I think It will take about 2~3 hours for Expert
Have to know about code efficiency, gas optimization, swap, proxy, mapping,
I have code sample.
I will provide it via private chat
Please start bid with "expert".
9 фрилансеров(-а) готовы выполнить эту работу в среднем за $493
Hello hope you well. I am senior developer i can do it very easily. Over 10 years of experience on this skills. Let me discuss about this project just send a reply to discuss more. Many Thanks