i was wondering if i could use

 set %getaddy.chan 

but i didnt know which one was better

This

 on *:text:!getaddy &:#:{ 
  .enable #whois_address 
  set %chan $chan 
  .whois $$2 
} 

Or this

 on *:text:!getaddy &:#:{ 
  .enable #whois_address 
  set %getaddy.chan 
  .whois $$2 
}