security: fix 3 open-source blockers (docs + timing attack) - #126
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1) Internal docs moved out of the repo Five docs that leaked API key names, partner contracts, Railway service names, deployment budgets and 6-12 month business roadmap removed from HEAD and saved to a private location outside the repo: - docs/solana-landing-deployment-checklist.md - docs/solana-landing-tiered-architecture.md - docs/solana-landing-cost-model.md - docs/solana-landing-active-bench-plan.md - docs/france-cryptos-roadmap.md .gitignore picks up both the legacy filenames and a tripwire pattern (*-checklist / *-cost-model / *-roadmap / *-internal in docs/) so a future contributor can't reintroduce the same shape of internal-only doc without an explicit override. NOTE: git history still contains these files. Before flipping the repo public, run a one-off rewrite (git filter-repo --invert-paths --path docs/solana-landing-... etc) and force-push to a fresh public mirror. Not done here because it requires force-push coordination + a backup. 2) Constant-time CRON_SECRET comparison /api/cron/health-check now compares the Authorization header with crypto.timingSafeEqual instead of . The prior `===` shortcut leaked the secret one byte at a time under a remote timing attack (response latency varied with prefix match length). Pads provided header to expected length first to avoid throwing on mismatched buffer sizes, then ANDs with a length check so a shorter-but-prefix-matching header still fails. 3) Fail-closed in production when secret missing The previous `if (!secret) return true; // dev mode` would have silently published the route if CRON_SECRET fell off the vercel env (typo, rotation gap, project rename). Now production refuses any unsignaled request; dev keeps the permissive fallback. .vercel/project.json was flagged in the audit as committed - confirmed NOT committed (already in .gitignore). False positive, no action.
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Avant d'open-source : 3 fixes critiques.
git filter-repo --invert-paths --path docs/solana-landing-...+ force-push vers mirror public.crypto.timingSafeEqual()au lieu de===. Pad provided header pour éviter throw sur length mismatch..vercel/project.jsonétait un faux positif de l'audit (jamais commité).