Getting IP Address of User

Hello,

I am writing my banks credit card processing, and my bank requires ip address of the client,  I cant use
Request.ServerVariables["REMOTE_ADDR"].ToString() inside class. What can i do? Is there anyplace where i can get current user's ip Address?

Thanks

Ahmet TOK

I found solution, for folks that might need the same:
NopContext.Current.UserHostAddress;