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编辑当前文件:/var/www/cognitio.in/wp-content/plugins/stripe-payments/includes/class-asp-pp-ajax.php

<?php

class ASP_PP_Ajax {

protected $asp_main;

public function __construct() {
		if ( wp_doing_ajax() ) {
			//          ASP_Utils::set_custom_lang_if_needed();
			$this->asp_main = AcceptStripePayments::get_instance();
			add_action( 'init', array( $this, 'add_ajax_handlers' ), 2147483647 );
		}
	}

public function add_ajax_handlers() {
		add_action( 'wp_ajax_asp_pp_create_pi', array( $this, 'handle_create_pi' ) );
		add_action( 'wp_ajax_nopriv_asp_pp_create_pi', array( $this, 'handle_create_pi' ) );

add_action( 'wp_ajax_asp_pp_confirm_pi', array( $this, 'handle_confirm_pi' ) );
		add_action( 'wp_ajax_nopriv_asp_pp_confirm_pi', array( $this, 'handle_confirm_pi' ) );

add_action( 'wp_ajax_asp_3ds_result', array( $this, 'handle_3ds_result' ) );
		add_action( 'wp_ajax_nopriv_asp_3ds_result', array( $this, 'handle_3ds_result' ) );

add_action( 'wp_ajax_asp_pp_save_form_data', array( $this, 'save_form_data' ) );
		add_action( 'wp_ajax_nopriv_asp_pp_save_form_data', array( $this, 'save_form_data' ) );

add_action( 'wp_ajax_asp_pp_payment_error', array( $this, 'pp_payment_error' ) );
		add_action( 'wp_ajax_nopriv_asp_pp_payment_error', array( $this, 'pp_payment_error' ) );

add_action( 'wp_ajax_asp_pp_check_coupon', array( $this, 'handle_check_coupon' ) );
		add_action( 'wp_ajax_nopriv_asp_pp_check_coupon', array( $this, 'handle_check_coupon' ) );
	}

public function handle_3ds_result() {
		$pi_cs = filter_input( INPUT_GET, 'payment_intent_client_secret', FILTER_SANITIZE_STRING );
		$pi_cs = empty( $pi_cs ) ? '' : $pi_cs;
		?>
<!DOCTYPE html>
<html>
<head>
	<style>
	body,html {
		background-color: transparent !important;
		width: 100%;
		height: 100%;
	}
	</style>
</head>
<body>
	<script>
	parent.ThreeDSCompleted('<?php echo esc_js( $pi_cs ); ?>');
	</script>
</body>
</html>
		<?php
		exit;
	}

public function handle_confirm_pi() {

if ( ! check_ajax_referer( 'asp_pp_ajax_nonce', 'nonce', false ) ) {
			$out['err'] = __( 'Error occurred: Nonce verification failed.', 'stripe-payments' );
			wp_send_json( $out );
                }
		
		$asp_daily_txn_counter_obj = new ASP_Daily_Txn_Counter();
		$captcha_type = $this->asp_main->get_setting('captcha_type');
		if (empty( $captcha_type ) || $captcha_type == 'none' ) {
			//Captcha is not enabled. Lets check txn rate limiting.			
			if($asp_daily_txn_counter_obj->asp_is_daily_txn_limit_reached()) {
				$out['err'] = __( 'Error occurred: The transaction limit that you have set in settings has been reached for the day.', 'stripe-payments' );
				ASP_Debug_Logger::log($out['err'], false );

if($this->asp_main->get_setting("send_email_on_daily_txn_rate_limit")) {
					ASP_Utils::send_daily_txn_rate_limit_email($out['err']);
                                }
                                wp_send_json( $out );
			}			
		}
		else if($asp_daily_txn_counter_obj->asp_is_daily_tnx_limit_with_captcha_enabled()){
			//Captcha is enabled. Lets check txn rate limiting.
			if ($asp_daily_txn_counter_obj->asp_is_daily_txn_limit_reached(true)) {
				$out['err'] = __('Error occurred: The transaction limit that you have set in settings (with captcha) has been reached for the day.', 'stripe-payments');
				ASP_Debug_Logger::log($out['err'], false);

if ($this->asp_main->get_setting("send_email_on_daily_txn_rate_limit")) {
					ASP_Utils::send_daily_txn_rate_limit_email($out['err']);
				}
				wp_send_json($out);
			}	
		}

$product_id = filter_input( INPUT_POST, 'product_id', FILTER_SANITIZE_NUMBER_INT );

