Imports github.com/golang/protobuf/proto github.com/google/uuid github.com/opentracing/opentracing-go github.com/opentracing/opentracing-go/ext github.com/opentracing/opentracing-go/log golang.org/x/net/context google.golang.org/grpc Standard library imports bytes context encoding/json fmt io io/ioutil math net/http net/url os os/signal strings time