Hi @crypto.piotr, this is a specialist area and you should be asking a legal firm specializing in such matters for assistance. Do not simply simply go to any legal firm claiming to specialize in such matters. You need to check the credentials of the lawyers in the firm who will be advising you. Ideally the lawyers should have, besides the usual legal qualifications, qualifications in IT and corporate matters and experience handling such matters for several years. It is unlikely that a single lawyer will have such qualifications and experience and therefore most likely two or more lawyers will be assigned to handle your brief.
I also suggest you check out this link: https://www.desico.io/. This seems to be a fairly new company but the fact that they are regulated by the central bank of Lithuania (Bank of Lithuania) should give you a lot of comfort.
Although not recommended, you could possibly ask them to refer you to their recommended legal firms. To avoid conflict of interest arising, make sure that the legal firm is not also legal advisers to Desico.