When creating blinded paths for receiving onion messages or payments, allow using the recipient's only peer as the introduction node when the recipient is unannounced. This allows for sending messages or payments without going through an intermediary, which is useful for testing or when only connected to an LSP with an empty NetworkGraph.
Also add support for paying through a BlindedPath where we are the introduction node.
When creating blinded paths for receiving onion messages or payments, allow using the recipient's only peer as the introduction node when the recipient is unannounced. This allows for sending messages or payments without going through an intermediary, which is useful for testing or when only connected to an LSP with an empty
NetworkGraph.Also add support for paying through a
BlindedPathwhere we are the introduction node.Fixes #2952.