$item = new ASP_Product_Item( $product_id );

if ( $item->get_last_error() ) {
			$out['err'] = __( 'Error occurred:', 'stripe-payments' ) . ' ' . $item->get_last_error();
			wp_send_json( $out );
		}

//Log initial confirm_pi debug logging data (if debug feature is enabled).
                $txn_counter_args = $asp_daily_txn_counter_obj->asp_get_daily_txn_counter_args();
                $txn_counter_val = isset($txn_counter_args['counter'])? $txn_counter_args['counter'] : '-';
                $request_ip = ASP_Utils::get_user_ip_address();
                $confirm_pi_initial_debug = 'handle_confirm_pi() -  Product ID: ' . $product_id . ', Captcha Type: ' . $captcha_type . ', Txn Counter: ' . $txn_counter_val . ', IP: ' . $request_ip;
                ASP_Debug_Logger::log( $confirm_pi_initial_debug, true );
                //End initial confirm_pi debug logging.
                
                //Check page load signature data
                if( !ASP_Utils_Bot_Mitigation::is_page_load_signature_data_valid($product_id) ){
                    //Signature is invalid.
                    //Exit out if feature is enabled
                    $disable_signature_check = $this->asp_main->get_setting( 'disable_page_load_signature_check' );
                    if ( $disable_signature_check ) {
                        //The signature check feature is disabled. We will allow this request to go through.
                        ASP_Debug_Logger::log( 'Notice! The page load signature check feature is disabled in the advanced settings menu so this request will not be blocked.', false );
                    } else {
                        $out['err'] = __( 'Error! Page load signature check failed.', 'stripe-payments' );
                        wp_send_json( $out );
                    }
                }
                
                //Check request limit count per IP address
                if( !ASP_Utils_Bot_Mitigation::is_request_limit_reached_for_ip() ){
                    //Request limit reached for this IP.
                    //Exit out if feature is enabled
                    $disable_request_limit_check = $this->asp_main->get_setting( 'disable_request_limit_per_ip_check' );
                    if ( $disable_request_limit_check ) {
                        //The request limit check feature is disabled. We will allow this request to go through.
                        ASP_Debug_Logger::log( 'Notice! The transaction request limit per IP address feature is disabled in the advanced settings menu so this request will not be blocked.', false );
                    } else {
                        $out['err'] = __( 'Error! Transaction request limit reached for this IP address.', 'stripe-payments' );
                        wp_send_json( $out );
                    }
                }                
                
		$item = apply_filters( 'asp_ng_pp_product_item_override', $item );

//Trigger some action hooks (useful for other checks).
		do_action( 'asp_ng_before_token_request', $item );
                //ASP_Debug_Logger::log( 'handle_confirm_pi() - Captcha response checked.', true );
                
                //This hook will be used to do additional captcha (if enabled) parameter checks for bot mitigation.
                $params = array();
                do_action( 'asp_ng_do_additional_captcha_response_check', $item, $params );

do_action( 'asp_ng_product_mode_keys', $product_id );

$pi_id = filter_input( INPUT_POST, 'pi_id', FILTER_SANITIZE_STRING );
		$opts  = filter_input( INPUT_POST, 'opts', FILTER_SANITIZE_STRING );

if ( ! empty( $opts ) ) {
			$opts = html_entity_decode( $opts );
			$opts = json_decode( $opts, true );
		} else {
			$opts = array();
		}

$opts['use_stripe_sdk'] = false;

$home_url = admin_url( 'admin-ajax.php' );

$disable_3ds_iframe = $this->asp_main->get_setting( 'disable_3ds_iframe' );

if ( ! $disable_3ds_iframe ) {
			$url_opts = array( 'action' => 'asp_3ds_result' );
		} else {
			$url_opts = array(
				'action'  => 'asp_next_action_results',
				'is_live' => $this->asp_main->is_live,
			);
		}

$return_url = add_query_arg( $url_opts, $home_url );

$opts['return_url'] = $return_url;

$opts = apply_filters( 'asp_ng_confirm_pi_opts', $opts, $pi_id );

try {
			ASP_Utils::load_stripe_lib();
			$key = $this->asp_main->is_live ? $this->asp_main->APISecKey : $this->asp_main->APISecKeyTest;
			\Stripe\Stripe::setApiKey( $key );

