Nyancoin Wallet Software

To use Nyancoin, download and run the Nyancoin software.
When run for the first time, the entire blockchain will be downloaded. This can take several hours, but only has to be done once.

If restarting the software after a few hours or days, it will automatically 'catch up' when started, this may take a few minutes.


Windows Nyancoin Version 1.3.1, 25 October 2017:

Windows 32 bit, zip file 10.7MB, SHA256 Hash: 241282c1049652f1e823f4d20b72230153a031f9c525a4939171148233d24146

Windows 64 bit, zip file 11.3MB, SHA256 Hash: 3c58569467f82edb60d5f852c6c9ef689306b382759e839623c7f6af9a99cec3

To obtain hash values for the downloaded files, various tools are available.

Some antivirus products will claim that these files contain a virus/trojan or similar. These false positives are triggered by the RPC server and mining elements of the software, as such things have also been used by malware to install mining software without the knowledge or consent of the user.

This problem is not restricted to Nyancoin - it happens with similar software for other coins.

If upgrading from a previous version

  1. Exit Nyancoin if already running
  2. Open the zip file and extract Nyancoin-qt.exe
  3. Replace your existing Nyancoin-qt.exe with the new version
  4. Run the software in the usual way.

Configuration and block files etc. are the same, no need to change anything else or download the blockchain again. Any shortcuts or links to the software will still work as before.

As with all software, regular backups are recommended, particularly the wallet which contains the keys to whatever Nyancoin you may own.

Errors when running?

If you get the error 'EXCEPTION: 22DbRunRecoveryException ' when starting the new version, this can be resolved by deleting the file(s) in the database folder. These are typically named log.0000000001 (the number may vary). The software will recreate the file automatically.

On Windows, the database folder is located by default at C:\Users\USERNAME\AppData\Roaming\NyanCoin\database\ where USERNAME is whatever your Windows username is.

For a new installation:

  1. Open the file - it's an archive containing a file called Nyancoin-qt.exe
  2. Copy the file to somewhere on your computer and run it.
  3. If you get any warnings from firewall or security software about the program trying to run, connect or do anything, you must ALLOW this. The software relies on being able to download transactions from other computers running Nyancoin, and to send any transactions you make to the others - without this, it will do nothing.
  4. The software will now automatically connect to the Nyancoin network and start downloading the blockchain (the list of every Nyancoin transaction so far). This will probably take several hours, so just leave the program running until that has finished.
  5. If you can't leave the computer on until download has completed, exit the program, wait for it to close and shut down the computer. When started the next time, it will continue downloading from where it got to previously.

Firewalls Etc.

The current version of the software does NOT open firewall ports automatically. Therefore if possible, please set port 33701 to accept incoming connections. For home use, this is usually done in your router configuration.

If you can't do this, then the software will still function - it just means that you can create connections to others, but they cannot connect to you.


October 2016, created by bitcointalk user bumbacoin.

Nyancoin-Qt-OSX-v1300.dmg (12.3MB)

Note that this suffers from the 'key compromised' message - however the message is harmless and can be ignored.
If you can assist in compiling a newer version for Mac then please contact via reddit.

The process should be similar to the Windows information above. Downloading the blockchain for the first time will take several hours - but only has to be done once.


v1.3.1, October 2017: https://github.com/Nyancoins/nyancoin-client
Latest release removes the alert system which displayes the 'key compromised' message.

Build instructions are in /doc/build-unix.txt for the command line only version.
Or see /doc/readme-qt.rst for the QT graphical interface version.

The software uses port 33701 for connections so this must be set to open in your firewall configuration.

The block files and index currently require about 3 GB of disk space, and the software can be run on most low-end virtual servers. For best performance, at least 1GB of RAM is suggested. It can run with less, but performance is likely to be poor.

Older versions

The older versions are not recommended for use. They are years out of date and not supported or maintained by anyone.
If you really want to use them, they can be found here, however for any normal purposes you should be using the current versions as shown above.

Updated 13 May 2021. Contact / impressum