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This commit updates route construction to backfill the fields required for payment to blinded paths and set amount to forward and expiry fields to zero for intermediate hops (as is instructed in the route blinding specification). We could attempt to do this in the first pass, but that loop relies on fields like amount to forward and expiry to calculate each hop backwards, so we keep it simple (stupid) and post processes the blinded portion, since it's computationally cheap and more readable.
routing
The routing package implements authentication+validation of channel announcements, pruning of the channel graph, path finding within the network, sending outgoing payments into the network and synchronizing new peers to our channel graph state.
Installation and Updating
$ go get -u github.com/lightningnetwork/lnd/routing