// Sandbox-Company Name: TruckingSand
// Sandbox user: little10
// Sandbox password: 8Wastrinkenwir?
// Sandbox Pet Name: Simon (default)
// Transaction Key: 9Kat68h7SACdj97M
// Signature Key: 5CD432FAF70C3E0280269F1AEFFB4A0DE34DD2D21387DC301880E888A7F54683328F3925CD1A3121CCF9970ED92A9EC36980D97B54F2BC698571DC926995B9FE
// Public Client Key: 3Nn6PNc4Rv8995Ud8jVx3B2yRc6Zw8Va9Ufve9Fcp7q6ruNy5pHyK6GMEaYbCrPX
class PaymentProcessing {
public function __construct() {
self::$merchAuth || self::_init();
}
private function endpoint() {
global $_ENV;
public function getExpiring() {
}
public function
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