No, there won't be an open attack, at least not yet. There will be more of those "hybrid" incursions. Russians will be gradually increasing the intensity of those operations, so that it becomes the new normal. There will never be a clear "well now they are attacking" boundary to point to.
Meanwhile, the EU is still buying fossil fuels from Russia, thus paying for all this. It boggles the mind.
Long-term contracts. Also logistics is a harsh mistress. If you have no LNG terminals, your options of buying natural gas from the US are limited.
Technically the EU is buying from India which buys from Russia. Alas prices are still high in India, since the benefit is mainly going to a few billionaires. Our billionaires are even more richer than Chinese ones while our people are poorer.