Core is supported and extensively tested on operating systems using the Linux kernel, macOS 10.15+, and Windows 7 and newer. Monacoin Core should also work on most other Unix-like systems but is not as frequently tested on them. It is not recommended to use Monacoin Core on unsupported systems.

Notable changes

P2P and network changes

  • Transactions of non-witness size 65 and above are now allowed by mempool and relay policy. This is to better reflect the actual afforded protections against CVE-2017-12842 and open up additional use-cases of smaller transaction sizes. (#26265)

New RPCs

  • The scanblocks RPC returns the relevant blockhashes from a set of descriptors by scanning all blockfilters in the given range. It can be used in combination with the getblockheader and rescanblockchain RPCs to achieve fast wallet rescans. Note that this functionality can only be used if a compact block filter index (-blockfilterindex=1) has been constructed by the node. (#23549)

Updated RPCs

  • All JSON-RPC methods accept a new named parameter called args that can contain positional parameter values. This is a convenience to allow some parameter values to be passed by name without having to name every value. The python test framework and monacoin-cli tool both take advantage of this, so for example:
monacoin-cli -named createwallet wallet_name=mywallet load_on_startup=1

Can now be shortened to:

monacoin-cli -named createwallet mywallet load_on_startup=1

  • The verifychain RPC will now return false if the checks didn't fail, but couldn't be completed at the desired depth and level. This could be due to missing data while pruning, due to an insufficient dbcache or due to the node being shutdown before the call could finish. (#25574)

  • sendrawtransaction has a new, optional argument, maxburnamount with a default value of 0. Any transaction containing an unspendable output with a value greater than maxburnamount will not be submitted. At present, the outputs deemed unspendable are those with scripts that begin with an OP_RETURN code (known as 'datacarriers'), scripts that exceed the maximum script size, and scripts that contain invalid opcodes.

  • The testmempoolaccept RPC now returns 2 additional results within the "fees" result: "effective-feerate" is the feerate including fees and sizes of transactions validated together if package validation was used, and also includes any modified fees from prioritisetransaction. The "effective-includes" result lists the wtxids of transactions whose modified fees and sizes were used in the effective-feerate (#26646).

  • decodescript may now infer a Miniscript descriptor under P2WSH context if it is not lacking information. (#27037)

  • finalizepsbt is now able to finalize a transaction with inputs spending Miniscript-compatible P2WSH scripts. (#24149)

Changes to wallet related RPCs can be found in the Wallet section below.

Build System

  • The --enable-upnp-default and --enable-natpmp-default options have been removed. If you want to use port mapping, you can configure it using a .conf file, or by passing the relevant options at runtime. (#26896)

Updated settings

  • If the -checkblocks or -checklevel options are explicitly provided by the user, but the verification checks cannot be completed due to an insufficient dbcache, Monacoin Core will now return an error at startup. (#25574)

  • Ports specified in -port and -rpcport options are now validated at startup. Values that previously worked and were considered valid can now result in errors. (#22087)

  • Setting -blocksonly will now reduce the maximum mempool memory to 5MB (users may still use -maxmempool to override). Previously, the default 300MB would be used, leading to unexpected memory usage for users running with -blocksonly expecting it to eliminate mempool memory usage.

    As unused mempool memory is shared with dbcache, this also reduces the dbcache size for users running with -blocksonly, potentially impacting performance.

  • Setting -maxconnections=0 will now disable -dnsseed and -listen (users may still set them to override).

Changes to GUI or wallet related settings can be found in the GUI or Wallet section below.

New settings

  • The shutdownnotify option is used to specify a command to execute synchronously before Monacoin Core has begun its shutdown sequence. (#23395)

Wallet

  • The minconf option, which allows a user to specify the minimum number of confirmations a UTXO being spent has, and the maxconf option, which allows specifying the maximum number of confirmations, have been added to the following RPCs in #25375:

    • fundrawtransaction
    • send
    • walletcreatefundedpsbt
    • sendall

  • Added a new next_index field in the response in listdescriptors to have the same format as importdescriptors (#26194)

  • RPC listunspent now has a new argument include_immature_coinbase to include coinbase UTXOs that don't meet the minimum spendability depth requirement (which before were silently skipped). (#25730)

  • Rescans for descriptor wallets are now significantly faster if compact block filters (BIP158) are available. Since those are not constructed by default, the configuration option "-blockfilterindex=1" has to be provided to take advantage of the optimization. This improves the performance of the RPC calls rescanblockchain, importdescriptors and restorewallet. (#25957)

