+ /**
+ * Watches a channel identified by `funding_txo` using `monitor`.
+ *
+ * Implementations are responsible for watching the chain for the funding transaction along
+ * with any spends of outputs returned by [`get_outputs_to_watch`]. In practice, this means
+ * calling [`block_connected`] and [`block_disconnected`] on the monitor.
+ *
+ * Note: this interface MUST error with `ChannelMonitorUpdateErr::PermanentFailure` if
+ * the given `funding_txo` has previously been registered via `watch_channel`.
+ *
+ * [`get_outputs_to_watch`]: channelmonitor::ChannelMonitor::get_outputs_to_watch
+ * [`block_connected`]: channelmonitor::ChannelMonitor::block_connected
+ * [`block_disconnected`]: channelmonitor::ChannelMonitor::block_disconnected
+ */
+ public Result_NoneChannelMonitorUpdateErrZ watch_channel(OutPoint funding_txo, ChannelMonitor monitor) {
+ long ret = bindings.Watch_watch_channel(this.ptr, funding_txo == null ? 0 : funding_txo.ptr & ~1, monitor == null ? 0 : monitor.ptr & ~1);
+ Reference.reachabilityFence(this);
+ Reference.reachabilityFence(funding_txo);
+ Reference.reachabilityFence(monitor);
+ if (ret >= 0 && ret <= 4096) { return null; }
+ Result_NoneChannelMonitorUpdateErrZ ret_hu_conv = Result_NoneChannelMonitorUpdateErrZ.constr_from_ptr(ret);
+ return ret_hu_conv;
+ }
+
+ /**
+ * Updates a channel identified by `funding_txo` by applying `update` to its monitor.
+ *
+ * Implementations must call [`update_monitor`] with the given update. See
+ * [`ChannelMonitorUpdateErr`] for invariants around returning an error.
+ *
+ * [`update_monitor`]: channelmonitor::ChannelMonitor::update_monitor
+ */