The bytes type sounds like a good choice to me. I could also imagine using
a pair of fixed64 fields if you want to avoid having to validate the length
of the byte string.

On Thu, Apr 28, 2016 at 10:39 PM, Osman Ali <[email protected]> wrote:

> Looking use a 128 bit uuid according to rfc4122. For Proto3 should use
> bytes type?
>
> So:
>
> message SendIdentifier {
>  bytes user_uuid = 1;
> }
>
>
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