  • RPC unloadwallet now fails if a rescan is in progress. (#26618)

  • Wallet passphrases may now contain null characters. Prior to this change, only characters up to the first null character were recognized and accepted. (#27068)

  • Address Purposes strings are now restricted to the currently known values of "send", "receive", and "refund". Wallets that have unrecognized purpose strings will have loading warnings, and the listlabels RPC will raise an error if an unrecognized purpose is requested. (#27217)

  • In the createwallet, loadwallet, unloadwallet, and restorewallet RPCs, the "warning" string field is deprecated in favor of a "warnings" field that returns a JSON array of strings to better handle multiple warning messages and for consistency with other wallet RPCs. The "warning" field will be fully removed from these RPCs in v26. It can be temporarily re-enabled during the deprecation period by launching monacoind with the configuration option -deprecatedrpc=walletwarningfield. (#27279)

  • Descriptor wallets can now spend coins sent to P2WSH Miniscript descriptors. (#24149)

GUI changes

  • The "Mask values" is a persistent option now. (gui#701)
  • The "Mask values" option affects the "Transaction" view now, in addition to the "Overview" one. (gui#708)

REST

  • A new /rest/deploymentinfo endpoint has been added for fetching various state info regarding deployments of consensus changes. (#25412)

Binary verification

Low-level changes

RPC

  • The JSON-RPC server now rejects requests where a parameter is specified multiple times with the same name, instead of silently overwriting earlier parameter values with later ones. (#26628)
  • RPC listsinceblock now accepts an optional label argument to fetch incoming transactions having the specified label. (#25934)
  • Previously setban, addpeeraddress, walletcreatefundedpsbt, methods allowed non-boolean and non-null values to be passed as boolean parameters. Any string, number, array, or object value that was passed would be treated as false. After this change, passing any value except true, false, or null now triggers a JSON value is not of expected type error. (#26213)

Credits

Thanks to everyone who directly contributed to this release:

  • 0xb10c
  • 721217.xyz
  • @RandyMcMillan
  • amadeuszpawlik
  • Amiti Uttarwar
  • Andrew Chow
  • Andrew Toth
  • Anthony Towns
  • Antoine Poinsot
  • Aurèle Oulès
  • Ben Woosley
  • Monacoin Hodler
  • brunoerg
  • Bushstar
  • Carl Dong
  • Chris Geihsler
  • Cory Fields
  • David Gumberg
  • dergoegge
  • Dhruv Mehta
  • Dimitris Tsapakidis
  • dougEfish
  • Douglas Chimento
  • ekzyis
  • Elichai Turkel
  • Ethan Heilman
  • Fabian Jahr
  • FractalEncrypt
  • furszy
  • Gleb Naumenko
  • glozow
  • Greg Sanders
  • Hennadii Stepanov
  • hernanmarino
  • ishaanam
  • ismaelsadeeq
  • James O'Beirne
  • [email protected]
  • Jeff Ruane
  • Jeffrey Czyz
  • Jeremy Rubin
  • Jesse Barton
  • João Barbosa
  • JoaoAJMatos
  • John Moffett
  • Jon Atack
  • Jonas Schnelli
  • jonatack
  • Joshua Kelly
  • josibake
  • Juan Pablo Civile
  • kdmukai
  • klementtan
  • Kolby ML
  • kouloumos
  • Kristaps Kaupe
  • laanwj
  • Larry Ruane
  • Leonardo Araujo
  • Leonardo Lazzaro
  • Luke Dashjr
  • MacroFake
  • MarcoFalke
  • Martin Leitner-Ankerl
  • Martin Zumsande
  • Matt Whitlock
  • Matthew Zipkin
  • Michael Ford
  • Miles Liu
  • mruddy
  • Murray Nesbitt
  • muxator
  • omahs
  • pablomartin4btc
  • Pasta
  • Pieter Wuille
  • Pttn
  • Randall Naar
  • Riahiamirreza
  • roconnor-blockstream
  • Russell O'Connor
  • Ryan Ofsky
  • S3RK
  • Sebastian Falbesoner
  • Seibart Nedor
  • sinetek
  • Sjors Provoost
  • Skuli Dulfari
  • SomberNight
  • Stacie Waleyko
  • stickies-v
  • stratospher
  • Suhas Daftuar
  • Suriyaa Sundararuban
  • TheCharlatan
  • Vasil Dimov
  • Vasil Stoyanov
  • virtu
  • w0xlt
  • willcl-ark
  • yancy
  • Yusuf Sahin HAMZA

As well as to everyone that helped with translations on Transifex.