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Monacoin Core version 0.20.2 is now available from:

https://github.com/monacoinproject/monacoin/releases

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

Please report bugs using the issue tracker at GitHub:

https://github.com/monacoinproject/monacoin/issues

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/Monacoin-Qt (on Mac) or monacoind/monacoin-qt (on Linux).

If your node has a txindex, the txindex db will be migrated the first time you run 0.17.0 or newer, which may take up to a few hours. Your node will not be functional until this migration completes.

The first time you run version 0.15.0 or newer, your chainstate database will be converted to a new format, which will take anywhere from a few minutes to half an hour, depending on the speed of your machine.

Note that the block database format also changed in version 0.8.0 and there is no automatic upgrade code from before version 0.8 to version 0.15.0. Upgrading directly from 0.7.x and earlier without redownloading the blockchain is not supported. However, as usual, old wallet versions are still supported.

Downgrading warning

The chainstate database for this release is not compatible with previous releases, so if you run 0.15 and then decide to switch back to any older version, you will need to run the old release with the -reindex-chainstate option to rebuild the chainstate data structures in the old format.

If your node has pruning enabled, this will entail re-downloading and processing the entire blockchain.

Compatibility

Monacoin Core is extensively tested on multiple operating systems using the Linux kernel, macOS 10.12+, and Windows 7 and newer. Monacoin Core should also work on most other Unix-like systems but is not as frequently tested on them.

From Monacoin Core 0.20.0 onwards macOS versions earlier than 10.12 are no longer supported. Additionally, Monacoin Core does not yet change appearance when macOS "dark mode" is activated.

Known issues

The process for generating the source code release ("tarball") has changed in an effort to make it more complete, however, there are a few regressions in this release:

  • The generated configure script is currently missing, and you will need to install autotools and run ./autogen.sh before you can run ./configure. This is the same as when checking out from git.

  • Instead of running make simply, you should instead run BITCOIN_GENBUILD_NO_GIT=1 make.

Notable changes

Bitcoin based

In previous releases, Monacoin Core was based on Litecoin Core. Since this replase, Monacoin Core will be based on Bitcoin Core. Some patches are still based on Litecoin Core for backward consensus compatibilities. But newer patches by Litecoin won't be applied to Monacoin Core.

new scrypt.c from Verge

scrypt.c is replaced from Litecoin's to Verge's. New scrypt.c is OPenSSL free. And it is enough stable. Note that it is not lisensed under MITL. Please see the license header in src/crypto/scrypt.cpp.

Good-bye the checkpoint delivery system

The checkpoint delivery system was removed. Monacoin network should be de-centralized. That system wasn't. Some people think risks of rewind attacks by crackers. But no worry. The recent Monacoin chain has enough hash power. Thanks miners for keeping work.

Credits

Thanks to everyone who directly contributed to this release:

  • Cryptcoin Junkey
  • WakiayaP
  • Watanabe
  • yamada-guro-baru

(alphabetical order)

And Core Developers:

  • Bitcoin
  • Litecoin
  • Verge

And all Monacoiners:

  • {Your name}