Same architecture as the dalek/risc0/betrusted forks: the Scalar52
arithmetic start-froms (11 fns) plus scalar::from_bytes_mod_order[_wide]
join the CurveField extraction, so the field, curve, and scalar layers
share a single type universe - the prerequisite for the signature apex,
whose verify glue must see curve AND scalar calls resolve to proven
definitions by fully-qualified name.
Proofs/ScalarDenote.lean flips its import CurveScalar.Funs ->
CurveField.Funs (one line; the whole scalar proof chain recompiles
unchanged on the merged gen). check-scalar.sh repoints its GEN list.
gen/CurveScalar retained until the deprecation pass, as on the siblings.
check.sh + check-scalar.sh both green, all certificates axiom-clean.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
extract.sh now opens crate::backend::serial::scalar_mul::vartime_double_base
(the other scalar_mul strategies stay opaque): non_adjacent_form (with its
loops), NafLookupTable5 (from/select), the curve-model helpers and
vartime_double_base::mul itself land in gen/CurveField - the same
namespace as the proven edwards operations, so the coming double-and-add
induction can consume EdDouble/EdAddProjNiels/EdConvert directly.
Zero sorries, zero external axioms (the pinned sources carry documented
compat refactors: single-assignment loop helpers, param-rooted while,
always-256-iterations, index-based LE load).
Full check.sh pressed fresh over the regenerated model: every existing
field and group-law certificate still green and axiom-clean - the scope
extension is purely additive.
Extraction widened to backend::serial::curve_models + edwards (matching the
reference recipe; extra opaque: backend::scalar_fits_in_128_bits — a
post-reference NAF-path helper whose generated code trips an Aeneas
namespace-shadowing wart). Reference Ed* suite compiles UNCHANGED (same
crate namespace). All proofs pass; both certificates axiom-clean.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