$api = ASP_Stripe_API::get_instance();
			$api->set_param( 'throw_exception', true );
			$api->set_api_key( $key );

if ( ! ASP_Utils::use_internal_api() ) {
				$pi = \Stripe\PaymentIntent::retrieve( $pi_id );
			} else {
				$pi = $api->get( 'payment_intents/' . $pi_id );
				if ( false === $pi ) {
					$err = $api->get_last_error();
					throw new \Exception( $err['message'], isset( $err['error_code'] ) ? $err['error_code'] : null );
				}
			}
			if ( 'succeeded' === $pi->status ) {
				$out['pi_id'] = $pi->id;
				wp_send_json( $out );
			}
			if ( ! ASP_Utils::use_internal_api() ) {
				$pi->confirm( $opts );
			} else {
				$pi = $api->post(
					'payment_intents/' . $pi_id . '/confirm',
					$opts
				);
				if ( false === $pi ) {
					$err = $api->get_last_error();
					throw new \Exception( $err['message'], isset( $err['error_code'] ) ? $err['error_code'] : null );
				}
			}
		} catch ( \Throwable $e ) {
			$out['err'] = __( 'Stripe API error occurred:', 'stripe-payments' ) . ' ' . $e->getMessage();
			$order      = new ASP_Order_Item();
			if ( false !== $order->find( 'pi_id', $pi_id ) ) {
				$order->change_status( 'error', $out['err'] );
			}
			$body  = __( 'Following error occurred during payment processing:', 'stripe-payments' ) . "\r\n\r\n";
			$body .= $out['err'] . "\r\n\r\n";
			$body .= __( 'Debug data:', 'stripe-payments' ) . "\r\n";
                        $post_data = filter_var( $_POST, FILTER_SANITIZE_STRING, FILTER_REQUIRE_ARRAY );
                        $post_data_str = http_build_query( $post_data, '', '; ' );
			$body .= $post_data_str;
			ASP_Debug_Logger::log( __( 'Following error occurred during payment processing:', 'stripe-payments' ) . ' ' . $out['err'], false );
			ASP_Utils::send_error_email( $body );
			wp_send_json( $out );
		}

$out['pi_id'] = $pi->id;

if ( isset( $pi->next_action ) ) {
			$out['redirect_to'] = $pi->next_action->redirect_to_url->url;
			$out['use_iframe']  = ! $disable_3ds_iframe;
		}

$out = apply_filters( 'asp_ng_confirm_pi_result_out', $out, $pi_id );

wp_send_json( $out );
	}

public function handle_create_pi() {
		
		$out            = array();
		$out['success'] = false;
		$product_id     = filter_input( INPUT_POST, 'product_id', FILTER_SANITIZE_NUMBER_INT );
		$amount         = filter_input( INPUT_POST, 'amount', FILTER_SANITIZE_NUMBER_FLOAT );
		$curr           = filter_input( INPUT_POST, 'curr', FILTER_SANITIZE_STRING );
		$pi_id          = filter_input( INPUT_POST, 'pi', FILTER_SANITIZE_STRING );
		$cust_id        = filter_input( INPUT_POST, 'cust_id', FILTER_SANITIZE_STRING );
		$quantity       = filter_input( INPUT_POST, 'quantity', FILTER_SANITIZE_NUMBER_INT );
                $nonce          = filter_input( INPUT_POST, 'nonce', FILTER_SANITIZE_STRING );

//Check create_pi nonce
                if ( ! wp_verify_nonce( $nonce, 'asp_pp_ajax_create_pi_nonce' ) ) {
			$out['err'] = __( 'Error occurred: Nonce security verification failed.', 'stripe-payments' );
			wp_send_json( $out );
                }
		$asp_daily_txn_counter_obj = new ASP_Daily_Txn_Counter();
		$captcha_type = $this->asp_main->get_setting('captcha_type');
		if (empty($captcha_type) || $captcha_type == 'none') {
			//Captcha is not enabled. Lets check txn rate limiting.
			if ($asp_daily_txn_counter_obj->asp_is_daily_txn_limit_reached()) {
				$out['err'] = __('Error occurred: The transaction limit that you have set in settings has been reached for the day.', 'stripe-payments');
				ASP_Debug_Logger::log($out['err'], false);

if ($this->asp_main->get_setting("send_email_on_daily_txn_rate_limit")) {
					ASP_Utils::send_daily_txn_rate_limit_email($out['err']);
				}
				wp_send_json($out);
			}
		} else if ($asp_daily_txn_counter_obj->asp_is_daily_tnx_limit_with_captcha_enabled()) {
			//Captcha is enabled. Lets check txn rate limiting.
			if ($asp_daily_txn_counter_obj->asp_is_daily_txn_limit_reached(true)) {
				$out['err'] = __('Error occurred: The transaction limit that you have set in settings (with captcha) has been reached for the day.', 'stripe-payments');
				ASP_Debug_Logger::log($out['err'], false);

if ($this->asp_main->get_setting("send_email_on_daily_txn_rate_limit")) {
					ASP_Utils::send_daily_txn_rate_limit_email($out['err']);
				}
				wp_send_json($out);
			}
		}
		
