LNDK code reading

LndkOnionMessenger handles sending and receiving messages.

produce_outgoing_message_events subscribes to LND RPCs and get incoming messages. When it got an incoming message, push it to an event channel.

consume_messanger_events handles all onion messages

https://github.com/lndk-org/lndk/blob/259de8b8ef0916393a47d96076db518cf94651f9/src/onion_messenger.rs#L656

How to send invoice requests?

send_invoice_request

send_invoice_request put a invoice request message into a vector pending_messages. This is hold by message handler.

onion messanger consumes messenger events in the handler. This is executed by LDK not LNDK.

next_onion_message_for_peer enques events in handler to onion messenger and then onion messenger handles the events. In LNDK we delegate sending process to LND by relay_outgoing_msg_event function.

create_reply_path

blind path は常に 1 hop?