##
...XML FILE...
####
$client = SOAP::Lite
-> proxy($endpoint);
$client->soapversion('1.1');
$client->on_action(sub {"http://tempuri.org/getStamp"});
$client->autotype(0);
$client->default_ns($namespace);
$res = $client->getStamp($xml_file);
####
$method = SOAP::Data->name('getStamp')->attr({xmlns => $namespace});
$res = $client->call('getStamp',
SOAP::Data->name('getStamp')->attr({xmnls => $namespace})->value($xml_file)
);
####
...XML FILE...