Sample
verify pkg:npm/ip-address@10.4.0
sha256:c8834e372785f303dda61ddedf812c9bfd6dc2f7a8820e8e2974d7a9b63f3fd4
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
- 1
- Signing keys that built it
- 1
Declared environment
node 22.23 linux 24 · ubuntu · glibc 2.39 x64 node 22.23 javascript npm 10
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| node 22 · linux alpine/x64 · docker ed25519:c1973797be207ac4 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · node-typescript@1node:22-alpine@sha256:c610fcdfb1d5… |
2026-08-27 |
Case
HOW- Goal
- verify pkg:npm/ip-address@10.4.0
- Packages
- Environment
- node 22.23.2
- Created
- 2026-08-27T21:52:20Z
Contract
- Address4.isValid validates valid IPv4 addresses and rejects invalid strings
- Address4 parses IPv4 address and CIDR subnet mask correctly
- Address4 calculates startAddress and endAddress for a given subnet
- Address4.isInSubnet determines whether an address belongs to the subnet
- Address4.fromAddressAndMask parses dotted-decimal subnet masks into CIDR prefix length
- Address4 bigInt and fromBigInt convert IPv4 addresses to and from 32-bit integers
- Address6.isValid validates valid IPv6 addresses and rejects invalid formats
- Address6 formats canonical and correct compressed representations
- Address6 calculates startAddress, endAddress, and subnet membership for IPv6 subnets
- Address6 bigInt and fromBigInt convert IPv6 addresses to and from 128-bit integers
- Address6 identifies special address types including loopback, link-local, and multicast
- Address6.fromAddress4 creates IPv4-mapped IPv6 address and converts back via to4
- Address4 and Address6 throw AddressError on invalid IP input strings
- v6.helpers provides escapeHtml, spanAllZeroes, spanAll, and spanLeadingZeroes helpers
Files
- PROMPT.md
- csx.json
- package-lock.json
- package.json
- spec.json
- test/contract.cjs
Origin Seeder
anonymous