#======= Encode XML base64 ================================
use MIME::Base64 ;
$enco = encode_base64($wr);

#======= Send request to Payment Gateway ==================
use HTTP::Request::Common qw(POST);
use LWP::UserAgent;
$ua = LWP::UserAgent->new();
my $req = POST 'https://payment.server.com/payment/Interface'; [
type=>'hidden',
name=> 'TradeInfo',
value=> $enco,
type=>'submit',
value=>'submit',

];


$content = $ua->request($req)->as_string;
# print "Content-type: text/html\n\n";
print $content;