| context | Package context defines the Context type, which carries deadlines, cancellation signals, and other request-scoped values across API boundaries and between processes. |
| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| github.com/go-kit/kit/endpoint | Package endpoint defines an abstraction for RPCs. |
| github.com/go-kit/kit/transport/grpc | Package grpc provides a gRPC binding for endpoints. |
| github.com/go-kit/kit/transport/grpc/_grpc_test/pb | |
| google.golang.org/grpc | Package grpc implements an RPC system called gRPC. |
| google.golang.org/grpc/metadata | Package metadata define the structure of the metadata supported by gRPC library. |