hi, guys. can u tell me how to compare
# spicedbt
teso
01/10/2024, 4:08 PMhi, guys. can u tell me how to compare two zedTokens? can I decode it on the client side into something like a timestamp or a datetime value?
v
vroldanbet
01/10/2024, 4:19 PMZedTokens should be treated as opaque tokens, the internal representation is subject to change at any time. And depending on your datastore, it's implemented in one way or another.
t
teso
01/10/2024, 4:40 PMok. can we decode (or compare) it for debug purposes? (we use postgres). we have two events (know their tokens) and want to know which happened earlier
v
vroldanbet
01/10/2024, 4:45 PMpostgres is precisely the snowflake. It uses internals to PG MVCC that cant be easily compared
vroldanbet
01/10/2024, 4:45 PMI'm not even sure it can be done client side without reaching out to PG. @Jake ?
t
teso
01/10/2024, 4:46 PMfor debug it will be ok to make it on PG side
y
yetitwo
01/10/2024, 4:56 PM@teso what's the use case? what problem are you trying to solve by comparing tokens?
j
Jake
01/10/2024, 4:57 PMthey can be compared locally, even postgres, they just aren't 100% orderable
Jake
01/10/2024, 4:58 PMthat's not guaranteed to be true about all future zedtokens though, which is why they're opaque
Jake
01/10/2024, 5:01 PMyou can decode them with this: https://github.com/authzed/spicedb/blob/main/pkg/zedtoken/zedtoken.go#L63
you can parse them with this: https://github.com/authzed/spicedb/blob/main/pkg/datastore/revisionparsing/revisionparsing.go
and they are comparable according to the interface: https://github.com/authzed/spicedb/blob/main/pkg/datastore/datastore.go#L553
t
teso
01/10/2024, 5:08 PMI described our issue here: https://discord.com/channels/844600078504951838/844600078948630559/1194688894332051506