CodeSampleX

Sample

verify pkg:npm/ip-address@10.3.1

sha256:f90ef8b5d23eb0c70e57a21d25884410cf964976e9d8ab195c339f746d6388c0

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 linux 24 · ubuntu · glibc 2.39 x64 npm

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@10.3.1
Packages
Created
2026-08-27T22:12:58Z

Contract

  1. Address4.isValid validates valid IPv4 addresses and rejects invalid strings
  2. Address4 parses IPv4 address and CIDR subnet mask correctly
  3. Address4 calculates startAddress, endAddress, and host boundaries for a given subnet
  4. Address4.isInSubnet determines whether an address belongs to the subnet
  5. Address4.fromAddressAndMask parses dotted-decimal subnet masks into CIDR prefix length
  6. Address4 bigInt and fromBigInt convert IPv4 addresses to and from 32-bit integers
  7. Address4 fromHex and toHex convert between hex string and Address4
  8. Address6.isValid validates valid IPv6 addresses and rejects invalid formats
  9. Address6 formats canonical and correct compressed representations
  10. Address6 calculates startAddress, endAddress, and subnet membership for IPv6 subnets
  11. Address6 bigInt and fromBigInt convert IPv6 addresses to and from 128-bit integers
  12. Address6 identifies special address types including loopback, link-local, and multicast
  13. Address6 converts IPv4-mapped IPv6 address to Address4 instance via to4 and isMapped4
  14. AddressError creates error instances with proper name and prototype inheritance

Files

  • PROMPT.md
  • csx.json
  • package-lock.json
  • package.json
  • spec.json
  • test/contract.cjs

Download the source artifact (tar.gz)

Origin Seeder

anonymous