Add support for v0.11 GRPC services

This also refactors the client GRPC wrapper to dynamically load the
request objects.
All GRPC generated client files now live under lib/grpc_services

lib/grpc_services/routerrpc/router_services_pb.rb

@@ -0,0 +1,86 @@
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# Source: routerrpc/router.proto for package 'routerrpc'
+
+require 'grpc'
+require 'routerrpc/router_pb'
+
+module Routerrpc
+  module Router
+    # Router is a service that offers advanced interaction with the router
+    # subsystem of the daemon.
+    class Service
+
+      include GRPC::GenericService
+
+      self.marshal_class_method = :encode
+      self.unmarshal_class_method = :decode
+      self.service_name = 'routerrpc.Router'
+
+      #
+      # SendPaymentV2 attempts to route a payment described by the passed
+      # PaymentRequest to the final destination. The call returns a stream of
+      # payment updates.
+      rpc :SendPaymentV2, SendPaymentRequest, stream(Lnrpc::Payment)
+      #
+      # TrackPaymentV2 returns an update stream for the payment identified by the
+      # payment hash.
+      rpc :TrackPaymentV2, TrackPaymentRequest, stream(Lnrpc::Payment)
+      #
+      # EstimateRouteFee allows callers to obtain a lower bound w.r.t how much it
+      # may cost to send an HTLC to the target end destination.
+      rpc :EstimateRouteFee, RouteFeeRequest, RouteFeeResponse
+      #
+      # Deprecated, use SendToRouteV2. SendToRoute attempts to make a payment via
+      # the specified route. This method differs from SendPayment in that it
+      # allows users to specify a full route manually. This can be used for
+      # things like rebalancing, and atomic swaps. It differs from the newer
+      # SendToRouteV2 in that it doesn't return the full HTLC information.
+      rpc :SendToRoute, SendToRouteRequest, SendToRouteResponse
+      #
+      # SendToRouteV2 attempts to make a payment via the specified route. This
+      # method differs from SendPayment in that it allows users to specify a full
+      # route manually. This can be used for things like rebalancing, and atomic
+      # swaps.
+      rpc :SendToRouteV2, SendToRouteRequest, Lnrpc::HTLCAttempt
+      #
+      # ResetMissionControl clears all mission control state and starts with a clean
+      # slate.
+      rpc :ResetMissionControl, ResetMissionControlRequest, ResetMissionControlResponse
+      #
+      # QueryMissionControl exposes the internal mission control state to callers.
+      # It is a development feature.
+      rpc :QueryMissionControl, QueryMissionControlRequest, QueryMissionControlResponse
+      #
+      # QueryProbability returns the current success probability estimate for a
+      # given node pair and amount.
+      rpc :QueryProbability, QueryProbabilityRequest, QueryProbabilityResponse
+      #
+      # BuildRoute builds a fully specified route based on a list of hop public
+      # keys. It retrieves the relevant channel policies from the graph in order to
+      # calculate the correct fees and time locks.
+      rpc :BuildRoute, BuildRouteRequest, BuildRouteResponse
+      #
+      # SubscribeHtlcEvents creates a uni-directional stream from the server to
+      # the client which delivers a stream of htlc events.
+      rpc :SubscribeHtlcEvents, SubscribeHtlcEventsRequest, stream(HtlcEvent)
+      #
+      # Deprecated, use SendPaymentV2. SendPayment attempts to route a payment
+      # described by the passed PaymentRequest to the final destination. The call
+      # returns a stream of payment status updates.
+      rpc :SendPayment, SendPaymentRequest, stream(PaymentStatus)
+      #
+      # Deprecated, use TrackPaymentV2. TrackPayment returns an update stream for
+      # the payment identified by the payment hash.
+      rpc :TrackPayment, TrackPaymentRequest, stream(PaymentStatus)
+      # *
+      # HtlcInterceptor dispatches a bi-directional streaming RPC in which
+      # Forwarded HTLC requests are sent to the client and the client responds with
+      # a boolean that tells LND if this htlc should be intercepted.
+      # In case of interception, the htlc can be either settled, cancelled or
+      # resumed later by using the ResolveHoldForward endpoint.
+      rpc :HtlcInterceptor, stream(ForwardHtlcInterceptResponse), stream(ForwardHtlcInterceptRequest)
+    end
+
+    Stub = Service.rpc_stub_class
+  end
+end