Julien

Thank you for the replies.
 
I was hoping to not have to do a plugin but I guess for now that's the route to go. Thanks all for your inputs, I do really appreciate it.

It a 5 min interval, if the registrar take days to activate he will come with email error every 5 mins. His inbox will become bomberder from blesta.
 

When Blesta provisions a service and attempts to use your module to register a domain, it expects that the service be made active, so the module should create the domain and return success, or not create the domain and return failure. So you should determine whether the registrar creates the domain on the account regardless of any technical issues that might arise which they will later attempt to resolve.

the best approuch to add the service, then show a message if is not yet active .
create a plugin that use cron to check the domain if active or not, after it activated then sync renew date if needed.