NewCachedPolicy turns a full policy into a minimal one that can be cached.

NewInboundFeeFromWire constructs an inbound fee structure from a wire fee.

ErrInvalidCircuitKeyLen signals that a circuit key could not be decoded because the byte slice is of an invalid length.

CachedEdgePolicy is a struct that only caches the information of a ChannelEdgePolicy that we actually use for pathfinding and therefore need to store in the cache.

ChannelAuthProof is the authentication proof (the signature portion) for a channel.

ChannelEdgeInfo represents a fully authenticated channel along with all its unique attributes.

ChannelEdgePolicy represents a *directed* edge within the channel graph.

CircuitKey is used by a channel to uniquely identify the HTLCs it receives from the switch, and is used to purge our in-memory state of HTLCs that have already been processed by a link.

ForwardingPolicy describes the set of constraints that a given ChannelLink is to adhere to when forwarding HTLC's.