onionmessage_forward_fail -- Notification for onion message forwarding failures

DESCRIPTION

Notification added in v24.11.

The onionmessage_forward_fail notification informs whenever lightningd cannot forward an onion message.

source (pubkey): The node that sent the incoming onion message.
incoming (hex): The incoming onion message payload.
path_key (pubkey): The path key used for the attempted forward.
outgoing (hex, optional): The outgoing onion message payload if a next hop had already been selected.
next_node_id (pubkey, optional): The next node id for the attempted forward when the next hop is a node.
next_short_channel_id_dir (short_channel_id_dir, optional): The next short_channel_id_dir for the attempted forward when the next hop is a channel.