btcutil
ksuid
btcutil | ksuid | |
---|---|---|
2 | 38 | |
474 | 4,691 | |
0.4% | 1.0% | |
0.0 | 3.1 | |
10 months ago | 7 months ago | |
Go | Go | |
ISC License | MIT License |
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btcutil
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You Don't Need UUID
Your IDs are []byte of len=11. Those bytes can be represented in many ways.
You can represent them as hex strings via encoding/hex.EncodeToString(id), or base64 strings via encoding/base64.StdEncoding.EncodeToString(id), or base32 strings via encoding/base32.StdEncoding.EncodeToString(id), or etc.
Looks like the most used base58 package is https://pkg.go.dev/github.com/btcsuite/btcutil/base58, but looking at the implementation [0] I'm not impressed, and confident there's a better implementation
[0] https://github.com/btcsuite/btcutil/blob/v1.0.2/base58/base5...
But how you encode 11 bytes of data is kind of orthogonal to the important thing, which is that you have 11 bytes of data. They should be always be store in memory (in your application, or a DB, or anything else) as the actual 11 bytes of the ID, and not as a base58 or base64 or JSON or whatever other kind of string that can be decoded to the actual 11 bytes of data.
Likewise, a UUID shouldn't be stored as a string like "64d3f2e0-a4dc-48d3-98ad-7f09eb3b082f", that's a specific encoding of the actual 16 UUID bytes, you should store, process, etc. those bytes directly.
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Algorithm to get address?
Golang: https://github.com/btcsuite/btcutil
ksuid
- What happens after 100 years?
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Zero Downtime Postgres Upgrades
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/
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Bye Sequence, Hello UUIDv7
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.
- You Don't Need UUID
- A Brief History of the UUID
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Type-safe, K-sortable, globally unique identifier inspired by Stripe IDs
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.
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Unexpected downsides of UUID keys in PostgreSQL
KSUID's are have temporal-lexicographical order plus 128 bits of entropy, which is more than UUIDv4.
https://github.com/segmentio/ksuid
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UUIDs are so much better than autoincrementing ids and it's not even close
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...
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What Happened to UUIDv2?
Interesting in more history of UUIDs? Twilio Segment's blog has an amazing history lesson about how they came to be.
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Which UUID package do you use? and why?
I use the ksuid from segment. https://github.com/segmentio/ksuid
What are some alternatives?
dogecoin - very currency
ulid - Universally Unique Lexicographically Sortable Identifier (ULID) in Python 3
dxid - A better and safer way to display your primary keys in urls or in your app
pg-ulid - ULID Functions for PostgreSQL
nanoid - A tiny (124 bytes), secure, URL-friendly, unique string ID generator for JavaScript
bip39 - A web tool for converting BIP39 mnemonic codes
ulid-mssql - Implementation of ULID generator For Microsoft SQL Server
bitcoin-ruby - bitcoin utils and protocol in ruby.
python-ksuid - A pure-Python KSUID implementation
uuid7 - UUID version 7, which are time-sortable (following the Peabody RFC4122 draft)
cuid - Collision-resistant ids optimized for horizontal scaling and performance.