ty() ) {
			$errors->add( 'error', __( 'The provided checkout link was out of date or invalid. No products were added to the cart.', 'woocommerce' ) );

			if ( ! wc()->session->has_session() ) {
				return add_query_arg( 'wc_error', rawurlencode( $errors->get_error_message() ), wc_get_cart_url() );
			} else {
				$this->add_error_notices( $errors );
			}

			return wc_get_cart_url();
		}

		// Apply coupon if provided.
		$coupon = wc_format_coupon_code( wp_unslash( $_GET['coupon'] ?? '' ) ); // phpcs:ignore WordPress.Security.NonceVerification.Recommended, WordPress.Security.ValidatedSanitizedInput.InputNotSanitized

		if ( wc_coupons_enabled() && ! empty( $coupon ) ) {
			try {
				$controller->apply_coupon( $coupon );
			} catch ( \Exception $e ) {
				$errors->add( 'error', $e->getMessage() );
			}
		}

		// Add error notices to the cart. This requires a session otherwise the notices will not be displayed.
		$this->add_error_notices( $errors );

		$redirect_url = wc_get_checkout_url();

		// Preserve the query string--pass it to the checkout page.
		if ( ! empty( $_SERVER['QUERY_STRING'] ) ) {
			$redirect_url = remove_query_arg(
				[
					'products',
					'coupon',
					'checkout-link',
				],
				add_query_arg( wp_unslash( $_SERVER['QUERY_STRING'] ), '', $redirect_url ) // phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized
			);
		}

		// If the user is logged in, the session is tied to the user ID. Do not use a cart token.
		if ( ! is_user_logged_in() ) {
			$session_token = CartTokenUtils::get_cart_token( (string) wc()->session->get_customer_id() );
			$redirect_url  = add_query_arg( 'session', $session_token, $redirect_url );
		}

		return $redirect_url;
	}
}