Imports github.com/prometheus/client_golang/prometheus golang.org/x/net/context google.golang.org/grpc github.com/opentracing/opentracing-go github.com/opentracing/opentracing-go/ext github.com/tracer/tracer/pb github.com/golang/protobuf/ptypes Standard library imports crypto/rand encoding/binary encoding/hex fmt io log math/rand reflect strconv strings sync time