Warning: Incoming Hard Fork
On block 552,960 (on June 19 2020 around 3 AM UTC) Grin Floonet will hard fork. As such the
proof of work will change.
If you are mining with the secondary PoW (C29) you must upgrade your mining software to a compatible version: cuckarooz29. If you don't, your shares will be rejected.
Grin v4.0.0 is a network wide upgrade. Apart from updating their binaries in order to transact after the upgrade, users are not required to do anything. Stored grins will not be affected. Beware of scams telling you to move your coins anywhere.More details available here.