Support paying static invoices

lightning/src/ln/channelmanager.rs

@@ -11106,7 +11106,7 @@ where
 	fn release_held_htlc(&self, _message: ReleaseHeldHtlc, _context: AsyncPaymentsContext) {}
 
 	fn release_pending_messages(&self) -> Vec<(AsyncPaymentsMessage, MessageSendInstructions)> {
-		Vec::new()
+		core::mem::take(&mut self.pending_async_payments_messages.lock().unwrap())
 	}
 }
 

lightning/src/onion_message/messenger.rs

@@ -1765,6 +1765,14 @@ where
 			);
 		}
 
+		#[cfg(async_payments)] {
+			for (message, instructions) in self.async_payments_handler.release_pending_messages() {
+				let _ = self.send_onion_message_internal(
+					message, instructions, format_args!("when sending AsyncPaymentsMessage")
+				);
+			}
+		}
+
 		// Enqueue any initiating `CustomMessage`s to send.
 		for (message, instructions) in self.custom_handler.release_pending_custom_messages() {
 			let _ = self.send_onion_message_internal(