routing+routerrpc: isolate payment session source from mission control

lnrpc/routerrpc/config.go

@@ -0,0 +1,28 @@
+package routerrpc
+
+import (
+	"time"
+
+	"github.com/lightningnetwork/lnd/lnwire"
+)
+
+// RoutingConfig contains the configurable parameters that control routing.
+type RoutingConfig struct {
+	// PenaltyHalfLife defines after how much time a penalized node or
+	// channel is back at 50% probability.
+	PenaltyHalfLife time.Duration
+
+	// PaymentAttemptPenalty is the virtual cost in path finding weight
+	// units of executing a payment attempt that fails. It is used to trade
+	// off potentially better routes against their probability of
+	// succeeding.
+	PaymentAttemptPenalty lnwire.MilliSatoshi
+
+	// MinProbability defines the minimum success probability of the
+	// returned route.
+	MinRouteProbability float64
+
+	// AprioriHopProbability is the assumed success probability of a hop in
+	// a route when no other information is available.
+	AprioriHopProbability float64
+}