3 commits

Author	SHA1	Message	Date
Jeffrey Czyz	b5be4c210c	Define Payee abstraction for use in get_route ... A payee can be identified by a pubkey and optionally have an associated set of invoice features and route hints. Use this in get_route instead of three separate parameters. This may be included in PaymentPathFailed later to use when finding a new route.	2021-10-25 10:18:11 -05:00
Jeffrey Czyz	54f490c8c1	Add source and target nodes to routing::Score ... Expand routing::Score::channel_penalty_msat to include the source and target node ids of the channel. This allows scorers to avoid certain nodes altogether if desired.	2021-10-19 13:03:02 -05:00
Jeffrey Czyz	e15a18a503	Add channel scoring to get_route ... Failed payments may be retried, but calling get_route may return a Route with the same failing path. Add a routing::Score trait used to parameterize get_route, which it calls to determine how much a channel should be penalized in terms of msats willing to pay to avoid the channel. Also, add a Scorer struct that implements routing::Score with a constant constant penalty. Subsequent changes will allow for more robust scoring by feeding back payment path success and failure to the scorer via event handling.	2021-10-15 15:29:49 -05:00