github.com/cscfi/uuid
This package generates a 128-bit UUID based on Unix time (similar to one of CouchDB's UUID options).
The first 7 bytes indicate the time since the unix epoch in hex microseconds; the last 9 bytes are cryptographically secure random bits.
The benefits of this form of UUID are chronological sortability, which is good for database key usage, and a measure of protection against predictability, since it carries at least 72 bits of entropy (9 x 8b). Note that this doesn't necessarily make it a good choice for cryptographic purposes.
This package defaults to the UUID form without dashes, as they're not particularly useful in this format.
Licensed under MIT/ISC license. Use freely. Fixes and improvements welcome.
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