f - Update failure to query Channel error messages 2

Update message for update_channel_config API

Author: ViktorTigerstrom

lightning/src/ln/channelmanager.rs

@@ -3107,7 +3107,7 @@ impl<Signer: Sign, M: Deref, T: Deref, K: Deref, F: Deref, L: Deref> ChannelMana
 				for channel_id in channel_ids {
 					if !peer_state.channel_by_id.contains_key(channel_id) {
 						return Err(APIError::ChannelUnavailable {
-							err: format!("Channel with ID {} was not found", log_bytes!(*channel_id)),
+							err: format!("Channel with ID {} was not found for the passed counterparty_node_id {}", log_bytes!(*channel_id), counterparty_node_id),
 						});
 					}
 				}
@@ -3125,6 +3125,8 @@ impl<Signer: Sign, M: Deref, T: Deref, K: Deref, F: Deref, L: Deref> ChannelMana
 						});
 					}
 				}
+			} else {
+				return Err(APIError::APIMisuseError{ err: format!("Can't find a peer with a node_id matching the passed counterparty_node_id {}", counterparty_node_id) });
 			}
 		}
 		Ok(())