Can I use US dollars in Sudan?

I'm curious about the use of US dollars in Sudan. Is it possible to use American currency there for transactions, or are there any restrictions or limitations I should be aware of? I've heard that some countries have strict regulations on foreign currencies, so I'm wondering if Sudan is one of them. Additionally, if US dollars are accepted, are there any specific places or situations where they are more commonly used than others? I'd appreciate any insights or advice you can provide on this topic.