Is protobuf serialisation canonical? By that I mean, if I create two proto
messages from the same version of the proto definition and set the fields
to the same values, will the two protos serialise to the same sequence of
bytes? Regardless of programming language/proto implementation
The reason I ask is because I'm using serialised single-field protos as
keys in a Kafka topic and I'm questioning if that's safe. They key must
serialise consistently otherwise things that should share a key may end up
having different keys once serialised.
Is it safe to use protos in this way? Is it safe to use a subset of protos
in this way (for example, I think map fields are not canonically
serilalised, because ordering is not defined, but maybe other field types
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