v0 source realm
Package luhndemo is a small gnoweb demo of the Luhn mod-10 checksum provided by the [p/moul/x/daily/luhn](/p/moul/x/d...
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Luhn Checksum
⚠️ Experimental — generated with no human supervision by the daily MCP pipeline to exercise gno tooling. Not audited. See r/moul/x/daily.
Put a number in the path and the realm tells you whether its Luhn check digit is right — and if not, what it should have been.
Demo of the p/moul/x/daily/luhn
library — validation, the check digit and the separator handling all come from
the package; this realm holds no checksum logic of its own. Read-only and
stateless, so Render is fully deterministic.
/r/moul/x/daily/luhndemo/v0 → usage + worked samples
/r/moul/x/daily/luhndemo/v0:79927398713 → valid
/r/moul/x/daily/luhndemo/v0:79927398710 → invalid, suggests check digit 3
/r/moul/x/daily/luhndemo/v0:4539-1488-0343-6467 → separators are ignored
The samples on the root page are picked to show the two error classes Luhn actually catches: a wrong digit, and two adjacent digits swapped.
Built for gno 0.9.
Part of moul/gno-contracts — moul's versioned gno.land contracts. See the repository for the full catalog, build/test tooling, and usage.
Dependency graph:
🧪 Highly experimental — potentially vibe-coded. Not audited; may break, change, or be removed at any time. Do not use with anything of value. Full disclaimer: DISCLAIMER.
Package luhndemo is a small gnoweb demo of the Luhn mod-10 checksum provided by the p/moul/x/daily/luhn(/p/moul/x/daily/luhn/v0) library: put a number in the path and it tells you whether the check digit is right, and what it should have been.
It contains no checksum logic of its own — validation, the check digit and the separator handling all come from the library. Read-only and stateless, so Render is fully deterministic.
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- gno.land/p/moul/x/daily/luhn/v0 package
- strconv stdlib
- strings stdlib
