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Protobuf Overview

NSB uses a single Protobuf message type — nsbm — for all communication between the daemon, application clients, and simulator clients.

What nsbm Is​

Every message that travels across NSB — INIT handshakes, SEND/FETCH/POST/RECEIVE operations, PING checks, EXIT signals — is encoded as exactly one Protobuf message type: nsbm. There is no second message format. A single schema, shared between the C++ and Python client libraries, is what makes the two languages fully wire-compatible.

Schema File​

Location: proto/nsb.proto

Compiled outputs:

  • C++: cpp/proto/nsb.pb.cc and nsb.pb.h
  • Python: python/proto/proto/nsb_pb2.py (also in rabbit/proto/)

For the complete schema with every field documented, see Protobuf Schema.

Go Deeper​