public static function add_payment_method_action() {
		if ( isset( $_POST['woocommerce_add_payment_method'], $_POST['payment_method'] ) ) {
			wc_nocache_headers();

			$nonce_value = wc_get_var( $_REQUEST['woocommerce-add-payment-method-nonce'], wc_get_var( $_REQUEST['_wpnonce'], '' ) ); // @codingStandardsIgnoreLine.

			if ( ! wp_verify_nonce( $nonce_value, 'woocommerce-add-payment-method' ) ) {
				return;
			}

			if ( ! apply_filters( 'woocommerce_add_payment_method_form_is_valid', true ) ) {
				return;
			}

			// Test rate limit.
			$current_user_id = get_current_user_id();
			$rate_limit_id   = 'add_payment_method_' . $current_user_id;
			$delay           = (int) apply_filters( 'woocommerce_payment_gateway_add_payment_method_delay', 20 );

			if ( WC_Rate_Limiter::retried_too_soon( $rate_limit_id ) ) {
				wc_add_notice(
					sprintf(
						/* translators: %d number of seconds */
						_n(
							'You cannot add a new payment method so soon after the previous one. Please wait for %d second.',
							'You cannot add a new payment method so soon after the previous one. Please wait for %d seconds.',
							$delay,
							'woocommerce'
						),
						$delay
					),
					'error'
				);
				return;
			}

			WC_Rate_Limiter::set_rate_limit( $rate_limit_id, $delay );

			ob_start();

			$payment_method_id  = wc_clean( wp_unslash( $_POST['payment_method'] ) );
			$available_gateways = WC()->payment_gateways->get_available_payment_gateways();

			if ( isset( $available_gateways[ $payment_method_id ] ) ) {
				$gateway = $available_gateways[ $payment_method_id ];

				if ( ! $gateway->supports( 'add_payment_method' ) && ! $gateway->supports( 'tokenization' ) ) {
					wc_add_notice( __( 'Invalid payment gateway.', 'woocommerce' ), 'error' );
					return;
				}

				$gateway->validate_fields();

				if ( wc_notice_count( 'error' ) > 0 ) {
					return;
				}

				$result = $gateway->add_payment_method();

				if ( 'success' === $result['result'] ) {
					wc_add_notice( __( 'Payment method successfully added.', 'woocommerce' ) );
				}

				if ( 'failure' === $result['result'] ) {
					wc_add_notice( __( 'Unable to add payment method to your account.', 'woocommerce' ), 'error' );
				}

				if ( ! empty( $result['redirect'] ) ) {
					wp_redirect( $result['redirect'] ); //phpcs:ignore WordPress.Security.SafeRedirect.wp_redirect_wp_redirect
					exit();
				}
			}
		}
	}