protected function generate_refund_id( $method, $amount, $note = '' ) {

		if ( 'manual' === $method ) {
			/**
			 * Filters the refund id for manual refunds.
			 *
			 * The default refund ID is a microtime string generated by `uniqid()`.
			 *
			 * @since 3.0.0
			 *
			 * @param string $refund_id The refund ID.
			 */
			$refund_id = apply_filters( 'llms_manual_refund_id', (string) uniqid() );
		} elseif ( 'gateway' === $method ) {
			$refund_id = $this->process_refund_via_gateway( $amount, $note );
		} else {
			/**
			 * Filters the refund ID for custom refund methods.
			 *
			 * This filter should return a string representing the refund ID as generated by the custom refund method.
			 *
			 * The dynamic portion of this hook, `{$method}`, represents the ID of the custom refund method.
			 *
			 * @since 3.0.0
			 *
			 * @param string|boolean|WP_Error $refund_id   The generated refund ID or an error object. Returning a falsy value
			 *                                             will result in the default error handling and no refund being recorded.
			 * @param string                  $method      The method ID.
			 * @param LLMS_Transaction        $transaction The transaction object.
			 * @param float                   $amount      The refund amount.
			 * @param string                  $note        The user-submitted refund note.
			 */
			$refund_id = apply_filters( "llms_{$method}_refund_id", false, $method, $this, $amount, $note );
		}

		return $refund_id;

	}