                //Log initial create_pi debug logging data (if debug feature is enabled).
                $txn_counter_args = $asp_daily_txn_counter_obj->asp_get_daily_txn_counter_args();
                $txn_counter_val = isset($txn_counter_args['counter'])? $txn_counter_args['counter'] : '-';
                $request_ip = ASP_Utils::get_user_ip_address();
                $create_pi_initial_debug = 'handle_create_pi() -  Product ID: ' . $product_id . ', Captcha Type: ' . $captcha_type . ', Txn Counter: ' . $txn_counter_val . ', IP: ' . $request_ip;
                ASP_Debug_Logger::log( $create_pi_initial_debug, true );
                //End initial create_pi debug logging.
                
                //Check page load signature data
                if( !ASP_Utils_Bot_Mitigation::is_page_load_signature_data_valid($product_id) ){
                    //Signature is invalid.
                    //Exit out if feature is enabled
                    $disable_signature_check = $this->asp_main->get_setting( 'disable_page_load_signature_check' );
                    if ( $disable_signature_check ) {
                        //The signature check feature is disabled. We will allow this request to go through.
                        ASP_Debug_Logger::log( 'Notice! The page load signature check feature is disabled in the advanced settings menu so this request will not be blocked.', false );
                    } else {
                        $out['err'] = __( 'Error! Page load signature check failed.', 'stripe-payments' );
                        wp_send_json( $out );
                    }
                }
                
                //Check request usage count per IP address
                if( !ASP_Utils_Bot_Mitigation::is_request_limit_reached_for_ip() ){
                    //Request limit reached for this IP.
                    //Exit out if feature is enabled
                    $disable_request_limit_check = $this->asp_main->get_setting( 'disable_request_limit_per_ip_check' );
                    if ( $disable_request_limit_check ) {
                        //The request limit check feature is disabled. We will allow this request to go through.
                        ASP_Debug_Logger::log( 'Notice! The transaction request limit per IP address feature is disabled in the advanced settings menu so this request will not be blocked.', false );
                    } else {
                        $out['err'] = __( 'Error! Transaction request limit reached for this IP address.', 'stripe-payments' );
                        wp_send_json( $out );
                    }
                }
                
		$item = new ASP_Product_Item( $product_id );

if ( $item->get_last_error() ) {
			$out['err'] = __( 'Error occurred:', 'stripe-payments' ) . ' ' . $item->get_last_error();
			wp_send_json( $out );
		}

if ( $item->stock_control_enabled() ) {
			$stock_items        = $item->get_stock_items();
			$out['stock_items'] = $stock_items;
			if ( $quantity > $stock_items ) {
				// translators: %d is number of items in stock
				$msg        = apply_filters( 'asp_customize_text_msg', __( 'You cannot order more items than available: %d', 'stripe-payments' ), 'stock_not_available' );
				$out['err'] = sprintf( $msg, $stock_items );
				wp_send_json( $out );
			}
		}

$min_amount = $item->get_min_amount( true );
		$prod_type  = $item->get_type();

if ( 'donation' === $prod_type && 0 !== $min_amount && $min_amount > $amount ) {
			$msg        = apply_filters( 'asp_customize_text_msg', __( 'Minimum amount is', 'stripe-payments' ), 'min_amount_is' );
			$out['err'] = $msg . ' ' . ASP_Utils::formatted_price( $min_amount, $curr, true );
			wp_send_json( $out );
		}

//Trigger some action hooks (useful for other checks).
		do_action( 'asp_ng_before_token_request', $item );
                //ASP_Debug_Logger::log( 'handle_create_pi() - Captcha response checked.', true );
                
                //This hook will be used to do additional captcha (if enabled) parameter checks for bot mitigation.
                $params = array();
                do_action( 'asp_ng_do_additional_captcha_response_check', $item, $params );

do_action( 'asp_ng_product_mode_keys', $product_id );

try {
			ASP_Utils::load_stripe_lib();
			$key = $this->asp_main->is_live ? $this->asp_main->APISecKey : $this->asp_main->APISecKeyTest;
			\Stripe\Stripe::setApiKey( $key );

