gno.land/p/moul/x/daily/base32/v0

RFC 4648 and Crockford base32 — Encode, EncodeUnpadded, EncodeCrockford, Decode, DecodeCrockford.

1import "gno.land/p/moul/x/daily/base32/v0"
2
3base32.Encode("foobar")           // "MZXW6YTBOI======"
4base32.EncodeCrockford("hello")   // "D1JPRV3F"
5base32.DecodeCrockford("d1-jprv3f")  // "hello" — case folded, hyphen ignored

Two alphabets, for two different jobs. RFC 4648 (A–Z, 2–7, = padding) is the interoperable one — use it when something else has to decode the result. Crockford (0–9, A–Z minus I, L, O, U) is designed to be read aloud and typed back: decoding folds case, reads I/L as 1 and O as 0, and ignores hyphens, so a mis-heard identifier still decodes. U is excluded to avoid accidental obscenities.

Verified against the RFC 4648 §10 vectors at every partial-group length, and the demo's pinned output is that vector set — so the example doubles as a conformance test.

Decoding is strict where it matters: leftover bits after the final byte must be zero padding, never data, so "MB" is rejected rather than silently truncated. It is lenient where it is safe: lowercase and missing padding are accepted.

Base32 costs 60% expansion (8 characters per 5 bytes) against base64's 33%. You pay that to get an alphabet that survives case-insensitive systems and the telephone.

Live demo: r/moul/x/daily/base32demo · render it at /r/moul/x/daily/base32demo/v0.

Part of moul/gno-contracts — moul's versioned gno.land contracts. See the repository for the full catalog, build/test tooling, and usage.

🧪 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.