feat(go): U128 Mul/Div/Mod + exported FalconVerify (alpha.11) - #19
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Adds the arithmetic and signature primitives the source-template ports need: vesting's linear math (MulChecked then Div) and FALCON-verifying contracts (multisig, DAO governance). - U128.Mul (wrapping), MulChecked (256-bit product, overflow-detecting), DivMod/Div/Mod (64-bit-divisor fast path + binary long division). math/bits only — no math/big, so contracts stay small. Cross-checked against math/big over edge cases + 800 pseudo-random values. - FalconVerify(publicKey, msg, sig) bool — pointer-free wrapper over the falcon_verify host fn; verification runs host-side. Additive and backward-compatible → go/v0.1.0-alpha.11.
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Adds the arithmetic and signature primitives the Go source-template ports need:
U128.Mul/MulChecked/DivMod/Div/Mod— math/bits only (no math/big), cross-checked against math/big over edge cases + 800 pseudo-random values. Unblocks vesting (MulCheckedthenDiv).FalconVerify(publicKey, msg, sig) bool— pointer-free wrapper over the falcon_verify host fn. Unblocks simple-multisig and dao-governance.Additive, backward-compatible. Verified: native tests green, tinygo smoke build links,
go vetclean. Publishes asgo/v0.1.0-alpha.11.