return $token
  ? $token_type && $token_type eq 'pc_pay'
     ? { signal => 'pc_token_found', signal_param => { card_id => $token } }
     : { signal => 'token_found' }
  : { signal => 'token_not_found'}
  ;
===
my $result;
if ( $token ) {
  if ( $token_type && $token_type eq 'pc_token' )  {
     $result = { signal => 'pc_token', signal_param => { card_id => $token } };
  }
  else {
     $result = { signal => 'token_found' };
  }
 }
 else {
   $result = { signal => 'token_not_found' };
 }

 return $result;