[#444] reputation/grpc: Implement gRPC ReputationServiceServer

Implement gRPC ReputationServiceServer on structure that forwards requests
to underlying NeoFS API v2 ReputationService `Server`.

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>

pkg/network/transport/reputation/grpc/service.go

@@ -0,0 +1,37 @@
+package grpcreputation
+
+import (
+	"context"
+
+	"github.com/nspcc-dev/neofs-api-go/v2/reputation"
+	reputation2 "github.com/nspcc-dev/neofs-api-go/v2/reputation/grpc"
+	reputationrpc "github.com/nspcc-dev/neofs-node/pkg/services/reputation/rpc"
+)
+
+// Server wraps NeoFS API v2 Container service server
+// and provides gRPC Container service server interface.
+type Server struct {
+	srv reputationrpc.Server
+}
+
+// New creates, initializes and returns Server instance.
+func New(srv reputationrpc.Server) *Server {
+	return &Server{
+		srv: srv,
+	}
+}
+
+func (s *Server) SendLocalTrust(ctx context.Context, r *reputation2.SendLocalTrustRequest) (*reputation2.SendLocalTrustResponse, error) {
+	req := new(reputation.SendLocalTrustRequest)
+	if err := req.FromGRPCMessage(r); err != nil {
+		return nil, err
+	}
+
+	resp, err := s.srv.SendLocalTrust(ctx, req)
+	if err != nil {
+		// TODO: think about how we transport errors through gRPC
+		return nil, err
+	}
+
+	return resp.ToGRPCMessage().(*reputation2.SendLocalTrustResponse), nil
+}