uuid VS ksuid

I use Google's UUID package a lot. But every time I refer to it in a new package, the language server picks up https://github.com/gofrs/uuid instead of https://github.com/google/uuid and then complains that the gofrs package isn't in go.mod. I assume because it's the first alphabetically (though this seems like a huge supply chain security loophole).

Just store one single UUID as a token in a client's cookie (use https://github.com/google/uuid for ex), and associate that to a user ID (or anything else relevant in your case), and an expiry date for example

Depends on your needs I think, I generally just use github.com/google/uuid like /u/wowsux mentioned it supports v1 through v5 of the UUID spec.

And we are also going to use google/uuid to generate random uuids.

If you are using "github.com/google/uuid", try the following codes

You can see the same naming dilemma in many Go library implementations, i.e., where a package is used to organize functions related to a single a type (https://github.com/google/uuid) vs organizing code of related functionality (https://github.com/golang/go/tree/master/src/math).

Type inference is not perfect yet (especially for functional options). Also not being able to add type parameters to methods is a bit annoying (can be worked around using package-level functions) but besides that generics fit quite nicely into the library. If type inference gets better then I think I can even remove the hard dependency on github.com/google/uuid and let users use custom types for ids.

Learn how to create UUIDs: https://github.com/google/uuid

OP here - we avoid sequences in all but one part of our application due to a dependency. We use [KSUIDs][1] and UUID v4 in various places. This one "gotcha" applies to any sequence, so it's worth calling out as general advice when running a migration like this.

[1]: https://segment.com/blog/a-brief-history-of-the-uuid/

UUID v4 isn't large enough to prevent collisions, that is why segment.io created https://github.com/segmentio/ksuid which is 160bit vs the 128bit of a UUIDv4.

Assuming you don't need to use UUIDv7 (or any UUID's) then https://github.com/segmentio/ksuid provides a much bigger keyspace. You could just append a string prefix if you wanted to namespace, but the chance of collisions of a KSUID is many times smaller than a UUID of any version.

KSUID's are have temporal-lexicographical order plus 128 bits of entropy, which is more than UUIDv4.

https://github.com/segmentio/ksuid

That's why you use ksuid (https://segment.com/blog/a-brief-history-of-the-uuid/) or, if you're willing to go with a draft spec you could go with the new UUID formats https://www.ietf.org/archive/id/draft-ietf-uuidrev-rfc4122bi...

Interesting in more history of UUIDs? Twilio Segment's blog has an amazing history lesson about how they came to be.

I use the ksuid from segment. https://github.com/segmentio/ksuid