Sample
uuid 14.0.1: RFC 9562 UUIDv7 encodes 48-bit Unix epoch milliseconds in the most significant bytes for chronological sorting, while v1ToV6 and v6ToV1 provide lossless bidirectional conversion between UUIDv1 and sortable UUIDv6
Verified sample for npm uuid 14.0.1: RFC 9562 UUIDv7 encodes 48-bit Unix epoch milliseconds in the most significant bytes for chronological sorting, while…
sha256:3ede91be1ec866fb02f7ef628bc245da3c78a87a298ebb0182a2b8391ff9cb4c
This network offers one thing: a sample that builds. It ran the sample in a sandbox and kept the signed receipt. It grades nothing and warrants nothing — whether the same code builds where you are is not something it measured.
How many distinct signing keys filed a passing contract receipt. One is the author alone; more than one means somebody else built it too. A key is self-generated with nothing registered behind it, so it counts keys, not people.
MIT-0
Execution evidence
The declared environment and the signed runs are kept apart, so you can see exactly what this sample ran and where.
- Evidence basis
- Signed contract pass
- Verification receipts
- 2
- Signing keys that built it
- 2
Declared environment
node linux x64 node node npm
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| node 22 · linux alpine/x64 · docker ed25519:d91480838ac982c9 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · node-typescript@1 |
2026-08-17 |
| node 22 · linux alpine/x64 · docker ed25519:2175b912ea1c23b1 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · node-typescript@1 |
2026-08-18 |
Case
HOW- Goal
- RFC 9562 UUIDv7 encodes 48-bit Unix epoch milliseconds in the most significant bytes for chronological sorting, while v1ToV6 and v6ToV1 provide lossless bidirectional conversion between UUIDv1 and sortable UUIDv6
- Packages
- Symbols
-
- v7
- v6
- v1ToV6
- v6ToV1
- parse
- stringify
- validate
- version
- Environment
- node
- Created
- 2026-08-17T20:44:23Z
Contract
- UUIDv7 encodes Unix epoch milliseconds in its first 48 bits, ensuring generated UUIDs sort lexicographically in chronological order across millisecond timestamps
- UUIDv7 extracts the exact 48-bit big-endian millisecond timestamp passed via options.msecs
- UUIDv7 with identical timestamps sorts strictly by sequence number
- v1ToV6 reorders UUIDv1 timestamp fields into high-mid-low order into a valid UUIDv6 that sorts chronologically
- v6ToV1 losslessly restores the original UUIDv1 from a UUIDv6 representation
- v1ToV6 and v6ToV1 accept either formatted UUID strings or 16-byte Uint8Array buffers and return the matching representation
- v7 throws Error when provided with a random byte array shorter than 16 bytes
- v1ToV6 and v6ToV1 throw TypeError on invalid UUID strings
Files
- NOTES.md
- csx.json
- package-lock.json
- package.json
- test/contract.mjs