Putin has threatened so called unfriendly states to pay in rubles or have its gas supply shut off. It has said it doesn't buy things for free and so isn't going to charitable with its energy.
It will only take time, Putin is not doing his country good, he can look like he is winning now but the future will tell. I wish Russia to see what Putin is getting them into.
To be honest, if European countries don't want to freeze to death then they inevitably have to obey the rules set by Putin. This step actually looks cruel but I see this is the last step from Putin to escape the sanctions imposed on Russia.
It is totally mandatory but let us see what will happen. The EU and other European countries would have been strategizing what they will do, but I lack any comment about this for now and you may be wrong.