Hello, 

I would like to add a checksum to my protobuf msg, as i understood its is 
possible by using CodeedOutputStrem and write the msg bytes and append a 
fix sized checksum 

While creating this binary stream, i would like to send it to another 
endpoint via gRPC

I was thinking about creating another protobuf msg and rpc which will be 
something like that:

message confWithChecksum {
string bytes = 1;  // this bytes will hold the conf + checksum appnded 
}

The only issue that i have to desirialze the msg twice  - for the the 
confWithChecksum msg and once for the actuatl conf msg after triming the 
checksum bytes.

Is there another elegant way of doing it? is there a way to use the grpc 
and just streaming bytes?

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