$api = ASP_Stripe_API::get_instance();
			$api->set_param( 'throw_exception', true );
			$api->set_api_key( $key );

} catch ( \Exception $e ) {
			$out['err'] = __( 'Stripe API error occurred:', 'stripe-payments' ) . ' ' . $e->getMessage();
			wp_send_json( $out );
		} catch ( \Throwable $e ) {
			$out['err'] = __( 'Stripe API error occurred:', 'stripe-payments' ) . ' ' . $e->getMessage();
			wp_send_json( $out );
		}

$metadata = array();

try {

$pi_params = array(
				'amount'              => $amount,
				'currency'            => $curr,
				'confirmation_method' => 'manual',
			);

$post_billing_details = filter_input( INPUT_POST, 'billing_details', FILTER_SANITIZE_STRING );

$post_shipping_details = filter_input( INPUT_POST, 'shipping_details', FILTER_SANITIZE_STRING );

if ( isset( $post_billing_details ) ) {
				$post_billing_details = html_entity_decode( $post_billing_details );

$billing_details = json_decode( $post_billing_details );
			}

$dont_save_card = $this->asp_main->get_setting( 'dont_save_card' );

if ( ! $dont_save_card ) {
				$customer_opts = array();

if ( isset( $billing_details ) ) {

if ( ! empty( $billing_details->name ) ) {
						$customer_opts['name'] = $billing_details->name;
					}

if ( ! empty( $billing_details->email ) ) {
						$customer_opts['email'] = $billing_details->email;
					}

if ( isset( $billing_details->address ) && isset( $billing_details->address->line1 ) ) {
						//we have address
						$addr = array(
							'line1'   => $billing_details->address->line1,
							'state'   => isset( $billing_details->address->state ) ? $billing_details->address->state : null,
							'city'    => isset( $billing_details->address->city ) ? $billing_details->address->city : null,
							'country' => isset( $billing_details->address->country ) ? $billing_details->address->country : null,
						);

if ( isset( $billing_details->address->postal_code ) ) {
							$addr['postal_code'] = $billing_details->address->postal_code;
						}

$customer_opts['address'] = $addr;
					}
				}

if ( isset( $post_shipping_details ) ) {
					$post_shipping_details = html_entity_decode( $post_shipping_details );

$shipping_details = json_decode( $post_shipping_details );

$shipping = array();

if ( $shipping_details->name ) {
						$shipping['name'] = $shipping_details->name;
					} elseif ( ! empty( $customer_opts['name'] ) ) {
						$shipping['name'] = $customer_opts['name'];
					}

if ( isset( $shipping_details->address ) && isset( $shipping_details->address->line1 ) ) {
						//we have address
						$addr = array(
							'line1'   => $shipping_details->address->line1,
							'state'   => isset( $shipping_details->address->state ) ? $shipping_details->address->state : null,
							'city'    => isset( $shipping_details->address->city ) ? $shipping_details->address->city : null,
							'country' => isset( $shipping_details->address->country ) ? $shipping_details->address->country : null,
						);

if ( isset( $shipping_details->address->postal_code ) ) {
							$addr['postal_code'] = $shipping_details->address->postal_code;
						}

$shipping['address'] = $addr;

if ( ! empty( $shipping['name'] ) ) {
							$customer_opts['shipping'] = $shipping;
						}
					}
				}

$customer_opts = apply_filters( 'asp_ng_before_customer_create_update', $customer_opts, empty( $cust_id ) ? false : $cust_id );

if ( empty( $cust_id ) ) {
					if ( ASP_Utils::use_internal_api() ) {
						$api = ASP_Stripe_API::get_instance();
						$api->set_param( 'throw_exception', true );

$customer = $api->post( 'customers', $customer_opts );

} else {
						$customer = \Stripe\Customer::create( $customer_opts );
					}

$cust_id = $customer->id;
				} else {

if ( ASP_Utils::use_internal_api() ) {
						$api = ASP_Stripe_API::get_instance();
						$api->set_param( 'throw_exception', true );

$customer = $api->post( 'customers/' . $cust_id, $customer_opts );

} else {
						$customer = \Stripe\Customer::update( $cust_id, $customer_opts );
					}
				}
				$pi_params['customer'] = $cust_id;
			}

