public static function init()
    {

        self::$_createCustomerSignature = [
            self::$_transparentRedirectKeys,
            ['customer' => CustomerGateway::createSignature()],
            ];
        self::$_updateCustomerSignature = [
            self::$_transparentRedirectKeys,
            'customerId',
            ['customer' => CustomerGateway::updateSignature()],
            ];
        self::$_transactionSignature = [
            self::$_transparentRedirectKeys,
            ['transaction' => TransactionGateway::createSignature()],
            ];
        self::$_createCreditCardSignature = [
            self::$_transparentRedirectKeys,
            ['creditCard' => CreditCardGateway::createSignature()],
            ];
        self::$_updateCreditCardSignature = [
            self::$_transparentRedirectKeys,
            'paymentMethodToken',
            ['creditCard' => CreditCardGateway::updateSignature()],
            ];
    }