+ /**
+ * The `channel_keys_id` for the channel which this output came from.
+ *
+ * For channels which were generated on LDK 0.0.119 or later, this is the value which was
+ * passed to the [`SignerProvider::get_destination_script`] call which provided this
+ * output script.
+ *
+ * For channels which were generated prior to LDK 0.0.119, no such argument existed,
+ * however this field may still be filled in if such data is available.
+ *
+ * Note that this (or a relevant inner pointer) may be NULL or all-0s to represent None
+ */
+ public byte[] channel_keys_id;