Our checkCompressedPoint stays: it matches the Go reference on every edge
case, is 1.3 KB gzip and adds no runtime dependency. Its assurance now
comes from a contrast test run on every test pass:
- 41 frozen edge-case encodings with the Go reference verdict (drand crypto
KeyGroup over kyber-bls12381 and kilic/bls12-381, as profile.Validate
uses it), reproducible with scripts/bls12381-go-verdicts.go;
- the audited @noble/curves 2.4.0 on the same edge cases and on a
fixed-seed corpus of valid points, negations, bit flips, random x and G1
points on the curve outside the subgroup.
Breaking the G1 or the G2 subgroup check makes the test fail.
@noble/curves 2.4.0 is a development dependency only; a test fails if
anything that is not a test imports it, and the build contains none of it.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