$metadata['Product Name'] = $item->get_name();
			$metadata['Product ID']   = $product_id;

if ( isset( $metadata ) && ! empty( $metadata ) ) {
				$pi_params['metadata'] = $metadata;
			}
			$description = $item->get_description();
			if ( ! empty( $description ) ) {
				$pi_params['description'] = $description;
			} else {
				$pi_params['description'] = $item->get_name();
			}

$stripe_receipt_email = $this->asp_main->get_setting( 'stripe_receipt_email' );

if ( $stripe_receipt_email ) {
				if ( isset( $billing_details ) && isset( $billing_details->email ) && ! empty( $billing_details->email ) ) {
					$pi_params['receipt_email'] = $billing_details->email;
				}
			}

$order = new ASP_Order_Item();

if ( $order->can_create( $product_id ) ) {

if ( ! $pi_id ) {
					//create new incomplete order for this payment
					$order->create( $product_id, $pi_id );
				} else {
					//find order for this PaymentIntent
					$order->find( 'pi_id', $pi_id );
				}
			}

$pi_params = apply_filters( 'asp_ng_before_pi_create_update', $pi_params );
			if ( $pi_id ) {
				if ( ASP_Utils::use_internal_api() ) {
					$api = ASP_Stripe_API::get_instance();
					$api->set_param( 'throw_exception', true );

$intent = $api->post( 'payment_intents/' . $pi_id, $pi_params );
				} else {
					$intent = \Stripe\PaymentIntent::update( $pi_id, $pi_params );
				}
			} else {
				if ( ASP_Utils::use_internal_api() ) {
					$api = ASP_Stripe_API::get_instance();
					$api->set_param( 'throw_exception', true );

$intent = $api->post( 'payment_intents', $pi_params );
				} else {
					$intent = \Stripe\PaymentIntent::create( $pi_params );
				}
			}
		} catch ( \Exception $e ) {
			$out['shipping'] = isset( $shipping ) ? wp_json_encode( $shipping ) : null;
			$out['err']      = __( 'Error occurred:', 'stripe-payments' ) . ' ' . $e->getMessage();
			wp_send_json( $out );
		} catch ( \Throwable $e ) {
			$out['shipping'] = isset( $shipping ) ? wp_json_encode( $shipping ) : null;
			$out['err']      = __( 'Error occurred:', 'stripe-payments' ) . ' ' . $e->getMessage();
			wp_send_json( $out );
		}

if ( $order->get_id() ) {
			update_post_meta( $order->get_id(), 'pi_id', $intent->id );
		}

$out['success']      = true;
		$out['clientSecret'] = $intent->client_secret;
		$out['pi_id']        = $intent->id;
		$out['cust_id']      = $cust_id;
		$out                 = apply_filters( 'asp_ng_before_pi_result_send', $out, $intent );
		wp_send_json( $out );
	}

public function save_form_data() {
                if ( ! check_ajax_referer( 'asp_pp_ajax_nonce', 'nonce', false ) ) {
			$out['err'] = __( 'Error occurred: Nonce verification failed on save_form_data().', 'stripe-payments' );
			wp_send_json( $out );
                }
		$out['success'] = true;
		$sess = ASP_Session::get_instance();
		wp_parse_str( $_POST['form_data'], $form_data );
                $filtered_form_data = array_map( 'sanitize_text_field', $form_data );
		$sess->set_transient_data( 'asp_pp_form_data', $filtered_form_data );
		//ASP_Debug_Logger::log( 'Saved form data: ' . json_encode( $filtered_form_data ) );
		wp_send_json( $out );
	}

public function handle_check_coupon() {
		$product_id = filter_input( INPUT_POST, 'product_id', FILTER_SANITIZE_NUMBER_INT );
		$item       = new ASP_Product_Item( $product_id );

if ( $item->get_last_error() ) {
			$out['err'] = __( 'Error occurred:', 'stripe-payments' ) . ' ' . $item->get_last_error();
			wp_send_json( $out );
		}

$coupon_code = filter_input( INPUT_POST, 'coupon_code', FILTER_SANITIZE_STRING );

$coupon_valid = $item->check_coupon( $coupon_code );
		if ( ! $coupon_valid ) {
			$out['err'] = $item->get_last_error();
			wp_send_json( $out );
		}

$coupon = $item->get_coupon();

$zero_value_id           = str_replace( '.', '', uniqid( 'free_', true ) );
		$coupon['zero_value_id'] = $zero_value_id;

wp_send_json( $coupon );

}

new ASP_PP_Ajax();