Email template configuration on custom payment module

[fiankurniawan]

I am creating a custom payment module, which connects to some bank payment gateway, all work well if i set the Advance Parameters > Emails to "Never send email", but if i set it to anything but that, it throws me an "Invalid email template" error.

 

I have browse around for solutions without finding any.

 

I have put templates in 

themes/my_theme/mails/en/ (and everywhere else i can find mails folder)

 but this doesn't seem to be the issue

 

so i did a little research, apparently whats causing this is my module's validation.php 

validateOrder() => OrderHistory::addWithemail => Mail::Send()

if i do a dump on Mail::Send() arguments, my $template value is always ''

 

so my question is, where can i set this $template ?

 

i see an initiation of OrderState object inside my install method where i can have 

$orderState->template

and i have tried setting

 $orderState->template = $this->name;

also with no luck

 

 

Please help