Whenever I’ve encountered this, I’ve always given a range of where my base salary is in addition to my total compensation. It’s only been a problem a few times in which they wanted exact numbers. To which the recruiter came clean and told me the max they were willing to pay for the position. In other instances I’ve explained to the hiring party that I would like what’s considered fair in alignment with what the position pays based on skillsets and other attributes of the role.