my $reference_account = $self->reference_account;
croak "can't find reference account (link = AR/AP) for invoice" unless ref $reference_account;
- my $memo = $params{'memo'} || '';
- my $source = $params{'source'} || '';
+ my $memo = $params{memo} // '';
+ my $source = $params{source} // '';
my $rounded_params_amount = _round( $params{amount} ); # / $exchangerate);
my $fx_gain_loss_amount = 0; # for fx_gain and fx_loss