f - mention in docs that node must be announced

Author: jkczyz

lightning/src/ln/channelmanager.rs

@@ -7075,7 +7075,9 @@ where
 	/// [`ChannelManager`] when handling [`InvoiceRequest`] messages for the offer.
 	///
 	/// Uses a one-hop [`BlindedPath`] for the offer with [`ChannelManager::get_our_node_id`] as the
-	/// introduction node and a derived signing pubkey for recipient privacy.
+	/// introduction node and a derived signing pubkey for recipient privacy. As such, currently,
+	/// the node must be announced. Otherwise, there is no way to find a path to the introduction
+	/// node in order to send the [`InvoiceRequest`].
 	///
 	/// [`Offer`]: crate::offers::offer::Offer
 	/// [`InvoiceRequest`]: crate::offers::invoice_request::InvoiceRequest
@@ -7099,7 +7101,9 @@ where
 	/// The provided `payment_id` is used to ensure that only one invoice is paid for the refund.
 	///
 	/// Uses a one-hop [`BlindedPath`] for the refund with [`ChannelManager::get_our_node_id`] as
-	/// the introduction node and a derived payer id for sender privacy.
+	/// the introduction node and a derived payer id for sender privacy. As such, currently, the
+	/// node must be announced. Otherwise, there is no way to find a path to the introduction node
+	/// in order to send the [`Bolt12Invoice`].
 	///
 	/// [`Refund`]: crate::offers::refund::Refund
 	/// [`Bolt12Invoice`]: crate::offers::invoice::Bolt12Invoice