if ( false !== $retry ) {
				$server->send_header( 'RateLimit-Remaining', 0 );
				$server->send_header( 'RateLimit-Retry-After', $retry );
				$server->send_header( 'RateLimit-Reset', time() + $retry );

				/**
				 * Fires when the rate limit is exceeded.
				 *
				 * @param string $ip_address The IP address of the request.
				 * @param string $action_id  The grouping identifier to the request.
				 *
				 * @since 8.9.0
				 * @since 9.8.0 Added $action_id parameter.
				 */
				do_action(
					'woocommerce_store_api_rate_limit_exceeded',
					self::get_ip_address( $rate_limiting_options->proxy_support ),
					$action_id
				);

				return new \WP_Error(
					'rate_limit_exceeded',
					sprintf(
						'Too many requests. Please wait %d seconds before trying again.',
						$retry
					),
					array( 'status' => 400 )
				);
			}

			$rate_limit = RateLimits::update_rate_limit( $action_id );
			$server->send_header( 'RateLimit-Remaining', $rate_limit->remaining );
			$server->send_header( 'RateLimit-Reset', $rate_limit->reset );
		}

		return $result;
	}

	/**
	 * Generates the request grouping identifier for the rate limiting.
	 *
	 * @param bool $proxy_support Rate Limiting proxy support.
	 *
	 * @return string
	 */
	protected static function get_rate_limiting_id( bool $proxy_support ): string {

		if ( is_user_logged_in() ) {
			$id = (string) get_current_user_id();
		} else {
			$id = md5( self::get_ip_address( $proxy_support ) );
		}

		/**
		 * Filters the rate limiting identifier.
		 *
		 * @param string $id The rate limiting identifier.
		 *
		 * @since 9.8.0
		 */
		$id = apply_filters( 'woocommerce_store_api_rate_limit_id', $id );

		return sanitize_key( $id );
	}

	/**
	 * Check if is request to the Store API.
	 *
	 * @return bool
	 */
	protected function is_request_to_store_api() {
		if ( empty( $GLOBALS['wp']->query_vars['rest_route'] ) ) {
			return false;
		}
		return 0 === strpos( $GLOBALS['wp']->query_vars['rest_route'], '/wc/store/' );
	}

	/**
	 * Returns true only for POST requests that are NOT overridden to another method
	 * via the X-HTTP-Method-Override header (used by wp.apiFetch for PUT/DELETE).
	 *
	 * @see https://github.com/wordpress/gutenberg/blob/trunk/packages/api-fetch/src/middlewares/http-v1.ts#L21-L43
	 *
	 * @return bool
	 */
	private function is_only_post_request() {
		// Check that REQUEST_METHOD is POST.
		if ( ! isset( $_SERVER['REQUEST_METHOD'] ) || 'POST' !== $_SERVER['REQUEST_METHOD'] ) {
			return false;
		}

		// Check X-HTTP-Method-Override header if it exists and is not empty - it must also be POST.
		if ( isset( $_SERVER['HTTP_X_HTTP_METHOD_OVERRIDE'] ) ) {
			$method_override = strtoupper( sanitize_text_field( wp_unslash( $_SERVER['HTTP_X_HTTP_METHOD_OVERRIDE'] ) ) );
			if ( '' !== $method_override && 'POST' !== $method_override ) {
				return false;
			}
		}

		return true;
	}

	/**
	 * Get current user IP Address.
	 *
	 * X_REAL_IP and CLIENT_IP are custom implementations designed to facilitate obtaining a user's ip through proxies, load balancers etc.
	 *
	 * _FORWARDED_FOR (XFF) request header is a de-facto standard header for identifying the originating IP address of a client connecting to a web server through a proxy server.
	 * Note for X_FORWARDED_FOR, Proxy servers can send through this header like this: X-Forwarded-For: client1, proxy1, proxy2.
	 * Make sure we always only send through the first IP in the list which should always be the client IP.
	 * Documentation at https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/X-Forwarded-For
	 *
	 * Forwarded request header contains information that may be added by reverse proxy servers (load balancers, CDNs, and so on).
	 * Documentation at https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Forwarded
	 * Full RFC at https://datatracker.ietf.org/doc/html/rfc7239
	 *
	 * @param boolean $proxy_support Enables/disables proxy support.
	 *
	 * @return string
	 */
	protected static function get_ip_address( bool $proxy_support = false ) {

		if ( ! $proxy_support ) {
			return self::validate_ip( sanitize_text_field( wp_unslash( $_SERVER['REMOTE_ADDR'] ?? 'unresolved_ip' ) ) );
		}

		if ( array_key_exists( 'HTTP_X_REAL_IP', $_SERVER ) ) {
			return self::validate_ip( sanitize_text_field( wp_unslash( $_SERVER['HTTP_X_REAL_IP'] ) ) );
		}

		if ( array_key_exists( 'HTTP_CLIENT_IP', $_SERVER ) ) {
			return self::validate_ip( sanitize_text_field( wp_unslash( $_SERVER['HTTP_CLIENT_IP'] ) ) );
		}

		if ( array_key_exists( 'HTTP_X_FORWARDED_FOR', $_SERVER ) ) {
			$ips = explode( ',', sanitize_text_field( wp_unslash( $_SERVER['HTTP_X_FORWARDED_FOR'] ) ) );
			if ( is_array( $ips ) && ! empty( $ips ) ) {
				return self::validate_ip( trim( $ips[0] ) );
			}
		}

		if ( array_key_exists( 'HTTP_FORWARDED', $_SERVER ) ) {
			// Using regex instead of explode() for a smaller code footprint.
			// Expected format: Forwarded: for=192.0.2.60;proto=http;by=203.0.113.43,for="[2001:db8:cafe::17]:4711"...
			preg_match(
				'/(?<=for\=)[^;,]*/i', // We catch everything on the first "for" entry, and validate later.
				sanitize_text_field( wp_unslash( $_SERVER['HTTP_FORWARDED'] ) ),
				$matches
			);

			if ( strpos( $matches[0] ?? '', '"[' ) !== false ) { // Detect for ipv6, eg "[ipv6]:port".
				preg_match(
					'/(?<=\[).*(?=\])/i', // We catch only the ipv6 and overwrite $matches.
					$matches[0],
					$matches
				);
			}

			if ( ! empty( $matches ) ) {
				return self::validate_ip( trim( $matches[0] ) );
			}
		}

		return '0.0.0.0';
	}

	/**
	 * Uses filter_var() to validate and return ipv4 and ipv6 addresses
	 * Will return 0.0.0.0 if the ip is not valid. This is done to group and still rate limit invalid ips.
	 *
	 * @param string $ip ipv4 or ipv6 ip string.
	 *
	 * @return string
	 */
	protected static function validate_ip( $ip ) {
		$ip = filter_var(
			$ip,
			FILTER_VALIDATE_IP,
			array( FILTER_FLAG_NO_RES_RANGE, FILTER_FLAG_IPV6 )
		);

		return $ip ?: '0.0.0.0';
	}
}