Dear NiceHash Miners,

today, (Tuesday, the 27th), we conducted a technical update on our servers. We urge you to ensure that your rigs support the XNSUB extension.

The update only affected rigs not utilizing the extranonce subscribe extension (XNSUB) on the Equihash algorithm. 

Rigs that will not understand the message are effectively incompatible with us, and they will get a majority of their shares rejected with reject type 'Above Target'.

Fortunately, the majority of Equihash rigs are already equipped to handle XNSUB messages. However, we anticipate a higher rate of incompatibility with rigs operating on older firmware.

Notice: XNSUB support can help improve the earnings of your operations due to less stale rejects and is recommended nevertheless.

Verifying XNSUB support on your NiceHash Workers

To check whether your workers are XNSUB-compatible, please visit your Rig Manager dashboard and navigate to the History & Stats section.

Within the Active Workers table, check the XNSUB column located on the far right.

Addressing XNSUB Incompatibilities on NiceHash

Your rig may not support XNSUB due to the following reasons:

1. The device supports XNSUB, but the user has not enabled it
2. The device lacks XNSUB support

1. Enabling XNSUB on your device for NiceHash

To enable the extranonce subscribe extension (XNSUB) on your ASIC or mining software, append the XNSUB extension at the end of your stratum line. This is usually done using the # command as demonstrated below:

stratum+tcp://equihash.auto.nicehash.com:9200#xnsub

2. The #xnsub string fails to enable XNSUB

If appending #xnsub does not activate XNSUB, it likely indicates that your device does not support this extension. In this scenario, we recommend updating your firmware to the latest version. Recent updates from manufacturers often include XNSUB support.

Additional support

If you continue to face issues post-firmware update, please contact our support team (support@nicehash.com) for assistance. We encourage you to consult with your manufacturer or firmware developer regarding XNSUB support implementation. Technical documentation can be found here.