+sub calc_remain {
+ my ($self, $cust_pkg) = @_;
+ my $time = time; #should be able to pass this in for credit calculation
+ my $next_bill = $cust_pkg->getfield('bill') || 0;
+ my $last_bill = $cust_pkg->last_bill || 0;
+ return 0 if ! $self->base_recur
+ || ! $self->option('unused_credit', 1)
+ || ! $last_bill
+ || ! $next_bill
+ || $next_bill < $time;
+
+ my %sec = (
+ 'h' => 3600, # 60 * 60
+ 'd' => 86400, # 60 * 60 * 24
+ 'w' => 604800, # 60 * 60 * 24 * 7
+ 'm' => 2629744, # 60 * 60 * 24 * 365.2422 / 12
+ );
+
+ $self->freq =~ /^(\d+)([hdwm]?)$/
+ or die 'unparsable frequency: '. $self->freq;
+ my $freq_sec = $1 * $sec{$2||'m'};
+ return 0 unless $freq_sec;
+
+ sprintf("%.2f", $self->base_recur * ( $next_bill - $time ) / $freq_sec );
+
+}
+
+sub is_free_options {
+ qw( setup_fee recur_fee );
+}
+
+sub is_prepaid {
+ 0; #no, we're postpaid
+}
+
+sub reset_usage {
+ my($self, $cust_pkg) = @_;
+ my %values = map { $_, $self->option($_) }
+ grep { $self->option($_) }
+ qw(seconds upbytes downbytes totalbytes);
+ $cust_pkg->set_usage(\%values);
+}
+